Box body assembly, battery pack and electric equipment

Abstract

The invention discloses a box body assembly, a battery pack and electric equipment, and belongs to the technical field of batteries, the box body assembly comprises a shell, a supporting plate and a heat preservation structure, and the shell is provided with a mounting space; the supporting plate is connected with the shell and located in the mounting space, and the supporting plate is used for mounting a battery module; a heat preservation chamber is formed by one side, deviating from the battery module, of the supporting plate and the shell; the heat preservation structure is installed in the heat preservation cavity. The heat preservation structure is arranged between the supporting plate and the shell, so that the heat preservation capability of the box body assembly is enhanced, and the temperature of the battery module is prevented from being reduced too fast.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a housing assembly, a battery pack, and an electrical device. Background Technology

[0002] In related technologies, the battery pack's casing has insufficient heat insulation and dissipates heat too quickly, which leads to the battery module cooling down too fast and affects the battery pack's performance. Summary of the Invention

[0003] This application provides a housing assembly, a battery pack, and an electrical device to at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a housing assembly is provided, comprising: a housing having an installation space; A support plate is connected to the housing and located within the installation space. The support plate is used to install the battery module. The side of the support plate opposite to the battery module forms a heat-insulating chamber with the housing. The thermal insulation structure is installed in the thermal insulation chamber.

[0005] In this embodiment, a battery module is mounted on one side of the support plate, and a thermal insulation chamber is formed between the side of the support plate away from the battery module and the housing. A thermal insulation structure is installed within this chamber to insulate the battery module. This results in better thermal insulation of the battery pack. By installing the thermal insulation structure between the support plate and the housing, the thermal insulation capability of the housing assembly is enhanced, preventing the battery module temperature from dropping too quickly.

[0006] Optionally, the housing includes a bottom wall and a side wall connected to each other, the bottom wall and the side wall forming the mounting space, and in the height direction of the housing assembly, the side of the support plate opposite to the battery module forms the heat-insulating chamber with the bottom wall.

[0007] In this embodiment, a thermal insulation chamber is formed between the support plate and the bottom wall, and an insulation structure is filled within the chamber. This provides better insulation for the bottom of the battery pack, reducing heat loss. Simultaneously, the support plate can be connected to the bottom wall via the insulation structure, forming a tight, integrated structure. The insulation structure also possesses sufficient strength, effectively enhancing the strength and rigidity of the support plate and bottom wall of the housing assembly, thus improving their safety.

[0008] Optionally, the support plate includes an interconnected protrusion and a connecting portion, the protrusion protruding relative to the connecting portion toward a side away from the bottom wall.

[0009] The protrusion can be used to limit the battery module, and the structure of the protrusion and the connecting part can facilitate the installation of the battery module.

[0010] Optionally, the heat-insulating chamber includes a first chamber and a convex chamber that are connected to each other, and the connecting part includes a first sub-part and a second sub-part that are connected to each other. The first sub-part is connected to the bottom wall, the second sub-part and the bottom wall form the first chamber, and the convex part and the bottom wall form the convex chamber.

[0011] The insulation chamber is configured as a first chamber and a convex chamber. By separately processing and designing the shapes of the connecting part and the convex part, the first chamber and the convex chamber can be shaped separately. The processing technology is simple and low-cost, and it can better insulate the battery module. The first chamber and the convex chamber are connected, so that the insulation structure can be injected into the first chamber and then inserted into the convex chamber.

[0012] Optionally, the protruding cavity includes a second cavity, and the protrusion includes a first rib extending along the length direction of the housing assembly, with the second cavity provided on the side of the first rib facing the bottom wall.

[0013] Multiple first ribs are distributed along the width direction of the housing assembly at opposite ends of the support plate. The support plate is mainly used to support and install the battery module. The first ribs on the support plate serve two purposes: firstly, the first ribs at opposite ends of the support plate can facilitate the installation of the battery module along the width direction of the housing assembly, making it easier to install the battery module onto the support plate. Secondly, a heat-insulating structure is installed in the second cavity formed between the first rib and the bottom wall, thus providing good heat insulation at the first rib.

[0014] Optionally, the protruding cavity includes a third cavity communicating with the second cavity, and the protrusion includes a second rib extending along the width direction of the housing assembly; the side of the second rib facing away from the bottom wall is used for mounting the battery module, and the third cavity is formed between the second rib and the bottom wall. There are multiple second ribs, spaced apart along the length direction of the housing assembly.

