Housing, battery cell, battery, and power-consuming device

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

[0001] This application relates to the field of battery technology, and specifically, to a housing, a battery cell, a battery, and an electric power consuming 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 Consuming Device", filed on October 17, 2022, and all the contents of the said application are incorporated herein by reference.

Background Art

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

[0004] The manufacturing process of battery cells includes a housing encapsulation process of assembling an electrode assembly into a housing. In conventional housings, it is difficult to assemble the electrode assembly into the case, which reduces 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 consuming device that can improve the yield of housing encapsulation of the electrode assembly.

[0006] In a first aspect, an embodiment of this application provides 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, each sealing one of the two openings, and surrounding together with the housing body to form a receiving space for accommodating the electrode assembly.

[0007] In the above technical solution, the housing has two openings, the opening degree of the housing increases, when assembling the electrode assembly into the housing, the working space becomes larger, it is easier to enclose the housing of the electrode assembly, and the yield of housing enclosure of the electrode assembly is improved. On the other hand, when assembling the electrode assembly into the housing from one opening, the housing enclosure situation of the electrode assembly can be clearly observed through the other opening, the position of the electrode assembly can be adjusted, and furthermore, when the housing of the electrode assembly is enclosed, the risk of damage caused by excessive friction with the inner surface of the housing is reduced, and the yield of housing enclosure of the electrode assembly is further increased.

[0008] In some embodiments, the housing includes a plurality of side walls whose ends are sequentially connected, the plurality of side walls surround to form two openings, and the area of the openings is larger than the area of the outer surface of each side wall.

[0009] In the above technical solution, 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, and it is easy to put the electrode assembly into the housing.

[0010] In some embodiments, 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 sequentially connected. Along the second direction, the first side wall and the third side wall are provided opposite to each other. Along the third direction, the second side wall and the fourth side wall are provided opposite to each other. The first direction, the second direction and the third direction are perpendicular to each other in pairs.

[0011] In the above technical solution, the first side wall, the second side wall, the third side wall and the fourth side wall form a rectangular housing. In the case of a rectangular housing, it is easy to stack a plurality of battery cells to form a battery pack, improving the space utilization rate. On the other hand, the rectangular housing has a simple structure and is easy to process and manufacture.

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

[0013] In the above technical solution, the first edge portion increases the contact area between the housing and the end cap, and further enhances the connection strength between the housing and the end cap.

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

[0015] In the above technical solution, the connection strength when the two end caps are connected to the housing is respectively enhanced by the two first edge portions.

[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 technical solution, when the first edge portion protrudes from the outer surface of the housing, the connection location between the end cap and the housing is located outside the housing, reducing the occupation of the internal space of the housing, and a larger-sized electrode assembly can be accommodated inside the housing, enhancing the energy density of the battery cell. When 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 regular, facilitating the stacking of a plurality of battery cells.

[0018] In some embodiments, along the first direction, convex portions are provided on the surface of the end cap facing the housing, and the convex portions are at least partially located inside the housing and are positioned to fit the housing.

[0019] In the above technical solution, the convex portions enhance the structural strength of the end cap while exerting 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, a second edge portion is provided on at least one end cap. The second edge portion is provided so as to surround the edge of the end cap. Along the first direction, the second edge portion protrudes from the surface facing the housing of the end cap, and the second edge portion is used for connecting to the housing.

[0021] In the above technical solution, the second edge portion increases the connection area between the housing and the end cap, and further enhances the connection strength between the housing and the end cap. On the other hand, the second edge portion plays a positioning role with respect to the end cap, making it easier for the end cap to cover the opening of the housing.

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

[0023] In the above technical solution, the provision of the second edge portion on both of the two end caps enhances 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 technical solution, when the second edge portion is connected to the outer surface of the housing, the occupation of the internal space of the housing is reduced, and an electrode assembly with larger dimensions can be accommodated inside the housing, increasing the energy density of the battery cell. When the second edge portion is connected to the inner surface of the housing, the contour of the housing formed by the housing and the two end caps becomes regular, making it easier to stack and provide a plurality of 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, and the two end faces are provided opposite to each other along the 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 L 1and along the first direction, the end cap has a connection portion overlapping the end face, and the thickness of the connection portion is L 2 and L 1 >L 2 is the case.

[0027] In the above technical solution, L 1 >L 2 In this case, since the thickness of the housing increases, the structural strength of the housing is enhanced. On the other hand, the contact area at the connection location 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 D 1 and the thickness of the housing is D 2 and 50μm ≤ D 1 ≤ 200μm, and / or, 50μm ≤ D 2 ≤ 200μm is satisfied.

