Battery cell, battery and electric device

Abstract

The utility model provides a battery monomer, a battery and a power utilization device. The battery monomer comprises a shell, an electrode assembly and a patch assembly, the shell is provided with a cavity and comprises a first wall, a protrusion is arranged on the side, away from the cavity, of the first wall, a containing groove is defined by the protrusion and the first wall, and the electrode assembly is arranged in the cavity. The patch assembly is arranged on the side, away from the cavity, of the first wall, and at least part of the patch assembly is arranged in the containing groove. According to the battery monomer provided by the embodiment of the invention, the patch assembly is at least arranged in the accommodating groove, so that the distance between the patch assembly and the first wall is reduced, and the stroke capable of playing an insulating role between the patch assembly and the first wall is shortened, thereby reducing the risk of insulation failure of the battery monomer.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to the sustainable development of the automotive industry. Electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the sustainable development of the automotive industry. For electric vehicles, battery technology is a key factor in their development.

[0003] The battery cell is provided with a patch component, which is used to increase the insulation performance of the battery cell. However, in the related art, the structural setting of the patch component makes the battery cell have a higher risk of insulation failure, affecting the reliability of the battery cell. Utility Model Content

[0004] In view of the above problems, the present application provides a battery cell, a battery, and an electrical device, which can reduce the risk of insulation failure of the battery cell and ensure the reliability of the battery cell.

[0005] An embodiment of the present application provides a battery cell comprising a housing, an electrode assembly, and a patch assembly. The housing has a cavity and includes a first wall. A protrusion is provided on a side of the first wall facing away from the cavity. The protrusion and the first wall together form a receiving groove. The electrode assembly is disposed within the cavity. The patch assembly is disposed on a side of the first wall facing away from the cavity, and the patch assembly is at least partially disposed within the receiving groove.

[0006] A battery cell provided in an embodiment of the present application reduces the distance between the patch component and the first wall by configuring the patch component at least in the accommodating groove, shortens the travel between the patch component and the first wall that can play an insulating role, thereby reducing the risk of insulation failure of the battery cell and ensuring the insulation reliability of the battery cell.

[0007] In some embodiments, the patch assembly includes a main body portion, which is at least partially embedded in the receiving groove, and the orthographic projection of the main body portion on the first wall is located in the receiving groove.

[0008] A battery cell provided in an embodiment of the present application is arranged such that the orthographic projection of the main body on the first wall is located in the receiving groove. When the main body is assembled, it can be embedded in the receiving groove. On the basis of shortening the distance between the main body and the first wall, it can also reduce the difficulty of alignment during the assembly of the patch component and simplify the assembly process.

[0009] In some embodiments, the main body includes a first insulating layer, and the first insulating layer is at least partially located in the receiving groove and connected to the first wall.

[0010] The battery cell provided in one embodiment of the present application can facilitate the assembly of the patch component by providing the first insulating layer, simplify the assembly process, and reduce the installation process of the battery cell.

[0011] In some embodiments, the main body includes two or more stacked protective layers, and at least one protective layer is located in the receiving groove.

[0012] A battery cell provided in an embodiment of the present application can provide multi-layer protection for the first wall by setting up two or more protective layers stacked together, which can not only protect the first wall and reduce the probability of wear of the first wall, but also increase the insulation effect of the main body.

[0013] In some embodiments, the two or more protective layers include a patch layer and an adhesive layer, the adhesive layer is located between the patch layer and the first wall, and the adhesive layer is connected to the first wall.

[0014] The battery cell provided in one embodiment of the present application can facilitate the attachment of the patch component to the first wall through the provision of an adhesive layer and a patch layer, thereby simplifying the connection process, ensuring multi-level insulation protection, and improving the connection strength between the patch component and the first wall, thereby reducing the risk of separation of the patch component from the first wall.

[0015] In some embodiments, the main body portion is spaced apart from the orthographic projection of the protrusion on the first wall.

[0016] A battery cell provided in an embodiment of the present application is arranged with an interval between the orthographic projection of the main body on the first wall and the orthographic projection of the protrusion on the first wall, which can reduce the probability of misoperation during assembly of the main body, resulting in the entire body overlapping the protrusion, thereby improving the accuracy of assembly.

[0017] In some embodiments, the patch assembly further includes a peripheral portion, which is arranged around the main body and connected to the main body, and the peripheral portion is arranged on a side of the protrusion away from the first wall and covers the protrusion.

[0018] A battery cell provided in an embodiment of the present application can wrap the protrusion through the provision of the outer portion, thereby increasing protection for the protrusion, reducing the probability of damage to the protrusion, and increasing the insulation effect between the protrusion and the outside of the battery cell.

[0019] In some embodiments, the peripheral portion and at least a portion of the main body are a unitary structure.

[0020] In one embodiment of the present application, a battery cell is provided in which the peripheral portion and at least a portion of the main body are integrally formed. This allows the peripheral portion and at least a portion of the main body to be manufactured integrally, simplifying the patch assembly process and ensuring the connection strength between the two. Furthermore, the peripheral portion can be assembled together with the main body, simplifying the assembly process and reducing the number of steps required to manufacture and assemble the battery cell.

[0021] In some embodiments, along the second direction, the patch assembly at least partially includes an adhesive structure, and the adhesive structure has an adhesive layer on both the side close to the first wall and the side away from the first wall, and the second direction intersects with the first direction.

