Battery and electric equipment

Abstract

The embodiment of the utility model provides a battery and electric equipment, the battery comprises a box body and a plurality of battery monomers, and the plurality of battery monomers are stacked along a first direction; the box body is used for accommodating a plurality of battery monomers, the box body comprises a bottom wall and two first side walls which are oppositely arranged along a second direction, the bottom wall is used for supporting the plurality of battery monomers, the first side walls are connected to the bottom wall, and the second direction is perpendicular to the first direction; wherein at least one battery monomer comprises a pressure relief mechanism, and the pressure relief mechanism is arranged at at least one end of the battery monomer in the second direction. In the second direction, the reserved space between the single battery and the first side wall of the box body is large, so that the pressure relief mechanism can quickly release the pressure in the single battery after being opened, and the possibility of thermal runaway and even explosion of the single battery is reduced.

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

[0003] In battery technology, how to reduce the probability of battery thermal runaway is a technical problem that needs to be solved urgently. Utility Model Content

[0004] The embodiments of the present application provide a battery and an electrical device, which can reduce the probability of thermal runaway of the battery.

[0005] In a first aspect, an embodiment of the present application provides a battery, comprising:

[0006] A plurality of battery cells, wherein the plurality of battery cells are stacked along a first direction;

[0007] A box body, used to accommodate a plurality of battery cells, the box body comprising a bottom wall and two first side walls arranged opposite to each other along a second direction, the bottom wall being used to support the plurality of battery cells, the first side walls being connected to the bottom wall, and the second direction being perpendicular to the first direction;

[0008] Wherein, at least one battery cell comprises a pressure relief mechanism, and the pressure relief mechanism is arranged at at least one end of the battery cell in the second direction.

[0009] In the above technical solution, the battery includes a plurality of battery cells and a box body, the box body is used to accommodate the plurality of battery cells, and can play a role in protecting and preventing dust from the battery cells; the box body includes a bottom wall and two first side walls arranged relatively along a second direction, the bottom wall is used to support the plurality of battery cells, the first side wall is connected to the bottom wall, the second direction is perpendicular to the first direction, and when the box body and the battery cells are assembled, along the second direction, space is reserved between the battery cells and the first side walls of the box body to accommodate other components, and the spacing distance is relatively large, while the spacing distance between the battery cells and other walls of the box body is relatively small, therefore, by arranging the pressure relief mechanism of at least one battery cell at at least one end of the battery cell in the second direction, the pressure relief mechanism can quickly release the pressure in the battery cell after opening, thereby reducing the possibility of thermal runaway or even explosion of the battery cell.

[0010] According to some embodiments of the present application, each battery cell includes a housing, a first electrode terminal and a second electrode terminal, the housing includes a first wall and a second wall oppositely disposed along a first direction, the first electrode terminal and the second electrode terminal protrude from the first wall, and the plurality of battery cells include adjacent first battery cells and second battery cells;

[0011] The battery further includes a busbar that connects a first electrode terminal of the first battery cell and a second electrode terminal of the second battery cell;

[0012] Among them, the two edge areas of the second wall in the second direction are respectively recessed to form a first recess and a second recess, at least a portion of the second electrode terminal of the second battery cell is accommodated in the first recess of the first battery cell, and at least a portion of the first electrode terminal of the second battery cell is accommodated in the second recess of the first battery cell.

[0013] In the above technical solution, each battery cell includes an outer shell, a first electrode terminal and a second electrode terminal, the outer shell includes a first wall and a second wall arranged opposite to each other along a first direction, the first electrode terminal and the second electrode terminal protrude from the first wall, and multiple battery cells can be conveniently electrically connected through the first electrode terminal and the second electrode terminal; the battery also includes a busbar, the busbar connects the first electrode terminal of the first battery cell and the second electrode terminal of the second battery cell, and the first battery cell can be electrically connected with the second battery cell; the two edge areas of the second wall in the second direction are respectively recessed to form a first recess and a second recess, at least a part of the second electrode terminal of the second battery cell is accommodated in the first recess of the first battery cell, and at least a part of the first electrode terminal of the second battery cell is accommodated in the second recess of the first battery cell, which can make the distance between the second battery cell and the first battery cell smaller or even close, so that the arrangement of multiple battery cells in the battery is more compact, which is beneficial to improve the energy density of the battery.

[0014] According to some embodiments of the present application, along the second direction, a projection of the pressure relief mechanism disposed on the first battery cell does not overlap with a projection of the busbar.

[0015] In the above technical solution, along the second direction, the projection of the pressure relief mechanism arranged on the first battery cell does not overlap with the projection of the busbar, so that when the pressure relief mechanism is opened, substances such as electrolyte and metal particles sprayed along the second direction are not easily splashed on the busbar, thereby reducing the risk of corrosion of the busbar, and can reduce the risk of short circuit, thermal runaway, etc. caused by insulation failure of the insulating layer arranged on the busbar.

[0016] According to some embodiments of the present application, the pressure relief mechanism protrudes from the busbar along the second direction.

[0017] In the above technical solution, the pressure relief mechanism protrudes from the busbar along the second direction, which can further make it difficult for substances such as electrolyte and metal particles sprayed along the second direction to splash on the busbar when the pressure relief mechanism is opened, thereby reducing the risk of corrosion of the busbar and reducing the risk of short circuit, thermal runaway, etc. caused by insulation failure of the insulating layer provided on the busbar.

[0018] According to some embodiments of the present application, the first battery cell is provided with a first notch, the first notch penetrates the first battery cell along a first direction, and at least a portion of the busbar is accommodated in the first notch.

[0019] In the above technical solution, the first battery cell is provided with a first notch, and the first notch penetrates the first battery cell along a first direction. At least a portion of the busbar is accommodated in the first notch, so that the busbar can pass through the first battery cell to connect the first electrode terminal of the first battery cell and the second electrode terminal of the second battery cell, and can reduce the size of the portion of the busbar protruding from the outer surface of the first battery cell, thereby reducing the possibility of deformation or damage of the busbar when the battery is subjected to force, and further reducing the possibility of short circuit, open circuit or even thermal runaway of multiple battery cells.

