Refrigerant phase change composite liquid cooling plate

Abstract

The utility model relates to a refrigerant phase-change composite liquid cooling plate, which comprises a substrate provided with a first back side and a second back side; the refrigerant assembly comprises a refrigerant plate fixed on the first back side of the substrate, a refrigerant cavity formed between the substrate and the refrigerant plate, and a refrigerant filled in the refrigerant cavity; the fluid assembly comprises a flow channel plate fixed to the top of the refrigerant plate, a flow channel formed in the side, close to the refrigerant plate, of the flow channel plate, and fluid arranged in the flow channel in a circulating flowing mode. According to the refrigerant phase change composite liquid cooling plate, the refrigerant assembly and the fluid assembly are arranged on the first back side of the substrate, cooling and heat dissipation are carried out on heat dissipation components such as a battery pack and a battery cell on the second back side of the substrate, and battery cell burnout or explosion accidents caused by long-time heating of the battery pack, the battery cell and the like in a working mode are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of power battery heat dissipation, and specifically relates to a refrigerant phase-change composite liquid cooling plate. Background Art

[0002] Power batteries are the core components of new energy vehicles. Power batteries generate heat during the cycle process. If the heat is not dissipated in time, it will accumulate. The heat accumulation will have an immeasurable impact on the performance of the power battery. If the power battery works in a high temperature environment for a long time, its life will be significantly shortened, the performance will decline, and even safety accidents such as burning the battery or explosion may occur. It can be seen that high temperature environment has a great impact on the performance of power batteries, so corresponding heat dissipation measures must be taken to reduce the operating temperature of the power battery.

[0003] In the prior art, the most commonly used methods are air cooling or liquid cooling. Air cooling is to use forced convection of air to dissipate heat from the battery. Liquid cooling is to remove the heat generated by the power battery during operation through the circulation of coolant in the liquid cooling plate in the power battery module, so as to achieve the effect of reducing the operating temperature of the power battery.

[0004] The liquid cooling system in the prior art cannot fully meet the requirements of structures with high heat in small areas. Simply relying on air cooling for heat dissipation does not have a significant heat dissipation effect on the power battery. Utility Model Content

[0005] The utility model aims to overcome the defects of the liquid cooling system in the prior art that it cannot meet the heat exchange requirements of some high-calorie products and accelerate the cooling effect.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a refrigerant phase change composite liquid cold plate, which comprises:

[0007] a substrate having a first back side and a second back side;

[0008] A refrigerant assembly, the refrigerant assembly comprising a refrigerant plate fixed to the first back side of the substrate, a refrigerant cavity formed between the substrate and the refrigerant plate, and a refrigerant filled in the refrigerant cavity;

[0009] The fluid component includes a flow channel plate fixed on the top of the refrigerant plate, a flow channel formed on a side of the flow channel plate close to the refrigerant plate, and a fluid that can circulate in the flow channel.

[0010] Optimally, the refrigerant assembly also includes a first fixing plate integrally connected to the periphery of the refrigerant plate and fixed to the base plate, a through hole penetrating the refrigerant plate, and a fin fixed to the top of the base plate and located in the refrigerant cavity, wherein the fin rests against the bottom of the refrigerant plate.

[0011] Preferably, the fluid assembly further includes a second fixing piece integrally connected to the periphery of the flow channel plate and fixed to the first fixing piece, a first fixing hole penetrating through the flow channel, and a second fixing hole penetrating through the flow channel plate and cooperating with the through hole.

[0012] Preferably, it further includes a water pipe joint fixed to the top of the first fixing hole and a refrigerant joint fixed to the top of the second fixing hole. The water pipe joint is communicated with the flow channel, and the refrigerant joint is communicated with the refrigerant cavity.

[0013] Preferably, the water pipe joint includes a water pipe body and a water pipe groove penetrating through the water pipe body and communicated with the flow channel.

[0014] Preferably, the refrigerant joint includes a refrigerant pipe and a refrigerant groove penetrating through the refrigerant pipe. The refrigerant groove is communicated with the refrigerant cavity.

[0015] Preferably, the water pipe joint further includes a pressing plate integrally connected to the bottom of the water pipe body and a fixing ring integrally connected to the bottom of the pressing plate. The outer diameter of the pressing plate is larger than that of the fixing ring, and the outer diameter of the fixing ring is larger than the diameter of the first fixing hole.

