Battery monomer, battery device and electric equipment

Abstract

The utility model discloses a battery monomer, a battery device and electric equipment, the battery monomer comprises a shell, an electrode assembly and a limiting assembly, and the electrode assembly is located in the shell; the limiting assembly is connected to the inner wall of the shell and abuts against the outer surface of the electrode assembly. When the electrode assembly is recycled, the limiting assembly is integrally disassembled along with the shell. Through the combined action of the shell, the electrode assembly and the limiting assembly, the limiting assembly directly abuts against the outer surface of the electrode assembly, so that the electrode assembly is fixed relative to the shell, the electrode assembly is kept at a stable position in the shell, shaking is reduced, and the stability of the electrode assembly is improved. When the electrode assembly needs to be recycled, the electrode assembly can be reused by removing the abutting relation between the limiting assembly and the electrode assembly, the problem that the electrode assembly is difficult to separate due to glue bonding in the recycling process is solved, and then the electrode assembly is convenient to disassemble, can be efficiently recycled and the like.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery cell, a battery device, and an electrical device. Background Technology

[0002] Electrical equipment is mainly driven by several battery cells. The electrode components in existing battery cells are difficult to reuse during the recycling process. Utility Model Content

[0003] In view of the above problems, this application provides a battery cell, a battery device, and an electrical device to solve the technical problem that the electrode components in existing battery cells are difficult to reuse during the recycling process.

[0004] To address the aforementioned technical problems, this application provides a battery cell comprising: a housing; an electrode assembly located within the housing; and a limiting component connected to the inner wall of the housing, the limiting component abutting against the outer surface of the electrode assembly; wherein, when the electrode assembly is recycled, the limiting component is disassembled integrally with the housing. Through the combined action of the housing, the electrode assembly, and the limiting component, the limiting component directly abuts against the outer surface of the electrode assembly, thereby fixing the electrode assembly relative to the housing, maintaining a stable position within the housing, reducing swaying, and thus improving the stability of the electrode assembly. When the electrode assembly needs to be recycled, the abutment relationship between the limiting component and the electrode assembly can be released, allowing the electrode assembly to be reused. This solves the problem of difficulty in separating the electrode assembly during recycling due to adhesive bonding, thus enabling convenient disassembly and efficient recycling of the electrode assembly.

[0005] In some embodiments, the electrode assembly includes a top surface and a bottom surface disposed opposite each other along the height direction; the limiting assembly includes multiple limiting members connected to the inner wall of the housing, with some limiting members abutting the top surface and / or some limiting members abutting the bottom surface. By having corresponding limiting members abut on both the top and bottom surfaces of the electrode assembly, axial positioning of the electrode assembly is achieved, ensuring a stable position of the electrode assembly in the height direction within the housing and reducing sway. Furthermore, during the electrode assembly recycling process, only multiple limiting members need to be removed for the electrode assembly to be completely extracted, improving recycling efficiency and the feasibility of reuse, and reducing recycling costs.

[0006] In some embodiments, the electrode assembly further includes an outer surface located between the top and bottom surfaces; the limiting member includes a first limiting portion and a second limiting portion; the first limiting portion is connected to the top wall of the housing and abuts against the top surface, or the first limiting portion is connected to the bottom wall of the housing and abuts against the bottom surface; the second limiting portion is connected to the side wall of the housing and abuts against the outer surface. By defining the limiting member including the aforementioned first and second limiting portions, axial and radial limiting of the outer surface of the electrode assembly can be achieved, allowing the top, bottom, and outer surfaces of the electrode assembly to maintain a stable position within the housing and reduce shaking. During the electrode assembly recycling process, the electrode assembly can be easily removed by loosening or removing the first and second limiting portions, maintaining the integrity of the electrode assembly without damaging its structure or using solvents, significantly improving the recycling efficiency and reuse value of the electrode assembly.

[0007] In some embodiments, the electrode assembly further includes an outer surface located between the top surface and the bottom surface; the outer surface has a corner, and a limiting member is provided at the corner. The limiting member at the corner further enhances the radial limiting of the electrode assembly and further improves the stability of the electrode assembly.

[0008] In some embodiments, the limiting component includes a plurality of limiting members, each including a foam layer fixedly connected to the inner wall of the housing and abutting against the outer surface of the electrode assembly. By including a foam layer in the limiting member, the electrode assembly is not only fixed relative to the housing, thereby improving the stability of the electrode assembly, but also manufacturing costs can be reduced.

[0009] In some embodiments, the battery cell includes a drying element disposed within the housing. By disposing the drying element within the housing, moisture inside the battery cell can be continuously absorbed, reducing the risk of moisture absorption of the electrode assembly during storage or use, thereby maintaining the electrode assembly in a dry state during recycling and improving the reusability of the electrode assembly.

[0010] In some embodiments, a drying space is formed between the limiting component and the electrode assembly, and a drying element is disposed within the drying space. By disposing the drying element within the drying space formed by the limiting component and the electrode assembly, the limiting function and the drying function can be integrated, which not only reduces the use or cost of additional structures but also improves the recyclability and service life of the electrode assembly. At the same time, confining the drying element within the limiting component reduces movement of the drying element, thereby reducing its impact on the electrode assembly.

[0011] In some embodiments, the housing includes a first housing and a second housing, which are detachably connected. The limiting assembly includes multiple limiting members, some of which are connected to the inner wall of the first housing and some of which are connected to the inner wall of the second housing. The housing, composed of the first and second housings, improves the ease of assembly and disassembly of the electrode assembly, thereby increasing the recycling efficiency of the electrode assembly. Furthermore, the detachable connection between the first and second housings allows the limiting members to more stably abut against the outer surface of the electrode assembly, further reducing the risk of electrode assembly wobbling.

[0012] In some embodiments, the battery cell includes a heat-conducting component and a heat-dissipating component. The heat-conducting component is disposed between the electrode assembly and the inner wall of the housing, and the heat-dissipating component is connected to the outer surface of the housing, with its projected area on the housing at least partially overlapping with that of the heat-dissipating component. By defining the positional and area relationships of the heat-conducting and heat-dissipating components within the housing, the heat conduction path can be shortened, and the heat generated by the electrode assembly can be quickly dissipated to the external environment of the housing. This effectively solves the problem of insufficient heat dissipation caused by heat accumulation in the electrode assembly during operation, thereby reducing the performance degradation or safety risks caused by localized overheating of the electrode assembly. Through the combined action of the heat-conducting and heat-dissipating components, the battery cell maintains a suitable temperature during long-term charging and discharging, thereby enhancing the safety and reliability of the battery cell.

[0013] In some embodiments, the heat sink includes at least two sub-heat sinks, which are detachably connected in a ring shape and fixedly sleeved on the outer surface of the housing, thereby locking the first housing and the second housing. By defining a heat sink as including at least two sub-heat sinks, not only can the heat dissipation function be achieved, allowing heat to be transferred to the external environment, but also the mechanical connection function can be achieved, allowing the first housing and the second housing to be in a locked or unlocked state.

[0014] In some embodiments, the housing includes an outer cylinder, a first cover, and a second cover. The first cover is connected to one end of the outer cylinder, and the second cover is connected to the other end of the outer cylinder. The limiting assembly includes multiple limiting members, some of which are connected to the inner surface of the first cover and some of which are connected to the inner surface of the second cover. The first cover abuts a portion of the limiting members against the top surface of the electrode assembly, and the second cover abuts a portion of the limiting members against the bottom surface of the electrode assembly. Through the combined action of the outer cylinder, the first cover, the second cover, and the multiple limiting members, when the electrode assembly needs to be recycled, the first and second covers can be removed, easily separating the limiting members from the electrode assembly, thus improving the recycling efficiency and reuse value of the electrode assembly.

