Box, battery pack and electric device

Abstract

The application relates to the technical field of battery pack boxes, and provides a box, a battery pack and an electric device, wherein the box comprises: a frame, which encloses a containing space, the containing space comprises a first containing cavity and a second containing cavity extending along a first direction, along the first direction, the frame has opposite first and second ends, one end of the first containing cavity away from the second containing cavity extends to the first end and forms a first opening, one end of the second containing cavity away from the first containing cavity extends to the second end, the cross-sectional area of the first containing cavity is larger than that of the second containing cavity, and the cross section is perpendicular to the first direction; a liquid cooling assembly, which is at least partially contained in the first containing cavity; and a bottom guard plate connected to the first end and covering the first opening. Through the technical scheme, the liquid cooling assembly can be prevented from contacting the external environment, and the corrosion problem can be reduced.

Description

Technical Field

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

[0002] The heat exchange plates (such as heat spreaders or liquid cooling plates) of existing battery modules or battery packs are generally located at the bottom of the frame, and the edges of the heat exchange plates are flush with the frame. That is, the size and shape of the heat exchange plates are exactly matched with the shape and size of the opening at the bottom of the frame. This means that when the heat exchange plates are connected to the frame, the edges are in direct contact with the external environment. In harsh weather conditions, the heat exchange plates are easily corroded. As the corrosion intensifies, it can easily cause fluid leakage inside the heat exchange plates. Utility Model Content

[0003] The technical problem to be solved by this application is to provide a housing, battery pack and electrical device that can prevent the liquid cooling components from contacting the external environment and reduce corrosion problems.

[0004] To solve the above-mentioned technical problems, this application adopts the following technical solution: This application provides a housing, comprising: a frame enclosing a receiving space, the receiving space including a first receiving cavity and a second receiving cavity extending along a first direction, the frame having a first end and a second end opposite to each other along the first direction, the end of the first receiving cavity away from the second receiving cavity extending to the first end and forming a first opening, the end of the second receiving cavity away from the first receiving cavity extending to the second end, the cross-sectional area of ​​the first receiving cavity being larger than the cross-sectional area of ​​the second receiving cavity, the cross-section being perpendicular to the first direction; a liquid cooling assembly, at least partially received within the first receiving cavity; and a bottom protective plate connected to the first end and covering the first opening.

[0005] In the implementation of the above solution, the housing includes: a frame enclosing a receiving space, the receiving space including a first receiving cavity and a second receiving cavity extending along a first direction; along the first direction, the frame has a first end and a second end opposite to each other; the end of the first receiving cavity away from the second receiving cavity extends to the first end and forms a first opening, the other end of which can communicate with the second receiving cavity; the end of the second receiving cavity away from the first receiving cavity extends to the second end and forms a second opening; the cross-sectional area of ​​the first receiving cavity is larger than the cross-sectional area of ​​the second receiving cavity, and the cross-section is perpendicular to the first direction; the housing also includes a liquid cooling component, at least partially housed within the first receiving cavity, since the cross-sectional area of ​​the first receiving cavity is larger than the cross-sectional area of ​​the second receiving cavity. The frame provides support for the liquid cooling component when it is placed in the first receiving cavity, improving its stability. Simultaneously, the first receiving cavity formed by the frame protects the liquid cooling component, preventing it from being flush with the bottom or top surface of the frame and reducing contact between the liquid cooling component's periphery and the external environment, thus minimizing corrosion. Furthermore, the bottom protective plate, connected to the first end and covering the first opening, protects the liquid cooling component, preventing it from being exposed in the first direction. In short, the first receiving cavity formed by the frame reduces contact between the liquid cooling component's periphery and the external environment, while the bottom protective plate prevents contact in the first direction, reducing corrosion and improving the battery pack's safety performance.

[0006] In one embodiment, the liquid cooling assembly includes a vapor chamber and a water-cooling pipe. At least a portion of the vapor chamber is housed in the first receiving cavity and covers one end of the second receiving cavity near the first receiving cavity. The water-cooling pipe is located between the vapor chamber and the bottom protective plate and is thermally connected to the vapor chamber.

