What Measures Again Lithium ion Battery Safety Problems?
In view of the thermal runaway of lithium-ion batteries, the domestic mainstream solutions mainly include external protection and internal improvement. External protection mainly refers to the upgrading of the system, and internal improvement refers to the improvement of the battery itself.
(1) upgrading of cooling mode
The thermal management system is mainly responsible for controlling the temperature and ensuring that the battery is kept at a reasonable operating temperature. Usually, the thermal management system is controlled by the vehicle controller. When the temperature of the battery pack is abnormal, the air conditioning system is used to heat or heat in time to ensure the safety and life of the battery. The heat dissipation mode of the battery is divided into four categories according to the heat conduction mode and medium: air cooling (air cooling), liquid cooling (water cooling), phase change material (solid), and combined cooling (air cooling / water cooling + solid cooling).
(2) improvement of internal materials and structures
Internal improvement is to transform the material structure of the battery, so that the battery has better heat resistance and heat dissipation performance. At present, the development of solid-state electrolyte, the structural modification of positive and negative electrodes, and the introduction of safer diaphragm materials are all the mainstream methods to improve the thermal performance of the battery from the inside.
in writer's review, to improve the safety reliability of lithium ion battery application in new energy cars, car manufacturer should make enough test first before put into market, even though most EV cars have time warning notice as counter measures to give passengers on cars to leave the car. actually buyers don't want to see any fire after buy with not less money.