Cold plate with improved heat dissipation

Abstract

The utility model provides a cold plate of improving heat dissipation capacity relates to power battery heat dissipation technical field for solving the problem that the existing cold plate heat dissipation efficiency is low, temperature uniformity is poor. The cold plate of improving heat dissipation capacity includes upper plate body and lower plate body, the upper plate surface of upper plate body is used for with the battery cell and is pasted together, the lower plate body sets up in the downside of upper plate body, and the upper plate body cover is established on the lower plate body and is sealedly connected with the lower plate body, the side of lower plate body towards upper plate body is equipped with a plurality of parallel distribution's flow channel, and the flow channel in both sides penetrates the side wall surface of lower plate body to form liquid inlet and liquid outlet respectively, along the extension direction perpendicular to flow channel, the both ends of flow channel still are equipped with two exchange channels, and exchange channel communicates all flow channels, wherein, the bottom wall of each flow channel is equipped with a plurality of flow grooves, and flow groove extends from the bottom wall of flow channel to the direction away from upper plate body, and a plurality of flow grooves are spaced apart distribution along the extension direction of flow channel.

Description

Technical Field

[0001] This application relates to the field of power battery heat dissipation technology, and in particular to a cold plate for improving heat dissipation capacity. Background Technology

[0002] In power battery modules or other high-power electronic devices, battery cells generate a large amount of heat during operation. If this heat cannot be dissipated in time, the cell temperature will rise, affecting its performance and lifespan, and even causing safety hazards. Cold plates, as commonly used liquid cooling components, remove heat through the flow of internal coolant. Their heat dissipation capacity and temperature uniformity directly determine the heat dissipation effect.

[0003] Existing cold plates mostly adopt a simple parallel flow channel design, which makes it easy for the coolant to form a laminar flow in the flow channel, resulting in low heat exchange efficiency; and the lack of effective communication between the flow channels leads to large temperature differences of the coolant in each flow channel, making it easy for local hot spots to appear on the surface of the cell. Utility Model Content

[0004] This application provides a cold plate with improved heat dissipation capacity to solve the problems of low heat dissipation efficiency and poor temperature uniformity of existing cold plates.

[0005] This application provides a cold plate for improving heat dissipation, including an upper plate and a lower plate. The upper surface of the upper plate is used to attach to the battery cell. The lower plate is disposed on the lower side of the upper plate, and the upper plate covers the lower plate and is sealed to it. Multiple parallel flow channels are opened on the side of the lower plate facing the upper plate. The flow channels on both sides penetrate one side wall of the lower plate to form an inlet and an outlet, respectively. Along the extension direction perpendicular to the flow channels, two exchange channels are also provided at both ends of the flow channels, and the exchange channels connect all the flow channels. Each flow channel has multiple flow-enhancing grooves on its bottom wall. The flow-enhancing grooves extend from the bottom wall of the flow channel away from the upper plate, and the multiple flow-enhancing grooves are spaced apart along the extension direction of the flow channels.

[0006] The flow-enhancing grooves on the bottom wall of the flow channel in this application disrupt the laminar flow of the coolant, inducing local turbulence. This makes the mixing of the coolant and the flow channel wall (which directly contacts the heat transferred from the battery cell to the upper plate) more intense, significantly improving heat exchange efficiency. The structure of the flow-enhancing grooves creates local obstruction to the flow, reducing the overall flow velocity of the coolant in the flow channel and extending the residence time of the coolant in the flow channel, allowing the coolant more time to absorb heat from the battery cell. The flow-enhancing grooves extend downward from the bottom wall, which is equivalent to adding a "cavity" structure in the flow channel, increasing the total volume of coolant that can be accommodated in the flow channel and improving the total heat capacity of the coolant. The two exchange channels connect all the flow channels, allowing the coolant to flow laterally between the parallel flow channels. Combined with the effect of the flow-enhancing grooves, the laterally flowing coolant is also fully mixed due to the enhanced turbulence and reduced flow velocity, balancing the temperature differences between the flow channels.

[0007] In some embodiments of this application, a plurality of flow boosting slots are provided in the switching channel, and the flow boosting slots are distributed at intervals along the extension direction of the switching channel.

