Battery and electric equipment

Abstract

The embodiment of the invention provides a battery and electric equipment. The battery cell includes: a case including a structural member; the single battery is contained in the box body, the single battery is provided with a first wall facing the structural part, the first wall is provided with at least one protruding structure, and the protruding structure protrudes in the direction away from the interior of the single battery; wherein the structural member comprises a concave structure, and at least part of the concave structure is accommodated in the concave structure, so that the structural strength of the battery can be improved.

Description

Batteries and electrical devices Technical Field

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

[0002] With the increasing severity of environmental pollution, the new energy industry is attracting more and more attention. In the new energy industry, battery technology is a key factor in its development. Currently, with the rapid development of the new energy industry, cell-to-pack (CTP) technology has been widely used due to its advantages such as simple structure and simple installation process. However, by directly fixing the battery cells in the battery pack, the battery loses the protection at the module level, which can easily reduce the structural strength of the battery. Therefore, in this field, how to improve the structural strength and stability of batteries has become a technical problem that needs to be solved urgently.

[0003] Summary of the Invention

[0004] The present application provides a battery and an electrical device, which can improve the structural strength of the battery.

[0005] In a first aspect, a battery is provided, comprising: a housing including a structural member; a battery cell accommodated in the housing, the battery cell having a first wall facing the structural member, the first wall being provided with at least one protrusion structure, the protrusion structure protruding in a direction away from the interior of the battery cell; wherein the structural member includes a recessed structure, at least a portion of the recessed structure being accommodated in the recessed structure.

[0006] In an embodiment of the present application, at least one protruding structure is provided on the first wall of the battery cell facing the structural member, and the protruding structure protrudes in a direction away from the interior of the battery cell, and at least a portion of the protruding structure is accommodated in the recessed structure. This can effectively reduce the shaking and falling off of the battery cell during movement, enhance the stability of the battery, and improve the structural strength of the battery.

[0007] In some embodiments, a groove corresponding to the protruding structure is provided on a side of the first wall facing the interior of the battery cell.

[0008] In an embodiment of the present application, a groove corresponding to the protruding structure is provided on the side of the first wall facing the interior of the battery cell. On the one hand, the groove can accommodate more battery active materials to improve the energy density of the battery. On the other hand, the groove can accommodate more electrolyte to slow down the decomposition or volatilization of the electrolyte in the battery cell and improve the cycle life of the battery cell.

[0009] In some embodiments, the protrusion is accommodated in the recess. Thus, in the embodiment of the present application, by accommodating the protrusion on the first wall of the battery cell in the recess of the structural member, the strength of the battery can be further improved to reduce the risk of the battery cell sliding or falling off during movement.

[0010] In some embodiments, the protruding structure is connected to the recessed structure. Thus, by connecting the protruding structure on the first wall of the battery cell with the recessed structure of the structural member, damage to the battery can be reduced when the battery is subjected to external impact, thereby improving the structural strength of the battery.

[0011] In some embodiments, the first wall is opposite to or connected to the second wall of the battery cell, wherein the second wall is provided with an electrode terminal. Thus, in the embodiments of the present application, by providing the protruding structure on the wall opposite to or connected to the second wall of the battery cell, the impact of the battery on the electrode terminal during use can be reduced.

[0012] In some embodiments, a protrusion structure is provided on the first wall, and a dimension D1 of the groove in the first direction and a dimension D2 of the first wall in the first direction satisfy: 0.1≤D1 / D2≤0.95, and the first direction is parallel to the first wall.

[0013] In an embodiment of the present application, when a protruding structure is provided on the first wall of the battery cell, when the ratio between the dimension D1 of the groove in the first direction and the dimension D2 of the first wall in the first direction is less than 0.1, the dimension D1 of the groove in the first direction is small or the dimension D2 of the first wall in the first direction is large, so that the amount of battery active material and electrolyte that can be accommodated by the groove is small, which makes it difficult to meet the requirements of high energy density batteries. At the same time, when the dimension D1 of the groove in the first direction is small, the strength of the battery cell is reduced, and it is easy to cause shaking and falling off during the movement of the battery cell; when the ratio between the dimension D1 of the groove in the first direction and the dimension D2 of the first wall in the first direction is greater than 0.95, the dimension D1 of the groove in the first direction is large or the dimension D1 of the first wall in the first direction is small, which easily leads to the presence of excessive electrolyte and battery active material in the battery cell, which easily leads to a relatively increase in side reactions in the battery cell, generating more gas, and affecting the cycle life of the battery. By setting the relationship between the dimension D1 of the groove in the first direction and the dimension D2 of the first wall in the first direction to be: 0.1≤D1 / D2≤0.95, the energy density and cycle life of the battery can be improved.

[0014] In some embodiments, the first wall is provided with a protruding structure, and a dimension D1 of the groove in the first direction and a dimension D2 of the first wall in the first direction satisfy the following relationship: 0.3 ≤ D1 / D2 ≤ 0.7, and the first direction is parallel to the first wall. This can further improve the energy density and cycle life of the battery.

[0015] In some embodiments, a dimension H1 of the groove in the second direction and a dimension H2 of the third wall of the battery cell in the second direction satisfy: 0.01≤H1 / H2≤0.3, the second direction is perpendicular to the first wall, and the third wall is parallel to the second direction.

[0016] In the embodiments of the present application, when the ratio between the dimension H1 of the groove in the second direction and the dimension H2 of the third wall of the battery cell in the second direction is less than 0.01, i.e., the dimension H1 of the groove in the second direction is small or the dimension H2 of the third wall of the battery cell in the second direction is large, the amount of battery active material and electrolyte that can be accommodated by the groove is small, making it difficult to meet the requirements of a high-energy-density battery. When the ratio between the dimension H1 of the groove in the second direction and the dimension H2 of the third wall of the battery cell in the second direction is greater than 0.3, i.e., the dimension H1 of the groove in the second direction is large or the dimension H2 of the third wall of the battery cell in the second direction is small, the groove can accommodate excessive battery active material and electrolyte, which can easily lead to excessive electrolyte and battery active material in the battery cell, thereby increasing side reactions in the battery cell and generating a large amount of gas, which can affect the battery's cycle life. Therefore, by setting the relationship between the dimension H1 of the groove in the second direction and the dimension H2 of the third wall of the battery cell in the second direction to: 0.01 ≤ H1 / H2 ≤ 0.3, the battery's energy density and cycle life can be improved.

