Battery housing, battery, and electronic device

Abstract

A battery housing, a battery, and an electronic device. The battery housing comprises a bottom plate, a peripheral side plate, and a cover plate, wherein the peripheral side plate comprises at least two side plates, and two adjacent side plates are connected to one another; the peripheral side plate is annular in shape and open at both ends, and the peripheral side plate is connected to the bottom plate to form an accommodating cavity which is open at one end; the cover plate is disposed opposite to the bottom plate, and seals the accommodating cavity. The peripheral side plate has a split structure and does not require stretching to be formed; thus, the problems of thinning and corner cracking are not prone to occur, processing is more convenient, the riveting and welding of a positive electrode assembly and a negative electrode assembly are facilitated, and assembly is more convenient.

Description

Battery housing, battery and electronic equipment Technical Field

[0001] The present invention relates to the technical field of battery packaging, and in particular to a battery housing, a battery and an electronic device. Background Art

[0002] The field of battery technology includes many technical branches, among which battery electrode packaging technology is one of the main research projects currently being conducted by those skilled in the art.

[0003] Some batteries use alloys as their battery shells. Alloys have strong hardness and ductility, and their thin thickness eliminates the need for wide sealing edges and folding edges, reducing the battery's volume and thereby increasing its volumetric energy density. For example, the prior art provides a battery shell and battery (CN218334016U). The shell is tubular, with its two ends sealed by connecting a first cover plate and a second cover plate. The connection points between the shell and the first and second cover plates do not form large rounded corners, thereby increasing the volume inside the battery shell. The space inside the battery shell is more regular in shape, allowing the battery cells to fully occupy the internal space, thereby improving the space utilization of the battery shell, which is conducive to increasing the capacity of the battery and improving its energy density.

[0004] However, due to its integrated tubular shell structure, the shell is still prone to thinning and cracking during the stretching process, which is not conducive to improving the yield rate and may pose hidden dangers, affecting the quality and service life of the battery.

[0005] Therefore, it is necessary to improve the prior art to overcome the above defects.

[0006] Summary of the Invention

[0007] The object of the present invention is to provide a battery housing and a battery, which can prevent the problems of thinning and corner cracking during the stretching forming process.

[0008] In a first aspect, in order to solve the above technical problems, the present invention provides a battery housing, comprising:

[0009] base plate;

[0010] A peripheral side plate, comprising at least two side plates, two adjacent side plates being connected, the peripheral side plates being in a ring shape with both ends open, and the peripheral side plates being connected to the bottom plate to form a receiving cavity with one end open; and

[0011] The cover plate is arranged opposite to the bottom plate and seals the accommodating cavity.

[0012] Furthermore, the peripheral side plate includes a first side plate and a second side plate, the two ends of the first side plate are respectively provided with a first step plate facing outward, the two ends of the second side plate are respectively provided with a second step plate facing inward, and the first step plate is fitted and connected to the second step plate.

[0013] Furthermore, the thickness of the first step plate is smaller than the thickness of the first side plate to form a first step groove, the thickness of the second step plate is smaller than the thickness of the second side plate to form a second step groove, the first step plate is arranged in the second step groove, and the second step plate is arranged in the first step groove.

[0014] Furthermore, the width of the first step groove is the same as the width of the second step plate, the width of the second step groove is the same as the width of the first step plate, and the sum of the thicknesses of the first step plate and the second step plate is the same as the thickness of the first side plate and the second side plate.

[0015] Furthermore, the thickness of the first side plate and the second side plate ranges from 0.03 to 0.4 mm, and the thickness of the first step plate and the second step plate ranges from 0.02 to 0.3 mm.

[0016] Furthermore, the first side panel is a bent panel, and the second side panel is a bent panel or a flat panel.

[0017] Furthermore, the cross-sectional shape of the accommodating cavity is L-shaped or rectangular; the cross-sectional shapes of the bottom plate and the cover plate correspond to the cross-sectional shape of the accommodating cavity.

[0018] Furthermore, an annular groove is provided at an end portion of an opening of the peripheral side plate, and the bottom plate or the cover plate is fitted into the annular groove and fits in contact with the bottom surface of the annular groove; or,

[0019] The two open ends of the peripheral side plate are both provided with an annular groove, and the bottom plate and the cover plate are respectively fitted in the two annular grooves and fit with the bottom surfaces of the corresponding annular grooves.

