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Injection molding assembly method of secondary battery top cover assembly and top cover assembly

A technology of secondary battery and assembly method, which is applied in the direction of battery cover/end cover, small-sized battery/battery pack, battery, etc. Affect the assembly efficiency of secondary batteries and other issues, and achieve the effects of increasing bonding stability, reducing production costs, and increasing fixing strength

Active Publication Date: 2021-04-06
武汉富航精密工业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Due to the complex structure of the pole itself and the assembly process, it will not only affect the assembly efficiency of the secondary battery, but after the pole is fixed on the top cover, the pole will often be disconnected from the top cover due to insufficient fixing force. phenomenon, thereby reducing the reliability of the secondary battery

Method used

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  • Injection molding assembly method of secondary battery top cover assembly and top cover assembly
  • Injection molding assembly method of secondary battery top cover assembly and top cover assembly
  • Injection molding assembly method of secondary battery top cover assembly and top cover assembly

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Embodiment Construction

[0055] In order to further illustrate the technical means and functions adopted by the present invention to achieve the intended purpose, the specific implementation modes of the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0056] Please refer to Figure 1 to Figure 5 , an embodiment of the present invention provides an injection molding assembly method for a secondary battery top cover assembly 100, including the following steps:

[0057] (1) Prepare the following components: top cover plate 1, first electrode terminal 2, second electrode terminal 3, first seal 8, second seal 9, explosion-proof structure 4, lower insulating bracket 5, first connecting piece 23 , the second connecting sheet 33, the first insulating film 24 and the second insulating film 34;

[0058] (2) Assembling the lower insulating bracket 5 on the bottom surface of the top cover plate 1;

[0059] (3) Ultrasonic welding the ...

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Abstract

The invention discloses an injection molding assembly method of a secondary battery top cover assembly. The injection molding assembly method comprises the following steps: (1) preparing all parts; (2) assembling a lower insulating bracket on the bottom surface of the top cover plate; (3) assembling the first electrode terminal welded with the first connecting sheet, pasted with the first insulating film and assembled with the first sealing piece on the bottom surface of the top cover plate; assembling a second electrode terminal welded with a second connecting sheet, pasted with a second insulating film and assembled with a second sealing piece on the bottom surface of the top cover plate; (4) assembling an explosion-proof structure on the bottom surface of the top cover plate; and (5) putting into a mold for injection molding, wherein a first colloid formed on the first fixing piece sequentially penetrates through the top cover plate, the first sealing piece and the first electrode terminal, a second colloid formed on the second fixing piece sequentially penetrates through the top cover plate, the second sealing piece and the second electrode terminal, and the explosion-proof structure and the top cover plate are integrated through injection molding to form an integrated sealing structure. The invention further discloses the top cover assembly of the secondary battery, which is obtained by implementing the injection molding assembly method.

Description

technical field [0001] The invention relates to the field of secondary batteries, in particular to an injection molding assembly method for a top cover assembly of a secondary battery and the top cover assembly. Background technique [0002] New energy vehicles are being widely promoted at home and around the world, but there are still many things to improve in order to completely replace fuel vehicles. For example, the mileage of the car is small, the cost of the battery pack is high, and the reliability of the battery pack needs to be further resolved. Based on the above problems, higher requirements are put forward for the power battery, the core component of electric vehicles, such as higher energy density and lower cost for the power battery. [0003] At present, the power battery generally adopts a square hard shell structure. The power battery shell includes a shell and a top cover assembly. The power battery shell provides a closed space to accommodate the electrode...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/188H01M50/186H01M50/147H01M50/543H01M50/30B29C45/14
CPCB29C45/14467H01M2220/20Y02E60/10
Inventor 陈中元
Owner 武汉富航精密工业有限公司
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