Define the master and slave control scope
High voltage BMS hardware is not a complete battery pack. A functioning rack normally needs the correct master control box, slave monitoring boxes, sensors, contactors, pre-charge components, protection devices, wiring, PCS interface, and commissioning settings.
- Confirm total series cell count, rack voltage range, module count, and BMU channel requirements.
- Confirm continuous current, peak current, contactor selection, and pre-charge logic.
- Confirm PCS or EMS protocol, message format, baud rate, and fault handling requirements.
Choose 100A or 200A from the electrical design
Current class should follow the project power requirement, battery module design, conductor rating, contactor rating, thermal condition, and operating schedule. A higher current option is not automatically better if the rest of the system is not designed for it.
Information to send before purchase
For a faster review, prepare a one-line diagram, rack voltage range, module arrangement, cell count, PCS model, required communication protocol, operating current, peak current, destination country, and any required compliance documentation.
