Battery device and electric device

Abstract

The utility model is applicable to the technical field of batteries, and provides a battery device and a power utilization device, the battery device comprises: a box body, the box body comprises a first box body and a second box body, the first box body is a concrete structural member, the first box body is provided with an accommodating space with an opening at one end, and the second box body is connected to the first box body and covers the opening of the accommodating space; a battery cell accommodated in the accommodation space; the sealing structure is arranged between the first box body and the second box body, and the two ends of the sealing structure abut against the first box body and the second box body in a sealed mode respectively; in the battery device provided by the embodiment of the invention, the first box body is a concrete structural member, and the weight of the first box body is increased, so that the battery device can be used for energy supply and can also be used as a counterweight; meanwhile, the sealing structure is arranged between the first box body and the second box body, so that the sealing performance of the connecting part of the first box body and the second box body is improved, and the negative influence on the sealing performance of the battery device caused by the fact that the first box body is a concrete structural part is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device. BACKGROUND

[0002] 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 environmental protection advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] At present, the purpose of the design of the box body of the battery device is to reduce the overall weight of the battery device. In the field of heavy engineering machinery, the engineering machinery needs to be provided with an additional counterweight in order to maintain balance during operation. When the engineering machinery is installed with a battery device for energy supply, not only the counterweight needs to be installed, but also the battery device needs to be installed, which not only occupies space but also increases cost. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the application provides a battery device and a power utilization device, which can solve the demand of engineering machinery for space occupation and counterweight.

[0005] In the first aspect, the application provides a battery device, comprising:

[0006] The box body comprises a first box body and a second box body. The first box body is a concrete structural member. The first box body has an accommodating space with an open end. The second box body is connected to the first box body and covers the opening of the accommodating space. The battery monomer is accommodated in the accommodating space. The sealing structure is arranged between the first box body and the second box body, and the two ends of the sealing structure are respectively sealed and abutted against the first box body and the second box body.

[0007] In the technical scheme of the embodiment, the first box body is a concrete structural member, which increases the weight of the first box body, so that the battery device can not only be used for energy supply but also be used as a counterweight, thereby saving space. At the same time, the sealing structure is arranged between the first box body and the second box body, which improves the sealing performance of the connecting part of the first box body and the second box body and reduces the negative influence of the first box body being a concrete structural member on the sealing performance of the battery device.

[0008] In some embodiments, the sealing structure comprises sealing glue, and the two sides of the sealing glue are respectively bonded to the first box body and the second box body.

[0009] The sealing structure comprises the sealing glue, the sealing glue can flow and fill the pores on the surface of the first box and the second box before solidification, so that the sealing performance of the connecting part of the first box and the second box can be improved; meanwhile, the sealing glue can also bond the first box to the second box, at this time, the first box and the second box can be connected through the sealing glue, so that the connecting structure between the first box and the second box can be saved, or the connecting stability between the first box and the second box can be improved.

[0010] In some embodiments, the side wall of the first box is provided with a first groove at one end facing the second box, and at least part of the sealing glue is located in the first groove.

[0011] In the technical scheme of the embodiment, the first groove is arranged on the second box to accommodate at least part of the sealing glue, so as to play a role in assisting in fixing the sealing glue; meanwhile, the first groove can also play a role in limiting the flow of the liquid sealing glue before the sealing glue is formed.

[0012] In some embodiments, the side wall of the first box is provided with a first wall and a second wall at one end facing the second box, the first wall is located at one side of the sealing glue facing the containing space, and the second wall is located at one side of the sealing glue away from the containing space; the first wall and the second wall enclose the first groove.

[0013] The technical scheme of the embodiment provides a specific structure of the first groove, so that the first groove can limit the flow of the liquid sealing glue and play a role in fixing and limiting during the process of solidification of the sealing glue and formation of the sealing glue.

[0014] In some embodiments, the height of the first wall is less than the height of the second wall.

[0015] In the technical scheme of the embodiment, the height of the first wall is less than the height of the second wall, which can guide the sealing glue overflowing from the first groove to flow to the inside of the box during the process of forming the sealing glue, so as to reduce the negative influence of the sealing solidified part exposed outside the box on the flatness of the box after solidification, and increase the contact area of the sealing glue and the second box.

[0016] In some embodiments, the sealing structure comprises a sealing gasket, and two sides of the sealing gasket abut against the first box and the second box, respectively.

[0017] In the technical scheme of the embodiment, the sealing structure comprises the sealing gasket, the sealing gasket can deform and fill the gap between the first box and the second box, and can deform and abut against the first box and the second box to seal the gap between the first box and the second box, so as to improve the sealing performance between the first box and the second box.

[0018] In some embodiments, the first box is provided with a second groove on the side facing the second box, and at least part of the sealing gasket is located in the second groove.

[0019] In the technical solution of the embodiment, the second groove is arranged on the second box to accommodate at least part of the sealing gasket, thereby assisting in fixing the sealing gasket.

[0020] In some embodiments, the first box is provided with a third wall and a fourth wall on the side facing the second box, the third wall is located on the side of the sealing gasket facing the accommodation space, and the fourth wall is located on the side of the sealing gasket away from the accommodation space; the third wall and the fourth wall enclose the second groove.

[0021] The technical solution of the embodiment provides specific structures of the second groove, so that the second groove can assist in fixing the sealing gasket and can position the sealing gasket during the connection of the second box to the first box.

[0022] In some embodiments, the second box is bonded to the first box.

[0023] In the technical solution of the embodiment, the second box is bonded to the first box to connect the second box to the first box; meanwhile, during the bonding of the first box and the second box, the glue can fill the pores on the surface of the first box and the surface of the second box, and can fill the gap between the first box and the sealing gasket and the gap between the second box and the sealing gasket, thereby further improving the sealing performance between the first box and the second box.

[0024] In some embodiments, the first box is provided with a fifth wall on the side facing the second box, the fifth wall is located on the side of the sealing structure away from the accommodation space, and at least part of the sealing structure abuts against the surface of the fifth wall facing the accommodation space.

[0025] In the technical solution of the embodiment, the fifth wall is arranged to assist in fixing the position of the sealing structure and to position the sealing structure during the connection of the second box to the first box.

[0026] In some embodiments, the first box is provided with a first connecting structure, and the second box is connected to the first box through a second connecting structure cooperating with the first connecting structure.

[0027] In the technical solution of the embodiment, the first connecting structure and the second connecting structure are arranged to cooperate with each other to connect the second box to the first box through the first connecting structure and the second connecting structure.

[0028] In some embodiments, the first connecting structure includes a fixing member embedded in the first box, and the fixing member is provided with a threaded structure; the second connecting structure includes a bolt, and the bolt passes through the second box and threadedly cooperates with the threaded structure.

[0029] The technical scheme of the embodiment provides specific structures of the first connecting structure and the second connecting structure, so that the second box body can be connected to the first box body.

