Cooling plate, battery pack case, battery pack, and vehicle

Abstract

The present application provides a cooling plate, a battery pack case, a battery pack, and a vehicle. The cooling plate comprises a cooling plate body and a plurality of protrusions; the plurality of protrusions are spaced on one side of the cooling plate body in the thickness direction thereof; the protrusions are arranged on one side of the cooling plate body in the thickness direction thereof; each protrusion comprises a plurality of plates; the plurality of plates are connected and define a cavity; the plates can deform in the thickness direction of the cooling plate body; connecting parts adapted to be connected to a bottom protection plate are provided on a plate. The battery pack having the cooling plate according to some embodiments of the present application has the advantages of high use safety and the like.

Description

Cooling plate, battery pack case, battery pack and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on June 25, 2023, with application number 202321620386.7 and application name “Cooling Plate, Battery Pack Box, Battery Pack and Vehicle”, all contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of power battery technology, and in particular to a cooling plate, a battery pack case, a battery pack and a vehicle. Background Art

[0004] Currently, battery pack enclosures often integrate a base plate with a cooling plate to increase height integration, effectively using the base plate as the cooling plate. Furthermore, to prevent direct contact with the cooling plate when the vehicle bottoms out, an additional underbody guard is typically designed underneath to protect it.

[0005] In the prior art, the cooling plate is provided with connection holes, and the bottom guard is screwed into the connection holes with bolts to achieve the fixing of the bottom guard. However, when the vehicle bottoms out at the bolt fixing area of ​​the bottom guard, the external force on the bottom guard is directly transmitted to the cooling plate, causing deformation or even cracking of the cooling plate, affecting the safety of the battery pack.

[0006] Utility Model Content

[0007] This application aims to at least partially address one of the technical problems in the related art. To this end, some embodiments of this application provide a cooling plate with enhanced safety; some embodiments of this application also provide a battery pack case with enhanced safety; some embodiments of this application also provide a battery pack with enhanced safety; and some embodiments of this application also provide a vehicle with enhanced safety.

[0008] The cooling plate of some embodiments of the present application includes a cooling plate body and a plurality of protrusions, wherein the plurality of protrusions are spaced apart on one side of the thickness direction of the cooling plate body, the protrusions include a plurality of plate bodies, the plurality of plate bodies are connected and define a cavity, the plate bodies can be deformed along the thickness direction of the cooling plate body, and a connecting portion for connecting to the bottom guard plate is provided on the plate body.

[0009] In some embodiments, the protrusion is a long strip protrusion, the extension direction of the protrusion is perpendicular to the thickness direction of the cooling plate, and the cavity passes through both ends of the protrusion along the length direction of the protrusion.

[0010] In some embodiments, the multiple plates include a first plate, a second plate, and a third plate connected in sequence, the first plate and the third plate are both connected to the cooling plate body, the second plate and the cooling plate body are spaced apart along the thickness direction of the cooling plate body, a cavity is defined between the first plate, the second plate, and the third plate, and the connecting portion is provided on the second plate.

[0011] In some embodiments, the thickness of the first plate and / or the third plate is less than the thickness of the second plate.

[0012] In some embodiments, the thickness of each of the first plate and the third plate is 1.2 mm (millimetre) to 1.7 mm, and the thickness of the second plate is 1.8 mm to 2.5 mm.

[0013] In some embodiments, the width of the protrusion is 10 mm-15 mm.

[0014] In some embodiments, the plurality of protrusions are divided into a plurality of protrusion groups, the plurality of protrusion groups are spaced apart along the length direction of the cooling plate body, and each protrusion group includes a plurality of protrusions spaced apart along the width direction of the cooling plate body.

[0015] In some embodiments, the plurality of protrusions are arranged in a matrix.

[0016] The battery pack case of some embodiments of the present application includes a cooling plate and a bottom guard plate, and the cooling plate is the cooling plate in some of the above embodiments; the bottom guard plate is arranged on the side of the protrusion away from the cooling plate body, and the bottom guard plate has a fixing portion, which is connected to the connecting portion.

[0017] In some embodiments, the battery pack case of some embodiments of the present application further includes a first thermal insulation member, which is disposed between the protrusion and the bottom guard plate, and has a first avoidance hole for avoiding the connection portion.

[0018] In some embodiments, the battery pack case of some embodiments of the present application further includes a second thermal insulation member, which is disposed between the cooling plate body and the bottom guard plate, and has a second avoidance hole for the protrusion to pass through.

[0019] The battery pack of some embodiments of the present application includes the battery pack case of some of the above embodiments.