[0016] Preferably, the water pipe joint further includes a first convex portion and a second convex portion integrally connected to the top of the water pipe body. The diameter of the first convex portion gradually increases from top to bottom, and the diameter of the second convex portion gradually decreases from top to bottom.

[0017] Preferably, the refrigerant pipe includes a refrigerant main pipe and a refrigerant sub-pipe integrally connected to the bottom of the refrigerant main pipe. The refrigerant sub-pipe is inserted into the second fixing hole.

[0018] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0019] The refrigerant phase change composite liquid cooling plate of the present utility model has a simple structure. By arranging a refrigerant assembly and a fluid assembly on the first back side of the substrate, heat dissipation components such as a battery pack and a battery cell on the second back side of the substrate are cooled, avoiding the occurrence of accidents such as battery cell burnout or explosion caused by the long-term heating of the battery pack, battery cell, etc. during the working mode. Moreover, through the combination of liquid cooling and refrigerant phase change, the heat dissipation and cooling efficiency is higher, improving the heat dissipation effect of components such as the battery pack and the battery cell on the second back side of the substrate. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the present utility model;

[0021] Figure 2 is a cross-sectional view of the present utility model;

[0022] Figure 3It is a cross-sectional view of the present utility model;

[0023] Figure 4 This is the present utility model Figure 2 An enlarged view of part A in the present utility model;

[0024] Figure 5 This is the present utility model Figure 3 An enlarged view of part B in the present utility model;

[0025] Figure 6 It is a schematic structural diagram of the present utility model after removing the flow channel plate;

[0026] Figure 7 It is a schematic structural diagram of the flow channel plate of the present utility model;

[0027] Figure 8 It is a cross-sectional view of the water pipe joint of the present utility model;

[0028] Explanation of reference numerals:

[0029] 1. Substrate; 2. Refrigerant plate; 3. First fixing piece; 4. Refrigerant cavity; 5. Flow channel plate; 6. Second fixing piece; 7. Flow channel; 8. First fixing hole; 9. Second fixing hole; 10. Through hole; 11. First transition arc; 12. Second transition arc; 13. Deformation groove; 14. Water pipe joint; 141. Water pipe body; 142. Water pipe groove; 143. Baffle plate; 144. Fixing ring; 145. First protrusion; 146. Second protrusion; 15. Refrigerant joint; 151. Refrigerant main pipe; 152. Refrigerant branch pipe; 153. Refrigerant groove; 154. Internal thread; 16. Groove; 17. Fin. Detailed implementation mode

[0030] The present utility model will be further described below with reference to the embodiments shown in the drawings.

[0031] As Figure 1 shown, it is a schematic structural diagram of the refrigerant phase change composite liquid cooling plate of the present utility model. As Figure 2 , 3 shown, they are two groups of cross-sectional views of the refrigerant phase change composite liquid cooling plate of the present utility model, and the cross-sectional planes are respectively the central plane of the water pipe joint 14 and the central plane of the refrigerant joint 15. It is usually used for cooling and heat dissipation of heat dissipation components such as battery packs and battery cells, and avoids the occurrence of battery cell burnout or explosion accidents caused by long-term heating of battery packs and battery cells in the working mode.

[0032] The composite liquid cooling plate includes a substrate 1, a refrigerant assembly, a fluid assembly, a water pipe joint 14 and a refrigerant joint 15. Among them, the substrate 1 has a first back side and a second back side. As Figure 2 , 3As shown, the upper surface of the substrate 1 is the first back side, and the lower surface of the substrate 1 is the second back side. Heat-generating components such as battery packs and battery cells are arranged on the second back side of the substrate 1, that is, the lower surface of the substrate 1.

[0033] The refrigerant component is fixed on the first back side of the substrate 1 (i.e., the upper surface of the substrate 1), and the fluid component is fixed on the side away from the substrate 1 of the refrigerant component. The heat dissipation and cooling of the battery cells on the second back side of the substrate 1 are jointly completed by the refrigerant component and the fluid component, improving the heat dissipation and cooling efficiency of battery packs, battery cells, etc.

