A double-sided heat dissipation liquid cold plate

Abstract

The present invention discloses a double-sided heat dissipation liquid cooling plate, which includes a plate-shaped body. The plate-shaped body is formed by splicing a front panel and a back panel, and a liquid cooling cavity is formed inside. Liquid inlet pipes and liquid outlet pipes are respectively arranged on the upper and lower sides of the front panel. A plurality of liquid outlet holes communicating with the inside of the liquid cooling cavity are arranged along the length direction of the liquid inlet pipes. At least two rows of flow disturbance plates are arranged in the liquid cooling cavity, and the flow disturbance plates are arranged in the middle area between the liquid inlet pipes and the liquid outlet pipes. Heat dissipation fins formed by milling are arranged on the inner wall of the front panel, and heat dissipation fins formed by milling are also arranged on the inner wall of the back panel. The heat dissipation fins on the inner wall of the back panel and the heat dissipation fins on the inner wall of the front panel cross each other. External heat is transferred to the inside of the liquid cooling cavity through the plate-shaped body and the heat dissipation fins on the inner wall of the plate-shaped body, and then the heat is carried away by the circulating cooling liquid inside the liquid cooling cavity. The liquid cooling plate of the present invention improves the full fluidity and double-sided heat conduction and heat dissipation performance of the cooling liquid inside the liquid cooling cavity.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery cooling devices, and particularly relates to a double-sided heat dissipation liquid cooling plate. Background Art

[0002] Driven by energy and environmental crises, governments and automobile enterprises around the world have invested a great deal of energy in developing electric vehicles to reduce dependence on fossil energy and mitigate emissions. Electric vehicles are powered by on-board chemical energy storage systems, and the performance and quality of these vehicles also largely depend on the battery systems they are equipped with. The rise in battery temperature will affect the life and stability of battery cells. High temperatures will accelerate the consumption of electrolytes, the aging of electrodes and separators, and the aging rate of battery cores at high temperatures will be significantly faster than that of the low-temperature part.

[0003] Currently, in the selection of battery liquid cooling system methods in new energy vehicles, liquid cooling is the mainstream liquid cooling system. Compared with air cooling, liquid cooling has higher efficiency and saves space. The traditional power battery liquid cooling plate has a structure with a flat upper surface and welded heat dissipation flat tubes at the lower part or welded heat dissipation flat tubes between the upper and lower flat surfaces. This tube-structured liquid cooling plate is easy to produce, but has a high cost, a long flow path, and general heat dissipation uniformity (the longer the flow path, the higher the temperature accumulated in the later stage of the flow path), general heat transfer and heat dissipation effects, and a strengthening structure needs to be designed to ensure the structural strength of the liquid cooling plate assembly. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a double-sided heat dissipation liquid cooling plate.

[0005] The present invention is realized through the following technical solutions:

[0006] A double-sided heat dissipation liquid cooling plate includes a plate-shaped body, which is formed by splicing a front panel and a back panel, and a liquid cooling cavity is formed inside;

[0007] One side of the front panel is provided with an inlet pipe, and the other side opposite to it is provided with an outlet pipe; one end of the inlet pipe is an inlet, and a plurality of liquid outlet holes communicating with the inside of the liquid cooling cavity are arranged along the length direction of the inlet pipe, and one end of the outlet pipe is an outlet;

[0008] At least two rows of flow disturbance plates are arranged on the inner wall of the front panel or the back panel. The flow disturbance plates are parallel to the inlet pipe or the outlet pipe, and are arranged in the middle area between the inlet pipe and the outlet pipe. A plurality of flow path holes are arranged on each row of flow disturbance plates, and the flow path holes on adjacent two rows of flow disturbance plates are arranged staggeredly;

[0009] Heat dissipation fins formed by milling are arranged on the inner wall of the front panel, and heat dissipation fins formed by milling are also arranged on the inner wall of the back panel. The heat dissipation fins on the inner wall of the back panel and the heat dissipation fins on the inner wall of the front panel cross each other;

[0010] The arrangement of the liquid outlet holes on the liquid inlet pipe is as follows: in the direction from the liquid inlet of the liquid inlet pipe to the exhaust port at the other end, the gap between adjacent liquid outlet holes gradually decreases.

