Battery and electric device

Abstract

The utility model provides a battery and a power utilization device, the battery comprises a plurality of battery monomers, the plurality of battery monomers are stacked along a first direction, each battery monomer comprises a shell and an electrode leading-out assembly, the electrode leading-out assembly is arranged on a first wall of the shell, and the electrode leading-out assembly is used for leading out electric energy of the battery monomers; the confluence piece is connected with the electrode leading-out assemblies of the two battery monomers; wherein the electrode leading-out assembly is provided with a limiting part, and the limiting part is used for limiting the bus piece. According to the technical scheme, the limiting part of the electrode lead-out assembly directly limits the bus piece, so that the assembly process of the battery is effectively simplified, and the assembly efficiency of the battery is remarkably improved.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and more particularly, to a battery and an electrical device using the same. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] In battery production, how to improve the battery assembly efficiency is an urgent problem to be solved. Summary of the Invention

[0004] The present application provides a battery and an electrical device using the same, and the battery is beneficial to improving the assembly efficiency.

[0005] In a first aspect, the present application provides a battery, including: a plurality of battery cells stacked in a first direction; each battery cell includes a housing and an electrode lead-out assembly disposed on a first wall of the housing, and the electrode lead-out assembly is configured to lead out the electrical energy of the battery cell; a bus bar connecting the electrode lead-out assemblies of two battery cells; wherein, the electrode lead-out assembly is provided with a limiting portion for limiting the bus bar.

[0006] In the technical solution of the present application, the bus bar connects the electrode lead-out assemblies of two battery cells, and the limiting portion of the electrode lead-out assembly directly limits the bus bar, so that the relative position between the bus bar and the electrode lead-out assembly is defined. The battery structure effectively simplifies the assembly process, thereby significantly improving the battery assembly efficiency.

[0007] According to some embodiments of the present application, the electrode lead-out assembly includes a conductive member and a first insulating member, the conductive member is connected to the bus bar, and the first insulating member insulates and isolates the conductive member from the first wall; the limiting portion is disposed on the first insulating member or the conductive member.

[0008] In the above technical solution, the electrode lead-out assembly includes a conductive member and a first insulating member. The conductive member is connected to the bus bar to lead out the electrical energy of the battery cell, and the first insulating member insulates and isolates the conductive member from the first wall, effectively avoiding a short circuit between the conductive member and the housing. The limiting portion is disposed on the first insulating member or the conductive member to limit the position of the bus bar connected to the conductive member.

[0009] According to some embodiments of the present application, the battery cell includes an electrode assembly received in the housing, and the electrode assembly has a tab; the conductive member includes a first portion parallel to the first wall and electrically connected to the tab, and a second portion connected to the bus bar, and a plane where a connection surface of the second portion and the bus bar intersects the first wall.

[0010] In the above technical solution, the conductive part includes a first part electrically connected to the pole ear of the electrode assembly and a second part connected to the bus bar, wherein the plane where the connection surface of the second part and the bus bar is located intersects with the first wall, so as to facilitate the connection between the electrode lead-out assembly and the pole ear and the connection between the electrode lead-out assembly and the bus bar in two different directions, thereby facilitating the bus bar connection operation and improving the assembly efficiency of the battery; and the pole ear and the bus bar are connected to two different parts of the conductive part, thereby avoiding mutual influence on the stability of the pole ear and the bus bar connected to the conductive part, thereby facilitating battery maintenance.

[0011] According to some embodiments of the present application, the second part includes a first section, a second section and a third section, the first section extends from the first part in a direction away from the first wall, the second section connects the first section and the third section at an end of the first section away from the first wall, the third section extends from the second section in a direction close to the first wall, and the collector is connected to a side of the third section away from the first section.

[0012] In the above technical solution, the conductive part includes a first section, a second section and a third section. The conductive part of this structure has a certain margin of activity, which can effectively release the force brought to the conductive part or the busbar by the later expansion of the battery cell, and play a good role in buffering the expansion force. In addition, the first section extends from the first part in the direction away from the first wall, which expands the space for the third section in the direction away from the first wall. The third section extends from the second section in the direction close to the first wall, so that the third section has enough area and space to connect with the busbar in the direction away from the first wall, which facilitates the connection operation between the third section and the busbar, and also ensures the reliability of the connection between the third section and the busbar, and improves the current carrying capacity of the connection.

[0013] According to some embodiments of the present application, the first insulating member includes a body and a protrusion, the body is arranged between the first wall and the conductive member, the protrusion protrudes from the body along the thickness direction of the first wall, and the protrusion is inserted between the first section and the third section.

[0014] In the above technical solution, the main body of the first insulating member is arranged between the first wall and the conductive member to effectively insulate and isolate the conductive member and the first wall. At the same time, the protrusion of the first insulating member is inserted between the first section and the second section of the conductive member. The protrusion supports the second section of the U-shaped structure of the conductive member, effectively enhancing the structural strength of the second section of the conductive member; at the same time, the protrusion can effectively bear the clamping force of the busbar connected to the third section, thereby effectively ensuring the force stability of the conductive member.

[0015] According to some embodiments of the present application, the limiting portion is arranged on the protrusion and / or the main body.

[0016] In the above technical solution, the limiting part is arranged on the first insulating part and located on the protruding part and / or the body of the first insulating part. Compared with the structure in which the limiting part is arranged on the conductive part, it can effectively prevent the limiting part from occupying and interfering with the connection surface between the bus bar and the conductive part, thereby effectively ensuring the operation convenience and connection stability of the connection between the bus bar and the conductive part.

[0017] According to some embodiments of the present application, the electrode lead-out assembly further includes: an electrode terminal, an electrode lead-out hole is provided on the first wall, the electrode terminal passes through the electrode lead-out hole, the conductive part is arranged on the outer side of the first wall, and the first part and the tab are electrically connected through the electrode terminal.

[0018] In the above technical solution, the electrode lead-out assembly further includes an electrode terminal penetrating through the first wall, the first part of the conductive part and the tab of the electrode assembly are connected through the electrode terminal, and the electrode terminal leads the electric energy of the electrode assembly from inside the battery cell to outside the battery cell, which is convenient for the electrical connection between the conductive part and the tab of the electrode assembly.

[0019] According to some embodiments of the present application, the limiting part is configured to guide the bus bar to move along a second direction, and the second direction intersects with the first direction and intersects with the connection surface.

[0020] In the above technical solution, the limiting part is configured to guide the bus bar to move along the second direction. During the battery assembly process, the arrangement of the limiting part is convenient for guiding the bus bar to approach the conductive part along the second direction and restricting the movement of the bus bar in the plane perpendicular to the second direction, thereby effectively reducing the risk that the bus bar is separated from the electrode lead-out assembly under the influence of forces such as gravity after being limited by the limiting part.

[0021] According to some embodiments of the present application, the bus bar is provided with a limiting and mating part, and the limiting and mating part cooperates with the limiting part.

[0022] In the above technical solution, the bus bar is provided with a limiting and mating part, and the limiting and mating part of the bus bar cooperates with the limiting part of the electrode lead-out assembly to further improve the stability of the electrode lead-out assembly in limiting the bus bar.

[0023] According to some embodiments of the present application, the limiting part includes a protrusion, the limiting and mating part includes a recess, and / or, the limiting part includes a recess, and the limiting and mating part includes a protrusion.

[0024] In the above technical solution, the limiting part and the limiting and mating part adopt a structure of cooperation between a protrusion and a recess. On the one hand, the cooperation between the protrusion and the recess has good limiting performance and can ensure the limitation of the relative position of the bus bar. On the other hand, the cooperation between the protrusion and the recess is simple in assembly and easy to implement, which can further simplify the assembly of the bus bar and improve the battery assembly efficiency.

[0025] According to some embodiments of the present application, the electrode lead-out assembly is provided with a plurality of limiting portions, and the current collector is provided with a plurality of limiting and mating portions, and the limiting and mating portions correspond to the limiting portions one by one.

[0026] In the above technical solution, the electrode lead-out assembly and the current collector are provided with a plurality of corresponding limiting portions and limiting and mating portions, so as to form multi-point and multi-directional limiting on the current collector, and further improve the limiting stability of the current collector.

[0027] According to some embodiments of the present application, the plurality of limiting and mating portions are arranged at intervals in a third direction, and the third direction intersects with the first direction.

[0028] In the above technical solution, the plurality of limiting and mating portions are arranged at intervals in the third direction, so that the current collector forms multi-point limiting in the third direction.

[0029] According to some embodiments of the present application, the plurality of limiting and mating portions are distributed at both ends of the current collector along the third direction.

[0030] In the above technical solution, the plurality of limiting and mating portions are distributed at both ends of the current collector along the third direction, so as to more stably limit the movement of the current collector along the third direction. Moreover, the structure in which the plurality of limiting and mating portions are distributed at both ends of the current collector facilitates the simplification of the structure of the current collector, and avoids that the limiting and mating portions excessively occupy the area of the connection surface of the current collector for connecting with the electrode lead-out assembly, thereby effectively ensuring the connection stability between the current collector and the electrode lead-out assembly.