[0020] According to some embodiments of the present application, the first recess is communicated with the first notch.

[0021] In the above technical solution, by connecting the first recess with the first notch, it is possible to facilitate the connection between at least a portion of the busbar accommodated in the first notch and at least a portion of the second electrode terminal of the second battery cell accommodated in the first recess, and it is also convenient to prepare the first recess and the first notch, thereby improving the preparation efficiency of the battery.

[0022] According to some embodiments of the present application, the first notch is recessed from one side of the first battery cell in the third direction to the other side; the first direction, the second direction, and the third direction are perpendicular to each other.

[0023] In the above technical solution, by making the first notch recessed from one side of the first battery cell in the third direction to the other side, the preparation and forming of the first battery cell is facilitated, and at least a part of the busbar is arranged in the first notch.

[0024] According to some embodiments of the present application, along the second direction, the busbar does not extend beyond the outer surface of the first battery cell; along the third direction, the busbar does not extend beyond the outer surface of the first battery cell; the first direction, the second direction, and the third direction are perpendicular to each other.

[0025] In the above technical solution, along the second direction, the busbar does not extend beyond the outer surface of the first battery cell; along the third direction, the busbar does not extend beyond the outer surface of the first battery cell, so that when the first battery cell is subjected to external force in the second direction and the third direction, the external force is not easy to act directly on the busbar, thereby reducing the possibility of deformation or damage of the busbar causing short circuit, open circuit or even thermal runaway of multiple battery cells.

[0026] According to some embodiments of the present application, the busbar includes a busbar portion, a first connecting portion and a second connecting portion, the first connecting portion is connected to the first electrode terminal of the first battery cell, the second connecting portion is connected to the second electrode terminal of the second battery cell, the busbar portion connects the first connecting portion and the second connecting portion, and at least a portion of the busbar portion is accommodated in the first notch.

[0027] In the above technical solution, the busbar includes a busbar portion, a first connecting portion and a second connecting portion. The first connecting portion is connected to the first electrode terminal of the first battery cell, and the second connecting portion is connected to the second electrode terminal of the second battery cell. The busbar portion connects the first connecting portion and the second connecting portion, so as to realize the electrical connection between the first electrode terminal of the first battery cell and the second electronic terminal of the second battery cell. At least a portion of the busbar portion is accommodated in the first notch, so as to reduce the size of the portion of the busbar portion protruding from the outer surface of the first battery cell, thereby reducing the possibility of deformation or damage of the busbar portion when the battery is subjected to force, thereby reducing the possibility of short circuit, open circuit or even thermal runaway of multiple battery cells.

[0028] According to some embodiments of the present application, the first electrode terminal includes a first end surface and a first side surface, the first end surface is perpendicular to the first direction, the first side surface is perpendicular to the second direction, at least a portion of the first connection portion is connected to the first end surface, and at least a portion of the first connection portion is connected to the first side surface;

[0029] The second electrode terminal includes a second end surface and a second side surface, the second end surface is perpendicular to the first direction, the second side surface is perpendicular to the second direction, at least a portion of the second connection portion is connected to the second end surface, and at least a portion of the second connection portion is connected to the second side surface.

[0030] In the above technical solution, the first electrode terminal includes a first end surface and a first side surface, the first end surface is perpendicular to the first direction, the first side surface is perpendicular to the second direction, at least a portion of the first connecting portion is connected to the first end surface, and at least a portion of the first connecting portion is connected to the first side surface, which can facilitate the connection between the first connecting portion and the first electrode terminal, and the connection area is large, and the connection reliability is high;

[0031] The second electrode terminal includes a second end face and a second side face, the second end face is perpendicular to the first direction, the second side face is perpendicular to the second direction, at least a portion of the second connecting portion is connected to the second end face, and at least a portion of the second connecting portion is connected to the second side face, which can facilitate the connection between the second connecting portion and the second electrode terminal, and the connection area is large, and the connection reliability is high.

[0032] According to some embodiments of the present application, the first electrode terminal includes a third side surface, the third side surface is inclined relative to the first direction, and at least a portion of the first connecting portion is connected to the third side surface;

[0033] The second electrode terminal includes a fourth side surface, the fourth side surface is inclined relative to the first direction, and at least a portion of the second connection portion is connected to the fourth side surface.

[0034] In the above technical solution, the first electrode terminal includes a third side surface, the third side surface is inclined relative to the first direction, and at least a portion of the first connecting portion is connected to the third side surface, which can increase the connection area between the first electrode terminal and the first connecting portion, thereby improving the connection reliability between the first electrode terminal and the first connecting portion, and can set the dimensions of the first electrode terminal and the first connecting portion along the first direction to be smaller, so that the space occupied by the busbar is smaller, which is conducive to improving the energy density of the battery;

[0035] The second electrode terminal includes a fourth side surface, and the fourth side surface is inclined relative to the first direction. At least a portion of the second connecting portion is connected to the fourth side surface, which can increase the connection area between the second electrode terminal and the second connecting portion, thereby improving the connection reliability between the second electrode terminal and the second connecting portion, and can set the dimensions of the second electrode terminal and the second connecting portion along the first direction to be smaller, so that the space occupied by the busbar is smaller, which is beneficial to improving the energy density of the battery.

[0036] According to some embodiments of the present application, a first notch is disposed at each of the two ends of the first battery cell along the third direction, and the current collector is disposed at one of the two first notches away from the bottom wall;

[0037] The first direction, the second direction, and the third direction are perpendicular to each other.

[0038] In the above technical solution, a first notch is respectively provided at both ends of the first battery cell along the third direction, and the busbar is provided at one of the two first notches away from the bottom wall. The busbar can be installed after the battery cell is loaded into the box body, thereby simplifying the assembly difficulty of the battery and improving the assembly efficiency of the battery.

[0039] According to some embodiments of the present application, the structures of the plurality of battery cells are the same, and one of two adjacent battery cells is rotated 180° relative to the other.

