Cooling plate

Abstract

The utility model relates to a cooling plate which comprises a liquid inlet main flow channel and at least two heat exchange flow channels, the liquid inlet main flow channel is provided with an inlet, and the heat exchange flow channels are communicated with the liquid inlet main flow channel. The heat exchange runners comprise the first heat exchange runner and the second heat exchange runner, and the first heat exchange runner is close to the inlet relative to the second heat exchange runner. The cooling plate is provided with a first connecting flow channel for connecting the liquid inlet main flow channel and the first heat exchange flow channel, and the extension path length of the first connecting flow channel is L1; the cooling plate is further provided with a second connecting flow channel for connecting the liquid inlet main flow channel and the second heat exchange flow channel, and the extension path length of the second connecting flow channel is L2; l1 and L2 meet the following relation: L1 is greater than L2, and L2 is greater than or equal to 0. In this way, water resistance generated when fluid enters the first heat exchange flow channel and water resistance generated when fluid enters the second heat exchange flow channel can be balanced, and therefore fluid distribution of the heat exchange flow channels is more uniform.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heat management, particularly to a cooling plate for vehicle. BACKGROUND

[0002] The cooling plate is a key component of the heat management system of a pure electric vehicle or a hybrid vehicle, and mainly cools the battery to ensure that the battery can work normally. The battery generates heat during charging and discharging, which increases the temperature inside the battery. As the temperature rises, the performance of the battery itself will greatly decrease, and in severe cases, safety accidents will occur. The cooling plate can remove the heat generated by the battery through the internal circulation of the coolant, thereby reducing the temperature inside the battery.

[0003] The cooling plate has multiple branch flow channels. The closer the branch flow channel is to the inlet and outlet, the smaller its water resistance is. Conversely, the farther the branch flow channel is from the inlet and outlet, the greater its water resistance is. SUMMARY

[0004] Therefore, it is necessary to provide a cooling plate to solve the problem of uneven heat exchange caused by flow resistance.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] The cooling plate comprises a liquid inlet main flow channel and at least two heat exchange flow channels. The liquid inlet main flow channel has an inlet. The heat exchange flow channels are in communication with the liquid inlet main flow channel.

[0007] The heat exchange flow channels comprise a first heat exchange flow channel and a second heat exchange flow channel. The first heat exchange flow channel is closer to the inlet than the second heat exchange flow channel.

[0008] The cooling plate has a first connecting flow channel connecting the liquid inlet main flow channel and the first heat exchange flow channel. The extension path length of the first connecting flow channel is L1. The cooling plate has a second connecting flow channel connecting the liquid inlet main flow channel and the second heat exchange flow channel. The extension path length of the second connecting flow channel is L2. L1 and L2 satisfy the following relationship: L1 > L2, where L2 ≥ 0.

[0009] The extension path length L1 of the first connecting flow channel of the technical scheme of the present application is greater than the extension path length L2 of the second connecting flow channel, so that the water resistance of the fluid in the first connecting flow channel is greater than the water resistance of the fluid in the second connecting flow channel. This can balance the water resistance of the fluid entering the first heat exchange flow channel and the fluid entering the second heat exchange flow channel, making the fluid distribution of the heat exchange flow channels more uniform. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 Structure diagram of the first embodiment of the cooling plate;

[0011] Figure 2 for Figure 1 schematic view of the cross section at A and B;

[0012] Figure 3 schematic view of the structure of a second embodiment of the cooling plate;

[0013] Figure 4 schematic view of the structure of a third embodiment of the cooling plate;

[0014] Figure 5 schematic view of the structure of a fourth embodiment of the cooling plate.

