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手上一个老thinkpad笔记本,10年了,最近用提示建议更换电池,还能充电,只是充满后坚持不了多长时间。正好手上有18650电池,就想着自己换电芯。
结果在我动手之前,电池突然就自杀了,无电压输出。一顿操作后,把电芯和保护板拿出来了,万用表一量,电池有电啊,2并3串,6节电芯,电压有12.3v呢。
输出却为0,这什么情况。难道遇到传说中的保护板锁死???
这保护板上的保险,测量了下,也没有熔断啊。搞不懂了,那就死马当活马医吧。
看了下保护板,是BQ29330+BQ8030A的双芯片方案,之前也没搞过这个电池解锁,那就尝试下吧
二话不说,上某宝买了个usb转smbus的通信模块
就是这玩意,便宜,十几块包邮,那个什么ev2300啥的太贵了,享受不了。
连接好电池
又是一顿猛如虎的操作,最终的结果就是,芯片是被我复位了,但电池仍旧无输出,搞不懂什么情况了,有没有大神指点下。
这里我贴出复位前和复位后的数据。
上面两张是复位后,接上电脑,用自带的电源管理软件看到的信息,可以看到充电计数周期啥的都清零了,容量也被我回复到设计容量,初次使用日期也就是今天,电池电压也显示有12.3v,只是现在还没有换电芯,但是整个电池包是没有电压输出的
下面是另外的软件读取的信息和数据,先贴没有复位前的
这是复位前电池信息,可以看到每2节并联电芯的电压,有少许差异,输出电压0,工作电流0,
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
这个是复位前从BQ8030读出来的数据
这是复位后的电池信息,可以看到循环计数清零了,容量复位了,但输出电压仍旧零,
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
这是复位后,从BQ8030读出来的数据。
看到有几个坛友回帖询问详细复位解锁过程,这个我晚点会整理好发出来,因为现在mos管挂了,买的还在路上,我也没法判断电池到底是否成功解锁,或者说电池原本压根就没锁,怕误导大家,就先没发,等确认电池复活了,再发。
然后就是等待mos管这段时间,刚好手上还有个acer的电池,也是因为电池老化,没有输出了,至于是不是锁住,我不确定,大半年前就拆了,不过没工具,一致没动手,这次也一并尝试下,有结果就把acer电池的情况也发上来。
2021.05.21更新:
真是悲催,买的mos管还没到,中间这功夫尝试了另外块电池,结果大受打击。。。。
就是这货了,acer的4741系列笔记本用的电池,拆出来吃灰很久了,长时间没用,没输出,也不充电,就拆了,结果拆出来后不小心把那个镍带弄断了,等同于断电了吧,心想这下锁了,干脆就不换了,扔一边没理会了。这次搞那个thinkpad的电池,就把这货翻出来试试。
保护板,
拆下来,给个特写
背面特写,正反两面都可以看到接口引脚定义,不用去猜测尝试找scd和sck了,方便
BQ20Z955的主控,拍的不行,将就着看吧。
这个板子挺怪的,我除了拆出来断电放在那里比较久时间了,没动过它,这次想尝试,结果折腾2天,做了各种尝试,都无法和板子通信,无论上位机发啥过去,统统没任何响应。不知道咋回事。用可调电源搞个12v接到接口的vdd和gnd,结果就是直接烧保险。
这块骨头啃不动,算了,有知道怎么回事的吗。
补充内容 (2021-5-24 16:40):
2021.05.24:最新进展,换上买回来的mos管后,依旧无电压输出,实在不知道什么原因了,估计还是保护板有其他问题,因为不会无缘无故击穿mos管。
补充内容 (2021-5-24 16:42):
最终的结果呢,就是在我写入一个被我胡乱修改过的firmware后,芯片over了,再也没法通信了。。。。。
补充内容 (2021-5-26 09:03):
详细过程和工具软件发到下面帖子了:https://www.mydigit.cn/forum.php?mod=viewthread&tid=257147
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