Battery box, battery and electrical device

Abstract

The present application provides a battery box, belonging to the field of electric box packaging. The battery box includes an upper cover and a lower box, the lower box has an opening, and is characterized in that the upper cover includes: an upper cover body, configured to cover the opening; a sealing member fixed on the back of the upper cover body, the sealing member is configured to seal the covering portion between the upper cover body and the lower box to form a sealed accommodating cavity in the lower box; and a convex structure arranged on the back of the upper cover body, the sealing member being arranged in contact with the convex structure.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are 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 advantages of energy conservation and environmental protection. At present, with the development of the electric vehicle industry, electric vehicles have become one of the important means of transportation for people, and people's requirements for the performance of electric vehicles are getting higher and higher. For electric vehicles, battery technology is an important factor related to their development.

[0003] In the related art, a battery includes a battery module and a battery case for placing the battery module, and the battery case includes a lower case and an upper cover. The life and performance of the battery will be affected by the environment, so the sealing of the battery case is crucial to ensure the life and performance of the battery. At present, battery production has gradually been automated. On the battery automation production line, the battery module is first placed in the lower case, and then the upper cover covers the opening of the lower case. How to ensure the sealing of the battery case while realizing automated battery production has become an urgent problem to be solved. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background technology. To this end, one object of the present application is to provide a battery box to improve the sealing of the battery box while achieving automated battery production.

[0005] An embodiment of the first aspect of the present application provides a battery case, comprising an upper cover and a lower case, the lower case having an opening, and characterized in that the upper cover comprises: an upper cover body, configured to cover the opening; a sealing member fixed to the back side of the upper cover body, the sealing member being configured to seal the covering portion between the upper cover body and the lower case to form a sealed accommodating cavity in the lower case; and a protruding structure arranged on the back side of the upper cover body, the sealing member being arranged in contact with the protruding structure.

[0006] In the technical solution of the embodiment of the present application, the sealing gasket can be fixed on the upper cover in advance, so that the sealing gasket can be integrated with the upper cover, so that the upper cover can be automatically pushed forward synchronously during automated production. And it is convenient to position the sealing gasket and the upper cover offline, which can avoid the problem of repeated pasting due to incorrect pasting and affecting the sealing of the battery box, and improve the assembly efficiency. In addition, the friction between the seal and the raised structure can prevent the seal from being scratched during transportation, which may cause the seal to fall off.

[0007] In some embodiments, the upper cover includes a plurality of protrusions, the seal has a plurality of first mounting holes, and the plurality of protrusions correspond to the positions of the plurality of first mounting holes. Thus, the seal sleeve is arranged on the plurality of protrusions, which can better increase the friction force on the seal, and further prevent the seal from being scratched during transportation, which may cause the seal to fall off.

[0008] In some embodiments, the seal is an annular structure extending along the outer edge of the upper cover body, and a plurality of raised structures are spaced apart along the outer edge of the upper cover body. The integrated annular seal can improve the sealing effect, and the plurality of raised structures can better increase the friction force on the sealing gasket, further preventing the seal from being scratched during transportation and possibly causing the seal to fall off.

[0009] In some embodiments, a plurality of protrusion structures are evenly distributed on the outer edge of the upper cover body, thereby better ensuring the sealing of the battery box.

[0010] In some embodiments, the side surface of the protruding structure in contact with the seal includes at least one of a plane, a slope, a curved surface, and a stepped surface, wherein the plane is perpendicular to the interface between the seal and the upper cover body, and the slope is not perpendicular to the interface between the seal and the upper cover body.

[0011] In some embodiments, the back of the seal that contacts the upper cover body is provided with adhesive, and the seal is fixed to the upper cover body by the adhesive. The sealing gasket is attached to the upper cover body by the adhesive, and has a simple structure and is easy to install.

[0012] In some embodiments, the raised structure is formed by stamping the upper cover body, and a groove is formed on the front of the upper cover body at a position corresponding to the raised structure. The raised structure includes a side contacting the seal and a convex surface adjacent to the side, and the convex surface has a second mounting hole. A third mounting hole is provided at a position corresponding to the second mounting hole of the lower box body. The upper cover body and the lower box body are connected by bolts that pass through the second mounting hole and the third mounting hole in sequence, wherein at least part of the nut of the bolt is located in the groove. The method of stamping the front of the upper cover body to form a boss on the back can form a groove on the front of the upper cover body, so that the nut, the upper cover plate, and the rivet screw can still be in contact in sequence without being suspended in the middle, thereby preventing the occurrence of quality risks caused by torque attenuation during installation.

