Battery and electric equipment

Abstract

The battery (100) comprises a box body (10), first battery monomers (30) and second battery monomers (40), the plurality of first battery monomers (30) are arranged along a first direction (X) to form a first battery monomer group (301), and each first battery monomer (30) comprises a first straight part (31) and first bent parts (32) located at two opposite ends of the first straight part (31) along a second direction (Y); in the first direction (X), a first gap (33) is formed between every two adjacent first bent parts (32); in the second direction (Y), a portion of the second battery cell (40) is provided in the first gap (33). In the second direction (Y), the second battery monomers (40) and the first battery monomer group (301) are closely arranged, and the size of the box body (10) in the second direction (Y) can be reduced.

Description

Batteries and electrical equipment Technical Field

[0001] This application relates to the field of battery structure technology, and in particular to a battery and an electrical device. Background Technology

[0002] Batteries are widely used in the new energy field, such as electric vehicles and new energy vehicles, which have become a new trend in the automotive industry. A battery consists of a casing and the individual battery cells and other components housed within it. The arrangement of the battery cells significantly impacts the size of the casing; therefore, how to arrange the battery cells more densely to reduce the size of the casing is a pressing technical problem in battery technology.

[0003] Application content

[0004] The purpose of this application is to provide a battery and electrical device that reduces the size of the casing by arranging the battery cells closely.

[0005] To achieve the above objectives, the technical solution adopted in the embodiments of this application is as follows:

[0006] In a first aspect, embodiments of this application provide a battery, including a housing, a first battery cell, and a second battery cell. The housing has an internal cavity. A plurality of first battery cells are arranged sequentially along a first direction to form a first battery cell group. Each first battery cell includes 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 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, a second battery cell is disposed on at least one side of the first battery cell group, and a portion of the second battery cell is disposed in the first gap.

[0007] The beneficial effects of the embodiments of this application are as follows: The battery provided in the embodiments of this application allows the first battery cells to be arranged sequentially along a first direction to form a first battery cell group, and a first gap is formed between the first bends 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 disposed in the first gap; thereby, in the second direction, the arrangement of the second battery cells and the first battery cell group is more compact, and the arrangement space occupied by the second battery cells and the first battery cell group is effectively reduced, so the size of the casing in the second direction can also be reduced accordingly.

[0008] In some embodiments, a plurality of second battery cells are arranged sequentially along a first direction to form a second battery cell group, and a first battery cell group and a second battery cell group are arranged sequentially along a second direction, with at least a portion of the second battery cells in the second battery cell group disposed in a corresponding first gap.

[0009] By adopting the above technical solution, multiple second battery cells can be arranged along the first direction to form a second battery cell group, and the second battery cell group and the first battery cell group are arranged along the second direction. Thus, when at least some of the second battery cells in the second battery cell group are disposed in the corresponding first gap, the first battery cell group and the second battery cell group are arranged more compactly in the second direction, and the arrangement space occupied by the first battery cell group and the second battery cell group in the second direction is effectively reduced. Therefore, the size of the box in the second direction can also be reduced accordingly.

[0010] In some embodiments, the second battery cell is a cylindrical battery cell.

[0011] By adopting the above technical solution, the portion of the cylindrical battery cell in the second direction can be set in the first gap; at the same time, after multiple cylindrical battery cells are arranged along the first direction to form a second battery cell group, gaps can also be formed between adjacent cylindrical battery cells, so that the portion of the first bent part in the second direction can also be set in the gap of the cylindrical battery cells, thereby further reducing the size of the casing in the second direction.

[0012] In some embodiments, 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 a second direction, at least a portion of the second bent portion being disposed in a first gap; in the first direction, a second gap is formed between two adjacent second bent portions; at least a portion of the first bent portion is disposed in the second gap formed by adjacent groups of second battery cells.

[0013] By adopting the above technical solution, at least a portion of the second bending portion can be disposed in the first gap, and at least a portion of the first bending portion can be disposed in the second gap. This can further improve the compactness of the arrangement of the first battery cell group and the second battery cell group in the second direction, thereby further reducing the arrangement space occupied by the first battery cell group and the second battery cell group in the second direction, and further reducing the size of the housing in the second direction.

[0014] In some embodiments, at least two adjacent first straight portions are abutted in a first direction; and / or, at least two adjacent second straight portions are abutted in a first direction.

[0015] By adopting the above technical solution, by setting at least two adjacent first straight portions to be in contact in the first direction, and / or by setting at least two adjacent second straight portions to be in contact in the first direction, the first battery cell group and / or the second battery cell group are more compact in the first direction, thereby effectively reducing the space occupied by the first battery cell group and / or the second battery cell group in the first direction, and thus reducing the size of the housing in the first direction.

[0016] In some embodiments, at least two adjacent first straight portions are spaced apart in a first direction; and / or, at least two adjacent second straight portions are spaced apart in a first direction.

[0017] By adopting the above technical solution, by setting at least two adjacent first straight portions to be spaced apart in a first direction, a buffer structure and / or liquid cooling structure can be provided between the two spaced first straight portions to balance the expansion force formed by the first battery cell group and to cool the first battery cell with water; and / or, by setting at least two adjacent second straight portions to be spaced apart in a first direction, a buffer structure and / or liquid cooling structure can be provided between the two spaced second straight portions to balance the expansion force formed by the second battery cell group and to cool the second battery cell with water.

