Battery device and electric equipment

Abstract

The utility model relates to the related technical field of batteries, and discloses a battery device and electric equipment, the battery device comprises a box body and a battery monomer, the box body is provided with a containing cavity and comprises a circumferential frame and a heat exchange plate, the circumferential frame is arranged in the circumferential direction of the containing cavity in a surrounding mode, and the heat exchange plate is arranged at the first end of the containing cavity in a surrounding mode; the battery monomers are arranged in the accommodating cavities; the end face, facing the first end, of the circumferential frame is a first end face, at least part of the first end face comprises a first face and a boss part in the circumferential direction of the circumferential frame, the boss part is arranged on the side, away from the containing cavity, of the first face in a surrounding mode, the boss part is arranged away from the second end compared with the first face in the height direction of the box body, and the heat exchange plate is connected to the first face. A first sealing coating is arranged between the first face and the heat exchange plate and located on the side, facing the containing cavity, of the boss part. The sealing performance of the heat exchange plate and the circumferential frame is improved, the time for cleaning overflowing materials in the assembling process of the heat exchange plate and the circumferential frame is shortened, and the assembling efficiency is improved.

Description

Technical Field

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

[0002] This section merely provides background information related to the present application and is not necessarily prior art.

[0003] As the demand for clean energy increases, battery devices have been widely developed. Battery devices usually include a box and battery cells arranged in the box. The performance of the box is of great significance to the battery device. How to improve the performance of the box has always been a continuous concern in the research and development of battery devices. Utility Model Content

[0004] In view of the above problems, the present application provides a battery device and an electrical device to at least improve the sealing performance of the battery device box to improve the performance of the battery device.

[0005] The first aspect of the present application proposes a battery device, including a box body and a battery cell, wherein the box body is provided with a storage cavity, the box body includes a circumferential frame and a heat exchange plate, the circumferential frame is arranged around the circumference of the storage cavity, along the height direction of the box body, the storage cavity has a first end and a second end arranged oppositely, the heat exchange plate is arranged around the bottom of the storage cavity; the battery cell is arranged in the storage cavity. Wherein, the end face of the circumferential frame facing the first end is the first end face, along the circumference of the circumferential frame, at least part of the first end face includes a first surface and a boss portion, the boss portion is arranged around the side of the first surface away from the storage cavity, and along the height direction of the box body, the boss portion is arranged away from the second end compared with the first surface, the heat exchange plate is connected to the first surface, and is located on the side of the boss portion facing the storage cavity, and a first sealing coating is arranged between the first surface and the heat exchange plate.

[0006] In the technical solution of the embodiment of the present application, the first sealing coating between the heat exchange plate and the first surface can improve the sealing performance between the heat exchange plate and the circumferential side wall. Since the heat exchange plate is located on the side of the boss portion facing the accommodating cavity, if part of the sealing material overflows during the formation of the first sealing coating, the overflowed material will also fill between the circumferential edge of the heat exchange plate and the boss portion, and form a seal between the circumferential edge of the heat exchange plate and the boss portion, reducing the possibility of affecting the sealing performance between the heat exchange plate and the circumferential frame due to the overflow of the sealing material, improving the sealing performance of the heat exchange plate and the circumferential frame, and the overflowed material can be used as a sealing coating, reducing the time for cleaning the overflowed material during the assembly process of the heat exchange plate and the circumferential frame, improving the assembly efficiency, and reducing the production cost of the battery device.

[0007] In addition, the battery device according to the present application may also have the following additional technical features:

[0008] In some embodiments of the present application, a second sealing coating is provided between the circumferential edge of the heat exchange plate and the boss portion. By providing the second sealing coating, the sealing effect between the circumferential frame and the heat exchange plate can be improved. In addition, during the assembly process of the circumferential frame and the heat exchange plate, the circumferential frame is inverted, and since the circumferential edge of the heat exchange plate is located on the inner side of the third surface (i.e., the boss portion), during the assembly process, the gap between the circumferential edge of the heat exchange plate and the third surface is exposed upward, so that the filling condition of the second sealing coating can be observed from above the circumferential frame and the heat exchange plate, and the operator can observe the second sealing coating without bending or tilting the head, and the sealing condition of the first sealing coating can be inferred through the second sealing coating, so that the sealing effect of the sealing coating of the heat exchange plate can be confirmed more conveniently through appearance observation, thereby improving the overall assembly efficiency.

[0009] In some embodiments of the present application, the boss portion has a second surface and a third surface, and along the height direction, the second surface is spaced apart from the first surface, and the second surface is located on the side of the first surface away from the second end, and the third surface is connected between the first surface and the second surface; the third surface extends along the height direction, and / or the second surface extends along the extension direction of the plate surface of the heat exchange plate, and / or the first surface extends along the extension direction of the plate surface of the heat exchange plate.

[0010] In some embodiments of the present application, the first surface and the third surface are arranged perpendicular to each other, and the first surface and the second surface are arranged parallel to each other.

[0011] In some embodiments of the present application, along the height direction, the maximum dimension between the boss portion and the first surface is greater than or equal to the sum of the thickness of the heat exchange plate and the thickness of the first sealing coating. By setting the dimension of the boss portion to be greater than or equal to the sum of the thickness of the heat exchange plate and the thickness of the first sealing coating, the possibility of the heat exchange plate protruding relative to the boss portion along the height direction is reduced, and the boss portion can play a better protective role on the heat exchange plate, reducing the possibility of damage to the heat exchange plate.

[0012] In some embodiments of the present application, the housing further comprises a protective plate, the protective plate is connected to the circumferential frame, and the protective plate is located on the side of the boss portion facing the accommodating cavity, and along the height direction, the protective plate is arranged on the side of the heat exchange plate away from the accommodating cavity. The protective plate can protect the heat exchange plate. The protective plate is located on the side of the boss portion facing the accommodating cavity, so that the boss portion can locate the installation position of the protective plate, improve the convenience of installing the protective plate, and the boss portion can protect the circumferential edge of the protective plate, reducing the possibility of the circumferential edge of the protective plate being bumped.

[0013] In some embodiments of the present application, a connecting glue layer is provided between the protective plate and the heat exchange plate. The connecting glue layer can play a certain fixing role for the protective plate and the heat exchange plate, and the connecting glue layer can also play a certain sealing role between the protective plate and the heat exchange plate, reducing the influence of external dust or water vapor on the heat exchange plate; at the same time, the connecting glue layer can also play a buffering role, improving the buffering performance between the heat exchange plate and the protective plate. In addition, since the protective plate is located on the side of the boss portion facing the accommodating cavity, the connecting glue layer between the heat exchange plate and the protective plate is also located on the side of the boss portion facing the accommodating cavity. When there is glue overflow in the connecting glue layer, the overflowing glue can be filled between the circumferential edge of the protective plate and the boss portion (the third surface), playing a sealing connection role, and also reducing the steps of overflow glue processing, thereby improving assembly efficiency.

[0014] In some embodiments of the present application, along the height direction, part of the boss portion is protruding relative to the protective plate in a direction away from the second end, or the side of the protective plate away from the heat exchange plate is flush with the boss portion. Along the height direction, the circumferential edge of the protective plate is completely covered by the boss portion, and the boss portion can play a better protective role on the protective plate, reducing the possibility of damage to the protective plate.

[0015] In some embodiments of the present application, along the direction perpendicular to the height direction, the size of the first surface is greater than or equal to 1 / 2 of the thickness of the circumferential frame. In this embodiment, by setting the size of the first surface to be greater than or equal to 1 / 2 of the thickness of the circumferential frame, the connection convenience, connection strength and sealing performance of the heat exchange plate and the circumferential frame (i.e., the first surface) can be improved.

