CN215680918U

CN215680918U - Battery case, battery and electric equipment

Info

Publication number: CN215680918U
Application number: CN202121603316.1U
Authority: CN
Inventors: 郝恩超; 袁秀兰; 田姣
Original assignee: Ningde Amperex Technology Ltd
Current assignee: Ningde Amperex Technology Ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2022-01-28
Anticipated expiration: 2031-07-14

Abstract

The embodiment of the application relates to battery case, battery and consumer, and the battery case includes casing and sealing device, the casing is provided with accepts the chamber and communicates accept the notes liquid mouth in chamber, sealing device includes connecting piece and sealing member, the one end of connecting piece with the casing rotates to be connected, the other end of connecting piece with the sealing member is connected, through the rotation the connecting piece will the sealing member peg graft in annotate the liquid mouth with sealed annotate the liquid mouth. In this application, when the sealing member breaks away from annotating the liquid mouth, because the sealing member is connected with the casing of battery case through the connecting piece, the sealing member is difficult to drop and lose.

Description

Battery case, battery and electric equipment

Technical Field

The embodiment of the application relates to the technical field of batteries.

Background

A battery is a device that converts external energy into electric energy and stores the electric energy in the battery so as to supply power to external electric equipment (such as portable electronic equipment) at a desired time. At present, batteries are widely used in electric equipment such as unmanned aerial vehicles, mobile phones, tablets, notebook computers and the like. In some application scenarios, for example, a steel-shell battery, the battery includes a battery shell and a battery core, the battery shell includes a shell, the shell is provided with an accommodating cavity and a liquid injection port communicated with the accommodating cavity, the battery core is accommodated in the accommodating cavity, and the liquid injection port is used for injecting electrolyte into the battery core. After electrolyte is injected into the shell, the electrolyte injection port needs to be sealed by using a sealing piece so as to avoid electrolyte leakage.

In the process of implementing the present application, the applicant of the present application finds that: at present, the sealing member is independent of the shell setting of battery case, easily drops, and when the sealing member breaks away from annotating the liquid mouth, the sealing member also lost easily.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, embodiments of the present application provide a battery case, a battery, and a power consumption device, which overcome or at least partially solve the above-mentioned problem of easy detachment and loss of a sealing member.

According to an aspect of the embodiments of the present application, there is provided a battery case including a case body provided with a housing chamber and a liquid injection port communicating with the housing chamber, and a sealing device. The sealing device comprises a connecting piece and a sealing piece, one end of the connecting piece is rotatably connected with the shell, the other end of the connecting piece is connected with the sealing piece, and the sealing piece is inserted into the liquid injection port to seal the liquid injection port by rotating the connecting piece. Because the sealing element is connected with the shell through the connecting piece, when the sealing element is separated from the liquid injection port, the sealing device is not easy to fall off and lose.

In an optional manner, the battery case further includes a bracket and a connecting shaft, the bracket includes a first supporting member and a second supporting member, the first supporting member and the second supporting member are disposed in the casing relatively, the connecting shaft is connected to the first supporting member and the second supporting member respectively, and one end of the connecting member is connected to the connecting shaft, where the connecting shaft is rotatable with respect to the first supporting member and the second supporting member, or one end of the connecting member is rotatable with respect to the connecting shaft. Through setting up support and connecting axle, can make things convenient for the connecting piece to rotate for the casing.

In an alternative mode, the battery case further includes a rotation shaft, the rotation shaft is connected to one end of the connection member, the rotation shaft is connected to the case, and the rotation shaft is rotatable with respect to the case, or one end of the connection member is rotatable with respect to the rotation shaft. Through the setting of rotation axis, can make things convenient for the connecting piece to rotate for the casing.

In an alternative mode, a through hole is formed in one end of the connecting piece, the rotating shaft comprises a shaft core and a cap, one end of the shaft core penetrates through the through hole and then is connected to the shell, the shaft core can rotate in the through hole, the cap is arranged at the other end of the shaft core, and the area of the cross section of the cap is larger than that of the cross section of the through hole, so that the connecting piece is not prone to being separated from the rotating shaft when the connecting piece rotates relative to the shell.

