Battery top cover and power battery

Abstract

The invention discloses a battery top cover and a power battery. The battery top cover comprises a top cover sheet, a positive pole column, a negative pole column, positive pole conductive upper plastic and negative pole insulating upper plastic. The top cover sheet comprises a sheet-shaped main body and two pole post rings which are formed on the upper end surface of the main body in a protruding manner. Two pole mounting holes are formed in the main body, and a pole ring is arranged at the periphery of each pole mounting hole. The positive pole and the negative pole are respectively arranged in the pole mounting holes in a penetrating manner. The positive pole conductive upper plastic and the negative pole insulating upper plastic are respectively arranged on the pole post rings. Welding aluminum rings are welded to the peripheries of the pole mounting holes in the lower end face of the main body of the top cover sheet through laser respectively. A sealing ring is arranged between each welding aluminum ring and the body. According to the invention, the top cover sheet is manufactured through the integrated punching technology and the upper plastic and the top cover sheet are integrally formed through injection molding, so the production technology can be simplified, and the production cost can be reduced; and the aluminum rings are welded on the back surface, so the positive pole conductive upper plastic / negative pole insulating upper plastic can be prevented from melting and the welding yield is improved.

Description

technical field [0001] The invention relates to the field of power batteries, in particular to a battery top cover and a power battery. Background technique [0002] With the increasingly prominent environmental problems, low-carbon economy has become the mainstream of future economic development. The increasingly severe air situation has further promoted the rise of new energy vehicles. Hybrid electric vehicles and pure electric vehicles, as representatives of new energy vehicles, have gradually been recognized by the majority of manufacturers and consumers. As the main power source of new energy vehicles, power batteries have become one of the key components of electric vehicles. [0003] The power battery top cover currently used in the market usually includes: a top cover sheet with two mounting holes, a positive pole and a negative pole passing through the installation holes, and a positive conductive plastic sleeve sleeved on the outer circumference of the positive p...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a battery top cover and a power battery, which overcomes the defect that the positive electrode conductive plastic and the negative electrode insulating plastic are likely to melt in the prior art.

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