The Optimal Storage Temperature And Humidity For Lithium Batteries

1. Storing lithium-ion batteries at the appropriate temperature

The typical storage temperature range for lithium-ion batteries in households or storage units is usually safe for storing lithium batteries. The safe storage temperature range is quite wide, as shown in the following table.

However, in extreme weather conditions, problems such as shortened battery life may occur. If you live in a very cold or very hot area, please avoid storing lithium-ion batteries in outdoor sheds without taking appropriate precautions (such as using additional insulation materials, heating pads or cooling devices). These types of temperature fluctuations can cause the battery to expand and contract, resulting in reduced battery capacity and potential damage.

2. Implement long-term storage prevention measures

Try to avoid keeping lithium batteries for too long without using them. If it is unavoidable to store them for a long time (more than 6 months), charge them to 50%-70% of their capacity, remove them from the instrument and store them in a dry and cool environment. Charge the batteries once every 3 months to prevent the batteries from losing capacity irreversibly due to self-discharge over an extended period of storage.

3. Adjusting Humidity

The optimal humidity level for safely storing lithium-ion batteries is 65 ± 20% RH. When the humidity is too low, moisture in the air can cause rust on the battery terminals, leading to short circuits or even fires. To reduce humidity, you can use desiccants or store the batteries in their packaging.

4. Optimal Power Storage

When a lithium-ion battery is fully charged, it operates at a higher voltage, which puts pressure on the battery and shortens its overall lifespan. On the other hand, insufficient charging before storage may lead to deep discharge, causing severe damage. When lithium-ion batteries are charged to the optimal level, their discharge rate is slower, thereby extending the battery's lifespan. It is recommended to keep the battery's charge level between 40% and 50% during storage.

5. Safety Tips for Lithium Battery Storage

Lithium batteries should be stored in a dry and well-ventilated environment. Excessive humidity may cause chemical reactions inside the batteries, which could damage their performance and even pose risks. Therefore, it is best to keep lithium batteries in a place with a relative humidity of less than 80%, and avoid exposing them to damp conditions.

The storage temperature of lithium batteries should be within a certain range. Generally speaking, the optimal storage temperature range for lithium batteries is from 0℃ to 25℃. Within this temperature range, the self-discharge rate of the batteries is slower, which can effectively extend the battery's lifespan. If the temperature is too high or too low, the performance and lifespan of the batteries will be affected. Therefore, when storing lithium batteries, it is necessary to avoid exposing them to extreme temperatures, such as avoiding placing the batteries in areas with direct sunlight or in cold environments.

Lithium batteries should be kept away from fire sources and flammable materials. When exposed to external heat sources, lithium batteries may experience thermal runaway and even cause fires. Therefore, when storing lithium batteries, they should be kept far away from open flames, hot objects and flammable items to ensure the safety of the storage environment.