[0016] In some embodiments of the present application, along a direction perpendicular to the height direction, a dimension of the first surface is greater than or equal to 2 / 3 of a thickness dimension of the circumferential frame.

[0017] In some embodiments of the present application, the first end surface is the bottom end surface of the circumferential frame.

[0018] In some embodiments of the present application, the first sealing coating layer includes an adhesive layer; and / or the heat exchange plate is provided with a medium flow channel for the flow of heat exchange medium; and / or a thermal conductive adhesive layer is provided between the heat exchange plate and the battery cell.

[0019] In some embodiments of the present application, the first surface and the boss portion at the corresponding position are an integrally formed structure. By forming the first surface and the boss portion at the corresponding position as an integrally formed structure, the connection strength and sealing performance between the first surface and the boss portion are improved.

[0020] In some embodiments of the present application, the circumferential frame includes a plurality of beams connected end to end, at least a portion of the beams are rolled beams, and the end surface of the rolled beam facing the first end includes the first surface and the boss portion which are integrally rolled.

[0021] In some embodiments of the present application, the battery device further includes a fastener, and the heat exchange plate is fixedly connected to the first surface via the fastener.

[0022] A second aspect of the present application provides an electrical device, comprising a battery device provided in the present application or any embodiment of the present application.

[0023] The electrical equipment of this embodiment has the same beneficial effects as the battery device proposed in this application or any embodiment of this application.

[0024] 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

[0025] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0026] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0027] Figure 2 A schematic diagram of the structure of a battery device proposed in some embodiments of the present application;

[0028] Figure 3 A schematic diagram of a battery cell according to some embodiments of the present application;

[0029] Figure 4A schematic structural diagram of a portion of a circumferential frame and a heat exchange plate from one perspective proposed in some embodiments of the present application;

[0030] Figure 5 for Figure 4 A magnified view of part A;

[0031] Figure 6 A schematic diagram of the assembly process of a portion of a circumferential frame and a heat exchange plate proposed in some embodiments of the present application;

[0032] Figure 7 A schematic structural diagram of a portion of the circumferential frame and the heat exchange plate from another perspective proposed in some embodiments of the present application;

[0033] Figure 8 for Figure 7 A magnified view of part B;

[0034] Fig. 9 for Figure 8 Enlarged view of part C;

[0035] Fig.10 A partial cross-sectional schematic diagram of a portion of a circumferential frame and a heat exchange plate proposed in some embodiments of the present application.

[0036] The reference numerals in the specific implementation manner are as follows:

[0037] 1000, vehicle; 100, battery device; 200, controller; 300, motor;

[0038] 10. Box body; 101. Accommodating cavity; 110. Top cover; 120. Bottom plate; 121. Concave portion; 122. Protective plate; 130. Circumferential frame; 131. First end surface; 132. First surface; 1321. Mounting hole; 133. Boss portion; 134. Second surface; 135. Third surface; 136. First beam body; 137. Second beam body; 138. Roller beam; 139. Cavity; 140. Heat exchange plate; 141. Assembly hole; 150. First sealing coating; 160. Second sealing coating; 170. Connecting adhesive layer; 180. Fastener;

[0039] 20. Battery cell; 21. Shell; 211. Shell; 212. End cover; 213. Electrode terminal; 22. Electrode assembly; 221. Tab. DETAILED DESCRIPTION

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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).

[0046] 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.

[0047] 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.

[0048] Battery devices can store electrical energy and supply power to electrical equipment. With the development of new energy, the use of battery devices is becoming more and more extensive. Battery devices 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.

[0049] The battery device may include a box body and a battery cell, wherein the box body is formed with a receiving cavity, and the receiving cavity is used to receive the battery cell. The sealing property of the box body (i.e., the sealing property of the receiving cavity) is not only of great significance for the battery device to resist external moisture, dust, etc., but also has a great influence on the performance of the battery device. For example, if the receiving cavity is poorly sealed, it may cause leakage of reaction gas or coolant in the battery cell, thereby affecting the performance, reliability and service life of the battery device.

[0050] The battery device is usually provided with a heat exchange plate such as a water cooling plate at the bottom of the box body for adjusting the temperature of the battery cell. Taking the water cooling plate as an example, the water cooling plate can be provided with a cooling water flow channel, and the temperature of the battery cell can be adjusted by passing cooling water. Among them, the water cooling plate and other heat exchange plates are usually surrounded at the bottom of the accommodating cavity, and they can contact the battery cell through a thermal conductive adhesive layer or directly contact the battery cell to facilitate heat transfer between the battery cell and the water cooling plate. Since the heat exchange plate is a part of the accommodating cavity, the sealing between the heat exchange plate and the circumferential frame surrounding the accommodating cavity has a direct impact on the sealing of the accommodating cavity.

[0051] In some technologies, the bottom end surface of the circumferential frame and the upper edge surface of the heat exchange plate (such as a water-cooled plate) are overlapped and then sealed by applying glue at one time. During the assembly process, glue can be applied to the upper edge surface of the heat exchange plate (such as a water-cooled plate) and / or the bottom end surface of the circumferential frame first, and then the heat exchange plate (such as a water-cooled plate) is assembled to the bottom end surface of the circumferential frame. During the assembly process, the glue between the heat exchange plate and the bottom end surface of the circumferential frame will be squeezed, and the glue will overflow to the outside to form overflow glue. In the overflow glue area, due to the influence of gravity, the glue is easy to stagnate, resulting in poor edge sealing between the heat exchange plate and the circumferential frame, which in turn causes the box (accommodation cavity) to leak. In addition, the overflow glue needs to be cleaned, resulting in poor assembly convenience.

[0052] Based on the above problems, the present application proposes a battery device, wherein an upwardly concave step surface (first surface) is provided on the inner side of the bottom end surface of the box body (the side facing the accommodating cavity is the inner side), so that the outermost side of the bottom end surface of the circumferential frame (the side facing away from the accommodating cavity is the outer side) protrudes relative to the step surface (first surface) to form a boss portion (including a second surface and a third surface), and the circumferential edge of the heat exchange plate overlaps the step surface (i.e., the first surface), and a sealing coating is provided between the step surface, and the circumferential edge of the heat exchange plate is located on the inner side of the boss portion.

[0053] The flat butt interface between the heat exchange plate and the circumferential frame is changed to a stepped lap interface, and the sealing coating between the heat exchange plate and the step surface can seal the connection position between the heat exchange plate and the circumferential side wall; at the same time, the bottom end surface of the circumferential frame adds a boss portion as a flange on the outer side of the heat exchange plate, and the heat exchange plate is located on the inner side of the boss portion. The boss portion changes the direction of overflowing materials (such as overflowing glue). During the formation of the sealing coating between the heat exchange plate and the step surface, if part of the sealing material overflows, the overflowing material will also be filled between the circumferential edge of the heat exchange plate and the boss portion. In this way, the overflowing material can form a seal between the circumferential edge of the heat exchange plate and the boss portion, reducing the possibility of affecting the sealing performance between the heat exchange plate and the circumferential frame due to the overflow of the sealing material, thereby improving the sealing performance of the heat exchange plate and the circumferential frame. At the same time, the overflowing glue can be used as a sealing coating, which reduces the time for cleaning the overflowed sealing material during the assembly of the heat exchange plate and the circumferential frame, thereby improving the assembly efficiency and reducing the production cost of the battery device.

[0054] The battery device disclosed in the embodiment of the present application can be used in, but not limited to, electrical equipment such as vehicles, ships, or aircraft. The battery device disclosed in the present application can be used to form a power supply system for electrical equipment.

