Cycle Life Testing

Overview

Our Cycle Life Testing program subjects batteries to rigorous charge/discharge cycling to verify real-world lifespan claims. Every battery model undergoes thousands of cycles under controlled conditions to ensure our products deliver the promised 5-10 year service life in the field.

Testing Protocol

1. Initial Characterization: Full capacity measurement at 0.2C discharge rate
2. Standard Cycling: 1C charge to 3.65V, rest, 1C discharge to 2.5V — repeated continuously
3. Periodic Assessment: Every 100 cycles, full capacity check at 0.2C
4. End-of-Life Criteria: Capacity retention <80% of rated capacity
5. Temperature Monitoring: Continuous recording at 25°C ± 2°C ambient

Test Equipment

• Multi-channel battery analyzers (Arbin BT-2000, Neware BTS-4000)
• Environmental chambers (Espec, -40°C to +150°C)
• Precision impedance measurement (Hioki BT3562)
• Thermal imaging cameras for hot-spot detection

Test Results — LiFePO4 Battery

Quality Standards

• IEC 62660-1: Performance testing of Li-ion cells
• UN 38.3: Transportation safety testing
• GB/T 31484-2015: Cycle life requirements for EV batteries