Lightweight integrated liquid cooling protection plate

Abstract

The utility model discloses a light integrated liquid cooling protection plate which comprises a light liquid cooling plate, a plastic core material and a protection panel, the light liquid cooling plate is formed by PPO plastic in an injection molding mode, a liquid inlet and a liquid outlet are formed in the light liquid cooling plate, a snakelike flow channel is formed in the light liquid cooling plate, the flow channel wall of the snakelike flow channel downwards protrudes out of the lower surface of the light liquid cooling plate, and the liquid inlet and the liquid outlet of the light liquid cooling plate are communicated with an inlet and an outlet of the snakelike flow channel respectively. The upper surface of the plastic core material is fixedly attached to the lower surface of the light liquid cooling plate, the upper surface of the plastic core material is provided with a groove matched with the protruding part of the flow channel wall, and the lower surface of the plastic core material is fixedly attached to the upper surface of the protection panel. According to the scheme, by adopting the light liquid cooling plate formed by PPO plastic injection molding, the overall weight of the integrated liquid cooling protection plate is reduced, so that the system energy density in a power battery system can be relatively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries for new energy vehicles, and in particular to a lightweight integrated liquid cooling protective plate. Background Art

[0002] In recent years, the new energy vehicle industry has developed rapidly. In the field of new energy vehicles, lithium-ion power batteries are mostly used to power vehicles. During the driving process of the car, the battery will generate a lot of heat and may be hit by foreign objects such as stones on the ground at any time. The current general solution is mainly to transfer heat to the battery through the contact between the lightweight liquid cooling plate and the battery surface, and then cover the outside of the lightweight liquid cooling plate with a layer of steel plate or aluminum plate as a protective plate for the battery. However, the steel plate is heavy and has poor rigidity, and the aluminum plate has poor puncture resistance, which can easily cause the protective plate to deform or be damaged. In addition, in the general solution, the lightweight liquid cooling plate and the steel plate are two independent parts, and it takes a lot of work hours to assemble the two separately on the battery. The patent application with publication number CN217280938U discloses an integrated liquid cooling protective plate, which improves the installation efficiency and the strength of the lightweight liquid cooling plate by hot pressing a protective panel under the lightweight liquid cooling plate. However, in this solution, the lightweight liquid cooling plate is a flow-type aluminum lightweight liquid cooling plate, which is heavy and reduces the system energy density in the power battery system. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a lightweight integrated liquid cooling protective plate, in which the lightweight liquid cooling plate is injection molded by PPO plastic, which is light in weight, easy to process and low in cost.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0005] A lightweight integrated liquid cooling protective plate, comprising a lightweight liquid cooling plate, a plastic core material and a protective panel; the lightweight liquid cooling plate is injection molded by PPO plastic, the lightweight liquid cooling plate is provided with a liquid inlet and a liquid outlet, the lightweight liquid cooling plate is provided with a serpentine flow channel, the flow channel wall of the serpentine flow channel protrudes downward from the lower surface of the lightweight liquid cooling plate, the liquid inlet and the liquid outlet of the lightweight liquid cooling plate are respectively connected with the inlet and the outlet of the serpentine flow channel, the upper surface of the plastic core material is fitted and fixed to the lower surface of the lightweight liquid cooling plate, the upper surface of the plastic core material is provided with a groove matching the protruding part of the flow channel wall, and the lower surface of the plastic core material is fitted and fixed to the upper surface of the protective panel. In this way, by adopting a lightweight liquid cooling plate injection molded by PPO plastic, the overall weight of the integrated liquid cooling protective plate is reduced, thereby being able to relatively improve the system energy density in the power battery system.

[0006] Preferably, a first adhesive layer is provided between the lightweight liquid cooling plate and the plastic core material, and a second adhesive layer is provided between the plastic core material and the protective panel. The first adhesive layer is thermosetting glue or hot melt adhesive film; the second adhesive layer is thermosetting glue or hot melt adhesive film.

[0007] Preferably, when the first adhesive layer is a hot melt adhesive film and the second adhesive layer is a hot melt adhesive film, the lightweight liquid cooling plate, the first adhesive layer, the plastic core material, the second adhesive layer and the protective panel are hot pressed and composited into one body.

[0008] Preferably, the protective panel is a single-layer panel, and the protective panel is made of thermoplastic glass fiber composite material, thermosetting glass fiber composite material, carbon fiber composite material, plastic, wood board or metal material.

[0009] Preferably, the protective panel is a composite panel, comprising a first surface layer, the first surface layer being made of thermoplastic glass fiber composite material, thermosetting glass fiber composite material, carbon fiber composite material, plastic, wood board or metal material; the protective panel also comprises a second surface layer, the second surface layer being arranged on the upper surface or lower surface of the first surface layer, the second surface layer being made of aluminum, copper, iron, stainless steel, zinc alloy or titanium alloy.

