Liquid cooling plate structure, battery pack and vehicle

Abstract

The embodiment of the utility model provides a liquid cooling plate structure, a battery pack and a vehicle, the liquid cooling plate structure comprises a runner plate body, the surface of the runner plate body is provided with an easy-to-corrode layer; and the corrosion resistance of the runner plate body is superior to that of the easy-to-corrode layer. Therefore, when impurities such as water, silt, metal particles and the like are deposited on the runner plate body under the conditions that a vehicle wades or is washed and the like, the corrosion resistance of the runner plate body is better than that of the easily-corroded layer, so that the easily-corroded layer is more easily subjected to electrochemical reaction to be corroded, and the service life of the runner plate is prolonged. Therefore, the risk that the runner plate body is corroded due to an electrochemical reaction is reduced, the runner plate body can keep relatively good structural performance, the liquid cooling plate structure has a relatively good cooling effect, and the influence on the cooling function of the liquid cooling plate structure is avoided.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a liquid cooling plate structure, a battery pack and a vehicle. Background Art

[0002] The liquid cooling plate structure can be used in the battery pack of the vehicle to cool down the heat generated by the battery pack, which plays a relatively important role.

[0003] In the prior art, the liquid cooling plate includes a flow channel plate, which is provided with a plurality of alternately arranged protrusions and recesses to form a plurality of flow channels. However, when the vehicle is wading or washing the car, the recesses of the flow channel plate are prone to deposit impurities such as water, silt, and metal particles. As time accumulates, the impurities such as water, silt, and metal particles are prone to corrode the flow channel plate, damaging its structure, resulting in a relatively serious impact on the cooling function of the liquid cooling plate. Utility Model Content

[0004] In view of the above problems, the present utility model is proposed to provide a liquid cooling plate structure, a battery pack and a vehicle that overcome the above problems or at least partially solve the above problems.

[0005] In order to solve the above technical problems, this application is implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a liquid cooling plate structure, the liquid cooling plate structure comprising: a flow channel plate body, a surface of the flow channel plate body being provided with a corrosion-prone layer;

[0007] The corrosion resistance of the flow channel plate body is better than that of the easily corroded layer.

[0008] Optionally, the easily corroded layer is a sacrificial anode layer, and the reducing property of the sacrificial anode layer is greater than the reducing property of the flow channel plate body.

[0009] Optionally, the flow channel plate body includes a flow channel area and a plane area connected to the flow channel area, and the corrosion-prone layer is connected to the plane area.

[0010] Optionally, the number of the plane areas includes a plurality, and the plurality of plane areas are arranged at intervals on the flow channel plate body;

[0011] The number of the corrosion-prone layers includes a plurality, and the plurality of corrosion-prone layers are respectively connected to a plurality of the plane areas, and one corrosion-prone layer is correspondingly connected to one plane area.

[0012] Optionally, the liquid cooling plate structure further includes a welding layer, wherein the welding layer is connected between the easily corroded layer and the flow channel plate body so as to weld the easily corroded layer to the flow channel plate body.

[0013] Optionally, the thickness of the welding layer is any value between 0.02 and 0.15 mm.

[0014] Optionally, the amount of the welding layer is 1.5-30g.

[0015] Optionally, the welding layer is a brazing layer.

[0016] Optionally, the brazing layer is made of potassium fluoroaluminate.

[0017] Optionally, the thickness of the corrosion-prone layer is any value between 0.2 and 2 mm.

[0018] Optionally, the ratio of the area S1 of the corrosion-prone layer to the area S2 of the flow channel plate body is: 0.5%≤S1:S2≤20%.

[0019] Optionally, the material of the corrosion-prone layer is zinc alloy, and the material of the flow channel plate body is aluminum alloy.

[0020] Optionally, the shape of the corrosion-prone layer includes at least one of a rectangle, a triangle, a trapezoid or a circle.

[0021] In a second aspect, an embodiment of the present application proposes a battery pack, which includes the liquid cooling plate structure.

[0022] Optionally, the battery pack further includes thermal insulation cotton, which is connected to the flow channel plate body of the liquid cooling plate structure, and there is a gap between the flow channel plate body and the thermal insulation cotton.

[0023] In a third aspect, an embodiment of the present application proposes a vehicle, which includes the battery pack.

