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2023-03-02

6 Aspects to Consider When Choosing the Best Supercapacitor Solution

1. Equivalent Series Resistance (ESR): ESR is the internal resistance of a supercapacitor and can affect its performance in high-power applications. A higher ESR can result in lower power output and decreased efficiency. When selecting a supercapacitor solution for high-power applications, it is essential to choose one with a low ESR. 2. Leakage Current: Leakage current is the amount of current that flows through a supercapacitor when it is not in use. A high leakage current can result in energy loss and reduced lifespan. It is important to choose a supercapacitor solution with a low leakage current for applications where energy efficiency is critical. 3. Cycle Life: The cycle life of a supercapacitor is the number of charge and discharge cycles it can undergo before its performance begins to degrade. A higher cycle life is desirable for applications where frequent charge and discharge cycles are required, such as in renewable energy systems. It is essential to select a supercapacitor solution with a high cycle life to ensure long-term reliability. 4. Self-Discharge: Self-discharge is the rate at which a supercapacitor loses its charge over time. A high self-discharge rate can result in reduced energy storage capacity and decreased efficiency. It is important to choose a supercapacitor solution with a low self-discharge rate for applications where long-term energy storage is required. 5. Safety Aspects: Supercapacitors can be prone to voltage spikes and other electrical issues that can affect their performance and safety. It is important to select a supercapacitor solution that includes safety features such as overvoltage protection, short-circuit protection, and temperature monitoring to ensure safe and reliable operation. 6. Cost: Supercapacitor solutions can vary in cost depending on their specifications and performance. It is important to consider the cost of a solution in relation to its performance and suitability for your application. In conclusion, selecting the best supercapacitor solution requires consideration of several technical specifications, including ESR, leakage current, cycle life, self-discharge, safety features, size and form factor, cost, and manufacturer reputation. By carefully evaluating these factors, you can choose a supercapacitor solution that meets the energy storage requirements of your application while providing high performance, long-term reliability, and safety.

Hit : 4364
2023-02-28

Supercapacitor VS. Battery: 8 Things to Know

1. Batteries are known for their ability to store large amounts of energy, which can be discharged over a long period. 2. Supercapacitors have a fast charge and discharge rate, which makes them ideal for applications that require quick bursts of energy. 3. Supercapacitors have a longer lifespan compared to batteries, as they can be charged and discharged more frequently without degrading. 4. Batteries have a higher energy density and can store more energy per unit of weight and volume than supercapacitors. 5. Supercapacitors have a higher power density, which means they can deliver higher power output per unit of weight and volume than batteries. 6. Supercapacitors have a higher efficiency rate than batteries, as they can convert more of their stored energy into usable power. 7. Batteries lose energy over time due to self-discharge, while supercapacitors do not. 8. Supercapacitors are used in applications that require quick bursts of energy, such as in electric vehicles, regenerative braking systems, and power tools. They are also used in applications that require frequent charge and discharge cycles, such as wind turbines and solar panels. In summary, supercapacitors and batteries have distinct characteristics that make them suitable for different applications. While batteries are ideal for applications that require a high energy density and a long discharge time, supercapacitors are ideal for applications that require a high power density and a fast charge and discharge time. As technology advances, it is likely that we will see a growing number of applications where supercapacitors and batteries are used together to achieve optimal energy storage and management.

Hit : 4344
2023-02-23

The Benefits of Supercapacitor and Battery Hybrid Systems

Supercapacitors and batteries are both essential components of hybrid systems, which are becoming increasingly important as we move towards a more sustainable future. While batteries are excellent for storing large amounts of energy over extended periods, supercapacitors excel at delivering short bursts of high-power energy quickly. When combined in a hybrid system, these two technologies complement each other perfectly. One of the main benefits of using a hybrid system is that it allows for greater energy efficiency. By using a supercapacitor to handle short-term energy spikes and a battery to provide sustained power over time, energy waste can be minimized, and the system can operate more efficiently overall. This is especially useful in applications such as electric vehicles, where both high-power bursts and sustained power are required. VINATech is a leading manufacturer of supercapacitors and supercapacitor systems. We offer a range of solutions designed for various applications, including automotive, renewable energy, and industrial systems. Our supercapacitors are known for their high energy density, long life, and fast charging capabilities. We are constantly innovating and developing new technologies to meet the evolving needs of the market. In conclusion, hybrid systems that utilize both supercapacitors and batteries offer numerous benefits, including increased energy efficiency and improved performance. VINATech is at the forefront of this technology, producing some of the best supercapacitors and systems on the market. Our commitment to innovation and sustainability makes them an ideal partner for anyone looking to develop or improve a hybrid system.

