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

A lithium-ion battery and cover plate technology, which is applied in secondary batteries, electrochemical generators, battery pack components, etc., can solve the problems of no positioning, single shape, and inability to replenish electrolyte to the battery cell body.

Active Publication Date: 2015-06-17
HUNAN HUAHUI NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0038] Depend on figure 1 , figure 2 , image 3 , Figure 4 It can be seen that a cylindrical lithium-ion battery cover plate includes a cylindrical cover 1, and the cover 1 is provided with a positive terminal 2 including a positive inner joint 3 and a positive outer joint 4, including a negative inner joint 6 and a negative outer joint. The negative pole terminal 5 of the joint 7, the diameter of the cover 1 is greater than or equal to 20 mm, the cover 1 is provided with an explosion-proof hole 18 and a liquid replenishment screw hole 19 passing through the cover 1, and the explosion-proof hole 18 is provided with a plugged explosion-proof hole The explosion-proof plug 20 of 18 is provided with a locking screw 21 plugging the liquid replenishment screw hole 19 on the liquid replenishment screw hole 19. The diameter of the cover body 1 in this embodiment is 88mm.

[0039] In order to better release the pressure of the cylindrical lithium-ion battery, the present inventio...

Embodiment 2

[0066] When the diameter of the cover body 1 is greater than or equal to 35 mm and less than or equal to 50 mm, for the convenience of connection, the positive external joint 4 and the negative external joint 7 of the present invention are horn-shaped, and are connected to external components by welding. The diameter of the cover body in this embodiment is 33mm.

[0067] In this embodiment, the shell shell 15 has a height of 80mm and a diameter of 35mm, and the platform 16 has a height of 2.0mm and a width of 2.0mm.

[0068] The rest are the same as embodiment 1.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M2/04H01M2/30H01M2/12H01M10/0525H01M10/058H01M50/152H01M50/30H01M50/552H01M50/636
CPCY02E60/10Y02P70/50
Inventor 顾慧军赵德永
Owner HUNAN HUAHUI NEW ENERGY
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