[0030] In some embodiments, the second box body is provided with a coating layer on a side facing the first box body, the coating layer covering at least a portion of the second box body corresponding to the sealing structure; and / or the first box body is provided with a coating layer on a side facing the second box body, the coating layer covering at least a portion of the first box body corresponding to the sealing structure; and the sealing structure abuts against the coating layer.

[0031] In the technical scheme of the embodiment, the coating layer is arranged on the first box body and / or the second box body to further improve the sealing effect in cooperation with the sealing structure.

[0032] In some embodiments, the surface roughness of the coating layer is less than the surface roughness of a surface of the first box body facing the second box body; and / or the surface roughness of the coating layer is less than the surface roughness of a surface of the second box body facing the first box body.

[0033] In the technical scheme of the embodiment, the surface roughness of the coating layer is less than the surface roughness of a surface of the second box body facing the first box body, so as to reduce the roughness of the portions of the first box body and the second box body in contact with the sealing structure, thereby further improving the sealing effect of the sealing structure.

[0034] In some embodiments, the first box body is a cement concrete structural member.

[0035] In the technical scheme of the embodiment, the first box body is a cement concrete structural member, so that the first box body can have high strength, good durability and low cost.

[0036] In some embodiments, the second box body is a concrete structural member.

[0037] In the technical scheme of the embodiment, the second box body is also a concrete structural member, so as to further improve the overall weight of the battery device.

[0038] In a second aspect, the embodiments of the present application also provide a power utilization device comprising the battery device provided by some embodiments of the first aspect.

[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, features 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] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments with reference made to the accompanying drawings. The drawings are for purposes of illustration only and are not intended to be limiting in

[0041] Figure 1 A schematic structural diagram of a vehicle provided for some embodiments of the present application;

[0042] Figure 2 An exploded schematic structural diagram of a battery device provided for some embodiments of the present application;

[0043] Figure 3 An exploded schematic structural diagram of a box and sealing structure provided for some embodiments of the present application;

[0044] Figure 4 A perspective schematic diagram of a first box provided for some embodiments of the present application;

[0045] Figure 5 A partial cross-sectional schematic diagram at line A-A in Figure 4

[0046] A partial cross-sectional schematic diagram at line B-B in Figure 6

[0047] A perspective schematic diagram of a first box provided for some embodiments of the present application; Figure 7 Figure 6 A partial cross-sectional schematic diagram at line C-C in

[0048] Figure 8 An exploded schematic structural diagram of a first box and sealing structure provided for some embodiments of the present application;

[0049] Figure 9 A perspective schematic diagram of a first box provided for some embodiments of the present application;

[0050] Figure 10 A partial cross-sectional schematic diagram at line D-D in Figure 9

[0051] A perspective schematic diagram of a first box provided for some embodiments of the present application; Figure 11

[0052] A partial cross-sectional schematic diagram at line C-C in Figure 12 Figure 11 A perspective schematic diagram of a fixing structure provided for some embodiments of the present application.

[0053] Figure 13 The meanings of the marks in the figures are:

[0054] The meanings of the marks in the figures are: ​​

[0055] 1000, vehicle;

[0056] 100, battery device;

[0057] 10, box; 11, first box; 111, accommodation space; 112, first groove; 1121, first wall; 1122, second wall; 113, second groove; 1131, third wall; 1132, fourth wall; 114, fifth wall; 115, first connecting structure; 1151, fixing member; 1152, threaded structure; 12, second box;

[0058] 20, battery cell;

[0059] 30, sealing structure; 31, sealing glue; 32, sealing gasket;

[0060] 200, motor;

[0061] 300, controller. DETAILED DESCRIPTION

[0062] 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 only serve as examples, and cannot limit the protection scope of the present application.

[0063] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0064] 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 "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0065] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0066] In the description of the embodiments of the present application, the term "and / or" is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are an "or" relationship.

[0067] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0068] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0069] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it 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.

[0070] At present, from the development of market situation, the application of battery device is more and more widely. The battery device is not only applied to energy storage power supply systems such as hydroelectric, thermal, wind and solar power stations, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, as well as military equipment, aerospace and other fields. With the continuous expansion of the application field of battery device, its market demand is also increasing.

[0071] At present, the material of the box body of the battery device is mainly metal, plastic, composite material and the like. For commercial vehicles or passenger vehicles, this setting can reduce the weight of the battery device, thereby bringing certain advantages to the total weight and energy consumption of the vehicle.

[0072] However, for heavy engineering machinery, additional counterweights need to be provided for the engineering machinery to maintain balance during operation. When the engineering machinery is installed with a battery device for energy supply, not only the counterweights need to be installed, but also the battery device, which not only occupies space but also increases cost.

[0073] In view of the above problems, the battery device provided by the embodiments of the present application includes a first box body and a second box body, the first box body is a concrete structural member, the weight of the first box body is increased, so that the battery device can be used not only for energy supply but also as a counterweight, thereby saving space.

[0074] In the case that the first box body is a concrete structural member, the surface roughness of the concrete structural member is usually high, and pores are prone to exist on the surface of the concrete structural member. Accordingly, in the battery device provided by the embodiments of the present application, a sealing structure is further provided between the first box body and the second box body, the sealing performance of the connecting part of the first box body and the second box body is improved, and the negative influence of the first box body being a concrete structural member on the sealing performance of the battery device is reduced.

[0075] The battery device disclosed by the embodiments of the present application can be used in various energy storage systems using the battery device as a power source or an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc., and the spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0076] The following embodiments are described by taking a vehicle as an example for convenience of description, the vehicle can be an engineering vehicle.

[0077] Reference Figure 1 , Figure 1 A structural schematic diagram of a vehicle 1000 provided by some embodiments of the present application is shown. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery can be used for power supply of the vehicle 1000, for example, the battery can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 300 and a motor 200, the controller 300 is used to control the battery to supply power to the motor 200, for example, for the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0078] In some embodiments of the present application, the battery can not only serve as the operating power source of the vehicle 1000, but also serve as the driving power source of the vehicle 1000, replacing or partially replacing the fuel or natural gas to provide driving power for the vehicle 1000.

[0079] Reference Figure 2 , Figure 2 An exploded structural schematic diagram of the battery device 100 provided for some embodiments of the present application is shown. The battery device 100 mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 20 connected in series, in parallel, or in a mixed connection through a busbar component.

[0080] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells 20.

[0081] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells 20 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 20 with a cable tie.

[0082] In some embodiments, the battery device 100 can be a battery pack including a box 10 and one or more battery cell assemblies housed in the box 10.

[0083] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the box 10 by fixing the battery module in the box 10.

[0084] As an example, the battery cell assembly can also be housed in the box 10 by directly fixing a plurality of battery cells 20 in the box 10.

[0085] As an example, the box 10 can include a first box 11 and a second box 12. The first box 11 and the second box 12 are buckled so that an enclosed space is formed inside the box 10 to accommodate the battery cell assembly. Here, enclosed means covered or closed, which can be sealed or unsealed. The first box 11 can be a top cover or a bottom plate.

