In addition to its large capacity, supercapacitors also have various advantages, including the ability to instantly open and quickly charge, without the need for too complex charging circuits, and are therefore applied in multiple fields.

1. Public transportation/electric vehicles

Due to the use of special processes, the equivalent resistance of supercapacitors is very low, with large capacitance and low internal resistance. The composite power system composed of supercapacitors and other energy storage components combines the advantages of high specific energy of other energy storage components and high specific power of supercapacitors, which can better meet the requirements of electric vehicle starting and acceleration performance, and improve the efficiency of electric vehicle braking energy recovery. Increase driving range. At present, supercapacitors can form composite power systems with batteries, fuel cells, flywheel batteries, etc. The use of supercapacitor battery composite power supply systems in pure electric vehicles and hybrid electric vehicles will be one of the important directions for future development in the field of electric vehicles.

2. Wind power generation

Wind power generation is currently the fastest developing renewable energy generation technology. However, wind energy is a randomly changing energy source, and wind speed fluctuations can cause fluctuations in the output power of wind turbines, affecting the power quality of the power grid. Therefore, studying the output power regulation of grid connected wind farms has become an important issue in wind power generation technology. Additional energy storage devices can regulate reactive power, stabilize wind farm bus voltage, and regulate active power over a wide range, which is currently a research hotspot. With the development of manufacturing technology, the energy density of supercapacitors has greatly improved, and they have entered a commercial application stage in some short-term power energy storage applications. The use of supercapacitors to store energy and suppress wind power fluctuations in important frequency bands of wind farm output power has good application prospects.

3. Microgrid/Grid

In network operation, when the total power generation capacity is less than the total load demand and enters island operation due to external faults, secondary loads must be cut off to protect important loads. If the external fault is an instantaneous fault, the microgrid will quickly reconnect to the main network due to the disappearance of the instantaneous fault and restart the secondary loads. From the perspective of power supply stability and economy, it is unfavorable for secondary loads. Therefore, in the event of an external fault, supercapacitors can be used to provide short-term power shortages to the microgrid operating on islands, maintain all loads, and wait for fault repair.

4. Building/Elevator Energy Efficiency

The energy consumption of buildings in China accounts for about 28% of the total energy consumption in the country. The electricity consumption of elevators is second only to air conditioning and far higher than that of lighting, water supply, etc. The energy consumption of elevators has attracted high attention in the industry, so the energy-saving of elevators has very important practical significance. Therefore, researching and developing efficient motor drive systems is the key to energy conservation in elevators. Energy feedback energy-saving elevators have relatively mature technology, but due to their price factors and impact on the power grid, promotion still faces certain difficulties. The supercapacitor is directly connected to the DC bus to absorb feedback energy. The supercapacitor is directly connected to the DC bus of the frequency converter. Supercapacitors have excellent application effects and advantages in high-power electrical and electronic products, especially elevator products, and their application prospects are unlimited.

epilogue

In recent years, the technology of supercapacitors has developed rapidly, and their electrode materials have been continuously updated and iterated from activated carbon to new carbon nanomaterial systems such as carbon nanotubes and graphene; The structure of the device has continuously developed from the original symmetrical type towards asymmetric and hybrid systems such as batteries and capacitors; The form of devices has also shifted from rigidity and opacity to flexibility and transparency. Technology changes the future, and we believe that the emergence and development of supercapacitors will continue to innovate modern industrial technology and change the world we live in.