Lithium battery top cover assembly and secondary battery

Abstract

The invention discloses a lithium battery top cover assembly. The lithium battery top cover assembly comprises a top cover plate, a first sealing element and a second sealing element, a first electrode terminal and a second electrode terminal, a lower insulating bracket, and a first fixing member and a second fixing member. A first rubber body formed on the first fixing member penetrates through a terminal injection molding via hole, a sealing element injection molding via hole and a top cover plate injection molding via hole and is connected with the lower insulating bracket into a whole, and a first occlusion rubber body formed on the first fixing member is embedded into a terminal texture groove and the top cover plate texture groove; a second rubber body formed on the second fixing member penetrates through the terminal injection molding via hole, the sealing element injection molding via hole and the top cover plate injection molding via hole and is connected with the lower insulating bracket into a whole, and a second occlusion rubber body formed on the second fixing member is embedded into the terminal texture groove and the top cover plate texture groove to form an integrated sealing structure. The invention further discloses an injection molding assembling method of the lithium battery top cover assembly.

Description

technical field [0001] The invention relates to a lithium battery top cover assembly, in particular to a lithium battery top cover assembly and a secondary battery. Background technique [0002] The development and utilization of secondary batteries is related to the continuous development of new energy technologies. As the current clean energy, the development and utilization of electric power is a long-term strategic goal. [0003] In the process of assembling and packaging the secondary battery, there are certain deficiencies in the traditional packaging cover plate assembly and the corresponding assembly method. The cover plate assembly package is only sealed with a simple sealing ring, which has poor sealing performance for the liquid inside the secondary battery. [0004] At the same time, 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...

AI Technical Summary

Problems solved by technology

[0003] In the process of secondary battery assembly and packaging, there are certain deficiencies in the traditional package cover assembly and the corresponding assembly method. The cover assembly package is only sealed with a simple sealing ring, which has poor sealing performance for the liquid inside the secondary battery.

[0004] At the same time, 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 separated from the top cover due to insufficient fixing force. connection phenomenon, thereby reducing the reliability of the secondary battery

Images