[0011] In the above technical solution, an exhaust port is provided at the other end opposite to the liquid inlet of the liquid inlet pipe, and a nut is provided at the exhaust port.

[0012] In the above technical solution, the distance between the liquid inlet of the liquid inlet pipe and the nearest liquid outlet hole is 3 - 4 cm; the distance between the exhaust port of the liquid inlet pipe and the nearest liquid outlet hole is 2 - 3 cm.

[0013] In the above technical solution, each side of the spoiler includes multiple rows of heat dissipation fins, and a certain distance is maintained between each row of heat dissipation fins to form a transverse flow channel. Each heat dissipation fin is longitudinally arranged, and the gap between adjacent two heat dissipation fins forms a longitudinal flow channel. Herein, the longitudinal direction refers to the direction perpendicular to the liquid inlet pipe or the liquid outlet pipe, and the transverse direction refers to the length direction of the liquid inlet pipe or the liquid outlet pipe.

[0014] In the above technical solution, the number of the liquid discharge holes on the liquid outlet pipe is one, and the liquid discharge hole is arranged at the diagonal position of the liquid inlet.

[0015] In the above technical solution, the liquid inlet of the liquid inlet pipe and the liquid outlet of the liquid outlet pipe are arranged on the same side.

[0016] In the above technical solution, the inner side wall of the liquid inlet pipe adopts a stepped surface structure, and the inner side wall of the liquid outlet pipe also adopts a stepped surface structure.

[0017] In the above technical solution, the left and right sides of the back panel have folding plates for welding with the front panel.

[0018] In the above technical solution, the number of the liquid discharge holes on the liquid outlet pipe is multiple, and the multiple liquid discharge holes are arranged at intervals along the length direction of the liquid outlet pipe.

[0019] In the above technical solution, there is also a certain gap between the heat dissipation fins on the upper side of the spoiler and the spoiler, forming a transverse flow channel; there is also a certain gap between the heat dissipation fins on the lower side of the spoiler and the spoiler, forming a transverse flow channel; there is also a certain gap between the heat dissipation fins on the lower side of the liquid inlet pipe and the liquid inlet pipe, forming a transverse flow channel; there is also a certain gap between the heat dissipation fins on the upper side of the liquid outlet pipe and the liquid outlet pipe, forming a transverse flow channel.

[0020] The advantages and beneficial effects of the present invention are as follows:

[0021] 1. The inner wall of the liquid cooling plate is provided with heat dissipation fins, which can lead the heat outside the plate to the inside of the liquid cooling cavity. Compared with the traditional serpentine tube liquid cooling method, the heat dissipation area of the present invention is greatly increased, and the heat exchange efficiency is improved. Moreover, the heat dissipation fins are formed by milling on the liquid cooling plate body, completely eliminating the contact thermal resistance and greatly enhancing the heat dissipation performance.

[0022] 2. The inner walls of the front panel and the back panel of the liquid cooling plate are both provided with heat dissipation fins, so that the liquid cooling plate has a double-sided heat dissipation function. When in use, the liquid cooling plate is arranged between two battery cores to complete the cooling of the battery cores on both sides. In addition, the heat dissipation fins on the inner wall of the back panel and the heat dissipation fins on the inner wall of the front panel intersect with each other (that is, each heat dissipation fin on the inner wall of the back panel is inserted into the gap between each heat dissipation fin on the inner wall of the front panel), so as to not only ensure good double-sided heat dissipation of the liquid cooling plate, but also ensure the ultra-thin thickness of the liquid cooling plate.