[0007] In the implementation of the above solution, the liquid cooling component includes a heat spreader and a water cooling pipe. At least a portion of the heat spreader is housed in the first receiving cavity and covers the end of the second receiving cavity near the first receiving cavity. That is, the heat spreader separates the first receiving cavity from the second receiving cavity. The water cooling pipe is located between the heat spreader and the bottom protective plate and is thermally connected to the heat spreader. The water cooling pipe can exchange heat, thereby achieving heat exchange for the battery cells within the frame. At the same time, since the water cooling pipe is located between the bottom protective plate and the heat spreader, it reduces the occupation of the side of the heat spreader away from the bottom protective plate, that is, it reduces the occupation of the second receiving cavity, which is used to house the battery cells. Reducing the occupation of the second receiving cavity can improve the energy density of the battery module.

[0008] In one embodiment, the liquid cooling assembly includes a thermally conductive adhesive layer, which is at least partially located between the heat spreader and the water cooling pipe, and connects the heat spreader and the water cooling pipe.

[0009] In the implementation of the above solution, the heat spreader and the water cooling pipe are connected by a thermally conductive adhesive layer. Compared with the prior art where the upper plate is a flat heat spreader and the lower plate is a stamped plate with flow channels, and the upper and lower plates need to be coated with brazing flux before being brazed in a brazing furnace, the water cooling pipe and the heat spreader in this embodiment are connected by adhesive, which can reduce production costs and improve assembly efficiency.

[0010] In one embodiment, the water-cooling pipe is a harmonica tube extending along a curved trajectory.

[0011] In the implementation of the above scheme, the water cooling pipe is a harmonica tube extending along the curved trajectory. On the one hand, the harmonica tube has a flat structure, which reduces the space occupied in the first receiving cavity. On the other hand, the flat structure of the harmonica tube can increase the contact area with the heat spreader and improve stability. At the same time, choosing a harmonica tube can also reduce production costs.

[0012] In one embodiment, the enclosure further includes an insulation layer, which is at least partially disposed between the temperature equalization plate and the bottom protective plate. In the implementation of the above solution, the enclosure also includes an insulation layer, which is at least partially set between the heat spreader and the bottom protective plate. By setting the insulation layer, a dual function of buffering and heat insulation is formed as the bottom structure of the enclosure. At the same time, the insulation layer fills the first accommodating cavity, which can also improve the sealing of the first accommodating cavity, prevent the liquid cooling components from contacting the external environment, and reduce the risk of corrosion of the liquid cooling components.

[0013] In one embodiment, the cavity wall of the first receiving cavity includes a first cavity side surface and a stepped surface, the second receiving cavity includes a second cavity side surface, and the stepped surface connects the first cavity side surface and the second cavity side surface; the heat equalization plate is connected to the stepped surface.

[0014] In the implementation of the above scheme, the cavity wall of the first receiving cavity includes a first cavity side surface and a step surface, the second receiving cavity includes a second cavity side surface, and the step surface connects the first cavity side surface and the second cavity side surface; the heat distribution plate is connected to the step surface, and the step surface can provide stable support for the heat distribution plate, so that the heat distribution plate can be connected to the frame.

[0015] In one embodiment, the heat spreader includes a protrusion located on one side of the frame, the protrusion protruding from one side of the frame; the water cooling pipe includes a first protruding section and a second protruding section, the first protruding section being used to connect to the liquid inlet pipe, and the second protruding section being used to connect to the liquid outlet pipe, the first protruding section and the second protruding section also protruding from one side of the frame, and the protruding direction is the same as the protruding direction of the protruding part; a notch is provided on one side of the frame, and the protruding part, the first protruding section and the second protruding section all protrude from the notch position.

