Electrochemical device, battery module and electric equipment

Abstract

The invention relates to an electrochemical device which comprises a shell and an electrode assembly, the shell comprises a conductive shell and a pole assembly, the pole assembly comprises a pole and an insulation sealing ring, the insulation sealing ring sleeves the pole, and the insulation sealing ring is located between the conductive shell and the pole; the pole comprises a first end part and a second end part, the first end part is electrically connected with the electrode assembly, the second end part is exposed out of the conductive shell, and the second end part is used for being in contact with an external conductor; the electrochemical device further comprises a limiting part, the limiting part is connected to the insulating sealing ring, and the limiting part protrudes out of the end face of the second end part; the external conductor can be directly contacted with the end face of the second end part to perform contact test, the limiting part protrudes out of the end face of the second end part, the moving range of the external conductor on the end face can be limited through the limiting part, and when the external conductor is contacted with the second end part, the limiting part can effectively prevent the external conductor from sliding off from the pole, so that the testing efficiency is improved. Therefore, short-circuit accidents of the electrochemical device are reduced.

Description

technical field [0001] The present application relates to the technical field of batteries, in particular to an electrochemical device, a battery module and electrical equipment. Background technique [0002] Lithium-ion batteries occupy an absolute dominant position in today's consumer digital product market. With the continuous innovation and research of technicians, various new outsourcing materials have emerged, which has greatly enriched the product market for lithium batteries. For research and development Strong enterprises are leading the direction of the entire industry. Among the many lithium battery packaging materials, the steel shell has gradually attracted more and more people's favor and attention due to its superior burrowing performance and safety performance. Because the steel shell material only contains one layer of steel sheet, so Designers can use the steel case itself as the negative electrode when designing the battery. Correspondingly, batteries wit...

AI Technical Summary

Problems solved by technology

[0003] When the steel shell battery is formed, it is necessary to use a probe to conduct a contact test on the steel shell (negative electrode) and the positive electrode. When the probe touches the positive electrode for testing, the probe and the positive and negative electrodes of the steel shell battery are often short-circuited. resulting in a short circuit in the battery; therefore, it is necessary to provide a solution to avoid the short circuit of the steel case battery during the formation test

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