[0020] Furthermore, it also includes a positive electrode assembly, at least part of which is arranged on the inner side of the second side plate.

[0021] Furthermore, the positive electrode assembly includes a positive electrode column, an outer insulating member, an inner insulating member and a conductive sheet. The positive electrode column includes a column and a first sheet and a second sheet connected to the two ends of the column. The column passes through the second side plate and extends to the outside of the second side plate. The outer insulating member, the inner insulating member and the conductive sheet are all arranged on the outside of the column, and the second sheet is located on the outside of the conductive sheet.

[0022] Furthermore, the outer insulating member includes a ring body and a sleeve connected to the ring body, the sleeve is sleeved on the outside of the column and passed through the second side plate, and the ring body is also provided with a limiting groove for accommodating the first sheet, and the first sheet is exposed outside the second side plate.

[0023] Furthermore, the positive electrode assembly includes a pole and an inner insulating sheet separating the pole from the second side plate; the pole includes a pole head and a pole body integrally formed with the pole head, and the inner insulating sheet is arranged around the outside of the pole head.

[0024] Furthermore, the positive electrode assembly includes an electrode column, an insulating ring and an external connecting seat, the insulating ring is arranged outside the electrode column, and the external connecting seat is arranged outside the insulating ring and connected to the outer side of the second side plate.

[0025] Furthermore, it also includes a negative electrode assembly, wherein the negative electrode assembly and the positive electrode assembly are exposed on the same surface of the second side plate, and the negative electrode assembly includes a connecting piece connected to the second side plate.

[0026] Furthermore, the second side plate is further provided with a liquid injection hole for allowing electrolyte to enter the accommodating cavity, and the liquid injection hole is installed with a liquid blocking plug.

[0027] Furthermore, at least one explosion-proof groove is provided on each of the bottom plate and the cover plate. The explosion-proof groove is arc-shaped and faces the accommodating cavity.

[0028] In a second aspect, the present invention further provides a battery, comprising the battery housing as described in the first aspect and a battery cell disposed in a first accommodating cavity of the battery housing.

[0029] In a third aspect, the present invention further provides an electronic device, comprising the battery housing as described in the first aspect; or comprising the battery as described in the second aspect.

[0030] Compared with the prior art, the present invention has the following advantages:

[0031] The battery case of the present invention comprises at least two peripheral side panels, two adjacent side panels connected to each other, and the peripheral side panels are ring-shaped with open ends. The peripheral side panels adopt a split structure and are formed by connecting the side panels. The side panels can be directly made of sheet material without the need for stretching, thus avoiding the problems of material thinning and cracking caused by stretching, and are more convenient to process. Furthermore, components that need to be mounted on the peripheral side panels, such as positive and negative electrode assemblies, can be directly riveted or welded to the side panels, and then the side panels are connected to form the peripheral side panels. This reduces the number of interfering parts during riveting or welding, making the connection more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to help understand the present invention, and do not specifically limit the shapes and proportional dimensions of the components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the specific circumstances under the guidance of the present invention. In the drawings:

[0033] FIG1 is a schematic structural diagram of a battery housing according to a first embodiment of the present invention;

[0034] FIG2 is an exploded view of a battery housing according to a first embodiment of the present invention;

[0035] FIG3 is a partial enlarged view of point A in FIG2 ;

[0036] FIG4 is an exploded view of the positive electrode assembly in FIG2 ;

[0037] FIG5 is a cross-sectional view of a first embodiment of a battery housing according to the present invention;

[0038] FIG6 is a partial enlarged view of point B in FIG5 ;

[0039] FIG7 is an exploded view of a second embodiment of a battery housing according to the present invention;

[0040] FIG8 is an exploded view of a third embodiment of a battery housing according to the present invention;

[0041] FIG9 is a partial enlarged view of point C in FIG8 ;

[0042] FIG10 is a schematic structural diagram of a fourth embodiment of a battery housing according to the present invention;

[0043] FIG11 is an exploded view of a fourth embodiment of a battery housing according to the present invention;

[0044] FIG12 is an exploded view of a fifth embodiment of a battery housing according to the present invention;

[0045] FIG13 is a schematic structural diagram of a sixth embodiment of a battery housing according to the present invention;

[0046] FIG14 is an exploded view of a sixth embodiment of a battery housing according to the present invention;

