CN220106685U

CN220106685U - Battery top cap subassembly and battery

Info

Publication number: CN220106685U
Application number: CN202320681995.7U
Authority: CN
Inventors: 段忠峰; 潘文成
Original assignee: Tianjin EV Energies Co Ltd
Current assignee: Tianjin EV Energies Co Ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-11-28
Anticipated expiration: 2033-03-31

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery top cover assembly and a battery, wherein the battery comprises the battery top cover assembly, and the battery top cover assembly comprises a top cover plate, a first insulating piece, a second insulating piece, a pole, a sealing ring, a heat insulation insulating ring and a heat conduction ring, wherein the pole sequentially penetrates through the first insulating piece and the top cover plate and protrudes out of the top cover plate; the second insulating piece is sleeved on the part of the pole protruding from the top cover plate; the sealing ring is arranged between the pole and the top cover sheet; and a heat insulation ring and a heat conduction ring are sleeved between the second insulating piece and the pole, and the heat conduction ring is sleeved with the heat insulation ring. The structure accelerates the heat dissipation of the pole, inhibits the heat conductivity between the second insulating part and the pole, avoids overheat of the second insulating part and improves the safety of the battery.

Description

Battery top cap subassembly and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery top cover assembly and a battery.

Background

Along with the rapid development of the fields of electric automobiles, energy storage and the like, the production and the use amount of the power battery are also rapidly developed, and aiming at the power battery, the important development targets at the present stage are high energy density and high safety. The existing battery top cover assembly is generally composed of a top cover plate, upper plastic, lower plastic, a sealing ring and a pole, wherein the upper plastic is provided with a pole fixing groove for fixing the pole, so that the upper plastic is in direct contact with the pole; when the internal transfer piece of battery and utmost point post laser welding, welding heat passes through the utmost point post and directly gives the plastic, can lead to plastic deformation, falls the material, and then leads to utmost point post leakproofness to reduce, the problem of electric core weeping, arouses the incident.

Therefore, there is a need to design a battery top cap assembly and a battery to solve the above technical problems.

Disclosure of Invention

An object of the present utility model is to provide a battery top cap assembly, which can accelerate the dissipation of the heat of the pole, and make the heat of the pole be dissipated before reaching the second insulating member, so as to improve the safety of the battery and reduce the cost.

To achieve the purpose, the utility model adopts the following technical scheme:

the battery top cover assembly comprises a top cover plate, a pole, a first insulating piece, a second insulating piece, a sealing ring, a heat insulation ring and a heat conduction ring, wherein,

the pole sequentially penetrates through the first insulating piece and the top cover piece and protrudes out of the top cover piece;

the second insulating piece is sleeved on the part of the pole protruding out of the top cover plate;

the sealing ring is arranged between the pole and the top cover sheet;

the heat insulation ring and the heat conduction ring are sleeved between the second insulating piece and the pole, and the heat insulation ring is sleeved on the heat conduction ring.

Optionally, the height of the heat conducting ring and the height of the heat insulating ring are not smaller than the height of the second insulating piece.

Optionally, the height of the heat insulation ring is not less than the height of the heat conduction ring.

Optionally, the heat conducting ring is made of a heat conducting metal material or a heat conducting insulating material.

Optionally, the heat-insulating ring is made of at least one material selected from heat-insulating plastics, heat-insulating mica and heat-insulating rubber.

Optionally, the heat conducting ring and the heat insulating ring are integrally formed.

Optionally, the heat insulation ring and the second insulating member are integrally formed.

Optionally, the heat conducting ring and the pole are integrally formed.

Optionally, the heat-insulating ring and the second insulating member are integrally formed, and the heat-conducting ring and the pole are integrally formed.

An object of the present utility model is to provide a battery, which can accelerate the dissipation of the heat of the pole, and make the heat of the pole be dissipated before reaching the second insulating member, so as to improve the safety of the battery and reduce the cost.

the battery comprises the battery top cover assembly.

The utility model has the beneficial effects that:

the utility model provides a battery top cover assembly and a battery, wherein the battery top cover assembly in the embodiment can realize insulation arrangement between a pole and a top cover sheet, and by arranging the heat insulation ring and the heat conduction ring, when the pole and the adapter sheet are welded, heat of the pole can be conducted to the heat conduction ring and part of the heat is emitted through the heat conduction ring, and the other part of the heat reaches the heat insulation ring.

Drawings

Fig. 1 is an exploded view of a battery top cap assembly according to an embodiment of the present utility model;

fig. 2 is a top view of a battery top cap assembly according to an embodiment of the present utility model.