[0022] The battery cell provided in one embodiment of the present application can facilitate installation of other components on the side of the adhesive structure facing away from the first wall by providing an adhesive structure, without the need to re-dispose other adhesive structures.

[0023] In some embodiments, along the first direction, the patch assembly is provided with a plurality of avoidance holes, the avoidance holes being configured to install electrode terminals and pressure relief assemblies, and along the second direction, the bonding structure is located on at least one side of the avoidance holes.

[0024] A battery cell provided in an embodiment of the present application can avoid the avoidance hole by setting the position of the bonding structure, which has little impact on the normal use of the electrode terminal and the pressure relief assembly, and the structural setting is reasonable.

[0025] In some embodiments, the housing includes a shell and an end cap assembly. The shell includes a side wall and a bottom wall, the side wall is connected to the bottom wall, the end cap assembly is arranged opposite to the bottom wall along a first direction and connected to the side wall, and at least one of the bottom wall and the end cap assembly includes a first wall.

[0026] A battery cell provided in one embodiment of the present application facilitates the installation and protection of the electrode assembly through the arrangement of the shell and the end cover assembly. By making at least one of the bottom wall and the end cover assembly include a first wall, it is facilitated to protect at least one of the bottom wall and the end cover assembly through the patch assembly, thereby reducing the risk of insulation failure of the battery cell and ensuring the reliability of the battery cell.

[0027] In some embodiments, the housing further includes an insulating film, which covers at least a portion of the housing, the insulating film covers the protrusion and extends over a portion of the first wall, a receiving groove is formed between the insulating film and the first wall, and the portion of the patch component located in the receiving groove overlaps the insulating film.

[0028] A battery cell provided in one embodiment of the present application can cover at least a portion of the shell through the provision of an insulating film, thereby improving the insulation effect between the shell and the outside of the battery cell. In addition, the patch assembly is overlapped with the insulating film, so that the patch assembly and the insulating film jointly cover the outer surface of the shell, so that the battery cell remains insulated from other surrounding battery cells or the box, thereby reducing the risk of short circuit of the battery cell and improving the reliability of the battery cell.

[0029] In some embodiments, along the first direction, the positive projection of the first wall is a rounded rectangle, and the figures enclosed by the inner and outer contours of the protrusion are all rounded rectangles. The protrusion includes a first surface, a second surface, and a third surface. The first surface extends along the first direction and is aligned with and connected to the side wall. The second surface at least partially extends along the first direction and is connected to the first wall. The third surface is located between the first and second surfaces, and the third surface has the same extension direction as the first wall. The number of layers of insulating film on the second and third surfaces covering the rounded corners of the protrusion is three layers, and at least part of the insulating film extending to the first wall is three layers. The part of the patch component located in the accommodating groove is overlapped to the three layers of insulating film.

[0030] In a battery cell provided by one embodiment of the present application, by providing three layers of insulating film covering the second and third surfaces at the rounded corners of the protrusion, and at least a portion of the insulating film extending from the first wall being three layers, when the insulating film is applied, there is no need to cut excess insulating film at the corners of the protrusion, thus saving cutting steps and reducing the assembly cost of the insulating film. Furthermore, with respect to the above-mentioned insulating film structure, by overlapping the portion of the patch component located within the receiving groove with the three-layer insulating film structure at the rounded corners, the risk of direct contact between the patch component and the first wall can be reduced, thereby improving the insulation reliability of the battery cell.

[0031] In some embodiments, the length of the insulating film extending from the first wall is between 0.5 mm and 20 mm, and the distance between the portion of the patch component located in the receiving groove and the protrusion is greater than or equal to 0.5 mm.

[0032] In a battery cell provided by an embodiment of the present application, the length of the insulating film extending to the receiving groove is set between 0.5mm and 20mm. The insulating film can cover all parts of the protrusion without covering the receiving groove too long to increase the weight density of the battery cell. At the same time, after the patch component is overlapped with the insulating layer, the distance between the part of the patch component arranged in the receiving groove and the protrusion is greater than 0.5mm, so that the patch component can avoid the protrusion, which is more convenient for the arrangement of the patch component, reduces the risk of insulation failure of the battery cell, and ensures the insulation reliability of the battery cell.

[0033] An embodiment of the present application further provides a battery comprising a battery cell according to any of the above embodiments.

[0034] A battery provided in one embodiment of the present application can reduce the distance between the first wall and the patch assembly by setting the position of the patch assembly, thereby improving the insulation effect between the individual battery cells in the battery, and increasing the insulation effect between the battery cells and the box body in the battery, thereby improving the reliability of the battery.

[0035] An embodiment of the present application further provides an electrical device comprising the battery of any of the above embodiments.

[0036] An electrical device provided in an embodiment of the present application improves the insulation effect of the battery in the electrical device and enhances user experience through the arrangement of the above-mentioned battery.

