Search found 7 matches

by zipoman
Nov 30 2019 4:46pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1275
Views: 151614

Re: bluetooth BMS?

JBD BMS I have question when unplugged charger and leave it isolated without connected to other components around 12 hours , the total pack voltage bleeding is 0.11 V (from 81.68V to 81.57V) Is this normal for this BMS ? 0.11 V it is normal voltage drop after unplug charger. When i charge li-ion to...
by zipoman
Nov 30 2019 4:42pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1275
Views: 151614

Re: bluetooth BMS?

Yes, it is possible change settings only with app. But i cant set max voltage 3,5V for LFP, min 3.65V - I must set this voltage by pc. For li-ion I think no problem with 4.1V max voltage, problem is low value.
by zipoman
Nov 14 2019 4:17am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1275
Views: 151614

Re: bluetooth BMS?

After balancing stop what is the cell voltage?
by zipoman
Nov 13 2019 4:18am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1275
Views: 151614

Re: bluetooth BMS?

Hi guys, you have a lot of experience with chinese BMS so I think you can give me some advice. I try some upgrade on 4S80A smart BMS, I use external fet and external resistor and now I can balancing without problem over 1A/cell. I try this upragede on 8S/12S and 16S version and I see one fault. Duri...
by zipoman
Apr 06 2018 9:09am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1275
Views: 151614

Re: bluetooth BMS?

I asked the seller for it and put it on the web.
https://www.aliexpress.com/item/4S-80A- ... 0.0.cgm0eP
by zipoman
Apr 06 2018 4:09am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1275
Views: 151614

Re: bluetooth BMS?

Pack in background is only test 12V battery (app 7Ah from defective assistant starting car box). Determining of BMS is 12V 100Ah LFP battery for boat motor. I carefully select the cells according to their capacity, the charging voltage is 3.5V/cell, discharging not exceed 3V. At the end of the charg...
by zipoman
Apr 06 2018 3:30am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1275
Views: 151614

Re: bluetooth BMS?

Hi, i have question for balancing current. I have 4s 80A BMS with bluetooth, but 50mA balance current is not too much. Chip is bq7692003, transistor for resistor SMD Y2, and bleeding resistor value 75ohm. I try 10ohm in paralel, slightly better, but still little. I would need to get around 1A, some ...