CN209389071U - An all-tab battery cover - Google Patents

Abstract

The utility model discloses a full-lug battery cover plate, which comprises a cover plate; the positive pole column and the negative pole column are sequentially arranged on the cover plate; the first supporting part and the second supporting part are positioned on one side of the cover plate, which is far away from the positive pole, and comprise two first connecting sheets and two first soft connecting sheets, and one ends of the two first connecting sheets are connected with the cover plate; the two first soft connecting pieces are respectively positioned at two sides of the two first connecting pieces, one end of each first soft connecting piece is connected with the corresponding first connecting piece, and the other end of each first soft connecting piece is a free end. The utility model discloses convenient welding, it is effectual.

Description

An all-tab battery cover

technical field

The utility model relates to the technical field of lithium batteries, in particular to an all-tab battery cover plate.

Background technique

With the development of the lithium battery industry, the quality control of lithium batteries is becoming more and more stringent. As an important component of lithium batteries, the battery cover plate, the optimization of its structure is crucial to the performance of the battery such as power, capacity, and rate. Impact. At present, during the production process of lithium-ion batteries, welding, assembly and shelling are necessary. If the structure of the cover plate is not reasonable enough, it will affect the production pass rate and battery performance. At present, the main problems of the existing cover plates are as follows: 1) Double rivet positive and negative poles are mostly used, the structure is complex, the mass is heavy and the volume is large, the welding area of the single cell is large when it is assembled into a module, it is time-consuming and laborious, and the contact internal resistance Large; 2) The multi-roll battery uses double connecting pieces, but there is no support between the double-layer connecting pieces, the balance and stability are poor, and it is easy to cause the connecting pieces to break during welding, resulting in high waste; 3) The battery tab current collector is relatively large When the thin plate is welded to the connecting piece of the cover plate, it is easy to cause the current collector of the tab to be broken, resulting in a bad battery. Welding is often done by manually cutting the soft connecting piece, placing the soft connecting piece at the tab, and welding the soft connecting piece and the connecting piece. The consistency of the battery is poor, and the pass-through rate is low. 4) There is no positive identification code on the cover plate, and the color of the positive and negative electrodes is easily oxidized into a uniform color after production, and it is difficult to identify the positive and negative electrodes. In view of this, therefore propose this application.

Utility model content

In order to solve the technical problems in the background technology, the utility model proposes a battery cover with all tabs, which has good effect.

The utility model proposes a full-tab battery cover plate, comprising

cover;

The positive pole and the negative pole are installed on the cover in turn;

The first support part is located on the side of the cover plate away from the positive pole, and it includes two first connecting pieces and two first flexible connecting pieces, and one end of the two first connecting pieces is connected to the cover plate; the two first connecting pieces The flexible connectors are respectively located on both sides of the two first connecting pieces, one end of the first flexible connecting piece is connected to the first connecting piece, and the other end is a free end;

The second supporting part is located on the side of the cover plate away from the negative pole, which includes two second connecting pieces and two second flexible connecting pieces, and one end of the two second connecting pieces is connected to the cover plate; the two second connecting pieces The flexible connectors are respectively located on both sides of the two second connecting pieces, one end of the second flexible connecting piece is connected to the second connecting piece, and the other end is a free end.

Preferably, the first support part also includes a first pillar, the first pillar is "I" shape, and the two first connecting pieces are connected to the cover plate through the first pillar; the second support part also includes a second pillar, the second The pillar is "I" shape, and the two second connecting pieces are connected with the cover plate through the second pillar.

Preferably, the first supporting part also includes a first insulating part, the first insulating part is located between the first pillar and the cover plate, and the first insulating part is connected with the first pillar and the cover plate; the second supporting part also includes a second The insulating part, the second insulating part is located between the second pillar and the cover plate, and the second insulating part is connected with the second pillar and the cover plate.

Preferably, both the first insulating part and the second insulating part are made of corrosion-resistant high polymer rubber material.

Preferably, the first connecting piece, the first flexible connecting piece, and the first pillar are all made of pure aluminum; the second connecting piece, the second flexible connecting piece, and the second pillar are all made of pure copper.

Preferably, both the positive pole and the negative pole include a body and a rivet connected to the body.

Preferably, a positive sign is provided on the cover plate.

Preferably, an identification code is provided on the cover.