[0018] In some embodiments, the battery further includes a buffer structure disposed between two adjacent first straight portions spaced apart in a first direction; and / or, a buffer structure disposed between two adjacent second straight portions spaced apart in a first direction.

[0019] By adopting the above technical solution, and by setting a buffer structure between two adjacent first straight sections and / or two adjacent second straight sections, 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.

[0020] In some embodiments, the second bend abuts against at least one first bend at the same first gap.

[0021] By adopting the above technical solution, the second bending portion is configured to abut against at least one first bending portion at the same first gap. As a result, the first bending portion and the second bending portion 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 group in the second direction, thereby further reducing the size of the housing in the second direction.

[0022] In some embodiments, the second bend is spaced apart from at least one first bend at the same first gap.

[0023] By adopting the above technical solution, a structure for cooling can be arranged between the second bending portion and at least one first bending portion at the same first gap, so as to improve the cooling effect on the first battery cell and the second battery cell.

[0024] In some embodiments, the second battery cell abuts against at least one first bend at the same first gap.

[0025] By adopting the above technical solution, the second battery cell is configured to abut against at least one first bend at the same first gap. As a result, the first bend and the second battery cell are arranged more closely in the second direction, thereby further reducing the space occupied by the first battery cell group and the second battery cell in the second direction, and thus further reducing the size of the housing in the second direction.

[0026] In some embodiments, the second battery cell is spaced apart from at least one first bend at the same first gap.

[0027] By adopting the above technical solution, a structure for cooling can be arranged between the second battery cell and at least one first bend at the same first gap, so as to improve the cooling effect on the first battery cell and the second battery cell.

[0028] In some embodiments, in a 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.

[0029] By adopting the above technical solution, the two adjacent first straight sections and the two adjacent second straight sections can be connected through the gap between the first and second bending sections, so as to facilitate the layout operation of the structure for achieving cooling and the structure for achieving buffering.

[0030] In some embodiments, in the first direction, the battery further includes a liquid cooling structure disposed between two adjacent spaced-apart first straight portions, two adjacent spaced-apart first bent portions and second bent portions, and two adjacent spaced-apart second straight portions.

[0031] By adopting the above technical solution, the liquid cooling structure can form contact with the first flat part and the second flat part, thereby improving the cooling effect of the liquid cooling structure on the first battery cell and the second battery cell.

[0032] 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 housing; 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 housing.

[0033] 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 cavity.

[0034] In some embodiments, the battery further includes at least one of a temperature sensor, an internal pressure sensor, and a pressure sensor, wherein the temperature sensor, the internal pressure sensor, and the pressure sensor are disposed in a third gap and / or a fourth gap.

[0035] By adopting the above technical solution, and by setting at least one of the temperature sensor, internal pressure sensor, and pressure sensor in the third gap and / or the fourth gap, the space inside the receiving cavity can be utilized more rationally, thereby improving the space utilization rate of the receiving cavity.

[0036] In some embodiments, the housing is further provided with a pressure relief mechanism, which is located at the third gap and / or the fourth gap.

[0037] By adopting the above technical solution, the pressure relief mechanism can also be installed on the housing and located at the third gap and / or the fourth gap, thereby enabling directional pressure relief at the third gap and / or the fourth gap.

[0038] 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.

[0039] By adopting the above technical solution, the first battery cell in the first battery cell group is connected by the first electrical connection structure, the second battery cell in the second battery cell group is connected by the second electrical connection structure, and the first battery cell and the adjacent second battery cell are connected by the third electrical connection structure.

[0040] Secondly, embodiments of this application also provide an electrical device, including a battery as described above, the battery being used to provide electrical energy.

[0041] The beneficial effects of the embodiments of this application are as follows: The electrical equipment provided in the embodiments of this application includes the battery described above. With the size of the battery reduced, the reserved space for accommodating the battery in the electrical equipment is also effectively reduced. Attached Figure Description

[0042] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 is a structural schematic diagram of a vehicle provided in some embodiments of this application;

[0044] Figure 2 is an exploded view of a battery provided in some embodiments of this application;

[0045] Figure 3 is a schematic diagram of the exploded structure of a battery cell provided in some embodiments of this application;

[0046] Figure 4 is a schematic diagram of the arrangement structure of the first battery cell group and the second battery cell group along the second direction provided in the embodiment of this application;

[0047] Figure 5 is a schematic diagram of a first arrangement structure of the first battery cell and the second battery cell provided in an embodiment of this application;

[0048] Figure 6 is a schematic diagram of a second arrangement structure of the first and second battery cells provided in an embodiment of this application.

[0049] Figure 7 is a schematic diagram of a third arrangement structure of the first and second battery cells provided in the embodiments of this application.

[0050] Figure 8 is a schematic diagram of the fourth arrangement structure of the first and second battery cells provided in the embodiments of this application;

[0051] Figure 9 is a schematic diagram of the arrangement of the first and second battery cell groups in the housing according to an embodiment of this application.

[0052] Figure 10 is a schematic diagram of the electrical connection structure of the first battery cell and the second battery cell provided in the embodiment of this application;

[0053] Figure 11 is a schematic diagram of the arrangement structure when the second battery cell provided in the embodiment of this application is a cylindrical battery cell.

