CN219591613U

CN219591613U - Secondary battery post structure and battery pack

Info

Publication number: CN219591613U
Application number: CN202320688408.7U
Authority: CN
Inventors: 任飞扬; 杨文�; 牟丽莎
Original assignee: Deep Blue Automotive Technology Co ltd
Current assignee: Deep Blue Automotive Technology Co ltd
Priority date: 2023-03-31
Filing date: 2023-03-31
Publication date: 2023-08-25
Anticipated expiration: 2033-03-31

Abstract

The utility model relates to a secondary battery pole structure and a battery pack, comprising a shell and a pole body fixed in the shell, wherein the shell is of a regular hexagonal prism structure, the top surface of the shell is provided with a mounting hole for mounting the pole body, the pole body is of a three-layer round table structure with diameters sequentially reduced from top to bottom, a protruding part positioned at the top end of the mounting hole, a middle part positioned between the top end and the bottom end of the mounting hole and a pressure-bearing part positioned at the bottom end of the mounting hole sequentially from top to bottom, and an insulating part for insulating the pole body from the shell is arranged between the pole body and the shell.

Description

Secondary battery post structure and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a secondary battery post structure and a battery pack.

Background

With the rapid development of new energy industries, the demands of secondary batteries are increasing in number, and higher demands are being put on the energy density, safety and the like of the secondary batteries. The shapes of secondary batteries in the current market are roughly divided into three types of square shells, cylinders and soft packages. Among them, cylindrical secondary batteries are favored by many users due to smaller size, higher energy density, lower cost, and standardization. For devices requiring more energy such as new energy automobiles, a large number of secondary batteries are often integrated into one battery pack. However, compared with Fang Ke secondary batteries, cylindrical secondary batteries have low space utilization rate due to the clearance between the circular surfaces when integrated into a battery pack, and the energy density of the battery pack is not excellent, and in recent years, a new secondary battery form, namely a hexagonal secondary battery, has been proposed in the industry, and the hexagonal secondary battery has higher integration efficiency than Fang Ke and cylindrical secondary batteries.

CN214123986U discloses a secondary battery top cap and secondary battery thereof, including the secondary battery top cap, including the top cap piece, the negative pole post, be fixed in the riveting piece of negative pole post, first mounting hole has been seted up to the top cap piece, the negative pole post wears to establish and insulating install in first mounting hole, the riveting piece is insulating with the top cap piece by first insulating part, the negative pole post is including wearing the body of establishing first mounting hole and being located top cap piece lower part and insulating boss portion with it, top cap piece and body are insulating by the sealing member, the middle part of body is equipped with the ascending recess of opening, deformation that takes place by external force extrusion is passed through to the perisporium of recess on the upper portion of body rivets with the riveting piece, and the lower part butt is in the sealing member in the horizontal direction. The sealing element can be horizontally pressed to realize sealing, so that the influence on the service performance of the secondary battery caused by the traditional pressing in the vertical direction is avoided, but the sealing element is not suitable for a hexagonal prism cell structure of a hexagonal secondary battery.

Needless to say, the technical solution disclosed in the above patent document is an advantageous attempt in the art.

Disclosure of Invention

An object of the present utility model is to provide a secondary battery post structure that can be applied to a hexagonal secondary battery; the second object is to provide a battery pack having the secondary battery post structure.

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

the utility model provides a secondary cell utmost point post structure, includes the casing and fixes utmost point post body in the casing, the appearance of casing is regular hexagonal prism structure, the top surface of casing is equipped with the mounting hole that is used for installing utmost point post body, utmost point post body is from last three-layer round platform structure that reduces in proper order the diameter down, from last to down be in proper order be the bulge that is located the mounting hole top, be located the middle part between mounting hole top and the bottom and be located the pressure-bearing portion of mounting hole bottom, utmost point post body with be equipped with between the casing and be used for making utmost point post body and the insulating piece of casing.

Further, the diameter of the pressure-bearing portion is larger than the diameter of the mounting hole. The pressure-bearing part is abutted with the bottom of the mounting hole, so that the stability of the battery pole and the shell is improved.

Further, the diameter of the protruding portion is smaller than the diameter of the mounting hole and protrudes out of the top surface of the housing through the mounting hole, and the protruding portion is riveted with a rivet block for fixing the pole body. Through the fixation of the riveting block, the connection between the pole body and the shell is more stable and reliable, and the service life of the battery is prolonged.

Further, the insulating piece comprises an upper insulating gasket positioned between the riveting block and the top surface of the shell, a lower insulating gasket positioned between the pressure bearing part and the bottom surface of the shell, and a sealing ring positioned between the middle part and the protruding part. The sealing of the gap between the pole body and the shell is realized, the electric leakage and the short circuit are prevented, and the safety of the battery is improved.

