CN219067126U

CN219067126U - Battery cell

Info

Publication number: CN219067126U
Application number: CN202223447826.1U
Authority: CN
Inventors: 李龙; 徐同力; 徐檑
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-21
Filing date: 2022-12-21
Publication date: 2023-05-23
Anticipated expiration: 2032-12-21

Abstract

The utility model discloses a battery monomer, which comprises: a housing configured in a rectangular parallelepiped shape and having a pair of first walls, a pair of second walls, and a pair of third walls, each of the first walls and the second walls having a surface area smaller than a surface area of the third wall; an explosion-proof valve disposed on the first wall; the pole group is arranged in the shell, the pole group comprises a pole group body and a pole group protrusion, the pole group protrusion is arranged on the side face, facing the first wall, of the pole group body, the pole group protrusion is used for spacing the pole group body from the first wall to form a first channel, a second channel is formed between the pole group body and the second wall, the second channel is communicated with the first channel, and the first channel corresponds to the explosion-proof valve. According to the utility model, the first channel is formed by the protrusion of the electrode group, so that gas generated when the battery monomer is abnormal is conveniently discharged out of the battery monomer through the explosion-proof valve, and the safety is improved.

Description

Battery cell

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery monomer.

Background

With the continuous development of technology, the requirements of users on new energy batteries are getting higher. In order to improve the safety performance of the battery cell, an explosion-proof valve is usually arranged on the battery. When the battery runs abnormally and gas is generated in the battery, the gas can be discharged through the explosion-proof valve, so that a large safety accident is avoided.

However, the electrode group in the battery is attached to the shell, and generated gas cannot reach the explosion-proof valve, so that the explosion-proof valve cannot be timely exploded, and potential safety hazards exist.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a battery cell, and the safety is improved.

According to an embodiment of the present utility model, a battery cell includes: a housing configured in a rectangular parallelepiped shape and having a pair of first walls, a pair of second walls, and a pair of third walls, each of the first walls and the second walls having a surface area smaller than a surface area of the third walls; an explosion valve disposed at the first wall; the pole group is arranged in the shell, the pole group comprises a pole group body and a pole group protrusion, the pole group protrusion is arranged on the side face, facing the first wall, of the pole group body, the pole group protrusion is used for spacing between the pole group body and the first wall to form a first channel, a second channel is formed between the pole group body and the second wall, the second channel is communicated with the first channel, and the first channel corresponds to the explosion-proof valve.

According to the battery cell provided by the embodiment of the utility model, the first channel is formed by arranging the electrode group protrusions, so that gas generated when the battery cell is abnormal is conveniently discharged out of the battery cell through the explosion-proof valve, and the safety is improved.

In some embodiments, the pole set protrusions are a plurality and are spaced apart along the length of the first wall.

In some embodiments, the explosion proof valve is located between two adjacent pole set projections.

In some embodiments, the width of the pole set protrusion is less than the width of the first wall; or the electrode group bulge is provided with a gas channel.

In some embodiments, the pole group protrusions are configured as a protrusion structure with a high middle and low two ends, and the explosion-proof valves are respectively positioned at two sides of the highest middle of the protrusion structure.

In some embodiments, the cross-sectional area of the first channel is graded, and an end of the first channel having a larger cross-sectional area communicates with the second channel.

In some embodiments, the height of the pole group is H1, and the height of the pole group protrusions is H1, and H1 satisfy the relationship: h1 is more than or equal to 1 percent and h1 is more than or equal to 5 percent H1.

In some embodiments, the pole set further comprises: an end plate disposed between the pole set body and the second wall, the end plate and the second wall forming the second channel therebetween.

In some embodiments, one end of the second channel extends to and communicates with the first channel, and the other end of the second channel extends to another of the first walls opposite the first channel.

In some embodiments, the end plate comprises: the end plate body and set up the orientation of end plate body the backup pad of second wall, the backup pad has the backup pad recess, the second passageway by the backup pad separates and forms multistage but two adjacent sections by backup pad recess intercommunication, be provided with the second ventilation hole on the end plate body.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic view of a part of a battery cell according to an embodiment of the present utility model;

FIG. 2 is a schematic view showing the structure of a pole group protrusion according to a first embodiment of the present utility model;

FIG. 3 is a schematic view showing the structure of a pole group protrusion according to a second embodiment of the present utility model;

fig. 4 is a partial enlarged view of I in fig. 1.

Reference numerals:

100. a battery cell;

10. a housing; 11. a first wall; 111. a first channel; 12. a second wall; 121. a second channel; 13. a third wall; 14. a main body; 15. a cover plate;

20. an explosion-proof valve; 30. a pole group; 31. a pole group body; 33. an end plate; 331. an end plate body; 3311. a second vent hole; 332. a support plate; 3321. a support plate groove; 34. the polar group is convex.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly, for distinguishing between the descriptive features, and not sequentially, and not lightly.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between 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.