In an alternative mode, the sealing element comprises a sealing cover and a sealing plug, the sealing cover is connected with one end of the connecting element, one end of the sealing plug is connected with the sealing cover, and the other end of the sealing plug is used for being plugged into the liquid injection port so as to seal the liquid injection port; the area of the cross section of the sealing cover is larger than that of the cross section of the sealing plug, when the sealing plug is inserted into the liquid injection port, the sealing cover is used for being attached to the shell, so that the sealing plug is inserted into the liquid injection port through the sealing cover, the sealing plug is pulled out from the liquid injection port through the sealing cover, the sealing element is sealed, the liquid injection port is convenient, and the sealing element is separated from the liquid injection port.

In an alternative mode, the housing is made of metal, and the sealing cover is made of metal.

In an alternative mode, the sealing cover and the shell are fixedly welded, so that the sealing between the sealing element and the shell is enhanced, and the sealing plug in the sealing element is not easy to separate from the liquid filling opening when the battery shell is moved or external force is applied to the battery shell.

In an optional mode, from the surface of the shell body where the liquid injection port is located towards the direction of the containing cavity, the area of the cross section of the liquid injection port is gradually reduced, so that the sealing element is conveniently plugged into the liquid injection port.

In an alternative form, the sealing plug comprises a first part and a second part, the first part and the second part being connected, the end of the first part remote from the second part being connected to the sealing cap; in the direction from the first portion to the second portion, the area of the cross section of the first portion gradually increases, and the area of the cross section of the second portion gradually decreases. Thereby the sealing plug is convenient to be inserted into the liquid injection port, and the liquid injection port can be sealed.

According to another aspect of the embodiments of the present application, a battery is provided, which includes a battery core and the above battery case, wherein the battery core is accommodated in the accommodating cavity.

According to still another aspect of the embodiments of the present application, there is provided an electric device including the battery described above.

The beneficial effects of the embodiment of the application are that: the battery shell comprises a shell body and a sealing device, wherein the shell body comprises an accommodating cavity and a liquid injection port communicated with the accommodating cavity, the sealing device comprises a connecting piece and a sealing piece, one end of the connecting piece is rotatably connected with the shell body, the other end of the connecting piece is connected with the sealing piece, and the sealing piece can be inserted into the liquid injection port to seal the liquid injection port by rotating the connecting piece. Because the sealing element is connected with the shell through the connecting piece, when the sealing element is separated from the liquid injection port, the sealing element is not easy to fall off and lose.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

FIG. 1 is a schematic diagram of one implementation of a sealing device sealing a housing provided by an embodiment of the present application;

FIG. 2 is a schematic view of one implementation of a seal assembly partially disengaged from a housing provided by an embodiment of the present application;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2 as provided by an embodiment of the present application;

FIG. 4 is an enlarged view of a portion C of FIG. 3 according to an embodiment of the present disclosure;

FIG. 5 is a schematic cross-sectional view of a seal provided by an embodiment of the present application taken along line A-A of FIG. 2;

FIG. 6 is a schematic diagram of another implementation of a sealing device sealing a housing provided by an embodiment of the present application;

FIG. 7 is a schematic view of another implementation of a seal assembly partially disengaged from a housing provided by an embodiment of the present application;

FIG. 8 is a schematic diagram of one implementation of a battery provided by an embodiment of the present application;

fig. 9 is a schematic diagram of another implementation of a battery provided by an embodiment of the present application;

FIG. 10 is a cross-sectional view taken along line B-B of FIG. 8 according to an embodiment of the present application.

Detailed Description

In order to facilitate an understanding of the present application, the present application is described in more detail below with reference to the accompanying drawings and specific embodiments. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," "inner," "outer," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, in an implementation manner of a battery case 10 provided in the embodiment of the present application, the battery case 10 includes a case 1, a sealing device 2, a bracket 3, and a connecting shaft 4. The sealing device 2 is provided in the housing 1, and the sealing device 2 is used for sealing the housing 1. A bracket 3 and a connecting shaft 4 are provided to the housing 1, and the bracket 3 and the connecting shaft 4 are used to mount the sealing device 2.