Further, the shape of the lower insulating spacer is a regular hexagon adapting to the shape of the shell, a through hole is formed in the lower insulating spacer, and the diameter of the through hole is larger than that of the mounting hole so as to pass through the middle portion and the protruding portion. So that the intermediate portion and the protruding portion can be better combined with the insulating spacer between the cases.

Further, the sealing ring realizes the sealing of the middle part and the mounting hole through the pressing force of the riveting block. The insulation and sealing properties of the inside of the battery are ensured.

Further, the seal ring includes an inner ring for filling a gap between the intermediate portion and the mounting hole, and a main body portion abutting between the top surface of the housing and the pressure-receiving portion. Thereby improving the insulation effect of the middle part and the protruding part from the housing.

Further, the upper insulating gasket, the lower insulating gasket and the sealing ring are all made of insulating materials. The upper insulating gasket and the lower insulating gasket can be pp or pa, and the sealing ring can be fluororubber, so that good insulating effect is ensured.

Further, the shell is integrally drawn and sealed with the top surface or the bottom surface, or both the top surface and the bottom surface are sealed with each other by welding.

A battery pack comprises the secondary battery post structure.

The utility model has the beneficial effects that:

1. because the appearance of casing is regular hexagonal prism structure, can closely laminate in each casing side when the integration is in the battery package, space utilization is high, can improve the energy density of battery package, also can improve the capacity of the utmost point core in the hexagonal prism electric core structure in the casing, can hold more electrolyte in the battery, can make the life-span of utmost point core longer to the life-span of extension battery promotes the performance of battery.

2. Because the structural design of utmost point post body and insulating part can be applicable to the casing of regular hexagon post structure, utmost point post body three-layer round platform structure and riveting piece can be to making the connection between utmost point post and the casing inseparabler and can ensure good insulating effect, and regular hexagon's lower insulating gasket can effectively realize the insulation between change piece and the casing, avoids inside and the casing to take place short circuit scheduling problem of battery.

Drawings

FIG. 1 is a schematic structural view of a housing;

FIG. 2 is a schematic illustration of a pole section installed;

FIG. 3 is a schematic structural view of a column portion;

FIG. 4 is a schematic structural view of a seal ring;

fig. 5 is a schematic view of the structure of the lower insulating spacer.

Technical features and marks in the drawings:

a shell 1, a mounting hole 11,

A pole body 2, a pressure-bearing part 21, an intermediate part 22, a protruding part 23,

A riveting block 3,

A sealing ring 4, a main body 41, an inner ring 42,

An upper insulating spacer 5,

Lower insulating spacer 6, through hole 61.

Detailed Description

Embodiments of the present utility model will be described below with reference to the drawings and preferred embodiments, and those skilled in the art will appreciate further advantages and effects of the present utility model from the disclosure herein. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be understood that the preferred embodiments are presented by way of illustration only and not by way of limitation.

It should be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present utility model by way of illustration, and only the components related to the present utility model are shown in the illustrations, not according to the number, shape and size of the components in actual implementation, and the form, number and proportion of each component in actual implementation may be arbitrarily changed, and the layout of the components may be more complex.

As shown in fig. 1 and 2, a secondary battery post structure comprises a housing 1 and a post body 2 fixed in the housing 1, wherein the housing 1 is in a regular hexagonal prism structure, a mounting hole 11 for mounting the post body 2 is formed in the top surface of the housing 1, the post body 2 is in a three-layer round table structure with sequentially reduced diameters from top to bottom, a protruding portion 23 positioned at the top end of the mounting hole 11, a middle portion 22 positioned between the top end and the bottom end of the mounting hole 11 and a bearing portion 21 positioned at the bottom end of the mounting hole 11 are sequentially formed from top to bottom, and an insulating member for insulating the post body 2 from the housing 1 is arranged between the post body 2 and the housing 1. The shell 1 is integrally drawn and formed and sealed on the top surface or the bottom surface, or the top surface and the bottom surface are both sealed by welding. The shell 1 is of a regular hexagonal column structure, when the shell is integrated in a battery pack, the side faces of the shell 1 can be tightly attached, the space utilization rate is high, the energy density of the battery pack can be improved, the capacity of a pole core in a hexagonal prism cell structure in the shell 1 can be improved, more electrolyte can be contained in a battery, the service life of the pole core can be prolonged, the service life of the battery can be prolonged, and the performance of the battery can be improved.

As shown in fig. 2 and 3, the diameter of the pressure receiving portion 21 is larger than the diameter of the mounting hole 11. The pressure-bearing portion 21 can completely cover the mounting hole 11, the stability of the battery pole and the shell 1 is improved through the abutting connection of the pressure-bearing portion 21 and the bottom of the mounting hole 11, and the pressure-bearing portion 21 is provided with a switching sheet which is in contact with the hexagonal prism cell in the shell 1. The diameter of the protruding part 23 is smaller than the diameter of the mounting hole 11 and protrudes out of the top surface of the housing 1 through the mounting hole 11, and the protruding part thereof rivets the rivet block 3 for fixing the pole body 2. Through the fixation of the riveting block 3, the connection between the pole body 2 and the shell 1 is more stable and reliable, and the service life of the battery is prolonged.

