Electrochemical devices and electronic devices

By using a meltable first insulating member in the insulating assembly of the electrochemical device to form an automatic pressure relief channel, the explosion problem caused by thermal runaway is solved, the manufacturing process is simplified and the energy density is improved.

CN115832638BActive Publication Date: 2025-03-18NINGDE AMPEREX TECHNOLOGY LTD
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Patent Information

Application Number
CN202211620367.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-08-16
Publication Date
2025-03-18
Estimated Expiration
2042-08-16

AI Technical Summary

Technical Problem

During the use of electrochemical devices, thermal runaway may occur, resulting in an increase in the pressure inside the shell and may cause an explosion. The prior art opens pressure relief grooves or holes through laser drilling. The process is cumbersome and costly, which affects production efficiency and energy density.

Method used

An electrochemical device is designed, wherein the housing has a mounting hole, and the insulating assembly includes a first insulating member that can be fused, and the pole column is connected to the housing through an insulating member. The first insulating member melts when the temperature rises to a threshold, forming a pressure relief passage, reducing the internal air pressure, and preventing explosion.

Benefits of technology

It realizes automatic pressure relief when the electrochemical device is thermally out of control, prevents explosions, simplifies the manufacturing process, improves production efficiency, and reduces material costs and improves energy density by reducing components such as pressure relief valves.

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Abstract

The present application relates to an electrochemical device and an electronic device, wherein the first side wall of the housing includes a first wall surface and a second wall surface, and the first side wall is provided with a through-going mounting hole. The insulating component is fitted and connected to the first wall surface or the second wall surface, and the first insulating member of the insulating component is provided with a through-going first through hole, and the first through hole is connected to the mounting hole. The first part of the pole is fitted and connected to the end surface of the insulating component away from the first side wall, one end of the second part of the pole is connected to the end surface of the first part facing the first side wall, and the other end is arranged at the mounting hole and the first through hole. When the temperature in the accommodating cavity rises to the first threshold value, the first insulating member melts and generates a pressure relief channel connecting the accommodating cavity and the outside of the housing under the action of the gas pressure in the housing cavity of the housing. The electrochemical device of the present application has a simple manufacturing process and is convenient for improving production efficiency; the insulating component has both insulation and pressure relief functions, which not only reduces the material cost, but also helps to improve the energy density of the electrochemical device.
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