CN216120621U

CN216120621U - Battery shell and battery with same

Info

Publication number: CN216120621U
Application number: CN202122634648.2U
Authority: CN
Inventors: 王俊; 夏天军; 姬嘉帅; 于东朋; 左帆帆; 宁亚军; 娄佳训; 高顺航; 杨红新; 骆兆军
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-03-22
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a battery shell and a battery with the same, wherein the battery shell comprises: the explosion-proof valve comprises a shell main body and an explosion-proof valve, wherein the shell main body is in a box shape, two ends of the shell main body in the length direction are open, and a mounting opening is formed in the side wall of the shell main body; the explosion-proof valve is arranged at the position of the mounting opening and covers the mounting opening. According to the battery shell, the explosion-proof valve is arranged on the side wall of the shell main body, so that the explosion-proof valve is opened under the condition that the battery expands, more other components can be prevented from being damaged, and the safety accident caused by the fire and explosion of the whole battery module can be avoided.

Description

Battery shell and battery with same

Technical Field

The utility model relates to the technical field of power supplies, in particular to a battery shell and a battery with the same.

Background

Point out among the correlation technique, traditional battery generally has constitutions such as aluminum hull, apron, and the apron is connected with the aluminum hull through welding mode, and the explosion-proof valve sets up on the apron, and when the inside thermal runaway of electricity core, the explosion-proof valve is opened, prevents the explosion of electricity core.

The safety device explosion-proof valve of battery is in the same direction with electrode terminal, and electrode terminal of different batteries passes through the connection piece to be connected in the module, and components and parts such as signal acquisition in the module all set up near electrode terminal simultaneously. If the battery is out of control, the explosion-proof valve is opened, and other even sparks of inside electrolyte and high temperature can cause other components and parts of module impaired at explosion-proof valve port portion blowout, serious can cause the explosion on fire of whole module, cause the incident.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the utility model provides a battery shell, wherein the explosion-proof valve is arranged on the side wall of the shell main body of the battery shell, so that the explosion-proof valve is opened under the condition that the battery expands, more other components are prevented from being damaged, and the safety accident caused by the fire and explosion of the whole battery module is avoided.

The utility model also provides a battery.

A battery case according to a first aspect of the utility model includes: the shell comprises a shell main body, a shell cover and a shell body, wherein the shell main body is in a box body shape, two ends of the shell main body in the length direction are open, and a mounting opening is formed in the side wall of the shell main body; and the explosion-proof valve is arranged at the position of the mounting opening and covers the mounting opening in a sealing manner.

According to the battery shell, the explosion-proof valve is arranged on the side wall of the shell main body, so that the explosion-proof valve is opened under the condition that the battery expands, more other components can be prevented from being damaged, and the safety accident caused by the fire and explosion of the whole battery module can be avoided.

In some embodiments, the battery case further includes two cover plates respectively covering the opened both ends of the case main body, the explosion-proof valve being spaced apart from the cover plates.

In some embodiments, the mounting port is formed at a bottom of the case main body, and/or the mounting port is located at a middle position of the case main body in a length direction.

In some embodiments, the housing main body has an outer surface formed with a recess depressed inward, the mounting port is located inside the recess, and the explosion-proof valve is received in the recess.

In some embodiments, an outer side surface of the explosion-proof valve does not exceed a peripheral edge of the groove in an axial direction of the mounting port.

In some embodiments, the shell body has a wall thickness greater than 0.6 mm.

In some embodiments, further comprising: a protection sheet provided on an outer side surface of the case main body and completely covering the explosion-proof valve.

In some embodiments, the protective sheet has a peripheral edge fixedly connected to the housing body and a central portion projecting outwardly away from the explosion-proof valve.

In some embodiments, the explosion-proof valve is welded to the housing body.

A battery according to a second aspect of the present invention includes a battery case according to the first aspect of the present invention and a cell provided in the battery case.

According to the battery of the utility model, the battery shell of the first aspect is arranged, so that the overall performance of the battery is improved.

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 accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic diagram of a battery housing according to an embodiment of the utility model;

FIG. 2 is an enlarged view at A shown in FIG. 1;

FIG. 3 is a cross-sectional view of the battery housing shown in FIG. 1;

FIG. 4 is an enlarged view at B shown in FIG. 3;

fig. 5 is an exploded view of the battery case shown in fig. 1.

