Battery and electric device

Abstract

The utility model provides a battery and a power utilization device, and belongs to the technical field of batteries. The battery comprises a bus member and a plurality of battery cells. The plurality of single batteries are stacked along a first direction, each single battery is provided with an electrode leading-out part, and the electrode leading-out parts are arranged on first surfaces of the single batteries in the first direction and are used for outputting or inputting electric energy of the single batteries; and the confluence piece is connected with the electrode lead-out parts of the two adjacent battery monomers. Wherein the electrode leading-out part is provided with an end face opposite to the first surface in the first direction and a side face surrounding the end face, and the bus piece is connected with the side face. According to the invention, the bus piece is connected with the side surface of the electrode lead-out part, so that the connection direction of the bus piece and the electrode lead-out part is vertical to the first direction, and the bus piece and the electrode lead-out part are not influenced by interference of two adjacent battery monomers when being connected with each other; therefore, the connection difficulty between the bus member and the electrode lead-out part is reduced, and the operation is convenient.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, power batteries play an irreplaceable and important role as the power source of electric vehicles. A battery consists of a housing and multiple battery cells housed within the housing. When assembling multiple battery cells into the housing, the multiple battery cells need to be connected in series, in parallel, or in a mixed manner before being assembled into a whole within the housing to complete the production and assembly of the battery. However, in the prior art, the assembly of multiple battery cells during battery production is difficult, resulting in high battery assembly difficulty and hindering battery production efficiency. Utility Model Content

[0003] The embodiments of the present application provide a battery and an electrical device that can effectively improve the production efficiency of the battery.

[0004] In a first aspect, an embodiment of the present application provides a battery comprising a busbar and a plurality of battery cells; the plurality of battery cells are stacked along a first direction, the battery cells having an electrode lead-out portion, the electrode lead-out portion being arranged on a first surface of the battery cell in the first direction, the electrode lead-out portion being used to output or input electrical energy of the battery cell; the busbar connects the electrode lead-out portions of two adjacent battery cells; wherein the electrode lead-out portion has an end face arranged opposite to the first surface along the first direction and a side face arranged around the end face, and the busbar is connected to the side face.

[0005] In the above technical solution, a battery comprises a plurality of battery cells stacked along a first direction, each of the battery cells having a first surface on one side in the first direction, and an electrode lead portion of the battery cell being disposed on the first surface. A busbar is connected to the electrode lead portions of two adjacent battery cells to achieve series connection between the two battery cells. The electrode lead portions have side surfaces surrounding the end surfaces, i.e., the side surfaces are perpendicular to the first surface. By connecting the busbar to the side surfaces of the electrode lead portions, on the one hand, the busbar can alleviate the phenomenon of the busbar occupying the space between the plurality of battery cells stacked in the first direction, thereby saving the space occupied in the first direction after the plurality of battery cells and the busbar are assembled. On the other hand, the direction of connection between the busbar and the electrode lead portions is perpendicular to the first direction, so that the busbar and the electrode lead portions are not affected by interference from the two adjacent battery cells when connected to each other, thereby reducing the difficulty of connecting the busbar and the electrode lead portions, facilitating operation, and thereby effectively reducing the difficulty of battery assembly, thereby improving battery production efficiency.

[0006] In some embodiments, the battery cell is a rectangular parallelepiped structure, and the first direction, the length direction of the battery cell, and the width direction of the battery cell are perpendicular to each other; wherein the busbar bypasses one side of the battery cell in the width direction of the battery cell.

[0007] In the above technical solution, the busbar is arranged to bypass one side of the battery cell in the width direction of the battery cell and then connected to the side surfaces of the two electrode lead-out portions, that is, the busbar bypasses the longer side surface of the battery cell. This structure can effectively save the space occupied by the battery cell and the busbar in the length direction of the battery cell after they are assembled with each other, and it is convenient to assemble the whole formed by connecting multiple battery cells and the busbar into the battery box, which is conducive to reducing the difficulty of battery assembly.

[0008] In some embodiments, the busbar includes a busbar and two connecting parts; along the width direction of the battery cell, the busbar is located on one side of the battery cell; along the first direction, the two connecting parts are respectively located on both sides of the battery cell and connected to the two ends of the busbar, and the two connecting parts are respectively connected to the side surfaces of the two electrode lead-out parts.

[0009] In the above technical solution, the busbar is provided with a busbar portion and two connecting portions. The busbar portion is provided on one side of the battery cell in the width direction of the battery cell. The two connecting portions are respectively located on both sides of the battery cell in the first direction, and each connecting portion is used to connect the side of the busbar portion and an electrode lead-out portion to enable the busbar to bypass one side of the battery cell in the width direction of the battery cell. This structure is simple and easy to manufacture and assemble.

[0010] In some embodiments, the side surface includes a first side surface, the first side surface is perpendicular to a length direction of the battery cell, and the connecting portion is connected to the first side surface.

[0011] In the above technical solution, the side surface includes a first side surface perpendicular to the length direction of the battery cell, and the connecting portion is connected to the first side surface, that is, the connecting portion is connected to one side of the electrode lead-out portion in the length direction of the battery cell. This structure enables the connection direction of the connecting portion and the first side surface to be the length direction of the battery cell, thereby effectively avoiding the busbar located on one side of the battery cell in the width direction of the battery cell, which is conducive to further reducing the difficulty of connection between the busbar and the electrode lead-out portion.

[0012] In some embodiments, along the length direction of the battery cell, the battery cell has a first edge located at one end of the battery cell, the electrode lead portion is arranged in an area of ​​the first surface close to the first edge, and the surface of the electrode lead portion facing the first edge is the first side surface.

