Battery cell, battery, and electrical device

Abstract

The present application provides a battery cell, a battery, and an electrical device. The battery cell comprises a housing, an electrode assembly, and a patch assembly. The housing has a cavity and comprises a first wall. A protrusion is disposed on the side of the first wall facing away from the cavity, and the protrusion and the first wall together enclose an accommodation recess. 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 at least the patch assembly is at least partially disposed in the accommodation recess. According to the battery cell provided in an embodiment of the present application, by configuring the patch assembly to be at least partially disposed in the accommodation recess, the distance between the patch assembly and the first wall can be reduced, shortening the effective insulating path between the patch assembly and the first wall and thereby reducing the risk of insulation failure of the battery cell.

Description

Battery cell, battery and electric device

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 202421841455.1, filed on July 31, 2024, entitled “Battery cell, battery and electric device”, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of batteries, in particular to a battery cell, a battery and an electric device. BACKGROUND

[0004] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is an important factor for their development.

[0005] The battery cell is provided with a patch assembly. The use of the patch assembly is to increase the insulation performance of the battery cell. However, in the related art, the structure of the patch assembly makes the battery cell have a high risk of insulation failure, affecting the reliability of the battery cell. SUMMARY

[0006] In view of the above problems, the present application provides a battery cell, a battery and an electric device, which can reduce the risk of insulation failure of the battery cell and ensure the reliability of the battery cell.

[0007] The battery cell provided by the embodiment of the present application comprises an outer shell, an electrode assembly and a patch assembly. The outer shell has a cavity. The outer shell comprises a first wall. A protrusion is arranged on the side of the first wall away from the cavity. The protrusion and the first wall form an accommodation groove. The electrode assembly is arranged in the cavity. The patch assembly is arranged on the side of the first wall away from the cavity. The patch assembly is at least partially arranged in the accommodation groove.

[0008] The battery cell provided by an embodiment of the present application reduces the distance between the patch assembly and the first wall by arranging the patch assembly at least in the accommodation groove, shortens the stroke in which the patch assembly and the first wall can play an insulation role, thereby reducing the risk of insulation failure of the battery cell and ensuring the insulation reliability of the battery cell.

[0009] In some embodiments, the patch assembly comprises a main body portion, and the main body portion is at least partially embedded in the accommodation groove. The orthographic projection of the main body portion on the first wall is located in the accommodation groove.

[0010] The battery monomer provided by the embodiment of the application is arranged through the normal projection of the main body on the first wall in the accommodating groove, so that when the main body is assembled, the main body can be embedded in the accommodating groove, the distance between the main body and the first wall is shortened, the alignment difficulty in the assembly process of the patch assembly is reduced, and the assembly process is simplified.

[0011] In some embodiments, the main body comprises a first insulation layer, and the first insulation layer is at least partially located in the accommodating groove and connected with the first wall.

[0012] The battery monomer provided by the embodiment of the application is arranged through the normal projection of the main body on the first wall in the accommodating groove, so that when the main body is assembled, the main body can be embedded in the accommodating groove, the distance between the main body and the first wall is shortened, the alignment difficulty in the assembly process of the patch assembly is reduced, and the assembly process is simplified.

[0013] In some embodiments, the main body comprises two or more protective layers arranged in a stack, and at least one protective layer is located in the accommodating groove.

[0014] The battery monomer provided by the embodiment of the application is arranged through the normal projection of the main body on the first wall in the accommodating groove, so that when the main body is assembled, the main body can be embedded in the accommodating groove, the distance between the main body and the first wall is shortened, the alignment difficulty in the assembly process of the patch assembly is reduced, and the assembly process is simplified.

[0015] In some embodiments, the two or more protective layers comprise 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 with the first wall.

[0016] The battery monomer provided by the embodiment of the application is arranged through the normal projection of the main body on the first wall in the accommodating groove, so that when the main body is assembled, the main body can be embedded in the accommodating groove, the distance between the main body and the first wall is shortened, the alignment difficulty in the assembly process of the patch assembly is reduced, and the assembly process is simplified.

[0017] In some embodiments, the normal projection of the main body on the first wall is arranged at intervals between the normal projection of the protrusion on the first wall.

[0018] The battery monomer provided by the embodiment of the application is arranged through the normal projection of the main body on the first wall in the accommodating groove, so that when the main body is assembled, the main body can be embedded in the accommodating groove, the distance between the main body and the first wall is shortened, the alignment difficulty in the assembly process of the patch assembly is reduced, and the assembly process is simplified.

[0019] In some embodiments, the patch assembly further comprises a peripheral portion, the peripheral portion is arranged around the main body and connected with the main body, and the peripheral portion is arranged on the side of the protrusion away from the first wall and covers the protrusion.

[0020] The battery cell provided by the embodiment of the present application can wrap the protrusion, increase the protection of the protrusion, reduce the probability of damage of the protrusion, and increase the insulation effect between the protrusion and the outside of the battery cell.

[0021] In some embodiments, the peripheral part and at least part of the main body part are an integral structure.

[0022] The battery cell provided by the embodiment of the present application can make the peripheral part and at least part of the main body part be integrally manufactured, simplify the process of manufacturing the patch assembly, ensure the connection strength between the peripheral part and the main body part, and simplify the assembly process and save the manufacturing and assembly process of the battery cell.