[0086] As an example, the box 10 can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame so that an enclosed space is formed inside the box 10 to accommodate the battery cell assembly.

[0087] In some embodiments, the box 10 can be part of the chassis structure of the vehicle 1000. For example, part of the box 10 can be at least part of the floor of the vehicle 1000, or part of the box 10 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0088] In a first aspect, referring to Figure 3 、 Figure 8 In some embodiments of the present application, a battery device 100 includes a box 10, a battery cell 20, and a sealing structure 30. The box 10 includes a first box 11 and a second box 12. The first box 11 is a concrete structural member having an open-ended receiving space 111. The second box 12 is connected to the first box 11 and covers the opening of the receiving space 111. The battery cell 20 is received in the receiving space 111. The sealing structure 30 is arranged between the first box 11 and the second box 12 and seals against the first box 11 and the second box 12 at both ends.

[0089] The box 10 refers to a structure in the battery device 100 for providing a receiving space 111 for the battery cell 20 and other structures.

[0090] The first box 11 refers to a structure in the box 10 for carrying the battery cell 20 or other structures. In the case where the box 10 includes the first box 11 and the second box 12, the first box 11 is used to receive the battery cell assembly and other structures, and the second box 12 is used to cover and seal the first box 11. According to the shape of the box 10, the first box 11 can be prismatic, cylindrical, or other shapes. The material of the first box 11 can include metal, plastic, or other materials.

[0091] The receiving space 111 refers to a space structure in the first box 11 for receiving the battery cell 20 or other structures. The receiving space 111 can be a prismatic space structure, a cylindrical space structure, or other shapes of space structures. The shape of the receiving space 111 can also be set according to the shape of the first box 11.

[0092] The receiving space 111 has an opening at one end, and the battery cell 20 or other structures can be placed into the receiving space 111 through the opening. The shape of the opening can be circular, square, or other shapes. The shape of the opening can be adapted to the shape of the receiving space 111, or it can be different from the shape of the receiving space 111.

[0093] The first box 11 is a concrete structural member, i.e., the main material of the first box 11 is concrete. Concrete refers to a man-made stone material formed by mixing cementitious materials, water, and aggregates in a certain proportion and hardening. It has the advantages of high strength, large mass, and good durability.

[0094] The second box body 12 refers to a structure for closing the accommodation space 111 in the box body 10. The second box body 12 can be connected to the first box body 11 and covers the opening to close the accommodation space 111, reducing the negative impact of the external environment on the battery monomer 20 or other structures in the accommodation space 111. The shape of the second box body 12 can be circular, square or other shapes. The shape of the second box body 12 can also be set according to the shape of the first box body 11. The second box body 12 can be a plate structure or a hollow structure with one end open. The second box body 12 is connected to the first box body 11. The second box body 12 can be connected to the first box body 11 by bonding, screwing or other means. The material of the second box body 12 can include metal, plastic or other materials.

[0095] It can be understood that in the case of the first box body 11 being a concrete structural member, the second box body 12 can be a concrete structural member, a metal structural member, a plastic structural member or a structural member of other materials.

[0096] Compared with the current metal box body, plastic box body and other structures, the first box body 11 of the embodiment is a concrete structural member to increase the overall weight of the battery device 100. At this time, the battery device 100 can not only provide power for the corresponding engineering machinery, but also increase the balance performance and stability of the engineering machinery as a counterweight. In the case of the first box body 11 being a concrete structural member, the weight and volume of the counterweight on the engineering machinery can be correspondingly reduced, or the counterweight can be completely omitted, thereby reducing the space occupation of the counterweight and improving the space utilization rate on the engineering machinery.

[0097] The battery monomer 20 refers to the smallest unit that constitutes the battery device 100. The number of battery monomers 20 can be one, two or more. In the case of the number of battery monomers 20 being at least two, each battery monomer 20 can be connected in series, parallel or mixed. Each battery monomer 20 can be arranged in one direction or arrayed in two different directions. Each battery monomer 20 can be fixed and constrained by a binding belt, a plate or other structures. Each battery monomer 20 can also be directly arranged in the accommodation space 111 of the first box body 11.

[0098] The sealing structure 30 refers to a structure for sealing the gap between the first box body 11 and the second box body 12 in the battery device 100. The sealing structure 30 can be an annular structure to surround the opening of the accommodation space 111 and be located between the first box body 11 and the second box body 12. The sealing structure 30 can also be a plate structure or a structural member of other shapes. The sealing structure 30 can be a rubber member or other structural member, or a structure formed by curing sealing glue, welding or other structures.

[0099] In an example, when the first box 11 is a concrete structural member, a metal member can be embedded in the first box 11, and the second box 12 can be a metal structural member, and the second box 12 can be welded to the metal member of the first box 11, and the welded structure can be used as the sealing structure 30.

[0100] In an example, the sealing structure 30 can be a rubber member, and when the first box 11 is connected to the second box 12, the rubber member can be deformed under pressure, and the restoring force of the rubber member can make the rubber member more tightly abut against the first box 11 and the second box 12, thereby sealing the gap between the first box 11 and the second box 12.

[0101] The sealing structure 30 is arranged between the first box 11 and the second box 12, and the two ends of the sealing structure 30 are respectively sealed against the first box 11 and the second box 12 to seal the gap between the first box 11 and the second box 12. According to the specific structure of the sealing structure 30, the sealing structure 30 can be directly connected to the first box 11 and the second box 12, can be clamped by the first box 11 and the second box 12, or can be fixed between the first box 11 and the second box 12 through the connecting structure of the first box 11 and the second box 12.

[0102] In the case that the first box 11 is a concrete structural member, the surface roughness of the first box 11 is relatively high, and the surface of the first box 11 usually has microstructures such as pores, which can cause poor sealing between the first box 11 and the second box 12. Accordingly, the sealing structure 30 is arranged between the first box 11 and the second box 12 to improve the sealing performance of the connection part of the first box 11 and the second box 12.

[0103] In the embodiment, the first box 11 is a concrete structural member, which increases the weight of the first box 11, so that the battery device 100 can be used not only for energy supply but also as a counterweight, thereby saving space. Meanwhile, the sealing structure 30 is arranged between the first box 11 and the second box 12 to improve the sealing performance of the connection part of the first box 11 and the second box 12, thereby reducing the negative impact of the first box 11 being a concrete structural member on the sealing performance of the battery device 100.

[0104] Reference Figure 3 In some embodiments, the sealing structure 30 includes a sealing glue 31, and the two sides of the sealing glue 31 are respectively bonded to the first box 11 and the second box 12.

[0105] The sealing glue 31 refers to a structure formed after the liquid sealing glue is cured. The sealing glue 31 can include a rubber sealing glue, a resin sealing glue or other types of sealing glue. Depending on the type of the sealing glue 31, the liquid sealing glue can be cured by heat curing, moisture curing, anaerobic curing or other ways to form the sealing glue 31.