Hit : 4237
2023-01-03

Supercapacitor HESS for Frequency Regulation in Thermal Power Generation Systems

Supercapacitor-Based Hybrid Energy Storage Systems for Frequency Regulation in Thermal Power Generation Systems Adam Song, Victor Sazonov, VINATech Co. 1. Global Safety Challenges Related to Using Lithium-Ion Batteries in Energy Storage Systems According to some estimates, the global market of Energy Storage Systems (ESS) is expected to grow at a 30% rate annually. However, one of the factors slowing down the growth of the ESS market is caused by the variety of issues related to using lithium-ion batteries (LIB) as the most common energy storage type. Although LIB-ESS is considered to be relatively cost-effective, there are certain problems related to durability, maintenance, safety, and non-eco-friendliness. In particular, in the case of an energy storage system for frequency regulation (FR-ESS), frequent charging and discharging caused by short-cycle frequency fluctuations shortens battery life, increases maintenance costs, and causes battery combustion. Fire accidents have been occurring in battery energy storage plants globally (Figure 1). The most recent cases have been occurring in China, Korea, and the US. In October 2022, the 100MW energy storage plant at Yingge Haiyan Salt Field in Hainan Province had a fire accident raising concerns about the safety aspect of using LIB. Similar accidents were occurring in the US, including the ESS explosion in Arizona. South Korea has been dealing with over 30 ESS plant fire accidents over the past few years which raised the government’s concern about the safety of LIB in ESS and the possible measures that could help to improve safety and avoid fire accidents. Thus, any country in the world can experience fire accidents related to the usage of LIB-ESS. Figure 1 - A breakdown of the stationary energy storage failure events (Source: BESS Failure Event Database) The maintenance aspect of LIB has also been an issue that is hard not to take into account. Since batteries need to be replaced relatively more often, this creates additional ongoing expenses related to operating the ESS in the long term. 2. Supercapacitor Solution for Frequency Regulation Hybrid Energy Storage Systems in Thermal Power Generation: Increased Lifespan and Safety There are different types of ESS in terms of functions and energy source technologies. We will consider the Frequency Regulation Energy Storage Systems (FR-ESS) used for the regulation of frequency in thermal power generation systems. A stable frequency is essential for power management and power quality stabilization for the safe operation of customer appliances. However, the frequency can change depending on the changes in demand and supply. The frequency should be maintained within a certain range for a normal operation (± 3/100 Hz). The frequency regulation (FR) is implemented by using ESS which maintains the balance between power supply and demand by either providing additional power during peak times or storing the surplus of power when the power supply is in surplus. The best alternative to a traditional LIB-based FR-ESS is a hybrid type of FR-ESS (HESS) that uses the existing lithium-ion batteries along with the new Supercapacitor Solution Technology developed by VINATech. The graph presented below visually illustrates how VINATech supercapacitors regulate the short and instantaneous frequency fluctuations (up to 30 seconds) while batteries regulate the long fluctuation cycles (longer than 30 seconds). Figure 2 – LIB-ESS VS. HESS: Frequency Regulation (Source: KEPCO) FR-ESS operates through several thousand to tens of thousands of cycles a day. In the case of HESS, the SC-ESS is responsible for 60% to 80% of the frequency adjustments, which is why lithium-ion batteries experience lower Depth of Discharge (DOD) and go through a fewer number of cycles which extends the entire lifespan by 1.87 times. According to multiple recent studies, the lifespan of lithium-ion batteries is significantly increased in Hybrid Energy Storage Systems that utilize supercapacitors. Let us consider the example of a 5MW HESS. In this system, the supercapacitors and batteries are used in the proportion of 1 to 4. We have analyzed the total cost of ownership of a traditional LIB-ESS and HESS based on VINATech Supercapacitor Solution technology. All the estimates are presented in terms of current price levels and may vary depending on different factors. Here is the simple calculation of the total cost of ownership of 5MW LIB-ESS and 5MW HESS that uses VINATech Supercapacitor Solution: 1. 1MW LIB Cost = $115,000; 1 MW SC Cost = $268,000; 2. 5MW LIB-ESS Cost: $115,000*5 = $575,000; 3. 5MW LIB-SC Hybrid ESS Cost: 4MW LIB + 1MW SC = $115,000*4 + $268,000 = $728,000. Table 1 visually compares the 20-year total cost of ownership for the analyzed systems. 5MW ESS Type Installation Cost Life Cycle 20-Year Cost LIB ESS $575,000 10 years $1,150,000 LIB-SC Hybrid ESS $728,000 20 years $728,000 Table 1 – LIB-ESS and LIB-SC ESS: 20-Year Total Cost of Ownership (TCO) And since supercapacitors are considered to be eco-friendly energy storage devices that don’t explode or combust even when being exposed to open fire, creating a hybrid system that includes both batteries and supercapacitors helps to decrease the number of batteries used in the system by 20%, increase their life span by redistributing the role of regulation of the short-cycle high-power output fluctuations to supercapacitor systems and, as a result, decrease battery waste and increase eco-friendliness of the whole system. Moreover, supercapacitor HESS can potentially be more beneficial not only for an operator but also for the end consumer, resulting in reduced electricity bills. To summarize, HESS is a strategy that compensates for the disadvantages of LIB and maximizes the advantages by using the most cutting-edge supercapacitor solutions developed by VINATech and, as a result, improves the durability, maintenance, safety, and eco-friendliness and also ensures efficient power quality stabilization with low maintenance costs of the Frequency Regulation Energy Storage Systems. 3. VINATech Supercapacitor Solution for FR-ESS Currently, VINATech Supercapacitor Solutions are considered to be the best in the world on the market of FR-ESS due to the following main reasons: 1. Master CMS Technology (Capacitor Management System) 2. Firmware, SOC/SOH Algorithm Technology (Operating System, Battery Charge/Discharge Status, Battery Life Prediction Algorithm) 3. Quick Development and Testing Cycles 4. Experience and expertise from collaborating with KEPCO (Korea Electric Power Corporation) Figure 3 – VINATech Supercapacitor Solutions for FR-ESS If you are interested in increasing the durability, decreasing maintenance costs, improving safety, and eco-friendliness of your Frequency Regulation Energy Storage System, feel free to contact us to discuss how we can help you develop the best-customized supercapacitor solution for your operation. Figure 4 – VINATech Supercapacitor Solutions for Korea Electric Power Corporation (KEPCO) 4. About VINATech VINATech is a global energy solutions provider specializing in the manufacturing of supercapacitors and fuel cell components. VINATech started its business in 1999 and became an elite energy solutions provider for the global leading companies in a variety of industries such as automotive, IoT, consumer electronics, logistics, healthcare, renewable energy, and many others. VINATech Headquarters and R&D Center are located in Jeonju, South Korea. VINATech’s products are currently produced in factories in South Korea and Vietnam. 5. Sources 1. U. Akram, N. Mithulananthan, R. Shah and S.A. Pourmousavi, "Sizing HESS as inertial and primary frequency reserve in low inertia power system", IET Renewable Power Generation, vol. 15, no. 1, pp. 99-113, 2021. https://ietresearch.onlinelibrary.wiley.com/doi/full/10.1049/rpg2.12008 2. Cao Y. Optimal sizing of hybrid energy storage system considering power smoothing and transient frequency regulation, Int J. Electr. Power Energy Syst (2022) https://www.sciencedirect.com/science/article/abs/pii/S0142061522002575 3. Punna, S., Manthati, U.B. Optimum design and analysis of a dynamic energy management scheme for HESS in renewable power generation applications. SN Appl. Sci. 2, 495 (2020). https://doi.org/10.1007/s42452-020-2313-3 https://link.springer.com/article/10.1007/s42452-020-2313-3 4. BES Failure Event Database, Electric Power Research Institute: https://storagewiki.epri.com/index.php/BESS_Failure_Event_Database