[0023] In some embodiments, along the second direction, the patch assembly at least partially includes a bonding structure, the bonding structure is provided with a bonding layer on the side close to the first wall and the side away from the first wall, and the second direction intersects the first direction.

[0024] The battery cell provided by the embodiment of the present application can facilitate the installation of other components on the side of the bonding structure away from the first wall without the need to re-set other structures with adhesion.

[0025] In some embodiments, along the first direction, the patch assembly is provided with a plurality of avoiding holes configured to install the electrode terminal and the pressure relief assembly, and along the second direction, the bonding structure is located on at least one side of the avoiding hole.

[0026] The battery cell provided by the embodiment of the present application can avoid the avoiding hole, has little influence on the normal use of the electrode terminal and the pressure relief assembly, and has a reasonable structure.

[0027] In some embodiments, the shell includes a shell body and an end cover assembly. The shell body includes a side wall and a bottom wall, and the side wall is connected to the bottom wall. The end cover assembly is arranged opposite to the bottom wall along the first direction and connected to the side wall. At least one of the bottom wall and the end cover assembly includes the first wall.

[0028] The battery cell provided by the embodiment of the present application can facilitate the installation and protection of the electrode assembly, and by making at least one of the bottom wall and the end cover assembly include the first wall, the bottom wall and the end cover assembly can be protected by the patch assembly, the risk of insulation failure of the battery cell is reduced, and the reliability of the battery cell is ensured.

[0029] In some embodiments, the shell further comprises an insulating film, the insulating film is wrapped on at least part of the shell, the insulating film covers the protrusion and extends on the part of the first wall, the accommodating groove is formed between the insulating film and the first wall, and the part of the patch assembly located in the accommodating groove is overlapped on the insulating film.

[0030] The battery cell provided by an embodiment of the present application can wrap at least part of the shell through the arrangement of the insulating film, thereby improving the insulation effect between the shell and the outside of the battery cell. In addition, the arrangement of the patch assembly overlapped on the insulating film enables the patch assembly and the insulating film to wrap the outer surface of the shell together, so that the battery cell is insulated from other battery cells around or the box, thereby reducing the risk of short circuit of the battery cell and improving the reliability of the battery cell.

[0031] In some embodiments, in the first direction, the orthographic projection of the first wall is a rounded rectangle, the inner and outer contours of the protrusion enclose a figure which is also a rounded rectangle, the protrusion comprises a first face, a second face and a third face, the first face extends in the first direction and is aligned with and connected to the side wall, the second face extends at least partially in the first direction and is connected to the first wall, and the third face is located between the first face and the second face and is consistent with the extension direction of the first wall. The number of layers of the insulating film covering the second face and the third face at each rounded corner of the protrusion is three, at least part of the insulating film extending on the first wall is three layers, and the part of the patch assembly located in the accommodating groove is overlapped on the three layers of the insulating film.

[0032] The battery cell provided by an embodiment of the present application has the number of layers of the insulating film covering the second face and the third face at each rounded corner of the protrusion as three, and at least part of the insulating film extending on the first wall as three layers. In the wrapping of the insulating film, it is not necessary to cut the excess insulating film at each corner of the protrusion, thereby saving the cutting process and reducing the assembly cost of the insulating film. In addition, for the above insulating film structure, the part of the patch assembly located in the accommodating groove is overlapped on the three layers of the insulating film structure at the rounded corner, which can reduce the risk of direct contact between the patch assembly and the first wall and improve the insulation reliability of the battery cell.

[0033] In some embodiments, the length of the insulating film extending on the first wall is between 0.5 mm and 20 mm, and the distance between the part of the patch assembly located in the accommodating groove and the protrusion is greater than or equal to 0.5 mm.

[0034] The battery monomer provided by the embodiment of the present application is provided by setting the length of the insulating film extending in the accommodating groove to be between 0.5 mm and 20 mm, so that the insulating film can coat each part of the protrusion without covering the accommodating groove too long to increase the weight density of the battery monomer, and after the patch assembly is overlapped on the insulating layer, the distance between the part of the patch assembly arranged in the accommodating groove and the protrusion is greater than 0.5 mm, so that the patch assembly can avoid the protrusion and the patch assembly is more convenient to arrange, the risk of insulation failure of the battery monomer is reduced, and the insulation reliability of the battery monomer is ensured.

[0035] The embodiment of the present application further provides a battery comprising the battery monomer of any of the above embodiments.

[0036] The battery provided by the 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 battery monomers in the battery and increasing the insulation effect between the battery monomers and the box in the battery, and improving the reliability of the battery.

[0037] The embodiment of the present application further provides a power consumption device comprising the battery of any of the above embodiments.

[0038] The power consumption device provided by the embodiment of the present application improves the insulation effect of the battery in the power consumption device by the setting of the above battery, and improves the user experience.

