Supercapacitors, also known as double-layer capacitors or electrochemical capacitors, are a type of energy storage device that lies between traditional capacitors and chemical batteries, with the following characteristics:
High power density (fast charging and discharging)
Ultra-long cycle life (up to one million cycles)
Good low-temperature performance
Low energy density (compared to batteries)
In battery systems, supercapacitors are usually used for:
Auxiliary starting: supporting the instantaneous high current start-up of electric vehicles
Brake energy recovery: quickly absorbing and releasing energy to improve system efficiency
Extending battery life: mitigating the load impact on the main battery and reducing its aging speed