Hit : 4451
2022-12-27

VINATech Hybrid Capacitors in Emergency Lighting: Long Life, Low Costs

Back-up Power in Emergency Lighting Emergency lighting provides light in an emergency when the mains power has failed as the result of a fire or a power cut, allowing for safe evacuation from the building. Back-up power comes from either a self-contained battery a or centralized battery system, the advantages and disadvantages of which are as follows: 1. Self-Contained Advantages: - The installation is faster and cheaper - Standard wiring material may be used - Failure of mains supply due to cable burn-through will automatically trigger the affected emergency luminaire to come on - Low maintenance costs – periodic tests and general cleaning, only, required - Low hardware equipment costs – no requirement for extended wiring, special ventilation, etc - The integrity of the system is greater because each luminaire is independent of the others - System can easily be extended with additional luminaires - No special sub-circuit monitoring requirements Disadvantages: - The environmental conditions will vary throughout the system and batteries may be adversely affected by a relatively high or low ambient temperature - Battery life is limited to between 2 and 5 years, dependent upon the application - Testing requires isolation and observation of luminaires on an individual basis 2. Central Battery Source Advantages: - Maintenance and routine testing are easier, with only one location to consider - The life of a battery is between 5 and 25 years, dependent upon the type - Environmentally stable in a protected environment; the slave luminaire can operate at relatively high or low ambient temperatures - Large batteries are cheaper per unit of power and luminaires are usually less expensive Disadvantages: - High capital equipment costs - The cost of the installation and system wiring is high because the fire-resisting cable is required for each slave luminaire - Poor system integrity – failure of the battery or wiring circuit can disable a large part of the system - A requirement for a ‘battery room’ to house cells and charger circuits, etc; ventilation of acid gases may also be needed - Localised mains failure may not trigger the operation of emergency lighting in that area - Voltage drop on the luminaire wired furthest from the central battery could become a problem 3. Electric Double-Layer Capacitors Another option that has seen limited uptake is a self-contained product utilizing Electric double-layer capacitors (EDLCs, also known as supercapacitors or ultra-capacitors). This option has the advantage of a long, maintenance-free, service life with a fast test function and rapid recharge capability but the capacitors can be large and relatively expensive compared with the battery alternatives. 4. VINATech's New Hybrid Capacitor With the launch of the VEL1865 Hybrid Capacitor (also known as VPC, Vina Pulse Capacitor) from VINATech, there is now a better alternative for powering self-contained luminaires that overcomes the disadvantages of both the typical battery solution as wells as the EDLC approach. Conclusion For self-contained luminaire products the use of VINATech Hybrid Capacitors, like the VEL1865 from VINATech, offers a high energy density solution that can meet regulatory hold-up time requirements in a standard battery form factor. While also offering the long, maintenance-free, service life and short state of health test cycles provided by more expensive EDLCs. These features make Hybrid Capacitors a great choice for manufacturers of emergency lighting who are looking to differentiate themselves in a crowded market, deliver value to their customers and help the environment.

