Connection structure of cell polar ear and cover plate

Abstract

The invention relates to a connection structure of a cell polar ear and a cover plate, which comprises the polar ear and the cover plate, wherein the terminal part of a cell is provided with an insulating space ring and an elastic conductive ring; the polar ear passes through a hole on the insulating space ring, and then is electrically connected with the elastic conductive ring; the elastic conductive ring is also provided with an elastic pressing sheet; and the elastic conductive ring is electrically connected with the cover plate through the elastic pressing sheet. The connection structureis also provided with a clip, wherein one end of the clip is provided with a compressing surface and presses the elastic pressing sheet on the elastic conductive ring through the compressing surface;the other end of the clip is provided with a clamping groove; the insulating space ring is provided with an elastic clamping hook; and the elastic clamping hook is matched with the clamping groove. The connection structure makes the polar ear electrically communicated with the elastic conductive ring through simple assembly so as to be connected with the cover plat without welding, and improves the assembling efficiency. The connection structure is provided with the insulating space ring capable of effectively preventing short circuits caused by a contact between a connected metal conductor and a shell or a polar plate. The connection structure is provided with the elastic pressing sheet to ensure reliable connection between the polar ear and the elastic conductive ring. The connection structure is provided with the clip to eliminate poor contact caused by deformation of the elastic pressing sheet.

Description

technical field [0001] The invention relates to a battery structure, in particular to a connection structure between tabs of a battery cell and a cover plate. Background technique [0002] A lithium-ion secondary battery consists of a negative plate, a positive plate, an electrolyte, and a separator interposed between the positive and negative plates to prevent short circuits. The positive plate and the negative plate are made into thin plates or foils, and then the electrode plates and the intervening separator are stacked in sequence or spirally wound to form a battery core, and then the battery core is filled with stainless steel, nickel-plated iron, and aluminum metal Electrolyte is poured into the casing or laminated flexible film battery container, and sealed to form a battery. Wherein, the electrical conduction between the battery core and the outside world is realized through the connection between the lug connected to the pole plate and the pole or the cover plate....

AI Technical Summary

Problems solved by technology

However, in the production of batteries, this method is complicated to operate, especially the splash of metal particles is easy to be generated during fusion welding, which has a great impact on the safety and performance of the battery cell, and the interpenetration welding will also be caused by mechanical vibration and inconvenient operation. The connection between the tab and the plate is strained and affects the performance of the battery

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