[0047] FIG15 is a cross-sectional view of a sixth embodiment of a battery housing according to the present invention;

[0048] FIG16 is a partial enlarged view of point D in FIG15;

[0049] FIG17 is a structural diagram of a battery housing embodiment 7 of the present invention

[0050] FIG18 is an exploded view of a seventh embodiment of a battery housing according to the present invention;

[0051] FIG19 is a cross-sectional view of a seventh embodiment of a battery housing according to the present invention;

[0052] FIG20 is a partial enlarged view of point E in FIG19 . DETAILED DESCRIPTION

[0053] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0054] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0056] As shown in FIG. 1 and FIG. 2 , the present invention discloses a battery housing, which includes a bottom plate 1 , a peripheral side plate 2 and a cover plate 3 .

[0057] The peripheral side plate 2 includes at least two side plates, two adjacent side plates are connected, and the peripheral side plate 2 is annular with both ends open. The peripheral side plate 2 is connected to the bottom plate 1 to form a receiving cavity 210 with one end open.

[0058] The cover plate 3 is disposed opposite to the bottom plate 1 and seals the accommodating cavity 210 .

[0059] The peripheral side panels 2 are split and connected together by connecting side panels. The side panels can be made directly from sheet material, such as a flat plate or by bending a flat plate, without the need for stretching. This avoids the problems of material thinning and cracking caused by stretching, and makes processing more convenient. Furthermore, components required to be mounted on the peripheral side panels 2, such as the positive electrode assembly 4 and negative electrode assembly 5 described below, can be directly riveted or welded to the side panels. The side panels are then connected to form the peripheral side panels 2. This reduces the number of interfering parts during riveting or welding, making the connection more convenient.

[0060] At the same time, since the two ends of the peripheral side plate 2 are sealed by the bottom plate 1 and the cover plate 3, the connection positions of the peripheral side plate 2 and the bottom plate 1 and the cover plate 3 will not form large rounded corners, reducing the curvature of the four corners of the battery shell, thereby increasing the volume of the accommodating cavity 210. In this way, the battery cells installed in the accommodating cavity 210 can fully occupy the internal space, thereby improving the space utilization of the battery shell and facilitating increasing the capacity of the battery.

[0061] As a preferred embodiment, the side plate 2 includes 209

[0062] As shown in Figure 3, the first side panel 201 is provided with a first step panel 203 facing outward at both ends, and the second side panel 202 is provided with a second step panel 204 facing inward at both ends. The first step panel 203 is closely connected to the second step panel 204. The first side panel 201 and the second side panel 202 can be connected to form an annular peripheral side panel 2, or they can be connected to other side panels to form an annular peripheral side panel 2.

[0063] In the above, the thickness D2 of the first step plate 203 is smaller than the thickness D1 of the first side plate 201 to form a first step groove 205, and the thickness D2 of the second step plate 204 is smaller than the thickness D1 of the second side plate 202 to form a second step groove 206. The first step plate 203 is arranged in the second step groove 206, and the second step plate 204 is arranged in the first step groove 205.

[0064] The width B of the first step groove 205 is the same as the width B of the second step plate 204. The width B of the second step groove 206 is the same as the width B of the first step plate 203. The sum of the thickness D2 of the first step plate 203 and the second step plate 204 is the same as the thickness D1 of the first side plate 201 and the second side plate 202. Preferably, the thickness D1 of the first side plate 201 and the second side plate 202 is in the range of 0.03-0.4 mm, and the thickness D2 of the first step plate 203 and the second step plate 204 is in the range of 0.02-0.3 mm.

[0065] In some embodiments, as shown in Figures 2, 8, and 11, the first side panel 201 is a bent panel, and the second side panel 202 is a bent panel. In other embodiments, as shown in Figures 7, 12, 14, and 18, the first side panel 201 is a bent panel, and the second side panel 202 is a flat panel. Of course, the first side panel 201 and the second side panel 202 can also be curved panels, and can be designed according to actual needs. The structures of the first side panel 201 and the second side panel 202 are not limited here.