[0039] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, the specific embodiments of the present application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0040] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of illustrating the preferred embodiments and are not considered limiting the present application. Moreover, the same reference symbols are used throughout the drawings to represent the same parts. In the drawings:

[0041] Fig. 1 is a structural schematic diagram of an embodiment of a vehicle of the present application;

[0042] Fig. 2 is an exploded schematic diagram of an embodiment of a battery of the present application;

[0043] Fig. 3 is a structural schematic diagram of part of an embodiment of a battery monomer of the present application;

[0044] Fig. 4 is an exploded schematic diagram of part of an embodiment of a battery monomer of the present application;

[0045] Fig. 5 is a top view of an embodiment of a battery cell according to the present application;

[0046] Fig. 6 is a sectional view of Fig. 5 along the direction of A-A according to the present application;

[0047] Fig. 7 is an enlarged view of an embodiment of D2 in Fig. 6 according to the present application;

[0048] Fig. 8 is an enlarged view of another embodiment of D2 in Fig. 6 according to the present application;

[0049] Fig. 9 is an enlarged view of yet another embodiment of D2 in Fig. 6 according to the present application;

[0050] Fig. 10 is a sectional view of an embodiment of a battery cell according to the present application from another perspective;

[0051] Fig. 11 is an enlarged view of D1 in Fig. 10 according to the present application;

[0052] Fig. 12 is a structural view of an embodiment of a housing according to the present application;

[0053] Fig. 13 is an enlarged view of an embodiment of D3 in Fig. 12 according to the present application;

[0054] Fig. 14 is a structural view of another embodiment of a battery cell according to the present application.

[0055] The reference signs in the detailed description are as follows: 1 vehicle; 11 motor; 12 controller; 13 battery; 10 battery cell; 100 housing; A2 accommodating groove; X first direction; Y second direction; 100a first wall; 100b protrusion; S1 first surface; S2 second surface; S3 third surface; 110 shell; 111 side wall; 112 bottom wall; 120 end cover assembly; 200 electrode assembly; 300 patch assembly; 310 main body part; 310a first insulating layer; 311 protective layer; 3111 patch layer; 3112 adhesive layer; 320 peripheral part; 330 bonding structure; 400 insulating film; 20 box body; 21 first box body; 22 second box body. DETAILED DESCRIPTION

[0056] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore cannot be used to limit the protection scope of the present application.

[0057] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the embodiments of the present application should be understood as the usual meanings understood by the persons skilled in the art to which the embodiments of the present application belong.

[0058] In the description of the embodiments of the present application, the orientations or positional relationships indicated by the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0059] In addition, the technical terms "first", "second" and the like are only for descriptive purposes and cannot 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 "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0060] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixedly connected, can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0061] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0062] At present, from the development of market situation, the application of power battery is more and more widely. The power battery is not only applied to the energy storage power supply system of hydroelectric, thermal, wind and solar power stations, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0063] In the battery technology, at least one of the top wall or the bottom wall of the shell of the battery cell is provided with a patch assembly, which is used to maintain insulation between the battery cell and the adjacent battery cell, or to maintain insulation between the battery cell and the box. However, in the related art, in order to protect the mold for making the top wall or the bottom wall, the side of the top wall or the bottom wall of the shell away from the electrode assembly is often provided with a protrusion, and the patch assembly is generally lapped on the protrusion. The above setting makes the distance between the patch assembly and the top wall or the bottom wall too large, increases the risk of insulation failure of the battery cell, and affects the reliability of the battery cell.

[0064] Based on the above considerations, in order to solve the above problems, it is found through research that the above problems can be solved by the structure of the battery cell. Specifically, a battery cell is provided, which comprises a shell, an electrode assembly and a patch assembly. The shell has a cavity, and the shell comprises a first wall, a protrusion is arranged on the side of the first wall away from the cavity, and the protrusion and the first wall form an accommodating groove. The electrode assembly is arranged in the cavity. The patch assembly is arranged on the side of the first wall away from the cavity, and the patch assembly is at least partially arranged in the accommodating groove.

[0065] The battery cell provided by an embodiment of the present application reduces the distance between the patch assembly and the first wall by arranging the patch assembly at least in the accommodating groove, shortens the stroke that can play an insulating role between the patch assembly and the first wall, and thus reduces the risk of insulation failure of the battery cell.

[0066] An embodiment of the present application provides a power consumption device using a battery as a power source. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy and an electric plane toy, and the spacecraft can include an airplane, a rocket, a space shuttle and a spacecraft.

[0067] The following embodiments are described with reference to a power consumption device as a vehicle for convenience of description.

[0068] Please refer to FIG. 1, which is a structural schematic diagram of an embodiment of a vehicle of the present application. The 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 a range extended vehicle, etc. The vehicle 1 is internally provided with a battery 13, which can be arranged at the bottom, the head, or the tail of the vehicle 1. The battery 13 can be used for power supply of the vehicle 1, for example, the battery 13 can be used as an operating power source of the vehicle 1. The vehicle 1 can further include a controller 12 and a motor 11, the controller 12 being used to control the battery 13 to supply power to the motor 11, for example, for the working power demand of the vehicle 1 during starting, navigation, and driving.

[0069] Please refer to FIG. 2, which is an exploded schematic 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 be used as an operating power source of the vehicle 1, but also be used as a driving power source of the vehicle 1, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1.

[0070] The battery 13 referred to in the embodiments of the present application refers to a single physical module including one or more battery monomers 10 to provide higher voltage and capacity. When there are multiple battery monomers 10, the multiple battery monomers 10 are connected in series, in parallel, or in a mixed manner through a current combining component.