[0023] 3. Along the length direction of the liquid inlet pipe, a plurality of liquid outlet holes communicating with the inside of the liquid cooling cavity are arranged. The arrangement mode of the liquid outlet holes on the liquid inlet pipe is as follows: from the liquid inlet of the liquid inlet pipe to the exhaust port at the other end, the liquid outlet holes are arranged more and more densely. The function of this is to make the liquid outlet volume at each part along the length direction of the liquid inlet pipe as balanced as possible, make the liquid inside the liquid cooling cavity flow fully, and improve the heat exchange efficiency.

[0024] 4. A flow disturbing plate is arranged in the liquid cooling cavity. The flow disturbing plate is arranged in the middle area between the liquid inlet pipe and the liquid outlet pipe, and the heat dissipation fins are distributed on both sides of the flow disturbing plate. Each side includes multiple rows of heat dissipation fins, and a certain distance is maintained between each row of heat dissipation fins to form a transverse flow channel. Each heat dissipation fin is longitudinally arranged, and the gap between two adjacent heat dissipation fins forms a longitudinal flow channel. Such an arrangement mode can fully increase the transverse and longitudinal fluidity of the liquid inside the liquid cooling cavity. Moreover, since the flow disturbing plate is located in the middle area between the liquid inlet pipe and the liquid outlet pipe (that is, on the longitudinal center line of the entire liquid cooling cavity), under the action of the flow disturbing plate, a secondary acceleration disturbance of the liquid can be formed in the middle area, enhancing the fluidity of the liquid on both sides of the flow disturbing plate.

[0025] 5. Compared with the traditional tubular liquid cooling plate, the liquid cooling cavity inside the liquid cooling plate of the present invention is an integral one, and the liquid inside the entire liquid cooling cavity can flow, avoiding the disadvantage of too long single serpentine tube flow path.

[0026] In summary, under the combined action of the above-mentioned many factors, the liquid cooling plate of the present invention improves the full fluidity and double-sided heat conduction and heat dissipation of the cooling liquid inside the liquid cooling cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an external view of the double-sided heat dissipation liquid cooling plate of the present invention.

[0028] Figure 2It is a schematic internal structure diagram of the front panel of the double-sided heat dissipation liquid cooling plate of the present invention.

[0029] Figure 3 It is a schematic internal structure diagram of the back panel of the double-sided heat dissipation liquid cooling plate of the present invention.

[0030] Figure 4 It is a schematic structural diagram (side view) when the front panel and the back panel of the double-sided heat dissipation liquid cooling plate of the present invention are spliced.

[0031] Figure 5 It is a cross-sectional view after the front panel and the back panel of the double-sided heat dissipation liquid cooling plate of the present invention are spliced.

[0032] Figure 6 It is a partially enlarged schematic diagram at the liquid inlet pipe of the double-sided heat dissipation liquid cooling plate of the present invention.

[0033] Wherein:

[0034] 1: Plate-shaped body, 2: Liquid inlet pipe, 2-1: Liquid inlet, 2-2: Exhaust port, 2-3: Nut, 2-4: Liquid outlet hole, 3: Liquid outlet pipe, 3-1: Liquid outlet, 3-2: Drain hole, 4: First row of flow disturbance plates, 5: Second row of flow disturbance plates, 6: Heat dissipation fins, a: Front panel, b: Back panel, a-1: First plane, a-2: Second plane, a-3: Step surface, b-2: Heat dissipation fins.

[0035] For those of ordinary skill in the art, without creative efforts, other relevant drawings can be obtained based on the above drawings. Specific embodiments

[0036] In order to enable those in the technical field to better understand the solution of the present invention, the technical solution of the present invention will be further described below in conjunction with specific embodiments.

[0037] Embodiment 1

[0038] A double-sided heat dissipation liquid cooling plate includes a plate-shaped body 1. The plate-shaped body is square and is formed by splicing (welding) a front panel a and a back panel b, and a liquid cooling cavity is formed inside.

