The self-discharge rate is a key indicator of battery quality. In the field of energy storage, it often takes a long time from system integration to the official operation of the entire station, so its self-discharge rate performance is crucial to user applications.
Usually the factory state of the battery is between 20% and 50% SOC. The battery off the line is placed at 25°C for three months, and the self-discharge rate is required to be ≤1.5%/month in the first month, and ≤0.5%/month after 3 months.
For lithium iron phosphate (LiFePO4) batteries, it is generally recommended to charge them every 3 to 6 months if they are stored and not in use. This helps prevent the battery from over-discharging and getting damaged. If the battery is installed in a device and in regular use, you should follow the device's usage instructions and the Battery Management System (BMS) prompts for charging.
LiFePO4 batteries have good storage characteristics, but leaving them uncharged for an extended period can deplete their charge and affect their lifespan and performance. Therefore, periodic charging is essential to maintain the health of the battery.
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