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有些电池能反复充电、放电,人们把这类电池称作蓄电池,又叫做二次电池。蓄电池并非能直接储藏电,因为电是电子的定向流动,而大量的电子是无法像普通物件一般储存在仓库里的。蓄电池之所以能蓄电,是利用外界的电能促使电池内部发生化学反应,把电能转换成化学能储存起来;使用电池时,电池内部又进行逆向化学反应,把储存的化学能转变为电能。这种可逆的变化可反复多次进行,蓄电池
Some batteries can be repeatedly charged and discharged, people call these batteries as batteries, also known as secondary batteries. Batteries are not capable of storing electricity directly, because electricity is a directional flow of electrons and a large number of electrons can not be stored in warehouses like ordinary items. The reason why the battery can accumulate electricity is to utilize the external electric energy to cause the chemical reaction inside the battery to convert the electric energy into chemical energy to be stored. When the battery is used, the battery carries out the reverse chemical reaction to convert the stored chemical energy into electric energy. This reversible change can be repeated several times, the battery