Large aluminum-plastic liquid cooling plate for battery pack and preparation method thereof

Abstract

The invention discloses a large-scale aluminum-plastic liquid cooling plate for a battery pack and a preparation method thereof.The large-scale aluminum-plastic liquid cooling plate for the battery pack comprises a plastic runner plate and an aluminum alloy thin plate, one surface of the plastic runner plate is provided with a first combination surface, and one surface of the aluminum alloy thin plate is provided with a second combination surface; a plurality of runners are arranged on the first combination face of the plastic runner plate at intervals through runner partition ribs, a liquid inlet is formed in one end of each runner in a converging mode, a liquid outlet is formed in the other end of each runner in a converging mode, and the runner partition ribs close to the liquid inlets are provided with drainage parts used for distributing inflow liquid. The plastic runner plate and the aluminum alloy thin plate are combined through the first combination face and the second combination face. The preparation method comprises the steps that the aluminum alloy thin plate and the plastic runner plate are prefabricated; the first combination surface of the plastic runner plate and the second combination surface of the aluminum alloy thin plate are combined to form an aluminum-plastic liquid cooling plate; anchoring is carried out on the other surface of the aluminum alloy thin plate along a runner partition rib self-tapping screw of the plastic runner plate; and testing the air tightness of the aluminum-plastic liquid cooling plate and the like.

Description

Technical Field

[0001] The invention relates to the field of liquid cooling devices, and in particular to a large aluminum-plastic liquid cooling plate for a battery pack and a preparation method thereof. Background Art

[0002] At present, the structural material commonly used in liquid cooling plates used in new energy electric vehicles and energy storage equipment is aluminum alloy. Although aluminum alloy liquid cooling plates have good corrosion resistance in the service environment, there are problems such as the limitation of aluminum alloy types and unstable welding of aluminum alloys in the manufacturing process. Aluminum-plastic liquid cooling plates can be used as one of the product development directions with complementary advantages. However, there are many difficulties in the manufacture of aluminum-plastic liquid cooling plates: the plastics used in aluminum-plastic liquid cooling plates are mostly thermoplastic engineering plastics, such as PPS, PBT and PAA, and are glass fiber reinforced composite plastics, which will lead to the deformation of engineering plastics in thermal processing. It is difficult to control and the problem of the combination of heterogeneous interfaces during the hot and cold alternating cycle service process. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide a large aluminum-plastic liquid cooling plate for a battery pack and a preparation method thereof, which not only has a simple structure but also can effectively solve the problems of deformation and leakage during the combination of aluminum alloy thin plates and plastic runner plates.

[0004] The present invention discloses a large aluminum-plastic liquid cooling plate for a battery pack, comprising: a plastic flow channel plate and an aluminum alloy thin plate, wherein one surface of the plastic flow channel plate is provided with a first bonding surface, and one surface of the aluminum alloy thin plate is provided with a second bonding surface, the first bonding surface of the plastic flow channel plate is provided with a plurality of flow channels spaced apart by flow channel partition ribs, one end of the plurality of flow channels converge to provide a liquid inlet, and the other end of the plurality of flow channels converge to provide a liquid outlet, the flow channel partition ribs near the liquid inlet are provided with a drainage portion for distributing the incoming liquid, and the plastic flow channel plate and the aluminum alloy thin plate are combined through the first bonding surface and the second bonding surface.

[0005] Furthermore, the first bonding surface and the second bonding surface are fixedly connected by bonding.

[0006] Furthermore, the plastic flow channel plate is integrally formed on the second joining surface of the aluminum alloy sheet.

[0007] Furthermore, the other surface of the aluminum alloy sheet is anchored to the flow channel partition ribs of the plastic flow channel plate by self-tapping screws for reinforcement.

[0008] Furthermore, the liquid inlet is installed with a liquid inlet pipeline, and the liquid outlet is installed with a liquid outlet pipeline.