[0055] The embodiment of the present application provides an electric device using a battery device as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0056] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0057] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided in 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 device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 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 device 100 to power the motor 300, for example, for the working power demand of the vehicle 1000 during startup, navigation and driving.

[0058] In some embodiments of the present application, the battery device 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 .

[0059] like Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a battery device proposed in some embodiments of the present application. The battery device 100 mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells 20, and the multiple battery cells 20 are connected in series, in parallel, or in mixed connection through a busbar component.

[0060] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells 20 .

[0061] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells 20 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 20 by a cable tie.

[0062] In some embodiments, the battery device 100 may be a battery pack. The battery device 100 includes a case 10 and one or more battery cell assemblies. The battery cell assemblies are accommodated in the case 10 .

[0063] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box body 10 by fixing the battery module in the box body 10 .

[0064] As an example, the battery cell assembly may also be accommodated in the case 10 by directly fixing the plurality of battery cells 20 to the case 10 .

[0065] As an example, the box body includes a first box body and a second box body, and the first box body and the second box body are buckled together to form a closed space inside the box body 10 to accommodate the battery monomer assembly. The closed space here means covering or closing, which can be sealed or unsealed.

[0066] The box body 10 may include a top cover 110, a circumferential frame 130, and a bottom plate 120. The top cover 110 and the bottom plate 120 are respectively connected to the circumferential frame, so that a closed space is formed inside the box body 10 to accommodate the battery cell assembly.

[0067] In some embodiments, the box 10 can be used as a part of the chassis structure of the vehicle 1000. For example, part of the box 10 can become at least a part of the floor of the vehicle 1000, or part of the box 10 can become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0068] In the embodiment of the present application, the battery cell 20 may be a secondary battery. A secondary battery refers to a battery cell 20 that can be continuously used by activating active materials by charging after the battery cell 20 is discharged.

[0069] The battery cell 20 may be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, or the like.

[0070] like Figure 3 As shown, Figure 3This is a schematic diagram of a battery cell proposed in some embodiments of the present application. The battery cell 20 may include an electrode assembly 22 and a shell 21. The electrode assembly 22 is arranged in the shell 21, including a positive electrode, a negative electrode and a separator, and the separator is arranged between the negative electrode and the positive electrode; the electrode assembly 22 is provided with a pole ear 221, and the pole ear 221 can lead the current from the electrode assembly 22. The pole ear 221 includes a positive pole ear and a negative pole ear. At least one electrode terminal 213 is arranged on the shell 21, and the electrode terminal 213 is electrically connected to the pole ear 221. The electrode terminal 213 can be directly connected to the pole ear 221, and can also be indirectly connected to the pole ear 221 through a current collecting member. The shell 21 includes a shell 211 with an opening and an end cover 212 covering the opening. The electrode terminal 213 can be arranged on the end cover 212 or on the shell 211.

[0071] Figure 4 This is a structural schematic diagram of a partial circumferential frame and a heat exchange plate from one perspective proposed in some embodiments of the present application. Figure 5 for Figure 4 A magnified view of part A. Figure 6 This is a schematic diagram of the assembly process of a portion of the circumferential frame and the heat exchange plate proposed in some embodiments of the present application. Figure 7 This is a schematic structural diagram of a portion of the circumferential frame and the heat exchange plate from another perspective proposed in some embodiments of the present application, wherein: Figure 6 This is a diagram of the inverted assembly process of the structure. In actual use, it is usually Figure 7 Posture placement; Figure 8 for Figure 7 A magnified view of part B; Fig. 9 for Figure 8 The enlarged view of part C. Figure 2 As shown, combined with Figures 4 to 9 As shown, some embodiments of the present application provide a battery device 100, including a box body 10 and a battery cell 20, the box body 10 is provided with a receiving cavity 101, the box body 10 includes a circumferential frame 130 and a heat exchange plate 140, the circumferential frame 130 is arranged around the circumference of the receiving cavity 101, along the height direction of the box body 10, the receiving cavity 101 has a first end and a second end arranged oppositely, and the heat exchange plate 140 is arranged around the first end of the receiving cavity 101. The battery cell 20 is arranged in the receiving cavity 101. Among them, the end face of the circumferential frame 130 facing the first end is the first end face 131. Along the circumference of the circumferential frame 130, at least part of the first end face 131 includes a first surface 132 and a boss portion 133. The boss portion 133 is arranged on the side of the first surface 132 away from the accommodating cavity 101, and along the height direction Z of the box body 10, the boss portion 133 is arranged away from the second end compared to the first surface 132. The heat exchange plate 140 is connected to the first surface 132 and is located on the side of the boss portion 133 facing the accommodating cavity 101. A first sealing coating 150 is arranged between the first surface 132 and the heat exchange plate 140.

[0072] One or more battery cells 20 may be provided.

[0073] The first end may be the bottom end of the accommodating cavity 101, and the second end may be the top end of the accommodating cavity; the first end may also be the top end of the accommodating cavity 101, and the second end may be the bottom end of the accommodating cavity. This embodiment and the corresponding drawings are mainly described by taking the first end as the bottom end of the accommodating cavity 101, the first end surface 131 as the bottom end surface, and the battery cell 20 supported on the heat exchange plate 140 as an example.

[0074] The height direction of the box body 10 can be understood as the arrangement direction from the first end to the second end of the box body 10, that is, the direction from the top to the bottom of the box body 10, which can be roughly understood with reference to the axial direction of the accommodating cavity 101, which is also the direction from the top to the bottom of the circumferential frame 130 or the accommodating cavity 101.

[0075] The boss portion 133 is arranged around the side of the first surface 132 away from the accommodating cavity 101. It can be understood that the first surface 132 and the boss portion 133 are arranged in a direction pointing from the inner side of the accommodating cavity 101 to the outer side, and the boss portion 133 is arranged away from the accommodating cavity 101 compared to the first surface 132, that is, the boss portion 133 at the same position of the first surface 132 is close to the side of the accommodating cavity 101.

[0076] The inner side of the accommodating cavity 101 pointing to the outer side refers to the direction from the inner side of the accommodating cavity 101 to the outer side, which can be roughly understood with reference to the radial direction of the box body 10. At different beams, the inner side of the accommodating cavity 101 pointing to the outer side is the direction from the accommodating cavity 101 to the corresponding beam. For example, refer to Figures 4 to 6 As shown, the direction from the inside of the accommodating cavity 101 corresponding to the first beam 136 to the outside is the direction X1, and the direction from the inside of the accommodating cavity 101 corresponding to the second beam 137 to the outside is the direction X2. The direction from the inside of the accommodating cavity 101 to the outside can be roughly perpendicular to the height direction of the box body 10, and any direction from the inside of the accommodating cavity 101 to the outside can be in a plane perpendicular to the height direction of the box body 10.

[0077] Along the height direction Z of the box body 10, the boss portion 133 is arranged farther from the second end than the first surface 132, which can be understood as that along the height direction Z of the box body 10, the boss portion 133 is arranged farther from the top side of the box body 10 relative to the first surface 132. Specifically, the boss portion 133 can be arranged protrudingly relative to the first surface 132 in a direction away from the second end (away from the second end, which can be understood by referring to the direction away from the top end, i.e., toward the bottom end), or the first surface 132 can be arranged concavely relative to the boss portion 133 toward the second end (towards the second end, which can be understood by referring to the direction toward the top end in the drawings)), so that the boss portion 133 is arranged farther from the second end than the first surface 132.