[0031] According to some embodiments of the present application, the current collector includes: a bottom wall; two side walls, the two side walls are arranged opposite to each other in the first direction, and the bottom wall connects the two side walls; two flanging portions, the two flanging portions are correspondingly arranged with the two side walls, each flanging portion extends from the end of the corresponding side wall away from the bottom wall in a direction away from the other side wall, and the two flanging portions are respectively connected to the electrode lead-out assemblies of the two battery cells.

[0032] In the above technical solution, the overall current collector has a U-shaped structure, which effectively improves the structural strength of the current collector itself. At the same time, the two flanging portions of the current collector are connected to the electrode lead-out assemblies of the two battery cells, and the side walls and the bottom wall of the U-shaped current collector form a stepped surface, so that the current collector has a certain amount of movement margin, which can effectively release the force brought by the later expansion of the battery cell to the current collector, and play a good role in buffering the expansion force.

[0033] According to some embodiments of the present application, the limiting and mating portion is arranged on the flanging portion.

[0034] In the above technical solution, the limiting and mating portion is arranged on the flanging portion, and the flanging portion is connected to the electrode lead-out assembly, that is, the limiting portion directly acts on the flanging portion of the current collector to limit the part of the current collector connected to the electrode lead-out assembly, thereby effectively ensuring the limiting accuracy and connection accuracy of the current collector.

[0035] According to some embodiments of the present application, along the second direction, the distance from the flanging portion to the bottom wall is D1, satisfying 2 mm ≤ D1 ≤ 10 mm, preferably, 4 mm ≤ D1 ≤ 6 mm; the second direction is perpendicular to the bottom wall.

[0036] In the above technical solution, if the distance from the flanging portion to the bottom wall is too large, the distance between the bottom wall of the current collector and the battery cell is relatively large, and the current collector will occupy a large amount of space around the battery cell; if the distance from the flanging portion to the bottom wall is too small, the margin of force deformation of the current collector is too small, which is not conducive to effectively exerting the buffering and expansion force of the current collector; by controlling the distance from the flanging portion to the bottom wall between 2 mm and 10 mm, while ensuring that the current collector has a good buffering and expansion force effect, the current collector can be prevented from occupying a large amount of battery space.

[0037] According to some embodiments of the present application, the current collector is connected to the electrode lead-out assembly to form a connection area, and the dimension of the connection area along the first direction is D2, satisfying 3 mm ≤ D2 ≤ 10 mm, preferably, 4 mm ≤ D2 ≤ 6 mm.

[0038] In the above technical solution, the width dimension of the connection area along the first direction is D2. If D2 is too large, the area of the connection surface that needs to be reserved for the current collector and the electrode lead-out piece is too large. Correspondingly, the current collector and the electrode lead-out assembly will occupy a large amount of space around the battery cell, which is not conducive to improving the space utilization rate of the battery; if D2 is too small, the width of the connection area is too small, and the connection strength and connection stability between the current collector and the electrode lead-out assembly cannot be guaranteed; the technical solution of the present application limits the width of the connection area between the current collector and the electrode lead-out assembly between 3 mm and 10 mm, which can effectively ensure the connection strength and connection stability between the current collector and the electrode lead-out assembly while avoiding excessive occupation of battery space.

[0039] According to some embodiments of the present application, the first direction is parallel to the thickness direction of the first wall.

[0040] In the above technical solution, the first direction is parallel to the thickness direction of the first wall, that is, the first wall is located on one side of the battery cell along the first direction. Then, the electrode lead-out assembly is arranged on the first wall and located on one side of the battery cell along the stacking direction of the battery cells, which can further reduce the occupation rate of the top space of the battery cell by the current collector and the electrode lead-out assembly, thereby being beneficial to improving the energy density of the battery.

[0041] According to some embodiments of the present application, the first wall is the wall with the largest area among all the walls of the outer shell.

[0042] In the above technical solution, the first wall is the large surface of the outer shell. That is to say, the electrode lead-out assembly is arranged on the large surface of the battery cell and is located on one side of the battery cell along its stacking direction. Compared with the traditional structure in which the electrode lead-out assembly is arranged on the narrow surface of the battery cell, the technical solution of the present application can effectively ensure the stability of the size structure of the electrode lead-out assembly, so as to ensure that the electrode lead-out assembly can meet the over-current requirement of the battery cell.

[0043] According to some embodiments of the present application, the outer shell further includes a second wall disposed opposite to the first wall. A first region at the edge of the second wall is recessed to form a recess, and the recess is used to accommodate at least a part of the electrode lead-out assembly of the battery cell adjacent to the second wall.

[0044] In the above technical solution, after a plurality of battery cells are stacked in the first direction, the electrode lead-out assembly is arranged on the first wall, and at the same time, the electrode lead-out assembly is accommodated in the recess formed on the second wall of the adjacent battery cell. This structural arrangement is beneficial to further reduce the space occupancy rate of the electrode lead-out assembly, thereby further improving the structural compactness of the battery and being beneficial to improving the energy density of the battery; at the same time, the setting of the recess plays a certain protective role for the electrode lead-out assembly and the connection area where the electrode lead-out assembly is connected to the bus bar, reducing the risk that the electrode lead-out assembly bears uncontrollable external forces, thereby effectively improving the structural stability of the electrode lead-out assembly and the connection stability with the bus bar.

[0045] According to some embodiments of the present application, the outer shell includes a housing and an end cover. The housing has an opening, and the end cover closes the opening. The first wall is the end cover.

[0046] In the above technical solution, the first wall is the end cover, and the electrode lead-out assembly is arranged on the end cover of the outer shell, which is beneficial to improving the assembly convenience of the electrode lead-out assembly installed on the first wall.

[0047] In a second aspect, the present application further provides an electrical device, including the battery according to any of the above solutions, and the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0049] Figure 1 It is a schematic structural diagram of a vehicle provided for some embodiments of the present application;

[0050] Figure 2 It is an exploded view of a battery provided for some embodiments of the present application;

[0051] Figure 3 An axonometric view of the connection relationship between a battery cell and a bus bar provided in some embodiments of the present application;

[0052] Figure 4 For Figure 3 A partially enlarged schematic view of part A shown;

[0053] Figure 5 A schematic structural view of a conductive member provided in some embodiments of the present application;

[0054] Figure 6 A schematic structural view of a first insulating member provided in some embodiments of the present application;

[0055] Figure 7 A front view of the connection relationship between a battery cell and a bus bar provided in some embodiments of the present application;

[0056] Figure 8 For Figure 7 A partial sectional view taken along the B-B direction shown;

[0057] Figure 9 For Figure 8 A partially enlarged view of part C shown;

[0058] Figure 10 A front view of the cooperation between a limiting portion and a limiting cooperation portion provided in some embodiments of the present application;

[0059] Figure 11 A front view of the cooperation between a limiting portion and a limiting cooperation portion provided in some other embodiments of the present application;

[0060] In the drawings, the drawings are not drawn to actual scale.

[0061] Marking description: 1000 - vehicle; 100 - battery; 10 - battery cell; 11 - housing; 111 - first wall; 112 - casing; 113 - second wall; 1131 - recessed portion; 12 - electrode lead-out assembly; 121 - conductive member; 121a - first part; 121b - second part; 1211 - first connection surface; 1212 - first section; 1213 - second section; 1214 - third section; 122 - first insulating member; 1221 - body; 1222 - protruding portion; 1223 - first surface; 1224 - recessed area; 123 - electrode terminal; 124 - second insulating member; 13 - limiting portion; 14 - electrode assembly; 15 - adapter; 141 - tab; 20 - bus bar; 21 - bottom wall; 211 - second surface; 22 - side wall; 23 - flanging portion; 231 - second connection surface; 24 - limiting cooperation portion; 30 - box body; 31 - first box body; 32 - second box body; 40 - connection surface; 200 - controller; 300 - motor;

[0062] X - The first direction; Y - The second direction; Z - The third direction. Detailed implementation manners

[0063] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application usually described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0064] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts fall within the scope of protection of the present application.

[0065] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, and thus are only examples and cannot be used to limit the protection scope of the present application.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0067] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0068] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0069] In the description of the embodiments of the present application, the term "plurality" means two or more (including two).

[0070] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0071] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "arrange", "install", "connect", "couple", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection, or a signal connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0072] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted. It should be understood that the thickness, length, width and other dimensions of various components shown in the drawings in the embodiments of the present application, as well as the overall thickness, length, width and other dimensions of the integrated device are only for illustrative purposes and should not constitute any limitation to the present application.

[0073] In the present application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the embodiments of the present application do not limit this. The battery cell may be in the shape of a flat body, a cuboid or other shapes, and the embodiments of the present application also do not limit this.

[0074] The battery mentioned in the embodiments of the present application refers to a single physical module that includes one or more battery cells to provide a higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack, etc. Among them, multiple battery cells can be directly connected in series, parallel, or in a hybrid connection to form a battery. The hybrid connection means that there are both series and parallel connections among multiple battery cells. Multiple battery cells can also be first connected in series, parallel, or in a hybrid connection to form a battery cell group, and then multiple battery cell groups are connected in series, parallel, or in a hybrid connection to form a battery. The battery may include a box for encapsulating one or more battery cells. The box can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0075] The battery further includes a busbar for electrical connection between multiple battery cells to achieve series, parallel, or hybrid connection of multiple battery cells.