[0040] In the above technical solution, the structures of multiple battery cells are the same, which can simplify the battery manufacturing process, reduce the battery manufacturing cost, and improve the battery manufacturing efficiency; one of the two adjacent battery cells is rotated 180° relative to the other, so that the electrode terminals of the two adjacent battery cells with opposite polarities can correspond and be connected to realize the series connection of multiple battery cells.

[0041] According to some embodiments of the present application, along the second direction, two second notches are provided at one end of the first battery cell opposite to the first notch, and the two second notches are respectively located at the two ends of the first battery cell along the third direction; the busbar is provided at one of the two second notches away from the bottom wall.

[0042] In the above technical solution, along the second direction, two second notches are provided at the end of the first battery cell opposite to the first notch, and the two second notches are respectively located at the two ends of the first battery cell along the third direction, so that when multiple battery cells of the same structure are stacked, no matter one of the two adjacent battery cells is rotated 180° relative to the other or not rotated, the two ends of the battery cell along the second direction can have the first notch or the second notch on the side away from the bottom wall, so that the busbar can be set in the first notch or the second notch away from the bottom wall; by setting the busbar in one of the two second notches away from the bottom wall, the busbar can be installed after the battery cell is loaded into the box, thereby simplifying the difficulty of battery assembly and improving battery assembly efficiency.

[0043] According to some embodiments of the present application, the housing includes a shell and a cover plate, the shell is provided with an opening, the cover plate closes the opening, and the cover plate is a first wall.

[0044] In a second aspect, an embodiment of the present application provides an electrical device, including a battery as described above, and the battery is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. 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 related drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0047] Figure 2 is a schematic diagram of an exploded structure of a battery provided in some embodiments of the present application;

[0048] Figure 3is a schematic diagram of a three-dimensional structure of a partial structure of a battery provided in some embodiments of the present application;

[0049] Figure 4 is a three-dimensional schematic diagram of a partial structure of a battery provided in some embodiments of the present application;

[0050] Figure 5 is a schematic diagram of the three-dimensional structure of a first battery cell of a battery provided in some embodiments of the present application;

[0051] Figure 6 is a schematic diagram of the three-dimensional structure of a second battery cell of a battery provided in some embodiments of the present application;

[0052] Figure 7 is a schematic diagram of the three-dimensional structure of a busbar of a battery provided in some embodiments of the present application;

[0053] Figure 8 is a three-dimensional schematic diagram of a partial structure of a battery provided in some other embodiments of the present application;

[0054] Fig. 9 is an exploded schematic diagram of a partial structure of a battery provided in some other embodiments of the present application;

[0055] Fig.10 is a structural schematic diagram of a first battery cell of a battery provided in some other embodiments of the present application from a perspective;

[0056] Fig.11 It is a structural schematic diagram from one perspective of a first battery cell of a battery provided in some other embodiments of the present application.

[0057] Icon: 1000-vehicle; 100-battery; 10-box; 110-first sub-box; 111-bottom wall; 112-first side wall; 120-second sub-box; 20-battery cell; 21-first battery cell; 201-first recess; 202-second recess; 203-first notch; 204-second notch; 210-pressure relief mechanism; 220-housing; 221-first wall; 222-second wall; 223-third wall; 224-fourth wall; 225- Shell; 226-cover; 230-first electrode terminal; 231-first end surface; 232-first side surface; 233-third side surface; 240-second electrode terminal; 241-second end surface; 242-second side surface; 243-fourth side surface; 22-second battery cell; 30-bus; 310-bus portion; 320-first connecting portion; 330-second connecting portion; 200-controller; 300-motor; X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0060] The terms "first", "second", etc. 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 and secondary relationship.

[0061] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0062] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0063] The term "plurality" used in the present application refers to two or more (including two).

[0064] 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-ion battery or a magnesium-ion battery, etc., which is not limited in the present embodiment. The battery cell may be flat, rectangular or in other shapes, etc., which is not limited in the present embodiment.

[0065] The battery mentioned in the embodiments of the present application refers to a single physical module including multiple battery cells to provide higher voltage and capacity. For example, the battery mentioned in the present application may include a battery module or a battery pack. The battery may also generally include a box for encapsulating one or more battery cells or multiple battery modules. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0066] The battery cell includes an electrode assembly and an electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector, and the current collector not coated with the positive electrode active material layer serves as the positive electrode tab. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode collector, and the current collector not coated with the negative electrode active material layer serves as the negative electrode tab. The material of the negative electrode collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current is passed without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together. The material of the isolation film can be PP (polypropylene) or PE (polyethylene).

[0067] Batteries have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and low self-discharge coefficient. They are an important part of the development of new energy today. With the development of the new energy industry, batteries are gradually moving towards large-scale and integrated development.

[0068] The pressure relief mechanism is set on the battery cell, which can be opened when the internal pressure and / or temperature of the battery cell is too high to form a pressure relief channel to release the internal pressure of the battery cell, thereby reducing the possibility of thermal runaway or even explosion of the battery cell. However, at present, the pressure relief mechanism of the battery cell in the battery is generally set on the side opposite to the top wall of the box, and the distance between the battery cell and the top wall of the box is small. After the pressure relief mechanism is opened, the internal pressure of the battery cell is blocked and the pressure relief speed is slow, which affects the pressure relief effect of the pressure relief mechanism. The possibility of thermal runaway or even explosion of the battery cell is high.

[0069] Based on the above considerations, the present application provides a battery, which includes a plurality of battery cells and a box body, wherein the plurality of battery cells are stacked along a first direction; the box body is used to accommodate the plurality of battery cells, and the box body includes a bottom wall and two first side walls arranged opposite to each other along a second direction, the bottom wall is used to support the plurality of battery cells, the first side walls are connected to the bottom wall, and the second direction is perpendicular to the first direction; wherein at least one battery cell includes a pressure relief mechanism, and the pressure relief mechanism is arranged at at least one end of the battery cell in the second direction.