[0009] The present invention discloses a method for preparing a large aluminum-plastic liquid cooling plate for a battery pack, which is used to prepare the above-mentioned aluminum-plastic liquid cooling plate, and comprises the following steps: S1, prefabricating the aluminum alloy sheet and the plastic flow channel plate; S2, combining the first bonding surface of the plastic flow channel plate with the second bonding surface of the aluminum alloy sheet to form an aluminum-plastic liquid cooling plate; S3, anchoring the flow channel partition ribs of the plastic flow channel plate along the other surface of the aluminum alloy sheet with self-tapping screws; S4, air tightness test of aluminum-plastic liquid cooling plate, etc.

[0010] Furthermore, in step S1, the first bonding surface of the prefabricated plastic flow channel plate is subjected to plasma surface hydrophilic treatment.

[0011] Furthermore, in step S2, the plastic flow channel plate is integrally formed on the second bonding surface of the aluminum alloy sheet.

[0012] Furthermore, in step S2, the second bonding surface of the aluminum alloy sheet is subjected to mask nano-processing.

[0013] Furthermore, in step S2, after the second bonding surface of the aluminum alloy sheet is subjected to mask nano-treatment, a plastic film is hot-pressed on the mask nano-treated side of the aluminum alloy sheet.

[0014] The large aluminum-plastic liquid cooling plate for battery packs provided by the present invention not only has a simple structure, but also can effectively solve the problem of deformation of the aluminum alloy thin plate and the plastic runner plate during the combination process. The preparation method of the large aluminum-plastic liquid cooling plate for battery packs provided by the present invention performs the processing of the aluminum alloy thin plate and the plastic runner plate in steps, and then combines processes such as bonding and anchoring to reduce the deformation of the plastic runner plate during the hot processing combined with the aluminum alloy thin plate, fundamentally solving the problem of deformation and leakage of the plastic runner plate during the combination of the heterogeneous interface of the aluminum alloy thin plate and the plastic runner plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 This is a three-dimensional diagram of a large aluminum-plastic liquid cooling plate for a battery pack of the present invention.

[0017] Figure 2 for Figure 1 Schematic diagram of the large aluminum-plastic liquid cooling plate for the battery pack shown.

[0018] Figure 3 Schematic diagram of the plastic flow channel plate of the present invention.

[0019] Figure 4 Schematic diagram of the aluminum alloy sheet of the present invention.

[0020] Figure 5 The present invention is a flow chart of the preparation method of the large aluminum-plastic liquid cooling plate for the battery pack.

[0021] Figure 6 The present invention is a flowchart of a method for preparing a large aluminum-plastic liquid cooling plate for a battery pack according to the first embodiment of the present invention.

[0022] Figure 7 The present invention is a flow chart of a method for preparing a large aluminum-plastic liquid cooling plate for a battery pack according to a second embodiment of the present invention.

[0023] Figure 8 The present invention is a flow chart of a method for preparing a large aluminum-plastic liquid cooling plate for a battery pack according to a third embodiment of the present invention. DETAILED DESCRIPTION

[0024] The specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the description of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The orientation or position relationship indicated by the terms "upper" and "lower" is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of description and simplified description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0026] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of the elements listed and may also include additional elements not expressly listed.

[0027] See also Figure 1-Figure 4The present invention discloses a large aluminum-plastic liquid cooling plate for a battery pack, which is applied to an automobile and performs heat exchange and cooling treatment on the heat generated by the battery pack of the automobile, comprising: a plastic flow channel plate 20 and an aluminum alloy sheet 10, wherein one surface of the plastic flow channel plate 20 is provided with a first bonding surface 21, and one surface of the aluminum alloy sheet 10 is provided with a second bonding surface 11, and the first bonding surface 21 of the plastic flow channel plate 20 is provided with a plurality of flow channels 23 spaced apart by flow channel partition ribs 22, and one end of the plurality of flow channels 23 converges to provide a liquid inlet 231, and the other end of the plurality of flow channels 23 converges to provide a liquid outlet 232, and the flow channel partition rib 22 near the liquid inlet 231 is provided with a drainage portion 221 for distributing the inflowing liquid, and the plastic flow channel plate 20 and the aluminum alloy sheet 10 are combined and sealed through the first bonding surface 21 and the second bonding surface 11.