It should be noted that the battery case 10 may not include the above-described bracket 3 and the connecting shaft 4, and the object of the present application may be achieved.

Referring to fig. 2 and 3, the housing 1 is provided with a housing cavity 11 and a liquid injection port 12 communicating with the housing cavity 11, wherein the housing cavity 11 is used for housing the battery cell, and the liquid injection port 12 is used for injecting and replacing electrolyte in the battery cell.

In some embodiments, the casing 1 is rigid and resistant to compression and deformation, so as to protect the cells received in the receiving cavities 11.

In some embodiments, the housing 1 is made of a metal material, such as a steel alloy, an aluminum alloy, an iron alloy, a copper alloy, and the like, and the material of the metal can be adjusted according to actual needs. The shape of the casing 1 can be a cuboid or other cylindrical structures.

In some embodiments, referring to FIG. 3, the area of the cross-section of the pouring outlet 12 decreases gradually from the surface of the casing 1 where the pouring outlet 12 is located toward the storage cavity 11 at a direction L1, wherein the "cross-section of the pouring outlet 12" is perpendicular to a direction L1 from the surface of the casing 1 where the pouring outlet 12 is located toward the storage cavity 11. That is, the cross-sectional area of the pouring outlet 12 is larger at the outer surface of the casing 1 and smaller at the inner surface of the casing 1, thereby facilitating the sealing of the pouring outlet 12 by the sealing means 2.

Referring to fig. 2, 3 and 4, the sealing device 2 includes a connecting member 21 and a sealing member 22, one end of the connecting member 21 is rotatably connected to the casing 1, the other end of the connecting member 21 is connected to the sealing member 22, the sealing member 22 can be inserted into the filling opening 12 by rotating the sealing member 22 to seal the filling opening 12, and further, the electrolyte in the battery cell accommodated in the casing 1 is not easy to leak at the filling opening 12. When the sealing member 22 is separated from the pouring port 12, the sealing member 22 can be rotated to separate the sealing member 22 from the pouring port 12, so that the electrolyte in the battery cell can be conveniently poured or replaced through the pouring port 12. When the sealing member 22 is detached from the pouring outlet 12, since the sealing member 22 is connected to the case 1 via the connecting member 21, the sealing member 22 is not easily detached and lost.

Referring to fig. 5, the sealing member 22 includes a sealing cap 221 and a sealing plug 222, the sealing cap 221 is connected to one end of the connecting member 21, one end of the sealing plug 222 is connected to the sealing cap 221, and the other end of the sealing plug 222 is used for being plugged into the pouring port 12 to seal the pouring port 12. Wherein the cross-sectional area of the sealing cap 221 is larger than the cross-sectional area of the sealing plug 222. Referring to fig. 3, the "cross section of the sealing cover 221" is perpendicular to the direction L2 from the other end of the sealing plug 222 to the sealing cover 221, and the "cross section of the sealing plug 222" is perpendicular to the direction L2 from the other end of the sealing plug 222 to the sealing cover 221.

It is understood that when the connecting member 21 is parallel to the surface of the casing 1 where the pouring outlet 12 is located, the direction L2 from the other end of the sealing plug 222 to the sealing cover 221 is parallel to the direction L1 from the surface of the casing 1 where the pouring outlet 12 is located toward the storage chamber 11.

In some embodiments, the sealing plug 222 is a rubber material.

It should be noted that, when the sealing plug 222 is inserted into the pouring outlet 12, the sealing cover 221 may be attached to the casing 1, or a gap may be formed between the sealing cover 221 and the casing 1. By arranging the sealing cover 221 and the sealing plug 222, the area of the cross section of the sealing cover 221 is larger than that of the cross section of the sealing plug 222, so that the sealing plug 222 can be conveniently inserted into the liquid injection port 12 to seal the liquid injection port 12, and when the sealing plug 222 needs to be pulled out of the liquid injection port 12, the sealing plug 222 can be pulled out through the sealing cover 221, and the sealing plug is very convenient.

