Liquid cooling plate and new energy automobile cooling device

Abstract

The utility model provides a liquid cooling plate and a new energy automobile cooling device.The liquid cooling plate comprises a plane plate and a runner plate, one face of the plane plate is connected with one face of the runner plate, the plane plate is provided with a limiting groove, the limiting groove is used for installing a battery cell module, the runner plate is provided with an avoiding opening, the limiting groove corresponds to the avoiding opening, and the plane plate is provided with a plane area; a smooth transition area is formed between the inner side wall of the limiting groove and the plane area; the liquid cooling plate further comprises an insulating layer, and the insulating layer is used for coating the face, away from the runner plate, of the plane plate. When one surface of the surface plate is coated with the insulating layer, the smooth transition area can also be uniformly coated, so that a high DC voltage withstand test is carried out on the liquid cooling plate after coating is completed, the liquid cooling plate is not electrified at the moment, the leakage current is extremely small, and the surface plate is not easily broken down by high current, namely, the requirement of high insulation and voltage withstand is met, and it can be ensured that the product is not easily broken down. The surface plate is provided with a surface plate transition area, so that the structural strength can be improved, and deformation is not prone to occurring in the transportation aspect.

Description

Technical Field

[0001] The present disclosure relates to the technical field of cooling of new energy vehicles, and in particular to a liquid cooling plate and a cooling device for new energy vehicles. Background Art

[0002] As an important heat dissipation device, liquid cooling plates play a very important role in both new energy vehicles and energy storage applications, such as the Chinese patent publication number CN212750978U.

[0003] The structure of the existing liquid cooling plate is as follows Figure 1 As shown in the figure, the liquid cooling plate consists of a flat plate (A), a nozzle (B) and a flow channel plate (C). Usually, a layer of insulating coating is sprayed on the surface of the liquid cooling plate, and it is required to be tested under a DC voltage of 4000KV for 60s. If the leakage current is less than 1mA, it can be determined that the liquid cooling plate has the insulation withstand voltage capability.

[0004] However, the flat plate (A) has a hollow structure L1. After the flat plate (A) and the flow channel plate (C) are brazed, the hollow structure of the flat plate (A) forms a right-angle area at the corner, such as Figure 2 As shown, the right-angle area causes the powder to not adhere evenly during insulation powder spraying. As a result, the liquid cooling plate still cannot meet the insulation withstand voltage requirements during the withstand voltage test, and the product is at risk of being punctured.

[0005] In view of the above problems, a liquid cooling plate is needed which can effectively insulate, withstand voltage and is not easily punctured. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a liquid cooling plate and a new energy vehicle cooling device that can effectively insulate, withstand voltage and are not easily punctured.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A liquid cooling plate comprises a plane plate and a flow channel plate, wherein one side of the plane plate is connected to one side of the flow channel plate, and the liquid cooling plate further comprises an insulating layer, wherein the insulating layer is used to coat a side of the plane plate which is away from the flow channel plate; the plane plate is provided with a limiting groove, wherein the limiting groove is used to install a battery cell module, the flow channel plate is provided with a avoiding opening, wherein the limiting groove is arranged corresponding to the avoiding opening, the plane plate is provided with a plane area, and a smooth transition area is formed between the inner side wall of the limiting groove and the plane area.

[0009] In one of the embodiments, an angle of 90° to 135° is formed between the plane area and the extension direction of the inner side wall of the limiting groove.

[0010] In one embodiment, the liquid cooling plate further includes a water inlet column and a water outlet column, the flat plate is provided with a water inlet and a water outlet, the water inlet column is installed at the water inlet, and the water outlet column is installed at the water outlet.

[0011] In one embodiment, the flow channel plate is provided with a liquid cooling channel, and the channel of the water inlet column is connected to the channel of the water outlet column through the water inlet, the liquid cooling channel and the water outlet in sequence.

[0012] In one embodiment, the flow channel plate is provided with a plurality of supporting portions, each of which is located in the liquid cooling channel and abuts against the planar plate.

[0013] In one embodiment, the liquid cooling plate further includes a brazing layer, the planar plate is provided with a first brazing area, the flow channel plate is provided with a second brazing area, and the brazing layer covers the first brazing area and the second brazing area respectively, so that the planar plate and the flow channel plate are better welded.