Reference numerals:

100. a housing main body; 110. an installation port; 120. a groove;

200. an explosion-proof valve;

300. and (4) protecting the sheet.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

A battery case according to an embodiment of the first aspect of the utility model is described below with reference to fig. 1 to 5.

As shown in fig. 5, a battery case according to an embodiment of the first aspect of the present invention includes: a housing body 100 and an explosion-proof valve 200.

Specifically, as shown in fig. 1, the case main body 100 is box-shaped and is open at both ends in a length direction (e.g., a left-right direction shown in fig. 1), and a mounting opening 110 is formed on a side wall of the case main body 100; explosion-proof valve 200 locates installing port 110 position and closing cap installing port 110, and explosion-proof valve 200 sets up on the lateral wall of shell main part 100, like this, takes place under the circumstances of inflation at the battery, and explosion-proof valve 200 is opened, can avoid more other components and parts impaired, avoids the explosion on fire of whole battery module, causes the incident.

For example, as shown in fig. 5, the explosion-proof valve 200 is installed on the installation opening 110 of the side wall of the casing main body 100, so that when the battery core expands, the explosion-proof valve 200 is opened to release the pressure, the number of components around the side wall of the casing main body 100 is small, the excessive other components are not damaged, meanwhile, the fire and explosion of the whole battery module are avoided, meanwhile, the loss is reduced, and the maintenance cost is reduced.

According to the battery case of the present invention, the explosion-proof valve 200 is disposed on the side wall of the case main body 100, so that the explosion-proof valve 200 is opened when the battery expands, thereby preventing more other components from being damaged, preventing the entire battery module from being ignited and exploded to cause safety accidents, and reducing loss and maintenance cost.

In an embodiment of the present invention, the battery case may further include two cover plates, the two cover plates are respectively sealed at the two open ends of the case main body 100, the explosion-proof valve 200 is spaced apart from the cover plates, and the explosion-proof valve 200 is spaced apart from the cover plates, so that it is avoided that when the battery cell expands, the explosion-proof valve 200 is opened and other components on the cover plates are damaged.

It should be noted that, in the existing battery, the explosion-proof valves are all disposed on the cover plate, and the cover plate is provided with a plurality of components connected to the battery core, when the battery core expands, and the pressure relief is opened by the explosion-proof valves under the condition that the internal air pressure of the shell main body increases, which may discharge the electrolyte in the battery core, even may generate electric sparks, and easily damages other components on the cover plate, and in the battery module, it may also damage the adjacent battery, resulting in the fire and explosion of the whole battery module, and causing a safety accident.

For example, referring to fig. 1, cover plates are closed at both open ends of a case body 100, and an explosion-proof valve 200 is disposed on a side wall of the case body 100 so as to space the cover plates from the explosion-proof valve 200, so that when a cell expands and the explosion-proof valve 200 is opened, electrolyte or electric sparks sprayed from the explosion-proof valve 200 do not damage other components on the cover plates, causing unnecessary loss.

In one embodiment of the present invention, as shown in fig. 1, the mounting port 110 is formed at the bottom of the case body 100, and/or the mounting port 110 is located at a middle position of the case body 100 in the length direction, so that the explosion-proof valve 200 can be spaced apart from the cover plate to prevent electrolyte or electric sparks, etc. ejected from the explosion-proof valve 200 from damaging components on the cover plate.

For example, as shown in fig. 1, the mounting port 110 is formed at the bottom of the case main body 100 at a middle position in the length direction, so that, in the case where the battery cell swells and the explosion-proof valve 200 is opened, the electrolyte or the electric spark discharged from the explosion-proof valve 200 is directly discharged to the lower side of the battery without causing secondary pollution and damage to the battery.

In one embodiment of the present invention, as shown in fig. 2, an inwardly recessed groove 120 is formed on an outer surface of the case body 100, the mounting port 110 is located inside the groove 120, and the explosion-proof valve 200 is received in the groove 120, so that the explosion-proof valve 200 can be fixed to the case body 100, and at the same time, the explosion-proof valve 200 can directly contact the inside of the case body 100 through the mounting port 110, so that the explosion-proof valve 200 can sense the pressure inside the case body 100.