[0028] In the present invention, the plastic flow channel plate 20 is made of engineering plastics, which are a type of polymer material with excellent comprehensive performance and can be used to manufacture structural parts working under harsh conditions. The main characteristics of engineering plastics are: light weight and low relative density, so they can replace some traditional metal materials for use in aviation, vehicles and other fields; they also have high specific strength, and the ratio of tensile strength to relative density of engineering plastics is very high; they are chemically stable and have good corrosion resistance to acids, alkalis and general organic solvents; and engineering plastics also have good processing properties, and engineering plastics can be processed into products of different shapes and sizes through injection molding, extrusion and other processes.

[0029] More specifically, in this embodiment, the first joint surface 21 of the plastic flow channel plate 20 and the second joint surface 11 of the aluminum alloy sheet 10 are fixedly connected by gluing to form an aluminum-plastic liquid cooling plate.

[0030] In other embodiments, the plastic flow channel plate 20 may also be formed by integrally molding and injection molding on the second joint surface 11 of the aluminum alloy sheet 10 to form an aluminum-plastic liquid cooling plate.

[0031] In order to increase the connection strength between the plastic flow channel plate 20 and the aluminum alloy sheet 10, the other surface of the aluminum alloy sheet 10 is reinforced by passing self-tapping screws 50 through the aluminum alloy sheet 10 and anchoring it on the flow channel ribs 22 of the plastic flow channel plate 20.

[0032] See also Figure 2 and Figure 3 The liquid inlet 231 is provided with a liquid inlet pipeline 30 , the liquid outlet 232 is provided with a liquid outlet pipeline 40 , and the connection between the liquid inlet pipeline 30 and the liquid inlet 231 and the connection between the liquid outlet pipeline 40 and the liquid outlet 232 are sealed.

[0033] When the large aluminum-plastic liquid cold plate of the battery pack of the present invention is used, the coolant is injected into the liquid inlet 231 through the liquid inlet pipeline 30. The coolant disperses the inflowing coolant under the action of the drainage portion 221 of the flow channel partition rib 22 and enters the plurality of flow channels 23. Then the coolant flows along the flow channels 23 in the plastic flow channel plate 20 and finally converges to the liquid outlet 232, and then flows out through the liquid outlet pipeline 40. In this embodiment, the battery pack of the vehicle is installed on a side close to the aluminum alloy sheet 10. The coolant flowing along the flow channel 23 passes through the aluminum alloy sheet 10 to take away the heat generated by the battery pack, and cools the battery pack to avoid accidents such as fire caused by excessive temperature.

[0034] See also Figure 5-Figure 8 The present invention also discloses a method for preparing a large aluminum-plastic liquid cooling plate for a battery pack, which is used to prepare the above-mentioned aluminum-plastic liquid cooling plate device, comprising the following steps: S1, prefabricating the aluminum alloy sheet 10 and the plastic flow channel plate 20; S2, combining the first bonding surface 21 of the plastic flow channel plate 20 with the second bonding surface 11 of the aluminum alloy sheet 10 to form an aluminum-plastic liquid cooling plate; S3, on the other surface of the aluminum alloy sheet 10, along the flow channel ribs 22 of the plastic flow channel plate 20, the self-tapping screws 50 penetrate the aluminum alloy sheet 10 and tap into the flow channel ribs 22 for anchoring; S4, air tightness test of aluminum-plastic liquid cooling plate, etc.

[0035] See also Figure 6 In more detail, the method for preparing the large aluminum-plastic liquid cooling plate for the battery pack of the first embodiment comprises the following steps: S1, prefabricating the aluminum alloy sheet 10; S2, performing mask nano-processing on the second bonding surface 11 of the aluminum alloy sheet 10, wherein the mask nano-processing is specifically as follows: firstly, performing nano-etching opening processing on the second bonding surface 11 of the aluminum alloy sheet 10, and then performing ultrasonic dip coupling agent filling processing on the opening processing; S3, injection molding the plastic flow channel plate 20 on the masked nano-processed side of the aluminum alloy sheet 10 to form an aluminum-plastic liquid cooling plate; S4, on the other surface of the aluminum alloy sheet 10, along the flow channel ribs 22 of the plastic flow channel plate 20, the self-tapping screws 50 penetrate the aluminum alloy sheet 10 and tap into the flow channel ribs 22 for anchoring; S5, air tightness test of aluminum-plastic liquid cooling plate, etc.