[0076] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly operates by the movement of metal ions between the positive electrode tab and the negative electrode tab. The positive electrode tab includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The positive current collector without the coated positive active material layer protrudes from the positive current collector with the coated positive active material layer. The positive current collector without the coated positive active material layer serves as the positive electrode ear. Taking a lithium-ion battery as an example, the material of the positive current collector can be aluminum, and the positive active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate, etc. The negative electrode tab includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector. The negative current collector without the coated negative active material layer protrudes from the negative current collector with the coated negative active material layer. The negative current collector without the coated negative active material layer serves as the negative electrode ear. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that large currents can pass through without fusing, the number of positive electrode ears is multiple and stacked together, and the number of negative electrode ears is multiple and stacked together. The material of the separator can be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly can be a wound structure or a stacked structure, and the embodiments of the present application are not limited thereto.

[0077] The development of battery production technology needs to make progress in many aspects, such as energy density, production efficiency, etc.

[0078] For some existing technology batteries, their structures and assembly processes are complex, which is not conducive to improving the production efficiency of the batteries.

[0079] The inventor analyzed the reasons and noticed that a conventional battery includes a wire harness separator, a bus bar, and battery cells. The bus bar is fixed and limited by the wire harness separator, and then the bus bar fixed on the wire harness separator is connected to the electrode lead-out component of the battery cell. The battery has many components and a complex structure, resulting in a cumbersome assembly process and being unfavorable for improving the battery assembly efficiency.

[0080] Based on the above problems, in order to improve the battery assembly efficiency, the applicant provides a battery, in which a limiting part is provided on the electrode lead-out assembly to directly limit the bus bar connecting the electrode lead-out assemblies of two battery cells.

[0081] In such a battery, the limiting part is provided on the electrode lead-out assembly to limit the bus bar, so that the relative position between the bus bar and the electrode lead-out assembly is defined, effectively simplifying the assembly process, and thus significantly improving the battery assembly efficiency.

[0082] In some embodiments, the wire harness separator for limiting the bus bar in the traditional battery can also be cancelled, thereby effectively simplifying the overall structure of the battery and being beneficial to improving the energy density of the battery.

[0083] In some embodiments, when the battery subsequently performs the connection operation between the bus bar and the electrode lead-out assembly, it is not necessary to specifically set up a positioning tooling to position the bus bar, thereby further simplifying the process and improving the battery assembly efficiency.

[0084] The battery disclosed in the embodiments of the present application can be but is not limited to being used in electrical equipment such as vehicles, ships, or aircraft, and the battery disclosed in the present application can be used to form the power supply system of the electrical equipment.

[0085] The embodiments of the present application provide an electrical device using a battery as a power source. The electrical device can be but is not limited to mobile phones, tablets, laptop computers, electric toys, electric tools, battery cars, electric vehicles, ships, spacecraft, etc. Among them, the electric toys can include fixed or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric aircraft toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0086] The battery described in the embodiments of the present application is not only limited to being applicable to the above-described electrical devices, but can also be applicable to all electrical devices using batteries. However, for the sake of brevity of description, the following embodiments take a vehicle as an example of an electrical device in an embodiment of the present application for illustration.

[0087] Please refer to Figure 1 , Figure 1Schematic structural diagram of vehicle 1000 provided by some embodiments of the present application. Vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is disposed inside vehicle 1000. The battery 100 can be disposed at the bottom, head or tail of vehicle 1000. The battery 100 can be used for power supply of vehicle 1000. For example, the battery 100 can be used as the operating power source of vehicle 1000. Vehicle 1000 can also 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 for the working power requirements during the start, navigation and driving of vehicle 1000.

[0088] In some other embodiments, the battery 100 can not only be used as the operating power source of vehicle 1000, but also be used as the driving power source of vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1000.

[0089] As Figure 2 shown, Figure 2 An exploded view of the battery 100 provided by some embodiments of the present application is shown. The battery 100 includes a plurality of battery cells 10 and a box body 30. The battery cells 10 are accommodated in the box body 30. The box body 30 is used to provide an accommodation space for the battery cells 10. The box body 30 can adopt various structures. In some embodiments, the box body 30 can include a first box body 31 and a second box body 32. After the first box body 31 and the second box body 32 are covered with each other, a battery cavity is formed. A plurality of battery cells 10 are placed in the battery cavity. Among them, the shapes of the first box body 31 and the second box body 32 can be determined according to the shape of the combination of the plurality of battery cells 10. The first box body 31 and the second box body 32 can each have an opening. For example, both the first box body 31 and the second box body 32 can be hollow cuboids and each has only one surface as the opening surface. The openings of the first box body 31 and the second box body 32 are arranged oppositely, and the first box body 31 and the second box body 32 are buckled with each other to form the box body 30 with a closed chamber.

[0090] The battery 100 can also include a busbar 20. A plurality of battery cells 10 are connected in parallel, in series or in a mixed connection through the busbar 20 and then placed in the box body 30 formed after the first box body 31 and the second box body 32 are buckled.

[0091] Please refer to Figures 3 to 7 , Figure 3 An isometric view of the connection relationship between the battery cell and the busbar provided by some embodiments of the present application, Figure 4 is Figure 3 a partially enlarged schematic view of part A shown in Figure 4 is Figure 3 a partially enlarged schematic view of part A shown in Figure 5Schematic structural diagram of a conductive member provided by some embodiments of the present application Figure 6 Schematic structural diagram of a first insulating member provided by some embodiments of the present application Figure 7 Front view of the connection relationship between a battery cell and a bus bar provided by some embodiments of the present application Figure 8 is Figure 7 Partial sectional view taken along line B-B shown in Figure 9 is Figure 8 Partial enlarged view of part C shown in

[0092] Some embodiments of the present application provide a battery 100, as shown in Figure 3 and Figure 4 shown. The battery 100 includes a plurality of battery cells 10 and a bus bar 20. The plurality of battery cells 10 are stacked along a first direction X. The battery cell 10 includes a housing 11 and an electrode lead-out assembly 12. The electrode lead-out assembly 12 is disposed on a first wall 111 of the housing 11. The electrode lead-out assembly 12 is used to lead out the electric energy of the battery cell 10. The bus bar 20 connects the electrode lead-out assemblies 12 of two battery cells 10. Among them, the electrode lead-out assembly 12 is provided with a limiting portion 13, and the limiting portion 13 is used to limit the bus bar 20.

[0093] The housing 11 can be in various structural forms. In some embodiments, the housing 11 may include a housing body 112 and a cover body. The housing body 112 is a hollow structure with an opening on one side. The cover body is covered on the opening of the housing body 112 and forms a sealed connection to form a sealed space for accommodating the electrode assembly, electrolyte and other related components of the battery cell 10.

[0094] Among them, the housing 11 includes a first wall 111. The first wall 111 can be any wall portion of the housing 11. In the implementation form where "the housing 11 includes a housing body 112 and a cover body", the first wall 111 can be the cover body or any wall portion of the housing body 112.

[0095] The electrode lead-out assembly 12 is used to lead out the electric energy of the battery cell 10. In a broad sense, the electrode lead-out assembly 12 is used to output or input the electric energy of the battery cell 10.

[0096] It can be understood that each battery cell may include a positive electrode lead-out assembly and a negative electrode lead-out assembly. The electrode lead-out assembly 12 in the embodiments of the present application can be either the positive electrode lead-out assembly of the battery cell 10 or the negative electrode lead-out assembly of the battery cell 10.

[0097] The bus bar 20 is a component that can connect multiple battery cells 10 in series or in parallel to achieve electrical connection between the multiple battery cells 10. The bus bar 20 can also be referred to as a bus bar, a tab, or a bus bar strip. The bus bar 20 is generally a metal sheet-like structure. The bus bar 20 and the electrode lead-out assembly 12 can be connected by welding, conductive adhesive bonding, etc. to achieve the purpose of connecting multiple battery cells 10 in series or in parallel.

[0098] It can be understood that the bus bar 20 can connect two adjacent battery cells 10 arranged along the first direction X, or can also connect any two battery cells 10 spaced apart along the first direction X. Exemplarily, the bus bar 20 connects two adjacent battery cells 10 along the first direction X.

[0099] There can be various implementation structures of the limiting portion 13. For example, the limiting portion 13 can be a clamping member provided on the electrode lead-out assembly 12 to limit the relative position of the bus bar 20 and the electrode lead-out assembly 12 by a clamping method. The limiting portion 13 can also be an adhesive member provided on the electrode lead-out assembly 12 to limit the relative position of the bus bar 20 and the electrode lead-out assembly 12 by an adhesive method. Of course, the limiting portion 13 can also be a protrusion provided on the electrode lead-out assembly 12 to limit the relative position of the bus bar 20 and the electrode lead-out assembly 12 by controlling the setting position, setting shape, or setting quantity of the protrusion, etc. The specific implementation structure of the limiting portion 13 is not uniquely limited in this embodiment, as long as the relative position of the bus bar 20 and the electrode lead-out assembly 12 can be limited.