[0070] In the technical solution of the present application, the battery includes a plurality of battery cells and a box body, the box body is used to accommodate the plurality of battery cells, and can play a role in protecting and preventing dust from the battery cells; the box body includes a bottom wall and two first side walls arranged opposite to each other along a second direction, the bottom wall is used to support the plurality of battery cells, the first side wall is connected to the bottom wall, the second direction is perpendicular to the first direction, and when the box body and the battery cells are assembled, along the second direction, space is reserved between the battery cells and the first side walls of the box body to accommodate other components, and the spacing distance is relatively large, while the spacing distance between the battery cells and other walls of the box body is relatively small, therefore, by arranging the pressure relief mechanism of at least one battery cell at at least one end of the battery cell in the second direction, the pressure relief mechanism can quickly release the pressure in the battery cell after opening, thereby reducing the possibility of thermal runaway or even explosion of the battery cell.

[0071] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. The battery disclosed in the present application can be used to form a power supply system of the electrical device.

[0072] The present application embodiment provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, an electric tool, a battery vehicle, an electric car, a ship, a spacecraft, etc. The spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0073] The battery described in the embodiments of the present application is not limited to the electrical devices described above, but can also be applied to all electrical devices using batteries. However, for the sake of simplicity, the following embodiments are described using an electrical device such as a vehicle as an example.

[0074] Please refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. Vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and 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, and 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 be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0075] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve 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.

[0076] Please refer to Figure 2 , Figure 2 Schematic diagram of the exploded structure of the battery provided in some embodiments of the present application. The battery 100 includes a box 10 and a battery cell 20, and the battery cell 20 is accommodated in the box 10. Among them, the box 10 is used to provide a storage space for the battery cell 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first sub-box 110 and a second sub-box 120, the first sub-box 110 and the second sub-box 120 cover each other, and the first sub-box 110 and the second sub-box 120 jointly define a storage space for accommodating the battery cell 20. The first sub-box 110 may be a hollow structure with one end open, and the second sub-box 120 may be a plate-like structure, and the second sub-box 120 covers the open side of the first sub-box 110, so that the first sub-box 110 and the second sub-box 120 jointly define a storage space; the first sub-box 110 and the second sub-box 120 may also be hollow structures both with one side open, and the open side of the second sub-box 120 covers the open side of the first sub-box 110.

[0077] In some embodiments, the box body 10 may be a rectangular parallelepiped.

[0078] In other embodiments, the box body 10 may also be a cylinder.

[0079] In some embodiments, the box body 10 may be made of aluminum, aluminum alloy or other metal materials, so that the box body 10 has a higher force-bearing performance.

[0080] In other embodiments, the box body 10 may also be made of non-metallic materials with relatively high strength, such as carbon fiber, hard plastic, etc.

[0081] Please refer to Figure 3 and Figure 4 , Figure 3 A schematic diagram of a three-dimensional structure of a partial structure of a battery provided in some embodiments of the present application, Figure 4 A three-dimensional schematic diagram of a partial structure of a battery provided in some embodiments of the present application.

[0082] The embodiment of the present application provides a battery 100, which includes a box body 10 and a plurality of battery cells 20, wherein the plurality of battery cells 20 are stacked along a first direction X. The box body 10 is used to accommodate the plurality of battery cells 20, and the box body 10 includes a bottom wall 111 and two first side walls 112 arranged opposite to each other along a second direction Y, wherein the bottom wall 111 is used to support the plurality of battery cells 20, and the first side walls 112 are connected to the bottom wall 111, and the second direction Y is perpendicular to the first direction X. Among them, at least one battery cell 20 includes a pressure relief mechanism 210, and the pressure relief mechanism 210 is arranged at at least one end of the battery cell 20 in the second direction Y.

[0083] In some embodiments, the battery cell 20 may be in the form of a rectangular parallelepiped, so that a plurality of battery cells 20 can be closely arranged in a matrix, which is beneficial to improving the energy density of the battery 100 .

[0084] In other embodiments, the battery cell 20 may also be in a flat body, a cylinder, or other shapes.

[0085] The battery includes a plurality of battery cells 20 and a box 10. The box 10 is used to accommodate the plurality of battery cells 20 and can protect and prevent dust from the battery cells 20. The box 10 includes a bottom wall 111 and two first side walls 112 arranged opposite to each other along a second direction Y. The bottom wall 111 is used to support the plurality of battery cells 20. The first side walls 112 are connected to the bottom wall 111. The second direction Y is perpendicular to the first direction X. When the box 10 and the battery cells 20 are assembled, along the second direction Y, a space is reserved between the battery cells 20 and the first side walls 112 of the box 10 to accommodate other components, and the spacing distance is large, while the spacing distance between the battery cells 20 and other walls of the box 10 is small. Therefore, by arranging the pressure relief mechanism 210 of at least one battery cell 20 at at least one end of the battery cell 20 in the second direction Y, the pressure relief mechanism 210 can quickly release the pressure in the battery cell 20 after opening, thereby reducing the possibility of thermal runaway or even explosion of the battery cell 20.

[0086] In some embodiments, the pressure relief mechanism 210 may be a notched groove that can be opened when the internal pressure of the battery cell 20 reaches a threshold value to form a pressure relief channel to release the pressure inside the battery cell 20 .

[0087] In some embodiments, the pressure relief mechanism 210 may be in an elliptical, circular, or racetrack shape, etc., and may form a pressure relief channel with a relatively large area to achieve rapid pressure relief.

[0088] Please refer to Figure 5 , Figure 5 A schematic diagram of the three-dimensional structure of a first battery cell of a battery provided in some embodiments of the present application.

[0089] In some embodiments, each battery cell 20 includes a housing 220 , a first electrode terminal 230 and a second electrode terminal 240 . The housing 220 includes a first wall 221 and a second wall 222 oppositely disposed along a first direction X. The first electrode terminal 230 and the second electrode terminal 240 are protruded from the first wall 221 .