[0015] In some embodiments, the battery cell is cylindrical; a first threaded component and a second threaded component are provided inside the outer cylinder. The first threaded component is connected to the inner surface of the first cover, and a limiting component is connected to the surface of the first threaded component away from the first cover; the second threaded component is connected to the inner surface of the second cover, and a limiting component is connected to the surface of the second threaded component away from the second cover; wherein, the first threaded component is threaded to one end of the outer cylinder, and the limiting component abuts against the top surface of the electrode assembly; the second threaded component is threaded to the other end of the outer cylinder, and the limiting component abuts against the bottom surface of the electrode assembly. Providing the aforementioned first and second threaded components inside the outer cylinder not only improves the ease of installation and removal of the limiting component without the need for additional tools or destructive operations, thereby improving the recycling efficiency of the electrode assembly; but also strengthens the first and second covers, thereby reducing the risk of damage to the first and second covers; and also allows the limiting component to stably abut against the outer surface of the electrode assembly, further reducing the risk of electrode assembly shaking or displacement.

[0016] In some embodiments, the outer surface of the first cover is provided with a first reinforcing rib; and / or, the outer surface of the second cover is provided with a second reinforcing rib. The first reinforcing rib can improve the strength of the first cover, thereby improving the strength of the shell, and thus reducing the risk of deformation of the shell due to external forces. And / or, the second reinforcing rib can improve the strength of the second cover, thereby improving the strength of the shell, and thus reducing the risk of deformation of the shell due to external forces.

[0017] In some embodiments, the battery cell is prismatic or cylindrical. By defining the shape of the battery cell, the versatility of the limiting component can be improved, thereby increasing the recycling rate of the electrode component, etc.

[0018] To address the aforementioned technical problems, another technical solution adopted in this application is to provide a battery device comprising the aforementioned battery cell. The battery device includes the aforementioned battery cell, and when the electrode assembly needs to be recycled, the electrode assembly can be reused by releasing the contact relationship between the limiting component and the electrode assembly. This solves the problem of the electrode assembly being difficult to separate during recycling due to adhesive bonding, thereby enabling convenient disassembly and efficient recycling of the electrode assembly.

[0019] To address the aforementioned technical problems, another technical solution adopted in this application is to provide an electrical device including the aforementioned battery device. Through the battery device, when the electrode assembly needs to be recycled, the limiting component can be released from contact with the electrode assembly to reuse the electrode assembly. This solves the problem of the electrode assembly being difficult to separate due to adhesive bonding during recycling, thereby enabling convenient disassembly and efficient recycling of the electrode assembly.

[0020] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0022] Figure 1 This is a schematic diagram of the structure of the first embodiment of the battery cell of this application;

[0023] Figure 2 yes Figure 1 A schematic diagram of the cross-section of AA is shown below;

[0024] Figure 3 yes Figure 2 An enlarged schematic diagram of B is shown below;

[0025] Figure 4 A cross-sectional schematic diagram of the second embodiment of the battery cell of this application;

[0026] Figure 5 yes Figure 4 An enlarged schematic diagram of C is shown below;

[0027] Figure 6 This is a structural schematic diagram of the third embodiment of the battery cell of this application;

[0028] Figure 7 This is a cross-sectional schematic diagram of the third embodiment of the battery cell of this application;

[0029] Figure 8 This is a cross-sectional schematic diagram of the fourth embodiment of the battery cell of this application;

[0030] Figure 9 This is a top view of the first cover in the third embodiment of the battery cell of this application;

[0031] Figure 10 This is an exploded schematic diagram of a battery device according to one or more embodiments;

[0032] Figure 11 It is a structural schematic diagram of an electrical device according to one or more embodiments.

[0033] The reference numerals in the accompanying drawings of the specific embodiments are as follows: 10, battery cell; 11, housing; 112, first housing; 113, second housing; 114, outer cylinder; 115, first cover; 1151, first reinforcing rib; 116, second cover; 117, first threaded component; 118, second threaded component; 12, electrode assembly; 12a, top surface; 12b, bottom surface; 12c, outer surface; 13, limiting assembly; 131, limiting component; 1311 13111, First sub-limiting part; 13112, Second sub-limiting part; 1312, Second limiting part; 13121, Third sub-limiting part; 13122, Fourth sub-limiting part; 1313, Drying space; 1315, Foam layer; 14, Drying component; 15, Heat-conducting component; 16, Heat-dissipating component; 161, Sub-heat-dissipating component; 100, Battery device; 20, First housing; 30, Second housing; 200, Electrical components. Detailed Implementation

[0034] The embodiments of the technical solution of this application will be described in detail below. The following embodiments are only used to illustrate the technical solution of this application more clearly, and are therefore only examples, and should not be used to limit the scope of protection of this application.

[0035] Unless otherwise defined, 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0036] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, unless otherwise explicitly specified, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more sets (including two sets), and "multiple pieces" refers to two or more pieces (including two pieces).

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0039] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0040] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0041] Electrical equipment is primarily driven by several individual battery cells. The electrode assemblies within these existing battery cells are difficult to reuse during the recycling process. The specific reasons are as follows: Adhesive is used to separate the battery cell casing from the electrode assemblies. This adhesive absorbs and disperses vibrations and impacts generated during battery cell use, preventing relative movement between the electrode assemblies and thus maintaining the stability and integrity of the battery cell. However, the use of adhesive bonding presents a technical challenge in reusing the electrode assemblies after recycling.

[0042] To address the difficulty in reusing electrode components in existing battery cells during recycling, this application provides a battery cell comprising a housing, an electrode assembly, and a limiting assembly. The electrode assembly is located within the housing; the limiting assembly is connected to the inner wall of the housing and abuts against the outer surface of the electrode assembly.

[0043] Through the combined action of the housing, electrode assembly, and limiting component, the limiting component directly abuts against the outer surface of the electrode assembly, fixing the electrode assembly relative to the housing. This maintains the electrode assembly in a stable position within the housing, reducing wobbling and improving its stability. When the electrode assembly needs to be recycled, simply releasing the limiting component allows for reuse. This solves the problem of difficulty in separating electrode assemblies due to adhesive bonding during recycling, enabling convenient disassembly and efficient recycling of the electrode assembly.

[0044] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 as well as Figure 5 , Figure 1 This is a schematic diagram of the structure of the first embodiment of the battery cell of this application; Figure 2 yes Figure 1 A schematic diagram of the cross-section of AA is shown below; Figure 3 yes Figure 2 An enlarged schematic diagram of B is shown below; Figure 4 A cross-sectional schematic diagram of the second embodiment of the battery cell of this application; Figure 5 yes Figure 4 The enlarged schematic diagram shown is for point C. This application provides a single battery cell. The single battery cell 10 includes a housing 11, an electrode assembly 12, and a limiting assembly 13. The electrode assembly 12 is located inside the housing 11. The limiting assembly 13 is connected to the inner wall of the housing 11. The limiting assembly 13 abuts against the outer surface of the electrode assembly 12. When the electrode assembly 12 is recycled, the limiting assembly 13 is disassembled integrally with the housing 11.

[0045] The battery cell 10 provides driving force for the electrical device (not shown in the figure). The shape of the battery cell 10 may be, but is not limited to, a square or a circle. The housing 11 can accommodate the electrode assembly 12 so that the electrode assembly 12 is located inside the housing 11.

[0046] The limiting component 13 serves a limiting function. The limiting component 13 may be, but is not limited to, at least one of the following: an nth limiting part, a limiting spring, and a wedge block. The limiting component 13 is detachably or fixedly connected to the inner wall of the housing 11. In this embodiment, the limiting component 13 is adhesively fixed to the inner wall of the housing 11.