[0034] There is a set of two water pipe connectors 14, which are fixedly arranged at intervals on the top of the fluid component and are connected to the fluid component. One of the water pipe connectors 14 is the water inlet pipe, and the other water pipe connector 14 is the water outlet pipe. Fluid is introduced from one of the water pipe connectors 14 and flows out from the other water pipe connector 14. During the circulation process, the fluid takes away the heat generated by the battery packs and battery cells on the second back side of the substrate 1, avoiding the occurrence of battery cell burnout or explosion accidents caused by the long-term heating of battery packs, battery cells, etc. during the working mode.

[0035] There is a set of two refrigerant connectors 15, which are fixedly arranged at intervals on the top of the fluid component, pass through the fluid component and are connected to the refrigerant component. Refrigerant is injected from one of the refrigerant connectors 15 and stored in the refrigerant component. The heat generated by the battery packs and battery cells on the second back side of the substrate 1 is taken away by relying on the phase change of the refrigerant, avoiding the occurrence of battery cell burnout or explosion accidents caused by the long-term heating of battery packs, battery cells, etc. during the working mode (chemours opteon sf33 refrigerant is selected as the refrigerant).

[0036] By setting two refrigerant connectors 15, when injecting refrigerant into the refrigerant component, it is ensured that the air pressure inside and outside the refrigerant component is the same, facilitating the injection of refrigerant. After the refrigerant is injected into the refrigerant component, the cover plate can be fixed on the refrigerant connector 15 to avoid the leakage of the refrigerant inside the refrigerant component.

[0037] In this embodiment, since the refrigerant component is in direct contact with the substrate 1, the refrigerant component plays a major heat dissipation role; while the fluid component is not in direct contact with the substrate 1, so the fluid component only assists the refrigerant component in heat dissipation.

[0038] The refrigerant component is fixed on the first back side of the substrate 1 (i.e., the upper surface of the substrate 1). The heat generated by the battery packs and battery cells on the second back side of the substrate 1 is taken away by the phase change of the internal refrigerant. The refrigerant component includes a refrigerant plate 2, a first fixing piece 3, a refrigerant cavity 4, a first transition arc 11 and fins 17. The refrigerant plate 2 is a rectangular plate, and the first fixing piece 3 is integrally connected to the periphery of the refrigerant plate 2, and there is a height difference between the first fixing piece 3 and the refrigerant plate 2 in the horizontal plane. Therefore, when the first fixing piece 3 is fixed on the substrate 1, a refrigerant cavity 4 is formed between the refrigerant plate 2 and the substrate 1, facilitating the storage of refrigerant.

[0039] The first transition arc 11 is integrally connected to the connection between the refrigerant plate 2 and the first fixing piece 3. The first transition arc 11 smoothly connects the refrigerant plate 2 and the first fixing piece 3, so as to ensure the strength and stability of the overall structure. The refrigerant plate 2 and the first fixing piece 3 are integrally formed by stamping process, so the first transition arc 11 is formed at the connection between the refrigerant plate 2 and the first fixing piece 3.

[0040] The groove 16 is opened on the upper surface of the substrate 1, that is, the first back side of the substrate 1. The fin 17 is fixed in the groove 16 and abuts against one side of the refrigerant plate 2 close to the substrate 1. The fin 17 is arranged in the refrigerant cavity 4 to support the refrigerant plate 2, improve the structural strength of the refrigerant plate 2, and at the same time prevent the refrigerant plate 2 from deforming and denting inward.

[0041] The fin 17 is in the shape of a dovetail groove, which can not only support the refrigerant plate 2, but also there is a groove cavity inside the fin 17, which is convenient for the filling of the refrigerant. The shape of the fin 17 is not limited to the dovetail groove type, and can also be replaced by an "I" shape or a "W" shape.

[0042] The fluid component is fixed on the side of the refrigerant component away from the substrate 1, and assists the refrigerant component to jointly complete the heat dissipation of the battery cells on the second back side of the substrate 1, improving the heat dissipation and cooling efficiency of the battery pack, battery cells, etc. As Figure 7 shown, the fluid component includes a flow channel plate 5, a second fixing piece 6 and a flow channel 7.

[0043] The second fixing piece 6 is integrally connected to the periphery of the flow channel plate 5. The second transition arc 12 is integrally connected to the connection between the flow channel plate 5 and the second fixing piece 6. The second transition arc 12 smoothly connects the flow channel plate 5 and the second fixing piece 6, so as to ensure the strength and stability of the overall structure. The flow channel plate 5 and the second fixing piece 6 are integrally formed by stamping process, so the second transition arc 12 is formed at the connection between the flow channel plate 5 and the second fixing piece 6.