[0100] In the technical solution of this application, the electrode lead-out assembly 12 is provided with the limiting portion 13 to limit the bus bar 20, so that the relative position of the bus bar 20 and the electrode lead-out assembly 12 is limited, effectively simplifying the assembly process, and thus significantly improving the assembly efficiency of the battery 100. And, in some cases, the wire harness isolation plate for limiting the bus bar 20 in a traditional battery can also be cancelled, thus effectively simplifying the overall structure of the battery 100, which is beneficial to improving the energy density of the battery 100; in addition, when performing the connection operation between the bus bar 20 and the electrode lead-out assembly 12 on the battery 100 subsequently, it is not necessary to specifically set a positioning tooling to position the bus bar 20, which is beneficial to further simplifying the process and improving the assembly efficiency of the battery.

[0101] According to some embodiments of this application, please continue to refer to Figure 4 , the electrode lead-out assembly 12 includes a conductive member 121 and a first insulating member 122. The conductive member 121 is connected to the bus bar 20, and the first insulating member 122 insulates and isolates the conductive member 121 and the first wall 111; the limiting portion 13 is provided on the first insulating member 122 or the conductive member 121.

[0102] It can be understood that the conductive member 121 refers to a component with good electrical conductivity. There can be various implementation structures of the conductive member 121. For example, the conductive member 121 can be in the form of sheet-like or block-like structures of various conventional shapes, or the conductive member 121 can also be a special-shaped structure. The conductive member 121 can be made of materials with good electrical conductivity such as copper and aluminum.

[0103] The first insulating member 122 is made of a material with insulating properties, such as plastic or rubber. The first insulating member 122 is used to insulate and isolate the conductive member 121 from the first wall 111 of the housing 11, so that the conductive member 121 is insulated from the housing 11 and prevent a short circuit between the conductive member 121 and the housing 11.

[0104] There can also be various implementation structures of the first insulating member 122. The structure of the first insulating member 122 can be designed accordingly according to the structure of the conductive member 121. For example, both the first insulating member 122 and the conductive member 121 can be sheet-like structures, and the first insulating member 122 is disposed between the conductive member 121 and the first wall 111.

[0105] The limiting portion 13 can be disposed on the conductive member 121 or the first insulating member 122. When the limiting portion 13 is disposed on the conductive member 121, the limiting portion 13 can be made of the same material as the conductive member 121 and integrally formed. Of course, the limiting portion 13 can also be separately disposed and fixed to the conductive member 121 by welding or other connection means; similarly, when the limiting portion 13 is disposed on the first insulating member 122, the limiting portion 13 can be made of the same material as the first insulating member 122 and integrally formed. Of course, the limiting portion 13 can also be separately disposed and connected to the first insulating member 122. Exemplarily, as Figure 4 shown, the limiting portion 13 is disposed on the first insulating member 122.

[0106] The limiting portion disposed on the first insulating member 122 or the conductive member 121 can play a role in position-limiting the bus bar 20 connected to the conductive member 121.

[0107] According to some embodiments of the present application, please refer to Figures 4 to 7 and further refer to Figure 8 and Figure 9 , the battery cell 10 includes an electrode assembly 14. The electrode assembly 14 is accommodated in the housing 11. The electrode assembly 14 has a tab 141; the conductive member 121 includes a first portion 121a and a second portion 121b. The first portion 121a is parallel to the first wall 111, and the first portion 121a is electrically connected to the tab 141; the second portion 121b is connected to the bus bar 20, and the plane of the connection surface 40 between the second portion 121b and the bus bar 20 intersects the first wall 111.

[0108] The electrode assembly 14 is a component in the battery cell 10 where an electrochemical reaction occurs. The electrode assembly 14 is mainly formed by winding or laminating a positive electrode plate and a negative electrode plate, and usually, a separator is provided between the positive electrode plate and the negative electrode plate. The body of the electrode assembly 14 includes the portions of the positive electrode plate and the negative electrode plate having active materials and the separator. The portion of the positive electrode plate without active material forms the positive electrode tab, and the portion of the negative electrode plate without active material forms the negative electrode tab. The positive electrode tab and the negative electrode tab can be located at one end of the body together or at both ends of the body respectively.

[0109] It can be understood that the tab 141 in this embodiment can be a positive electrode tab or a negative electrode tab. During the charging and discharging process of the battery 100, the positive active material and the negative active material react with the electrolyte. The tab 141 is directly or indirectly connected to the first portion 121a of the conductive member 121 to form an electric current loop.

[0110] The connection surface 40 refers to the mutually connected surface between the second portion 121b and the bus bar 20. The plane where the connection surface 40 of the second portion 121b and the bus bar 20 is located intersects the first wall 111. For example, the angle α between the plane where the connection surface 40 of the second portion 121b and the bus bar 20 is located and the first wall 111 is 60 degrees - 120 degrees. Preferably, the angle α between the plane where the connection surface 40 of the second portion 121b and the bus bar 20 is located and the first wall 111 is 85 degrees - 95 degrees. Preferably, the angle α between the plane where the connection surface 40 of the second portion 121b and the bus bar 20 is located and the first wall 111 is 90 degrees.

[0111] Among them, there can be various implementation forms of the second portion 121b. For example, the second portion 121b can be a convex portion protruding from the first portion 121a and extending in a direction away from the first wall 111. This convex portion can be a structure of any conventional shape or a special-shaped structure. This convex portion includes a first connection surface 1211 for connecting to the bus bar 20, and this connection plane intersects the first wall 111.

[0112] The plane where the connection surface 40 of the second portion and the bus bar 20 is located intersects the first wall 111, so as to facilitate connecting the electrode lead-out assembly 12 to the tab 141 and connecting the electrode lead-out assembly 12 to the bus bar 20 in two different directions, facilitating the connection operation of the bus bar 20, thereby improving the assembly efficiency of the battery 100; and the tab 141 and the bus bar 20 are connected to two different portions of the conductive member 121, avoiding the mutual influence of the connection stability of the tab 141 and the bus bar 20 on the conductive member 121, and facilitating the maintenance of the battery 100.

[0113] According to some embodiments of the present application, please continue to refer to Figures 4 to 8, the second part 121b includes a first section 1212, a second section 1213, and a third section 1214. The first section 1212 extends from the first part 121a in a direction away from the first wall 111. The second section 1213 connects the first section 1212 and the third section 1214 at an end of the first section 1212 that is away from the first wall 111. The third section 1214 extends from the second section 1213 in a direction approaching the first wall 111. The current collector 20 is connected to a side of the third section 1214 that is away from the first section 1212.

[0114] In some embodiments, the shape of the second part 121b can be U-shaped, V-shaped, or other shapes.

[0115] "The second part is U-shaped" means that the first section 1212, the second section 1213, and the third section 1214 of the second part 121b enclose a structure similar to a U shape.

[0116] Among them, any one, two, or all of the first section 1212, the second section 1213, and the third section 1214 can be a flat plate-like structure, and the lengths, widths, and thicknesses of the first section 1212, the second section 1213, and the third section 1214 can be the same or different. Of course, any one, two, or all of the first section 1212, the second section 1213, and the third section 1214 can also be special-shaped structures such as arc-shaped, pleated, or wavy.

[0117] A first connection surface 1211 for connecting to the current collector 20 is provided on a side of the third section 1214 that is away from the first section 1212, and the first connection surface 1211 is connected to the current collector 20.

[0118] The second part 121b of the conductive member is U-shaped, and the current collector 20 is connected to a side of the third section 1214 that is away from the first section 1212. The conductive member 121 with this structure has a certain amount of movement allowance, which can effectively release the force brought by the later expansion of the battery cell 10 to the conductive member 121 or the current collector 20, playing a good role in buffering the expansion force. The first section 1212 extends from the first part 121a in a direction away from the first wall 111, expanding the space for the third section in the direction away from the first wall 111. The third section 1214 extends from the second section 1213 in a direction approaching the first wall 111, so that the third section 1214 has sufficient area and space in the direction away from the first wall 111 to connect to the current collector 20, facilitating the connection operation between the third section 1214 and the current collector 20, and at the same time ensuring the reliability of the connection between the third section 1214 and the current collector 20 and improving the current-carrying capacity at the connection.

[0119] According to some embodiments of the present application, please continue to refer to Figures 4 to 8, the first insulating member 122 includes a body 1221 and a protruding portion 1222. The body 1221 is disposed between the first wall 111 and the conductive member 121. The protruding portion 1222 protrudes from the body 1221 along the thickness direction of the first wall 111, and the protruding portion 1222 is inserted between the first section 1212 and the third section 1214.

[0120] The conductive member 121 includes a first portion 121a and a second portion 121b having a U-shaped structure. The body 1221 is disposed between the first wall 111 and the conductive member 121, that is, the body 1221 insulates and isolates the first portion 121a and the first wall 111, and isolates the second portion 121b and the first wall 111. Along the arrangement direction of the first section 1212, the second section 1213, and the third section 1214 (the second direction Y shown in the figure), the body 1221 can extend from the end of the first portion 121a to the end of the third section 1214, so as to completely insulate and isolate the conductive member 121 and the first wall 111.

