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Cylindrical lithium ion battery cathode nut cap

A lithium-ion battery and negative electrode cover technology, which is applied in the direction of battery cover/end cover, battery pack components, battery box/coating, etc., can solve the problem of increased internal resistance of welding points, low bonding strength of spot welding, and affecting the service life of battery packs and other problems, to achieve the effect of improving reliability, improving reliability of series and parallel connection, and high mechanical strength

Inactive Publication Date: 2012-12-05
SHANDONG AOYU POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional series and parallel connection of battery packs, the copper connecting piece is usually used to connect the battery with spot welding, but the bonding strength between the thicker copper piece and the battery end is low. Long-term use may increase the internal resistance of the welding point and affect the battery. group life

Method used

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  • Cylindrical lithium ion battery cathode nut cap
  • Cylindrical lithium ion battery cathode nut cap

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The positive electrode of the cylindrical lithium-ion battery is a cold-rolled 3003 aluminum alloy cap, the height of the top of the stud from the upper surface of the cover is 12 mm, and the outer diameter of the stud is 5 mm. The height of the square is 2mm and the side length is 10mm. The explosion-proof hole diameter is 3mm. The upper diameter of the circumferential cover is 32 mm, the thickness is 0.5 mm, and the lower diameter of the circumferential cover is 31 mm.

Embodiment 2

[0015] The positive electrode of the cylindrical lithium-ion battery is a cold-rolled 3003 aluminum alloy cap, the height of the top of the stud from the upper surface of the cover is 18 mm, and the outer diameter of the stud is 8 mm. The height of the square is 3mm and the side length is 15mm. The explosion-proof hole diameter is 4mm. The upper diameter of the circumferential cover is 40 mm, the thickness is 0.8 mm, and the lower diameter of the circumferential cover is 38.4 mm.

Embodiment 3

[0017] The positive electrode of the cylindrical lithium-ion battery is a cold-rolled 3003 aluminum alloy cap, the height of the top of the stud from the upper surface of the cover is 25 mm, and the outer diameter of the stud is 12 mm. The height of the square is 4mm and the side length is 20mm. The explosion-proof hole diameter is 6mm. The upper diameter of the circumferential cover is 60 mm, the thickness is 1.0 mm, and the lower diameter of the circumferential cover is 58 mm.

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Abstract

The invention discloses a cylindrical lithium ion battery cathode nut cap, which comprises a cover plate and a copper stud, wherein the middle part of the copper stud is provided with a cylindrical convex ring, while the bottom is a cube; the cover plate is riveted between the cylindrical convex ring and the cube of the copper stud; a stainless steel gasket is positioned between the cover plate and the cylindrical convex ring; plastic gaskets are positioned on the faces, which contact the stainless steel gasket and the copper stud, of the cover plate; an explosion-proof port is formed on the cover plate; and the diameter of the upper part of the circumferential cover plate is greater than that of the lower part to form a circular step. A large-capacitance lithium ion battery shell which is assembled by the cylindrical lithium ion battery cathode nut cap has high physical strength and high radiation, is convenient to use and improves the connection reliability of batteries.

Description

technical field [0001] The invention relates to a lithium ion battery negative pole cap. Background technique [0002] Large-capacity and high-power lithium-ion power batteries are required to have excellent high-rate charge-discharge performance during use, but under high-current charge-discharge conditions, the internal pressure of the battery is high, and liquid leakage is prone to occur, so the battery is required to be well sealed. In order to ensure that the battery is safe to use under the conditions of possible external short circuit, extrusion, acupuncture and impact, and that there will be no safety accidents such as explosion, an explosion-proof valve or an explosion-proof port with a stable opening pressure should be set in the structural design of the lithium-ion power battery. . In the traditional series and parallel connection of battery packs, the copper connecting piece is usually used to connect the battery with spot welding, but the bonding strength betwe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/04H01M2/12H01M50/147H01M50/342H01M50/517H01M50/567H01M50/588
CPCY02E60/12Y02E60/10
Inventor 张文魁叶张军梁文明吴志川胡纯利涂江平
Owner SHANDONG AOYU POWER SUPPLY
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