Preferably, the first supporting part further includes a first connecting piece, and the two first connecting pieces are connected through the first connecting piece.

Preferably, the second supporting part further includes a second connecting piece, and the two second connecting pieces are connected through the second connecting piece.

In the utility model, the winding core is placed between the first connecting piece and the first flexible connecting piece, between the second connecting piece and the second flexible connecting piece, for the first connecting piece and the first flexible connecting piece, the second The connecting piece and the second flexible connecting piece are welded, which is convenient for welding the winding core and improves the work efficiency. The size of the first flexible connecting piece and the second flexible connecting piece are uniform and regular, which can improve the consistency and quality of the battery core, avoid manual cutting, and avoid Time-consuming, labor-intensive and irregular disadvantages, while improving the firmness and pass-through rate of welding.

Description of drawings

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

Fig. 2 is the structure schematic diagram that the utility model cooperates with winding core;

Fig. 3 is the structure diagram after welding;

Figure 4 is the core.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other; the utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

Referring to Figures 1-4, the utility model proposes a full-tab battery cover 1, including

The cover plate 1 is provided with an explosion-proof valve 15 and a liquid injection hole 16; the positive electrode column 2 and the negative electrode column 3 are installed on the cover plate 1 in sequence.

The first supporting part is located on the side of the cover plate 1 away from the positive pole 2, and it includes two first connecting pieces 4, two first flexible connecting pieces 5, a first pillar 13, a first insulator 8, a first insulator The piece 8 is connected to the cover plate 1; the first pillar 13 is an "I" shape, the first pillar 13 is located on the side of the first insulating part 8 away from the cover plate 1, and the first pillar 13 is connected to the first insulating part 8; Each of the first connecting pieces 4 is located on the side of the first pillar 13 away from the first insulator 8, and the top ends of the two first connecting pieces 4 are connected to the first pillar 13; the two first flexible connectors are respectively located on the two sides On both sides of the first connecting piece 4 , one end of the first flexible connecting piece 5 is connected to the first connecting piece 4 , and the other end is a free end.

The second supporting part is located on the side of the cover plate 1 away from the negative pole 3, and it includes two second connecting pieces 6, two second flexible connecting pieces 7, a second pillar 14, a second insulator 9, a second insulator The part is connected with the cover plate 1; the second pillar 14 is "I" shape, the second pillar 14 is located on the side of the second insulating part away from the cover plate 1, and the second pillar 14 is connected with the second insulating part; two second The connecting pieces 6 are located on the side of the second pillar 14 away from the second insulator, and the top ends of the two second connecting pieces 6 are connected to the second pillar 14; the two second flexible connectors are respectively located on the two second connecting pieces. 6, one end of the second flexible connecting piece 7 is connected to the second connecting piece 6, and the other end is a free end.

There are "I"-shaped first pillars 13 and second pillars 14, so that there is a distance between the cover plate 1 and the winding core, which can prevent the short circuit caused by the contact between the winding core and the cover plate 1. In addition, the "I"-shaped first pillar 13 , The second pillar 14 saves material and facilitates the infiltration of the battery after liquid injection.

Further, both the first insulating part 8 and the second insulating part 9 are made of corrosion-resistant high polymer rubber material. Corrosion resistant and also avoid short circuit.

Further, the first connecting piece 4, the first flexible connecting piece 5, and the first pillar 13 are all made of pure aluminum material; the second connecting piece 6, the second flexible connecting piece 7, and the second pillar 14 are all made of pure copper material production.

Further, both the positive pole 2 and the negative pole 3 include a body and a rivet connected to the body. Such a simple structure occupies a small volume, which can improve the space utilization rate and further increase the volumetric energy density of the battery cell.

Further, a positive sign 10 is provided on the cover plate 1 . It is convenient to identify the position of the positive and negative poles, and the identification of the positive and negative pole positions can be avoided in subsequent operations.

Further, the cover plate 1 is provided with an identification number 11. It is convenient to identify the core type, etc.

Further, the first supporting part further includes a first connecting piece, and the two first connecting pieces 4 are connected through the first connecting piece. The first connecting piece has at least a first protruding portion, and the first protruding portion is placed on a side of the first connecting piece 4 away from the center of the cover plate 1 . Further, the second supporting part further includes a second connecting piece 12 , and the two second connecting pieces 6 are connected through the second connecting piece 12 . The second connecting member 12 has at least a second protruding portion, and the second protruding portion is placed on a side of the second connecting piece 6 away from the center of the cover plate 1 . The upper and lower ends of the two first connecting pieces 4 are connected by a first connecting piece. The upper and lower ends of the two second connecting pieces 6 are connected by the second connecting piece 12 .

