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

Abstract

The invention discloses an injection molding assembling method of a secondary battery top cover assembly. The injection molding assembling method comprises the following steps: (1), preparing a top cover plate, a first electrode terminal, a second electrode terminal, a first sealing element, a second sealing element, an explosion-proof structure and a lower insulating bracket; (2), assembling the lower insulating bracket on the top cover plate; (3), assembling the first electrode terminal assembled with the first sealing element and the second electrode terminal assembled with the second sealing element on the top cover plate; (4), assembling the explosion-proof structure on the top cover plate; and (5), putting the product into a mold, performing injection molding, and enabling a first colloid of the molded first fixing piece to penetrate through the first electrode terminal, the first sealing piece and the top cover plate from top to bottom; enabling a second colloid of the formed second fixing piece to penetrate through the second electrode terminal, the second sealing piece and the top cover plate from top to bottom; meanwhile, integrally forming the explosion-proof structure and the top cover plate in an injection molding mode, and forming an integrated sealing structure. The invention further discloses the secondary battery top cover assembly 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...

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

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