[0071] In some embodiments, the battery 13 can be a battery module; when there are multiple battery monomers 10, the multiple battery monomers 10 are arranged and fixed to form a battery module.

[0072] In some embodiments, the battery 13 can be a battery pack, which includes a box 20 and battery monomers 10, the battery monomers 10 or the battery module being contained in the box 20.

[0073] The box 20 can adopt various structures. In some embodiments, the box 20 can include a first box 21 and a second box 22, the first box 21 and the second box 22 being mutually coverable, the first box 21 and the second box 22 together defining a containing space for containing the battery monomers 10. The second box 22 can be a hollow structure with one end open, and the first box 21 can be a plate-like structure, the first box 21 being coverable on the open side of the second box 22 to make the first box 21 and the second box 22 together define the containing space; the first box 21 and the second box 22 can also be hollow structures with one side open, the open side of the first box 21 being coverable on the open side of the second box 22. Of course, the box 20 formed by the first box 21 and the second box 22 can be of various shapes, such as a cylinder, a cuboid, etc.

[0074] In some embodiments, the box 20 can be part of the chassis structure of the vehicle 1. For example, part of the box 20 can be at least part of the floor of the vehicle 1, or part of the box 20 can be at least part of the cross beams and longitudinal beams of the vehicle 1.

[0075] In some embodiments, the battery 13 can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0076] In the battery 13, the battery cells 10 can be multiple, and the multiple battery cells 10 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that there are both series and parallel connections among the multiple battery cells 10. The multiple battery cells 10 can be directly connected in series, in parallel, or in a mixed connection, and then the whole of the multiple battery cells 10 is accommodated in the box 20; of course, the battery 13 can also be that the multiple battery cells 10 are first connected in series, in parallel, or in a mixed connection to form a battery 13 module, and then the multiple battery 13 modules are connected in series, in parallel, or in a mixed connection to form a whole, and are accommodated in the box 20. The battery 13 can also include other structures, for example, the battery 13 can also include a current combing component for realizing the electrical connection between the multiple battery cells 10.

[0077] Please refer to FIGS. 3-9, FIG. 3 is a structural schematic diagram of part of an embodiment of the battery cell 10 of the present application, FIG. 4 is an exploded schematic diagram of part of an embodiment of the battery cell 10 of the present application, FIG. 5 is a top view schematic diagram of an embodiment of the battery cell 10 of the present application, FIG. 6 is a sectional view schematic diagram of FIG. 5 along the direction of A-A, and FIG. 7 is an enlarged schematic diagram of an embodiment of D2 in FIG. 6.

[0078] In the embodiments of the present application, the battery cell 10 can be a secondary battery cell 10, which means that the battery cell 10 can be activated by charging after discharging to continue to be used.

[0079] The embodiments of the present application provide a battery cell 10, which includes a shell 100, an electrode assembly 200, and a patch assembly 300. The shell 100 has a cavity, and the shell 100 includes a first wall 100a, a protrusion 100b is arranged on the side of the first wall 100a away from the cavity, and the protrusion 100b and the first wall 100a form an accommodation groove A2, and the electrode assembly 200 is arranged in the cavity. The patch assembly 300 is arranged on the side of the first wall 100a away from the cavity, and the patch assembly 300 is at least partially arranged in the accommodation groove A2.

[0080] Optionally, the shell 100 comprises a housing 110, a cover assembly 120, the housing 110 comprises a side wall 111, a bottom wall 112, the bottom wall 112 is arranged opposite to the cover assembly 120 along a first direction X. The protrusion 100b is arranged on at least one of the cover assembly 120 or the bottom wall 112.

[0081] In some embodiments, the housing 110 is a component for cooperating with the cover assembly 120 to form an 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 housing 110 and the cover assembly 120 can be independent components, an opening can be arranged on the housing 110, and the cover assembly 120 is used to cover the opening to form the internal environment of the battery cell 10. Without limitation, the cover assembly 120 and the housing 110 can also be integrated, specifically, the cover assembly 120 and the housing 110 can form a common connecting surface before other components enter the housing, and when it is necessary to seal the internal environment of the housing 110, the cover assembly 120 is used to cover the housing 110. The housing 110 can be in various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the housing 110 can be determined according to the specific shape and size of the electrode assembly. The material of the housing 110 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations.

[0082] In some embodiments, the cover assembly 120 refers to a component for covering the opening of the housing 110 to isolate the internal environment of the battery cell 10 from the external environment. Without limitation, the shape of the cover assembly 120 can be adapted to the shape of the housing 110 to cooperate with the housing 110. Optionally, the cover assembly 120 can be made of a material with certain hardness and strength (such as aluminum alloy), so that the cover assembly 120 is not easy to deform when subjected to extrusion and collision, so that the battery cell 10 can have higher structural strength, and the safety performance can also be improved. Functional components such as electrode terminals can be arranged on the cover assembly 120. The electrode terminals can be used for electrical connection with the electrode assembly for output or input of the electrical energy of the battery cell 10. In some embodiments, a pressure relief mechanism for relieving the internal pressure of the battery cell 10 when the internal pressure or temperature reaches a threshold value can also be arranged on the cover assembly 120. The material of the cover assembly 120 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not make special limitations. In some embodiments, an insulating piece can also be arranged on the inner side of the cover assembly 120, which can be used to isolate the electrical connection components in the housing 110 from the cover assembly 120 to reduce the risk of short circuit. Exemplarily, the insulating piece can be plastic, rubber, etc.