[0121] There are various implementation structures of the protruding portion 1222. Exemplarily, as Figure 4 shown, in order to ensure the sufficiency of the first insulating member 122 to insulate and isolate the first wall 111 and the conductive member 121, along the width direction of the first section 1212 and the second section 1213 (the third direction Z shown in the figure), both ends of the protruding portion 1222 extend beyond both ends of the first section 1212 and the second section 1213.

[0122] Wherein, the height by which the protruding portion 1222 protrudes from the body 1221 along the thickness direction of the first wall 111 (i.e., the first direction X) can match the depth along the first direction X of the groove formed by enclosing the first section 1212, the second section 1213, and the third section 1214. Of course, the height by which the protruding portion 1222 protrudes from the body 1221 along the thickness direction of the first wall 111 (the first direction X) can also be less than the depth along the first direction X of the groove formed by enclosing the first section 1212, the second section 1213, and the third section 1214. Exemplarily, the height by which the protruding portion 1222 protrudes from the body 1221 along the thickness direction of the first wall 111 (i.e., the first direction X) can match the depth along the first direction X of the groove formed by enclosing the first section 1212, the second section 1213, and the third section 1214.

[0123] In still some other embodiments, please refer to Figure 4 , and further refer to Figure 6 , the protruding portion 1222 includes a first surface 1223 facing the third section 1214, and the first surface 1223 has a recessed area 1224, and the third section 1214 is received in the recessed area 1224.

[0124] Part of the body 1221 of the first insulating member 122 is disposed between the first wall 111 and the conductive member 121 to effectively insulate and isolate the conductive member 121 from the first wall 111. Meanwhile, the protruding portion 1222 of the first insulating member 122 is inserted between the first section 1212 and the second section 1213 of the conductive member 121. The protruding portion 1222 supports the second section 1213 of the conductive member 121 having a U-shaped structure, effectively strengthening the structural strength of the second section 1213 of the conductive member 121. Meanwhile, the protruding portion 1222 can effectively bear the pressing force of the bus bar 20 connected to the third section 1214, thereby effectively ensuring the force stability of the conductive member 121.

[0125] According to some embodiments of the present application, the limiting portion 13 is disposed on the protruding portion 1222 and / or the body 1221.

[0126] That is to say, the limiting portion 13 is disposed on the first insulating member 122 and may be located on the protruding portion 1222 or the body 1221 of the first insulating member 122.

[0127] Specifically, the limiting portion 13 may be disposed on the body 1221. Since the body 1221 insulates and isolates the first wall 111 from the conductive member 121, and the third section 1214 of the conductive member 121 is connected to the bus bar 20 on the side far from the first section 1212, in order to improve the convenience of the limiting portion 13 for limiting the bus bar 20, the limiting portion 13 may be disposed at the end of the body 1221 facing away from the first section 1212.

[0128] In some other embodiments, the limiting portion 13 may be disposed on the protruding portion 1222. Similarly, since the third section 1214 of the conductive member 121 is connected to the bus bar 20 on the side far from the first section 1212, in order to improve the convenience of the limiting portion 13 for limiting the bus bar 20, the protruding portion 1222 includes a first surface 1223 facing the third section 1214, and the limiting portion 13 may be disposed on the first surface 1223.

[0129] And, based on the implementation form that "the first surface 1223 has a recessed area 1224 and the third section 1214 is received in the recessed area 1224", the limiting portion 13 may also be disposed in the recessed area 1224.

[0130] Of course, the limiting portion 13 may also include a first limiting portion and a second limiting portion. The first limiting portion is disposed on the protruding portion 1222, and the second limiting portion is disposed on the body 1221.

[0131] The limiting portion is arranged on the first insulating member 122 and is located on the protrusion 1222 and / or the main body 1221 of the first insulating member 122. Compared with the structure in which the limiting portion 13 is arranged on the conductive member 121, the limiting portion 13 can be effectively prevented from occupying and interfering with the connection surface between the busbar 20 and the conductive member 121, thereby effectively ensuring the operational convenience and connection stability of the connection between the busbar 20 and the conductive member 121.

[0132] According to some embodiments of this application, please continue to refer to Figure 8 , and further refer to Figure 9 The electrode lead-out assembly 12 also includes an electrode terminal 123 . The first wall 111 is provided with an electrode lead-out hole. The electrode terminal 123 is passed through the electrode lead-out hole. The conductive member 121 is provided on the outside of the first wall 111 . The first portion 121 a and the pole ear 141 are electrically connected through the electrode terminal 123 .

[0133] The electrode terminal 123 plays a role of overcurrent, and the electrode terminal 123 connects the first part 121a of the conductive member 121 located outside the shell 11 and the pole ear 141 contained in the shell 11, so as to lead the electric energy inside the battery cell 10 to the conductive member 121 outside the battery cell 10. It can be understood that the electrode terminal 123 is insulated from the first wall 111, that is, there is no electrical conduction between the electrode terminal 123 and the shell 11.

[0134] There are many ways to connect the first part 121a of the conductive member 121 and the electrode terminal 123, such as welding, riveting, etc. For example, the first part 121a of the conductive member 121 and the electrode terminal 123 are riveted, and the conductive member 121 can be called a riveted block.

[0135] Furthermore, the electrode terminal 123 and the electrode tab 141 may be directly welded or indirectly connected via an intermediate transition component.

[0136] For example, Figure 9 As shown, the battery cell 10 also includes a converter 15, which is disposed in the housing 11 and located between the pole lug 141 and the electrode terminal 123. The converter 15 includes a pole lug connecting portion and a terminal connecting portion. The pole lug connecting portion of the converter 15 is connected to the pole lug, and the terminal connecting portion of the converter 15 is connected to the electrode terminal 123. The pole lug 141 and the electrode terminal 123 are connected via the converter 15.

[0137] To avoid short - circuit between the adapter 15 and the first wall 111, the battery cell 10 may further include a second insulating member 124. The second insulating member 124 is disposed within the housing 11 and located between the adapter 15 and the first wall 111. The second insulating member 124 insulates and isolates the adapter 15 and the first wall 111. The second insulating member 124 can also be referred to as the lower plastic, and correspondingly, the first insulating member 122 can also be referred to as the upper plastic.

[0138] The electrode terminal 123 leads the electrical energy of the electrode assembly 14 out of the battery cell 10 to facilitate the electrical connection between the conductive member 121 and the tab 141 of the electrode assembly 14.

[0139] According to some embodiments of the present application, the limiting portion 13 is configured to guide the bus bar 20 to move along the second direction Y, and the second direction Y intersects with the first direction X and intersects with the connection surface 40.

[0140] As described above, the connection surface 40 refers to the surface where the second part 121b and the bus bar 20 are interconnected. The plane where the second part 121b and the connection surface 40 of the bus bar 20 are located intersects with the first wall 111. The second direction Y intersects with the first direction X and intersects with the connection surface 40.

[0141] Wherein, the angle between the second direction Y and the first direction X can be 60 degrees - 120 degrees. Preferably, the angle between the second direction Y and the first direction X can be 85 degrees - 95 degrees. More preferably, the angle between the second direction Y and the first direction X can be 90 degrees.

[0142] Correspondingly, the angle between the second direction Y and the connection surface 40 can be 60 degrees - 120 degrees. Preferably, the angle between the second direction Y and the connection surface 40 can be 85 degrees - 95 degrees. More preferably, the angle between the second direction Y and the connection surface 40 can be 90 degrees.

[0143] Exemplarily, the first direction X is parallel to the connection surface 40, the second direction Y is perpendicular to the first direction X, and the second direction Y is perpendicular to the connection surface 40.

[0144] The limiting portion 13 is configured to guide the bus bar 20 to move along the second direction Y. During the assembly process of the battery 100, the setting of the limiting portion 13 facilitates guiding the bus bar 20 to approach the conductive member 121 along the second direction Y and restricts the movement of the bus bar 20 in the plane perpendicular to the second direction Y, thereby effectively reducing the risk that the bus bar 20 disengages from the electrode lead - out assembly 12 under the influence of forces such as gravity after being limited by the limiting portion 13.

[0145] According to some embodiments of the present application, please refer to Figure 4 and Figure 7, the bus bar 20 is located on one side of the housing 11 in the second direction Y, where the second direction Y is horizontal at this time, and the plane perpendicular to the second direction Y is vertical at this time. The limiting part 13 can support the bus bar component 20 in the vertical direction, guide the bus bar 20 to approach the conductive part 121 along the second direction Y (horizontal direction), and limit the movement of the bus bar 20 in the plane perpendicular to the second direction Y (vertical direction), preventing the risk that the bus bar 20 is separated from the electrode lead-out assembly 12 due to the influence of forces such as gravity, which facilitates the connection operation between the bus bar 20 and the electrode lead-out assembly 12.