By arranging the first connecting piece and the second connecting piece 12, the stability and firmness are improved, and breakage during welding is prevented. By providing the first protruding part and the second protruding part, it is convenient for the winding core and the welding head to extend in during welding.

During operation, the two ends of the core A are relatively narrow, and the two ends of the core A are respectively placed between the first connecting piece 4 and the first flexible connecting piece 5, the second connecting piece 6 and the second flexible connecting piece. 7, through the ultrasonic welding machine, the first connecting piece 4 and the first flexible connecting piece 5, the second connecting piece 6 and the second flexible connecting piece 7 are welded, so that the winding core and the first connecting piece 4, the second The connecting piece 6, the first flexible connecting piece and the second flexible connecting piece 7 are connected together. It is convenient to weld the winding core and improve the work efficiency. The size of the first flexible connecting piece 5 and the second flexible connecting piece 7 are uniform and regular, which can improve the consistency and quality of the battery core, avoid manual cutting, and avoid the disadvantages of time-consuming, laborious and irregular. At the same time, the firmness and pass-through rate of welding are improved. B is solder print.

The length of the first flexible connecting piece 5 and the second flexible connecting piece 7 can be set according to the welding length, which is shorter than the length of the first connecting piece 4 and the second connecting piece 6, so as to avoid short circuit caused by their contact with the external housing.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. The equivalent replacement or change of the new technical solution and the concept of the utility model shall be covered by the protection scope of the utility model.

Claims (10)

1. A full tab battery cover plate, characterized in that, comprising cover; The positive pole and the negative pole are installed on the cover in turn; The first support part is located on the side of the cover plate away from the positive pole, and it includes two first connecting pieces and two first flexible connecting pieces, and one end of the two first connecting pieces is connected to the cover plate; the two first connecting pieces The flexible connectors are respectively located on both sides of the two first connecting pieces, one end of the first flexible connecting piece is connected to the first connecting piece, and the other end is a free end; The second supporting part is located on the side of the cover plate away from the negative pole, which includes two second connecting pieces and two second flexible connecting pieces, and one end of the two second connecting pieces is connected to the cover plate; the two second connecting pieces The flexible connectors are respectively located on both sides of the two second connecting pieces, one end of the second flexible connecting piece is connected to the second connecting piece, and the other end is a free end. 2. The all-tab battery cover according to claim 1, wherein the first supporting part further includes a first pillar, the first pillar is "I" shaped, and the two first connecting pieces pass through the first pillar It is connected with the cover plate; the second support part also includes a second pillar, the second pillar is "I" shape, and the two second connecting pieces are connected with the cover plate through the second pillar. 3. The all-tab battery cover plate according to claim 2, wherein the first supporting part further comprises a first insulating member, the first insulating member is located between the first support and the cover plate, and the first insulating member and the first insulating member are Both the first pillar and the cover plate are connected; the second support part further includes a second insulating piece, the second insulating piece is located between the second pillar and the cover plate, and the second insulating piece is connected to the second pillar and the cover plate. 4 . The battery cover plate with all tabs according to claim 3 , wherein both the first insulating member and the second insulating member are made of corrosion-resistant high-polymer rubber material. 5. The all-tab battery cover according to claim 2, characterized in that, the first connecting piece, the first flexible connecting piece, and the first support are all made of pure aluminum; the second connecting piece, the second flexible Both the connecting piece and the second pillar are made of pure copper material. 6 . The all-tab battery cover according to claim 1 , wherein both the positive pole and the negative pole comprise a body and a rivet connected to the body. 7 . The all-tab battery cover plate according to claim 1 , wherein a positive pole mark is arranged on the cover plate. 8. The all-tab battery cover according to claim 1, wherein an identification code is provided on the cover. 9 . The all-tab battery cover according to claim 1 , wherein the first support part further comprises a first connecting piece, and the two first connecting pieces are connected through the first connecting piece. 10 . The all-tab battery cover according to claim 1 , wherein the second support part further comprises a second connecting piece, and the two second connecting pieces are connected through the second connecting piece. 11 .