CN220456520U

CN220456520U - Battery shell, battery and electronic equipment

Info

Publication number: CN220456520U
Application number: CN202321784773.4U
Authority: CN
Inventors: 陈海峰
Original assignee: Suzhou Zhongke Ruilong Technology Co ltd
Current assignee: Suzhou Zhongke Ruilong Technology Co ltd
Priority date: 2023-07-07
Filing date: 2023-07-07
Publication date: 2024-02-06
Anticipated expiration: 2033-07-07

Abstract

The utility model discloses a battery shell, a battery and electronic equipment, wherein the battery shell comprises a bottom plate, a peripheral plate, a cover plate and an electrode assembly, the bottom plate is provided with a first plate body, a second plate body and a connecting plate body connected between the first plate body and the second plate body; the peripheral side plate is arranged on the periphery of the bottom plate in a surrounding way and is connected with the bottom plate to form a containing cavity with one end open; the cover plate is arranged opposite to the first plate body and the second plate body and seals the accommodating cavity; the electrode assembly comprises a positive electrode assembly, at least part of the positive electrode assembly is arranged on the inner side of the second plate body, the positive electrode assembly comprises a positive electrode column and an inner insulating piece, and the positive electrode column and the cover plate are separated by the inner insulating piece. The internal insulation piece separates the positive pole from the cover plate, so that the short circuit phenomenon caused by the fact that the positive pole touches the cover plate is avoided, the second plate body and the cover plate can be insulated at the same time, and meanwhile, the electrode assembly is arranged on the second plate body, so that the installation of the electrode assembly is facilitated.

Description

Battery shell, battery and electronic equipment

Technical Field

The present utility model relates to the field of battery packaging technology, and in particular, to a battery case, a battery, and an electronic device.

Background

The battery technology field includes a lot of technical branches, wherein the battery electrode packaging technology is one of the main research projects of the person skilled in the art.

The prior art provides a packaging case and a battery (CN 207504023U), wherein a positive electrode post is riveted on a first side wall, a negative electrode post tab is welded on the first side wall, and a nail cover is formed at a liquid injection port and welded on the outer surface of the first side wall.

The side wall of the battery shell is only 3.5 mm-8.0 mm in height, the rest side wall is blocked on the periphery, and in the actual packaging process, the operations of perforating, riveting, welding and the like are very inconvenient to complete on the side wall, so that extremely high requirements are provided for the packaging process, and the production efficiency is greatly influenced.

As known to the inventor, as shown in fig. 1, the bottom plate 8 of the battery case may be configured in a stepped structure, and the positive electrode assembly 82 is mounted on the plate 80 with more sides, thereby facilitating the mounting of the electrode assembly 82, reducing the requirements on the packaging process, and greatly improving the production efficiency and the product yield. However, since the distance between the plate 80 and the cover 81 is short, and at least a part of the positive electrode assembly is disposed inside the plate 80, one end of the positive electrode assembly, which is disposed inside the plate 80, is easily contacted with the cover 81, thereby causing a short circuit phenomenon, which adversely affects the normal operation of the battery.

Accordingly, there is a need for an improvement over the prior art to overcome the deficiencies described in the prior art.

Disclosure of Invention

The utility model aims to provide a battery shell and a battery, which prevent a positive electrode component from touching a cover plate and solve the problem of short circuit.

In order to solve the above technical problems, the present utility model provides a battery case, comprising:

the bottom plate is provided with a first plate body, a second plate body and a connecting plate body connected between the first plate body and the second plate body;

the peripheral side plate is arranged on the periphery of the bottom plate in a surrounding way and is connected with the bottom plate to form a containing cavity with one end open;

a cover plate which is arranged opposite to the first plate body and the second plate body and seals the accommodating cavity, and,

the electrode assembly comprises a positive electrode assembly, at least part of the positive electrode assembly is arranged on the inner side of the second plate body, the positive electrode assembly comprises a positive electrode column and an inner insulating part, and the inner insulating part separates the positive electrode column from the cover plate.

Further, the positive electrode assembly further includes an outer insulator separating the positive electrode post from the second plate body.

