CN219717039U

CN219717039U - Lithium ion battery cover plate

Info

Publication number: CN219717039U
Application number: CN202320903722.2U
Authority: CN
Inventors: 李晓俊; 张峥; 汪弯; 戴敏
Original assignee: Hefei Guoxuan High Tech Power Energy Co Ltd
Current assignee: Hefei Gotion High Tech Power Energy Co Ltd
Priority date: 2023-04-18
Filing date: 2023-04-18
Publication date: 2023-09-19
Anticipated expiration: 2033-04-18

Abstract

The utility model discloses a lithium ion battery cover plate, and belongs to the technical field of lithium ion batteries. Through holes for connecting the positive electrode lug and the negative electrode lug are formed in two ends of the cover plate, a first protective cover and a second protective cover which are hinged together are arranged on the through holes, and the positive electrode lug and the negative electrode lug are respectively positioned between the first protective cover and the second protective cover after passing through the through holes; the first protective cover and the second protective cover can move along the surface of the cover plate, and the second protective cover can rotate around the hinge. The cover plate is provided with a fixing plate, and the fixing plate is positioned on one side of the through hole. One side of the fixed plate, which is close to the through hole, is provided with a first elastic piece, and the other end of the first elastic piece is connected with a first protection cover. The fixing plate is further provided with a connecting block, and the second protective cover can be fixed on the connecting block after rotating. The utility model has the main purpose of facilitating the maintenance and recovery of the battery.

Description

Lithium ion battery cover plate

Technical Field

The utility model relates to the technical field of lithium ion batteries, in particular to a lithium ion battery cover plate.

Background

The lithium ion battery consists of a shell, a battery bare core (formed by separating a plurality of positive and negative pole pieces by a diaphragm) and a cover plate, wherein the battery bare core is arranged in the shell, and meanwhile, the lithium ion battery has the advantages of large capacity, light weight, long cycle life, high energy density, no memory, environmental friendliness and the like, so that the lithium ion battery is widely applied to various fields such as electric automobiles, electric bicycles, energy storage systems and the like.

Because of the increasingly reduced energy sources in the modern society and the increasingly severe atmospheric environment, the requirements of people on the energy sources are increasingly high, and the lithium ion battery has little harm to the environment in the production and manufacturing process, has high recovery value after the service life is ended and does not pollute the environment. Therefore, recycling of the battery is very important.

The cover plate is an important part in the battery, and the existing cover plate structure comprises an aluminum plate, a pole column, an explosion-proof valve and a liquid injection hole. The explosion-proof valve plays a role in safety protection, and the sealing nail and the liquid injection hole are welded together in a laser welding mode, so that the sealing of the battery is ensured. The cover plate structure needs laser welding equipment, so that equipment investment is large, energy consumption is high, meanwhile, the lithium ion battery can consume internal electrolyte in a long-time use process, and the electrolyte needs to be supplemented to prolong the service life of the battery. And after the liquid injection hole and the sealing nail of the battery are welded, the battery becomes a whole, and the subsequent battery core is inconvenient to maintain in liquid supplementing.

In addition, when the battery is externally connected, the connecting wires are required to be arranged on the positive and negative lugs, and the wires are usually welded with the positive and negative lugs respectively for the stability of the connection of the wires and the positive and negative lugs. Through this kind of connected mode, when retrieving the electric core, need separate wire and positive negative pole ear, because welded connection's specificity, the separation can lead to positive negative pole ear damage, if serious, can cause whole electric core unable reuse.

Disclosure of Invention

1. Technical problem to be solved by the utility model

Aiming at the problem that the lithium battery cover plate structure in the prior art is not beneficial to battery maintenance and recovery, the utility model provides the lithium ion battery cover plate, so that the maintenance and recovery of the battery are more convenient.

2. Technical proposal

In order to achieve the above purpose, the technical scheme provided by the utility model is as follows:

the lithium ion battery cover plate is characterized in that through holes for connecting the positive electrode lug and the negative electrode lug are formed in two ends of the cover plate, a first protective cover and a second protective cover which are hinged together are arranged on the through holes, and the positive electrode lug and the negative electrode lug are respectively positioned between the first protective cover and the second protective cover after passing through the through holes; the first protective cover and the second protective cover can move along the surface of the cover plate, and the second protective cover can rotate around the hinge.

Further, a fixing plate is arranged on the cover plate and is located on one side of the through hole.

Further, one side of the fixing plate, which is close to the through hole, is provided with a first elastic piece, and the other end of the first elastic piece is connected with a first protection cover.