[0010] Preferably, a third adhesive layer is provided between the first surface layer and the second surface layer, and the third adhesive layer is thermosetting glue or hot melt adhesive film.

[0011] Preferably, the plastic core material is a PP honeycomb core board, a PVC honeycomb core board, a PU foam board, a PP foam board or a PS foam board.

[0012] Preferably, the upper surface and the lower surface of the plastic core material are respectively covered with a pre-covering layer.

[0013] Preferably, the pre-covering layer is PP coated non-woven fabric, glass fiber felt, basalt felt or plant fiber felt, so as to improve the strength of the plastic core material body and also increase the adhesion between the plastic core material and the lightweight liquid cooling plate and protective plate.

[0014] Preferably, the liquid inlet and the liquid outlet are respectively in a columnar shape and protrude upward from the upper surface of the lightweight liquid cooling plate.

[0015] Traditional metal lightweight liquid cold plates are usually made of aluminum, and the density of aluminum is 2.7g / cm 3 Compared with traditional metal lightweight liquid cold plates, the density of PPO plastic is 1.08g / cm 3Under the same volume, the weight of PPO plastic is only 1 / 3 of that of traditional aluminum lightweight liquid cooling plate. It is light in weight. Moreover, compared with traditional metal lightweight liquid cooling plate, lightweight liquid cooling plate made of PPO plastic also has the following advantages: 1. At high temperature, the performance of PPO plastic is maintained and the dimensional stability is good; 2. It has good water resistance, acid resistance and alkali resistance; 3. In the preparation process of PPO lightweight liquid cooling plate, PPO plastic is used for one-time injection molding, which is convenient for processing, does not require post-processing, and has high production efficiency. The aluminum lightweight liquid cooling plate has many molding steps and a long processing cycle; 4. PPO plastic itself has insulating properties, does not need to spray an insulating layer, and is environmentally friendly.

[0016] Due to the adoption of the above technical scheme, the utility model has the following beneficial effects: by adopting a lightweight liquid cooling plate formed by injection molding of PPO plastic, the overall weight of the integrated liquid cooling protection plate is reduced, thereby being able to relatively improve the system energy density in the power battery system, and, in addition, no welding is required during the entire production process of the lightweight integrated liquid cooling protection plate, so the production efficiency is high and the production cost is low. BRIEF DESCRIPTION OF THE DRAWINGS Description of the drawings:

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of the layered structure of Example 1 of the utility model;

[0020] Figure 3 It is a schematic diagram of the layered structure of Example 2 of the present utility model;

[0021] Figure 4 It is a schematic diagram of the layered structure of Example 3 of the present utility model.

[0022] Reference numerals:

[0023] 1. Lightweight liquid cooling plate; 12. First adhesive layer; 2. Plastic core material; 23. Second adhesive layer; 3. Protective panel; 31. First surface layer; 32. Second surface layer; 33. Third adhesive layer; 4. Liquid inlet; 5. Liquid outlet; 6. Serpentine flow channel. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" 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 invention 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 invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more, unless otherwise clearly defined.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] Embodiment 1:

[0029] like Figure 1 and Figure 2 A lightweight integrated liquid-cooling protective plate shown includes a lightweight liquid-cooling plate 1, a plastic core material 2 and a protective panel 3; the lightweight liquid-cooling plate 1 is injection-molded by PPO plastic, and a liquid inlet 4 and a liquid outlet 5 are provided on the lightweight liquid-cooling plate 1, a serpentine flow channel 6 is provided inside the lightweight liquid-cooling plate 1, and the flow channel wall of the serpentine flow channel 6 protrudes downward from the lower surface of the lightweight liquid-cooling plate 1, the liquid inlet 4 and the liquid outlet 5 of the lightweight liquid-cooling plate 1 are respectively connected to the inlet and outlet of the serpentine flow channel 6, the upper surface of the plastic core material 2 is fitted and fixed to the lower surface of the lightweight liquid-cooling plate 1, the upper surface of the plastic core material is provided with a groove matching the protruding portion of the flow channel wall, and the lower surface of the plastic core material 2 is fitted and fixed to the upper surface of the protective panel 3.

[0030] Unlike traditional metal lightweight liquid cooling plates, the utility model uses a lightweight liquid cooling plate made of injection-molded PPO plastic with lower density, which greatly reduces the overall weight of the integrated liquid cooling protective plate, thereby relatively improving the system energy density in the power battery system. In addition, the entire production process of the lightweight integrated liquid cooling protective plate does not require welding, has high production efficiency, and can be installed as a whole on the outside of the battery, thereby improving the installation efficiency of the battery system.