[0106] The sealing glue 31 can fill the gap between the first box 11 and the second box 12 to seal the gap between the first box 11 and the second box 12. The sealing glue 31 can also bond the second box 12 to the first box 11 to connect the second box 12 to the first box 11. When the sealing glue is in a liquid state, the sealing glue can fill the pores on the surface of the first box 11. When the liquid sealing glue is cured to form the sealing glue 31, the sealing glue 31 can fill the pores on the surface of the first box 11, thereby better improving the sealing performance between the first box 11 and the second box 12.

[0107] For example, during the installation of the second box 12 on the first box 11, the liquid sealing glue is first applied to the surface of the first box 11 facing the second box 12 and connected to the second box 12. At this time, the liquid sealing glue flows and fills the pores on the surface of the first box 11. Then, the second box 12 is placed on the first box 11 and contacts the sealing glue. At this time, the sealing glue fills the gap between the first box 11 and the second box 12. Then, the liquid sealing glue is cured to form the sealing glue 31. After the sealing glue curing agent is cured and becomes a solid structure, the sealing glue 31 can seal the gap between the first box 11 and the second box 12 and connect the second box 12 to the first box 11.

[0108] In this embodiment, the sealing structure 30 includes the sealing glue 31. Before curing, the sealing glue 31 can flow and fill the pores on the surface of the first box 11 and the second box 12, thereby improving the sealing performance of the connection part between the first box 11 and the second box 12. Meanwhile, the sealing glue 31 can also bond the first box 11 to the second box 12. At this time, the first box 11 and the second box 12 can be connected through the sealing glue 31, thereby saving the connection structure between the first box 11 and the second box 12 or improving the connection stability between the first box 11 and the second box 12.

[0109] Reference Figures 3 to 5 In some embodiments, the side wall of the first box 11 has a first groove 112 at one end facing the second box 12. At least part of the sealing glue 31 is located in the first groove 112.

[0110] The first groove 112 refers to a groove structure arranged on the side wall of the first box body 11, and the side wall of the first box body 11 refers to a structure for providing side protection and support for the battery monomer 20. In the case where the second box body 12 is connected to the first box body 11, the end of the side wall of the first box body 11 connected to the second box body 12.

[0111] The first groove 112 is arranged at the end of the side wall of the first box body 11 connected to the second box body 12, and the first groove 112 is used for positioning the sealing glue 31. The first groove 112 can be a closed ring structure connected head to tail around the opening. According to the shape of the opening, the first groove 112 can be a square ring groove structure, a circular ring groove structure, or a closed ring structure of other shapes. The first groove 112 can also be a straight groove structure or a groove structure of other shapes. The cross-sectional shape of the first groove 112 can be square, triangular, semicircular, or other shapes.

[0112] At least part of the sealing glue 31 is located in the first groove 112, that is, the sealing glue 31 can be located only partially in the first groove 112, or can be located completely in the first groove 112. For example, in the case where the sealing glue 31 is completely located in the first groove 112, the second box body 12 abuts against the side wall of the first groove 112 and closes the first groove 112, so that the sealing glue 31 can be connected to the second box body 12.

[0113] For example, the first groove 112 is a square ring groove structure. Before the sealing glue 31 solidifies, liquid sealing glue can be injected into the first groove 112. Then, the second box body 12 is placed on the first box body 11, and the sealing glue is bonded to the second box body 12. At this time, part of the sealing glue can overflow outside the first groove 112. After the liquid sealing glue solidifies and forms the sealing glue 31, part of the sealing glue 31 is located in the first groove 112, and the other part is located outside the first groove 112. The sealing glue 31 is connected to the first box body 11 and the second box body 12.

[0114] In this embodiment, the first groove 112 is arranged on the second box body 12 to accommodate at least part of the sealing glue 31, thereby assisting in fixing the sealing glue 31. At the same time, before the sealing glue 31 is formed, the first groove 112 can also limit the flow of liquid sealing glue.

[0115] Reference Figures 3 to 5 In some embodiments, the end of the side wall of the first box body 11 connected to the second box body 12 is provided with a first wall 1121 and a second wall 1122. The first wall 1121 is located on the side of the sealing glue 31 facing the containing space 111, and the second wall 1122 is located on the side of the sealing glue 31 away from the containing space 111. The first wall 1121 and the second wall 1122 enclose the first groove 112.

[0116] The first wall 1121 and the second wall 1122 refer to structures of the first box body 11 surrounding the first groove 112, and the first groove 112 is formed between the first wall 1121 and the second wall 1122. The first wall 1121 and the second wall 1122 are structures of the side wall of the first box body 11 towards one end of the second box body 12. According to the shape of the first groove 112, the first wall 1121 and the second wall 1122 can be linear structures, or can be arc structures or multi-segment structures surrounding the opening. The first wall 1121 and the second wall 1122 can be structures formed after grooving on the first box body 11, or can be structures connected to the first box body 11.

[0117] The first wall 1121 and the second wall 1122 are arranged in sequence along a direction from the containing space 111 to outside of the box body 10, that is, the first wall 1121 is located on a side of the second wall 1122 towards the containing space 111, and the second wall 1122 is located on a side of the first wall 1121 away from the containing space 111. After the sealing glue 31 is located in the first groove 112, the first wall 1121 is located on a side of the sealing glue 31 towards the containing space 111, and the second wall 1122 is located on a side of the sealing glue 31 away from the containing space 111.

[0118] The embodiment provides some specific structures of the first groove 112, so that the first groove 112 can limit the flow of the liquid sealing glue, and can play a fixing and limiting role in the process of solidification of the liquid sealing glue and formation of the sealing glue 31.

[0119] Reference Figures 3 to 5 In some embodiments, the height of the first wall 1121 is less than the height of the second wall 1122.

[0120] The height of the first wall 1121 is less than the height of the second wall 1122, and the height of the first wall 1121 and the second wall 1122 refers to the dimension of the first wall 1121 and the second wall 1122 protruding from the first box body 11. Reference Figure 5 The height difference between the first wall 1121 and the second wall 1122 is the dimension H shown in the figure. Under this setting, in the case that the liquid sealing glue overflows the first groove 112, the liquid sealing glue will first overflow into the containing space 111, so as to reduce the risk of the sealing glue overflowing to the outer surface of the box body 10.

[0121] In the case that the second box 12 abuts against the first box 11, the second box 12 abuts against the second wall 1122 and is spaced apart from the first wall 1121, so that the sealant can flow from the gap between the first wall 1121 and the second box 12 to the inside of the containing space 111, thereby reducing the risk of the sealant overflowing out of the box 10; at the same time, this arrangement can also enable a part of the sealant 31 to be located between the first wall 1121 and the second box 12, increasing the contact area between the sealant 31 and the second box 12 and better improving the sealing effect of the sealant 31.