Further, the fixing plate is further provided with a connecting block, and the second protective cover can be fixed on the connecting block after rotating.

Further, the first protective cover and the second protective cover are semicircular, and are combined into a whole to be sleeved on the positive electrode lug and the negative electrode lug respectively.

Further, the side face, close to the lug, of the first protection cover is provided with an arc-shaped groove, and the side face, close to the lug, of the second protection cover is provided with a notch.

Further, the cover plate is also provided with a liquid injection hole, a liquid injection groove is arranged in the liquid injection hole, an opening is formed in one side, close to the liquid injection hole, of the liquid injection groove, and a liquid outlet hole is formed in the side face of the liquid injection groove.

Further, a sliding block is arranged in the liquid injection groove, and a second elastic piece is connected between the sliding block and the bottom of the liquid injection groove; an inclined plane is formed on the inner side of the opening of the liquid injection groove, and the opening of the liquid injection groove is gradually reduced from inside to outside by the inclined plane; and the sliding block is provided with a chamfer matched with the inclined plane.

Further, the sliding block can move in the liquid injection groove; when the sliding block is positioned at the opening, the sliding block can seal the opening of the liquid injection groove; when the sliding block is positioned at the bottom of the liquid injection groove, the opening of the liquid injection groove is communicated with the liquid outlet hole.

Further, an explosion-proof valve is further arranged on the cover plate.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

(1) According to the lithium ion battery cover plate, the first protective cover and the second protective cover are arranged on the outer side of the lug and used for fixing the protective wire, so that the detachable connection between the lug and the wire is realized, the wire is not welded on the lug, the disassembly and the installation of the wire are convenient, the maintenance and the recovery of a battery are convenient, and the damage to the lug can be avoided when the wire is disassembled and assembled.

(2) According to the lithium ion battery cover plate, the first protective cover and the second protective cover can move along the surface of the cover plate, the second protective cover can rotate around the hinge, the tab can be exposed after the second protective cover is rotated, and the operation of installing or detaching the lead is carried out, so that the operation process is very convenient.

(3) According to the lithium ion battery cover plate, the connecting blocks are arranged on the fixing plate, the fixing plate is connected with the first protective cover through the first elastic piece, the structure is simple, and the first protective cover and the second protective cover surround the electrode lugs and are separated from the electrode lugs conveniently and laborsaving.

(4) According to the lithium ion battery cover plate, the arc-shaped groove is formed in the first protective cover, the notch is formed in the second protective cover, and after the lead is wound on the tab, the lead is positioned in the arc-shaped groove and the notch, so that the lead is prevented from being excessively pressed to be broken.

(5) According to the lithium ion battery cover plate, the sliding block is arranged in the liquid injection groove and can move back and forth in the liquid injection groove, and the sliding block is used for sealing the opening of the liquid injection groove and opening the liquid injection groove. When electrolyte is needed to be supplemented, the electrolyte can be supplemented without dismantling the cover plate, the structure is simple, the operation is convenient, the working efficiency is improved, and the recycling of the battery is very convenient.

Drawings

FIG. 1 is a perspective view of the overall structure of the present utility model;

FIG. 2 is an enlarged schematic view of FIG. 1 at A;

FIG. 3 is a perspective view of another view of the overall structure of the present utility model;

FIG. 4 is a schematic diagram of a semi-sectional structure of a liquid injection tank according to the present utility model;

FIG. 5 is a schematic diagram showing a half-sectional structure of a first semicircular fixing block according to the present utility model.

Reference numerals in the schematic drawings illustrate:

1. a cover plate; 2. a fixing plate; 3. a connecting block; 4. a first elastic member; 5. a first protective cover; 6. a negative electrode ear; 7. a second protective cover; 8. an explosion-proof valve; 9. a liquid injection groove; 10. a positive electrode tab; 11. a slide block; 12. a second elastic member; 13. a liquid outlet hole; 14. an arc-shaped groove; 15. a liquid injection hole; 16. and (5) a notch.

Detailed Description

For a further understanding of the present utility model, the present utility model will be described in detail with reference to the drawings and examples.

Examples

As shown in fig. 1, a cover plate of a lithium ion battery is provided with an explosion-proof valve 8 on the cover plate 1. The two ends of the cover plate 1 are also provided with through holes for connecting the lugs, and the lugs are divided into positive lugs 10 and negative lugs 6. The two through holes are provided with a first protective cover 5 and a second protective cover 7 which are hinged together, and the first protective cover 5 and the second protective cover 7 are made of insulating materials. In this embodiment, the first protection cover 5 and the second protection cover 7 are both semicircular, and form a circle after being surrounded by the two, and the positive tab 10 and the negative tab 6 are respectively located in the circles surrounded by the first protection cover 5 and the second protection cover 7 after passing through the through hole. Wherein the first protective cover 5 and the second protective cover 7 are movable along the surface of the cover plate 1 and the second protective cover 7 is rotatable about the hinge. The first protective cover 5 and the second protective cover 7 can be hinged together by a pin, and the second protective cover 7 can rotate around the pin.