[0066] In some embodiments, as shown in FIG5 , the cross-sectional shape of the accommodating cavity 210 is L-shaped; in other embodiments, as shown in FIG15 and FIG19 , the cross-sectional shape of the accommodating cavity 210 is rectangular. Of course, it can also be annular, for the production of annular batteries. The bottom plate 1 and the cover plate 3 are both made of metal or alloy materials, and the alloy material is preferably stainless steel, more preferably stainless steel 316L. Preferably, in this embodiment, the bottom plate 1 and the cover plate 3 are both made of conductive stainless steel; the cross-sectional shape of the bottom plate 1 and the cover plate 3 corresponds to the cross-sectional shape of the accommodating cavity 210.

[0067] Furthermore, as shown in FIG9 , an annular groove 207 is provided at an open end of the peripheral side plate 2 , and the bottom plate 1 or the cover plate 3 is fitted into the annular groove 207 and fits in contact with the bottom surface of the annular groove 207 ; or,

[0068] Annular grooves 207 are provided at the two open ends of the peripheral side plate 2 . The bottom plate 1 and the cover plate 3 are respectively fitted in the two annular grooves 207 and fit in contact with the bottom surfaces of the corresponding annular grooves 207 .

[0069] Preferably, the annular groove 207 includes a first groove portion 208 provided on the first side plate 201 and a second groove portion 209 provided on the second side plate 202. The first groove portion 208 on the inner wall of the first side plate 201 and the second groove portion 209 on the inner wall of the second side plate 202 are located at the same horizontal plane, which facilitates the installation and positioning of the cover plate 3 and / or the cover plate 3. The bottom plate 1 and the cover plate 3 are connected to the annular groove 207 by welding, thereby sealing the accommodating cavity 210.

[0070] As shown in Figures 1, 2, 7, 8, 10, 11, 12, 13, 14, 17 and 18, the battery case also includes a positive electrode assembly 4 and a negative electrode assembly 5. At least part of the positive electrode assembly 4 is arranged on the inner side of the second side plate 202, which facilitates the installation of the positive electrode assembly 4 and reduces the requirements for the packaging process, thereby greatly improving production efficiency and product qualification rate; the negative electrode assembly 5 and the positive electrode assembly 4 are exposed on the same surface of the second side plate 202, and the negative electrode assembly 5 is arranged on the outside of the second side plate 202. When the battery case is in use, the battery cell only needs to be connected to the second side plate 102 to be conductively connected to the negative electrode assembly 5.

[0071] Example 1:

[0072] 1 to 6 , a battery housing includes a bottom plate 1 , a peripheral side plate 2 , and a cover plate 3 .

[0073] The peripheral side plate 2 includes a first side plate 201 and a second side plate 202. Two adjacent first side plates 201 and second side plates 202 are connected. The peripheral side plate 2 is annular with both ends open. The peripheral side plate 2 is connected to the bottom plate 1 to form a receiving cavity 210 with one end open.

[0074] The cover plate 3 is disposed opposite to the bottom plate 1 and seals the accommodating cavity 210 .

[0075] The peripheral side plate 2 adopts a split structure, including a first side plate 201 and a second side plate 202 connected in a ring shape. The two adjacent first side plates 201 and the second side plates 202 are fitted together, so that the peripheral side plate 2 is not prone to thinning and cracking during the stretching process. Since the first side plate 201 and the second side plate 202 are sheet-like plates, they are easy to process, and are convenient for riveting and welding the positive electrode assembly 4 and the negative electrode assembly 5, and are easy to install.

[0076] At the same time, since the two ends of the peripheral side plate 2 are sealed by the bottom plate 1 and the cover plate 3, the connection positions of the peripheral side plate 2 and the bottom plate 1 and the cover plate 3 will not form large rounded corners, reducing the curvature of the four corners of the battery shell, thereby increasing the volume of the accommodating cavity 210. In this way, the battery cells installed in the accommodating cavity 210 can fully occupy the internal space, thereby improving the space utilization of the battery shell and facilitating increasing the capacity of the battery.

[0077] In this embodiment, the first side panel 201 and the second side panel 202 are both bent panels, and the connection points between the first and second side panels 201, 202 are symmetrically located along the width of the peripheral side panel 2. After the first and second side panels 201, 202 are connected, the cross-sectional shape of the accommodating cavity 210 becomes L-shaped. The cross-sectional shapes of the bottom panel 1 and the cover panel 3 correspond to the cross-sectional shape of the accommodating cavity 210 and are also L-shaped, thus forming an L-shaped battery housing.