[0024] In the embodiment of the present application, the liquid cooling plate structure includes: a flow channel plate body, the surface of which is provided with a corrosion-prone layer; the corrosion resistance of the flow channel plate body is better than the corrosion resistance of the corrosion-prone layer. In this way, when the vehicle is wading or washing the car, and impurities such as water, mud, and metal particles are deposited on the flow channel plate body, since the corrosion resistance of the flow channel plate body is better than the corrosion resistance of the corrosion-prone layer, the corrosion-prone layer is more likely to undergo electrochemical reactions and be corroded, thereby reducing the risk of the flow channel plate body being corroded by electrochemical reactions, so that the flow channel plate body can maintain good structural performance, and the liquid cooling plate structure has a good cooling effect, avoiding affecting the cooling function of the liquid cooling plate structure.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 is a schematic diagram of a liquid cooling plate structure described in an embodiment of the present application;

[0028] Figure 2 is a partial cross-sectional structural schematic diagram of a liquid cooling plate structure described in an embodiment of the present application;

[0029] Figure 3 It is a schematic diagram of the anti-corrosion principle of a liquid cooling plate structure described in an embodiment of the present application;

[0030] Figure 4 is a schematic diagram of a battery pack described in an embodiment of the present application;

[0031] Figure 5 is a top view of a battery pack described in an embodiment of the present application;

[0032] Figure 6 A battery pack according to an embodiment of the present application Figure 5 Schematic diagram of the cross-sectional structure of A-A.

[0033] Figure numerals: 10 - flow channel plate body; 20 - corrosion-prone layer; 11 - flow channel area; 12 - plane area; 30 - welding layer; 40 - thermal insulation cotton. DETAILED DESCRIPTION

[0034] The embodiments of the utility model will be 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 only used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0035] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0036] 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", "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 invention and simplifying the description, and do not indicate or imply that the referred device or element 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.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Reference Figure 1 -6, showing a schematic diagram of a liquid cooling plate structure according to an embodiment of the present application, which may specifically include: a flow channel plate body 10, a surface of the flow channel plate body 10 is provided with a corrosion-prone layer 20;

[0039] The corrosion resistance of the flow channel plate body 10 is better than that of the corrosion-prone layer 20 .

[0040] In the embodiment of the present application, when the vehicle is wading or washing, and impurities such as water, mud, and metal particles are deposited on the flow channel plate body 10, since the corrosion resistance of the flow channel plate body 10 is better than the corrosion resistance of the easily corroded layer 20, the easily corroded layer 20 is more likely to undergo electrochemical reactions and be corroded, thereby reducing the risk of the flow channel plate body 10 being corroded by electrochemical reactions, so that the flow channel plate body 10 can be better protected and maintain good structural performance, so that the liquid cooling plate structure has a better cooling effect, and the cooling function of the liquid cooling plate structure is avoided. Impact.

[0041] Specifically, in the embodiment of the present application, the flow channel plate body 10 is provided with a plurality of alternately arranged protrusions and recesses to form a plurality of flow channels. The outer surface of the flow channel plate body 10 can be connected to the thermal insulation cotton 40, and a gap is formed between the thermal insulation cotton 40 and the recessed portion, and impurities such as water, sand, and metal particles are easily deposited in the gap.

[0042] For example, in an embodiment of the present application, the liquid cooling plate structure may be a stamped brazed liquid cooling plate, or a serpentine liquid cooling plate suitable for cylindrical batteries, or a blown liquid cooling plate, etc. The embodiment of the present application may not limit the specific type of the liquid cooling plate structure.

[0043] Optionally, in the embodiment of the present application, the corrosion-prone layer 20 is a sacrificial anode layer, and the reducibility of the sacrificial anode layer is greater than the reducibility of the flow channel plate body 10. Figure 3 As shown, the sacrificial anode layer is used as the easily corroded layer 20. Since the reducing property of the sacrificial anode layer is greater than that of the flow channel plate body 10, the sacrificial anode layer is more likely to lose electrons and produce an oxidation-reduction reaction, that is, the sacrificial anode layer is more likely to undergo an electrochemical reaction and be corroded, thereby having a better protective effect on the flow channel plate body 10.