[0020] The battery pack in some of the above embodiments of the vehicle in some embodiments of the present application.

[0021] During use of the cooling plates of some embodiments of the present application, when the entire vehicle bottoms out, the supporting force exerted on the bottom guard plate will first be transmitted to the protrusions on the cooling plate. When the protrusions are subjected to a large supporting force, the plate body will deform in the thickness direction of the cooling plate body, so that the cavity on the protrusions can form a collapse space. The cooling plate can use its collapse space to collapse and absorb energy, so as to avoid the supporting force exerted on the bottom guard plate being directly transmitted to the cooling plate body, thereby greatly reducing or even avoiding the risk of deformation or even rupture of the cooling plate, and greatly improving the safety of the cooling plate.

[0022] Therefore, the battery pack according to some embodiments of the present application has advantages such as high safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic diagram of the partial structure of a battery pack case in some embodiments of the present application.

[0024] FIG2 is a schematic structural diagram of a cooling plate of a battery pack case in some embodiments of the present application.

[0025] FIG3 is a schematic structural diagram of the bottom guard plate of the battery pack case in some embodiments of the present application.

[0026] Figure 4 is a schematic structural diagram of the second thermal insulation component and the bottom guard plate of the battery pack case in some embodiments of the present application.

[0027] Figure 5 is a schematic assembly diagram of the first thermal insulation member and the second thermal insulation member of the battery pack case in some embodiments of the present application.

[0028] FIG6 is a schematic diagram showing the connection between the bottom guard plate and the cooling plate of the battery pack case in some embodiments of the present application.

[0029] FIG7 is a schematic diagram of the installation of the first thermal insulation component of the battery pack case in some embodiments of the present application.

[0030] Figure numerals: battery pack case 100; cooling plate 1; cooling plate body 101; protrusion 102; first plate 1021; second plate 1022; connecting portion 10221; third plate 1023; cavity 1024; bottom guard plate 2; fixing portion 201; bolt 3; first thermal insulation member 4; first avoidance hole 401; second thermal insulation member 5; second avoidance hole 501. DETAILED DESCRIPTION

[0031] Some embodiments of the present application are described in detail below, and examples of some embodiments are shown in the accompanying drawings. Some embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present application, but should not be understood as limiting the present application.

[0032] The technical solution of the present application is described in detail below with reference to the accompanying drawings.

[0033] As shown in Figures 1 to 7, the battery pack case 100 of some embodiments of the present application includes a cooling plate 1 and a bottom guard plate 2. In some embodiments of the present application, the cooling plate 1 includes a cooling plate body 101 and multiple protrusions 102. The multiple protrusions 102 are spaced apart on one side of the cooling plate body 101 in the thickness direction. The protrusions 102 include multiple plates, which are connected to define a cavity 1024. The plates can deform along the thickness direction of the cooling plate body 101. The plates are provided with a connecting portion 10221 for connecting to the bottom guard plate 2. The bottom guard plate 2 has a fixing portion 201, which is connected to the connecting portion 10221.

[0034] For example, the connecting portion 10221 may be a connecting hole, and the fixing portion 201 may be a through hole extending through the bottom guard plate 2 in the thickness direction thereof. The connecting portion 10221 and the fixing portion 201 may be connected by a bolt 3 and a rivet nut (as shown in FIG6 ). Of course, the connecting portion 10221 and the fixing portion 201 may also be connected by bonding or welding.

[0035] When the entire vehicle bottoms out, the external force exerted on the bottom guard plate 2 will first be transmitted to the protrusion 102 on the cooling plate 1. When the protrusion 102 is subjected to a large bottoming force, the plate body will deform in the thickness direction of the cooling plate body 101, so that the cavity 1024 on the protrusion 102 can form a collapse space. The cooling plate 1 can use its collapse space to collapse and absorb energy to avoid the bottoming force exerted on the bottom guard plate 2 being directly transmitted to the cooling plate body 101, thereby greatly reducing or even avoiding the risk of deformation or even rupture of the cooling plate 1, and greatly improving the safety of the cooling plate 1.

[0036] Therefore, the battery pack having the cooling plate 1 according to some embodiments of the present application has advantages such as high safety in use.

[0037] In some embodiments, the protrusion 102 is a long strip protrusion 102 , the extension direction of the protrusion 102 is perpendicular to the thickness direction of the cooling plate 1 , and the cavity 1024 passes through both ends of the protrusion 102 along the length direction of the protrusion 102 .