[0029] In the above technical solution, when the thickness D of the end cap 1 satisfies 50μm ≤ D 1 ≤ 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 D of the housing 2 satisfies 50μm ≤ D 2 ≤ 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.

[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] In the above technical solution, the end cap and the housing are connected by welding, which has the advantage of high connection strength. On the other hand, after welding, the contour of the connection location 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 aspect, an embodiment of the present application provides a battery cell including the housing in the above embodiment and an electrode assembly. The electrode assembly is accommodated in the housing.

[0035] In some embodiments, the housing has a wall portion, and a lead-out hole is provided in the wall portion. The lead-out hole penetrates the wall portion along the thickness direction of the wall portion. The battery cell further includes an electrode terminal. The electrode terminal is electrically connected to the electrode assembly. The electrode terminal includes a terminal body, a first restricting portion, and a second restricting portion. The terminal body is disposed in the lead-out hole. Along the thickness direction of the wall portion, the first restricting portion and the second restricting portion are respectively connected to both ends of the terminal body, and the first restricting portion and the second restricting portion are respectively located on both sides of the wall portion so as to fix the terminal body.

[0036] In the above technical solution, the terminal body is used to draw out the electrical energy of the electrode assembly from the housing. The terminal body is fixed to the wall portion by the actions of the first restricting portion and the second restricting portion, and there is no need to weld the terminal body and the wall portion, reducing the risk of damaging the housing structure by melting the housing during welding.

[0037] In some embodiments, the battery cell further includes a current collecting member connecting the electrode terminal and the electrode assembly. A second lead-out hole is provided in the current collecting member. The terminal body is disposed in the second lead-out hole. Along the thickness direction of the wall portion, the first restricting portion is located inside the housing, and the current collecting member is at least partially located between the first restricting portion and the wall portion.

[0038] In the above technical solution, the current collecting member is used to electrically connect the electrode terminal and the electrode assembly. By sandwiching the current collecting member between the first restricting portion and the wall portion, the current collecting member is fixed to the electrode terminal, simplifying the assembly process and enhancing the manufacturing efficiency.

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

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

[0041] The above description is merely a general overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented according to the content of the specification. Also, in order to make the above and other objects, features, and advantages of the present application clearer and more understandable, specific embodiments of the present application are given below.

Brief Description of the Drawings

[0042] After reading the detailed description of the following preferred embodiments, various other advantages and beneficial aspects will become apparent to those skilled in the art. The drawings are only intended to show the preferred embodiments and are not considered to be a limitation to the present application. Also, in all the drawings, the same reference numerals represent the same members.

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Embodiments for Carrying Out the Invention

[0043] Hereinafter, embodiments of the technical solution of the present application will be described in detail with reference to the drawings. The following embodiments are merely used as examples to more clearly illustrate the technical solution of the present application, and thus should not be used to limit the protection scope of the present application.

[0044] 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. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit the present application. The terms "comprising", "having" and any variations thereof in the description of the specification, claims and drawings of the present application are intended to cover the non-exclusive "comprising".

[0045] In the description of the embodiments of the present application, technical terms such as "first", "second", etc. are used only to distinguish different objects and should not be understood as indicating or implying relative importance, or indicating the number of technical features, specific order or primary-secondary relationship. In the description of the embodiments of the present application, unless otherwise clearly and specifically limited, "a plurality" means two or more.

[0046] When referring to "embodiments" in this specification, it means that specific features, structures or characteristics described in accordance with the embodiments may be included in at least one embodiment of the present application. This phrase described in each part of the specification does not necessarily refer to the same embodiment, nor is it an exclusive, separate or alternative embodiment that is mutually exclusive with other embodiments. A person skilled in the art can clearly and implicitly understand that the embodiments described in this specification can be combined with other embodiments.

[0047] In the description of the embodiments of the present application, the term "and / or" is only used to describe the relationship between related objects and indicates that three relationships may exist. For example, A and / or B can represent three cases: A alone, a combination of A and B, and B alone. Also, the character " / " in this specification generally represents that the related objects before and after are in an "or" relationship.

[0048] In the description of the embodiments of the present application, the term "a plurality" refers to two or more. Similarly, "a plurality of groups" refers to two or more groups, and "a plurality of sheets" refers to two or more sheets.

[0049] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "vertical direction", "horizontal direction", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction" is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description and simplifying the description of the embodiments of the present application, and does not indicate or imply that the indicated device or element must have a specific orientation and be configured and operate in a specific orientation. Therefore, it should not be understood as limiting the embodiments of the present application.

[0050] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, technical terms such as "attach", "connect", "connect", "fix", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or the communication inside two elements or the interaction relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present application according to the specific situation.