Fig. 3 is a cross-sectional view of A-A in fig. 2.

In the figure:

10. a first insulating member; 20. a second insulating member; 30. a pole; 40. a seal ring; 50. a heat insulating ring; 60. a heat conducting ring; 200. a top cover sheet; 300. and a switching piece.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The embodiment provides a battery top cover assembly, which can accelerate the heat dissipation of the pole 30, and enable the heat of the pole 30 to be dissipated before reaching the second insulating member 20, thereby improving the safety of the battery and having lower cost.

Specifically, as shown in fig. 1 to 3, the battery top cap assembly includes a top cap plate 200, a first insulating member 10, a second insulating member 20, a post 30, a sealing ring 40, a heat insulating ring 50, and a heat conducting ring 60, wherein the post 30 sequentially penetrates the first insulating member 10, the top cap plate 200, and protrudes from the top cap plate 200; the second insulating member 20 is sleeved on the portion of the pole 30 protruding from the top cover 200; the seal ring 40 is disposed between the pole 30 and the top cover piece 200; a heat insulation ring 50 and a heat conduction ring 60 are sleeved between the second insulating member 20 and the pole 30, and the heat insulation ring 50 is sleeved on the heat conduction ring 60.

Through the structure, the battery top cover assembly in this embodiment can realize the insulation setting between the pole 30 and the top cover sheet 200, and through setting up insulating ring 50 and heat conducting ring 60, when making this pole 30 and the switching piece 300 weld, the heat of pole 30 can conduct to heat conducting ring 60 and dispel some heat through heat conducting ring 60, another part of heat reaches insulating ring 50, because insulating ring 50 has the thermal insulation ability, through insulating ring 50 separation most heat, and most heat can only dispel through insulating ring 60 and insulating ring 50, the heat that remains can not cause the damage to second insulating piece 20 when transmitting to second insulating piece 20 again, the heat transmission has been slowed down, and the heat that has weakened the transmission, make the heat that reaches second insulating piece 20 lower, the battery core weeping risk has been improved to insulating ring 50, the security of this battery top cover assembly has been improved, and the cost is lower.

Optionally, the height of the heat conducting ring 60 and the height of the heat insulating ring 50 are not smaller than the height of the second insulating member 20, so that the pole 30 can be ensured not to be in direct contact with the second insulating member 20, and further, the second insulating member 20 can be ensured not to be overheated and deformed, so that the safety problem caused by the damage of the battery tightness is avoided, and the safety of the battery top cover assembly is improved.

Further alternatively, the height of the heat insulation ring 50 is not smaller than the height of the heat conduction ring 60, so that the heat conduction ring 60 and the second insulating member 20 are not in direct contact, heat on the heat conduction ring 60 is further guaranteed not to influence the second insulating member 20, the phenomenon of overheat deformation of the second insulating member 20 is avoided, the safety problem caused by damage of the battery tightness is avoided, and the safety of the battery top cover assembly is improved.

In this embodiment, as shown in fig. 1, two groups of the above-mentioned pole 30, the second insulating member 20, the sealing ring 40, the heat insulation ring 50 and the heat conduction ring 60 are all arranged, and the two groups of the above-mentioned structures are arranged at intervals, wherein one group of the pole 30 is a positive pole, the other group of the pole 30 is a negative pole, and the positive pole and the negative pole can be used as the external output poles of the battery to which the top cover assembly of the battery belongs.

Optionally, through holes are correspondingly formed on the top cover 200, the first insulating member 10 and the second insulating member 20, so as to facilitate assembling the pole 30, the sealing ring 40, the insulating ring 50 and the heat conducting ring 60.

In this embodiment, the heat conducting ring 60 is made of a heat conducting metal material or a heat conducting insulating material, that is, the material for making the heat conducting ring 60 is not particularly limited, and only needs to have good heat conductivity, and a structure with low cost and good heat conducting effect can be used, which is not particularly limited herein.

Alternatively, the thermally conductive metal material is preferably different from the material of the pole 30 itself, and the thermally conductive effect is superior to that of the pole 30.

Optionally, the heat conducting and insulating material is preferably a ceramic material, has the advantages of high melting point, high hardness, high wear resistance, oxidation resistance and the like, has a good heat conducting effect, and has insulating characteristics.

Further, the insulating ring 50 is made of at least one material selected from the group consisting of insulating plastic, insulating mica and insulating rubber, i.e., the insulating ring 50 is required to satisfy the insulating property. For example, the insulating ring 50 may be a high temperature PI material. In addition, if the heat insulating ring 50 is capable of conducting heat at the same time, the heat in the heat conducting ring 60 can be dissipated for the second time, and the heat reaching the second insulating member 20 can be reduced.