[0083] Optionally, the end cover assembly 120 comprises an end cover sheet, and the protrusion 100b is arranged on the end cover sheet.

[0084] The patch assembly 300 is arranged at least partially in the accommodating groove A2.

[0085] Optionally, the material of the patch assembly 300 comprises an insulating material. For example, rubber, plastic material, etc.

[0086] The first wall 100a refers to at least one of the wall surfaces arranged at the end cover sheet of the end cover assembly 120 or the bottom wall 112 of the housing 110. Optionally, the structure of the first wall 100a comprises a flat plate structure.

[0087] The protrusion 100b refers to a protruding structure on the first wall 100a. The protrusion 100b can comprise at least one protruding unit, and the protrusion 100b can be an integral structure with the first wall 100a.

[0088] The accommodating groove A2 refers to a groove enclosed between the protrusion 100b and the first wall 100a. The first wall 100a constitutes the bottom wall 112 of the accommodating groove A2, and the surface of the protrusion 100b facing the first wall 100a constitutes the side wall of the accommodating groove A2. The shape of the accommodating groove A2 comprises but is not limited to a cuboid groove, a square groove, and other special-shaped groove, etc.

[0089] According to an embodiment of the present application, the battery monomer 10 is arranged at least in the accommodating groove A2 through the patch assembly 300, thereby reducing the distance between the patch assembly 300 and the first wall 100a, shortening the stroke in which the patch assembly 300 and the first wall 100a can play an insulating role, and reducing the risk of insulation failure of the battery monomer 10.

[0090] Please refer to FIGS. 8-11. FIG. 8 is an enlarged schematic view of another embodiment of D2 in FIG. 6 of the present application. FIG. 9 is an enlarged schematic view of still another embodiment of D2 in FIG. 6 of the present application. FIG. 10 is a cross-sectional view of the battery monomer 10 from another perspective. FIG. 11 is an enlarged schematic view of D1 in FIG. 10 of the present application.

[0091] In some embodiments, the patch assembly 300 comprises a main body 310, which is at least partially embedded in the accommodating groove A2, and the orthographic projection of the main body 310 on the first wall 100a is located in the accommodating groove A2.

[0092] In the first direction X, the main body 310 can be higher than the protrusion 100b, lower than the protrusion 100b, or aligned with the protrusion 100b.

[0093] The main body 310 and the protrusion 100b can be arranged separately.

[0094] The battery monomer 10 provided by the embodiment of the application is arranged by the main body 310 on the first wall 100a through the positive projection of the main body 310 on the receiving groove A2, and the main body 310 is embedded in the receiving groove A2 when the main body 310 is assembled, so that the difficulty of alignment in the assembly process of the patch assembly 300 can be reduced on the basis of shortening the distance between the main body 310 and the first wall 100a, and the assembly process is simplified.

[0095] In some embodiments, the main body 310 comprises a first insulating layer 310a, and the first insulating layer 310a is at least partially located in the receiving groove A2 and connected with the first wall 100a.

[0096] The first insulating layer 310a can be directly connected with the first wall 100a or indirectly connected with the first wall 100a.

[0097] If the first insulating layer 310a is directly connected with the first wall 100a, the first insulating layer 310a can be connected with the first wall 100a through hot melting or hot pressing; if the first insulating layer 310a is indirectly connected with the first wall 100a, an insulating film 400 can be arranged between the first insulating layer 310a and the first wall 100a, and the insulating film 400 is connected with the first wall 100a and the first insulating layer 310a respectively.

[0098] The battery monomer 10 provided by the embodiment of the application is arranged by the first insulating layer 310a, so that the assembly of the patch assembly 300 is facilitated, the assembly process is simplified, and the installation process of the battery monomer 10 is reduced.

[0099] In some embodiments, the main body 310 comprises two or more layers of protective layers 311 arranged in a stack, and at least one of the protective layers 311 is located in the receiving groove A2.

[0100] The structure of the protective layer 311 can comprise at least one of an adhesive layer 3112 or a glue layer.

[0101] One of the protective layers 311 can be arranged in the receiving groove A2, or both of the protective layers 311 can be arranged in the receiving groove A2.

[0102] The battery monomer 10 provided by the embodiment of the application is arranged by the two or more layers of protective layers 311 arranged in a stack, so that the first wall 100a can be protected by multiple layers, 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.

[0103] In some embodiments, the two or more layers of protective layers 311 comprise 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 with the first wall 100a.

[0104] The structure of the bonding layer 3112 includes but is not limited to an insulating adhesive structure.

[0105] The battery monomer 10 provided by an embodiment of the present application can facilitate the bonding of the patch assembly 300 to the first wall 100a by the bonding layer 3112 and the patch layer 3111, simplify the connection process, and improve the connection strength between the patch assembly 300 and the first wall 100a on the basis of ensuring multi-level insulation protection, thereby reducing the risk of separation of the patch assembly 300 and the first wall 100a.