[0078] The circumferential frame 130 refers to an annular frame that surrounds the accommodating cavity 101, forms the circumferential side wall of the accommodating cavity 101, and surrounds the battery cell 20 in the circumferential direction. The circumferential frame 130 may be a structure formed by splicing multiple beams end to end. For example, in a square-structured battery device 100, the box body 10 is roughly square-shaped, and the circumferential frame 130 may be a square ring structure formed by splicing four beams end to end.

[0079] The first end surface 131 of the circumferential frame 130 refers to the end surface of the circumferential frame 130 corresponding to the end (i.e., the first end) where the heat exchange plate 140 is located. Exemplarily, the heat exchange plate 140 may be arranged around the bottom of the accommodating cavity 101. In this case, the bottom end surface of the circumferential frame 130 corresponding to the heat exchange plate 140 is defined as the first end surface 131, and the first end surface 131 of the circumferential frame 130 is arranged toward the bottom side of the box body 10.

[0080] At least a portion of the first end surface 131 of the circumferential frame 130 along its own circumference can be understood as at least a portion of the first end surface 131 of the circumferential frame 130 along the circumference of the circumferential frame 130 .

[0081] Exemplarily, along the circumference of the circumferential frame 130, any position of the first end surface 131 of the circumferential frame 130 can be configured to include the first surface 132 and the boss portion 133. In this case, the first surface 132 is arranged in an annular shape along the circumference of the circumferential frame 130, and the boss portion 133 is arranged in an annular shape along the circumference of the circumferential frame 130. For example, in the square-structured battery device 100, the first end surfaces 131 of the four beams are all configured to include the first surface 132 and the boss portion 133.

[0082] Exemplarily, along the circumference of the circumferential frame 130, a portion of the first end surface 131 of the circumferential frame 130 may be configured to include a first surface 132 and a boss portion 133. For example, in a square-structured battery device 100, the first end surface 131 of one beam, two beams, or three beams may be configured to include a first surface 132 and a boss portion 133, respectively, and the first surface 132 and the boss portion 133 may extend from one end of the corresponding beam to the other end along the extension direction of the beam.

[0083] The first surface 132 and the boss portion 133 are both local areas at corresponding positions of the circumferential frame 130 , and the first surface 132 and the boss portion 133 may be an integral structure.

[0084] The heat exchange plate 140 is a plate body that can be installed with a heat exchange mechanism or has heat exchange performance. For example, a medium flow channel can be provided in the heat exchange plate 140 as a heat exchange mechanism, and the medium flow channel is used to flow through a heat exchange medium such as gas (such as air) or liquid (such as water). The heat exchange plate 140 exchanges heat with the battery cell 20 through the heat exchange medium in the medium flow channel to adjust the temperature of the battery cell 20. For another example, a pipe can be provided on the heat exchange plate 140, and the pipe can form a medium flow channel and serve as a heat exchange mechanism. The pipe is used to flow through a heat exchange medium such as gas (such as air) or liquid (such as water). The heat exchange plate 140 exchanges heat with the battery cell 20 through the heat exchange medium in the medium flow channel to adjust the temperature of the battery cell 20.

[0085] Exemplarily, the heat exchange plate 140 may be a water-cooled plate, which is a plate body for water-cooling the battery cells 20 , and a water cooling channel is disposed in the plate body or a water flow pipe is disposed on the plate body for water flow.

[0086] The heat exchange plate 140 is disposed at the first end of the accommodating cavity 101 and can be connected to the first end surface 131 of the circumferential frame 130 to enclose the accommodating cavity 101. The heat exchange plate 140 can be connected to the circumferential frame 130 by at least one of bonding, screwing, and riveting. The heat exchange plate 140 and the battery cell 20 can be in direct contact or connected by a thermally conductive adhesive layer to improve the heat exchange efficiency between the heat exchange plate 140 and the battery cell 20. The heat exchange plate 140 is disposed at the bottom of the accommodating cavity 101, and the heat exchange plate 140 can perform thermal management on the battery cell 20 from the bottom of the battery cell 20.

[0087] The heat exchange plate 140 may serve as the bottom plate of the box body 10 , and the box body 10 may also be provided with a protective plate 122 on the bottom side of the heat exchange plate 140 , and the protective plate 122 serves as the bottom plate 120 .

[0088] For example, in some embodiments, the box 10 may include a first box and a second box that are buckled together, the first box may be a top cover 110 or a bottom plate, and the second box may be disposed on the bottom side of the first box. The heat exchange plate 140 may be the bottom wall of the second box, which is connected to the circumferential frame 130 of the second box; the heat exchange plate 140 may also be disposed on the upper side of the bottom wall of the second box and connected to the bottom end of the circumferential frame 130 of the second box.

[0089] For example, in other embodiments, the housing 10 may include a top cover 110, a circumferential frame 130, and a bottom plate 120. The top cover 110 and the bottom plate 120 are respectively connected to the circumferential frame 130, and the heat exchange plate 140 may be disposed on the inner side of the bottom plate 120 (i.e., the side facing the accommodating cavity 101) and connected to the circumferential frame 130.

[0090] The first sealing coating 150 may be an adhesive layer with bonding properties, or other coatings that may have a sealing effect. In the process of assembling the circumferential frame 130 and the heat exchange plate 140, the circumferential frame 130 may be firstly assembled, and then glue or other coatings may be applied to the upper surface of the edge of the heat exchange plate 140 and / or the first end surface 131 (actually located on the top side in an inverted state) of the circumferential frame 130, and then the heat exchange plate 140 may be assembled to the first end surface 131 of the circumferential frame 130.

[0091] In the battery device 100 of this embodiment, at least part of the first end surface 131 of the circumferential frame 130 includes a first surface 132 and a boss portion 133. The heat exchange plate 140 is connected to the first surface 132 and is located on the side of the boss portion 133 facing the accommodating cavity 101. The installation position of the heat exchange plate 140 can be positioned through the limiting effect of the boss portion 133 and the first surface 132, thereby improving the convenience of installing the heat exchange plate. The first sealing coating 150 between the heat exchange plate 140 and the first surface 132 can seal the connection position between the heat exchange plate 140 and the circumferential frame 130.

[0092] The heat exchange plate 140 and the circumferential frame 130 form a stepped overlap interface. The first sealing coating 150 between the heat exchange plate 140 and the first surface 132 can seal the connection position between the heat exchange plate 140 and the circumferential side wall. At the same time, the first end surface 131 of the circumferential frame 130 adds a boss portion 133 as a flange on the outer side of the heat exchange plate 140, so that the heat exchange plate 140 is located on the inner side of the boss portion 133. During the formation of the sealing coating between the heat exchange plate 140 and the first surface 132, excess sealing material overflows and fills between the circumferential edge of the heat exchange plate 140 and the boss portion 133. In this way, the overflowed material can A seal is formed between the circumferential edge of the heat exchange plate 140 and the boss portion 133, so that the overflowed material becomes an auxiliary advantage of the sealing of the box body 10, reducing the possibility of affecting the sealing performance between the heat exchange plate 140 and the circumferential frame 130 due to the overflow of sealing material, thereby improving the sealing performance of the heat exchange plate 140 and the circumferential frame 130. At the same time, the overflowed glue can be used as a sealing coating, and the boss portion 133 can shield the overflowed glue, thereby reducing the time for cleaning the overflowed sealing material during the assembly process of the heat exchange plate 140 and the circumferential frame 130, thereby improving the assembly efficiency and the appearance quality of the box body 10, and reducing the production cost of the battery device 100.

[0093] According to some embodiments of the present application, optionally, a second sealing coating 160 is provided between the circumferential edge of the heat exchange plate 140 and the boss portion 133 .