[0047] Furthermore, the limiting component 13 is configured to abut against the outer surface of the electrode assembly 12. The limiting component 13 contacts and presses against the outer surface of the electrode assembly 12, meaning that the limiting component 13 and the outer surface of the electrode assembly 12 can be quickly separated, rather than being fixedly connected. The fixed state can be, but is not limited to, welding, bonding, adsorption, and screws.

[0048] The outer surface of the electrode assembly 12 may include a top surface 12a, a bottom surface 12b, and an outer surface 12c. The limiting component 13 may abut against the top surface 12a and the bottom surface 12b of the electrode assembly 12; or, the limiting component 13 may abut against the top surface 12a, the bottom surface 12b, and the outer surface 12c of the electrode assembly 12. The specific position of the limiting component 13 abutting against the outer surface of the electrode assembly 12 is not limited, as long as it can fix the electrode assembly 12 relative to the housing 11.

[0049] The electrode assembly 12 includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of a single battery cell, active ions repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through. The positive electrode can be a positive electrode sheet, which may include a positive current collector and a positive active material disposed on at least one surface of the positive current collector. The negative electrode can be a negative electrode sheet, which may include a negative current collector. An insulating layer (not shown in the figure) may be provided on the outer surface of the electrode assembly 12. When the limiting component 13 abuts against the outer surface of the electrode assembly 12, the limiting component 13 abuts against the insulating layer.

[0050] Through the combined action of the housing 11, the electrode assembly 12 and the limiting component 13, the limiting component 13 directly abuts against the outer surface of the electrode assembly 12, so that the electrode assembly 12 is fixed relative to the housing 11, thereby keeping the electrode assembly 12 in a stable position within the housing 11 and reducing shaking, thereby improving the stability of the electrode assembly 12.

[0051] When the electrode assembly 12 needs to be recycled, since the limiting component 13 is directly connected to the inner wall of the housing 11, the limiting component 13 is disassembled along with the housing 11 during the disassembly process. That is, there is no order in which the housing 11 and the limiting component 13 are disassembled. Therefore, disassembling the housing 11 releases the contact relationship between the limiting component 13 and the electrode assembly 12 and allows the electrode assembly 12 to be reused. This solves the problem that the electrode assembly 12 is difficult to separate during the recycling process due to glue adhesion, thus making the electrode assembly 12 easy to disassemble and efficiently recycled.

[0052] In some embodiments, the electrode assembly 12 includes a top surface 12a and a bottom surface 12b disposed opposite each other along the height direction X. The limiting assembly 13 includes a plurality of limiting members 131. The plurality of limiting members 131 are connected to the inner wall of the housing 11. Some of the limiting members 131 abut against the top surface 12a, and / or some of the limiting members 131 abut against the bottom surface 12b.

[0053] Along the height direction X, the top surface 12a can be located at the top of the electrode assembly 12, and the bottom surface 12b can be located at the bottom of the electrode assembly 12. The top surface 12a of the electrode assembly 12 can be provided with a pressure relief valve and electrode tabs, etc.

[0054] The limiting component 13 includes multiple limiting members 131. The limiting members 131 serve a certain limiting function. The number of limiting members 131 may be, but is not limited to, two, three, or more than four. The multiple limiting members 131 are detachably or fixedly connected to the inner wall of the housing 11. At least some of the multiple limiting members 131 abut against the top surface 12a of the electrode assembly 12, achieving axial limiting of the electrode assembly 12, so that the top surface 12a of the electrode assembly 12 maintains a stable position within the housing 11 and reduces shaking. Alternatively, at least some of the multiple limiting members 131 abut against the bottom surface 12b of the electrode assembly 12, achieving axial limiting of the electrode assembly 12, so that the bottom surface 12b of the electrode assembly 12 maintains a stable position within the housing 11 and reduces shaking. Alternatively, at least some of the plurality of limiting members 131 abut against the top surface 12a of the electrode assembly 12, and at least some of the plurality of limiting members 131 abut against the bottom surface 12b of the electrode assembly 12.

[0055] The limiting member 131 abutting the top surface 12a of the electrode assembly 12 and the limiting member 131 abutting the bottom surface 12b of the electrode assembly 12 may be the same or different, and this is not limited here. In this embodiment, the structure of the limiting member 131 at the top surface 12a of the electrode assembly 12 is the same as the structure of the limiting member 131 at the bottom surface 12b of the electrode assembly 12. When the limiting member 131 includes a first limiting part 1311 and a second limiting part 1312, both the top surface 12a and the bottom surface 12b of the electrode assembly 12 are provided with the first limiting part 1311 and the second limiting part 1312. Alternatively, when the limiting member 131 includes a foam layer 1315, both the top surface 12a and the bottom surface 12b of the electrode assembly 12 are provided with a foam layer 1315. In other embodiments, the top surface 12a of the electrode assembly 12 is provided with a first limiting portion 1311 and a second limiting portion 1312, and the bottom surface 12b of the electrode assembly 12 is provided with a foam layer 1315. When the limiting member 131 has other structures, the top surface 12a and the bottom surface 12b of the electrode assembly 12 may have other combinations or other structures, which will not be described in detail here.

[0056] The electrode assembly 12 abuts against the corresponding limiting member 131 on its top surface 12a and / or bottom surface 12b, which not only achieves axial limiting of the electrode assembly 12, but also keeps the height direction X of the electrode assembly 12 in a stable position within the housing 11, reducing swaying. Furthermore, during the recycling process, only multiple limiting members 131 need to be removed for the electrode assembly 12 to be completely extracted, improving the recycling efficiency and reuse feasibility of the electrode assembly 12, and reducing recycling costs.

[0057] Continue reading Figures 1 to 5In some embodiments, the electrode assembly 12 further includes an outer surface 12c located between the top surface 12a and the bottom surface 12b. The limiting member 131 includes a first limiting portion 1311 and a second limiting portion 1312. The first limiting portion 1311 is connected to the top wall of the housing 11 and abuts against the top surface 12a, or the first limiting portion 1311 is connected to the bottom wall of the housing 11 and abuts against the bottom surface 12b. The second limiting portion 1312 is connected to the side wall of the housing 11 and abuts against the outer surface 12c.

[0058] The shape of the outer surface 12c can be determined according to the shape of the battery cell 10. For example, when the battery cell 10 is a square, the outer surface 12c of the electrode assembly 12 is square; when the battery cell 10 is a circle, the outer surface 12c of the electrode assembly 12 is cylindrical.

[0059] The first limiting part 1311 and the second limiting part 1312 are connected or adjacent to each other. When the first limiting part 1311 and the second limiting part 1312 are connected, one end of the first limiting part 1311 and one end of the second limiting part 1312 are detachably or fixedly connected. In this embodiment, the first limiting part 1311 and the second limiting part 1312 are integrally formed and connected. When the first limiting part 1311 and the second limiting part 1312 are adjacent to each other, one end of the first limiting part 1311 and one end of the second limiting part 1312 are close to each other but not connected. Both the first limiting part 1311 and the second limiting part 1312 are detachably or fixedly connected to the inner wall of the housing 11. In this embodiment, both the first limiting part 1311 and the second limiting part 1312 are glued to the inner wall of the housing 11.

[0060] The first limiting part 1311 is detachably or fixedly connected to the top wall or bottom wall of the housing 11. In this embodiment, the first limiting part 1311 is bonded to the top wall or bottom wall of the housing 11 with adhesive. The first limiting part 1311 abuts against the top surface 12a or bottom surface 12b of the electrode assembly 12, forming a reliable axial limiting, so that the top surface 12a or bottom surface 12b of the electrode assembly 12 maintains a stable position within the housing 11 and reduces shaking.

[0061] The second limiting part 1312 is detachably or fixedly connected to the side wall of the housing 11. In this embodiment, the second limiting part 1312 is bonded to the side wall of the housing 11 with adhesive. The second limiting part 1312 abuts against the outer surface 12c of the electrode assembly 12, forming a reliable radial limiting, so that the outer surface 12c of the electrode assembly 12 maintains a stable position within the housing 11 and reduces shaking.