Hit : 4187
2022-12-16

Benefits of Using VINATech Supercapacitors in IoT Applications

IoT Industry: Rapid Growth and Challenges The Internet of Things (IoT) is a broad concept for connecting devices via the internet to simplify activities like stock reordering, predictive maintenance ,and remote control & monitoring. Data from remote devices is collected via an IoT hub or gateway where it is either sent to the cloud or analyzed locally. With the analysis leading to increased efficiency and productivity, reduced waste, improved service delivery, and optimization of resource usage. These benefits have resulted in IoT becoming a key technology in our homes, cities, and businesses across the globe. Although the rapid rise in IoT does present some challenges. The explosion in the number of IoT devices rightly raises environmental concerns, with over 35 million devices already connect and a further 40 million projected to be added by 2025, about how we power these devices in a sustainable way. This is why new energy harvesting solutions are closely linked to IoT and also this explains the interest in supercapacitor solutions for energy storage. IoT Communication Protocols Communication protocols for IoT include LoRaWAN, NB-IoT, Sigfox, Bluetooth, Z-Wave, 6LowPAN, Zigbee, WiFi, and many others. Each of these protocols provides a trade-off between transmit range, data rate, and power consumption, details of which can be seen in Table 1 below: Table 1 – IoT Communication Protocols The use of supercapacitors in IoT is twofold; they can store energy from renewable sources (solar, wind, RF, vibration, etc.) that is then used to power the sensor and communications circuitry. Alternatively, where a relatively high transmit current is required, the capacitor can be combined in parallel with a battery. The battery provides the continuous current required by the circuit and the low-series resistance capacitor delivers most of the peak current required for data transmission. By doing this the peak current stress on the battery is reduced and its operating life can be extended by 2-3 times the expected duration using the battery alone, a benefit that is especially important in remote applications where battery replacement is time-consuming and expensive. IoT Application Examples Asset Tracking: There are several different types of asset tracking from tracking goods in transit by shipping container, truck, or train, tracking vehicles like taxis, company cars, delivery vans, agricultural or construction machinery, etc., and tracking individual assets like cattle. Each of these presents its own challenges and has different options for powering the electronics. In vehicle tracking, the 12V lead acid battery is the main power source but when it’s disconnected, backup power is required to either: move data from volatile memory to flash, which is normally important when the system is monitoring driving style (speed, acceleration, breaking etc.) or support a last-time transmit, giving a leaving network signal and proving the last known location. For both of these, supercapacitors provide the ideal solution, with cells connected in series for 5V or 12V operation supercapacitors can be sized to support the required hold-up time even after 15-20 years of maintenance-free operation. Remote Monitoring Remote, battery-powered, applications include traffic, pollution, weather, river level, drain & manhole, commercial waste bin, and soil moisture monitoring. The batteries can be either primary lithium cells or rechargeable Li-Ion batteries utilizing solar PV cells for recharging, both of which present an opportunity to utilize supercapacitors. The use of Li-Ion batteries presents some issues, including: - Flammability concerns - Poor low-temperature performance - Relatively expensive - Short service life (3-4 years) These issues can be overcome by utilizing Electrochemical Double-Layer Capacitors (EDLC) or Hybrid Lithium Capacitors (LIC). For example, in a solar-powered sensor that might use Li-Ion batteries, the following alternatives are available: 1) VINATech Hybrid Capacitor VEL13353R8257G, 250F, 3.8V. It can be directly mounted on the PCB and provide reliable -25 - +70°C operation over 10–15 years of operating life. 2) VINATech WEC3R0107QD, 100F, 3V EDLCs (connected in series). This solution also has the benefit of -40 - +70°C operation and up to 20-year maintenance-free life. Both solutions provide a very long cycle life, with none of the flammability or disposal issues associated with Li-Ion batteries. As such these options provide a much more reliable solution with a lower total cost of ownership than the main battery alternatives. Smart Metering: In gas and water meter applications the energy and power requirements depend on the communication protocol being used, with LoRa and GSM being commonly selected. The energy storage element in both cases is typically a Lithium Thionyl Chloride battery with a parallel connected EDLC or LIC where required. Using the following examples, we can look at the requirements for each protocol: LoRa Water Meter As can be seen from Table 1 above, current consumption for LoRa is ~50 micro-Amps continuous with a peak transmit current of 40mA for 5s. This level of consumption can be supported by 1 or 2 AA size Lithium Thionyl Chloride batteries with the pulse current accounting for 20% of the energy usage, assuming 1 transmit cycle per day. The issue with this approach is that at sub-zero temperatures the battery impedance increases to a point where it can no longer deliver the required peak current. Also, repeated pulse currents stress the battery causing passivation and accelerated aging. So where sub-zero temperature operation or multiple daily transmit pulses are called for, the addition of a parallel connected EDLC is required to ensure reliable long-term operation. For example, the VINATech WEC6R0504QG, 0.5F 6V part with its low, 435mW, ESR and 2x increase in battery operating life. GSM Gas Meter Using GSM allows for a much longer transmission range but also requires much higher current pulses for longer durations, making the use of a stand-alone primary battery impractical. Where 1-2A pulse currents are required then either an EDLC or LIC solution can be used depending on the exact requirements, for example, a 1A peak current required during transmit period could be supported by: 1) 2 x VINATech WEC3R0356QG (35F, 3V) cells connected in series, the advantage of this solution is the excellent low-temperature performance down to -40°C and the ultra-low ESR (

