台铃电动车48V20A超威电池，为什么充电器是48V3A的？
推荐回答（5个）
首先解释一下48V20A的中的"A"其实应该是"AH"，读“安时”，是计量电池的容量的，为了简单，大都写成了"A"，且读成“安”了，其实都是不规范的，而充电器上的"A"，则是电流单位，才真正读作“安”。48V20AH电池的充电电流是3A没错。
至于补充说雅迪充电器上标的是48V20A，那是后来贴上去的一个小标签吧，那是为了方便直观，你仔细找，上面也有写3A的，因为普通用户毕竟不知道48V20AH电池应该使用3A电流的充电器，比如说楼主你啦，呵呵。。。
是对的，充电器的型号有些是以充电电压与最大电流来标识的。
电池组48V20AH，2小时率额定容量为20AH，单位是安时，而不是安。
48V3A的充电器，3A为充电时的最大电流值，单位是安。
48V20AH电池组的充电器参数如下：
第一阶段是恒流限压，电流值最大为3A，限压值为59.2V；
第二阶段是恒压限流，至电流降至跳灯电流值转下一步，恒压59.2V限流3A，至电流降至0.55A跳灯；
第三阶段是涓流浮充，也称保养充电，浮充电压限55.2流0.55A，此阶段一般2~3小时后断电即可。
充电器的型号标注应该是电压加电流，所以48V3A是对的。有的标注48V20AH是指该充电器所适用的电池型号。额定输出48V3A的充电器，充48V20AH电池正好合适~因为常规电动车用户都是晚上充电，在电池和充电器都无故障前提下，3A电流连续充电7小时，能充进大约20AH电量，正好将电池完全充满。
3A是充电器的额定充电电流，48V20A的电池充电电流是在3A以内。商家没给错，请放心使用.更多电动车问题请访问台铃官网http://www.tailg.com.cn
可以肯定是充电器不匹配,,充电器和电池的关系:充电器的最高电压过高,使电池超过自身的承受能力,转换电流过低,延长了充电时间,会造成电池的变形,反之,则造成电池的欠充,引起里程不足,长时间欠充,会引起电池的硫化,缩短电池的使用寿命.兄弟你那个卖车的人坑你啊.那个充电器不能长时间用.
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