CN219961228U - High-power module radiator - Google Patents
High-power module radiator Download PDFInfo
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- CN219961228U CN219961228U CN202321308566.1U CN202321308566U CN219961228U CN 219961228 U CN219961228 U CN 219961228U CN 202321308566 U CN202321308566 U CN 202321308566U CN 219961228 U CN219961228 U CN 219961228U
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- 230000006837 decompression Effects 0.000 claims abstract description 34
- 238000010146 3D printing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000017525 heat dissipation Effects 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 11
- 238000004088 simulation Methods 0.000 abstract description 10
- 238000005457 optimization Methods 0.000 abstract description 7
- 241000276425 Xiphophorus maculatus Species 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 4
- 238000013401 experimental design Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010998 test method Methods 0.000 description 3
- 238000012795 verification Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Abstract
The utility model belongs to the technical field of piezoelectric devices, and particularly relates to a high-power module radiator. The fin main body of the radiator is that fins are mutually and uniformly distributed on the top of a fin plate in parallel, the fins are vertical to the fin plate and are of an integrated structure, each fin is vertically provided with a platy fin decompression groove, and the side surface of each fin is provided with a disturbing hole; the lattice truss is a core body which is in lattice distribution and connected into a whole, the surface plate is relatively parallel to the fin plate and is arranged at the upper end of the fin, the surface plate is provided with strip-shaped surface plate decompression grooves which are uniformly distributed in parallel, and the surface plate decompression grooves and the fin decompression grooves are vertically corresponding one by one and are communicated to form radiator decompression grooves. According to the utility model, the heat dissipation structure is optimized in two aspects of theory and simulation, so that the internal heat dissipation effect of the high-power supply module is effectively improved, the heat dissipation requirement of the high-power supply module radiator in the actual charging pile is met, and the optimization of the traditional fin heat dissipation structure in the high-power supply module under a fixed volume is realized.
Description
Technical Field
The utility model belongs to the technical field of piezoelectric devices, and particularly relates to a high-power module radiator.
Background
Under the background of double carbon, new energy automobiles become a necessary trend in the traffic field due to own advantages, and the gold stage of development is met. For years, electric vehicles have been the most rapid to develop and the least pollution degree in new energy vehicles, and the importance of charging systems for electric vehicles is self-evident, as market development progresses, the ac charging power is increased from 2kW, 3kW to 6kW, 10kW and 20kW, and the dc charging power is increased from tens of kW to hundreds of kW.
An Insulated Gate Bipolar Transistor (IGBT) in the power semiconductor device has the performances of high current density, low loss, pressure resistance, high temperature resistance, integration and the like, and is widely applied to power supply modules on electric automobiles. In order to construct a safe and reliable charging working environment, the stable operation of the charging pile in different environments is ensured, and the searching of a heat dissipation scheme in the power supply module becomes a difficult problem to be solved in industry.
Disclosure of Invention
The utility model aims to provide a high-power module radiator, which is based on a 3D material adding technology, obtains a better radiating structure under the same volume by a theoretical derivation method, an orthogonal test method and a simulation verification method, remarkably improves the radiating effect and meets the requirements of the interior of a high-power module.
The technical scheme of the utility model is as follows:
the radiator comprises a fin main body and a lattice truss, and has the following specific structure:
the fin main body is of a central main body structure of the radiator, the fin main body is formed by uniformly distributing fins on the top of a fin plate in parallel, the fins are vertical to the fin plate and are of an integrated structure, gaps between adjacent fins form flow channels, each fin is vertically provided with a plate-shaped fin decompression groove, and the side surface of each fin is provided with a disturbing hole; the lattice truss is a core body which is in lattice distribution and connected into a whole, the surface plate is relatively parallel to the fin plate and is arranged at the upper end of the fin, the surface plate is provided with strip-shaped surface plate decompression grooves which are uniformly distributed in parallel, and the surface plate decompression grooves and the fin decompression grooves are vertically corresponding one by one and are communicated to form radiator decompression grooves.
In the high-power module radiator, the side surface of each fin is provided with two layers of turbulence holes which are completely communicated, the turbulence holes are communicated with the fin decompression grooves, and the upper layer of turbulence holes and the lower layer of turbulence holes are staggered.
The high-power module radiator is characterized in that each core body is composed of three core body rod pieces, the upper ends of the three core body rod pieces are converged, and the lower ends of the three core body rod pieces are integrally connected with the surface of the surface plate respectively to form a tetrahedron structure.
