Battery and electric equipment

Abstract

The utility model provides a battery and electric equipment, the battery comprises a box body, first battery monomers and second battery monomers, the first battery monomers are arranged along a first direction to form a first battery monomer group, and each first battery monomer comprises a first straight part and first bent parts located at two opposite ends in a second direction; in the first direction, a first gap is formed between every two adjacent first bending parts; in the second direction, a part of the second battery cell is arranged in the first gap; according to the battery provided by the embodiment of the invention, in the second direction, the second battery monomers and the first battery monomer group are closely arranged, and the size of the box body in the second direction can be reduced.

Description

Technical Field

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

[0002] Batteries are widely used in the field of new energy, such as electric vehicles and new energy vehicles. New energy vehicles and electric vehicles have become a new development trend in the automotive industry. Batteries include a box body and battery cells and other components contained in the box body. The arrangement of battery cells has a great influence on the volume of the box body; therefore, how to arrange battery cells more closely to reduce the size of the box body is a technical problem that needs to be solved in battery technology. Utility Model Content

[0003] The purpose of the embodiments of the present application is to provide a battery and an electrical device, which can reduce the size of the box by closely arranging the battery cells.

[0004] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is:

[0005] In the first aspect, an embodiment of the present application provides a battery, comprising a box body, a first battery cell and a second battery cell, wherein a accommodating cavity is formed inside the box body; a plurality of first battery cells are arranged in sequence along a first direction to form a first battery cell group, the first battery cell comprises a first straight portion and a first bent portion connected to at least one end of the first straight portion along a second direction, and the first direction is perpendicular to the second direction; in the first direction, a first gap is formed between the first bent portions of two adjacent first battery cells; in the second direction, the second battery cell is arranged on at least one side of the first battery cell group, and a portion of the second battery cell is arranged in the first gap.

[0006] Beneficial effects of the embodiments of the present application: In the battery provided by the embodiments of the present application, the first battery cells can be arranged in sequence along the first direction to form a first battery cell group, and a first gap is formed between the first bending portions of two adjacent first battery cells in the first direction, so that a portion of the second battery cell located on at least one side of the first battery cell group in the second direction can be arranged in the first gap; thereby, in the second direction, the second battery cells are arranged more closely with the first battery cell group, and the arrangement space occupied by the second battery cells and the first battery cell group is effectively reduced, so the size of the box in the second direction can also be reduced accordingly.

[0007] In some embodiments, a plurality of second battery cells are arranged in sequence along a first direction to form a second battery cell group. In a second direction, the first battery cell group and the second battery cell group are arranged in sequence, and at least some of the second battery cells in the second battery cell group are disposed in corresponding first gaps.

[0008] By adopting the above technical solution, a plurality of second battery monomers can be arranged in the first direction to form a second battery monomer group, and the second battery monomer group and the first battery monomer group are arranged in the second direction. Thus, when at least some of the second battery monomers in the second battery monomer group are disposed in the corresponding first gaps, the first battery monomer group and the second battery monomer group are more compactly arranged in the second direction, and the arrangement space occupied by the first battery monomer group and the second battery monomer group in the second direction can be effectively reduced. Therefore, the size of the box body in the second direction can also be correspondingly reduced.

[0009] In some embodiments, the second battery monomer is a cylindrical battery monomer.

[0010] By adopting the above technical solution, a part of the cylindrical battery monomer in the second direction can be disposed in the first gap; at the same time, after a plurality of cylindrical battery monomers are arranged in the first direction to form a second battery monomer group, gaps can also be formed between adjacent cylindrical battery monomers. Thus, a part of the first bending portion in the second direction can also be disposed in the gaps between the cylindrical battery monomers, and further, the size of the box body in the second direction can be reduced.

[0011] In some embodiments, the second battery monomer includes a second straight portion and a second bending portion connected to at least one end of the second straight portion in the second direction. At least a part of the second bending portion is disposed in the first gap; in the first direction, a second gap is formed between two adjacent second bending portions; at least a part of the first bending portion is disposed in the second gap formed between adjacent second battery monomer groups.

[0012] By adopting the above technical solution, at least a part of the second bending portion can be disposed in the first gap, and at the same time, at least a part of the first bending portion can be disposed in the second gap. Thus, the arrangement compactness of the first battery monomer group and the second battery monomer group in the second direction can be further improved, so that the arrangement space occupied by the first battery monomer group and the second battery monomer group in the second direction can be further reduced, and further, the size of the box body in the second direction can be further reduced.

[0013] In some embodiments, in the first direction, at least two adjacent first straight portions are in contact with each other; and / or, in the first direction, at least two adjacent second straight portions are in contact with each other.

[0014] By adopting the above technical solution, by arranging at least two adjacent first flat portions to be in contact with each other in the first direction, and / or by arranging at least two adjacent second flat portions to be in contact with each other in the first direction, thus, the first battery cell group and / or the second battery cell group are more compact in the first direction, so as to effectively reduce the space occupied by the first battery cell group and / or the second battery cell group in the first direction, and further reduce the size of the box body in the first direction.

[0015] In some embodiments, in the first direction, at least two adjacent first flat portions are spaced apart; and / or, in the first direction, at least two adjacent second flat portions are spaced apart.

[0016] By adopting the above technical solution, by arranging at least two adjacent first flat portions to be spaced apart in the first direction, thus, a buffer structure and / or a liquid cooling structure can be arranged between the two spaced first flat portions to balance the expansion force formed by the first battery cell group and to be able to perform water cooling on the first battery cell; and / or, by arranging at least two adjacent second flat portions to be spaced apart in the first direction, thus, a buffer structure and / or a liquid cooling structure can be arranged between the two spaced second flat portions to balance the expansion force formed by the second battery cell group and to be able to perform water cooling on the second battery cell.

[0017] In some embodiments, the battery further includes a buffer structure, and a buffer structure is arranged between two adjacent first flat portions that are spaced apart in the first direction; and / or, a buffer structure is arranged between two adjacent second flat portions that are spaced apart in the first direction.

[0018] By adopting the above technical solution, by arranging a buffer structure between two adjacent first flat portions that are spaced apart and / or between two adjacent second flat portions that are spaced apart, the influence of the expansion force of the first battery cell and / or the second battery cell in the first direction can be effectively reduced.

[0019] In some embodiments, the second bent portion abuts against at least one first bent portion at the same first gap.

