With the popularization of electric vehicles and portable electronic devices, lithium batteries have become an indispensable source of energy in our daily life. However, when using lithium batteries in low temperature environment, many users have misunderstandings about their performance and usage. This article will reveal five common misunderstandings about low-temperature lithium batteries to help users better understand and use lithium batteries.

1. Lithium battery cannot be charged at low temperature

many users believe that lithium batteries cannot be charged at all in low temperature environment. In fact, this statement is not completely accurate. Although the charging efficiency of lithium batteries at low temperature will indeed decrease and may even lead to charging failure, it does not mean that they cannot be charged under all low temperature conditions.

At lower temperatures (for example, below 0°C), the chemical reaction rate of lithium batteries slows down, resulting in unstable charging process. If charging at extremely low temperature, it may lead to the deposition of lithium inside the lithium battery, forming lithium crystals, thus damaging the battery. Therefore, the best practice is to charge in a suitable temperature range, and it is usually recommended to charge between 0°C and 45°C to ensure the safety and life of the battery.

2. The decrease of lithium battery capacity at low temperature is irreversible.

Another common misconception is that users think that the decrease of lithium battery capacity at low temperature is irreversible. In fact, lithium batteries show capacity attenuation due to the decrease of chemical reaction rate in low temperature environment, but this does not mean that the batteries permanently lose these capacities.

When the lithium battery returns to normal temperature, the capacity usually returns to near normal level. This is because the internal chemical reaction of the battery is limited at low temperature, and once the temperature rises, the chemical reaction of the battery will return to normal. Therefore, users do not have to worry too much about the impact of low temperature on the battery capacity, as long as they avoid using the battery at extremely low temperature for a long time, the capacity can generally be restored.

3. The use of lithium batteries at low temperature has no effect

many users mistakenly believe that the low temperature environment has no effect on the use of lithium batteries. In fact, low temperature does affect the performance of lithium batteries, including capacity, discharge rate and charging efficiency. In low temperature environment, the internal resistance of lithium battery increases, resulting in the decrease of discharge capacity, and users will find that battery service life is significantly reduced.

In addition, low temperature may also lead to an increase in the self-discharge rate of the battery, thus reducing the overall service life of the battery. Therefore, in cold weather, users should try their best to avoid exposing lithium batteries to low temperature environment for a long time, and consider providing additional insulation measures for the batteries.

4. The battery will be damaged by itself at low temperature

another common misconception is that users think that lithium batteries will be damaged by themselves in low temperature environment. Although low temperature does affect the performance of the battery, the design of lithium battery can usually withstand certain low temperature conditions.

5. Heating during charging can solve the problem of low temperature

many users think that when charging at low temperature, the problem can be solved by heating the battery. This approach seems reasonable, but in fact there may be security risks. When the lithium battery is heated, if the temperature is not properly controlled, it may cause the battery to overheat, cause safety problems, and even cause battery damage or fire.

If it must be charged in a low temperature environment, the safest way is battery placed at room temperature or using specially designed battery heating systems, these systems usually control the temperature to ensure safety. In addition, when charging, try to avoid using unqualified Chargers to avoid battery failure.

Understanding the common misunderstandings of lithium batteries in low temperature environment is very important for users to correctly use and maintain batteries. By eliminating these misunderstandings, users can better protect lithium batteries and ensure their performance and service life. Following the manufacturer's guidelines and reasonably choosing the charging and using environment will help to use lithium batteries safely and effectively under low temperature conditions.