CN220585426U

CN220585426U - Battery housing, battery and power equipment

Info

Publication number: CN220585426U
Application number: CN202321987424.2U
Authority: CN
Inventors: 许紫光; 袁文静; 黄荣; 王彦红
Original assignee: Beijing Electric Vehicle Co Ltd
Current assignee: Beijing Electric Vehicle Co Ltd
Priority date: 2023-07-26
Filing date: 2023-07-26
Publication date: 2024-03-12
Anticipated expiration: 2033-07-26

Abstract

The utility model discloses a battery shell, a battery and power equipment, wherein the battery shell comprises an upper shell, a lower shell, a supporting piece and a fastening piece, wherein the upper shell is arranged on the lower shell and is provided with a containing cavity suitable for containing a battery core; a weak part is formed on the upper shell; the supporting piece is arranged in the accommodating cavity, one end of the supporting piece is connected with the lower shell, and the other end of the supporting piece is connected with the weak part; at least a portion of the fastener is disposed on the frangible portion through which the fastener passes to connect to the support. According to the battery shell, the battery can be subjected to air discharge and pressure relief through the weak part, an explosion-proof valve does not need to be additionally arranged, the cost is reduced, the structural stability of the battery shell can be improved, the vibration noise is reduced, the response speed of the battery for explosion-proof pressure relief is improved, and the risk that external foreign matters enter the accommodating cavity is reduced.

Description

Battery housing, battery and power equipment

Technical Field

The utility model relates to the field of batteries, in particular to a battery shell, a battery and power equipment.

Background

When the battery is out of control, the internal temperature of the battery rises, and the battery is required to be subjected to air discharge and pressure relief, so that the battery is prevented from being ignited and exploded due to expansion. The battery shell is usually provided with an explosion-proof valve, and the explosion-proof valve can be used for carrying out air discharge and pressure relief on the battery when the internal temperature and the internal pressure of the battery rise.

In the related art, the explosion-proof valve has more parts and high cost. The provision of the explosion-proof valve increases the cost of the battery. In addition, the structural stability of the battery case is poor, and vibration noise may be generated by shaking the case.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present utility model is to propose a battery case. According to the battery shell, the battery can be subjected to air discharge and pressure relief through the weak part, an explosion-proof valve does not need to be additionally arranged, the cost is reduced, the structural stability of the battery shell can be improved, the vibration noise is reduced, the response speed of the battery for explosion-proof pressure relief is improved, and the risk that external foreign matters enter the accommodating cavity is reduced.

The utility model further provides a battery comprising the battery shell.

The utility model also provides power equipment comprising the battery.

The battery case according to the present utility model includes: the upper shell is arranged on the lower shell and defines a containing cavity suitable for containing the battery cell; a weak part is formed on the upper shell; the supporting piece is arranged in the accommodating cavity, one end of the supporting piece is connected with the lower shell, and the other end of the supporting piece is connected with the weak part; and a fastener, at least part of which is arranged on the weak part, passing through the weak part to be connected with the supporting piece.

According to the battery shell, the supporting piece is arranged in the accommodating cavity and connects the lower shell with the upper shell, and the supporting piece can support the upper shell, so that the upper shell is kept stable, and vibration noise generated by shaking of the upper shell is reduced. The upper shell is provided with a weak part which is easy to break under the action of the internal pressure of the battery so that the accommodating cavity is communicated with the outside, and therefore the battery is subjected to air discharge and pressure relief. Through setting up the fastener, the weak portion forms stress concentration in the part of contacting with the fastener, makes the weak portion fracture more easily under the effect of battery internal pressure, improves the response speed of explosion-proof pressure release of battery to the weak portion can take place to fracture at the border with fastener contact portion, and fracture portion is fastened between fastener and support piece by the fastener, can reduce the risk that external foreign matter got into the holding chamber.

According to some embodiments of the utility model, the fastener comprises: the limiting part is abutted against the weak part; the connecting part is connected with the limiting part and penetrates through the weak part; wherein, be formed with the mating hole on the support piece, at least part of connecting portion acceptd in the mating hole.

According to some embodiments of the utility model, the support has a radially extending extension formed on the other end.

According to some embodiments of the utility model, the battery case further comprises: and the sealing piece is arranged between the other end of the supporting piece and the weak part.

According to some embodiments of the utility model, the extension is formed with a seal groove opening toward the weakened portion and surrounding the mating hole, and the seal is disposed within the seal groove.