[0017] In some embodiments, the dimension H1 of the groove in the second direction and the dimension H2 of the third wall of the battery cell in the second direction satisfy the following relationship: 0.02≤H1 / H2≤0.2, the second direction is perpendicular to the first wall, and the third wall is parallel to the second direction. This can further improve the energy density and cycle life of the battery.

[0018] In some embodiments, a thickness H3 of the first wall and a dimension H1 of the groove in a second direction satisfy: 0.05≤H3 / H1≤2, and the second direction is perpendicular to the first wall.

[0019] In the embodiments of the present application, when the ratio of the first wall thickness H3 to the recess dimension H1 in the second direction is less than 0.005, the first wall thickness H3 is small or the recess dimension H1 in the second direction is large. When the first wall thickness H3 is small, the battery cell has weak impact resistance and is prone to rupture during use, leading to leakage of electrolyte or active materials, thereby affecting battery performance. When the recess dimension H1 in the second direction is large, excessive electrolyte and active materials are likely to remain in the battery cell, increasing side reactions within the battery cell and generating a large amount of gas, thus affecting the battery's cycle life. When the ratio of the first wall thickness H3 to the recess dimension H1 in the second direction is greater than 2, the first wall thickness H3 is large or the recess dimension H1 in the second direction is small. Consequently, the recess can accommodate a small amount of active materials and electrolyte, making it difficult to meet the requirements of high-energy-density batteries. Therefore, in the embodiment of the present application, by setting the relationship between the wall thickness H3 of the first wall and the dimension H1 of the groove in the second direction to: 0.005≤H3 / H1≤2, the energy density and cycle life of the battery can be improved.

[0020] In some embodiments, the thickness H3 of the first wall and the dimension H1 of the groove in the second direction satisfy: 0.01≤H3 / H1≤0.7, and the second direction is perpendicular to the first wall. This can further improve the energy density and cycle life of the battery.

[0021] In some embodiments, the first wall is provided with a plurality of such protrusions, which are spaced apart on the first wall. Thus, by providing a plurality of protrusions on the first wall of a battery cell, spaced apart on the first wall, and accommodating the plurality of protrusions in a recessed structure, the strength of the battery can be increased, thereby reducing the risk of the battery cell slipping or falling off during movement.

[0022] In some embodiments, the protrusion structure is an asymmetric structure. Thus, in the embodiment of the present application, by setting the protrusion structure on the first wall of the battery cell to an asymmetric structure, it is helpful to reduce the risk of installing the battery upside down, so as to facilitate the installation and removal of the battery cell.

[0023] In some embodiments, the protruding structure is integrally formed with the first wall. Thus, in the embodiment of the present application, the protruding structure on the first wall of the battery cell is integrally formed with the first wall to facilitate the efficiency of processing and assembly of the battery cell.

[0024] In some embodiments, the battery cell is bonded to the housing. Thus, in the embodiments of the present application, the battery cell can be bonded to the housing by an adhesive without damaging the first wall of the battery cell. This fixing method is simple and reliable, which helps reduce processing costs.

[0025] In some embodiments, the structural member is a box wall.

[0026] In some embodiments, the housing includes a thermal management component, and the structural member is at least a part of the thermal management component.

[0027] In some embodiments, the structural member is at least part of a beam of the box.

[0028] In a second aspect, an electrical device is provided, comprising: a battery as described in any one of the above embodiments, wherein the battery is used to provide electrical energy to the electrical device.

[0029] In some embodiments, the electrical equipment may be a vehicle, a ship, or a spacecraft. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0031] FIG1 is a schematic structural diagram of a vehicle provided in one embodiment of the present application;

[0032] FIG2 is a schematic structural diagram of a battery provided in one embodiment of the present application;

[0033] FIG3 is a schematic structural diagram of a battery cell according to an embodiment of the present application;

[0034] FIG4 is a schematic cross-sectional view of a battery cell according to an embodiment of the present application;

[0035] FIG5 is a cross-sectional schematic diagram of another battery cell provided in one embodiment of the present application;

[0036] FIG6 is a schematic diagram of a cross section of a battery provided in one embodiment of the present application;

[0037] FIG7 is an enlarged structural diagram of part A in FIG6 of the present application;

[0038] FIG8 is a schematic diagram of a cross section of another battery provided in one embodiment of the present application;

[0039] FIG9 is a schematic diagram of a cross section of another battery provided in one embodiment of the present application;

[0040] In the drawings, the drawings are not drawn to scale. DETAILED DESCRIPTION

[0041] The following detailed description of the embodiments of the present application is provided in conjunction with the accompanying drawings and examples. The following detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of the present application, but are not intended to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0043] In the description of the embodiments of this application, the technical terms "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application,

[0044] "Multiple" means two or more, unless otherwise clearly defined.

[0045] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0046] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0047] It should be understood that in the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0048] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0049] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0050] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

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

[0052] The battery in the embodiments of this application refers to a physical module that includes one or more battery cells to provide electrical energy. For example, the battery referred to in this application may include a battery module or a battery pack. A battery generally includes a housing that encloses one or more battery cells. The housing can reduce the effects of liquids or other foreign matter on the charging or discharging of the battery cells.

