Housings, battery cells, batteries, and power consumption devices

Abstract

Embodiments of the present application provide a housing, a battery cell, a battery, and an electric power consuming device, and relate to the field of battery technologies. The housing includes a housing body and two end caps. The housing body includes two openings provided opposite to each other along a first direction. Along the first direction, the two end caps are respectively connected to both ends of the housing body, seal the two openings respectively, and together with the housing body surround to form a housing space for accommodating an electrode assembly. By having the two openings in the housing body, the housing encapsulation of the electrode assembly is made more convenient, the risk of damage caused by excessive friction between the electrode assembly and the inner surface of the housing body during housing encapsulation is reduced, and the yield of the housing encapsulation of the electrode assembly is increased.

Description

Technical Field

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[0001] This application relates to the field of battery technology, and more specifically, to a housing, a battery cell, a battery, and an electric power consumption device.

[0002] (Cross-reference to Related Applications) This application claims the priority of Chinese Patent Application No. 202222730292.7, titled "Housing, Battery Cell, Battery, and Electric Power Consumption Device", filed on October 17, 2022, and all the contents of this application are incorporated herein by reference.

Background Art

[0003] [[ID=·17]] With the development of new energy technologies, batteries are widely applied to electric power consumption devices such as electric bicycles, electric vehicles, electric aircraft, and electric ships.

[0004] The manufacturing process of a battery cell includes a housing encapsulation process of assembling an electrode assembly into a housing.Former housings make it difficult to assemble the electrode assembly into the case, reducing the yield of housing encapsulation of the electrode assembly.Therefore, improving the yield of housing encapsulation of the electrode assembly is an urgent technical problem to be solved in battery manufacturing technology.

Summary of the Invention

[0005] The objective of this application is to provide a housing, a battery cell, a battery, and an electric power consumption device that can improve the yield of housing encapsulation of the electrode assembly.

[0006] In a first aspect, embodiments of this application provide a housing including a housing body and two end caps.The housing body includes two openings provided opposite to each other along a first direction.Along the first direction, the two end caps are respectively connected to both ends of the housing body, respectively sealing the two openings, and surrounding together with the housing body to form an accommodation space for accommodating the electrode assembly.

[0007] In the above proposed technology, the housing has two openings, increasing the degree of openness of the housing. When assembling the electrode assembly into the housing, the working space is increased, making it easier to enclose the electrode assembly in the housing and improving the yield of electrode assembly housing enclosure. On the other hand, when assembling the electrode assembly into the housing through one opening, the housing enclosure status of the electrode assembly can be clearly observed through the other opening, allowing for adjustment of the electrode assembly's position. Furthermore, the risk of damage due to excessive friction between the electrode assembly and the inner surface of the housing during housing enclosure is reduced, further improving the yield of electrode assembly housing enclosure.

[0008] In some embodiments, the housing includes a plurality of side walls whose ends are sequentially connected, and the plurality of side walls enclose two openings, the area of ​​which is greater than the area of ​​the outer surface of each side wall.

[0009] In the above proposed technology, since the area of ​​the opening is larger than the area of ​​the outer surface of each side wall, the opening is formed on the side wall with the largest surface area of ​​the housing, making it easier to insert the electrode assembly into the housing.

[0010] In some embodiments, the multiple side walls include a first side wall, a second side wall, a third side wall, and a fourth side wall, whose ends are connected sequentially. Along the second direction, the first and third side walls are arranged opposite each other. Along the third direction, the second and fourth side walls are arranged opposite each other. The first, second, and third directions are perpendicular to each other in pairs.

[0011] In the above proposed technology, the first, second, third, and fourth side walls form a rectangular housing. A rectangular housing facilitates the stacking of multiple battery cells to form a battery pack, increasing space utilization. Furthermore, a rectangular housing has a simple structure and is easy to process and manufacture.

[0012] In some embodiments, a first edge portion is provided along a first direction, surrounding an opening at at least one end of the housing, and the first edge portion is used to connect to an end cap.

[0013] In the above proposed technology, the first edge increases the contact area between the housing and the end cap, further enhancing the connection strength between the housing and the end cap.

[0014] In some embodiments, a first edge portion is provided at both ends of the housing along a first direction, and two end caps are each connected to two first edge portions.

[0015] In the above proposed technology, the two first edge portions enhance the connection strength when the two end caps are connected to the housing.

[0016] In some embodiments, the first edge portion protrudes from the outer surface of the housing, or the first edge portion protrudes from the inner surface of the housing.

[0017] In the above proposed technology, if the first edge portion protrudes from the outer surface of the housing, the connection point between the end cap and the housing is located outside the housing, reducing the space occupied by the housing's internal dimensions, allowing a larger electrode assembly to be housed inside the housing, and increasing the energy density of the battery cell. If the first edge portion protrudes from the inner surface of the housing, the contour of the housing formed by the housing and the two end caps becomes more regular, making it easier to stack multiple battery cells.

[0018] In some embodiments, a protrusion is provided on the surface of the end cap facing the housing along a first direction, and the protrusion is positioned to be at least partially located within the housing and to fit into the housing.

[0019] In the above proposed technology, the protrusion enhances the structural strength of the end cap while also providing a positioning effect on the end cap, making it easier for the end cap to cover the opening of the housing.

[0020] In some embodiments, at least one end cap is provided with a second edge portion, the second edge portion is provided so as to surround the edge of the end cap, and along the first direction, the second edge portion protrudes from the surface of the end cap toward the housing, and the second edge portion is used to connect to the housing.

[0021] In the above proposed technology, the second edge increases the connection area between the housing and the end cap, further enhancing the connection strength between the housing and the end cap. At the same time, the second edge provides a positioning effect on the end cap, making it easier for the end cap to cover the opening of the housing.

[0022] In some embodiments, a second edge portion is provided on both of the two end caps.

[0023] In the above proposed technology, a second edge portion is provided on both of the two end caps, thereby increasing the structural strength of the housing formed by the two end caps and the housing.

[0024] In some embodiments, the second edge portion is connected to the outer surface of the housing, or the second edge portion is connected to the inner surface of the housing.

