this is a professional Li-ion BMS made for us from the highest quality components by one of the leading designers and manufacturers of this type of product, not a factory second or other cheaply made item sometimes advertised on some shopping sites,
DESIGNED FOR USE WHERE SPACE IS LIMITED only 60mm X 33mm X 6.7mm
PCM Specifications For 48.1V （13S）Li-ion Battery Packs
Model:LWS-13S15A-370(13S) Separate Port
No. Test item Criterion
1 Voltage
Charging voltage DC：54.6V±0.05V CC/CV
Balance voltage for single cell
2 Current
Balance current for single cell
Current consumption ≤50uA
Maximal continuous charging current ≤5A
Maximal continuous Discharging current ≤20A
3 Over charge Protection
Over charge detection voltage for single cell 4.25±0.025V
Over charge detection delay time 0.5S—2S
Over charge release voltage for single cell 4.15±0.05V
4 Over discharge protection
Over discharge detection voltage for single cell 2.80±0.08V
Over discharge detection delay time 2000mS—3000mS
Over discharge release voltage for single cell 3.0±0.062V
5 Over current protection
Over current detection voltage 0.10±0.02V
Over current detection current 80±10A
Over charge current detection current 15±5A
Detection delay time 150-250mS
Release condition cut load auto recovery
6 Short protection
Detection condition Exterior short circuit
Detection delay time 200-500us
Release condition Cut load
7 Resistance Protection circuitry（MOSFET） ≤20mΩ
8 Temperature
Operating Temperature Range -20～+70℃
Storage Temperature Range -40～+125℃
Temperature Switch （ＮＴＣ） NTC
With ON/OFF Switch wire
The photos is for wiring reference only, please refer to the actual products
Separate Port for charging and discharging