[0037] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference symbols are used throughout the drawings to represent the same components. In the drawings:

[0039] Figure 1 It is a structural schematic diagram of a vehicle embodiment of the present application;

[0040] Figure 2 This is an exploded schematic diagram of an embodiment of a battery of the present application;

[0041] Figure 3 This is a schematic structural diagram of a portion of the structure of a battery cell according to an embodiment of the present application;

[0042] Figure 4 This is an exploded schematic diagram of a partial structure of a battery cell embodiment of the present application;

[0043] Figure 5 is a schematic top view of an embodiment of a battery cell of the present application;

[0044] Figure 6 This application Figure 5 Schematic cross-sectional view along the AA direction;

[0045] Figure 7 This application Figure 6 D2 is an enlarged schematic diagram of an embodiment;

[0046] Figure 8 This application Figure 6 D2 is an enlarged schematic diagram of another embodiment;

[0047] Figure 9 This application Figure 6 D2 is an enlarged schematic diagram of another embodiment;

[0048] Figure 10 is a cross-sectional schematic diagram of an embodiment of a battery cell of the present application from another perspective;

[0049] Figure 11 This application Figure 10 A magnified schematic diagram of D1 in the middle;

[0050] Figure 12 This is a schematic structural diagram of an embodiment of a housing of the present application;

[0051] Figure 13 This application Figure 12 D3 is an enlarged schematic diagram of an embodiment;

[0052] Figure 14 It is a structural schematic diagram of another embodiment of the battery cell of the present application.

[0053] The accompanying drawings in the specific implementation manner are as follows:

[0054] 1 vehicle; 11 motor; 12 controller; 13 battery;

[0055] 10 battery cells;

[0056] 100 housing; A2 receiving slot; X first direction; Y second direction;

[0057] 100a first wall;

[0058] 100b is a protrusion; S1 is the first surface; S2 is the second surface; S3 is the third surface;

[0059] 110 housing; 111 side wall; 112 bottom wall;

[0060] 120 end cover assembly;

[0061] 200 electrode assemblies;

[0062] 300 SMD components;

[0063] 310 main body;

[0064] 310a a first insulating layer;

[0065] 311 protective layer; 3111 patch layer; 3112 adhesive layer;

[0066] 320 peripheral department;

[0067] 330 bonding structure;

[0068] 400 insulation film;

[0069] 20 cabinet; 21 first cabinet; 22 second cabinet. DETAILED DESCRIPTION

[0070] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0071] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should have the common meanings understood by technicians in the field to which the embodiments of the present application belong.

[0072] 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. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They 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. Therefore, they should not be understood as limiting the embodiments of the present application.

[0073] In addition, the technical terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of the embodiments of the present application, the meaning of "plurality" is more than two, unless otherwise specifically defined.

[0074] 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; and 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.

[0075] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0076] Currently, market developments indicate that power batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0077] In battery technology, a patch assembly is provided on at least one of the top or bottom walls of a battery cell's housing. The patch assembly is used to insulate a battery cell from adjacent cells, or from the housing itself. However, in related art, to protect the mold used to make the top or bottom wall, a protrusion is often provided on the side of the top or bottom wall of the housing away from the electrode assembly, and the patch assembly is generally overlapped with the protrusion. This arrangement results in an excessive distance between the patch assembly and the top or bottom wall, increasing the risk of insulation failure in the battery cell and affecting the reliability of the battery cell.

[0078] Based on the above considerations, in order to solve the above-mentioned problems, after research, it was found that the above-mentioned problems can be solved by the structure of the battery cell. Specifically, a battery cell is proposed, which includes a housing, an electrode assembly, and a patch assembly. The housing has a cavity, and the housing includes a first wall. A protrusion is provided on the side of the first wall facing away from the cavity. The protrusion and the first wall enclose a receiving groove, and the electrode assembly is disposed in the cavity. The patch assembly is disposed on the side of the first wall facing away from the cavity, and the patch assembly is at least partially disposed in the receiving groove.

[0079] In a battery cell provided by an embodiment of the present application, the patch component is at least arranged in the receiving groove, thereby reducing the distance between the patch component and the first wall, shortening the distance between the patch component and the first wall that can play an insulating role, and thus reducing the risk of insulation failure of the battery cell.

[0080] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0081] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device according to an embodiment of the present application.

[0082] Please refer to Figure 1 As shown, Figure 1 : is a structural diagram of an embodiment of a vehicle of the present application. Vehicle 1 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 13 is provided inside the vehicle 1. The battery 13 can be provided at the bottom, head or tail of the vehicle 1. The battery 13 can be used to power the vehicle 1. For example, the battery 13 can serve as an operating power source for the vehicle 1. The vehicle 1 can also include a controller 12 and a motor 11. The controller 12 is used to control the battery 13 to power the motor 11, for example, for starting, navigating and operating power requirements of the vehicle 1 during driving.

[0083] Please refer to Figure 2 As shown, Figure 2 This is an exploded diagram of an embodiment of the battery 13 of the present application. In some embodiments of the present application, the battery 13 can not only serve as the operating power source of the vehicle 1, but also serve as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0084] The battery 13 mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells 10 to provide higher voltage and capacity. When there are multiple battery cells 10, the multiple battery cells 10 are connected in series, in parallel or in hybrid through a busbar.

[0085] In some embodiments, the battery 13 may be a battery module; when there are multiple battery cells 10 , the multiple battery cells 10 are arranged and fixed to form a battery module.

[0086] In some embodiments, the battery 13 may be a battery pack, which includes a case 20 and battery cells 10 . The battery cells 10 or battery modules are housed in the case 20 .