[0025] In the above proposed technology, when the second edge is connected to the outer surface of the housing, the space occupied by the housing is reduced, allowing a larger electrode assembly to be housed inside the housing, thereby increasing the energy density of the battery cell. When the second edge is connected to the inner surface of the housing, the contour of the housing formed by the housing and the two end caps becomes more regular, making it easier to stack multiple battery cells.

[0026] In some embodiments, the housing has an inner surface, an outer surface and two end faces. The inner surface and the outer surface are provided opposite to each other. The two end faces are provided opposite to each other along a first direction. The two end caps are respectively connected to the two end faces, and the end faces connect the inner surface and the outer surface. The distance between the inner surface and the outer surface is L1. Along the first direction, the end cap has a connecting portion overlapping with the end face, and the thickness of the connecting portion is L2, and L1 > L2.

[0027] In the above technical solution, when L1 > L2, since the thickness of the housing increases, the structural strength of the housing is enhanced. On the other hand, the contact area of the connection portion between the end cap and the housing increases, and the connection strength between the housing and the end cap is enhanced.

[0028] In some embodiments, the thickness of the end cap is D1, and the thickness of the housing is D2, satisfying 50μm ≤ D1 ≤ 200μm, and / or 50μm ≤ D2 ≤ 200μm.

[0029] In the above technical solution, when the thickness D1 of the end cap satisfies 50μm ≤ D1 ≤ 200μm, the strength of the end cap is enhanced, and at the same time, the internal volume of the housing formed by the end cap and the housing increases. When the thickness D2 of the housing satisfies 50μm ≤ D2 ≤ 200μm, the strength of the housing is enhanced, and at the same time, the internal volume of the housing formed by the end cap and the housing increases.

[0030] In some embodiments, the housing and / or the end cap includes stainless steel. [[ID=??]]

[0031] In the above technical solution, the steel material has good physical stability and good pressure resistance performance. When the housing and / or the end cap is manufactured with the steel material, the structural strength of the housing is enhanced.

[0032] In some embodiments, the end cap is welded to the housing.

[0033] It seems there is a typo in ID=? where it says "

[0031] " instead of a proper ID number. I've left it as it is in the translation. If you meant something else, please correct it and let me know.In the above proposed technology, the connection between the end cap and the housing by welding has the advantage of high connection strength, while after welding, the contour of the connection point between the end cap and the housing becomes regular, without forming large protrusions, and the outer contour of the housing becomes regular.

[0034] In a second embodiment, an embodiment of the present application provides a battery cell comprising the housing and an electrode assembly in the above embodiment. The electrode assembly is housed within the housing.

[0035] In some embodiments, the housing has a wall portion, and the wall portion First A drawer hole is provided. First The extraction hole penetrates the wall along the thickness direction of the wall. The battery cell further includes electrode terminals, which are electrically connected to the electrode assembly, and the electrode terminals include a terminal body, a first restricting portion and a second restricting portion, and the terminal body is First The first and second restricting portions are drilled within the pull-out hole and are connected to both ends of the terminal body, respectively, along the thickness direction of the wall. The first and second restricting portions are located on both sides of the wall, respectively, to secure the terminal body.

[0036] In the above proposed technology, the terminal body is used to extract electrical energy from the electrode assembly from the housing. The terminal body is fixed to the wall by the action of the first and second restricting parts, eliminating the need to weld the terminal body to the wall and reducing the risk of damage to the housing structure due to melting during welding.

[0037] In some embodiments, the battery cell further includes a current collector that connects electrode terminals to an electrode assembly. The current collector is provided with a second lead hole, the terminal body is drilled into the second lead hole, and along the thickness direction of the wall, the first restrictor is located within the housing, and the current collector is located at least partially between the first restrictor and the wall.

[0038] In the above proposed technology, the current collector is used to electrically connect the electrode terminal and the electrode assembly. The current collector is fixed to the electrode terminal by sandwiching it between the first restricting portion and the wall portion, thereby simplifying the assembly process and increasing manufacturing efficiency.

[0039] In a third embodiment, the embodiment of the present application provides a battery including the battery cell in the above embodiment.

[0040] In a fourth embodiment, the embodiment of the present application provides a power consumption device including the battery in the above embodiment.

[0041] The above description is merely an overview of the technical solution of the present application. In order to better understand the technical means of the present application, and to enable implementation according to the contents of the specification, and to make the above and other objectives, features, and benefits of the present application clearer and easier to understand, specific embodiments of the present application are given below. [Brief explanation of the drawing]

[0042] After reading the detailed description of the preferred embodiments below, various other advantages and benefits will become apparent to those skilled in the art. The drawings are for illustrative purposes only and are not intended to be limitations on the present application. In addition, the same reference numerals represent the same components in all drawings. [Figure 1] This is a schematic diagram of the structure of a vehicle provided by some embodiments of the present invention. [Figure 2] This is an exploded view of a battery provided by some embodiments of the present application. [Figure 3] This is a schematic diagram of the structure of a housing provided by some embodiments of the present application. [Figure 4] This is an exploded view of the housing provided by some embodiments of the present application. [Figure 5] This is a schematic diagram of the structure of the enclosure provided by some embodiments of the present application. [Figure 6] This is an exploded view of a housing provided with a first edge portion, as provided in several embodiments of the present application. [Figure 7] This is a schematic diagram illustrating the installation of the first edge portion provided by several embodiments of the present application. [Figure 8] This is an enlarged view of area A in Figure 7. [Figure 9] This is a schematic diagram illustrating the installation of the first edge portion, as provided by some other embodiments of the present application. [Figure 10] This is a magnified view of area B in Figure 9. [Figure 11] This is a schematic diagram illustrating the installation of the protrusions provided by several embodiments of the present application. [Figure 12] This is a magnified view of area C in Figure 11. [Figure 13] This is an exploded view of a housing provided with a second edge portion, as provided in several embodiments of the present application. [Figure 14] This is an enlarged view of section D in Figure 13. [Figure 15] This is a schematic diagram of the fitting of an end cap and housing provided by several embodiments of the present application. [Figure 16] This is a magnified view of point E in Figure 15. [Figure 17] This is a schematic diagram of the structure of a thickened enclosure provided by some embodiments of the present application. [Figure 18] This is a magnified view of area F in Figure 17. [Figure 19] This is a schematic diagram of the fitting of the housing and end cap provided by some embodiments of the present application. [Figure 20] This is a magnified view of area G in Figure 19. [Figure 21] This is a schematic diagram of the structure of an electrode terminal provided by some embodiments of the present application. [Modes for carrying out the invention]

[0043] The following examples of embodiments of the technical solution of this application will be described in detail with reference to the drawings. The following embodiments are merely for the purpose of clarifying the technical solution of this application and should not be used as examples to limit the scope of protection of this application.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art. Terms used herein are for illustrative purposes only and are not intended to limit this application. The terms “including,” “having,” and any variations thereof in the description, claims, and drawings of this application are intended to cover the non-exclusive “including.”