Further, the inner insulator separates the positive electrode post from the second plate body; the inner insulator includes first and second oppositely disposed arms, and the positive post is at least partially located between the first and second arms.

Further, the first arm part is attached to the second plate body, and the second arm part is attached to the cover plate; the positive pole post comprises a post body and a second sheet body connected to the end part of the post body, the second sheet body is located between the first arm part and the second arm part, and the post body penetrates through the second plate body and extends to the outside of the second plate body.

Further, the positive electrode assembly further comprises a conductive sheet, the conductive sheet is arranged outside the cylinder in a surrounding mode, and the conductive sheet is located between the first arm portion and the second arm portion.

Further, the outer insulator is arranged outside the cylinder in a surrounding mode and is partially embedded in the first arm part; the external insulation piece comprises a ring body and a sleeve part connected with the ring body, the sleeve part is sleeved outside the cylinder and penetrates through the second plate body, the positive pole comprises a first sheet body, the first sheet body and the second sheet body are respectively located at two ends of the cylinder, a limiting groove for accommodating the first sheet body is further formed in the ring body, and the first sheet body is exposed outside the second plate body.

Further, a groove is formed at the joint of the first arm part and the second arm part, and the inner insulating part is made of a high polymer material; the first arm part and the second arm part are folded through the groove to be arranged oppositely.

Further, the inner insulating member is in a free state, and an included angle between the first arm portion and the second arm portion is 0-180 degrees or 0-90 degrees.

Further, the groove includes a groove bottom surface and a connecting surface connected between the groove bottom surface and the first arm portion or the second arm portion; the bottom of the groove is arc-shaped, rectangular, trapezoid with chamfer or rectangle with chamfer, and the connecting surface is arc-shaped, plane or inclined plane.

Further, the free end of the peripheral side plate extends outwards to form a flange edge, the cover plate is connected with the flange edge, and the distance between the first plate body and the cover plate is greater than the distance between the second plate body and the cover plate.

Further, the accommodating chambers include a first accommodating chamber formed between the cover plate and the first plate body and a second accommodating chamber formed between the cover plate and the second plate body, and the first accommodating chamber and the second accommodating chamber are communicated with each other.

Further, the electrode assembly includes a negative electrode assembly electrically connected to the second plate, and the negative electrode assembly includes a connection tab connected to the second plate.

Further, the second plate body is a single independent component or is composed of a plurality of components.

Further, the second plate body comprises a first portion and a second portion, the first portion is connected with the second portion through a connecting portion, the first portion and the second portion form a step structure, and the positive electrode component and the negative electrode component are respectively arranged on the first portion and the second portion.

On the other hand, the utility model also provides a battery which comprises the battery shell and an electric core arranged in the first accommodating cavity of the battery shell.

Compared with the prior art, the utility model has the following advantages:

the battery shell is characterized in that the cover plate is arranged opposite to the second plate body, at least part of the positive electrode component is arranged on the inner side of the second plate body, the positive electrode component comprises a positive electrode column and an inner insulating part, the positive electrode column and the cover plate are separated by the inner insulating part, the short circuit phenomenon caused by the fact that the positive electrode column touches the cover plate is avoided, and the second plate body and the cover plate can be insulated at the same time.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present utility model, and are not particularly limited. Those skilled in the art with access to the teachings of the present utility model can select a variety of possible shapes and scale sizes to practice the present utility model as the case may be. In the drawings:

fig. 1 is a schematic view showing a structure in which a bottom plate of a battery case is provided in a stepped shape in the prior art;

fig. 2 is a schematic view of the structure of a battery case according to an embodiment of the present utility model;

fig. 3 is a cross-sectional view of a battery case according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is an exploded view of a battery case according to an embodiment of the present utility model;

FIG. 6 is an exploded view of a positive electrode assembly according to one embodiment of the present utility model;

FIG. 7 is a schematic view of the structure of an inner insulator according to one embodiment of the present utility model;

FIG. 8 is a schematic view of another embodiment of an inner insulator of the present utility model;