[0038] As shown in FIG2 , the cooling plate 1 of some embodiments of the present application increases the contact area between the protrusion 102 and the cooling plate body 101 by configuring the protrusion 102 in an elongated strip shape. When the protrusion 102 is subjected to a supporting force, the cooling plate body 101 is evenly stressed, preventing deformation or damage to the cooling plate body 101 due to stress concentration. Furthermore, by providing a cavity 1024 extending through both ends of the protrusion 102 along its length, the protrusion 102 can have a cavity 1024 as large as possible for collapse energy absorption, further improving the safety of the cooling plate 1 of some embodiments of the present application.

[0039] In some embodiments, multiple plates include a first plate 1021, a second plate 1022 and a third plate 1023 connected in sequence, the first plate 1021 and the third plate 1023 are both connected to the cooling plate body 101, the second plate 1022 and the cooling plate body 101 are spaced apart along the thickness direction of the cooling plate body 101, a cavity 1024 is defined between the first plate 1021, the second plate 1022 and the third plate 1023, and the connecting portion 10221 is provided on the second plate 1022.

[0040] For example, as shown in Figures 2, 6 and 7, the cooling plate 1 of some embodiments of the present application arranges the protrusion 102 into a first plate body 1021, a second plate body 1022 and a third plate body 1023 connected in sequence, so that the protrusion 102 can be made using a mature profile extrusion molding process, thereby making the structure of the protrusion 102 simple and easy to process and manufacture.

[0041] In some embodiments, the cooling plate body 101 and the protrusion 102 are integrally manufactured, which not only increases the structural strength of the cooling plate 1 , but also improves the manufacturing efficiency of the cooling plate 1 .

[0042] In some embodiments, the thickness of the first plate 1021 and / or the third plate 1023 is less than the thickness of the second plate 1022 , that is, the thickness of at least one of the first plate 1021 and the third plate 1023 is less than the thickness of the second plate 1022 .

[0043] For example, the thickness of the first plate body 1021 and the third plate body 1023 are both smaller than the thickness of the second plate body 1022. When the vehicle bottoms out at the fixed portion 201 of the bottom guard plate 2, since the thickness of the first plate body 1021 and the third plate body 1023 is smaller than the thickness of the second plate body 1022, the first plate body 1021 and the third plate body 1023 will first collapse and absorb energy, so that the protrusion 102 can fully utilize the cavity 1024 to collapse and absorb energy.

[0044] In some embodiments, the thickness of each of the first plate 1021 and the third plate 1023 is 1.2 mm to 1.7 mm, and the thickness of the second plate 1022 is 1.8 mm to 2.5 mm.

[0045] For example, the thickness of the first plate 1021 and the second plate 1022 is 1.5 mm, and the thickness of the second plate 1022 is 2.0 mm. By properly setting the thickness of the first plate 1021, the second plate 1022, and the third plate 1023, the protrusion 102 can withstand different collapse forces to match the bottoming forces experienced by vehicles of different sizes.

[0046] In some embodiments, the width of the protrusion 102 is 10 mm to 15 mm.

[0047] For example, the width of the protrusion 102 is 12 mm. It should be noted that the cooling plate body 101 has a cooling cavity for storing coolant, and a reinforcing rib corresponding to the position of the protrusion 102 is set in the cooling cavity to improve the supporting strength of the cooling plate body 101. By reasonably setting the width of the protrusion 102, while meeting the setting requirements of the connection portion 10221, the width of the protrusion 102 can be reduced as much as possible, thereby reducing the width of the reinforcing rib set in the cooling cavity and minimizing the weight of the cooling plate body 101.

[0048] In some embodiments, the multiple protrusions 102 are divided into multiple protrusion groups 102, and the multiple protrusion groups 102 are arranged at intervals along the length direction of the cooling plate body 101. Each protrusion group 102 includes multiple protrusions 102 arranged at intervals along the width direction of the cooling plate body 101, so that the multiple protrusions 102 are evenly distributed on the cooling plate body 101. When the vehicle bottoms out, the force uniformity of the cooling plate body 101 can be improved.

[0049] In some embodiments, the plurality of protrusions 102 are arranged in a matrix.

[0050] For example, as shown in Figure 2, the multiple protrusions 102 are arranged in two rows, with the two rows of protrusions 102 spaced apart along the length of the cooling plate body 101. Each row of protrusions 102 includes multiple protrusions 102 spaced apart along the width of the cooling plate body 101. Mounting holes for connecting to the frame of the battery pack case 100 are provided between the two rows of protrusions 102. By arranging the multiple protrusions 102 in a matrix, the cooling plate body 101 is evenly stressed when the vehicle is mopping the floor, effectively avoiding stress concentration and further improving the safety of the cooling plate 1 in some embodiments of the present application.

