Integrated high-temperature decomposition connector and lithium ion battery comprising same

Abstract

The invention discloses an integrated high-temperature decomposition connector and a lithium ion battery comprising the same. The integrated high-temperature decomposition connector comprises a connecting plate and supporting columns fixedly arranged on one side of the connecting plate at intervals, clamping columns are fixedly connected to the top ends of the supporting columns, and an insertinggroove is formed between every two adjacent clamping columns; the top end face of the clamping column and the inner side wall of the inserting groove are each provided with a conductive layer; the clamping column is made of a high-temperature decomposition material; and the high-temperature decomposition material is formed by mixing heat-sensitive resin and a functional additive. The connector disclosed by the invention is composed of two parts, namely high-temperature-decomposed thermosensitive resin and a conductive layer. The conductive layer can be electrically connected with a battery cell tab, and the thermosensitive resin can be automatically decomposed when the temperature of the battery cell is too high, so that the conductive layer on the surface layer collapses, an electric connection effect is not generated, further thermal runaway of the battery cell can be prevented, and the safety performance of the battery is greatly improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to an integrated pyrolysis connector and a lithium ion battery containing the connector. Background technique [0002] In the past two decades, lithium-ion batteries have become the most important power source for new energy vehicles. In order to make it widely available, the performance of Li-ion batteries needs to be further reduced while improving their performance. In addition, in order to improve the cruising range of electric vehicles, the industry is still pursuing lithium-ion batteries with higher energy density. [0003] In the design of battery packs and modules, the design of fuses for the electrical connection between cells has always been a difficult point. When a problem occurs in a single cell, such as a micro-short circuit, if the electrical connection with the cell can be cut off in time, It can prevent further thermal runaway of the cell. However, ...

AI Technical Summary

Problems solved by technology

Compared with the square battery, the pouch battery has a more free shape design, but after the thermal runaway of the monomer, it is difficult to use the design similar to the explosion-proof valve of the square battery to guide the heat away, because the pouch battery breaks The place is random, and the heat generated will cause thermal runaway of the surrounding batteries one after another

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