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Lithium ion Battery Safety Factor II

Shenzhen Sinoli Electronic Co.,Ltd | Updated: Sep 28, 2018

In addition to the collision ignition, if the natural state of fire, it should be the battery itself or the whole system problem, because a strong impact on the fuel vehicle also has the possibility of explosion. As far as the battery itself is concerned, there may be the following problems:



Battery quality problem:


Ouyang Minggao, academician of the Chinese Academy of Sciences, believes that the main cause of the recent electric vehicle fire is product quality problems, mainly due to insufficient testing and verification of battery products, deterioration of reliability in the aging process of vehicles, low level of charging safety management technology, and some products in the design and verification of the use process is not rigorous. Compliance with relevant technical standards and norms and other factors.



The industry does exist in the car factory to reduce costs, battery manufacturers in order to maintain profits, jerry-building, in the absence of sufficient verification of the situation on the bulk supply.



Battery chemistry:


The internal resistance of the battery will also heat up. At a certain temperature, the oxidant on the cathode reacts with the electrolyte, which is made up of organic solvents and is no less flammable than gasoline. A large number of chemical reaction heat will cause thermal runaway, produce a large number of gases, and then lead to high pressure, battery rupture, and then vehicle combustion, explosion.



The battery will lead to lithium decomposition at low temperature, fast charge and over charge. Lithium dendrites grow continuously until they pierce the battery diaphragm and cause short circuit, which leads to positive and negative contact, rapid accumulation of heat, leading to the battery wrapped in fire.



Battery production process:


Battery material, diaphragm, binder, structure, sealing, production technology, production process control and other factors, will cause car fire.



For example, the material in the core is not pure enough, and there are too many impurities. In the manufacturing process, if impurities are mixed into the battery, impurities may break through the diaphragm during the charging process, resulting in partial short circuit of the battery, causing spontaneous combustion.


nowadays, more and more new energy car manufacturer, taking the use of allowerance policy, neglect battery quality verfication. safety is always the ultmost first consideration of product.