[0087] The housing 20 can adopt a variety of structures. In some embodiments, the housing 20 can include a first housing 21 and a second housing 22. The first housing 21 and the second housing 22 cover each other, and the first housing 21 and the second housing 22 jointly define a storage space for accommodating the battery cells 10. The second housing 22 can be a hollow structure with one end open, and the first housing 21 can be a plate-like structure. The first housing 21 covers the open side of the second housing 22, so that the first housing 21 and the second housing 22 jointly define a storage space; the first housing 21 and the second housing 22 can also be hollow structures with one side open, and the open side of the first housing 21 covers the open side of the second housing 22. Of course, the housing 20 formed by the first housing 21 and the second housing 22 can be of various shapes, such as a cylinder, a cuboid, etc.

[0088] In some embodiments, the box 20 may serve as part of the chassis structure of the vehicle 1. For example, part of the box 20 may become at least part of the floor of the vehicle 1, or part of the box 20 may become at least part of the cross member and longitudinal member of the vehicle 1.

[0089] In some embodiments, the battery 13 may be an energy storage device, including an energy storage container, an energy storage cabinet, and the like.

[0090] In the battery 13, there may be multiple battery cells 10, and the multiple battery cells 10 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 10. The multiple battery cells 10 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery 10 may be housed within the housing 20. Of course, the battery 13 may also be a battery module 13 formed by first connecting multiple battery cells 10 in series, in parallel, or in a hybrid connection, and then the multiple battery modules 13 may be connected in series, in parallel, or in a hybrid connection to form a complete battery 13, and then housed within the housing 20. The battery 13 may also include other structures, for example, the battery 13 may also include a busbar component for electrically connecting the multiple battery cells 10.

[0091] Please refer to Figures 3 to 9 As shown, Figure 3 This is a schematic diagram of a partial structure of an embodiment of a battery cell 10 of the present application. Figure 4 This is an exploded schematic diagram of a partial structure of an embodiment of a battery cell 10 of the present application. Figure 5 is a top view of an embodiment of a battery cell 10 of the present application. Figure 6 This application Figure 5 Schematic cross-sectional view along the AA direction, Figure 7 This application Figure 6 D2 is an enlarged schematic diagram of an embodiment.

[0092] In the embodiment of the present application, the battery cell 10 may be a secondary battery cell 10 . A secondary battery cell 10 refers to a battery cell 10 that can be continuously used by activating active materials by charging after the battery cell 10 is discharged.

[0093] The present embodiment provides a battery cell 10, comprising a housing 100, an electrode assembly 200, and a patch assembly 300. The housing 100 has a cavity and includes a first wall 100a. A protrusion 100b is provided on a side of the first wall 100a facing away from the cavity. The protrusion 100b and the first wall 100a together form a receiving groove A2, in which the electrode assembly 200 is disposed. The patch assembly 300 is disposed on a side of the first wall 100a facing away from the cavity, and is at least partially disposed within the receiving groove A2.

[0094] Optionally, the housing 100 includes a shell 110 and an end cap assembly 120 . The shell 110 includes side walls 111 and a bottom wall 112 . The bottom wall 112 and the end cap assembly 120 are disposed opposite to each other along the first direction X. The protrusion 100 b is disposed on at least one of the end cap assembly 120 or the bottom wall 112 .

[0095] In some embodiments, the shell 110 is a component used to cooperate with the end cap assembly 120 to form the internal environment of the battery cell 10, wherein the formed internal environment can be used to accommodate the electrode assembly 200, the electrolyte and other components. The shell 110 and the end cap assembly 120 can be independent components. An opening can be set on the shell 110, and the internal environment of the battery cell 10 is formed by covering the opening with the end cap assembly 120. Without limitation, the end cap assembly 120 and the shell 110 can also be integrated. Specifically, the end cap assembly 120 and the shell 110 can form a common connection surface before other components are put into the shell. When the interior of the shell 110 needs to be encapsulated, the end cap assembly 120 is covered with the shell 110. The shell 110 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 110 can be determined according to the specific shape and size of the battery cell assembly. The shell 110 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0096] In some embodiments, the end cap assembly 120 is a component that covers the opening of the housing 110 to isolate the internal environment of the battery cell 10 from the external environment. The shape of the end cap assembly 120 can be adapted to the shape of the housing 110 to fit the housing 110. Optionally, the end cap assembly 120 can be made of a material with a certain hardness and strength (such as an aluminum alloy). This prevents the end cap assembly 120 from deforming when subjected to compression or collision, thereby enhancing the structural strength and safety of the battery cell 10. The end cap assembly 120 can be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect to the battery cell assembly to output or input electrical energy to the battery cell 10. In some embodiments, the end cap assembly 120 can also be provided with a pressure relief mechanism for relieving internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold. The end cap assembly 120 can also be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this is not particularly limited in the present embodiments. In some embodiments, an insulating member may be provided inside the end cap assembly 120 to isolate the electrical connection components in the housing 110 from the end cap assembly 120 to reduce the risk of short circuits. For example, the insulating member may be made of plastic, rubber, or the like.

[0097] Optionally, the end cover assembly 120 includes an end cover plate, and the protrusion 100b is provided on the end cover plate.

[0098] All or part of the patch component 300 is located in the receiving groove A2.

[0099] Optionally, the patch component 300 is made of an insulating material, such as rubber, plastic, and the like.

[0100] The first wall 100a refers to at least one of the wall surfaces provided at the position of the end cover piece of the end cover assembly 120 or the bottom wall 112 of the shell 110. Optionally, the structure of the first wall 100a includes a flat plate-like structure.

[0101] The protrusion 100b refers to a protruding structure on the first wall 100a. The protrusion 100b may include at least one protruding unit. The protrusion 100b may be an integral structure with the first wall 100a.