FIG. 9 is a schematic view of another embodiment of an inner insulator of the present utility model;

FIG. 10 is a schematic view of another embodiment of an inner insulator of the present utility model;

FIG. 11 is a schematic view of another embodiment of an inner insulator of the present utility model;

FIG. 12 is a schematic view of another embodiment of an inner insulator of the present utility model;

FIG. 13 is a schematic view of another embodiment of an inner insulator of the present utility model;

FIG. 14 is a schematic view of another embodiment of an inner insulator of the present utility model;

FIG. 15 is a schematic view of the structure of the bottom plate and the peripheral side plate in one embodiment of the present utility model;

FIG. 16 is a schematic view of another embodiment of the bottom and peripheral side plates of the present utility model;

FIG. 17 is a cross-sectional view of a battery according to one embodiment of the present utility model;

fig. 18 is an exploded view of a battery according to an embodiment of the present utility model.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. 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, shall fall within the scope of the utility model.

It will be understood that when an element is referred to as being "disposed on" 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 also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

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 utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 2 to 6, the present utility model discloses a battery case including a bottom plate 1, a peripheral side plate 2, a cap plate 3, and an electrode assembly.

The base plate 1 has a first plate body 101, a second plate body 102, and a connection plate body 103 connected between the first plate body 101 and the second plate body 102. In this embodiment, a step structure is formed between the first plate 101 and the second plate 102.

The peripheral plate 2 is arranged around the bottom plate 1 and connected with the bottom plate 1 to form a containing cavity with one end opening 201.

The cover plate 3 is disposed opposite to the first plate body 101 and the second plate body 102, and seals the accommodating cavity, so that the accommodating cavity forms a closed cavity, and it can be understood that the cover plate 3 is located at an opposite side of the bottom plate 1.

The electrode assembly includes a positive electrode assembly 4, at least a portion of the positive electrode assembly 4 is disposed inside the second plate 102, the positive electrode assembly 4 includes a positive electrode post 401 and an inner insulating member 403, and the inner insulating member 403 separates the positive electrode post 401 from the cap plate 3. In this embodiment, the positive electrode post 401 and the inner insulating member 403 are fixed by caulking, and the position of the inner insulating member 403 is effectively fixed by the positive electrode post 401.

At least part of the cover plate 3 is arranged opposite to the second plate body 102, and the internal insulation part 403 separates the positive pole 401 from the cover plate 3, so that the short circuit phenomenon caused by the fact that the positive pole 401 touches the cover plate 3 is avoided, and the second plate body and the cover plate can be insulated at the same time; meanwhile, the electrode assembly is arranged on the second plate body 102, so that the installation of the electrode assembly is facilitated, the requirement on a packaging process is reduced, and the production efficiency and the product qualification rate are greatly improved.

As a preferred embodiment, as shown in fig. 4, the positive electrode assembly further includes an outer insulating member 402, most of the outer insulating member 402 is located at the outer side of the second plate body 102, the inner insulating member 403 is located at the inner side of the second plate body 102, the outer insulating member 402 separates the positive electrode column 401 from the second plate body 102, the inner insulating member 403 separates the positive electrode column 401 from the second plate body 102 and the cover plate 3, the positive electrode column 401 and the second plate body 102 are in insulating connection through the cooperation of the outer insulating member 402 and the inner insulating member 403, and meanwhile, the positive electrode column 401 and the cover plate 3 are separated through the inner insulating member 403, so that a short circuit phenomenon caused by the positive electrode column 401 touching the cover plate 3 is avoided.

As a preferred embodiment, as shown in fig. 6 to 14, the inner insulating member 403 includes a first arm portion 4031 and a second arm portion 4032 that are disposed opposite to each other, as shown in fig. 4, the positive electrode post 401 is at least partially located between the first arm portion 4031 and the second arm portion 4032, and a groove 4033 is formed at a junction between the first arm portion 4031 and the second arm portion 4032. In this embodiment, the inner insulating member 403 is made of a polymer material, preferably a silica gel or plastic material, and has good insulation and elasticity. The first arm portion 4031 and the second arm portion 4032 can be folded by the groove 4033 to be disposed opposite to each other by the elasticity of the inner insulating member 403 itself.