[0020] By adopting the above technical solution, the second bent portion is arranged to abut against at least one first bent portion at the same first gap. Thus, the first bent portion and the second bent portion are arranged more closely in the second direction to further reduce the space occupied by the first battery cell group and the second battery cell group in the second direction, thereby further reducing the size of the box body in the second direction.

[0021] In some embodiments, the second bent portion is spaced apart from at least one first bent portion at the same first gap.

[0022] By adopting the above technical solution, a structure for realizing cooling can be arranged between the second bending part and at least one first bending part at the same first gap, so as to improve the cooling effect on the first battery cell and the second battery cell.

[0023] In some embodiments, the second battery cell abuts against at least one first bending part at the same first gap.

[0024] By adopting the above technical solution, the second battery cell is arranged to abut against at least one first bending part at the same first gap. Thus, the first bending part and the second battery cell are arranged more closely in the second direction, so as to further reduce the space occupied by the first battery cell group and the second battery cell in the second direction, and thus further reduce the size of the box body in the second direction.

[0025] In some embodiments, the second battery cell is spaced from at least one first bending part at the same first gap.

[0026] By adopting the above technical solution, a structure for realizing cooling can be arranged between the second battery cell and at least one first bending part at the same first gap, so as to improve the cooling effect on the first battery cell and the second battery cell.

[0027] In some embodiments, in the first direction, two adjacent first straight parts are spaced apart, and two adjacent second straight parts are spaced apart; the second bending part is spaced from one of the two first bending parts at the same first gap, and the second bending part abuts against the other of the two first bending parts at the same first gap.

[0028] By adopting the above technical solution, the intervals between two adjacent first straight parts and between two adjacent second straight parts can be communicated through the intervals between the first bending part and the second bending part, so as to facilitate the arrangement operation of the structure for realizing cooling and the structure for realizing buffering.

[0029] In some embodiments, in the first direction, the battery further includes a liquid cooling structure, and the liquid cooling structure is arranged between two adjacent spaced-apart first straight parts, between two adjacent spaced-apart first bending parts and the second bending part, and between two adjacent spaced-apart second straight parts.

[0030] By adopting the above technical solution, the liquid cooling structure can be in contact with the first straight part and the second straight part, so that the cooling effect of the liquid cooling structure on the first battery cell and the second battery cell is better.

[0031] In some embodiments, a third gap is formed between one side of the first battery cell group in the first direction and the inner wall surface of the box body; and / or, a fourth gap is formed between the other side of the second battery cell group in the first direction and the inner wall surface of the box body.

[0032] By adopting the above technical solution, the third gap and / or the fourth gap can be used to arrange other structures to improve the space utilization rate in the accommodation cavity.

[0033] In some embodiments, the battery further includes at least one of a temperature sensor, an internal pressure sensor, and a pressure sensor, and the temperature sensor, the internal pressure sensor, and the pressure sensor are arranged in the third gap and / or the fourth gap.

[0034] By adopting the above technical solution, by arranging at least one of the temperature sensor, the internal pressure sensor, and the pressure sensor in the third gap and / or the fourth gap, the space in the accommodation cavity can be more reasonably utilized to improve the space utilization rate in the accommodation cavity.

[0035] In some embodiments, a pressure relief mechanism is further arranged on the box body, and the pressure relief mechanism is located at the third gap and / or the fourth gap.

[0036] By adopting the above technical solution, the pressure relief mechanism can also be arranged on the box body and located at the third gap and / or the fourth gap, so as to realize directional pressure relief at the third gap and / or the fourth gap.

[0037] In some embodiments, two adjacent first battery cells are connected by a first electrical connection structure, two adjacent second battery cells are connected by a second electrical connection structure, and a first battery cell and an adjacent second battery cell are connected by a third electrical connection structure.

[0038] By adopting the above technical solution, the first electrical connection structure is used to connect the first battery cells in the first battery cell group, the second electrical connection structure is used to connect the second battery cells in the second battery cell group, and the third electrical connection structure is used to connect the first battery cell and the adjacent second battery cell.

[0039] In a second aspect, an embodiment of the present application further provides an electrical device, including the battery as described above, and the battery is used to provide electrical energy.

[0040] The beneficial effects of the embodiments of the present application: The electrical device provided by the embodiments of the present application includes the above battery. On the basis that the size of the above battery is reduced, the reserved space for the electrical device to accommodate the battery is also effectively reduced. Description of the Drawings

[0041] To more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0042] Figure 1 Structural schematic diagram of a vehicle provided by some embodiments of the present application;

[0043] Figure 2 Explosion diagram of a battery provided by some embodiments of the present application;

[0044] Figure 3 Exploded structural schematic diagram of a battery cell provided by some embodiments of the present application;

[0045] Figure 4 Arrangement structural schematic diagram of a first battery cell group and a second battery cell group along a second direction provided by an embodiment of the present application;

[0046] Figure 5 First arrangement structural schematic diagram of a first battery cell and a second battery cell provided by an embodiment of the present application;

[0047] Figure 6 Second arrangement structural schematic diagram of a first battery cell and a second battery cell provided by an embodiment of the present application;

[0048] Figure 7 Third arrangement structural schematic diagram of a first battery cell and a second battery cell provided by an embodiment of the present application;

[0049] Figure 8 Fourth arrangement structural schematic diagram of a first battery cell and a second battery cell provided by an embodiment of the present application;

[0050] Figure 9 Structural schematic diagram of a first battery cell group and a second battery cell group arranged in a box provided by an embodiment of the present application;

[0051] Figure 10 Electrical connection structural schematic diagram of a first battery cell and a second battery cell provided by an embodiment of the present application;

[0052] Figure 11 Arrangement structural schematic diagram when the second battery cell is a cylindrical battery cell provided by an embodiment of the present application.

[0053] Among them, the reference numerals in the figures:

[0054] 1000, vehicle;

[0055] 100. Battery; 200. Controller; 300. Motor;

[0056] 10. Box body; 101. Accommodating cavity; 11. First part; 12. Second part;

[0057] 20. Battery cell; 21. End cover; 21a. Electrode terminal; 22. Housing; 23. Electrode assembly; 23a. Tab;

[0058] 30. First battery cell; 301. First battery cell group; 31. First straight part; 32. First bent part; 33. First gap;

[0059] 40. Second battery cell; 401. Second battery cell group; 41. Second straight part; 42. Second bent part; 43. Second gap;

[0060] 50. Buffer structure; 60. Liquid cooling structure; 70. Third gap; 80. Fourth gap;

[0061] 91. First electrical connection structure; 92. Second electrical connection structure; 93. Third electrical connection structure;

[0062] X. First direction; Y. Second direction. Detailed implementation manners

[0063] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, but should not be construed as limiting the present application.