[0078] The positive electrode assembly 4 is provided on the second side plate 202 of the L-shaped protruding end of the annular structure. The positive electrode column 401 includes a positive electrode column 401, an outer insulating member 402, an inner insulating member 403 and a conductive sheet 404. The positive electrode column 401 includes a column body 4011 and a first sheet 4012 and a second sheet 4013 connected to the two ends of the column body 4011. The column body 4011 passes through the second side plate 202 and extends to the outside of the second side plate 202. The outer insulating member 402, the inner insulating member 403 and the conductive sheet 404 are all arranged in a ring outside the column body 4011. Most of the outer insulating member 402 is located on the outside of the second side plate 202, and the inner insulating member 403 is located on the inside of the second side plate 202. The outer insulating member 402 and the inner insulating member 403 are used in conjunction with each other to insulate the positive electrode column 401 from the second side plate 202. The conductive sheet 404 is located outside the inner insulating member 403, and the second sheet 4013 is located outside the conductive sheet 404.

[0079] Among them, the outer insulating part 402 includes a ring body 4021 and a sleeve 4022 connected to the ring body 4021. The sleeve 4022 is sleeved on the outside of the column 4011 and passed through the second side plate 202. The ring body 4021 is also provided with a limiting groove 4023 for accommodating the first sheet 4012, and the first sheet 4012 is exposed outside the second side plate 202.

[0080] The negative electrode assembly 5 and the positive electrode assembly 4 are exposed on the same surface of the second side plate 202. The negative electrode assembly 5 includes a connecting piece connected to the second side plate 202. The connecting piece is made of nickel material. The negative electrode assembly 5 is arranged on the outside of the second side plate 202. When the battery shell is in use, the battery cell only needs to be connected to the second side plate 102 to be conductively connected to the negative electrode assembly 5.

[0081] The second side plate 202 also includes an injection hole 2021 for allowing electrolyte (not shown) to enter the accommodating chamber 210. This hole 2021 is fitted with an interference-fit plug 6 made of stainless steel. The injection hole 2021 is located on the second side plate 202 between the positive electrode assembly 4 and the negative electrode assembly 5, facilitating the filling of the accommodating chamber 210 with electrolyte.

[0082] Furthermore, at least one explosion-proof groove 7 is provided on each of the base plate 1 and the cover plate 3. The explosion-proof groove 7 is arc-shaped and faces the accommodating cavity 210. Preferably, the explosion-proof groove 7 faces the side away from the human body to achieve directional explosion and prevent the wearer from being injured when the battery explodes.

[0083] The explosion-proof groove 7 is provided on the inner side of the base plate 1 and the cover plate 3, and is located on the side away from the positive electrode assembly 4. The depth of the explosion-proof groove 7 is 0.01-0.26 mm, and the width is 0.05-2.0 mm. Under these parameters, the explosion limit of the explosion-proof groove 7 is 0.7-2.5 MPa. As a preferred method, the explosion-proof groove 7 is formed by laser or chemical etching.

[0084] Example 2:

[0085] Referring to FIG7 , a battery housing is shown, which is based on the first embodiment, except that:

[0086] The first side plate 201 is a bent plate, and the second side plate 202 is a flat plate. The connection between the first side plate 201 and the second side plate 202 is located along the length of one side of the peripheral side plate 2. After the first side plate 201 and the second side plate 202 are connected, the cross-sectional shape of the accommodating cavity 210 becomes L-shaped. The second side plate 202 is located at the protruding end of the L-shaped annular structure, facilitating the installation of the positive electrode assembly 4 and the negative electrode assembly 5.

[0087] Example 3:

[0088] Referring to FIG8 and FIG9 , a battery housing is shown, which is based on the first embodiment, except that:

[0089] An annular groove 207 is provided on the inner sides of the first side plate 201 and the second side plate 202, for the cover plate 3 to abut against. A first groove 208 on the inner wall of the first side plate 201 and a second groove 209 on the inner wall of the second side plate 202 are located on the same horizontal plane, facilitating the installation and positioning of the cover plate 3. The cover plate 3 is connected to the annular groove 207 by welding and then dispensing glue, thereby sealing the accommodating cavity 210.

[0090] Example 4:

[0091] Referring to FIG10 and FIG11 , a battery housing is shown, which is based on the first embodiment, except that:

[0092] The first side plate 201 and the second side plate 202 are both bent plates, and the connection between the first side plate 201 and the second side plate 202 is symmetrically located along the length of the peripheral side plate 2. After the first side plate 201 and the second side plate 202 are connected, the cross-section of the accommodating cavity 210 is rectangular.

