Liquid-cooled integrated battery box, battery pack and electric equipment

Abstract

The utility model provides a kind of liquid cooling integrated battery box, battery pack and electric equipment, it is related to battery box technical field, comprising: box frame, integrated with liquid cooling bottom plate in box frame, bottom guard plate is installed in the bottom of box frame, heat insulating piece is equipped between liquid cooling bottom plate and bottom guard plate.Affirmative effect is to set up heat insulating piece in battery box, heat insulating piece is between bottom guard plate and box frame, the heat transfer effect of inside and outside battery box can be significantly reduced by the heat insulating piece, to solve the problem of low refrigeration efficiency and condensation under high temperature and high humidity environment.

Description

Technical Field

[0001] This utility model relates to the field of battery enclosure technology, and in particular to liquid-cooled integrated battery enclosure, battery pack and electrical equipment. Background Technology

[0002] The application of liquid-cooled integrated battery packs in mainstream automotive battery packs can significantly increase the energy density of the battery pack, reduce the number of internal components, simplify production processes, and improve battery capacity and driving range while reducing costs. The liquid-cooling plates in the integrated liquid-cooled pack are mainly composed of brazed stamped plates and extruded aluminum profiles, which are integrated with the pack frame via FDS (Friction Stir Welding) and friction stir welding, respectively, to form a battery pack housing with high-efficiency heat exchange capabilities.

[0003] In high-temperature and high-humidity environments, if there is no insulation in the liquid-cooled integrated battery box, the refrigerant inside the box can easily indirectly cool the air outside the box through the bottom of the box. This will reduce the cooling efficiency of the entire battery pack and cause condensation at the bottom of the box, affecting the normal use of the battery pack. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides a liquid-cooled integrated battery housing, comprising:

[0005] A box frame, the top of which is covered with a box cover, and the bottom of which is fitted with a bottom protective plate;

[0006] A liquid-cooled base plate is disposed between the box cover and the box frame. The bottom surface of the liquid-cooled base plate is extruded to form a bottom guard plate mounting beam, which is fixedly connected to the bottom guard plate.

[0007] A heat insulation component is disposed between the bottom protective plate and the housing frame.

[0008] Preferably, the box also includes a lid, which covers the top of the box frame. The top surface of the lid is provided with a reinforcing structure, which includes a plurality of reinforcing ridges, and adjacent reinforcing ridges are connected by connecting ridges.

[0009] Preferably, the outer wall of the box cover is provided with multiple support plates.

[0010] Preferably, the bottom protective plate is provided with multiple protruding ribs.

[0011] Preferably, the bottom surface of the liquid-cooled base plate is extruded to form a bottom guard plate mounting beam. The bottom guard plate mounting beam has multiple threaded holes on the side facing the bottom guard plate. The bottom guard plate has multiple mounting holes corresponding to the threaded holes. The bottom guard plate and the liquid-cooled base plate are fixedly connected through the threaded holes, the mounting holes, and screws.

[0012] Preferably, the device includes a plurality of heat insulation components, each of which is elongated and parallel to each other, and each of which is attached to the upper surface of the bottom protective plate. There is a gap between the heat insulation components and the mounting beam of the bottom protective plate, and the gap is not less than 3mm.

[0013] Preferably, the spacing is not less than 3mm.

[0014] Preferably, the liquid-cooled base plate has welded portions at both ends.

[0015] Preferably, the upper and lower surfaces of the box wall of the box frame are provided with a plurality of screw holes, the outer side wall of the box cover extends outward to form a mounting part, the mounting part is provided with a first mounting hole corresponding to each of the screw holes, and the edge of the bottom guard plate is provided with a second mounting hole corresponding to each of the screw holes.

[0016] This utility model also provides a battery pack, characterized in that it includes the liquid-cooled integrated battery housing as described above.

[0017] This utility model also provides an electrical device comprising the battery pack described above.

