A liquid cooling plate

Abstract

The present invention discloses a liquid cooling plate, comprising a plate-like body, a liquid cooling cavity inside the plate-like body, a liquid inlet pipe and a liquid outlet pipe are respectively arranged on the upper and lower sides of the plate-like body, one end of the liquid inlet pipe is a liquid inlet, a plurality of liquid outlet holes connected to the liquid cooling cavity are arranged on the liquid inlet pipe along its length direction, one end of the liquid outlet pipe is a liquid outlet, at least two rows of spoilers are arranged in the liquid cooling cavity, the spoilers are arranged in the middle area between the liquid inlet pipe and the liquid outlet pipe, and heat dissipation fins are arranged inside the liquid cooling cavity, the heat dissipation fins are shoveled from the inner wall of the plate-like body, and the heat dissipation fins are distributed on both sides of the spoilers, and the external heat is transferred to the liquid cooling cavity through the plate-like body and the heat dissipation fins on the inner wall of the plate-like body, and then the heat is taken away by the circulating coolant inside the liquid cooling cavity. The liquid cooling plate of the present invention improves the sufficient fluidity and heat conductivity and heat dissipation of the coolant inside the liquid cooling cavity.

Description

Technical Field

[0001] The present invention belongs to the technical field of battery cooling devices, and in particular relates to a liquid cooling plate for a power battery. Background Art

[0002] Driven by the energy and environmental crisis, governments and automobile companies around the world have invested a lot of energy in developing electric vehicles to reduce dependence on fossil energy and reduce emissions. Electric vehicles use on-board chemical energy storage systems to provide electricity, and the performance and quality of these vehicles are also largely dependent on the battery system they are equipped with. The rise in battery temperature will affect the life and stability of the battery cell. High temperature will accelerate the consumption of electrolytes, the aging of electrodes and separators, and the aging rate of battery cells at high temperatures will be significantly faster than that at low temperatures.

[0003] At present, liquid cooling is the mainstream liquid cooling system in the selection of battery liquid cooling systems in new energy vehicles. Compared with air cooling, liquid cooling has high efficiency and saves space. The traditional power battery liquid cooling plate is a structure in which a heat dissipation flat tube is welded on the lower part of the upper plane or a heat dissipation flat tube is welded between the upper and lower planes. This tube structure liquid cooling plate is easy to produce, but the cost is high, the flow channel is long, the heat dissipation uniformity is average (the longer the flow channel, the higher the temperature accumulated in the later part of the flow channel), the heat transfer and heat dissipation effect is average, and a reinforced 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 liquid cooling plate.

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

[0006] A liquid cooling plate comprises a plate-shaped body, wherein the plate-shaped body has a liquid cooling cavity inside, a liquid inlet pipe is arranged on one side of the plate-shaped body, and a liquid outlet pipe is arranged on the other side opposite thereto;

[0007] One end of the liquid inlet pipe is a liquid inlet, and a plurality of liquid outlet holes communicating with the interior of the liquid cooling chamber are arranged on the liquid inlet pipe along its length direction, and one end of the liquid outlet pipe is a liquid outlet;

[0008] At least two rows of spoilers are arranged in the liquid cooling chamber, the spoilers are parallel to the liquid inlet pipe or the liquid outlet pipe, the spoilers are arranged in the middle area between the liquid inlet pipe and the liquid outlet pipe, each row of spoilers is provided with a plurality of flow channel holes, and the flow channel holes on two adjacent rows of spoilers are arranged in a staggered manner;

[0009] The liquid cooling cavity is provided with heat dissipation fins, which are shoveled from the inner wall of the plate-like body. The heat dissipation fins are distributed on both sides of the spoiler. The external heat is transferred to the liquid cooling cavity through the plate-like body and the heat dissipation fins on the inner wall of the plate-like body, and then the heat is taken away by the circulating coolant in the liquid cooling cavity.

[0010] The arrangement 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 gaps between adjacent liquid outlet holes gradually decrease.

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

[0012] In the above technical solution, 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 is 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 is 2-3 cm.