[0053] In some possible embodiments, the battery cell in the embodiment of the present application may be a metal battery. Specifically, the metal battery may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., which is not limited in the embodiment of the present application. Generally, a battery cell may also be referred to as a battery cell. The battery cell in the embodiment of the present application may be cylindrical, flat, rectangular, or other regular or irregular shapes. The technical solutions of the embodiment of the present application can be applied to battery cells of any shape.

[0054] The battery cell in the embodiments of the present application includes an electrode assembly and an electrolyte. The electrode assembly consists of a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive electrode current collector. The current collector not coated with the positive active material layer protrudes from the current collector coated with the positive active material layer, and the current collector not coated with the positive active material layer serves as the positive electrode tab. Taking a lithium-ion battery as an example, the positive electrode current collector can be made of aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, among others. The negative electrode sheet includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative electrode current collector. The current collector not coated with the negative active material layer protrudes from the current collector coated with the negative active material layer, and the current collector not coated with the negative active material layer serves as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be carbon or silicon, among others.

[0055] It should be understood that the positive electrode active material layer in the embodiment of the present application may also be referred to as a positive electrode functional coating, and the negative electrode active material layer may also be referred to as a negative electrode functional coating, as examples, and the embodiment of the present application does not limit this.

[0056] To ensure that high currents can pass without melting, the positive electrode tabs are multiple and stacked together, and the negative electrode tabs are multiple and stacked together. It should be understood that the material of the separator in the embodiment of the present application can be, for example, polypropylene (PP) or polyethylene (PE). In addition, the electrode assembly in the embodiment of the present application can be a wound structure or a laminated structure, which is not limited in the embodiment of the present application.

[0057] In order to meet different power requirements, the battery in the embodiment of the present application may include multiple battery cells, wherein the multiple battery cells can be connected in series, in parallel, or in hybrid connection, and hybrid connection refers to a mixture of series and parallel connection. Optionally, multiple battery cells can first be connected in series, in parallel, or in hybrid connection to form a battery module, and multiple battery modules can then be connected in series, in parallel, or in hybrid connection to form a battery. In other words, multiple battery cells can directly form a battery, or they can first form a battery module, and the battery module can then form a battery. The battery is further arranged in an electrical device to provide electrical energy to the electrical device.

[0058] With the rapid development of the new energy industry, various industries have put forward higher demands on the energy density and processing costs of batteries. CTP technology has emerged as the times require. This technology omits or reduces the number of modules and directly arranges the battery cells in the battery pack to improve space utilization, simplify the installation process, and save production costs. However, the inventors of this application found that by directly fixing the battery cells in the battery pack, the battery loses the protection at the module level. When the battery is subjected to external impact, the battery cells will directly bear the impact of the collision, which can easily reduce the structural strength of the battery and reduce the safety of the battery pack. Therefore, how to improve the structural strength and stability of batteries has become a technical problem that needs to be solved urgently in this field.

[0059] In view of this, the present application provides a battery comprising: a housing including a structural member; a battery cell housed within the housing, the battery cell having a first wall facing the structural member, the first wall being provided with at least one protrusion protruding in a direction away from the interior of the battery cell; wherein the structural member includes a recessed structure, at least a portion of which is housed within the recessed structure. Thus, by providing at least one protrusion on the first wall of the battery cell facing the structural member, the protrusion protruding in a direction away from the interior of the battery cell, and at least a portion of the protrusion being housed within the recessed structure, the battery cell can be effectively reduced from shaking or falling off during movement, thereby enhancing the stability of the battery and improving its structural strength.

[0060] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use batteries.

[0061] Electrical equipment can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles. New energy vehicles can be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc. Spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc. Electric tools include metal cutting tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. This application does not impose any special restrictions on the above-mentioned electrical equipment.

[0062] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the electrical equipment described above, but can also be applied to all devices that use batteries. For the sake of simplicity, the following embodiments are described in detail using the electrical equipment as a vehicle as an example.

[0063] For example, as shown in FIG1 , which is a structural diagram of a vehicle 1 provided in an embodiment of the present application, the vehicle 1 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A motor 40, a controller 30 and a battery 10 may be provided inside the vehicle 1, and the controller 30 is used to control the battery 10 to supply power to the motor 40. For example, a battery 10 may be provided at the bottom, front or rear of the vehicle 1. The battery 10 may be used to power the vehicle 1, for example, the battery 10 may be used as an operating power source for the vehicle 1, for the circuit system of the vehicle 1, for example, for the working power requirements during the start-up, navigation and operation of the vehicle 1. In another embodiment of the present application, the battery 10 may not only be used as an operating power source for the vehicle 1, but also as a driving power source for the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0064] In order to meet different power usage requirements, the battery 10 in the embodiment of the present application can be a battery cell group or a battery pack. The battery 10 may include at least one battery cell group, and the battery cell group includes a plurality of battery cells, wherein the plurality of battery cells can be electrically connected in series, in parallel, or in mixed connection to form a battery 10, wherein mixed connection refers to a mixture of series and parallel connection. The battery 10 can also be referred to as a battery pack. For example, a plurality of battery cells can first be connected in series, in parallel, or in mixed connection to form a battery module, and a plurality of battery modules can then be connected in series, in parallel, or in mixed connection to form a battery 10. In other words, a plurality of battery cells can directly form a battery 10, or they can first be formed into a battery module, and then the battery modules can be formed into a battery 10.

[0065] To meet different power requirements, the battery 10 may include multiple battery cells. For example, FIG2 is a schematic diagram of the structure of a battery 10 according to one embodiment of the present application. The battery 10 may include multiple battery cells 20. The battery 10 may also include a housing 11 having a hollow interior and housing the multiple battery cells 20. For example, the multiple battery cells 20 may be connected in parallel, in series, or in a mixed combination and then placed in the housing 11.

