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1. Storing Lithium-ion Batteries at the Appropriate Temperature

The typical temperature range for storing lithium-ion batteries in a household or storage unit is usually suitable for the safe storage of lithium batteries. The safe storage temperature range is quite wide, as shown in the following table.

Storage Duration Storage Temperature Range Storage Humidity Range
1 month -20°C to 45°C 65 ± 20% RH
3 months -20°C to 35°C 65 ± 20% RH
1 year -20°C to 25°C 65 ± 20% RH

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

2. Taking Precautions for Long-term Storage

Try not to store lithium batteries for too long without using them. If long-term storage (more than 6 months) cannot be avoided, the battery should be charged to 50% - 70% of its capacity, removed from the device, and stored in a dry and cool environment. The battery should be recharged every 3 months to prevent the battery from having too low a charge due to self-discharge during long storage periods, which may lead to irreversible capacity loss.

3. Adjusting the Humidity

The optimal humidity level for the safe storage of lithium-ion batteries is 65 ± 20% RH. When the humidity is too low, dew in the air may cause the battery terminals to rust, leading to short circuits or even fires. To reduce the humidity, desiccants can be used or the batteries can be stored in packaging.

4. Storing at the Optimal Charge Level

When a lithium-ion battery is fully charged, it operates at a higher voltage, which puts stress on the battery and shortens its overall lifespan. On the other hand, insufficient charging of the battery before storage may lead to deep discharge, causing severe damage. Lithium-ion batteries discharge more slowly when they are optimally partially charged, thus prolonging the battery's service life. Try to keep the battery charge level between 40% and 50% when storing.

5. Precautions for Storing Lithium Batteries

Lithium batteries should be stored in a dry and well-ventilated environment. Excessively high humidity may cause chemical reactions inside the battery, thereby damaging the battery's performance or even causing danger. Therefore, it is best to place lithium batteries in a place with a relative humidity lower than 80% and avoid exposing them to a humid environment.

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°C to 25°C. Within this temperature range, the self-discharge rate of the battery is relatively slow, which can effectively extend the battery's lifespan. If the temperature is too high or too low, the performance and lifespan of the battery will be affected. Therefore, when storing lithium batteries, they should be avoided from being exposed to extreme temperatures, such as being placed in a place with direct sunlight and high temperature or in a cold environment.

Lithium batteries should be kept away from fire sources and flammable materials. When lithium batteries are affected by external heat sources, they may experience thermal runaway and even cause a fire. Therefore, when storing lithium batteries, they should be kept away from open flames, high-temperature objects, and flammable items to ensure the safety of the storage environment.

Lithium batteries should avoid being subjected to severe physical impacts or vibrations. Due to the sensitivity of the chemicals inside lithium batteries, severe impacts or vibrations may cause damage to the battery, and even lead to leakage or explosion. Therefore, when storing lithium batteries, they should be placed in a fixed position to avoid being affected by external forces.

The storage time of lithium batteries also needs attention. Lithium batteries that have not been used for a long time may experience self-discharge, resulting in a decrease in battery power. Therefore, when storing lithium batteries, the battery power should be regularly checked and appropriate charging should be carried out to maintain its performance.

Attention should be paid to anti-theft and moisture-proof when storing lithium batteries. In some special occasions, such as long-term storage in warehouses or during sea transportation, lithium batteries may face the risks of being stolen or getting damp. Therefore, when storing lithium batteries, a safe and reliable storage location should be selected, and corresponding anti-theft and moisture-proof measures should be taken to ensure the safety and performance of the battery.

The storage environment requirements for lithium batteries include being dry and well-ventilated, having an appropriate temperature range, being kept away from fire sources and flammable materials, avoiding severe impacts or vibrations, paying attention to the storage time, and being anti-theft and moisture-proof. Only when these requirements are met can lithium batteries maintain good performance and safety. Therefore, when using and storing lithium batteries on a daily basis, we should pay special attention to these environmental requirements to ensure the normal operation and use of the battery.

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