[0039] See the appendix Figure 2 , which is a schematic internal structure diagram of the front panel a. A liquid inlet pipe 2 is provided on one side ( Figure 2 the upper side in the figure) of the front panel a, and a liquid outlet pipe 3 is provided on the opposite side ( Figure 2 the lower side in the figure). The coolant enters the inside of the liquid cooling cavity from the liquid inlet pipe and is discharged from the liquid outlet pipe for cooling.

[0040] One end of the liquid inlet pipe 2 is a liquid inlet 2-1, and the other end is an exhaust port 2-2. The liquid inlet adopts a quick-connection structure for convenient quick connection with an external pipeline. A nut 2-3 is provided at the exhaust port 2-2. When needed, the nut 2-3 is adjusted to release air. A plurality of liquid outlet holes 2-4 communicating with the inside of the liquid cooling chamber are provided along the length direction of the liquid inlet pipe 2 so that the coolant enters the liquid cooling chamber. One end of the liquid outlet pipe 3 is a liquid outlet 3-1. The liquid outlet adopts a quick-connection structure for convenient quick connection with an external pipeline. A liquid discharge hole 3-2 communicating with the liquid cooling chamber is provided on the liquid outlet pipe to introduce the liquid inside the liquid cooling chamber into the liquid outlet pipe and discharge it from the liquid outlet 3-1 of the liquid outlet pipe.

[0041] Two rows of flow deflectors 4 and 5 are provided on the inner wall of the front panel. The flow deflectors are parallel to the liquid inlet pipe or the liquid outlet pipe. The flow deflectors are arranged in the middle area between the liquid inlet pipe and the liquid outlet pipe. A plurality of flow channels are provided on each row of flow deflectors, and the flow channels 4-1 on the first row of flow deflectors 4 and the flow channels 5-1 on the second row of flow deflectors 5 are arranged staggeredly to achieve the flow deflection of the liquid inside the liquid cooling chamber and enhance the fluidity.

[0042] The inner wall of the front panel is provided with heat dissipation fins 6 formed by milling ( Figure 2 Only some of the heat dissipation fins are shown. The heat dissipation fins are evenly distributed along the transverse direction of the front panel). The external heat is transferred to the inside of the liquid cooling chamber through the front panel body and the heat dissipation fins on the inner wall of the front panel, and then the circulating coolant inside the liquid cooling chamber takes away the heat. The heat dissipation fins are distributed on both sides of the flow deflectors. Each side preferably includes 2-3 rows of heat dissipation fins. A certain distance is maintained between each row of heat dissipation fins to form a transverse flow channel. Each heat dissipation fin is longitudinally arranged, and the gap between adjacent two heat dissipation fins forms a longitudinal flow channel. Among them, the longitudinal direction refers to the direction from the liquid inlet pipe to the liquid outlet pipe (that is, the direction perpendicular to the liquid inlet pipe or the liquid outlet pipe), and the transverse direction refers to the length direction of the liquid inlet pipe or the liquid outlet pipe.

[0043] Furthermore, the arrangement of the liquid outlet holes 2-4 on the liquid inlet pipe is as follows: in the direction from the liquid inlet of the liquid inlet pipe to the exhaust port at the other end, the gap between adjacent liquid outlet holes gradually decreases, that is, in the direction from the liquid inlet of the liquid inlet pipe to the exhaust port at the other end, the liquid outlet holes are arranged more and more densely. The function of this is that since the pressure of the liquid in the liquid inlet pipe gradually decreases from the liquid inlet to the exhaust port, if the liquid outlet holes are arranged at equal intervals, the liquid discharge amount of the liquid outlet holes will also become smaller and smaller from the liquid inlet to the exhaust port, resulting in uneven liquid flow in the liquid cooling cavity and affecting the heat exchange efficiency. Therefore, by adopting the arrangement method of the liquid outlet holes of the present invention, the liquid discharge amount at each part along the length direction of the liquid inlet pipe can be made as balanced as possible, the liquid in the liquid cooling cavity can flow fully, and the heat exchange efficiency can be improved. Furthermore, the distance between the liquid outlet hole closest to the liquid inlet of the liquid inlet pipe and the liquid inlet of the liquid inlet pipe should not be too large, preferably 3-4 cm; the distance between the liquid outlet hole closest to the exhaust port of the liquid inlet pipe and the exhaust port of the liquid inlet pipe should not be too large, preferably 2-3 cm.