[0013] In some embodiments, at least one of the upper cover body and the seal is provided with a positioning mark, and the seal is fixed to the back of the upper cover body by the positioning mark. By providing the positioning mark, the sealing gasket can be accurately pasted to the upper cover body. When the sealing gasket is an annular sealing ring, it can avoid the problem of incorrect assembly of the sealing ring when the length and width of the battery box are not much different, improve the assembly efficiency, and when pasting with adhesive, it can avoid the problem of repeated pasting affecting the pasting effect, and ensure that the sealing gasket is stably fixed to the upper cover body.

[0014] In some embodiments, the protruding structure is a circular boss or a rectangular boss.

[0015] An embodiment of the second aspect of the present application provides a battery, which includes a battery case and a battery module arranged in the battery case, wherein the battery case adopts the battery case in the above embodiment.

[0016] An embodiment of the third aspect of the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0017] 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

[0018] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0019] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0020] Figure 2 A schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0021] Figure 3 A schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application;

[0022] Figure 4 This is a schematic diagram of the exploded structure of a battery box in some embodiments of the present application;

[0023] Figure 5 This is a schematic diagram of the installation of a battery box in some embodiments of the present application;

[0024] Figure 6A front view of a schematic diagram of the installation of a battery box in some embodiments of the present application;

[0025] Figure 7 for Figure 6 Sectional view at AA in the middle;

[0026] Figure 8 for Figure 5 The main view of the battery box;

[0027] Fig. 9 for Figure 8 Sectional view at AA in the middle;

[0028] Fig.10 for Figure 8 Left side view of the middle battery box;

[0029] Fig.11 for Figure 8 A top view of the battery box;

[0030] Fig.12 for Figure 8 A schematic diagram of the structure of the battery box;

[0031] Fig.13 for Figure 8 A front view of the upper cover of the middle battery box;

[0032] Fig.14 for Fig.13 Left view of the middle upper cover;

[0033] Fig.15 for Fig.13 A top view of the middle upper cover;

[0034] Fig.16 for Fig.13 Schematic diagram of the structure of the middle upper cover;

[0035] Fig.17 for Figure 8 A front view of the lower box of the middle battery box;

[0036] Fig.18 for Figure 8 A left side view of the lower box of the middle battery box;

[0037] Fig.19 for Figure 8 A top view of the lower box of the middle battery box;

[0038] Fig. 20 for Figure 8 Schematic diagram of the structure of the lower box of the middle battery box.

[0039] Description of reference numerals:

[0040] Vehicles 1000;

[0041] Battery 100, controller 200, motor 300;

[0042] Battery box 10, upper cover 11, lower box 12, bolt 13, seal 14, opening 15, boss 16, upper cover body 17, first mounting hole 18, second mounting hole 31, third mounting hole 32, nut 33, groove 34;

[0043] Battery cell 20, end cover 21, electrode terminal 21a, shell 22, battery cell assembly 23, and tab 23a. DETAILED DESCRIPTION

[0044] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0045] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0046] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0047] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0048] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0049] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0050] 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, which 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0051] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0053] In the related art, a battery includes a battery module and a battery case for placing the battery module, and the battery case includes a lower case and an upper cover. The life and performance of the battery will be affected by the environment, so the sealing of the battery case is crucial to ensure the life and performance of the battery. At present, battery production has gradually been automated. On the battery automation production line, the battery module is first placed in the lower case, and then the upper cover covers the opening of the lower case. How to ensure the sealing of the battery case while realizing automated battery production has become an urgent problem to be solved.

[0054] In some embodiments, when the upper cover of the battery box is packaged, in order to ensure the sealing, a foam silicone sealing gasket can be used to seal between the lower box and the upper cover, and a large number of screws can be used to lock them.

[0055] However, the installation process and screw pre-tightening process require on-site manual installation of foam sealing gaskets on the lower box body before installing the upper cover. During the installation of the foam sealing gasket, because it is impossible to do the guide fixation in advance (for example, when the length of the lower box body is not much different, manual pasting is easy to make mistakes), repeated pasting occurs, causing the adhesive viscosity to fail and affecting the airtightness. At the same time, due to on-site installation, additional personnel are needed and the upper cover cannot be pushed towards automation synchronously.

