CN218472098U

CN218472098U - Battery case, single battery and battery module

Info

Publication number: CN218472098U
Application number: CN202222755325.3U
Authority: CN
Inventors: 孔令明; 刘子文
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-02-10
Anticipated expiration: 2032-10-18

Abstract

The utility model belongs to the technical field of the battery, a battery case, battery cell and battery module are disclosed. The battery case includes a first end cap, a tubular case, and a second end cap. Specifically, the first end cover and the second end cover are respectively arranged at two ends of the tubular shell in the axial direction, and the sections, parallel to the radial direction of the tubular shell, of the first end cover and the second end cover are larger than the section of the tubular shell. After the battery cases are arranged in parallel in the radial direction of the tubular cases, the first end covers at one ends of the battery cases are connected, the second end covers at the other ends of the battery cases are connected, and the sections of the first end covers and the second end covers of the battery cases are larger than that of the tubular cases, so that certain gaps exist between the tubular cases of the adjacent battery cases, when the battery cases are mutually extruded, the first end covers and the second end covers firstly bear extrusion force, and the tubular cases and the battery cores positioned in the tubular cases are prevented from being extruded due to the existence of the gaps, so that the safety of the battery is improved.

Description

Battery case, single battery and battery module

Technical Field

The utility model relates to a battery technology field especially relates to a battery case, battery cell and battery module.

Background

The appearance of the current common battery is cylindrical, and the battery is generally used in a group in an electric vehicle.

After the batteries of the cylindrical battery shell are stacked side by side, when the batteries are extruded by external force, the batteries are extruded mutually and can be directly applied to the internal winding core, so that the safety problem is easily caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery case, battery cell and battery module can reduce the extrusion to the inside electric core of battery case when battery cell extrudees each other side by side, improves battery cell's security.

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

the battery shell comprises a first end cover, a tubular shell and a second end cover, wherein the first end cover and the second end cover are respectively arranged at two ends of the tubular shell in the axial direction, and the sections, parallel to the radial direction of the tubular shell, of the first end cover and the second end cover are larger than the section of the tubular shell.

Optionally, the tubular shell comprises a first expanding section, a main body section and a second expanding section which are connected in sequence, the first end cover is connected with the first expanding section, the first expanding section expands in diameter from the main body section to the first end cover, the second end cover is connected with the second expanding section, and the second expanding section expands in diameter from the main body section to the second end cover.

Optionally, an end face, away from the tubular shell, of the first end cap is provided with a positive post, and an end face, away from the tubular shell, of the second end cap is provided with a negative post.

Optionally, the first end cap, the tubular shell and the second end cap are all circular in cross section parallel to the radial direction of the tubular shell.

Optionally, the first end cap and the second end cap are the same outer diameter.

Optionally, the battery case is symmetrical in the axial direction of the tubular case.

The single battery comprises a battery core and the battery shell, wherein the battery core is arranged in the battery shell.

Optionally, the cell is disposed within the tubular shell.

The battery module comprises the single batteries, and each single battery is arranged along the radial direction and connected with each other.

Optionally, an end surface of the first end cover of each of the unit batteries is flush, and an end surface of the second end cover of each of the unit batteries is flush.

Has the advantages that:

the utility model provides a battery case, battery cell and battery module, pile up the back side by side radially with battery cell, make the first end cover of battery cell one end meet, the second end cover of the battery cell other end meets, because the cross-section of the first end cover of battery case and second end cover all is greater than the cross-section of tubulose shell, therefore, all there is certain clearance between adjacent battery cell's the tubulose shell, when squeezing each other between battery cell, first end cover and second end cover at first bear the extrusion force, tubulose shell and be located the electric core of tubulose shell then because the existence in clearance, avoid the extrusion, thereby the security of battery cell and battery module has been improved. Meanwhile, a cooling channel between the adjacent single batteries is reserved due to the existence of the gap, so that the single batteries and the battery module are conveniently cooled, and the heat dissipation effect is improved.

