锂离子电池过充过放造成的影响:较具竞争力企业,{新能源试验设备},**国内外!
过充电容易导致锂离子电池中的电解液分解释放出气体 电池过充过放测试柜机箱,从而导致电池鼓胀,严重的话甚至会冒烟起火;过放会导致电池正极材料分子结构损坏,从而导致充不进去电。手机或**充电器中一般都有电池管理芯片,当电池充到(或放电达到)一定程度达到厂家设定值时会终止充电(或放电),从而防止过充或过放,但这只是理论上的功能。事实上不同厂商的管理芯片功能不一样 大型电池过充过放测试柜机箱,未必能达到理想状态。所以有时候我们在手机已经掉电关机的状态下依然强制开机,会发现电池充不进去电了或使用时间变短了。因此,要坚持浅充浅放的原则。成品锂离子电池内置保护板,只要功能正常,是不会过充过放的,因为内部的PCM会保护。只有cell,及没带保护装置的电芯才会被过充。当然,不解刨电芯,只能测量电芯电压,静态电压**4.25V即为过充,低于2.30V即为过放。解剖电芯观察负极片表面,看是否有锂析出/或者有铜析出来判断。
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