[0066] Optionally, the battery 10 may also include other structures, which will not be described in detail here. For example, the battery 10 may also include a busbar component, which is used to achieve electrical connection between multiple battery cells 20, such as parallel connection, series connection, or mixed connection. Specifically, the busbar component can achieve electrical connection between the battery cells 20 by connecting the electrode terminals of the battery cells 20. Furthermore, the busbar component can be fixed to the electrode terminals of the battery cells 20 by welding. The electrical energy of the multiple battery cells 20 can be further led out through the box through a conductive mechanism. Optionally, the conductive mechanism may also belong to the busbar component.

[0067] The number of battery cells 20 can be set to any value based on different power requirements. Multiple battery cells 20 can be connected in series, parallel, or in a hybrid manner to achieve higher capacity or power. Since each battery 10 may include a large number of battery cells 20, for ease of installation, the battery cells 20 can be grouped, with each group of battery cells 20 forming a battery module. The number of battery cells 20 included in a battery module is not limited and can be set according to requirements. A battery can include multiple battery modules, which can be connected in series, parallel, or in a hybrid manner.

[0068] As shown in FIG3 , it is a schematic structural diagram of a battery cell 20 according to an embodiment of the present application. The battery cell 20 includes one or more electrode assemblies 22, a shell 211 and a cover plate 212. The shell 211 and the cover plate 212 form an outer shell or battery box 21. The walls of the shell 211 and the cover plate 212 are both referred to as the walls of the battery cell 20. For a rectangular battery cell 20, the walls of the shell 211 include a bottom wall and four side walls. The shell 211 is determined according to the shape of the one or more electrode assemblies 22 after combination. For example, the shell 211 can be a hollow cuboid, cube or cylinder, and one of the faces of the shell 211 has an opening so that one or more electrode assemblies 22 can be placed in the shell 211. For example, when the shell 211 is a hollow cuboid or cube, one of the planes of the shell 211 is an open surface, that is, the plane does not have a wall, so that the inside and outside of the shell 211 are connected. When the housing 211 is a hollow cylinder, the end surface of the housing 211 is an open surface, that is, the end surface has no wall, so that the inside and outside of the housing 211 are connected. The cover plate 212 covers the opening and is connected to the housing 211 to form a closed cavity for accommodating the electrode assembly 22. The housing 211 is filled with an electrolyte, such as an electrolyte solution.

[0069] The battery cell 20 may also include two electrode terminals 214, which may be disposed on the cover plate 212. The cover plate 212 is typically flat, with the two electrode terminals 214 secured to the flat surface of the cover plate 212. The two electrode terminals 214 are respectively a positive electrode terminal 214a and a negative electrode terminal 214b. Each electrode terminal 214 is provided with a corresponding connecting member 23, also known as a current collecting member 23, which is located between the cover plate 212 and the electrode assembly 22 and electrically connects the electrode assembly 22 to the electrode terminals 214.

[0070] As shown in FIG3 , each electrode assembly 22 has a first electrode tab 221a and a second electrode tab 222a. The polarity of the first electrode tab 221a and the second electrode tab 222a are opposite. For example, when the first electrode tab 221a is a positive electrode tab, the second electrode tab 222a is a negative electrode tab. The first electrode tab 221a of one or more electrode assemblies 22 is connected to one electrode terminal via a connecting member 23, and the second electrode tab 222a of one or more electrode assemblies 22 is connected to another electrode terminal via another connecting member 23. For example, the positive electrode terminal 214a is connected to the positive electrode tab via one connecting member 23, and the negative electrode terminal 214b is connected to the negative electrode tab via another connecting member 23.

[0071] In the battery cell 20 , the electrode assembly 22 can be provided as a single one or multiple ones according to actual use requirements. As shown in FIG3 , four independent electrode assemblies 22 are provided in the battery cell 20 .

[0072] A pressure relief mechanism 213 may also be provided on the battery cell 20. The pressure relief mechanism 213 is used to be activated to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold value.

[0073] The pressure relief mechanism 213 may be of various possible pressure relief structures, which are not limited in the present embodiment. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to melt when the internal temperature of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold; and / or the pressure relief mechanism 213 may be a pressure-sensitive pressure relief mechanism configured to rupture when the internal pressure of the battery cell 20 equipped with the pressure relief mechanism 213 reaches a threshold.

[0074] Figure 4 shows a schematic cross-sectional view of a battery cell 20 provided in one embodiment of the present application. Figure 5 shows a schematic cross-sectional view of another battery cell 20 provided in one embodiment of the present application. Figure 6 shows a schematic cross-sectional view of a battery 10 provided in one embodiment of the present application. Figure 7 shows an enlarged structural schematic view of section A in Figure 6 of the present application. Figure 8 shows a schematic cross-sectional view of another battery 10 provided in one embodiment of the present application. Figure 9 shows a schematic cross-sectional view of yet another battery 10 provided in one embodiment of the present application.

[0075] In some possible implementations, as shown in Figure 4, the battery 10 in the embodiment of the present application includes: a case 11, including a structural member 24; a battery cell 20, accommodated in the case 11, the battery cell 20 having a first wall 25 arranged facing the structural member 24, and at least one protrusion structure 26 is provided on the first wall 25, and the protrusion structure 26 protrudes in a direction away from the interior of the battery cell 20; wherein, the structural member 24 includes a recessed structure 27, and at least a portion of the protrusion structure 26 is accommodated in the recessed structure 27.

[0076] It should be understood that the shape of the housing 11 of the battery 10 in the embodiment of the present application can be set according to actual applications. For example, the housing 11 of the battery 10 can be a polyhedron structure, and the polyhedron structure can be formed by multiple walls. Therefore, the housing 11 of the battery 10 can include multiple walls.

[0077] Thus, in the embodiment of the present application, at least one protruding structure 26 is provided on the first wall 25 of the battery cell 20 facing the structural member 24, and the protruding structure 26 protrudes in a direction away from the interior of the battery cell 20, and at least a portion of the protruding structure 26 is accommodated in the recessed structure 27, which can effectively reduce the shaking and falling off of the battery cell 20 during movement, enhance the stability of the battery 10, and improve the structural strength of the battery 10.