[0013] In the above technical solution, the electrode lead-out portion is arranged in an area of ​​the first surface close to the first edge of the battery cell, and the surface of the electrode lead-out portion facing the first edge in the length direction of the battery cell is the first side surface, so that the first side surface where the electrode lead-out portion is connected to the connecting portion of the busbar is closer to the first edge of the battery cell, thereby reducing the interference effect caused by the mutual connection between the connecting portion and the first side surface.

[0014] In some embodiments, along the length direction of the battery cell, at least a portion of the connecting portion is located between the first side surface and the first edge.

[0015] In the above technical solution, by locating at least a portion of the connecting portion between the first side surface and the first edge in the length direction of the battery cell, that is, at least a portion of the connecting portion is accommodated between the first side surface and the first edge, the phenomenon that the connecting portion occupies too much space of the battery cell in the length direction of the battery cell can be reduced.

[0016] In some embodiments, along the direction from the first side surface to the first edge, the connecting portion does not extend beyond the first edge.

[0017] In the above technical solution, by setting the connecting portion so as not to exceed the first edge in the length direction of the battery cell, that is, the connecting portion is located as a whole between the first side surface and the first edge, the space occupied by the battery cell and the busbar in the length direction of the battery cell after being assembled with each other is saved, which is beneficial to improving the energy density of the battery.

[0018] In some embodiments, the side surface includes a second side surface, the second side surface is perpendicular to a width direction of the battery cell, and the connecting portion is connected to the second side surface.

[0019] In the above technical solution, the side surface includes a second side surface perpendicular to the width direction of the battery cell, and the connecting portion is connected to the second side surface, that is, the connecting portion is connected to one side of the electrode lead-out portion in the width direction of the battery cell. Since the busbar portion of the busbar is located on one side of the battery cell in the width direction of the battery cell, this structure can, on the one hand, shorten the length of the connecting portion connected between the second side surface and the busbar portion, thereby saving materials of the busbar and reducing production costs.

[0020] In some embodiments, the connecting portion includes a first connecting segment and a flange segment connected to each other; the first connecting segment extends along the width direction of the battery cell and is connected to the busbar; along the first direction, the flange segment extends from the first connecting segment in a direction away from the first surface and is connected to the second side surface.

[0021] In the above technical solution, the connecting portion of the busbar is arranged into a first connecting section and a flange section that are connected to each other and perpendicular to each other, so that the connecting portion has a first connecting section connected to the busbar of the busbar and a flange section that is parallel to the second side surface, so that the electrical connection between the electrode lead portion and the busbar can be achieved by connecting the flange section to the second side surface. On the one hand, this structure can increase the connection area between the connecting portion and the second side surface to improve the flow area, and on the other hand, the area where the flange section and the second side surface are connected to each other will not be blocked or interfered with by the first connecting section, which is beneficial to reducing the difficulty of connection between the connecting portion and the second side surface.

[0022] In some embodiments, the side surface includes a first side surface, a chamfered surface, and a second side surface. The first side surface is perpendicular to the length direction of the battery cell, the second side surface is perpendicular to the width direction of the battery cell, the chamfered surface connects the first side surface and the second side surface, and the connecting portion is connected to the chamfered surface.

[0023] In the above technical solution, the side surface includes a first side surface, a chamfered surface and a second side surface connected in sequence, and the first side surface and the second side surface are respectively perpendicular to the length direction of the battery cell and the width direction of the battery cell. That is to say, the connecting portion is connected to the chamfered surface that intersects with the length direction of the battery cell and the width direction of the battery cell. On the one hand, this structure enables the connection direction of the connecting portion and the chamfered surface to effectively avoid the busbar located on one side of the battery cell in the width direction of the battery cell, which is beneficial to further reduce the difficulty of connecting the busbar and the electrode lead-out portion. On the other hand, it can shorten the length of the connecting portion connected between the chamfered surface and the busbar, which is beneficial to saving the material cost of the busbar.

[0024] In some embodiments, the connecting portion includes a second connecting segment and a third connecting segment connected to each other; the second connecting segment extends along the width direction of the battery cell and is connected to the busbar; the third connecting segment is bent relative to the second connecting segment and connected to the chamfered surface.

[0025] In the above technical solution, by setting the connecting portion of the busbar as a second connecting segment and a third connecting segment that are connected to each other, the second connecting segment extends along the width direction of the battery cell, and the third connecting segment is bent relative to the second connecting segment, so that the third connecting segment can be parallel to the chamfered surface, so that the third connecting segment can be connected to the chamfered surface.

[0026] In some embodiments, along the length direction of the battery cell, the current bus does not extend beyond both ends of the battery cell.

[0027] In the above technical solution, by setting the busbar so as not to exceed the two ends of the battery cell in the length direction of the battery cell, the busbar is located between the two ends of the battery cell in the length direction of the battery cell, thereby effectively saving the space occupied by the battery cell and the busbar in the length direction of the battery cell after they are assembled with each other, thereby improving the overall energy density of the battery.

[0028] In some embodiments, along the first direction, the battery cell has a second surface arranged opposite to the first surface; the second surface is recessed to form a groove, the groove is used to accommodate the electrode lead-out portion of the battery cell adjacent to the second surface, the groove passes through one end of the battery cell along the length direction of the battery cell, and the groove passes through both ends of the battery cell along the width direction of the battery cell.

[0029] In the above technical solution, by providing a groove for accommodating the electrode lead portion of an adjacent battery cell on a second surface of the battery cell that is arranged opposite the first surface along the first direction, the stacking of multiple battery cells along the first direction can effectively save the space occupied by the multiple battery cells stacked in the first direction. In addition, by extending the groove through one end of the battery cell along the length direction and through both ends of the battery cell along the width direction, a clearance space is provided when the busbar is connected to the electrode lead portion, thereby facilitating the interconnection between the busbar and the side surfaces of the electrode lead portion, thereby facilitating the connection between the busbar and the electrode lead portion.