Drawings

Fig. 1 is a front view of a battery case provided by an embodiment of the present invention;

fig. 2 is a side view of a battery case according to an embodiment of the present invention;

fig. 3 is another side view of a battery case according to an embodiment of the present invention;

fig. 4 is an isometric view of battery cases arranged side by side according to an embodiment of the present invention;

fig. 5 is a top view of battery cases arranged side by side according to an embodiment of the present invention;

fig. 6 is a side view of battery cases arranged side by side according to an embodiment of the present invention.

In the figure:

1. a first end cap; 11. a positive post;

2. a tubular shell; 21. a first diameter expanding section; 22. a main body section; 23. a second diameter expanding section;

3. a second end cap; 31. and a negative pole.

Detailed Description

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

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", "left", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

As shown in fig. 1 to 3, the present embodiment provides a battery case including a first end cap 1, a tubular case 2, and a second end cap 3.

Referring to fig. 1, specifically, a first end cap 1 and a second end cap 3 are respectively provided at both ends of a tubular shell 2 in an axial direction, and a cross section of each of the first end cap 1 and the second end cap 3 parallel to a radial direction of the tubular shell 2 is larger than a cross section of the tubular shell 2. The first end cap 1, the second end cap 3 and the tubular shell 2 may be made of aluminum, steel, plastic or carbon fiber, and the like, and are not particularly limited herein.

With continued reference to fig. 1, in the present embodiment, the tubular shell 2 comprises a first expanding section 21, a main section 22 and a second expanding section 23 which are connected in sequence, the first expanding section 21 is connected with the first expanding section 1, the first expanding section 21 expands in diameter from the main section 22 to the first end cover 1, the second end cover 3 is connected with the second expanding section 23, and the second expanding section 23 expands in diameter from the main section 22 to the second end cover 3. Specifically, the first end cap 1 is welded and capped on the first diameter-expanding section 21, and the second end cap 3 is welded and capped on the second diameter-expanding section 23.

Referring to fig. 4 to 6, in the present embodiment, after the battery cases are arranged in parallel in the radial direction of the tubular cases 2, the first end caps 1 at one ends of the battery cases are connected to each other, and the second end caps 3 at the other ends of the battery cases are connected to each other, because the cross sections of the first end caps 1 and the second end caps 3 of the battery cases are larger than the cross section of the tubular cases 2, a certain gap is formed between the tubular cases 2 of adjacent battery cases, when the battery cases are pressed against each other, the first end caps 1 and the second end caps 3 firstly bear the pressing force, and the tubular cases 2 and the battery cells located in the tubular cases 2 are prevented from being pressed due to the existence of the gap, so that the safety of the single batteries and the battery module is improved.

As shown in fig. 1 to 3, preferably, the first end cap 1, the tubular shell 2 and the second end cap 3 are all circular in cross section parallel to the radial direction of the tubular shell 2. When the axes of the first end cover 1, the tubular shell 2 and the second end cover 3 are all straight lines, the first end cover 1, the tubular shell 2 and the second end cover 3 form a battery shell with thick ends and thin middle, the battery shell is in an axisymmetric similar cylindrical structure, and the cylindrical battery has the characteristic of convenience in installation. Further, the first end cap 1 and the second end cap 3 have the same outer diameter. When the adjacent battery cases are arranged side by side, the distances between the tubular cases 2 are the same in the axial direction of the tubular cases 2.

In one embodiment, as shown in fig. 1, the end face of the first end cap 1 away from the tubular shell 2 is provided with a positive post 11, and the end face of the second end cap 3 away from the tubular shell 2 is provided with a negative post 31. Wherein, positive post 11 and first end cover 1 are integrated into one piece's structure, and negative pole post 31 and second end cover 3 are integrated into one piece's structure, and positive post 11 takes off with the difficult separation of first end cover 1, and negative pole post 31 takes off with the difficult separation of second end cover 3, and simultaneously, the total part number that makes the battery case contain is few, the assembly of the battery case of being convenient for. The integral molding manner is not limited, such as CNC machining, die forming or punch forming, and the like.