[0078] In some possible implementations, as shown in Figures 4 to 9, a groove 28 corresponding to the protrusion 26 is provided on the side of the first wall 25 facing the interior of the battery cell 20. Thus, in the embodiment of the present application, by providing the groove 28 corresponding to the protrusion 26 on the side of the first wall 25 facing the interior of the battery cell 20, on the one hand, the groove 28 can accommodate more battery active material to increase the energy density of the battery 10, and on the other hand, the groove 28 can accommodate more electrolyte to slow down the decomposition or volatilization of the electrolyte in the battery cell 20, thereby increasing the cycle life of the battery cell 20.

[0079] In one possible implementation, the shapes of the protruding structure 26 in the embodiment of the present application and the groove 28 formed along the side of the protruding structure 26 away from the interior of the battery cell 20 can be set according to actual needs. For example, the shapes of the protruding structure 26 and the groove 28 in the embodiment of the present application can be cylinders, cuboids, cubes or other shapes, etc., and the embodiment of the present application is not limited to this.

[0080] It should be understood that the corners of the protrusion structure 26 protruding in a direction away from the interior of the battery cell 20 and the bottom corners of the groove 28 corresponding to the protrusion structure 26 in the embodiment of the present application can be configured according to actual needs. For example, they can be configured as circular, arc-shaped, or polygonal, etc., as examples, and the embodiment of the present application is not limited to this. It should also be understood that the shapes of the corners of the protrusion structure 26 and the bottom corners of the groove 28 corresponding to the protrusion structure 26 can be the same or different.

[0081] It should also be understood that the corner shape of the recessed structure 27 used to accommodate at least a portion of the raised structure 26 in the embodiment of the present application can be set according to actual needs. For example, it can be set to a circular, arc-shaped, or polygonal shape, etc., as an example, and the embodiment of the present application is not limited to this. Specifically, the shape of the corner of the recessed structure 27 can be the same as or different from the shape of the corner of the raised structure 26 in the embodiment of the present application.

[0082] In one possible implementation, as shown in FIG5 , the protruding structure 26 is accommodated in the recessed structure 27. Thus, in the embodiment of the present application, by accommodating the protruding structure 27 on the first wall 25 of the battery cell 20 in the recessed structure 27 of the structural member 24, the structural strength of the battery 10 can be further improved, thereby reducing the risk of the battery cell 20 slipping or falling off during movement.

[0083] In one possible implementation, as shown in Figures 5 to 9, the protruding structure 26 is connected to the recessed structure 27. Thus, in the embodiment of the present application, by connecting the protruding structure 26 on the first wall 25 of the battery cell 20 with the recessed structure 27 of the structural member 24, when the battery 10 is subjected to an external impact, damage to the battery 10 can be reduced, the stability of the battery 10 can be enhanced, and the structural strength of the battery 10 can be improved.

[0084] In one possible implementation, the first wall 25 is opposite or connected to the second wall 29 of the battery cell 20, wherein the electrode terminal 214 is disposed on the second wall 29. In the embodiment of the present application, when the raised structure 26 disposed on the side of the first wall 25 facing the interior of the battery cell 20 is on the same wall as the electrode terminal 214 of the battery cell 20, it is likely to have an adverse effect on the electrode terminal 214 of the battery cell 20, thereby affecting the performance of the battery 10. Therefore, by disposing the raised structure 26 on the wall opposite or connected to the second wall 29 of the battery cell 20, the impact of the battery 10 on the electrode terminal 214 during use can be reduced, thereby ensuring the performance of the battery 10.

[0085] In one possible implementation, as shown in Figure 6, a protrusion structure 26 is provided on the first wall 25, and the dimension D1 of the groove 28 in the first direction X and the dimension D2 of the first wall 25 in the first direction X satisfy: 0.1≤D1 / D2≤0.95, and the first direction X is parallel to the first wall 25.

[0086] It should be understood that in the embodiment of the present application, the first direction X may be the arrangement direction of a row of battery cells 20 in the battery 10 , or the battery cells 20 in a row of the battery 10 are arranged along the first direction X, and the first direction X is parallel to the first wall 25 .

[0087] In the embodiment of the present application, when a protruding structure 26 is provided on the first wall 25 of the battery cell 20, when the ratio between the dimension D1 of the groove 28 in the first direction X and the dimension D2 of the first wall 25 in the first direction X is less than 0.1, the dimension D1 of the groove 28 in the first direction X is small or the dimension of the first wall 25 in the first direction X is large, so that the amount of battery active material and electrolyte that can be accommodated in the groove 28 is small, which makes it difficult to meet the requirements of high energy density batteries. At the same time, when the dimension D1 of the groove 28 in the first direction X is small, This reduces the structural strength of the battery cell 20, making it susceptible to shaking and falling off during movement. When the ratio between the dimension D1 of the groove 28 in the first direction X and the dimension D2 of the first wall 25 in the first direction X is greater than 0.95, the larger dimension D1 of the groove 28 in the first direction X or the smaller dimension of the first wall 25 in the first direction X can easily lead to excessive electrolyte and battery active materials in the battery cell 20, which can increase side reactions in the battery cell 20 and generate a large amount of gas, thus affecting the cycle life of the battery 10. Therefore, in the embodiment of the present application, by setting the relationship between the dimension D1 of the groove 28 in the first direction X and the dimension D2 of the first wall 25 in the first direction X to: 0.1 ≤ D1 / D2 ≤ 0.95, the energy density and cycle life of the battery 10 can be significantly improved.

[0088] In view of this, the value of D1 / D2 in the embodiment of the present application should not be set too large or too small. For example, the value of D1 / D2 in the embodiment of the present application may be: 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, etc., or its value is within the range obtained by combining any two of the above values.