[0064] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application.

[0065] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0066] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between 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.

[0067] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0068] Batteries are widely used in the field of new energy, such as electric vehicles and new energy vehicles. New energy vehicles and electric vehicles have become a new development trend in the automotive industry. Batteries include a box body and battery cells and other components contained in the box body. The arrangement of battery cells has a great influence on the volume of the box body; therefore, how to arrange battery cells more closely to reduce the size of the box body is a technical problem that needs to be solved in battery technology.

[0069] Based on the above considerations, in order to solve the problem that the arrangement of battery cells has a significant impact on the volume of the box, a battery is designed. By arranging the first battery cells in sequence along the first direction to form a first battery cell group, a gap will be formed between the first bending portions of adjacent first battery cells. As a result, a portion of the second battery cell located on at least one side of the first battery cell group in the second direction can be arranged in the first gap, so that the second battery cell and the first battery cell group are arranged more closely, and the arrangement space occupied by the second battery cell and the first battery cell group is effectively reduced, so that the size of the box in the second direction can also be reduced accordingly.

[0070] The battery disclosed in the embodiments of the present application can be used in electrical equipment that uses the battery as a power source or various energy storage systems that use the battery as an energy storage element. Electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, for example, game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0071] For the convenience of description, the following embodiments will take a vehicle 1000, which is an electrical device in an embodiment of the present application, as an example for illustration.

[0072] Please refer to Figure 1 , Figure 1 , which is a schematic structural diagram of the vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is disposed inside the vehicle 1000. The battery 100 can be disposed at the bottom, the head or the tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000. For example, the battery 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300. For example, it is used for the working power requirements during the start, navigation and driving of the vehicle 1000.

[0073] In some embodiments of the present application, the battery 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0074] Please refer to Figure 2 , Figure 2 , which is an exploded view of the battery 100 provided by some embodiments of the present application. The battery 100 includes a box body 10 and battery cells 20. The battery cells 20 are accommodated in the box body 10. Among them, the box body 10 is used to provide an accommodation space for the battery cells 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first part 11 and a second part 12. The first part 11 and the second part 12 are covered with each other, and the first part 11 and the second part 12 jointly define an accommodation space for accommodating the battery cells 20. The second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate-like structure. The first part 11 is covered on the opening side of the second part 12 so that the first part 11 and the second part 12 jointly define an accommodation space; the first part 11 and the second part 12 can also be hollow structures with one side open, and the opening side of the first part 11 is covered on the opening side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 can be of various shapes, such as a cylinder, a cuboid, etc.

[0075] In the battery 100, there can be multiple battery cells 20. The multiple battery cells 20 can be connected in series, parallel, or in a combined series-parallel connection. A combined series-parallel connection means that among the multiple battery cells 20, there are both series and parallel connections. The multiple battery cells 20 can be directly connected in series, parallel, or in a combined series-parallel connection together, and then the whole formed by the multiple battery cells 20 is accommodated in the box 10. Of course, the battery 100 can also be such that multiple battery cells 20 are first connected in series, parallel, or in a combined series-parallel connection to form a battery module, and then multiple battery modules are connected in series, parallel, or in a combined series-parallel connection to form a whole and are accommodated in the box 10. The battery 100 can also include other structures. For example, the battery 100 can also include a busbar component for realizing the electrical connection between the multiple battery cells 20.

[0076] Among them, each battery cell 20 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 20 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0077] Please refer to Figure 3 , Figure 3 , which is a schematic exploded view of the battery cell 20 provided in some embodiments of the present application. The battery cell 20 refers to the smallest unit that makes up the battery 100. As Figure 3 , the battery cell 20 includes a housing (including an end cap 21 and a casing 22), an electrode assembly 23, and other functional components.

[0078] The end cap 21 refers to a component that covers the opening of the casing 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the casing 22 to cooperate with the casing 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy). In this way, the end cap 21 is not easily deformed when subjected to extrusion and collision, enabling the battery cell 20 to have higher structural strength and improved reliability. Functional components such as an electrode terminal 21a can be provided on the end cap 21. The electrode terminal 21a can be used for electrically connecting with the electrode assembly 23 to output or input the electrical energy of the battery cell 20. In some embodiments, a pressure relief mechanism for discharging the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold can also be provided on the end cap 21. The material of the end cap 21 can also be various. For example, the material of the end cap 21 can be but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member can be provided on the inner side of the end cap 21. The insulating member can be used to isolate the electrical connection components in the casing 22 from the end cap 21 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0079] The housing 22 is a component for cooperating with the end cap 21 to form the internal environment of the battery cell 20. Among them, the formed internal environment can be used to accommodate the electrode assembly 23, the electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 is covered at the opening to form the internal environment of the battery cell 20. Without limitation, the end cap 21 and the housing 22 can also be integrated. Specifically, the end cap 21 and the housing 22 can form a common connection surface before other components are put into the housing. When it is necessary to encapsulate the inside of the housing 22, the end cap 21 is then covered on the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various. For example, the housing 22 can be but is not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0080] The electrode assembly 23 is a component in the battery cell 20 where an electrochemical reaction occurs. The housing 22 can contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or laminating an anode plate and a cathode plate, and usually an isolation film is provided between the anode plate and the cathode plate. The parts of the anode plate and the cathode plate with active substances constitute the main body of the electrode assembly 23, and the parts of the anode plate and the cathode plate without active substances respectively constitute the electrode tabs 23a. The anode tab and the cathode tab can be located at one end of the main body together or at both ends of the main body respectively. During the charge and discharge process of the battery, the anode active substance and the cathode active substance react with the electrolyte, and the electrode tabs 23a are connected to the electrode terminals 21a to form a current loop.

[0081] According to some embodiments of the present application, referring to Figure 3 , Figure 4 and Figure 9 , embodiments of the present application provide a battery 100, including a box body 10, a first battery cell 30, and a second battery cell 40. An accommodation cavity 101 is formed inside the box body 10; a plurality of first battery cells 30 are arranged in sequence along a first direction X to form a first battery cell group 301. The first battery cell 30 includes a first straight portion 31 and at least one first bent portion 32 connected to at least one end of the first straight portion 31 along a second direction Y. The first direction X is perpendicular to the second direction Y; in the first direction X, a first gap 33 is formed between the first bent portions 32 of two adjacent first battery cells 30; in the second direction Y, the second battery cell 40 is disposed on at least one side of the first battery cell group 301, and a part of the second battery cell 40 is disposed in the first gap 33.