[0030] In a second aspect, an embodiment of the present application further provides an electrical device comprising the above-mentioned battery, which is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0033] Figure 2 An exploded view of the structure of a battery provided in some embodiments of the present application;

[0034] Figure 3 A schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0035] Figure 4 A schematic structural diagram of a battery cell provided in some embodiments of the present application;

[0036] Figure 5 for Figure 4 A partial enlarged view of the battery cell at point A shown;

[0037] Figure 6 for Figure 3 A partial enlarged view of position B of the battery shown;

[0038] Figure 7 A schematic structural diagram of a busbar of a battery provided in some embodiments of the present application;

[0039] Figure 8 A schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0040] Figure 9 for Figure 8 A partial enlarged view of position C of the battery shown;

[0041] Figure 10 A schematic structural diagram of a busbar of a battery provided in some other embodiments of the present application;

[0042] Figure 11 A schematic diagram of a partial structure of a battery provided in some further embodiments of the present application;

[0043] Figure 12 for Figure 11 A partial enlarged view of D of the battery shown;

[0044] Figure 13 Schematic diagram of the structure of the battery busbar provided in some further embodiments of the present application.

[0045] Icon: 1000-vehicle; 100-battery; 10-battery cell; 11-electrode lead-out portion; 111-end face; 112-side face; 1121-first side face; 1122-second side face; 1123-chamfered face; 12-first surface; 13-first edge; 14-second surface; 15-groove; 20-box; 21-first box body; 22-second box body; 30-merging piece; 31-merging portion; 32-connecting portion; 321-first connecting section; 322-flanging section; 323-second connecting section; 324-third connecting section; 200-controller; 300-motor; X-first direction; Y-length direction of the battery cell; Z-width direction of the battery cell. DETAILED DESCRIPTION

[0046] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only 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-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0048] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0049] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0050] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0051] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0052] The term "plurality" used in this application refers to two or more (including two).

[0053] In this application, battery cells may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application do not limit this. Battery cells may be cylindrical, flat, rectangular, or other shapes, etc., and the embodiments of this application do not limit this. Battery cells are generally divided into three types based on the packaging method: cylindrical battery cells, prismatic battery cells, and soft-pack battery cells, and the embodiments of this application do not limit this.

[0054] The battery referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in this application may include a battery module or battery pack. A battery generally includes a casing that encloses one or more battery cells or multiple battery modules. The casing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0055] A battery cell includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. A battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive electrode collector. The uncoated positive electrode collector protrudes from the coated positive electrode collector, and the uncoated positive electrode collector serves as the positive electrode tab. For lithium-ion batteries, for example, the positive electrode current collector can be made of aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative electrode collector. The uncoated negative electrode collector protrudes from the coated negative electrode collector, and the uncoated negative electrode collector serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current can pass without melting, the positive electrode tabs are multiple and stacked together, and the negative electrode tabs are multiple and stacked together.

[0056] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a wound structure or a laminated structure, but the embodiments of the present application are not limited thereto.

[0057] New energy vehicles have experienced rapid development in recent years. In the electric vehicle sector, power batteries, as the power source, play an irreplaceable and important role. A battery consists of a housing and multiple battery cells housed within it. When assembling multiple battery cells within the housing, they must be stacked and connected with components such as busbars to achieve series or parallel connection, meeting practical requirements.

[0058] The inventors discovered that, for general battery cells, the battery cells are also provided with poles for outputting or inputting electrical energy, and by connecting the poles of multiple battery cells through a busbar, multiple battery cells can be connected in series or in parallel. In the prior art, in order to optimize the internal space of the battery and improve the energy density of the battery, multiple battery cells are usually stacked and the poles of the battery cells for outputting or inputting electrical energy are arranged on the surface of the battery cells stacked together, thereby saving the space occupied by the multiple battery cells in the box and improving the overall energy density of the battery. However, in batteries with this structure, since the poles are arranged on the sides of the battery cells stacked together, the space where the poles are located is relatively narrow, which makes it difficult to operate the busbar when connecting with the poles of the battery cells, making the battery assembly more difficult, which is not conducive to improving the production and assembly efficiency of the battery.

[0059] Based on the above considerations, in order to solve the problem of low battery production efficiency caused by the difficulty of battery assembly, the inventors have designed a battery after in-depth research. The battery includes a busbar and multiple battery cells. The multiple battery cells are stacked along a first direction. The battery cells have electrode lead-out portions. The electrode lead-out portions are arranged on the first surface of the battery cells in the first direction. The electrode lead-out portions are used to output or input electrical energy from the battery cells. The busbar connects the electrode lead-out portions of two adjacent battery cells. The electrode lead-out portions have an end face arranged opposite to the first surface along the first direction and a side face arranged around the end face. The busbar is connected to the side face.

[0060] In a battery of this structure, the battery comprises a plurality of battery cells stacked in a first direction. Each battery cell has a first surface on one side in the first direction, and an electrode lead portion of each battery cell is disposed on the first surface. A current collector is connected to the electrode lead portions of two adjacent battery cells to achieve series connection between the two battery cells. The electrode lead portions have side surfaces surrounding the end surfaces, i.e., the side surfaces are perpendicular to the first surface. Connecting the current collector to the side surfaces of the electrode lead portions can, on the one hand, alleviate the phenomenon of the current collector occupying space between the plurality of battery cells stacked in the first direction, thereby saving space occupied in the first direction after the plurality of battery cells and the current collector are assembled. On the other hand, the connection direction between the current collector and the electrode lead portions is perpendicular to the first direction, so that the current collector and the electrode lead portions are not affected by interference from the two adjacent battery cells when connected to each other. This reduces the difficulty of connecting the current collector and the electrode lead portions, facilitates operation, and effectively reduces the difficulty of battery assembly, thereby improving battery production efficiency.