[0089] Alternatively, in another possible implementation, in the embodiment of the present application, the dimension D1 of the groove 28 in the first direction X and the dimension D2 of the first wall 25 in the first direction X satisfy the following relationship: 0.3≤D1 / D2≤0.7. Thus, the energy density and cycle life of the battery 10 can be further improved.

[0090] It should be understood that in the embodiment of the present application, the dimension D1 of the groove 28 in the first direction X should not be set too large or too small. In one possible implementation, the dimension D1 of the groove 28 in the first direction X can be in the range of 0.2 cm ≤ D1 ≤ 145 cm.

[0091] Illustratively, the dimension D1 of the groove 28 in the first direction X in the embodiment of the present application can be set to: 0.2 cm, 0.3 cm, 0.4 cm, 0.5 cm, 0.6 cm, 0.7 cm, 0.8 cm, 0.9 cm, 1 cm, 2 cm, 3 cm, 4 cm, 5 cm, 6 cm, 7 cm, 8 cm, 9 cm, 10 cm, 15 cm, 20 cm, 25 cm, 30 cm, 35 cm, 40 cm, 45 cm, 50 cm, 60 cm, 70 cm, 80 cm, 90 cm, 100 cm, 110 cm, 120 cm, 130 cm, 140 cm, 145 cm, or its value is within the range obtained by combining any two of the above values.

[0092] It should also be understood that the dimension D2 of the first wall 25 in the first direction X in the embodiment of the present application should not be set too large or too small. For example, the dimension D2 of the first wall 25 in the first direction X in the embodiment of the present application can be set according to actual use requirements, as an example, and the embodiment of the present application is not limited to this. In one possible implementation, the dimension D2 of the first wall 25 in the first direction X ranges from 2 cm ≤ D2 ≤ 150 cm.

[0093] Illustratively, the dimension D2 of the first wall 25 in the embodiment of the present application in the first direction X can be set to 2 cm, 3 cm, 4 cm, 5 cm, 6 cm, 7 cm, 8 cm, 9 cm, 10 cm, 20 cm, 30 cm, 40 cm, 50 cm, 60 cm, 70 cm, 80 cm, 90 cm, 100 cm, 110 cm, 120 cm, 130 cm, 140 cm, or 150 cm, or its value is within the range obtained by combining any two of the above values.

[0094] It should be understood that in the embodiment of the present application, the dimension D1 of the groove 28 in the first direction X may refer to the average value, maximum value or minimum value of the distances between all points at one end of the groove 28 along the first direction X and the corresponding points at the other end. Correspondingly, the dimension D2 of the first wall 25 in the first direction X may refer to the average value, maximum value or minimum value of the distances between all points at one end of the first wall 25 along the first direction X and the corresponding points at the other end. As an example, the embodiment of the present application is not limited to this. For example, when the dimension D1 of the groove 28 in the first direction X refers to the average value of the distances between all points at one end of the groove 28 along the first direction X and the corresponding points at the other end, the dimension D2 of the first wall 25 in the first direction X refers to the average value of the distances between all points at one end of the first wall 25 along the first direction X and the corresponding points at the other end.

[0095] In one possible implementation, as shown in Figure 6, the dimension H1 of the groove 28 in the second direction Z and the dimension H2 of the third wall 30 of the battery cell 20 in the second direction Z satisfy: 0.01≤H1 / H2≤0.3, the second direction Z is perpendicular to the first wall 25, and the third wall 30 is parallel to the second direction Z.

[0096] In the embodiment of the present application, when the ratio of the dimension H1 of the groove 28 in the second direction Z to the dimension H2 of the third wall 30 of the battery cell 20 in the second direction Z is less than 0.01, i.e., the dimension H1 of the groove 28 in the second direction Z is small or the dimension H2 of the third wall 30 of the battery cell 20 in the second direction Z is large, the amount of battery active material and electrolyte that can be accommodated by the groove 28 is small, which makes it difficult to meet the requirements of a high energy density battery. When the ratio of the dimension H1 of the groove 28 in the second direction Z to the dimension H2 of the third wall 30 of the battery cell 20 in the second direction Z is greater than 0.3, i.e., the dimension H1 of the groove 28 in the second direction Z is large or the dimension H2 of the third wall 30 of the battery cell 20 in the second direction Z is small, the groove 28 can accommodate excessive battery active material and electrolyte, which can easily lead to excessive electrolyte and battery active material in the battery cell 20, thereby increasing side reactions in the battery cell 20 and generating a large amount of gas, which affects the cycle life of the battery 10. Therefore, by setting the relationship between the dimension H1 of the groove 28 in the second direction Z and the dimension H2 of the third wall 30 of the battery cell 20 in the second direction Z to be: 0.01≤H1 / H2≤0.3, the energy density and cycle life of the battery 10 can be improved.

[0097] In view of this, the value of H1 / H2 in the embodiment of the present application should not be set too large or too small. For example, the value of H1 / H2 in the embodiment of the present application may be: 0.01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.13, 0.15, 0.17, 0.19, 0.2, 0.21, 0.23, 0.25, 0.27, 0.3, etc., or its value is within the range obtained by combining any two of the above values.

[0098] Optionally, in one possible implementation, in the embodiment of the present application, the dimension H1 of the groove 28 in the second direction Z and the dimension H2 of the third wall 30 of the battery cell 20 in the second direction Z satisfy the following relationship: 0.05≤H1 / H2≤0.2. This can further improve the energy density and cycle life of the battery 10.

[0099] In some embodiments, as shown in FIG. 7 , the wall thickness H3 of the first wall 25 and the dimension H1 of the groove 28 in the second direction Z satisfy: 0.005≤H3 / H1≤2, and the second direction Z is perpendicular to the first wall 25 .