[0082] The first battery cell 30 includes a first flat portion 31 and a first bent portion 32. Understandably, the first flat portion 31 refers to the middle main body portion of the first battery cell 30 with opposite side surfaces being flat. The first bent portion 32 refers to the end side portion provided on at least one side of the flat portion in the second direction Y and having a bent shape structure. Optionally, the first bent portion 32 can be provided on one side of the first flat portion 31; or, the first bent portion 32 can be provided on both opposite sides of the first flat portion 31. Wherein, the second direction Y can be any direction. Exemplarily, the second direction Y can be but is not limited to the length direction, width direction, or height direction of the box body 10.

[0083] It should be understood that the first electrode assembly (not shown in the figure, reference can be made to the electrode assembly 23 in Figure 3 shown) inside the first battery cell 30 is a wound body formed by winding. Thus, the opposite ends of the first electrode assembly will be bent to form an arc-shaped bent structure. The first battery cell 30 is arranged to include the first flat portion 31 and the first bent portion 32. The corresponding housing portion of the first bent portion 32 having a bent shape is also bent. Thus, the housing portion and the arc-shaped bent portion of the first electrode assembly inside have a better fit, so that the force exerted by the housing portion on the first electrode assembly can be more balanced, thereby improving the stability of the first battery cell 30.

[0084] Wherein, the external shape structure of the first bent portion 32 includes but is not limited to an arc-shaped structure, a triangular structure, a polygonal structure, a triangular arc-shaped structure, etc.

[0085] A plurality of first battery cells 30 are arranged in sequence along the first direction X to form a first battery cell group 301. Wherein, the number of the first battery cells 30 can be two, three, or any number more than three. The first direction X can be any direction. Exemplarily, the first direction X can be but is not limited to the length direction, width direction, or height direction of the box body 10. Optionally, the first battery cells 30 can be arranged along the first direction X to form a row of the first battery cell group 301, or the first battery cells 30 can also be arranged along the first direction X to form two rows or more of the first battery cell group 301, and each first battery cell group 301 can be arranged in sequence along the second direction Y.

[0086] In one row of the first battery cell group 301, a first gap 33 is formed between the first bent portions 32 of two adjacent first battery cells 30. In the second direction Y, the second battery cell 40 is provided on at least one side of the first battery cell group 301, and the portion of the second battery cell 40 in the second direction Y and facing the first battery cell group 301 can be provided in the first gap 33. Thus, the arrangement compactness of the first battery cell group 301 and the second battery cell 40 in the second direction Y can be effectively improved.

[0087] Optionally, the number of the second battery cells 40 may be one or any number greater than one; the second battery cells 40 may be disposed on either side of the first battery cell group 301 in the second direction Y, or the second battery cells 40 may be disposed on both opposite sides of the first battery cell group 301 in the second direction Y. Moreover, in the first direction X, the second battery cells 40 may be arranged in only one row, or may be arranged in multiple rows.

[0088] In the battery 100 provided by the embodiment of the present application, the first battery cells 30 can be sequentially arranged along the first direction X to form the first battery cell group 301, and a first gap 33 is formed between the first bending portions 32 of two adjacent first battery cells 30 in the first direction X, so that a part of the second battery cells 40 located on at least one side of the first battery cell group 301 in the second direction Y can be disposed in the first gap 33; thus, in the second direction Y, the second battery cells 40 and the first battery cell group 301 are arranged more closely, and the arrangement space occupied by the second battery cells 40 and the first battery cell group 301 can be effectively reduced, so that the size of the box body 10 in the second direction Y can also be correspondingly reduced.

[0089] Please refer to Figure 4 and Figure 9 , in some embodiments, a plurality of second battery cells 40 are sequentially arranged along the first direction X to form a second battery cell group 401, and in the second direction Y, the first battery cell group 301 and the second battery cell group 401 are sequentially arranged, and at least some of the second battery cells 40 in the second battery cell group 401 are disposed in the corresponding first gaps 33.

[0090] A plurality of second battery cells 40 are sequentially arranged along the first direction X to form a second battery cell group 401; optionally, the number of the second battery cells 40 in the same column of the second battery cell group 401 may be two, three or any number greater than three; the second battery cells 40 may be arranged in two rows or more along the first direction X. Exemplarily, the number of the second battery cells 40 arranged along the first direction X is less than the number of the first battery cells 30 arranged along the first direction X, so that each of the second battery cells 40 in adjacent second battery cell groups 401 can be partially disposed in the corresponding first gaps 33. Or, the number of the second battery cells 40 arranged along the first direction X is greater than or equal to the number of the first battery cells 30 arranged along the first direction X, so that some of the second battery cells 40 in adjacent second battery cell groups 401 can be disposed in the corresponding first gaps 33, and the other part of the second battery cells 40 in the second battery cell group 401 are located outside the first column of battery cells 100 in the first direction X and move synchronously in the second direction Y.

[0091] Exemplarily, in some embodiments, in the second direction Y, the first battery cell group 301 and the second battery cell group 401 may be alternately arranged in sequence.

[0092] With such an arrangement, a plurality of second battery cells 40 can be arranged along the first direction X to form the second battery cell group 401, and the second battery cell group 401 and the first battery cell group 301 are arranged along the second direction Y. Thus, when at least some of the second battery cells 40 in the second battery cell group 401 are disposed in the corresponding first gaps 33, the first battery cell group 301 and the second battery cell group 401 are arranged more compactly in the second direction Y, and the arrangement space occupied by the first battery cell group 301 and the second battery cell group 401 in the second direction Y is effectively reduced. Therefore, the size of the box body 10 in the second direction Y can also be correspondingly reduced.

[0093] Please refer to Figure 2 and Figure 11 , in some embodiments, the second battery cell 40 is a cylindrical battery cell.

[0094] With such an arrangement, a part of the cylindrical battery cell in the second direction Y can be disposed in the first gap 33; at the same time, after a plurality of cylindrical battery cells are arranged along the first direction X to form the second battery cell group 401, gaps can also be formed between adjacent cylindrical battery cells. Thus, a part of the first bending portion 32 in the second direction Y can also be disposed in the gaps between the cylindrical battery cells, and further, the size of the box body 10 in the second direction Y can be reduced.