[0094] For example, Figures 4 to 9As shown, the first end surface 131 is the bottom end surface of the circumferential frame 130, and the surface of the boss portion 133 of the first end surface 131 includes a second surface 134 and a third surface 135, wherein the second surface 134 is the bottom surface of the boss portion 133, and the second surface 134 is arranged toward the bottom end of the box body 10, and along the height direction Z of the box body 10, the second surface 134 is located on the side of the first surface 132 away from the top end of the box body 10, and the third surface 135 is the surface of the boss portion 133 connected between the first surface 132 and the second surface 134. The heat exchange plate 140 is connected to the first surface 132, and along the direction from the inside to the outside of the accommodating cavity 101, the circumference of the heat exchange plate 140 is conveniently located on the side of the third surface 135 facing the accommodating cavity 101 (ie, toward the accommodating cavity 101), that is, located on the inner side of the third surface 135, and a second sealing coating 160 may be arranged between the third surface 135 and the circumferential edge of the heat exchange plate 140.

[0095] The second sealing coating layer 160 may be an adhesive layer.

[0096] In some cases, during the process of assembling the heat exchange plate 140 and the circumferential frame 130, the coating between the heat exchange plate 140 and the first end surface 131 of the circumferential frame 130 will be squeezed (the coating has not yet solidified), and part of the coating will overflow to the circumferential edge of the heat exchange plate 140 and the third surface 135 (the boss portion 133) to form the second sealing coating 160. In this way, after the heat exchange plate 140 and the circumferential frame 130 are coated with a coating such as glue once, the overflowed material (such as glue, etc.) can be squeezed through the first surface 132 of the circumferential frame 130 and the profile of the boss portion 133 to fill the structural edge of the heat exchange plate 140, achieving the effect of one-time coating and secondary protection and sealing, which greatly improves the sealing effect of the sealing coating of the heat exchange plate 140, and there is no need to clean up the residual overflowed material.

[0097] In other cases, when the heat exchange plate 140 and the circumferential frame 130 are not tightly sealed through the first sealing coating 150, or when the sealing of the heat exchange plate 140 and the circumferential frame 130 needs to be strengthened, the coating can be injected or dotted between the circumferential edge of the heat exchange plate 140 and the third surface 135 (the boss portion 133) to form the second sealing coating 160. Thus, the housing 10 can form the second sealing coating 160 between the heat exchange plate 140 and the circumferential frame 130 through the secondary sealing interface (i.e., the interface between the heat exchange plate 140 and the third surface 135), and the sealing area between the heat exchange plate 140 and the circumferential frame 130 can be repaired, which greatly improves the repair efficiency of the heat exchange plate 140 due to poor sealant coating.

[0098] By providing the second sealing coating 160 , the sealing effect between the circumferential frame 130 and the heat exchange plate 140 can be improved. In addition, during the assembly process of the circumferential frame 130 and the heat exchange plate 140, since the circumferential edge of the heat exchange plate 140 is located on the inner side of the third surface 135 (i.e., the boss portion 133), during the assembly process, the gap between the circumferential edge of the heat exchange plate 140 and the third surface 135 is exposed upward (it should be noted that when the first end surface 131 is the bottom end surface, the circumferential frame 130 can be placed upside down during the processing process, or the gap between the circumferential edge of the heat exchange plate 140 and the third surface 135 can be exposed upward), so that the filling condition of the second sealing coating 160 can be observed from above the circumferential frame 130 and the heat exchange plate 140, and the operator can observe the second sealing coating 160 without bending or tilting the head, and the sealing condition of the first sealing coating 150 can be inferred through the second sealing coating 160, so that the sealing effect of the sealing coating of the heat exchange plate 140 can be confirmed more conveniently through appearance observation, thereby improving the overall assembly efficiency.

[0099] like Figures 4 to 9 As shown, according to some embodiments of the present application, optionally, the boss portion 133 has a second surface 134 and a third surface 135, and along the height direction Z of the box body 10, the second surface 134 is spaced apart from the first surface 132, and the second surface 134 is located on the side of the first surface 132 away from the top of the box body 10, and the third surface 135 is connected between the first surface 132 and the second surface 134. The third surface 135 extends along the height direction Z of the box body 10, and / or the second surface 134 extends along the extension direction of the plate surface of the heat exchange plate 140, and / or the first surface 132 extends along the extension direction of the plate surface of the heat exchange plate 140.

[0100] Optionally, the first surface 132 may extend along the extension direction of the plate surface of the heat exchange plate 140, that is, the extension direction of the first surface 132 may be substantially parallel to the overall plate surface of the heat exchange plate 140. The first surface 132 may be a plane. By arranging the first surface 132 to extend along the extension direction of the plate surface of the heat exchange plate 140, the first surface 132 may be substantially parallel to the circumferential edge of the heat exchange plate 140, thereby improving the connection stability between the first surface 132 and the heat exchange plate 140 and the uniformity of the first sealing coating 150, thereby improving the sealing performance between the heat exchange plate 140 and the circumferential frame 130.

[0101] Exemplarily, the first end surface 131 is the bottom end surface of the circumferential frame 130 , and the second surface 134 is disposed toward the bottom side of the box body 10 .

[0102] Optionally, the second surface 134 may extend along the extension direction of the plate surface of the heat exchange plate 140, that is, the second surface 134 may be arranged roughly parallel to the overall plate surface of the heat exchange plate 140. The second surface 134 may be a plane. When the battery device 100 is placed on the ground or on a support surface of an electrical device, the second surface 134 of the circumferential frame 130 may serve as a position where the box body 10 contacts the support surface. By setting the second surface 134 to extend along the extension direction of the plate surface of the heat exchange plate 140, the contact area between the box body 10 and the support surface can be increased, the support stability and aesthetic appearance of the box body 10 can be improved, and the processing of the boss portion 133 of the circumferential side wall is more convenient.

[0103] Optionally, the third surface 135 extends along the height direction Z of the housing 10, that is, the third surface 135 can be arranged substantially parallel to the height direction Z of the housing 10. The third surface 135 can be a plane, which can be arranged obliquely along the height direction Z of the housing 10, or can be arranged straight along the height direction Z of the housing 10. By arranging the third surface 135 to extend along the height direction Z of the housing 10, the possibility of partial obstruction of the gap between the circumferential frame 130 and the heat exchange plate 140 is reduced, which facilitates the observation of the filling condition of the second sealing coating 160 from above, and improves the observation convenience and the overall assembly efficiency.

[0104] According to some embodiments of the present application, optionally, the first surface 132 and the third surface 135 are arranged perpendicular to each other, and the first surface 132 and the second surface 134 are arranged parallel to each other.

[0105] like Figures 4 to 9 As shown, the first surface 132, the third surface 135 and the first surface 132 form an L-shaped structure.

[0106] The structures of the first surface 132, the third surface 135 and the second surface 134 of the present embodiment are easy to form and process, and the first surface 132 and the third surface 135 are arranged at right angles, which is beneficial to the flow filling of the first sealing coating 150 and the second sealing coating 160, thereby improving the sealing performance of the heat exchange plate 140 and the circumferential frame 130.

[0107] According to some embodiments of the present application, optionally, Figures 4 to 9 Along the height direction Z of the housing 10 , the maximum dimension h1 between the boss portion 133 and the first surface 132 is greater than or equal to the sum of the thickness h2 of the heat exchange plate 140 and the thickness h3 of the first sealing coating 150 .

[0108] The maximum dimension h1 between the boss portion 133 and the first surface 132 can be understood as the maximum dimension of the boss portion 133 protruding relative to the first surface 132 connected and adjacent to it, which can be understood with reference to the maximum distance between the first surface 132 and the second surface 134 along the height direction Z.

