Liquid cooling plate

Abstract

The utility model belongs to the field of heat dissipation technology, concretely relates to a liquid cooling plate, it includes the plate body, sets up the liquid inlet hole and the liquid outlet hole at plate body, and forms the cooling flow channel in the plate body inside, and cooling flow channel includes: first cooling flow channel group, it communicates with liquid inlet hole, includes two groups first cooling flow channel interval arrangement along X direction, every group first cooling flow channel all along X direction presents S shape circuitously extended, second cooling flow channel group, it communicates with first cooling flow channel group and liquid outlet hole, including at least three groups second cooling flow channel interval arrangement along X direction, every group second cooling flow channel all along Y direction presents S shape circuitously extended. The flow channel structure will be cooling path design as S shape in different directions, both avoid the problem that flow resistance is too big caused by single path is too long, and realize the effective use of kinetic energy through the optimization of flow channel layout, thereby balanced flow distribution and flow speed in different areas, satisfy the demand of efficient and uniform heat dissipation.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology, and in particular to a liquid cooling plate. Background Technology

[0002] With the continuous improvement of energy density and charge / discharge rate of power battery packs, heat management during operation has become a key issue affecting battery performance, safety, and lifespan. Liquid cooling plates, with their high thermal conductivity and compact structure, are widely used in the thermal management systems of battery packs.

[0003] Traditional liquid cooling plates typically employ simple direct-flow or serpentine flow channel designs. While direct-flow channels offer lower flow resistance, the coolant's residence time within the plate is short, resulting in insufficient heat exchange with the heat dissipation surface. This can easily lead to significant temperature differences between individual battery cells or modules, affecting the overall performance and consistency of the battery pack. Serpentine flow channels, although extending the coolant path and increasing heat exchange time, have a unidirectional flow direction. When covering a rectangular battery area, the difference in channel length between the long and short sides is significant. This causes excessive temperature rise in the long channels and insufficient cooling due to excessively high flow velocity in the short channels, similarly failing to guarantee effective heat dissipation at the battery contact surface, thus impacting battery life and safety.

[0004] Therefore, there is an urgent need for a new type of liquid cooling plate structure that can achieve efficient and uniform heat dissipation. Utility Model Content

[0005] Based on this, the present invention provides a novel liquid cooling plate that can achieve efficient and uniform heat dissipation.

[0006] A liquid-cooled plate according to an embodiment of the present invention includes a plate body, a liquid inlet hole and a liquid outlet hole disposed on the plate body, and a cooling channel formed inside the plate body, characterized in that the cooling channel includes: The first cooling channel group, which is connected to the liquid inlet hole, includes two groups of first cooling channels arranged at intervals along the X direction, and each group of first cooling channels extends in an S-shaped meandering manner along the X direction. The second cooling channel group, which is connected to the first cooling channel group and the liquid outlet, includes at least three groups of second cooling channels arranged at intervals along the X direction, and each group of second cooling channels extends in an S-shaped meandering manner along the Y direction.

[0007] In some embodiments, the region between the two sets of the first cooling channels forms a first inlet, and each set of the first cooling channels has a first outlet on both sides along the X direction.

[0008] In some embodiments, each group of the first cooling channels is formed by a first sub-channel and a second sub-channel arranged in parallel, forming an S-shaped path through continuous bends.

[0009] In some embodiments, each group of second cooling channels is provided with a second inlet on the side of the first cooling channel group along the Y direction close to the side of the first cooling channel group, and each group of second cooling channels is provided with a second outlet on the side of the first cooling channel group away from the Y direction.

[0010] In some embodiments, each group of second cooling channels includes a symmetrically arranged third sub-channel and a fourth sub-channel, wherein the S-shaped path of the third sub-channel detours towards one side in the X direction, and the path of the fourth sub-channel detours towards the other side in the X direction.

[0011] In some embodiments, the cross-sectional area of ​​the two sub-channels in the first cooling channel is greater than the cross-sectional area of ​​the two sub-channels in the second cooling channel.

[0012] In some embodiments, the first sub-channel, the second sub-channel, the third sub-channel, and the fourth sub-channel have the same width, and the depth of the first sub-channel and the second sub-channel is less than the depth of the third sub-channel and the fourth sub-channel.

[0013] In some embodiments, the liquid cooling plate further includes an inlet channel, an outlet channel, and a collection channel. The inlet end of the inlet channel is connected to the liquid inlet hole, and the outlet end of the inlet channel is located between the two sets of the first cooling channels and is connected to the first inlet. The inlet end of the water outlet channel is connected to the second outlet, and the outlet end of the water outlet channel is connected to the liquid outlet hole; The flow channel connects both the first outlet and the second inlet.

[0014] In some embodiments, the liquid inlet and the liquid outlet are both located on the same side of the liquid cooling plate.