[0061] The batteries disclosed in the embodiments of this application can be used, but are not limited to, in electrical devices such as vehicles, ships, or aircraft. A power supply system comprising the batteries disclosed in this application can be constructed. This battery structure reduces assembly complexity and improves battery production efficiency.

[0062] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0063] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0064] Please refer to Figure 1 , Figure 1A schematic structural diagram of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000. The battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000. For example, the battery 100 may serve as an operating power source for the vehicle 1000. The vehicle 1000 may further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, to meet the power requirements for starting, navigating and driving the vehicle 1000.

[0065] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0066] According to some embodiments of this application, please refer to Figure 2 and Figure 3 , Figure 2 This is an exploded view of the structure of the battery 100 provided in some embodiments of the present application. Figure 3 Schematic diagram of a partial structure of a battery 100 provided in some embodiments of the present application. The present application provides a battery 100, which includes a plurality of battery cells 10, and the plurality of battery cells 10 are stacked along a first direction X.

[0067] In some embodiments, the battery 100 may further include a case 20 having an assembly space for accommodating the battery cells 10 . The battery cells 10 are accommodated in the case 20 .

[0068] Among them, the box body 20 can adopt various structures. For example, Figure 2 In the embodiment, the box body 20 may include a first box body 21 and a second box body 22. The first box body 21 and the second box body 22 cover each other, and the first box body 21 and the second box body 22 jointly define an assembly space for accommodating the battery cells 10. The second box body 22 may be a hollow structure with one end open, and the first box body 21 may be a plate-like structure. The first box body 21 covers the open side of the second box body 22, so that the first box body 21 and the second box body 22 jointly define an assembly space.

[0069] In other embodiments, the first box body 21 and the second box body 22 may also be hollow structures with one side open, and the open side of the first box body 21 covers the open side of the second box body 22. Of course, the box body 20 formed by the first box body 21 and the second box body 22 can be of various shapes, such as a cylinder, a cuboid, etc.

[0070] In the battery 100, the multiple battery cells 10 connected via the busbar 30 can be connected in series, in parallel, or in a hybrid configuration. A hybrid configuration refers to a combination of series and parallel configurations within the multiple battery cells 10. The multiple battery cells 10 can be directly connected in series, in parallel, or in a hybrid configuration, and then the entire structure of the multiple battery cells 10 is housed within the housing 20. Alternatively, the battery 100 can be constructed by first connecting multiple battery cells 10 in series, in parallel, or in a hybrid configuration to form a battery module 100. The multiple battery modules 100 are then connected in series, in parallel, or in a hybrid configuration to form a single unit housed within the housing 20.

[0071] Each battery cell 10 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 10 can be cylindrical, flat, rectangular or other shapes. For example, in Figure 3 In the figure, the battery cell 10 is a rectangular parallelepiped structure.

[0072] According to some embodiments of the present application, referring to Figure 3 , and please refer to Figure 4 、 Figure 5 and Figure 6 , Figure 4 This is a schematic diagram of the structure of a battery cell 10 provided in some embodiments of the present application. Figure 5 for Figure 4 The partial enlarged view of the battery cell 10 at A is shown. Figure 6 for Figure 3 A partial enlarged view of a portion B of a battery 100 is shown. The battery cell 10 has an electrode lead-out portion 11 disposed on a first surface 12 of the battery cell 10 in a first direction X. The electrode lead-out portion 11 is used to output or input electrical energy from the battery cell 10. The battery 100 also includes a busbar 30 that connects the electrode lead-out portions 11 of two adjacent battery cells 10. The electrode lead-out portion 11 has an end surface 111 disposed opposite the first surface 12 in the first direction X, and a side surface 112 surrounding the end surface 111. The busbar 30 is connected to the side surface 112.

[0073] The electrode lead-out portion 11 serves to output or input the electrical energy of the battery cell 10. The electrode lead-out portion 11 may be a pole or an electrode terminal provided on the first surface 12. Figure 4 In the embodiment, there are two electrode lead-out portions 11 , and both electrode lead-out portions 11 are disposed on the first surface 12 . The two electrode lead-out portions 11 serve as the positive electrode output and the negative electrode output of the battery cell 10 , respectively.

[0074] The shape of the electrode lead portion 11 can also be various, for example, a cylindrical structure or a rectangular parallelepiped structure. Figure 5In the figure, the electrode lead portion 11 is a rectangular parallelepiped structure.

[0075] The first surface 12 is a surface on one side of the battery cell 10 in the first direction X. Figure 4 In the embodiment, the battery cell 10 is a rectangular parallelepiped structure, and the first direction X is the thickness direction of the battery cell 10 . Therefore, the first surface 12 is a surface with the largest area among the outer surfaces of the battery cell 10 .

[0076] The busbar 30 serves to connect the electrode lead-out portions 11 of two adjacent battery cells 10 to achieve electrical connection between the two battery cells 10 , thereby meeting the requirements of series or parallel connection of the two adjacent battery cells 10 .

[0077] The electrode lead-out portion 11 has an end face 111 arranged opposite to the first surface 12 along the first direction X and a side face 112 surrounding the end face 111, wherein the end face 111 is the surface of the electrode lead-out portion 11 facing away from the first surface 12, and the side face 112 is a circumferential surface surrounding the end face 111 and interconnected with the end face 111, that is, the side face 112 is a surface of the electrode lead-out portion 11 that is perpendicular to the first surface 12.

