Help: is my lifepo4 battery dead?

[luvxu]

ok, it is official. My battery is truly dead. I was able to remove it from the aluminum casing and found that it had exploded. The smell of it was so bad that my wife quickly banished me to the garage. The BMS is totally burned. I just don't know what could have happened???

BTW, the brand name of this battery is TEHAO.

[SamTexas]

Wow! Are you sure it's LiFePo4 battery? Could it be LiCo or LiMn?

Never mind. I just looked at the link you provided in the first post. That's strange though. I thought LiFePo4 is a safe chemistry.

[dnmun]

ok, you answered your own question. you did ok. the BMS and the case may be useful for parts. it will be landfill gas next.

[dogman]

Wow. We can say now that it's dead allright. Puffed cells like that are toast. Too bad. Saving the bms might not be worth it,if a bms malfuntion lead to the battery death. It may have been allowing you to overdischarge it for example. I wouldn't know how to test the bms myself.

It was safe, it never burst into flames despite obvious damage. When I killed a 36v 20 ah lifepo4 with overdischarge, it also did not light my garage on fire, or even melt the tape on the battery. All it did was swell up like mad. In my case, I left a battery connected to a controller that was turned on, and went off to have west nile virus for two weeks. When the fever broke, I went to ride the bike and found the battery murdered. Presumably my bms low voltage cutoff did not work to save the battery.