[0013] In the above technical solution, each side of the spoiler includes multiple rows of cooling fins, and a certain distance is maintained between each row of cooling fins to form a transverse flow channel. Each cooling fin is arranged longitudinally, and the gap between two adjacent cooling fins forms a longitudinal flow channel, wherein 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 hole on the liquid outlet pipe is one, and the liquid discharge hole is arranged at a diagonally opposite position to 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 plate-like body is formed by splicing a front panel and a back panel, and the heat dissipation fins are arranged on the inner wall of the front panel; the liquid inlet pipe and the liquid outlet pipe are respectively arranged on the upper and lower sides of the front panel.

[0017] 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.

[0018] In the above technical solution, the left and right sides of the back panel are provided with folding plates for welding with the front panel, so that the liquid cooling cavity is formed inside after the front panel and the back panel are spliced.

[0019] In the above technical solution, there are multiple drainage holes on the liquid outlet pipe, and the multiple drainage holes are arranged at intervals along the length of the liquid outlet pipe.

[0020] In the above technical scheme, the heat dissipation fins on the upper side of the spoiler also have a certain gap from the spoiler, forming a transverse flow channel; the heat dissipation fins on the lower side of the spoiler also have a certain gap from the spoiler, forming a transverse flow channel; the heat dissipation fins on the lower side of the liquid inlet pipe also have a certain gap from the liquid inlet pipe, forming a transverse flow channel; the heat dissipation fins on the upper side of the liquid outlet pipe also have a certain gap from the liquid outlet pipe, forming a transverse flow channel.

[0021] The advantages and beneficial effects of the present invention are:

[0022] 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 present invention greatly increases the heat dissipation area and improves the heat exchange efficiency. In addition, the heat dissipation fins are shoveled on the liquid cooling plate body, which completely eliminates the contact thermal resistance and greatly improves the heat dissipation performance.

[0023] 2. Multiple liquid outlet holes connected to the inside of the liquid cooling chamber are arranged on the liquid inlet pipe along its length direction. The arrangement 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. This can make the liquid output at various locations along the length direction of the liquid inlet pipe as balanced as possible, so that the liquid inside the liquid cooling chamber can flow fully and improve the heat exchange efficiency.

[0024] 3. A spoiler is arranged in the liquid cooling chamber, and the spoiler 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 spoiler, each side includes multiple rows of heat dissipation fins, and each row of heat dissipation fins maintains a certain distance between each other to form a transverse flow channel, and each heat dissipation fin is arranged longitudinally, and the gap between two adjacent heat dissipation fins forms a longitudinal flow channel. Such an arrangement can fully increase the transverse and longitudinal fluidity of the liquid in the liquid cooling chamber, and because the spoiler is located in the middle area between the liquid inlet pipe and the liquid outlet pipe (i.e., on the longitudinal midline of the entire liquid cooling chamber), the spoiler can form a secondary acceleration disturbance of the liquid in the middle area under the action of the spoiler, thereby enhancing the fluidity of the liquid on both sides of the spoiler.

[0025] 4. The plate-shaped body is formed by splicing (welding) the front panel and the back panel, forming a liquid cooling cavity inside, and the heat dissipation fins are shoveled on the inner wall of the front panel. The liquid inlet pipe and the liquid outlet pipe are respectively arranged on the upper and lower sides of the front panel. Its structure is simple, easy to produce and easy to assemble. In addition, the inner side wall of the liquid inlet pipe and the inner wall of the liquid outlet pipe both adopt a stepped surface structure, which can form a good surface contact with both sides of the back panel and enhance the welding sealing.

[0026] 5. Compared with the traditional tubular liquid cooling plate, the interior of the liquid cooling plate of the present invention is an integrated liquid cooling cavity, and the liquid can flow in the entire liquid cooling cavity, avoiding the disadvantage of a single serpentine tube flow channel being too long.

[0027] In summary, the liquid cooling plate of the present invention, under the synergistic effect of the above-mentioned factors, improves the sufficient fluidity and thermal conductivity and heat dissipation of the cooling liquid in the liquid cooling cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an appearance diagram of the liquid cooling plate of the present invention.

[0029] Figure 2 It is a schematic diagram of the internal structure of the liquid cooling plate of the present invention.

[0030] Figure 3 It is a structural schematic diagram of the front panel and the back panel of the liquid cooling plate of the present invention when they are spliced.