[0015] A second rib is provided on the support plate. On the one hand, the second ribs located at opposite ends of the support plate facilitate the installation of the battery module onto the support plate along the length of the housing assembly. On the other hand, an insulation structure is installed in the third chamber formed between the second rib and the bottom wall, thereby providing good insulation at the second rib.

[0016] Optionally, the second sub-part is provided with a first through hole communicating with the first chamber.

[0017] The thermal insulation structure in a flowing state can enter the first chamber through the first through hole, and can flow into the second chamber and the third chamber through the first chamber.

[0018] Optionally, there are multiple first through holes, and the minimum distance between any two adjacent first through holes is in the range of 100mm-200mm.

[0019] The first through-hole has multiple openings, which facilitates the injection of expanding foam into the first chamber through different openings, ensuring that the first chamber is evenly filled with expanding foam. Optionally, along the height direction of the housing assembly, the minimum distance between the projection of the first through hole on the insulation structure and the edge of the insulation structure ranges from 50mm to 100mm.

[0020] This design allows the expanding foam to fill the first chamber more fully.

[0021] Optionally, the bottom wall is provided with a convex hull structure, the convex hull structure including a first part and a second part, the second part being connected to the side of the first sub-part facing the bottom wall, and the first part being connected between the bottom wall and the second part.

[0022] The convex hull structure is multiple, and the multiple convex hull structures are arranged in an array. The interval between any two adjacent convex hull structures is in the range of 50mm~60mm.

[0023] The bottom wall has a convex structure, which connects to the first sub-section of the support plate. The convex structure and the first sub-section of the support plate can be welded together. By connecting the convex structure to the first sub-section of the support plate, the direct heat transfer area between the support plate and the bottom wall is reduced, and the volume of the first chamber between the bottom wall and the support plate is increased, thereby filling more insulation structure and achieving better insulation effect.

[0024] Optionally, the first rib is provided with a second through hole communicating with the second chamber.

[0025] The second through hole can be used for liquid injection or venting, making it convenient for liquid injection and venting.

[0026] Optionally, there are multiple second through holes, which are arranged along the length of the housing assembly, and the spacing between two adjacent second through holes ranges from 50mm to 100mm.

[0027] This allows the insulation structure to be injected through the second through hole, enabling the insulation structure to fill the second chamber more fully.

[0028] Optionally, the housing assembly further includes a crossbeam connected to the bottom wall, with a portion of the support plate located on the side of the crossbeam facing away from the bottom wall.

[0029] This design further strengthens the enclosure components.

[0030] According to a second aspect of this application, a battery pack is provided, including a battery module and the aforementioned housing assembly, wherein the battery module is mounted in the mounting space.

[0031] According to a third aspect of this application, an electrical device is also provided, including the aforementioned housing assembly, or including the aforementioned battery pack.

[0032] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0034] Figure 1 This is an exploded view of the housing assembly provided in an exemplary embodiment of this disclosure; Figure 2 This is a schematic diagram of the overall structure of the housing assembly provided in an exemplary embodiment of this disclosure; Figure 3 This is a top view of the housing assembly provided in an exemplary embodiment of this disclosure; Figure 4 yes Figure 3 A cross-sectional view of the housing assembly along the AA direction provided in the document; Figure 5 yes Figure 4 Enlarged schematic diagram of part B; Figure 6 This is another cross-sectional view of the housing assembly provided in the exemplary embodiments of this disclosure; Figure 7 yes Figure 6 An enlarged schematic diagram of section C; Figure 8 This is another cross-sectional view of the housing assembly provided in the exemplary embodiments of this disclosure; Figure 9 yes Figure 8An enlarged schematic diagram of section D in the middle; Figure 10 This is a schematic diagram of the structure of the support plate provided in an exemplary embodiment of this disclosure; Figure 11 This is a block diagram of electrical equipment.

