Explain the characteristics of super capacitor

Source: 2020 - 03 - 28 15:07 hits: the characteristics of super capacitor ( 1) High charge and discharge rate of super capacitors with high power density, can in a short period of time several hundred to several thousand amperes of current, charging speed, can be in a few seconds to a few minutes to complete the process. Super capacitance bus and tram to use this feature, finished in a short time charging and drive the vehicle. ( 2) Long cycle life super capacitor loss in the process of charging and discharging is very small, so in theory the cycle life is infinite. In practice, can reach more than 100000 times, 10 to 100 times that of the battery. ( 3) Function better most of the charge transfer at low temperature for the process of charging and discharging of capacitor active substance on the surface of the electrode, so little ability to weaken, the temperature, in general, the lithium ion battery capacity attenuation volatility low temperature as high as 70%. ( 4) Low energy density of super capacitor is a bottleneck of their low energy density, only 1/20 of the lithium ion battery, or about 10 wh/kg. As a result, it can't be as main power source of electric cars, much as the auxiliary power, mainly used for quick start and brake energy recovery equipment.