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为什么蓄电池能蓄电?

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为什么蓄电池能蓄电?

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zuo二次电池。蓄电池并非直接能储藏电,因为电是电子的定向liu动,而大量的电子是无法像普通wu件一般储存在仓库里的。蓄电池之所以能"蓄电",是把外界的电能用来促使电池内bu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bu又进行逆向的化学反应,把储存的化学能转变为电能。这zhong可逆的变化可反复多次进行,蓄电池也就可以反复充电使用了。蓄电池的zhong类很多,较常见的是铅蓄电池,它常常用在汽车上。目前在通信、家电上用得较多的是小型的全封闭蓄电池,如镍镉电池、镍氢电池、锂电池等。

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