[0062] By defining the limiting member 131, which includes the first limiting part 1311 and the second limiting part 1312, the axial and radial limiting of the outer surface of the electrode assembly 12 can be achieved, ensuring that the top surface 12a, bottom surface 12b, and outer surface 12c of the electrode assembly 12 can maintain a stable position within the housing 11, reducing swaying. During the recycling process of the electrode assembly 12, the electrode assembly 12 can be easily removed by loosening or removing the first limiting part 1311 and the second limiting part 1312, maintaining the integrity of the electrode assembly 12 without damaging its structure or using solvents, significantly improving the recycling efficiency and reuse value of the electrode assembly 12.

[0063] In some embodiments, the electrode assembly 12 further includes an outer surface 12c located between the top surface 12a and the bottom surface 12b. The outer surface 12c is provided with a corner (not shown in the figure). A limiting member 131 is provided at the corner.

[0064] The corners on the outer surface 12c are related to the shape of the electrode assembly 12. When the electrode assembly 12 is square, the outer surface 12c of the electrode assembly 12 has four corners. The corners are formed by combining two adjacent sides. A limiting member 131 is provided at the corner to further enhance the radial limiting of the electrode assembly 12 and further enhance the stability of the electrode assembly 12.

[0065] In one specific embodiment, the outer surface 12c includes a first side surface (not shown in the figure), a second side surface (not shown in the figure), a third side surface (not shown in the figure), and a fourth side surface (not shown in the figure). The first and second side surfaces are arranged opposite each other along the length direction Z. The third and fourth side surfaces are arranged opposite each other along the width direction Y. A plurality of limiting members 131 abut against at least one of the following four locations: the corner position of the first and third side surfaces, the corner position of the second and third side surfaces, the corner position of the first and fourth side surfaces, and the corner position of the second and third side surfaces.

[0066] The first side is connected between one side of the third side and one side of the fourth side. The second side is connected between the other side of the third side and the other side of the fourth side. During the process of the multiple limiting members 131 abutting against the top surface 12a and the bottom surface 12b, some of the limiting members 131 may also abut against at least one of the following four locations: the corner position between the first and third sides, the corner position between the second and third sides, the corner position between the first and fourth sides, and the corner position between the second and fourth sides.

[0067] For example, when the limiting member 131 includes a first limiting part 1311 and a second limiting part 1312, the second limiting part 1312 can abut against at least one of the four corner positions. When the limiting member 131 is a foam layer 1315, the foam layer 1315 is connected to the inner wall of the housing 11 and abuts against at least one of the four corner positions.

[0068] When the battery cell 10 is square, the first, second, third, and fourth sides are all planar, and the four sides form a square outer side 12c. When the battery cell 10 is cylindrical, the first, second, third, and fourth sides are all arc-shaped, and the four arc-shaped surfaces form a circular outer side 12c.

[0069] By setting multiple limiting members 131 at the four corner positions of the outer side 12c, the electrode assembly 12 is mechanically fixed at multiple points within the housing 11, effectively preventing the electrode assembly 12 from shaking or shifting during use, and further improving the stability and service life of the electrode assembly 12.

[0070] In another specific embodiment, the limiting member 131 further includes a third limiting portion (not shown in the figure). The third limiting portion is connected to the first limiting portion 1311 and the second limiting portion 1312. The third limiting portion is connected to the inner wall of the housing 11 and abuts against the outer side surface 12c of the housing 11. The aforementioned limiting member 131 can cover at least one corner of the four corners of the electrode assembly 12. For example, the first limiting portion 1311 abuts against the bottom surface 12b of the electrode assembly 12, the second limiting portion 1312 abuts against the first side surface, and the third limiting portion abuts against the fourth side surface. Alternatively, the first limiting portion 1311 abuts against the top surface 12a of the electrode assembly 12, the second limiting portion 1312 abuts against the first side surface, and the third limiting portion abuts against the fourth side surface. The first limiting portion 1311, the second limiting portion 1312, and the third limiting portion may also have other abutment positions, which will not be described in detail here.

[0071] The limiting member 131 also includes a third limiting part, which can further improve the stability of the electrode assembly 12.

[0072] Please see Figure 6 , Figure 7 as well as Figure 8 , Figure 6 This is a structural schematic diagram of the third embodiment of the battery cell of this application; Figure 7 This is a cross-sectional schematic diagram of the third embodiment of the battery cell of this application; Figure 8 This is a cross-sectional schematic diagram of the fourth embodiment of the battery cell of this application. (In conjunction with...) Figures 1 to 5In some embodiments, the limiting component 13 includes a plurality of limiting members 131. The limiting member 131 includes a foam layer 1315. The foam layer 1315 is fixedly connected to the inner wall of the housing 11. The foam layer 1315 abuts against the outer surface of the electrode assembly 12.

[0073] The foam layer 1315 is made of foam. The foam layer 1315 not only effectively absorbs vibration and impact, improving the stability and service life of the electrode assembly 12, but also serves as a limiting function.

[0074] The foam layer 1315 is detachably or fixedly connected to the inner wall of the housing 11. In this embodiment, the foam layer 1315 is bonded to the top wall, bottom wall, and side wall of the housing 11 with adhesive. Multiple foam layers 1315 can abut against the top surface 12a, bottom surface 12b, and outer surface 12c of the electrode assembly 12. The foam layers 1315 can be integrally distributed or segmented, and this is not limited thereto.

[0075] By limiting the positioning member 131, which includes a foam layer 1315, the electrode assembly 12 is fixed relative to the housing 11, thereby improving the stability of the electrode assembly 12 and reducing manufacturing costs.

[0076] In some embodiments, the battery cell 10 includes a drying element 14. The drying element 14 is disposed within the housing 11.

[0077] The drying element 14 serves a drying function. The drying element 14 can be, but is not limited to, silica gel drying balls (not shown in the figure) and molecular sieve drying balls (not shown in the figure). In this embodiment, the drying element 14 is a silica gel drying ball, which has high hygroscopicity and stability, enabling the electrode assembly 12 to continuously absorb internal moisture during use.

[0078] The drying element 14 can be detachably or fixedly connected to the housing 11. For example, the drying element 14 can be filled between the inner wall of the housing 11 and the outer surface of the electrode assembly 12; or, the drying element 14 can be filled between the plurality of limiting members 131 and the outer surface of the electrode assembly 12.

[0079] By placing the drying element 14 inside the housing 11, it can continuously absorb moisture inside the battery cell 10, reducing the risk of the electrode assembly 12 getting damp during storage or use, thereby keeping the electrode assembly 12 dry during recycling and improving the reusability of the electrode assembly 12.

[0080] In some embodiments, such as Figures 2 to 5 As shown, a drying space 1313 is formed between the limiting component 13 and the electrode component 12. The drying component 14 is disposed within the drying space 1313.

[0081] The limiting component 13 may have a drying groove (not shown in the figure). During the process of the limiting component 13 abutting against the outer surface of the electrode assembly 12, a drying space 1313 is formed between the drying groove of the limiting component 13 and the outer surface of the electrode assembly 12. The drying space 1313 is a cavity structure that can accommodate the drying element 14.

[0082] By placing the drying element 14 within the drying space 1313 formed by the limiting component 13 and the electrode assembly 12, the limiting function and the drying function can be integrated. This not only reduces the use or cost of additional structures but also improves the recyclability and service life of the electrode assembly 12. At the same time, confining the drying element 14 within the limiting component 13 reduces the movement of the drying element 14, thereby reducing its impact on the electrode assembly 12.