[0100] In the embodiment of the present application, when the ratio of the thickness H3 of the first wall 25 to the dimension H1 of the groove 28 in the second direction Z is less than 0.005, that is, the thickness H3 of the first wall 25 is small or the dimension H1 of the groove 28 in the second direction Z is large. When the thickness H3 of the first wall 25 is small, the battery cell 20 has weak impact resistance and is prone to rupture during use of the battery 10, resulting in leakage of electrolyte or battery active materials, thereby affecting the performance of the battery 10. When the dimension H1 of the groove 28 in the second direction Z is large, it is likely to result in excessive electrolyte and battery active materials in the battery cell 20, resulting in a relatively large number of side reactions in the battery cell 20, generating more gas, and affecting the cycle life of the battery 10. When the ratio between the thickness H3 of the first wall 25 and the dimension H1 of the groove 28 in the second direction Z is greater than 2, that is, the thickness H3 of the first wall 25 is large or the dimension H1 of the groove 28 in the second direction Z is small, the amount of battery active material and electrolyte that can be accommodated by the groove 28 is small, which makes it difficult to meet the requirements of a high-energy-density battery. Therefore, in the embodiment of the present application, by setting the relationship between the thickness H3 of the first wall 25 and the dimension H1 of the groove 28 in the second direction Z to: 0.005≤H3 / H1≤2, the energy density and cycle life of the battery 10 can be improved.

[0101] In view of this, the value of H3 / H1 in the embodiment of the present application should not be set too large or too small. For example, the value of H3 / H1 in the embodiment of the present application may be: 0.005, 0.007, 0.009, 0.01, 0.03, 0.05, 0.07, 0.09, 0.1, 0.3, 0.5, 0.7, 0.9, 1, 1.2, 1.4, 1.6, 1.8, 2, etc., or its value is within the range obtained by combining any two of the above values.

[0102] Alternatively, in one possible implementation, in the embodiment of the present application, the wall thickness H3 of the first wall 25 and the dimension H1 of the groove 28 in the second direction Z satisfy the following relationship: 0.01≤H3 / H1≤0.7, and the second direction Z is perpendicular to the first wall 25. In this way, the energy density and cycle life of the battery 10 can be further improved.

[0103] It should be understood that in the embodiment of the present application, the value of H1 in the embodiment of the application should not be set too large or too small. Specifically, the dimension H1 of the groove 28 in the second direction Z satisfies 0.2cm≤H1≤5cm, and the second direction Z is perpendicular to the first wall 25. Illustratively, the value of H1 in the embodiments of the present application may be: 0.2 cm, 0.3 cm, 0.4 cm, 0.5 cm, 0.6 cm, 0.7 cm, 0.8 cm, 0.9 cm, 1 cm, 1.1 cm, 1.2 cm, 1.3 cm, 1.4 cm, 1.5 cm, 1.6 cm, 1.7 cm, 1.8 cm, 1.9 cm, 2 cm, 2.4 cm, 2.6 cm, 2.8 cm, 3 cm, 3.2 cm, 3.4 cm, 3.6 cm, 3.8 cm, 4 cm, 4.2 cm, 4.4 cm, 4.6 cm, 4.8 cm, 5 cm, etc., or its value is within the range obtained by combining any two of the above values.

[0104] Optionally, in another possible implementation, in the embodiment of the present application, the dimension H1 of the groove 28 in the second direction Z may be 0.2 cm ≤ H1 ≤ 3 cm.

[0105] In one possible implementation, as shown in FIG8 , a plurality of protruding structures 26 are provided on the first wall 25 , and the plurality of protruding structures 26 are spaced apart on the first wall 25 . Thus, in the embodiment of the present application, by providing a plurality of protruding structures 26 on the first wall 25 of the battery cell 20 , and by spaced apart on the first wall 25 , and by accommodating the plurality of protruding structures 26 in the recessed structures 27 , the structural strength of the battery 10 can be improved, thereby reducing the risk of the battery cell 20 slipping or falling off during movement.

[0106] It should be understood that in the embodiment of the present application, when multiple protrusion structures 26 are provided on the first wall 25, and the multiple protrusion structures 26 are spaced apart on the first wall 25, the distances between the multiple protrusion structures 26 may be the same or different. As an example, the embodiment of the present application does not limit this.

[0107] In one possible implementation, the raised structure 26 provided on the first wall 25 of the battery cell 20 in the embodiment of the present application is an asymmetric structure. Thus, in the embodiment of the present application, by setting the raised structure 26 on the first wall 25 of the battery cell 20 as an asymmetric structure, it is helpful to reduce the risk of the battery 10 being installed upside down, so as to facilitate the installation and removal of the battery cell 20. Figure 9 shows a cross-sectional schematic diagram of the battery 10 provided in an embodiment of the present application. For example, as shown in Figure 9, along the first direction X, the distances between the center position of the first wall 25 of the battery cell 20 at both ends along the first direction X and the two end points of the groove 28 in the battery cell 20 along the first direction X are not equal, so that the battery cell 20 can be installed according to the asymmetric characteristics of the raised structure 26, effectively reducing the risk of the battery cell 20 being installed incorrectly and improving the installation efficiency of the battery 10.

[0108] In one possible implementation, the raised structure 26 in the embodiment of the present application is integrally formed with the first wall 25. Thus, in the embodiment of the present application, the raised structure 26 on the first wall 25 of the battery cell 20 is integrally formed with the first wall 25, so as to improve the efficiency of processing and assembly of the battery cell 20, and at the same time help to reduce the processing cost of the battery 10.

[0109] It should be understood that the battery cell 20 in the embodiment of the present application can be fixed to the housing 11 in a variety of ways. In one possible implementation, the battery cell 20 in the embodiment of the present application is bonded to the housing 11. Thus, in the embodiment of the present application, the battery cell 20 can be bonded to the housing 11 using an adhesive without damaging the surface of the battery cell 20 or the housing 11. This fixing method is simple and reliable, which helps reduce the processing cost of the battery 10. For example, the battery cell 20 can be fixed to the bottom wall of the housing 11 using double-sided tape or structural adhesive.