[0093] The cross-sectional shape of the bottom plate 1 and the cover plate 3 corresponds to the cross-sectional shape of the accommodating cavity 210 , and is also rectangular, so as to be used to form a battery housing with a rectangular structure.

[0094] Embodiment 5:

[0095] Referring to FIG12 , a battery housing is shown, which is based on the first embodiment, except that:

[0096] The first side plate 201 is a bent plate, and the second side plate 202 is a flat plate. The connection between the first and second side plates 201, 202 is located along the width of one side of the peripheral side plate 2. The connection between the first and second side plates 201, 202 creates a rectangular cross-sectional shape for the accommodating cavity 210. The second side plate 202 is located along the width of one side of the rectangular accommodating cavity 210, facilitating the installation of the positive electrode assembly 4 and the negative electrode assembly 5. The positive electrode assembly 4 and the negative electrode assembly 5 are mounted on the second side plate 202, which is located along the width of the rectangular ring structure.

[0097] The cross-sectional shape of the bottom plate 1 and the cover plate 3 corresponds to the cross-sectional shape of the annular structure, and is also rectangular, so as to be used to form a battery housing with a rectangular structure.

[0098] Example 6:

[0099] Referring to FIG. 13 to FIG. 16 , a battery housing is shown, based on the fifth embodiment, with the following differences:

[0100] The positive electrode assembly 4 includes a post 405 and an inner insulating sheet 406 separating the post 405 from the second side plate 202. The post 405 is made of molybdenum, nickel, aluminum, or copper, preferably aluminum. The post 405 includes a post head 4051 and a post body 4052 integrally formed with the post head 4051. The inner insulating sheet 406 is disposed around the outside of the post head 4051.

[0101] At the same time, the inner diameter of the inner insulating sheet 406 is larger than the diameter of the pole column 4052, and can cover the pole column 4052, achieving better insulation and sealing. The pole head 4051 passes through the second side plate 202 and extends to the outside of the second side plate 202. The internal inner insulating sheet 406 is used to assemble and fix the positive electrode assembly 4 to the second side plate 202, achieving a tight seal and insulation between the positive electrode assembly 4 and the second side plate 202, thereby improving battery performance.

[0102] Embodiment seven:

[0103] Referring to FIG. 17 to FIG. 20 , a battery housing is shown, based on the fifth embodiment, with the following differences:

[0104] The positive electrode assembly 4 includes an electrode column 407, an insulating ring 408 and an external connecting seat 409. The material of the electrode column 407 is preferably molybdenum. The insulating ring 408 is arranged on the outside of the electrode column 407. The material of the insulating ring 408 is preferably glass. The external connecting seat 409 is arranged on the outside of the insulating ring 408 and is connected to the outside of the second side plate 202. Preferably, the external connecting seat 409 is connected to the second side plate 202 by welding and then gluing.

[0105] Embodiment 8:

[0106] A battery includes a battery housing having the structure described above and a battery cell 8 disposed within a housing cavity 210 of the battery housing. The battery cell 8 is electrically connected to a positive electrode assembly 4. The housing cavity 210 of the battery housing may be filled with an electrolyte, which facilitates ion conduction between the positive electrode assembly 4 and the negative electrode assembly 5, thereby ensuring the battery's advantages of high voltage and high specific energy.

[0107] As a preferred embodiment, the shape of the battery core 8 corresponds to the cross-sectional shape of the accommodating cavity 210 .

[0108] Embodiment 8:

[0109] An electronic device is provided with a battery housing having the above structure; or a battery having the above structure.

[0110] It should be understood that the above description is intended to be illustrative and not limiting. Many embodiments and applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the preceding claims, along with the full scope of equivalents to which such claims are entitled. For the purpose of completeness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein from the preceding claims is not a disclaimer of such subject matter, nor should it be considered that the applicants did not consider such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A battery housing, characterized in that: include: Base plate; A peripheral side plate, comprising at least two side plates, two adjacent side plates are connected, the peripheral side plates are in a ring shape with both ends open, and the peripheral side plates are connected to the bottom plate to form a receiving cavity with one end open; and, The cover plate is arranged opposite to the bottom plate and seals the accommodating cavity.