[0078] Optionally, the busbar 30 can be connected to the side surface 112 of the electrode lead portion 11 in various ways. For example, the busbar 30 and the side surface 112 of the electrode lead portion 11 can be connected to each other by welding, bolting, etc. For example, in the embodiment of the present application, the busbar 30 is connected to the side surface 112 of the electrode lead portion 11 by welding.

[0079] The battery 100 has a plurality of battery cells 10 stacked along a first direction X. The battery cells 10 have a first surface 12 on one side in the first direction X, and the electrode lead-out portion 11 of the battery cell 10 is arranged on the first surface 12. By connecting the electrode lead-out portions 11 of two adjacent battery cells 10 with a busbar 30, the two battery cells 10 are connected in series. Among them, the electrode lead-out portion 11 has a side surface 112 surrounding the end surface 111, that is, the side surface 112 is a surface perpendicular to the first surface 12. By connecting the busbar 30 to the side surface 112 of the electrode lead-out portion 11, on the one hand, it can alleviate the phenomenon that the busbar 30 occupies the space of multiple battery cells 10 stacked on each other in the first direction X, so as to save the space occupied by multiple battery cells 10 and the busbar 30 in the first direction X after being assembled. On the other hand, the connection direction between the busbar 30 and the electrode lead-out portion 11 is perpendicular to the first direction X, so that the busbar 30 and the electrode lead-out portion 11 will not be affected by the interference of the two adjacent battery cells 10 when connected to each other, thereby reducing the difficulty of connecting between the busbar 30 and the electrode lead-out portion 11, facilitating operation, and thus effectively reducing the difficulty of assembling the battery 100, thereby improving the production efficiency of the battery 100.

[0080] According to some embodiments of the present application, see Figure 4 、 Figure 5 and Figure 6 As shown, the battery cell 10 is a rectangular parallelepiped structure, wherein the first direction X, the length direction Y and the width direction Z of the battery cell are perpendicular to each other. The busbar 30 bypasses one side of the battery cell 10 in the width direction Z of the battery cell.

[0081] The first direction X is perpendicular to the length direction Y and the width direction Z of the battery cell. That is, the first direction X is the thickness direction of the battery cell 10 .

[0082] The busbar 30 bypasses one side of the battery cell 10 in the width direction Z of the battery cell, that is, after the busbar 30 is connected to the electrode lead-out portion 11 of a battery cell 10, it bypasses one side of the battery cell 10 in the width direction Z of the battery cell and is then connected to the electrode lead-out portion 11 of another adjacent battery cell 10. In other words, part of the busbar 30 is located on one side of the battery cell 10 in the width direction Z of the battery cell.

[0083] By setting the busbar 30 to bypass one side of the battery cell 10 in the width direction Z of the battery cell and then connect to the side faces 112 of the two electrode lead-out portions 11, that is, the busbar 30 bypasses the longer side face 112 of the battery cell 10. This structure can effectively save the space occupied by the battery cell 10 and the busbar 30 in the length direction Y of the battery cell after they are assembled with each other, and facilitates the assembly of the whole formed by connecting multiple battery cells 10 and the busbar 30 into the box 20 of the battery 100, which helps to reduce the difficulty of assembling the battery 100.

[0084] According to some embodiments of the present application, referring to Figure 5 and Figure 6 , and please refer to Figure 7 , Figure 7 Schematic diagram of the structure of the current collector 30 of the battery 100 provided in some embodiments of the present application. The current collector 30 includes a current collector portion 31 and two connecting portions 32. Along the width direction Z of the battery cell, the current collector portion 31 is located on one side of the battery cell 10. Along the first direction X, the two connecting portions 32 are located on either side of the battery cell 10 and connected to the ends of the current collector portion 31. The two connecting portions 32 are respectively connected to the side surfaces 112 of the two electrode lead portions 11.

[0085] The busbar 30 is provided with a busbar portion 31 and two connecting portions 32. The busbar portion 31 is arranged on one side of the battery cell 10 in the width direction Z of the battery cell. The two connecting portions 32 are respectively located on both sides of the battery cell 10 in the first direction X, and each connecting portion 32 is used to connect the busbar portion 31 and the side surface 112 of an electrode lead-out portion 11 to enable the busbar 30 to bypass one side of the battery cell 10 in the width direction Z of the battery cell. This structure is simple and easy to manufacture and assemble.

[0086] In some embodiments, see Figure 5 、 Figure 6 and Figure 7 As shown, the side surface 112 includes a first side surface 1121 . The first side surface 1121 is perpendicular to the length direction Y of the battery cell, and the connecting portion 32 is connected to the first side surface 1121 .

[0087] The first side surface 1121 is perpendicular to the length direction Y of the battery cell, that is, the first side surface 1121 is one of the two surfaces of the electrode lead-out portion 11 that are oppositely arranged in the length direction Y of the battery cell.

[0088] Exemplarily, the connecting portion 32 is a strip-shaped structure extending along the width direction Z of the battery cell.

[0089] Exemplarily, the connecting portion 32 is welded to the first side surface 1121 .

[0090] The side surface 112 includes a first side surface 1121 perpendicular to the length direction Y of the battery cell, and the connecting portion 32 is connected to the first side surface 1121, that is, the connecting portion 32 is connected to the side of the electrode lead-out portion 11 in the length direction Y of the battery cell. This structure enables the connection direction of the connecting portion 32 and the first side surface 1121 to be the length direction Y of the battery cell, thereby effectively avoiding the busbar 31 located on the side of the battery cell 10 in the width direction Z of the battery cell, which is conducive to further reducing the difficulty of connection between the busbar 30 and the electrode lead-out portion 11.