[0035] Explanation of reference numerals in the attached figures: 100. Enclosure assembly; 10. Shell; 11. Bottom wall; 111. Convex bulge structure; 112. First part; 113. Second part; 13. Side wall; 15. Installation space; 20. Support plate; 201. Protrusion; 21. First rib; 211. Second through hole; 23. Second protruding rib; x, length direction of the housing assembly; y, width direction of the housing assembly; z, height direction of the housing assembly; 25, connecting part; 251, first sub-part; 253, second sub-part; 27. First through hole; 30. Thermal insulation structure; 31. First substructure; 32. Second substructure; 33. Third substructure; 40. Insulation chamber; 401. Projection chamber; 41. First chamber; 43. Second chamber; 45. Third chamber; 50. Crossbeam; 60. Module mounting cavity; 71. Solder joint; 200. Battery pack; 210. Battery module; 300. Electrical equipment. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0037] Please combine Figure 11 This application provides a housing assembly 100 for use in a battery pack 200. Please refer to... Figure 1 In some embodiments, the battery pack 200 may include a battery module 210 and a housing assembly 100, with an installation space 15 inside the housing assembly 100, and the battery module 210 is installed in the installation space 15.

[0038] The battery module 210 may include multiple battery cells, which can be electrically connected via a busbar. "Multiple battery cells" specifically refers to two or more battery cells, such as two, three, or four. These multiple battery cells can be connected in series, in parallel, or a combination of both.

[0039] Please combine Figure 1 , Figure 5 and Figure 7 The housing assembly 100 may specifically include a housing 10, a support plate 20, and a thermal insulation structure 30. The housing 10 has an installation space 15; the support plate 20 is connected to the housing 10 and located within the installation space 15, and is used to install the battery module 210; a thermal insulation chamber 40 is formed between the side of the support plate 20 away from the battery module 210 and the housing 10; the thermal insulation structure 30 is installed in the thermal insulation chamber 40.

[0040] In this embodiment, a battery module 210 is mounted on one side of the support plate 20. A heat-insulating chamber 40 is formed between the side of the support plate 20 away from the battery module 210 and the housing 10. A heat-insulating structure 30 is installed within the heat-insulating chamber 40, which provides heat insulation for the battery module 210. This results in better heat insulation for the battery pack 200. By installing the heat-insulating structure 30 between the support plate 20 and the housing 10, the heat insulation capability of the housing assembly 100 is enhanced, preventing the battery module 210 from cooling down too quickly.

[0041] Meanwhile, the insulation structure 30 is filled into the insulation chamber 40, and the support plate 20 can be connected to the shell 10 through the insulation structure 30. Thus, the support plate 20, the insulation structure 30 and the shell 10 can be connected into a relatively tight whole, thereby increasing the strength and rigidity of the box assembly 100 and enhancing the safety of the box assembly 100.

[0042] The insulation structure 30 can be made of expanded polystyrene, insulating foam, etc. In some examples, the insulation structure 30 is made of expanded polystyrene.

[0043] Please combine Figure 1 and Figure 2 In some embodiments, the housing 10 may specifically include a bottom wall 11 and a side wall 13 connected to each other, the bottom wall 11 and the side wall 13 forming the aforementioned mounting space 15. Please refer to... Figure 4 , Figure 5 In the height direction z of the housing assembly, the support plate 20, on the side opposite to the battery module 210, forms the aforementioned heat-insulating chamber 40 with the bottom wall 11.

[0044] When the battery pack 200 is placed, the bottom of the battery pack 200 dissipates heat quickly, causing the battery module 210 to cool down too rapidly. In this embodiment, a heat-insulating chamber 40 is formed between the support plate 20 and the bottom wall 11, and a heat-insulating structure 30 is filled in the heat-insulating chamber 40, thereby providing better heat insulation for the bottom of the battery pack 200 and reducing heat loss at the bottom of the battery pack 200. At the same time, the support plate 20 can be connected to the bottom wall 11 through the heat-insulating structure 30, and the support plate 20, the heat-insulating structure 30, and the bottom wall 11 can be connected into a tight whole. The heat-insulating structure 30 also has a certain strength, thereby effectively strengthening the strength and rigidity of the support plate 20 and the bottom wall 11 of the housing assembly 100, thus enhancing the safety of the support plate 20 and the bottom wall 11.

[0045] In addition, by increasing the rigidity of the support plate 20 and bottom wall 11 of the box assembly 100, the thickness of the beam can be reduced appropriately, thereby reducing the cost of the box assembly.

[0046] In some embodiments, the insulation structure 30 may have both a flowing state and a solidified state. The flowing insulation structure 30 can be easily injected into the insulation chamber 40. The injected insulation structure 30 will solidify and fill the insulation chamber 40. It is readily understood that the shape of the solidified insulation structure 30 may correspond to the shape of the insulation chamber 40. In other words, the shape of the insulation chamber 40 defines the shape of the solidified insulation structure 30.