[0045] In the description of embodiments of this application, technical terms such as “first,” “second,” etc., are used solely to distinguish different subjects and should not be understood as indicating or implying relative importance, or suggesting the number, specific order, or primary / secondary relationship of the technical features being referred to. In the description of embodiments of this application, unless otherwise clearly and specifically limited, “plural” means two or more.

[0046] Where the “Examples” are referred to herein, it means that certain features, structures, or characteristics described in conjunction with the Examples may be included in at least one Example of the Application. The use of this term in each part of the Specification does not necessarily refer to the same Example, nor do they constitute separate or alternative embodiments that are mutually exclusive with the other Examples. Those skilled in the art will understand, both expressly and implicitly, that the Examples described herein can be combined with other Examples.

[0047] In the description of the embodiments of this application, the term "and / or" merely describes the relationship between related objects, and indicates that there may be three possible relationships. For example, A and / or B can represent three cases: A alone, A and B as a combination, and B alone. In this specification, the letter " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0048] In the description of the embodiments of this application, the term "multiple" refers to two or more, similarly, "multiple groups" refers to two or more groups, and "multiple sheets" refers to two or more sheets.

[0049] In the description of the embodiments of this application, the orientations or positional relationships indicated by technical terms such as "center," "vertical direction," "horizontal direction," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" are based on the orientations or positional relationships shown in the drawings and are merely for the purpose of making the embodiments of this application easier to explain and simplifying the explanation. They do not indicate or imply that the indicated device or element necessarily has a specific orientation, or that it is configured and operates in a specific orientation, and therefore should not be understood as limiting the embodiments of this application.

[0050] In the description of the embodiments of this application, unless otherwise explicitly defined and limited, technical terms such as "attach," "connect," "connect," and "fix" should be understood in a broad sense. For example, a fixed connection may be a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or an internal communication between two elements or an interaction relationship between two elements. A person skilled in the art will be able to understand the specific meaning of the above terms in the embodiments of this application, depending on the specific circumstances.

[0051] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the dimensions of each component, such as thickness, length, and width, in the embodiments of this application shown in the drawings, as well as the overall dimensions of the integrating device, are illustrative only and do not impose any limitations on this application.

[0052] A typical battery cell usually includes components such as a case, electrode assemblies, and end cap assemblies. The case has an opening, and during the assembly process of the battery cell, the electrode assemblies are fed into the case through this opening. The electrode assemblies are housed within the case, and the end caps cover the openings of the case to isolate the internal environment of the battery cell from the external environment.

[0053] Because the opening is usually made in one side wall of the case, during the process of housing the electrode assembly, firstly, the small size of the opening makes it difficult to assemble the electrode assembly into the case. Secondly, because the case has only one opening, it is difficult to determine whether the electrode assembly is aligned with the opening during housing encapsulation. If the electrode assembly is not aligned with the opening, friction occurs between the electrode assembly and the inner wall of the case during housing encapsulation, which can easily damage the outermost separator of the electrode assembly and potentially cause a short circuit in the battery cell.

[0054] In view of this, a housing is designed, including a housing and two end caps. The housing includes two openings that are opposite each other along a first direction. Along the first direction, the two end caps are connected to both ends of the housing, each sealing the two openings, and the two end caps together with the housing form a housing space for accommodating the electrode assembly.

[0055] The housing has two openings, which increases the degree of openness of the housing, providing more workspace when assembling the electrode assembly into the housing, making it easier to enclose the electrode assembly in the housing and improving the yield of electrode assembly housing enclosures.

[0056] Embodiments of the present invention provide a power-consuming device that uses a battery as a power source, which may be, but is not limited to, an electric motorcycle, an electric vehicle, a ship, or an aerospace aircraft. The aerospace aircraft may include airplanes, rockets, space shuttles, or spacecraft.

[0057] In the following embodiments, for the sake of clarity, we will describe an example in which the power-consuming device according to one embodiment of the present invention is a vehicle.

[0058] Referring to Figure 1, which is a schematic diagram of the structure of a vehicle 1000 provided by some embodiments of the present application, the vehicle 1000 may be a gasoline vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a secondary battery electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to supply power to the vehicle 1000, for example, the battery 100 can be the operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300, the controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the operating power needs of the vehicle 1000 during starting, navigation, and driving.

[0059] In some embodiments of the present invention, the battery 100 can be used not only as an operating power source for the vehicle 1000, but also as a drive power source for the vehicle 1000, providing drive power to the vehicle 1000 in place of or in place of gasoline or natural gas.

[0060] Referring to Figure 2, which is an exploded view of a battery 100 provided by several embodiments of the present invention, the battery 100 includes a box 10 and battery cells 20 housed within the box 10. The box 10 is used to provide housing space for the battery cells 20, and the box 10 can employ various structures. In some embodiments, the box 10 may include a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 covering each other, and together the first portion 11 and the second portion 12 defining housing space for housing the battery cells 20. The second part 12 may be a hollow structure with an opening at one end, and the first part 11 may be a plate-like structure, and the first part 11 covers the opening side of the second part 12 so that the first part 11 and the second part 12 together define a housing space, and both the first part 11 and the second part 12 may be hollow structures with an opening on one side, and the opening side of the first part 11 covers the opening side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 may be of various shapes such as a cylinder or a rectangular parallelepiped.

[0061] In battery 100, there may be multiple battery cells 20, and the connections between the multiple battery cells 20 may be in series, parallel, or series-parallel, with series-parallel connection meaning that both series and parallel connections are included among the multiple battery cells 20. The multiple battery cells 20 may be connected directly in series, parallel, or series-parallel as a single unit, and then the entire assembly of the multiple battery cells 20 may be housed in the box 10. Of course, battery 100 may first form a battery module by connecting multiple battery cells 20 in series, parallel, or series-parallel, and then further connect the multiple battery modules in series, parallel, or series-parallel to form a single whole, which may then be housed in the box 10. Battery 100 may further include other structures, for example, battery 100 may further include busbar members for realizing electrical connections between the multiple battery cells 20.