[0122] The overflow of the sealant out of the box 10 can cause a part of the sealant 31 to be exposed outside the box 10, which can easily cause the sealant 31 to act as a conductive structure, thereby increasing the risk of an electric circuit and causing stress concentration. Accordingly, in the present embodiment, the height of the first wall 1121 is less than the height of the second wall 1122, which can guide the sealant overflowing from the first groove 112 to flow to the inside of the box 10 during the molding of the sealant 31, thereby reducing the negative impact of the sealant 31 exposed outside the box 10 on the flatness of the box 10 after solidification and increasing the contact area between the sealant and the second box 12.

[0123] Reference Figure 8 In some embodiments, the sealing structure 30 includes a sealing gasket 32, and the two sides of the sealing gasket 32 abut against the first box 11 and the second box 12, respectively.

[0124] The sealing gasket 32 refers to a structure for sealing the gap between the first box 11 and the second box 12. The sealing gasket 32 can be a ring-shaped structure, such as a square ring-shaped structure, a circular ring-shaped structure or other shaped structures, or a plate-shaped structure or a strip-shaped structure. The material of the sealing gasket 32 can include rubber, fiber material or other materials.

[0125] The sealing gasket 32 can fill the gap between the first box 11 and the second box 12 to seal the gap between the first box 11 and the second box 12. The sealing gasket 32 has a certain elasticity. In the case that the second box 12 is connected to the first box 11, the sealing gasket 32 is compressed and deformed, and the deformed sealing gasket 32 has a tendency to return to its original shape due to its elasticity, so that the sealing gasket 32 can better fit the first box 11 and the second box 12, thereby playing a role in sealing the gap between the first box 11 and the second box 12.

[0126] In the process of mounting the second box body 12 to the first box body 11, the sealing gasket 32 is first placed on the first box body 11, and then the second box body 12 is placed on the first box body 11 and connected to the first box body 11, at this time, the sealing gasket 32 is deformed under pressure, and the deformed sealing gasket 32 has a tendency to return to its original shape due to its elasticity, so that the two ends of the sealing gasket 32 can be sealed and held against the first box body 11 and the second box body 12, respectively.

[0127] In the embodiment, the sealing structure 30 includes the sealing gasket 32, which can be deformed and fill the gap between the first box body 11 and the second box body 12, and can be deformed and held against the first box body 11 and the second box body 12 to seal the gap between the first box body 11 and the second box body 12, thereby improving the sealing performance between the first box body 11 and the second box body 12.

[0128] Reference Figures 8 to 10 In some embodiments, the side of the first box body 11 facing the second box body 12 is provided with a second groove 113, and at least part of the sealing gasket 32 is located in the second groove 113.

[0129] The second groove 113 refers to a groove structure provided on the first box body 11, and the second groove 113 is provided on the side of the first box body 11 facing the second box body 12, and the second groove 113 is used for positioning the sealing gasket 32; the second groove 113 can be a closed ring structure connected head to tail around the opening, according to the shape of the opening, the second groove 113 can be a square ring groove structure, a circular ring groove structure or other shapes of closed ring structure, the second groove 113 can also be a straight groove structure or other shapes of groove structure; the cross-sectional shape of the second groove 113 can be square, triangular, semicircular or other shapes.

[0130] At least part of the sealing gasket 32 is located in the second groove 113, that is, the sealing gasket 32 can be only partially located in the second groove 113, or can be completely located in the second groove 113; in the case that the sealing gasket 32 is completely located in the second groove 113, the second box body 12 is held against the side wall of the second groove 113 and closes the second groove 113, so that the sealing gasket 32 can be connected to the second box body 12.

[0131] In the process of connecting the second box body 12 to the first box body 11, the second groove 113 can position the sealing gasket 32, thereby reducing the risk of deviation of the sealing gasket 32.

[0132] For example, the second groove 113 is a square ring groove structure, and a part of the gasket 32 is located in the second groove 113, and another part of the gasket 32 is located outside the second groove 113; after the second box 12 is connected to the first box 11, the gasket 32 is deformed under pressure and is sealed against the second box 12, the side wall of the first groove 112 and the bottom wall of the first groove 112.

[0133] In the embodiment, the second groove 113 is arranged on the second box 12 to accommodate at least part of the gasket 32 through the second groove 113, thereby playing a role of assisting in fixing the gasket 32.

[0134] Reference Figures 8 to 10 In some embodiments, the first box 11 is provided with a third wall 1131 and a fourth wall 1132 on a side of the first box 11 facing the second box 12, the third wall 1131 is located on a side of the gasket 32 facing the accommodation space 111, and the fourth wall 1132 is located on a side of the gasket 32 away from the accommodation space 111; the third wall 1131 and the fourth wall 1132 enclose the second groove 113.

[0135] The third wall 1131 and the fourth wall 1132 refer to structures on the first box 11 enclosing the second groove 113, and the second groove 113 is formed between the third wall 1131 and the fourth wall 1132; the third wall 1131 and the fourth wall 1132 are structures on a side of the first box 11 facing the second box 12, and according to the shape of the second groove 113, the third wall 1131 and the fourth wall 1132 can be a straight line structure, or an arc structure or a multi-segment structure surrounding an opening; the third wall 1131 and the fourth wall 1132 can be structures formed after grooving on the first box 11, or structures connected to the first box 11.

[0136] The third wall 1131 and the fourth wall 1132 are arranged in sequence in a direction from the accommodation space 111 to outside the box 10, that is, the third wall 1131 is located on a side of the fourth wall 1132 facing the accommodation space 111, and the fourth wall 1132 is located on a side of the third wall 1131 away from the accommodation space 111; after the gasket 32 is located in the second groove 113, the third wall 1131 is located on a side of the gasket 32 facing the accommodation space 111, and the fourth wall 1132 is located on a side of the gasket 32 away from the accommodation space 111.

[0137] The embodiment provides some specific structures of the second groove 113, so that the second groove 113 can play a role of assisting in fixing the gasket 32, and can play a role of positioning the gasket 32 during connection of the second box 12 to the first box 11.

[0138] In some embodiments, the second box 12 is bonded to the first box 11.

[0139] The second box 12 is bonded to the first box 11, and the second box 12 can be bonded to the first box 11 by a sealant. The sealant can include a rubber sealant, a resin sealant, or other types of sealants. After the liquid sealant is cured, the sealant 31 is formed. At this time, the first box 11 and the second box 12 are simultaneously provided with the seal gasket 32 and the sealant 31. The seal gasket 32 has a certain strength and better elasticity, and the sealant 31 can better fill the pores on the surface of the first box 11. The combination of the seal gasket 32 and the sealant 31 can better seal the gap between the first box 11 and the second box 12.

[0140] In the embodiment, the second box 12 is bonded to the first box 11 to connect the second box 12 to the first box 11. During the process of bonding the first box 11 and the second box 12 by the sealant, the sealant can fill the pores on the surface of the first box 11 and the surface of the second box 12, and can fill the gap between the first box 11 and the seal gasket 32 and between the second box 12 and the seal gasket 32, thereby further improving the sealing performance between the first box 11 and the second box 12.