[0106] In some embodiments, the main body part 310 is arranged between the orthographic projection of the first wall 100a and the orthographic projection of the protrusion 100b on the first wall 100a.

[0107] Optionally, the interval between the orthographic projection of the main body part 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. For example, the interval between the two is 0.5 mm, 1.0 mm, 1.5 mm, 2.0 mm, etc.

[0108] The battery monomer 10 provided by an embodiment of the present application can reduce the probability of misoperation during assembly of the main body part 310 so that the main body part 310 is entirely overlapped with the protrusion 100b, thereby improving the assembly accuracy.

[0109] In some embodiments, the patch assembly 300 further includes a peripheral part 320 arranged around and connected to the main body part 310. The peripheral part 320 is arranged on the side of the protrusion 100b away from the first wall 100a and covers the protrusion 100b.

[0110] The peripheral part 320 can be arranged on at least or all of the side of the protrusion 100b away from the first wall 100a.

[0111] The battery monomer 10 provided by an embodiment of the present application can wrap the position of the protrusion 100b by the arrangement of the peripheral part 320, increase the protection of the protrusion 100b, reduce the probability of damage to the position of the protrusion 100b, and increase the insulation effect between the protrusion 100b and the outside of the battery monomer 10.

[0112] In some embodiments, at least part of the peripheral part 320 and the main body part 310 are an integral structure.

[0113] For example, when the main body part 310 includes two or more layers of stacked protective layers 311, the peripheral part 320 and the protective layer 311 farthest from the first wall 100a are an integral structure.

[0114] The battery monomer 10 provided by an embodiment of the present application can be integrally manufactured with the peripheral portion 320 and at least part of the main body portion 310 by arranging the peripheral portion 320 and at least part of the main body portion 310 as an integral structure, thereby simplifying the process of manufacturing the patch assembly 300, and when assembling the peripheral portion 320, the peripheral portion 320 can be assembled together with the main body portion 310, thereby simplifying the assembly process and saving the manufacturing and assembly processes of the battery monomer 10.

[0115] Please refer to FIGS. 8 to 13, FIG. 12 is a structural schematic diagram of an embodiment of the shell of the present application, and FIG. 13 is an enlarged schematic diagram of D3 in FIG. 12.

[0116] In some embodiments, the shell 100 further comprises an insulating film 400, the insulating film 400 is wrapped on at least part of the shell 110, the insulating film 400 covers the protrusion 100b and extends on part of the first wall 100a, a containing groove is formed between the insulating film 400 and the first wall 100a, and part of the patch assembly 300 located in the containing groove is overlapped with the insulating film 400.

[0117] The insulating film 400 can be wrapped on the side wall 111 and at least part of the bottom wall 112 or at least part of the end cover assembly 120 of the shell 110.

[0118] The length dimension of the insulating film 400 extending on the first wall 100a can be adjusted according to actual conditions.

[0119] The battery monomer 10 provided by an embodiment of the present application can be integrally manufactured with the peripheral portion 320 and at least part of the main body portion 310 by arranging the peripheral portion 320 and at least part of the main body portion 310 as an integral structure, thereby simplifying the process of manufacturing the patch assembly 300, and when assembling the peripheral portion 320, the peripheral portion 320 can be assembled together with the main body portion 310, thereby simplifying the assembly process and saving the manufacturing and assembly processes of the battery monomer 10.

[0120] In some embodiments, the first wall 100a has a positive projection in the first direction X as a rounded rectangle, the inner and outer contours of the protrusion 100b enclose a pattern which is also 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 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, and the third surface S3 is consistent with the extension direction of the first wall 100a. The number of layers of the insulating film 400 covering the second surface S2 and the third surface S3 at each rounded corner of the protrusion 100b is three, at least part of the insulating film 400 extending on the first wall 100a is three layers, and the part of the patch assembly 300 located in the accommodation groove is lapped onto the three layers of the insulating film 400.

[0121] In order to facilitate the setting of the insulating film 400, in the actual manufacturing process, the end of the insulating film 400 in the first direction X can be protruding 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, directly realizing the covering of the insulating film 400 on the outer surface of the shell 110, without the need to cut the excess insulating film 400 at each rounded corner of the protrusion 100b, saving the cutting process and reducing the assembly cost of the insulating film 400.

[0122] Since the insulating film 400 is in a ring structure, when the insulating film 400 is bent to part of the surface of the first wall 100a, although at each side of the protrusion 100b, the insulating film 400 is directly bent on part of the first wall 100a, the second surface S2, and the third surface S3 to form a layer of insulating film structure, at the rounded corner where the two adjacent sides of the protrusion 100b intersect, after the insulating film 400 of one side is bent to part 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 of the other side will be bent to form a double-layer insulating film under the extrusion action, and cover the layer of insulating film of the aforementioned side, to jointly form a three-layer insulating film structure.

[0123] For the above insulating film structure, by lapping the part of the patch assembly 300 located in the accommodation groove A2 onto the three-layer insulating film structure at the rounded corner, compared with the way of lapping onto the one-layer insulating film structure corresponding to each side of the protrusion 100b, the risk of direct contact between the patch assembly 300 and the first wall 100a can be reduced, and the insulation reliability of the battery monomer can be improved.

