Electric vehicles provide a practical way to solve the problem of traditional energy consumption and air pollution in the future. Whether it is policy support or people's acceptance of electric vehicles, we can see the rapid development of electric vehicle industry. In the field of electric vehicles, lithium battery technology is the key to the development of electric vehicle industry in the future. Compared with other kinds of batteries, lithium battery has a higher charge and discharge speed and energy density. At present, electric vehicles equipped with lithium-ion battery can almost meet the urban demand. Although there are many advantages, the safety problems exposed by lithium battery electric vehicles are also a very concerned aspect. How to control the safety of lithium battery? Reading this article may give you some inspiration.

Lithium battery, as the name implies, is a kind of secondary battery that generates energy by the movement of lithium ion, that is, rechargeable and discharge battery. This kind of battery is also a common form of battery in our life. From mobile home appliances to electric vehicles, lithium battery has gradually become the mainstream development direction. Especially in the field of electric vehicles, the advantages of lithium battery make it play a great role in the field of electric vehicles, but also because of the popularity of lithium battery, the safety of lithium battery has gradually become a social hotspot.

With the popularity of new energy vehicles, people's demand for power lithium batteries is growing. But in recent years, new energy vehicle fires have occurred frequently. The survey results show that most of them are related to the power battery, so the safety of the power lithium battery has become a hot topic for a while.

There are many factors that affect the safety of lithium battery, among which the battery material has an important impact on the safety of lithium battery, because the battery material generally has thermal activity, when the battery temperature continues to rise, there will be many internal thermal reactions, when the heat can not be dissipated in time, it is easy to cause battery safety accidents, so the choice of positive and negative materials for lithium battery safety Can have a significant impact.

Secondly, the manufacturing process of the battery is also an important factor affecting the safety performance of the battery. There are three main factors, namely, the capacity ratio of positive and negative electrodes, slurry uniformity control and coating quality control. The capacity ratio of positive and negative electrodes is related to the service life and safety performance of the battery. In order to ensure the safety performance of the battery, it is necessary to fully consider the positive and negative electrodes when charging the battery. Cycle characteristics and the ability of the negative electrode to accept lithium. The uniformity of the slurry directly affects the uniformity of the distribution of the active substances on the electrode. The slurry is not uniform, and the expansion and contraction of the negative electrode materials will occur when the battery is charged and discharged. In addition, the thickness and uniformity of coating will affect the insertion and removal of active substances.

At present, lithium-ion batteries are more and more widely used, so we need to improve the production process of power lithium batteries as soon as possible to ensure the safety of power lithium batteries, so as to promote the development of lithium batteries and related industries.