[0062] Each battery cell 20 may be a secondary battery or a primary battery, and may be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these.

[0063] Referring to Figures 3 and 4, which are embodiments of the present application, Figure 3 is a schematic structural diagram of a housing 21 provided by an embodiment of the present application, and Figure 4 is an exploded view of a housing 21 provided by an embodiment of the present application, which provides a housing 21 comprising a housing 212 and two end caps 211. The housing 212 includes two openings that are opposite each other along a first direction. Along the first direction, the two end caps 211 are each connected to both ends of the housing 212 and each seals the two openings, and the two end caps 211 together with the housing 212 form a housing space for housing an electrode assembly 26.

[0064] In the embodiment of the present application, the housing 21 can be used to house the electrode assembly 26 of the battery cell 20.

[0065] The first direction may be the direction indicated by the Y-axis in the figure.

[0066] The housing 212 may be formed by hollowing out the center of a plate, or by connecting multiple side walls by welding or adhesive. The enclosed shape of the housing 212 may be rectangular, circular, triangular, or other polygonal structure.

[0067] The end caps 211 are used to seal the opening of the housing 212 such that the two end caps 211 and the housing 212 form a cavity. The end caps 211 may be of a flat plate structure, and may be made of the same material as the housing 212 or of a different material.

[0068] The opening is a passage for inserting the electrode assembly 26 into the housing 212. When in use, the electrode assembly 26 is first assembled into the housing 212, and then the two end caps 211 cover the two openings in the housing 212, thereby sealing the electrode assembly 26 inside the housing 212.

[0069] The housing encapsulation yield is the ratio obtained by dividing the number of battery cells 20 in the electrode assembly 26 that are undamaged after the electrode assembly 26 is assembled into the housing 212 by the total number of battery cells 20. The housing encapsulation yield reflects the manufacturing quality of the battery cells 20 in the process of assembling the electrode assembly 26, and a higher housing encapsulation yield indicates higher manufacturing quality.

[0070] The housing 212 has two openings, which increases the degree of openness of the housing 212, providing a larger working space when assembling the electrode assembly 26 into the housing 212, making it easier to enclose the electrode assembly 26 in the housing and improving the yield of housing enclosure for the electrode assembly 26.

[0071] Furthermore, when assembling the electrode assembly into the housing 212 through one opening, the housing sealing status of the electrode assembly 26 can be clearly observed through the other opening, allowing for adjustment of the position of the electrode assembly 26. This also reduces the risk of wear and damage to the outermost separator of the electrode assembly 26 due to excessive friction between the electrode assembly 26 and the inner surface of the housing 212 during housing sealing, thereby further improving the yield of housing sealing of the electrode assembly 26.

[0072] Furthermore, after assembling the electrode assembly 26 into the housing 212, the worker can observe the position of the electrode assembly 26 within the housing 212 and adjust its position, making it easier for other components of the battery cell 20, such as the current collector 22 and electrode terminals 25, to fit with the electrode assembly 26, thereby improving the assembly quality of the battery cell 20.

[0073] Referring to Figure 5, which is a schematic diagram of the structure of a housing 212 provided by some embodiment of the present application, the housing 212 includes a plurality of side walls which are sequentially connected end to end, and the plurality of side walls enclose such that they form two openings, the area of ​​which is greater than the area of ​​the outer surface of each side wall.

[0074] When the ends of multiple side walls are connected sequentially, two opposing ends of the side walls along a first direction enclose each other to form two openings.

[0075] The number of side walls may be three, four, or five, in which case the housing 212 may be triangular, rectangular, or pentagonal in shape.

[0076] The multiple side walls may be independent of each other, and the multiple side walls may be connected by welding or adhesive to form the housing 212. The multiple side walls may be integrally molded, that is, the multiple side walls may be formed from a single plate, for example, if the housing 212 is rectangular, the housing 212 may be formed by bending a single plate three times and then joining the front and back halves.

[0077] When multiple side walls are integrally molded, a circular chamfer may be provided between the side walls when the plate is bent, reducing the risk of the plate breaking during bending.

[0078] The area of ​​the opening is the projected area onto a reference plane perpendicular to the first direction of the opening. If the area of ​​the opening is greater than the area of ​​the outer surface of each side wall, the opening is formed on the side wall with the largest surface area of ​​the housing 21, making it easier to insert the electrode assembly 26 into the housing 21. Also, when the electrode assembly 26 is placed in the case, the movement stroke of the electrode assembly 26 relative to the inner wall of the housing 212 is reduced, and the risk of damage to the electrode assembly 26 due to friction is reduced. For example, if the housing 212 has a rectangular structure, the storage space formed by the housing 21 is rectangular parallelepiped, and the electrode assembly 26 may also be rectangular parallelepiped. If the length of the storage space is greater than the width, and the length is greater than the height, and the electrode assembly 26 is also greater than the width, and the length is greater than the height, then when the electrode assembly 26 is placed in the case, it can be placed in the housing 212 so that the side with the largest surface area of ​​the electrode assembly 26 faces the opening, and the sliding stroke of the electrode assembly 26 relative to the inner wall of the housing 212 is shortest in this case compared to when it is placed in the housing 212 with other sides facing the opening.

[0079] According to some other embodiments of the present application, the housing 212 may include one side wall, which may be formed, for example, by folding a plate into a circle and then joining the front and back, if the housing 212 is a circular structure.

[0080] According to some embodiments of the present application, referring to Figure 5, the plurality of side walls include a first side wall 2121, a second side wall 2122, a third side wall 2123, and a fourth side wall 2124, whose ends are connected sequentially. Along the second direction, the first side wall 2121 and the third side wall 2123 are arranged opposite each other. Along the third direction, the second side wall 2122 and the fourth side wall 2124 are arranged opposite each other. The first, second, and third directions are perpendicular to each other in pairs.

[0081] If the first direction is the direction indicated by the Y-axis in the figure, the second direction may be the direction indicated by the X-axis in the figure, and the third direction may be the direction indicated by the Z-axis in the figure.