[0083] In one specific embodiment, the drying element 14 is a drying ball. The drying ball rolls and abuts against the drying space 1313 between the limiting component 13 and the electrode assembly 12. By limiting the movement of the drying ball within the drying space 1313, the contact area between the drying ball and the electrode assembly 12 can be increased, further extending the time for continuous absorption of moisture inside the battery cell 10, and further reducing the risk of moisture absorption by the electrode assembly 12.

[0084] When the limiting component 13 includes a first limiting portion 1311 and a second limiting portion 1312, a drying groove may be provided on one side of the first limiting portion 1311 facing the outer surface of the electrode assembly 12; or, a drying groove may be provided on one side of the second limiting portion 1312 facing the outer surface of the electrode assembly 12. Alternatively, when the limiting component 13 includes a first sub-limiting portion 13111, a second sub-limiting portion 13112, a third sub-limiting portion 13121, and a fourth sub-limiting portion 13122, the first sub-limiting portion 13111, the second sub-limiting portion 13112, the third sub-limiting portion 13121, and the fourth sub-limiting portion 13122 surround and form the aforementioned drying groove. Alternatively, when the limiting component 13 includes a foam layer 1315, a drying groove is provided on one side of the foam layer 1315 facing the outer surface of the electrode assembly 12.

[0085] In one specific embodiment, the first limiting portion 1311 includes a first sub-limiting portion 13111 and a second sub-limiting portion 13112. The first sub-limiting portion 13111 is connected to the second sub-limiting portion 13112. The first sub-limiting portion 13111 is fixedly connected to the inner wall of the housing 11. One end of the second sub-limiting portion 13112 is connected to the first sub-limiting portion 13111, and the other end abuts against the bottom surface 12b or the top surface 12a.

[0086] By defining the first limiting part 1311, which includes the first sub-limiting part 13111 and the second sub-limiting part 13112, not only does the second sub-limiting part 13112 abut against the bottom surface 12b or the top surface 12a of the electrode assembly 12 to form a reliable limiting point, thereby keeping the electrode assembly 12 in a stable position within the housing 11 and reducing shaking, but it also provides an installation position for the subsequent drying component 14.

[0087] The second limiting part 1312 includes a third sub-limiting part 13121 and a fourth sub-limiting part 13122 connected to the third sub-limiting part 13121. The third sub-limiting part 13121 is fixedly connected to the inner wall of the housing 11. One end of the fourth sub-limiting part 13122 is connected to the third sub-limiting part 13121, and the other end abuts against the outer surface 12c.

[0088] By defining the second limiting part 1312, which includes the aforementioned third sub-limiting part 13121 and fourth sub-limiting part 13122, not only does the fourth sub-limiting part 13122 abut against the outer side 12c of the electrode assembly 12 to form a reliable limiting point, thus keeping the electrode assembly 12 in a stable position within the housing 11 and reducing shaking, but it also provides an installation position for the subsequent drying component 14.

[0089] When the limiting member 131 includes a first sub-limiting part 13111, a second sub-limiting part 13112, a third sub-limiting part 13121 and a fourth sub-limiting part 13122, the area of ​​the drying space 1313 is further increased, thereby increasing the filling volume of the drying member 14, and thus further extending the time for continuous absorption of moisture inside the battery cell 10.

[0090] Please see Figure 1 , Figure 2 , Figure 3 as well as Figure 8 In some embodiments, housing 11 includes a first housing 112 and a second housing 113. The first housing 112 and the second housing 113 are detachably connected. The limiting assembly 13 includes a plurality of limiting members 131. Some of the limiting members 131 are connected to the inner wall of the first housing 112. Some of the limiting members 131 are connected to the inner wall of the second housing 113.

[0091] The housing 11 is composed of a first housing 112 and a second housing 113. The first housing 112 and the second housing 113 may be connected by means of, but not limited to, snap-fit, plug-in, and bolts.

[0092] Some of the limiting components 131 are detachably or fixedly connected to the inner wall of the first housing 112. For example... Figure 3As shown, when the limiting member 131 includes a first limiting portion 1311 and a second limiting portion 1312, the first limiting portion 1311 and the second limiting portion 1312 in a portion of the limiting member 131 are both connected to the inner wall of the first housing 112; the first limiting portion 1311 and the second limiting portion 1312 in another portion of the limiting member 131 are both connected to the inner wall of the second housing 113. Figure 7 As shown, when the limiting member 131 is a foam layer 1315, a portion of the foam layer 1315 is connected to the inner wall of the first housing 112; another portion of the foam layer 1315 is connected to the inner wall of the second housing 113.

[0093] When the first housing 112 and the second housing 113 are connected, the multiple limiting members 131 located on the first housing 112 and the second housing 113 directly abut against the outer surface of the electrode assembly 12. When the first housing 112 and the second housing 113 are disconnected, the limiting members 131 directly separate from the outer surface 12c of the electrode assembly 12 during the disassembly process of the first housing 112 and the second housing 113, so that the electrode assembly 12 can be completely removed.

[0094] The housing 11 consists of two parts: a first housing 112 and a second housing 113. This improves the ease of assembly and disassembly of the electrode assembly 12, thereby increasing the recycling efficiency of the electrode assembly 12. In addition, the first housing 112 and the second housing 113 are detachably connected, which allows the limiting member 131 to more stably abut against the outer surface of the electrode assembly 12, thereby further reducing the risk of the electrode assembly 12 shaking.

[0095] In some embodiments, such as Figure 2 As shown, the battery cell 10 includes a heat-conducting element 15 and a heat-dissipating element 16. The heat-conducting element 15 is disposed between the electrode assembly 12 and the inner wall of the housing 11. The heat-dissipating element 16 is connected to the outer surface of the housing 11. The projected area of ​​the heat-dissipating element 16 on the housing 11 at least partially overlaps with the projected area of ​​the heat-dissipating element 16 on the housing 11.

[0096] The heat-conducting element 15 has a heat-conducting function. The heat-conducting element 15 may be, but is not limited to, a heat-conducting rod (not shown in the figure). The number of heat-conducting elements 15 may be, but is not limited to, one, two, or more than three. The heat-conducting element 15 is detachably or fixedly connected between the outer surface 12c of the electrode assembly 12 and the inner wall of the housing 11. The heat-conducting element 15 is used to conduct heat from the electrode assembly 12 to the housing 11.

[0097] The heat sink 16 has a thermal conductivity. The heat sink 16 can be, but is not limited to, a heat dissipation block (not shown in the figure). The heat sink 16 can be detachably or fixedly connected to the outer surface of the housing 11. The number of heat sinks 16 can be, but is not limited to, one, two, or more than three. The heat sink 16 is used to dissipate heat from the housing 11 to the external environment.

[0098] The projected area of ​​the heat-conducting component 15 on the housing 11 can be a first projected area (not shown in the figure). The projected area of ​​the heat sink 16 on the housing 11 can be a second projected area (not shown in the figure). The first projected area may partially coincide with the second projected area; or, the first projected area may completely coincide with the second projected area, which is not limited here.

[0099] The number of heat-conducting elements 15 and the number of heat-dissipating elements 16 may be the same or different. In this embodiment, four heat-conducting elements 15 are provided between the outer side 12c of the electrode assembly 12 and the inner wall of the housing 11; while two heat-dissipating elements 16 are provided on the outer side wall of the housing 11, and the projected area of ​​the two heat-conducting elements 15 on the housing 11 at least partially overlaps with the projected area of ​​the heat-dissipating elements 16 on the housing 11.

[0100] By defining the positional and area relationships of the heat-conducting component 15 and the heat-dissipating component 16 within the housing 11, the heat conduction path can be shortened, allowing the heat generated by the electrode assembly 12 to be quickly dissipated to the external environment of the housing 11. This effectively solves the problem of insufficient heat dissipation caused by heat accumulation in the electrode assembly 12 during operation, thereby reducing the performance degradation or safety risks caused by localized overheating of the electrode assembly 12. Through the combined action of the heat-conducting component 15 and the heat-dissipating component 16, the battery cell 10 maintains a suitable temperature during long-term charging and discharging, thus enhancing the safety and reliability of the battery cell 10.