The high-power module radiator is characterized in that the lattice truss is in seamless tight connection with the fins of the fin body through the gauge board, and the connection mode is 3D printing or welding, so that an integrated radiator structure is formed.
The fin decompression groove of the high-power module radiator is of a through structure from bottom to top, so that the fin decompression groove forms a hollow cavity of the fin.
The fins of the high-power supply module radiator are 12, the spacing between adjacent fins is 0.96mm, the size of each fin is 1.2mm thick and 14.5mm high.
The design idea of the utility model is as follows:
the high-power module radiator is provided with an upper lattice truss, a lower slotted fin and a heat source, and the specific structural parameters are as follows: a heat sink having dimensions 25mm x 14.5mm, comprising a grooved fin structure of 1.2mm thick, 14.5mm high, 12 fins as a main body of the heat sink structure; in addition, the porosity of the lattice truss is 75%, the diameter of the core rod piece is 1.2mm, the height of the core body is 2.5mm, and the structural angle factor Saf of the lattice truss is=0.68. The fin takes the advantages of high convection heat exchange coefficient and simple structure as a theme, the fin efficiency is reduced along with the change of the fin height, the heat radiating area is increased by introducing the lattice truss, the air flow disturbance is enhanced to enhance the heat conducting performance of the radiator, and the optimization of the traditional heat radiating fin structure is realized.
The utility model has the advantages and beneficial effects that:
according to the utility model, under the premise of ensuring the volume of a power supply module radiator of a charging pile (such as an EVR700-15000 British charging pile module), the conventional fin structure is optimally designed, and the influence of the fin efficiency of the fin structure along with the increase of the fin height is weakened, so that the lattice truss structure, the decompression groove and the turbulent holes are introduced, the disturbance of air flow is enhanced, the area of the radiator is increased, and the heat dissipation performance of the radiator is enhanced.
Description of the drawings:
fig. 1 is a schematic view of a core structure and a schematic view of a flow direction.
Fig. 2 is an isometric view of a fin body of the present utility model.
Fig. 3 is a front view of a fin body of the present utility model.
Fig. 4 is a left side view of the fin body of the present utility model.
Fig. 5 is a top view of a fin body of the present utility model.
Fig. 6 is an isometric view of a lattice truss structure of the utility model.
Fig. 7 is a front view of the lattice truss structure of the present utility model.
Fig. 8 is a left side view of the lattice truss structure of the present utility model.
Fig. 9 is a top view of the lattice truss structure of the present utility model.
Fig. 10 is an isometric view of a high power module heat sink according to the present utility model.
Fig. 11 is a front view of a heat sink for a high power supply module according to the present utility model.
Fig. 12 is a left side view of the high power module heat sink of the present utility model.
Fig. 13 is a top view of a high power module heat sink according to the present utility model.
1-13, 1 fin body, 1.1 fin plate, 1.2 fins, 1.3 turbulator holes, 1.4 flow channels; 1.5 fin decompression grooves, 2 lattice trusses, 2.1 cores, 2.2 surface plates, 2.3 surface plate decompression grooves and 2.4 core rod pieces.
The specific embodiment is as follows:
in order that the nature and advantages of the utility model may be fully understood by the applicant, a detailed description of specific embodiments of the utility model will be presented below with reference to the accompanying drawings, but the description of the examples by applicant is not intended to be a limitation, and any variations in form but not substance, according to the inventive concept should be regarded as being within the scope of the utility model.
In the following description, all concepts related to the directions or azimuths of up, down, left, right, front and rear are based on the positions shown in fig. 1, and thus should not be construed as being particularly limited to the technical solutions provided by the present utility model.
As shown in fig. 1-13, the utility model provides a high-power module radiator, which mainly comprises a fin main body 1 and a lattice truss 2, and has the following specific structure:
the fin main body 1 is a central main body structure of the radiator, the fin main bodies 1 are fins 1.2 which are mutually and uniformly distributed on the top of the fin plate 1.1 in parallel, the fins 1.2 are vertical to the fin plate 1.1 and are of an integrated structure, gaps between adjacent fins 1.2 form flow channels 1.4, and the flow channels 1.4 are used for transferring fin heat from solid to gas and taking away heat through convection; each fin 1.2 is vertically provided with a platy fin decompression groove 1.5, and the fin decompression groove 1.5 is of a through structure from bottom to top, so that the fin decompression groove 1.5 forms a hollow inner cavity of the fin 1.2; the side of each fin 1.2 is provided with an upper layer of disturbing holes 1.3 and a lower layer of disturbing holes, the lower layer of disturbing holes is 6, the upper layer of disturbing holes is 5, the upper layer of disturbing holes 1.3 and the lower layer of disturbing holes are staggered, and the disturbing holes 1.3 are communicated with the fin decompression groove 1.5.