[0031] Figure 4 It is a cross-sectional view of the front panel and the back panel of the liquid cooling plate of the present invention after being spliced.

[0032] Figure 5 It is a partial enlarged schematic diagram of the liquid inlet pipe of the liquid cooling plate of the present invention.

[0033] in:

[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 spoilers, 5: second row of spoilers, 6: cooling fins, a: front panel, b: back panel, a-1: first plane, a-2: second plane, a-3: stepped surface.

[0035] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

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

[0037] Embodiment 1

[0038] A liquid cooling plate comprises a plate-shaped body 1, the plate-shaped body is square, a liquid cooling cavity is provided inside the plate-shaped body, and one side of the plate-shaped body ( Figure 1 A liquid inlet pipe 2 is provided on the middle upper side, and the other side opposite to it ( Figure 1 A liquid outlet pipe 3 is provided on the middle and lower side, and the coolant enters the liquid cooling chamber from the liquid inlet pipe and is discharged from the liquid outlet pipe to cool down the temperature.

[0039] See attached Figure 2, is a schematic diagram of the structure inside the liquid cooling plate. One end of the liquid inlet pipe 2 is the liquid inlet 2-1, and the other end is the exhaust port 2-2. The liquid inlet adopts a quick interface structure to facilitate quick connection with the external pipeline. The exhaust port 2-2 is provided with a nut 2-3. When necessary, the nut 2-3 is adjusted to vent. A plurality of liquid outlet holes 2-4 connected to the inside of the liquid cooling cavity are provided on the liquid inlet pipe 2 along its length direction to allow the coolant to enter the liquid cooling cavity. One end of the liquid outlet pipe 3 is the liquid outlet 3-1. The liquid outlet adopts a quick interface structure to facilitate quick connection with the external pipeline. The liquid outlet pipe is provided with a drainage hole 3-2 connected to the liquid cooling cavity, which is used to introduce the liquid inside the liquid cooling cavity into the liquid outlet pipe and discharge it from the liquid outlet 3-1 along the liquid outlet pipe.

[0040] Two rows of spoilers are arranged in the liquid cooling chamber. The spoilers are parallel to the liquid inlet pipe or the liquid outlet pipe. The spoilers are arranged in the middle area between the liquid inlet pipe and the liquid outlet pipe. A plurality of flow channel holes are arranged on each row of spoilers, and the flow channel holes 4-1 on the first row of spoilers 4 and the flow channel holes 5-1 on the second row of spoilers 5 are arranged alternately to achieve flow disturbance of the liquid in the liquid cooling chamber and enhance fluidity.

[0041] The liquid cooling chamber is provided with heat dissipation fins 6 ( Figure 2 Only some of the heat dissipation fins are shown in the figure. The heat dissipation fins 6 are shoveled from the inner wall of the plate-like body. The external heat is transferred to the inside of the liquid cooling chamber through the plate-like body and the heat dissipation fins on the inner wall of the plate-like body, and then the heat is taken away by the circulating coolant inside the liquid cooling chamber. The heat dissipation fins are distributed on both sides of the spoiler, and each side preferably includes two rows of heat dissipation fins. A certain distance is maintained between the two rows of heat dissipation fins to form a transverse flow channel. Each heat dissipation fin is arranged longitudinally, and the gap between two adjacent 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.

[0042] Furthermore, the arrangement of the liquid outlet holes 2-4 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 gap between adjacent liquid outlet holes gradually decreases, that is, 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 effect 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 output of the liquid outlet holes is also getting smaller and smaller from the liquid inlet to the exhaust port, resulting in an unbalanced liquid flow in the liquid cooling chamber, affecting the heat exchange efficiency. Therefore, the arrangement of the liquid outlet holes of the present invention can make the liquid output at various locations along the length direction of the liquid inlet pipe as balanced as possible, so that the liquid inside the liquid cooling chamber can flow fully and improve the heat exchange efficiency. 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.

[0043] Furthermore, the number of the drainage hole 3-2 on the liquid outlet pipe is one, and the drainage hole is arranged at a diagonal position of the liquid inlet.

[0044] 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.

