Do you know the factors affecting the safety of lithium batteries

With the popularization of new energy vehicles, people's demand for power lithium batteries is growing. However, there have been frequent incidents of fire in new energy vehicles in the recent past. The investigation results show that most of them are related to Hedongli batteries. Therefore, the safety of power lithium batteries has become a hot topic for people to discuss.

There are many factors that affect the safety of lithium batteries. Battery materials have an important impact on the safety of lithium batteries because battery materials are generally thermally active. When the temperature of the battery continues to rise, many thermal reactions will be carried out internally. When heat can not be lost in time, it is easy to cause battery safety accidents. Therefore, the choice of positive and negative electrode materials for lithium batteries has an important impact on battery safety performance.

Secondly, the manufacturing process of the battery is also an important factor that affects the safety performance of the battery. The most important three factors are the ratio of positive and negative pole capacity, the uniformity control of the slurry, and the quality control of the coating. The ratio of positive and negative pole capacity is related to the battery. The service life and safety performance, In order to ensure the safety performance of the battery, it is necessary to fully consider the positive and negative cycle characteristics of the battery charging and the ability of the negative electrode to accept lithium. The uniformity of the slurry directly affects the uniformity of the battery active material on the electrode, the slurry is not uniform, and the phenomenon of expansion and contraction of the negative electrode material occurs when the battery is charged and discharged. Poor quality control can easily lead to a short circuit inside the battery. In addition, the thickness and uniformity of the coating will affect the embedding and removal of active substances.

At present, lithium ion batteries are more and more widely used. Therefore, it is necessary to improve the production process of power lithium batteries as soon as possible and ensure the safety of the use of power lithium batteries. This will promote the development of lithium batteries and related industries.

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