[0146] According to some embodiments of the present application, please refer back to Figure 4 and Figure 7 , and further refer to Figure 10 , Figure 10 is the front view of the cooperation between the limiting part and the limiting cooperation part in some embodiments of the present application. The bus bar 20 is provided with a limiting cooperation part 24, and the limiting cooperation part 24 cooperates with the limiting part 13.

[0147] Corresponding to the implementation structure of the limiting part 13, the implementation structure of the limiting cooperation part 24 can also be various. In some embodiments, the limiting part 13 and the limiting cooperation part 24 can be two structural members that can be mutually clamped. For example, the limiting part 13 can be an annular structure, and the limiting cooperation part 24 can be a columnar structure inserted into the middle hole of the annular limiting part 13. The mutual clamping of the annular structure and the columnar structure can play a role in limiting the bus bar 20.

[0148] In some other embodiments, the limiting part 13 can be a protrusion, and the limiting cooperation part 24 can be a recess for the protrusion to insert. Of course, the limiting cooperation part 24 can also be a protrusion, and the limiting part 13 can be a recess for the protrusion to insert. The limiting part 13 and the limiting cooperation part 24 are mutually sleeved to play a role in limiting the bus bar 20.

[0149] The bus bar is provided with a limiting cooperation part 24, and the limiting cooperation part 24 of the bus bar 20 cooperates with the limiting part 13 of the electrode lead-out assembly 12 to further improve the stability of the electrode lead-out assembly 12 in limiting the bus bar 20.

[0150] According to some embodiments of the present application, the limiting part 13 includes a protrusion, the limiting cooperation part 24 includes a recess, and / or the limiting part 13 includes a recess, and the limiting cooperation part 24 includes a protrusion.

[0151] Specifically, the limiting part 13 and the limiting cooperation part 24 can be a structure in which the protrusion and the recess are mutually sleeved, and the positions of the protrusion and the recess can be interchanged.

[0152] There can be various implementation structures of the protrusion and the recess. For example, please refer to Figure 10 , and further refer to Figure 11 ,Figure 11 The figure is a front view of the limiting part and the limiting cooperation part according to some other embodiments of the present application. The protrusion can be in the shape of a cylinder. Correspondingly, the recess can be a circular blind hole or a through hole, or the recess can also be a strip-shaped notch, a strip-shaped hole, a strip-shaped blind groove and other structures. Of course, the protrusion can also be in the shape of a special-shaped structure such as an elliptical cylinder, a conical block, a trapezoidal block, etc.

[0153] It can be understood that the number of the protrusions and the recesses can be one or more.

[0154] The limiting part 13 and the limiting cooperation part 24 adopt a structure in which the protrusion and the recess cooperate. On the one hand, the cooperation between the protrusion and the recess has good limiting performance and can ensure the limitation of the relative position of the bus bar 20. On the other hand, the cooperation and assembly of the protrusion and the recess are simple and easy to implement, which can further simplify the assembly of the bus bar 20 and improve the assembly efficiency of the battery 100.

[0155] According to some embodiments of the present application, the electrode lead-out assembly 12 is provided with a plurality of limiting parts 13, and the bus bar 20 is provided with a plurality of limiting cooperation parts 24, and the limiting cooperation parts 24 correspond to the limiting parts 13 one by one.

[0156] It can be understood that the plurality of limiting parts 13 can be arranged at intervals. At the same time, the plurality of limiting parts 13 can be arranged at linear intervals, or can be arranged at matrix intervals, or can be distributed at scattered points at different positions of the electrode lead-out assembly 12.

[0157] The electrode lead-out assembly and the bus bar 20 are provided with a plurality of corresponding limiting parts 13 and limiting cooperation parts 24, so as to form multi-point and multi-directional limiting for the bus bar 20 and further improve the limiting stability of the bus bar 20.

[0158] According to some embodiments of the present application, the plurality of limiting cooperation parts 24 are arranged at intervals along the third direction Z, and the third direction Z intersects with the first direction X.

[0159] The first direction X and the third direction Z can be perpendicular to each other or not perpendicular to each other. Among them, the angle between the first direction X and the third direction Z can be 60 degrees - 120 degrees. Preferably, the angle between the first direction X and the third direction Z can be 85 degrees - 95 degrees. Preferably, the angle between the first direction X and the third direction Z can be 90 degrees, that is, the third direction Z is perpendicular to the first direction X, and the plurality of limiting cooperation parts 24 are arranged at intervals along the third direction Z.

[0160] The plurality of limiting cooperation parts 24 are arranged at intervals along the third direction Z, so that the bus bar 20 forms multi-point limiting in the third direction Z.

[0161] According to some embodiments of the present application, the plurality of limiting cooperation parts 24 are distributed at both ends of the bus bar 20 along the third direction Z.

[0162] It is understandable that two limiting fitting portions 24 may be provided on the busbar 20, and the two limiting fitting portions 24 are distributed at both ends of the busbar 20 along the third direction Z. An odd number or an even number of limiting fitting portions 24 greater than two may also be provided on the busbar 20, and the plurality of limiting fitting portions 24 are distributed at both ends of the busbar 20 along the third direction Z in equal or unequal amounts.

[0163] For example, Figure 7 As shown, four limiting fitting parts 24 are provided on the same busbar 20, and the four limiting fitting parts 24 are equally distributed at both ends of the busbar 20 along the third direction Z, and the two limiting fitting parts 24 located at the same end of the busbar along the third direction Z are spaced apart along the first direction X.

[0164] A plurality of limit fitting portions 24 are distributed at both ends of the busbar 20 along the third direction Z, thereby more stably limiting the movement of the busbar 20 along the third direction Z. The structure in which a plurality of limit fitting portions 24 are distributed at both ends of the busbar 20 facilitates simplifying the structure of the busbar 20 and avoids the limit fitting portions 24 from occupying too much of the area of ​​the connection surface of the busbar 20 used for connection with the electrode lead-out assembly 12, thereby effectively ensuring the stability of the connection between the busbar 20 and the electrode lead-out assembly 12.

[0165] According to some embodiments of the present application, the busbar 20 includes a bottom wall 21, two side walls 22 and two flanged portions 23, the two side walls 22 are arranged opposite to each other along the first direction X, and the bottom wall 21 connects the two side walls 22. The two flanged portions 23 are arranged corresponding to the two side walls 22, each flanged portion 23 extends from one end of the corresponding side wall 22 away from the bottom wall 21 in a direction away from the other side wall 22, and the two flanged portions 23 are respectively connected to the electrode lead-out assemblies 12 of the two battery cells 10.

[0166] “The two flange portions 23 are respectively connected to the electrode lead-out assemblies 12 of the two battery cells 10 ” means that the sides of the two flange portions 23 facing away from the bottom wall 21 are connected to the electrode lead-out assemblies 12 .

[0167] In some other embodiments, each flange portion 23 may also extend toward the other side wall 22 .

[0168] The busbar 20 has an "I"-shaped structure, which effectively improves the structural strength of the busbar 20 itself. At the same time, the two flange portions 23 of the busbar 20 are connected to the electrode lead-out assemblies 12 of the two battery cells 10. The side walls 22 and the bottom wall 21 of the "I"-shaped busbar 20 form a step surface, so that the busbar 20 has a certain amount of margin of activity, which can effectively release the force brought to the busbar 20 by the later expansion of the battery cell 10, and play a good role in buffering the expansion force.

[0169] According to some embodiments of the present application, the limiting and mating portion 24 is provided on the flanging portion 23.

[0170] Specifically, when the limiting and mating portion 24 is provided on the flanging portion 23, the limiting portion 13 acts on the flanging portion 23 to limit the bus bar member 20.

[0171] Based on the implementation form that "the electrode lead-out assembly 12 is provided with a plurality of limiting portions 13, the bus bar member 20 is provided with a plurality of limiting and mating portions 24, and the limiting and mating portions 24 correspond to the limiting portions 13 one by one", a plurality of limiting and mating portions 24 can be provided on each flanging portion 23.

[0172] Exemplarily, please refer again to Figure 10 and Figure 11 , two limiting and mating portions 24 are provided on each flanging portion 23, and the two limiting and mating portions 24 are distributed at both ends of the flanging portion 23 in the third direction Z. Among them, the thickness direction of the bottom wall 21 extends along the second direction Y, and the first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs.

[0173] The limiting portion 13 directly acts on the flanging portion 23 of the bus bar member 20 to limit the portion of the bus bar member 20 connected to the electrode lead-out assembly 12, thereby effectively ensuring the limiting accuracy and connection accuracy of the bus bar member 20.

[0174] According to some embodiments of the present application, along the second direction Y, the distance from the flanging portion 23 to the bottom wall 21 is D1, satisfying 2 mm ≤ D1 ≤ 10 mm. Preferably, 4 mm ≤ D1 ≤ 6 mm; the second direction Y is perpendicular to the bottom wall 21.

[0175] Specifically, please refer to Figure 9 , the plane where the bottom wall 21 is located is parallel to the first direction X, the second direction Y is perpendicular to the first direction X, the bottom wall 21 has a second surface 211 facing the battery cell 10, the flanging portion 23 has a second connection surface 231 facing the battery cell 10, and the distance of the bottom wall 21 along the second direction Y is the distance between the second surface 211 and the second connection surface 231.

