CN212033053U

CN212033053U - Power battery cover plate structure and battery

Info

Publication number: CN212033053U
Application number: CN202021135826.6U
Authority: CN
Inventors: 许久凌; 张勇杰
Original assignee: China Aviation Lithium Battery Co Ltd; China Aviation Lithium Battery Research Institute Co Ltd
Current assignee: Avic Innovation Technology Research Institute Jiangsu Co ltd; China Aviation Lithium Battery Co Ltd; China Lithium Battery Technology Co Ltd; CALB Technology Co Ltd
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2020-11-27
Anticipated expiration: 2030-06-18

Abstract

The disclosure relates to the technical field of batteries and provides a power battery cover plate structure and a battery. The power battery cover plate structure comprises a cover plate and a pole, wherein the pole comprises a main body part and a connecting part, the main body part is arranged on the cover plate, and the connecting part is directly connected with the cover plate. This power battery cover plate structure of disclosure is through being connected the connecting piece of utmost point post directly with the apron, has got rid of the last plastic that sets up between utmost point post and apron among the prior art promptly to reduce the spare part of power battery cover plate structure, solved the more problem of spare part of battery cover plate structure among the prior art.

Description

Power battery cover plate structure and battery

Technical Field

The disclosure relates to the technical field of batteries, in particular to a power battery cover plate structure and a battery.

Background

The battery cover plate structure in the prior art is composed of a cover plate, a pole, upper plastic, lower plastic, a sealing ring and a current collector, all parts of the whole battery cover plate structure need to be sequentially installed, and the assembly process is complex due to the fact that the structure is multiple.

SUMMERY OF THE UTILITY MODEL

The present disclosure provides a power battery cover plate structure and a battery to solve the problem that the number of parts of the battery cover plate structure in the prior art is large.

According to the utility model discloses a first aspect provides a power battery cover plate structure, include:

a cover plate;

the utmost point post, utmost point post include main part spare and connecting piece, and the main part spare sets up on the apron, and the connecting piece is direct to be connected with the apron.

The utility model discloses power battery cover plate structure is directly connected with the apron through the connecting piece with utmost point post, has got rid of the last plastic that sets up between utmost point post and apron among the prior art promptly to reduce the spare part of power battery cover plate structure, solved the more problem of spare part of battery cover plate structure among the prior art.

According to a second aspect of the present invention, a battery is provided, comprising the above-mentioned power battery cover plate structure.

The utility model discloses the battery is directly connected with the apron through the connecting piece with utmost point post, has got rid of the last plastic that sets up between utmost point post and apron among the prior art promptly to reduce the spare part of power battery cover plate structure, simplified battery assembly process.

Drawings

Various objects, features and advantages of the present disclosure will become more apparent from the following detailed description of preferred embodiments thereof, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary illustrations of the disclosure and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:

fig. 1 is a schematic view illustrating an assembly structure of a cover plate and a terminal of a battery cover plate structure according to an exemplary embodiment;

FIG. 2 is a schematic cross-sectional view of one embodiment at A-A of FIG. 1;

FIG. 3 is an enlarged schematic view of the structure at B in FIG. 2;

FIG. 4 is an enlarged schematic view of the structure at C in FIG. 2;

fig. 5 is a schematic cross-sectional view of another embodiment at a-a in fig. 1.

The reference numerals are explained below:

10. a cover plate; 11. a second connecting portion; 12. mounting a boss; 13. a through hole; 14. an accommodating recess; 20. a pole column; 21. a main body member; 22. a connecting member; 221. a first connection portion; 222. recessing; 30. an insulating member; 31. installing a groove; 40. a coating portion; 50. a seal member; 51. a first seal segment; 52. a second seal segment; 53. and a third seal section.

Detailed Description

Exemplary embodiments that embody features and advantages of the present disclosure are described in detail below in the specification. It is to be understood that the disclosure is capable of various modifications in various embodiments without departing from the scope of the disclosure, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.

In the following description of various exemplary embodiments of the disclosure, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the disclosure may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present disclosure. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the disclosure, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples in the figures. The plurality described in this disclosure is at least 2. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of this disclosure.

