Camouflage pulse flow type micro-channel liquid cooling heat dissipation module
By designing a maze-like pulse flow microchannel liquid cooling module, the problem of uneven heat dissipation in the matrix heat source of the liquid cooling module is solved, achieving uniform cooling and space saving, and ensuring product stability.
Patent Information
- Application Number
- CN202511898095.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-02-13
AI Technical Summary
Existing liquid cooling modules, in their matrix heat source setups, have poor heat dissipation effects on heat sources far from the inlet connectors, resulting in large temperature differences, affecting normal product use, and occupying a significant amount of product space.
The design incorporates a maze-like pulse-flow microchannel liquid cooling module, employing multiple heat sources arranged in an adaptive array. Through the maze-like pulse-flow microchannel structure, the coolant is evenly distributed and converged, forming a maze-like liquid cooling channel to achieve uniform cooling.
It achieves uniform heat dissipation with a rectangular array of heat sources, with a temperature difference of no more than 5℃. Cooling can be completed with only a single module. The structure is simple, does not occupy too much space, and ensures stable and reliable operation of the product.
Smart Images
Figure CN121531677A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of liquid cooling structure, and particularly to a micro-channel liquid cooling heat dissipation module with maze pulse flow type. BACKGROUND
[0002] The liquid cooling heat dissipation module is a high-efficiency heat dissipation solution and is widely used in the fields of electronic equipment, electric vehicle battery, data center server, laser and wind power equipment. The liquid cooling heat dissipation module is a core heat transfer component in a liquid cooling system and is mainly used for efficiently transferring heat generated by a heat generating component (such as a chip, a battery module or an IGBT module) to flowing cooling liquid, and then transferring the heat to an external radiator by the cooling liquid to dissipate to the environment.
[0003] The liquid cooling heat dissipation module includes a bottom plate, a flow channel, an inlet and outlet joint and a cover plate, wherein the bottom plate or the cover plate is used for directly contacting the heat generating component, and the bottom plate and the cover plate are combined to form a liquid cooling cavity and the flow channel. However, the existing liquid cooling heat dissipation module sequentially flows through the flow channel and then flows into the converging output flow channel, and finally flows out through the outlet joint. In actual use, for the mechanism with multiple heat sources arranged in a matrix, the temperature difference of the heat source far from the inlet joint relative to the heat source close to the inlet joint is greater than 5℃, and sometimes even greater than 10℃, which greatly increases the power consumption of the heat source and seriously affects the normal use of the product. For this problem, the existing liquid cooling heat dissipation module for the matrix heat source generally uses multiple liquid cooling heat dissipation modules arranged in parallel to exchange heat, so that the product needs to be equipped with multiple cooling liquid inlets and outlets, which occupies a large amount of product space. Therefore, it is a technical problem to be solved to arrange a single liquid cooling heat dissipation module for the matrix heat source to ensure uniform and reliable heat dissipation while reducing the occupied space of the pipe joint. SUMMARY
[0004] To solve the above problems, the present application provides a micro-channel liquid cooling heat dissipation module with maze pulse flow type, which is suitable for arranging multiple heat sources arranged in an array to ensure that all heat sources have relatively stable uniform heat dissipation performance and ensure stable and reliable operation of the product, and has a simple structure and does not occupy too much product space.