[0082] When the first side wall 2121 and the third side wall 2123 are provided facing each other, and the second side wall 2122 and the fourth side wall 2124 are provided facing each other, the first side wall 2121, the second side wall 2122, the third side wall 2123, and the fourth side wall 2124 form a rectangular structure.

[0083] The rectangular housing 212 facilitates stacking multiple battery cells 20 to form a battery pack 100, increasing space utilization, while the rectangular housing 212 has a simple structure and is easy to process and manufacture.

[0084] According to some embodiments of the present application, referring to Figures 6 to 8, Figure 6 is an exploded view of a housing 21 provided with a first edge portion 2125 as provided in some embodiments of the present application, Figure 7 is a schematic diagram of the installation of the first edge portion 2125 as provided in some embodiments of the present application, and Figure 8 is an enlarged view of location A in Figure 7, wherein a first edge portion 2125 is provided along a first direction so as to surround an opening at at least one end of the housing 212, and the first edge portion 2125 is used to connect to an end cap 211.

[0085] The first edge portion 2125 allows the side wall of the housing 212 to have a portion that extends outward, increasing the contact area between the housing 212 and the end cap 211. The first edge portion 2125 may be a flange connected to one end of the side wall of the housing 212 where an opening is formed, or it may be a structure that protrudes from the side wall of the housing 212, formed by bending the side wall portion of the housing 212.

[0086] The first edge portion 2125 and the end cap 211 may be bonded together or welded together.

[0087] The first edge portion 2125 may be provided so as to continuously surround the opening, or a plurality of first edge portions 2125 may be provided arranged along the edge of the opening.

[0088] The housing 212 may have a first edge portion 2125 at one end, or it may have a first edge portion 2125 at either end.

[0089] The first edge portion 2125 increases the contact area between the housing 212 and the end cap 211, further enhancing the connection strength between the housing 212 and the end cap 211.

[0090] According to some embodiments of the present invention, referring to Figure 6, a first edge portion 2125 is provided at both ends of the housing 212 along a first direction, and two end caps 211 are each connected to the two first edge portions 2125.

[0091] The two first edge portions 2125 increase the contact area between the two end caps 211 and the housing 212, further enhancing the connection strength between the two end caps 211 and the housing 212.

[0092] In some embodiments of the present application, referring to Figures 7 and 8, the first edge portion 2125 protrudes from the outer surface of the housing 212.

[0093] The first edge portion 2125 can extend along a direction parallel to the X-axis and protrude from the outer surface of the housing 212 so as to be flush with the opening of the housing 212, and when the opening is covered with the end cap 211, the end cap 211 can come into contact with the first edge portion 2125.

[0094] The first edge portion 2125 may extend along a direction having an angle with the X-axis direction, and accordingly, it may be fitted with the first edge portion 2125 to cover the opening with the end cap 211, or the edge portion of the end cap 211 may be bent.

[0095] When the first edge portion 2125 protrudes from the outer surface of the housing 212, the connection point between the end cap 211 and the housing 212 is located outside the housing 212, reducing the space occupied by the internal housing 212, allowing a larger electrode assembly 26 to be housed inside the housing 212, and increasing the energy density of the battery cell 20. Furthermore, when the housing 212 and the end cap 211 are connected by a connection means that generates high temperatures (e.g., welding), the electrode assembly 26 is kept away from the heat source, reducing the risk of damage to the electrode assembly 26 due to high temperatures.

[0096] According to some other embodiments of the present application, referring to Figures 9 and 10, Figure 9 is a schematic diagram of the installation of the first edge portion 2125 provided in some other embodiments of the present application, and Figure 10 is an enlarged view of location B in Figure 9, where the first edge portion 2125 protrudes from the inner surface of the housing 212.

[0097] The first edge portion 2125 can extend along a direction parallel to the X-axis and protrude from the inner surface of the housing 212 so that the first edge portion 2125 is flush with the opening of the housing 212.

[0098] When the first edge portion 2125 protrudes from the inner surface of the housing 212, not only can the contact area between the end cap 211 and the housing 212 be increased, but the contour of the housing 21 formed by the housing 212 and the two end caps 211 becomes more regular, making it easier to stack multiple battery cells 20 to form a battery pack 100.

[0099] According to some embodiments of the present application, with reference to Figures 11 and 12, Figure 11 is a schematic diagram of the installation of the protrusion 2112 provided by some embodiments of the present application, and Figure 12 is an enlarged view of location C in Figure 11, wherein the protrusion 2112 is provided on the surface of the end cap 211 facing the housing 212 along a first direction, and the protrusion 2112 is positioned to be at least partially located inside the housing 212 and to fit into the housing 212.

[0100] The protrusion 2112 may be a member connected to the surface of the end cap 211 facing the housing 212, or the edge of the surface of the end cap 211 facing the housing 212 may be thinned and the protrusion 2112 may be formed in the center of the end cap 211.

[0101] The protrusion 2112 increases the structural strength of the end cap 211, while also providing a positioning effect on the end cap 211, making it easier for the end cap 211 to cover the opening of the housing 212.

[0102] According to several embodiments of the present application, referring to Figures 13 and 14, Figure 13 is an exploded view of a housing 21 provided with a second edge portion 2111 as provided in several embodiments of the present application, and Figure 14 is an enlarged view of location D in Figure 13, wherein at least one end cap 211 is provided with a second edge portion 2111, the second edge portion 2111 is provided so as to surround the edge of the end cap 211, and along a first direction, the second edge portion 2111 protrudes from the surface of the end cap 211 toward the housing 212, and the second edge portion 2111 is used to connect to the housing 212.

[0103] The second edge portion 2111 may be a flange connected to the end cap 211, or it may be formed by bending the edge of the end cap 211 toward the housing 212.

[0104] The second edge portion 2111 may be provided so as to continuously surround the edge of the end cap 211, or a plurality of second edge portions 2111 may be provided arranged along the edge of the end cap 211.

[0105] The second edge portion 2111 increases the connection area between the housing 212 and the end cap 211, further enhancing the connection strength between the housing 212 and the end cap 211. At the same time, the second edge portion 2111 exerts a positioning effect on the end cap 211, and when the opening is covered with the end cap 211, the inside of the second edge can restrict the displacement of the end cap 211 in the XY plane, making it easier for the end cap 211 to cover the opening of the housing 212.