[0036] See also Figure 7In more detail, the method for preparing the large aluminum-plastic liquid cooling plate for the battery pack of the second embodiment comprises the following steps: S1, prefabricating the plastic runner plate 20 and the aluminum alloy sheet 10 by injection molding or hot pressing; S2, performing plasma surface hydrophilic treatment on the first bonding surface 21 of the plastic flow channel plate 20, and performing mask nano-treatment on the second bonding surface 11 of the aluminum alloy thin plate 10, wherein the mask nano-treatment is specifically: firstly performing nano-etching opening treatment on the second bonding surface 11 of the aluminum alloy thin plate 10, and then filling the opening treatment with an ultrasonic dip coupling agent; S3, bonding and curing the second bonding surface 11 of the aluminum alloy sheet 10 processed in step S2 and the first bonding surface 21 of the plastic flow channel plate 20 to form an aluminum-plastic liquid cooling plate; S4, on the other surface of the aluminum alloy sheet 10, along the flow channel ribs 22 of the plastic flow channel plate 20, the self-tapping screws 50 penetrate the aluminum alloy sheet 10 and tap into the flow channel ribs 22 for anchoring; S5, air tightness test of aluminum-plastic liquid cooling plate, etc.

[0037] See also Figure 8 In more detail, the method for preparing the large aluminum-plastic liquid cooling plate for the battery pack of the third embodiment comprises the following steps: S1, prefabricating the plastic runner plate 20 and the aluminum alloy sheet 10 by injection molding or hot pressing; S2, performing plasma surface hydrophilic treatment on the first bonding surface 21 of the plastic flow channel plate 20, and performing mask nano-treatment on the second bonding surface 11 of the aluminum alloy thin plate 10, wherein the mask nano-treatment is specifically: firstly performing nano-etching opening treatment on the second bonding surface 11 of the aluminum alloy thin plate 10, and then filling the opening treatment with an ultrasonic dip coupling agent; S3, hot pressing a plastic film onto the nano-treated side of the aluminum alloy sheet 10 processed in step S2; S4, bonding and curing the second bonding surface 11 of the aluminum alloy sheet 10 processed in step S3 and the first bonding surface 21 of the plastic flow channel plate 20 processed in step S2 to form an aluminum-plastic liquid cooling plate; S5, on the other surface of the aluminum alloy sheet 10, along the flow channel ribs 22 of the plastic flow channel plate 20, the self-tapping screws 50 penetrate the aluminum alloy sheet 10 and tap into the flow channel ribs 22 for anchoring; S6, air tightness test of aluminum-plastic liquid cooling plate, etc.

[0038] The aluminum-plastic liquid cooling plate that has passed the above-mentioned air tightness test is determined to be a qualified product and can be put into the next production process or used in the battery pack.

[0039] The present invention performs mask nano-processing on the second bonding surface 11 of the aluminum alloy sheet 10, and then attaches a plastic film of the same material as the plastic flow channel plate 20, and bonds it to the plastic flow channel plate 20 to ensure that the bonding of the same materials is better and the structure is more stable. In addition, the first bonding surface 21 of the plastic flow channel plate 20 is subjected to plasma surface hydrophilic treatment before bonding to further improve the bonding effect and ensure better air tightness of the bonding part. Then, the aluminum alloy sheet 10 and the plastic flow channel plate 20 are anchored by the self-tapping screws 50 to further stabilize the combination of the aluminum alloy sheet 10 and the plastic flow channel plate 20, so that the large aluminum-plastic liquid cooling plate for the battery pack is more stable in the structure that bears the battery pack, and the coolant in the tortuous flow channel 23 set in the large aluminum-plastic liquid cooling plate for the battery pack can quickly cool down the high temperature generated on the surface of the battery pack.