According to some embodiments of the utility model, the upper housing further comprises: the shell body is connected with the weak part, and the thickness of the weak part is smaller than that of the shell body.

According to some embodiments of the utility model, the frangible portion is convex towards the direction away from the receiving chamber or concave towards the receiving chamber.

According to some embodiments of the utility model, the frangible portion, the support and the fastener are each configured as a plurality disposed in correspondence with one another.

The battery according to the present utility model is briefly described below.

A battery according to the present utility model includes a battery case as described in any one of the embodiments above. Because the battery according to the utility model comprises the battery shell according to any one of the embodiments, the battery according to the utility model can realize the exhaust and pressure relief through the weak part of the battery shell without additionally arranging an explosion-proof valve, thereby reducing the cost, and the battery shell has strong structural stability, small vibration noise, high response speed of the exhaust and pressure relief of the battery and high safety.

The power plant according to the utility model is briefly described below.

The power plant according to the utility model comprises a battery as described in any one of the embodiments described above. Since the power equipment according to the utility model comprises the battery in any one of the embodiments, the power equipment according to the utility model has low cost, stable and reliable structure, can reduce noise when the power equipment is operated, and can quickly exhaust and release pressure when the battery is out of control, so that the power equipment is safe and reliable to operate.

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 structural view of a battery case according to an embodiment of the present utility model;

FIG. 2 is an assembly view of a frangible portion, support and fastener according to one embodiment of the present utility model;

figure 3 is a cross-sectional view of a frangible portion, support and fastener according to one embodiment of the present utility model.

Reference numerals:

a battery case 1;

an upper case 11, a weak portion 111, and a case body 112;

a lower housing 12;

a support 13, a mating hole 131, an extension 132, a seal groove 133;

a fastener 14, a limit part 141, and a connecting part 142;

and a seal 15.

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.

A battery case according to an embodiment of the present utility model is described below with reference to fig. 1 to 3.

As shown in fig. 1 to 3, the battery case 1 according to the present utility model includes an upper case 11, a lower case 12, a support 13, and a fastener 14, the upper case 11 being disposed on the lower case 12 and defining a receiving cavity adapted to receive a battery cell; the upper case 11 is formed with a weak portion 111; the supporting piece 13 is arranged in the accommodating cavity, one end of the supporting piece 13 is connected with the lower shell 12, and the other end of the supporting piece 13 is connected with the weak part 111; at least part of the fastener 14 is provided on the weakened portion 111, and the fastener 14 passes through the weakened portion 111 to be connected to the support 13.

In the related art, the structural stability of the battery case is poor, and vibration noise is generated by shaking the case.

The battery case 1 of this application, upper case 11 sets up on lower case 12 and forms and holds the chamber, holds the intracavity and can hold the electric core. By providing the supporting member 13, the supporting member 13 is disposed in the accommodating chamber and connects the lower housing 12 with the upper housing 11, and the supporting member 13 can support the upper housing 11, so that the upper housing 11 is kept stable, and vibration noise generated due to shaking of the upper housing 11 is reduced.

In the related art, the explosion-proof valve has more parts and high cost. The provision of the explosion-proof valve increases the cost of the battery.

The battery case 1 of the present application is formed with the weak portion 111 on the upper case 11, the weak portion 111 being the portion of the upper case 11 where the strength is the lowest, the weak portion 111 being easily broken under the effect of the internal pressure of the battery to communicate the accommodating chamber with the outside, thereby venting and depressurizing the battery. The support member 13 is connected to the weak portion 111, at least part of the fastener 14 is arranged on the weak portion 111, the fastener 14 penetrates through the weak portion 111 to be connected to the support member 13, and by arranging the fastener 14, the weak portion 111 forms stress concentration at the portion contacted with the fastener 14, so that the weak portion 111 is easier to break under the action of internal pressure of a battery, the response speed of explosion-proof pressure relief of the battery is improved, the weak portion 111 can break at the edge of the portion contacted with the fastener 14, the broken portion is fastened between the fastener 14 and the support member 13 by the fastener 14, and the risk that external foreign matters enter the accommodating cavity can be reduced.

Therefore, the battery case 1 of this application can make the battery exhaust pressure release through weak portion 111, need not to set up the explosion-proof valve in addition, reduce cost to through setting up fastener 14 and support piece 13, can improve the structural stability of battery case 1, reduce vibration noise, improve the response speed of explosion-proof pressure release of battery simultaneously, and reduce the risk that external foreign matter got into the holding chamber.