As shown in fig. 7 to 10, preferably, the inner insulator 403 has an angle of 0 to 180 ° between the first arm portion 4031 and the second arm portion 4032 in the free state; as shown in fig. 11 to 14, it is more preferable that the inner insulator 403 has an angle of 0 to 90 ° between the first arm portion 4031 and the second arm portion 4032 in the free state. As shown in fig. 4 to 6, in the use state of the inner insulator 403, the first arm portion 4031 and the second arm portion 4032 are folded by the groove 4033 to be disposed opposite to each other up and down. The first arm portion 4031 or the second arm portion 4032 can effectively cover the space between the positive electrode post 401 and the cover plate 3, preventing the positive electrode post 401 from touching the cover plate 3.

The groove 4033 includes a groove bottom surface 4034 and a connecting surface 4035 connected between the groove bottom surface 4034 and the first arm portion 4031 or the second arm portion 4032, wherein the groove bottom surface 4034 is arc-shaped, rectangular, trapezoid-shaped with a chamfer or rectangle-shaped with a chamfer, and the connecting surface 4035 is arc-shaped, plane or inclined surface.

Further, as shown in fig. 7 to 10, the inner insulator 403 has an angle of 180 ° between the first arm portion 4031 and the second arm portion 4032 in the free state. In some embodiments, as shown in fig. 7, the cross-sectional shape of the groove bottom surface 4034 is an arc, and the connecting surface 4035 is an arc; in other embodiments, as shown in fig. 8, the cross-sectional shape of the groove bottom surface 4034 is rectangular, and the connecting surface 4035 is an arc surface; in other embodiments, as shown in fig. 9, the cross-sectional shape of the groove bottom surface 4034 is trapezoid with a chamfer, and the connecting surface 4035 is an arc surface; in other embodiments, as shown in fig. 10, the cross-sectional shape of the groove bottom surface 4034 is rectangular with chamfers and the connecting surface 4035 is planar.

Further, as shown in fig. 11 to 14, the inner insulating member 403 has an angle of 90 ° between the first arm portion 4031 and the second arm portion 4032 in the free state; in some embodiments, as shown in fig. 11, the cross-sectional shape of the groove bottom surface 4034 is an arc, and the connecting surface 4035 is an arc; in other embodiments, as shown in fig. 12, the cross-sectional shape of the groove bottom surface 4034 is rectangular, and the connecting surface 4035 is an arc surface; in other embodiments, as shown in fig. 13, the cross-sectional shape of the groove bottom surface 4034 is trapezoid with a chamfer, and the connecting surface 4035 is beveled; in other embodiments, as shown in fig. 14, the cross-sectional shape of the groove bottom surface 4034 is rectangular with chamfers and the connecting surface 4035 is beveled.

In this embodiment, the cross-sectional shape of the groove bottom 4034 is not limited, the first arm 4031 and the second arm 4032 are easier to fold due to the structure of the groove 4033, and a gap is formed at the folded portion, so that the connection ends of the folded first arm 4031 and second arm 4032 are prevented from abutting against each other, a space is left between the two, and the positive electrode column 401 is convenient to install and position.

The side walls 4036 of the free ends of the first arm 4031 and the second arm 4032 are cambered surfaces, inclined surfaces or a combination of cambered surfaces and inclined surfaces, so that the folded free ends of the first arm 4031 and the second arm 4032 can be further prevented from being mutually abutted, and the design is reasonable.