[0008] The exchange channel acts as a bridge for the coolant to flow laterally between the flow channels. The internal flow-enhancing tanks also achieve the following effects: increase the turbulence of the lateral flow, so that the hot and cold coolants in different flow channels are mixed more thoroughly; reduce the lateral flow velocity, extend the residence time of the coolant in the exchange channel, and ensure more thorough heat exchange; increase the volume of coolant in the exchange channel, improve the heat capacity of the lateral flow, and further balance the temperature of each flow channel.

[0009] In some embodiments of this application, multiple flow-enhancing channels within the flow channel are distributed at equal intervals. This equal interval distribution means that the flow-enhancing channels cause consistent disturbance frequencies to the coolant, the turbulence intensity is uniform along the flow channel's extension direction, the velocity reduction is uniform, and the increase in coolant volume is uniform along the flow path. Ultimately, this stabilizes the heat exchange capacity of each section within the flow channel, preventing the formation of hot spots due to insufficient local heat exchange.

[0010] In some embodiments of this application, the spacing between the flow-enhancing channels located in different flow channels is the same. This structure can make the turbulence, flow velocity, and volume parameters of all flow channels consistent or close, ensuring overall heat dissipation uniformity.

[0011] In some embodiments of this application, the flow-enhancing channels within the exchange channel are evenly spaced. These evenly spaced flow-enhancing channels ensure uniform lateral turbulence intensity along the channel's extension direction, consistent reduction in lateral velocity, and uniform increase in coolant volume. Ultimately, this ensures consistent heat exchange efficiency across all flow channels, preventing overheating of edge channels due to uneven lateral mixing.

[0012] In some embodiments of this application, the spacing between the flow-enhancing channels within the exchange channel is greater than the spacing between the flow-enhancing channels within the flow channel. The flow channel is the main heat exchange area, requiring higher frequency turbulence, lower flow velocity, and larger volume to enhance direct heat exchange with the battery cell; the core function of the exchange channel is flow guidance and mixing. If the spacing is too small, it will lead to excessive lateral flow resistance, affecting the distribution efficiency of coolant in each flow channel; with a larger spacing, the turbulence intensity is moderate, the flow velocity reduction is small, and the volume increase is reasonable, which can ensure the lateral mixing requirements while avoiding excessive overall flow resistance.

[0013] In some embodiments of this application, the cross-sectional area of ​​the flow-enhancing trough is equal or gradually decreases along the direction from the lower plate to the upper plate.

[0014] Regardless of how the cross-sectional area of ​​the flow booster changes, it can alter the flow cross-section of the coolant as it flows through the flow channel or exchange channel, thereby inducing turbulence in the coolant at the flow booster.

[0015] In some embodiments of this application, the cross-section of the flow booster is square, fan-shaped, or semi-circular. Regular shapes are easy to process; square cross-sections have sharp corners, resulting in good turbulence and intense flow; fan-shaped or semi-circular cross-sections have smooth edges, providing moderate disturbance to the coolant flow and minimizing velocity reduction.

[0016] In some embodiments of this application, the width of the flow-enhancing groove is smaller than the width of the flow channel along the extension direction perpendicular to the flow channel. This structure can ensure that the main flow direction of the coolant in the flow channel is stable, and that the flow rate and heat exchange effect meet the heat dissipation requirements. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0018] Figure 1 This is a schematic diagram of a cold plate for improving heat dissipation provided in an embodiment of this application.

[0019] Figure 2 The cold plate for improving heat dissipation provided in the embodiments of this application Figure 1 A schematic cross-sectional view along the middle AA.

[0020] Figure 3 This is a schematic diagram of the lower plate of the cold plate that improves heat dissipation capacity according to an embodiment of this application.

[0021] Reference numerals in the attached drawings: 1-Upper plate; 2-Lower plate; 3-Outlet; 4-Inlet; 5-Top surface of the flow channel; 6-Bottom surface of the flow channel; 7-Flow booster; 8-Top surface of the lower plate. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0026] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0027] In power battery modules or other high-power electronic devices, battery cells generate a large amount of heat during operation. If this heat cannot be dissipated in time, the cell temperature will rise, affecting its performance and lifespan, and even causing safety hazards. Cold plates, as commonly used liquid cooling components, remove heat through the flow of internal coolant. Their heat dissipation capacity and temperature uniformity directly determine the heat dissipation effect.

