Are those two BMS fully interchangeable?

A..dam

1 W
Joined
Apr 24, 2015
Messages
56
Location
ottawa, ontario
save of course for USB output...
https://bmsbattery.com/bmspcm/391-10s-lithium-ion-bms-for-bottle-battery-case-bms-pcm.html
has PCM-L10S15-923 (A)+(B)
https://bmsbattery.com/bmspcm/718-10s-lithium-bms-system-for-bottle-battery-with-5v-bms-pcm.html
has PCM-L10S15-923 (A)+(C)

#1. I have checked electrical specification of #718 and #391 on the BMSB website and parameters are IDENTICAL.
#2. BOTH #718 and #391 have the same bottom board # PCM-L10S15-923 (A) so connection from battery to the PCM are IDENTICAL
#3. I looked at the bottle battery which takes #391
https://bmsbattery.com/ebike-battery/734-36v116ah-bottle-ebike-battery-pack-with-charger-battery.html
I looked at the bottle battery with USB it takes #718
https://bmsbattery.com/ebike-battery/676-36v116ah-right-off-bottle-panasonic-battery-pack-battery.html
BOTH bottles have the same dimensions and look very similar so there should be a space for a slightly taller circuit of #718 in bottle which takes #391.

Thanks for feedback...
A..dam
 
think this should work..

i have such a board, but charging does not work anymore. the charge fet only gets 1.4V at the gate. strange. Any ideas how to solve this? The Layout sucks, i cannot see where this charge fet gate lane leads to

thought it might be the FET and swapped it. that didnt help, 1.4V at the gate are just not enough :evil:
 

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