[0047] In some embodiments, the insulation structure 30 entering the insulation chamber 40 can fully fill the space between the support plate 20 and the bottom wall 11, after which the flowing insulation structure 30 switches to a solidified state, thus stably filling the space between the support plate 20 and the bottom wall 11.

[0048] The battery module 210 is mounted on the support plate 20, which provides an installation environment for the battery module 210. The support plate 20 can be connected to the housing 10 by resistance welding.

[0049] Please combine Figure 8 The support plate 20 includes a protrusion 201 and a connecting portion 25 connected to each other. The protrusion 201 protrudes relative to the connecting portion 25 toward the side opposite to the bottom wall 11. The protrusion 201 can be used to limit the battery module 210. The structure of the protrusion 201 and the connecting portion 25 can facilitate the installation of the battery module 210.

[0050] Please combine Figure 7 , Figure 9The heat-insulating chamber 40 includes a first chamber 41 and a protruding chamber 401 that are connected to each other. The connecting part 25 includes a first sub-part 251 and a second sub-part 253 that are connected to each other. The first sub-part 251 is connected to the bottom wall 11, the second sub-part 253 and the bottom wall 11 form the first chamber 41, and the protruding part 201 and the bottom wall 11 form the protruding chamber 401. The first sub-part 251 and the second sub-part 253 can be integrally formed.

[0051] Both the first chamber 41 and the protruding chamber 401 can be equipped with heat-insulating structures 30. By configuring the heat-insulating chamber 40 as the first chamber 41 and the protruding chamber 401, and by designing the shapes of the connecting part 25 and the protrusion 201 respectively, the first chamber 41 and the protruding chamber 401 can be shaped separately. This process is simple, low-cost, and provides better heat insulation for the battery module 210. The first chamber 41 and the protruding chamber 401 are connected, so that by injecting the heat-insulating structure 30 into the first chamber 41, the heat-insulating structure 30 can enter the protruding chamber 401.

[0052] Please combine Figure 3 as well as Figure 10 The convex cavity 401 includes a second cavity 43. The convex part 201 includes a first rib 21 extending along the length direction x of the housing assembly. The second cavity 43 is provided on the side of the first rib 21 facing the bottom wall 11.

[0053] On the one hand, the first rib 21 can install and limit the battery module 210, preventing the battery module 210 from shifting. There can be one or more first ribs 21, as long as they can install and limit the battery module 210. On the other hand, a heat insulation structure 30 is installed in the second cavity 43 formed between the first rib 21 and the bottom wall 11, so that the first rib 21 has a good heat insulation effect.

[0054] The support plate 20 is mainly used to support and install the battery module 210, and a first rib 21 is provided on the support plate 20.

[0055] There are multiple first protruding ribs 21, distributed along the width direction y of the box assembly at opposite ends of the support plate 20.

[0056] The first protruding ribs 21 located at opposite ends of the support plate 20 can limit the battery module 210 in the width direction y of the housing assembly, preventing the battery module 210 from moving in the width direction y of the housing assembly, and facilitating the installation of the battery module 210 onto the support plate 20.

[0057] In some examples, along the width direction y of the housing assembly, a first rib 21 is respectively provided at opposite ends of a support plate 20. The two first ribs 21 are arranged in parallel and spaced apart, and each first rib 21 extends along the length direction x of the housing assembly. Further, the housing assembly 100 may include a bracket. Along the height direction z of the housing assembly, the bracket is mounted on the support plate 20, and the battery module 210 is connected to the bracket. One end of the bracket may be located on and connected to the first rib 21, and the end of the bracket facing the battery module 210 may be connected to the battery module 210. The battery module 210 is installed between the two first ribs 21.

[0058] Please combine Figure 8 , Figure 9 as well as Figure 10 The convex cavity 401 includes a third cavity 45 communicating with the second cavity 43. The convex portion 201 includes a second rib 23 extending along the width direction y of the housing assembly. The side of the second rib 23 facing away from the bottom wall 11 is used to install the battery module 210. The third cavity 45 is formed between the second rib 23 and the bottom wall 11.

[0059] A second rib 23 is provided on the support plate 20. On the one hand, the second rib 23 located on the support plate 20 can facilitate the installation of the battery module 210 in the length direction x of the housing assembly, making it easier to install the battery module 210 onto the support plate 20. On the other hand, a heat insulation structure 30 is installed in the third chamber 45 formed between the second rib 23 and the bottom wall 11, thereby giving the second rib 23 a better heat insulation effect.