[0141] Reference Figure 6 , Figure 7 , Figure 11 , Figure 12 In some embodiments, the first box 11 is provided with a fifth wall 114 on the side facing the second box 12. The fifth wall 114 is located on the side of the sealing structure 30 away from the accommodation space 111, and at least part of the sealing structure 30 abuts against the surface of the fifth wall 114 facing the accommodation space 111.

[0142] The fifth wall 114 refers to a structure protruding on the side of the first box 11 facing the second box 12. The fifth wall 114 is a structure on the side of the first box 11 facing the second box 12. The fifth wall 114 can be a straight line structure, or an arc structure or a multi-segment structure surrounding the opening. The fifth wall 114 can be a structure formed after grooving on the first box 11, or a structure connected to the first box 11.

[0143] For example, when the opening is square, the fifth wall 114 is a multi-segment structure and the fifth wall 114 is a square ring structure.

[0144] The sealing structure 30 can abut against the surface of the fifth wall 114 facing the accommodation space 111 and be located on the side of the fifth wall 114 facing the accommodation space 111, so as to assist in positioning the position of the sealing structure 30 by the fifth wall 114.

[0145] At least part of the sealing structure 30 abuts against the surface of the fifth wall 114 facing the accommodation space 111, that is, the sealing structure 30 can completely abut against the surface of the fifth wall 114 facing the accommodation space 111, or can only partially abut against the surface of the fifth wall 114 facing the accommodation space 111, in which case the other part of the fifth wall 114 can extend to other positions of the fifth wall 114 and abut against other surfaces of the fifth wall 114. For example, the sealing structure 30 only partially abuts against the surface of the fifth wall 114 facing the accommodation space 111, and the other part of the sealing structure 30 extends between the fifth wall 114 and the second box body 12 and abuts against the surface of the fifth wall 114 facing the second box body 12.

[0146] The height of the sealing structure 30 is greater than or equal to the height of the fifth wall 114, and the height of the sealing structure 30 can be higher than the height of the fifth wall 114, so that the sealing structure 30 can be connected to the first box body 11 and the second box body 12 at the same time; or the height of the sealing structure 30 can be equal to the height of the fifth wall 114, in which case the second box body 12 abuts against the fifth wall 114, so that the sealing structure 30 can be connected to the second box body 12.

[0147] In the case of the sealing structure 30 being the sealing glue 31, the height of the sealing structure 30 refers to the height after the liquid sealing glue is cured and formed, and also refers to the height of the cured sealing glue 31 formed after the second box body 12 is connected to the first box body 11 and extrudes the liquid sealing glue; in the case that the height of the sealing structure 30 is higher than the height of the fifth wall 114, part of the sealing glue 31 overflows between the fifth wall 114 and the second box body 12; in the case that the height of the sealing structure 30 is equal to the height of the fifth wall 114, the sealing glue 31 is only located on the side of the fifth wall 114 facing the accommodation space 111.

[0148] In the case of the sealing structure 30 being the sealing gasket 32, the height of the sealing structure 30 refers to the height of the sealing gasket 32 after the second box body 12 is connected to the first box body 11 and extrudes the sealing gasket 32; in the case that the height of the sealing structure 30 is higher than the height of the fifth wall 114, part of the sealing gasket 32 is located between the fifth wall 114 and the second box body 12; in the case that the height of the sealing structure 30 is equal to the height of the fifth wall 114, the sealing gasket 32 is only located on the side of the fifth wall 114 facing the accommodation space 111.

[0149] For example, when the sealing structure 30 is a sealing glue, the liquid sealing glue is coated on the side of the first box 11 facing the second box 12, and the liquid sealing glue is also on the side of the fifth wall 114 facing the accommodating space 111. Because the sealing glue has a certain viscosity, the height of the sealing glue can be higher than the height of the fifth wall 114. Then, the second box 12 is placed on the first box 11, and the sealing glue is bonded with the second box 12. At this time, part of the sealing glue can overflow into the accommodating groove, thereby reducing the amount of sealing glue overflowing outside the box 10. After the liquid sealing glue solidifies, the two ends of the sealing glue 31 are connected to the first box 11 and the second box 12, respectively.

[0150] For example, during the installation of the second box 12 on the first box 11, the sealing gasket 32 is first placed on the first box 11, so that the height of the sealing gasket 32 is higher than the height of the fifth wall 114. At this time, the sealing gasket 32 is also on the side of the fifth wall 114 facing the accommodating space 111, that is, the sealing gasket 32 is on the inner side of the fifth wall 114. Then, the second box 12 is placed on the first box 11, and the second box 12 is connected to the first box 11. At this time, the sealing gasket 32 is deformed under pressure, and the deformed sealing gasket 32 has a tendency to return to its original shape due to its elasticity, so that the two ends of the sealing gasket 32 can be sealed against the first box 11 and the second box 12, respectively.

[0151] In this embodiment, the fifth wall 114 is provided to assist in fixing the position of the sealing structure 30 and to play a positioning role in the process of connecting the second box 12 to the first box 11.

[0152] Reference Figure 8 , Figure 12 , Figure 13 In some embodiments, the first box 11 is provided with a first connecting structure 115, and the second box 12 is connected to the first box 11 through a second connecting structure cooperating with the first connecting structure 115.

[0153] The first connecting structure 115 and the second connecting structure refer to structures that can cooperate with each other and be connected. The first connecting structure 115 and the second connecting structure are used to connect the second box 12 to the first box 11. The first connecting structure 115 is provided on the first box 11. The first connecting structure 115 can include buckles, nuts, sockets or other structures. Correspondingly, the second connecting structure can include buckles, bolts, plugs or other structures cooperating with the first connecting structure 115. The number of the first connecting structure 115 and the second connecting structure can be one, two or more. The material of the first connecting structure 115 and the second connecting structure can include metal, plastic or other materials.

[0154] The first connecting structure 115 is arranged on the first box body 11, and can be connected to the first box body 11 by bonding, plugging or other manners. Since the first box body 11 is a concrete structure, the first connecting structure 115 can also be inlaid on the side of the first box body 11 facing the second box body 12.

[0155] For example, when the first box body 11 is formed by pouring concrete into a mold, the first connecting structure 115 can be placed in the mold and fixed at the desired position before the first box body 11 is formed. Then, the concrete is poured into the mold, and after the concrete is solidified and formed, the first connecting structure 115 is fixedly connected to the first box body 11.

[0156] The second connecting structure can cooperate with and be connected to the first connecting structure 115 to fix the second box body 12 to the first box body 11. For example, when the first connecting structure 115 is a buckle, the second connecting structure can be a clasp, and one end of the clasp can pass through the second box body 12 and be connected and fixed with the buckle, and the other end of the clasp can press and hold the second box body 12 to the first box body 11. For example, when the first connecting structure 115 is a nut, the second connecting structure can be a bolt, and one end of the bolt can pass through the second box body 12 and be connected and fixed with the nut, and the other end of the bolt can press and hold the second box body 12 to the first box body 11.