[0014] In one embodiment, the thickness of the soldering layer is 0.3 mm to 1 mm.

[0015] In one embodiment, the thickness of the insulating layer is 250 μm to 350 μm.

[0016] In one embodiment, the smooth transition area is an R-angle transition area.

[0017] A cooling device for a new energy vehicle comprises the liquid cooling plate described in any one of the embodiments.

[0018] Compared with the prior art, the present invention has at least the following advantages:

[0019] The above-mentioned liquid cooling plate has a smooth transition area formed between the inner wall of the limit groove and the plane area. When the insulating layer is coated on one side of the plane plate, the smooth transition area can also be evenly coated. In this way, after the coating is completed, the liquid cooling plate is subjected to a high DC voltage withstand test. At this time, the liquid cooling plate will not be charged, and the leakage current is extremely small. The plane plate is not easily broken down by high current, that is, it meets the requirements of high insulation withstand voltage, which can ensure that the product is not easily broken down. The transition area of ​​the plane plate design can also increase the structural strength and is not easily deformed during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, 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 present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a liquid cooling plate in the prior art;

[0022] Figure 2 for Figure 1 A partial structural schematic diagram of a liquid cooling plate in the prior art is shown;

[0023] Figure 3 A schematic structural diagram of a liquid cooling plate in an embodiment of the present disclosure;

[0024] Figure 4 for Figure 3 A partial enlarged view of the liquid cooling plate at position A is shown;

[0025] Figure 5 for Figure 3 The structure schematic diagram of the liquid cooling plate shown in another perspective;

[0026] Figure 6 for Figure 3 A partial structural schematic diagram of a liquid cooling plate shown;

[0027] Figure 7 for Figure 3 A schematic diagram of a portion of the structure of the liquid cooling plate from another angle shown;

[0028] Figure 8 for Figure 3 The partial structural cross-sectional view of the liquid cooling plate is shown, wherein the plane area 120 forms a certain angle with the extension direction of the inner side wall of the limiting groove 110 .

[0029] Figure numerals: 10, liquid cooling plate; 100, plane plate; 101, water inlet; 102, water outlet; 103, first brazing area; 110, limit groove; 111, smooth transition area; 120, plane area; 200, flow channel plate; 201, second brazing area; 210, avoidance port; 220, liquid cooling channel; 230, support part; 300, battery cell module; 400, water inlet column; 500, water outlet column. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] The present disclosure provides a liquid cooling plate, comprising a plane plate and a flow channel plate, wherein one side of the plane plate is connected to one side of the flow channel plate, and the liquid cooling plate further comprises an insulating layer, wherein the insulating layer is used to coat one side of the plane plate away from the flow channel plate; the plane plate is provided with a limiting groove, wherein the limiting groove is used to install a battery cell module, the flow channel plate is provided with a avoiding opening, wherein the limiting groove is arranged corresponding to the avoiding opening, the plane plate is provided with a plane area, and a smooth transition area is formed between the inner side wall of the limiting groove and the plane area.

[0034] The above-mentioned liquid cooling plate has a smooth transition area formed between the inner wall of the limit groove and the plane area. When the insulating layer is coated on one side of the plane plate, the smooth transition area can also be evenly coated. In this way, after the coating is completed, the liquid cooling plate is subjected to a high DC voltage withstand test. At this time, the liquid cooling plate will not be charged, and the leakage current is extremely small. The plane plate is not easily broken down by high current, that is, it meets the requirements of high insulation withstand voltage, which can ensure that the product is not easily broken down. The transition area of ​​the plane plate design can also increase the structural strength and is not easily deformed during transportation.

[0035] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0036] like Figures 3 to 7As shown, it is a liquid cooling plate 10 of an embodiment of the utility model, including a plane plate 100 and a flow channel plate 200, one side of the plane plate 100 is connected to one side of the flow channel plate 200, specifically, one side of the plane plate 100 is welded to one side of the flow channel plate 200, and the liquid cooling plate 10 also includes an insulating layer (not shown in the figure), the insulating layer is used to coat the side of the plane plate 100 away from the flow channel plate 200, so that the entire liquid cooling plate 10 has better insulation and withstand voltage performance during voltage testing. The plane plate 100 is provided with a limiting groove 110, the limiting groove 110 is used to install the battery module 300, the flow channel plate 200 is provided with an avoidance opening 210, the limiting groove 110 and the avoidance opening 210 are arranged correspondingly, the plane plate 100 is provided with a plane area 120, and a smooth transition area 111 is formed between the inner side wall of the limiting groove 110 and the plane area 120.