[0015] In some embodiments, the liquid inlet and the liquid outlet are disposed on the short side of the liquid cooling plate on one side in the X direction.

[0016] The liquid-cooled plate of this invention includes a first cooling channel group in the X direction and a second cooling channel group in the Y direction. This channel structure designs the cooling path as an S-shape in different directions, avoiding excessive flow resistance caused by an excessively long single path, and achieving efficient utilization of kinetic energy through optimized channel layout. When the coolant flows into the liquid-cooled plate from the inlet, it has high initial kinetic energy. At this point, the coolant flows through the longer first cooling channel in the X direction, and after its kinetic energy decreases, it flows through the shorter second cooling channel in the Y direction. This balances the flow rate and velocity in different areas, meeting the requirements for efficient and uniform heat dissipation. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the flow channel structure of the liquid cooling plate according to one embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the first cooling channel in one embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the second cooling channel in one embodiment of the present invention.

[0018] In the diagram: Plate 10; Liquid inlet 11; Liquid outlet 12; Water inlet channel 20; First cooling channel group 30; First cooling channel 31; First inlet 32; First outlet 33; First sub-channel 34; Second sub-channel 35; Collector channel 40; Second cooling channel group 50; Second cooling channel 51; Second inlet 52; Second outlet 53; Third sub-channel 54; Fourth sub-channel 55; Water outlet channel 60. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0021] The orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "middle," "longitudinal," "transverse," "horizontal," "inner," "outer," "radial," and "circumferential" used in this specification are based on the orientations or positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0022] like Figure 1 As shown, this embodiment provides a liquid cooling plate, which includes a plate body 10, a liquid inlet hole 11 and a liquid outlet hole 12 disposed on the plate body 10, and cooling channels formed inside the plate body 10. The cooling channels include a first cooling channel group 30 disposed near the liquid inlet hole 11 and a second cooling channel group 50 disposed near the liquid outlet hole 12.

[0023] See details Figure 2 The first cooling channel group 30 includes two sets of first cooling channels 31 arranged at intervals along the X direction (long side direction), each set of first cooling channels 31 extending in an S-shape along the X direction. The area between the two sets of first cooling channels 31 forms a first inlet 32. After the coolant is introduced through the inlet hole 11, it is diverted to the two sets of first cooling channels 31 through the corresponding first inlet 32, and flows towards both sides in the X direction. After reaching the end of the channel, it turns back to the central area, thus forming an S-shaped path. Each set of first cooling channels 31 has a first outlet 33 on both sides along the X direction. In the first cooling channel group 30 formed by the two sets of first cooling channels 31, the first outlets 33 are distributed on both sides and in the middle area of ​​the entire first cooling channel group 30, so as to facilitate the uniform flow of coolant out of the first cooling channel group 30.

[0024] See details Figure 3 The second cooling channel group 50 is located downstream of the first cooling channel group 30 and includes at least three groups of second cooling channels 51 arranged at intervals along the X direction. Each group of second cooling channels 51 extends in an S-shape along the Y direction (short side direction). Each group of second cooling channels 51 has a second inlet 52 on the side of the Y direction closer to the first cooling channel group 30, and a second outlet 53 on the side of the Y direction away from the first cooling channel group 30. The coolant flowing out of the first cooling channel group 30 is diverted to the second inlet 52 of each second cooling channel 51, and then flows along the Y direction away from the first cooling channel group 30 within each group of second cooling channels 51. After reaching the end of the channel, it turns back, thus forming an S-shaped path. It should be noted that the number of second cooling channels 51 is set according to requirements, with at least three sets of second cooling channels 51, so that the coolant from the first outlet 33 on both sides and in the middle area of ​​the entire first cooling channel group 30 can flow evenly into the second cooling channels 51. The specific number of second cooling channels 51 will not be described in this embodiment.

[0025] The liquid cooling plate in this embodiment includes a first cooling channel group 30 in the X direction and a second cooling channel group 50 in the Y direction. This channel structure designs the cooling path as an S-shape in different directions, avoiding excessive flow resistance caused by an excessively long single path, and achieving efficient utilization of kinetic energy through optimized channel layout. When the coolant flows into the liquid cooling plate from the inlet hole 11, it has high initial kinetic energy. At this point, the coolant flows through the longer X-direction first cooling channel 31, and after its kinetic energy decreases, it flows through the shorter Y-direction second cooling channel 51. This balances the flow rate and velocity in different areas, meeting the requirements for efficient and uniform heat dissipation.