According to some embodiments of the present utility model, as shown in fig. 2, the fastener 14 includes a limiting portion 141 and a connecting portion 142, and the limiting portion 141 is stopped against the weak portion 111; the connecting portion 142 is connected with the limiting portion 141 and penetrates through the weak portion 111; wherein, the supporting member 13 is formed with a fitting hole 131, and at least a portion of the connecting portion 142 is accommodated in the fitting hole 131. The limiting part 141 is abutted against the weak part 111 to form rigid constraint on the weak part 111, so that stress concentration is formed, and the weak part 111 breaks along the edge of the contact part with the limiting part 141 under the action of internal pressure of the battery, so that the battery is subjected to pressure relief. The connecting portion 142 is used to pass through the weakened portion 111 to connect with the support member 13, and the fastener 14 is connected with the support member 13 to form a restraining effect on the weakened portion 111. The supporting piece 13 is provided with the matching hole 131, and at least part of the connecting part 142 is accommodated in the matching hole 131, so that the fastening piece 14 can be conveniently matched and connected with the supporting piece 13, and the fastening piece 14 and the supporting piece 13 can be stably connected.

In some embodiments, the inner peripheral wall of the fitting hole 131 is formed with a first thread, and the outer peripheral wall of the connection part 142 is formed with a second thread, and the first thread is fitted with the second thread. The fastener 14 can be connected to the support 13 through the cooperation of first screw thread and second screw thread, and screw thread cooperation can make things convenient for the installation and the dismantlement of fastener 14, improves the maintainability of battery.

According to some embodiments of the utility model, as shown in fig. 2 and 3, the other end of the support 13 is formed with a radially extending extension 132. The other end of the supporting member 13 is used for being connected with the weak portion 111, and the extension portion 132 extends along the radial direction of the end portion of the supporting member 13, so that the area of the supporting member 13, which is matched with the weak portion 111, can be increased, and the supporting effect of the supporting member 13 on the upper shell 11 is enhanced.

According to some embodiments of the present utility model, as shown in fig. 3, the battery case 1 further includes a sealing member 15, and the sealing member 15 is disposed between the other end of the support member 13 and the weak portion 111. By providing the sealing member 15 between the other end of the supporting member 13 and the weak portion 111, the sealing member 15 can seal the gap between the supporting member 13 and the weak portion 111, enhance the sealability of the battery case 1, reduce the risk of leakage of the electrolyte in the internal accommodating chamber of the battery, and simultaneously reduce the risk of entry of external impurities into the accommodating chamber.

According to some embodiments of the present utility model, as shown in fig. 2 and 3, a seal groove 133 that is opened toward the weak portion 111 and surrounds the fitting hole 131 is formed on the extension portion 132, and the seal 15 is disposed in the seal groove 133. The extension 132 is formed with a seal groove 133, and the seal groove 133 is opened toward the weak portion 111, so that the seal 15 provided in the seal groove 133 can seal between the support 13 and the weak portion 111. The seal groove 133 may facilitate positioning and installation of the seal 15, reducing the risk of loosening the seal 15. The sealing member 15 may be a sealing strip or a sealant. The seal groove 133 surrounds the mating hole 131, so that the sealing member 15 can be disposed around the mating hole 131 to separate the fastening member 14 from the accommodating cavity, and the sealing effect is good.

According to some embodiments of the present utility model, as shown in fig. 1 and 2, the upper case 11 further includes a case body 112, the case body 112 is connected with the weak portion 111, and the thickness of the weak portion 111 is smaller than that of the case body 112. The housing body 112 is a portion of the upper housing 11 having a high strength, and serves to bear the overall structural strength of the upper housing 11. The weak portion 111 is a portion of the upper case 11 having a low strength for locally weakening the upper case 11 so that the battery can be discharged through the weak portion 111. The thickness of the weak portion 111 is smaller than that of the case body 112, so that the strength of the weak portion 111 can be smaller than that of the case body 112, and the method is high in practicality and low in cost.

