Battery

Abstract

The invention provides a battery. According to the battery, through the synergistic effect of a positive pole plate termination adhesive tape and fluoroethylene carbonate in a non-aqueous electrolyte, the high-temperature performance of the battery cell of the prepared battery can be effectively improved, and meanwhile, the problem that lithium is separated out from the edge of a pole plate after the battery cell is cycled can be solved. When a battery is used in a high-temperature environment, a positive pole plate termination adhesive tape warps and deforms, as a result, the high-temperature storage thickness of a battery cell is invalid, high-temperature circulation lithium precipitation is caused, an adhesive layer in the positive pole plate termination adhesive tape is easily dissolved in a non-aqueous electrolyte, and the non-aqueous electrolyte is easily oxidized, reduced and decomposed on a positive and negative electrode interface. With the battery of the invention adopted, the above problems can be solved.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a high-voltage battery with excellent high-temperature performance. Background technique [0002] In recent years, batteries have been widely used in smartphones, tablet computers, smart wearables, power tools, and electric vehicles. With the wide application of batteries, consumers' requirements for battery energy density and use environment continue to increase, which requires batteries to have excellent high-temperature safety performance under high voltage. [0003] At present, there are potential safety hazards in the use of batteries. For example, when the battery is in extreme use such as continuous high temperature, serious safety accidents are prone to occur, and the battery cell is deformed and caught fire or even exploded. The main reason for these problems is that the glue layer of the battery terminal tape is easily soluble in the electrolyte under hig...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that when the existing battery is used in a high temperature environment, the positive electrode end tape is warped and deformed, which leads to the failure of the high temperature storage thickness of the battery cell and high temperature cycle analysis of li

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