[0044] Furthermore, the number of the liquid discharge holes 3-2 on the liquid outlet pipe is one, and the liquid discharge hole is arranged at the diagonal position of the liquid inlet.

[0045] Furthermore, the liquid inlet 2-1 of the liquid inlet pipe and the liquid outlet 3-1 of the liquid outlet pipe are preferably arranged on the same side.

[0046] Furthermore, there is also a certain gap between the heat dissipation fins on the upper side of the spoiler and the spoiler, forming a transverse flow channel; there is also a certain gap between the heat dissipation fins on the lower side of the spoiler and the spoiler, forming a transverse flow channel; there is also a certain gap between the heat dissipation fins on the lower side of the liquid inlet pipe and the liquid inlet pipe, forming a transverse flow channel; there is also a certain gap between the heat dissipation fins on the upper side of the liquid outlet pipe and the liquid outlet pipe, forming a transverse flow channel.

[0047] See the appendix Figure 3 , which is a schematic diagram of the internal structure of the back panel b. Heat dissipation fins b-2 made by shoveling are arranged on the inner wall of the back panel ( Figure 3 only some of the heat dissipation fins are shown in the figure, and the heat dissipation fins are horizontally distributed on the back panel and the front panel), and the arrangement method of the heat dissipation fins b-2 on the back panel b is the same as that of the heat dissipation fins b-2 on the inner wall of the front panel a; after the back panel b and the front panel a are spliced, the heat dissipation fins b-2 on the inner wall of the back panel and the heat dissipation fins b-2 on the inner wall of the front panel a cross each other (that is, each heat dissipation fin b-2 on the inner wall of the back panel is inserted into the gap between each heat dissipation fin b-2 on the inner wall of the front panel a), so as to not only ensure good heat dissipation on both sides of the liquid cooling plate, but also ensure the ultra-thin thickness of the liquid cooling plate.

[0048] Furthermore, see the appendix Figures 4 - 6, the inner wall of the liquid inlet pipe 2 (i.e., the side opposite to the liquid cooling cavity) adopts a stepped surface structure, that is, the inner wall of the liquid inlet pipe 2 includes a first plane a-1 and a second plane a-2, and there is a stepped surface a-3 between the first plane and the second plane, so that the second plane is located outside the first plane. When the front panel a and the back panel b are spliced (welded), the second plane a-2 and the stepped surface a-3 serve as the splicing surface with the back panel b to form a sealed weld. Similarly, the inner wall of the liquid outlet pipe (i.e., the side opposite to the liquid cooling cavity) also adopts the above stepped surface structure.

[0049] The left and right sides of the back panel b have folded plates b-1 for welding with the left and right sides of the front panel a, so that the liquid cooling cavity is formed inside after the front panel and the back panel are spliced (welded).

[0050] Embodiment 2

[0051] The difference between this embodiment and Embodiment 1 is that the number of liquid discharge holes on the liquid outlet pipe is more than one, and can be multiple, and the multiple liquid discharge holes are arranged at intervals along the length direction of the liquid outlet pipe.

[0052] Embodiment 3

[0053] Furthermore, the heat dissipation fins can be wavy.

[0054] For ease of explanation, spatial relative terms such as "upper", "lower", "left", and "right" are used in the embodiments to describe the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations during the use or operation of the device. For example, if the device in the figure is inverted, the element described as being "below" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary term "lower" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0055] Moreover, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply any such actual relationship or order between these components.

[0056] The above has made an exemplary description of the present invention. It should be noted that without departing from the core of the present invention, any simple deformation, modification, or equivalent replacement that can be made by those skilled in the art without creative labor falls within the protection scope of the present invention.