[0054] In the figures, the following labels are used: 1000, vehicle; 100, battery; 200, controller; 300, motor; 10, housing; 101, receiving cavity; 11, first part; 12, second part; 20, battery cell; 21, end cap; 21a, electrode terminal; 22, housing; 23, electrode assembly; 23a, tab; 30, first battery cell; 301, first battery cell group; 31, first straight part; 32, first bent part; 33, first gap; 40, second battery cell; 401, second battery cell group; 41, second straight part; 42, second bent part; 43, second gap; 50, buffer structure; 60, liquid cooling structure; 70, third gap; 80, fourth gap; 91, first electrical connection structure; 92, second electrical connection structure; 93, third electrical connection structure; X, first direction; Y, second direction. Detailed Implementation

[0055] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein 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 with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0056] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0058] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0059] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0060] Batteries are widely used in the new energy field, such as electric vehicles and new energy vehicles, which have become a new trend in the automotive industry. A battery consists of a casing and the individual battery cells and other components housed within it. The arrangement of the battery cells significantly impacts the size of the casing; therefore, how to arrange the battery cells more densely to reduce the size of the casing is a pressing technical problem in battery technology.

[0061] 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 casing, a battery is designed. By arranging the first battery cells sequentially along the first direction to form a first battery cell group, a gap is formed between the first bends 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 placed in the first gap, so that the arrangement of the second battery cells and the first battery cell group is more compact, and the arrangement space occupied by the second battery cells and the first battery cell group is effectively reduced. Therefore, the size of the casing in the second direction can also be reduced accordingly.

[0062] The batteries disclosed in this application can be used in electrical devices that use batteries as a power source or in various energy storage systems that use batteries as energy storage elements. Electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0063] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0064] Please refer to Figure 1, which is a structural schematic diagram of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery 100 is disposed inside the vehicle 1000, and the battery 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery 100 can be used to power the vehicle 1000; for example, the battery 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during startup, navigation, and driving.

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

[0066] Please refer to Figure 2, which is an exploded view of a battery 100 provided in some embodiments of this application. The battery 100 includes a housing 10 and a battery cell 20, with the battery cell 20 housed within the housing 10. The housing 10 provides a space for the battery cell 20 and can have various structures. In some embodiments, the housing 10 may include a first portion 11 and a second portion 12, which overlap each other, jointly defining a space for accommodating the battery cell 20. The second portion 12 may be a hollow structure with one open end, and the first portion 11 may be a plate-like structure, covering the open side of the second portion 12 so that the first portion 11 and the second portion 12 jointly define the space. Alternatively, the first portion 11 and the second portion 12 may both be hollow structures with one open side, with the open side of the first portion 11 covering the open side of the second portion 12. Of course, the housing 10 formed by the first portion 11 and the second portion 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0067] In battery 100, there can be multiple battery cells 20, which can be connected in series, parallel, or in a mixed manner. A mixed connection means that multiple battery cells 20 are connected in both series and parallel configurations. Multiple battery cells 20 can be directly connected in series, parallel, or in a mixed manner, and then the entire assembly of the multiple battery cells 20 is housed within the housing 10. Alternatively, battery 100 can also be composed of multiple battery cells 20 first connected in series, parallel, or in a mixed manner to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed manner to form a whole, which is also housed within the housing 10. Battery 100 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells 20.

[0068] 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 to these. The battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0069] Please refer to Figure 3, which is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. A battery cell 20 refers to the smallest unit that makes up the battery 100. As shown in Figure 3, the battery cell 20 includes a casing (including end caps 21 and housing 22), electrode assemblies 23, and other functional components.

[0070] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, allowing battery cell 20 to have higher structural strength and improved reliability. Functional components such as electrode terminals 21a can be provided on end cap 21. Electrode terminals 21a can be used for electrical connection with electrode assembly 23 to output or input electrical energy to battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0071] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, 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 closes the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes 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 housing 22 can be made of various materials, such as, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0072] Electrode assembly 23 is the component in the battery cell 20 where electrochemical reactions occur. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking anode and cathode electrodes, and typically a separator is provided between the anode and cathode electrodes. The portions of the anode and cathode electrodes containing active material constitute the main body of the electrode assembly 23, while the portions of the anode and cathode electrodes without active material each constitute a tab 23a. The anode and cathode tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the anode and cathode active materials react with the electrolyte, and the tabs 23a connect to the electrode terminals 21a to form a current loop.

[0073] According to some embodiments of this application, referring to Figures 3, 4 and 9, this application provides a battery 100, including a housing 10, a first battery cell 30 and a second battery cell 40. The housing 10 has a receiving cavity 101 inside. A plurality of first battery cells 30 are arranged sequentially 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 a 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, a second battery cell 40 is disposed on at least one side of the first battery cell group 301, and a portion of the second battery cell 40 is disposed in the first gap 33.

[0074] The first battery cell 30 includes a first straight portion 31 and a first bent portion 32. Understandably, the first straight portion 31 refers to the central main body portion of the first battery cell 30, including two planar surfaces on opposite sides; the first bent portion 32 refers to an end portion located on at least one side of the straight portion in the second direction Y, and having a bent shape. Optionally, the first bent portion 32 can be provided on one side of the first straight portion 31; or, the first bent portion 32 can be provided on both opposite sides of the first straight portion 31. The second direction Y can be any direction. For example, the second direction Y can be, but is not limited to, the length direction, width direction, or height direction of the housing 10.

