Three yuan acupuncture can not be fired, GAC E'an magazine battery decryption
The new energy vehicle safety consensus has shifted from single safety to system safety, and improving the safety of the entire battery pack has become the mainstream trend of the industry. On March 10th, GAC Ion announced the safety technology of the magazine battery system of a new generation of power lithium battery safety technology. The battery pack equipped with this technology successfully passed the acupuncture thermal diffusion test, realizing the whole package of ternary lithium-ion battery acupuncture 'no Caught fire'. GAC Aian introduced that the magazine battery is a systematic technology that specifically enhances the safety of power lithium batteries. It is a complete set of safety technologies from intrinsic safety of batteries, passive safety to active safety. It is mainly based on the design idea of u200bu200b'preventing short circuit in the cell, preventing thermal runaway after short circuit, and preventing heat spread after thermal runawayAnd when an abnormal battery cell is detected, the system will automatically cool the battery. Specifically, the magazine battery is important to create the safe and efficient protection of the ternary battery pack from all levels of battery cell, system, heat dissipation, and BMS. Cell level: Through the application of nano-scale coating and doping technology of cathode material, the thermal stability of the cell is improved to prevent thermal runaway. The application of new additives to the electrolyte can realize the self-repair of the SEI film and improve the battery life. The high-safety electrolyte can spontaneously polymerize at high temperature to form a polymer film with high impedance characteristics, which greatly reduces the heat generation of thermal runaway reactions. The application of these key technologies has increased the heat-resistant temperature of the cell by 30%. System level: A super heat-insulated safety cabin is formed through the meshed nanoporous heat insulation material and high-temperature-resistant upper shell, so that the thermal runaway of the ternary lithium battery cell does not spread to adjacent cells, and the upper shell of the battery pack can withstand temperature of more than 1400 . Heat dissipation system: Through the design of fully-fitted liquid cooling system, high-speed heat dissipation channels, and high-precision heat conduction paths, the magazine battery realizes a 40% increase in heat dissipation area and a 30% increase in heat dissipation efficiency. BMS: By adopting the latest generation of vehicle-grade battery management system chips, it realizes all-weather data collection 10 times per second. When an abnormality is found, immediately start the battery quick cooling system to cool the battery. Under the optimization and blessing of the above-mentioned core technology, GAC Aian said that the magazine battery is related to the ordinary battery of the same type, with a volumetric energy density increase of 9.4%, a weight energy density increase of 5.7%, and a cost reduction of 10%. According to the plan, the magazine battery will be successively installed on GAC AESafe series models this year.