Re: [EVDL] Suspicious calb cell

2018-02-10 Thread Lee Hart via EV
George Tyler via EV wrote: Sounds reasonable, but surely the charge current is much less than the discharge, so voltage drop on discharge will triggrer low charge cutoff for the pack long before this becomes an issue with charging? I have had problems with high self discharge on headway cells, st

Re: [EVDL] Suspicious calb cell

2018-02-09 Thread George Tyler via EV
Sounds reasonable, but surely the charge current is much less than the discharge, so voltage drop on discharge will triggrer low charge cutoff for the pack long before this becomes an issue with charging? I have had problems with high self discharge on headway cells, still within spec of 5% per

[EVDL] Suspicious calb cell

2018-02-07 Thread Steve Clunn via EV
I've seen this a few times and not had any luck with warranting cells from the company. One thing I have not seen mentioned that I believe might be happening is that as these batteries get a little age on them and their internal resistance goes up when they are charging their BMS starts shunting cu