Miniature column type lithium ion battery sealing structure, battery and manufacturing method thereof

Abstract

The invention discloses a miniature column type lithium ion battery sealing structure, and relates to the technical field of battery structures. The structure comprises a shell provided with a bottom surface and a side wall extending around the edge of the bottom surface, and an upper cover connected with the top surface of the shell, wherein the top surface of the shell is open, and the upper cover is hermetically connected with the side wall of the shell through a sealing ring to form a hollow battery cavity; and a sealing insulating layer is arranged between the upper cover and the sealing ring. The miniature column type lithium ion battery is compact in sealing structure, and the volume of the battery cavity can be increased by adopting a single-shell shell structure; the upper cover is connected with the side wall of the shell in a sealed mode through the sealing ring, and the sealing insulation layer is arranged between the upper cover and the sealing ring and surrounds the covered edge of the upper cover, so that the sealing insulation effect is improved. According to the miniature column type lithium ion battery adopting the miniature column type lithium ion battery sealing structure, the capacity of the battery cavity is large, the sealing performance and the stability performance are good, and the risk of electrolyte leakage in the battery cavity is reduced while the energy storage electric energy can be large in capacity.

Description

technical field [0001] The invention relates to the technical field of battery structures, in particular to a sealing structure of a micro-column lithium-ion battery, a battery and a manufacturing method thereof. Background technique [0002] Rechargeable lithium-ion batteries and lithium pouch batteries are widely used in sustainable electronic devices, such as button batteries in mobile phones and Bluetooth headsets. In smaller and more sophisticated equipment, battery volume energy density is a key consideration, such as hearing aids, wireless Bluetooth headsets, electronic watches, gastroenteroscope swallowing equipment, etc.; due to the high volume requirements for rechargeable lithium-ion batteries , in order to reduce the battery volume while ensuring the application efficiency of the battery, micro-column lithium-ion batteries with spirally wound electrodes are mostly used, but in the process of increasing the energy density with a limited volume, new technical probl...

AI Technical Summary

Problems solved by technology

[0003] Existing miniature cylindrical lithium-ion batteries generally have a double-tube upper case and a lower case. By connecting the upper case and the lower case together, a sealed insulating layer is provided in the middle. Due to the limited volume of the miniature cylindrical battery, the existing The miniature cylindrical battery can only keep the overall volume constant by compressing the volume of the battery cavity

[0004] At the same time, the existing micro-cylindrical batteries are not tightly sealed due to the shell structure and other reasons, so that the electrolyte in the battery cavity leaks, resulting in shortened battery life and failure, or the electrolyte corrodes the precision components in the equipment.

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