Primary keywords: LiFePO4 cycle life, battery degradation, lithium battery lifespan
Secondary keywords: depth of discharge, capacity fade
Introduction
One of the biggest advantages of LiFePO₄ batteries is their exceptional lifespan.
1. Typical Cycle Life Performance
- 80% DOD: 4,000–6,000 cycles
- 50% DOD: 7,000–10,000 cycles
2. Main Degradation Mechanisms
- SEI layer thickening
- Loss of active lithium
- Electrode micro-cracking
- Electrolyte oxidation
3. Impact of Temperature
High temperature accelerates:
- Electrolyte decomposition
- Cathode structural stress
4. Impact of Charge Voltage
Overcharging above 3.65 V/cell dramatically increases aging rate.
5. Best Practices to Maximize Lifespan
- Limit DOD to 70–80%
- Avoid high-temperature storage
- Use proper charge voltages
Conclusion
With proper system design and operating conditions, LiFePO₄ batteries can last 10–15 years or more.