[0056] In view of the above problems, an embodiment of the present application provides a battery case, including an upper cover and a lower case, wherein the lower case has an opening, and is characterized in that the upper cover includes: an upper cover body, configured to cover the opening; and a seal, fixed on the back of the upper cover body, the seal is configured to seal the cover between the upper cover body and the lower case to form a sealed accommodating cavity in the lower case. Thus, the sealing gasket can be fixed on the upper cover in advance, so that the sealing gasket and the upper cover can be fed as one piece, so that the upper cover can be pushed toward automation synchronously during automated production. And the positioning of the sealing gasket and the upper cover is convenient offline, which can avoid the problem of repeated pasting due to pasting errors affecting the sealing of the battery case, and improve assembly efficiency.

[0057] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, 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., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0058] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0059] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery 100 may be used to power the vehicle 1000, for example, the battery 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0060] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0061] Please refer to Figure 2 , Figure 2 An exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a battery case 10 and a battery cell 20, and the battery cell 20 is contained in the battery case 10. Among them, the battery case 10 is used to provide a storage space for the battery cell 20, and the battery case 10 can adopt a variety of structures. In some embodiments, the battery case 10 may include an upper cover 11 and a lower case 12, and the upper cover 11 and the lower case 12 cover each other, and the upper cover 11 and the lower case 12 jointly define a storage space for accommodating the battery cell 20. The lower case 12 can be a hollow structure with one end open, and the upper cover 11 can be a plate-like structure. The upper cover 11 covers the open side of the lower case 12, so that the upper cover 11 and the lower case 12 jointly define a storage space; the upper cover 11 and the lower case 12 can also be hollow structures with one side open, and the open side of the upper cover 11 covers the open side of the lower case 12. Of course, the battery case 10 formed by the upper cover 11 and the lower case 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0062] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 20 are both connected in series and in parallel. The multiple battery cells 20 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 20 is accommodated in the battery case 10; of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the battery case 10. The battery 100 may also include other structures, for example, the battery 100 may also include a busbar component for realizing electrical connection between the multiple battery cells 20.

[0063] Each battery cell 20 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0064] Please refer to Figure 3 , Figure 3 The schematic diagram of the exploded structure of the battery cell 20 provided in some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes the battery. Figure 3 The battery cell 20 includes an end cover 21, a shell 22, a battery cell assembly 23 and other functional components.

[0065] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easily deformed when squeezed and collided, so that the battery cell 20 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 21a can be provided on the end cap 21. The electrode terminal 21a can be used to electrically connect to the battery cell assembly 23 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. The material of the end cap 21 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection components in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0066] The shell 22 is a component used to cooperate with the end cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the battery cell assembly 23, electrolyte and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 20 is formed by covering the opening with the end cover 21 at the opening. Without limitation, the end cover 21 and the shell 22 can also be integrated. Specifically, the end cover 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when the interior of the shell 22 needs to be encapsulated, the end cover 21 covers the shell 22. The shell 22 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 22 can be determined according to the specific shape and size of the battery cell assembly 23. The material of the shell 22 can be various, 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.

[0067] The battery cell assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more battery cell assemblies 23 may be contained in the housing 22. The battery cell assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the battery cell assembly, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 23a. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery, the positive active material and the negative active material react with the electrolyte, and the tab 23a connects the electrode terminals to form a current loop.

[0068] The present application will be described below in conjunction with specific embodiments.

[0069] Figure 4 This is a schematic diagram of the exploded structure of a battery box in some embodiments of the present application; Figure 5 This is a schematic diagram of the installation of a battery box in some embodiments of the present application; Figure 5 This is a schematic diagram of the installation of a battery box in some embodiments of the present application; Figure 6 A front view of a schematic diagram of the installation of a battery box in some embodiments of the present application; Figure 7 for Figure 6 Cross-sectional view at AA in the middle.

[0070] Figure 8 for Figure 5 The main view of the battery box; Fig. 9 for Figure 8 Sectional view at AA in the middle; Fig.10 for Figure 8 Left side view of the middle battery box; Fig.11 for Figure 8 A top view of the battery box; Fig.12 for Figure 8 Schematic diagram of the structure of the battery box.

[0071] Please refer to Figures 4 to 12 The embodiment of the present application provides a battery case 10, including an upper cover 11 and a lower case 12, the lower case 12 having an opening 15 (only one side of the opening is shown in the figure), wherein the upper cover 11 includes an upper cover body 17 and a sealing member 14, wherein the upper cover body 17 is configured to cover the opening 15; the sealing member 14 is fixed on the back side of the upper cover body 17, and the sealing member 14 is configured to seal the covering portion between the upper cover body 17 and the lower case 12 to form a sealed accommodating cavity in the lower case 12; and a protruding structure 16 is arranged on the back side of the upper cover body 17, and the sealing member 14 is arranged in contact with the protruding structure 16.