[0095] Please refer to Figure 4 and Figure 9 , in some embodiments, the second battery cell 40 includes a second straight portion 41 and a second bending portion 42 connected to at least one end of the second straight portion 41 along the second direction Y, and at least a part of the second bending portion 42 is disposed in the first gap 33; in the first direction X, a second gap 43 is formed between two adjacent second bending portions 42; at least a part of the first bending portion 32 is disposed in the second gap 43 formed between adjacent second battery cell groups 401.

[0096] The second battery cell 40 includes a second straight portion 41 and a second bending portion 42; it can be understood that the second straight portion 41 refers to the middle main body portion of the second battery cell 40 with opposite side surfaces being flat; the second bending portion 42 refers to the end side portion disposed on at least one side of the second straight portion 41 in the second direction Y and having a bent shape. Optionally, the second bending portion 42 can be disposed at one end of the second straight portion 41; or, the second bending portion 42 can be disposed at both opposite ends of the second straight portion 41.

[0097] It should be understood that the second electrode assembly (not shown in the figure, reference can be made to the electrode assembly 23 shown in Figure 3 ) inside the second battery cell 40 is a wound body formed by winding. Thus, the opposite ends of the second electrode assembly will be bent to form an arc-shaped bending structure. The second battery cell 40 is arranged to include a second straight portion 41 and a second bending portion 42. The bent external structure of the second bending portion 42 can make the housing of the second battery cell 40 have a better fit with the arc-shaped bending structure formed by the winding of the second electrode assembly inside at the second bending portion 42, so that the force exerted by the second battery cell 40 on the second electrode assembly can be more balanced, and further improve the stability of the second battery cell 40.

[0098] Among them, the external shape structure of the second bending portion 42 includes but is not limited to an arc-shaped structure, a triangular structure, a polygonal structure, a triangular arc-shaped structure, etc.

[0099] In one column of the second battery cell group 401, a second gap 43 will be formed between the second bending portions 42 of two adjacent second battery cells 40. In the second direction Y, a part of the second battery cell 40 in the second battery cell group 401 can be arranged in the first gap 33. Thus, a part of the first battery cell 30 in the first battery cell group 301 can be arranged in the second gap 43 at the same time; therefore, the arrangement compactness of the first battery cell group 301 and the second battery cell group 401 in the second direction Y can be effectively improved.

[0100] With such an arrangement, at least a part of the second bending portion 42 can be arranged in the first gap 33, and at the same time, at least a part of the first bending portion 32 can be arranged in the second gap 43. Thus, the arrangement compactness of the first battery cell group 301 and the second battery cell group 401 in the second direction Y can be further improved, thereby further reducing the arrangement space occupied by the first battery cell group 301 and the second battery cell group 401 in the second direction Y, and further reducing the size of the box body 10 in the second direction Y.

[0101] Please refer to Figure 4 , Figure 5 and Figure 9 . In some embodiments, in the first direction X, at least two adjacent first straight portions 31 are in contact with each other; and / or, in the first direction X, at least two adjacent second straight portions 41 are in contact with each other.

[0102] In the first direction X, at least two adjacent first flat portions 31 are in contact with each other; optionally, the first flat portions 31 of every two adjacent first battery cells 30 can be set to be in contact with each other; or, the first flat portions 31 of some adjacent first battery cells 30 can be set to be in contact with each other, and the first flat portions 31 of some other adjacent first battery cells 30 can be set to be spaced apart, for example, every two or more than two arbitrary first flat portions 31 are in contact with the next adjacent first flat portion 31.

[0103] In the first direction X, at least two adjacent second flat portions 41 are in contact with each other; optionally, the second flat portions 41 of every two adjacent second battery cells 40 can be set to be in contact with each other; or, the second flat portions 41 of some adjacent second battery cells 40 can be set to be in contact with each other, and the second flat portions 41 of some other adjacent second battery cells 40 can be set to be spaced apart, for example, every two or more than two arbitrary second flat portions 41 are in contact with the next adjacent second flat portion 41.

[0104] With such a setting, by setting at least two adjacent first flat portions 31 to be in contact with each other in the first direction X, and / or by setting at least two adjacent second flat portions 41 to be in contact with each other in the first direction X, thus, the first battery cell group 301 and / or the second battery cell group 401 are more compact in the first direction X, so that the space occupied by the first battery cell group 301 and / or the second battery cell group 401 in the first direction X can be effectively reduced, and further, the size of the box body 10 in the first direction X can be reduced.

[0105] Please refer to Figure 4 、 Figures 6 to 8 In some embodiments, in the first direction X, at least two adjacent first flat portions 31 are spaced apart; and / or, in the first direction X, at least two adjacent second flat portions 41 are spaced apart.

[0106] In the first direction X, at least two adjacent first flat portions 31 are spaced apart; optionally, the first flat portions 31 of every two adjacent first battery cells 30 can be set to be spaced apart; or, the first flat portions 31 of some adjacent first battery cells 30 can be set to be in contact with each other, and the first flat portions 31 of some other adjacent first battery cells 30 can be set to be spaced apart, for example, every two or more than two arbitrary first flat portions 31 are spaced apart from the next adjacent first flat portion 31.

[0107] In the first direction X, at least two adjacent second flat portions 41 are spaced apart; optionally, the second flat portions 41 of each adjacent pair of second battery cells 40 can be set to be spaced apart; or, the second flat portions 41 of some adjacent second battery cells 40 can be set to be in contact with each other, and the second flat portions 41 of another part of adjacent second battery cells 40 can be set to be spaced apart. For example, every two or more than two second flat portions 41 are spaced apart from the next adjacent second flat portion 41.

[0108] With such a setting, by setting at least two adjacent first flat portions 31 to be spaced apart in the first direction X, thus, a buffer structure and / or a liquid cooling structure can be arranged between the two spaced first flat portions 31 to balance the expansion force formed by the first battery cell group 301 and to be able to cool the first battery cell 30 by water cooling; and / or, by setting at least two adjacent second flat portions 41 to be spaced apart in the first direction X, thus, a buffer structure and / or a liquid cooling structure can be arranged between the two spaced second flat portions 41 to balance the expansion force formed by the second battery cell group 401 and to be able to cool the second battery cell 40 by water cooling.

[0109] Please refer to Figure 4 and Figure 6 , in some embodiments, the battery 100 further includes a buffer structure 50. In the first direction X, the buffer structure 50 is arranged between two adjacent first flat portions 31 that are spaced apart; and / or, in the first direction X, the buffer structure 50 is arranged between two adjacent second flat portions 41 that are spaced apart.

[0110] Among them, the buffer structure 50 includes, but is not limited to, structural members with a buffer energy absorption effect such as buffer pads, buffer coatings, and buffer blocks.

