Battery cover board component and lithium ion battery using the same

Abstract

The battery cover assembly provided by the present invention comprises a positive pole (2), a negative pole (3), a metal cover (1) and an insulating clamp (5), and the outer ends of the positive pole (2) and the negative pole (3) are respectively Pass through the positive pole slot (51) and the negative pole slot (52) on the insulating cardboard (5) and the positive pole through hole (11) and the negative pole through hole (12) on the metal cover (1) and fasten with fasteners The shape of the peripheral surfaces of the positive pole positioning block (21) and the negative pole positioning block (31) are different from each other, and they are respectively non-rotatable and non-interchangeable accommodated in the positive pole clamping slot (51) and the negative pole clamping slot ( 52) Inside. By designing the peripheral surface shapes of the positive pole positioning block and the negative pole positioning block to be different from each other, the positive pole positioning block and the negative pole positioning block can only be accommodated in the positive pole clamping groove and the negative pole clamping groove respectively, thereby preventing the positive pole The post and the negative pole post are installed in wrong positions, which improves the safety performance of the battery.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a battery cover assembly and a lithium ion battery using the battery cover assembly. Background technique [0002] Existing batteries generally include a casing, a cover plate and a pole. The cover plate is fixed on the casing, and the pole passes through a through hole on the cover plate and is fastened with a nut. [0003] Batteries, especially high-capacity lithium-ion batteries, will generate a lot of heat during charging and discharging, and the heat generated by the positive electrode is much higher than that generated by the negative electrode. The materials are different, and the thermal conductivity of the positive pole (aluminum) is lower than that of the negative pole (copper), so when the two pass the same current, the heat of the positive pole must be higher than that of the negative pole. Therefore, in order to ensure the safety of the battery and ensure accurate temperatu...

AI Technical Summary

Problems solved by technology

[0008] However, since the metal cover plate and the insulating clamping plate are independent structures, they need to be sealed and fixed by two upper and lower sealing rings, so the assembly steps are relatively cumbersome, and the consistency and reliability of the assembly process are relatively poor.

At the same time, because the shape of the grooves of the positive and negative poles is the same, the function of assembly error prevention cannot be achieved, so it is possible to install the temperature sensor at the position of the negative pole and the function of temperature monitoring at the positive pole cannot be realized.

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