[0005] A micro-channel liquid cooling heat dissipation module with maze pulse flow type is suitable for a product with N columns of heat sources in the width direction, wherein N is a natural number greater than or equal to 3, and the micro-channel liquid cooling heat dissipation module comprises: an upper cover plate; The lower cover plate includes a reference plane area and a recessed flow channel assembly. The flow channel assembly includes an inlet branch channel, an outlet converging channel, (N-1) groups of parallel branch channels, and a group of converging heat dissipation channels. The converging heat dissipation channels are arranged corresponding to the heat source arrangement of the corresponding column on one side of the width direction. The inlet branch channels are connected to the inlet of each group of branch channels. Each group of inlet branch channels is arranged sequentially along the arrangement direction of each column of heat sources in the corresponding area to form a reciprocating flow channel structure. The reciprocating flow channel structure covers all heat source positions corresponding to each column of heat sources. The branch channels are provided with a converging transition channel at the output end of the reciprocating flow channel structure. The converging transition channel of each group of branch channels flows into the corresponding inlet of the converging heat dissipation channel. The converging heat dissipation channel covers all heat sources of the corresponding column on one side of the width direction. The output end of the converging heat dissipation channel is connected to the outlet converging channel. Liquid inlet assembly; And the liquid outlet assembly; The upper cover plate is mounted on the lower cover plate. The lower surface of the upper cover plate is arranged in close contact with the reference plane area of the lower cover plate. After the upper cover plate is mounted on the lower cover plate, it forms a liquid inlet and a liquid outlet. The liquid inlet and the liquid outlet are arranged at intervals along one of the width sides of the liquid cooling heat dissipation module. The inlet diversion channel is connected to the liquid inlet, and the outlet confluence channel is connected to the liquid outlet. The liquid inlet assembly is inserted into the liquid inlet, and the liquid outlet assembly is inserted into the liquid outlet.
[0006] Its further features are: The upper cover plate is provided with a liquid inlet corresponding to the position of the inlet diversion channel, and the upper cover plate is provided with a liquid outlet corresponding to the position of the outlet confluence channel. The liquid inlet and liquid outlet are arranged adjacent to each other and spaced apart, so that the liquid inlet and liquid outlet equipment are arranged in a concentrated manner, occupying less space on the product. The reciprocating flow channel structure includes a primary straight flow channel, a secondary guide flow channel, and a tertiary guide flow channel. The primary straight flow channel is arranged in a straight line along the length of each heat source. The end of the primary straight flow channel is connected to the input end of the secondary guide flow channel through a first transition flow channel. The secondary guide flow channel has several first converging guide bends arranged along its length, which allow the coolant to fully converge and contact before flowing evenly and separately. The end of the secondary guide flow channel is connected to the input end of the tertiary guide flow channel through a second transition flow channel. The tertiary guide flow channel has several second converging guide bends arranged along its length, which allow the coolant to converge and contact before flowing evenly and separately. The primary straight flow channel is divided into several groups of primary straight branch channels along its covered width area, the secondary guide flow channel is divided into several groups of secondary guide branch channels along its covered width area, and the tertiary guide flow channel is divided into several groups of tertiary guide branch channels along its covered width area. The branch flow channel arrangement allows the coolant and the heat source to fully contact each other, facilitating sufficient heat exchange. The first transition channel, the second transition channel, and the confluence transition channel are all formed by combinations of corresponding branch transition channels; The junction transition channel is further provided with branch junction points between several groups of branch transition channels, which allows the coolant to be fully mixed and then flow evenly again to ensure uniform cooling. The heat dissipation channel is arranged with several inlets along the width direction of the heat source in its corresponding column, and each group of heat dissipation transition channels is arranged to connect with the inlet of the heat dissipation channel at the corresponding position. The heat dissipation channel includes a straight heat dissipation channel corresponding to the far end coolant and a composite heat dissipation channel corresponding to the near end coolant. The straight heat dissipation channel is configured with a reciprocating flow channel structure corresponding to the far end, and the composite heat dissipation channel is configured with a reciprocating flow channel structure corresponding to the near end. The straight confluence heat dissipation channel is divided into several groups of straight confluence heat dissipation branch channels along its covered width area. The composite confluence heat dissipation channel is divided into several groups of composite confluence heat dissipation branch channels along its covered width area. Adjacent composite confluence heat dissipation branch channels are also provided with guide blocks along their length direction. The guide blocks allow the coolant to be fully mixed and then flow evenly again to ensure uniform cooling. The inlet diversion channel is equipped with a diversion guide block corresponding to the primary straight branch channel of each group of primary straight channels to ensure that the coolant flows evenly into the primary straight branch channel of each group of primary straight channels. The outlet confluence channel corresponds to the buffer guide block of the straight confluence heat dissipation channel and the composite confluence heat dissipation channel, so that the coolant is buffered and then flows into the outlet confluence channel.
