Cylindrical lithium ion battery cover plate, cylindrical lithium ion battery and production method of cylindrical lithium ion battery

Abstract

The invention discloses a large-capacity and large-size cylindrical lithium ion battery cover plate which comprises a cylindrical cover body; the cover body is provided with an anode binding post and a cathode binding post, wherein the anode binding post comprises an anode inner connector and an anode external connector, and the cathode binding post comprises a cathode inner connector and a cathode external connector; the cover plate is characterized in that the diameter of the cover body is greater than or equal to 35 mm, the cover body is provided with an explosion-proof hole and a fluid supplementing screw hole which penetrate through the cover body, the explosion-proof hole is provided with an explosion-proof plug for plugging the explosion-proof hole, and the fluid supplementing screw hole is provided with a locking screw for plugging the fluid supplementing screw hole; a cylindrical lithium ion battery comprises a battery core body sealedly packaged in an aluminum outer shell through the cover plate, and two ends of the battery core body are respectively provided with an anode seat and a cathode seat; the production method comprises battery core body preparation, baking, soaking, assembling, post-processing and other steps; the cover plate has the advantages of simple structure and convenient connection and use, effectively prevents explosion of the lithium ion battery, prolongs the service life of the lithium ion battery, and improves heat dissipation effects and use performance.

Description

technical field [0001] The invention relates to a cylindrical lithium-ion battery, in particular to a cylindrical lithium-ion battery cover plate, a lithium-ion battery and a production method, in particular to a large-capacity (capacity ≥ 10Ah), large-size (diameter ≥ 35㎜ ), a cylindrical lithium-ion battery cover plate, a cylindrical lithium-ion battery, and a production method thereof. Background technique [0002] At present, most of the cylindrical lithium-ion batteries whose positive and negative electrodes are led out in the same direction have a simple cover structure, and the positive and negative external connectors on the positive and negative terminals on the cover plate have a single shape, which is easy to fall off from the external wires, and the connection Very inconvenient. Especially when the capacity of the cylindrical lithium-ion battery reaches 10Ah and the size reaches more than 35 mm in diameter, due to the limitation of the singleness of the positive...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the cylindrical lithium-ion batteries whose positive and negative electrodes are led out in the same direction have a simple cover structure, and the positive and negative external connectors on the positive and negative terminals on the cover plate have a single shape, which is easy to fall off from the external wires, and the connection Very inconvenient

Especially when the capacity of the cylindrical lithium-ion battery reaches 10Ah and the size reaches more than 35 mm in diameter, due to the limitation of the singleness of the positive and negative external terminals, it is impossible to achieve large-scale cylindrical lithium-ion batteries, and there are still lithium-ion batteries. The safety performance of the battery is low, the electrolyte cannot be replenished after the electrolyte is lost, and the service life is short, etc.

At the same time, with the increase of capacity and size, due to the lack of positioning of the battery body, the heat dissipation is limited, and there are certain safety hazards

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