Industry
Battery Management System (BMS) Boards
BMS boards sit between high-energy cells and the rest of the system. Isolation barriers, cell voltage measurement accuracy, and firmware that forms part of the safety case are not negotiable. Production has to deliver per-unit hipot records, calibration data, and connector assembly to spec on every unit.
Buyer pains we hear most
- Per-unit hipot on the isolation barrier requires a defined test fixture and pass criteria aligned to the safety case
- Cell voltage measurement calibration drift between ICs causes balancing errors over battery lifetime
- Firmware is part of the functional safety case and version traceability must follow the board into the field
- Connector and busbar torque field failures trace to uncontrolled assembly processes
Typical product traits
- Cell monitoring IC (LTC68xx, BQ769xx, or ISL94xxx series) with isolated daisy-chain communication
- Active or passive cell balancing with per-cell monitoring
- High-current shunt or Hall-effect sensor for pack current measurement
- CAN or RS-485 communication with galvanic isolation
Regulatory environment
Stationary lithium battery safety
IEC 62619
Portable lithium secondary cells
IEC 62133-2
Functional safety (general)
IEC 61508 (SIL)
Industrial EMC
IEC 61326-1
Test plan considerations
- Per-unit hipot test across the isolation barrier to the voltage specified in the safety case
- Per-unit cell voltage measurement calibration check and deviation record
- Firmware version verification and traceability record per board serial number
- Connector and busbar mechanical torque and pull-force sample test per batch
Frequently asked questions
Do we need a written test plan?
Yes. A production test plan defines pass and fail criteria, FCT vectors, calibration steps, and serialization rules. We help draft one if your team has not written one yet, based on your firmware behavior and target field performance.
Can you load and provision firmware in production?
Yes. In-line firmware loading during functional test and offline programming via dedicated fixtures. We support SWD, JTAG, UART, and USB-DFU interfaces, multi-image programming (bootloader, application, file system), and signed bootloader chains.
Do you support RoHS and REACH compliance?
Yes. We work with RoHS-compliant component selection and SAC305 lead-free solder by default. REACH substance documentation comes from supplier declarations forwarded with each batch.
Quote battery management system (bms) boards
Send your product files and a short description. We respond within one business day.