[0031] In the present invention, a first adhesive layer 12 is provided between the lightweight liquid cooling plate 1 and the plastic core material 2, and a second adhesive layer 23 is provided between the plastic core material 2 and the protective panel 3. In one embodiment, the first adhesive layer 12 is a thermosetting glue, and the second adhesive layer 23 is a thermosetting glue. In this way, during the production process, the groove on the upper surface of the plastic core material 2 needs to be processed and formed in advance according to the shape of the protruding part of the flow channel wall of the serpentine flow channel 6, which increases the production steps, and the production efficiency and overall fit are poor. In another embodiment, the first adhesive layer 12 is a hot melt adhesive film, the second adhesive layer 23 is a hot melt adhesive film, and the lightweight liquid cooling plate 1, the first adhesive layer 12, the plastic core material 2, the second adhesive layer 23 and the protective panel 3 are hot pressed and composited. In this way, the groove on the upper surface of the plastic core material 2 is directly pressurized downward during the hot pressing and composite process so that the protruding part of the flow channel wall of the serpentine flow channel 6 of the lightweight liquid cooling plate 1 is sunken into the plastic core material 3, thereby forming a groove on the upper surface of the plastic core material 3 that matches the protruding part of the flow channel wall of the serpentine flow channel 6. In this way, the pretreatment steps can be reduced during the processing process, and the matching degree between the groove on the plastic core material 3 and the protruding part of the flow channel wall of the serpentine flow channel 6 is higher, and the fit is better.

[0032] In the present invention, the plastic core material 2 is a PP honeycomb core board, a PVC honeycomb core board, a PU foam board, a PP foam board or a PS foam board, and the thickness of the plastic core material 2 is generally 2mm-15mm. In order to increase the strength of the plastic core material 2, the upper and lower surfaces of the plastic core material 2 are respectively covered with a pre-covering layer, which can be a PP coated non-woven fabric, or a glass fiber felt, a basalt felt or a plant fiber felt, thereby increasing the contact area between the plastic core material 2 and the lightweight liquid cooling plate 1 and the protective panel 3, and increasing the bonding force between the plastic core material 2 and the lightweight liquid cooling plate 1 and the protective panel 3.

[0033] like Figure 1 As shown, the liquid inlet 4 and the liquid outlet 5 are respectively in a columnar shape and protrude upward from the upper surface of the lightweight liquid cooling plate.

[0034] In this embodiment, the protective panel 3 is a single-layer board, and the protective panel 3 is made of thermoplastic glass fiber composite material, thermosetting glass fiber composite material, carbon fiber composite material, plastic, wood board or metal material. The thickness of the protective panel 3 is 0.2mm-4mm, and the strength of the lightweight integrated liquid cooling protective plate is improved by setting the protective panel 3. When the second adhesive layer 23 is a hot melt adhesive film, the second adhesive layer 23 is one of a low melting point modified PP film, a TPU hot melt adhesive film, a PA hot melt adhesive film, an EVA hot melt adhesive film and a PES hot melt adhesive film, and the thickness of the second adhesive layer 23 is 0.05mm-0.3mm.

[0035] Embodiment 2:

[0036] Different from the first embodiment, in the present embodiment, the protective panel 3 is a composite panel, and the protective panel 3 includes a first surface layer 31, and the first surface layer 31 is made of thermoplastic glass fiber composite material, thermosetting glass fiber composite material, carbon fiber composite material, plastic, wood board or metal material; the protective panel 3 also includes a second surface layer 32, and the second surface layer 32 is arranged on the upper surface of the first surface layer 31, and the second surface layer 32 is made of aluminum, copper, iron, stainless steel, zinc alloy or titanium alloy. By providing the second surface layer 32, the puncture resistance of the lightweight integrated liquid cooling protective panel is further increased, and the lightweight integrated liquid cooling protective panel is enhanced.

[0037] A third adhesive layer 33 is provided between the first surface layer 31 and the second surface layer 32, and the third adhesive layer 33 is a thermosetting glue or a hot melt adhesive film. The first surface layer 31 and the second surface layer 32 in the protective panel 3 can be fixed and bonded in advance, or can be bonded together with the lightweight liquid cooling plate 1 and the plastic core plate. Preferably, the third adhesive layer 33 is a hot melt adhesive film, and the lightweight liquid cooling plate 1, the first adhesive layer 12, the plastic core material 2, the second adhesive layer 23, the second surface layer 32, the third adhesive layer 33 and the first surface layer 31 are hot pressed and compositely formed into one.