[0007] With this invention, based on the heat sources arranged in a rectangular array, which are generally battery packs, stacked chipsets, or arrayed IGBT modules, when the number of columns in the width direction is greater than or equal to 3, the heat dissipation channel of one column of heat sources located on the side is set at the output end of the heat dissipation channel of other columns of heat sources. The total flow rate of the coolant in the column of heat sources located on the side is the sum of the coolant flow rates of all other columns of heat sources. Although the initial temperature of the coolant in this column is relatively higher than that of each other column, due to the large total flow rate, the temperature difference between the coolant in the column of heat sources located on the side and the coolant in each other column does not exceed 5°C during the actual cooling process. This allows products with 3 or more columns of heat sources in the width direction to achieve reliable cooling and temperature reduction with only a single set of maze pulse flow microchannel liquid cooling heat dissipation module. It is adapted to the arrangement of multiple heat sources in the array, so that all heat sources obtain relatively stable uniform temperature heat dissipation performance, ensuring the stable and reliable operation of the product, and the structure is simple and does not occupy too much product space. Attached Figure Description
[0008] Figure 1 This is a perspective view of a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the flow channel arrangement according to a specific embodiment of the present invention; Figure 3 This is an exploded perspective view of a specific embodiment of the present invention; Figure 4 This is a schematic diagram of a specific embodiment of the present invention installed in a battery pack; Figure 5 This is a schematic diagram of the battery pack layout adapted to a specific embodiment of the present invention. The cooling temperature is marked in each group of batteries in the battery pack. Figure 6 The simulated temperature cloud map of the coolant after the coolant of the present invention cools the battery pack; The names corresponding to the serial numbers in the diagram are as follows: Liquid inlet 1, liquid outlet 2; Upper cover plate 10, lower cover plate 20, reference plane area 30, flow channel assembly 40, inlet diversion channel 50, diversion guide block 51, outlet confluence channel 60, buffer guide block 61, diversion channel 70, first diversion channel 701, second diversion channel 702, reciprocating flow channel structure 71, primary straight flow channel 711, secondary guide flow channel 712, tertiary guide flow channel 713, first transition flow channel 714, first confluence guide bend 715, second transition flow channel 716, second confluence guide bend 717, confluence transition flow channel 72, branch confluence point 721, confluence heat dissipation channel 80, straight confluence heat dissipation channel 81, composite confluence heat dissipation channel 82, guide block 821, liquid inlet assembly 90, liquid outlet assembly 100; Maze-type pulse flow microchannel liquid cooling heat dissipation module 200; Battery pack 300, battery cell 301, battery cover 302, bracket 303, thermal conductive gel 304, heating film 305, thermal conductive pad 306. Detailed Implementation
[0009] A maze-like pulse-flow microchannel liquid cooling module is suitable for products with N columns of heat sources in the width direction, where N is a natural number greater than or equal to 3. (See attached image) Figures 1-3 It includes: an upper cover plate 10, a lower cover plate 20, a liquid inlet assembly 90, and a liquid outlet assembly 100; The lower cover plate 20 includes a reference plane area 30 and a recessed flow channel assembly 40. The flow channel assembly 40 includes an inlet branch channel 50, an outlet converging channel 60, (N-1) groups of parallel branch channels 70, and a group of converging heat dissipation channels 80. The converging heat dissipation channels 80 are arranged to correspond to the heat source arrangement of the corresponding column on one side of the width direction. The inlet branch channels 50 are connected to the inlet of each group of branch channels 70. Each group of inlet branch channels is arranged sequentially along the arrangement direction of each column of heat sources in the corresponding area to form a reciprocating flow channel structure 71. The reciprocating flow channel structure 71 covers all the corresponding positions of the heat sources in each column. The branch channels 70 are provided with a converging transition channel 72 at the output end of the reciprocating flow channel structure 71. The converging transition channel 72 of each group of branch channels 70 flows into the corresponding inlet of the converging heat dissipation channel 80. The converging heat dissipation channel 80 covers all the heat sources of the corresponding column on one side of the width direction. The output end of the converging heat dissipation channel 80 is connected to the outlet converging channel 60. The upper cover plate 10 is installed on the lower cover plate 20. The lower surface of the upper cover plate 10 is arranged in close contact with the reference plane area 30 of the lower cover plate 20. After the upper cover plate 10 is installed on the lower cover plate 20, it forms a liquid inlet 1 and a liquid outlet 2. The liquid inlet 1 and the liquid outlet 2 are arranged at intervals on one of the width sides of the liquid cooling heat dissipation module. The inlet diversion channel 50 is connected to the liquid inlet 1, and the outlet confluence channel 60 is connected to the liquid outlet 2. The liquid inlet assembly 90 is inserted into the liquid inlet 1, and the liquid outlet assembly 100 is inserted into the liquid outlet 2.