The battery cell according to the embodiment of the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1, 2 and 3, according to a battery cell 100 of an embodiment of the present utility model, the battery cell 100 includes: a housing 10, an explosion proof valve 20 and a pole group 30.

The housing 10 is configured in a rectangular parallelepiped shape and has a pair of first walls 11, a pair of second walls 12, and a pair of third walls 13, each of the first walls 11 and the second walls 12 having a surface area smaller than that of the third walls 13. An explosion-proof valve 20 is provided at the first wall 11.

The pole group 30 is disposed in the housing 10, the pole group 30 includes a pole group body 31 and a pole group protrusion 34, the pole group protrusion 34 is disposed on a side of the pole group body 31 facing the first wall 11, the pole group protrusion 34 spaces the pole group body 31 from the first wall 11 to form a first passage 111, a second passage 121 is formed between the pole group body 31 and the second wall 12, the second passage 121 communicates with the first passage 111, and the first passage 111 corresponds to the explosion proof valve 20.

The pole group protrusion 34 separates the pole group body 31 from the first wall 11, the space between the pole group body 31 and the first wall 11 is a first channel 111, the first channel 111 corresponds to the explosion-proof valve 20, when the battery cell 100 is abnormal, the gas generated in the battery cell 100 flows through the first channel 111 easily and is discharged out of the battery cell 100 through the explosion-proof valve 20, so that the explosion of the battery cell 100 is avoided, and the safety is improved.

The pole group body 31 faces the first wall 11, and the first wall 11 has a smaller surface area than the third wall 13, thereby improving the overall strength.

According to the battery cell 100 of the embodiment of the utility model, the first channel 111 is formed by arranging the electrode group protrusions 34, so that gas generated when the battery cell 100 is abnormal is conveniently discharged out of the battery cell 100 through the explosion-proof valve 20, and the safety is improved.

As shown in fig. 2, in some embodiments, the pole set protrusions 34 are a plurality and are spaced apart along the length of the first wall 11. By providing a plurality of pole group protrusions 34 to support the case 10, the overall strength of the battery cell 100 is improved, and deformation is prevented.

In some embodiments, the explosion proof valve 20 is located between two adjacent pole set protrusions 34. It should be noted that the explosion-proof valve 20 is located between two adjacent electrode group protrusions 34, so as to avoid the electrode group protrusions 34 from blocking the explosion-proof valve 20, and improve stability.

In some embodiments, the width of the pole set protrusion 34 is less than the width of the first wall 11. By providing the width of the pole group protrusion 34 to be smaller than the width of the first wall 11, gas can flow through both sides of the pole group protrusion 34, maintaining the patency of the first passage 111.

In some embodiments, the pole set protrusions 34 are provided with gas passages. The first passage 111 is unobstructed by providing a gas passage.

As shown in fig. 3, in some embodiments, the pole group protrusion 34 is constructed in a protrusion structure having a high middle and low ends, and the explosion-proof valve 20 is positioned at both sides of the highest middle of the protrusion structure, respectively. It will be appreciated that the raised structure with the middle high and the two low ends supports the housing 10, with the upper middle portion abutting the first wall 11 to form the first channel 111, and the two low ends allow the pole set protrusions 34 to not block the explosion proof valve 20, improving stability.

In some embodiments, the cross-sectional area of the first channel 111 is graded, and the end of the first channel 111 having the larger cross-sectional area communicates with the second channel 121. It will be appreciated that the end of the first passage 111 having the enlarged cross-sectional area communicates with the second passage so that the gas in the second passage 121 more easily enters the first passage 111.

As shown in fig. 2 and 3, in some embodiments, the height of the pole group 30 is H1, the height of the pole group protrusion 34 is H1, and H1 satisfy the relationship: h1 is more than or equal to 1 percent and h1 is more than or equal to 5 percent H1. It should be noted that, if h1<1% h1, the height of the electrode set protrusion 34 is smaller, the space of the first channel 111 is insufficient to smoothly exhaust the gas, and if h1>5% h1, the height of the electrode set protrusion 34 is larger, the electrode set protrusion 34 occupies a larger space, resulting in a smaller volume of the electrode set body 31 and reduced energy that can be contained in the battery cell 100. The present application increases the receivable energy of the battery cell 100 by setting h1 in the range of 1% h1 to 5% h1 on the basis of ensuring smooth gas flow.

For example, h1 is 1% h1; alternatively, h1 is 2% h1; alternatively, h1 is 3% h1; alternatively, h1 is 4% h1; alternatively, h1 is 5% h1.