[0015] Reference signs: 1, inlet main flow channel; 2, outlet main flow channel; 3, heat exchange flow channel; 4, inlet; 5, outlet; 6, first heat exchange flow channel; 7, second heat exchange flow channel; 8, first connecting flow channel; 9, second connecting flow channel; 10, first sub connecting flow channel; 11, first region; 12, second region; 13, third connecting flow channel; 14, fourth connecting flow channel; 15, second sub connecting flow channel; 16, third region; 17, fourth region; 18, cooling plate. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical scheme and advantages of the present application more clearly understood, the embodiments will be further described in detail below with reference to the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0017] As Figures 1-2As shown in the figure, the cooling plate 18 comprises at least two pressing plates, and a liquid inlet main flow channel 1, a liquid outlet main flow channel 2 and at least two heat exchange flow channels 3 are arranged between two adjacent pressing plates, wherein the liquid inlet main flow channel 1 has an inlet 4, and the liquid outlet main flow channel 2 has an outlet 5; the liquid inlet main flow channel 1 communicates with the heat exchange flow channel 3, and the liquid outlet main flow channel 2 also communicates with the heat exchange flow channel 3; fluid enters the liquid inlet main flow channel 1, the heat exchange flow channel 3 and the liquid outlet main flow channel 2 in sequence through the inlet 4, and finally flows out from the outlet 5, thereby taking away the heat generated by the heat generating component in contact with the cooling plate 18, so as to reduce the temperature of the heat generating component; the heat exchange flow channel 3 comprises a first heat exchange flow channel 6 and a second heat exchange flow channel 7, and the first heat exchange flow channel 6 is closer to the inlet 4 than the second heat exchange flow channel 7; the cooling plate has a first connecting flow channel 8 connecting the liquid inlet main flow channel 1 and the first heat exchange flow channel 6, and the extension path length of the first connecting flow channel 8 is L1; the cooling plate also has a second connecting flow channel 9 connecting the liquid inlet main flow channel 1 and the second heat exchange flow channel 7, and the extension path length of the second connecting flow channel 9 is L2; L1 and L2 satisfy the following relationship: L1>L2. The extension path length L1 of the first connecting flow channel 8 is greater than the extension path length L2 of the second connecting flow channel 9, the water resistance of the fluid in the first connecting flow channel 8 is greater than the water resistance of the fluid in the second connecting flow channel 9, thereby balancing the water resistance of the fluid entering the first heat exchange flow channel and the fluid entering the second heat exchange flow channel, so that the fluid distribution of the heat exchange flow channel is more uniform. It should be noted that the extension path length L2 of the second connecting flow channel 9 can be 0, at this time, the water resistance of the fluid in the second connecting flow channel 9 is smaller.

[0018] As shown in the figure, Figure 2 The first connecting flow channel 8 comprises at least two first sub-connecting flow channels 10, and the included angle between the extension directions of two adjacent first sub-connecting flow channels 10 is α, and α>0. If the included angle between two flow channels is 0, the water resistance of the fluid passing through the two flow channels is small, and if the included angle between two flow channels is greater than 0, the water resistance of the fluid passing through the two flow channels will increase; the included angle α between the extension directions of two adjacent first sub-connecting flow channels 10 is greater than 0, so that the water resistance of the fluid in the first connecting flow channel 8 can be further increased. In the technical solution, the first connecting flow channel 8 comprises three first sub-connecting flow channels 10, and the included angle between two adjacent first sub-connecting flow channels 10 is 90°, so that the water resistance of the fluid in the first connecting flow channel 8 is larger.

[0019] In the technical solution, the structure of the first connecting flow channel 8 is optimized to increase the water resistance of the fluid in the first connecting flow channel 8, and of course, the structure of the second connecting flow channel 9 can also be optimized to reduce the water resistance of the second connecting flow channel 9. Specifically, the second connecting flow channel 9 extends in a straight line, and the water resistance of the flow channel extending in a straight line is smaller relative to the flow channel extending in a bent structure (i.e., the included angle between the extension directions of two adjacent flow channels is greater than 0). In this way, the water resistance of the fluid in the second connecting flow channel 9 is reduced, and the distribution of the fluid in the heat exchange channel is more uniform.

[0020] The fluid enters the liquid inlet main flow channel 1 through the inlet 4, part of the fluid first passes through the first connecting flow channel 8 to enter the first heat exchange flow channel 6, and another part of the fluid continues to flow in the liquid inlet main flow channel 1 and then passes through the second connecting flow channel 9 to enter the second heat exchange flow channel 7. The flow area of the liquid inlet main flow channel 1 affects the water resistance of the fluid. Specifically, as shown in Figure 4 , the liquid inlet main flow channel 1 includes a first region 11 and a second region 12, the first region 11 is close to the inlet 4, and the second region 12 is away from the inlet 4. The flow area of the first region 11 is S1, and the flow area of the second region 12 is S2. S1 and S2 satisfy the following relationship: S1 < S2. In this way, the water resistance of the fluid close to the inlet 4 in the liquid inlet main flow channel 1 is greater than the water resistance of the fluid away from the inlet 4 in the liquid inlet main flow channel 1. Specifically, as shown in Figures 4-5 , the flow area of the liquid inlet main flow channel 1 gradually increases from the inlet 4 to the end away from the inlet 4. Alternatively, the region close to the inlet 4 of the liquid inlet main flow channel 1 is the first region 11, the flow area of any part of the first region 11 is equal and is S1, and the region away from the inlet 4 of the liquid inlet main flow channel 1 is the second region 12. The flow area of any part of the second region 12 is also equal and is S2, wherein S1 is less than S2.