[0101] Specifically, the inner wall of the housing 11 is provided with a heat-conducting groove (not shown in the figure). The heat-conducting component 15 is embedded in the heat-conducting groove, which not only improves the stability of the installation of the heat-conducting component 15, but also shortens the distance between the heat-conducting component 15 and the heat sink 16, thereby improving the heat conduction efficiency, etc.

[0102] The outer wall of the housing 11 is provided with a heat dissipation groove (not shown in the figure). The heat sink 16 is embedded in the heat dissipation groove, which not only improves the stability of the heat sink 16 installation, but also shortens the distance between the heat sink 16 and the heat conduction element 15, thereby improving heat dissipation efficiency. The projected area of ​​the heat conduction groove on the housing 11 at least partially coincides with the projected area of ​​the heat dissipation groove on the housing 11.

[0103] In some embodiments, such as Figure 1 As shown, the heat sink 16 includes at least two sub-heat sinks 161. The at least two sub-heat sinks 161 are detachably connected in a ring shape and fixedly sleeved on the outer surface of the housing 11, thereby locking the first housing 112 and the second housing 113.

[0104] The heat sink 16 is divided into at least two sub-heat sinks 161. The number of sub-heat sinks 161 may be, but is not limited to, two, three, or more than four. The sub-heat sinks 161 have a heat dissipation function.

[0105] During the process of combining the first housing 112 and the second housing 113 to form the housing 11, at least two sub-heat sinks 161 are connected to each other and fixedly sleeved on the outer surface of the housing 11, thereby locking the first housing 112 and the second housing 113.

[0106] During the recycling process of electrode assembly 12, the connection between at least two sub-heat sinks 161 is released. At this time, the first housing 112 and the second housing 113 are disassembled, and the limiting component 13 located on the first housing 112 and the second housing 113 is also released from the contact force with the outside of the electrode assembly 12, thereby realizing the recycling of electrode assembly 12.

[0107] By defining a heat sink 16 including at least two sub-heat sinks 161, not only can heat dissipation function be realized, allowing heat to be transferred to the external environment, but also a mechanical connection function can be realized, so that the first housing 112 and the second housing 113 are in a locked or unlocked state.

[0108] In one specific embodiment, a heat sink 16 includes two sub-heat sinks 161. One sub-heat sink 161 is detachably or fixedly connected to the outer surface of the first housing 112. The other sub-heat sink 161 is detachably or fixedly connected to the outer surface of the second housing 113.

[0109] During the process of the first housing 112 and the second housing 113 assembling to form housing 11, two sub-heat sinks 161 connect and lock the first housing 112 and the second housing 113. During the recycling of the electrode assembly 12, the two sub-heat sinks 161 are unlocked, at which point the first housing 112 and the second housing 113 are disassembled, realizing the recycling of the electrode assembly 12.

[0110] Specifically, the detachable connection between two adjacent sub-heat sinks 161 can be, but is not limited to, snap-fit, plug-in, and bolt connection. For example, one sub-heat sink 161 may have a first connecting hole (not shown in the figure) at both ends. The other sub-heat sink 161 may have a second connecting hole (not shown in the figure) at both ends. A fixing member (not shown in the figure) passes through the corresponding first and second connecting holes, allowing the two sub-heat sinks 161 to connect to each other. Through the combined action of the first connecting hole of one sub-heat sink 161, the second connecting hole of the other sub-heat sink 161, and the fixing member, the two sub-heat sinks 161 can be detachably connected, resulting in a simple structure that is easy to operate and install.

[0111] In this embodiment, the first connecting hole is a first threaded hole (not shown in the figure), the second connecting hole is a second threaded hole (not shown in the figure), and the fixing member is a fixing bolt (not shown in the figure). The fixing bolt is sequentially threaded into the corresponding first threaded hole and second threaded hole, making the two sub-heat sinks 161 detachably connected, simplifying the structure and making it easier to operate and install. During the recovery process of the electrode assembly 12, the first housing 112 and the second housing 113 can be quickly separated by loosening the fixing bolts between the sub-heat sinks 161, improving the recovery efficiency and reuse rate of the electrode assembly 12.

[0112] In one specific embodiment, when the battery cell 10 is arranged in a square shape, the housing 11 is divided into a first housing 112 and a second housing 113 in the width direction Y. A sub-heat sink 161 is connected to the first housing 112 at its middle portion along the length direction Z, and both ends of the sub-heat sink 161 are connected to the first housing 112 at their respective ends along the width direction Y. Another sub-heat sink 161 is connected to the second housing 113 at its middle portion along the length direction Z, and both ends of the other sub-heat sink 161 are connected to the second housing 113 at their respective ends along the width direction Y. A first connecting hole and a second connecting hole extend along the width direction Y, and a fixing member is connected to the corresponding first connecting hole and second connecting hole along the width direction Y.

[0113] When the limiting component 13 axially limits the top surface 12a and bottom surface 12b of the electrode assembly 12, by limiting the specific combination position of the first housing 112 and the second housing 113, when the two sub-heat sinks 161 are connected to each other, the outer side surface 12c of the electrode assembly 12 can be radially limited, thereby achieving overall limiting of the outer surface of the electrode assembly 12.

[0114] When the first housing 112 and the second housing 113 are detachable and lockable, the number of limiting components 13 inside the housing 11 can be reduced, thereby reducing costs, etc.

[0115] In other embodiments, the heat sink 16 may also include one or more sub-heat sinks 161. The sub-heat sinks 161, the first sub-heat sink 161 and the second sub-heat sink 161 are connected end to end in a ring shape and fixedly surrounded on the outer surface of the housing 11.

[0116] Please see Figure 4 , Figure 5 , Figure 6 as well as Figure 7In some embodiments, the housing 11 includes an outer cylinder 114, a first cover 115, and a second cover 116. The first cover 115 is connected to one end of the outer cylinder 114. The second cover 116 is connected to the other end of the outer cylinder 114. The limiting assembly 13 includes a plurality of limiting members 131. Some of the limiting members 131 are connected to the inner surface of the first cover 115. Some of the limiting members 131 are connected to the inner surface of the second cover 116. The first cover 115 abuts against the top surface 12a of the electrode assembly 12. The second cover 116 abuts against the bottom surface 12b of the electrode assembly 12.

[0117] The outer cylinder 114 is a cylindrical structure with openings at both ends. The cross-sectional shape of the outer cylinder 114 along the direction perpendicular to its height (X) can be circular or square. The cross-sectional shape of the outer cylinder 114 corresponds to the shapes of the first cover 115 and the second cover 116. When the cross-sectional shape of the outer cylinder 114 along the direction perpendicular to its height (X) is circular, the outer cylinder 114 is cylindrical, and both the first cover 115 and the second cover 116 are circular.

[0118] The first cover 115 is detachably or fixedly connected to one end of the outer cylinder 114. A partial limiting member 131 is detachably or fixedly connected to the inner surface of the first cover 115. The second cover 116 is detachably or fixedly connected to the other end of the outer cylinder 114. A partial limiting member 131 is detachably or fixedly connected to the inner surface of the second cover 116.

[0119] When the first cover 115 is connected to one end of the outer cylinder 114, a portion of the limiting member 131 on the first cover 115 abuts against the top surface 12a of the electrode assembly 12. When the second cover 116 is connected to the other end of the outer cylinder 114, a portion of the limiting member 131 on the second cover 116 abuts against the bottom surface 12b of the electrode assembly 12.

