Heat accelerates degradation and poses safety risks, even for stable LiFePO4 chemistry. To monitor thermal behavior:
- Attach a temperature probe to the cell can during capacity tests. Moderate temperature rise indicates safe operation; rapid warming suggests issues like poor contact or high internal resistance.
- Use thermal sensors in packs, adhered firmly to representative cells, and log data to detect anomalies.
- Avoid high currents or deep discharges in hot environments, as these shrink LiFePO4’s cycle-life advantage.
Proactive measures include ensuring proper busbar contact, torque specifications, and ventilation in enclosures to dissipate heat.
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