[0051] In the embodiments of the present application, the same reference numerals represent the same components. Also, for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the dimensions such as the thickness, length, and width of each member in the embodiments of the present application shown in the drawings, and the dimensions such as the overall thickness, length, and width of the integrated device are only exemplary and do not impose any limitation on the present application.

[0052] A general battery cell usually includes components such as a case, an electrode assembly, and an end cap assembly. The case has an opening, and during the assembly process of the battery cell, the electrode assembly is fed into the case through the opening. The electrode assembly is housed within the case, and the end cap covers the opening of the case so as to isolate the internal environment of the battery cell from the external environment.

[0053] Since the opening is usually formed on one side wall of the case, during the process of housing the electrode assembly, firstly, due to the small size of the opening, it is difficult to assemble the electrode assembly into the case. Secondly, since the case has only one opening, it is difficult to determine whether the electrode assembly is aligned with the opening during housing. If the electrode assembly is not aligned with the opening, friction will occur between the electrode assembly and the inner wall of the case during the housing process, easily damaging the outermost separator of the electrode assembly, and there is a possibility of short circuit in the battery cell.

[0054] In view of this, a housing including a housing body and two end caps is designed. 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, sealing the two openings respectively, and the two end caps surround together with the housing body to form an accommodation space for housing the electrode assembly.

[0055] The housing body has two openings, the openness of the housing body increases, when assembling the electrode assembly into the housing body, the working space becomes larger, making it easier to house the electrode assembly and improving the yield of housing the electrode assembly.

[0056] The embodiments of the present application provide a power-consuming device using a battery as a power source. The power-consuming device may be, but is not limited to, an electric bicycle, an electric vehicle, a ship, an aircraft, etc. The aircraft can include airplanes, rockets, space shuttles, spacecraft, etc.

[0057] In the following embodiments, for ease of explanation, an example in which the power consumption device according to an embodiment of the present application is a vehicle will be described.

[0058] Referring to FIG. 1, FIG. 1 is a schematic structural diagram of a vehicle 1000 provided according to 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, a range-extended electric vehicle, or the like. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided 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 used as the operating power source of 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, it is used to meet the needs of the operating power during the start, navigation, and driving of the vehicle 1000.

[0059] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000 to provide driving power to the vehicle 1000 instead of gasoline or natural gas, or instead of a part of them.

[0060] Referring to FIG. 2, FIG. 2 is an exploded view of a battery 100 provided by some embodiments of the present application. The battery 100 includes a box 10 and battery cells 20 housed in the box 10. The box 10 is used to provide a housing space for the battery cells 20, and the box 10 can adopt various structures. In some embodiments, the box 10 can include a first part 11 and a second part 12. The first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 together define a housing space for housing the battery cells 20. The second part 12 may have a hollow structure with an opening at one end, the first part 11 may have 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. The first part 11 and the second part 12 may both have a hollow structure 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 have various shapes such as a cylinder or a cuboid.

[0061] In the battery 100, there may be a plurality of battery cells 20. The connection between the plurality of battery cells 20 may be a series connection, a parallel connection, or a series-parallel connection. The series-parallel connection means that both series connection and parallel connection are included in the plurality of battery cells 20. After directly connecting the plurality of battery cells 20 in series, parallel, or series-parallel integrally, the whole formed by the plurality of battery cells 20 may be housed in the box 10. Of course, the battery 100 may first connect the plurality of battery cells 20 in series, parallel, or series-parallel to form the form of a battery module, and then further connect the plurality of battery modules in series, parallel, or series-parallel to form a whole, and be housed in the box 10. The battery 100 may further include other structures. For example, the battery 100 may further include a bus bar member for realizing the electrical connection between the plurality of 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 thereto.

[0063] According to some embodiments of the present application, referring to FIGS. 3 and 4, FIG. 3 is a schematic structural diagram of a housing 21 provided by some embodiments of the present application, and FIG. 4 is an exploded view of the housing 21 provided by some embodiments of the present application. Embodiments of the present application provide a housing 21 including a housing body 212 and two end caps 211. The housing body 212 includes two openings provided opposite to each other along a first direction. Along the first direction, the two end caps 211 are respectively connected to both ends of the housing body 212, and respectively seal the two openings, and the two end caps 211 surround the housing body 212 to form an accommodation space for accommodating the electrode assembly 26.

[0064] The housing 21 in the embodiments of the present application can be used to accommodate 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 body 212 may be formed by punching out the central portion of a plate, or may be formed by connecting a plurality of side walls by welding or adhesion. The shape surrounded by the housing body 212 may be a rectangular, circular, triangular, or other polygonal structure.