The bottom plate 1 and the cover plate 3 are made of metal or alloy materials, and the alloy materials are preferably stainless steel. Preferably, in this embodiment, the base plate 1 and the cover plate 3 are made of conductive stainless steel. As shown in fig. 2, the base plate 1 includes a first plate body 101, a second plate body 102, and a connection plate body 103 connected between the first plate body 101 and the second plate body 102, and the first plate body 101 and the second plate body 102 are not limited in shape, and may be rectangular, L-shaped, T-shaped, circular, i-shaped, or the like. In this embodiment, as shown in fig. 2, the free ends of the first plate 101 and the second plate 102 are provided with notches 104, which is convenient for subsequent assembly and fixation. The first plate 101 and the second plate 102 are not at the same horizontal position, preferably, the first plate 101 and the second plate 102 are arranged in parallel and have a stepped structure, and the second plate 12 is arranged near the opening 201, and it is understood that, as shown in fig. 3 and 11, the distance H1 between the first plate 101 and the cover plate 3 is greater than the distance H2 between the second plate 102 and the cover plate 3. A first accommodating cavity 202 for accommodating the battery cell is formed between the first plate body 101 and the cover plate 3, a second accommodating cavity 203 for accommodating the electrode assembly is formed between the second plate body 102 and the cover plate 3, and the first accommodating cavity 202 and the second accommodating cavity 203 are mutually communicated to form an accommodating cavity.

Further, as shown in fig. 4, 5 and 15, in order to facilitate the installation of the cover plate 3, the free end of the peripheral side plate 2 is extended outwards to form a flange 204, and the flange 204 is preferably parallel to the first plate 101 or the second plate 102 and extends horizontally away from the accommodating cavity. The cover plate 3 is connected with the flange edge 204 by adopting a mode of dispensing after welding, so that the accommodating cavity is sealed.

As shown in fig. 4, the positive electrode assembly 4 is disposed on the second plate 102, and the positive electrode assembly 4 is partially disposed in the second accommodating cavity 203 and partially exposed outside the battery case. The positive electrode assembly 4 includes a positive electrode column 401, an outer insulating member 402, an inner insulating member 403, and a conductive sheet 404, and in this embodiment, the positive electrode column 401 and the conductive sheet 404 are made of an aluminum material. The positive electrode post 401 includes a post 4011, a first sheet 4012 and a second sheet 4013 connected to two ends of the post 4011, the second sheet 4013 is located between the first arm 4031 and the second arm 4032, and the post 4011 passes through the second sheet 4013 and extends to the outside of the second sheet 4013. In this embodiment, as shown in fig. 6, the cross-section of the cylinder 4011 is circular, the cross-section of the first sheet 4012 is rectangular, the cross-section of the second sheet 4013 is circular, the size of the first sheet 4012 is larger than the second sheet 4013, and the diameter of the second sheet 4013 is larger than the diameter of the cylinder 4011. The second plate 102 is provided with a first avoidance hole 1021 corresponding to the cylinder 4011, the outer insulating member 402 is provided with a second avoidance hole 4021 corresponding to the cylinder 4011, the inner insulating member 403 is provided with a third avoidance hole 4037 corresponding to the cylinder 4011, the conductive sheet 404 is provided with a fourth avoidance hole 4041 corresponding to the cylinder 4011, the cylinder 4011 sequentially passes through the second avoidance hole 4021, the first avoidance hole 1021, the third avoidance hole 4037 and the fourth avoidance hole 4041, the first sheet 4012 is arranged outside the second avoidance hole 4021 and far away from one end of the second accommodating cavity 203 (i.e. exposed outside the battery case), and the second sheet 4013 is arranged outside the fourth avoidance hole 4041 and near one end of the second accommodating cavity 203 (i.e. arranged in the second accommodating cavity 203).

In this embodiment, as shown in fig. 4 and 6, the external insulating member 402 includes a ring body 4022 provided with a second avoidance hole 4021 and a sleeve portion 4023 extending along an axis of the second avoidance hole 4021, the sleeve portion 4023 is arranged on the second plate 102 in a penetrating manner, a limiting groove 4024 for accommodating the first plate 4012 is further formed in the ring body 4022, the first plate 4012 is exposed out of the second plate 102, the limiting groove 4024 is communicated with the second avoidance hole 4021, the ring body 4022 and the sleeve portion 4023 are arranged outside the cylinder 4011 in a surrounding manner through the second avoidance hole 4021, and the contact between the positive pole 401 and the outer wall of the second plate 102 and the contact between the positive pole 401 and the inner wall of the first avoidance hole 4021 are isolated through the external insulating member 402.