[0176] It can be understood that the distance D1 from the flanging portion 23 to the bottom wall 21 can be 2 mm, can be 10 mm, or can be any value greater than 2 mm and less than 10 mm.

[0177] Furthermore, the distance D1 from the flanging portion 23 to the bottom wall 21 can be 4 mm, can be 6 mm, or can be any value greater than 4 mm and less than 6 mm. Exemplarily, the distance D1 from the flanging portion 23 to the bottom wall 21 is 5 mm.

[0178] If the distance from the flanging part to the bottom wall 21 is too large, the distance between the bottom wall 21 of the current collector 20 and the battery cell 10 is relatively large, and the current collector 20 will occupy a large amount of space outside the battery cell 10; if the distance from the flanging part 23 to the bottom wall 21 is too small, the margin for the current collector 20 to deform under force is too small, which is not conducive to effectively exerting the buffering and expansion force of the current collector 20; by controlling the distance from the flanging part 23 to the bottom wall 21 between 2 mm and 10 mm, while ensuring that the current collector 20 has a good buffering and expansion force, the current collector 20 can be prevented from occupying a large amount of space of the battery 100.

[0179] According to some embodiments of the present application, the current collector 20 and the electrode lead-out assembly 12 are connected to form a connection area, and the dimension D2 of the connection area in the first direction X is 3 mm ≤ D2 ≤ 10 mm, preferably, 4 mm ≤ D2 ≤ 6 mm.

[0180] Specifically, please continue to refer to Figure 9 , the current collector 20 includes a first connection surface 1211 for connecting with the electrode lead-out assembly 12, the electrode lead-out assembly 12 includes a second connection surface 231 for connecting with the current collector 20, and after the current collector 20 and the electrode lead-out assembly 12 are connected, the area where the first connection surface 1211 and the second connection surface 231 are connected to each other forms the above-mentioned connection area.

[0181] The dimension D2 of the connection area in the first direction X (the stacking direction of multiple battery cells 10) can be 3 mm, can be 10 mm, or can be any value greater than 3 mm and less than 10 mm.

[0182] Furthermore, the dimension D2 of the connection area in the first direction X (the stacking direction of multiple battery cells 10) can be 4 mm, can be 6 mm, or can be any value greater than 4 mm and less than 6 mm. Exemplarily, D2 is 4.5 mm.

[0183] If D2 is too large, the area of the connection surface that needs to be reserved for the current collector 20 and the electrode lead-out part is too large. Correspondingly, the current collector 20 and the electrode lead-out assembly 12 will occupy a large amount of space outside the battery cell 10, which is not conducive to improving the space utilization rate of the battery 100; if D2 is too small, the width of the connection area is too small, and the connection strength and connection stability between the current collector 20 and the electrode lead-out assembly 12 cannot be guaranteed; the technical solution of the present application limits the width of the connection area between the current collector 20 and the electrode lead-out assembly 12 to between 3 mm and 10 mm, which can effectively ensure the connection strength and connection stability between the current collector 20 and the electrode lead-out assembly 12 while avoiding excessive occupation of the space of the battery 100.

[0184] According to some embodiments of the present application, the first direction X is parallel to the thickness direction of the first wall 111.

[0185] Specifically, a plurality of battery cells 10 are stacked along the first direction X. The thickness direction of the first wall 111 extends along the first direction X. Then, the first wall 111 is located on one side of the battery cell 10 along the first direction X, and the first direction X is perpendicular to the plane where the first wall 111 is located.

[0186] Correspondingly, the electrode lead-out assembly 12 is disposed on the first wall 111, that is, the electrode lead-out assembly 12 is located on one side of the battery cell 10 along the first direction X.

[0187] For the battery composed of the battery cells 10 having this structure, the occupation of the top space of the battery cells 10 by the bus bar 20 and the electrode lead-out assembly 12 can be effectively reduced, thereby effectively improving the space utilization rate of the battery 100, and further improving the energy density of the battery 100.

[0188] According to some embodiments of the present application, the first wall 111 is the wall with the largest area among all the walls of the outer shell 11.

[0189] Specifically, the electrode lead-out assembly 12 is disposed on the large surface of the battery cell 10, and the large surface of the battery cell 10 is perpendicular to the stacking direction (the first direction X) of the battery cells 10.

[0190] Exemplarily, as Figure 3 shown, the battery cell 10 may have a flat blade-like structure. The thickness of the battery cell 10 extends along the first direction X, and the thickness of the battery cell 10 is less than the length of the battery cell 10 and less than the width of the battery cell 10.

[0191] Since the thickness of the battery cell 10 is reduced, when the electrode lead-out assembly 12 is disposed at the end of the battery cell 10, the size of the electrode lead-out assembly 12 will be limited. If the size of the electrode lead-out assembly 12 is too small, the over-current requirement of the battery cell 10 cannot be met.

[0192] By disposing the electrode lead-out assembly 12 on the large surface of the battery cell 10 and on one side of the battery cell 10 along its stacking arrangement direction, compared with the conventional structure in which the electrode lead-out assembly 12 is disposed on the narrow surface of the battery cell 10, the technical solution of the present application can effectively ensure the stability of the size structure of the electrode lead-out assembly 12, so as to ensure that the electrode lead-out assembly 12 can meet the over-current requirement of the battery cell 10.

[0193] According to some embodiments of the present application, the outer shell 11 further includes a second wall 113 opposite to the first wall 111. A first region at the edge of the second wall 113 is recessed to form a recess 1131, and the recess 1131 is used to accommodate at least a part of the electrode lead-out assembly 12 of the battery cell 10 adjacent to the second wall 113.

[0194] Specifically, please refer to Figure 8, the first wall 111 and the second wall 113 are spaced apart along the first direction X. After a plurality of battery cells 10 are stacked along the first direction X, the first wall 111 of a single battery cell 10 is adjacent to the second wall 113 of an adjacent battery cell 10.

[0195] The second wall 113 includes a first region located at the edge of the second wall 113 facing the bus bar 20. "The first region is recessed to form a recess 1131" means that the first region is recessed along the first direction X towards the first wall 111 to form the recess 1131.

[0196] The recess 1131 on the second wall 113 is used to accommodate at least a part of the electrode lead-out assembly 12 provided on the first wall 111 adjacent to the second wall 113.

[0197] Since the recess 1131 is provided at the edge of the second wall 113 of each battery cell 10, and the electrode lead-out assembly 12 of each battery cell 10 is provided on the first wall 111 opposite to the second wall 113, when a plurality of battery cells 10 are arranged along the first direction, the recess 1131 of the first battery cell among two adjacent battery cells can accommodate at least a part of the electrode lead-out assembly 12 of the second battery cell. This structure is beneficial to further reducing the space occupancy rate of the electrode lead-out assembly 12, thereby further improving the structural compactness of the battery 100 and being beneficial to increasing the energy density of the battery 100. At the same time, the recess 1131 plays a certain protective role for the electrode lead-out assembly 12 and the connection area where the electrode lead-out assembly 12 is connected to the bus bar 20, reducing the risk of the electrode lead-out assembly 12 being subjected to uncontrollable external forces, thereby effectively improving the structural stability of the electrode lead-out assembly 12 and the connection stability between the electrode lead-out assembly 12 and the bus bar 20.

[0198] According to some embodiments of the present application, the housing 11 includes a housing body 112 and an end cap. The housing body 112 has an opening, and the end cap closes the opening. The first wall 111 is the end cap.

[0199] The end cap refers to a component that covers the opening of the housing body 112 to isolate the internal environment of the battery cell 10 from the external environment. Without limitation, the shape of the end cap can be adapted to the shape of the housing body 112 to cooperate with the housing body 112. In some embodiments, the end cap can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap is not easily deformed when being squeezed and collided, enabling the battery cell 10 to have higher structural strength. The material of the end cap can also be various, for example, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. The embodiments of the present application do not make special restrictions on this.

[0200] The shell 112 is a component used to cooperate with the end cover to form the internal environment of the battery cell 10. The shell 112 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0201] The first wall 111 is an end cover, and the electrode lead-out assembly 12 is disposed on the end cover of the housing 11 , which is beneficial to improving the assembly convenience of the electrode lead-out assembly 12 installed on the first wall 111 .

[0202] Some embodiments of the present application provide an electrical device, including a battery 100 according to any of the above solutions, and the battery 100 is used to provide electrical energy.

[0203] The power-consuming device may be any of the aforementioned devices or systems using the battery 100 .

[0204] Please refer to Figures 2 to 9 The embodiment of the present application provides a battery 100, which includes a plurality of battery cells 10 and a busbar 20, and the plurality of battery cells 10 are stacked along a first direction X.

[0205] Each battery cell 10 includes a housing 11, an electrode lead assembly 12, an electrode assembly 14, a transition piece 15, and a second insulating piece 124. The housing 11 includes a shell 112 and an end cover. The shell 112 has an opening, and the end cover closes the opening. The first wall 111 is the end cover. In addition, the first direction X is parallel to the thickness direction of the first wall 111, and the first wall 111 is the wall with the largest area among all the walls of the housing 11.