[0018] The above technical solution has the following advantages or beneficial effects: a heat insulation component is installed in the battery box, which is located between the bottom protective plate and the box frame. The added heat insulation component can significantly reduce the heat transfer effect inside and outside the battery box, thereby solving the problems of low cooling efficiency and condensation in high temperature and high humidity environments. Attached Figure Description

[0019] Figure 1 A schematic diagram of the structure of a liquid-cooled integrated battery box is shown in a preferred embodiment of this utility model.

[0020] Figure 2 This is a schematic diagram of the bottom protective plate in a preferred embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of the protruding ribs on the bottom protective plate in a preferred embodiment of the present invention.

[0022] Figure 4 A schematic diagram of the structure of the bottom surface of the liquid-cooled base plate and the mounting beam of the bottom protective plate in a preferred embodiment of this utility model;

[0023] Figure 5This is a schematic diagram of the cross-sectional structure of the liquid-cooled base plate in a preferred embodiment of the present invention.

[0024] Figure 6 This is a schematic diagram of the assembly of the bottom protective plate and the liquid-cooled bottom plate in a preferred embodiment of the present invention.

[0025] Figure 7 This is a schematic diagram showing the distance between the bottom protective plate and the liquid-cooled bottom plate in a preferred embodiment of the present invention. Detailed Implementation

[0026] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The present invention is not limited to this embodiment; other embodiments that conform to the spirit of the present invention may also fall within its scope.

[0027] In a preferred embodiment of this utility model, based on the above-mentioned problems existing in the prior art, a liquid-cooled integrated battery housing is provided, comprising:

[0028] The box frame 1 has an integrated liquid-cooled bottom plate 4 and a bottom protective plate 3 installed at the bottom of the box frame 1. A heat insulation component 6 is provided between the liquid-cooled bottom plate 4 and the bottom protective plate 3.

[0029] Specifically, in high-temperature and high-humidity environments, the liquid-cooled base plate 4 will lower the temperature of the entire battery box when it is working. In the absence of heat insulation measures in traditional technology, the heat transfer effect will cause the air outside the box to indirectly contact the inside of the box, thereby reducing the overall cooling efficiency. A more serious problem is that the air outside the battery box will condense when it comes into contact with the low-temperature bottom of the battery box, which will significantly affect the use of the battery pack.

[0030] Therefore, in this embodiment, as Figure 1 As shown, a heat insulation component 6 is installed in the battery box. The heat insulation component 6 is located between the bottom protective plate 3 and the box frame 1. More specifically, the heat insulation component 6 is made of heat insulation foam and is attached to the bottom protective plate 3. The added heat insulation component can significantly reduce the heat transfer effect inside and outside the battery box, thereby solving the problems of low cooling efficiency and condensation in high temperature and high humidity environments.

[0031] In a preferred embodiment of the present invention, a box cover 2 is also included, which covers the top of the box frame 1. The top surface of the box cover 2 is provided with a reinforcing structure 21, which includes a plurality of reinforcing protrusions 211, and adjacent reinforcing protrusions 211 are connected by connecting protrusions 212.

[0032] Specifically, a material's resistance to bending is directly related to the moment of inertia of its cross-section. The larger the moment of inertia, the more difficult it is for the material to bend under stress. For example... Figure 1As shown, multiple protruding reinforcing ribs 211 are provided on the top surface of the box cover. The protruding structure of the ribs significantly increases the moment of inertia of the box cover in the vertical direction by changing the cross-sectional shape (for example, forming a geometry similar to an I-beam), which can enhance the box cover's resistance to deformation.

[0033] In a preferred embodiment of the present invention, the liquid-cooled base plate 4 is integrated into the bottom of the housing frame 1, and the bottom surface of the liquid-cooled base plate 4 is extruded to form a bottom guard plate mounting beam 5, which is fixedly connected to the bottom guard plate 3.