[0075] It should be understood that the first electrode assembly (not shown in the figure, but refer to electrode assembly 23 in Figure 3) inside the first battery cell 30 is a wound body formed by winding. Therefore, the opposite ends of the first electrode assembly are bent to form an arc-shaped bending structure. The first battery cell 30 is configured to include a first straight portion 31 and a first bent portion 32. The corresponding housing portion of the bent portion 32 is also bent. Therefore, the housing portion and the arc-shaped bending portion of the first electrode assembly inside have better fit, thereby making the force exerted by the housing portion on the first electrode assembly more balanced, and thus improving the stability of the first battery cell 30.

[0076] The external structure of the first bending part 32 includes, but is not limited to, a circular arc structure, a triangular structure, a polygonal structure, and a triangular arc structure.

[0077] Multiple first battery cells 30 are arranged sequentially along a first direction X to form a first battery cell group 301; wherein the number of first battery cells 30 can be any number of two, three, or more; the first direction X can be any direction. For example, the first direction X can be, but is not limited to, the length direction, width direction, or height direction of the housing 10. Optionally, the first battery cells 30 can be arranged along the first direction X to form a row of first battery cell groups 301, or the first battery cells 30 can be arranged along the first direction X to form two or more rows of first battery cell groups 301, and each first battery cell group 301 can be arranged sequentially along a second direction Y.

[0078] In one of the first battery cell groups 301, a first gap 33 is formed between the first bends 32 of two adjacent first battery cells 30. In the second direction Y, a second battery cell 40 is disposed on at least one side of the first battery cell group 301, and the portion of the second battery cell 40 facing the first battery cell group 301 in the second direction Y can be disposed in the first gap 33; thereby, the compactness of the arrangement of the first battery cell group 301 and the second battery cell 40 in the second direction Y is effectively improved.

[0079] Optionally, the number of second battery cells 40 can be one or more; the second battery cells 40 can be disposed on either side of the first battery cell group 301 in the second direction Y, or the second battery cells 40 can be disposed on both opposite sides of the first battery cell group 301 in the second direction Y. Furthermore, in the first direction X, only one row of second battery cells 40 can be arranged, or multiple rows of second battery cells 40 can be arranged.

[0080] The battery 100 provided in this application embodiment allows first battery cells 30 to be arranged sequentially along a first direction X to form a first battery cell group 301. A first gap 33 is formed between the first bends 32 of two adjacent first battery cells 30 in the first direction X, so that a portion of the second battery cell 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. As a result, the arrangement of the second battery cell 40 and the first battery cell group 301 is more compact in the second direction Y, and the arrangement space occupied by the second battery cell 40 and the first battery cell group 301 is effectively reduced. Therefore, the size of the housing 10 in the second direction Y can also be reduced accordingly.

[0081] Referring to Figures 4 and 9, in some embodiments, a plurality of second battery cells 40 are arranged sequentially along a first direction X to form a second battery cell group 401. In the second direction Y, a first battery cell group 301 and a second battery cell group 401 are arranged sequentially, and at least some of the second battery cells 40 in the second battery cell group 401 are disposed in the corresponding first gap 33.

[0082] Multiple second battery cells 40 are arranged sequentially along the first direction X to form a second battery cell group 401. Optionally, the number of second battery cells 40 in the same column of second battery cell group 401 can be any number of two, three, or more. The second battery cells 40 can be arranged in two or more rows along the first direction X. For example, the number of second battery cells 40 arranged along the first direction X is less than the number of first battery cells 30 arranged along the first direction X, so that each second battery cell 40 in an adjacent second battery cell group 401 can be partially disposed in the corresponding first gap 33. Alternatively, the number of second battery cells 40 arranged along the first direction X is greater than or equal to the number of first battery cells 30 arranged along the first direction X, so that some second battery cells 40 in an adjacent second battery cell group 401 can be disposed in the corresponding first gap 33, while other 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.

[0083] For example, in some embodiments, the first battery cell group 301 and the second battery cell group 401 may be arranged alternately in the second direction Y.

[0084] With this configuration, multiple second battery cells 40 can be arranged along the first direction X to form a 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 placed in the corresponding first gap 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 housing 10 in the second direction Y can also be reduced accordingly.

[0085] Please refer to Figures 2 and 11. In some embodiments, the second battery cell 40 is a cylindrical battery cell.

[0086] With this configuration, the portion of the cylindrical battery cell in the second direction Y can be placed in the first gap 33; at the same time, after multiple 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, so that the portion of the first bent part 32 in the second direction Y can also be placed in the gap of the cylindrical battery cells, thereby further reducing the size of the housing 10 in the second direction Y.

[0087] Referring to Figures 4 and 9, in some embodiments, the second battery cell 40 includes a second straight portion 41 and a second bent portion 42 connected to at least one end of the second straight portion 41 along a second direction Y. At least a portion of the second bent portion 42 is disposed in a first gap 33. A second gap 43 is formed between two adjacent second bent portions 42 in the first direction X. At least a portion of the first bent portion 32 is disposed in the second gap 43 formed by adjacent second battery cell groups 401.

