CN206312954U - A kind of square lithium ion battery fine aluminium structure cover plate - Google Patents

Abstract

The utility model discloses a pure aluminum structure cover plate of a square lithium ion battery. The positive electrode contact terminal and the negative electrode contact terminal are fixedly installed above the cover plate, and the positive electrode lead piece and the negative electrode lead piece are fixedly installed below the cover plate, and are insulated and sealed. The parts are fixed and installed on the cover plate by injection molding, and the positive contact terminal, the positive lead piece and the negative contact terminal, and the negative lead piece are separated at intervals, and the positive contact terminal and the negative contact terminal are fixedly squeezed and connected to the insulating seal. The positive rivets, The negative electrode rivet runs through the positive electrode contact terminal and the negative electrode contact terminal, the insulating seal, the cover plate, the positive electrode lead sheet and the negative electrode lead sheet sequentially from top to bottom. Its advantages are: the structure of the utility model is simple, and the cover plate and the insulating seal are integrally connected by injection molding, which can be regarded as a whole and have a long service life; the positive rivet and the negative rivet connect all the accessories in series in sequence for stamping and riveting, and the operation It is convenient and fast, improves work efficiency, and the riveting structure is not complicated and the structure is firm.

Description

A square lithium-ion battery pure aluminum structure cover plate

technical field

The utility model belongs to the general technical field of lithium batteries, in particular to a square lithium ion battery pure aluminum structure cover plate.

Background technique

With the rapid development of the lithium-ion battery industry, the market competition is becoming more and more fierce. On the premise of achieving the same quality, it is necessary to reduce the cost of the battery, reduce the weight of the battery itself, and increase the energy density of the battery. During the operation of the vehicle, the power battery is required to have low heat generation and high power. At the same time, under various uncertain factors such as bumps and collisions during the operation, to maintain the stability of the battery performance, it is necessary to ensure the firmness of the battery structure; in the market environment , low-cost, high-efficiency batteries will become the mainstream of the future market.

Utility model content

The purpose of the utility model is to provide a square lithium-ion battery pure aluminum structure cover plate with simple structure, convenient processing and reasonable design for the deficiencies of the prior art.

The technical scheme that the utility model adopts is:

A pure aluminum structure cover plate for a square lithium-ion battery, comprising a positive contact terminal, a negative contact terminal, a cover plate, a positive rivet, a negative rivet, an explosion-proof valve, a protective cover, a positive lead piece, a negative lead piece, an insulating seal and a drain The innovative point of the air port is that the positive contact terminal and the negative contact terminal are fixedly installed above the cover plate, the positive lead piece and the negative lead piece are fixedly installed below the cover plate, and the insulating seal is fixed by injection molding. Installed on the cover plate, and separate the positive contact terminal, the positive lead piece and the negative contact terminal, and the negative lead piece at intervals, the positive contact terminal and the negative contact terminal are fixedly squeezed and connected with the insulating seal, and the positive rivet, The negative rivet runs through the positive contact terminal and the negative contact terminal, the insulating seal, the cover plate, the positive lead piece and the negative lead piece from top to bottom, and is sealed and connected by rivet punching and expansion. The explosion-proof valve is fixed and installed on the cover by welding. In the middle of the plate, the protective cover is fixed above the explosion-proof valve by welding.

Further, the outer surfaces of the negative lead piece and the negative rivet are both provided with a nickel-plated layer, the notch angle of the negative contact terminal is ≥94°, and the distance between the positive contact terminal and the center of the rivet is the same as the distance between the negative contact terminal and the center of the rivet. unanimous.

Further, the positive contact terminal, negative contact terminal, cover plate, positive lead piece, positive rivet explosion-proof valve and protective cover are made of pure aluminum, the negative lead piece and negative rivet are made of electrolytic red copper, and the insulating seal The material is PFA.

The beneficial effects of the utility model are as follows:

The utility model has a simple structure. The cover plate and the insulating seal are integrally connected by injection molding, which can be regarded as a whole and have a long service life. The work efficiency is high, and the riveting structure is not complicated, and the structure is firm; at the same time, most of the accessories are stamped parts, which are easy to process and low in cost.