[0067] The end cap 211 is used to seal the opening of the housing body 212 so that the two end caps 211 and the housing body 212 form a cavity. The end cap 211 may have a flat plate structure. The end cap 211 may be manufactured from the same material as the housing body 212, or may be manufactured from a different material.

[0068] The opening is a passage for inserting the electrode assembly 26 into the housing 21. During use, first, the electrode assembly 26 is assembled into the housing 212, and then the two openings of the housing 212 are respectively covered by the two end caps 211 to seal the electrode assembly 26 in the housing 212.

[0069] The housing encapsulation yield is the ratio of the number of undamaged battery cells 20 in the electrode assembly 26 after assembling the electrode assembly 26 into the housing 212 to the total number of all 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. The higher the housing encapsulation yield, the higher the manufacturing quality.

[0070] The housing 212 has two openings. As the opening degree of the housing 212 increases, when assembling the electrode assembly 26 into the housing 212, the working space becomes larger, making it easier to encapsulate the electrode assembly 26 in the housing and improving the housing encapsulation yield of the electrode assembly 26.

[0071] Furthermore, when assembling the electrode assembly into the housing 212 from one opening, the housing encapsulation status of the electrode assembly 26 can be clearly observed through the other opening, the position of the electrode assembly 26 can be adjusted, and furthermore, the risk that the outermost separator of the electrode assembly 26 is worn and damaged due to excessive friction between the electrode assembly 26 and the inner surface of the housing 212 during housing encapsulation is reduced, further increasing the housing encapsulation yield of the electrode assembly 26.

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

[0073] According to some embodiments of the present application, referring to FIG. 5, FIG. 5 is a schematic structural diagram of a housing 212 provided by some embodiments of the present application. The housing 212 includes a plurality of side walls whose ends are sequentially connected. The plurality of side walls surround to form two openings, and the area of the openings is larger than the area of the outer surface of each side wall.

[0074] When the ends of the plurality of side walls are sequentially connected, two opposite ends along the first direction of the side wall surround to form two openings.

[0075] The plurality of side walls may be three, four or five. In this case, correspondingly, the housing 212 is triangular, rectangular or pentagonal.

[0076] The plurality of side walls may be independent side walls. The plurality of side walls are connected by welding or adhesion to form the housing 212. The plurality of side walls may be integrally formed, that is, the plurality of side walls may be formed of a single plate. For example, when the housing 212 is rectangular, the housing 212 may be formed by folding a single plate three times and then connecting the front and back.

[0077] When the plurality of side walls are integrally formed, an arc chamfer may be provided between the side walls when folding the plate to reduce the risk of the plate breaking when folding the plate.

[0078] The area of the opening is the projected area onto a reference plane perpendicular to the first direction of the opening. When the area of the opening is larger than the area of the outer surface of each side wall, the opening is formed in the side wall with the largest surface area of the housing 21, facilitating the insertion of the electrode assembly 26 into the housing 21. Also, when inserting the electrode assembly 26 into the case, the movement stroke of the electrode assembly 26 with respect to the inner wall of the housing 212 is reduced, and the risk of damage to the electrode assembly 26 due to friction is decreased. For example, when the housing 212 has a rectangular structure, the accommodation space formed by the housing 21 may be a cuboid, and the electrode assembly 26 may also be a cuboid. When the length of the accommodation space is larger than the width, and at the same time the length is larger than the height, and the electrode assembly 26 also has a length larger than the width and a length larger than the height, when inserting the electrode assembly 26 into the case, the electrode assembly 26 can be inserted into the housing 212 such that the largest surface of the electrode assembly 26 faces the opening. Compared with the case of inserting the electrode assembly 26 into the housing 212 with other surfaces facing the opening, the sliding stroke of the electrode assembly 26 with respect to the inner wall of the housing 212 at this time is the shortest.

[0079] According to some other embodiments of the present application, the housing 212 can include one side wall. For example, when the housing 212 has a circular structure, it may be formed by bending a single plate into a circular shape and then connecting the front and back.

[0080] According to some embodiments of the present application, referring to FIG. 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, where the ends are sequentially connected. Along the second direction, the first side wall 2121 and the third side wall 2123 are provided opposite to each other. Along the third direction, the second side wall 2122 and the fourth side wall 2124 are provided opposite to each other. The first direction, the second direction, and the third direction are perpendicular to each other in pairs.

