battery collector

Abstract

The invention discloses a battery current collector. The connection part includes a stress buffer part located on the outside and an annular body located on the inside. The annular body is integrally injection-molded with a plurality of support parts extending toward the bottom cover of the negative electrode, and the support parts are radially distributed to the stress Between the inner side of the buffer part and the central column, and the upper part of the support part is provided with a convex structure facing and resisting the bottom cover of the negative electrode. The advantage is that the collector support mechanism is integrally injection molded on the basis of the sealing ring, Reduce the cost of materials, reduce the insert process, simplify the process flow, the plastic molded sealing ring cooperates with the negative electrode bottom cover, and has lower requirements on the concentricity of each part, thereby reducing production and management costs, and the overall weight of the battery is lighter. Shipping costs are reduced accordingly. Due to the omission of the auxiliary supporting sheet, the thickness of the entire current collector is reduced, the internal space of the battery is increased, and the active material is increased, thereby enhancing the electrical performance of the battery.

Description

technical field [0001] The invention relates to a battery sealing and explosion-proof structure, in particular to a battery current collector. Background technique [0002] The current collector is an important structure in the battery, especially to ensure the safety performance of the battery. Its main functions are: 1. The function of safety valve to prevent the explosion of the internal gas pressure of the battery; 2. The sealing function, that is, to close the opening at the bottom of the battery case; 3. The current collection function, to collect and transport the negative electrode inside the battery to the outside generated current. [0003] For example, the Chinese authorized invention patent with the publication date of April 3, 2013 and the patent number of 201210562378.1 discloses "a battery current collector", including a sealing ring, a negative electrode bottom cover and a conductor nail. The central cylinder, the outer peripheral part closely attached to t...

AI Technical Summary

Problems solved by technology

The above-mentioned battery current collector has the following disadvantages: 1. The auxiliary support sheet with a certain thickness increases the volume of the current collector. Under the condition that the overall volume of the battery is constant, the internal space of the battery is reduced, and the active material is reduced, which is unfavorable to the electrical performance of the battery.

2. Increase the auxiliary support piece and add an inserting process, the complexity of the process increases, and the cost of raw materials and production management increases

3. The auxiliary support sheet is made of metal material, the weight of a single battery increases, and the transportation cost increases

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