In another embodiment, the first end cap 1 and the second end cap 3 are both connected to the tubular casing 2 in an insulating manner, for example, the tubular casing 2 is a plastic casing, the first end cap 1 and the second end cap 3 are metal casings, the first end cap 1 itself is a positive terminal of the battery, and the second end cap 3 itself is a negative terminal of the battery, without additionally providing the positive post 11 and the negative post 31.

Alternatively, the battery case is symmetrical along the length of the tubular case 2. In this embodiment, the first end cap 1 and the second end cap 3 have the same structure, are both cylindrical, and have beautiful and neat structures. The first end cover 1 and the second end cover 3 can be replaced mutually, and the cost is reduced.

The embodiment also provides a single battery, which comprises a battery core and the battery shell, wherein the battery core is arranged in the battery shell. When the single batteries are mutually extruded, because gaps between the tubular shells 2 exist, the parts of the battery core, which are positioned in the tubular shells 2, cannot be mutually extruded, and the extrusion range of the battery core when the battery shells are mutually extruded is reduced. Further, the battery core is disposed within the tubular casing 2. The extrusion between the first end caps 1 or the extrusion between the second end caps 3 has no extrusion effect on the battery core, and the safety of the single battery is further improved. The structure of the battery cell of the single battery provided in this embodiment may be a winding battery cell, and may also be a laminated battery cell, where no specific limitation is made here.

The embodiment also provides a battery module, which comprises the single batteries, wherein each single battery is arranged along the radial direction and is connected with the other single battery. A gap is reserved between each single battery in the battery module, so that the safety of the single batteries and the battery module can be improved, and the heat dissipation of the single batteries and the battery module can be improved. In this embodiment, the equal parallel and level of terminal surface of first end cover 1 of each battery cell, the equal parallel and level of terminal surface of the second end cover 3 of each battery cell for each battery cell neatly arranged in the battery module, the structure is pleasing to the eye.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements, and substitutions will now occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The battery shell is characterized by comprising a first end cover (1), a tubular shell (2) and a second end cover (3), wherein the first end cover (1) and the second end cover (3) are respectively arranged at two ends of the tubular shell (2) in the axial direction, and the radial sections, parallel to the tubular shell (2), of the first end cover (1) and the second end cover (3) are larger than the section of the tubular shell (2).

2. The battery casing according to claim 1, wherein the tubular casing (2) comprises a first diameter-expanding section (21), a main body section (22), and a second diameter-expanding section (23) connected in this order, the first diameter-expanding section (1) being connected to the first diameter-expanding section (21), the first diameter-expanding section (21) being gradually expanded in diameter from the main body section (22) toward the first end cover (1), the second end cover (3) being connected to the second diameter-expanding section (23), and the second diameter-expanding section (23) being gradually expanded in diameter from the main body section (22) toward the second end cover (3).

3. The battery can according to claim 1 or 2, wherein the end face of the first end cap (1) remote from the tubular can (2) is provided with a positive post (11), and the end face of the second end cap (3) remote from the tubular can (2) is provided with a negative post (31).

4. The battery can according to claim 1 or 2, wherein the cross-sections of the first end cap (1), the tubular case (2) and the second end cap (3) parallel to the radial direction of the tubular case (2) are all circular.

5. The battery can according to claim 4, wherein the first end cap (1) and the second end cap (3) have the same outer diameter.

6. The battery can according to claim 1 or 2, characterized in that the battery can is symmetrical in the axial direction of the tubular can (2).

7. A battery cell, comprising a cell and the battery housing of any one of claims 1-6, wherein the cell is disposed within the battery housing.

8. The cell according to claim 7, characterised in that the core is arranged within the tubular casing (2).

9. A battery module comprising the unit cells according to any one of claims 7 to 8, wherein the unit cells are arranged in a radial direction and connected to each other.

10. The battery module according to claim 9, wherein the end face of the first end cap (1) of each single battery is flush, and the end face of the second end cap (3) of each single battery is flush.