[0016] In the implementation of the above scheme, by setting a protrusion, the first protruding segment and the second protruding segment are connected to the protrusion, thereby improving the stability between the first protruding segment and the second protruding segment and the protrusion; at the same time, the protrusion can support the inlet pipe and the outlet pipe, so that the first protruding segment can be connected to the inlet pipe and the second protruding segment can be connected to the outlet pipe; a notch is provided on one side of the frame, and the protrusion, the first protruding segment and the second protruding segment all protrude from the notch. By setting the notch, the protrusion, the first protruding segment and the second protruding segment can be avoided, so that the protrusion, the first protruding segment and the second protruding segment can protrude from one side of the frame.

[0017] In one embodiment, an inner cavity is formed inside the frame; a reinforcing member is disposed in the inner cavity of the frame, the reinforcing member includes a support portion and a filling material, the support portion has a cavity inside, the filling material fills the cavity, and the density of the support portion and the filling material is less than the density of the frame.

[0018] In the implementation of the above solution, an inner cavity is formed inside the frame; the box also includes a reinforcing member, which is set in the inner cavity of the frame and can provide structural reinforcement for the frame. The reinforcing member includes a support part and a filling material. A cavity is formed inside the support part, and the filling material is filled in the cavity. The density of the support part and the filling material is less than the density of the frame. Therefore, under the same volume, the weight of the support part and the filling material is less than the weight of the frame. This means that the inner cavity of the frame in this embodiment does not need to be provided with some ribs for support, but is replaced by the support part and the filling material. The support part can support the frame in the inner cavity, thereby improving the overall structural strength of the frame. Under bending or axial load, it can effectively share the external force. At the same time, the filling material filled in the cavity of the support part can absorb impact energy and improve fatigue life, thereby enabling the frame to be lightweight while taking into account structural strength.

[0019] In one embodiment, the cavity is provided with a plurality of spacers, the spacers being made of the same material as the support and connected to the support. The spacers divide the cavity into a plurality of receiving slots, the receiving slots extending along the extending direction of the support, and the filling material filling each of the receiving slots.

[0020] In the implementation of the above scheme, the cavity is provided with multiple partitions, which are connected to the support. The partitions divide the cavity inside the support into multiple receiving slots, which extend along the extension direction of the support. Filling material is filled into each receiving slot. The partitions divide the cavity into multiple receiving slots, making the entire cavity present a honeycomb structure. The honeycomb structure can improve the structural strength and absorb energy, converting impact kinetic energy into plastic deformation energy. The partitions and the support are made of the same material, which improves the structural strength while meeting the requirements of lightweighting. At the same time, each receiving slot is filled with filling material, which can absorb impact energy and improve fatigue life.

[0021] In one embodiment, the support portion and the spacer portion are glass fiber reinforced composite components.

[0022] In the implementation of the above solution, both the support part and the spacer part are glass fiber reinforced composite components. Under the same volume, the glass fiber reinforced composite component has a lower sealing performance than the aluminum profile. It can achieve the purpose of lightweight frame while meeting the structural strength requirements.

[0023] Secondly, this application also provides a battery pack, including the housing provided in the first aspect.

[0024] Thirdly, this application also provides an electrical device including the battery pack provided in the second aspect. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of the box provided in an embodiment of this application; Figure 2 These are structural schematic diagrams of the box from different perspectives provided in the embodiments of this application; Figure 3 This is an exploded structural diagram of the box provided in an embodiment of this application; Figure 4 Exploded structural diagrams of the box provided in the embodiments of this application from different perspectives; Figure 5 An exploded structural diagram of another part of the housing provided in an embodiment of this application; Figure 6 This is a top view of the exploded structure of the box provided in an embodiment of this application; Figure 7 for Figure 6 A schematic diagram of the cross-sectional structure along the AA direction; Figure 8 for Figure 7 A partially enlarged structural diagram; Figure 9 A top view of the housing provided in an embodiment of this application; Figure 10 for Figure 9 A schematic diagram of the cross-sectional structure along the BB direction; Figure 11 for Figure 10 A partially enlarged structural diagram.