For example, as shown in fig. 1, an inwardly recessed groove 120 is formed on the bottom surface of the case main body 100, the mounting port 110 is located inside the groove 120, the explosion-proof valve 200 is accommodated in the groove 120, when the battery cell expands, the air pressure in the case main body 100 increases, and when the air pressure in the case main body 100 reaches the threshold value of the explosion-proof valve 200, the explosion-proof valve 200 is opened to release the pressure, thereby preventing the explosion caused by the excessive air pressure inside the case main body 100.

In one embodiment of the present invention, as shown in fig. 3, in the axial direction of the mounting port 110, the outer side surface of the explosion-proof valve 200 does not exceed the periphery of the groove 120, that is, the outer side surface of the explosion-proof valve 200 may be flush with the outer surface of the case main body 100, and the outer side surface of the explosion-proof valve 200 may also be located inside the outer surface of the case main body 100, so that the explosion-proof valve 200 does not occupy the space of other parts than the case main body 100. The embodiment of the present invention is not limited thereto, and the outer side surface of the explosion-proof valve 200 may be protruded from the circumference of the groove 120.

In one embodiment of the present invention, as shown in fig. 3, the wall thickness of the shell main body 100 is greater than 0.6mm, that is, if the wall thickness of the shell main body 100 is a (a shown in fig. 3), the value of a is greater than or equal to 0.6mm, and in a specific implementation, the wall thickness of the shell main body 100 can be set to 0.7mm, 0.8mm, 0.9mm, 1.0mm, 1.1mm and 1.2mm according to practical situations.

It should be noted that, the explosion-proof valve 200 is welded to the housing main body 100, and the welding requires the housing main body 100 to have a sufficient thickness, and if the thickness of the housing main body 100 is too small, the welded portion between the housing main body 100 and the explosion-proof valve 200 is easily deformed during the welding of the explosion-proof valve 200, which affects the normal use of the housing main body 100.

For example, as shown in fig. 3, the wall thickness of the case main body 100 is set to 1.0mm, so that, on the one hand, the thickness of the case main body 100 can be ensured to meet the basic requirement of welding, and at the same time, the case main body 100 is ensured to have a sufficient thickness so that the outer side surface of the explosion-proof valve 200 does not exceed the peripheral edge of the groove 120.

In one embodiment of the present invention, as shown in fig. 5, the battery case may further include a protection sheet 300, the protection sheet 300 is disposed on the outer side surface of the case body 100 and completely covers the explosion-proof valve 200, the protection sheet 300 is used to protect the explosion-proof valve 200 from the external environment, for example, the battery may be in the environment where dust and fine particles are likely to be present, there is a risk of blocking the explosion-proof valve 200, and the provision of the protection sheet 300 can well solve such a problem.

For example, as shown in fig. 5, the protection sheet 300 is disposed on the outer side of the explosion-proof valve 200, and the protection sheet 300 completely covers the explosion-proof valve 200, so that dust or fine particles in the external environment can be blocked by the protection sheet 300 after the dust or fine particles come around the explosion-proof valve 200 during the use of the battery, thereby preventing the dust and fine particles from blocking the explosion-proof valve 200 and affecting the normal operation of the explosion-proof valve 200.

In an embodiment of the utility model, as shown in fig. 5, the circumference of the protection sheet 300 is fixedly connected with the casing main body 100, and the middle part of the protection sheet protrudes outward in a direction away from the explosion-proof valve 200, it should be noted that when the cell expands and the air pressure inside the casing main body 100 increases, the explosion-proof valve 200 is protruded, and the protection sheet 300 is configured to protrude outward, so that the protrusion of the explosion-proof valve 200 can be avoided.

It should be noted that the protection sheet 300 is adhered to the housing main body 100, so that on one hand, the protection sheet 300 can well protect the explosion-proof valve 200, and on the other hand, when the explosion-proof valve 200 is opened for pressure relief, the protection sheet 300 can be easily flushed away, and the pressure relief of the explosion-proof valve 200 cannot be affected.

In one embodiment of the present invention, as shown in fig. 3, the explosion-proof valve 200 is welded to the housing body 100, and the welded connection has good air-tightness and water-tightness, and has high structural rigidity and good structural integrity.

Wherein, the shell main body 100 is an aluminum shell, aluminum can be rapidly oxidized in air, the obtained aluminum oxide surface coating can resist further erosion of air, water and chemical substances, the weight of the aluminum is only one third of that of steel, the aluminum has the highest strength weight ratio of all metals, and the aluminum can be recovered by 100 percent.