An embodiment of the utility model provides a power battery cover plate structure, please refer to fig. 1 to 5, power battery cover plate structure includes: a cover plate 10; the pole 20, the pole 20 includes a main body part 21 and a connecting part 22, the main body part 21 is disposed on the cover plate 10, and the connecting part 22 is directly connected with the cover plate 10.

The utility model discloses a power battery cover plate structure is directly connected with apron 10 through the connecting piece 22 with utmost point post 20, has got rid of the last plastic that sets up between utmost point post 20 and apron 10 among the prior art promptly to reduce the spare part of power battery cover plate structure, solved the more problem of spare part of battery cover plate structure among the prior art.

It should be noted that the connecting member 22 is directly connected to the cover plate 10, that is, an upper plastic is not disposed between the connecting member 22 and the cover plate 10, as in the prior art, and since the upper plastic itself is a separate component, it needs to be separately formed and separately installed. In the embodiment, the connecting member 22 is directly connected to the cover plate 10, for example, the connecting member 22 and the cover plate 10 are connected by an adhesive, although the adhesive is a third product independent from the connecting member 22 and the cover plate 10, since the adhesive is mainly used for connecting the connecting member 22 and the cover plate 10, and it cannot form a separate component when applied to a power cell cover plate structure (the separate component is referred to as the connecting member 22, the cover plate 10, etc.), at this time, the connecting member 22 and the cover plate 10 can still be understood as being directly connected.

In one embodiment, the body member 21 may be provided on the surface of the cover plate 10. Alternatively, part of the body member 21 is located within the cover plate 10.

In one embodiment, as shown in fig. 3, the connecting member 22 is provided with a first connecting portion 221, the cover plate 10 is provided with a second connecting portion 11, and the first connecting portion 221 is connected with the second connecting portion 11, so that the connecting member 22 and the cover plate 10 are reliably connected.

In one embodiment, the first connection portion 221 is a protrusion, the second connection portion 11 is a groove, and the protrusion is inserted into the groove; or, the first connecting portion 221 is a groove, and the second connecting portion 11 is a protrusion, and the protrusion is inserted into the groove. The arrangement of the protrusions and the grooves ensures a stable connection of the connection member 22 and the cover plate 10.

In one embodiment, the first connection portions 221 are provided in plurality, the first connection portions 221 are spaced apart from each other, the second connection portions 11 are provided in plurality, and the first connection portions 221 and the second connection portions 11 are provided in one-to-one correspondence, so that the connection members 22 can be stably connected to the cover plate 10.

In one embodiment, the connecting member 22 is disposed around the circumferential outer edge of the body member 21, and the plurality of first connecting portions 221 are disposed at intervals on the connecting member 22 so as to surround the body member 21.

In one embodiment, as shown in fig. 3, the first connection portion 221 protrudes outward toward one side of the cover plate 10 with respect to the connection member 22 to form a recess 222 at the other side of the connection member 22 away from the cover plate 10; the second connecting portion 11 is recessed inward with respect to one surface of the cover plate 10 facing the connecting member 22 to form a mounting protrusion 12 on the other surface of the cover plate 10 facing away from the connecting member 22. When the first connecting portion 221 is a protrusion, the protrusion has a cavity inside, such as a recess 222, and when the second connecting portion 11 is a groove, the portion forming the groove has an outwardly protruding structure, such as a mounting protrusion 12, and the cavity inside the mounting protrusion 12 is a groove. The first connection portion 221 and the second connection portion 11 may be formed by stamping or by other manufacturing methods, such as machining, and are not limited herein.

In one embodiment, as shown in fig. 2 and 3, the power battery cover plate structure further includes: the insulating part 30, insulating part 30 set up the side that deviates from connecting piece 22 at apron 10, are provided with mounting groove 31 on the insulating part 30, and the installation arch 12 is inserted and is established in mounting groove 31. The connection member 22 is connected to the second connection portion 11 of the cap plate 10 by the first connection portion 221, and the mounting protrusion 12 of the cap plate 10 is inserted into the mounting groove 31 of the insulation member 30, so that the connection member 22, the cap plate 10, and the insulation member 30 are connected in sequence.