The third avoidance hole 4037 is formed in the first arm portion 4031 or the second arm portion 4032 of the inner insulating member 403, in this embodiment, the third avoidance hole 4037 is formed in the first arm portion 4031 as an example, the sleeve portion 4023 of the outer insulating member 402 passes through the first avoidance hole 4021 of the second plate 102 and is partially embedded in the third avoidance hole 4037 of the first arm portion 4031, and of course, the sleeve portion 4023 may not be embedded in the first arm portion 4031, and may directly abut against the outer side of the first arm portion 4031 after passing through the first avoidance hole 1021. The first arm 4031 is disposed around the outside of the column 4011 through the third avoiding hole 4037, and the first arm 4031 and the positive electrode post 401 are fixed by riveting, so that the first arm 4031 and the second plate 102 are fixedly attached to each other, and the contact between the positive electrode post 401 and the inner wall of the second plate 102 is isolated by the first arm 4031 of the inner insulator 403. The conductive sheet 404 is arranged outside the column 4011 in a surrounding manner through the fourth avoiding hole 4041, the conductive sheet 404 is positioned between the first arm portion 4031 and the second arm portion 4032, and the second sheet body 4013 of the positive pole 401 is positioned outside the conductive sheet 404, because the first arm portion 4031 and the positive pole 401 are fixed in a riveting manner, the second arm portion 4032 can be directly elastically abutted on the inner side of the cover plate 3, the fixing procedure of the second arm portion 4032 is omitted, the second arm portion 4032 can be attached to the cover plate 3 in an adhesive manner, and the second sheet body 4013 of the positive pole 401 is isolated from the cover plate 3 by the second arm portion 4032 of the inner insulating member 403, so that short circuit is prevented. When the battery case is in use, the battery cells are electrically connected to the conductive sheet 404, and the length and area of the conductive sheet 404 may be optionally increased to facilitate connection with the battery cells.

As shown in fig. 2 and 5, the electrode assembly further includes a negative electrode assembly 5 electrically connected to the second plate 102, in this embodiment, the negative electrode assembly 5 includes a connecting piece connected to the second plate 102, the connecting piece is made of nickel material, the negative electrode assembly 5 is disposed outside the second plate 102, and when the battery case is used, the battery core only needs to be connected to the second plate 102 to be electrically connected to the negative electrode assembly 5.

In this embodiment, as shown in fig. 5, a liquid injection hole 1022 for allowing electrolyte (not shown) to enter the accommodating cavity is further provided on the second plate 102, and the liquid injection hole 1022 is provided with a liquid blocking plug 6 in interference fit, and the liquid blocking plug 6 is made of stainless steel. As shown in fig. 2 and 5, the liquid injection hole 1022 is provided on the second plate 102 and located at a side close to the negative electrode assembly 5, and the electrolyte is conveniently filled into the accommodating cavity through the liquid injection hole 1022.

Further, the second plate 102 is a single independent component or is composed of multiple components. In some embodiments, as shown in fig. 2 and 5, the second plate 102 is a single, independent component, and in other embodiments, the second plate 102 is composed of multiple components. As shown in fig. 16, in other embodiments, the second plate 102 includes a first portion 1023 and a second portion 1024, where the first portion 1023 and the second portion 1024 are connected by a connection 1025, and the second portion 1024 is higher than the first portion 1023, and the first portion 1023 and the second portion 1024 form a stepped structure. With this configuration, positive electrode assembly 4 is disposed in first portion 1023, and negative electrode assembly 5 and injection hole 1022 are disposed in second portion 1024. It can be appreciated that the first portion 1021 and the second portion 1022 form a stepped structure, so that when the subsequent electrode assembly is welded by laser, the point is conveniently taken after the laser light source is emitted, and meanwhile, the subsequent assembly is convenient. In addition, the first portion 1023 may be disposed higher than the second portion 1024.