[0102] Accommodation groove A2 is the groove formed between protrusion 100b and first wall 100a. First wall 100a forms bottom wall 112 of accommodation groove A2, and the surface of protrusion 100b facing first wall 100a forms the sidewalls of accommodation groove A2. The shape of accommodation groove A2 includes, but is not limited to, a rectangular parallelepiped groove, a cube groove, and other special-shaped grooves.

[0103] In a battery cell 10 provided in an embodiment of the present application, the patch component 300 is at least arranged in the accommodating groove A2, thereby reducing the distance between the patch component 300 and the first wall 100a and shortening the distance between the patch component 300 and the first wall 100a that can play an insulating role, thereby reducing the risk of insulation failure of the battery cell 10.

[0104] Please refer to Figures 8 to 11 As shown, Figure 8 This application Figure 6 D2 is an enlarged schematic diagram of another embodiment, Figure 9 This application Figure 6 D2 is an enlarged schematic diagram of another embodiment, Figure 10 is a cross-sectional schematic diagram of another perspective of an embodiment of the battery cell 10 of the present application, Figure 11 This application Figure 10 Schematic diagram of the enlarged image of D1.

[0105] In some embodiments, the patch assembly 300 includes a main body 310 , which is at least partially embedded in the receiving groove A2 , and an orthographic projection of the main body 310 on the first wall 100 a is located in the receiving groove A2 .

[0106] Along the first direction X, the main body 310 may be higher than the protrusion 100 b , lower than the protrusion 100 b , or aligned with the protrusion 100 b .

[0107] The main body 310 and the protrusion 100 b may be spaced apart.

[0108] In an embodiment of the present application, a battery cell 10 is provided in which the orthographic projection of the main body 310 on the first wall 100a is located in the receiving groove A2. When assembling the main body 310, it can be embedded in the receiving groove A2. This can reduce the difficulty of alignment during the assembly of the patch component 300 while shortening the distance between the main body 310 and the first wall 100a, thereby simplifying the assembly process.

[0109] In some embodiments, the main body 310 includes a first insulating layer 310 a , and the first insulating layer 310 a is at least partially located in the receiving groove A2 and connected to the first wall 100 a .

[0110] The first insulating layer 310 a and the first wall 100 a may be directly connected or indirectly connected.

[0111] If the first insulating layer 310a is directly connected to the first wall 100a, hot melt connection or hot pressing connection can be used; if the first insulating layer 310a is indirectly connected to the first wall 100a, an insulating film 400 can be sandwiched between the first insulating layer 310a and the first wall 100a, and the insulating film 400 is respectively connected to the first wall 100a and the first insulating layer 310a.

[0112] The battery cell 10 provided in one embodiment of the present application can facilitate the assembly of the patch assembly 300 by providing the first insulating layer 310 a , thereby simplifying the assembly process and reducing the installation process of the battery cell 10 .

[0113] In some embodiments, the main body 310 includes two or more stacked protective layers 311 , and at least one protective layer 311 is located in the receiving groove A2 .

[0114] The structure of the protection layer 311 may include at least one of an adhesive layer 3112 or a glue layer.

[0115] One layer of the protection layer 311 may be disposed in the receiving groove A2 , or both layers of the protection layer 311 may be disposed in the receiving groove A2 .

[0116] The battery cell 10 provided in one embodiment of the present application can provide multi-layer protection for the first wall 100a by setting up two or more stacked protective layers 311, which can not only protect the first wall 100a and reduce the probability of wear of the first wall 100a, but also increase the insulation effect of the main body 310.

[0117] In some embodiments, the two or more protective layers 311 include a patch layer 3111 and an adhesive layer 3112 . The adhesive layer 3112 is located between the patch layer 3111 and the first wall 100 a , and the adhesive layer 3112 is connected to the first wall 100 a .

[0118] The structure of the adhesive layer 3112 includes but is not limited to an insulating adhesive structure.

[0119] The battery cell 10 provided in one embodiment of the present application can facilitate the attachment of the patch assembly 300 to the first wall 100a through the provision of the adhesive layer 3112 and the patch layer 3111, thereby simplifying the connection process, ensuring multi-level insulation protection, and improving the connection strength between the patch assembly 300 and the first wall 100a, thereby reducing the risk of separation of the patch assembly 300 from the first wall 100a.

[0120] In some embodiments, the main body 310 is spaced apart from the orthographic projection of the protrusion 100b on the first wall 100a.

[0121] Optionally, the distance between the orthographic projection of the main body 310 on the first wall 100a and the orthographic projection of the protrusion 100b on the first wall 100a is greater than or equal to 0.5 mm. Exemplarily, the distance between the two includes 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, etc.

[0122] In a battery cell 10 provided in one embodiment of the present application, the orthographic projection of the main body 310 on the first wall 100a is arranged at an interval between the orthographic projection of the protrusion 100b on the first wall 100a. This can reduce the probability of misoperation during assembly of the main body 310, resulting in the entire body 310 overlapping the protrusion 100b, thereby improving the accuracy of assembly.

[0123] In some embodiments, the patch assembly 300 further includes a peripheral portion 320 , which is arranged around the main portion 310 and connected to the main portion 310 , and the peripheral portion 320 is arranged on the side of the protrusion 100b away from the first wall 100a and covers the protrusion 100b .

[0124] The peripheral portion 320 may be disposed to cover at least or entirely a side of the protrusion 100 b facing away from the first wall 100 a .