[0124] In some embodiments, the length of the insulating film 400 extending on the first wall 100a is between 0.5 mm and 20 mm, and the distance between the part of the patch assembly 300 located in the accommodation groove A2 and the protrusion 100b is greater than or equal to 0.5 mm.

[0125] The length dimension of the insulating film 400 extending from the first wall 100a includes 0.5 mm, 5 mm, 10 mm, 20 mm, etc.

[0126] If the length dimension of the insulating film 400 extending from the first wall 100a includes 0.5 mm, the insulating film 400 can wrap each position of the protrusion 100b; if the length dimension of the insulating film 400 extending from the first wall 100a includes 10 mm, the insulating film 400 can wrap each position of the protrusion 100b and reduce the adverse effect of the setting of the insulating film 400 on the weight density of the battery monomer 10; if the length dimension of the insulating film 400 extending from the first wall 100a includes 20 mm, the insulating film 400 can wrap each position of the protrusion 100b and reduce the effect of the insulating film 400 on the weight density of the battery monomer 10. The battery monomer 10 provided by an embodiment of the application sets the length dimension of the insulating film 400 extending from the first wall 100a to be between 0.5 mm and 20 mm, so that the insulating film 400 can wrap each position of the protrusion 100b and will not cover the first wall 100a too long to increase the weight density of the battery monomer 10, and at the same time, the distance between the part of the patch assembly 300 arranged in the accommodating groove A2 and the protrusion 100b is greater than or equal to 0.5 mm after the patch assembly 300 is overlapped on the insulating film 400, so that the patch assembly 300 can avoid the protrusion 100b and is more convenient to set, thereby reducing the risk of insulation failure of the battery monomer 10 and ensuring the insulation reliability of the battery monomer 10.

[0127] The battery cell 10 includes a shell 100, an electrode assembly 200, and a patch assembly 300. The shell 100 has a cavity, and includes a first wall 100a provided with a protrusion 100b on a side facing away from the cavity, the protrusion 100b and the first wall 100a form an accommodation groove A2, and the electrode assembly 200 is arranged in the cavity. The patch assembly 300 is arranged on the side of the first wall 100a facing away from the cavity, and at least partially arranged in the accommodation groove A2. The patch assembly 300 includes a main body 310, which is at least partially embedded in the accommodation groove A2, and the orthographic projection of the main body 310 on the first wall 100a is located in the accommodation groove A2. The main body 310 includes a first insulating layer 310a, which is at least partially located in the accommodation groove A2 and connected with the first wall 100a. Or the main body 310 includes two or more protective layers 311 stacked, and at least one protective layer 311 is located in the accommodation 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 with the first wall 100a. The orthographic projection of the main body 310 on the first wall 100a is arranged between the orthographic projection of the protrusion 100b on the first wall 100a. The shell 100 includes a housing 110 and an end cover assembly 120. The housing 110 includes a side wall 111 and a bottom wall 112, the side wall 111 is connected with the bottom wall 112, and the end cover assembly 120 is arranged opposite to the bottom wall 112 along a first direction X and connected with the side wall 111. 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 part of the housing 110, covers the protrusion 100b and extends in the accommodation groove A2, and part 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 form a rounded rectangle, and the protrusion 100b includes a first face S1, a second face S2, and a third face S3. The first face S1 extends along the first direction X and is aligned with and connected to the side wall 111. The second face S2 at least partially extends along the first direction X and is connected to the first wall 100a. The third face S3 is located between the first face S1 and the second face S2, and the third face S3 is consistent with the extension direction of the first wall 100a. The insulating film 400 covering the second face S2 and the third face S3 at each corner of the protrusion 100b has three layers, and at least part of the insulating film 400 extending in the accommodation groove A2 has three layers. The length of the insulating film 400 extending in the accommodation groove A2 is between 0.5 mm and 20 mm.

[0128] Please refer to FIG. 14, which is a structural schematic diagram of another embodiment of the battery cell 10 of the present application.

[0129] In some embodiments, along the second direction Y, the patch assembly 300 at least partially comprises a bonding structure 330, the bonding structure 330 is provided with a bonding layer on the side close to the first wall 100a and the side away from the first wall 100a, and the second direction Y intersects the first direction X.

[0130] The shape of the bonding structure 330 in the orthographic projection of the first wall 100a includes but is not limited to a square, a circle, etc.

[0131] The battery monomer 10 provided by an embodiment of the present application can facilitate the installation of other components on the side of the bonding structure 330 away from the first wall 100a by the arrangement of the bonding structure 330, without the need to re-arrange other structures with adhesion.

[0132] In some embodiments, along the first direction X, the patch assembly 300 is provided with a plurality of avoiding holes configured to install electrode terminals and pressure relief assemblies, and along the second direction Y, the bonding structure 330 is located on at least one side of the avoiding holes.

[0133] The battery monomer 10 provided by an embodiment of the present application can avoid the avoiding holes by the arrangement of the position of the bonding structure 330, and has little influence on the normal use of the electrode terminals and the pressure relief assemblies, and the structure is reasonably arranged.