[0028] Existing cold plates mostly adopt a simple parallel flow channel design, which makes it easy for the coolant to form a laminar flow in the flow channel, resulting in low heat exchange efficiency; and the lack of effective communication between the flow channels leads to large temperature differences of the coolant in each flow channel, making it easy for local hot spots to appear on the surface of the cell.

[0029] Therefore, please refer to Figure 1 This application provides a cold plate for improving heat dissipation capacity, including an upper plate 1 and a lower plate 2.

[0030] Please refer to Figure 1 The upper plate 1 has an upper surface that is used to bond with the battery cell. The upper plate 1 can be a flat plate structure, and its material can be aluminum alloy with high thermal conductivity, which has good thermal conductivity and machinability. The upper surface of the upper plate 1 is used to directly bond with the battery cell, and the heat generated by the battery cell during operation is transferred through the upper plate 1 to the coolant on one side of the lower plate 2.

[0031] Please refer to Figure 1The lower plate 2 is located below the upper plate 1, and the upper plate 1 covers the lower plate 2 and is sealed to it. The lower plate 2 is located below the upper plate 1, and its material is the same as that of the upper plate 1. Its shape is adapted to the upper plate 1, and it is generally flat, with a thickness slightly greater than that of the upper plate 1 to facilitate the processing of flow channels and flow booster grooves 7. The upper plate 1 covers the lower plate 2, and the two can be sealed together by laser welding to ensure that the internal coolant does not leak.

[0032] Please refer to Figure 2 The lower plate 2 has multiple parallel flow channels on the side facing the upper plate 1. The cross-sectional shape of the flow channels can be rectangular or U-shaped. The flow channels on both sides penetrate one side wall of the lower plate 2 to form the liquid inlet 4 and the liquid outlet 3 respectively.

[0033] Please refer to Figure 2 The inlet 4 is used to introduce low-temperature coolant, and the outlet 3 is used to discharge high-temperature coolant after heat absorption. Both can have circular cross-sections, with diameters adapted to the width of the flow channel.

[0034] Please refer to Figure 3 Along the direction perpendicular to the flow channel, two exchange channels are provided at both ends of the flow channel, connecting all the flow channels. The cross-sectional shape of the exchange channels is the same as that of the flow channels (or slightly wider to improve flow capacity), the depth is the same as that of the flow channels, and its length covers the ends of all flow channels, thus connecting all the flow channels. The function of the exchange channels is to allow the coolant to flow laterally between the flow channels, balancing the coolant temperature in different flow channels.

[0035] Please refer to Figure 2 or Figure 3 Each flow channel has multiple flow-enhancing grooves 7 on its bottom wall. The flow-enhancing grooves 7 extend from the bottom wall of the flow channel away from the upper plate 1, and the multiple flow-enhancing grooves 7 are distributed at intervals along the extension direction of the flow channel. The flow-enhancing grooves 7 extend from the bottom wall of the flow channel away from the upper plate 1 (i.e., inside the lower plate 2), and the depth is usually 1-2 mm, which is less than the depth of the flow channel.

[0036] Please refer to Figure 2 The cross-section of the flow booster 7 can be square, fan-shaped or semi-circular: the corners of a square cross-section (e.g., side length 1-3mm) can form strong disturbances, which is suitable for high heat dissipation demand scenarios; the edges of a fan-shaped or semi-circular cross-section (radius 1-3mm) are smooth, which can reduce flow resistance and is suitable for energy-sensitive scenarios.

[0037] Please refer to Figure 1-3The flow-enhancing groove 7 on the bottom wall of the flow channel in this application disrupts the laminar flow state of the coolant and induces local turbulence, making the mixing of the coolant and the flow channel wall (which directly contacts the heat transferred from the battery cell by the upper plate 1) more intense, thus significantly improving the heat exchange efficiency. The structure of the flow-enhancing groove 7 forms a local obstruction to the flow, reduces the overall flow velocity of the coolant in the flow channel, prolongs the residence time of the coolant in the flow channel, and allows the coolant more time to absorb the heat from the battery cell.

