Detect and Prevent BMS Failures in EV Batteries

Cost Savings

Checklist Tasks

• Scan BMS for error codes before symptoms impact performance.
• Check voltage balance across modules to spot harmful imbalances.
• Review BMS temperature logs for spikes indicating sensor or thermal issues.
• Verify SOC readings by comparing BMS data to measured voltage under load.
• Inspect BMS wiring for corrosion or pinching to prevent failures.
• Test BMS isolation by simulating a fault to confirm system response.
• Examine current sensor calibration for correct charge/discharge tracking.
• Audit firmware version and update to fix bugs or vulnerabilities.
• Check for parasitic draw in BMS to avoid battery drain in storage.
• Review BMS-linked cooling system for proper temperature control.
• Inspect contactor logic for delays to prevent arcing or shutdowns.
• Document results and schedule follow-up maintenance as needed.