[0088] The second battery cell 40 includes a second straight portion 41 and a second bent portion 42. Understandably, the second straight portion 41 refers to the central main body portion of the second battery cell 40, including two planar surfaces on opposite sides; the second bent portion 42 refers to an end portion of the second straight portion 41 located on at least one side in the second direction Y, and having a bent shape. Optionally, the second bent portion 42 can be provided at one end of the second straight portion 41; or, the second bent portion 42 can be provided at both opposite ends of the second straight portion 41.

[0089] It should be understood that the second electrode assembly inside the second battery cell 40 (not shown in the figure, but refer to electrode assembly 23 in Figure 3) is a wound body formed by winding. Therefore, the opposite ends of the second electrode assembly are bent to form an arc-shaped bending structure. By configuring the second battery cell 40 to include a second straight portion 41 and a second bent portion 42, the bent external structure of the second bent portion 42 allows for better fit between the casing of the second battery cell 40 at the second bent portion 42 and the arc-shaped bending structure formed by the winding of the second electrode assembly inside. This results in a more balanced force exerted by the second battery cell 40 on the second electrode assembly, thereby improving the stability of the second battery cell 40.

[0090] The external structure of the second bending part 42 includes, but is not limited to, a circular arc structure, a triangular structure, a polygonal structure, and a triangular arc structure.

[0091] In one of the second battery cell groups 401, a second gap 43 is formed between the second bends 42 of two adjacent second battery cells 40. In the second direction Y, a portion of the second battery cells 40 in the second battery cell group 401 can be disposed in the first gap 33, thereby a portion of the first battery cells 30 in the first battery cell group 301 can be disposed in the second gap 43 simultaneously; therefore, the compactness of the arrangement of the first battery cell group 301 and the second battery cell group 401 in the second direction Y is effectively improved.

[0092] With this configuration, at least a portion of the second bending portion 42 can be disposed in the first gap 33, and at least a portion of the first bending portion 32 can be disposed in the second gap 43. This further improves the compactness of the arrangement of the first battery cell group 301 and the second battery cell group 401 in the second direction Y, 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 housing 10 in the second direction Y.

[0093] Referring to Figures 4, 5, and 9, in some embodiments, at least two adjacent first straight portions 31 are abutted in the first direction X; and / or, at least two adjacent second straight portions 41 are abutted in the first direction X.

[0094] In the first direction X, at least two adjacent first straight portions 31 are in contact with each other; optionally, the first straight portions 31 of every two adjacent first battery cells 30 can be in contact with each other; or, a portion of the first straight portions 31 of adjacent first battery cells 30 can be in contact with each other, and another portion of the first straight portions 31 of adjacent first battery cells 30 can be spaced apart, for example, every two or more of any number of first straight portions 31 are in contact with the next adjacent first straight portion 31.

[0095] In the first direction X, at least two adjacent second straight portions 41 are in contact with each other; optionally, the second straight portions 41 of every two adjacent second battery cells 40 can be in contact with each other; or, a portion of the second straight portions 41 of adjacent second battery cells 40 can be in contact with each other, and another portion of the second straight portions 41 of adjacent second battery cells 40 can be spaced apart, for example, every two or more of any number of second straight portions 41 are in contact with the next adjacent second straight portion 41.

[0096] With this configuration, by setting at least two adjacent first straight portions 31 to be in contact with each other in the first direction X, and / or by setting at least two adjacent second straight portions 41 to be in contact with each other in the first direction X, the first battery cell group 301 and / or the second battery cell group 401 are more compact in the first direction X, thereby effectively reducing the space occupied by the first battery cell group 301 and / or the second battery cell group 401 in the first direction X, and thus reducing the size of the housing 10 in the first direction X.

[0097] Referring to Figures 4, 6 to 8, in some embodiments, at least two adjacent first straight portions 31 are spaced apart in the first direction X; and / or, at least two adjacent second straight portions 41 are spaced apart in the first direction X.

[0098] In the first direction X, at least two adjacent first straight portions 31 are spaced apart; optionally, the first straight portions 31 of each pair of adjacent first battery cells 30 can be spaced apart; or, a portion of the first straight portions 31 of adjacent first battery cells 30 can be fitted together, and another portion of the first straight portions 31 of adjacent first battery cells 30 can be spaced apart, for example, every two or more of any number of first straight portions 31 are spaced apart from the next adjacent first straight portion 31.

[0099] In the first direction X, at least two adjacent second straight portions 41 are spaced apart; optionally, the second straight portions 41 of each two adjacent second battery cells 40 can be spaced apart; or, some of the second straight portions 41 of adjacent second battery cells 40 can be fitted together, and other parts of the second straight portions 41 of adjacent second battery cells 40 can be spaced apart, for example, every two or more of any number of second straight portions 41 are spaced apart from the next adjacent second straight portion 41.

[0100] With this configuration, by setting at least two adjacent first straight portions 31 to be spaced apart in the first direction X, a buffer structure and / or liquid cooling structure can be provided between the two spaced first straight portions 31 to balance the expansion force formed by the first battery cell group 301 and to enable water cooling of the first battery cell 30; and / or, by setting at least two adjacent second straight portions 41 to be spaced apart in the first direction X, a buffer structure and / or liquid cooling structure can be provided between the two spaced second straight portions 41 to balance the expansion force formed by the second battery cell group 401 and to enable water cooling of the second battery cell 40.