[0111] The buffer structure 50 can be arranged between two adjacent first flat portions 31 that are spaced apart in the first direction X, and / or the buffer structure 50 can be arranged between two adjacent second flat portions 41 that are spaced apart in the first direction X.

[0112] With such a setting, by arranging the buffer structure 50 between two adjacent first flat portions 31 that are spaced apart and / or between two adjacent second flat portions 41 that are spaced apart, the influence of the expansion force of the first battery cell 30 and / or the second battery cell 40 in the first direction X can be effectively reduced.

[0113] Please refer to Figures 4 to 7 , in some embodiments, the second bent portion 42 abuts against the first bent portion 32 at at least one same first gap 33.

[0114] Understandably, when at least part of the second bending portion 42 is disposed in the first gap 33, at least part of the second bending portion 42 is located between the two first bending portions 32 that form the first gap 33. Similarly, when at least part of the first bending portion 32 is disposed in the second gap 43, at least part of the first bending portion 32 is located between two adjacent second bending portions 42 that form the second gap 43.

[0115] Thus, the second bending portion 42 can abut against at least one of the two first bending portions 32 that form the first gap 33 by controlling the depth of insertion into the first gap 33. Exemplarily, the second bending portion 42 abuts against one of the first bending portions 32, and a gap is formed between the second bending portion 42 and the other first bending portion 32; or, the second bending portion 42 can abut against both of the first bending portions 32 simultaneously.

[0116] With such an arrangement, the second bending portion 42 is set to abut against at least one of the first bending portions 32 at the same first gap 33. Thus, the first bending portion 32 and the second bending portion 42 are arranged more closely in the second direction Y, so as to further reduce the space occupied by the first battery cell group 301 and the second battery cell group 401 in the second direction Y, thereby further reducing the size of the box body 10 in the second direction Y.

[0117] Please refer to Figure 8 , in some embodiments, the second bending portion 42 is spaced apart from at least one of the first bending portions 32 at the same first gap 33.

[0118] Understandably, the depth of insertion of the second bending portion 42 into the first gap 33 can be set to be relatively shallow, so that the second bending portion 42 is spaced apart from one of the two first bending portions 32 that form the first gap 33; or, the depth of insertion of the second bending portion 42 into the first gap 33 can be set to be even shallower, so that the second bending portion 42 is spaced apart from both of the two first bending portions 32 that form the first gap 33.

[0119] With such an arrangement, a structure for achieving cooling can be arranged between the second bending portion 42 and at least one of the first bending portions 32 at the same first gap 33, so as to improve the cooling effect on the first battery cell 30 and the second battery cell 40.

[0120] Please refer to Figures 4 to 7 , in some embodiments, the second battery cell 40 abuts against at least one of the first bending portions 32 at the same first gap 33.

[0121] Understandably, when at least part of the second battery cell 40 is disposed in the first gap 33, at least part of the second battery cell 40 is located between the two first bending portions 32 that form the first gap 33.

[0122] Thus, the second battery cell 40 can be made to abut against at least one of the two first bent portions 32 that form the first gap 33 by controlling the depth of insertion into the first gap 33. Exemplarily, the second battery cell 40 abuts against one of the first bent portions 32, and the second battery cell 40 forms a gap with the other first bent portion 32; alternatively, the second battery cell 40 can abut against both of the first bent portions 32 simultaneously.

[0123] With such an arrangement, the second battery cell 40 is arranged to abut against at least one of the first bent portions 32 at the same first gap 33. Thus, the first bent portion 32 and the second battery cell are arranged more closely in the second direction Y, so as to further reduce the space occupied by the first battery cell group 301 and the second battery cell 40 in the second direction Y, thereby further reducing the size of the box body 10 in the second direction Y.

[0124] Please refer to Figure 8 , in some embodiments, the second battery cell 40 is spaced apart from at least one of the first bent portions 32 at the same first gap 33.

[0125] It can be understood that the depth of insertion of the second battery cell 40 into the first gap 33 can be set to be relatively shallow, so that the second battery cell 40 is spaced apart from one of the two first bent portions 32 that form the first gap 33; or, the depth of insertion of the second battery cell 40 into the first gap 33 can be set to be shallower, so that the second battery cell 40 is spaced apart from both of the two first bent portions 32 that form the first gap 33.

[0126] With such an arrangement, a structure for cooling can be arranged between the second battery cell 40 and at least one of the first bent portions 32 at the same first gap 33, so as to improve the cooling effect on the first battery cell 30 and the second battery cell 40.

[0127] Please refer to Figure 7 and Figure 9 , in some embodiments, in the first direction X, two adjacent first flat portions 31 are spaced apart, and two adjacent second flat portions 41 are spaced apart; the second bent portion 42 is spaced apart from one of the two first bent portions 32 at the same first gap 33, and the second bent portion 42 abuts against the other of the two first bent portions 32 at the same first gap 33.

[0128] Understandably, in the first direction X, two adjacent first flat portions 31 and two adjacent second flat portions 41 are arranged at intervals. At the same time, the second bent portion 42 is spaced from one of the two adjacent first bent portions 32 and abuts against the other; thus, the interval between two adjacent first flat portions 31 can be communicated with the interval between two adjacent second flat portions 41 through the interval between the first bent portion 32 and the second bent portion 42; thereby, in the first direction X, the interval spaces between every two adjacent rows of the first battery cell group 301 and the interval spaces between every two adjacent rows of the second battery cell group 401 respectively correspond and are communicated with each other.

[0129] With such an arrangement, a buffer structure 50 and a cooling structure can be arranged in the intervals formed between every two rows of the first battery cell group 301 and the second battery cell group 401, so that the buffering effect on the first battery cell group 301 and the second battery cell group 401 can be effectively realized, and the cooling effect on the first battery cells 30 and the second battery cells 40 in the first battery cell group 301 and the second battery cell group 401 can be more effectively achieved.

[0130] Please refer to Figure 9 , in some embodiments, in the first direction X, the battery 100 further includes a liquid cooling structure 60, and the liquid cooling structure 60 is arranged between two adjacent spaced-apart first flat portions 31, two adjacent spaced-apart first bent portions 32 and the second bent portion 42, and two adjacent spaced-apart second flat portions 41.

[0131] Optionally, the liquid cooling structure 60 includes, but is not limited to, heat dissipation structures such as liquid cooling plates and liquid cooling tubes for allowing a coolant to flow through.