[0044] The flow channel 7 is arranged on the side of the flow channel plate 5 close to the refrigerant plate 2. The flow channel 7 is punched out on the flow channel plate 5 by stamping process. The flow channel 7 is in an "S" shape. The fluid is introduced into the flow channel 7 and circulates in the flow channel 7. The fluid takes away the heat generated by the battery pack and battery cells on the second back side of the substrate 1 during the circulation process.

[0045] As Figure 4 shown, a deformation groove 13 is formed between the first transition arc 11 and the second transition arc 12. When cooling the battery pack and battery cells on the second back side of the substrate 1, it is avoided that the refrigerant plate 2 and the flow channel plate 5 are over-extruded under the influence of thermal expansion and contraction, so a deformation space is reserved in advance.

[0046] The water pipe joints 14 are fixed at intervals on the top of the flow channel plate 5. The fluid enters from one of the water pipe joints 14 and flows out from another water pipe joint 14. During the circulation process, the fluid takes away the heat generated by the battery pack and the battery cell on the second back side of the substrate 1. Figure 8 As described above, the water pipe joint 14 includes a water pipe body 141 , a water pipe groove 142 , a stop plate 143 , a fixing ring 144 , a first protruding portion 145 and a second protruding portion 146 .

[0047] The abutment plate 143 is integrally connected to the bottom of the water pipe body 141, and the fixing ring 144 is integrally connected to the bottom of the abutment plate 143. The outer diameter of the abutment plate 143 is larger than the outer diameter of the fixing ring 144, and the outer diameter of the fixing ring 144 is larger than the diameter of the first fixing hole 8 on the flow channel plate 5. Therefore, the fixing ring 144 is inserted into the first fixing hole 8 by interference fit. When the abutment plate 143 abuts against the upper surface of the flow channel plate 5, the insertion stops, so as to avoid the insertion depth being too deep and blocking the flow channel 7, thereby avoiding affecting the circulation of the fluid.

[0048] The first protrusion 145 and the second protrusion 146 are integrally connected to the top of the water pipe joint 14. The diameter of the first protrusion 145 gradually expands from top to bottom, and the diameter of the second protrusion 146 gradually decreases from top to bottom. When installing the external water pipe, under the guidance of the first protrusion 145, it is convenient for the water pipe to be installed on the water pipe body 141. After the water pipe is installed, it is tied to the water pipe with a wire to fix the water pipe. At this time, under the limiting effect of the second protrusion 146, the wire and the water pipe are prevented from slipping upward.

[0049] Fluid (such as cooling water) enters from one of the water pipe joints 14 and flows out from the other water pipe joint 14. During the circulation process, the fluid takes away the heat generated by the battery pack and battery cells on the second back side of the substrate 1, thereby preventing the battery pack, battery cells, etc. from burning out or exploding due to long-term heating in the working mode.

[0050] The refrigerant connector 15 is fixed at intervals on the top of the fluid component, passes through the fluid component and is connected to the refrigerant component. The refrigerant is injected from one of the refrigerant connectors 15 and stored in the refrigerant component. The heat generated by the battery pack and the battery cell on the second back side of the substrate 1 is taken away by the phase change of the refrigerant. Figure 5 As shown, the refrigerant joint 15 includes a refrigerant main pipe 151 , a refrigerant sub-pipe 152 , a refrigerant groove 153 and an internal thread 154 .

[0051] The refrigerant sub-pipe 152 is integrally connected to the bottom of the refrigerant main pipe 151 and is inserted into the second fixing hole 9 of the flow channel plate 5. The refrigerant plate 2 is provided with a through hole 10 that matches the second fixing hole 9 to facilitate the passage of the refrigerant. The diameter of the refrigerant main pipe 151 is larger than the diameter of the refrigerant sub-pipe 152. When the refrigerant main pipe 151 abuts against the upper surface of the flow channel plate 5, the insertion is stopped to avoid the insertion depth being too deep and blocking the refrigerant cavity 4, thereby avoiding affecting the passage of the refrigerant.

[0052] The internal thread 154 is provided on the inner side wall of the refrigerant tank 153. After the refrigerant is introduced, the cover plate is screwed onto the refrigerant joint 15 to prevent the leakage of the refrigerant inside the refrigerant assembly. The fixing method of the cover plate is not limited to threaded connection, and it can also be buckled into the refrigerant tank 153 by a buckling method.