[0090] In some embodiments, the housing 220 may be made of aluminum, aluminum alloy, or other metal materials, which can enable the battery cell 20 to have higher stress resistance.

[0091] Each battery cell 20 includes a shell 220, a first electrode terminal 230 and a second electrode terminal 240. The shell 220 includes a first wall 221 and a second wall 222 arranged opposite to each other along a first direction X. The first electrode terminal 230 and the second electrode terminal 240 are protruded from the first wall 221, which can facilitate electrical connection of multiple battery cells 20 through the first electrode terminal 230 and the second electrode terminal 240.

[0092] In some embodiments, the plurality of battery cells 20 include adjacent first and second battery cells 21 and 22 , and the battery further includes a busbar 30 connecting a first electrode terminal 230 of the first battery cell 21 and a second electrode terminal 240 of the second battery cell 22 .

[0093] In some embodiments, the first electrode terminal 230 and the second electrode terminal 240 may be made of metal materials such as copper-plated silver, copper-plated zinc, copper, aluminum, iron, etc., which can play a role in conducting electricity and transmitting electrical signals.

[0094] In some embodiments, the first electrode terminal 230 and the second electrode terminal 240 may be provided in a rectangular parallelepiped shape.

[0095] In other embodiments, the first electrode terminal 230 and the second electrode terminal 240 may also be provided in the shape of a cylinder, an elliptical cylinder, etc.

[0096] In some embodiments, the busbar 30 is made of a conductive material and can connect two electrode terminals to achieve electrical connection between two battery cells 20 .

[0097] In some embodiments, the busbar 30 may be connected to the first electrode terminal 230 and the second electrode terminal 240 by welding, bolting, or the like.

[0098] The battery further includes a busbar 30 , which connects the first electrode terminal 230 of the first battery cell 21 and the second electrode terminal 240 of the second battery cell 22 , thereby enabling electrical connection between the first battery cell 21 and the second battery cell 22 .

[0099] In some embodiments, the two edge areas of the second wall 222 in the second direction Y are respectively recessed to form a first recess 201 and a second recess 202, and at least a portion of the second electrode terminal 240 of the second battery cell 22 is accommodated in the first recess 201 of the first battery cell 21, and at least a portion of the first electrode terminal 230 of the second battery cell 22 is accommodated in the second recess 202 of the first battery cell 21.

[0100] In some embodiments, the first recess 201 and the second recess 202 may be formed by the first battery cell being recessed from one side in the first direction X to the other side.

[0101] The two edge areas of the second wall 222 in the second direction Y are respectively recessed to form a first recess 201 and a second recess 202. At least a portion of the second electrode terminal 240 of the second battery cell 22 is accommodated in the first recess 201 of the first battery cell 21, and at least a portion of the first electrode terminal 230 of the second battery cell 22 is accommodated in the second recess 202 of the first battery cell 21. This can reduce the distance between the second battery cell 22 and the first battery cell 21 or even make them fit closely together, thereby making the arrangement of multiple battery cells 20 in the battery more compact, which is beneficial to improving the energy density of the battery.

[0102] In some embodiments, the housing 220 includes a third wall 223 and a fourth wall 224 that are disposed opposite to each other along the second direction Y, and the pressure relief mechanism 210 is disposed on the third wall 223 and / or the fourth wall 224 .

[0103] In some embodiments, along the second direction Y, the projection of the pressure relief mechanism 210 disposed on the first battery cell 21 does not overlap with the projection of the busbar 30 .

[0104] By ensuring that the projection of the pressure relief mechanism 210 arranged on the first battery cell 21 does not overlap with the projection of the busbar 30 along the second direction Y, it can be ensured that when the pressure relief mechanism 210 is opened, substances such as electrolyte and metal particles sprayed along the second direction Y are not easily splashed on the busbar 30, thereby reducing the risk of corrosion of the busbar 30 and reducing the risk of short circuit, thermal runaway, etc. caused by insulation failure of the insulating layer arranged on the busbar 30.

[0105] In some embodiments, along the second direction Y, the pressure relief mechanism 210 protrudes from the busbar 30 .

[0106] By making the pressure relief mechanism 210 protrude from the busbar 30 along the second direction Y, it can be further ensured that when the pressure relief mechanism 210 is opened, substances such as electrolyte and metal particles sprayed along the second direction Y are not easily splashed on the busbar 30 when they are sputtered circumferentially, thereby reducing the risk of corrosion of the busbar 30 and reducing the risk of short circuit, thermal runaway, etc. caused by insulation failure of the insulating layer provided on the busbar 30.

[0107] In some embodiments, the first battery cell 21 is provided with a first notch 203 , and the first notch 203 penetrates the first battery cell 21 along the first direction X. At least a portion of the busbar 30 is accommodated in the first notch 203 .

[0108] The first battery cell 21 is provided with a first notch 203, and the first notch 203 penetrates the first battery cell 21 along the first direction X. At least a portion of the busbar 30 is accommodated in the first notch 203, so that the busbar 30 can pass through the first battery cell 21 to connect the first electrode terminal 230 of the first battery cell 21 and the second electrode terminal 240 of the second battery cell 22, and can reduce the size of the portion of the busbar 30 protruding from the outer surface of the first battery cell 21, thereby reducing the possibility of deformation or damage of the busbar 30 when the battery is subjected to force, thereby reducing the possibility of short circuit, open circuit or even thermal runaway of multiple battery cells 20.

[0109] In some embodiments, a cross section of the notch 201 on a plane perpendicular to the first direction X may be rectangular.

[0110] In some other embodiments, the cross-section of the notch 201 on a plane perpendicular to the first direction X may also be a square or a triangle.

[0111] The cross section of the notch 201 on a plane perpendicular to the first direction X is rectangular, square or triangular, which can facilitate the preparation of the notch 201 and the installation of the busbar 30 in the notch 201 .

[0112] In some embodiments, the first recess 201 is connected to the first notch 203 .