[0091] According to some embodiments of the present application, see Figure 5 and Figure 6 As shown, along the length direction Y of the battery cell, the battery cell 10 has a first edge 13 located at one end of the battery cell 10, the electrode lead-out portion 11 is arranged in an area of ​​the first surface 12 close to the first edge 13, and the surface of the electrode lead-out portion 11 facing the first edge 13 is the first side surface 1121.

[0092] Among them, the electrode lead-out portion 11 is arranged in an area of ​​the first surface 12 close to the first edge 13, that is, in the length direction Y of the battery cell, the position of the electrode lead-out portion 11 is closer to the first edge 13 of the battery cell 10 than the center position of the first surface 12, that is, the electrode lead-out portion 11 is arranged close to one end of the battery cell 10 in the length direction Y of the battery cell.

[0093] The surface of the electrode lead portion 11 facing the first edge 13 is the first side surface 1121 , that is, the one of the two surfaces of the electrode lead portion 11 opposite to each other in the longitudinal direction Y of the battery cell facing the first edge 13 is the first side surface 1121 .

[0094] By arranging the electrode lead-out portion 11 in an area of ​​the first surface 12 close to the first edge 13 of the battery cell 10, and the surface of the electrode lead-out portion 11 facing the first edge 13 in the length direction Y of the battery cell is the first side surface 1121, the first side surface 1121 where the electrode lead-out portion 11 is connected to the connecting portion 32 of the busbar 30 is closer to the first edge 13 of the battery cell 10, thereby reducing the interference effect caused by the mutual connection between the connecting portion 32 and the first side surface 1121.

[0095] According to some embodiments of the present application, see Figure 6 and Figure 7 As shown, along the length direction Y of the battery cell, at least a portion of the connecting portion 32 is located between the first side surface 1121 and the first edge 13 .

[0096] At least a portion of the connection portion 32 is located between the first side surface 1121 and the first edge 13 , that is, at least a portion of the connection portion 32 is accommodated between the first side surface 1121 and the first edge 13 in the length direction Y of the battery cell.

[0097] By locating at least a portion of the connecting portion 32 between the first side surface 1121 and the first edge 13 in the length direction Y of the battery cell, that is, at least a portion of the connecting portion 32 is accommodated between the first side surface 1121 and the first edge 13, the phenomenon that the connecting portion 32 occupies too much space of the battery cell 10 in the length direction Y of the battery cell can be reduced.

[0098] In some embodiments, the connection portion 32 does not extend beyond the first edge 13 along the direction from the first side surface 1121 to the first edge 13. That is, the connection portion 32 of the current busbar 30 is entirely accommodated between the first side surface 1121 and the first edge 13 in the length direction Y of the battery cell.

[0099] By setting the connecting portion 32 so as not to exceed the first edge 13 in the longitudinal direction Y of the battery cell, that is, the connecting portion 32 is located as a whole between the first side surface 1121 and the first edge 13, the space occupied by the battery cell 10 and the busbar 30 in the longitudinal direction Y of the battery cell after being assembled with each other is saved, which is beneficial to improving the energy density of the battery 100.

[0100] According to some embodiments of the present application, referring to Figure 5 , and please refer to Figure 8 and Figure 9 , Figure 8 Schematic diagram of a partial structure of a battery 100 provided in some embodiments of the present application, Figure 9 for Figure 8 The battery 100 is shown in a partially enlarged view at point C. The side surface 112 includes a second side surface 1122 . The second side surface 1122 is perpendicular to the width direction Z of the battery cell. The connecting portion 32 is connected to the second side surface 1122 .

[0101] The second side surface 1122 is perpendicular to the width direction Z of the battery cell, that is, the second side surface 1122 is one of the two surfaces of the electrode lead-out portion 11 that are oppositely arranged in the width direction Z of the battery cell.

[0102] Exemplarily, the connecting portion 32 is welded to the second side surface 1122 .

[0103] The side surface 112 includes a second side surface 1122 perpendicular to the width direction Z of the battery cell, and the connecting portion 32 is connected to the second side surface 1122, that is, the connecting portion 32 is connected to the side of the electrode lead-out portion 11 in the width direction Z of the battery cell. Since the busbar 31 of the busbar 30 is located on the side of the battery cell 10 in the width direction Z of the battery cell, this structure can shorten the length of the connecting portion 32 connected between the second side surface 1122 and the busbar 31, which is beneficial to saving materials of the busbar 30 and reducing production costs.

[0104] In some embodiments, reference Figure 8 and Figure 9 , and please refer to Figure 10 , Figure 10 Schematic diagram of the structure of the current collector 30 of the battery 100 provided in further embodiments of the present application. The connecting portion 32 includes a first connecting section 321 and a flanged edge section 322 that are interconnected. The first connecting section 321 extends along the width direction Z of the battery cell and is connected to the current collector 31. The flanged edge section 322 extends from the first connecting section 321 in a direction away from the first surface 12 along the first direction X and is connected to the second side surface 1122.

[0105] One end of the first connecting segment 321 in the width direction Z of the battery cell is connected to one end of the current collector 31 in the first direction X. The flange segment 322 extends from the first connecting segment 321 in a direction away from the first surface 12. That is, the flange portion extends from the first connecting segment 321 along the first direction X away from the first surface 12, so that the flange portion and the first connecting segment 321 form a mutually perpendicular structure, thereby forming a structure similar to the Chinese character "J" (F) of the current collector 30, so that the flange portion and the second side surface 1122 can be connected to each other.

[0106] By setting the connecting portion 32 of the busbar 30 into a first connecting section 321 and a flange section 322 that are connected to each other and perpendicular to each other, the connecting portion 32 has a first connecting section 321 connected to the busbar 31 of the busbar 30 and a flange section 322 that is parallel to the second side 1122, so that the electrical connection between the electrode lead portion 11 and the busbar 30 can be achieved by connecting the flange section 322 to the second side 1122. On the one hand, this structure can increase the connection area between the connecting portion 32 and the second side 1122 to improve the flow area. On the other hand, the area where the flange portion and the second side 1122 are connected to each other will not be blocked or interfered with by the first connecting section 321, which is beneficial to reducing the difficulty of connection between the connecting portion 32 and the second side 1122.