[0120] like Figure 4 and Figure 5 As shown, when the limiting member 131 includes a first limiting part 1311 and a second limiting part 1312, the inner surface of the first cover 115 is connected to the first limiting part 1311, and the first limiting part 1311 abuts against the top surface 12a of the electrode assembly 12. The inner wall of the outer cylinder 114 is not connected to the second limiting part 1312. The inner surface of the second cover 116 is connected to the first limiting part 1311, and the first limiting part 1311 abuts against the bottom surface 12b of the electrode assembly 12. The inner wall of the outer cylinder 114 is not connected to the second limiting part 1312.

[0121] like Figure 7As shown, when the limiting member 131 includes a foam layer 1315, multiple foam layers 1315 are respectively connected to the inner surfaces of the first cover 115 and the second cover 116. The foam layer 1315 located on the first cover 115 abuts against the top surface 12a of the electrode assembly 12; the foam layer 1315 located on the second cover 116 abuts against the bottom surface 12b of the electrode assembly 12.

[0122] Through the combined action of the outer cylinder 114, the first cover 115, the second cover 116 and multiple limiting members 131, when the electrode assembly 12 needs to be recycled, the first cover 115 and the second cover 116 can be removed, and the contact relationship between the limiting members 131 and the electrode assembly 12 can be easily separated, which can improve the recycling efficiency and reuse value of the electrode assembly 12.

[0123] In some embodiments, such as Figure 7 As shown, the battery cell 10 is cylindrical. A first threaded member 117 and a second threaded member 118 are provided inside the outer cylinder 114. The first threaded member 117 is connected to the inner surface of the first cover 115. A limiting member 131 is connected to the surface of the first threaded member 117 away from the first cover 115. The second threaded member 118 is connected to the inner surface of the second cover 116. The limiting member 131 is connected to the surface of the second threaded member 118 away from the second cover 116. The first threaded member 117 is threaded to one end of the outer cylinder 114, causing the limiting member 131 to abut against the top surface 12a of the electrode assembly 12. The second threaded member 118 is threaded to the other end of the outer cylinder 114, causing the limiting member 131 to abut against the bottom surface 12b of the electrode assembly 12.

[0124] When the battery cell 10 is cylindrical, the outer cylinder 114 is cylindrical, and the first cover 115, the second cover 116, the first threaded part 117 and the second threaded part 118 are all circular.

[0125] The first threaded component 117 is located on the inner surface of the first cover 115, and the outer surface of the first threaded component 117 is detachably or fixedly connected to the inner surface of the first cover 115. For example, the outer surface of the first threaded component 117 may be welded or bonded to the inner surface of the first cover 115. The limiting component 131 is detachably or fixedly connected to the inner surface of the first threaded component 117. In one specific embodiment, the limiting component 131 is a foam layer 1315, which is bonded to the inner surface of the first threaded component 117 with adhesive. In another specific embodiment, the limiting component 131 is a first limiting part 1311 and a second limiting part 1312, where the first limiting part 1311 is bonded to the inner surface of the first threaded component 117 with adhesive, and the second limiting part 1312 is not connected to other structures.

[0126] The first threaded component 117 is threaded to one end of the outer cylinder 114. The outer edge of the first threaded component 117 is provided with a first external thread (not shown in the figure), and the inner side wall of one end of the outer cylinder 114 is provided with a first internal thread (not shown in the figure). The first external thread of the first threaded component 117 and the first internal thread of the outer cylinder 114 are threaded together.

[0127] When the user rotates the first cover 115, the first cover 115 drives the first threaded component 117 to be screwed into or out of the outer cylinder 114, causing the multiple limiting members 131 of the first threaded component 117 to abut against or move away from the top surface 12a of the outer cylinder 114. At this time, the first cover 115 not only facilitates the user's rotation operation, but also limits the screwing depth of the first threaded component 117.

[0128] Similarly, the second threaded component 118 is located on the inner surface of the second cover 116, and the outer surface of the second threaded component 118 is detachably or fixedly connected to the inner surface of the second cover 116. For example, the outer surface of the second threaded component 118 can be welded or bonded to the inner surface of the second cover 116. The limiting component 131 is detachably or fixedly connected to the inner surface of the second threaded component 118. In this embodiment, the limiting component 131 can be connected to the inner surface of the second threaded component 118 by means of glue or the like.

[0129] The second threaded component 118 is threaded to the other end of the outer cylinder 114. If the outer edge of the second threaded component 118 is provided with a second external thread (not shown in the figure), and the inner side wall of the other end of the outer cylinder 114 is provided with a second internal thread (not shown in the figure), the second external thread of the second threaded component 118 and the second internal thread of the outer cylinder 114 are threadedly connected.

[0130] When the user rotates the second cover 116, the second cover 116 drives the second threaded component 118 to screw into or out of the other end of the outer cylinder 114, causing the multiple limiting members 131 of the second threaded component 118 to abut against or move away from the bottom surface 12b of the outer cylinder 114. At this time, the second cover 116 not only facilitates the user's rotation operation, but also limits the screw-in or screw-out depth of the second threaded component 118.

[0131] The first threaded part 117 and the second threaded part 118 are provided inside the outer cylinder 114, which not only improves the convenience of disassembling and assembling the limiting part 131 without the need for additional tools or destructive operations, thereby improving the recycling efficiency of the electrode assembly 12; but also strengthens the first cover 115 and the second cover 116, thereby reducing the risk of damage to the first cover 115 and the second cover 116; at the same time, it also allows the limiting part 131 to stably abut against the outer surface of the electrode assembly 12, further reducing the risk of the electrode assembly 12 shaking or displacement.

[0132] Please see Figure 9 , Figure 9 This is a top view of the first cover in the third embodiment of the battery cell of this application. Combined with... Figures 1 to 8 In some embodiments, the outer surface of the first cover 115 is provided with a first reinforcing rib 1151. And / or, the outer surface of the second cover 116 is provided with a second reinforcing rib (not shown in the figure).

[0133] The first reinforcing rib 1151 is detachably or fixedly connected to the outer surface of the first cover 115. The number of first reinforcing ribs 1151 can be, but is not limited to, one, two, or more than three. The arrangement of the first reinforcing ribs 1151 depends on the shape of the first cover 115. For example, when the first cover 115 is circular, multiple first reinforcing ribs 1151 can be arranged radially. As in this embodiment, multiple first reinforcing ribs 1151 are evenly radially distributed along the circumferential direction on the outer surface of the first cover 115. Furthermore, the first reinforcing ribs 1151 can be, but are not limited to, a first shape memory alloy.

[0134] And / or, the second reinforcing rib is detachably or fixedly connected to the outer surface of the second cover 116. The number of second reinforcing ribs may be, but is not limited to, one, two, or more than three. The arrangement of the second reinforcing ribs depends on the shape of the second cover 116. For example, when the second cover 116 is circular, multiple second reinforcing ribs may be arranged radially. As in this embodiment, multiple second reinforcing ribs are evenly radially distributed along the circumferential direction on the outer surface of the second cover 116. In addition, the second reinforcing ribs may be, but are not limited to, a second shape memory alloy.

[0135] The first reinforcing rib 1151 can increase the strength of the first cover 115, thereby increasing the strength of the shell 11 and reducing the risk of deformation of the shell 11 due to external forces. And / or, the second reinforcing rib can increase the strength of the second cover 116, thereby increasing the strength of the shell 11 and reducing the risk of deformation of the shell 11 due to external forces.

[0136] In some embodiments, the battery cell 10 is in the form of a square or a cylinder.

[0137] When the battery cell 10 is square, the shape of the casing 11 and the shape of the electrode assembly 12 can be cuboid or cube. Alternatively, when the battery cell 10 is cylindrical, the shape of the casing 11 and the shape of the electrode assembly 12 can both be cylindrical.