[0072] The lower box body 12 may be, for example but not limited to, a hollow structure with one end open, and the larger opening facilitates placement of the battery module in the lower box body 12 .

[0073] The shape and size of the upper cover body 17 match the opening 15 , so that the upper cover body 17 can cover the opening 15 of the lower box body 12 .

[0074] When the lower box body 12 is a hollow structure with one end open, the sealing member 14 may be located between the back surface of the upper cover body 17 and the end surface of the lower box body 12 located on the side where the opening is located.

[0075] In some embodiments, the sealing member 14 may be fixed to the back side of the upper cover body 17 by adhesive, or by other methods such as snap fasteners.

[0076] The front of the upper cover body 17 can be stamped to form a protruding structure 16 on the back of the upper cover body 17, and a groove is formed on the front of the upper cover body 17 at a position corresponding to the protruding structure 16. It can be understood that the protruding structure 16 can also be formed on the back of the upper cover body 17 by other methods.

[0077] The sealing member 14 is disposed in contact with the protruding structure 16 , so that when the sealing member 14 is scraped, frictional force can be generated between the protruding structure 16 and the sealing member 14 .

[0078] In the solution of the embodiment of the present application, the seal 14 can be fixed on the upper cover body 17 in advance, so that the seal 14 and the upper cover body 17 are integrated (constituting the upper cover 11) during automated production, and the upper cover 11 can be pushed forward automatically synchronously. And it is convenient to position the seal 14 and the upper cover body 17 offline to avoid the problem of repeated pasting due to incorrect pasting and affecting the sealing. In addition, by forming a raised structure 16 on the back of the upper cover body 17, the friction between the seal 14 and the raised structure 16 can prevent the seal 14 from being scratched during transportation, which may cause the seal to fall off.

[0079] According to some embodiments of the present application, the upper cover 11 includes a plurality of protrusion structures 16 , the sealing member 14 has a plurality of first mounting holes 18 , and the positions of the plurality of protrusion structures 16 correspond one-to-one to the positions of the plurality of first mounting holes 18 .

[0080] That is, a plurality of protruding structures 16 can be formed on the back of the upper cover body 17, and the seal 14 is sleeved on the plurality of protruding structures 16 and fixed to the back of the upper cover body 17. The side walls of the plurality of first mounting holes 18 on the seal 14 are arranged in contact with the protruding structures 16, and when the seal 14 is scraped, a large friction force can be generated between the plurality of protruding structures 16 and the seal 14.

[0081] Therefore, the seal 14 is sleeved on the plurality of protruding structures 16 , which can increase the friction force on the seal 14 and prevent the seal 14 from falling off during the transportation of the upper cover 11 .

[0082] According to some embodiments of the present application, the sealing member 14 is an annular structure extending along the outer edge of the upper cover body 17 , and the plurality of protrusion structures 16 are distributed at intervals along the outer edge of the upper cover body 17 .

[0083] The integrated annular seal 14 can improve the sealing effect, and the plurality of protruding structures 16 can better increase the friction force on the seal 14 to prevent the seal 14 from falling off during transportation.

[0084] Fig.13 for Figure 8 A front view of the upper cover of the middle battery box; Fig.14 for Fig.13 Left view of the middle upper cover; Fig.15 for Fig.13 A top view of the middle upper cover; Fig.16 for Fig.13 Schematic diagram of the structure of the middle upper cover.

[0085] Please refer to Figures 13 to 16 According to some embodiments of the present application, a plurality of protrusion structures 16 are evenly distributed on the outer edge of the upper cover body 17 .

[0086] The multiple protrusion structures 16 evenly distributed on the outer edge of the upper cover body 17 can make the sealing member 14 evenly subjected to friction during transportation, thereby better preventing the sealing member 14 from falling off during transportation.

[0087] According to some embodiments of the present application, the side surface of the protruding structure 16 in contact with the seal 14 includes at least one of a plane, a slope, a curved surface and a step surface, wherein the plane is perpendicular to the interface in contact with the seal 14 and the upper cover body 17, and the slope is not perpendicular to the interface in contact with the seal 14 and the upper cover body 17.

[0088] It should be understood that the plane, the inclined surface, the curved surface and the stepped surface are merely examples of the side surface of the protruding structure 16 in contact with the seal 14 , and the present application does not limit the side surface of the protruding structure 16 in contact with the seal 14 .