[0081] When 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 opposite to each other, and the second side wall 2122 and the fourth side wall 2124 are provided opposite to 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] According to the rectangular housing 212, it is easy to stack a plurality of battery cells 20 to form a battery pack of the battery 100, while increasing the space utilization rate. On the other hand, 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 FIGS. 6 to 8, FIG. 6 is an exploded view of the housing 21 provided with a first edge portion 2125 provided according to some embodiments of the present application, and FIG. 7 is a schematic installation diagram of the first edge portion 2125 provided according to some embodiments of the present application. FIG. 8 is an enlarged view of the portion A in FIG. 7. Along the first direction, a first edge portion 2125 is provided so as to surround an opening at at least one end of the housing 212, and the first edge portion 2125 is used for connecting to the end cap 211.

[0085] According to the first edge portion 2125, the side wall of the housing 212 has a portion extending outward, and the contact area between the housing 212 and the end cap 211 increases. The first edge portion 2125 may be a flange connected to one end where the opening of the side wall of the housing 212 is formed, or may be a structure protruding 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 adhered or welded.

[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 arranged along the edge of the opening.

[0088] The housing 212 may be provided with a first edge portion 2125 at one end, or the first edge portion 2125 may be provided at both ends.

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

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

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

[0092] According to some embodiments of the present application, referring to FIGS. 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 so that the first edge portion 2125 is flush with the opening of the housing 212 and protrudes from the outer surface of the housing 212. When the end cap 211 covers the opening, the end cap 211 can contact the first edge portion 2125.

[0094] The first edge portion 2125 may extend along a direction having an included angle with the X-axis direction. Accordingly, in order for the end cap 211 to cover the opening, the first edge portion 2125 may be fitted, 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 location between the end cap 211 and the housing 212 is located outside the housing 212, reducing the occupation of the internal space of the housing 212. A larger-sized electrode assembly 26 can be accommodated inside the housing 212, enhancing the energy density of the battery cell 20. Further, when the housing 212 and the end cap 211 are connected by a connection means that generates heat (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 temperature.

[0096] According to some other embodiments of the present application, referring to FIGS. 9 and 10, FIG. 9 is a schematic installation diagram of the first edge portion 2125 provided according to some other embodiments of the present application, and FIG. 10 is an enlarged view of portion B in FIG. 9. 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 so as to be flush with the opening of the housing 212 and protrude from the inner surface 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 also the contour of the housing 21 formed by the housing 212 and the two end caps 211 becomes regular, facilitating the formation of a battery pack 100 by stacking a plurality of battery cells 20.

[0099] According to some embodiments of the present application, referring to FIGS. 11 and 12, FIG. 11 is a schematic installation diagram of the convex portion 2112 provided according to some embodiments of the present application, and FIG. 12 is an enlarged view of portion C in FIG. 11. Along the first direction, a convex portion 2112 is provided on the surface of the end cap 211 facing the housing 212. The convex portion 2112 is at least partially located inside the housing 212 and is positioned to fit into the housing 212.

[0100] The convex portion 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 convex portion 2112 may be formed at the central portion of the end cap 211.

[0101] The convex portion 2112 enhances the structural strength of the end cap 211 while exerting 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 some embodiments of the present application, referring to FIGS. 13 to 14, FIG. 13 is an exploded view of the housing 21 provided with the second edge portion 2111 provided by some embodiments of the present application, and FIG. 14 is an enlarged view of the D portion in FIG. 13. The second edge portion 2111 is provided on at least one end cap 211. The second edge portion 2111 is provided so as to surround the edge of the end cap 211. Along the first direction, the second edge portion 2111 protrudes from the surface of the end cap 211 facing the housing 212, and the second edge portion 2111 is used for connection to the housing 212.

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

[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, and further enhances the connection strength between the housing 212 and the end cap 211. On the other hand, the second edge portion 2111 exerts a positioning effect on the end cap 211. When the end cap 211 covers the opening, 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 FIGS. 15 to 16, FIG. 15 is a fitting schematic diagram of the end cap 211 and the housing 212 provided according to some embodiments of the present application, and FIG. 16 is an enlarged view of portion E in FIG. 15. The second edge portion 2111 is provided on both of the two end caps 211.

[0107] By providing the 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 enhanced.

[0108] According to some embodiments of the present application, referring to FIG. 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 end cap 211 by the second edge portion 2111. For example, the contour surrounded by the second edge portion 2111 may coincide with the contour of the outer surface of the housing 212. When the end cap 211 is provided to cover the opening of the housing 212, the inner surface of the second edge portion 2111 abuts against the outer surface of the housing 212. Also, for example, at least one second edge portion 2111 may be provided on each of both sides of the end cap 211 in the X-axis direction, and at least one second edge portion 2111 may be provided on each of both sides 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, the occupation of the internal space of the housing 212 is reduced, and a larger-sized electrode assembly 26 can be accommodated inside the housing 212, thereby increasing the energy density of the battery cell 20. Further, the second edge portion 2111 functions as a barrier and can prevent the high-temperature welding slag generated during welding from entering the inside of the housing 21.