Hit : 4226
2022-10-25

World's BEST Supercap Module Technology: Interview with VINATech

VINATech has opened its plans to transform the future eco-friendly energy markets of urban mobility, smart grid, and logistics by developing the world's best supercapacitor modules (packs) technology. VINATech has been working with some of the world's biggest technological giants to develop the ultimate supercapacitor pack solutions which include the world's most cutting-edge software and hardware systems such as Supercapacitor Cell Management and Control Systems applicable for hundreds of thousands of supercapacitor cells. Having the 1st comer's advantage, VINATech has already started testing its new supercapacitor module technology systems in fuel cell hydrogen vehicles, FR ESS systems, AGVs, etc., collaborating with the world's biggest companies with the mission to lead our world towards a safe and eco-friendly future. Watch our new video to find out what makes VINATech SUpercapacitor Modules so special!

Hit : 4238
2022-10-18

VINATech's MEA and Bipolar Plates were Presented at the World’s Largest Hydrogen Exhibition

VINATech's MEAs and Bipolar Plates were Presented at the World’s Largest Hydrogen Mobility Exhibition H2MEET 2022. Over 30,000 people from all over the world visited the exhibition. Korea's largest technological giants participated in the exhibition and shared their plans to make a better future by utilizing hydrogen energy. VINATech was always at the forefront of Korea's most rapidly growing technology companies, sharing its vision and plans to contribute to the future's hydrogen economy. This year VINATech has come up with an even wider range of its top products including supercapacitor modules, MEAs, and Bipolar Plates. Since the company has been always focused on carbon technology, it has effortlessly diversified its products range adding MEAs, Bipolar plates, and other carbon-related products to its portfolio and quickly attracting the world's most famous companies as its partners and customers.

Hit : 4174
2022-09-07

Samsung Opened the License of Its New Eco Remote Which Uses VINATech Hybrid Supercapacitor

Source: www.samsung.com Picture 1 - Benjamin Braun, Chief Marketing Officer and Vice President for Samsung Europe, delivering an opening speech at the IFA 2022 press conference At the IFA 2022, Europe's largest home appliance exhibition held in Berlin, Germany, Samsung Electronics announced that it has opened the license of Its Eco-Friendly Solar Cell Remote Which Uses VINTATech’s Hybrid Supercapacitors. The technical disclosure will let companies all around the world utilize the power of the most cutting-edge technology and get rid of batteries in all remote controls using VINATech’s Hybrid Supercapacitor which is considered to be the number one eco-friendly alternative to batteries. On its website, Samsung Electronics has already announced its goal to ”Expand eco-friendly solar cell remote control that is charged with signals from solar power, indoor lighting, and 2.4GHz Wi-Fi routers and open related licenses “. Earlier the company also announced that it will include the Solar Cell Remote in more of its products, with a goal of eliminating over 200 million batteries from landfills all around the world. In other words, VINATech’s Hybrid Supercapacitor has the potential to help the world get rid of millions of batteries and create an eco-friendly future for our planet. In the picture below, you can see how VINATech’s Hybrid Supercapacitor called VPC (Vina Pulse Capacitor) is used as the main part of the energy equation. Source: https://solarcellremote.samsung.com/ Picture 2 – Eco-Friendly Remote Control Technology Configuration If you are considering applying for Samsung’s free open license, please register on the page below: https://solarcellremote.samsung.com/ With the Samsung’ New Eco Remote open license, companies all around the world will be able to produce remote controls utilizing VINATech’s VPC to get rid of batteries. This will help to eliminate millions of batteries from our planet and help create a sustainable future.

Hit : 4164
2022-08-30

H2 MOBILITY ENERGY SHOW 2022

We are happy to announce that VINATech will participate in H2 Mobility Energy Show 2022 (31 August – 3 September) in KINTEX, Hall 9, 10A, Booth G25 (Ilsan, Gyeonggi-do, Republic of Korea). VINATech will introduce Carbon Supports, Catalysts, MEAs, and Bipolar Plates along with its other products. VINATech is the only Korean company that manufactures Carbon Supports, Catalysts, MEAs, and other core fuel cell materials and components. We will be glad to meet you at KINTEX, Hall 9, 10A, Booth G25.