[0125] The battery cell 10 provided in one embodiment of the present application can wrap the position of the protrusion 100b through the setting of the outer portion 320, thereby increasing the protection of the protrusion 100b, reducing the probability of damage to the position of the protrusion 100b, and increasing the insulation effect between the protrusion 100b and the outside of the battery cell 10.

[0126] In some embodiments, the peripheral portion 320 and at least a portion of the main body 310 are an integral structure.

[0127] Exemplarily, when the main body 310 includes two or more stacked protective layers 311 , the peripheral portion 320 and the protective layer 311 farthest from the first wall 100 a form an integrated structure.

[0128] The battery cell 10 provided in one embodiment of the present application can be made into an integrated structure with at least part of the peripheral portion 320 and the main body 310 by setting the peripheral portion 320 and at least part of the main body 310 as an integrated structure, thereby simplifying the process of making the patch component 300. When the peripheral portion 320 is assembled, it can be assembled together with the main body 310, which simplifies the assembly process and saves the production and assembly steps of the battery cell 10.

[0129] See also Figures 8 to 13 , Figure 12 This is a schematic structural diagram of an embodiment of a housing of the present application. Figure 13 This application Figure 12 A magnified schematic diagram of D3 in the figure.

[0130] In some embodiments, the housing 100 also includes an insulating film 400, which covers at least a portion of the shell 110. The insulating film 400 covers the protrusion 100b and extends on a portion of the first wall 100a. A receiving groove is formed between the insulating film 400 and the first wall 100a, and the portion of the patch component 300 located in the receiving groove overlaps the insulating film 400.

[0131] The insulating film 400 may cover the sidewall 111 and at least a portion of the bottom wall 112 of the housing 110 or at least a portion of the end cap assembly 120 .

[0132] The length of the insulating film 400 extending from the first wall 100 a can be adjusted according to actual conditions.

[0133] The battery cell 10 provided in one embodiment of the present application can cover at least a portion of the shell 110 through the setting of the insulating film 400, thereby improving the insulation effect between the shell 110 and the outside of the battery cell 10. In addition, the patch component 300 is overlapped with the setting of the insulating film 400, so that the patch component 300 and the insulating film 400 jointly cover the outer surface of the shell 110, so that the battery cell 10 is insulated from other surrounding battery cells 10 or the box 20, thereby reducing the probability of a dangerous short circuit in the battery cell 10 and improving the reliability of the battery cell 10.

[0134] In some embodiments, along the first direction X, the orthographic projection of the first wall 100a is a rounded rectangle, and the figures enclosed by the inner and outer contours of the protrusion 100b are all rounded rectangles. The protrusion 100b includes a first surface S1, a second surface S2, and a third surface S3. The first surface S1 extends along the first direction X and is aligned with and connected to the side wall 111. The second surface S2 at least partially extends along the first direction X and is connected to the first wall 100a. The third surface S3 is located between the first surface S1 and the second surface S2. The third surface S3 is consistent with the extension direction of the first wall 100a. The number of layers of the second surface S2 and the third surface S3 insulating film 400 covering the rounded corners of the protrusion 100b is three layers. At least a portion of the insulating film 400 extending to the first wall 100a is three layers. The portion of the patch component 300 located in the accommodating groove is overlapped on the three-layer insulating film 400.

[0135] To facilitate the setting of the insulating film 400, in the actual manufacturing process, the end of the insulating film 400 along the first direction X can be set to protrude from the protrusion 100b, and the protruding end of the insulating film 400 can be bent to cover the protrusion 100b and part of the surface of the first wall 100a, thereby directly realizing the covering of the outer surface of the shell 110 by the insulating film 400. There is no need to cut the excess insulating film 400 at the various rounded corners of the protrusion 100b, which saves the cutting process and reduces the assembly cost of the insulating film 400.

[0136] Since the insulating film 400 is a ring-shaped structure, when the insulating film 400 is bent to the surface of the portion of the first wall 100a, although the insulating film 400 will be directly bent to the portion of the first wall 100a, the second surface S2, and the third surface S3 at each side of the protrusion 100b to form a layer of insulating film structure, but at the rounded corner where two adjacent sides intersect on the protrusion 100b, when the insulating film 400 on one side is bent to the portion of the first wall 100a, the second surface S2, and the third surface S3 to form a layer of insulating film, the insulating film 400 on the other side will bend itself under the action of extrusion to form a double-layer insulating film, and cover the layer of insulating film on the aforementioned side, and together form a three-layer insulating film structure.

[0137] With respect to the above-mentioned insulating film structure, by overlapping the portion of the patch component 300 located in the accommodating groove A2 onto the three-layer insulating film structure at the rounded corner, compared to overlapping onto a single-layer insulating film structure corresponding to each side of the protrusion 100b, the risk of direct contact between the patch component 300 and the first wall 100a can be reduced, thereby improving the insulation reliability of the battery cell.

[0138] In some embodiments, the length of the insulating film 400 extending from the first wall 100a is between 0.5 mm and 20 mm, and the distance between the portion of the patch component 300 located in the receiving groove A2 and the protrusion 100b is greater than or equal to 0.5 mm.

[0139] The length of the insulating film 400 extending on the first wall 100 a includes 0.5 mm, 5 mm, 10 mm, 20 mm, and the like.

