CN219371268U

CN219371268U - Battery, battery module and power device

Info

Publication number: CN219371268U
Application number: CN202320288668.5U
Authority: CN
Inventors: 李龙
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-07-18
Anticipated expiration: 2033-02-20

Abstract

The utility model provides a battery, a battery module and a power device, and relates to the technical field of batteries. The battery comprises a shell, a pole group, an explosion-proof valve and an exhaust structure. The pole group is arranged in the shell; the explosion-proof valve is arranged on the side wall of the shell; the exhaust structure is arranged between the inner wall of the shell and the outer wall of the pole group, so that an exhaust channel is formed between the shell and the pole group; the exhaust passage extends to the explosion-proof valve. The utility model can solve the problems of the prior art that the explosion-proof valve cannot be timely opened for pressure relief and poor safety due to the fact that the gas generated in the shell cannot smoothly reach the explosion-proof valve, and has the effects that the gas in the battery smoothly and rapidly flows to the explosion-proof valve along the exhaust channel, the explosion-proof valve can be timely opened for pressure relief in the battery, and the safety performance of the battery is improved.

Description

Battery, battery module and power device

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery, a battery module and a power device.

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, a pressure release mechanism is usually arranged on the battery cell. When the battery unit is abnormal in operation and generates gas, the gas can be discharged through the pressure release mechanism, so that a large safety accident is avoided.

The battery includes electric core and cladding in the outside casing of electric core, and relief mechanism adopts explosion-proof valve generally, and explosion-proof valve sets up on the casing, because the inside utmost point group of casing is laminated with the casing, leads to the unable explosion-proof valve department of arriving of gas that the battery produced, causes explosion-proof valve unable in time to explode, exists the potential safety hazard.

Disclosure of Invention

The utility model aims to overcome the defects that in the prior art, the explosion-proof valve cannot be timely opened for pressure relief and the safety is poor due to the fact that gas generated in a shell of a battery cannot smoothly reach the explosion-proof valve, so that the battery, the battery module and the power device are provided.

In order to solve the above problems, a first aspect of the present utility model provides a battery including a case, a pole group, an explosion-proof valve, and a vent structure. The pole group is arranged in the shell; the explosion-proof valve is arranged on the side wall of the shell; the exhaust structure is arranged between the inner wall of the shell and the outer wall of the pole group, so that an exhaust channel is formed between the shell and the pole group; the exhaust passage extends to the explosion-proof valve.

Optionally, the casing includes the casing body, and exhaust structure is including locating the convex part on the inner wall of casing body, the outer wall butt of the inner wall and the utmost point group of convex part, and the clearance between the outer wall of the inner wall of casing body and utmost point group forms the exhaust passage.

Optionally, the protruding portion includes a protrusion integrally punched from the housing body toward a side close to the pole group, or the protruding portion includes a bump fixedly disposed on the housing body.

Optionally, the extension length of the convex part along the thickness direction of the shell is s, the thickness of the shell is e, and s is 0.05-0.6 times of e.

Optionally, the height of the convex part protruding from the shell body is 0.3-5.5 mm.

Optionally, the explosion-proof valve is provided with one or more, and a plurality of exhaust structures are arranged at intervals on the periphery of each explosion-proof valve.

Optionally, the shortest distance between the exhaust structure and the explosion-proof valve is 10-200 mm.

Alternatively, the cross section of the convex portion along the convex direction is rectangular or circular.

A second aspect of the present utility model provides a battery module comprising a battery according to any one of the above technical solutions.

A third aspect of the present utility model provides a power device, including a battery as set forth in any one of the above technical solutions or a battery module as set forth in the above technical solutions.

The utility model has the following advantages:

1. by adopting the technical scheme, the exhaust structure is arranged between the inner wall of the shell and the outer wall of the pole group, and the exhaust structure enables an exhaust channel to be formed between the shell and the pole group, so that when gas is generated in the battery, the gas can smoothly and rapidly flow to the explosion-proof valve along the exhaust channel, the explosion-proof valve can be opened in time, the pressure relief in the battery is realized, and the safety performance of the battery is improved.