[0045] Furthermore, the heat dissipation fins on the upper side of the spoiler are also separated from the spoiler at a certain distance, forming a transverse flow channel; the heat dissipation fins on the lower side of the spoiler are also separated from the spoiler at a certain distance, forming a transverse flow channel; the heat dissipation fins on the lower side of the liquid inlet pipe are also separated from the liquid inlet pipe at a certain distance, forming a transverse flow channel; the heat dissipation fins on the upper side of the liquid outlet pipe are also separated from the liquid outlet pipe at a certain distance, forming a transverse flow channel.

[0046] Embodiment 2

[0047] See attached Figure 3-5 The plate-shaped body is formed by splicing (welding) a front panel a and a back panel b, and the heat dissipation fins 6 are arranged on the inner wall of the front panel a and are shoveled on the inner wall of the front panel. The liquid inlet pipe and the liquid outlet pipe are respectively arranged on the upper and lower sides of the front panel.

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

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

[0050] Embodiment 3

[0051] The difference between this embodiment and the first embodiment is that the number of the 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 of the liquid outlet pipe.

[0052] Embodiment 4

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

[0054] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate 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 of the device in use or operation. For example, if the device in the figure is inverted, the elements described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" 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] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0056] The present invention is described above by way of example. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by those skilled in the art without inventive effort falls within the protection scope of the present invention.

Claims

1. A liquid cooling plate, characterized in that: It comprises a plate-like body, wherein the plate-like body has a liquid cooling cavity inside, a liquid inlet pipe is arranged on one side of the plate-like body, and a liquid outlet pipe is arranged on the other side opposite thereto; One end of the liquid inlet pipe is a liquid inlet, and a plurality of liquid outlet holes communicating with the interior of the liquid cooling chamber are arranged on the liquid inlet pipe along its length direction, and one end of the liquid outlet pipe is a liquid outlet; At least two rows of spoilers are arranged in the liquid cooling chamber, the spoilers are parallel to the liquid inlet pipe or the liquid outlet pipe, the spoilers are arranged in the middle area between the liquid inlet pipe and the liquid outlet pipe, each row of spoilers is provided with a plurality of flow channel holes, and the flow channel holes on two adjacent rows of spoilers are arranged in a staggered manner; The liquid cooling cavity is provided with heat dissipation fins, which are shoveled from the inner wall of the plate-like body. The heat dissipation fins are distributed on both sides of the spoiler. The external heat is transferred to the liquid cooling cavity through the plate-like body and the heat dissipation fins on the inner wall of the plate-like body, and then the heat is taken away by the circulating coolant in the liquid cooling cavity. The arrangement 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 gap between adjacent liquid outlet holes gradually decreases; An exhaust port is arranged at the other end of the liquid inlet of the liquid inlet pipe opposite to the liquid inlet, and a nut is arranged at the exhaust port; the liquid inlet of the liquid inlet pipe and the liquid outlet of the liquid outlet pipe are arranged on the same side.

2. The liquid cooling plate according to claim 1, characterized in that: 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 is 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 is 2-3 cm.

3. The liquid cooling plate according to claim 1, characterized in that: Each side of the spoiler includes multiple rows of cooling fins, and a certain distance is maintained between each row of cooling fins to form a transverse flow channel. Each cooling fin is arranged longitudinally, and the gap between two adjacent cooling fins forms a longitudinal flow channel, wherein 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.

4. The liquid cooling plate according to claim 1, characterized in that: The number of the liquid discharge hole on the liquid outlet pipe is one, and the liquid discharge hole is arranged at a diagonally opposite position to the liquid inlet.

5. The liquid cooling plate according to claim 1, characterized in that: The plate-shaped body is formed by splicing a front panel and a back panel. The heat dissipation fins are arranged on the inner wall of the front panel. The liquid inlet pipe and the liquid outlet pipe are respectively arranged on the upper and lower sides of the front panel.

6. The liquid cooling plate according to claim 1, characterized in that: 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.

7. The liquid cooling plate according to claim 1, characterized in that: The left and right sides of the back panel are provided with folding plates for welding with the front panel, so that the liquid cooling cavity is formed inside after the front panel and the back panel are spliced.

8. The liquid cooling plate according to claim 1, characterized in that: There are a plurality of drainage holes on the liquid outlet pipe, and the plurality of drainage holes are arranged at intervals along the length of the liquid outlet pipe.

Images