[0140] If the length dimension of the insulating film 400 extending to the first wall 100a is 0.5 mm, the insulating film 400 can wrap various positions of the protrusion 100b; if the length dimension of the insulating film 400 extending to the first wall 100a is 10 mm, it can not only wrap various positions of the protrusion 100b, but also reduce the adverse effects of the setting of the insulating film 400 on the weight density of the battery cell 10; if the length dimension of the insulating film 400 extending to the first wall 100a is 20 mm, it can fully wrap various positions of the protrusion 100b, and also reduce the effects of the insulating film 400 on the weight density of the battery cell 10. In a battery cell 10 provided by an embodiment of the present application, the length of the insulating film 400 extending from the first wall 100a is set between 0.5 mm and 20 mm. The insulating film 400 can cover various parts of the protrusion 100b without covering the first wall 100a too long to increase the weight density of the battery cell 10. At the same time, after the patch component 300 is overlapped with the insulating film 400, the distance between the part of the patch component 300 arranged in the accommodating groove A2 and the protrusion 100b is greater than or equal to 0.5 mm, so that the patch component 300 can avoid the protrusion 100b, which is more convenient for the arrangement of the patch component 300, reduces the risk of insulation failure of the battery cell 10, and ensures the insulation reliability of the battery cell 10.

[0141] One embodiment of the present application provides a battery cell 10, which includes a shell 100, an electrode assembly 200, and a patch assembly 300. The shell 100 has a cavity. The shell 100 includes a first wall 100a. A protrusion 100b is provided on the side of the first wall 100a facing away from the cavity. The protrusion 100b and the first wall 100a enclose a receiving groove A2, and the electrode assembly 200 is provided in the cavity. The patch assembly 300 is provided on the side of the first wall 100a facing away from the cavity. The patch assembly 300 is at least partially provided in the receiving groove A2. The patch assembly 300 includes a main body 310. The main body 310 is at least partially embedded in the receiving groove A2. The orthographic projection of the main body 310 on the first wall 100a is located in the receiving groove A2. The main body 310 includes a first insulating layer 310a. The first insulating layer 310a is at least partially located in the receiving groove A2 and is connected to the first wall 100a. Or the main body 310 includes two or more stacked protective layers 311, and at least one protective layer 311 is located in the accommodating groove A2. The two or more protective layers 311 include a patch layer 3111 and an adhesive layer 3112, the adhesive layer 3112 is located between the patch layer 3111 and the first wall 100a, and the adhesive layer 3112 is connected to the first wall 100a. The main body 310 is spaced apart between the orthographic projection of the main body 310 on the first wall 100a and the orthographic projection of the protrusion 100b on the first wall 100a. The housing 100 includes a shell 110 and an end cover assembly 120. The shell 110 includes a side wall 111 and a bottom wall 112, the side wall 111 is connected to the bottom wall 112, the end cover assembly 120 is arranged opposite to the bottom wall 112 along the first direction X and is connected to the side wall 111, and at least one of the bottom wall 112 and the end cover assembly 120 includes the first wall 100a. The battery cell 10 further includes an insulating film 400 , which covers at least a portion of the housing 110 . The insulating film 400 covers the protrusion 100 b and extends into the receiving groove A2 . A portion of the patch assembly 300 overlaps the insulating film 400 . Along the first direction X, the orthographic projection of the first wall 100a is a rounded rectangle. The inner and outer contours of the protrusion 100b also form a rounded rectangle. The protrusion 100b includes a first surface S1, a second surface S2, and a third surface S3. The first surface S1 extends along the first direction X and is aligned with and connected to the sidewall 111. The second surface S2 extends at least partially along the first direction X and is connected to the first wall 100a. The third surface S3 is located between the first and second surfaces S1 and S2 and extends in the same direction as the first wall 100a. The insulating film 400 covering the second and third surfaces S2 and S3 at each corner of the protrusion 100b is three layers. At least the portion of the insulating film 400 extending into the receiving groove A2 is three layers. The length of the insulating film 400 extending into the receiving groove A2 is between 0.5 mm and 20 mm.

[0142] Please refer to Figure 14 As shown, Figure 14It is a structural diagram of another embodiment of the battery cell 10 of the present application.

[0143] In some embodiments, along the second direction Y, the patch assembly 300 at least partially includes an adhesive structure 330, and the adhesive structure 330 has an adhesive layer on both the surface close to the first wall 100a and the surface away from the first wall 100a. The second direction Y intersects the first direction X.

[0144] The shape of the orthographic projection of the bonding structure 330 on the first wall 100 a includes but is not limited to a square, a circle, and the like.

[0145] The battery cell 10 provided in one embodiment of the present application can facilitate installation of other components on the side of the adhesive structure 330 away from the first wall 100a through the provision of the adhesive structure 330 without re-provision of other adhesive structures.

[0146] In some embodiments, the patch assembly 300 is provided with a plurality of avoidance holes along the first direction X, and the avoidance holes are configured to install electrode terminals and pressure relief components. Along the second direction Y, the bonding structure 330 is located on at least one side of the avoidance holes.

[0147] The battery cell 10 provided in one embodiment of the present application can avoid the avoidance hole by setting the position of the bonding structure 330, which has little impact on the normal use of the electrode terminal and the pressure relief assembly, and the structural setting is reasonable.