2. The exhaust structure is a convex part arranged on the shell body, and the inner wall of the convex part is contacted with the outer wall of the pole group, so that an exhaust channel is formed between the inner wall of the shell body and the outer wall of the pole group, and the structure is simple and easy to manufacture.

3. The extension length of the convex part along the thickness direction of the shell is 0.05-0.6 times of the thickness of the shell, so that on one hand, the abutting between the shell and the pole group can be ensured, the stable limiting effect on the pole group is realized, the pole group is prevented from shaking in the shell, on the other hand, the width of an exhaust channel can be ensured, the gas can smoothly and rapidly flow to the explosion-proof valve, and the timely exhaust and pressure relief can be realized; and, because the extension length of protruding portion is less than the thickness of casing to, exhaust passage intercommunication around the protruding portion makes the gas in the battery case all can flow to explosion-proof valve department.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is an exploded view showing a partial structure of a battery provided by an embodiment of the present utility model;

fig. 2 shows a battery according to an embodiment of the utility model a structural schematic diagram of the assembled shell and explosion-proof valve;

FIG. 3 shows an exploded view of the housing and explosion proof valve of FIG. 2;

fig. 4 is a schematic structural view showing a case in a battery according to an embodiment of the present utility model;

FIG. 5 shows a side view of FIG. 4;

FIG. 6 shows a partial cross-sectional view along A-A in FIG. 5;

FIG. 7 shows a cross-sectional view along B-B in FIG. 5;

FIG. 8 shows a side view of the housing assembled with the pole;

FIG. 9 shows a partial cross-sectional view along C-C in FIG. 8;

fig. 10 shows a schematic diagram of an arrangement of an explosion proof valve and an exhaust structure.

Reference numerals illustrate:

1. a housing; 10. a housing body; 11. a first side; 2. a pole group; 3. an explosion-proof valve; 31. an explosion-proof valve mounting groove; 32. an explosion-proof valve patch; 4. an exhaust structure; 41. a convex portion; 5. an exhaust passage; 6. a cover plate; 7. an end cap.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

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 can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

For the purpose of illustrating the concepts of the utility model, the drawings and detailed description are to be regarded as illustrative in nature and not as restrictive.

Example 1

A battery, referring to fig. 1-10, includes a housing 1, a pole group 2, an explosion-proof valve 3, and an exhaust structure 4. The pole group 2 is arranged in the shell 1; the explosion-proof valve 3 is arranged on the side wall of the shell 1; the exhaust structure 4 is arranged between the inner wall of the shell 1 and the outer wall of the pole group 2, so that an exhaust channel 5 is formed between the shell 1 and the pole group 2; the exhaust passage 5 extends to the explosion-proof valve 3.

By adopting the technical scheme of the utility model, the exhaust structure 4 is arranged between the inner wall of the shell 1 and the outer wall of the pole group 2, and the exhaust structure 4 enables the shell 1 and the pole group 2 to form the exhaust channel 5, so that when gas is generated in the battery, the gas can smoothly and rapidly flow to the explosion-proof valve 3 along the exhaust channel 5, the explosion-proof valve 3 can be opened in time, the pressure relief in the battery is realized, and the safety performance of the battery is improved.

Alternatively, referring to fig. 6, 8 and 9, the case 1 includes a case body 10, the exhaust structure 4 includes a convex portion 41 provided on an inner wall of the case body 10, the inner wall of the convex portion 41 abuts against an outer wall of the pole group 2, and a gap between the inner wall of the case body 10 and the outer wall of the pole group 2 forms the exhaust passage 5. Specifically, the height of the exhaust passage 5 is h, i.e., the distance between the lower surface of the convex portion 41 and the lower surface of the housing body 10 in fig. 9. Alternatively, the height of the protrusion 41 protruding from the housing body 10 is 0.3 to 5.5mm.