[0106] According to some embodiments of the present application, referring to Figures 15 and 16, Figure 15 is a schematic diagram of the fitting of the end cap 211 and housing 212 provided by some embodiments of the present application, and Figure 16 is an enlarged view of location E in Figure 15, in which a second edge portion 2111 is provided on both of the two end caps 211.

[0107] By providing a second edge portion 2111 on both of the two end caps 211, the structural strength of the housing 21 formed by the two end caps 211 and the housing 212 is increased.

[0108] According to some embodiments of the present application, referring to Figure 16, the second edge portion 2111 is connected to the outer surface of the housing 212.

[0109] The second edge portion 2111 may be provided so as to surround the outer surface of the housing 212 in order to enhance the positioning effect of the second edge portion 2111 on the end cap 211. For example, the contour enclosed by the second edge portion 2111 may coincide with the contour of the outer surface of the housing 212, and if the end cap 211 is provided so as to cover the opening of the housing 212, the inner surface of the second edge portion 2111 will be in contact with the outer surface of the housing 212. Alternatively, for example, at least one second edge portion 2111 may be provided on each side of the end cap 211 in the X-axis direction, and at least one on each side of the end cap 211 in the Z-axis direction.

[0110] When the second edge portion 2111 is connected to the outer surface of the housing 212, its occupation of the internal space of the housing 212 is reduced, allowing a larger electrode assembly 26 to be housed inside the housing 212, thereby increasing the energy density of the battery cell 20. In addition, the second edge portion 2111 can function as a barrier, preventing high-temperature welding slag generated during welding from entering the inside of the housing 21.

[0111] According to some other embodiments of the present invention, the second edge portion 2111 is connected to the inner surface of the housing 212.

[0112] In this embodiment, when the opening is covered with the end cap 211, the outer wall of the second edge portion 2111 can abut against the inner surface of the housing 212 so that the end cap 211 and the housing 212 can fit together closely.

[0113] When the second edge portion 2111 is connected to the inner surface of the housing 212, the contour of the housing 21 formed by the housing 212 and the two end caps 211 becomes regular, making it easier to stack and install multiple battery cells 20.

[0114] Referring to several embodiments of the present application, see Figures 17 and 18, where Figure 17 is a schematic diagram of the structure of a thickened housing 212 provided by several embodiments of the present application, and Figure 18 is an enlarged view of location F in Figure 17, wherein the housing 212 has an inner surface, an outer surface and two end faces, the inner surface and the outer surface are arranged opposite each other, the two end faces are arranged opposite each other along a first direction, and two end caps 211 are each connected to the two end faces, the end faces connecting the inner surface and the outer surface. The distance between the inner surface and the outer surface is L1, and along the first direction, the end caps 211 have a connection portion that overlaps with the end face, the thickness of the connection portion is L2, and L1 > L2.

[0115] The end face is enclosed to form an opening, the end cap 211 covers the end face, forms a connection, and the opening can be sealed with the end cap 211.

[0116] The distance L1 between the inner and outer surfaces reflects the overlapping area with the end cap 211 on the end face. If the dimensions of the housing 212 remain constant, a larger L1 results in a larger end face area, and further increases the contact area between the end cap 211 and the end face.

[0117] If L1 ≤ L2, the contact area between the end cap 211 and the end face is too small, which reduces the structural strength of the housing 21.

[0118] If L1 > L2, this is equivalent to increasing the thickness of the housing 212, further enhancing the structural strength of the housing 21. On the other hand, the contact area at the connection point between the end cap 211 and the housing 212 increases, enhancing the connection strength between the housing 212 and the end cap 211, and reducing the risk of melt-through defects occurring during welding of the end cap 211 and the housing 212.

[0119] According to some embodiments of the present application, referring to Figures 19 to 20, Figure 19 is a schematic diagram of the fitting of the housing 212 and end cap 211 provided by some embodiments of the present application, and Figure 20 is an enlarged view of location G in Figure 19, where the thickness of the end cap 211 is D1 and the thickness of the housing 212 is D2, satisfying 50 μm ≤ D1 ≤ 200 μm and / or 50 μm ≤ D2 ≤ 200 μm.

[0120] If D1 or D2 is greater than 200 μm, the thickness of the housing 21 formed by the end cap 211 and the housing 212 is too large, and even if the dimensions of the housing 21 remain unchanged, the volume of the housing space formed by the housing 21 is small, the energy density of the battery cell 20 decreases, and the weight of the battery cell 20 increases.

[0121] If D1 or D2 is less than 50 μm, the strength of the end cap 211 and housing 212 decreases, and the strength of the housing 21 decreases further.

[0122] In this embodiment, D1 and D2 may both be in the range of 50 μm or more and 200 μm or less, or only D1 or D2 may satisfy the above range.

[0123] If the thickness D1 of the end cap 211 satisfies 50 μm ≤ D1 ≤ 200 μm, the strength of the end cap 211 is increased, and at the same time, the internal volume of the housing 21 formed by the end cap 211 and the housing 212 increases. If the thickness D2 of the housing 212 satisfies 50 μm ≤ D2 ≤ 200 μm, the strength of the housing 212 is increased, and at the same time, the internal volume of the housing 21 formed by the end cap 211 and the housing 212 increases.

[0124] According to some other embodiments of the present application, the thickness of the end cap 211 is D1, the thickness of the housing 212 is D2, and the conditions 70 μm ≤ D1 ≤ 150 μm and / or 70 μm ≤ D2 ≤ 150 μm are satisfied.

[0125] According to some embodiments of the present application, the housing 212 and / or end cap 211 include stainless steel.

[0126] In this embodiment, both the housing 212 and the end cap 211 may contain stainless steel, or one of the housing 212 and the end cap 211 may contain stainless steel.

[0127] Of the housing 212 and end cap 211, those containing stainless steel may be manufactured locally from stainless steel or entirely from stainless steel. For example, if the housing 212 contains stainless steel, the housing 212 may be manufactured entirely from stainless steel or partially from stainless steel.

