First there is a "blade" and then there is a "magazine". How can the lithium battery industry win?

          Due to its own chemical properties, the ternary lithium battery will have extremely strong reaction under certain degree of structural damage and extreme high temperature, namely, the heat is out of control, the light is burned violently, the heavy one will explode, and it is difficult to extinguish in a short time.
         The cartridge battery not only meets the national requirements, but also exceeds the requirement of "no explosion in 5 minutes", which can be said to improve the safety of ternary lithium battery.

Although the technology of graphene battery with "8-minute overcharge and service life of more than 1000 km" was questioned before, after all, the focus of the debate was on the charging facilities and the power grid end capabilities, not the battery itself; therefore, with a realistic attitude, the author studied the so-called "cartridge battery" seriously.

         The "cartridge battery" technology of GAC is essentially the general name of the safety system of the whole battery package, which includes four parts: the electric core, the physical structure of the battery pack, the cooling system and the management system.

         Firstly, the core used in the "cartridge battery" can improve the thermal stability and prevent the heat out of control by optimizing the cathode materials by using nano coating and doping technology. Adding new additives in electrolyte can realize self repair of SEI film to improve the life of the core and reduce the risk of short circuit. At the same time, when heating to 120 degrees, the additive can also be used to improve the life of the core and reduce the risk of short circuit The polymer film with high impedance formed by the polymerization of the active material surface reduces the heat production when the heat is out of control.

        Cathode material is also the origin of the name of ternary lithium battery, such as NCA lithium battery (nickel cobalt aluminum ternary lithium battery) and NCM lithium battery (nickel cobalt manganese ternary lithium battery). The binder and conductive agent of cathode material itself are one of the main culprits of thermal runaway. Through nano coating and doping technology, the binder and conductive agent can be more evenly covered on the lithium compound, So as to reduce the chain reaction of further intensification after thermal runaway, and then improve the thermal stability and prevent thermal runaway.

        Although it is not clear what kind of additives are added to the electrolyte, if the self-healing of SEI film can be realized, the phenomenon of lithium dendrite and cathode material loss can be reduced, so as to improve the life of the cell and reduce the possibility of short circuit. At the same time, the main reason why the violent reaction of the active material can not be suppressed when the heat is out of control is that the active material and the cathode material are unstable If the additive forms a high impedance polymer film on the surface of the active material, it can inhibit or reduce the reaction intensity after thermal runaway, so as to reduce the heat generated after thermal runaway.

       Secondly, the "cartridge battery" has a super thermal insulation safety cabin, that is, the physical shell of the battery pack has super thermal insulation ability. Through the reticulated nanopore thermal insulation material and the high temperature resistant shell, on the one hand, the temperature resistance of the shell can reach 1400 degrees, on the other hand, it can prevent the thermal runaway of the cell from spreading to the adjacent cell.
       The high temperature resistance of the shell solves two problems. One is that the external high temperature causes the instability of the internal electric core, prevents the temperature outside the battery from causing the danger of the battery pack, and the other is to prevent the heat from spreading to the outside after the internal heat is out of control, so as to ensure the safety of the personnel inside the vehicle. The insulation material itself is to eliminate the heat conduction between the internal core and the electric core. Because the batteries used in electric vehicles are dozens or even hundreds of battery packs, one of the main reasons for combustion and explosion is the chain reaction between the cores. If the spread of the core heat is controlled, the danger can be brought about The risk is many times lower.

      Secondly, the "cartridge battery" is equipped with a temperature control system with rapid cooling. Through fully fitting liquid cooling structure, GAC has achieved 40% increase in heat dissipation area and 30% of heat dissipation efficiency, effectively preventing heat spreading.