[0026] In the first cooling channel group 30 of this embodiment, each first cooling channel 31 preferably consists of a first sub-channel 34 and a second sub-channel 35 arranged in parallel, forming a complete S-shaped path through continuous bends. That is, when the coolant in the first cooling channel 31 flows from the starting end to the end along the X direction and makes its first turn, the coolant in the first sub-channel 34 completes the first turn with a small radius arc, while the coolant in the second sub-channel 35 completes the first turn with a large radius arc. When the coolant flows back to the starting end and makes its second turn, the first sub-channel 34 completes the second turn with a large radius arc, while the coolant in the second sub-channel 35 completes the second turn with a small radius arc. The first sub-channel 34 and the second sub-channel 35 respectively form first outlets 33 on both sides of the first cooling channel 31. This channel design, with alternating large and small radius arcs, effectively balances the flow resistance and velocity distribution within the parallel channels, reduces dead zones, and thus significantly improves heat dissipation uniformity and overall efficiency.

[0027] In the second cooling channel group 50 of this embodiment, each group of second cooling channels 51 preferably adopts a symmetrical flow-dividing structure, specifically including a symmetrically arranged third sub-channel 54 and a fourth sub-channel 55. The coolant flows in from the second inlet 52 and is then distributed into these two sub-channels. The S-shaped path of the third sub-channel 54 detours towards one side of the X direction, while the path of the fourth sub-channel 55 detours towards the other side of the X direction. They are symmetrically arranged in space. That is, when the coolant flows from the starting end to the end along the Y direction and makes its first turn, the coolant in the third sub-channel 54 always turns towards its designated X direction, while the coolant in the fourth sub-channel 55 always turns towards its designated X direction. In all subsequent turns, the two sub-channels maintain their inherent turning directions. Finally, after flowing through the complete S-shaped path, the coolant in both sub-channels flows out at the second outlet 53. This symmetrical flow-dividing design effectively balances the flow resistance and flow rate within the second cooling channel 51.

[0028] In this embodiment, the cross-sectional area of ​​the two sub-channels in the first cooling channel 31 is preferably larger than that of the two sub-channels in the second cooling channel 51. Because the two sub-channels in the first cooling channel 31 are arranged relatively sparsely, while the two sub-channels in the second cooling channel 51 are arranged relatively densely, the difference in cross-sectional area can improve the balance of flow resistance between the two channels.

[0029] Specifically, the first sub-channel 34 and the second sub-channel 35 in the first cooling channel 31 have the same width and depth, and the third sub-channel 54 and the fourth sub-channel 55 in the second coolant channel have the same width and depth. The first sub-channel 34, the second sub-channel 35, the third sub-channel 54, and the fourth sub-channel 55 have the same width, but the depth of the first sub-channel 34 and the second sub-channel 35 is less than the depth of the third sub-channel 54 and the fourth sub-channel 55. With the four sub-channels having the same width, the first sub-channel 34 and the second sub-channel 35 are designed to be deeper, while the third sub-channel 54 and the fourth sub-channel 55 are designed to be shallower, so that the cross-sectional area of ​​two sub-channels in the first cooling channel 31 is larger than that of two sub-channels in the second cooling channel 51. It should be noted that some embodiments can also set different width and depth dimensions as needed to change the cross-sectional area of ​​different sub-channels.

[0030] The cooling channel in this embodiment also includes a water inlet channel 20. The water inlet end of the water inlet channel 20 is connected to the liquid inlet hole 11. The water outlet end of the water inlet channel 20 is located between the two sets of first cooling channels 31 and is connected to the first inlet 32 ​​of the first cooling channel 31. The water inlet channel 20 is used to transport coolant to the first cooling channel 31.

[0031] The cooling channel in this embodiment also includes a water outlet channel 60. The water inlet of the water outlet channel 60 is connected to the second outlet 53 of the second cooling channel 51, and the water outlet of the water outlet channel 60 is connected to the liquid outlet hole 12. The water outlet channel 60 is used to guide the coolant in the second cooling channel 51 to flow out of the liquid cooling plate.

[0032] The cooling channel in this embodiment also includes a collecting channel 40 located between the first cooling channel group 30 and the second cooling channel group 50. The collecting channel 40 is connected to the first outlet 33 of the first cooling channel 31 and the second inlet 52 of the second cooling channel 51. The coolant in the first channel flows into the collecting channel 40 and then flows into the second cooling channel 51. The method of first converging and then distributing the coolant between the first channel and the second channel can ensure that the coolant enters the second channel smoothly and evenly.

[0033] In this embodiment, the liquid inlet 11 and liquid outlet 12 are both centrally located on the same side of the liquid cooling plate. Preferably, the liquid inlet 11 and liquid outlet 12 are specifically located on the short side of the liquid cooling plate on one side in the X direction. The structure of arranging the liquid inlet 11 and liquid outlet 12 side by side on the short side of the plate 10 allows for centralized connection and management of external pipes on one side.