[0038] In this embodiment, the second adhesive layer 23 is one of a low melting point modified PP film, a TPU hot melt adhesive film, a PA hot melt adhesive film, an EVA hot melt adhesive film and a PES hot melt adhesive film, and the thickness of the second adhesive layer 23 is 0.05mm-0.3mm; the third adhesive layer 33 is one of a low melting point modified PP film, a TPU hot melt adhesive film, a PA hot melt adhesive film, an EVA hot melt adhesive film and a PES hot melt adhesive film, and the thickness of the third adhesive layer 33 is 0.05mm-0.3mm.

[0039] Embodiment 3:

[0040] Different from the second embodiment, in this embodiment, the second surface layer 32 is arranged on the lower surface of the first surface layer 31 , and the rest is the same as the second embodiment.

[0041] All features described in the specification, the attached claims and the drawings, whether alone or in any combination thereof, are important features of the present utility model.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "an implementation", "specific implementation", "other implementations", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment, implementation or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described above may also be combined in any one or more embodiments, implementations or examples in a suitable manner. The technical solution recorded in the utility model also includes a technical solution formed by any one or more of the specific features, structures, materials or characteristics described above in a separate or combined manner.

[0043] Although the embodiments of the utility model have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model. Ordinary technicians in the field can change, modify, replace, modify, delete some features, add features or re-combine features to form a technical solution in the above embodiments without departing from the principles and purpose of the utility model within the scope of the utility model. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the innovative principles of the utility model are still within the scope of the technical solution of the utility model.

Claims

1. A lightweight integrated liquid cooling protective plate, characterized in that: The invention comprises a lightweight liquid cooling plate (1), a plastic core material (2) and a protective panel (3); the lightweight liquid cooling plate (1) is injection molded from PPO plastic, the lightweight liquid cooling plate (1) is provided with a liquid inlet (4) and a liquid outlet (5), the lightweight liquid cooling plate (1) is provided with a serpentine flow channel (6), the flow channel wall of the serpentine flow channel (6) protrudes downward from the lower surface of the lightweight liquid cooling plate (1), the liquid inlet (4) and the liquid outlet (5) of the lightweight liquid cooling plate (1) are respectively connected to the inlet and outlet of the serpentine flow channel (6), the upper surface of the plastic core material (2) is fixedly attached to the lower surface of the lightweight liquid cooling plate (1), and the upper surface of the plastic core material is provided with a serpentine flow channel (6) protruding downward from the lower surface of the lightweight liquid cooling plate (1). The protective panel (3) is a composite panel, comprising a first surface layer (31), the first surface layer (31) being made of a thermoplastic glass fiber composite material, a thermosetting glass fiber composite material, a carbon fiber composite material, plastic, a wood board or a metal material; the protective panel (3) further comprises a second surface layer (32), the second surface layer (32) being arranged on the upper surface or the lower surface of the first surface layer (31), the second surface layer (32) being made of aluminum, copper, iron, stainless steel, zinc alloy or titanium alloy.

2. A lightweight integrated liquid cooling protection plate according to claim 1, characterized in that: A first adhesive layer (12) is provided between the lightweight liquid cooling plate (1) and the plastic core material (2), and a second adhesive layer (23) is provided between the plastic core material (2) and the protective panel (3); the first adhesive layer (12) is a thermosetting glue or a hot melt adhesive film; and the second adhesive layer (23) is a thermosetting glue or a hot melt adhesive film.

3. A lightweight integrated liquid cooling protection plate according to claim 2, characterized in that: When the first adhesive layer (12) is a hot melt adhesive film and the second adhesive layer (23) is a hot melt adhesive film, the lightweight liquid cooling plate (1), the first adhesive layer (12), the plastic core material (2), the second adhesive layer (23) and the protective panel (3) are hot pressed and compositely formed into one body.

4. A lightweight integrated liquid cooling protection plate according to claim 1, characterized in that: A third adhesive layer (33) is provided between the first surface layer (31) and the second surface layer (32), and the third adhesive layer (33) is a thermosetting glue or a hot melt adhesive film.

5. A lightweight integrated liquid cooling protection plate according to any one of claims 1 to 4, characterized in that: The plastic core material (2) is a PP honeycomb core board, a PVC honeycomb core board, a PU foam board, a PP foam board or a PS foam board.

6. A lightweight integrated liquid cooling protection plate according to claim 5, characterized in that: The upper surface and the lower surface of the plastic core material (2) are respectively covered with a pre-covering layer.

7. A lightweight integrated liquid cooling protection plate according to claim 6, characterized in that: The pre-covering layer is PP coated non-woven fabric, glass fiber felt, basalt felt or plant fiber felt.

8. The lightweight integrated liquid cooling protection plate according to claim 1, characterized in that: The liquid inlet (4) and the liquid outlet (5) are respectively columnar and protrude upward from the upper surface of the lightweight liquid cooling plate.

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