In one embodiment, the first connection portion 221 is a protrusion, the second connection portion 11 is a groove, the mounting protrusion 12 forming the second connection portion 11 is inserted into the mounting groove 31, and the insulating member 30 for forming the mounting groove 31 may also be outwardly protruded.

In one embodiment, the connection member 22 is connected to the cover plate 10 by a press riveting process, which can provide installation efficiency while ensuring stable connection.

In one embodiment, after the connection member 22 is overlapped with the cover plate 10, the connection member 22 is impacted with the cover plate 10 by a punching mechanism to thereby achieve plastic deformation of the connection member 22 with the cover plate 10, thereby stably connecting the first connection portion 221 into the second connection portion 11. The punch riveting process similarly punches the connector 22 with a rivet so that the connector 22 deforms to securely contact the deformed cover plate 10 to form a connected relationship, and the rivet ultimately needs to be retrieved.

In one embodiment, the first connection portion 221 and the second connection portion 11 are formed by a press-riveting process, and the recess 222 and the mounting protrusion 12 are also formed during the pressing process accordingly.

In one embodiment, as shown in fig. 5, the cover plate 10 is provided with a through hole 13 and a receiving groove 14, the main body member 21 is inserted into the through hole 13, and at least a portion of the connecting member 22 is disposed in the receiving groove 14. The arrangement of the accommodating groove 14 can ensure that the connecting member 22 can be quickly positioned on the cover plate 10, and the overall structure of the power battery cover plate structure can be reduced, and the installation stability of the connecting member 22 and the cover plate 10 can be further improved.

In one embodiment, as shown in fig. 5, the power cell cover structure further comprises: at least one of the coating portion 40, the connecting member 22 and the cover plate 10 is coated with the coating portion 40, and the coating portion 40 is used for isolating the connecting member 22 from the cover plate 10, that is, the coating portion 40 is used for realizing electrical isolation between the connecting member 22 and the cover plate 10, where the electrical isolation may be complete insulation or semi-insulation, that is, the resistance value between the connecting member 22 and the cover plate 10 is increased.

It should be noted that the coating portion 40 is coated on the connecting member 22 and the cover plate 10, that is, it does not belong to an independent component of the power battery cover plate structure, so the connecting member 22 and the cover plate 10 are directly connected although the coating portion 40 is present between the connecting member 22 and the cover plate 10.

In one embodiment, the coating portion 40 may be an inorganic oxide, such as alumina, magnesia, zirconia, silica, etc., a polymer material, such as PP, PE, teflon, resin, etc., a ceramic material, paint, carbide, such as silicon carbide, tungsten carbide, etc.

In one embodiment, before the pole 20 is mounted with the cap plate 10, the surface of the connection member 22 is coated with the coating portion 40, and then the connection of the connection member 22 and the cap plate 10 is achieved through a press-riveting process.

In one embodiment, the post 20 is used to connect with a positive post terminal, where the coating 40 is a positive resistance, i.e., the coating 40 is semi-insulating with respect to the connector 22 and the cover plate 10.

In one embodiment, the post 20 is used to connect to a negative post terminal, where the coating 40 is a negative insulator, i.e., the coating 40 is completely insulated from the connector 22 and the cover plate 10. Wherein the adjacent portions of the connection member 22 and the cap plate 10 are required to be coated with the coating portion 40, so as to ensure reliable electrical isolation.

In one embodiment, as shown in fig. 2 and 4, the power battery cover plate structure further includes: the sealing element 50 comprises a first sealing section body 51 and a second sealing section body 52, wherein the first sealing section body 51 is arranged between the main body piece 21 and the cover plate 10 in a clamping mode, and the second sealing section body 52 is arranged between the connecting piece 22 and the cover plate 10 in a clamping mode. The sealing member 50 can ensure sealability between the cover plate 10 and the pole post 20, and can achieve reliable electrical isolation between the body member 21 and the cover plate 10.

In one embodiment, as shown in fig. 4, the sealing member 50 further includes a third sealing segment body 53, the third sealing segment body 53 is connected to the second sealing segment body 52, the third sealing segment body 53 is located in the cover plate 10, the first sealing segment body 51 and the third sealing segment body 53 are respectively connected to two ends of the second sealing segment body 52, and the extending directions of the first sealing segment body 51 and the third sealing segment body 53 are the same.

