A Comprehensive Guide on How to Store LiFePO4 Batteries

There is a common misconception that batteries retain their power indefinitely when not in use. However, this is not true. Even in idle conditions, batteries undergo self-discharge, necessitating proper storage to mitigate the impact on battery performance and lifespan. Storage requirements and precautions for lithium iron phosphate batteries vary among manufacturers. As a professional lithium iron phosphate battery manufacturer, this article aims to delve into the best practices for storage, offering insights to enhance readers’ understanding.

Key Considerations for Lithium Iron Phosphate Battery Storage:

1. Disconnect the battery switch when not in use and store the battery in a dry, cool place. (Disconnecting the switch entails separating the [+] and [-] wires from the battery terminals.)
2. Ensure the lithium iron phosphate battery operates within specified temperature ranges: charging temperature of 0°C to 45°C and discharge temperature of -20°C to 60°C.
3. Avoid contact between the batteries and metallic objects to prevent short circuits, which could damage the battery or pose a safety risks.
4. Handle the batteries with care, refraining from impact, puncture, exposure to excessive heat, or modification. Avoid placing the batteries in direct sunlight or in high-voltage environments.
5. Use an approved charger specifically designed for lithium iron phosphate batteries. Avoid inferior or incompatible chargers to prevent damage.

Short-Term Storage Guidelines:

Store lithium iron phosphate batteries in a dry, cool environment and away from conductive materials. When disconnecting the battery, it’s advisable to charge it using a compatible charger to at least 50% of its maximum capacity. This ensures optimal performance upon reconnection and helps preserve the battery health.

Long-Term Storage Guidelines:

Even during extended storage periods without external connections, lithium iron phosphate batteries undergo internal chemical reactions, leading to self-discharge and gradual power depletion. High temperatures exacerbate this process. To mitigate these effects, store the batteries within the manufacturer’s recommended temperature range, typically at room temperature, with a charge level between 40% and 60%. Charge the battery every three months to prevent complete discharge, which could cause irreversible damage.

In conclusion, proper storage of lithium iron phosphate batteries involves maintaining a charge level of 40%-60%, disconnecting the battery from devices, and adhering to recommended temperature ranges. For storage exceeding three months, periodic charging every three months is essential to preserve the battery condition.