Claims

1. A double-sided heat dissipation liquid cooling plate, characterized in that: It includes a plate-shaped body which is formed by splicing a front panel and a back panel, and a liquid cooling cavity is formed inside. One side of the front panel is provided with an inlet pipe, and the other side opposite thereto is provided with an outlet pipe; one end of the inlet pipe is an inlet port, and a plurality of liquid outlet holes communicating with the inside of the liquid cooling cavity are arranged along the length direction of the inlet pipe, and one end of the outlet pipe is an outlet port. At least two rows of flow disturbing plates are arranged on the inner wall of the front panel or the inner wall of the back panel. The flow disturbing plates are parallel to the inlet pipe or the outlet pipe, and are arranged in the middle area between the inlet pipe and the outlet pipe. A plurality of flow channels are arranged on each row of flow disturbing plates, and the flow channels on adjacent two rows of flow disturbing plates are arranged staggeredly. The inner wall of the front panel is provided with heat dissipation fins formed by milling, and the inner wall of the back panel is also provided with heat dissipation fins formed by milling. The heat dissipation fins on the inner wall of the back panel and the heat dissipation fins on the inner wall of the front panel cross each other. The arrangement mode of the liquid outlet holes on the inlet pipe is as follows: from the inlet port of the inlet pipe to the exhaust port at the other end, the gap between adjacent liquid outlet holes gradually decreases.

2. The double-sided heat dissipation liquid cooling plate according to claim 1, characterized in that: The other end opposite to the inlet port of the inlet pipe is provided with an exhaust port, and a nut is arranged at the exhaust port.

3. The double-sided heat dissipation liquid cooling plate according to claim 1, wherein: The distance between the nearest liquid outlet hole to the inlet port of the inlet pipe and the inlet port of the inlet pipe is 3-4 cm; the distance between the nearest liquid outlet hole to the exhaust port of the inlet pipe and the exhaust port of the inlet pipe is 2-3 cm.

4. The double-sided heat dissipation liquid cooling plate according to claim 1, characterized in that: Each side of the flow disturbing plate includes multiple rows of heat dissipation fins. A certain distance is maintained between each row of heat dissipation fins to form a transverse flow channel. Each heat dissipation fin is longitudinally arranged, and the gap between adjacent two heat dissipation fins forms a longitudinal flow channel. Herein, the longitudinal direction refers to the direction perpendicular to the inlet pipe or the outlet pipe, and the transverse direction refers to the length direction of the inlet pipe or the outlet pipe.

5. The double-sided heat dissipation liquid cooling plate according to claim 1, characterized in that: The number of the liquid discharge holes on the outlet pipe is one, and the liquid discharge hole is arranged at the diagonal position of the inlet port.

6. The double-sided heat dissipation liquid cooling plate according to claim 1, wherein: The inlet port of the inlet pipe and the outlet port of the outlet pipe are arranged on the same side.

7. The double-sided heat dissipation liquid cooling plate according to claim 1, wherein: The inner side wall of the inlet pipe adopts a stepped surface structure, and the inner side wall of the outlet pipe also adopts a stepped surface structure.

8. The double-sided heat dissipation liquid cooling plate according to claim 1, wherein: The left and right sides of the back panel are provided with folding plates for welding with the front panel.

9. The double-sided heat dissipation liquid cooling plate according to claim 1, wherein: The number of the liquid discharge holes on the outlet pipe is multiple, and the multiple liquid discharge holes are arranged at intervals along the length direction of the outlet pipe.

10. The double-sided heat dissipation liquid cooling plate according to claim 1, wherein: There is also a certain gap between the heat dissipation fins above the flow disturbing plate and the flow disturbing plate, forming a transverse flow channel; there is also a certain gap between the heat dissipation fins below the flow disturbing plate and the flow disturbing plate, forming a transverse flow channel; there is also a certain gap between the heat dissipation fins below the inlet pipe and the inlet pipe, forming a transverse flow channel; there is also a certain gap between the heat dissipation fins above the outlet pipe and the outlet pipe, forming a transverse flow channel.

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