[0021] In the technical solution, the extension path length of the first connecting flow channel 8, the flow area of the liquid inlet main flow channel 1, and the included angle between the extension directions of two adjacent first sub-connecting flow channels 10 are optimized to increase the water resistance of the fluid close to the inlet 4. In this way, the flow area of the first connecting channel can be adjusted within a larger range without causing welding blockage.

[0022] Further, as shown in Figures 1-2 , the flow area of the first connecting flow channel 8 is smaller than the flow area of the second connecting flow channel 9. In this way, the water resistance of the fluid in the first connecting channel 8 can be increased by reducing the flow area of the first connecting channel 8. It should be noted that although the flow area of the first connecting flow channel 8 is smaller than the flow area of the second connecting flow channel 9, as long as there is no welding blockage during welding.

[0023] The fluid flows out through the heat exchange flow channel, then enters the liquid outlet main flow channel 2, and finally flows out from the outlet 5 of the liquid outlet main flow channel 2. It should be noted that the flow channel design on the outlet 5 side also has an important influence on the water resistance of the fluid. The following describes how to adjust the water resistance of the fluid by optimizing the flow channel design on the outlet 5 side.

[0024] As shown in Figure 1 , the cooling plate has a third connecting flow channel 13 connecting the liquid outlet main flow channel 2 and the first heat exchange channel, and the extension length of the third connecting flow channel 13 is L3; the cooling plate also has a fourth connecting flow channel 14 connecting the liquid outlet main flow channel 2 and the second heat exchange flow channel 7, and the extension length of the fourth connecting flow channel 14 is L4; L3 and L4 satisfy the following relationship: L3>L4; the extension length L3 of the third connecting flow channel 13 is greater than the extension length L4 of the fourth connecting flow channel 14, and the water resistance of the fluid in the third connecting flow channel 13 is greater than the water resistance of the fluid in the fourth connecting flow channel 14. In this way, by increasing the water resistance of the fluid in the third connecting flow channel 13 on the outlet 5 side, the water resistance of the fluid entering the heat exchange flow channel close to the outlet 5 can also be increased. It should be noted that the extension length L4 of the fourth connecting flow channel 14 can also be 0, in which case the water resistance of the fluid in the fourth connecting flow channel 14 is small.

[0025] As shown in Figure 2 , the third connecting flow channel 13 includes at least two second sub-connecting flow channels 15, and the included angle between the extension directions of two adjacent second sub-connecting flow channels 15 is β, and β>0. If the included angle between two flow channels is greater than 0, the water resistance of the fluid passing through the two flow channels will increase; the included angle β between the extension directions of two adjacent second sub-connecting flow channels 15 is greater than 0, so that the water resistance of the fluid in the third connecting flow channel 13 can be further increased. In the technical solution, the third connecting flow channel 13 includes three second sub-connecting flow channels 15, and there is an included angle between two adjacent second sub-connecting flow channels 15, and the included angle is 90°, and the water resistance is large.

[0026] As shown in Figure 2 , the fourth connecting flow channel 14 extends in a straight line. The water resistance of the flow channel extending in a straight line is small, so that the water resistance of the fluid in the fourth connecting flow channel 14 is reduced, and the water resistance of the fluid entering the heat exchange flow channel far away from the outlet 5 is further reduced, so that the fluid is more easily enters the heat exchange flow channel far away from the outlet 5, thereby improving the fluid distribution of the heat exchange flow channel.

[0027] As shown in Figure 4As shown, the cross-sectional area of ​​the main outlet channel 2 also affects the water resistance of the fluid. The main outlet channel 2 includes a third region 16 and a fourth region 17. The third region 16 is connected to the first heat exchange channel 6, and the fourth region 17 is connected to the second heat exchange channel. The cross-sectional area of ​​the third region 16 is S3, and the cross-sectional area of ​​the fourth region 17 is S4. S3 and S4 satisfy the following relationship: S3 < S4. Thus, the water resistance of the fluid in the third region 16 of the main outlet channel 2 is greater than that of the fluid in the fourth region 17 of the main outlet channel 2, which can further increase the water resistance of the fluid entering the heat exchange channel near the outlet 5.

[0028] In the above technical solution, by optimizing the extension path length of the third connecting channel 13, the flow cross-sectional area of ​​the main liquid outlet channel 2, and the included angle of the extension directions of the two adjacent second sub-connecting channels 15, the water resistance of the fluid in the third connecting channel 13 is improved. In this way, the flow cross-sectional area of ​​the third connecting channel can be adjusted within a large range without the risk of weld blockage.