Alternatively, the convex portion 41 is formed by the case body 10 protruding toward the side close to the pole group 2. Specifically, the convex portion 41 may be formed by integral press molding from the housing body 10. Of course, in some other embodiments, the protrusion 41 is formed by a bump provided on the inner wall of the housing 1, and the bump may be fixedly connected to the housing body 10 by welding. The exhaust structure 4 is a convex part 41 arranged on the shell body 10, and the bottom wall of the convex part 41 is in contact with the outer wall of the pole group 2, so that an exhaust channel 5 is formed between the inner wall of the shell body 10 and the outer wall of the pole group 2, and the structure is simple and easy to manufacture.

Optionally, referring to fig. 7, the extension length of the protrusion 41 along the thickness direction of the casing 1 is s, the thickness of the casing 1 is e, and s is 0.05-0.6 times of e, so that, on one hand, the abutting between the casing 1 and the pole group 2 can be ensured, and a stable limit effect can be realized on the pole group 2, so that the pole group 2 cannot shake in the casing 1, and on the other hand, the width of the exhaust channel 5 can be ensured, so that the gas can smoothly and rapidly flow to the explosion-proof valve 3, and timely exhaust and pressure relief can be realized; also, since the extension length of the protruding portion 41 is smaller than the thickness of the case 1, the exhaust passages 5 around the protruding portion 41 communicate, so that the gas in the battery case 1 can flow to the explosion-proof valve 3. Specifically, referring to fig. 1, in this embodiment, the battery has a rectangular parallelepiped structure, and accordingly, the pole group 2 and the housing 1 have a rectangular parallelepiped structure. The shell 1 is covered outside the pole group 2. Referring to fig. 2 and 3, the explosion-proof valve 3 is provided on a first side 11 of the housing 1, which is formed of a long side and a high side. Since the housing 1 has a rectangular parallelepiped structure, the thickness of the housing 1 refers to the height of the housing 1.

Alternatively, referring to fig. 4 and 5, in the present embodiment, two explosion-proof valves 3 are provided and are both provided on the same first side 11 of the housing 1. Of course, the number of the explosion-proof valves 3 is not limited, and may be provided on other side surfaces of the housing 1. The exhaust structure 4 is provided in a peripheral region close to the explosion-proof valve 3. Optionally, a plurality of vent structures 4 are provided, and a plurality of vent structures 4 are spaced around the explosion-proof valve 3. In this embodiment, referring to fig. 4, two exhaust structures 4 are disposed around each explosion-proof valve 3, and the two exhaust structures 4 are symmetrically distributed on two sides of the explosion-proof valve 3.

Alternatively, the shortest distance between the exhaust structure 4 and the explosion-proof valve 3 is L, as shown in fig. 9, in the range of 10 to 200mm. Since the exhaust structures 4, that is, the protrusions 41 are provided on both sides of the explosion-proof valve 3, and the exhaust passages 5 between the two protrusions 41 are communicated, it is possible to guide the gas so that the gas flows to the lower side of the explosion-proof valve 3 along the exhaust passages 5. When a plurality of vent structures 4 are provided in the peripheral region of one explosion-proof valve 3, the plurality of vent structures 4 are uniformly distributed around the explosion-proof valve 3, as shown in fig. 10. Wherein the exhaust structure 4 is distributed along the long side of the explosion-proof valve 3, and the vertical distance between the exhaust structure and the long side of the explosion-proof valve 3 is L. And the exhaust structure 4 is distributed along the short side of the explosion-proof valve 3, and the vertical distance between the exhaust structure and the short side of the explosion-proof valve 3 is L.