[0109] Exemplarily, the first surface 132 is parallel to the second surface 134 , and the maximum dimension h1 between the boss portion 133 and the first surface 132 is the distance along the height direction Z between the first surface 132 and the second surface 134 .

[0110] The maximum dimension h1 between the boss portion 133 and the first surface 132 is greater than or equal to the sum of the thickness h2 of the heat exchange plate 140 and the thickness h3 of the first sealing coating 150, which means that the maximum dimension h1 between the boss portion 133 and the first surface 132 is not less than the sum of the thickness h2 of the heat exchange plate 140 at the position adjacent to the boss portion 133 and the thickness h3 of the first sealing coating 150. In other words, the boss portion 133 is flush or protruding relative to the heat exchange plate 140 and its adjacent position.

[0111] It should be noted that the stacking thickness of the heat exchange plate 140 and the first sealing coating 150 may be different at different positions. In this case, for ease of processing, the sum of the thickness h2 of the heat exchange plate 140 and the thickness h3 of the first sealing coating 150 can take the maximum value.

[0112] Exemplarily, the first end surface 131 is the bottom end surface of the circumferential frame 130 , and the bottom surface of the heat exchange plate 140 is located above the second surface 134 or is flush with the second surface 134 .

[0113] By setting the size h1 of the boss portion 133 to be greater than or equal to the sum of the thickness h2 of the heat exchange plate 140 and the thickness h3 of the first sealing coating 150, the possibility of the heat exchange plate 140 protruding relative to the boss portion 133 along the height direction Z of the housing 10 is reduced. The boss portion 133 can provide better protection for the heat exchange plate 140 and reduce the possibility of damage to the heat exchange plate 140.

[0114] According to some embodiments of the present application, optionally, Figures 4 to 9 As shown, the box body 10 also includes a protective plate 122, which is connected to the circumferential frame 130, and is located on the side of the boss portion 133 facing the accommodating cavity 101. Along the height direction Z of the box body 10, the protective plate 122 is arranged on the side of the heat exchange plate 140 away from the accommodating cavity 101.

[0115] Exemplarily, the first end surface 131 can be the bottom end surface of the circumferential frame 130, and the protective plate 122 can be the bottom plate 120 of the box body 10, which is arranged on the bottom side of the heat exchange plate 140 and points along the inner side of the accommodating cavity 101 to the outside. The protective plate 122 is located on the side of the boss portion 133 facing the accommodating cavity 101.

[0116] The protective plate 122 can be directly connected to the circumferential frame 130, for example, the protective plate 122 is fixedly connected to the third surface 135; the protective plate 122 can also be connected to the heat exchange plate 140 through the fastener 180, for example, the fastener 180 passes through the protective plate 122 (such as bolts, screws or rivets, etc.), the heat exchange plate 140 and is fixedly connected to the first surface 132, so that the protective plate 122 is fixedly connected to the circumferential side wall.

[0117] The protective plate 122 can protect the heat exchange plate 140. The protective plate 122 is located on the side of the boss portion 133 facing the accommodating cavity 101, so that the boss portion 133 can locate the installation position of the protective plate 122, improve the installation convenience of the protective plate 122, and the boss portion 133 can protect the circumferential edge of the protective plate 122, reducing the possibility of the circumferential edge of the protective plate 122 being bumped.

[0118] According to some embodiments of the present application, optionally, a connecting adhesive layer 170 is provided between the protective plate 122 and the heat exchange plate 140 .

[0119] The connecting adhesive layer 170 may be applied to a local position of the protection plate 122 facing the heat exchange plate 140 . For example, the connecting adhesive layer 170 may be applied to the top surface of the heat exchange plate 140 corresponding to the first surface 132 .

[0120] The connection glue layer 170 may be a layer formed by coating glue.

[0121] The connecting glue layer 170 can play a certain role in fixing the protective plate 122 and the heat exchange plate 140, and the connecting glue layer 170 can also play a certain role in sealing between the protective plate 122 and the heat exchange plate 140, reducing the influence of external dust or water vapor on the heat exchange plate 140; at the same time, the connecting glue layer 170 can also play a buffering role, improving the buffering performance between the heat exchange plate 140 and the protective plate 122. In addition, since the protective plate 122 is located on the side of the boss portion 133 facing the accommodating cavity 101, the connecting glue layer 170 between the heat exchange plate 140 and the protective plate 122 is also located on the side of the boss portion 133 facing the accommodating cavity 101. When there is glue overflow in the connecting glue layer 170, the overflowing glue can be filled between the circumferential edge of the protective plate 122 and the boss portion 133 (the third surface 135), playing a role in sealing connection, and also reducing the steps of overflow glue processing, thereby improving assembly efficiency.

[0122] According to some embodiments of the present application, optionally, along the height direction Z of the box body 10, part of the boss portion 133 protrudes relative to the protective plate 122 in a direction away from the second end of the box body 10, or the side of the protective plate 122 away from the heat exchange plate 140 is flush with the boss portion 133.

[0123] Exemplarily, the first end surface 131 is the bottom end surface of the circumferential frame 130 , and the second surface 134 of the boss portion 133 is located at the bottom side of the protective plate 122 .

[0124] For example, Figures 4 to 9 As shown, the first end surface 131 is the bottom end surface of the circumferential frame 130 , and the second surface 134 of the boss portion 133 is substantially flush with the bottom surface of the protective plate 122 .

[0125] Exemplarily, the protective plate 122 is a base plate 120, which may be provided with a downwardly recessed portion 121, and the recessed portion 121 may be in contact with the supporting table surface. By providing the recessed portion 121, a gap may be created between the protective plate 122 and the supporting table surface, thereby improving the heat dissipation of the protective plate 122.

[0126] It is understandable that, when the protective plate 122 is a concave-convex structure, the side of the protective plate 122 away from the heat exchange plate 140 refers to the bottom surface of the protective plate 122 near the boss portion 133. That is, the boss portion 133 can prevent the circumferential edge of the protective plate 122 from protruding.

[0127] Along the height direction Z of the box body 10, the circumferential edge of the protective plate 122 is completely covered by the boss portion 133, and the boss portion 133 can play a good protective role on the protective plate 122, reducing the possibility of damage to the protective plate 122. At the same time, when there is glue overflow in the connecting glue layer 170 between the heat exchange plate 140 and the protective plate 122, the overflowed glue can be filled between the circumferential edge of the protective plate 122 and the boss portion 133 (third surface 135), which can play a sealing connection role, and also reduce the steps of overflow glue processing, and improve assembly efficiency.

[0128] According to some embodiments of the present application, optionally, along a direction perpendicular to the height direction Z of the box body 10 , a dimension W1 of the first surface 132 is greater than or equal to 1 / 2 of a thickness dimension W2 of the circumferential frame 130 .

[0129] The direction perpendicular to the height direction Z of the box body 10 can be understood as a direction pointing from the inner side of the accommodating cavity 101 to the outer side.

[0130] The thickness dimension W2 of the circumferential frame 130 refers to the dimension of the area where the circumferential frame 130 is provided with the first surface 132, from the side facing the accommodating cavity 101 to the side away from the accommodating cavity 101. For example, in a square-structured battery device 100, the thickness dimension W2 of the circumferential frame 130 refers to the dimension of the beam body where the first surface 132 is located along the accommodating cavity 101 pointing to the beam body.

[0131] The comparison between the dimension W1 of the first surface 132 and the thickness dimension W2 of the circumferential frame 130 focuses on the comparison between the overall thickness of the circumferential frame 130 at the location where the first surface 132 is provided and the dimension W1 of the first surface 132. That is, the dimension W1 of the first surface 132 is greater than or equal to 1 / 2 of the thickness dimension W2 of the circumferential frame 130, which means that the dimension W1 of the first surface 132 is not less than 1 / 2 of the overall thickness of the circumferential frame 130 at the location where the first surface 132 is provided.