According to some embodiments of the utility model, the weaknesses 111 are convex towards the direction away from the receiving chamber or concave towards the receiving chamber as shown in fig. 3. The weak portion 111 may be formed by punching the upper case 11. The thickness of the weak portion 111 can be smaller than that of the case body 112 by stamping, and meanwhile the weak portion 111 can be protruded in a direction away from the accommodating cavity or recessed in the accommodating cavity, so that the processing and forming are convenient. The weak part 111 protrudes towards the direction away from the accommodating cavity or is sunken towards the accommodating cavity, so that the weak part 111 and the shell body 112 can be conveniently distinguished, and therefore, the mounting and positioning of parts during the assembly of the battery shell 1 are facilitated, the assembly speed of a product is accelerated, and the production period of the product is shortened.

According to some embodiments of the present utility model, as shown in fig. 1, the weak portion 111, the supporting member 13, and the fastening member 14 are respectively configured as a plurality disposed corresponding to each other. The weak portion 111, the supporting member 13 and the fastening member 14 are combined to form a supporting and pressure releasing assembly, which can support the upper case 11 and simultaneously can release the pressure of the battery by exhausting the pressure of the accommodating chamber to prevent the explosion of the battery. The weak portion 111, the support piece 13 and the fastener 14 are respectively configured to be a plurality of supporting pressure relief components which are correspondingly arranged, the plurality of supporting pressure relief components simultaneously support the upper shell 11, the integral stability of the structure of the battery shell 1 is enhanced, and the plurality of supporting pressure relief components can simultaneously carry out pressure relief and exhaust on the battery, so that the efficiency of pressure relief and exhaust of the battery is improved, and the safety of the battery is improved.

The battery according to the present utility model is briefly described below.

The battery according to the present utility model includes the battery case 1 in any one of the embodiments described above. Since the battery according to the present utility model includes the battery case 1 in any one of the above embodiments, the battery according to the present utility model can be discharged through the weak portion 111 of the battery case 1 without additionally providing an explosion-proof valve, thereby reducing the cost, and the battery case 1 has strong structural stability, low vibration noise, high response speed of the discharge of the battery, and high safety.

The power plant according to the utility model is briefly described below.

The power plant according to the utility model comprises a battery according to any of the embodiments described above. The power equipment comprises the battery in any embodiment, so that the power equipment is low in cost, stable and reliable in structure, capable of reducing noise when the power equipment is operated, capable of rapidly exhausting and releasing pressure when the battery is out of control, and safe and reliable in operation.

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.

In the description of the utility model, a "first feature" or "second feature" may include one or more of such features.

In the description of the present utility model, "plurality" means two or more.

In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," 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.

Claims

1. A battery case, comprising:

an upper housing (11) and a lower housing (12), the upper housing (11) being disposed on the lower housing (12) and defining a receiving cavity adapted to receive a battery cell; a weak part (111) is formed on the upper shell (11);

the supporting piece (13), the supporting piece (13) is arranged in the accommodating cavity, one end of the supporting piece (13) is connected with the lower shell (12), and the other end of the supporting piece (13) is connected with the weak part (111);

-a fastener (14), at least part of the fastener (14) being arranged on the weakening (111), the fastener (14) passing through the weakening (111) to be connected to the support (13).

2. The battery housing according to claim 1, wherein the fastener (14) comprises:

a limit part (141), wherein the limit part (141) is abutted against the weak part (111);

a connecting portion (142), the connecting portion (142) being connected to the limit portion (141) and penetrating through the weak portion (111);

wherein, the supporting piece (13) is provided with a matching hole (131), and at least part of the connecting part (142) is accommodated in the matching hole (131).

3. The battery housing according to claim 2, characterized in that the other end of the support (13) is formed with a radially extending extension (132).

4. The battery case according to claim 3, further comprising: and a seal member (15), wherein the seal member (15) is arranged between the other end of the support member (13) and the weak portion (111).

5. The battery case according to claim 4, wherein the extension (132) is formed with a seal groove (133) that is open to the weakened portion (111) and surrounds the mating hole (131), and the seal member (15) is disposed in the seal groove (133).

6. The battery case according to claim 1, wherein the upper case (11) further includes: and the shell body (112), wherein the shell body (112) is connected with the weak part (111), and the thickness of the weak part (111) is smaller than that of the shell body (112).

7. The battery housing according to claim 6, characterized in that the weakening (111) protrudes in a direction away from the receiving cavity or is recessed in a direction towards the receiving cavity.

8. The battery case according to claim 1, wherein the weak portion (111), the support member (13), and the fastener (14) are respectively configured as a plurality disposed corresponding to each other.

9. A battery, characterized by comprising a battery housing (1) according to any one of claims 1-8.

10. A power plant comprising a battery according to claim 9.