[0010] Specific embodiments, which are aimed at such as Figure 4 , Figure 5 The array shown features 24 battery packs arranged in a maze-like pulse flow microchannel liquid cooling module. The battery packs are arranged along the width direction to form 3 columns, each column containing 8 battery packs.
[0011] In a specific embodiment, the upper cover plate 10 is provided with an inlet 1 at the position corresponding to the inlet diversion channel 50, and the upper cover plate 10 is provided with an outlet 2 at the position corresponding to the outlet confluence channel 60. The inlet 1 and outlet 2 are arranged adjacent to each other and spaced apart, so that the inlet and outlet equipment are arranged in a concentrated manner, occupying less space on the product.
[0012] The flow channel assembly 40 includes an inlet branch channel 50, an outlet confluence channel 60, two sets of parallel branch channels 70, and a confluence heat dissipation channel 80. The two sets of parallel branch channels include a first branch channel 701 and a second branch channel 702. The first branch channel 701 is arranged away from the outlet confluence channel 60. The reciprocating flow channel structure 71 of the first diversion channel 701 and the second diversion channel 702 includes a primary straight flow channel 711, a secondary guide flow channel 712, and a tertiary guide flow channel 713. The primary straight flow channel 713 is arranged in a straight line along the length direction of each heat source. The end of the primary straight flow channel 711 is connected to the input end of the secondary guide flow channel 712 through a first transition flow channel 714. The secondary guide flow channel 712 has several first converging guide bends 715 arranged along the length direction, which allows the coolant to fully converge and contact before flowing evenly and splitting. The end of the secondary guide flow channel 712 is connected to the input end of the tertiary guide flow channel 713 through a second transition flow channel 716. The tertiary guide flow channel 713 has several second converging guide bends 717 arranged along the length direction, which allows the coolant to converge and contact before flowing evenly and splitting. The primary straight flow channel 711 is divided into several groups of primary straight branch channels along its coverage area, the secondary guide flow channel 712 is divided into several groups of secondary guide branch channels along its coverage area, and the tertiary guide flow channel 713 is divided into several groups of tertiary guide branch channels along its coverage area. The branch flow channel arrangement allows the coolant and the heat source to fully contact each other, which facilitates full heat exchange. The first transition channel 714, the second transition channel 716, and the confluence transition channel 72 are all formed by the combination of corresponding branch transition channels; The junction transition channel 72 is also provided with a branch junction point 721 between several groups of branch transition channels, which allows the coolant to be fully mixed and then flow evenly again to ensure uniform cooling. The heat dissipation channel 80 has several inlets arranged along the width direction of the heat source in its corresponding column, and each group of heat dissipation channels 80 is connected to the inlet of the heat dissipation channel 72 at the corresponding position.