[0034] Furthermore, in this embodiment, the bottom protective plate mounting beam 5 is provided with a plurality of threaded holes 51 on the side facing the bottom protective plate 3, and the bottom protective plate 3 is provided with a plurality of mounting holes 32 corresponding to the threaded holes 51. The bottom protective plate 3 and the liquid-cooled bottom plate 4 are fixedly connected by the threaded holes 51, the mounting holes 32 and the screws 100.

[0035] In this embodiment, welded portions 41 are formed at both ends of the liquid-cooled base plate 4.

[0036] Specifically, such as Figure 1 and Figure 4 As shown, welding portions 41 are formed at both ends of the liquid-cooled base plate 4. The welding portions 41 of the liquid-cooled base plate 4 are integrated with the bottom of the housing frame 1 by friction stir welding, forming a space in the housing frame 1 for accommodating the battery cells.

[0037] In a preferred embodiment of this utility model, the heat insulation component 6 is attached to the upper surface of the bottom protective plate 3, and there is a gap between the heat insulation component 6 and the bottom protective plate mounting beam 5, which is not less than 3mm.

[0038] Specifically, such as Figures 4-7 As shown, the bottom surface of the liquid-cooled base plate 4 has a bottom guard plate mounting beam 5. The bottom guard plate mounting beam 5 is extruded from aluminum together with the liquid-cooled base plate 4. Multiple threaded holes 51 are provided on the side of the bottom guard plate mounting beam 5 facing the bottom guard plate 3, so that the liquid-cooled base plate 4 has both heat exchange function and can be fixedly installed with the bottom guard plate 3 by screws 100, threaded holes 51, and mounting holes 32.

[0039] Since the bottom plate mounting beam 5 is extruded from the liquid-cooled base plate 4, while the bottom plate 3 and the bottom plate mounting beam 5 are fixed, there is still a certain gap between them. This ensures that the heat insulation component 6 attached to the bottom plate 3 has a certain gap with the liquid-cooled base plate 5, and needs to maintain a gap of at least 3mm with the liquid-cooled base plate 5. As a result, the heat transfer path of the refrigerant from the liquid-cooled base plate 4 to the external environment is changed from "liquid-cooled base plate → heat insulation foam → bottom plate → external environment" to "liquid-cooled base plate → air → heat insulation foam → bottom plate → external environment", thereby improving the heat insulation capability of the liquid-cooled integrated battery box.

[0040] Furthermore, such as Figure 1 As shown, each of the heat insulation components 6 is long and parallel to each other. This distribution can be uniform and increase the heat insulation area ratio, thereby improving the heat insulation effect.

[0041] In a preferred embodiment of the present invention, a box cover 2 is also included, which covers the top of the box frame 1, and a plurality of support plates 22 are provided on the outer side wall of the box cover 2.

[0042] Specifically, multiple support plates 22 are provided on the outer side wall of the box cover 2 to resist lateral deformation. The outer side wall is usually the weak point of the box cover 2. When the box cover 2 is subjected to external pressure (such as stacking heavy objects or impact), it is easy to dent due to lateral load (such as squeezing or falling impact during handling). The support plates 22 form a truss structure to transfer the force of the side wall to the support plates 22, which can disperse the local stress to a larger area of ​​the box body, avoid deformation or cracking caused by single point of force, and significantly improve the bending resistance.

[0043] In this embodiment, the support plate 22 is a triangular support plate. A triangle is the only planar shape with inherent geometric stability; its three sides form a rigid connection, preventing it from changing shape due to external forces (unless one side is damaged). This characteristic allows the triangular support plate to effectively resist lateral bending, torsion, or shear forces. Through its geometric stability, efficient load transfer capacity, and lightweight design, the triangular support plate provides multi-directional mechanical protection for the sidewalls of the box cover 2. This design not only enhances resistance to deformation but also balances material economy and structural reliability, representing a classic combination of engineering mechanics and industrial design.