[0128] The stainless steel surface may be coated, for example, an insulating layer may be provided on the surface of the housing 212 and the end cap 211 to electrically insulate the housing 21 from the electrode assembly 26, thereby increasing the reliability of the battery cell 20. A nickel plating layer may be further provided on the surface of the housing 212 and the end cap 211, which enhances the wear resistance and corrosion resistance of the housing 21 and further extends the service life of the housing 21.

[0129] Stainless steel material has high strength and fatigue strength, allowing for a smaller wall thickness in the housing 21 formed by the casing 212 and end cap 211, enabling the accommodation of larger electrode assemblies 26 within the housing 21, thereby increasing the energy density of the battery cells 20. On the other hand, stainless steel has good corrosion resistance, extending the service life of the housing 21.

[0130] According to some other embodiments of the present application, the housing 212 and / or end cap 211 may be made of an aluminum alloy.

[0131] According to some embodiments of the present invention, the end cap 211 is welded to the housing 212.

[0132] When welding the end cap 211 to the housing 212, the welding is performed at the contact point between the first edge portion 2125 and the end cap 211, or at the contact point between the second edge portion 2111 and the end cap 211.

[0133] In the above proposed technology, the connection between the end cap 211 and the housing 212 by welding has the advantage of high connection strength, while after welding, the contour of the connection point between the end cap 211 and the housing 212 becomes regular, without forming large protrusions, and the outer contour of the housing 21 becomes regular.

[0134] According to some embodiments of the present application, embodiments of the present application further provide a battery cell 20 comprising the housing 21 and an electrode assembly 26 in the above embodiments. The electrode assembly 26 is housed within the housing 21.

[0135] According to some embodiments of the present application, referring to Figure 21, which is a schematic diagram of the structure of an electrode terminal 25 provided by some embodiments of the present application, the housing 212 has a wall portion, and the wall portion First A drawer hole is provided. FirstThe extraction hole penetrates the wall along the thickness direction of the wall. The battery cell 20 further includes an electrode terminal 25, which is electrically connected to the electrode assembly 26, and the electrode terminal 25 includes a terminal body 252, a first restricting portion 253 and a second restricting portion 251, and the terminal body 252 is First The first restricting portion 253 and the second restricting portion 251 are drilled within the pull-out hole and are connected to both ends of the terminal body 252 along the thickness direction of the wall, and the first restricting portion 253 and the second restricting portion 251 are located on both sides of the wall so as to fix the terminal body 252.

[0136] The wall portion may be any one of the side walls of the housing 212, and since the housing 212 has two openings and a large working space, First Providing a pull-out hole in the wall makes it easier to connect the electrode assembly 26 to the electrode terminal 25.

[0137] The first restricting portion 253 and the second restricting portion 251 are formed by riveting the terminal body 252 to the wall, that is, by applying an acting force along the axial direction of the terminal body 252 to both ends of the terminal body 252, thereby widening both ends of the terminal body 252 along the radial direction of the terminal body 252, and the terminal body 252 can be fixed to the wall by the wall being partially sandwiched between the first restricting portion 253 and the second restricting portion 251.

[0138] The first restricting portion 253 and the second restricting portion 251 may be independent components. For example, screws may be provided on the peripheral wall of the terminal body 252, or screw holes may be provided in the first restricting portion 253 and the second restricting portion 251. By fitting the terminal body 252 into the screw holes, the first restricting portion 253 and the second restricting portion 251 can be screwed onto the terminal body 252.

[0139] The terminal body 252 is used to draw electrical energy from the electrode assembly 26 from the housing 21. The terminal body 252 is fixed to the wall by the action of the first restricting portion 253 and the second restricting portion 251, eliminating the need to weld the terminal body 252 to the wall and reducing the risk of damage to the structure of the housing 212 due to melting during welding.

[0140] According to some embodiments of the present application, referring to Figure 21, the battery cell 20 further includes a current collector member 22 connecting an electrode terminal 25 and an electrode assembly 26. The current collector member 22 is provided with a second lead hole, and the terminal body 252 is drilled in the second lead hole, and along the thickness direction of the wall, the first restrictor 253 is located inside the housing 21, and the current collector member 22 is located at least partially between the first restrictor 253 and the wall.

[0141] The current collector 22 is used to electrically connect the electrode terminal 25 and the electrode assembly 26, and the current collector 22 may be a metal conductive member such as a metal wire or a metal conductive sheet.

[0142] The current collector 22 is partially provided between the first restricting portion 253 and the wall portion. The first restricting portion 253 not only allows the current collector 22 to be connected to the terminal body 252, but also allows the terminal body 252 and the current collector 22 to be electrically connected. This eliminates the need to weld the terminal body 252 and the current collector 22, reducing the risk of damage to the structure of the housing 212 due to melting during welding. Furthermore, since welding is not required, the assembly process is simplified, and manufacturing efficiency is increased.

[0143] According to some embodiments of the present application, referring to Figure 21, the battery cell 20 further includes a first insulating member 23, which, along the thickness direction of the wall, is at least partially positioned between the current collector 22 and the wall so as to insulate and isolate the current collector 22 from the wall.

[0144] The first insulating member 23 may be a sheet made of plastic or rubber, and the first insulating member 23 may be provided with a third outlet hole, and the terminal body 252 can be drilled in the first outlet hole, the third outlet hole and the second outlet hole in order, so that the first insulating member 23 can be sandwiched between the wall portion and the current collector member 22.

[0145] The first insulating member 23 reduces the risk of short circuits between the current collector 22 and its wall portion, thereby improving the reliability of the battery cell 20.

[0146] According to some embodiments of the present application, referring to Figure 21, the battery cell 20 further includes a second insulating member 24, which, along the thickness direction of the wall, is at least partially located between the wall and a second restricting portion 251, and the second restricting portion 251 is located outside the housing 21.

[0147] The second insulating member 24 may be a sheet made of plastic or rubber, and the second insulating member 24 may be provided with a fourth lead hole, and the terminal body 252 is drilled into the fourth lead hole so that the second insulating member 24 is partially sandwiched between the second restricting portion 251 and the wall portion.

[0148] A counterbore may be provided on the side of the second insulating member 24 facing the second restricting portion 251, and the second restricting portion 251 may be provided at least partially within the counterbore, thereby positioning the second insulating member 24 and the second restricting portion 251 to fit together.

