4S PCB/PCM- Keeppower WYY-EBD02-AB (Protection Electronics)
BMS (Battery Management System) – PCB Protection Circuit for Four Li-Ion Battery Cells (Made in Japan). A Battery Management System (BMS) is an electronic circuit used to monitor and control a rechargeable battery, i.e. a accumulator system is used. The necessity of a BMS arises when several accumulator cells are interconnected to form a battery. The BMS is intended to detect, monitor and adjust the unavoidable production-related variations of various parameters of the accumulator cells, such as capacity and leakage currents.
Application: Li-ion battery packs
No balance function!
Note: After soldering the protection circuit in the battery pack must be activated, this is done by a short charging by the electronics.
Wiring diagram:
You can view the data sheet here:< click here >
Technical Data
| Model | WYY-EBD02-AB |
| Overcharge protection (VCU) | 4.275V ± 0.05V . |
| Overcharge delay time | 1000ms ± 500ms |
| Overcharge release voltage | 4.075V ± 0.05V |
| Deep discharge protection (VDD) | 2.30V ± 0.08V |
| Under discharge delay time | 100ms ± 50ms |
| Under discharge trigger voltage | 2.70V ± 0.1V |
| Overcurrent protection (IEC) | 26A ± 2A |
| Total PCB resistance | max. 45mΩ |
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