[0044] In the embodiment of the present application, optionally, the flow channel plate body 10 includes a flow channel area 11 and a plane area 12 connected to the flow channel area 11, and the corrosion-prone layer 20 is connected to the plane area 12. Specifically, the flow channel area 11 is provided with protrusions and recesses arranged alternately to form a plurality of flow channels for the transmission of the coolant, and the plane area 12 is provided with a plane structure without a flow channel. Connecting the corrosion-prone layer 20 to the plane area 12 is simple to operate, easy to implement the process steps, and reduces the difficulty of setting the corrosion-prone layer 20.

[0045] In some optional embodiments of the present application, the corrosion-prone layer 20 may also be connected to the flow channel area 11, so that the corrosion-prone layer 20 covers the position prone to corrosion, and has a better anti-corrosion effect on the flow channel plate body 10. For example, the corrosion-prone layer 20 may be connected to the concave part of the flow channel area 11, or may be connected to the convex part of the flow channel area 11, and the embodiments of the present application may not limit this.

[0046] Optionally, in the embodiment of the present application, the number of the plane areas 12 includes a plurality, and the plurality of plane areas 12 are arranged at intervals on the flow channel plate body 10; the number of the corrosion-prone layers 20 includes a plurality, and the plurality of corrosion-prone layers 20 are respectively connected to the plurality of plane areas 12, and one corrosion-prone layer 20 is correspondingly connected to one plane area 12. In this way, a plurality of corrosion-prone layers 20 are respectively arranged on the plurality of plane areas 12, which increases the arrangement area and region of the corrosion-prone layers 20, so that the corrosion-prone layers 20 with a larger area are prone to electrochemical corrosion, and the flow channel plate body 10 is protected at more locations, further improving the protection effect of the flow channel body, and improving its anti-corrosion performance.

[0047] In the embodiment of the present application, optionally, the liquid cooling plate structure further includes a welding layer 30, and the welding layer 30 is connected between the corrosion-prone layer 20 and the flow channel plate body 10, so as to weld the corrosion-prone layer 20 to the flow channel plate body 10. In this way, the connection reliability and stability between the corrosion-prone layer 20 and the flow channel plate body 10 are enhanced by the welding layer 30, and the corrosion-prone layer 20 is prevented from being easily separated from the flow channel plate body 10 after electrochemical corrosion occurs, so that the corrosion-prone layer 20 has a better protective effect on the flow channel plate body 10.

[0048] Optionally, in the embodiment of the present application, the thickness of the welding layer 30 is any value in the range of 0.02-0.15 mm. In this way, the welding layer 30 has a more suitable thickness to achieve a more stable and reliable connection between the corrosion-prone layer 20 and the flow channel plate body 10, while avoiding the influence of the corrosion-prone layer 20 due to the excessive thickness of the welding layer 30.

[0049] In the embodiment of the present application, the amount of the welding layer 30 is optionally 1.5-30 g. In this way, the welding layer 30 can achieve a relatively stable and reliable connection between the corrosion-prone layer 20 and the flow channel plate body 10, while saving the material of the welding layer 30, which is beneficial to energy conservation and emission reduction.

[0050] Specifically, the welding layer 30 is a brazing layer. In this way, the corrosion-prone layer 20 is connected to the flow channel plate body 10 through the brazing layer by a brazing process, which has the advantages of low heating temperature, small stress and deformation, and simple process. For example, the specification of the brazing layer can be 4343 or 4047, etc., and the specific specifications of the brazing layer may not be limited in the embodiment of the present application.

[0051] Optionally, the brazing layer is made of potassium fluoroaluminate. Specifically, DF-1 potassium fluorochlorate is used as the brazing layer, which can dissolve the oxide film on the surface of the flow channel plate body 10, prevent the unoxidized flow channel plate body 10 below from further oxidation, reduce the surface tension of the flow channel plate body 10, and enhance the metal flow of the brazing layer.

[0052] Specifically, in the embodiment of the present application, the process of welding the corrosion-prone layer 20 to the flow channel plate body 10 by welding agent can be: first, the surfaces of the flow channel plate body 10 and the sacrificial anode layer are cleaned respectively, then, DF-1 potassium fluoride is sprayed on the sacrificial anode layer, followed by drying, and then the sacrificial anode layer is placed on the plane area 12 of the flow channel plate body 10, and then the sacrificial anode layer and the flow channel plate body 10 are NB furnace welded, that is, brazing is performed in a furnace protected by nitrogen to achieve a stable connection between the corrosion-prone layer 20 and the flow channel plate body 10. For example, the speed of NB furnace welding can be 1000mm / min, and the furnace temperature can be 600℃±5%.