[0038] The flow booster 7 extends downward from the bottom wall, which is equivalent to adding a "cavity" structure in the flow channel, expanding the total volume of coolant that can be contained in the flow channel and increasing the total heat capacity of the coolant; the two exchange channels connect all the flow channels, allowing the coolant to flow laterally between the parallel flow channels. Combined with the function of the flow booster 7, the laterally flowing coolant is also fully mixed due to the enhanced turbulence and reduced flow velocity, balancing the temperature differences between the flow channels.

[0039] For example, please refer to the following: Figure 1-3 The flow channel is a cavity structure formed by the sealed connection of the upper plate 1 and the lower plate 2. The top surface 5 of the flow channel is the bottom surface of the upper plate 1, and the bottom surface 6 of the flow channel is the bottom wall of the inner groove of the lower plate 2. At this time, the bottom surface of the upper plate 1 and the top surface of the lower plate 2 should be sealed and abutted.

[0040] Please refer to Figure 3 In some examples, multiple flow boosting slots 7 are provided in the switching channel, and the flow boosting slots 7 are distributed at intervals along the extension direction of the switching channel.

[0041] The exchange channel is a bridge for the coolant to flow laterally between the flow channels. The internal flow-enhancing groove 7 also achieves the following effects: increasing the turbulence of the lateral flow, so that the hot and cold coolants in different flow channels are mixed more thoroughly; reducing the lateral flow velocity, extending the residence time of the coolant in the exchange channel, and ensuring more thorough heat exchange; increasing the volume of coolant in the exchange channel, improving the heat capacity of the lateral flow, and further balancing the temperature of each flow channel.

[0042] Multiple flow boosting channels 7 can also be set in the exchange channel. These flow boosting channels 7 are distributed at intervals along the extension direction of the exchange channel. Their shape and depth can be consistent with the flow boosting channels 7 in the flow channel to enhance the disturbance effect of the transverse flow.

[0043] Multiple flow-enhancing channels 7 are distributed at intervals along the extension direction of the flow channel, for example, the distance between two adjacent flow-enhancing channels 7 is 3-8 mm.

[0044] Please refer to Figure 3 In some examples, multiple flow-enhancing channels 7 are distributed at equal intervals within the flow channel. This equal interval distribution means that the flow-enhancing channels 7 cause consistent disturbance frequencies to the coolant, the turbulence intensity is uniform along the flow channel extension direction, the velocity reduction is uniform, and the increase in coolant volume is uniform along the flow path. Ultimately, this stabilizes the heat transfer capacity of each section within the flow channel and prevents the formation of hot spots due to insufficient local heat transfer.

[0045] Please refer to Figure 3 In some examples, the spacing of the flow-enhancing channels 7 located in different channels is the same. This structure can make the turbulence, flow velocity, and volume parameters of all channels consistent or close, ensuring overall heat dissipation uniformity.

[0046] Please refer to Figure 3 In some examples, the flow booster channels 7 within the exchange channel are evenly distributed. The evenly spaced flow booster channels 7 within the exchange channel can make the transverse turbulence intensity uniform along the channel extension direction, the transverse velocity reduction consistent, and the coolant volume increase uniform, ultimately ensuring that the heat exchange efficiency of all channels through the exchange channel is consistent, avoiding overheating problems in the edge channels caused by uneven transverse mixing.

[0047] Please refer to Figure 3 In some examples, the spacing between the flow-enhancing channels 7 within the exchange channel is greater than the spacing between the flow-enhancing channels 7 within the flow channel. The flow channel is the main heat exchange area, requiring higher frequency turbulence, lower flow velocity, and larger volume to enhance direct heat exchange with the battery cell; the core function of the exchange channel is flow guidance and mixing. If the spacing is too small, it will lead to excessive lateral flow resistance, affecting the distribution efficiency of coolant in each flow channel; with a larger spacing, the turbulence intensity is moderate, the velocity reduction is small, and the volume increase is reasonable, which can ensure the lateral mixing requirements while avoiding excessive overall flow resistance.

