Multi-tab battery

Abstract

The invention discloses a multi-tab battery. The multi-tab battery comprises a battery cell assembly, a shell assembly, a pole assembly and insulating parts. The battery cell assembly comprises a positive plate and a negative plate; the positive plate comprises a positive substrate and a plurality of positive tabs; the negative plate comprises a negative substrate and a plurality of negative tabs; the positive tabs and the negative tabs extend outwards from the same end of the battery cell assembly along the radial direction to two opposite sides of the battery cell assembly and then are bent towards the other end along the axial direction; the shell assembly comprises a shell, the shell comprises a bottom wall and a side wall extending upwards from the periphery of the bottom wall, and a positive electrode hole and a negative electrode hole which are oppositely distributed are formed in the side wall; the pole assembly comprises a positive pole penetrating through the positive hole and connected with the positive tabs and a negative pole penetrating through the negative hole and connected with the negative tabs; and the insulating parts are arranged between the shell and the battery cell assembly and between the shell and the pole assembly. According to the multi-tab battery disclosed by the invention, the utilization rate of the shell space, the high-rate charge-discharge performance of the multi-tab battery and the use safety can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to a multi-pole battery. Background technique [0002] Currently commonly used batteries, the positive and negative tabs are usually a single tab structure, and generally the positive and negative tabs are welded to the pole piece respectively, and then the positive and negative tabs are drawn out from the axial ends of the battery cell, respectively. It is electrically connected to the case cover of the battery. In order to ensure the insulation between the positive and negative tabs and the casing of the battery, insulating sheets are usually provided at both axial ends of the battery core. [0003] For batteries with this structure, the utilization rate of the internal space of the shell is low, and the single tab structure easily leads to uneven distribution of current density, and welding tabs also easily leads to large internal resistance of the battery, which is not conduc...

AI Technical Summary

Problems solved by technology

[0003] For batteries with this structure, the utilization rate of the internal space of the shell is low, and the single tab structure easily leads to uneven distribution of current density, and welding tabs also easily leads to large internal resistance of the battery, which is not conducive to the high rate charge and discharge performance of the battery promotion

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