[0060] The cooperation between the second rib 23 and the first rib 21 allows the battery module 210 to be installed better, and the second rib 23 and the first rib 21 can better insulate the battery module 210 and reduce the heat loss of the battery module 210.

[0061] Furthermore, the housing assembly 100 may include multiple brackets. Along the height direction z of the housing assembly, some of the brackets may be located on and connected to the second rib 23. The battery module 210 is mounted on the brackets. That is, along the height direction z of the housing assembly, the battery module 210, the brackets, and the second rib 23 are arranged in sequence.

[0062] There can be multiple second protruding ribs 23, and multiple second protruding ribs 23 are spaced apart along the length direction x of the box assembly.

[0063] The second ribs 23 located at opposite ends of the support plate 20 facilitate the installation of the battery module 210 onto the support plate 20. A heat-insulating structure 30 is installed in the third chamber 45 formed between the second rib 23 and the bottom wall 11, thus providing good heat insulation at the second rib 23. Through the cooperation of the second rib 23 and the first rib 21, the battery module 210 can be better installed and positioned, and the second rib 23 and the first rib 21 can better insulate the battery module 210, reducing heat loss.

[0064] Furthermore, multiple second ribs 23 are spaced apart. Along the length x of the housing assembly, both ends of a battery module 210 can be respectively mounted on two spaced second ribs 23, thus allowing a portion of the battery module 210 structure to have a gap with the bottom wall, which can be filled with foam. This reduces heat transfer from the battery module 210 to the bottom wall, reduces heat loss of the battery module 210, and improves the heat preservation effect.

[0065] In some examples, please combine Figure 10 In a support plate 20, there are two second ribs 23, or three second ribs 23, with the second ribs 23 connected between two other second ribs 23. In some examples, depending on the shape of the battery module, second ribs 23 may also be provided at positions between opposite ends of the support plate 20 along the length x of the housing assembly.

[0066] The connecting part 25 can be connected between the first protruding rib 21 and the second protruding rib 23 respectively, and forms a module mounting cavity 60 with the first protruding rib 21 and the second protruding rib 23. The module mounting cavity 60 is used to install the battery module 210. The first chamber 41 is filled with the heat insulation structure 30, which can insulate the bottom of the battery module 210. The third chamber 45 and the second chamber 43 can insulate the ends of the battery module 210.

[0067] The insulation chamber 40 includes a first chamber 41, a second chamber 43, and a third chamber 45 that are connected. The filling and insulation of the first chamber 41, the second chamber 43, and the third chamber 45 can be achieved by injecting expanding foam into one of the chambers.

[0068] Please combine Figure 6 , Figure 7 The second sub-part 253 is provided with a first through hole 27 that communicates with the first chamber 41.

[0069] In some embodiments, the insulation structure 30 can have a flowing state and a solidified state. The flowing insulation structure 30 can enter the first chamber 41 through the first through-hole 27, and then flow into the second chamber 43 and the third chamber 45. The insulation structure 30 entering the first chamber 41 can fully fill the space between the support plate 20 and the bottom wall 11, after which the flowing insulation structure 30 switches to a solidified state, thus stably filling the space between the support plate 20 and the bottom wall 11.

[0070] The first through hole 27 can be used for liquid injection, such as expanding foam or other liquids, or for venting, making it convenient for liquid injection and venting.

[0071] The diameter of the first through hole 27 can be in the range of 5mm-7mm. For example, the diameter of the first through hole 27 can be 5mm, 6mm, or 7mm.

[0072] The insulation structure 30 can be made of expanding foam. Expanding foam can be injected into the first through hole 27 through the injection head. At this time, the expanding foam is in liquid state. The liquid expanding foam enters the first chamber 41 through the first through hole 27 and solidifies in the first chamber 41, thereby forming the insulation structure 30 that fills the space between the support plate 20 and the bottom wall 11.

[0073] Please combine Figure 7 , Figure 10 There are multiple first through holes 27, and the minimum distance L between any two adjacent first through holes 27 is in the range of 100mm-200mm.

[0074] There are multiple first through holes 27, which facilitates the injection of expanding foam into the first chamber 41 from different first through holes 27, so that the first chamber 41 can be uniformly filled with expanding foam. Among them, a number of first through holes 27 can be arranged along the length x direction of the box assembly, and a number of first through holes 27 can be arranged along the width y direction of the box assembly.