[0101] Referring to Figures 4 and 6, in some embodiments, the battery 100 further includes a buffer structure 50, which is disposed between two adjacent first straight portions 31 spaced apart in the first direction X; and / or, a buffer structure 50 is disposed between two adjacent second straight portions 41 spaced apart in the first direction X.

[0102] Among them, the buffer structure 50 includes, but is not limited to, buffer pads, buffer coatings, buffer blocks and other structural components with buffering and energy absorption effects.

[0103] The buffer structure 50 may be disposed between two adjacent first straight portions 31 spaced apart in the first direction X, and / or the buffer structure 50 may be disposed between two adjacent second straight portions 41 spaced apart in the first direction X.

[0104] With this configuration, by providing a buffer structure 50 between two adjacent first straight portions 31 and / or between two adjacent second straight portions 41, 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.

[0105] Referring to Figures 4 to 7, in some embodiments, the second bend 42 abuts against at least one first bend 32 at the same first gap 33.

[0106] Understandably, when at least a portion of the second bend 42 is disposed in the first gap 33, the at least portion of the second bend 42 is located between the two first bends 32 forming the first gap 33. Similarly, when at least a portion of the first bend 32 is disposed in the second gap 43, the at least portion of the first bend 32 is located between two adjacent second bends 42 forming the second gap 43.

[0107] Therefore, the second bend 42 can abut against at least one of the two first bends 32 forming the first gap 33 by controlling the depth of insertion into the first gap 33. For example, the second bend 42 abuts against one of the first bends 32, with the second bend 42 spaced apart from the other first bend 32; or, the second bend 42 can abut against both first bends 32 simultaneously.

[0108] With this configuration, the second bend 42 is positioned to abut against at least one first bend 32 at the same first gap 33. As a result, the first bend 32 and the second bend 42 are arranged more closely in the second direction Y, thereby further reducing the space occupied by the first battery cell group 301 and the second battery cell group 401 in the second direction Y, and thus further reducing the size of the housing 10 in the second direction Y.

[0109] Referring to Figure 8, in some embodiments, the second bend 42 is spaced apart from at least one first bend 32 at the same first gap 33.

[0110] Understandably, the depth to which the second bend 42 is inserted into the first gap 33 can be set to be relatively shallow, so that the second bend 42 is spaced apart from one of the two first bends 32 forming the first gap 33; or, the depth to which the second bend 42 is inserted into the first gap 33 can be set to be even shallower, so that the second bend 42 is spaced apart from both of the two first bends 32 forming the first gap 33.

[0111] With this configuration, a cooling structure can be arranged between the second bend 42 and at least one first bend 32 at the same first gap 33 to improve the cooling effect on the first battery cell 30 and the second battery cell 40.

[0112] Referring to Figures 4 to 7, in some embodiments, the second battery cell 40 abuts against at least one first bend 32 at the same first gap 33.

[0113] Understandably, when at least a portion of the second battery cell 40 is disposed in the first gap 33, at least a portion of the second battery cell 40 is located between the two first bends 32 forming the first gap 33.

[0114] Therefore, the second battery cell 40 can abut against at least one of the two first bends 32 forming the first gap 33 by controlling the depth of insertion into the first gap 33. For example, the second battery cell 40 abuts against one of the first bends 32, and the second battery cell 40 is spaced apart from the other first bend 32; or, the second battery cell 40 can abut against both first bends 32 simultaneously.

[0115] With this configuration, the second battery cell 40 is positioned to abut against at least one first bend 32 at the same first gap 33. As a result, the first bend 32 and the second battery cell are arranged more closely in the second direction Y, thereby further reducing the space occupied by the first battery cell group 301 and the second battery cell 40 in the second direction Y, and thus further reducing the size of the housing 10 in the second direction Y.

[0116] Referring to Figure 8, in some embodiments, the second battery cell 40 is spaced apart from at least one first bend 32 at the same first gap 33.

[0117] Understandably, the depth to which the second battery cell 40 is inserted 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 bends 32 forming the first gap 33; or, the depth to which the second battery cell 40 is inserted into the first gap 33 can be set to be even shallower, so that the second battery cell 40 is spaced apart from both of the two first bends 32 forming the first gap 33.

[0118] With this configuration, a cooling structure can be arranged between the second battery cell 40 and at least one first bend 32 at the same first gap 33 to improve the cooling effect on the first battery cell 30 and the second battery cell 40.

[0119] Referring to Figures 7 and 9, in some embodiments, in the first direction X, two adjacent first straight portions 31 are spaced apart, and two adjacent second straight 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.

[0120] Understandably, in the first direction X, two adjacent first straight portions 31 and two adjacent second straight portions 41 are spaced apart. Simultaneously, the second bent portion 42 is spaced apart from one of the two adjacent first bent portions 32 and abuts against the other; thus, the gap between two adjacent first straight portions 31 can be connected through the gap between the first bent portion 32 and the second bent portion 42 and the gap between two adjacent second straight portions 41; thereby, in the first direction X, each row of the gap space between two adjacent rows of the first battery cell group 301 and the gap space between two adjacent rows of the second battery cell group 401 is respectively connected.

[0121] This configuration allows for the arrangement of buffer structures 50 and cooling structures in the gaps between each row of the first battery cell group 301 and the second battery cell group 401. This effectively buffers the first battery cell group 301 and the second battery cell group 401, and also provides a more effective cooling effect for the first battery cell 30 and the second battery cell 40 in the first battery cell group 301 and the second battery cell group 401.

