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Sealing assembly for battery, manufacturing method thereof, and battery having same

A technology of sealing components and manufacturing methods, which is applied to battery pack components, large-size batteries/battery packs, small-size batteries/battery packs, etc., and can solve the problem of difficult control of the dimensional accuracy of ceramic rings and poor bonding strength of brazing layers. Uniformity, poor airtightness and reliability, etc., to achieve the effect of large shear force on the sealing layer failure, ensure brazing yield, and good airtightness

Active Publication Date: 2017-07-04
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially for ceramic rings, the dimensional accuracy of ceramic rings is difficult to control due to the inherent inaccuracy of the manufacturing process
If the processing accuracy is not high, it is very easy for the three to be misaligned or assembled, and finally cause uneven bonding force of each part of the brazing layer, or even missing welding, resulting in unsatisfactory air tightness or reliability
And due to factors such as assembly and brazing, the yield rate is not easy to stabilize when brazing

Method used

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  • Sealing assembly for battery, manufacturing method thereof, and battery having same
  • Sealing assembly for battery, manufacturing method thereof, and battery having same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The sealing assembly 10 serves as the positive tab. The metal ring 100 is made of aluminum, the insulating ring 200 is a ceramic ring, and the stem 400 is an aluminum stem.

[0062]The size of the ceramic ring is: outer diameter 10-11mm, outer inclination angle 5°, inner ring upper part diameter 6mm, height 2mm, lower part diameter 5mm, height 2.5mm, stepped ring width 0.5mm. The upper part of the aluminum core column has a diameter of 5.8mm and a height of 3mm, and the lower part of the aluminum core column has a diameter of 4.8mm and a height of 5mm. The inner diameter of the metal ring 100 is 10-11mm, the inclination angle is 5°, and the thickness is 1-2mm. The inner surface of the metal ring 100 is covered with a layer of Al—Si—Mg solder.

[0063] The insulating ring 200 is disposed in the metal ring 100 , and the stem 400 is disposed in the insulating ring 200 . An Al-Si-Mg welding ring with an outer diameter of 5.98 mm, an inner diameter of 5 mm, and a thicknes...

Embodiment 2

[0069] The sealing assembly 10 serves as the positive tab. The metal ring 100 , insulating ring 200 and stem 400 in this embodiment are the same as the metal ring 100 , insulating ring 200 and stem 400 in Embodiment 1.

[0070] The inner surface of the metal ring 100 is covered with a layer of Al—Si—Mg solder. The insulating ring 200 is disposed in the metal ring 100 , and the stem 400 is disposed in the insulating ring 200 . An Al-Si-Mg welding ring with an outer diameter of 5.98 mm, an inner diameter of 5 mm, and a thickness of 0.1-0.4 mm formed by stamping or wire cutting, and the Al-Si-Mg welding ring is placed between the first step part 210 and the second step part 440 between. Wherein, the Al-Si-Mg solder layer includes 13% silicon and 0.15% magnesium, and the balance is aluminum and unavoidable impurities. Al-Si-Mg solder rings consist of 6% silicon and 3% magnesium, with the balance being aluminum and unavoidable impurities.

[0071] Place the assembled metal ring...

Embodiment 3

[0075] The sealing assembly 10 serves as the positive tab. The metal ring 100 , insulating ring 200 and stem 400 in this embodiment are the same as the metal ring 100 , insulating ring 200 and stem 400 in Embodiment 1.

[0076] The inner surface of the metal ring 100 is covered with a layer of Al—Si—Mg solder. The insulating ring 200 is disposed in the metal ring 100 , and the stem 400 is disposed in the insulating ring 200 . An Al-Si-Mg welding ring with an outer diameter of 5.98 mm, an inner diameter of 5 mm, and a thickness of 0.1-0.4 mm formed by stamping or wire cutting, and the Al-Si-Mg welding ring is placed between the first step part 210 and the second step part 440 between. Wherein, the Al-Si-Mg solder layer includes 10% silicon and 2.0% magnesium, and the balance is aluminum and unavoidable impurities. Al-Si-Mg solder rings consist of 10% silicon and 1.5% magnesium, with the balance being aluminum and unavoidable impurities.

[0077] Place the assembled metal ri...

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Abstract

The invention discloses a sealing assembly for a battery and a manufacturing method thereof, and also discloses a battery with the sealing assembly. The sealing assembly for the battery includes: a metal ring; an insulating ring, the insulating ring is arranged in the metal ring, and a first solder is arranged between the outer surface of the insulating ring and the inner surface of the metal ring. material layer, wherein the inner surface of the insulating ring is provided with a first stepped part; and a stem, the stem is arranged in the insulating ring, and the peripheral surface of the stem is provided with the In the second stepped portion opposite to the stepped portion, a second solder layer is provided between the peripheral surface of the stem and the inner surface of the insulating ring. The sealing assembly for a battery according to the embodiment of the present invention has the advantages of easy manufacture, good airtightness, high soldering yield, and large breaking shear force of the sealing layer.

Description

technical field [0001] The invention relates to a sealing assembly for a battery and a manufacturing method thereof, and also relates to a battery with the sealing assembly. Background technique [0002] Existing sealing assemblies for batteries include a stem, an insulating ring, and a metal outer ring, and these three components can be joined together by brazing. Various parts of the existing sealing assembly for batteries are required to have high machining accuracy. Especially for ceramic rings, the dimensional accuracy of ceramic rings is difficult to control due to the inherent error in the manufacturing process. If the processing accuracy is not high, it is very easy for the three to be misaligned or assembled, and finally cause uneven bonding force of each part of the brazing layer, or even missing welding, resulting in poor airtightness or reliability. And due to factors such as assembly and brazing, the yield rate is not easy to stabilize during brazing. Conten...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/02H01M2/06H01M2/08H01M50/10H01M50/172H01M50/186
CPCH01M50/10H01M50/186H01M50/191H01M50/183Y02E60/10
Inventor 宫清林信平张旭林勇钊徐述荣
Owner BYD CO LTD