[0044] In a preferred embodiment of this utility model, the bottom protective plate 3 is provided with multiple protruding ribs 31. Specifically, as shown... Figures 1-3 As shown, the bottom guard plate 3 is designed with several protruding ribs. By changing the cross-sectional shape (for example, forming a geometric shape similar to an I-beam), the moment of inertia of the bottom guard plate 3 in the vertical direction is significantly increased. The presence of the protruding ribs 31 can improve the overall stiffness of the bottom guard plate to a certain extent.

[0045] In a preferred embodiment of this utility model, the upper and lower surfaces of the box wall of the box frame 1 are provided with multiple screw holes, the outer side wall of the box cover 2 extends outward to form a mounting part 23, the mounting part 23 is provided with a first mounting hole corresponding to each screw hole, the edge of the bottom guard plate 3 is provided with a second mounting hole 33 corresponding to each screw hole, and the box cover 2 and the bottom guard plate 3 are integrated with the box frame 1 by means of screw fixing.

[0046] like Figure 1 As shown, multiple connectors 11 are also provided on the side of the box frame 1 for fixed connection with other components.

[0047] from Figure 5As can be seen from the cross-section of the liquid-cooled base plate 4, there are multiple liquid-cooled channels 42 filled with refrigerant to achieve liquid cooling.

[0048] This utility model also provides a battery pack, characterized in that it includes the liquid-cooled integrated battery housing as described above.

[0049] This utility model also provides an electrical device comprising the battery pack described above.

[0050] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made using the content of this specification and illustrations should be included within the protection scope of the present utility model.

Claims

1. A liquid-cooled integrated battery housing, characterized in that, include: The enclosure frame has an integrated liquid-cooled base plate, and a bottom protective plate is installed at the bottom of the enclosure frame. A heat insulation component is provided between the liquid-cooled base plate and the bottom protective plate.

2. The liquid-cooled integrated battery housing according to claim 1, characterized in that, It also includes a lid, which covers the top of the box frame. The top surface of the lid is provided with a reinforcing structure, which includes multiple reinforcing ridges. Adjacent reinforcing ridges are connected by connecting ridges.

3. The liquid-cooled integrated battery housing according to claim 2, characterized in that, The outer wall of the box cover is provided with multiple support plates.

4. The liquid-cooled integrated battery housing according to claim 1, characterized in that, The bottom protective plate is provided with multiple protruding ribs.

5. The liquid-cooled integrated battery housing according to claim 1, characterized in that, The bottom surface of the liquid-cooled base plate is extruded to form a bottom guard plate mounting beam. The bottom guard plate mounting beam has multiple threaded holes on the side facing the bottom guard plate. The bottom guard plate has multiple mounting holes corresponding to the threaded holes. The bottom guard plate and the liquid-cooled base plate are fixedly connected through the threaded holes, the mounting holes, and screws.

6. The liquid-cooled integrated battery housing according to claim 5, characterized in that, It includes multiple heat insulation components, each of which is long and parallel to each other. Each heat insulation component is attached to the upper surface of the bottom protective plate. There is a gap between the heat insulation component and the mounting beam of the bottom protective plate, and the gap is not less than 3mm.

7. The liquid-cooled integrated battery housing according to claim 1, characterized in that, The liquid-cooled base plate has welded sections at both ends.

8. The liquid-cooled integrated battery housing according to claim 2, characterized in that, The upper and lower surfaces of the box frame wall are provided with multiple screw holes. The outer side wall of the box cover extends outward to form a mounting part. The mounting part is provided with a first mounting hole corresponding to each of the screw holes. The edge of the bottom guard plate is provided with a second mounting hole corresponding to each of the screw holes.

9. A battery pack, characterized in that, It includes the liquid-cooled integrated battery housing as described in any one of claims 1-8.

10. An electrical appliance, characterized in that, It includes the battery pack as described in claim 9.

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