[0053] The refrigerant phase change composite liquid cooling plate of the present utility model cools and dissipates heat from heat dissipation components such as the battery pack and battery cells on the second back side of the substrate 1 by arranging a refrigerant assembly and a fluid assembly on the first back side of the substrate 1, avoiding the occurrence of accidents such as burning out or explosion of the battery cells caused by the long-term heating of the battery pack, battery cells, etc. during the working mode. Moreover, through the combination of liquid cooling and refrigerant phase change, the heat dissipation and cooling efficiency is higher, improving the heat dissipation effect of components such as the battery pack and battery cells on the second back side of the substrate 1.

[0054] The above embodiments are only for illustrating the technical concept and characteristics of the present utility model, and the purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly, and it should not be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A refrigerant phase change composite liquid cooling plate, characterized in that It includes: a substrate (1) having a first back side and a second back side; a refrigerant assembly including a refrigerant plate (2) fixed to the first back side of the substrate (1), a refrigerant cavity (4) formed between the substrate (1) and the refrigerant plate (2), and a refrigerant filled in the refrigerant cavity (4); a fluid assembly including a flow channel plate (5) fixed to the top of the refrigerant plate (2), a flow channel (7) formed on the side of the flow channel plate (5) close to the refrigerant plate (2), and a fluid disposed in the flow channel (7) to circulate; 2. The refrigerant phase change composite liquid cooling plate according to claim 1, wherein: The refrigerant assembly further includes a first fixing piece (3) integrally connected to the periphery of the refrigerant plate (2) and fixed to the substrate (1), a through hole (10) penetrating the refrigerant plate (2), and a fin (17) fixed to the top of the substrate (1) and located in the refrigerant cavity (4), and the fin (17) abuts against the bottom of the refrigerant plate (2).

3. The refrigerant phase change composite liquid cooling plate according to claim 2, wherein: The fluid assembly further includes a second fixing piece (6) integrally connected to the periphery of the flow channel plate (5) and fixed to the first fixing piece (3), a first fixing hole (8) penetrating the flow channel (7), and a second fixing hole (9) penetrating the flow channel plate (5) and cooperating with the through hole (10).

4. The refrigerant phase change composite liquid cooling plate according to claim 3, wherein: It further includes a water pipe joint (14) fixed to the top of the first fixing hole (8) and a refrigerant joint (15) fixed to the top of the second fixing hole (9), the water pipe joint (14) is communicated with the flow channel (7), and the refrigerant joint (15) is communicated with the refrigerant cavity (4).

5. The refrigerant phase change composite liquid cooling plate according to claim 4, characterized in that: The water pipe joint (14) includes a water pipe body (141) and a water pipe groove (142) penetrating the water pipe body (141) and communicated with the flow channel (7).

6. The refrigerant phase change composite liquid cooling plate according to claim 4, characterized in that: The refrigerant joint (15) includes a refrigerant pipe and a refrigerant groove (153) penetrating the refrigerant pipe, and the refrigerant groove (153) is communicated with the refrigerant cavity (4).

7. The refrigerant phase change composite liquid cooling plate according to claim 5, wherein: The water pipe joint (14) further includes a pressing plate (143) integrally connected to the bottom of the water pipe body (141) and a fixing ring (144) integrally connected to the bottom of the pressing plate (143), the outer diameter of the pressing plate (143) is larger than the outer diameter of the fixing ring (144), and the outer diameter of the fixing ring (144) is larger than the diameter of the first fixing hole (8).

8. The refrigerant phase change composite liquid cooling plate according to claim 5, characterized in that: The water pipe joint (14) further includes a first protruding portion (145) and a second protruding portion (146) integrally connected to the top of the water pipe body (141), the diameter of the first protruding portion (145) gradually expands from top to bottom, and the diameter of the second protruding portion (146) gradually contracts from top to bottom.

9. The refrigerant phase change composite liquid cooling plate according to claim 6, characterized in that: The refrigerant pipe includes a refrigerant main pipe (151) and a refrigerant sub-pipe (152) integrally connected to the bottom of the refrigerant main pipe (151), and the refrigerant sub-pipe (152) is inserted into the second fixing hole (9).

Images