2. The battery housing according to claim 1, characterized in that: The peripheral side plate includes a first side plate and a second side plate, the first side plate is provided with first step plates facing outward at both ends, the second side plate is provided with second step plates facing inward at both ends, and the first step plate is fitted and connected with the second step plate.

3. The battery housing according to claim 2, characterized in that: The thickness of the first step plate is smaller than that of the first side plate to form a first step groove, the thickness of the second step plate is smaller than that of the second side plate to form a second step groove, the first step plate is arranged in the second step groove, and the second step plate is arranged in the first step groove.

4. The battery case according to claim 3, characterized in that: The width of the first step groove is the same as that of the second step plate, the width of the second step groove is the same as that of the first step plate, and the sum of the thicknesses of the first step plate and the second step plate is the same as the thicknesses of the first side plate and the second side plate.

5. The battery casing according to claim 4, characterized in that: The thickness of the first side plate and the second side plate ranges from 0.03 to 0.4 mm, and the thickness of the first step plate and the second step plate ranges from 0.02 to 0.3 mm.

6. The battery casing according to claim 2, characterized in that: The first side plate is a bent plate, and the second side plate is a bent plate or a flat plate.

7. The battery case according to claim 3, characterized in that: The cross-sectional shape of the accommodating cavity is L-shaped or rectangular; the cross-sectional shapes of the bottom plate and the cover plate correspond to the cross-sectional shape of the accommodating cavity.

8. The battery casing according to claim 1, characterized in that: An annular groove is provided at an open end of the peripheral side plate, and the bottom plate or the cover plate is fitted in the annular groove and fits with the bottom surface of the annular groove; or, The two open ends of the peripheral side plate are both provided with annular grooves, and the bottom plate and the cover plate are respectively fitted in the two annular grooves and fit with the bottom surfaces of the corresponding annular grooves.

9. The battery casing according to any one of claims 1 to 8, characterized in that: It also includes a positive electrode assembly, at least part of which is arranged on the inner side of the second side plate.

10. The battery casing according to claim 9, characterized in that: The positive electrode assembly includes a positive electrode column, an outer insulating member, an inner insulating member and a conductive sheet. The positive electrode column includes a column body and a first sheet body and a second sheet body connected to the two ends of the column body. The column body passes through the second side plate and extends to the outside of the second side plate. The outer insulating member, the inner insulating member and the conductive sheet are all arranged outside the column body, and the second sheet body is located on the outside of the conductive sheet.

11. The battery housing according to claim 10, characterized in that: The outer insulating member includes a ring body and a sleeve connected to the ring body, the sleeve is sleeved on the outside of the column and penetrated into the second side plate, the ring body is also provided with a limiting groove for accommodating the first sheet body, and the first sheet body is exposed outside the second side plate.

12. The battery casing according to claim 9, characterized in that: The positive electrode assembly includes a pole and an inner insulating sheet separating the pole from the second side plate; the pole includes a pole head and a pole body integrally formed with the pole head, and the inner insulating sheet is arranged around the outside of the pole head.

13. The battery housing according to claim 9, characterized in that: The positive electrode assembly includes an electrode column, an insulating ring and an external connection seat, wherein the insulating ring is arranged outside the electrode column, and the external connection seat is arranged outside the insulating ring and connected to the outer side of the second side plate.

14. The battery casing according to claim 9, characterized in that: It also includes a negative electrode assembly. The negative electrode assembly and the positive electrode assembly are exposed on the same surface of the second side plate. The negative electrode assembly includes a connecting piece connected to the second side plate.

15. The battery case according to claim 14, characterized in that: The second side plate is also provided with a liquid injection hole for allowing electrolyte to enter the accommodating cavity, and the liquid injection hole is installed with a liquid blocking plug.

16. The battery casing according to any one of claims 1 to 8, characterized in that: At least one explosion-proof groove is disposed on each of the bottom plate and the cover plate. The explosion-proof groove is arc-shaped and faces the accommodating cavity.

17. A battery, characterized in that: It comprises a battery casing as described in any one of claims 1 to 16 and a battery cell arranged in a receiving cavity of the battery casing.

18. An electronic device, characterized in that: Comprising a battery casing as claimed in any one of claims 1 to 16; or comprising a battery as claimed in claim 17.

Images