High-safety lithium ion battery

• Main Authors: ZHAO SHAOHUAI, YANG SHAN, CHEN JIE, YAN XIANG, HAN BING, TANG FENGJUAN, LI ZAIBO
• Format: Patent
• Language: Chinese; English
• Published: 03.07.2020
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The utility model belongs to the technical field of batteries. The utility model relates to a lithium ion battery, in particular to a high-safety lithium ion battery. The lithium ion battery comprisesan aluminum-plastic film and a battery cell packaged in the aluminum-plastic film, the battery cell is connected with a tab extending out of the aluminum-plastic film; wherein a tab adhesive is arranged on the surface of the tab, the tab adhesive at least comprises a first insulating polymer film layer and a second insulating polymer film layer which are connected with each other, the melting point of the second insulating polymer film layer is higher than or equal to 185 DEG C, and the melting point of the first insulating polymer film layer is 110-160 DEG C. Compared with the prior art, packaging is weakened under the condition that other properties are not affected, and the effect of enhancing heat dissipation is achieved, so that the safety performance of the battery is improved, andthe passing rate of hot bo