A battery according to an embodiment of the second aspect of the present invention includes the battery case according to the embodiment of the first aspect of the present invention, and a battery cell disposed in the battery case.

Other constructions of the battery according to embodiments of the utility model, such as tabs and electrodes, and the like, and operation are known to those of ordinary skill in the art and will not be described in detail herein.

According to the battery provided by the embodiment of the utility model, the battery shell of the embodiment of the first aspect is arranged, so that the overall performance of the battery is improved.

A battery case according to an embodiment of the present invention will be described with reference to fig. 1 to 5.

Referring to fig. 5, a battery case according to a specific embodiment of the present invention may include: a case body 100, an explosion-proof valve 200, a cover plate, and a protection sheet 300.

Casing main part 100 is the aluminum hull, and the wall thickness of casing main part 100 is 0.8mm, and casing main part 100 is and opens with the bodily form shape and in length direction's both sides, is formed with inside sunken recess 120 on the middle part position of the diapire of casing main part 100, and installing port 110 is located the inboard of recess 120, and explosion-proof valve 200 holds in recess 120.

The explosion-proof valve 200 is provided at the position of the mounting opening 110 and covers the mounting opening 110, the outer side surface of the explosion-proof valve 200 does not exceed the peripheral edge of the groove 120 in the circumferential direction of the mounting opening 110, and the explosion-proof valve 200 is welded to the case main body 100.

The cover plate covers the open end of the case main body 100.

The protector sheet 300 is provided on the outer side surface of the case main body 100 and completely covers the explosion-proof valve 200, and the protector sheet 300 has a peripheral edge fixedly connected to the case main body 100 and a middle portion protruding outward in a direction away from the explosion-proof valve 200.

Specifically, as shown in fig. 3, in the normal operation process of the battery, the protection sheet 300 protects the explosion-proof valve 200, and prevents the explosion-proof valve 200 from being blocked by dust or particles in the external environment, which affects the normal operation of the explosion-proof valve 200, when the battery core expands and releases gas into the case main body 100, the gas pressure in the case main body 100 increases, and when the gas pressure in the case main body 100 reaches the threshold of the explosion-proof valve 200, the explosion-proof valve 200 opens to release the pressure, and the explosion-proof valve 200 can burst the protection sheet 300 to release the pressure to the outside.

According to the battery case of the present invention, the explosion-proof valve 200 is disposed on the side wall of the case main body 100, so that the explosion-proof valve 200 is opened when the battery expands, thereby preventing many other components from being damaged, and preventing the entire battery module from being ignited and exploded to cause a safety accident.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean 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, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. 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 utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A battery case, comprising:

the shell comprises a shell main body, a shell cover and a shell body, wherein the shell main body is in a box body shape, two ends of the shell main body in the length direction are open, and a mounting opening is formed in the side wall of the shell main body;

and the explosion-proof valve is arranged at the position of the mounting opening and covers the mounting opening in a sealing manner.

2. The battery case according to claim 1, further comprising two cover plates respectively covering the opened both ends of the case main body, the explosion-proof valve being spaced apart from the cover plates.

3. The battery case according to claim 1, wherein the mounting port is formed at a bottom of the case main body, and/or the mounting port is located at a middle position of the case main body in a length direction.

4. The battery case according to claim 1, wherein a recess is formed on an outer surface of the case main body to be depressed inward, the mounting port is located inside the recess, and the explosion-proof valve is received in the recess.

5. The battery case according to claim 4, wherein an outer side surface of the explosion-proof valve does not exceed a peripheral edge of the groove in an axial direction of the mounting port.

6. The battery case as recited in any one of claims 1-5, wherein the shell body has a wall thickness of greater than 0.6 mm.

7. The battery case according to any one of claims 1 to 5, further comprising: a protection sheet provided on an outer side surface of the case main body and completely covering the explosion-proof valve.

8. The battery case according to claim 7, wherein the protective sheet has a peripheral edge fixedly connected to the case main body and a middle portion projecting outward in a direction away from the explosion-proof valve.

9. The battery case according to any one of claims 1 to 5, wherein the explosion-proof valve is welded to the case main body.

10. A battery comprising a battery case according to any one of claims 1 to 9 and a cell disposed within the battery case.