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

[0112] In this embodiment, when the end cap 211 covers the opening, 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 be closely fitted.

[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, facilitating the stacking of a plurality of battery cells 20.

[0114] According to some embodiments of the present application, referring to FIGS. 17 to 18, FIG. 17 is a schematic structural diagram of a thickened housing 212 provided according to some embodiments of the present application, and FIG. 18 is an enlarged view of the F portion of FIG. 17. The housing 212 has an inner surface, an outer surface, and two end faces. The inner surface and the outer surface are provided opposite to each other, and the two end faces are provided opposite to each other along a first direction. The two end caps 211 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 L 1 and, along the first direction, the end cap 211 has a connection portion overlapping with the end face, and the thickness of the connection portion is L 2 and L 1 >L 2 is true.

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

[0116] The distance L between the inner surface and the outer surface 1 reflects the area overlapping with the end cap 211 of the end face. When the dimensions of the housing 212 are constant, the larger L 1 is, the larger the area of the end face becomes, and furthermore, the larger the contact area between the end cap 211 and the end face becomes.

[0117] L 1 ≤L 2 In the case of, the contact area between the end cap 211 and the end face is too small, which will reduce the structural strength of the housing 21.

[0118] L 1 >L 2 In the case of, it is equivalent to increasing the thickness of the housing 212, and furthermore, the structural strength of the housing 21 is enhanced. On the other hand, the contact area at the connection location between the end cap 211 and the housing 212 increases, the connection strength between the housing 212 and the end cap 211 is enhanced, and the risk of melting and dropping defects occurring during the welding of the end cap 211 and the housing 212 decreases.

[0119] According to some embodiments of the present application, referring to FIGS. 19 to 20, FIG. 19 is a fitting schematic diagram of the housing 212 and the end cap 211 provided by some embodiments of the present application, FIG. 20 is an enlarged view of the G position in FIG. 19, and the thickness of the end cap 211 is D 1 and the thickness of the housing 212 is D 2 and 50 μm ≤ D 1 ≤ 200 μm, and / or, 50 μm ≤ D 2 ≤ 200 μm is satisfied.

[0120] D 1 or D 2 If it is greater than 200 μm, the thickness of the housing 21 formed by the end cap 211 and the housing 212 is too large. In the situation where the dimensions of the housing 21 do not change, the volume of the accommodation 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] D 1 or D2 When it is less than 50 μm, the strength of the end cap 211 and the housing 212 decreases, and furthermore, the strength of the housing 21 decreases.

[0122] In this embodiment, D 1 and D 2 may simultaneously be in the range of 50 μm or more and 200 μm or less, and D 1 or only D 2 may satisfy the above range.

[0123] When the thickness D of the end cap 211 1 satisfies 50 μm ≤ D 1 ≤ 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. When the thickness D of the housing 212 2 satisfies 50 μm ≤ D 2 ≤ 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 D 1 and the thickness of the housing 212 is D 2 and satisfies 70 μm ≤ D 1 ≤ 150 μm, and / or 70 μm ≤ D 2 ≤ 150 μm.

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

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

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

[0128] A coating may be provided on the surface of the stainless steel. For example, an insulating layer may be provided on the surfaces of the housing 212 and the end cap 211 so as to electrically insulate between the housing 21 and the electrode assembly 26, and the reliability of the battery cell 20 is enhanced. A nickel plating layer may be further provided on the surfaces of the housing 212 and the end cap 211. The nickel plating layer enhances the wear resistance and corrosion resistance of the housing 21, and further extends the service life of the housing 21.

[0129] The stainless steel material has high strength and fatigue strength, and can reduce the wall thickness of the housing 21 formed by the housing 212 and the end cap 211. An electrode assembly 26 with larger dimensions can be accommodated in the housing 21, and the energy density of the battery cell 20 is enhanced. On the other hand, stainless steel has good corrosion resistance, and the service life of the housing 21 is extended.

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

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

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

[0133] In the above technical solution, the end cap 211 and the housing 212 are connected by welding, which has the advantage of high connection strength. On the other hand, after welding, the contour of the connection part 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, the embodiments of the present application further provide a battery cell 20 including the housing 21 and the electrode assembly 26 in the above embodiments. The electrode assembly 26 is accommodated in the housing 21.