Alternatively, referring to fig. 6, 7 or 9, the cross section of the convex portion 41 in the convex direction is rectangular. Of course, in some other embodiments, the cross-sectional shape of the protrusion 41 is other shapes, such as circular or semi-circular.

Specifically, referring to fig. 1, an end opening of the housing 1 is sequentially connected to the end cover 7 and the cover plate 6, so as to realize sealing.

Optionally, an explosion-proof valve mounting groove 31 is formed in the shell 1, and the explosion-proof valve 3 is correspondingly arranged in the explosion-proof valve mounting groove 31. Optionally, an explosion-proof valve patch 32 is disposed on the explosion-proof valve 3, for protecting the explosion-proof valve 3.

Example 2

A battery module comprising the battery described in embodiment 1.

Example 3

A power plant comprising the battery described in embodiment 1 or the battery module described in embodiment 2.

According to the above description, the present patent application has the following advantages:

1. the exhaust structure 4 is arranged, and the exhaust structure 4 enables an exhaust channel 5 to be formed between the shell 1 and the pole group 2, so that when gas is generated in the battery, the gas can flow to the explosion-proof valve 3 along the exhaust channel 5, the explosion-proof valve 3 can be opened in time, the pressure relief in the battery is realized, and the safety performance of the battery is improved;

2. the exhaust structure 4 is a convex part 41 arranged on the shell body 10, and the inner wall of the convex part 41 is contacted with the outer wall of the pole group 2, so that an exhaust channel 5 is formed between the inner wall of the shell body 10 and the outer wall of the pole group 2, and the structure is simple and easy to manufacture;

3. the extension length of the protruding part 41 along the thickness direction of the shell 1 is 0.05-0.6 times of the thickness of the shell 1, so that on one hand, the abutting between the shell 1 and the pole group 2 can be ensured, the stable limiting effect on the pole group 2 is realized, the pole group 2 is prevented from shaking in the shell 1, on the other hand, the width of the exhaust channel 5 can be ensured, the gas can smoothly and rapidly flow to the explosion-proof valve 3, and the timely air exhaust and pressure relief can be realized; also, since the extension length of the protruding portion 41 is smaller than the thickness of the case 1, the exhaust passages 5 around the protruding portion 41 communicate, so that the gas in the battery case 1 can flow to the explosion-proof valve 3.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims

1. A battery, comprising:

a housing;

the pole group is arranged in the shell;

the explosion-proof valve is arranged on the side wall of the shell;

the exhaust structure is arranged between the inner wall of the shell and the outer wall of the pole group, so that an exhaust channel is formed between the shell and the pole group; the exhaust passage extends to the explosion-proof valve.

2. The battery of claim 1, wherein the housing comprises a housing body, the vent structure comprises a protrusion disposed on an inner wall of the housing body, the inner wall of the protrusion abuts an outer wall of the pole set, and a gap between the inner wall of the housing body and the outer wall of the pole set forms the vent passage.

3. The battery according to claim 2, wherein the protrusion includes a protrusion integrally punched from the case body toward a side close to the pole group, or the protrusion includes a protrusion fixedly provided on the case body.

4. A battery according to claim 2 or 3, wherein the extension length of the convex portion in the thickness direction of the case is s, and the thickness of the case is e, s being 0.05 to 0.6 times of e.

5. A battery according to claim 2 or 3, wherein the height of the protruding portion protruding from the case body is 0.3 to 5.5mm.

6. A battery according to any one of claims 1 to 3, wherein the explosion-proof valve is provided in one or more, and a plurality of the vent structures are provided at intervals around the periphery of each of the explosion-proof valves.

7. The battery of claim 6, wherein a shortest distance between the vent structure and the explosion-proof valve is 10-200 mm.

8. A battery according to claim 2 or 3, wherein the cross section of the convex portion in the convex direction is rectangular or circular.

9. A battery module comprising the battery of any one of claims 1-8.

10. A power plant comprising a battery according to any one of claims 1-8 or a battery module according to claim 9.