[0132] With such an arrangement, the liquid cooling structure 60 is arranged between two adjacent spaced-apart first flat portions 31, two adjacent spaced-apart first bent portions 32 and the second bent portion 42, and two adjacent spaced-apart second flat portions 41; thus, the liquid cooling structure 60 can perform heat exchange and heat dissipation at the relatively large-area first flat portions 31 and second flat portions 41 to effectively improve the cooling effect.

[0133] Please refer to Figure 9 , in some embodiments, a third gap 70 is formed between one side of the first battery cell group 301 in the first direction X and the inner wall surface of the box body 10; and / or, a fourth gap 80 is formed between the other side of the second battery cell group 401 in the first direction X and the inner wall surface of the box body 10.

[0134] Understandably, in the second direction Y, adjacent first battery cell groups 301 and second battery cell groups 401 can form a staggered arrangement along the first direction X. That is, at least part of the first bending portion 32 of the first battery cell 30 in the first battery cell group 301 can be disposed in the second gap 43, and at the same time, at least part of the second bending portion 42 of the second battery cell 40 in the second battery cell group 401 can be disposed in the first gap 33.

[0135] Accordingly, in the first direction X, the first battery cell group 301 and the second battery cell group 401 cannot be aligned; on at least one side in the first direction X, the first battery cell group 301 extends beyond the range of the second battery cell group 401, then a fourth gap 80 will be formed between the second battery cell group 401 and the inner wall surface of the box body 10; and / or, the second battery cell group 401 extends beyond the range of the first battery cell group 301, then a third gap 70 will be formed between the first battery cell group 301 and the inner wall surface of the box body 10.

[0136] Exemplarily, in some embodiments, in the first direction X, the number of rows formed by the arrangement of the first battery cell group 301 and the second battery cell group 401 is the same. The first bending portion 32 in the first battery cell group 301 is disposed in the second gap 43, and at the same time, the second bending portion 42 in the second battery cell 40 group is disposed in the first gap 33; at this time, one side of the first battery cell group 301 in the first direction X extends to the range of the second battery cell group 401, and the opposite side of the second battery cell group 401 in the first direction X extends to the range of the first battery cell group 301. Thus, a third gap 70 is formed between the first battery cell group 301 and the inner side wall of the box body 10 on one side in the first direction X, and a fourth gap 80 is formed between the second battery cell group 401 and the inner side wall of the box body 10 on the opposite side in the first direction X.

[0137] With such an arrangement, the third gap 70 and / or the fourth gap 80 can be used to arrange other structures to improve the space utilization rate in the accommodation cavity 101.

[0138] It should be understood that in order to improve the overall space utilization rate in the accommodation cavity 101 of the box body 10, the arrangement quantity of the first row of battery 100 cells and the second row of battery 100 cells can be increased, so that in the second direction Y, the box body 10 can save more dimensional space, thereby filling the space wasted by the third gap 70 and the fourth gap 80 in the first direction X, and further effectively improving the space utilization rate of the accommodation cavity 101 as a whole.

[0139] Please refer to Figure 9, in some embodiments, the battery 100 further includes at least one of a temperature sensor, an internal pressure sensor, and a pressure sensor (the temperature sensor, the internal pressure sensor, and the pressure sensor are not shown in the figure), and the temperature sensor, the internal pressure sensor, and the pressure sensor are disposed in the third gap 70 and / or the fourth gap 80.

[0140] With such an arrangement, by disposing at least one of the temperature sensor, the internal pressure sensor, and the pressure sensor in the third gap 70 and / or the fourth gap 80, the space in the accommodation cavity 101 can be utilized more reasonably to improve the space utilization rate in the accommodation cavity 101.

[0141] Please refer to Figure 9 , in some embodiments, a pressure relief mechanism (not shown in the figure) is further disposed on the box body 10, and the pressure relief mechanism is located at the third gap 70 and / or the fourth gap 80.

[0142] Optionally, the pressure relief mechanism includes, but is not limited to, a hydraulic valve, an explosion-proof valve, etc. The pressure relief mechanism is disposed on the box body 10. When thermal runaway occurs, the pressure relief mechanism can conduct the accommodation cavity 101 and the outside, so that the thermally runaway gas generated inside can be discharged and relieved outward through the pressure relief mechanism.

[0143] With such an arrangement, the pressure relief mechanism is disposed on the box body 10 and located at the third gap 70 and / or the fourth gap 80. The third gap 70 and the fourth gap 80 have a relatively large space for the flow and discharge of the thermally runaway gas, so that directional pressure relief can be achieved by the pressure relief mechanism at the third gap 70 and / or the fourth gap 80.

[0144] Please refer to Figure 10 , in some embodiments, two adjacent first battery cells 30 are connected by a first electrical connection structure 91, two adjacent second battery cells 40 are connected by a second electrical connection structure 92, and the first battery cell 30 and the adjacent second battery cell 40 are connected by a third electrical connection structure 93.

[0145] Among them, the first electrical connection structure 91 includes, but is not limited to, a metal connection structure with electrical conductivity such as a copper connection piece, an aluminum connection piece, a silver connection piece, and a gold connection piece. In any column of the first battery cell group 301, two adjacent first battery cells 30 are connected by the first electrical connection structure 91. For example, the electrical connection terminals of two adjacent first battery cells 30 are in contact connection through the first electrical connection structure 91 to realize the electrical connection of the two first battery cells 30.

[0146] The second electrical connection structure 92 includes, but is not limited to, metal connection structures with electrical conductivity such as copper connection sheets, aluminum connection sheets, silver connection sheets, and gold connection sheets. In any column of the second battery monomer groups 401, two adjacent second battery monomers 40 are connected through the second electrical connection structure 92. For example, the electrical connection terminals of two adjacent second battery monomers 40 are in contact connection through the second electrical connection structure 92 to achieve the electrical connection of the two second battery monomers 40.

[0147] The third electrical connection structure 93 includes, but is not limited to, metal connection structures with electrical conductivity such as copper connection sheets, aluminum connection sheets, silver connection sheets, and gold connection sheets. When at least part of the second bending portion 42 of the second battery monomer 40 is disposed in the first gap 33, the two first battery monomers 30 forming the first gap 33 are adjacent to the second battery monomer 40. Among them, the third electrical connection structure 93 can connect one of the first battery monomers 30 and the second battery monomer 40 adjacent to it in the second column of battery 100 monomers in the adjacent column to achieve the electrical connection between the first battery monomer group 301 and the second battery monomer group 401.