[0149] The second insulating member 24 reduces the risk of short circuits between the second restricting portion 251 and the wall portion, thereby improving the reliability of the battery cell 20.

[0150] According to some embodiments of the present application, embodiments of the present application further provide a battery 100 including the battery cell 20 in the above embodiments. The battery 100 may further include a box 10, and the battery cell 20 is provided inside the box 10.

[0151] According to some embodiments of the present application, embodiments of the present application further provide a power-consuming device including the battery 100 in the above embodiment for providing electrical energy. Alternatively, the power-consuming device may include the battery cell 20 in the above embodiment for providing electrical energy.

[0152] According to some embodiments of the present application, referring to Figures 3 to 5, embodiments of the present application further provide a housing 21 including a housing 212 and two end caps 211. The housing 212 includes two openings that are opposite each other along a first direction. Along the first direction, the two end caps 211 are each connected to both ends of the housing 212, each sealing the two openings, and the two end caps 211 together with the housing 212 form a housing space for housing an electrode assembly 26.

[0153] The housing 212 has a rectangular structure and includes a plurality of side walls that are sequentially connected from end to end, the plurality of side walls enclosing two openings, the area of ​​which is greater than the area of ​​the outer surface of each side wall.

[0154] Finally, it should be noted that the above embodiments are used solely to illustrate the technical solutions of the present application and are not intended to limit them. Although the present application has been described in detail with reference to the embodiments described above, it will be understandable to those skilled in the art that the technical solutions described in the embodiments described above can still be modified, or some or all of their technical features can be replaced with equivalent substitutions. Such modifications or substitutions will not cause the substance of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and all such modifications or substitutions should be included within the scope of the claims and specification of the present application. In particular, all technical features mentioned in each embodiment can be combined in any way, provided that there is no structural conflict. The present application is not limited to the specific embodiments disclosed in the specification, but includes all technical solutions within the claims. [Explanation of symbols]

[0155] 10 boxes 11 Part 1 12. Part 2 20 battery cells 21 Housing 211 End Cap 2111 Second edge section 2112 Convex part 212 cabinets 2121 First side wall 2122 Second side wall 2123 Third side wall 2124 Fourth side wall 2125 First edge section 22 Current collector 23 First insulating member 24 Second insulating member 25 Electrode terminal 251 Second Regulatory Section 252 Terminal body 253 First Regulatory Section 26 Electrode assembly 100 batteries 200 controllers 300 motor 1000 vehicles

Claims

1. A housing including two openings arranged opposite each other along a first direction, Two end caps are connected to both ends of the housing, respectively, along the first direction, sealing the two openings and surrounding them to form a housing space for housing the electrode assembly together with the housing, Includes, Along the first direction, a first edge portion is provided at at least one end of the housing so as to surround the opening, and the first edge portion is used to connect to the end cap. The first edge portion protrudes from the inner surface of the housing, At least one of the end caps is provided with a second edge portion, the second edge portion is provided so as to surround the edge of the end cap, and along the first direction, the second edge portion protrudes from the surface of the end cap facing the housing, and the second edge portion is used to connect to the housing. The second edge portion is connected to the outer surface of the housing. A housing characterized by the following features.

2. The housing according to claim 1, wherein the housing includes a plurality of side walls whose ends are sequentially connected, the plurality of side walls enclose such that they form two openings, and the area of ​​the openings is greater than the area of ​​the outer surface of each of the side walls.

3. The plurality of side walls include a first side wall, a second side wall, a third side wall, and a fourth side wall whose ends are connected in sequence, Along the second direction, the first side wall and the third side wall are provided facing each other, Along the third direction, the second side wall and the fourth side wall are provided facing each other, The housing according to claim 2, characterized in that the first direction, the second direction, and the third direction are perpendicular to each other in pairs.

4. The housing according to claim 1, characterized in that the first edge portion is provided at both ends of the housing along the first direction, and the two end caps are each connected to the two first edge portions.

5. The housing according to any one of claims 1 to 3, characterized in that a protrusion is provided on the surface of the end cap facing the housing along the first direction, and the protrusion is at least partially located within the housing and positioned to fit into the housing.

6. The housing according to claim 1, characterized in that the second edge portion is provided on both of the two end caps.

7. The housing has an inner surface, an outer surface and two end faces, the inner surface and the outer surface are arranged opposite each other, the two end faces are arranged opposite each other along the first direction, the two end caps are each connected to the two end faces, the end faces connect the inner surface and the outer surface, The distance between the inner surface and the outer surface is L. １ The end cap has a connecting portion that overlaps with the end face along the first direction, and the thickness of the connecting portion is L ２ And L １ > L ２ A housing according to any one of claims 1 to 3, characterized in that it is the same as the above.

8. The thickness of the end cap is D １ The thickness of the housing is D ２ Therefore, 50 μm ≤ D １ ≤200 μm and / or 50 μm ≤D ２ A housing according to any one of claims 1 to 3, characterized in that it satisfies ≤200 μm.

9. The housing according to any one of claims 1 to 3, characterized in that the housing and / or the end cap include stainless steel.

10. The housing according to any one of claims 1 to 3, characterized in that the end cap is welded to the housing.

11. A housing according to any one of claims 1 to 3, An electrode assembly housed within the aforementioned housing, A battery cell characterized by containing the following.

12. The housing has a wall portion, and a first pull-out hole is provided in the wall portion, and the first pull-out hole penetrates the wall portion along the thickness direction of the wall portion, The battery cell according to claim 11, further comprising an electrode terminal, the electrode terminal being electrically connected to the electrode assembly, the electrode terminal comprising a terminal body, a first restricting portion and a second restricting portion, the terminal body being drilled in the first outlet hole, the first restricting portion and the second restricting portion being connected to both ends of the terminal body along the thickness direction of the wall, and the first restricting portion and the second restricting portion being located on both sides of the wall so as to fix the terminal body.

13. The battery cell further includes a current collector that connects the electrode terminals and the electrode assembly, The battery cell according to claim 12, characterized in that the current collector member is provided with a second lead hole, the terminal body is drilled in the second lead hole, the first restricting portion is located in the housing along the thickness direction of the wall portion, and the current collector member is located at least partially between the first restricting portion and the wall portion.

14. A battery characterized by including the battery cell described in claim 11.

15. A power consumption device characterized by including the battery described in claim 14.

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