The invention relates to a lithium ion battery and a preparation method and application thereof. The lithium ion battery comprises a laminated battery cell pole group, and a high-temperature-resistantflame-retardant material is arranged on the side edge of the laminated battery cell pole group, so that the thermal diffusion spreading mode in the laminated battery cell pole group is converted fromtwo-dimensional diffusion spreading in the X/Z direction into one-dimensional diffusion spreading in the Z direction in a winding form, the thermal shock to the shell when the laminated battery cellfails is reduced, meanwhile, due to the arrangement of the high-temperature-resistant flame-retardant material, the heat conduction rate of heat diffusion and the destructiveness during failure can beeffectively reduced, the damage of the laminated battery cell caused by failure is further effectively reduced, the safety of the laminated battery cell is improved, and the stability of the side edge of the laminated battery cell pole group can be effectively improved as the high-temperature-resistant flame-retardant material is arranged.
本发明涉及一种锂离子电池及其制备方法和用途,所述锂离子电池包括叠片式电芯极组,所述叠片式电芯极组的侧边设置有耐高温阻燃材料,使得叠片式电芯极组内的热扩散蔓延方式由X/Z方向的二维扩散蔓延转变为卷绕形式的Z方向的一维扩散蔓延,减少叠片式电芯失效时对壳体的热冲击,同时,耐高温阻燃材料的设置能有效降低热扩散的热传导速率及失效时的破坏性,进而有效减弱叠片式电芯因失效造成的损坏,提高叠片式电芯的安全性,且耐高温阻燃材料的设置还能有效改善叠片式电芯极组侧边的稳定性。
Lithium ion battery and preparation method and application thereof
一种锂离子电池及其制备方法和用途
2020-10-16
Patent
Electronic Resource
Chinese
IPC: | H01M Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie , PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY / A62C FIRE-FIGHTING , Feuerbekämpfung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen |
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