[0134] In some embodiments, the shell 100 comprises a housing 110 and an end cover assembly 120. The housing 110 comprises a side wall 111 and a bottom wall 112, the side wall 111 is connected with the bottom wall 112, the end cover assembly 120 is arranged opposite to the bottom wall 112 along the first direction X and connected with the side wall 111, and at least one of the bottom wall 112 and the end cover assembly 120 comprises the first wall 100a.

[0135] The battery monomer 10 provided by an embodiment of the present application facilitates the installation and protection of the electrode assembly by the arrangement of the housing 110 and the end cover assembly 120, and facilitates the protection of at least one of the bottom wall 112 and the end cover assembly 120 by the patch assembly 300 by arranging at least one of the bottom wall 112 and the end cover assembly 120 to comprise the first wall 100a, thereby reducing the risk of insulation failure of the battery monomer 10 and ensuring the reliability of the battery monomer 10.

[0136] The embodiment of the present application also provides a battery 13 comprising the battery monomer 10 of any of the above embodiments.

[0137] The battery 13 comprises a plurality of battery monomers 10.

[0138] The battery 13 provided by the embodiment of the present application can reduce the distance between the first wall 100a and the patch assembly 300 by setting the position of the patch assembly 300, thereby improving the insulation effect between the battery monomers 10 in the battery 13, increasing the insulation effect between the battery monomers 10 and the box 20 in the battery 13, and improving the reliability of the battery 13.

[0139] The embodiment of the present application further provides a power consumption device including the battery 13 of any of the above embodiments.

[0140] The power consumption device provided by the embodiment of the present application improves the insulation effect of the battery 13 in the power consumption device by the above battery 13, thereby improving the user experience.

[0141] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the specification of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery cell, wherein, The shell comprises: a cavity, the shell comprising a first wall, a protrusion being arranged on a side of the first wall away from the cavity, the protrusion and the first wall enclosing a receiving groove; an electrode assembly arranged in the cavity; a patch assembly arranged on a side of the first wall away from the cavity, the patch assembly being arranged at least partially in the receiving groove.

2. The battery cell of claim 1, wherein, The patch assembly comprises a main body part, the main body part being at least partially embedded in the receiving groove, a projection of the main body part on the first wall being located in the receiving groove.

3. The battery cell of claim 2, wherein, The main body part comprises a first insulating layer, the first insulating layer being at least partially located in the receiving groove and connected with the first wall.

4. The battery cell of claim 2, wherein, The main body part comprises two or more protective layers arranged in layers, at least one of the protective layers being located in the receiving groove.

5. The battery cell of claim 4, wherein, The two or more protective layers comprise a patch layer and an adhesive layer, the adhesive layer being located between the patch layer and the first wall, and the adhesive layer being connected with the first wall.

6. The battery cell of claim 2, wherein, The projection of the main body part on the first wall is arranged between the projection of the protrusion on the first wall.

7. The battery cell of any one of claims 2 to 6, wherein, The patch assembly further comprises a peripheral part, the peripheral part being arranged around the main body part and connected with the main body part, the peripheral part being arranged on a side of the protrusion away from the first wall and covering the protrusion.

8. The battery cell of claim 7, wherein, The peripheral part and at least part of the main body part are an integral structure.

9. The battery cell of any one of claims 1 to 8, wherein, In a second direction, the patch assembly at least partially comprises a bonding structure, the bonding structure having a bonding layer on a surface close to the first wall and a surface away from the first wall, and the second direction intersects the first direction.

10. The battery cell of claim 9, wherein, In the first direction, the patch assembly is provided with a plurality of avoiding holes configured to mount electrode terminals and pressure relief assemblies, and in the second direction, the bonding structure is located on at least one side of the avoiding holes.

11. The battery cell of any one of claims 1-10, wherein, The shell comprises: a housing comprising a side wall and a bottom wall connected with the side wall; an end cover assembly arranged opposite to the bottom wall in a first direction and connected with the side wall, at least one of the bottom wall and the end cover assembly comprising the first wall.

12. The battery cell of claim 11, wherein, The shell further comprises an insulating film covering at least part of the housing, the insulating film covering the protrusion and extending on part of the first wall, the receiving groove being formed between the insulating film and the first wall, and part of the patch assembly located in the receiving groove being lapped on the insulating film.

13. The battery cell of claim 12, wherein, In the first direction, a projection of the first wall is a rounded rectangle, and an inner and outer contour of the protrusion encloses a rounded rectangle, The protrusion comprises a first face, a second face, and a third face, the first face extending in the first direction and aligned with and connected to the side wall, the second face extending at least partially in the first direction and connected to the first wall, and the third face being located between the first face and the second face, the third face being consistent with the extension direction of the first wall, the second face and the third face covering each rounded corner of the protrusion, the insulating film having three layers, at least part of the insulating film extending on the first wall having three layers, and part of the patch assembly located in the receiving groove being lapped on the three layers of the insulating film.

14. The battery cell of claim 12, wherein, The length dimension of the insulating film extended from the first wall is between 0.5mm and 20mm, and the distance between the part of the patch assembly located in the accommodating groove and the protrusion is greater than or equal to 0.5mm.

15. A battery, wherein, A battery including the battery cell of any one of claims 1 to 14.

16. An electrical device, comprising: A battery including the battery of claim 15.

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