In one embodiment, the pole post 20 includes a body member 21 and a connection member 22, the body member 21 serves to electrically connect the inside and the outside of an electrode assembly including a positive electrode tab, a separator and a negative electrode tab of a thin layer or sheet, and the connection member 22 is fixedly connected to the cap plate 10. In this case, the surface of the connecting member 22 is subjected to an insulation treatment, that is, the surface of the connecting member 22 is coated with the coating portion 40, while the main body member 21 is not subjected to the insulation treatment. The connecting member 22 is fixed to the cap plate 10 by a press-riveting connection, and realizes a physical connection therebetween, and prevents the connecting member 22 from being electrically connected to the cap plate 10 by an insulation treatment design. The airtightness is ensured by compressing the sealing member 50 between the pole 20 and the cover plate 10, wherein the sealing member 50 is a sealing ring.

The utility model discloses power battery cover plate structure can reduce spare part, simplifies assembly process, practices thrift the cost.

An embodiment of the utility model also provides a battery, including foretell power battery cover plate structure.

The utility model discloses a battery of embodiment is directly connected with apron 10 through the connecting piece 22 with utmost point post 20, has got rid of the last plastic that sets up between utmost point post 20 and apron 10 among the prior art promptly to reduce the spare part of power battery cover plate structure, simplified battery assembly process.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and exemplary embodiments be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A power battery cover plate structure, comprising:

a cover plate (10);

the pole column (20), the pole column (20) comprises a main body part (21) and a connecting part (22), the main body part (21) is arranged on the cover plate (10), and the connecting part (22) is directly connected with the cover plate (10).

2. The power battery cover plate structure according to claim 1, wherein a first connecting portion (221) is provided on the connecting member (22), a second connecting portion (11) is provided on the cover plate (10), and the first connecting portion (221) is connected with the second connecting portion (11).

3. The power battery cover plate structure according to claim 2, wherein the first connecting portion (221) is a protrusion, the second connecting portion (11) is a groove, and the protrusion is inserted into the groove; or, the first connecting part (221) is a groove, the second connecting part (11) is a protrusion, and the protrusion is inserted into the groove.

4. The power battery cover plate structure according to claim 2, wherein the first connecting part (221) protrudes outward relative to the connecting part (22) toward one side of the cover plate (10) to form a recess (222) on the other side of the connecting part (22) away from the cover plate (10);

the second connecting part (11) is recessed inwards relative to one surface of the cover plate (10) facing the connecting part (22) so as to form a mounting protrusion (12) on the other surface of the cover plate (10) facing away from the connecting part (22).

5. The power cell cover plate structure of claim 4, further comprising:

the insulation piece (30), the insulation piece (30) sets up apron (10) deviates from one side of connecting piece (22), be provided with mounting groove (31) on insulation piece (30), installation arch (12) are inserted and are established in mounting groove (31).

6. Power cell cover plate structure according to any of claims 1 to 5, characterized in that the connection piece (22) is connected with the cover plate (10) using a punch riveting process.

7. Power battery cover plate structure according to any one of claims 1 to 5, characterized in that the cover plate (10) is provided with a through hole (13) and a receiving groove (14), the main body piece (21) is arranged in the through hole (13) in a penetrating way, and at least part of the connecting piece (22) is arranged in the receiving groove (14).

8. The power cell cover plate structure of any one of claims 1 to 5, further comprising:

the connecting piece (22) and the cover plate (10) are arranged in the connecting piece, the coating part (40) is coated on at least one of the connecting piece (22) and the cover plate (10), and the coating part (40) is used for isolating the connecting piece (22) and the cover plate (10).

9. The power cell cover plate structure of any one of claims 1 to 5, further comprising:

the sealing element (50) comprises a first sealing section body (51) and a second sealing section body (52), the first sealing section body (51) is arranged between the main body piece (21) and the cover plate (10) in a clamped mode, and the second sealing section body (52) is arranged between the connecting piece (22) and the cover plate (10) in a clamped mode.

10. A battery comprising a power battery cover structure according to any one of claims 1 to 9.