[0075] Please combine Figure 3 Along the height direction z of the box assembly, the minimum distance M between the projection of the first through hole 27 on the insulation structure 30 and the edge of the insulation structure 30 ranges from 50mm to 100mm.

[0076] This design allows the expanding foam to fill the first chamber 41 more fully.

[0077] The minimum distance between the projection of the first through hole 27 on the thermal insulation structure 30 and the edge of the thermal insulation structure 30 can be 50mm, 60mm, 70mm, 80mm, 90mm, or 100mm.

[0078] After expanding foam is injected into the first chamber 41 through the first through hole 27, it solidifies into a thermal insulation structure 30 with a certain shape within the first chamber 41. The solidified edge of the expanding foam is the edge of the thermal insulation structure 30. The minimum distance M between the projection of the first through hole 27 onto the thermal insulation structure 30 and the edge of the thermal insulation structure 30 reflects the filling capacity of the thermal insulation structure 30 for the first chamber 41. When the minimum distance M between the projection of the first through hole 27 onto the thermal insulation structure 30 and the edge of the thermal insulation structure 30 is in the range of 50mm-100mm along the height z of the housing assembly, the expanding foam can flow sufficiently in the first chamber 41 to form the desired shape of the thermal insulation structure 30, allowing the thermal insulation structure 30 to fill the first chamber 41 more fully.

[0079] Please combine Figure 6 , Figure 7 The bottom wall 11 is provided with a convex bulge structure 111, which includes a first part 112 and a second part 113. The second part 113 is connected to the side of the first sub-part 251 facing the bottom wall 11, and the first part 112 is connected between the bottom wall 11 and the second part 113. That is, the convex bulge structure 111 protrudes in the direction towards the first sub-part 251, and the protruding part is connected to the first sub-part 251. The first part 112 and the second part 113 can be integrally formed.

[0080] The bottom wall 11 is provided with a convex structure 111, which is connected to the first sub-part 251 of the support plate 20 through the second part 113 of the convex structure 111. The convex structure 111 and the first sub-part 251 of the support plate 20 can be welded together, and the position of the weld point 71 can be referenced. Figure 2 By connecting the convex bulge structure 111 to the first sub-part 251 of the support plate 20, the direct heat transfer area between the support plate 20 and the bottom wall 11 can be reduced, and the volume of the first chamber 41 between the bottom wall 11 and the support plate 20 can be increased, thereby filling more insulation structure 30 and achieving better insulation effect.

[0081] There are multiple convex hull structures 111, arranged in an array. The interval between any two adjacent convex hull structures 111 ranges from 50mm to 60mm. The interval values ​​for any two adjacent convex hull structures 111 can be 50mm, 51mm, 52mm, 53mm, 54mm, 55mm, 56mm, 57mm, 58mm, 59mm, or 60mm. This arrangement ensures a tighter and more reliable connection between the bottom wall 11 and the support plate 20, and also allows for the inclusion of more insulation structure 30, resulting in better insulation performance.

[0082] Please combine Figure 1 , Figure 8 as well as Figure 9Along the height direction z of the housing assembly, the height of the second chamber 43 is greater than the height of the first chamber 41.

[0083] Along the height direction z of the housing assembly, the height of the second chamber 43 is greater than the height of the third chamber 45.

[0084] Please combine Figure 8 , Figure 9 Along the height direction z of the housing assembly, the height of the first rib 21 is greater than the height of the second rib 23, and the height of the first rib 21 is greater than the height between the second sub-part 253 and the bottom wall 11. The height of the second chamber 43 is greater than the height of the third chamber 45, and the height of the second chamber 43 is greater than the height of the first chamber 41. The insulation structure 30 in a flowing state can be easily injected into the insulation chamber 40. The injected insulation structure 30 will solidify and fill the insulation chamber 40. It is easy to understand that the shape of the solidified insulation structure 30 and the shape of the insulation chamber 40 can have a corresponding relationship. In other words, the shape of the insulation chamber 40 defines the shape of the solidified insulation structure 30. Please refer to... Figure 1 The insulation structure 30 may include a first substructure 31, a second substructure 32, and a third substructure 33 connected to each other. The first substructure 31 is installed in the second chamber 43, and the shape of the first substructure 31 is adapted to the shape of the second chamber 43. The second substructure 32 is installed in the first chamber 41, and the shape of the second substructure 32 is adapted to the shape of the first chamber 41. The third substructure 33 is installed in the third chamber 45, and the shape of the third substructure 33 is adapted to the shape of the third chamber 45. Specifically, foaming adhesive can be injected into the first chamber 41 through the first through hole 27, and the foaming adhesive can be cured in the first chamber 41 to form the second substructure 32. Foam is injected into the second chamber 43 through the second through hole 211. The foam cures in the second chamber 43 to form the first substructure 31. Since the first chamber 41, the second chamber 43, and the third chamber 45 are connected, the foam injected through the first through hole 27 and the second through hole 211 can enter the third chamber 45. The foam that enters the third chamber 45 cures to form the third substructure 33. Along the height direction z of the housing assembly, the height of the first substructure 31 is greater than the height of the second substructure 32, and the height of the third substructure 33 is greater than the height of the second substructure 32.

