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Why should lithium batteries pay attention to fire prevention?

Posted on 2022-09-26

Many people may be familiar with lithium batteries from mobile phones. In fact, it is used in many home appliances. Undoubtedly, the advantages of lithium batteries such as light weight are making them popular and applied. However, did you know that if you use it carelessly, it will also make you "fire"?

Lithium batteries have the advantages of light weight and low temperature resistance (-40°C). Lithium batteries with a thickness of 0.3mm and the size of a postage stamp can be used continuously for more than 5 years. In recent years, the current alkaline dry batteries and manganese batteries are being phased out. in many home appliances and cell phones.

Lithium-ion batteries are different from the existing manganese batteries and alkaline dry batteries, which are zinc chloride and potassium hydroxide aqueous electrolytes, which use organic solvents. The positive electrode of lithium battery is made of manganese dioxide, lead fluoride, sulfurous chloride and other materials. Compared with zinc chloride used in general battery negative electrodes, the lithium metal foil used in the negative electrode has a strong ionization tendency and a large voltage difference between the positive and negative electrodes, which improves the working efficiency of the lithium battery.

However, the power battery often generates heat and combustion during use, which may affect the use of the host in the light, or burn the host and cause a fire in the severe case. According to reports, there have been many domestic fire accidents caused by the heating and burning of lithium batteries in Japan in recent years.

So why do lithium batteries get hot and burn? After many materials in the original lithium battery come into contact with water, a violent chemical reaction can occur and a large amount of heat energy is released, resulting in heat generation and combustion. The manganese dioxide of the positive electrode of the lithium battery can generate heat with only a small drop of water. After the sulfurous chloride in the lithium battery comes into contact with water, it releases heat energy while generating hydrochloric acid and sulfur dioxide. Several factors make the lithium battery a "tinder" in life. Therefore, people must pay attention to waterproof and prevent damp. After all kinds of hosts are out of use, the lithium battery should be removed and stored in a dry and low temperature place to prevent the occurrence of household fire accidents caused by improper use of lithium batteries.

Wuxi Jiyi New Energy Technology Co., Ltd. is a manufacturer engaged in the customization of household energy storage batteries for industrial equipment. Communication is online at any time, and we do our best to meet customer needs. Every link is strictly checked and the quality is guaranteed.