Cover plate structure of lithium battery

Abstract

A cover plate structure of a lithium battery belongs to the technical field of lithium battery components. The structure comprises a cover plate body which is provided with a pressure relief explosion-proof hole; a pressure relief explosion-proof mechanism which is arranged on one side, back to the lithium battery shell, of the cover plate body; a positive pole which is arranged at the left end ofthe cover plate body, and a negative pole which is arranged at the right end of the cover plate body. The structure is characterized in that an insulating base plate, anode and cathode lead sheets are arranged below the cover plate body; the insulating base plate is attached to the downward side of the cover plate body, and a lithium battery core positioning protection box is arranged in the middle; an explosion-proof vent hole is formed in the middle of a bottom plate of the lithium battery core positioning protection box, explosion-proof air outlet holes are formed in the periphery, a positive pole column insulation pad is fixed to the left end of the cover plate body and corresponds to the position below a positive pole column, and a negative pole column insulation pad is fixed to theright end and corresponds to the position below a negative pole column. Electrical isolation and insulation are reliable, the lithium battery core is firmly fixed, the service life is long, and electrolyte is prevented from flowing around; the electrical conduction effect is ensured, and the cost is reduced; electrolyte is convenient to inject; and detection and maintenance measures are rapidly taken for the whole lithium battery.

Description

technical field [0001] The invention belongs to the technical field of lithium battery components, and in particular relates to a cover plate structure of a lithium battery. Background technique [0002] Since the end of the last century, lithium batteries have created a new energy storage revolution and provided electricity to the world. From smartphones to electric vehicles, lithium batteries have been ubiquitous, and they have paved the way for an increasingly connected world. Compared with other commercial rechargeable batteries, lithium batteries have the advantages of high energy density, long cycle life, wide operating temperature range, and safety and reliability. As known in the industry, a lithium battery consists of a casing, a lithium battery core (composed of a plurality of positive and negative electrodes separated by a diaphragm) and a cover plate. [0003] Lithium battery cover plate is an important part of the structure system of lithium battery, which is w...

AI Technical Summary

Problems solved by technology

But the technical scheme of this publication has the following deficiencies: First, the electrode column in this patent includes a reinforced conductive part and a pole connecting part, and the electrode sheet positioned under the substrate is welded on the lower end surface of the reinforced conductive part, thus On the one hand, the positioning reliability of the electrode sheet is often difficult to guarantee and the electrical connection between the electrode sheet and the electrode column is lacking. On the other hand, professional welding equipment and welding materials are required in the welding process, resulting in high production costs; Second, the positive and negative poles need to pass through the left and right injection molded seals and substrates in turn, and the overall structure needs to be formed by injection molding, which makes the structure complex and inconvenient to install, and it is also easy to damage the positive and negative poles during use Thirdly, the base plate cannot effectively fix the lithium battery core in the existing lithium battery housing. In the case of some bumps and collisions, the lithium battery core arranged under the base plate is easy to shake around, not only It will scratch the substrate and other components, and seriously affect the normal use and working life of the lithium battery cell itself

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