[0040] The large aluminum-plastic liquid cooling plate for battery packs provided by the present invention not only has a simple structure, but also can effectively solve the problem of deformation of the aluminum alloy sheet 10 and the plastic runner plate 20 during the combination process. The preparation method of the large aluminum-plastic liquid cooling plate for battery packs provided by the present invention performs the processing of the aluminum alloy sheet 10 and the plastic runner plate 20 in steps, and then combines processes such as bonding and anchoring to reduce the deformation of the plastic runner plate 20 during the hot processing combined with the aluminum alloy sheet 10, fundamentally solving the problem of deformation of the plastic runner plate 20 during the combination of the heterogeneous interface of the aluminum alloy sheet 10 and the plastic runner plate 20, improving the structural stability of the large aluminum-plastic liquid cooling plate for battery packs, and can also greatly save production costs through the combination of multiple production processes.

[0041] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A large aluminum-plastic liquid cooling plate for a battery pack, characterized in that: include: A plastic flow channel plate and an aluminum alloy sheet, wherein one surface of the plastic flow channel plate is provided with a first bonding surface, and one surface of the aluminum alloy sheet is provided with a second bonding surface, the first bonding surface of the plastic flow channel plate is provided with a plurality of flow channels spaced apart by flow channel partition ribs, a liquid inlet is provided at one end of the plurality of flow channels, a liquid outlet is provided at the other end of the plurality of flow channels, the flow channel partition ribs near the liquid inlet are provided with a drainage portion for distributing the incoming liquid, and the plastic flow channel plate and the aluminum alloy sheet are combined through the first bonding surface and the second bonding surface.

2. The large aluminum-plastic liquid cooling plate for battery pack according to claim 1, characterized in that: The first bonding surface and the second bonding surface are fixedly connected by bonding.

3. The large aluminum-plastic liquid cooling plate for battery pack according to claim 1, characterized in that: The plastic flow channel plate is integrally formed on the second joining surface of the aluminum alloy sheet.

4. The large aluminum-plastic liquid cooling plate for battery pack according to claim 1, characterized in that: The other surface of the aluminum alloy sheet is anchored to the flow channel partition ribs of the plastic flow channel plate by self-tapping screws for reinforcement.

5. The large aluminum-plastic liquid cooling plate for battery pack according to claim 1, characterized in that: The liquid inlet is equipped with a liquid inlet pipeline, and the liquid outlet is equipped with a liquid outlet pipeline.

6. A method for preparing a large aluminum-plastic liquid cooling plate for a battery pack, used to prepare the large aluminum-plastic liquid cooling plate for a battery pack as claimed in claim 1, characterized in that: The following steps are involved: S1, prefabricating the aluminum alloy sheet and the plastic flow channel plate; S2, combining the first bonding surface of the plastic flow channel plate with the second bonding surface of the aluminum alloy sheet to form an aluminum-plastic liquid cooling plate; S3, anchoring the flow channel partition ribs of the plastic flow channel plate along the other surface of the aluminum alloy sheet with self-tapping screws; S4. Aluminum-plastic liquid cooling plate air tightness test.

7. The method for preparing the aluminum-plastic liquid cooling plate according to claim 6, characterized in that: In step S1, the first bonding surface of the prefabricated plastic flow channel plate is subjected to plasma surface hydrophilic treatment.

8. The method for preparing the aluminum-plastic liquid cooling plate according to claim 6, characterized in that: In step S2, the plastic flow channel plate is integrally formed on the second bonding surface of the aluminum alloy sheet.

9. The method for preparing the aluminum-plastic liquid cooling plate according to claim 6, characterized in that: In step S2, the second bonding surface of the aluminum alloy sheet is subjected to mask nano-processing.

10. The method for preparing the aluminum-plastic liquid cooling plate according to claim 9, characterized in that: In step S2, after the second bonding surface of the aluminum alloy sheet is subjected to mask nano-treatment, a plastic film is hot-pressed on the mask nano-treated side of the aluminum alloy sheet.

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