[0027] Icons: 1-Border; 11-Inner cavity; 12-First receiving cavity; 121-Step surface; 13-Second receiving cavity; 2-Liquid cooling assembly; 21-Population plate; 211-Protrusion; 22-Water cooling pipe; 221-First protruding section; 222-Second protruding section; 3-Insulation layer; 4-Inlet pipe; 5-Outlet pipe; 6-Bottom protective plate; 7-Top cover plate; 8-Support part; 9-Separator part; 10-Receiving groove. Detailed Implementation

[0028] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0029] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0030] like Figures 2 to 4As shown in Figures 6 to 11, in a first aspect, embodiments of this application provide a housing, including: a frame 1 enclosing a receiving space, the receiving space including a first receiving cavity 12 and a second receiving cavity 13 extending along a first direction, the frame 1 having a first end and a second end opposite to each other along the first direction, the end of the first receiving cavity 12 away from the second receiving cavity 13 extending to the first end and forming a first opening, the other end being able to communicate with the second receiving cavity 13, the end of the second receiving cavity 13 away from the first receiving cavity 12 extending to the second end and forming a second opening, the cross-sectional area of ​​the first receiving cavity 12 being larger than the cross-sectional area of ​​the second receiving cavity 13, the cross-section being perpendicular to the first direction; the housing also includes a liquid cooling assembly 2, at least partially housed within the first receiving cavity 12, since the cross-sectional area of ​​the first receiving cavity 12 is larger than that of the second receiving cavity 13. The cross-sectional area of ​​the frame 1 allows the liquid cooling component 2 to be supported when placed in the first receiving cavity 12, improving its stability. Simultaneously, the first receiving cavity 12 formed by the frame 1 protects the liquid cooling component 2, preventing it from being flush with the bottom or top surface of the frame 1, reducing contact between the liquid cooling component 2 and the external environment, thus reducing corrosion. Furthermore, the bottom protective plate 6 of the housing is connected to the first end and covers the first opening, protecting the liquid cooling component 2 and preventing it from being exposed in the first direction. In short, the first receiving cavity 12 formed by the frame 1 reduces contact between the liquid cooling component 2 and the external environment, and the bottom protective plate 6 prevents contact between the liquid cooling component 2 and the external environment in the first direction, reducing corrosion and improving the safety performance of the battery pack.

[0031] Optionally, the first direction is the height direction of border 1.

[0032] Optionally, the bottom guard plate 6 can be made of metal or composite material, and the thickness is not limited. The outer surface of the bottom guard plate 6 can be coated with an anti-corrosion layer.

[0033] like Figure 1 and Figure 6 As shown, optionally, the housing also includes an upper cover plate 7, which is positioned at the second opening.

[0034] like Figure 3 and 4As shown in Figures 7 and 8, and 10 and 11, in one embodiment, the liquid cooling assembly 2 includes a heat spreader 21 and a water cooling pipe 22. At least a portion of the heat spreader 21 is housed in the first receiving cavity 12 and covers the end of the second receiving cavity 13 near the first receiving cavity 12. That is, the heat spreader 21 separates the first receiving cavity 12 from the second receiving cavity 13. The water cooling pipe 22 is located between the heat spreader 21 and the bottom protective plate 6 and is thermally connected to the heat spreader 21. The water cooling pipe 22 can exchange heat, thereby realizing heat exchange for the battery cells in the frame 1. At the same time, since the water cooling pipe 22 is arranged between the bottom protective plate 6 and the heat spreader 21, it reduces the occupation of the side of the heat spreader 21 away from the bottom protective plate 6, that is, it reduces the occupation of the second receiving cavity 13. The second receiving cavity 13 is used to house the battery cells. Reducing the occupation of the second receiving cavity 13 can improve the energy density of the battery module.

[0035] Optionally, in some cases, the vapor chamber 21 can be replaced with a liquid cooling plate.

[0036] Optionally, the heat spreader 21 is made of 6-series high-strength aluminum plate.