In some embodiments, the sealing cover 221 and the case 1 are fixed by welding. It is understood that the sealing cover 221 is made of metal, and the housing 1 is made of metal. By fixing the sealing lid 221 to the casing 1, the sealing of the pouring outlet 12 by the sealing member 22 is enhanced. When the battery case 10 is moved or subjected to an external force, the sealing member 22 is not easily separated from the injection port 12, so that the electrolyte of the battery cell in the battery case 10 is not easily leaked.

Referring to fig. 5, the sealing plug 222 includes a first portion 2221 and a second portion 2222, the first portion 2221 is connected to the second portion 2222, and an end of the first portion 2221 remote from the second portion 2222 is connected to the sealing cover 221. In a direction L3 from the first portion 2221 to the second portion 2222, the area of the cross-section of the first portion 2221 gradually increases and the area of the cross-section of the second portion 2222 gradually decreases. Wherein a "cross-section of the first portion 2221" is perpendicular to a direction L3 of the first portion 2221 to the second portion 2222 and a "cross-section of the second portion 2222" is perpendicular to a direction L3 of the first portion 2221 to the second portion 2222.

Since the cross-sectional area of the first portion 2221 gradually increases and the cross-sectional area of the second portion 2222 gradually decreases in the direction L3 from the first portion 2221 to the second portion 2222, that is, the cross-sectional area of the end of the sealing plug 222 close to the sealing cover 221 is small, the cross-sectional area of the end of the sealing plug 222 away from the sealing cover 221 is small, and the cross-sectional area of the middle portion of the sealing plug 222 is large, wherein the middle portion of the sealing plug 222 is the portion where the first portion 2221 and the second portion 2222 are connected, that is, the sealing plug 222 is in a structure of being "small at both ends and large in the middle", the sealing plug 222 is easy to insert and can achieve good sealing of the liquid pouring port 12 when being inserted into the liquid pouring port 12.

In some embodiments, referring to fig. 3 and 5, the area of the cross section of the pouring outlet 12 decreases gradually from the surface of the case 1 where the pouring outlet 12 is located toward the direction L1 of the storage chamber 11, wherein the "cross section of the pouring outlet 12" is perpendicular to the direction L1 from the surface of the case 1 where the pouring outlet 12 is located toward the storage chamber 11, and the sealing plug 222 having the structure "with two small ends and a large middle" is more easily inserted when being inserted into the pouring outlet 12.

Referring to fig. 2, the bracket 3 includes a first supporting member 31 and a second supporting member 32, the first supporting member 31 and the second supporting member 32 are disposed opposite to each other on the housing 1, the connecting shaft 4 is connected to the first supporting member 31 and the second supporting member 32, and one end of the connecting member 21 of the sealing device 2 is connected to the connecting shaft 4.

Wherein, the connecting shaft 4 can rotate relative to the first supporting piece 31 and the second supporting piece 32, and one end of the connecting piece 21 is fixedly connected with the connecting shaft 4. Alternatively, one end of the connecting member 21 may rotate relative to the connecting shaft 4, the connecting shaft 4 is fixedly connected with the first supporting member 31, and the connecting shaft 4 is fixedly connected with the second supporting member 32. By rotating the connecting member 21, the sealing member 22 connected to the other end of the connecting member 21 can be rotated to the pouring outlet 12, and the sealing member 22 can be inserted into the pouring outlet 12 to seal the pouring outlet 12.

It is to be noted that, in this embodiment, the rotation center axis O1 of the link 21 is parallel to the surface of the casing 1 where the pouring outlet 12 is located.