[0107] According to some embodiments of the present application, referring to Figure 5 , and please refer to Figure 11 and Figure 12 , Figure 11 Schematic diagram of a partial structure of a battery 100 provided in some embodiments of the present application, Figure 12 for Figure 11 The battery 100 is shown in a partially enlarged view at point D. The side surface 112 includes a first side surface 1121, a chamfered surface 1123, and a second side surface 1122. The first side surface 1121 is perpendicular to the length direction Y of the battery cell, and the second side surface 1122 is perpendicular to the width direction Z of the battery cell. The chamfered surface 1123 connects the first side surface 1121 and the second side surface 1122, and the connecting portion 32 is connected to the chamfered surface 1123.

[0108] Among them, the chamfered surface 1123 is a surface connecting the first side surface 1121 and the second side surface 1122. Since the first side surface 1121 is perpendicular to the length direction Y of the battery cell and the second side surface 1122 is perpendicular to the width direction Z of the battery cell, the chamfered surface 1123 is a surface that intersects with both the length direction Y and the width direction Z of the battery cell.

[0109] Exemplarily, the connecting portion 32 is welded to the chamfered surface 1123 .

[0110] The side surface 112 includes a first side surface 1121, a chamfered surface 1123 and a second side surface 1122 connected in sequence. The first side surface 1121 and the second side surface 1122 are respectively perpendicular to the length direction Y of the battery cell and the width direction Z of the battery cell. That is to say, the connecting portion 32 is connected to the chamfered surface 1123 which intersects with the length direction Y and the width direction Z of the battery cell. On the one hand, this structure enables the connection direction of the connecting portion 32 and the chamfered surface 1123 to effectively avoid the busbar 31 located on one side of the battery cell 10 in the width direction Z of the battery cell, which is beneficial to further reduce the difficulty of connecting the busbar 30 and the electrode lead-out portion 11. On the other hand, it can shorten the length of the connecting portion 32 connected between the chamfered surface 1123 and the busbar 31, which is beneficial to saving the material cost of the busbar 30.

[0111] In some embodiments, reference Figure 11 and Figure 12 , and please refer to Figure 13 , Figure 13 This is a schematic diagram of the structure of the current collector 30 of the battery 100 provided in some further embodiments of the present application. The connecting portion 32 includes a second connecting segment 323 and a third connecting segment 324 that are interconnected. The second connecting segment 323 extends along the width direction Z of the battery cell and is connected to the current collector 31. The third connecting segment 324 is bent relative to the second connecting segment 323 and connected to the chamfered surface 1123.

[0112] One end of the second connecting section 323 in the width direction Z of the battery cell is connected to one end of the confluence portion 31 in the first direction X. The third connecting section 324 is bent relative to the second connecting section 323, that is, the third connecting section 324 is arranged at an angle to the second connecting section 323. For example, Figure 13 In the embodiment, the angle formed between the third connecting section 324 and the second connecting section 323 is an obtuse angle.

[0113] By setting the connecting portion 32 of the busbar 30 as a second connecting segment 323 and a third connecting segment 324 that are connected to each other, the second connecting segment 323 extends along the width direction Z of the battery cell, and the third connecting segment 324 is bent relative to the second connecting segment 323, so that the third connecting segment 324 can be parallel to the chamfered surface 1123, so that the third connecting segment 324 can be connected to the chamfered surface 1123.

[0114] According to some embodiments of the present application, see Figure 6 、 Figure 9 and Figure 12 As shown, along the length direction Y of the battery cell, the busbar 30 does not extend beyond both ends of the battery cell 10 .

[0115] The busbar 30 does not extend beyond both ends of the battery cell 10 , that is, the busbar 30 is located between the two ends of the battery cell 10 in the length direction Y of the battery cell.

[0116] By setting the busbar 30 so as not to exceed the two ends of the battery cell 10 in the longitudinal direction Y of the battery cell, the busbar 30 is located between the two ends of the battery cell 10 in the longitudinal direction Y of the battery cell, thereby effectively saving the space occupied by the battery cell 10 and the busbar 30 in the longitudinal direction Y of the battery cell after they are assembled together, thereby improving the overall energy density of the battery 100.

[0117] According to some embodiments of the present application, see Figure 3 、 Figure 4 and Figure 5 As shown, the battery cell 10 has a second surface 14 disposed opposite the first surface 12 along the first direction X. The second surface 14 is recessed to form a groove 15. The groove 15 is used to accommodate the electrode lead portion 11 of the battery cell 10 adjacent to the second surface 14. The groove 15 passes through one end of the battery cell 10 along the length direction Y of the battery cell, and the groove 15 passes through both ends of the battery cell 10 along the width direction Z of the battery cell.

[0118] The second surface 14 is an outer surface of the battery cell 10 that is arranged opposite the first surface 12 in the first direction X. The groove 15 extends through one end of the battery cell 10 along the length direction Y of the battery cell, and extends through both ends of the battery cell 10 along the width direction Z of the battery cell. In other words, the groove 15 is a notch provided on the second surface 14 and is used to accommodate the electrode lead-out portion 11 of an adjacent battery cell 10. This allows the electrode lead-out portion 11 of the battery cell 10 to be accommodated in the groove 15 on the second surface 14 of the adjacent battery cell 10 after the multiple battery cells 10 are stacked on each other along the first direction X.