[0135] According to some embodiments of the present application, referring to FIG. 21, FIG. 21 is a schematic structural diagram of an electrode terminal 25 provided by some embodiments of the present application. The housing 212 has a wall portion, and a lead-out hole is provided in the wall portion. The lead-out hole penetrates the wall portion along the thickness direction of the wall portion. The battery cell 20 further includes an electrode terminal 25. The electrode terminal 25 is electrically connected to the electrode assembly 26. The electrode terminal 25 includes a terminal body 252, a first restricting portion 253, and a second restricting portion 251. The terminal body 252 is disposed in the lead-out hole. Along the thickness direction of the wall portion, the first restricting portion 253 and the second restricting portion 251 are respectively connected to both ends of the terminal body 252, and the first restricting portion 253 and the second restricting portion 251 are respectively located on both sides of the wall portion so as to fix the terminal body 252.

[0136] The wall portion may be any one of the side walls of the housing 212. Since the housing 212 has two openings and a large working space, providing the lead-out hole in the wall portion 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 may be formed by riveting the terminal body 252 to the wall portion, that is, by applying a force along the axial direction of the terminal body 252 to both ends of the terminal body 252, and expanding both ends of the terminal body 252 along the radial direction of the terminal body 252. The wall portion can be partially sandwiched between the first restricting portion 253 and the second restricting portion 251, thereby fixing the terminal body 252 to the wall portion.

[0138] The first regulating portion 253 and the second regulating portion 251 may be independent members. For example, screws may be provided on the peripheral wall of the terminal body 252, screw holes may be provided in the first regulating portion 253 and the second regulating portion 251, and by fitting the terminal body 252 into the screw holes, the first regulating portion 253 and the second regulating portion 251 can be screwed to the terminal body 252.

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

[0140] According to some embodiments of the present application, referring to FIG. 21, the battery cell 20 further includes a current collecting member 22 that connects the electrode terminal 25 and the electrode assembly 26. A second lead-out hole is provided in the current collecting member 22, the terminal body 252 is formed in the second lead-out hole, and along the thickness direction of the wall portion, the first regulating portion 253 is located within the housing 21, and the current collecting member 22 is at least partially located between the first regulating portion 253 and the wall portion.

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

[0142] By providing the current collecting member 22 partially between the first regulating portion 253 and the wall portion, the first regulating portion 253 can not only connect the current collecting member 22 to the terminal body 252, but also electrically connect the terminal body 252 and the current collecting member 22, eliminating the need to weld the terminal body 252 and the current collecting member 22, and reducing the risk of damaging the structure of the housing 212 by melting the housing 212 during welding. Also, since welding is not required, the assembly process is simplified and the manufacturing efficiency is improved.

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

[0144] The first insulating member 23 may be a sheet-like object made of plastic or rubber, and a third lead-out hole may be provided in the first insulating member 23. By sequentially drilling the terminal body 252 through the first lead-out hole, the third lead-out hole, and the second lead-out hole, the first insulating member 23 can be sandwiched between the wall portion and the current collecting member 22.

[0145] By insulating the current collecting member 22 from the wall portion, the first insulating member 23 reduces the risk of a short circuit between the two and enhances the reliability of the battery cell 20.

[0146] According to some embodiments of the present application, referring to FIG. 21, the battery cell 20 further includes a second insulating member 24. Along the thickness direction of the wall portion, the second insulating member 24 is at least partially located between the wall portion and the 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-like object made of plastic or rubber, and a fourth lead-out hole may be provided in the second insulating member 24. By drilling the terminal body 252 through the fourth lead-out hole, 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 surface of the second insulating member 24 facing the second restricting portion 251, and the second restricting portion 251 may be at least partially provided in the counterbore, whereby the second insulating member 24 and the second restricting portion 251 are positioned to fit together.

[0149] The second insulating member 24 insulates the second regulating portion 251 from the wall portion, thereby reducing the risk of a short circuit between the two and enhancing the reliability of the battery cell 20.

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

[0151] According to some embodiments of the present application, the embodiments of the present application further provide an electrical consumer device including the battery 100 in the above embodiment for providing electrical energy. Alternatively, the electrical consumer device can include the battery cell 20 in the above embodiment for providing electrical energy.

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

[0153] The housing body 212 has a rectangular structure and includes a plurality of side walls whose ends are sequentially connected. The plurality of side walls surround to form the two openings, and the area of the openings is larger than the area of the outer surface of each side wall.

[0154] Finally, it should be noted that the above embodiments are only used 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 above embodiments, as can be understood by those skilled in the art, it is still possible to modify the technical solutions described in the above embodiments, or perform equivalent substitution on some or all of their technical features. By these modifications and substitutions, the essence of the corresponding technical solutions does not deviate from the scope of the technical solutions of the embodiments of the present application, and all these modifications and substitutions should be included in the scope of the claims and the specification of the present application. In particular, as long as the structures do not conflict, all the technical features mentioned in each embodiment can be combined in any form. The present application is not limited to the specific embodiments disclosed in the specification, but is intended to include all the technical solutions within the scope of the claims.