In the embodiment of the present application, the battery case 10 includes a case 1 and a sealing device 2, the case 1 includes a receiving cavity 11 and a liquid injection port 12 communicating with the receiving cavity 11, the sealing device 2 includes a connecting member 21 and a sealing member 22, one end of the connecting member 21 is rotatably connected to the case 1, the other end of the connecting member 21 is connected to the sealing member 22, and the sealing member 22 can be inserted into the liquid injection port 12 by rotating the connecting member 21 to seal the liquid injection port 12. Since the sealing member 22 is connected to the case 1 via the connecting member 21, the sealing means 2 is not easily lost when the sealing member 22 is detached from the pouring outlet 12.

Referring to fig. 6 and 7, in another implementation manner of the battery case 10 according to the embodiment of the present application, the battery case 10 includes a case 1, a sealing device 2, and a rotation shaft 5. The sealing device 2 is provided in the housing 1, and the sealing device 2 is used for sealing the housing 1. A rotating shaft 5 is provided to the housing 1, and the rotating shaft 5 is used to mount the sealing device 2.

It should be noted that the battery case 10 may not include the rotation shaft 5, and the object of the present application may be achieved.

For the specific structure and function of the housing 1 and the sealing device 2, reference may be made to the above-mentioned embodiments, and the detailed description is omitted here.

The rotary shaft 5 is connected to one end of the connecting member 21, and the rotary shaft 5 is connected to the housing 1. Wherein, the rotating shaft 5 can rotate relative to the shell 1, and one end of the connecting piece 21 is fixedly connected with the rotating shaft 5. Alternatively, one end of the connecting member 21 may be rotatable with respect to the rotating shaft 5, and the rotating shaft 5 is fixedly connected to the housing 1. By rotating the connecting member 21, the connecting member 21 and the rotating shaft 5 are rotated relative to the casing 1, or one end of the connecting member 21 is rotated relative to the rotating shaft 5, so that the sealing member 22 connected to the other end of the connecting member 21 can be rotated to the pouring outlet 12, and the sealing member 22 can be inserted into the pouring outlet 12 to seal the pouring outlet 12.

It is to be noted that, in this embodiment, the rotation center axis O2 of the link 21 is perpendicular to the surface of the casing 1 where the pouring outlet 12 is located.

It will be appreciated that the connecting member 21 may be resilient so as to facilitate the insertion of the sealing member 22 connected to the connecting member 21 into the pouring outlet 12.

When one end of the connecting member 21 is rotatable with respect to the rotating shaft 5, in some embodiments, one end of the connecting member 21 is provided with a through hole 211, the rotating shaft 5 includes a shaft core 51 and a cap 52, one end of the shaft core 51 passes through the through hole 211 and then is connected to the housing 1, the shaft core 51 is rotatable in the through hole 211, the cap 52 is provided at the other end of the shaft core 51, the cross-sectional area of the cap 52 is larger than that of the through hole 211, and when one end of the connecting member 21 is rotated with respect to the rotating shaft 5, one end of the connecting member 21 is not easily disengaged from the rotating shaft 5. Wherein, the cross section of the cap 52 is perpendicular to the shaft core 51, and the cross section of the through hole 211 is perpendicular to the shaft core 51.

Referring to fig. 8 and 9, the battery 100 includes a battery case 10, a battery cell 20, and an insulating member 30, where the battery cell 20 is accommodated in an accommodating cavity 11 of a casing 1 of the battery case 10.

For the battery case 10, the specific structure and function of the battery case 10 can refer to the above embodiments, and are not described in detail herein. In addition to the structure of the battery case 10 in the above embodiment, referring to fig. 10, the casing 1 of the battery case 10 is further provided with an opening 13 communicating with the receiving cavity 11, and the opening 13 is used for electrically connecting the battery cell 20 in the battery case 10 with an external device. The opening 13 may be provided on the same surface of the case 1 as the pouring outlet 12, or may be provided on a different surface of the case 1 from the pouring outlet 12. Wherein, the shell 1 is made of metal.

