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1. Storing Lithium-ion Batteries at the Appropriate Temperature

The typical storage temperature range for 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 shortened battery life may occur. If you live in a place that is extremely cold or extremely hot, 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 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 it is unavoidable to store them for a long period (more than 6 months), 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 also be recharged every 3 months to prevent the battery from having too low a charge due to self-discharge during long storage periods, which could 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, resulting in a short circuit or even a fire. 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 partially charged to an optimal level, thus prolonging the battery's service life. When storing, strive to keep the battery charge level between 40% and 50%.

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 posing a danger. Therefore, it is best to place lithium batteries in a place where the relative humidity is less 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 slower, which can effectively prolong 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, avoid exposing them to extreme temperatures, such as avoiding placing lithium batteries 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. Lithium batteries may experience thermal runaway and even cause a fire when subjected to external heat sources. 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, or 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 duration of lithium batteries also requires attention. Lithium batteries that are not used for a long time may experience self-discharge, resulting in a reduction in battery charge. Therefore, when storing lithium batteries, the battery charge should be regularly checked and appropriately charged to maintain its performance.

The storage of lithium batteries should pay attention to theft prevention and moisture prevention. In some special situations, such as long-term storage in a warehouse 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 requirements for the storage environment of 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 duration, and taking precautions against theft and moisture. Only when these requirements are met can lithium batteries maintain good performance and safety. Therefore, in our daily use and storage of lithium batteries, we should pay special attention to these environmental requirements to ensure the normal operation and use of the battery.

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