Method for assembling rechargeable battery

Abstract

The invention discloses a method for assembling a rechargeable battery. The rechargeable battery comprises a battery core, a steel shell and a battery cover; the battery core comprises an anode, a cathode and a diaphragm, a pole lug is led out from the anode, the battery cover comprises a lower cover, an explosion-proof ball and an upper cap, and the lower cover is provided with a hole. The method comprises the following steps of: 1. shell assembly by coiling: coiling the anode, the cathode and the diaphragm into the battery core and then assembling the battery core into the steel shell; (2) trenching and glue spreading: trenching and spreading glue on the opening of the steel shell; (3) sealing ring arrangement: arranging a sealing ring on the battery core; (4) lower cover connection: fixing the pole lug on the lower bottom surface of the lower cover and connecting the lower cover with the anode; (5) lower cover pressing: pressing the lower cover in the sealing ring; (6) sealing: sealing the lower cover with a sealing machine; (7) liquid injection: injecting electrolyte through the hole in the lower cover; (8) explosion-proof ball arrangement: arranging the explosion-proof ball on the lower cover; (9) upper cap fixing: holding the explosion-proof ball with the upper cap and fixing the upper cap on the lower cover; and (10) standing and forming. The method for assembling the rechargeable battery can be used for greatly reducing alkali climbing phenomenon and improving the percent of pass of products and prolonging the service life of the products.

Description

technical field [0001] The invention relates to the assembly of rechargeable batteries, in particular to a method for assembling rechargeable batteries. Background technique [0002] Rechargeable batteries such as nickel-metal hydride batteries and nickel-zinc batteries are favored by people because of their advantages such as high energy density, high rate discharge and fast charging, and have been one of the key development directions in the past two decades. Traditional rechargeable battery assembly methods such as figure 1 As shown in the figure, it is: winding casing—roll groove glue coating—liquid injection—placing the sealing ring—placing the battery cover—spot welding the battery cover—pressing the battery cover—sealing—shelving and forming. This process also includes the combined battery cover, that is, The battery cover is composed of the lower cover, the explosion-proof ball and the upper cap before assembly. The liquid injection methods used include centrifugal ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide an assembly method for a rechargeable battery by making up for the shortcomings in the prior art of battery alkali creep, easy contamination of the electrolyte, insufficient electro-hydraulic volume, and uneven battery performance.

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