[0148] In some embodiments, the housing 100 includes a shell 110 and an end cap assembly 120. The shell 110 includes a side wall 111 and a bottom wall 112, wherein the side wall 111 is connected to the bottom wall 112. The end cap assembly 120 is disposed opposite to the bottom wall 112 along a first direction X and is connected to the side wall 111. At least one of the bottom wall 112 and the end cap assembly 120 includes a first wall 100a.

[0149] A battery cell 10 provided in one embodiment of the present application facilitates the installation and protection of the electrode assembly through the arrangement of the shell 110 and the end cover assembly 120. By making at least one of the bottom wall 112 and the end cover assembly 120 include the first wall 100a, it is facilitated to protect at least one of the bottom wall 112 and the end cover assembly 120 through the patch assembly 300, thereby reducing the risk of insulation failure of the battery cell 10 and ensuring the reliability of the battery cell 10.

[0150] The embodiment of the present application further provides a battery 13 comprising the battery cell 10 of any of the above embodiments.

[0151] The battery 13 includes a plurality of battery cells 10 .

[0152] The battery 13 provided in one embodiment of the present application can reduce the distance between the first wall 100a and the patch component 300 by setting the position of the patch component 300, thereby improving the insulation effect between the individual battery cells 10 in the battery 13, and increasing the insulation effect between the battery cells 10 in the battery 13 and the box body 20, thereby improving the reliability of the battery 13.

[0153] An embodiment of the present application further provides an electrical device, comprising the battery 13 of any of the above embodiments.

[0154] An electrical device provided in an embodiment of the present application improves the insulation effect of the battery 13 in the electrical device and enhances user experience through the provision of the above-mentioned battery 13.

[0155] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery cell, characterized in that: include: A housing having a cavity, the housing comprising a first wall, a protrusion being provided on a side of the first wall facing away from the cavity, the protrusion and the first wall forming a receiving groove; an electrode assembly, disposed in the cavity; The patch assembly is arranged on a side of the first wall away from the cavity, and the patch assembly is at least partially arranged in the accommodating groove.

2. The battery cell according to claim 1, wherein: The patch assembly includes a main body portion, which is at least partially embedded in the receiving groove, and an orthographic projection of the main body portion on the first wall is located in the receiving groove.

3. The battery cell according to claim 2, characterized in that: The main body includes a first insulating layer, and the first insulating layer is at least partially located in the receiving groove and connected to the first wall.

4. The battery cell according to claim 2, characterized in that: The main body includes two or more stacked protective layers, and at least one of the protective layers is located in the receiving groove.

5. The battery cell according to claim 4, characterized in that The two or more protective layers include a patch layer and an adhesive layer. The adhesive layer is located between the patch layer and the first wall, and the adhesive layer is connected to the first wall.

6. The battery cell according to claim 2, characterized in that The main body is spaced apart from the orthographic projection of the main body on the first wall and the orthographic projection of the protrusion on the first wall.

7. The battery cell according to any one of claims 2 to 6, characterized in that: The patch assembly further includes a peripheral portion, which is arranged around the main body and connected to the main body. The peripheral portion is arranged on a side of the protrusion away from the first wall and covers the protrusion.

8. The battery cell according to claim 7, characterized in that The peripheral portion and at least a portion of the main body are an integral structure.

9. The battery cell according to any one of claims 1 to 6, characterized in that: Along a second direction, the patch assembly at least partially includes an adhesive structure, and the surfaces of the adhesive structure close to the first wall and away from the first wall both have an adhesive layer, and the second direction intersects with the first direction.

10. The battery cell according to claim 9, characterized in that Along the first direction, the patch assembly is provided with a plurality of avoidance holes, and the avoidance holes are configured to install electrode terminals and pressure relief components. Along the second direction, the bonding structure is located on at least one side of the avoidance holes.

11. The battery cell according to any one of claims 1 to 6, characterized in that: The housing comprises: The housing comprises a side wall and a bottom wall, wherein the side wall is connected to the bottom wall; An end cover assembly is arranged opposite to the bottom wall along a first direction and connected to the side wall, and at least one of the bottom wall and the end cover assembly includes the first wall.

12. The battery cell according to claim 11, characterized in that The shell also includes an insulating film, which covers at least a portion of the shell, the insulating film covers the protrusion and extends to a portion of the first wall, the receiving groove is formed between the insulating film and the first wall, and the portion of the patch component located in the receiving groove overlaps the insulating film.

13. The battery cell according to claim 12, characterized in that Along the first direction, the orthographic projection of the first wall is a rounded rectangle, and the figures enclosed by the inner and outer contours of the protrusion are both rounded rectangles. The protrusion includes a first surface, a second surface, and a third surface. The first surface extends along a first direction and is aligned with and connected to the side wall. The second surface at least partially extends along the first direction and is connected to the first wall. The third surface is located between the first and second surfaces. The third surface is consistent with the extension direction of the first wall. The number of layers of the insulating film covering the second and third surfaces at the various rounded corners of the protrusion is three layers. At least the portion of the insulating film extending to the first wall is three layers. The portion of the patch component located in the accommodating groove is overlapped to the three-layer insulating film.

14. The battery cell according to claim 12, characterized in that The length of the insulating film extending from the first wall is between 0.5 mm and 20 mm, and the distance between the portion of the patch component located in the receiving groove and the protrusion is greater than or equal to 0.5 mm.

15. A battery, characterized in that: A battery cell comprising the battery cell according to any one of claims 1 to 14.

16. An electrical device, characterized in that: Including the battery according to claim 15.

Images