Referring to fig. 10, the battery cell 20 includes an electrode assembly 201, an electrolyte 202, a first pole 203, and a second pole 204 with respect to the battery cell 20 and the insulator 30. The electrolyte 202 is filled in the housing cavity 11 of the case 1, and the electrolyte 202 infiltrates the electrode assembly 201. One end of the first pole 203 is connected to the electrode assembly 201, and the other end of the first pole 203 is connected to the inner surface of the case 1. One end of the second pole 204 is connected to the electrode assembly 201, and the other end of the second pole 204 extends to the opening 13. The insulating member 30 is disposed in the opening 13, and the insulating member 30 covers the other end of the second pole 204. The insulator 30 serves to insulate the other end of the first pole 203 from the other end of the second pole 204. The insulator 30 also serves to seal the opening 13.

In some embodiments, the first pole 203 is a negative pole of the battery 100 and the second pole 204 is a positive pole of the battery 100.

The embodiment of the present application further provides an embodiment of an electrical device, which includes the battery 100. For the specific structure and function of the battery 100, reference may be made to the above embodiments, and details are not repeated here.

It should be noted that the description of the present application and the accompanying drawings set forth preferred embodiments of the present application, however, the present application may be embodied in many different forms and is not limited to the embodiments described in the present application, which are not intended as additional limitations to the present application, but are provided for the purpose of providing a more thorough understanding of the present disclosure. Moreover, the above-mentioned technical features are combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope described in the present specification; further, modifications and variations may occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the scope of the appended claims.

Claims

1. A battery shell comprises a shell body, the shell body is provided with a containing cavity and a liquid injection port communicated with the containing cavity, and is characterized in that,

the battery case further comprises a sealing device, the sealing device comprises a connecting piece and a sealing piece, one end of the connecting piece is rotatably connected with the case, the other end of the connecting piece is connected with the sealing piece, and the sealing piece is inserted into the liquid injection port to seal the liquid injection port by rotating the connecting piece.

2. The battery case according to claim 1, wherein the battery case further comprises a bracket and a connecting shaft, the bracket comprises a first supporting member and a second supporting member, the first supporting member and the second supporting member are oppositely disposed to the case, the connecting shaft is connected to the first supporting member and the second supporting member, respectively, and one end of the connecting member is connected to the connecting shaft, wherein the connecting shaft is rotatable with respect to the first supporting member and the second supporting member, or one end of the connecting member is rotatable with respect to the connecting shaft.

3. The battery case according to claim 1, further comprising a rotation shaft connected to one end of the connection member, the rotation shaft being connected to the case, the rotation shaft being rotatable with respect to the case, or one end of the connection member being rotatable with respect to the rotation shaft.

4. The battery case according to claim 3, wherein a through hole is formed at one end of the connecting member, the rotation shaft includes a shaft core and a cap, one end of the shaft core is connected to the case after passing through the through hole, the shaft core is rotatable in the through hole, the cap is disposed at the other end of the shaft core, and the cross-sectional area of the cap is larger than that of the through hole.

5. The battery case according to any one of claims 1 to 4,

the sealing element comprises a sealing cover and a sealing plug, the sealing cover is connected with one end of the connecting element, one end of the sealing plug is connected with the sealing cover, and the other end of the sealing plug is used for being inserted into the liquid injection port so as to seal the liquid injection port;

the area of the cross section of the sealing cover is larger than that of the cross section of the sealing plug, and when the sealing plug is inserted into the liquid injection port, the sealing cover is attached to the shell.

6. The battery case according to claim 5, wherein the sealing cover and the case are welded and fixed.

7. The battery case according to claim 5, wherein the area of the cross section of the liquid inlet is gradually reduced from the surface of the case where the liquid inlet is located toward the storage chamber.

8. The battery case according to claim 7,

the sealing plug comprises a first part and a second part, the first part is connected with the second part, and one end of the first part, which is far away from the second part, is connected with the sealing cover;

in the direction from the first portion to the second portion, the area of the cross section of the first portion gradually increases, and the area of the cross section of the second portion gradually decreases.

9. A battery, comprising a battery core and the battery case according to any one of claims 1 to 8, wherein the battery core is accommodated in the accommodating cavity.

10. An electric device comprising the battery of claim 9.