Hit : 4164
2022-05-10

VPC safety test

Vina Pulse Capacitor (VPC) is a Hybrid Supercapacitor (also known as Hybrid Capacitor) developed by a Korean supercapacitor manufacturer VINATech. It combines the best characteristics of batteries and supercapacitors. In this video, we are going to show you the results of 5 safety tests that were conducted in order to demonstrate the exceptional safety characteristics of VPC under the most extreme conditions. The purpose of those tests is to prove that VPC can is more stable and safer in comparison to batteries. The ability to undergo extreme conditions without combustion or explosion is important for those applications which require safety and reliability. 1. VPC: Technical Specifications Product Name Rated Voltage Operating voltage Capacitance Operating temperature Weight(g) VEL10303R8107G 3.8 3.8V ~ 2.5V 100F -25℃ to +70℃ 4.4 (±0.3) *Link to the full technical specification (https://www.vinatech.com/winko/data/product/data_sheet_VEL10303R8107G.pdf) 2. Test Descriptions and Comments 1) VPC Short-Circuiting The VPC cell is short-circuited by connecting its two wires together. The Temperature goes up to 114℃ without any combustion or explosion occurring. 2) VPC Penetration The VPC cell is penetrated with the nail which causes internal short-circuiting. The Temperature goes up to 103℃ without any combustion or explosion occurring. A small amount of electrolyte is released as the casing is breached. 3) VPC Crushing The VPC cell is crushed with pliers. The Temperature goes up to 114℃ without any combustion or explosion occurring. 4) VPC Burning The VPC cell is burned with the flame directed at it. The cell doesn’t explode. The safety vent opens, and the electrolyte vapor is released with the pressure. VPC cells don’t pose the danger when exposed to open fire even for extended periods of time. The electrolyte does not combust. 5) VPC Overcharging VPC cell is charged with 2 amperes at 5.0V. The overcharging causes the temperature and pressure to increase within the cell. When the cell’s temperature exceeds 140 ℃, the safety vent opens and releases the electrolyte vapor without any combustion or explosion occurring. Vina Pulse Capacitor shows outstanding characteristics of safety and doesn’t explode or combust when being short-circuited, penetrated, crushed, burnt, and overcharged. Therefore, Vina Pulse Capacitor can be widely used as a backup power source or even as the main source in a variety of applications that require safety and stability. Watch the detailed video which demonstrates the results of VPC tests here: https://youtu.be/-TNvMpjk0_c

Hit : 4196
2022-03-24

Usage of Supercapacitors in Wind Turbine Pitch Control Systems

Usage of Supercapacitors in Wind Turbine Pitch Control Systems: Economic Analysis Victor Sazonov, VINATech, Co., Ltd. March 2022 1. General Overview The main function of the pitch control system in a wind turbine is to adjust the angle of the blades depending on the direction of the wind to maximize power output. In case of severe storms, the pitch control system is responsible for shutting down the blades to prevent the system from damage and failure. During recent decades, supercapacitors’ role in wind energy has been dramatically increasing. Many pitch control system manufacturers have been choosing supercapacitors for the electrical pitch control systems to challenge the traditional way. Why do many pitch control manufacturers have considered supercapacitors as the best alternative to battery-based systems? Generally, pitch control systems are divided into hydraulic and electrical systems. Electrical pitch control systems use batteries or supercapacitors as the power backup source. We will refer to electrical pitch control systems which use batteries for a backup power source as “battery-based pitch control systems”. Similarly, electrical pitch control systems which use supercapacitors as a backup power source will be referred to as “supercapacitor-based pitch control systems”. 2. Cost Analysis Using supercapacitors as a backup power source in electrical pitch control systems is associated with lower costs when compared to battery-based pitch control systems due to a longer life cycle, little or no maintenance, and no requirement for heating or cooling systems. Contrary to battery-based systems, supercapacitor-based pitch control systems require little or no maintenance due to the wide operating temperature of supercapacitors. Supercapacitors can operate in extremely low and high-temperature environments, ranging from -40°C to +65°C. The usage of supercapacitors doesn’t require any heating and cooling systems, which results in lower costs. When comparing the supercapacitor-based pitch control system to the battery-based ones, it’s important to notice the difference in the life cycles. Supercapacitors have longer life cycles than batteries since they go through thousands of short charge-discharge cycles. Thus, supercapacitor-based pitch control systems have a life cycle of more than 10 years while battery-based systems are characterized by 2 to 4-year life cycles. Due to the shorter life cycle, batteries need to be replaced every 2 to 4 years which leads to additional costs. This also leads to an increased shutdown time during which a turbine