[0029] like Figures 1-2 As shown, the flow cross-sectional area of ​​the third connecting channel 13 is smaller than that of the fourth connecting channel 14. Thus, by reducing the flow cross-sectional area of ​​the third connecting channel 13, the water resistance within the third connecting channel 13 is increased, thereby increasing the water resistance of the fluid flowing out of the first heat exchange channel 6. It should be noted that although the flow cross-sectional area of ​​the third connecting channel 13 is smaller than that of the fourth connecting channel 14, this is acceptable as long as no weld blockage occurs during welding.

[0030] In this technical solution, the flow channel structure on the four sides of the inlet can be optimized, such as... Figure 3 As shown; the water resistance of the fluid can also be adjusted by optimizing the flow channel structure on the outlet 5 side; or by simultaneously optimizing the flow channel structures on the inlet 4 side and the outlet 5 side, such as... Figure 1 As shown, as long as the fluid distribution in each heat exchange channel can be improved, the consistency of heat exchange in each heat exchange channel within the cooling plate 18 can be ensured.

[0031] The technical features of the above-described technical solutions can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above-described technical solutions are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The above-described technical solutions only illustrate several embodiments of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications without departing from the concept of this utility model, and these modifications all fall within the protection scope of this utility model.

Claims

1. Cooling plate, characterized in that The cooling plate comprises a liquid inlet main flow channel (1) having an inlet (4) and at least two heat exchange flow channels (3) communicating with the liquid inlet main flow channel (1); The heat exchange flow channels (3) comprise a first heat exchange flow channel (6) and a second heat exchange flow channel (7), and the first heat exchange flow channel (6) is closer to the inlet (4) than the second heat exchange flow channel (7); The cooling plate has a first connecting flow channel (8) connecting the liquid inlet main flow channel (1) and the first heat exchange flow channel (6), and the first connecting flow channel (8) has an extension path length L1; the cooling plate has a second connecting flow channel (9) connecting the liquid inlet main flow channel (1) and the second heat exchange flow channel (7), and the second connecting flow channel (9) has an extension path length L2; L1 and L2 satisfy the following relationship: L1>L2, wherein L2≥0.

2. Cooling plate according to claim 1, characterized in that The first connecting flow channel (8) comprises at least two first sub-connecting flow channels (10), and the included angle between the extension directions of two adjacent first sub-connecting flow channels (10) is α, and α>0.

3. Cooling plate according to claim 1 or 2, characterized in that The second connecting flow channel (9) extends in a straight line.

4. Cooling plate according to claim 3, characterized in that The liquid inlet main flow channel (1) comprises a first region (11) and a second region (12), the first region (11) is close to the inlet (4), and the second region (12) is away from the inlet (4); the flow passage cross-sectional area of at least part of the first region (11) is S1, the flow passage cross-sectional area of at least part of the second region (12) is S2, and S1 and S2 satisfy the following relationship: S1<S2.

5. Cooling plate according to any of claims 1-2 and 4, characterized in that The flow passage cross-sectional area of the first connecting flow channel (8) is smaller than that of the second connecting flow channel (9).

6. The cooling plate according to any one of claims 1 to 2 and 4, characterized by The cooling plate (18) further comprises a liquid outlet main flow channel (2); the cooling plate (18) has a third connecting flow channel (13) connecting the liquid outlet main flow channel (2) and the first heat exchange flow channel (6), and the cooling plate (18) further has a fourth connecting flow channel (14) connecting the liquid outlet main flow channel (2) and the second heat exchange flow channel (7); the third connecting flow channel (13) has an extension path length L3; the fourth connecting flow channel (14) has an extension path length L4; L3 and L4 satisfy the following relationship: L3>L4, wherein L4≥0.

7. The cooling plate according to claim 6, characterized in that The third connecting flow channel (13) comprises at least two second sub-connecting flow channels (15), and the included angle between the extension directions of two adjacent second sub-connecting flow channels (15) is β, and β>0.

8. The cooling plate according to claim 7, characterized in that The fourth connecting flow channel (14) extends in a straight line.

9. Cooling plate according to claim 7 or 8, characterized in that The liquid outlet main flow channel (2) comprises a third region (16) and a fourth region (17), the third region (16) is connected with the first heat exchange flow channel (6), and the fourth region (17) is connected with the second heat exchange flow channel (7); the flow passage cross-sectional area of at least part of the third region (16) is S3, the flow passage cross-sectional area of at least part of the fourth region (17) is S4, and S3 and S4 satisfy the following relationship: S3<S4.

10. Cooling plate according to claim 9, characterized in that The flow passage cross-sectional area of the third connecting flow channel (13) is smaller than that of the fourth connecting flow channel (14).

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