[0013] In specific implementation, the heat dissipation channel includes a straight heat dissipation channel 81 corresponding to the first branch channel 701 and a composite heat dissipation channel 82 corresponding to the second branch channel 702. The straight heat dissipation channel 81 is set with the reciprocating flow channel structure 71 of the far end of the first branch channel 701, and the composite heat dissipation channel 82 is set with the reciprocating flow channel structure 71 of the near end of the second branch channel 702. The straight-line heat dissipation channel 81 is divided into several groups of straight-line heat dissipation branch channels along its coverage area, and the composite heat dissipation channel 82 is divided into several groups of composite heat dissipation branch channels along its coverage area. Adjacent composite heat dissipation branch channels are also provided with guide blocks 821 along their length direction. The guide blocks 821 ensure that the coolant is fully mixed and then flows evenly again to ensure uniform cooling. A flow guide block 51 is provided on the inlet flow channel 50 corresponding to the primary straight branch channel of each group of primary straight flow channels to ensure that the coolant flows evenly into the primary straight branch channel of each group of primary straight flow channels 711. The outlet confluence channel 60 corresponds to the buffer guide block 61 of the straight confluence heat dissipation channel 81 and the composite confluence heat dissipation channel 82, so that the coolant is buffered and then flows into the outlet confluence channel 60.
[0014] The assembly diagram of a specific embodiment is shown below. Figure 4 In the specific embodiment, the upper cover plate 10 of the maze pulse flow microchannel liquid cooling heat dissipation module 200 is arranged in close contact with the thermal pad 306 of the battery pack 300 (including the battery cell 301, battery cover 302, bracket 303, thermal conductive gel 304, heating film 305, and thermal conductive pad 306), so that it can obtain the following during operation: Figure 5 The battery operating temperature, and how to obtain such Figure 6 The coolant operating temperature is shown.
[0015] Its working principle is as follows: Based on the rectangular array of heat sources, which are generally battery packs, stacked chipsets, or arrayed IGBT modules, when the number of columns in the width direction is greater than or equal to 3, the heat dissipation channel of the heat source located on the side is set at the output end of the heat dissipation channel of the other columns of heat sources. The total flow rate of the coolant in the side column of heat sources is the sum of the coolant flow rates of all other columns of heat sources. Although the initial temperature of the coolant in this column is relatively higher than that of the other columns, due to the large total flow rate, the temperature difference between the coolant in the side column and the coolant in the other columns does not exceed 5°C during the actual cooling process. Products with three or more heat sources in the width direction can reliably cool down with just a single set of maze pulse flow microchannel liquid cooling modules. Several columns of branch channels and a set of converging heat dissipation channels are combined to form a maze liquid cooling channel. At the same time, the setting of the first converging guide bend, the second converging guide bend, and the guide block, combined with pulse liquid inlet, will generate pulse flow during the flow process, thereby making the entire flow channel form a maze pulse flow microchannel. It is adapted to the arrangement of multiple heat sources in an array, so that all heat sources obtain relatively stable uniform temperature heat dissipation performance, ensuring the stable and reliable operation of the product, and the structure is simple and does not occupy too much product space.
[0016] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
[0017] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A maze-like pulse-flow microchannel liquid cooling module, adapted to products with N columns of heat sources in the width direction, where N is a natural number greater than or equal to 3, characterized in that, It includes: Top cover; The lower cover plate includes a reference plane area and a recessed flow channel assembly. The flow channel assembly includes an inlet branch channel, an outlet converging channel, (N-1) groups of parallel branch channels, and a group of converging heat dissipation channels. The converging heat dissipation channels are arranged corresponding to the heat source arrangement of the corresponding column on one side of the width direction. The inlet branch channels are connected to the inlet of each group of branch channels. Each group of inlet branch channels is arranged sequentially along the arrangement direction of each column of heat sources in the corresponding area to form a reciprocating flow channel structure. The reciprocating flow channel structure covers all heat source positions corresponding to each column of heat sources. The branch channels are provided with a converging transition channel at the output end of the reciprocating flow channel structure. The converging transition channel of each group of branch channels flows into the corresponding inlet of the converging heat dissipation channel. The converging heat dissipation channel covers all heat sources of the corresponding column on one side of the width direction. The output end of the converging heat dissipation channel is connected to the outlet converging channel. Liquid inlet assembly; And the liquid outlet assembly; The upper cover plate is mounted on the lower cover plate. The lower surface of the upper cover plate is arranged in close contact with the reference plane area of the lower cover plate. After the upper cover plate is mounted on the lower cover plate, it forms a liquid inlet and a liquid outlet. The liquid inlet and the liquid outlet are arranged at intervals along one of the width sides of the liquid cooling heat dissipation module. The inlet diversion channel is connected to the liquid inlet, and the outlet confluence channel is connected to the liquid outlet. The liquid inlet assembly is inserted into the liquid inlet, and the liquid outlet assembly is inserted into the liquid outlet.