[0138] By defining the shape of the battery cell 10, the versatility of the limiting component 13 can be improved, thereby increasing the recycling rate of the electrode component 12.

[0139] In a specific application scenario, the battery cell 10 includes a housing 11, an electrode assembly 12, and a limiting assembly 13. The electrode assembly 12 is located inside the housing 11. The limiting assembly 13 is connected to the inner wall of the housing 11. The limiting assembly 13 abuts against the outer surface of the electrode assembly 12 to fix the electrode assembly 12 relative to the housing 11. The limiting assembly 13 includes multiple limiting members 131. The limiting member 131 includes a first limiting portion 1311 and a second limiting portion 1312; or, the limiting member 131 is a foam layer 1315.

[0140] Please see Figure 10 , Figure 10 This is an exploded view of a battery device according to one or more embodiments. (In conjunction with...) Figures 1 to 9 This application provides a battery device. The battery device 100 includes the aforementioned battery cell 10.

[0141] It should be noted that the battery cell 10 in this embodiment is the same as the battery cell 10 described in the above embodiments, and will not be repeated here. The battery device 100 includes the aforementioned battery cell 10. When the electrode assembly 12 needs to be recycled, the electrode assembly 12 can be reused by releasing the contact relationship between the limiting component 13 and the electrode assembly 12. This solves the problem that the electrode assembly 12 is difficult to separate during the recycling process due to adhesive bonding, thereby enabling convenient disassembly and efficient recycling of the electrode assembly 12.

[0142] In some embodiments, the battery device 100 further includes a first housing 20 and a second housing 30. The first housing 20 and the second housing 30 are capable of accommodating battery cells 10. The battery cell 10 can be a rechargeable battery. A rechargeable battery refers to a battery cell 10 that can be recharged to activate its active materials and continue to be used after being discharged. The battery cell 10 can include, but is not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, and lead-acid batteries.

[0143] Please see Figure 11 , Figure 11 This is a structural schematic diagram of an electrical device according to one or more embodiments. (In conjunction with...) Figures 1 to 10 This application provides an electrical device. The electrical device (not shown in the figure) includes the battery device 100 described above.

[0144] It should be noted that the battery device 100 in this embodiment is the same as the battery device 100 described in the above embodiments, and will not be repeated here. Using the battery device 100, when the electrode assembly 12 needs to be recycled, the limiting component 13 can be released from contact with the electrode assembly 12 to reuse the electrode assembly 12. This solves the problem of the electrode assembly 12 being difficult to separate due to adhesive bonding during recycling, thus enabling convenient disassembly and efficient recycling of the electrode assembly 12.

[0145] In some embodiments, the electrical device further includes a device body (not shown in the figures). A battery device 100 is disposed on the device body. The battery device 100 is used to supply power to the electrical components 200 of the device body, enabling the device body to operate. It should be noted that the battery device 100 in this embodiment is the same as the battery device 100 described in the above embodiments, and will not be repeated here. By using the above-described battery device 100, the electrical device can reduce the internal space occupied by the battery device 100, thereby improving the high energy and high density requirements of the battery cells 10.

[0146] The aforementioned electrical device 200 can be any component capable of consuming electricity. For example, the electrical device 200 can be a controller and electronic components, such as a central processing unit (CPU), digital signal processor (DSP), application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0147] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles. Spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers. For ease of explanation, the following examples use vehicles as an example of electrical equipment.

[0148] In some examples, the electrical device can be a vehicle. The main body of the device can be a vehicle frame. The battery device 100 is mounted on the vehicle frame. The electrical component 200 can be the vehicle's lights (e.g., headlights, taillights, etc.), display screen, dashboard, control system (e.g., controller), etc. The electrical component 200 is mounted on the vehicle body.

[0149] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, characterized in that, include: case; The electrode assembly is located within the housing; A limiting component is connected to the inner wall of the housing, and the limiting component abuts against the outer surface of the electrode assembly; When the electrode assembly is recycled, the limiting assembly is disassembled as a whole with the housing.

2. The battery cell according to claim 1, characterized in that, The electrode assembly includes a top surface and a bottom surface that are disposed opposite to each other along the height direction; The limiting assembly includes multiple limiting members, which are connected to the inner wall of the housing. Some of the limiting members abut against the top surface, and / or some of the limiting members abut against the bottom surface.

3. The battery cell according to claim 2, characterized in that, The electrode assembly further includes an outer surface located between the top surface and the bottom surface; the limiting member includes a first limiting part and a second limiting part; the first limiting part is connected to the top wall of the housing and abuts against the top surface, or the first limiting part is connected to the bottom wall of the housing and abuts against the bottom surface; The second limiting part is connected to the side wall of the housing and abuts against the outer side.

4. The battery cell according to claim 2, characterized in that, The electrode assembly also includes an outer side surface located between the top surface and the bottom surface; the outer side surface is provided with a corner, and the corner is provided with the limiting member.

5. The battery cell according to claim 1, characterized in that, The limiting component includes multiple limiting members, each limiting member including a foam layer, the foam layer being fixedly connected to the inner wall of the housing, and the foam layer abutting against the outer surface of the electrode assembly.

6. The battery cell according to claim 1, characterized in that, The battery cell includes a drying element, which is disposed inside the housing.

7. The battery cell according to claim 6, characterized in that, A drying space is formed between the limiting component and the electrode component, and the drying element is disposed within the drying space.

8. The battery cell according to any one of claims 1 to 7, characterized in that, The housing includes a first housing and a second housing, which are detachably connected. The limiting assembly includes multiple limiting members, some of which are connected to the inner wall of the first housing and some of which are connected to the inner wall of the second housing.

9. The battery cell according to claim 8, characterized in that, The battery cell includes a heat-conducting component and a heat-dissipating component. The heat-conducting component is disposed between the electrode assembly and the inner wall of the housing, and the heat-dissipating component is connected to the outer surface of the housing. The projected area of ​​the heat-dissipating component on the housing at least partially overlaps with the projected area of ​​the heat-dissipating component on the housing.

10. The battery cell according to claim 9, characterized in that, The heat dissipation component includes at least two sub-heat dissipation components, which are detachably connected in a ring shape and fixedly sleeved on the outer surface of the housing, thereby locking the first housing and the second housing.

11. The battery cell according to any one of claims 1 to 7, characterized in that, The housing includes an outer cylinder, a first cover, and a second cover. The first cover is connected to one end of the outer cylinder, and the second cover is connected to the other end of the outer cylinder. The limiting component includes multiple limiting members, some of which are connected to the inner surface of the first cover body and some of which are connected to the inner surface of the second cover body. The first cover abuts a portion of the limiting member against the top surface of the electrode assembly; the second cover abuts a portion of the limiting member against the bottom surface of the electrode assembly.

12. The battery cell according to claim 11, characterized in that, The battery cell is cylindrical; the outer cylinder is provided with a first threaded component and a second threaded component, the first threaded component is connected to the inner surface of the first cover, and the limiting component is connected to the surface of the first threaded component away from the first cover; the second threaded component is connected to the inner surface of the second cover, and the limiting component is connected to the surface of the second threaded component away from the second cover. The first threaded component is threaded to one end of the outer cylinder, and the limiting component abuts against the top surface of the electrode assembly; the second threaded component is threaded to the other end of the outer cylinder, and the limiting component abuts against the bottom surface of the electrode assembly.

13. The battery cell according to claim 11, characterized in that, The outer surface of the first cover is provided with a first reinforcing rib; And / or, the outer surface of the second cover is provided with a second reinforcing rib.

14. The battery cell according to claim 1, characterized in that, The battery cell is square or cylindrical.

15. A battery device, characterized in that, Includes the battery cell as described in any one of claims 1 to 14.

16. An electrical appliance, characterized in that, Includes the battery device as described in claim 15.

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