[0089] Please continue to refer to Figure 7 According to some embodiments of the present application, the back side of the seal 14 in contact with the upper cover body 17 is provided with adhesive backing (the adhesive backing is not shown in the figure), and the seal 14 is fixed to the upper cover body 17 by the adhesive backing.

[0090] The adhesive backing may be, for example but not limited to, double-sided adhesive.

[0091] The sealing member 14 is adhered to the upper cover body 17 by adhesive, has a simple structure, and is easy to install, thereby improving production efficiency.

[0092] Fig.17 for Figure 8 A front view of the lower box of the middle battery box; Fig.18 for Figure 8 A left side view of the lower box of the middle battery box; Fig.19 for Figure 8 A top view of the lower box of the middle battery box; Fig. 20 for Figure 8 Schematic diagram of the structure of the lower box of the middle battery box.

[0093] Please refer to Figures 7 to 20 According to some embodiments of the present application, the raised structure 16 is formed by stamping the upper cover body 17, and a groove 34 is formed on the front side of the upper cover body 17 at a position corresponding to the raised structure 16, the raised structure 16 includes a side surface in contact with the seal and a convex surface adjacent to the side surface, the convex surface has a second mounting hole 31, and a third mounting hole 32 is provided at a position of the lower box body 12 corresponding to the second mounting hole 31, the upper cover body 17 and the lower box body 12 are connected by bolts 13 that sequentially penetrate the second mounting hole 31 and the third mounting hole 32, wherein at least a portion of the nut 33 of the bolt 13 is located in the groove 34.

[0094] The upper cover 11 and the lower box body 12 are fixedly connected by bolts, which has the advantages of easy installation and stable connection, and the bolt connection is convenient for controlling the gap between the upper cover 11 and the lower box body 12, so as to control the compression amount of the seal 14 and ensure the sealing effect. It can be understood that the upper cover 11 and the lower box body 12 can also be fixedly connected by welding or other methods.

[0095] The design of the boss 16 ensures that the nut 33, the upper cover body 17, and the bolt 13 are still in contact with each other in sequence without being suspended in the middle, thereby preventing the torque attenuation during the installation process from causing quality risks.

[0096] According to some embodiments of the present application, at least one of the upper cover body 17 and the seal 14 is provided with a positioning mark, and the seal 14 is fixed to the back side of the upper cover body 17 through the positioning mark.

[0097] The positioning mark may be, for example, a positioning pattern (eg, a cross) or a positioning structure (eg, convex dots arranged in a specific shape).

[0098] By setting the positioning mark, the seal 14 can be accurately pasted to the upper cover body 17. When the seal 14 is a sealing ring, it can avoid the problem of incorrect pasting of the sealing ring when the length and width of the battery box 10 are not much different. When pasting with adhesive, it can avoid the problem of repeated pasting affecting the pasting effect, ensuring that the seal 14 is stably fixed on the upper cover body 17, thereby improving production efficiency.

[0099] According to some embodiments of the present application, the protruding structure 16 is a circular boss or a rectangular boss.

[0100] It can be understood that the protruding structure 16 can also be a boss of other regular or irregular shapes, as long as it can provide a side surface that contacts with the seal and can form friction with the seal.

[0101] According to some embodiments of the present application, an embodiment of the present application provides a battery 100, including a battery case 10 and a battery module 20 disposed in the battery case 10, wherein the battery case 10 adopts the battery case 10 described in any of the above embodiments.

[0102] According to some embodiments of the present application, an electric device is provided, including the battery 100 as described in the above embodiment, and the battery 100 is used to provide electric energy. The electric device can be any of the above-mentioned devices or systems using the battery.

[0103] In a specific embodiment, the battery case 10 includes an upper cover 11 and a lower case 12, the lower case having an opening 15, wherein the upper cover 11 includes an upper cover body 17, which is configured to cover the opening 15; the battery case 10 also includes a seal 14, which is fixed to the back side of the upper cover body 17, and the seal 14 is configured to seal the covering portion between the upper cover body 17 and the lower case 12 to form a sealed accommodating cavity in the lower case 12.

[0104] The upper cover 11 may further include a plurality of raised structures 16 disposed on the back of the upper cover body 17, the sealing member 14 has a plurality of first mounting holes 18, the plurality of raised structures 16 correspond to the positions of the plurality of first mounting holes 18 one by one, and the sealing member 14 is disposed in contact with the raised structures 16. The sealing member 14 is an annular structure extending along the outer edge of the upper cover body 17, and the plurality of raised structures 16 are evenly spaced and distributed along the outer edge of the upper cover body 17. The side of the raised structure 16 in contact with the sealing member 14 may be configured as a plane, which is perpendicular to the back of the upper cover body 17.

