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　　Now the vast majority of electric vehicles filled with lead-acid batteries, lead-acid batteries because of low cost and high cost. This unique battery is used for a period of time when the battery voltage drops, it can give it to reverse current through the battery voltage rises. Because the battery can be charged and can be used repeatedly, so called. "Category can be electric bike lead-acid batteries used in the following four power battery that VRLA maintenance-free batteries, gel lead-acid batteries, nickel metal hydride batteries and lithium ion batteries.

Working principle of the electric bicycle lithium batteries
　　Lead-acid battery charging and discharging process is the process of electrochemical reaction, charging, lead sulfate to form lead oxide, discharging lead oxide and reduction of lead sulfate. And lead sulfate is a kind of very easy to crystalline substance, when the battery in the electrolytic solution of high concentration of lead sulfate or static idle time is too long, will be "into" ball, forming a small crystal, these small lead sulfate crystals to attract around, like snowball into larger inert crystal, crystal after charging of lead sulfate not only can't back into lead oxide, attached to the plate electrode will precipitate, cause the loss of the electrode plates work area, this phenomenon is called sulfide, is often said that aging. When the battery capacity will gradually decline, until can't use.
Working principle of the electric bicycle lithium batteries
　　Lead-acid battery charging and discharging process is the process of electrochemical reaction, charging, lead sulfate to form lead oxide, discharging lead oxide and reduction of lead sulfate. And lead sulfate is a kind of very easy to crystalline substance, when the battery in the electrolytic solution of high concentration of lead sulfate or static idle time is too long, will be "into" ball, forming a small crystal, these small lead sulfate crystals to attract around, like snowball into larger inert crystal, crystal after charging of lead sulfate not only can't back into lead oxide, attached to the plate electrode will precipitate, cause the loss of the electrode plates work area, this phenomenon is called sulfide, is often said that aging. When the battery capacity will gradually decline, until can't use.