[0037] In one embodiment, the liquid cooling assembly 2 includes a thermally conductive adhesive layer, which is at least partially located between the heat spreader 21 and the water cooling pipe 22, and connects the heat spreader 21 and the water cooling pipe 22. In this embodiment, the heat spreader 21 and the water cooling pipe 22 are connected by the thermally conductive adhesive layer. Compared with the prior art where the upper plate is a flat heat spreader 21 and the lower plate is a stamped plate with flow channels, and the upper and lower plates need to be coated with brazing flux and then brazed in a brazing furnace, the water cooling pipe 22 and the heat spreader 21 are connected by adhesive, which can reduce production costs and improve assembly efficiency.

[0038] Optionally, in some cases, the water-cooled pipe 22 and the heat spreader 21 can also be connected by welding.

[0039] like Figure 3 and 4 As shown, in one embodiment, the water-cooling pipe 22 is a harmonica tube extending along a curved trajectory. On the one hand, the harmonica tube has a flat structure, which reduces the space occupied in the first receiving cavity 12. On the other hand, the flat structure of the harmonica tube can increase the contact area with the heat spreader 21 and improve stability. At the same time, choosing a harmonica tube can also reduce production costs.

[0040] like Figure 3 and 4As shown in Figures 7 and 8, and Figures 10 and 11, in one embodiment, the enclosure also includes an insulation layer 3. The insulation layer 3 is at least partially disposed between the temperature distribution plate 21 and the bottom protective plate 6. By providing the insulation layer 3, a bottom structure of the enclosure is formed with the dual functions of buffering and heat insulation. At the same time, the insulation layer 3 fills the first receiving cavity 12, which can also improve the sealing of the first receiving cavity 12, prevent the liquid cooling component 2 from contacting the external environment, and reduce the risk of corrosion of the liquid cooling component 2.

[0041] Optionally, the insulation layer 3 can be a foamed material, such as polyurethane, epoxy resin or polypropylene. These materials have low density, can significantly improve rigidity and energy absorption, and also have added value properties such as heat insulation, flame retardancy and electrical insulation.

[0042] Optionally, the foaming density of the foam material can range from 1.5 to 10 times the required strength. The foaming method can be to inject foaming adhesive into the first receiving cavity 12, foaming at room temperature or by heating, and then immediately cover it with the bottom protective plate 6. The bottom protective plate 6 is fixed in place around the perimeter with rivets or other fasteners, and the center of the bottom protective plate 6 is pressed down with tooling to prevent deformation. Once the foaming material has finished foaming online, the integrated bottom protective plate 6 and the box bottom plate with the compatible foam material buffering and insulation function of the liquid cooling component 2 are completed.

[0043] like Figure 4 , 8 As shown in Figure 11, in one embodiment, the cavity wall of the first receiving cavity 12 includes a first cavity side surface and a step surface 121, the second receiving cavity 13 includes a second cavity side surface, and the step surface 121 connects the first cavity side surface and the second cavity side surface; the heat distribution plate 21 is connected to the step surface 121, and the step surface 121 can provide stable support for the heat distribution plate 21, so that the heat distribution plate 21 can be connected to the frame 1.

[0044] Optionally, the side surface of the first cavity and the side surface of the second cavity extend along a first direction, and the stepped surface 121 extends along a horizontal direction.

[0045] Optionally, the frame 1 can be formed by extruding and welding multiple aluminum profiles, and the heat spreader 21 can be connected to the step surface 121 by friction stir welding.

[0046] like Figure 1 and 2As shown, in one embodiment, the heat spreader 21 includes a protrusion 211 located on one side of the frame 1, the protrusion 211 protruding from one side of the frame 1; the water cooling pipe 22 includes a first protruding section 221 and a second protruding section 222, the first protruding section 221 being used to connect to the liquid inlet pipe 4, and the second protruding section 222 being used to connect to the liquid outlet pipe 5. The first protruding section 221 and the second protruding section 222 also protrude from one side of the frame 1, and their protruding directions are the same as the protruding direction of the protrusion 211. By providing the protrusion 211, the first protruding section 221 and the second protruding section 222 are connected to the protrusion 211, improving the efficiency of the first protruding section 221 and the second protruding section 222. The stability between the protruding section 222 and the protruding part 211; at the same time, the protruding part 211 can support the inlet pipe 4 and the outlet pipe 5, so that the first protruding section 221 can be connected to the inlet pipe 4 and the second protruding section 222 can be connected to the outlet pipe 5; a notch (not shown in the figure) is provided on one side of the frame 1, and the protruding part 211, the first protruding section 221 and the second protruding section 222 all protrude from the notch position. By providing the notch, the protruding part 211, the first protruding section 221 and the second protruding section 222 can be avoided, so that the protruding part 211, the first protruding section 221 and the second protruding section 222 can protrude from one side of the frame 1.