[0048] Please refer to Figure 2 In some examples, the cross-sectional area of ​​the flow booster trough 7 is equal or gradually decreases along the direction from the lower plate 2 to the upper plate 1.

[0049] Regardless of how the cross-sectional area of ​​the flow booster 7 changes, it can change the flow cross-section of the coolant when it flows in the flow channel or exchange channel, thereby causing turbulence in the coolant at the flow booster 7.

[0050] Please refer to Figure 2 In some examples, the cross-section of the flow booster 7 is square, fan-shaped, or semi-circular. Regular shapes are easy to manufacture. Square cross-section flow booster 7 has sharp corners, good turbulence effect, and intense flow. Fan-shaped or semi-circular cross-sections have smooth edges, moderate turbulence effect on coolant flow, and small reduction in flow velocity.

[0051] Alternatively, the cross-section of the flow booster 7 can be triangular or other shapes. The inner wall of the flow booster 7 is preferably a smooth plane or arc surface, which facilitates the flow of coolant and avoids a significant drop in flow rate.

[0052] Please refer to Figure 3In some examples, the width of the flow-enhancing groove 7 is smaller than the width of the flow channel along the extension direction perpendicular to the flow channel. This structure ensures that the main flow direction of the coolant in the flow channel is stable, and that the flow rate and heat exchange effect meet the heat dissipation requirements.

[0053] Compared with the prior art, the solution provided in this application can achieve the following effects.

[0054] Significantly improved heat dissipation efficiency: The flow-enhancing channels 7 in the flow channels and exchange channels can disrupt the laminar flow state of the coolant, forming turbulence and enhancing the heat exchange between the coolant and the cold plate wall. At the same time, the flow-enhancing channels 7 reduce the coolant flow rate, prolong the residence time, and increase the coolant volume (increasing heat capacity), making the range of single heat exchange larger.

[0055] Good temperature uniformity: The parallel flow channels, combined with the exchange channels at both ends, allow the coolant to flow laterally between the flow channels. Combined with the disturbance effect of the flow booster 7, the temperature of each flow channel is effectively balanced. The equal spacing and uniform distance design of the flow booster 7 in the flow channels and exchange channels further ensures the uniformity of overall heat exchange and avoids the appearance of local hot spots on the surface of the battery cell.

[0056] Balance between flow resistance and energy consumption: The spacing between the flow booster troughs 7 in the exchange channel is greater than the spacing in the flow channel, and the width of the flow booster troughs 7 is less than the width of the flow channel. This enhances heat exchange while avoiding excessive flow resistance, thus reducing the energy consumption of the coolant circulation system.

[0057] Stable structure and easy to process: The upper plate 1 and the lower plate 2 are connected by welding or bolt sealing, which ensures reliable sealing; the flow channel, exchange channel and flow booster trough 7 can be processed by conventional processes such as stamping and milling, which is suitable for mass production.

[0058] In some examples, the upper plate 1 is made of 6061 aluminum alloy with a thickness of 3mm. The surface of the upper plate is polished to ensure a tight fit with the battery cell. The surface roughness is Ra1.6 to ensure efficient heat transfer.

[0059] The lower plate 2 is also made of 6061 aluminum alloy with a thickness of 6mm. Seven parallel flow channels are milled on the side facing the upper plate 1. The flow channels extend along the length of the cold plate. Each flow channel has a rectangular cross-section with a width of 8mm and a depth of 3mm. The spacing between adjacent flow channels is 10mm to ensure a uniform flow channel layout.

[0060] The leftmost flow channel runs through the left side wall of the lower plate 2, forming the liquid inlet 4; the rightmost flow channel runs through the left side wall of the lower plate 2 (on the same side as the liquid inlet 4), forming the liquid outlet 3. Both the liquid inlet 4 and the liquid outlet 3 have circular cross-sections with a diameter of 10mm, which facilitates the connection of coolant pipes.