[0053] Optionally, in the embodiment of the present application, the thickness of the corrosion-prone layer 20 is any value in the range of 0.2-2 mm. In this way, the corrosion-prone layer 20 has a more suitable thickness, achieves a better protection effect on the flow channel plate body 10, and reduces the material used for the corrosion-prone layer 20.

[0054] In the embodiment of the present application, optionally, the ratio of the area S1 of the corrosion-prone layer 20 to the area S2 of the flow channel plate body 10 is: 0.5%≤S1:S2≤20%. In this way, the corrosion-prone layer 20 has a more suitable area and has a more suitable area ratio with the flow channel plate body 10, thereby achieving a better protection effect on the flow channel plate body 10.

[0055] Optionally, in the embodiment of the present application, the material of the corrosion-prone layer 20 is zinc alloy, and the material of the flow channel plate body 10 is aluminum alloy. In practical applications, the material of the flow channel plate body 10 is usually aluminum alloy or aluminum, and the reducing property of zinc alloy is stronger than that of aluminum alloy or aluminum. Therefore, zinc alloy can be used as the corrosion-prone layer 20, so that the corrosion-prone layer 20 has a stronger reducing property relative to the flow channel plate body 10, and zinc alloy is widely used, easy to obtain, and has a low cost.

[0056] For example, in the embodiment of the present application, the zinc alloy may be a zinc-aluminum alloy, for example, its specification and grade may be A380.0, A380.1, A383, A383.1 (American Standard), etc. The embodiment of the present application may not limit the specific specification type of the zinc alloy.

[0057] Optionally, in the embodiment of the present application, the shape of the corrosion-prone layer 20 includes at least one of a rectangle, a triangle, a trapezoid or a circle. That is, the shape of the corrosion-prone layer 20 can be a rectangle, a triangle, a trapezoid, a circle, a combination of the above rectangle and a triangle, a combination of a rectangle and a trapezoid, or a combination of a rectangle and a circle, etc. The number of the corrosion-prone layer 20 can be multiple, and the shapes of the multiple corrosion-prone layers 20 can be the same or different, which is not limited in the embodiment of the present application.

[0058] In summary, the liquid cooling plate structure described in the embodiment of the present application can at least include the following advantages:

[0059] In the embodiment of the present application, the liquid cooling plate structure includes: a flow channel plate body, the surface of which is provided with a corrosion-prone layer; the corrosion resistance of the flow channel plate body is better than the corrosion resistance of the corrosion-prone layer. In this way, when the vehicle is wading or washing the car, and impurities such as water, mud, and metal particles are deposited on the flow channel plate body, since the corrosion resistance of the flow channel plate body is better than the corrosion resistance of the corrosion-prone layer, the corrosion-prone layer is more likely to undergo electrochemical reactions and be corroded, thereby reducing the risk of the flow channel plate body being corroded by electrochemical reactions, so that the flow channel plate body can maintain good structural performance, and the liquid cooling plate structure has a good cooling effect, avoiding affecting the cooling function of the liquid cooling plate structure.

[0060] Reference Figure 4 -6, shows a schematic structural diagram of a battery pack described in an embodiment of the present application, wherein the battery pack includes the liquid cooling plate structure.

[0061] For example, in the embodiments of the present application, the battery pack may be a square shell battery pack, a cylindrical battery pack, a soft pack battery pack, etc. The embodiments of the present application may not limit the specific type of the battery pack.

[0062] The battery pack described in the embodiment of the present application may at least have the following advantages:

[0063] In an embodiment of the present application, the battery pack includes the liquid cooling plate structure, and the liquid cooling plate structure includes: a flow channel plate body, and a corrosion-prone layer is provided on the surface of the flow channel plate body; the corrosion resistance of the flow channel plate body is better than the corrosion resistance of the corrosion-prone layer. In this way, when the vehicle is wading or washing the car, and impurities such as water, mud, and metal particles are deposited on the flow channel plate body, since the corrosion resistance of the flow channel plate body is better than the corrosion resistance of the corrosion-prone layer, the corrosion-prone layer is more likely to undergo electrochemical reactions and be corroded, thereby reducing the risk of the flow channel plate body being corroded by electrochemical reactions, so that the flow channel plate body can maintain good structural performance, and the liquid cooling plate structure has a good cooling effect, avoiding affecting the cooling function of the liquid cooling plate structure.