On the other hand, as shown in fig. 17 and 18, the present application also proposes a battery including the battery case structured as described above and the battery cell 7 disposed in the first accommodation chamber 202 of the battery case, the battery cell 7 being electrically connected to the conductive sheet 404 of the positive electrode assembly 4. Meanwhile, the containing cavity of the battery shell can be filled with electrolyte, and the positive electrode component 4 and the negative electrode component 5 play a role in conducting ions through the electrolyte, so that the battery can obtain the advantages of high voltage, high specific energy and the like.

As a preferred embodiment, the shape of the battery cell 7 corresponds to the cross-sectional shape of the first receiving cavity 202.

It is to be understood that the above description is intended to be illustrative, and not restrictive. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but instead should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are incorporated herein by reference for the purpose of completeness. The omission of any aspect of the subject matter disclosed herein in the preceding claims is not intended to forego this column content nor should the applicant not consider the subject matter to be part of the disclosed subject matter.

Claims

1. A battery case, comprising:

2. The battery housing of claim 1, wherein the positive electrode assembly further comprises an outer insulator separating the positive electrode post from the second plate body.

3. The battery case according to claim 2, wherein the inner insulator separates the positive electrode post from the second plate body; the inner insulator includes first and second oppositely disposed arms, and the positive post is at least partially located between the first and second arms.

4. The battery case according to claim 3, wherein the first arm portion is attached to the second plate body, and the second arm portion is attached to the cover plate; the positive pole post comprises a post body and a second sheet body connected to the end part of the post body, the second sheet body is located between the first arm part and the second arm part, and the post body penetrates through the second plate body and extends to the outside of the second plate body.

5. The battery housing of claim 4, wherein the positive electrode assembly further comprises a conductive tab disposed around the exterior of the post, the conductive tab being located between the first arm and the second arm.

6. The battery housing of claim 4, wherein the outer insulator is disposed around the exterior of the post and partially embedded within the first arm; the external insulation piece comprises a ring body and a sleeve part connected with the ring body, the sleeve part is sleeved outside the cylinder and penetrates through the second plate body, the positive pole comprises a first sheet body, the first sheet body and the second sheet body are respectively located at two ends of the cylinder, a limiting groove for accommodating the first sheet body is further formed in the ring body, and the first sheet body is exposed outside the second plate body.

7. The battery case according to claim 3, wherein a groove is formed at a junction of the first arm portion and the second arm portion, and the inner insulating member is made of a polymer material; the first arm part and the second arm part are folded through the groove to be arranged oppositely.

8. The battery case according to claim 7, wherein the inner insulator is in a free state, and an angle between the first arm portion and the second arm portion is 0 to 180 ° or 0 to 90 °.

9. The battery case according to claim 8, wherein the groove includes a groove bottom surface and a connecting surface connected between the groove bottom surface and the first arm portion or the second arm portion; the bottom of the groove is arc-shaped, rectangular, trapezoid with chamfer or rectangle with chamfer, and the connecting surface is arc-shaped, plane or inclined plane.

10. The battery case according to claim 1, wherein the free end of the peripheral side plate extends outward with a flange edge, the cover plate is connected to the flange edge, and a distance between the first plate body and the cover plate is greater than a distance between the second plate body and the cover plate.

11. The battery case according to claim 10, wherein the receiving chamber includes a first receiving chamber formed between the cover plate and the first plate body and a second receiving chamber formed between the cover plate and the second plate body, the first receiving chamber and the second receiving chamber being in communication with each other.

12. The battery housing of any one of claims 1-11, wherein the electrode assembly comprises a negative electrode assembly conductively coupled to the second plate, the negative electrode assembly comprising a connecting tab coupled to the second plate.

13. The battery housing of claim 12, wherein the second plate is a single independent component or is composed of multiple components.

14. The battery case according to claim 13, wherein the second plate body includes a first portion and a second portion, the first portion and the second portion are connected by a connection portion, the first portion and the second portion form a stepped structure, and the positive electrode assembly and the negative electrode assembly are disposed on the first portion and the second portion, respectively.

15. A battery comprising a battery housing according to any one of claims 1-14 and a cell disposed within the first receiving cavity of the battery housing.