[0085] Along the height direction z of the enclosure assembly, the height of the insulation chamber 40 ranges from 3mm to 8mm. For example, it can be 3mm, 4mm, 5mm, 6mm, 7mm, or 8mm. This facilitates the flow and filling of the expanding foam. Since the expanding foam has a certain viscosity, when the height of the insulation chamber 40 is less than 3mm, the flow and filling effect of the expanding foam is poor.

[0086] The first rib 21 may be provided with a second through hole 211 that communicates with the second chamber 43.

[0087] The second through hole 211 can be used for liquid injection or venting, making it convenient for liquid injection and venting.

[0088] The diameter of the second through hole 211 can be in the range of 5mm-7mm. For example, the diameter of the second through hole 211 can be 5mm, 6mm, or 7mm.

[0089] Foam can be injected into the second through hole 211 through the injection head. At this time, the foam is in liquid state. The liquid foam enters the second chamber 43 through the second through hole 211 and solidifies in the second chamber 43, thereby forming a heat insulation structure 30 that fills the space between the support plate 20 and the bottom wall 11.

[0090] There are multiple second through holes 211, which are arranged along the length x of the housing assembly. The spacing between two adjacent second through holes 211 ranges from 50mm to 100mm. This allows the insulation structure 30 to be injected through the second through holes 211, enabling the insulation structure 30 to fill the second chamber 43 more fully.

[0091] The spacing between two adjacent second through holes 211 can be 50mm, 60mm, 70mm, 80mm, 90mm, or 100mm.

[0092] Please combine Figure 1 The enclosure assembly 100 may also include a crossbeam 50 connected to the bottom wall 11, with a portion of the support plate 20 located on the side of the crossbeam 50 facing away from the bottom wall 11. This arrangement further strengthens the enclosure assembly 100.

[0093] In some embodiments, the housing assembly 100 may also include fasteners, which may be rivet nuts.

[0094] In some embodiments, a portion of the crossbeam 50 is located between the bottom wall 11 and the support plate 20. The insulation structure 30 can be filled between the crossbeam 50, the bottom wall 11, and the support plate 20. The crossbeam 50, the support plate 20, and the bottom wall 11 of the enclosure can be welded together by resistance welding, and the openings around the perimeter can be sealed with sealant to create a sealed installation environment and prevent the expansion foam from overflowing.

[0095] Please combine Figure 11 According to a second aspect of this disclosure, a battery pack 200 is provided, including a battery module 210 and the aforementioned housing assembly 100, wherein the battery module 210 is mounted in an installation space 15. This battery pack 200 has all the beneficial effects of the aforementioned housing assembly 100, which will not be elaborated further herein.

[0096] Please combine Figure 11 According to a third aspect of this disclosure, an electrical appliance 300 is provided, including the aforementioned housing assembly 100, or including the aforementioned battery pack 200. This electrical appliance 300 possesses all the beneficial effects of the aforementioned housing assembly 100 or the aforementioned battery pack 200, which will not be elaborated further herein. Figure 11 The relationship between the battery module 210 and the housing assembly 100 shown in the block diagram only indicates that the battery module 210 is installed inside the housing assembly 100.

[0097] The electrical equipment 300 can be robots, vehicles, etc.

[0098] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0099] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0100] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0101] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A housing assembly (100), characterized in that, include: The housing (10) has an installation space (15); A support plate (20) is connected to the housing (10) and located in the installation space (15). The support plate (20) is used to install the battery module (210). The side of the support plate (20) away from the battery module (210) forms a heat-insulating chamber (40) with the housing (10). The thermal insulation structure (30) is installed in the thermal insulation chamber (40).