[0157] In this embodiment, the first connecting structure 115 and the second connecting structure are arranged to cooperate with each other, so as to connect the second box body 12 to the first box body 11 through the first connecting structure 115 and the second connecting structure.

[0158] Reference Figures 11 to 13 In some embodiments, the first connecting structure 115 includes a fixing member 1151 inlaid in the first box body 11, and the fixing member 1151 is provided with a threaded structure 1152; and the second connecting structure includes a bolt, which passes through the second box body 12 and is threadedly connected with the threaded structure 1152.

[0159] The fixing member 1151 refers to a structure in the first connecting structure 115 for connecting with the first box body 11, and is also used to provide a fixing basis for the threaded structure 1152 or other structures. The fixing member 1151 can be a plate-shaped structure, a columnar structure or other shaped structures. The material of the fixing member 1151 can include metal, plastic or other materials.

[0160] The fixing member 1151 is inlaid in the first box body 11, and can be inlaid on the side of the first box body 11 facing the second box body 12, or can be inlaid inside the first box body 11, so that one end of the threaded structure 1152 faces the second box body 12 and is exposed outside the first box body 11.

[0161] In the case of the first box body 11 being formed by pouring concrete into a mold, the fixing member 1151 can be placed in the mold and fixed at the desired position before the first box body 11 is formed, and then the concrete is poured into the mold. After the concrete is cured and formed, the fixing member 1151 is embedded in the first box body 11.

[0162] The threaded structure 1152 refers to a mechanical structure for connection, transmission or sealing through threads. The threaded structure 1152 is also a structure in the first connection structure 115 for connecting with the second connection structure. The threaded structure 1152 can include a nut, a threaded sleeve or other structures. The threaded structure 1152 is arranged on the fixing member 1151 and can be connected to the fixing member 1151 by welding, bonding or other means. The number of threaded structures 1152 can be one, two or more. The material of the threaded structure 1152 can include metal, plastic or other materials.

[0163] For example, the fixing member 1151 can be a long strip-shaped structure, and a plurality of threaded structures 1152 are arranged on one fixing member 1151 along the length direction. For example, the fixing member 1151 can also be a hollow square steel structure, and a plurality of threaded structures 1152 are arranged on one fixing member 1151 along the length direction.

[0164] The bolt refers to a fastener structure with threads. The threads on the bolt can cooperate with the threads of the threaded structure 1152 to achieve fastening. The material of the bolt can include metal, plastic or other materials.

[0165] During the connection of the second box body 12 to the first box body 11, one end of the bolt can pass through the second box body 12 and threadedly cooperate with the threaded structure 1152. At this time, the other end of the bolt can press and hold the second box body 12 to the first box body 11, so that the second box body 12 is connected to the first box body 11.

[0166] It can be understood that in the case of the sealing structure 30 including the sealing glue 31, the sealing glue fixing member 1151 can also play a role in connecting the first box body 11 and the second box body 12. At this time, the arrangement of the first connection structure 115 and the second connection structure can further improve the connection stability between the first box body 11 and the second box body 12.

[0167] The present embodiment provides some specific structures of the first connection structure 115 and the second connection structure, so that the second box body 12 can be connected to the first box body 11.

[0168] In some embodiments, the second box 12 is provided with a coating layer on a side facing the first box 11, the coating layer covering at least a portion of the second box 12 corresponding to the sealing structure 30; and / or the first box 11 is provided with a coating layer on a side facing the second box 12, the coating layer covering at least a portion of the first box 11 corresponding to the sealing structure 30; the sealing structure 30 abutting against the coating layer.

[0169] The coating layer refers to a coating structure formed on the first box 11 and / or the second box 12. The coating layer can be provided on only the first box 11 or the second box 12, or provided on both the first box 11 and the second box 12. The coating layer covers at least a portion of the first box 11 or the second box 12 corresponding to the sealing structure 30, i.e., the coating layer can cover only the portion of the first box 11 or the second box 12 corresponding to the sealing structure 30, or cover other portions of the first box 11 or the second box 12, or cover the entire first box 11 or the entire second box 12.

[0170] The coating layer corresponds to the sealing structure 30, i.e., when the second box 12 is connected to the first box 11, the two ends of the sealing structure 30 abut against the coating layer of the first box 11 and / or the second box 12, to further improve the sealing performance between the sealing structure 30 and the first box 11, between the sealing structure 30 and the second box 12, and between the entire box 10.

[0171] When the first box 11 is provided with the first groove 112 or the second groove 113, at least a portion of the coating layer can cover the inner surface of the first groove 112 or the second groove 113.

[0172] The coating layer is provided to further improve the sealing performance between the sealing structure 30 and the first box 11 and / or between the sealing structure 30 and the second box 12. Accordingly, the coating layer can have high adhesion to improve the bonding performance between the sealing structure 30 and the coating layer, thereby improving the sealing performance. The coating layer can also have good sealing performance. Since the first box 11 is a concrete structural member, the concrete structural member has certain water absorption and water permeability. This setting can improve the sealing performance of the first box 11 and reduce the risk of liquid, water vapor, etc. directly entering the containing space 111 through the first box 11.

[0173] For example, the material of the coating layer can include organic fluorine, butadiene rubber, acrylic latex, organic silicon, epoxy resin, or other materials.

[0174] In this embodiment, the coating layer is provided on the first box 11 and / or the second box 12 to further improve the sealing effect in cooperation with the sealing structure 30.

[0175] In some embodiments, the surface roughness of the coating layer is less than the surface roughness of the surface of the first tank 11 facing the second tank 12; and / or, the surface roughness of the coating layer is less than the surface roughness of the surface of the second tank 12 facing the first tank 11.

[0176] In the case where the coating layer is arranged on the side of the first tank 11 facing the second tank 12, the surface roughness of the coating layer is less than the surface roughness of the first tank 11; in the case where the coating layer is arranged on the side of the second tank 12 facing the first tank 11, the surface roughness of the coating layer is less than the surface roughness of the second tank 12.

[0177] In the case where the first tank 11 is a cement structure, the surface roughness of the first tank 11 is high, and a small gap is easily formed between the contact surface of the sealing structure 30 and the first tank 11, thereby negatively affecting the sealing performance. Accordingly, the surface roughness of the coating layer is made less than the surface roughness of the first tank 11 to improve the sealing performance between the sealing structure 30 and the first tank 11.

[0178] Similarly to the first tank 11, in the case where the surface roughness of the second tank 12 is high, the surface roughness of the coating layer is made less than the surface roughness of the second tank 12 to improve the sealing performance between the sealing structure 30 and the second tank 12.

[0179] For example, the coating layer can be an epoxy coating layer.

[0180] In the present embodiment, the surface roughness of the coating layer is made less than the surface roughness of the surface of the second tank 12 facing the first tank 11 to reduce the roughness of the part of the first tank 11, the second tank 12 and the sealing structure 30 in contact, thereby further improving the sealing effect of the sealing structure 30.

[0181] In some embodiments, the first tank 11 is a cement concrete structure.