doesn’t operate. This shutdown state of a wind turbine is referred to as the “State of Absolute Unavailability”(1). The state of absolute unavailability is one of the biggest cost components associated with the maintenance of wind turbines. During this state, a wind turbine is not producing any electricity which results in wasted power. In the case of battery-based systems, the maintenance time related to the battery replacement varies depending on different factors. In the case of a 2MW wind turbine, the average downtime caused by pitch control system failure (including battery-related ones) is approximately 4 hours(1). The state of absolute unavailability of wind turbines caused by the battery replacement occurs at least every 4 years and is about 4 hours. Therefore, during a 20-year period (typical wind turbine life cycle) there are at least 4 times when the wind turbine is in a state of total unavailability caused by the replacement of the battery. Corresponding to this, during a 20-year period, the total shutdown time for one wind turbine would be about 16 hours. In the case of a wind park consisting of 21 2MW turbines, the total 20-year shutdown time would be equal to 336 hours. In the case of the Vestas 2MW wind turbine, 601.10 kW/h are produced with a wind speed of 7 m/s(2). If we assume that the price of electricity is equal to 21.27 cents per KW/h (average electricity price in Europe in 2020(3)), then, based on the assumptions mentioned above, the following calculation of wind turbine unavailability cost can be proposed: 0.2127 × 4 × 601.1 = €511.4 In this example, every 4 hours of shutdown caused by the battery replacement can lead to the approximate cost of €511.4. If we consider the period of 20 years, the total cost would be equal to €2,045.6. Furthermore, in the case of a 21-wind turbine park, the total 20-year cost of unavailability caused by the battery replacement would be equal to €42,957.6. However, in the example of a supercapacitor-based pitch control system, since the replacement occurs only once during a 20-year period, the associated cost for a 21-turbine wind park would be about 16 times smaller – €2,684,9 (0.2127×601.1×21= €2,684,9). Figure1: Cost of Downtime Associated with Battery and Supercapacitor Replacement in Pitch Control Systems As for the total cost of ownership, the supercapacitor-based pitch control is considered to be at least 2.5 times more cost-effective than a battery-based system when considering a 20-year life cycle of a wind turbine. As we can conclude from Figure 2, due to the regular replacement of batteries in pitch control systems, the cost of ownership of battery-based systems is significantly higher than the cost of ownership of supercapacitor-based systems. Figure 2: Total Cost of Ownership of Supercapacitor and Battery 3. Eco-friendliness and Safety Supercapacitors are widely considered to be an eco-friendly energy solution due to the lack of chemical substances, absence of heavy metals, and the resulting easiness of utilization. Supercapacitors are made of pure carbon and the cases are usually made of aluminum. Contrary to supercapacitors, batteries are made of lithium, nickel, manganese, graphite, and other materials, which are not eco-friendly and bear a risk of explosion. Since wind turbines are mostly located in remote or rural areas, the safety aspect is one of the most important reasons why the usage of supercapacitors in pitch control systems is becoming more and more popular. The Annual Energy Production (AEP) of a wind turbine is the total amount of electrical energy produced over a year. Supercapacitor-based pitch control systems help to increase AEP by minimizing shutdown time and maintenance cost. Moreover, supercapacitor-based systems offer a safer and eco-friendlier alternative to battery-based systems. Wind turbine manufacturers, which in most cases provide the regular maintenance of wind turbines, are likely to increase the efficiency and cost-effectiveness of their maintenance operations by using supercapacitor-based pitch control systems. 4. Case of 2MW Wind Turbine Application: VINATech Pitch Control Supercapacitor Module VINATech’s Pitch Control Supercapacitor Module can be customized for different types of pitch control systems. In the example below, the VEM16R0606QG module was customized for a 2MW wind turbine. • Rated Capacitance: 60F • Rated Voltage: 16V • Operating Temperature: -40°C ~ 65°C • Cycle Life: 500,000 cycles In this case, VINATech’s supercapacitor module VEM16R0606QG has been successfully used in 2MW wind turbine pitch control systems for more than 5 years. This proven track record demonstrates the reliability of VINATech’s supercapacitor modules as the main alternative to traditional battery-based systems. VINATech’s Pitch Control Supercapacitor Module can be customized for different types of pitch control systems and wind turbines. Please, feel free to send us your inquiries at: https://www.vinatech.com/eng/contact/inquiry.php (1) Carvalho, M., Nunes, E., Telhada, J. (2013a). Maintenance costs of a pitch control device of a wind turbine. Proceedings of the World Congress on Engineering 2013, July 3-5, London, 569-574; (2) Wind Turbin Models: Vestas V 90; (3) Electricity Price Statistics - European Commission.

