NCM acupuncture does not cause fire, GAC E'an magazine battery decryption
Abstract: GAC E'an magazine battery mainly builds safe and efficient protection of the ternary battery pack from all levels of battery cell, system, heat dissipation, and BMS.
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 released a new generation of power battery safety technology-magazine battery system safety technology. The battery pack equipped with this technology successfully passed the acupuncture thermal diffusion test, realizing the whole package of ternary lithium battery acupuncture. Caught fire".
GAC Aian introduced that the magazine battery is a systemic technology that specializes in improving the safety of power batteries. It is a complete set of safety technologies from intrinsic safety of batteries, passive safety to active safety.
Mainly based on the design idea of "preventing short circuit in the cell, preventing thermal runaway after short circuit, and preventing heat spread after thermal runaway", the design of a safety cabin is adopted to effectively prevent the spread of out-of-control cells. And when an abnormal battery cell is detected, the system will automatically cool the battery.
Specifically, the magazine battery is mainly from the cell, system, heat dissipation, and BMS levels to create a safe and efficient protection of the ternary battery pack.
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: through the mesh nanoporous heat insulation material and high temperature resistant upper shell, a super heat insulation safety cabin is formed, 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 1400℃ the above.
Heat dissipation system: Through the design of fully-fitted liquid cooling system, high-speed heat dissipation channel, and high-precision heat conduction path, 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 battery management system chips of vehicle-grade grade, it can realize all-weather data collection 10 times per second. When an abnormality is found, immediately start the battery quick cooling system to cool the battery.
With the optimization and blessing of the above-mentioned core technology, GAC Aian said that compared with similar ordinary batteries, the volume energy density of the magazine battery is increased by 9.4%, the weight energy density is increased by 5.7%, and the cost is reduced by 10%.
According to the plan, the magazine battery will be successively installed on GAC AESafe series models this year.