[0132] It should be noted that, in some cases, if the size W1 of the first surface 132 or the thickness W2 of the circumferential frame 130 is set differently at different positions, in order to facilitate processing design, the minimum size of the first surface 132 can also be used as the size W1 of the first surface 132, and the maximum value of the thickness of the circumferential frame 130 can be used as the thickness W2 of the circumferential frame 130. It should be noted that, since the boss portion 133 is also provided on the outer side of the first surface 132, the maximum value of the size W1 of the first surface 132 should be smaller than the thickness W2 of the circumferential frame 130 at the corresponding position.

[0133] Optionally, along the direction from the inside to the outside of the accommodating cavity 101 , the sum of the thickness dimension W3 of the boss portion 133 and the dimension W1 of the first surface 132 may be equal to the thickness dimension W2 of the circumferential frame 130 .

[0134] Exemplarily, the size W1 of the first surface 132 may be 1 / 2, 2 / 3, 4 / 5, 5 / 6, etc. of the thickness size W2 of the circumferential frame 130 .

[0135] The first surface 132 is a sealing surface between the circumferential frame 130 and the heat exchange plate 140, and is also a surface that supports and connects the heat exchange plate 140. The larger the size of the first surface 132, the more conducive it is to improve the connection convenience, connection strength and sealing performance of the heat exchange plate 140 and the circumferential frame 130 (i.e., the first surface 132). In this embodiment, by setting the size W1 of the first surface 132 to be greater than or equal to 1 / 2 of the thickness size W2 of the circumferential frame 130, the connection convenience, connection strength and sealing performance of the heat exchange plate 140 and the circumferential frame 130 (i.e., the first surface 132) can be improved.

[0136] According to some embodiments of the present application, optionally, along the direction from the inner side of the accommodating cavity 101 to the outer side, the size of the first surface 132 is greater than or equal to 2 / 3 of the thickness of the circumferential frame 130 .

[0137] In this embodiment, by setting the size W1 of the first surface 132 to be greater than or equal to 2 / 3 of the thickness size W2 of the circumferential frame 130 , the connection convenience, connection strength and sealing performance of the heat exchange plate 140 and the circumferential frame 130 (ie, the first surface 132 ) can be better improved.

[0138] According to some embodiments of the present application, optionally, the first end surface 131 is a bottom end surface of the circumferential frame 130 .

[0139] Since the heat exchange plate 140 is arranged corresponding to the first end surface 131, the first end surface 131 is arranged as the bottom end surface, and the heat exchange plate 140 is also arranged at the bottom of the box body 10, the processing and assembly of the battery device 100 is convenient and the heat exchange efficiency can be improved.

[0140] According to some embodiments of the present application, optionally, the first sealing coating 150 includes an adhesive layer; and / or the heat exchange plate 140 is provided with a medium flow channel for the flow of heat exchange medium; and / or a thermal conductive adhesive layer is provided between the heat exchange plate and the battery cell.

[0141] The adhesive layer is a coating formed by adhesive. By setting the first sealing coating 150 as an adhesive layer, coating is convenient, and while having a sealing effect, it can also play a certain role in fixing and connecting the heat exchange plate 140 and the circumferential frame 130 (first surface 132).

[0142] The heat exchange medium may be a fluid such as liquid or gas, and the medium flow channel may be formed inside the heat exchange plate 140 or may be disposed on the surface of the heat exchange plate 140 .

[0143] For example, the heat exchange plate 140 can be configured as a water-cooled plate, the heat exchange medium of which is water, and the medium flow channel is used for water flow. The water-cooled plate has a simple structure and low cost.

[0144] Exemplarily, a heat conductive adhesive layer is provided between the heat exchange plate and the battery cell. The heat conductive adhesive layer has good heat dissipation performance and can improve the heat exchange capacity between the heat exchange plate and the battery cell. The material of the heat conductive adhesive layer can be an adhesive layer with insulating properties such as epoxy resin heat conductive adhesive, silicone heat conductive adhesive or polyurethane heat conductive adhesive.

[0145] According to some embodiments of the present application, optionally, the first surface 132 and the boss portion 133 at the corresponding position are an integrally formed structure.

[0146] That is to say, along the circumference of the circumferential frame 130 , the first surface 132 and the boss portion 133 located in the same area of ​​the circumferential frame 130 are an integrally formed structure.

[0147] Exemplarily, each beam body of the circumferential frame 130 may be an integrally formed structure, each beam body may be welded to each other, and the first surface 132 and the boss portion 133 on each beam body are an integrally formed structure with the corresponding beam body.

[0148] The one-piece molding may specifically be injection molding, roll molding, or the like.

[0149] By forming the first surface 132 and the boss portion 133 at the corresponding position into an integrally formed structure, the connection strength and sealing performance between the first surface 132 and the boss portion 133 are improved.

[0150] According to some embodiments of the present application, optionally, the circumferential frame 130 includes a plurality of beams connected end to end, at least a portion of the beams are rolled beams 138, and the end surface of the rolled beam 138 facing the first end includes a first surface 132 and a boss portion 133 that are integrally rolled.

[0151] In the square-structured battery device 100, one, two, or three of the four beams may be configured as roll-pressed beams 138, or all four beams may be configured as roll-pressed beams 138. The beams may be connected to each other by welding. A cavity 139 may be provided inside each beam to reduce the weight of the battery device 100.

[0152] The rolled beam 138 is a component of an integrally formed structure manufactured by a roll-forming process, and the first end surface 131 includes an end surface of the rolled beam 138 facing the first end. The first surface 132 and the boss portion 133 of the end surface of the rolled beam 138 facing the first end can be integrally roll-formed with the main body of the rolled beam 138, that is, the rolled beam 138 is an integrally formed structure as a whole.

[0153] Optionally, the rolled beam 138 may be made of metal, such as aluminum. The metal material has good ductility, which can improve the convenience of roll-forming the rolled beam 138 and reduce the impact of the roll-forming of the rolled beam 138 on the structural strength.

[0154] The circumferential frame 130 is at least partially configured as a roller beam 138 , and the roller beam 138 is integrally provided with a first surface 132 and a boss portion 133 , which is easy to process and has good strength.

[0155] Fig.10 This is a partial cross-sectional schematic diagram of a portion of the circumferential frame and the heat exchange plate proposed in some embodiments of the present application. According to some embodiments of the present application, optionally, as Fig.10 As shown, the battery device 100 further includes a fastener 180 , and the heat exchange plate 140 is fixedly connected to the first surface 132 via the fastener 180 .

[0156] The fastener 180 may be a bolt, a screw, a rivet, or the like.

[0157] Exemplarily, the circumferential frame 130 may be provided with a mounting hole 1321 corresponding to the first surface 132 , the heat exchange plate 140 may be provided with an assembly hole 141 , and the fastener 180 may pass through the mounting hole 1321 and the assembly hole 141 to fasten the heat exchange plate 140 to the first surface 132 .

[0158] The fasteners 180 are provided to facilitate assembly of the heat exchange plate 140 and the circumferential frame 130 .