[0148] Exemplarily, the third electrical connection structure 93 can be, but is not limited to, various configurations such as an inclined electrical connection sheet and an L-shaped electrical connection sheet.

[0149] With such an arrangement, the first electrical connection structure 91 is used to connect the first battery monomers 30 in the first battery monomer group 301, the second electrical connection structure 92 is used to connect the second battery monomers 40 in the second battery monomer group 401, and at the same time, the third electrical connection structure 93 is used to connect the first battery monomer 30 and the adjacent second battery monomer 40.

[0150] Next, the battery 100 of the present application will be described in detail according to specific embodiments.

[0151] Please refer to Figures 4 to 10 , in this embodiment, the battery 100 includes a box body 10, a first battery monomer 30, and a second battery monomer 40. An accommodation cavity 101 is formed inside the box body 10. A plurality of first battery monomers 30 are arranged in sequence along the first direction X to form a first battery monomer group 301, and a plurality of second battery monomers 40 are arranged in sequence along the first direction X to form a second battery monomer group 401; the first battery monomer group 301 and the second battery monomer group 401 are arranged alternately in sequence along the second direction Y.

[0152] Among them, the first battery cell 30 includes a first straight portion 31 and first bending portions 32 connected to opposite ends of the first straight portion 31 along the second direction Y. A first gap 33 is formed between two adjacent first bending portions 32 in the first direction X. The second battery cell 40 includes a second straight portion 41 and second bending portions 42 connected to opposite ends of the second straight portion 41 along the second direction Y. A second gap 43 is formed between two adjacent second bending portions 42 in the first direction X.

[0153] In the second direction Y, a part of the first bending portion 32 can be disposed in the second gap 43, and at the same time, a part of the second bending portion 42 can be disposed in the first gap 33. Thus, the arrangement of the first battery cell group 301 and the second battery cell group 401 in the second direction Y is more compact, and the space occupied by the first battery cell group 301 and the second battery cell group 401 in the second direction Y is lower. Therefore, the size of the box body 10 in the second direction Y can be effectively reduced.

[0154] Please refer to Figures 1 to 3 , in a second aspect, an embodiment of the present application further provides an electrical device, including the battery 100 as described above, and the battery 100 is used to provide electrical energy.

[0155] The electrical device provided by the embodiment of the present application, such as the vehicle 1000 as described above, includes the battery 100 as described above. On the basis that the size of the battery 100 as described above is reduced, the reserved space for accommodating the battery 100 in the electrical device can also be effectively reduced.

[0156] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements 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: including a box body, an accommodation cavity being formed inside the box body; a first battery cell, a plurality of the first battery cells being arranged in sequence along a first direction to form a first battery cell group, the first battery cell including a first straight portion and a first bent portion connected to at least one end of the first straight portion along a second direction, the first direction being perpendicular to the second direction; in the first direction, a first gap is formed between the first bent portions of two adjacent first battery cells; and a second battery cell, in the second direction, the second battery cell being disposed on at least one side of the first battery cell group, a part of the second battery cell being disposed in the first gap.

2. The battery according to claim 1, wherein: A plurality of the second battery cells are arranged in sequence along the first direction to form a second battery cell group, in the second direction, the first battery cell group and the second battery cell group are arranged in sequence, and at least some of the second battery cells in the second battery cell group are disposed in the corresponding first gaps.

3. The battery according to claim 2, characterized in that: The second battery cell is a cylindrical battery cell.

4. The battery according to claim 2, characterized in that: The second battery cell includes a second straight portion and a second bent portion connected to at least one end of the second straight portion along the second direction, at least a part of the second bent portion being disposed in the first gap; in the first direction, a second gap is formed between two adjacent second bent portions; at least a part of the first bent portion is disposed in the second gap formed by two adjacent second battery cell groups.

5. The battery according to claim 4, characterized in that: In the first direction, at least two adjacent first straight portions are in contact with each other; and / or, in the first direction, at least two adjacent second straight portions are in contact with each other.

6. The battery according to claim 4 or 5, characterized in that: In the first direction, at least two adjacent first straight portions are spaced apart; and / or, in the first direction, at least two adjacent second straight portions are spaced apart.

7. The battery according to claim 6, characterized in that: The battery further includes a buffer structure, in the first direction, the buffer structure is disposed between two adjacent first straight portions that are spaced apart; and / or, in the first direction, the buffer structure is disposed between two adjacent second straight portions that are spaced apart.

8. The battery according to any one of claims 4 to 7, characterized in that: The second bent portion abuts against at least one of the first bent portions at the same first gap.

9. The battery according to any one of claims 4 to 7, characterized in that: The second bent portion is spaced apart from at least one of the first bent portions at the same first gap.

10. The battery according to claim 1 or 2, characterized in that: The second battery cell abuts against at least one of the first bent portions at the same first gap.

11. The battery according to claim 1 or 2, characterized in that: The second battery cell is spaced apart from at least one of the first bent portions at the same first gap.

12. The battery according to claim 9, wherein: In the first direction, two adjacent first straight portions are spaced apart, and two adjacent second straight portions are spaced apart; the second bent portion is spaced apart from one of the two first bent portions at the same first gap, and the second bent portion abuts against the other of the two first bent portions at the same first gap.

13. The battery according to claim 12, characterized in that: The battery further includes a liquid cooling structure, the liquid cooling structure being disposed between two adjacent first straight portions that are spaced apart, between two adjacent first bent portions that are spaced apart, and the second bent portion, and between two adjacent second straight portions that are spaced apart.

14. The battery according to claim 2, wherein: A third gap is formed between one side of the first battery cell group in the first direction and the inner wall surface of the box body; and / or, a fourth gap is formed between the other side of the second battery cell group in the first direction and the inner wall surface of the box body.

15. The battery according to claim 14, wherein: The battery further includes at least one of a temperature sensor, an internal pressure sensor, and a pressure sensor, and the temperature sensor, the internal pressure sensor, and the pressure sensor are disposed in the third gap and / or the fourth gap.

16. The battery according to claim 14 or 15, characterized in that: A pressure relief mechanism is further disposed on the box body, and the pressure relief mechanism is located at the third gap and / or the fourth gap.

17. The battery according to claim 2, wherein: Two adjacent first battery cells are connected by a first electrical connection structure, two adjacent second battery cells are connected by a second electrical connection structure, and the first battery cell and the adjacent second battery cell are connected by a third electrical connection structure.

18. An electrical device, characterized in that: A battery includes the battery according to any one of claims 1 to 17, and the battery is used for providing electric energy.

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