[0113] By connecting the first recess 201 with the first notch 203, it is possible to facilitate the connection between the busbar 30 at least partially accommodated in the first notch 203 and the second electrode terminal 240 of the second battery cell 22 at least partially accommodated in the first recess 201, and the preparation of the first recess 201 and the first notch 203 is facilitated, which can improve the preparation efficiency of the battery.

[0114] In some embodiments, the first notch 203 is recessed from one side to the other side of the first battery cell 21 in the third direction Z. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other.

[0115] By making the first notch 203 recessed from one side of the first battery cell 21 in the third direction Z to the other side, the first battery cell 21 can be easily prepared and formed, and at least a portion of the busbar 30 can be easily disposed in the first notch 203 .

[0116] In some embodiments, along the second direction Y, the busbar 30 does not extend beyond the outer surface of the first battery cell 21 . Along the third direction Z, the busbar 30 does not extend beyond the outer surface of the first battery cell 21 .

[0117] By ensuring that the busbar 30 does not extend beyond the outer surface of the first battery cell 21 along the second direction Y, and does not extend beyond the outer surface of the first battery cell 21 along the third direction Z, it is possible that when the first battery cell 21 is acted upon by external force in the second direction Y and the third direction Z, the external force is not easily applied directly to the busbar 30, thereby reducing the possibility of deformation or damage of the busbar 30 causing short circuit, open circuit or even thermal runaway of multiple battery cells 20.

[0118] In some embodiments, the current busbar 30 bypasses a side of the first battery cell 21 facing away from the bottom wall 111 .

[0119] By making the busbar 30 bypass the side of the first battery cell 21 facing away from the bottom wall 111 , the busbar 30 can be installed after the battery cell 20 is installed in the box body 10 , thereby simplifying the assembly difficulty of the battery 100 and improving the assembly efficiency of the battery 100 .

[0120] In some embodiments, along the second direction Y, the first notch 203 of the first battery cell 21 is disposed on a side of the first battery cell 21 away from the bottom wall 111 , and the first notch 203 of the second battery cell 22 is disposed on a side of the second battery cell 22 close to the bottom wall 111 .

[0121] By making the first notch 203 of the first battery cell 21 be arranged on the side of the first battery cell 21 away from the bottom wall 111 along the second direction Y, and the first notch 203 of the second battery cell 22 be arranged on the side of the second battery cell 22 close to the bottom wall 111, each battery cell 20 only needs to be provided with one notch 201, which can simplify the preparation process of the battery cell 20, reduce the preparation cost of the battery cell 20, and improve the preparation efficiency of the battery cell 20.

[0122] Please refer to Figures 4 to 7 , Figure 6 This is a schematic diagram of the three-dimensional structure of a second battery cell of a battery provided in some embodiments of the present application. Figure 7 A schematic diagram of the three-dimensional structure of a busbar of a battery provided in some embodiments of the present application.

[0123] In some embodiments, the busbar 30 includes a busbar portion 310, a first connecting portion 320 and a second connecting portion 330, the first connecting portion 320 is connected to the first electrode terminal 230 of the first battery cell 21, the second connecting portion 330 is connected to the second electrode terminal 240 of the second battery cell 22, the busbar portion 310 connects the first connecting portion 320 and the second connecting portion 330, and at least a portion of the busbar portion 310 is accommodated in the first notch 203.

[0124] The busbar 30 includes a busbar portion 310, a first connecting portion 320 and a second connecting portion 330. The first connecting portion 320 is connected to the first electrode terminal 230 of the first battery cell 21, and the second connecting portion 330 is connected to the second electrode terminal 240 of the second battery cell 22. The busbar portion 310 connects the first connecting portion 320 and the second connecting portion 330, so as to realize the electrical connection between the first electrode terminal 230 of the first battery cell 21 and the second electrode terminal of the second battery cell 22. At least a portion of the busbar portion 310 is accommodated in the first notch 203, so as to reduce the size of the portion of the busbar portion 310 protruding from the outer surface of the first battery cell 21, thereby reducing the possibility of deformation or damage of the busbar portion 310 when the battery is subjected to force, thereby reducing the possibility of short circuit, open circuit or even thermal runaway of multiple battery cells 20.

[0125] In some embodiments, the first electrode terminal 230 includes a first end surface 231 and a first side surface 232, the first end surface 231 is perpendicular to the first direction X, the first side surface 232 is perpendicular to the second direction Y, at least a portion of the first connection portion 320 is connected to the first end surface 231, and at least a portion of the first connection portion 320 is connected to the first side surface 232.

[0126] The first electrode terminal 230 includes a first end face 231 and a first side face 232, the first end face 231 is perpendicular to the first direction X, the first side face 232 is perpendicular to the second direction Y, at least a portion of the first connection portion 320 is connected to the first end face 231, and at least a portion of the first connection portion 320 is connected to the first side face 232, which can facilitate the connection between the first connection portion 320 and the first electrode terminal 230, and the connection area is large, and the connection reliability is high.

[0127] In some embodiments, the second electrode terminal 240 includes a second end surface 241 and a second side surface 242, the second end surface 241 is perpendicular to the first direction X, the second side surface 242 is perpendicular to the second direction Y, at least a portion of the second connection portion 330 is connected to the second end surface 241, and at least a portion of the second connection portion 330 is connected to the second side surface 242.

[0128] The second electrode terminal 240 includes a second end face 241 and a second side face 242, the second end face 241 is perpendicular to the first direction X, the second side face 242 is perpendicular to the second direction Y, at least a portion of the second connection portion 330 is connected to the second end face 241, and at least a portion of the second connection portion 330 is connected to the second side face 242, which can facilitate the connection between the second connection portion 330 and the second electrode terminal 240, and the connection area is large, and the connection reliability is high.

[0129] Please refer to Figure 8 and Fig. 9 , Figure 8 A three-dimensional schematic diagram of a partial structure of a battery provided in some other embodiments of the present application, Fig. 9 An exploded schematic diagram of a partial structure of a battery provided in some other embodiments of the present application.

[0130] In some other embodiments, the first electrode terminal 230 includes a third side surface 233 , the third side surface 233 is inclined relative to the first direction X, and at least a portion of the first connection portion 320 is connected to the third side surface 233 .