[0182] The cement concrete refers to the concrete with cement as the cementitious material. The cement concrete has the advantages of high strength, good durability, widely available raw materials, low cost and good plasticity, so that the first tank 11 can have higher strength and longer service life.

[0183] It can be understood that, in addition to the cement concrete, the first tank 11 can also be embedded with reinforcing structures such as steel bars and metal plates.

[0184] In the present embodiment, the first tank 11 is a cement concrete structure, so that the first tank 11 can have higher strength, as well as good durability and low cost.

[0185] In some embodiments, the second box 12 is a concrete structural member.

[0186] The second box 12 is a concrete structural member, i.e., the main material of the second box 12 is concrete; concrete refers to a man-made stone material formed by mixing and hardening cementitious materials, water, and aggregates in a certain proportion, which has the advantages of high strength, large mass, and good durability.

[0187] Making the second box 12 a concrete structural member can further increase the overall weight of the battery device 100, thereby further saving the additional counterweight that needs to be provided on the engineering machinery and further improving the space utilization on the engineering machinery; at the same time, this setting can further improve the overall strength and service life of the box 10.

[0188] For example, the second box 12 can be a cement concrete structural member, and cement concrete refers to concrete with cement as the cementitious material.

[0189] It can be understood that, in addition to concrete, the material of the second box 12 can also include reinforcing structures such as steel bars and metal plates embedded in cement concrete.

[0190] In this embodiment, the second box 12 is also a concrete structural member to further increase the overall weight of the battery device 100.

[0191] In some embodiments, the battery device 100 includes a box 10, battery cells 20, and a sealing structure 30.

[0192] The box 10 includes a first box 11 and a second box 12, the first box 11 has an open-ended receiving space 111, and the second box 12 is connected to the first box 11 and covers the opening; both the first box 11 and the second box 12 are cement concrete structural members.

[0193] The side of the first box 11 facing the second box 12 is provided with a first groove 112, which is a square ring-shaped closed groove structure arranged around the opening.

[0194] The side of the first box 11 facing the second box 12 is provided with a coating layer covering the inner surface of the first groove 112; the side of the second box 12 facing the first box 11 is also provided with a coating layer.

[0195] The battery cells 20 are contained in the receiving space 111.

[0196] The sealing structure 30 is a sealing glue 31 or a sealing gasket 32; part of the sealing structure 30 is located in the first groove 112, and the other part of the sealing structure 30 extends out of the first groove 112; one end of the sealing structure 30 abuts against the first box 11, and the other end of the sealing structure 30 abuts against the second box 12.

[0197] The box 10 further comprises a first connecting structure 115, which comprises a fixing member 1151 and a plurality of threaded structures 1152 connected to the fixing member 1151 and arranged at intervals along the length direction of the fixing member 1151; the fixing member 1151 is inlaid on the side of the first box 11 facing the second box 12, and the fixing member 1151 is arranged staggered with the sealing structure 30.

[0198] The box 10 further comprises a second connecting structure, which comprises a bolt matched with the threaded structure 1152, one end of the bolt penetrating through the second box 12 and being threadedly connected with the threaded structure 1152, and the other end of the bolt being pressed on the second box 12 and pressing the second box 12 on the first box 11.

[0199] In the second aspect, the embodiments of the present application further provide a power consuming device, which comprises the battery device 100 provided by some embodiments of the first aspect.

[0200] The power consuming device can be an engineering machine, such as a crane, an excavator, etc., or other power consuming devices requiring counterweights.

[0201] In the power consuming device, the battery device 100 is heavy, and can be used not only for supplying electric energy, but also as a counterweight; meanwhile, the battery device 100 also has good sealing performance.

[0202] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing 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 the embodiments 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 device, characterized by, The battery device comprises: a box body, which comprises a first box body and a second box body, the first box body being a concrete structural member, the first box body having an open receiving space, and the second box body being connected to the first box body and covering the opening of the receiving space; a battery cell contained in the receiving space; a sealing structure arranged between the first box body and the second box body, and sealingly abutting the first box body and the second box body at both ends, respectively.

2. The battery device according to claim 1, characterized by The sealing structure comprises sealing glue, and both sides of the sealing glue are bonded to the first box body and the second box body, respectively.

3. The battery device of claim 2, wherein, An end of a side wall of the first box body towards the second box body is provided with a first groove, and at least part of the sealing glue is located in the first groove.

4. The battery device of claim 3, wherein An end of a side wall of the first box body towards the second box body is provided with a first wall and a second wall, the first wall is located on a side of the sealing glue towards the receiving space, and the second wall is located on a side of the sealing glue away from the receiving space. The first wall and the second wall enclose the first groove.

5. The battery device of claim 4, wherein, The height of the first wall is less than the height of the second wall.

6. The battery device of claim 1, wherein The sealing structure comprises a sealing gasket, and both sides of the sealing gasket abut the first box body and the second box body, respectively.

7. The battery device of claim 6, wherein A side of the first box body towards the second box body is provided with a second groove, and at least part of the sealing gasket is located in the second groove.

8. The battery device of claim 7, wherein, A side of the first box body towards the second box body is provided with a third wall and a fourth wall, the third wall is located on a side of the sealing gasket towards the receiving space, and the fourth wall is located on a side of the sealing gasket away from the receiving space. The third wall and the fourth wall enclose the second groove.

9. The battery device of claim 6, wherein, The second box body is bonded to the first box body.

10. The battery device according to any one of claims 1-9, wherein, A side of the first box body towards the second box body is provided with a fifth wall, the fifth wall is located on a side of the sealing structure away from the receiving space, and at least part of the sealing structure abuts a surface of the fifth wall towards the receiving space.

11. The battery device according to any one of claims 1 to 9, wherein The first box body is provided with a first connecting structure, and the second box body is connected to the first box body through a second connecting structure matched with the first connecting structure.

12. The battery device of claim 11, wherein, The first connecting structure comprises a fixing member embedded in the first box body, and the fixing member is provided with a threaded structure. The second connecting structure comprises a bolt, and the bolt passes through the second box body and is threadedly matched with the threaded structure.

13. The battery device of any one of claims 1-9, wherein, A side of the second box body towards the first box body is provided with a coating layer, and the coating layer at least covers a portion of the second box body corresponding to the sealing structure; and / or A side of the first box body towards the second box body is provided with a coating layer, and the coating layer at least covers a portion of the first box body corresponding to the sealing structure; The sealing structure abuts the coating layer.

14. The battery device of claim 13, wherein, The surface roughness of the coating layer is less than the surface roughness of a surface of the first box body towards the second box body; and / or The surface roughness of the coating layer is less than the surface roughness of a surface of the second box body towards the first box body.

15. The battery device of any one of claims 1-9, wherein, The first box body is a cement concrete structural member.

16. The battery device of any one of claims 1-9, wherein, The second box body is a concrete structural member.

17. An electrical device, comprising: The battery device comprises any one of claims 1-16.

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