Description of drawings

The utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is the structural representation of the utility model.

detailed description

As shown in Figure 1, a pure aluminum structure cover plate of a square lithium-ion battery includes a positive contact terminal 1, a negative contact terminal 2, a cover plate 3, a positive rivet 4, a negative rivet 5, an explosion-proof valve 6, a protective cover 7, The positive electrode lead 8, the negative electrode lead 9, the insulating seal 10 and the exhaust port 11, the positive electrode contact terminal 1 and the negative electrode contact terminal 2 are fixedly installed above the cover plate 3, and the positive electrode lead 8 and the negative electrode lead 9 are fixedly installed on the Below the cover plate 3, the insulating seal 10 is fixedly installed on the cover plate 3 by injection molding, and the positive contact terminal 1, the positive lead piece 8, the negative contact terminal 2, and the negative lead piece 9 are spaced apart, and the positive contact terminal 1 and the negative The contact terminal 2 and the insulating seal 10 are fixedly extruded and connected, and the positive rivet 4 and the negative rivet 5 run through the positive contact terminal 1 and the negative contact terminal 2, the insulating seal 10, the cover plate 3, and the positive tab 8 from top to bottom. and the negative lead piece 9, and are sealed and connected by rivet stamping expansion, the explosion-proof valve 6 is fixedly installed in the middle of the cover plate 3 by welding, and the protective cover 7 is fixed on the top of the explosion-proof valve 6 by welding.

Put the positive rivet 4 at the bottom, insert the positive lead 8, the insulating seal 10, the injection-molded cover plate 3 and the positive contact terminal 1 in sequence, fix all the accessories, press the positive rivet 4 to expand, and finally the cover plate 3 is positive Extremely, next place the negative electrode rivet 5 at the bottom, insert the negative electrode lead piece 9, the insulating seal 10, the injection molded cover plate 3 and the negative electrode contact terminal 2 in sequence, fix all the accessories, and press the negative electrode rivet 6 to expand, and finally The negative end of the cover plate 3 is followed by laser sealing and welding of the explosion-proof valve 6 and the protective cover 7 in sequence, and finally the processed square lithium-ion battery pure aluminum structure cover plate is obtained.

The above descriptions are preferred implementations of the present utility model, and should not be used to limit the scope of rights of the present utility model. It should be pointed out that for a person of ordinary skill in the art, any modification or equivalent replacement of the technical solution of the present utility model will not depart from the protection scope of the present utility model.

Claims (3)

1. a kind of square lithium ion battery fine aluminium structure cover plate, including Positive contact terminal, negative contact terminal, cover plate, positive pole Rivet, negative pole rivet, explosion-proof valve, protective cover, positive pole leader, negative pole leader, insulating sealer and exhaust outlet, it is characterised in that： The Positive contact terminal and negative contact terminal are fixedly mounted on the top of cover plate, and the positive pole leader and negative pole leader are fixed Installed in the lower section of cover plate, the insulating sealer by being molded fixed installation on the cover board, and by Positive contact terminal, positive pole Leader and negative contact terminal, negative pole leader are spaced apart, the Positive contact terminal and negative contact terminal and insulated enclosure Part is fixed extruding connection, and the positive pole rivet, negative pole rivet sequentially pass through Positive contact terminal from top to bottom and negative pole connects Contravention, insulating sealer, cover plate, positive pole leader and negative pole leader, and be connected and sealed by rivet punching press expansion, it is described By being welded and fixed installed in the centre of cover plate, the protective cover is fixed by welding in the top of explosion-proof valve to explosion-proof valve.

2. a kind of square lithium ion battery fine aluminium structure cover plate according to claim 1, it is characterised in that：The negative pole draws The outer surface of piece and negative pole rivet is provided with nickel coating, and into >=94 °, the positive pole connects the negative contact terminal Notch angle Contravention it is sub from rivets central away from negative contact terminal from rivets central away from consistent.

3. a kind of square lithium ion battery fine aluminium structure cover plate according to claim 1, it is characterised in that：The positive pole connects Contravention, negative contact terminal, cover plate, positive pole leader, positive pole rivet explosion-proof valve and protective cover are pure aluminum materials, and the negative pole draws Piece and negative pole rivet are electrolysis red copper materials, and the insulating sealer material is PFA.