[0131] The first electrode terminal 230 includes a third side surface 233, and the third side surface 233 is inclined relative to the first direction X. At least a portion of the first connection portion 320 is connected to the third side surface 233, which can increase the connection area between the first electrode terminal 230 and the first connection portion 320, thereby improving the connection reliability between the first electrode terminal 230 and the first connection portion 320, and can set the dimensions of the first electrode terminal 230 and the first connection portion 320 along the first direction X to be smaller, so that the space occupied by the busbar 30 is smaller, which is beneficial to improving the energy density of the battery.

[0132] In some embodiments, the second electrode terminal 240 includes a fourth side surface 243 , the fourth side surface 243 is inclined relative to the first direction X, and at least a portion of the second connection portion 330 is connected to the fourth side surface 243 .

[0133] The second electrode terminal 240 includes a fourth side surface 243, and the fourth side surface 243 is inclined relative to the first direction X. At least a portion of the second connection portion 330 is connected to the fourth side surface 243, which can increase the connection area between the second electrode terminal 240 and the second connection portion 330, thereby improving the connection reliability between the second electrode terminal 240 and the second connection portion 330, and can set the size of the second electrode terminal 240 and the second connection portion 330 along the first direction X to be smaller, so that the space occupied by the busbar 30 is smaller, which is beneficial to improving the energy density of the battery.

[0134] Please refer to Fig.10 , Fig.10 A schematic structural diagram of a first battery cell of a battery provided in some other embodiments of the present application from one perspective.

[0135] In some other embodiments, two ends of the first battery cell 21 along the third direction Z are each provided with a first notch 203 , and the current collector 30 is disposed in one of the two first notches 203 away from the bottom wall 111 .

[0136] If the battery cell 20 is provided with only one first notch 203, the current collector (not shown in the figure) provided in the first notch 203 of the second battery cell 22 is located on the side of the second battery cell 22 facing the bottom wall 111. By providing a first notch 203 at each end of the first battery cell 21 along the third direction Z, that is, each battery cell 20 can be provided with two first notches 203, the current collector 30 between any two adjacent battery cells 20 can be provided at one of the two first notches 203 away from the bottom wall 111, and the current collector 30 can be installed after the battery cell 20 is installed in the box 10, thereby simplifying the assembly difficulty of the battery 100 and improving the assembly efficiency of the battery 100.

[0137] In some embodiments, the structures of the plurality of battery cells 20 are the same, and one of two adjacent battery cells 20 is rotated 180° relative to the other.

[0138] The structures of multiple battery cells 20 are the same, which can simplify the battery manufacturing process, reduce the battery manufacturing cost, and improve the battery manufacturing efficiency; one of the two adjacent battery cells 20 is rotated 180° relative to the other, so that the electrode terminals of the two adjacent battery cells 20 with opposite polarities can correspond and be connected to realize the series connection of multiple battery cells 20.

[0139] Please refer to Fig.11 , Fig.11 A schematic structural diagram of a first battery cell of a battery provided in some other embodiments of the present application from one perspective.

[0140] In other embodiments, along the second direction Y, two second notches 204 are provided at one end of the first battery cell 21 opposite to the first notch 203, and the two second notches 204 are respectively located at the two ends of the first battery cell 21 along the third direction Z; the busbar 30 is provided at one of the two second notches 204 away from the bottom wall 111.

[0141] Along the second direction Y, two second notches 204 are provided at one end of the first battery cell 21 opposite to the first notch 203, and the two second notches 204 are respectively located at the two ends of the first battery cell 21 along the third direction Z, so that when multiple battery cells 20 of the same structure are stacked, no matter one of the two adjacent battery cells 20 is rotated 180° relative to the other or not rotated, the battery cell 20 can have a first notch 203 or a second notch 204 on the side away from the bottom wall 111 at both ends along the second direction Y, so that the busbar 30 can be set in the first notch 203 or the second notch 204 away from the bottom wall 111; by setting the busbar 30 in one of the two second notches 204 away from the bottom wall 111, the busbar 30 can be installed after the battery cell 20 is loaded into the box body 10, thereby simplifying the difficulty of battery assembly and improving battery assembly efficiency.

[0142] Please refer to Figure 4 In some embodiments, the housing 220 includes a shell 225 and a cover plate 226 , the shell 225 is provided with an opening, the cover plate 226 closes the opening, and the cover plate 226 is the first wall 221 .

[0143] In some embodiments, the shell 225 and the cover plate 226 are welded or bonded, so that the connection between the shell 225 and the cover plate 226 is stable and the connection reliability is high.

[0144] In some embodiments, the outer surface of the first wall 221 is the outer surface with the largest area of ​​the housing 220, so that the arrangement of the multiple battery cells 20 is more compact and the energy density of the battery 100 is higher.

[0145] In a second aspect, an embodiment of the present application provides an electrical device, including a battery 100 provided in any of the above embodiments, and the battery 100 is used to provide electrical energy.

[0146] The electrical equipment may be any of the aforementioned systems or equipment using the battery 100 .

[0147] Please refer to Figures 3 to 7 The embodiment of the present application provides a battery 100, which includes a box body 10 and a plurality of battery cells 20, wherein the plurality of battery cells 20 are stacked along a first direction X. The box body 10 is used to accommodate the plurality of battery cells 20, and the box body 10 includes a bottom wall 111 and two first side walls 112 arranged opposite to each other along a second direction Y, wherein the bottom wall 111 is used to support the plurality of battery cells 20, and the first side walls 112 are connected to the bottom wall 111, and the second direction Y is perpendicular to the first direction X. Each battery cell 20 includes a pressure relief mechanism 210, and the pressure relief mechanism 210 is arranged at one end of the battery cell 20 in the second direction Y.

[0148] Each battery cell 20 includes a housing 220 , a first electrode terminal 230 and a second electrode terminal 240 . The housing 220 includes a first wall 221 and a second wall 222 oppositely disposed along a first direction X. The first electrode terminal 230 and the second electrode terminal 240 are protruded from the first wall 221 .