[0037] In this embodiment, the plane plate 100 is formed with a limiting groove 110 by a stamping process, and a smooth transition area 111 is formed between the inner side wall of the limiting groove 110 and the plane area 120. Specifically, the smooth transition area 111 is an R-angle (rounded corner) transition area, that is, the right-angle area of ​​the original plane plate 100 is changed into an R-angle stamping area, and then, after the insulating layer is coated on one side of the plane plate 100 and then baked and cured, the R-angle stamping area has sufficient coating thickness, which can ensure that the liquid cooling plate 10 has high insulation withstand voltage performance when the withstand voltage test is performed on the liquid cooling plate 10, and the liquid cooling plate 10 itself is not easily broken down by a large current. Further, the insulating layer is an insulating powder spray.

[0038] like Figure 8 As shown, in one embodiment, the plane area 120 forms an angle of 90° to 135° with the extension direction of the inner side wall of the limiting groove 110. In this embodiment, the plane area 120 and the extension direction of the inner side wall of the limiting groove 110 can form an angle of 110° to better ensure that the smooth transition area 111 is not easily broken down by a large current when the liquid cooling plate 10 is subjected to a withstand voltage test, so that the liquid cooling plate 10 has better insulation withstand voltage performance.

[0039] like Figure 3 , Figure 6 and Figure 7 As shown, in one embodiment, the liquid cooling plate 10 further includes a water inlet column 400 and a water outlet column 500, the flat plate 100 is provided with a water inlet 101 and a water outlet 102, the water inlet column 400 is installed at the water inlet 101, and the water outlet column 500 is installed at the water outlet 102, so that the channel of the water inlet column 400 is connected to the water inlet 101, and the channel of the water outlet column 500 is connected to the water outlet 102.

[0040] like Figure 3 , Figure 5 , Figure 6 and Figure 7As shown, in one embodiment, the flow channel plate 200 is provided with a liquid cooling channel 220, and the channel of the water inlet column 400 is connected to the channel of the water outlet column 500 through the water inlet 101, the liquid cooling channel 220 and the water outlet 102 in sequence. It can be understood that the cooling liquid enters from the channel of the water inlet column 400, passes through the water inlet 101, the liquid cooling channel 220 and the water outlet 102 in sequence, and finally exits from the channel of the water outlet column 500, thereby realizing the cooling function of the battery cell module 300 and ensuring the better performance of the battery cell module 300.

[0041] like Figure 7 As shown, in one embodiment, the flow channel plate 200 is provided with a plurality of support portions 230, each support portion 230 is located in the liquid cooling channel 220 and abuts against the flat plate 100, so as to strengthen the overall structural strength of the liquid cooling plate 10 and prevent partial areas of the liquid cooling plate 10 from being easily deformed due to various factors such as transportation process and bumps.

[0042] like Figure 6 and Figure 7 As shown, in one embodiment, the liquid cooling plate 10 also includes a brazing layer (not shown in the figure), the flat plate 100 is provided with a first brazing area 103, and the flow channel plate 200 is provided with a second brazing area 201, and the brazing layer covers the first brazing area 103 and the second brazing area 201 respectively, so that the flat plate 100 and the flow channel plate 200 can be better welded and formed.

[0043] Specifically, when forming the liquid cooling plate 10, the brazing layer covers the surface of the flat plate 100 and the flow channel plate 200, that is, covers the first brazing area 103 and the second brazing area 201, and then the two are welded by brazing to form. Furthermore, the brazing layer can be a brazing agent.

[0044] In one embodiment, the thickness of the soldering layer is 0.3 mm to 1 mm. In this embodiment, the thickness of the soldering layer is 0.6 mm.

[0045] In one embodiment, the thickness of the insulating layer is 250 μm to 350 μm. In this embodiment, the thickness of the insulating layer is 300 μm to ensure that the sprayed insulating layer has sufficient thickness to insulate the liquid cooling plate 10 from high voltage, thereby ensuring that the entire liquid cooling plate 10 has good insulation performance and ensuring the safe use experience of the product.