As shown in fig. 2, a fixing plate 2 is disposed on the cover plate 1, and the fixing plate 2 is located at one side of the through hole. The fixing plate 2 is also made of an insulating material. One side of the fixed plate 2 close to the through hole is provided with a first elastic piece 4, and the other end of the first elastic piece 4 is connected with a first protection cover 5. In the present embodiment, the first elastic member 4 uses springs, and the number is set to two. In other cases, of course, other elastic members, such as rubber, may be used for the first elastic member 4. The fixing plate 2 is further provided with a connecting block 3, so that the second protective cover 7 can be fixed on the connecting block 3 after rotating.

In this embodiment, as shown in fig. 5, the side surface of the first protection cover 5, which is close to the tab, is provided with an arc-shaped groove 14, and the side surface of the second protection cover 7, which is close to the tab, is provided with a notch 16. When the positive electrode lug 10 and the negative electrode lug 6 are externally connected, wires are wound on the positive electrode lug 10 and the negative electrode lug 6 and are positioned in the arc-shaped groove 14 and the notch 16. The notch 16 is arranged near the cover plate 1, and the position, which is not provided with the notch 16, of the side surface of the second protective cover 7 near the tab is attached to the tab.

Specifically, when in use, the cover plate 1 is fixed with the battery box, taking the negative electrode lug 6 as an example, the lead is installed on the negative electrode lug 6 in such a way that the second protective cover 7 is rotated outwards and the first protective cover 5 is pushed, so that the first protective cover 5 extrudes the first elastic piece 4, the second protective cover 7 is sleeved on the connecting block 3 to fix the connecting block, at the moment, the upper end of the negative electrode lug 6 is completely exposed, and the lead is wound outside the negative electrode lug 6. After the winding of the wire is completed, the second protective cover 7 is separated from the connecting block 3, the pressure of the first elastic piece 4 is released, the first protective cover 5 is pushed to be close to the negative electrode lug 6 under the action of the first elastic piece 4, the wire is positioned in the arc-shaped groove 14, and the arc-shaped groove 14 is used for placing the wire, so that the wire cannot be excessively pressed to cause fracture. And then the second protective cover 7 is rotated back to the other side of the negative electrode lug 6, and the lead close to the second protective cover 7 is positioned in the notch 16, and as the notch 16 is not arranged on the side surface of the second protective cover 7 close to the electrode lug and is attached to the electrode lug, the second protective cover 7 has a certain extrusion effect with the negative electrode lug 6 in the rotating process, so that the second protective cover 7 can be tightly sleeved outside the negative electrode lug 6, and the lead is fixed more tightly and is not easy to loose. Similarly, the arrangement of the outer side of the positive electrode tab 10 and the lead mounting method are identical to those of the negative electrode tab 6. Because the second protective cover 7 and the first protective cover 5 are both made of insulating materials, electric leakage is not easy to occur, and the safety is high. In this embodiment, the wire need not weld on the utmost point ear, has made things convenient for the dismantlement and the installation of wire, can not cause the damage to the utmost point ear when dismantling and installing moreover, makes the maintenance and the recovery of battery more convenient.

As shown in fig. 3 and 4, the cover plate 1 is further provided with a liquid injection hole 15, and a liquid injection groove 9 is installed in the liquid injection hole 15. In this embodiment, the liquid injection hole 15 is square, and the liquid injection groove 9 is also square due to the matching with the liquid injection hole 15. The side of the liquid injection groove 9, which is close to the liquid injection hole 15, is provided with an opening, and the side surface of the liquid injection groove 9 is provided with a liquid outlet hole 13. The liquid outlet holes 13 are two, in particular rectangular holes, arranged on two opposite sides of the liquid injection groove 9.