[0149] Along the second direction Y, the projection of the pressure relief mechanism 210 disposed on the first battery cell 21 does not overlap with the projection of the busbar 30. Along the second direction Y, the pressure relief mechanism 210 protrudes from the busbar 30. The plurality of battery cells 20 include adjacent first battery cells 21 and second battery cells 22, and the battery further includes a busbar 30, which connects the first electrode terminal 230 of the first battery cell 21 and the second electrode terminal 240 of the second battery cell 22. The two edge regions of the second wall 222 in the second direction Y are respectively recessed to form a first recess 201 and a second recess 202, the second electrode terminal 240 of the second battery cell 22 is accommodated in the first recess 201 of the first battery cell 21, and the first electrode terminal 230 of the second battery cell 22 is accommodated in the second recess 202 of the first battery cell 21.

[0150] The first battery cell 21 is provided with a first notch 203 , which penetrates the first battery cell 21 along the first direction X, and a portion of the busbar 30 is accommodated in the first notch 203 . The first recess 201 is in communication with the first notch 203 .

[0151] In the second direction Y, the busbar 30 does not extend beyond the outer surface of the first battery cell 21 . In the third direction Z, the busbar 30 does not extend beyond the outer surface of the first battery cell 21 .

[0152] The plurality of battery cells 20 have the same structure, and one of two adjacent battery cells 20 is arranged to be rotated 180 degrees relative to the other.

[0153] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0154] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery, characterized in that: include: A plurality of battery cells, wherein the plurality of battery cells are stacked along a first direction; A box body, used to accommodate the plurality of battery cells, the box body comprising a bottom wall and two first side walls arranged opposite to each other along a second direction, the bottom wall being used to support the plurality of battery cells, the first side walls being connected to the bottom wall, and the second direction being perpendicular to the first direction; Wherein, at least one of the battery cells comprises a pressure relief mechanism, and the pressure relief mechanism is arranged at at least one end of the battery cell in the second direction.

2. The battery according to claim 1, characterized in that Each of the battery cells comprises a housing, a first electrode terminal and a second electrode terminal, the housing comprises a first wall and a second wall arranged opposite to each other along the first direction, the first electrode terminal and the second electrode terminal are protrudingly arranged on the first wall, and the plurality of battery cells comprises adjacent first battery cells and second battery cells; The battery further includes a busbar connecting a first electrode terminal of the first battery cell and the second electrode terminal of the second battery cell; Among them, the two edge areas of the second wall in the second direction are respectively recessed to form a first recess and a second recess, at least a portion of the second electrode terminal of the second battery cell is accommodated in the first recess of the first battery cell, and at least a portion of the first electrode terminal of the second battery cell is accommodated in the second recess of the first battery cell.

3. The battery according to claim 2, characterized in that Along the second direction, a projection of the pressure relief mechanism disposed on the first battery cell does not overlap with a projection of the current busbar.

4. The battery according to claim 3, characterized in that Along the second direction, the pressure relief mechanism protrudes from the busbar.

5. The battery according to claim 2, characterized in that The first battery cell is provided with a first notch, the first notch penetrates the first battery cell along the first direction, and at least a portion of the current collector is accommodated in the first notch.

6. The battery according to claim 5, characterized in that The first recess is communicated with the first notch.

7. The battery according to claim 5, characterized in that The first notch is recessed from one side to the other side of the first battery cell in a third direction; the first direction, the second direction, and the third direction are perpendicular to each other.

8. The battery according to claim 5, characterized in that Along the second direction, the busbar does not extend beyond the outer surface of the first battery cell; along the third direction, the busbar does not extend beyond the outer surface of the first battery cell; the first direction, the second direction, and the third direction are perpendicular to each other.

9. The battery according to claim 5, characterized in that The busbar includes a busbar portion, a first connecting portion and a second connecting portion, the first connecting portion being connected to the first electrode terminal of the first battery cell, the second connecting portion being connected to the second electrode terminal of the second battery cell, the busbar portion connecting the first connecting portion and the second connecting portion, and at least a portion of the busbar portion being accommodated in the first notch.

10. The battery according to claim 9, characterized in that The first electrode terminal includes a first end surface and a first side surface, the first end surface is perpendicular to the first direction, the first side surface is perpendicular to the second direction, at least a portion of the first connecting portion is connected to the first end surface, and at least a portion of the first connecting portion is connected to the first side surface; The second electrode terminal includes a second end surface and a second side surface, the second end surface is perpendicular to the first direction, the second side surface is perpendicular to the second direction, at least a portion of the second connection portion is connected to the second end surface, and at least a portion of the second connection portion is connected to the second side surface.

11. The battery according to claim 9, characterized in that The first electrode terminal includes a third side surface, the third side surface is inclined relative to the first direction, and at least a portion of the first connecting portion is connected to the third side surface; The second electrode terminal includes a fourth side surface, the fourth side surface is inclined relative to the first direction, and at least a portion of the second connection portion is connected to the fourth side surface.

12. The battery according to claim 5, characterized in that The first battery cell is provided with a first notch at each of two ends along the third direction, and the current collector is provided at one of the two first notches away from the bottom wall; The first direction, the second direction, and the third direction are perpendicular to each other.

13. The battery according to claim 12, characterized in that The battery cells have the same structure, and one of two adjacent battery cells is rotated 180 degrees relative to the other.

14. The battery according to claim 5, characterized in that Along the second direction, the first battery cell is provided with two second notches at one end opposite to the first notch, and the two second notches are respectively located at two ends of the first battery cell along the third direction; the current collector is provided at one of the two second notches away from the bottom wall; The first direction, the second direction, and the third direction are perpendicular to each other.

15. The battery according to claim 2, characterized in that The housing includes a shell and a cover plate, the shell is provided with an opening, the cover plate closes the opening, and the cover plate is the first wall.

16. An electrical equipment, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 15, wherein the battery is used to provide electrical energy.

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