[0047] Optionally, the protrusion 211, the first protrusion 221 and the second protrusion 222 can be coated with an anti-corrosion layer. Of course, foam material can also be filled at the gap.

[0048] like Figure 5 , 7 As shown in Figures 8, 10, and 11, in one embodiment, an inner cavity 11 is formed inside the frame 1. The box also includes a reinforcing member disposed in the inner cavity 11 of the frame 1, which can provide structural reinforcement for the frame 1. The reinforcing member includes a support portion 8 and a filling material. A cavity is formed inside the support portion 8, and the filling material is filled in the cavity. The density of the support portion 8 and the filling material is less than the density of the frame 1. Therefore, under the same volume, the weight of the support portion 8 and the filling material is less than the weight of the frame 1. This means that in the embodiment of this application, the inner cavity 11 of the frame 1 does not need to be provided with some ribs for support, but is replaced by the support portion 8 and the filling material. The support portion 8 can support the frame 1 in the inner cavity 11, thereby improving the overall structural strength of the frame 1. Under bending or axial load, it can effectively share the external force. At the same time, the filling material filled in the cavity of the support portion 8 can absorb impact energy and improve fatigue life, thereby enabling the frame 1 to be lightweight while taking into account structural strength.

[0049] Optionally, the frame 1 includes multiple side plates connected end to end to form a first receiving cavity 12 and a second receiving cavity 13. The reinforcing member extends along the length of each side plate, thereby supporting the inner cavity 11 of the multiple side plates and improving the structural strength.

[0050] Optionally, in the embodiments of this application, the frame 1 can be the frame 1 of a battery module, which includes multiple battery cells, or it can be the frame 1 of a battery pack, which includes multiple battery modules.

[0051] Optionally, the filler material can be polyurethane, epoxy resin or polypropylene. These materials have low density, can significantly increase rigidity and energy absorption, and have added value properties such as heat insulation, flame retardancy and electrical insulation.

[0052] Optionally, the foaming density of the filler material can range from 1.5 to 10 times the required strength. The foaming method can be to inject foam into the cavity or each receiving groove 10, and then foam at room temperature or by heating to form the foam.

[0053] like Figure 5 , 7 As shown in Figures 8, 10, and 11, in one embodiment, the cavity is provided with multiple spacer portions 9, which are connected to the support portion 8. The spacer portions 9 divide the cavity inside the support portion 8 into multiple receiving slots 10, which extend along the extending direction of the support portion 8. Filling material is filled into each receiving slot 10. The spacer portions 9 divide the cavity into multiple receiving slots 10, making the entire cavity present a honeycomb structure. The honeycomb structure can improve the structural strength and absorb energy, converting impact kinetic energy into plastic deformation energy. The spacer portions 9 and the support portion 8 are made of the same material, which improves the structural strength while satisfying the requirements of lightweighting. At the same time, each receiving slot 10 is filled with filling material, which can absorb impact energy and improve fatigue life.

[0054] Optionally, the spacer 9 and the support 8 are integrally formed, thereby improving the structural strength of the reinforcement.

[0055] In one implementation, both the support part 8 and the spacer part 9 are glass fiber reinforced composite components. The glass fiber reinforced composite component has a lower sealing performance than the aluminum profile in the same volume. It can achieve the purpose of lightweighting the frame 1 while meeting the structural strength requirements.