[0061] At both ends of the flow channel (i.e., at both ends of the cold plate along its length), there are two exchange channels along the width direction. The cross-section of the exchange channel is rectangular, with a width of 12mm and a depth of 3mm (consistent with the depth of the flow channel). The length covers the ends of the 7 flow channels, connecting all the flow channels.

[0062] Multiple flow-enhancing grooves 7 are milled on the bottom wall of each flow channel. The flow-enhancing grooves 7 have a square cross-section with a side length of 2mm and a depth of 1.5mm (extending away from the upper plate 1). They are evenly distributed along the length of the flow channel, and the distance between adjacent flow-enhancing grooves 7 is 5mm.

[0063] Square flow-increasing grooves 7 are also milled in the exchange channel. The dimensions are the same as those of the flow-increasing grooves 7 in the flow channel (side length 2mm, depth 1.5mm). They are evenly distributed along the length of the exchange channel, and the distance between adjacent flow-increasing grooves 7 is 8mm (greater than the distance in the flow channel).

[0064] The upper plate 1 and the lower plate 2 are connected by laser welding with a weld width of 0.5mm. The weld seam is located on the periphery of the flow channel and the exchange channel to ensure that the internal coolant will not leak.

[0065] After the coolant enters the left flow channel through the inlet 4, part of it flows along the flow channel, while the other part is distributed to other flow channels through the exchange channels at both ends. Inside the flow channel, the flow-enhancing tank 7 causes the coolant to form turbulence, reducing the flow velocity by about 25%, extending the residence time, and increasing the coolant volume by about 10%, which greatly improves the heat exchange efficiency. The flow-enhancing tank 7 in the exchange channel promotes the mixing of coolant in each flow channel, keeping the temperature difference between adjacent flow channels within 1°C. Finally, the coolant that has absorbed heat is discharged from the outlet 3 of the right flow channel, achieving efficient heat dissipation for the battery cell.

[0066] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0067] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A cold plate for improving heat dissipation capacity, characterized in that, include: The upper plate, the upper surface of which is used to bond with the battery cell; The lower plate is disposed on the lower side of the upper plate, and the upper plate covers the lower plate and is sealed to the lower plate; The lower plate has multiple parallel flow channels on one side facing the upper plate. The flow channels on both sides penetrate one side wall of the lower plate to form an inlet and an outlet, respectively. Along the extension direction perpendicular to the flow channel, two exchange channels are also provided at both ends of the flow channel, and the exchange channels connect all the flow channels; Each of the flow channels has multiple flow-enhancing grooves on its bottom wall. The flow-enhancing grooves extend from the bottom wall of the flow channel in a direction away from the upper plate, and the multiple flow-enhancing grooves are distributed at intervals along the extension direction of the flow channel.

2. The cold plate for improving heat dissipation capacity according to claim 1, characterized in that, The exchange channel is provided with a plurality of flow boosting slots, which are spaced apart along the extension direction of the exchange channel.

3. The cold plate for improving heat dissipation capacity according to claim 2, characterized in that, The multiple flow-enhancing channels within the flow channel are evenly spaced.

4. The cold plate for improving heat dissipation capacity according to claim 3, characterized in that, The spacing between the flow-enhancing grooves located in different flow channels is the same.

5. The cold plate for improving heat dissipation capacity according to claim 4, characterized in that, The flow booster slots within the exchange channel are evenly spaced.

6. The cold plate for improving heat dissipation capacity according to claim 5, characterized in that, The spacing between the flow-increasing slots in the exchange channel is greater than the spacing between the flow-increasing slots in the flow channel.

7. The cold plate with improved heat dissipation capacity according to any one of claims 1 to 6, characterized in that, Along the direction from the lower plate to the upper plate, the cross-sectional area of ​​the flow-enhancing trough is equal or gradually decreases.

8. The cold plate for improving heat dissipation capacity according to claim 7, characterized in that, The cross-section of the flow-increasing trough is square, fan-shaped, or semi-circular.

9. The cold plate for improving heat dissipation capacity according to claim 7, characterized in that, Along the extension direction perpendicular to the flow channel, the width of the flow-enhancing groove is smaller than the width of the flow channel.

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