[0119] By providing a groove 15 for accommodating the electrode lead portion 11 of an adjacent battery cell 10 on the second surface 14 of the battery cell 10, which is arranged opposite the first surface 12 along the first direction X, the stacking of the multiple battery cells 10 along the first direction X can effectively save the space occupied by the multiple battery cells 10 stacked in the first direction X. In addition, by extending the groove 15 through one end of the battery cell 10 along the length direction Y of the battery cell and through both ends of the battery cell 10 along the width direction Z of the battery cell, a clearance space is provided when the busbar 30 is connected to the electrode lead portion 11, thereby facilitating the connection between the busbar 30 and the side surface 112 of the electrode lead portion 11, thereby reducing the difficulty of connecting the busbar 30 to the electrode lead portion 11.

[0120] According to some embodiments of the present application, an electric device is further provided. The electric device includes the battery 100 of any of the above solutions, and the battery 100 is used to provide electric energy to the electric device.

[0121] The electrical device may be any of the aforementioned devices or systems using the battery cell 10 or the battery 100 .

[0122] According to some embodiments of the present application, see Figures 3 to 13As shown, the present application provides a battery 100, which includes a busbar 30 and multiple battery cells 10. The multiple battery cells 10 are stacked along a first direction X. The battery cells 10 have electrode lead portions 11, which are arranged on first surfaces 12 of the battery cells 10 in the first direction X. The electrode lead portions 11 have end surfaces 111 arranged opposite to the first surface 12 along the first direction X and side surfaces 112 surrounding the end surfaces 111. The busbar 30 connects the electrode lead portions 11 of two adjacent battery cells 10 and is connected to the side surfaces 112. The battery cells 10 are rectangular parallelepiped structures, and the first direction X, the length direction Y of the battery cells, and the width direction Z of the battery cells are perpendicular to each other. The busbar 30 includes a busbar portion 31 and two connecting portions 32. The busbar portion 31 is along the width direction Z of the battery cell. The busbar portion 31 is located on one side of the battery cell 10. Along the first direction X, the two connecting portions 32 are respectively located on both sides of the battery cell 10 and connected to the two ends of the busbar portion 31. The two connecting portions 32 are respectively connected to the side surfaces 112 of the two electrode lead-out portions 11.

[0123] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0124] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery, characterized in that: include: A plurality of battery cells are stacked along a first direction, each battery cell having an electrode lead-out portion, the electrode lead-out portion being provided on a first surface of the battery cell in the first direction, the electrode lead-out portion being used to output or input electrical energy from the battery cell; as well as a busbar connecting the electrode lead portions of two adjacent battery cells; The electrode lead portion has an end surface arranged opposite to the first surface along the first direction and a side surface surrounding the end surface, and the current collector is connected to the side surface.

2. The battery according to claim 1, characterized in that The battery cell is a rectangular parallelepiped structure, and the first direction, the length direction of the battery cell, and the width direction of the battery cell are perpendicular to each other; The current collector bypasses one side of the battery cell in a width direction of the battery cell.

3. The battery according to claim 2, characterized in that The busbar comprises: a confluence portion, located on one side of the battery cell along a width direction of the battery cell; Two connecting parts are respectively located on both sides of the battery cell along the first direction and connected to both ends of the busbar, and are respectively connected to the side surfaces of the two electrode lead-out parts.

4. The battery according to claim 3, characterized in that The side surfaces include a first side surface, the first side surface is perpendicular to a length direction of the battery cell, and the connecting portion is connected to the first side surface.

5. The battery according to claim 4, characterized in that Along the length direction of the battery cell, the battery cell has a first edge located at one end of the battery cell, the electrode lead portion is arranged in an area of ​​the first surface close to the first edge, and the surface of the electrode lead portion facing the first edge is the first side surface.

6. The battery according to claim 5, characterized in that Along a length direction of the battery cell, at least a portion of the connecting portion is located between the first side surface and the first edge.

7. The battery according to claim 6, characterized in that Along a direction from the first side surface to the first edge, the connecting portion does not exceed the first edge.

8. The battery according to claim 3, characterized in that The side surface includes a second side surface, the second side surface is perpendicular to a width direction of the battery cell, and the connecting portion is connected to the second side surface.

9. The battery according to claim 8, characterized in that The connecting portion includes a first connecting section and a flanging section connected to each other; The first connecting section extends along the width direction of the battery cell and is connected to the confluence portion; Along the first direction, the flange segment extends from the first connecting segment in a direction away from the first surface and is connected to the second side surface.

10. The battery according to claim 3, characterized in that The side surface includes a first side surface, a chamfered surface, and a second side surface. The first side surface is perpendicular to the length direction of the battery cell, the second side surface is perpendicular to the width direction of the battery cell, the chamfered surface connects the first side surface and the second side surface, and the connecting portion is connected to the chamfered surface.

11. The battery according to claim 10, characterized in that The connecting portion includes a second connecting segment and a third connecting segment connected to each other; The second connecting section extends along the width direction of the battery cell and is connected to the confluence portion; The third connecting section is bent relative to the second connecting section and connected to the chamfered surface.

12. The battery according to claim 2, characterized in that Along the length direction of the battery cell, the current busbar does not exceed both ends of the battery cell.

13. The battery according to any one of claims 1 to 12, characterized in that: Along the first direction, the battery cell has a second surface disposed opposite to the first surface; The second surface is recessed to form a groove, which is used to accommodate the electrode lead-out portion of the battery cell adjacent to the second surface. The groove passes through one end of the battery cell along the length direction of the battery cell, and the groove passes through both ends of the battery cell along the width direction of the battery cell.

14. An electrical device, characterized in that: The battery comprises the battery according to any one of claims 1 to 13, wherein the battery is used to provide electrical energy.

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