Structure and assembly method of lithium polymer battery

Abstract

The invention discloses a structure and assembly method of a lithium polymer battery. According to the assembly method, a battery core is installed in to a shell with a plastic frame through a protection board. The assembly method comprises the following steps: (1) forming four rectangle holes and two notches in the end part of a shell with a plastic frame, arranging four outwardly-projecting trapezoidal buttons in the width direction of a rectangle protection board, arranging two rectangle nickel blocks on the surface of the protection board, and arranging a positive tab and a negative tab on the battery core; (2) inserting the four projecting trapezoidal buttons on the protection board into four corresponding rectangle holes in the plastic shell so as to fixedly connect the protection board and the shell; (3) making the positive tab and negative tab on the battery core go through two notches in the plastic shell so as to cover the two rectangle nickel blocks on the protection board by the positive tab and negative tab respectively, and then welding the tabs and the nickel blocks together through a spot welding technology; (4) after spot welding, folding the battery core in 90 degrees, and installing the battery core into the shell with a plastic frame to obtain a lithium polymer battery. Through the provided assembly method, the yield is improved from 95% to 99.8%, and the assembly efficiency is increased by 220% or so.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a structure and an assembly method of a lithium polymer battery. Background technique [0002] In recent years, lithium polymer batteries have been widely used in digital products, mobile phones and other electronic products. The structure design of existing lithium polymer batteries makes its assembly method as follows: spot welding lithium polymer batteries and protective plates, Then put the spot-welded protective plate and battery cells into the frame plastic shell. With this assembly structure and assembly method, because the protective plate and the battery core have been connected in performance, it is very easy to pull the power off during the process of loading into the shell. The tabs of the core and the sealing area of ​​the battery are damaged, so that there are performance and safety hazards after the battery is assembled, which will affect the quality of the batte...

AI Technical Summary

Problems solved by technology

[0002] In recent years, lithium polymer batteries have been widely used in digital products, mobile phones and other electronic products. The structure design of existing lithium polymer batteries makes their assembly method as follows: spot welding lithium polymer batteries and protective plates, Then put the spot-welded protective plate and battery cells into the frame plastic shell. With this assembly structure and method, because the protective plate and the battery core have been connected in performance, it is very easy to pull the power off during the process of loading into the shell. The tabs of the core and the sealing area of ​​the battery are damaged, so that there are performance and safety hazards after the battery is assembled, thus affecting the quality of the battery

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