[0034] In this embodiment, all internal flow channels of the liquid cooling plate, including but not limited to the inlet flow channel 20, the first cooling flow channel 31, the collecting flow channel 40, the second cooling flow channel 51, and the outlet flow channel 60, are preferably manufactured using an integral processing molding technology. The liquid cooling plate is integrally formed in one piece through etching, stamping, or machining on a single base plate, thereby creating a seamless and continuous internal flow channel network, enhancing the structural integrity and sealing reliability of the liquid cooling plate.

[0035] Using the liquid cooling plate of this embodiment, the coolant first enters through the inlet hole 11 of the plate body 10, and then flows into the water inlet channel 20 connected thereto. Through the water inlet channel 20, it is transported to the central area between the two sets of first cooling channels 31, and simultaneously enters the two sets of first cooling channels 31 through the first inlet 32. In each first cooling channel 31, the coolant flows in an S-shaped meandering motion along the long side of the plate body 10, alternating between large and small bends, and then flows into the collector channel 40 through the first outlet 33. After the flow converges and pressure is balanced in the collector channel 40, the coolant is evenly distributed to each second cooling channel 51 through the second inlet 52. In each second cooling channel 51, the coolant flows in a symmetrical S-shaped meandering motion, and after completing the final heat dissipation, it flows into the outlet channel 60 through the second outlet 53. Finally, the coolant is discharged from the outlet hole 12 of the plate body 10 through the outlet channel 60, completing the entire cooling cycle. The coolant in this liquid cooling plate has a balanced flow rate and velocity distribution in the flow channel, resulting in good heat dissipation.

[0036] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments 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.

[0037] The embodiments described above are merely illustrative of several implementations 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 and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A liquid cooling plate, comprising a plate body (10), a liquid inlet hole (11) and a liquid outlet hole (12) disposed on the plate body (10), and a cooling channel formed inside the plate body (10), characterized in that, The cooling channel includes: The first cooling channel group (30) is connected to the liquid inlet (11) and includes two groups of first cooling channels (31) arranged at intervals along the X direction. Each group of first cooling channels (31) extends in an S-shape along the X direction. The second cooling channel group (50) is connected to the first cooling channel group (30) and the liquid outlet (12), and includes at least three groups of second cooling channels (51) arranged at intervals along the X direction, each group of second cooling channels (51) extending in an S-shape along the Y direction.

2. The liquid cooling plate according to claim 1, characterized in that: The area between the two sets of first cooling channels (31) forms a first inlet (32), and each set of first cooling channels (31) has a first outlet (33) on both sides along the X direction.

3. The liquid cooling plate according to claim 2, characterized in that: Each group of first cooling channels (31) is formed by a first sub-channel (34) and a second sub-channel (35) arranged in parallel, forming an S-shaped path through continuous bending.

4. The liquid cooling plate according to claim 3, characterized in that: Each group of second cooling channels (51) has a second inlet (52) on the side of the first cooling channel group (30) along the Y direction, and a second outlet (53) on the side of the second cooling channel group (51) away from the first cooling channel group (30) along the Y direction.

5. The liquid cooling plate according to claim 4, characterized in that: Each group of second cooling channels (51) includes a symmetrically arranged third sub-channel (54) and fourth sub-channel (55). The S-shaped path of the third sub-channel (54) detours to one side in the X direction, and the path of the fourth sub-channel (55) detours to the other side in the X direction.

6. The liquid cooling plate according to claim 5, characterized in that: The cross-sectional area of ​​the two sub-channels in the first cooling channel (31) is greater than the cross-sectional area of ​​the two sub-channels in the second cooling channel (51).

7. The liquid cooling plate according to claim 6, characterized in that: The first sub-channel (34), the second sub-channel (35), the third sub-channel (54), and the fourth sub-channel (55) have the same width, and the depth of the first sub-channel (34) and the second sub-channel (35) is less than the depth of the third sub-channel (54) and the fourth sub-channel (55).

8. The liquid-cooled plate according to any one of claims 5-7, characterized in that: The liquid cooling plate also includes an inlet channel (20), an outlet channel (60), and a collection channel (40). The inlet end of the inlet channel (20) is connected to the liquid inlet hole (11), and the outlet end of the inlet channel (20) is located between the two sets of the first cooling channels (31) and is connected to the first inlet (32). The inlet end of the water outlet channel (60) is connected to the second outlet (53), and the outlet end of the water outlet channel (60) is connected to the liquid outlet hole (12). The flow channel (40) connects the first outlet (33) and the second inlet (52) simultaneously.

9. The liquid cooling plate according to claim 8, characterized in that: The liquid inlet (11) and the liquid outlet (12) are both located on the same side of the liquid cooling plate.

10. The liquid cooling plate according to claim 9, characterized in that: The liquid inlet (11) and the liquid outlet (12) are located on the short side of the liquid cooling plate on one side in the X direction.

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