As shown in fig. 2, the insulating member includes an upper insulating spacer 5 between the rivet block 3 and the top surface of the housing 1, a lower insulating spacer 6 between the pressure bearing portion 21 and the bottom surface of the housing 1, and a sealing ring 4 between the intermediate portion 22 and the protruding portion 23. The gap between the pole body 2 and the shell 1 is closed, leakage and short circuit are prevented, and the safety of the battery is improved. The upper insulating gasket 5, the lower insulating gasket 6 and the sealing ring 4 are all made of insulating materials. The upper insulating gasket 5 and the lower insulating gasket 6 can be pp or pa, and the sealing ring 4 can be fluororubber, so as to ensure good insulating effect.

As shown in fig. 4, the sealing ring 4 seals the intermediate portion 22 and the mounting hole 11 by the pressing force of the rivet block 3. The seal ring 4 includes an inner ring 42 for filling the gap between the intermediate portion 22 and the mounting hole 11 and a main body portion 41 abutting between the top surface of the housing 1 and the pressure receiving portion 21, thereby improving the insulating effect of the intermediate portion 22 and the projecting portion 23 with the housing 1.

As shown in fig. 5, the shape of the lower insulating spacer 6 is a regular hexagon adapted to the shape of the housing 1, the lower insulating spacer 6 is provided with a through hole, the diameter of the through hole is larger than that of the mounting hole 11, so that the middle portion 22 and the protruding portion 23 can be better combined with the insulating spacer between the housing 1 through the middle portion 22 and the protruding portion 23, and the three-layer truncated cone structure of the pole body 2 and the lower insulating spacer 6 of the regular hexagon can ensure a better insulating effect to ensure the connection between the pole and the housing 1, thereby avoiding the short circuit between the inside of the battery and the housing.

The embodiment also provides a battery pack, which comprises the secondary battery post structure.

The above embodiments are merely preferred embodiments for fully explaining the present utility model, and the scope of the present utility model is not limited thereto. Equivalent substitutions and modifications will occur to those skilled in the art based on the present utility model, and are intended to be within the scope of the present utility model.

Claims

1. A secondary battery post structure comprising a housing (1) and a post body (2) fixed in the housing (1), characterized in that: the appearance of casing (1) is regular hexagonal prism structure, the top surface of casing (1) is equipped with mounting hole (11) that are used for installing utmost point post body (2), utmost point post body (2) are from last three-layer round platform structure that reduces in proper order to lower diameter, are bulge (23) that are located mounting hole (11) top, intermediate part (22) that are located between mounting hole (11) top and the bottom and pressure-bearing portion (21) that are located mounting hole (11) bottom from last to lower in proper order, utmost point post body (2) with be equipped with between casing (1) and be used for making utmost point post body (2) and casing (1) insulating piece.

2. The secondary battery post structure according to claim 1, wherein the diameter of the pressure-receiving portion (21) is larger than the diameter of the mounting hole (11).

3. The secondary battery post structure according to claim 1 or 2, wherein the diameter of the protruding portion (23) is smaller than the diameter of the mounting hole (11) and protrudes through the mounting hole (11) to the top surface of the case (1), and the protruding portion thereof is riveted with the rivet block (3) for fixing the post body (2).

4. A secondary battery post structure according to claim 3, characterized in that the insulating member comprises an upper insulating spacer (5) between the rivet block (3) and the top surface of the case (1), a lower insulating spacer (6) between the pressure bearing portion (21) and the bottom surface of the case (1), and a sealing ring (4) between the intermediate portion (22) and the protruding portion (23).

5. The secondary battery post structure according to claim 4, wherein the shape of the lower insulating spacer (6) is a regular hexagon that fits the shape of the case (1), and a through hole having a diameter larger than that of the mounting hole (11) is provided on the lower insulating spacer (6) for passing through the intermediate portion (22) and the protruding portion (23).

6. The secondary battery post structure according to claim 4, wherein the seal ring (4) achieves sealing of the intermediate portion (22) with the mounting hole (11) by a pressing force of the caulking block (3).

7. The secondary battery post structure according to claim 6, wherein the seal ring (4) includes an inner ring (42) for filling a gap between the intermediate portion (22) and the mounting hole (11), and a main body portion (41) abutting between the top surface of the case (1) and the pressure receiving portion (21).

8. The secondary battery post structure according to claim 4, wherein the upper insulating gasket (5), the lower insulating gasket (6) and the sealing ring (4) are all made of insulating materials.

9. The secondary battery post structure according to claim 1, wherein the case (1) is integrally drawn and formed with a top surface or a bottom surface thereof welded and sealed, or with both the top surface and the bottom surface welded and sealed.

10. A battery pack comprising the secondary battery post structure according to any one of claims 1 to 9.