[0159] like Figure 2 , and combined with Figures 4 to 10As shown, this embodiment provides a battery device 100, including a box body 10 and a battery cell 20. The box body 10 is a roughly square structure, and includes a protective plate 122, a heat exchange plate 140, a circumferential frame 130 and a top cover 110. The top cover 110 is arranged at the top of the circumferential frame 130, and the heat exchange plate 140 is arranged at the bottom of the circumferential frame 130. The top cover 110, the heat exchange plate 140 and the circumferential frame 130 are arranged to form a receiving cavity 101. The protective plate 122 serves as the bottom plate 120 of the box body 10, is arranged on the bottom side of the heat exchange plate 140, and is connected to the circumferential frame 130. Among them, the circumferential frame 130 is arranged around the circumference of the receiving cavity 101, and the heat exchange plate 140 is arranged at the bottom of the receiving cavity 101; the battery cell 20 is arranged in the receiving cavity 101. The circumferential frame 130 includes four beam bodies, each of which is provided with a rolled beam 138. The four rolled beams 138 are welded in sequence from head to tail, and the bottom end surfaces of the four beam bodies are respectively roll-formed with a first surface 132 and a boss portion 133, wherein the first surface 132 of each beam body is located on the side of the boss portion 133 close to the accommodating cavity 101, and along the height direction Z of the box body 10, the boss portion 133 is protruded toward the bottom end of the box body 10 relative to the first surface 132, the four sides of the heat exchange plate 140 are respectively connected to the first surfaces 132 of the four beam bodies, and the heat exchange plate 140 is located on the side of the boss portion 133 facing the accommodating cavity 101, and a first sealing coating 150 is provided between the first surface 132 and the heat exchange plate 140. The boss portion 133 includes a second surface 134 and a third surface 135, the second surface 134 is arranged toward the bottom side of the box body 10 and along the height direction Z of the box body 10, the second surface 134 is located on the side of the first surface 132 away from the top of the box body 10, and the third surface 135 is connected between the first surface 132 and the second surface 134, wherein the third surface 135 extends along the height direction Z of the box body 10, the second surface 134 extends along the extension direction of the plate surface of the heat exchange plate 140, the first surface 132 extends along the extension direction of the plate surface of the heat exchange plate 140, the first surface 132 extends along the extension direction of the plate surface of the heat exchange plate 140, the first surface 132 and the third surface 135 are arranged perpendicular to each other, the first surface 132 and the second surface 134 are arranged parallel, and a second sealing coating 160 is arranged between the circumferential edge of the heat exchange plate 140 and the boss portion 133. The protective plate 122 is located on the side of the boss portion 133 facing the accommodating cavity 101, and a connecting adhesive layer 170 is arranged between the protective plate 122 and the heat exchange plate 140. Along the height direction Z of the box body 10, the side of the protective plate 122 facing away from the heat exchange plate 140 is flush with the boss portion 133. Along the direction from the inner side of the accommodating cavity 101 to the outer side, the dimension W1 of the first surface 132 is equal to 2 / 3 of the thickness dimension W2 of the circumferential frame 130, and the first sealing coating 150 and the second sealing coating 160 both include an adhesive layer; the heat exchange plate 140 is configured as a water-cooled plate.The heat exchange plate 140 and the protective plate 122 are fixed to the first surface 132 by fasteners 180, wherein the first surface 132 is provided with a mounting hole 1321, the heat exchange plate 140 and the protective plate 122 are aligned and respectively provided with assembly holes 141, the assembly holes 141 and the mounting holes 1321 are aligned, and the fasteners 180 are passed through the assembly holes 141 and the mounting holes 1321 to press and fix the heat exchange plate 140 and the protective plate 122 to the first surface 132.

[0160] The embodiment of the present application further provides an electrical device, including the battery device 100 proposed in the present application or any embodiment of the present application.

[0161] The battery device 100 is used to store or provide electrical energy.

[0162] The power-consuming device may be any of the above-mentioned devices or systems powered by the battery device 100 .

[0163] The electric device of this embodiment has the same beneficial effects as the battery device 100 proposed in this application or any embodiment of this application.

[0164] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0165] The above description of various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced to each other, and for the sake of brevity, they will not be repeated herein.

[0166] 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 device, characterized in that: include: A box body is provided with a receiving cavity, the box body comprises a circumferential frame and a heat exchange plate, the circumferential frame is arranged around the circumference of the receiving cavity, along the height direction of the box body, the receiving cavity has a first end and a second end arranged oppositely, and the heat exchange plate is arranged around the first end of the receiving cavity; A battery cell, disposed in the accommodation cavity; Among them, the end face of the circumferential frame facing the first end is the first end face, and along the circumference of the circumferential frame, at least part of the first end face includes a first surface and a boss portion, and the boss portion is arranged on a side of the first surface away from the accommodating cavity, and along the height direction of the box body, the boss portion is arranged farther away from the second end than the first surface, the heat exchange plate is connected to the first surface and is located on the side of the boss portion facing the accommodating cavity, and a first sealing coating is arranged between the first surface and the heat exchange plate.

2. The battery device according to claim 1, characterized in that: A second sealing coating is provided between the circumferential edge of the heat exchange plate and the boss portion.

3. The battery device according to claim 1, characterized in that: The boss portion has a second surface and a third surface. Along the height direction, the second surface is spaced apart from the first surface, and the second surface is located on a side of the first surface away from the second end. The third surface is connected between the first surface and the second surface. The third surface extends along the height direction, and / or the second surface extends along the extension direction of the plate surface of the heat exchange plate, and / or the first surface extends along the extension direction of the plate surface of the heat exchange plate.

4. The battery device according to claim 3, characterized in that: The first surface and the third surface are arranged perpendicular to each other, and the first surface and the second surface are arranged parallel to each other.

5. The battery device according to claim 1, characterized in that: Along the height direction, the maximum dimension between the boss portion and the first surface is greater than or equal to the sum of the thickness of the heat exchange plate and the thickness of the first sealing coating layer.

6. The battery device according to claim 1, characterized in that: The box body also includes a protective plate, which is connected to the circumferential frame and is located on a side of the boss portion facing the accommodating cavity. Along the height direction, the protective plate is arranged on a side of the heat exchange plate away from the accommodating cavity.

7. The battery device according to claim 6, characterized in that: A connecting adhesive layer is provided between the protective plate and the heat exchange plate.

8. The battery device according to claim 6, characterized in that: Along the height direction, part of the boss portion is protruding relative to the protection plate in a direction away from the second end, or the side of the protection plate away from the heat exchange plate is flush with the boss portion.

9. The battery device according to any one of claims 1 to 8, characterized in that: Along a direction perpendicular to the height direction, a dimension of the first surface is greater than or equal to 1 / 2 of a thickness dimension of the circumferential frame.

10. The battery device according to claim 9, characterized in that: Along a direction perpendicular to the height direction, a dimension of the first surface is greater than or equal to 2 / 3 of a thickness dimension of the circumferential frame.

11. The battery device according to any one of claims 1 to 8, characterized in that: The first end surface is a bottom end surface of the circumferential frame.

12. The battery device according to any one of claims 1 to 8, characterized in that: The first sealing coating comprises an adhesive layer; And / or, the heat exchange plate is provided with a medium flow channel for the heat exchange medium to flow; And / or, a heat-conducting adhesive layer is provided between the heat exchange plate and the battery cell.

13. The battery device according to any one of claims 1 to 8, characterized in that: The first surface and the boss portion at the corresponding position are an integrally formed structure.

14. The battery device according to claim 13, characterized in that: The circumferential frame includes a plurality of beams connected end to end, at least a portion of the beams are rolled beams, and the end surface of the rolled beam facing the first end includes the first surface and the boss portion which are integrally formed by rolling.

15. The battery device according to any one of claims 1 to 8, characterized in that: The battery device further includes a fastener, and the heat exchange plate is fixedly connected to the first surface via the fastener.

16. An electrical equipment, characterized in that: A battery device comprising any one of claims 1-15.

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