Help Identifying Parts of a Battery Management Board
A= 100A current reg.
B=12S protection cct.
C= balancers. 

Applicable for 

43V    (3.6V * 12S) lithium battery &amp; packs
44V    (3.7V * 12S) lithium battery &amp; packs
50.4V (4.2V * 12S) lithium battery &amp; packs
Lithium battery (Li-ion)
Prismatic Lithium Polymer battery (Li-Po)
 
Technical Parameters:
Balanced current: 60mA (VCELL = 3.90V when)
Balanced for: 4.20 ± 0.05 V
Over-charged Protection: 4.2 ± 0.05 V
Over-charged Release: 4.05 ± 0.05 V
Over-discharged Protection: 2.9 ± 0.05 V
Over-charged delay: 5mS
Over-current Protecton: 100 A
Supports Max. Continuing Discharge Current: 100A
Static power consumption: less than 200uA
Short-circuit protection function: disconnect the load from the recovery.
 
Dimension: 200mm * 110mm * 20mm (L*W*T) - with Radiating Board
 
The main functions: Over-charged, Over-discharged protection, short circuit protection, over-current protection, with Balancing function.