2. The maze pulse flow microchannel liquid cooling heat dissipation module according to claim 1, characterized in that: The upper cover plate is provided with an inlet corresponding to the position of the inlet diversion channel, and the upper cover plate is provided with an outlet corresponding to the position of the outlet confluence channel. The inlet and outlet are arranged adjacent to each other and spaced apart.
3. The maze pulse flow microchannel liquid cooling heat dissipation module according to claim 1, characterized in that: The reciprocating flow channel structure includes a primary straight flow channel, a secondary guide flow channel, and a tertiary guide flow channel. The primary straight flow channel is arranged in a straight line along the length direction of each heat source. The end of the primary straight flow channel is connected to the input end of the secondary guide flow channel through a first transition flow channel. The secondary guide flow channel has several first converging guide bends arranged along its length direction. The end of the secondary guide flow channel is connected to the input end of the tertiary guide flow channel through a second transition flow channel. The tertiary guide flow channel has several second converging guide bends arranged along its length direction.
4. The maze-like pulse-flow microchannel liquid-cooled heat dissipation module according to claim 3, characterized in that: The primary straight flow channel is divided into several groups of primary straight branch channels along its covered width area, the secondary guide flow channel is divided into several groups of secondary guide branch channels along its covered width area, and the tertiary guide flow channel is divided into several groups of tertiary guide branch channels along its covered width area.
5. The maze pulse flow microchannel liquid cooling heat dissipation module according to claim 4, characterized in that: The first transition channel, the second transition channel, and the confluence transition channel are all formed by the combination of corresponding branch transition channels.
6. The maze pulse flow microchannel liquid cooling heat dissipation module according to claim 5, characterized in that: The confluence transition channel is further provided with branch confluence points between several groups of branch transition channels.
7. A maze-like pulsed flow microchannel liquid cooling module according to claim 6, characterized in that: The heat dissipation channels are arranged with several inlets along the width of the heat source in their corresponding column, and each group of transition channels is connected to the inlet of the heat dissipation channel at the corresponding position.
8. A maze-like pulsed flow microchannel liquid cooling module according to claim 3 or 4, characterized in that: The heat dissipation channel includes a straight heat dissipation channel corresponding to the distal coolant and a composite heat dissipation channel corresponding to the proximal coolant. The straight heat dissipation channel is configured with a reciprocating flow channel structure corresponding to the distal end, and the composite heat dissipation channel is configured with a reciprocating flow channel structure corresponding to the proximal end.
9. A maze-like pulsed flow microchannel liquid cooling module according to claim 8, characterized in that: The straight-line heat dissipation channel is divided into several groups of straight-line heat dissipation branch channels along its covered width area, and the composite heat dissipation channel is divided into several groups of composite heat dissipation branch channels along its covered width area. Adjacent composite heat dissipation branch channels are also provided with guide blocks along their length direction.
10. A maze-like pulsed flow microchannel liquid cooling module according to claim 9, characterized in that: The inlet diversion channel is equipped with a diversion guide block corresponding to the primary straight branch channel of each group of primary straight channels; The outlet confluence channel corresponds to the buffer guide block of the straight confluence heat dissipation channel and the composite confluence heat dissipation channel.