What is the difference between a chemical battery and a Farad capacitor?

Supercapacitor battery is a kind of power supply element with special functionbetween traditional capacitors and batteries. Huge capacity. No chemical reaction occurs during this period, so it is classified as a physical battery.

The structure of supercapacitor is composed of porous electrode material with high specific surface area, current collector, porous battery separator and electrolyte. These materials may vary slightly due to manufacturer or specific application requirements. The commonality of all Farad capacitors is that they include a positive electrode, a negative electrode, and a separator between the two electrodes, and the electrolyte fills the two pores separated by the two electrodes and the separator. It can be repeatedly charged and discharged for hundreds of thousands of times (traditional chemical batteries only need hundreds to thousands of times), and its lifespan is much longer than that of chemical batteries. Secondly,supercapacitor manufacturers have extremely high power density during charging and discharging, and can instantly release a large amount of electric energy, which can meet the wider power needs of vehicles; At 65°C, it can work stably and normally (traditional batteries are generally -20°C to 60°C).

There are two defects in supercapacitors themselves: one is safety, too fast charging speed and high discharge efficiency make safety more difficult to control; the other is lower safety voltage, which limits its use in driving cars to lithium. The replacement of batteries is now only used in the start-stop system of automobiles and the field of pure super capacitor passenger cars.

As an energy storage system with large energy storage, fast charging and discharging speed, wide operating temperature range, safe and reliable operation, and no need for protection and maintenance, the supercapacitor module will gradually replace the battery with the development of supercapacitor technology. widen. In addition, supercapacitors are small in size, large in capacity (30-40 times larger than that of electrolytic capacitors of the same volume), short in charge and discharge time, simple in charging circuit requirements, no memory effect, protection-free, and sealable. Therefore, it is now mainly used in vehicle engine systems, military and a small number of public transport vehicles.