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汽车电瓶出现什么现象,表示电量过低,该充电啦

2019-3-4 10:13:42??????点击:
  汽车电瓶属于启动性蓄电池。通过铅与硫酸的化学反应,达到储(放)电能的物理作用。面板标注为xQWxxA/HxxxA,举例:6QW55A/H300A,既为:6节铅酸电池,电量55安/时,最大放电电流300安培。主要指标:电压:单位伏特(V)铅酸电池每单节(格)2,0伏特。充电终止电压2.17—2.2伏特,放电终止电压1.75伏特。电量单位为安/小时(A/H),常用多为40—70安/小时。以50安/时为例:以5安培电流持续放电,可连续放电10小时(也称十小时放电率)。
  最大放电电流:安培。直流电机启动瞬间电压降为0,电流无限大。常见300—400安培之间。冷车阻力大,放电(起动)电流大且时间长,热车阻力小,状态相反。充放电循?#21453;?#25968;,国际畅行标准多在8000—20000次之间。随着充放电次数增加,化学活性降低,各项指标降低,就离终止寿命不远了。电解液比重:以室温25度,满电为1.28,电压0时,比重1.0。温度升高,比重上升,温度降低比重降低。常见北方寒冷地区启动困难,与温度有直接关系。老司机将开水浇电池,就是这个道理。长时间不用,电解液上下比重不同产生电位差,即造成自放电。这就是为什么放时间长了,电池没电的原因。免维护电池面板上的圆?#28201;?#33394;标志,就是比重计观察窗,比重高时比重计上浮接近观察窗,绿色标示即明显。当比重底时,比重计远离观察窗,绿色标示逐渐变小?#26009;?#22833;,提示您:电量低,该充电了。
  充电电压:单位伏特。标准充电机充电终止电压17—18伏特,汽车发动机充电电压13—14伏特。为什么汽车的充电电压比充电机的底呢?汽车放电机经整流调压后,为车用电器使用,为保护电子器件,电压不能过高。这就造成电池电量不能充满,但能够满足启动需求,电量常在满电容量的百分之七十上下。我们的手机电池与汽车电池有很多相似,电量低于百分之二十就会关机,汽车电池也是如此。苦于没有电压(实电压)电量显示,能否启动就在一两次期待之间(误区:能启动就有电,就电量足),刚刚还能着车,现在就没电了,就是这个原因。
  免维护不等于不维护,经常观察比重观察窗,可以防止亏电。个人建议:每年入冬前进行一次充电机养护性充电,可避免亏电,并延长蓄电池寿命。?#27604;唬?#20859;护充电时能够进行放电(测试电量)检查更好!
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