[0122] Referring to Figure 9, in some embodiments, in the first direction X, the battery 100 further includes a liquid cooling structure 60, which is disposed between two adjacent spaced first straight portions 31, two adjacent spaced first bent portions 32 and second bent portions 42, and two adjacent spaced second straight portions 41.

[0123] Optionally, the liquid cooling structure 60 includes, but is not limited to, liquid cooling plates, liquid cooling pipes, and other heat dissipation structures through which coolant flows.

[0124] With this configuration, the liquid cooling structure 60 is arranged between two adjacent spaced first straight portions 31, two adjacent spaced first bent portions 32 and second bent portions 42, and two adjacent spaced second straight portions 41; thus, the liquid cooling structure 60 can perform heat exchange and heat dissipation in the larger area of ​​the first straight portions 31 and the second straight portions 41, so as to effectively improve the cooling effect.

[0125] Referring 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 housing 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 housing 10.

[0126] Understandably, in the second direction Y, adjacent first battery cell groups 301 and second battery cell groups 401 can be arranged in a staggered manner along the first direction X, that is, at least a portion of the first bent 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 least a portion of the second bent portion 42 of the second battery cell 40 in the second battery cell group 401 can be disposed in the first gap 33.

[0127] Therefore, 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, thus forming a fourth gap 80 between the second battery cell group 401 and the inner wall surface of the housing 10; and / or, if the second battery cell group 401 extends beyond the range of the first battery cell group 301, then forming a third gap 70 between the first battery cell group 301 and the inner wall surface of the housing 10.

[0128] For example, in some embodiments, in the first direction X, the first battery cell group 301 and the second battery cell group 401 are arranged in the same number of rows. The first bending portion 32 in the first battery cell group 301 is disposed in the second gap 43, and the second bending portion 42 in the second battery cell group 401 is disposed in the first gap 33. At this time, one side of the first battery cell group 301 extends into the range of the second battery cell group 401 in the first direction X, and the other side of the second battery cell group 401 in the first direction X extends into the range of the first battery cell group 301. Thus, on one side of the first direction X, a third gap 70 is formed between the first battery cell group 301 and the inner wall of the housing 10, and on the other side of the first direction X, a fourth gap 80 is formed between the second battery cell group 401 and the inner wall of the housing 10.

[0129] With this configuration, 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 receiving cavity 101.

[0130] It should be understood that in order to improve the overall space utilization of the receiving cavity 101 inside the housing 10, the number of individual cells in the first row of battery 100 and the second row of battery 100 can be increased, so that the housing 10 can save more space in the second direction Y, thereby filling the space wasted by the third gap 70 and the fourth gap 80 in the first direction X, and thus effectively improving the overall space utilization of the receiving cavity 101.

[0131] Referring 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, internal pressure sensor, and pressure sensor are not shown in the figure), which are disposed in the third gap 70 and / or the fourth gap 80.

[0132] By arranging at least one of the temperature sensor, internal pressure sensor, and pressure sensor in the third gap 70 and / or the fourth gap 80, the space within the receiving cavity 101 can be utilized more efficiently, thereby improving the space utilization rate within the receiving cavity 101.

[0133] Referring to Figure 9, in some embodiments, the housing 10 is also provided with a pressure relief mechanism (not shown in the figure), which is located at the third gap 70 and / or the fourth gap 80.

[0134] Optionally, the pressure relief mechanism includes, but is not limited to, hydraulic valves, explosion-proof valves, etc. The pressure relief mechanism is installed on the housing 10. When thermal runaway occurs, the pressure relief mechanism can connect the receiving cavity 101 to the outside, so that the thermal runaway gas generated inside can be discharged and relieved from the pressure relief mechanism.

[0135] With this configuration, the pressure relief mechanism is placed on the housing 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 large space for the flow and discharge of thermal runaway gas, thereby enabling directional pressure relief at the third gap 70 and / or the fourth gap 80 using the pressure relief mechanism.

[0136] Referring 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.

[0137] The first electrical connection structure 91 includes, but is not limited to, conductive metal connection structures such as copper connecting pieces, aluminum connecting pieces, silver connecting pieces, and gold connecting pieces. In any column of first battery cell groups 301, two adjacent first battery cells 30 are connected through the first electrical connection structure 91. For example, the electrical connection terminals of two adjacent first battery cells 30 are contacted and connected through the first electrical connection structure 91 to achieve electrical connection between the two first battery cells 30.

[0138] The second electrical connection structure 92 includes, but is not limited to, conductive metal connection structures such as copper connecting pieces, aluminum connecting pieces, silver connecting pieces, and gold connecting pieces. In any column of second battery cell groups 401, two adjacent second battery cells 40 are connected through the second electrical connection structure 92. For example, the electrical connection terminals of two adjacent second battery cells 40 are contacted and connected through the second electrical connection structure 92 to achieve electrical connection between the two second battery cells 40.

[0139] The third electrical connection structure 93 includes, but is not limited to, conductive metal connection structures such as copper connecting pieces, aluminum connecting pieces, silver connecting pieces, and gold connecting pieces. When at least a portion of the second bend 42 of the second battery cell 40 is disposed in the first gap 33, the two first battery cells 30 forming the first gap 33 are disposed adjacent to the second battery cell 40. The third electrical connection structure 93 can connect one of the first battery cells 30 and an adjacent second battery cell 40 in an adjacent column of second-row battery cells 100, thereby achieving an electrical connection between the first battery cell group 301 and the second battery cell group 401.