The liquid injection groove 9 is internally provided with a sliding block 11, a second elastic piece 12 is connected between the sliding block 11 and the bottom of the liquid injection groove 9, and a plurality of second elastic pieces 12 can be arranged according to the sealing requirement by using springs. The inner side of the opening of the liquid injection groove 9 is provided with an inclined plane, the opening of the liquid injection groove 9 is gradually reduced from inside to outside, meanwhile, the sliding block 11 is also provided with a chamfer matched with the inclined plane, and the side surface of the sliding block 11 is trapezoidal due to the chamfer. The slide 11 is movable in the liquid injection groove 9. The second elastic piece 12 is always in a compressed state, and when the sliding block 11 is positioned at the opening, the sliding block 11 can seal the opening of the liquid injection groove 9; when an external force is applied to move the slider 11 to be positioned at the bottom of the liquid injection groove 9, the opening of the liquid injection groove 9 is communicated with the liquid outlet hole 13.

Specifically, after a battery is used for a certain period of time, the electrolyte in the battery may be consumed. When electrolyte is needed to be replenished, an external force is applied to push the sliding block 11 and squeeze the second elastic piece 12 until the sliding block 11 moves to the bottom of the liquid injection groove 9, the liquid outlet hole 13 is exposed, the opening of the liquid injection groove 9 is communicated with the liquid outlet hole 13, the electrolyte is injected through the opening of the liquid injection groove 9, and the electrolyte flows into the battery through the liquid outlet hole 13. After the electrolyte is supplemented, external force is applied to remove, and the pressure of the second elastic piece 12 pushes the sliding block 11 to the opening of the liquid injection groove 9, so that the liquid injection groove 9 is completely closed. In this embodiment, the slider 11 can make the sealing of the liquid injection groove 9 better, and the leakage short circuit is less likely to occur. And when electrolyte is needed to be supplemented, the electrolyte can be supplemented without dismantling the cover plate 1, so that the battery can be reused conveniently, the structure is simple, the operation is convenient, and the working efficiency is improved.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims

1. A lithium ion battery cover plate, characterized in that: the cover plate (1) is provided with a through hole for connecting the positive electrode lug (10) and the negative electrode lug (6), the through hole is provided with a first protective cover (5) and a second protective cover (7) which are hinged together, and the positive electrode lug (10) and the negative electrode lug (6) respectively are positioned between the first protective cover (5) and the second protective cover (7) after passing through the through hole; the first protective cover (5) and the second protective cover (7) can move along the surface of the cover plate (1), and the second protective cover (7) can rotate around the hinge joint.

2. The lithium ion battery cover plate according to claim 1, wherein: the cover plate (1) is provided with a fixing plate (2), and the fixing plate (2) is positioned on one side of the through hole.

3. A lithium ion battery cover plate according to claim 2, wherein: one side of the fixed plate (2) close to the through hole is provided with a first elastic piece (4), and the other end of the first elastic piece (4) is connected with a first protection cover (5).

4. A lithium ion battery cover plate according to claim 2, wherein: the fixing plate (2) is further provided with a connecting block (3), and the second protective cover (7) can be fixed on the connecting block (3) after rotating.

5. The lithium ion battery cover plate according to claim 4, wherein: the first protective cover (5) and the second protective cover (7) are semicircular, and are combined into a whole to be sleeved on the positive electrode lug (10) and the negative electrode lug (6) respectively.

6. A lithium ion battery cover plate according to any one of claims 1-5, wherein: the side that first visor (5) is close to with the utmost point ear sets up arc wall (14), the side that second visor (7) is close to with the utmost point ear sets up breach (16).

7. The lithium ion battery cover plate according to claim 6, wherein: the cover plate (1) is also provided with a liquid injection hole (15), a liquid injection groove (9) is arranged in the liquid injection hole (15), an opening is formed in one side, close to the liquid injection hole (15), of the liquid injection groove (9), and a liquid outlet hole (13) is formed in the side face of the liquid injection groove (9).

8. The lithium ion battery cover plate according to claim 7, wherein: a sliding block (11) is arranged in the liquid injection groove (9), and a second elastic piece (12) is connected between the sliding block (11) and the bottom of the liquid injection groove (9); an inclined plane is formed at the inner side of the opening of the liquid injection groove (9), and the opening of the liquid injection groove (9) is gradually reduced from inside to outside; the slide block (11) is provided with a chamfer matched with the inclined plane.

9. The lithium ion battery cover plate according to claim 8, wherein: the sliding block (11) can move in the liquid injection groove (9); when the sliding block (11) is positioned at the opening, the sliding block (11) can seal the opening of the liquid injection groove (9); when the sliding block (11) is positioned at the bottom of the liquid injection groove (9), the opening of the liquid injection groove (9) is communicated with the liquid outlet hole (13).

10. The lithium ion battery cover plate according to claim 1, wherein: an explosion-proof valve (8) is further arranged on the cover plate (1).