In the first alternative embodiment, the heat conducting ring 60 and the heat insulating ring 50 are integrally formed, that is, they may be integrally formed by injection molding, etc., and the integral structural member may be disposed between the second insulating member 20 and the pole 30 during subsequent assembly, so that the assembly is convenient.

In a second alternative embodiment, the insulating ring 50 and the second insulating member 20 are integrally formed, that is, they may be integrally formed by injection molding, etc., and the heat conducting ring 60 may be disposed between the integral structural member and the pole 30 during subsequent assembly, so that the assembly is convenient.

In a third alternative embodiment, the heat conducting ring 60 and the pole 30 are integrally formed, i.e. they can be integrally formed by injection molding, etc., and the heat insulating ring 50 can be disposed between the integral structural member and the second insulating member 20 during subsequent assembly, so that the assembly is convenient.

In the fourth alternative embodiment, the heat conducting ring 60 and the pole 30 are integrally formed, the heat insulating ring 50 and the second insulating member 20 are integrally formed, and the two integrally formed structures can be directly assembled during subsequent assembly, so that the assembly is convenient.

In this embodiment, the sealing ring 40 is a common sealing structure such as a sealing ring, which is convenient to manufacture and has low cost.

In this embodiment, the battery top cover assembly further includes an explosion-proof valve (not shown in the figure) for releasing the internal pressure of the battery, so as to avoid the rapid increase of heat after the internal problem of the battery, and to increase the safety of the battery to which the battery top cover assembly belongs due to the explosion caused by the excessive internal pressure.

The embodiment also provides a battery, which includes the battery top cover assembly according to any one of the above schemes, so that the heat of the pole 30 can be accelerated to be dissipated, and the heat of the pole 30 can be dissipated before reaching the second insulating member 20, thereby improving the safety of the battery and reducing the cost.

Optionally, as shown in fig. 1 and fig. 3, the battery further includes a housing (not shown in the drawings), a battery core (not shown in the drawings), and two adapter plates 300, where the battery core and the two adapter plates 300 are both disposed in the housing, the battery top cover assembly covers the opening end of the housing, one ends of the two adapter plates 300 are both electrically connected to the pole 30, and the other ends are respectively electrically connected to the positive electrode and the negative electrode of the battery core, so as to realize the electrical connection between the pole 30 and the battery core.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims

1. The battery top cap subassembly, its characterized in that includes: a top cover sheet (200), a pole (30), a first insulating member (10), a second insulating member (20), a seal ring (40), a heat insulating ring (50) and a heat conducting ring (60), wherein,

the pole (30) sequentially penetrates through the first insulating piece (10) and the top cover sheet (200) and protrudes out of the top cover sheet (200);

the second insulating piece (20) is sleeved on the part of the pole (30) protruding out of the top cover sheet (200);

the sealing ring (40) is arranged between the pole (30) and the top cover sheet (200);

the heat insulation ring (50) and the heat conduction ring (60) are sleeved between the second insulating piece (20) and the pole (30), and the heat insulation ring (50) is sleeved on the heat conduction ring (60).

2. The battery top cap assembly according to claim 1, wherein the height of the heat conduction ring (60) and the height of the heat insulation ring (50) are not smaller than the height of the second insulating member (20).

3. The battery top cap assembly according to claim 2, wherein the height of the heat insulating ring (50) is not less than the height of the heat conducting ring (60).

4. The battery top cap assembly according to claim 1, wherein the heat conductive ring (60) is made of a heat conductive metal material or a heat conductive insulating material.

5. The battery top cover assembly according to claim 1, wherein the insulating ring (50) is made of at least one material of insulating plastic, insulating mica, and insulating rubber.

6. The battery top cover assembly according to any one of claims 1-5, wherein the thermally conductive ring (60) is integrally formed with the thermally insulating ring (50).

7. The battery top cover assembly according to any one of claims 1 to 5, wherein the heat insulating ring (50) and the second insulating member (20) are integrally provided.

8. The battery top cap assembly of any of claims 1-5, wherein the thermally conductive ring (60) is integrally formed with the post (30).

9. The battery top cap assembly of any of claims 1-5, wherein the insulating ring (50) and the second insulator (20) are integrally formed, and the thermally conductive ring (60) is integrally formed with the post (30).

10. A battery comprising the battery top cap assembly of any one of claims 1-9.