[0105] The back of the seal 14 in contact with the upper cover body 17 may be provided with adhesive, and the seal 14 is fixed to the back of the upper cover body 17 by the adhesive. The raised structure 16 may be formed by stamping the upper cover body 17, and a groove 34 is formed on the front of the upper cover body 17 at a position corresponding to the raised structure 16.

[0106] The raised structure 16 includes a side surface in contact with the seal 14 and a convex surface adjacent to the side surface, the convex surface may be provided with a second mounting hole 31, and a third mounting hole 32 is provided at a position of the lower box body 12 corresponding to the second mounting hole 31. The upper cover body 17 and the lower box body 12 may be connected by a bolt 13 that passes through the second mounting hole 31 and the third mounting hole 32 in sequence, wherein at least a portion of the nut 33 of the bolt 13 is located in the groove 34.

[0107] The upper cover body 17 and the sealing member 14 may be provided with positioning marks, and the sealing member 14 may be fixed to the back side of the upper cover body 17 through the positioning marks.

[0108] The friction between the seal 14 and the raised structure 16 can prevent the seal 14 from falling off during transportation, so that the seal 14 can be integrated with the upper cover body 17 (constituting the upper cover 11), so that the upper cover 11 can be pushed forward automatically synchronously during automated production, and the positioning of the seal 14 and the upper cover body 17 is convenient offline, avoiding the problem of repeated pasting due to incorrect pasting and affecting the sealing.

[0109] 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 replace some or all of the technical features therein by equivalents; 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 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 box, comprising an upper cover and a lower box, wherein the lower box has an opening, characterized in that: The upper cover comprises: An upper cover body, configured to cover the opening; A sealing member fixed on the back side of the upper cover body, the sealing member being configured to seal the cover joint between the upper cover body and the lower box body to form a sealed accommodating cavity in the lower box body; and A protruding structure is arranged on the back side of the upper cover body, and the sealing member is arranged in contact with the protruding structure.

2. The battery box according to claim 1, characterized in that: The upper cover includes a plurality of the protruding structures, the sealing member has a plurality of first mounting holes, and the positions of the plurality of protruding structures correspond to the positions of the plurality of first mounting holes one by one.

3. The battery box according to claim 2, characterized in that: The sealing member is an annular structure extending along the outer edge of the upper cover body, and the plurality of protrusion structures are distributed at intervals along the outer edge of the upper cover body.

4. The battery box according to claim 3, characterized in that: The plurality of protrusion structures are evenly distributed on the outer edge of the upper cover body.

5. The battery box according to claim 1, characterized in that: The side surface of the protrusion structure in contact with the seal member includes at least one of a flat surface, an inclined surface, a curved surface and a stepped surface. The plane is perpendicular to the interface between the seal and the upper cover body, and the inclined surface is not perpendicular to the interface between the seal and the upper cover body.

6. The battery case according to any one of claims 1 to 4, characterized in that: The back surface of the sealing member in contact with the upper cover body is arranged on the adhesive backing, and the sealing member is fixed on the upper cover body by the adhesive backing.

7. The battery case according to any one of claims 1 to 4, characterized in that: The protruding structure is formed by stamping the upper cover body, and a groove is formed on the front of the upper cover body at a position corresponding to the protruding structure. The convex structure includes a side surface in contact with the sealing member and a convex surface adjacent to the side surface, the convex surface has a second mounting hole, and a third mounting hole is provided at a position of the lower box body corresponding to the second mounting hole. The upper cover body and the lower box body are connected by bolts that pass through the second mounting hole and the third mounting hole in sequence. Wherein, at least a portion of the nut of the bolt is located in the groove.

8. The battery case according to any one of claims 1 to 4, characterized in that: At least one of the upper cover body and the sealing member is provided with a positioning mark, and the sealing member is fixed on the back side of the upper cover body through the positioning mark.

9. The battery case according to any one of claims 1 to 4, characterized in that: The protruding structure is a circular boss or a rectangular boss.

10. A battery, comprising a battery box and a battery module arranged in the battery box, characterized in that: The battery case is the battery case according to any one of claims 1 to 9.

11. An electrical device, characterized in that: The electrical device comprises the battery as claimed in claim 10, and the battery is used to provide electrical energy.

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