[0064] An embodiment of the present application also provides a vehicle, which includes the battery pack.

[0065] For example, the vehicle may be a compact car, a mid-sized car, a three-box car, a truck, a trailer, a CDV (CXrDerived VXn, a van based on a sedan platform), an MPV (multi-Purpose Vehicles), an SUV (Sport Utility Vehicles), etc. The embodiments of the present application may not limit the specific type of the vehicle.

[0066] The vehicle described in the embodiment of the present application may at least have the following advantages:

[0067] In an embodiment of the present application, the vehicle includes the battery pack, the battery pack includes the liquid cooling plate structure, and the liquid cooling plate structure includes: a flow channel plate body, the surface of the flow channel plate body is provided with a corrosion-prone layer; the corrosion resistance of the flow channel plate body is better than the corrosion resistance of the corrosion-prone layer. In this way, when the vehicle is wading or washing the car, and impurities such as water, mud, and metal particles are deposited on the flow channel plate body, since the corrosion resistance of the flow channel plate body is better than the corrosion resistance of the corrosion-prone layer, the corrosion-prone layer is more likely to undergo electrochemical reactions and be corroded, thereby reducing the risk of the flow channel plate body being corroded by electrochemical reactions, so that the flow channel plate body can maintain good structural performance, and the liquid cooling plate structure has a good cooling effect, avoiding affecting the cooling function of the liquid cooling plate structure.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment 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 can be combined in any one or more embodiments or examples in a suitable manner.

[0069] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A liquid cooling plate structure, characterized in that: The liquid cooling plate structure comprises: a flow channel plate body, the surface of which is provided with a corrosion-prone layer; The corrosion resistance of the flow channel plate body is better than that of the easily corroded layer.

2. The liquid cooling plate structure according to claim 1, characterized in that: The easily corroded layer is a sacrificial anode layer, and the reducing property of the sacrificial anode layer is greater than the reducing property of the flow channel plate body.

3. The liquid cooling plate structure according to claim 1, characterized in that: The flow channel plate body comprises a flow channel area and a plane area connected to the flow channel area, and the corrosion-prone layer is connected to the plane area.

4. The liquid cooling plate structure according to claim 3, characterized in that: The number of the plane areas includes a plurality, and the plurality of the plane areas are arranged at intervals on the flow channel plate body; The number of the corrosion-prone layers includes a plurality, and the plurality of corrosion-prone layers are respectively connected to a plurality of the plane areas, and one corrosion-prone layer is correspondingly connected to one plane area.

5. The liquid cooling plate structure according to claim 1, characterized in that: The liquid cooling plate structure further includes a welding layer, wherein the welding layer is connected between the easily corroded layer and the flow channel plate body so as to weld the easily corroded layer to the flow channel plate body.

6. The liquid cooling plate structure according to claim 5, characterized in that: The thickness of the welding layer is any value between 0.02 and 0.15 mm.

7. The liquid cooling plate structure according to claim 5, characterized in that: The amount of the welding layer is 1.5-30g.

8. The liquid cooling plate structure according to claim 5, characterized in that: The welding layer is a brazing layer.

9. The liquid cooling plate structure according to claim 8, characterized in that: The material of the brazing layer is potassium fluoroaluminate.

10. The liquid cooling plate structure according to claim 1, characterized in that: The thickness of the easily corroded layer is any value between 0.2 and 2 mm.

11. The liquid cooling plate structure according to claim 1, characterized in that: The ratio of the area S1 of the corrosion-prone layer to the area S2 of the flow channel plate body is: 0.5%≤S1:S2≤20%.

12. The liquid cooling plate structure according to claim 1, characterized in that: The material of the easily corrosive layer is zinc alloy, and the material of the flow channel plate body is aluminum alloy.

13. The liquid cooling plate structure according to claim 1, characterized in that: The shape of the corrosion-prone layer includes at least one of a rectangle, a triangle, a trapezoid or a circle.

14. A battery pack, characterized in that: The battery pack comprises the liquid cooling plate structure according to any one of claims 1 to 13.

15. The battery pack according to claim 14, characterized in that: The battery pack also includes thermal insulation cotton, which is connected to the flow channel plate body of the liquid cooling plate structure, and there is a gap between the flow channel plate body and the thermal insulation cotton.

16. A vehicle, characterized in that: The vehicle comprises the battery pack according to any one of claims 14-15.

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