其原理为将交流不稳定的市电经整流滤波，变为直流电，并转化为化学能存储于蓄电池，用户使用的是蓄电池直流电逆变后的工频交流电。
The principle is AC unstable electricity changed by the rectifier filter into the direct current , and then transformed into chemical energy stored in storage battery . The user used is alternating current .
市电整流