[0110] It should be understood that the battery cell 20 and the box body 11 in the embodiment of the present application can also be fixed by other means, such as bolt connection, etc., as an example, and the embodiment of the present application is not limited to this.

[0111] In a possible implementation, the structural member 24 in the embodiment of the present application may be at least a portion of the wall of the box body 11 .

[0112] In a possible implementation, the housing 11 in the embodiment of the present application may include a thermal management component, and the structural member 24 may be at least a part of the thermal management component.

[0113] It should be understood that in the embodiment of the present application, the thermal management component is used to regulate the temperature of the battery cell 20. For example, the thermal management component can be used to cool or heat the battery cell 20 to make the temperature of the battery 10 relatively stable, thereby improving the working efficiency of the battery 10.

[0114] Specifically, the thermal management component in the embodiments of the present application can contain a fluid or solid-liquid phase change material to regulate the temperature of the multiple batteries 10. Alternatively, the thermal management component can include a flow channel for containing a fluid or solid-liquid phase change material. The fluid can be a liquid or a gas. The solid-liquid phase change material is initially solid and can become a liquid after absorbing heat. Temperature regulation refers to heating or cooling the multiple battery cells 20. When cooling or lowering the temperature of the battery cells 20, the thermal management component is used to contain a cooling fluid or solid-liquid phase change material to lower the temperature of the multiple battery cells 20. In this case, the thermal management component can also be referred to as a cooling component, cooling system, or cooling plate, and the fluid it contains can also be referred to as a cooling medium or cooling fluid, more specifically, a coolant or cooling gas. Furthermore, the thermal management component in the embodiments of the present application can also be used to heat the multiple battery cells 20, although this is not limited in the embodiments of the present application. Optionally, the fluid can be circulated to achieve better temperature regulation. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air.

[0115] In a possible implementation, the structural member 24 in the embodiment of the present application may be at least a portion of a beam of the box body 11 , and the beam of the box body 11 may be used to support the battery cells 20 .

[0116] Optionally, an embodiment of the present application provides an electric device, comprising the above-mentioned battery 10, wherein the battery 10 is used to provide electric energy to the electric device.

[0117] It should be understood that the relevant parts in the various embodiments of this application can refer to each other and will not be repeated for the sake of brevity.

[0118] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and components may be substituted with equivalents without departing from the scope of the present application. In particular, the various technical features described in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A battery, characterized in that: include: Box body, including structural parts; A battery cell is contained in the box, the battery cell has a first wall disposed facing the structural member, the first wall is provided with at least one protrusion structure, and the protrusion structure protrudes in a direction away from the interior of the battery cell; Wherein, the structural member includes a recessed structure, and at least a portion of the protruding structure is accommodated in the recessed structure.

2. The battery according to claim 1, characterized in that A groove corresponding to the protruding structure is provided on one side of the first wall facing the interior of the battery cell.

3. The battery according to claim 1 or 2, characterized in that: The protruding structure is accommodated in the recessed structure.

4. The battery according to any one of claims 1 to 3, characterized in that The protruding structure is connected to the concave structure.

5. The battery according to any one of claims 1 to 4, characterized in that The first wall is opposite to or connected to the second wall of the battery cell, wherein the second wall is provided with an electrode terminal.

6. The battery according to any one of claims 2 to 5, characterized in that The first wall is provided with a protruding structure, and a dimension D1 of the groove in the first direction and a dimension D2 of the first wall in the first direction satisfy: 0.1≤D1 / D2≤0.95, and the first direction is parallel to the first wall.

7. The battery according to any one of claims 2 to 6, characterized in that The first wall is provided with a protruding structure, and a dimension D1 of the groove in the first direction and a dimension D2 of the first wall in the first direction satisfy: 0.3≤D1 / D2≤0.7, and the first direction is parallel to the first wall.

8. The battery according to any one of claims 2 to 7, characterized in that A dimension H1 of the groove in the second direction and a dimension H2 of the third wall of the battery cell in the second direction satisfy: 0.01≤H1 / H2≤0.3, the second direction is perpendicular to the first wall, and the third wall is parallel to the second direction.

9. The battery according to any one of claims 2 to 8, characterized in that A dimension H1 of the groove in the second direction and a dimension H2 of the third wall of the battery cell in the second direction satisfy: 0.02≤H1 / H2≤0.2, the second direction is perpendicular to the first wall, and the third wall is parallel to the second direction.

10. The battery according to any one of claims 2 to 9, characterized in that The wall thickness H3 of the first wall and the dimension H1 of the groove in the second direction satisfy: 0.005≤H3 / H1≤2, and the second direction is perpendicular to the first wall.

11. The battery according to any one of claims 2 to 10, characterized in that The wall thickness H3 of the first wall and the dimension H1 of the groove in the second direction satisfy: 0.01≤H3 / H1≤0.7, and the second direction is perpendicular to the first wall.

12. The battery according to any one of claims 1 to 11, characterized in that A plurality of the protruding structures are arranged on the first wall, and the plurality of the protruding structures are arranged at intervals on the first wall.

13. The battery according to any one of claims 1 to 12, characterized in that The protruding structure is an asymmetric structure.

14. The battery according to any one of claims 1 to 13, characterized in that The protruding structure is integrally formed with the first wall.

15. The battery according to any one of claims 1 to 14, characterized in that The battery cell is bonded to the box body.

16. The battery according to any one of claims 1 to 15, characterized in that The structural member is the box wall.

17. The battery according to any one of claims 1 to 15, characterized in that The housing includes a heat management component, and the structural member is at least a part of the heat management component.

18. The battery according to any one of claims 1 to 15, characterized in that The structural member is at least a part of a beam of the box body.

19. An electrical equipment, characterized in that: include: The battery according to any one of claims 1 to 18, wherein the battery is used to provide electrical energy to the electrical device.

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