[0051] In some embodiments, the battery pack case 100 of some embodiments of the present application further includes a first thermal insulation member 4 , which is disposed between the protrusion 102 and the bottom guard plate 2 , and has a first avoidance hole 401 for avoiding the connection portion 10221 .

[0052] As shown in FIG. 5 and FIG. 6 , the first thermal insulation member 4 can be mounted on the protrusion 102 by bonding. The first thermal insulation member 4 can be used not only for heat insulation but also for improving the overall rigidity of the cooling plate 1 .

[0053] In some embodiments, the battery pack case 100 of some embodiments of the present application further includes a second thermal insulation member 5, which is disposed between the cooling plate body 101 and the bottom guard plate 2, and has a second avoidance hole 501 for the protrusion 102 to pass through.

[0054] For example, as shown in Figures 5 and 7, the second thermal insulation member 5 can be installed by bonding on the side of the cooling plate body 101 near the bottom guard plate 2 to insulate the cooling plate 1, thereby improving the operational reliability of the cooling plate 1. Furthermore, when the vehicle bottoms out, the protrusions 102 collapse and absorb energy, allowing the second thermal insulation member 5 to further reduce the impact on the cooling plate body 101 during the vehicle bottoming out, further improving the safety of the battery pack case 100 in some embodiments of the present application.

[0055] The battery pack of some embodiments of the present application includes the battery pack case 100 of any of the above embodiments, so the battery pack of some embodiments of the present application has advantages such as high safety in use.

[0056] The vehicles of some embodiments of the present application include the battery packs of some of the above embodiments, so the vehicles of some embodiments of the present application have advantages such as high safety in use.

[0057] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0058] Furthermore, 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0059] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0060] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0061] In this application, the terms "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with some embodiments or examples are included in at least some embodiments or examples of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials or characteristics described can be combined in some embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0062] Although some of the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present application.

Claims

1. A cooling plate, characterized in that: include: Cooling plate body; and A plurality of protrusions are arranged at intervals on one side of the thickness direction of the cooling plate body, the protrusions include a plurality of plate bodies, the plurality of plate bodies are connected and define a cavity, the plate bodies can be deformed along the thickness direction of the cooling plate body, and the plate bodies are provided with a connecting portion for connecting to a bottom guard plate.

2. The cooling plate according to claim 1, characterized in that The protrusion is a long strip protrusion, the extension direction of the protrusion is perpendicular to the thickness direction of the cooling plate, and the cavity passes through both ends of the protrusion along the length direction of the protrusion.

3. The cooling plate according to claim 2, characterized in that The multiple plate bodies include a first plate body, a second plate body and a third plate body which are connected in sequence, the first plate body and the third plate body are both connected to the cooling plate body, the second plate body and the cooling plate body are spaced apart along the thickness direction of the cooling plate body, the cavity is defined between the first plate body, the second plate body and the third plate body, and the connecting part is arranged on the second plate body.

4. The cooling plate according to claim 3, characterized in that The thickness of the first plate body and / or the third plate body is smaller than the thickness of the second plate body.

5. The cooling plate according to claim 4, characterized in that The thickness of each of the first plate and the third plate is 1.2 mm-1.7 mm, and the thickness of the second plate is 1.8 mm-2.5 mm.

6. The cooling plate according to claim 2, characterized in that The width of the protrusion is 10mm-15mm.

7. The cooling plate according to claim 1, characterized in that The plurality of protrusions are divided into a plurality of protrusion groups, the plurality of protrusion groups are arranged at intervals along the length direction of the cooling plate body, and each of the protrusion groups includes a plurality of protrusions arranged at intervals along the width direction of the cooling plate body.

8. The cooling plate according to claim 7, characterized in that The plurality of protrusions are arranged in a matrix form.

9. A battery pack box, characterized in that: include: A cooling plate, wherein the cooling plate is the cooling plate according to any one of claims 1 to 8; and A bottom guard plate is arranged on a side of the protrusion away from the cooling plate body, and the bottom guard plate has a fixing portion, and the fixing portion is connected to the connecting portion.

10. The battery pack case according to claim 9, characterized in that: It also includes a first heat insulating member, which is arranged between the protrusion and the bottom guard plate, and has a first avoidance hole for avoiding the connecting part.

11. The battery pack case according to claim 9, characterized in that: It also includes a second heat insulating member, which is arranged between the cooling plate body and the bottom guard plate, and has a second avoidance hole for the protrusion to pass through.

12. A battery pack, characterized in that: The battery pack comprises the battery pack case according to any one of claims 9 to 11.

13. A vehicle, characterized in that: The vehicle includes the battery pack of claim 12.

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