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2022-01-28

Happy new year of the tiger 2022!

Happy Lunar Nrrrrrrrrr year! According to the Chinese Zodiac, 2022 is the year of the Tiger. As we all know, a tiger is known as the king of animals that dominate the jungle. Tigers are rapid. They have a maximum running speed of 80 km/h. They also can climb up a high tree and swim in the water. Also, tigers are incredibly adaptable, so they can be found in a variety of climates. They can survive in extreme temperatures: from -40°C (Russia) to +40°C (India). For a long time in history... a Tiger has been regarded as a mysterious and spiritual animal. Tiger is an animal that symbolizes braveness and progress. They also imply a message of protection against bad energy, disasters, and accidents. That’s why you can see many tiger images in amulets related to Shamanism. Such powerful energy! Adaptability to the environment in extreme temperatures! It protects from loss, unexpected accidents, and disasters! Does this sound familiar to you? (Or am I the only one who thinks this way?) Wish you a wonderful 2022, full of Tiger’s energy and protection!

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2022-01-20

Challenging the Status Quo of Supercapacitors and Batteries by Finding the Unique Middle Ground

Where are Supercapacitors Used? Supercapacitors are widely used to increase the efficiency of smart meters, UPS, passenger vehicles, wind turbines, AGVs, smart devices, etc. Supercapacitors play a major role in many devices we use or see every day, such as emergency lights, dashcams, elevators (emergency power back-up, regenerative braking), Internet of Things (IoT), and many others. To put it simply, supercapacitors play an important role in products and solutions that make our life not only more convenient but also much safer. Contrary to conventional batteries, supercapacitors go through several rapid charge-discharge cycles while having higher power density and longer service life. In other words, supercapacitors are of absolute necessity when delivering instantaneous charges is required. Can Supercapacitors Replace Batteries? The answer would be “Yes” and “No”. Supercapacitor is known as a next-generation ecofriendly energy storage component. Depending on industries and applications, the supercapacitor's “territory” is getting wider and wider as an alternative for the battery. Supercapacitor and battery both have different strong points, and those strong points can complement each other. Even though there are a few cases where supercapacitors have already replaced batteries for some industries, generally it’s known that they cannot 100% substitute each other due to the difference in characteristics. Supercapacitors charge and discharge faster than batteries and have long life cycles. Supercapacitors have limited energy density when compared to batteries. In short, the supercapacitor exhibited unprecedented power density, while the batteries are characterized by superior energy density. Many battery and energy solution manufacturers have been trying to conquer this gap between batteries and supercapacitors. During the past 20 years, VINATech’s R&D team has been working on a hybrid solution that would take the best from batteries and supercapacitors. This project includes some battery components in combination with the supercapacitor structure. The result is the new VPC (VINA Pulse Capacitor, which is also known as Lithium-Ion Capacitor). This new hybrid solution has many specific features due to which it became a remarkable product on the world’s market of supercapacitors. In comparison to batteries, VPC (VINA Pulse Capacitor) has a higher rated voltage and wide operating temperature and can go through more than 20,000 charge-discharge cycles. VPC has very low leakage current characteristics and the ESR is very low when compared to Lithium-Ion Batteries. VPC combines the best features of supercapacitors and batteries since it is characterized by a relatively high energy density (advantage of batteries) and high power density (supercapacitors advantage). As one of the global leading supercapacitor manufacturers, VINATech has been a supplier for the top leading companies in various industries for a long time. This experience combined with the R&D team’s continuous efforts helped VINATech to collect the necessary data and insights about the most urgent needs of today’s supercapacitors market. VINATech’s R&D team has been working on new technological solutions which are aimed at revolutionizing the world and creating a more sustainable and eco-friendly future.

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2020-05-25

Hydrogen Economy Bright with More Tasks

Hydrogen Economy Global Study by Bloomberg In the case that clean Hydrogen Economy expands across the world, it is estimated that greenhouse gas emissions from various industries can be reduced by up to 34%, however, there should be an assumption that the government is willing to endorse and promote long-term policies to sustain Hydrogen Economy. Global study from Bloomberg NEF(BNEF) predicted to meet the 24% of final energy demand with clean Hydrogen Economy stating Paris Climate Agreement. Rising width of the curve for global temperature will be limited to 1.5-Celsius degrees and at the same time, 24% of the final energy can be sourced from clean hydrogen. Hydrogen Replace Fossil Fuel in Many Applications Hydrogen can replace the widely-used carbon-based fossil fuel in the applications of which renewable energy cannot work if the Hydrogen fuelling price achieves competitiveness. However, the carbon-producing cost of each country will reflect the local differences depending on the hydrogen storages and renewable energy resources development so that we can expect to reduce the cost by 20% to 25% in the United States, Brasil, Australia, Scandinavia, and the Middle East. In Korea and Japan which have geographical weakness of hydrogen storage, we can predict to increase the cost up to 50 % to 70%, and it is necessary to accept cross-country hydrogen transaction. Hydrogen can be one of the energy resources for a substitute of Coal, Oil and Gas, but still 99% of Hydrogen produced by coal fuel-based manufacturing method. Most of the Hydrogen has been reformed from natural gas while the production process discharges greenhouse gas and the related industries question the environmental friendliness of the Hydrogen Economy. If we hope to realize the environmental friendly Hydrogen Economy, it is very important to produce Hydrogen clearly with the renewable energy resources, in that way, huge amount of greenhouse gas discharge can be decreased and can be a way of dealing with climate change in the long term. Clean Hydrogen Potential to Become Next Energy Resource Clean Hydrogen can be obtained by electrolyzing water from the wind and solar power generation, and electrolyzer production and renewable energy power generation costs tend to gradually keep lower and lower, thus Clean Hydrogen production cost will be reduced down to USD 0.8 to 1.6 per 1 kilogram by 2050. It is the equivalent cost to USD 6 ~12/MMBtu of natural gas in the Brazillian, Chinese, Indian, Germany, and Scandinavian area, and it will be even more affordable than the method of Carbon Capture and Storage(CCS) which is the process of capturing carbon and storing hydrogen from natural gas and coal fuel. BNEF reports predict that CCS technologies will be applied better for the area of Chinese and Germany which is comparatively lack of places and lands for regenerative and renewable energy plant development, contrarily abundant of natural gas and coal fuel resources. Image : Hydrogen Economy Expansion Source : Quoted and Translated from H2News BNEF Hydrogen Economy Outlook VINATech Overview VINATech Co., Ltd has started hydrogen fuel cell components business from 2002, and VINATech manufactures the products with in-house developed catalyst support, catalyst and MEA for Hydrogen Fuel Cells such as PEM(Polymer Electrolyte Membrane) Fuel Cells and DM(Direct Methanol) Fuel Cells in VINATech's R&D Lab. VINATech's Hydrogen Fue Cell products ranges from Catalyst supports, Catalyst to Membrane Electrode Assembly(MEA) which can be used for stationary and transportation, such as automotive and various vehicles of fuel cells. Contact us FuelCell@vina.co.kr

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