[0056] Optionally, the support portion 8 and the spacer portion 9 can be made of thermoplastic or thermosetting materials, reinforced with glass fiber, and the molding process can be pultrusion molding, in which glass fiber is continuously impregnated on resin and continuously pultruded through a pultrusion die. The thickness and internal shape can be designed as needed.

[0057] Secondly, embodiments of this application also provide a battery pack, including the housing provided in the first aspect.

[0058] The battery pack includes a housing and one or more individual battery cells housed within the housing.

[0059] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the housing by fixing the battery module in the housing.

[0060] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0061] Thirdly, embodiments of this application also provide an electrical device, which includes the battery pack provided in the second aspect.

[0062] Electrical devices can include, but are not limited to, electric motorcycles, electric cars, ships, spacecraft, etc.

[0063] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

[0064] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0065] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A box, characterized in that, include: A frame encloses a receiving space, the receiving space including a first receiving cavity and a second receiving cavity extending along a first direction. Along the first direction, the frame has a first end and a second end opposite to each other. The end of the first receiving cavity away from the second receiving cavity extends to the first end and forms a first opening. The end of the second receiving cavity away from the first receiving cavity extends to the second end. The cross-sectional area of ​​the first receiving cavity is larger than the cross-sectional area of ​​the second receiving cavity. The cross-section is perpendicular to the first direction. A liquid cooling assembly is at least partially housed within the first receiving cavity; A bottom protective plate is attached to the first end and covers the first opening.

2. The housing according to claim 1, characterized in that, The liquid cooling assembly includes a vapor chamber and a water-cooling pipe. At least a portion of the vapor chamber is housed in the first receiving cavity and covers one end of the second receiving cavity near the first receiving cavity. The water-cooling pipe is located between the vapor chamber and the bottom protective plate and is thermally connected to the vapor chamber.

3. The housing according to claim 2, characterized in that, The liquid cooling assembly includes a thermally conductive adhesive layer, which is at least partially located between the heat spreader and the water cooling pipe, and connects the heat spreader and the water cooling pipe.

4. The housing according to claim 2, characterized in that, The water-cooling pipe is a harmonica tube that extends along a curved trajectory.

5. The housing according to claim 2, characterized in that, The enclosure also includes an insulation layer, which is at least partially disposed between the temperature equalization plate and the bottom protective plate.

6. The housing according to claim 2, characterized in that, The cavity wall of the first receiving cavity includes a first cavity side surface and a stepped surface, and the second receiving cavity includes a second cavity side surface, wherein the stepped surface connects the first cavity side surface and the second cavity side surface; The temperature equalization plate is connected to the stepped surface.

7. The housing according to claim 2, characterized in that, The temperature distribution plate includes a protrusion located on one side of the frame, the protrusion protruding from one side of the frame; The water-cooling pipe includes a first protruding section and a second protruding section. The first protruding section is used to connect with the liquid inlet pipe, and the second protruding section is used to connect with the liquid outlet pipe. The first protruding section and the second protruding section also protrude from one side of the frame, and the protrusion direction is the same as the protrusion direction of the protruding part. A notch is provided on one side of the frame, and the protrusion, the first protruding segment, and the second protruding segment all protrude from the notch.

8. The housing according to any one of claims 1 to 7, characterized in that, An inner cavity is formed inside the frame; A reinforcing member is disposed in the inner cavity of the frame. The reinforcing member includes a support portion and a filling material. A cavity is formed inside the support portion, and the filling material fills the cavity. The density of the support portion and the filling material is less than the density of the frame.

9. The housing according to claim 8, characterized in that, The cavity is provided with multiple partitions, the partitions are made of the same material as the support and are connected to the support. The partitions divide the cavity into multiple receiving slots, the receiving slots extend along the extension direction of the support, and the filling material fills each receiving slot.

10. The housing according to claim 9, characterized in that, The support portion and the spacer portion are glass fiber reinforced composite components.

11. A battery pack, characterized in that, The battery pack includes the housing as described in any one of claims 1 to 10.

12. An electrical appliance, characterized in that, The electrical device includes the battery pack as described in claim 11.

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