2. The housing assembly (100) according to claim 1, characterized in that, The housing (10) includes a bottom wall (11) and a side wall (13) connected to each other, the bottom wall (11) and the side wall (13) forming the mounting space (15). In the height direction (z) of the housing assembly, the support plate (20) on the side opposite to the battery module (210) forms the heat insulation chamber (40) with the bottom wall (11).

3. The housing assembly (100) according to claim 2, characterized in that, The support plate (20) includes a protrusion (201) and a connecting portion (25) connected to each other, the protrusion (201) protruding relative to the connecting portion (25) toward the side away from the bottom wall (11).

4. The housing assembly (100) according to claim 3, characterized in that, The heat-insulating chamber (40) includes a first chamber (41) and a convex chamber (401) that are connected to each other. The connecting part (25) includes a first sub-part (251) and a second sub-part (253) that are connected to each other. The first sub-part (251) is connected to the bottom wall (11), the second sub-part (253) and the bottom wall (11) form the first chamber (41), and the convex part (201) and the bottom wall (11) form the convex chamber (401).

5. The housing assembly (100) according to claim 4, characterized in that, The protruding chamber (401) includes a second chamber (43), and the protrusion (201) includes a first rib (21) extending along the length direction (x) of the housing assembly, wherein: The first rib (21) has a second chamber (43) on the side facing the bottom wall (11), and / or, there are multiple first ribs (21); along the width direction (y) of the box assembly, multiple first ribs (21) are distributed at opposite ends of the support plate (20).

6. The housing assembly (100) according to claim 5, characterized in that, The protruding chamber (401) includes a third chamber (45) communicating with the second chamber (43). The protrusion (201) includes a second rib (23) extending along the width direction (y) of the housing assembly. The side of the second rib (23) facing away from the bottom wall (11) is used to install the battery module (210). The third chamber (45) is formed between the second rib (23) and the bottom wall (11).

7. The housing assembly (100) according to claim 6, characterized in that, There are multiple second ribs (23); multiple second ribs (23) are spaced apart along the length direction (x) of the box assembly.

8. The housing assembly (100) according to any one of claims 4-7, characterized in that, The second sub-part (253) is provided with a first through hole (27) communicating with the first chamber (41).

9. The housing assembly (100) according to claim 8, characterized in that, There are multiple first through holes (27), and the minimum distance between any two adjacent first through holes (27) is in the range of 100mm-200mm.

10. The housing assembly (100) according to claim 8, characterized in that, Along the height direction (z) of the housing assembly, the minimum distance between the projection of the first through hole (27) on the insulation structure (30) and the edge of the insulation structure (30) is 50mm-100mm.

11. The housing assembly (100) according to any one of claims 4-7, characterized in that, The housing (10) further includes a convex hull structure (111), which includes a first part (112) and a second part (113). The second part (113) is connected to the side of the first sub-part (251) facing the bottom wall (11), and the first part (112) is connected between the bottom wall (11) and the second part (113).

12. The housing assembly (100) according to claim 11, characterized in that, There are multiple convex hull structures (111), and the multiple convex hull structures (111) are arranged in an array. The interval between any two adjacent convex hull structures (111) is in the range of 50mm~60mm.

13. The housing assembly (100) according to claim 5, characterized in that, The first protruding rib (21) is provided with a second through hole (211) communicating with the second chamber (43).

14. The housing assembly (100) according to claim 13, characterized in that, There are multiple second through holes (211), and the multiple second through holes (211) are arranged along the length direction (x) of the housing assembly. The distance between two adjacent second through holes (211) is in the range of 50mm to 100mm.

15. The housing assembly (100) according to any one of claims 2 to 7, characterized in that, The housing assembly (100) also includes a crossbeam (50) connected to the bottom wall (11), and a portion of the support plate (20) is located on the side of the crossbeam (50) away from the bottom wall (11).

16. A battery pack (200), characterized in that, Includes a battery module (210) and a housing assembly (100) as described in any one of claims 1-15, wherein the battery module (210) is mounted in the mounting space (15).

17. An electrical appliance (300), characterized in that, It includes the housing assembly (100) as described in any one of claims 1-15, or the battery pack (200) as described in claim 16.

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