[0046] In one of the embodiments, the smooth transition area 111 is an R-angle transition area. It can be understood that the R-angle transition area is a non-right-angle area, and the liquid cooling plate 10 will not be broken down due to the design of the R-angle transition area. Furthermore, the liquid cooling plate 10 of the prior art has a right-angle area, and the coating thickness cannot be guaranteed to be uniform when the insulating layer is coated. Specifically, the coating thickness of the right-angle area is 100μm to 200μm, which cannot meet the thickness standard for insulation. This thickness has the risk of current breakdown, and the smooth transition area 111 does not form a right-angle area, which can ensure that the thickness is uniform when the insulating layer is coated, and thus the product has better insulation withstand voltage performance.

[0047] The present disclosure also provides a new energy vehicle cooling device, including a liquid cooling plate 10 of any embodiment, and the liquid cooling plate 10 is installed in the new energy vehicle cooling device. It can be understood that the new energy vehicle cooling device adopts the liquid cooling plate 10 of the present disclosure to better achieve the cooling effect of the liquid cooling plate 10. At the same time, the cooling plate 10 is applied to the new energy vehicle cooling device after passing the insulation test, which can also ensure the insulation and withstand voltage effect of the liquid cooling plate 10, and the safety performance of the device is further improved.

[0048] Compared with the prior art, the present invention has at least the following advantages:

[0049] The above-mentioned liquid cooling plate 10 has a smooth transition area 111 formed between the inner wall of the limit groove 110 and the plane area 120. When the insulating layer is coated on one side of the plane plate 100, specifically the side of the plane plate 100 away from the flow channel plate 200, the smooth transition area 111, i.e. the R-angle transition area, can also be evenly coated. In this way, after the coating is completed, the liquid cooling plate 10 is subjected to a high DC voltage test (specifically 4000kV). At this time, the liquid cooling plate 10 will not be charged, and the leakage current is extremely small (less than 1mA). The plane plate 100 is not easily broken down by high current, that is, it meets the requirements of high insulation withstand voltage, and can ensure that the product is not easily broken down. The design of the plane plate 100 transition area can also increase the structural strength and is not easily deformed during transportation.

[0050] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A liquid cooling plate, comprising a plane plate and a flow channel plate, wherein one side of the plane plate is connected to one side of the flow channel plate, characterized in that: The liquid cooling plate also includes an insulating layer, which is used to coat the side of the flat plate facing away from the flow channel plate; the flat plate is provided with a limiting groove, and the limiting groove is used to install the battery cell module; the flow channel plate is provided with an avoidance opening, and the limiting groove is arranged corresponding to the avoidance opening; the flat plate is provided with a flat area, and a smooth transition area is formed between the inner side wall of the limiting groove and the flat area.

2. The liquid cooling plate according to claim 1, characterized in that: An angle of 90° to 135° is formed between the plane area and the extension direction of the inner side wall of the limiting groove.

3. The liquid cooling plate according to claim 1, characterized in that: The liquid cooling plate further comprises a water inlet column and a water outlet column. The flat plate is provided with a water inlet and a water outlet. The water inlet column is installed at the water inlet, and the water outlet column is installed at the water outlet.

4. The liquid cooling plate according to claim 3, characterized in that: The flow channel plate is provided with a liquid cooling channel, and the channel of the water inlet column is connected to the channel of the water outlet column through the water inlet, the liquid cooling channel and the water outlet in sequence.

5. The liquid cooling plate according to claim 4, characterized in that: The flow channel plate is provided with a plurality of supporting parts, each of which is located in the liquid cooling channel and abuts against the plane plate.

6. The liquid cooling plate according to claim 1, characterized in that: The liquid cooling plate further comprises a brazing layer, the plane plate is provided with a first brazing area, the flow channel plate is provided with a second brazing area, and the brazing layer covers the first brazing area and the second brazing area respectively, so as to better weld the plane plate and the flow channel plate.

7. The liquid cooling plate according to claim 6, characterized in that: The thickness of the soldering layer is 0.3 mm to 1 mm.

8. The liquid cooling plate according to claim 1, characterized in that: The thickness of the insulating layer is 250 μm to 350 μm.

9. The liquid cooling plate according to claim 1, characterized in that: The smooth transition area is an R angle transition area.

10. A cooling device for a new energy vehicle, characterized in that: Comprising the liquid cooling plate according to any one of claims 1 to 9.

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