[0206] The electrode assembly 14 , the adapter 15 and the second insulating member 124 are accommodated in the housing 11 , and the electrode assembly 14 has a tab 141 .

[0207] The electrode lead-out assembly 12 is disposed on the first wall 111 of the housing 11, and the electrode lead-out assembly 12 includes a conductive member 121, a first insulating member 122, and an electrode terminal 123. The first wall 111 is provided with an electrode lead-out hole, the electrode terminal 123 is passed through the electrode lead-out hole, the adapter 15 is disposed between the tab 141 and the electrode terminal 123, and the tab 141 and the electrode terminal 123 are connected through the adapter 15, wherein the second insulating member is disposed between the adapter 15 and the first wall 111.

[0208] The conductive member 121 is disposed on the outer side of the first wall 111. The conductive member 121 includes a first portion 121a and a second portion 121b. The first portion 121a is parallel to the first wall 111. The first portion 121a is riveted to the electrode terminal 123. The second portion 121b is U-shaped and includes a first segment 1212, a second segment 1213, and a third segment 1214. The first segment 1212 extends from the first portion 121a in a direction away from the first wall 111. The second segment 1213 connects the first segment 1212 and the third segment 1214 at an end of the first segment 1212 away from the first wall 111. The third segment 1214 extends from the second segment 1213 in a direction approaching the first wall 111. A first connection surface 1211 for connecting to the bus bar 20 is provided on a side of the third segment 1214 facing away from the first segment 1212.

[0209] The first insulating member 122 insulates and isolates the conductive member 121 and the first wall 111. The first insulating member 122 includes a body 1221 and a protruding portion 1222. The body 1221 is disposed between the first wall 111 and the conductive member 121. The protruding portion 1222 protrudes from the body 1221 along the first direction X. The protruding portion 1222 is inserted between the first segment 1212 and the third segment 1214.

[0210] The bus bar 20 connects the electrode lead-out assemblies 12 of two adjacent battery cells 10. The bus bar 20 includes a bottom wall 21, two side walls 22, and two flanging portions 23. The two side walls 22 are oppositely disposed along the first direction X. The bottom wall 21 connects the two side walls 22. The two flanging portions 23 are correspondingly disposed with the two side walls 22. Each flanging portion 23 extends from an end of the corresponding side wall 22 away from the bottom wall 21 in a direction away from the other side wall 22. One of the flanging portions 23 of the bus bar 20 is connected to the first connection surface 1211 of the conductive member of the first battery cell among two adjacent battery cells 10. The other flanging portion 23 of the bus bar 20 is connected to the first connection surface 1211 of the conductive member of the second battery cell among two adjacent battery cells 10. The connection surface 40 after the flanging portion 23 is connected to the first connection surface 1211 is perpendicular to the first wall 111.

[0211] Wherein, the electrode lead-out assembly 12 is provided with a limiting portion 13, and the flanging portion 23 is provided with a limiting and cooperating portion 24. The limiting portion 13 cooperates with the limiting and cooperating portion 24 to limit the bus bar 20.

[0212] Specifically, the protruding portion 1222 includes a first surface 1223 adjacent to the third segment 1214. The limiting portion 13 is a protrusion and protrudes from the first surface 1223 along the second direction Y. The limiting portion 13 includes two protrusions. The two protrusions are spaced apart along the third direction Z on the first surface 1223. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs.

[0213] Correspondingly, a limit fitting portion 24 is provided at each of the two ends of the flanging portion 23 along the third direction Z. The limit fitting portion 24 is a concave portion that penetrates the flanging portion 23 along the second direction Y. The concave portions correspond to the protrusions one by one, and the limiting portion 13 can guide the busbar member 20 to move along the second direction Y.

[0214] It should be noted that, without conflict, the features in the embodiments of the present application can be combined with each other.

[0215] Although the present application has been described with reference to the preferred embodiments, various improvements can be made to it and its components can be replaced with equivalents without departing from the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that, Comprising: A plurality of battery cells, the plurality of battery cells being stacked in a first direction. The battery cell includes a housing and an electrode lead-out assembly, the electrode lead-out assembly being disposed on a first wall of the housing, and the electrode lead-out assembly being configured to lead out the electrical energy of the battery cell. The first direction is parallel to the thickness direction of the first wall; A bus bar, the bus bar connecting the electrode lead-out assemblies of two of the battery cells; Wherein, the electrode lead-out assembly is provided with a limiting portion, and the limiting portion is configured to limit the bus bar.

2. The battery according to claim 1, wherein The electrode lead-out assembly includes a conductive member and a first insulating member, the conductive member being connected to the bus bar, and the first insulating member insulating and isolating the conductive member and the first wall; The limiting portion is disposed on the first insulating member or the conductive member.

3. The battery according to claim 2, wherein The battery cell includes an electrode assembly, the electrode assembly being received in the housing, and the electrode assembly having a tab; The conductive member includes a first portion and a second portion, the first portion being parallel to the first wall, and the first portion being electrically connected to the tab; the second portion is connected to the bus bar, and the plane of the connection surface of the second portion and the bus bar intersects the first wall.

4. The battery according to claim 3, wherein, The second portion includes a first segment, a second segment, and a third segment. The first segment extends from the first portion in a direction away from the first wall. The second segment connects the first segment and the third segment at an end of the first segment away from the first wall. The third segment extends from the second segment in a direction approaching the first wall, and the bus bar is connected to a side of the third segment away from the first segment.

5. The battery according to claim 4, characterized in that, The first insulating member includes a body and a protruding portion. The body is disposed between the first wall and the conductive member, and the protruding portion protrudes from the body in the thickness direction of the first wall. The protruding portion is inserted between the first segment and the third segment.

6. The battery according to claim 5, characterized in that, The limiting portion is disposed on the protruding portion and / or the body.

7. The battery according to any one of claims 3-6, characterized in that, The electrode lead-out assembly further includes: An electrode terminal, an electrode lead-out hole is provided on the first wall, the electrode terminal passes through the electrode lead-out hole, the conductive member is disposed outside the first wall, and the first portion and the tab are electrically connected through the electrode terminal.

8. The battery according to any one of claims 3-6, characterized in that, The limiting portion is configured to guide the bus bar to move in a second direction, the second direction intersecting the first direction and intersecting the connection surface.

9. The battery according to any one of claims 1-6, characterized in that, The bus bar is provided with a limiting and mating portion, and the limiting and mating portion mates with the limiting portion.

10. The battery according to claim 9, characterized in that, The limiting portion includes a protrusion, and the limiting and mating portion includes a recess, and / or The limiting portion includes a recess, and the limiting and mating portion includes a protrusion.

11. The battery according to claim 9, characterized in that, The electrode lead-out assembly is provided with a plurality of the limiting portions, the bus bar is provided with a plurality of the limiting and mating portions, and the limiting and mating portions correspond to the limiting portions one by one.

12. The battery according to claim 11, characterized in that, A plurality of the limiting and mating portions are spaced apart in a third direction, the third direction intersecting the first direction.

13. The battery according to claim 12, wherein, A plurality of the limiting and mating portions are distributed at two ends of the bus bar along the third direction.

14. The battery according to claim 9, characterized in that, The bus bar includes: A bottom wall; Two side walls, the two side walls being disposed opposite to each other in the first direction, and the bottom wall connecting the two side walls; Two flanging parts, the two flanging parts are arranged corresponding to the two side walls, each flanging part extends from the end of the corresponding side wall away from the bottom wall in a direction away from the other side wall, and the two flanging parts are respectively connected to the electrode lead-out assemblies of the two battery cells.

15. The battery according to claim 14, wherein, The limiting and cooperating part is arranged on the flanging part.

16. The battery according to claim 15, characterized in that, In the second direction, the distance from the flanging part to the bottom wall is D1, satisfying 2mm ≤ D1 ≤ 10mm; the second direction is perpendicular to the bottom wall.

17. The battery according to claim 16, characterized in that, 4mm ≤ D1 ≤ 6mm.

18. The battery according to claim 16, wherein, The bus bar is connected to the electrode lead-out assembly to form a connection area, and the dimension of the connection area in the first direction is D2, satisfying 3mm ≤ D2 ≤ 10mm.

19. The battery according to claim 18, wherein 4mm ≤ D2 ≤ 6mm.

20. The battery according to any one of claims 1-6, characterized in that, The first wall is the wall with the largest area among all the walls of the outer shell.

21. The battery according to any one of claims 1-6, characterized in that, The outer shell further includes a second wall arranged opposite to the first wall, and a recessed part is formed by the inward depression of the first area at the edge of the second wall, and the recessed part is used to accommodate at least a part of the electrode lead-out assembly of the battery cell adjacent to the second wall.

22. The battery according to any one of claims 1-6, characterized in that, The outer shell includes a housing and an end cap, the housing has an opening, the end cap closes the opening, and the first wall is the end cap.

23. An electrical device, characterized in that, Including the battery according to any one of claims 1-22, the battery is used to provide electric energy.

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