[0140] For example, the third electrical connection structure 93 may be, but is not limited to, various configurations such as an inclined electrical connection piece or an L-shaped electrical connection piece.

[0141] With this configuration, the first battery cell 30 in the first battery cell group 301 is connected using the first electrical connection structure 91, the second battery cell 40 in the second battery cell group 401 is connected using the second electrical connection structure 92, and the first battery cell 30 and the adjacent second battery cell 40 are connected using the third electrical connection structure 93.

[0142] The battery 100 of this application will now be described in detail according to specific embodiments.

[0143] Referring to Figures 4 to 10, in this embodiment, the battery 100 includes a housing 10, a first battery cell 30, and a second battery cell 40. The housing 10 has a receiving cavity 101 inside. A plurality of first battery cells 30 are arranged sequentially along the first direction X to form a first battery cell group 301. A plurality of second battery cells 40 are arranged sequentially along the first direction X to form a second battery cell group 401. The first battery cell group 301 and the second battery cell group 401 are arranged alternately along the second direction Y.

[0144] The first battery cell 30 includes a first straight portion 31 and first bent portions 32 connected to opposite ends of the first straight portion 31 along a second direction Y. A first gap 33 is formed between adjacent first bent portions 32 in the first direction X. The second battery cell 40 includes a second straight portion 41 and second bent portions 42 connected to opposite ends of the second straight portion 41 along a second direction Y. A second gap 43 is formed between adjacent second bent portions 42 in the first direction X.

[0145] In the second direction Y, a portion of the first bending portion 32 can be disposed in the second gap 43, and a portion 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, so the size of the housing 10 in the second direction Y is effectively reduced.

[0146] Referring to Figures 1 to 3, in a second aspect, embodiments of this application also provide an electrical device, including a battery 100 as described above, the battery 100 being used to provide electrical energy.

[0147] The electrical equipment provided in this application embodiment, such as the vehicle 1000 mentioned above, includes the battery 100 mentioned above. With the size of the battery 100 reduced, the reserved space for accommodating the battery 100 in the electrical equipment is also effectively reduced.

[0148] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery, characterized by: The battery comprises a box body, an accommodating cavity is formed in the interior of the box body; a plurality of first battery cells are arranged in sequence along a first direction and form a first battery cell group, the first battery cell comprises a first flat portion and a first bending portion connected to at least one end of the first flat portion along a second direction, the first direction is perpendicular to the second direction; in the first direction, a first gap is formed between the first bending portions of two adjacent first battery cells; and a second battery cell, in the second direction, the second battery cell is arranged on at least one side of the first battery cell group, and part of the second battery cell is arranged in the first gap.

2. The battery of claim 1, wherein: A plurality of second battery cells are arranged in sequence along the first direction and 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 part of the second battery cells in the second battery cell group are arranged in the corresponding first gap.

3. The battery of claim 2, wherein: The second battery cell is a cylindrical battery cell.

4. The battery of claim 2, wherein: The second battery cell comprises a second flat portion and a second bending portion connected to at least one end of the second flat portion along the second direction, at least part of the second bending portion is arranged in the first gap; in the first direction, a second gap is formed between two adjacent second bending portions; at least part of the first bending portion is arranged in the second gap formed by adjacent second battery cell groups.

5. The battery of claim 4, wherein: In the first direction, at least two adjacent first flat portions are in contact; and / or, in the first direction, at least two adjacent second flat portions are in contact.

6. The battery of claim 4 or 5, wherein: 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.

7. The battery of claim 6, wherein: The battery further comprises a buffer structure, in the first direction, the buffer structure is arranged between two adjacent first flat portions which are spaced apart; and / or, in the first direction, the buffer structure is arranged between two adjacent second flat portions which are spaced apart.

8. The battery of any one of claims 4 to 7, wherein: The second bending portion abuts at least one first bending portion at the same first gap.

9. The battery of any one of claims 4 to 7, wherein: The second bending portion is spaced apart from at least one first bending portion at the same first gap.

10. The battery of claim 1 or 2, wherein: The second battery cell abuts at least one first bending portion at the same first gap.

11. The battery of claim 1 or 2, wherein: The second battery cell is spaced apart from at least one first bending portion at the same first gap.

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

13. The battery of claim 12, wherein: The battery further comprises a liquid cooling structure, which is arranged between two spaced apart first flat portions, two spaced apart first bending portions and the second bending portion, and two spaced apart second flat portions.

14. The battery of claim 2, wherein: One side of the first battery monomer group in the first direction forms a third gap between the inner wall surface of the box; and / or, the other side of the second battery monomer group in the first direction forms a fourth gap between the inner wall surface of the box.

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

16. The battery of claim 14 or 15, wherein: The box is further provided with a pressure relief mechanism, which is located at the third gap and / or the fourth gap.

17. The battery of claim 2, wherein: Two adjacent first battery monomers are connected through a first electrical connection structure, two adjacent second battery monomers are connected through a second electrical connection structure, and the first battery monomer and the adjacent second battery monomer are connected through a third electrical connection structure.

18. An electrical device, characterized by: The battery as claimed in any one of claims 1 to 17 is used to provide electric energy.

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