As shown in fig. 1, in some embodiments, the pole group 30 further comprises: an end plate 33, the end plate 33 being disposed between the pole group body 31 and the second wall 12, the end plate 33 and the second wall 12 forming a second passage 121 therebetween. By providing the end plate 33, modification of the solution is facilitated.

As shown in fig. 1, in some embodiments, one end of the second channel 121 extends to the first channel 111 and communicates with the first channel 111, and the other end of the second channel 121 extends to another first wall 11 opposite the first channel 111. By providing the second channel 121 with one end communicating with the first channel 111 and the other end extending to the other first wall 11, the effective coverage of the second channel 121 is increased as much as possible.

As shown in fig. 1, 4, in some embodiments, the end plate 33 includes: the end plate body 331 and set up the backup pad 332 towards second wall 12 in end plate body 331, backup pad 332 has backup pad recess 3321, and second passageway 121 is divided by backup pad 332 and forms multistage but two adjacent sections are by backup pad recess 3321 intercommunication, is provided with second ventilation hole 3311 on the end plate body 331. The support plate 332 is located between the second plate body and the second wall 12, so that the second plate body and the inner wall surface of the second wall 12 define the second channel 121, which is simple, wherein the support plate 332 is provided with the support plate groove 3321 to increase the smoothness of the second channel 121.

The second plate body is provided with a second vent hole 3311, and the second vent hole 3311 facilitates the gas generated by the abnormal condition of the battery cell 100 to enter the second channel 121.

In some embodiments, the surface area of the second wall 12 is less than the surface area of the first wall 11.

As shown in fig. 1, in some embodiments, the housing 10 includes: the main body 14 and the cover plate 15, the cover plate 15 is arranged on the second wall 12, and the cover plate 15 is welded on the main body 14.

Other constructions and operations of the battery cell 100 according to the embodiment of the present utility model are known to those of ordinary skill in the art, and will not be described in detail herein.

In the description herein, reference to the term "embodiment," "example," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery cell (100), characterized by comprising:

a housing (10), the housing (10) being configured as a rectangular parallelepiped and having a pair of first walls (11), a pair of second walls (12) and a pair of third walls (13), a surface area of each of the first walls (11) and the second walls (12) being smaller than a surface area of the third walls (13);

-an explosion protection valve (20), said explosion protection valve (20) being arranged at said first wall (11);

the pole group (30), pole group (30) set up in casing (10), pole group (30) include pole group body (31) and pole group arch (34), pole group arch (34) set up pole group body (31) orientation first wall (11) side, pole group arch (34) will pole group body (31) with first wall (11) between spaced apart in order to be formed with first passageway (111), pole group body (31) with be formed with second passageway (121) between second wall (12), second passageway (121) with first passageway (111) intercommunication, and first passageway (111) with explosion-proof valve (20) correspond.

2. The battery cell (100) of claim 1, wherein the pole set protrusions (34) are plural and spaced apart along the length of the first wall (11).

3. The battery cell (100) of claim 2, wherein the explosion-proof valve (20) is located between two adjacent pole group projections (34).

4. The battery cell (100) of claim 2, wherein the width of the pole group protrusion (34) is smaller than the width of the first wall (11); or the electrode group protrusion (34) is provided with a gas channel.

5. The battery cell (100) according to claim 1, wherein the pole group protrusion (34) is constructed in a protrusion structure having a high middle and low ends, and the explosion-proof valve (20) is respectively located at both sides of the highest middle of the protrusion structure.

6. The battery cell (100) of claim 1, wherein the cross-sectional area of the first channel (111) is graded and an end of the first channel (111) having a larger cross-sectional area communicates with the second channel (121).

7. The battery cell (100) of claim 1, wherein the height of the pole group (30) is H1, the height of the pole group protrusion (34) is H1, and H1 satisfy the relationship: h1 is more than or equal to 1 percent and h1 is more than or equal to 5 percent H1.

8. The battery cell (100) of claim 1, wherein the pole group (30) further comprises: -an end plate (33), said end plate (33) being arranged between said pole group body (31) and said second wall (12), said end plate (33) and said second wall (12) forming said second channel (121) therebetween.

9. The battery cell (100) of claim 8, wherein one end of the second channel (121) extends to the first channel (111) and communicates with the first channel (111), and the other end of the second channel (121) extends to another first wall (11) opposite to the first channel (111).

10. The battery cell (100) of claim 9, wherein the end plate (33) comprises: the end plate body (331) and set up end plate body (331) orientation second wall (12) backup pad (332), backup pad (332) have backup pad recess (3321), second passageway (121) by backup pad (332) separate form multistage but two adjacent sections by backup pad recess (3321) intercommunication, be provided with second ventilation hole (3311) on end plate body (331).