Description of Reference Numerals

[0155] 10 Box 11 First Part 12 Second Part 20 Battery Cell 21 Housing 211 End Cap 2111 Second Edge Portion 2112 Convex Portion 212 Enclosure 2121 First Side Wall 2122 Second Side Wall 2123 Third Side Wall 2124 Fourth Side Wall 2125 First Edge Portion 22 Current Collector Member 23 First Insulating Member 24 Second Insulating Member 25 Electrode Terminal 251 Second Restricting Portion 252 Terminal Body 253 First Restricting Portion 26 Electrode Assembly 100 Battery 200 Controller 300 Motor 1000 vehicles

Claims

1. A housing including a housing body having two openings provided to face each other along a first direction; Two end caps connected to both ends of the housing body along the first direction respectively, each sealing one of the two openings, and surrounding the housing body together to form a receiving space for receiving an electrode assembly; A housing, characterized by including the above.

2. The housing body includes a plurality of side walls connected end to end in sequence, the plurality of side walls surround to form the two openings, and the area of the openings is larger than the area of the outer surface of each side wall. The housing according to Claim 1, characterized by this.

3. The plurality of side walls include a first side wall, a second side wall, a third side wall and a fourth side wall connected end to end in sequence; Along a second direction, the first side wall and the third side wall are provided to face each other; Along a third direction, the second side wall and the fourth side wall are provided to face each other; The first direction, the second direction and the third direction are perpendicular to each other in pairs. The housing according to Claim 2, characterized by this.

4. Along the first direction, a first edge portion is provided at at least one end of the housing body to surround the opening, and the first edge portion is used for connection to the end cap. The housing according to any one of Claims 1 to 3, characterized by this.

5. Along the first direction, the first edge portion is provided at both ends of the housing body, and the two end caps are respectively connected to the two first edge portions. The housing according to Claim 4, characterized by this.

6. The first edge portion protrudes from the outer surface of the housing body, or the first edge portion protrudes from the inner surface of the housing body. The housing according to Claim 4 or 5, characterized by this.

7. Along the first direction, a convex portion is provided on the surface of the end cap facing the housing body, the convex portion is at least partially located inside the housing body, and is positioned to fit into the housing body. The housing according to any one of Claims 1 to 6, characterized by this.

8. 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 projects from the surface of the end cap facing the housing, and the second edge portion is used for connecting to the housing. The housing according to any one of claims 1 to 7, characterized in that.

9. The housing according to claim 8, characterized in that the second edge portion is provided on both of the two end caps.

10. The housing according to claim 8 or 9, characterized in that 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.

11. 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 the 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 L １ Along the first direction, the end cap has a connecting portion overlapping the end face, and the thickness of the connecting portion is L ２ where L １ > L ２ The housing according to any one of claims 1 to 10, characterized in that this is the case.

12. The thickness of the end cap is D １ and the thickness of the housing is D ２ where 50 μm ≤ D １ ≤ 200 μm, and / or 50 μm ≤ D ２ ≤ 200 μm, and the housing according to any one of claims 1 to 11, characterized in that it satisfies the above conditions.

13. The housing according to any one of claims 1 to 11, characterized in that the housing and / or the end cap contains stainless steel.

14. The housing according to any one of claims 1 to 11, characterized in that the end cap is welded to the housing.

15. The housing according to any one of claims 1 to 14, an electrode assembly housed in the housing, A battery cell, characterized in that it comprises.

16. The housing has a wall portion, a lead-out hole is provided in the wall portion, and the lead-out hole penetrates the wall portion along the thickness direction of the wall portion. The battery cell further includes an electrode terminal, the electrode terminal is electrically connected to the electrode assembly, the electrode terminal includes a terminal body, a first restricting portion and a second restricting portion, the terminal body is formed in the lead-out hole, and along the thickness direction of the wall portion, the first restricting portion and the second restricting portion are respectively connected to both ends of the terminal body, and the first restricting portion and the second restricting portion are located on both sides of the wall portion so as to fix the terminal body. The battery cell according to claim 15, characterized in that.

17. The battery cell further includes a current collecting member that connects the electrode terminal and the electrode assembly. The current collecting member is provided with a second lead-out hole, the terminal body is bored in the second lead-out hole, and along the thickness direction of the wall portion, the first restricting portion is located within the housing, and the current collecting member is at least partially located between the first restricting portion and the wall portion. The battery cell according to claim 16, characterized in that.

18. A battery comprising the battery cell according to any one of claims 15 to 17.

19. An electric power consuming device comprising the battery according to claim 18.

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