The lattice truss 2 is characterized in that a core body 2.1 which is in lattice distribution and mutually connected into a whole is arranged on a surface plate 2.2, the surface plate 2.2 is relatively parallel to the fin plate 1.1 and is arranged at the upper end of the fin plate 1.2, strip-shaped surface plate decompression grooves 2.3 which are uniformly distributed in parallel are formed in the surface plate 2.2, and the surface plate decompression grooves 2.3 are vertically corresponding to the fin decompression grooves 1.5 one by one and are communicated with each other to form radiator decompression grooves. Each core body 2.1 is composed of three core body rod pieces 2.4, the upper ends of the three core body rod pieces 2.4 are converged, and the lower ends of the three core body rod pieces 2.4 are integrally connected with the surface of the surface plate 2.2 respectively to form a tetrahedron structure.
The lattice truss 2 is in seamless and tight connection with the fins 1.2 of the fin main body 1 through the surface plates 2.2, and the connection mode is 3D printing or welding, so that an integrated radiator structure is formed. Preferably, 3D prints better, can guarantee the wholeness, avoids appearing unnecessary gap.
As shown in fig. 1, the direction a is the air flow direction, and refers to the direction of the narrowest windward mast corresponding to the flow channel 1.4; the direction B is the direction of the widest windward mast; s is S y Represents the distance between the rod bottoms of type II rods (core rod pieces), S x Represents the vertical distance from the type I pole (core rod) to the type II pole, S xy Representing the distance between the rod bottom circular centers of the I and II type rods.
As shown in fig. 1 and 10, the high-power module radiator of the present utility model further includes a heat source, an inlet, and an outlet, and the positions and connection relationships thereof are as follows: the inlet direction is the direction A, parallel to the wind direction and positioned in front of the radiator; the outlet direction is positioned behind the radiator and is parallel to the inlet direction; the heat source is tightly attached to the lower part of the lattice truss type fin radiator through heat conduction silicone grease.
The design method of the high-power module radiator comprises the following steps:
according to the actual application scene, the material of the radiator is pure aluminum, and the heat conductivity is 237W/M.K. The cooling fluid is air, the ambient temperature and the air temperature are set to 26.85 ℃, and the dynamic viscosity of the air parameter is set to 1.7894 multiplied by 10 -5 pa.s, density of 1.205kg/m 3 The thermal conductivity was 0.0257W/M.K, the thermal expansion coefficient was 0.003, and the air flow rate was at a minimum of 2M/s.
The specific structural parameters of the high-power module radiator are as follows: the radiator with the volume of 25mm multiplied by 14.5mm comprises a fin structure with the thickness of 1.2mm, the height of 14.5mm and the up-down through grooves of 12 fins which are distributed at equal intervals of 0.96 mm. The determination method comprises the following steps: and (3) selecting three factors (fin thickness, fin number and fin height) by an orthogonal test method, analyzing a table by a test result extremely-poor method through 16 groups of simulation tests by the orthogonal test method, and finally determining the fin structure.
The decompression groove part of the high-power module radiator is completely communicated, the necessity of increasing the decompression groove is verified, and the temperature simulation results of the decompression groove and the non-decompression groove can be compared through simulation.
1. Radiator fin portion:
regarding the fin thickness of the heat sink, four levels, 1mm, 1.2mm, 1.4mm, 1.6mm, respectively, were selected depending on the processing and strength constraints; regarding the number of fins of the radiator, four levels, 6, 8, 10, 12, respectively, are also selected in consideration of the structural limitation of the module; regarding the fin height of the radiator, too high will affect the size and structure of the radiator, more preferably too low, too low will affect the heat dissipation effect, and is limited by the height of the power module model, so four levels are selected to be 13.5mm, 14mm, 14.5mm and 15mm respectively, and the corresponding factor levels are shown in table 1.
Table 1 radiator structural parameter levels
Tab.1 Radiator structural parameter level
| Test factors | Level i=1 | Level i=2 | Level i=3 | Level i=4 |
| Fin thickness A/mm | 1 | 1.2 | 1.4 | 1.6 |
| Number of fins B/number of fins | 6 | 8 | 10 | 12 |
| Fin height C/mm | 13.5 | 14 | 14.5 | 15 |
The factor level selected in the test is three factors and four factors, so that the orthogonal table L16 (43) can be adopted for combination arrangement, computational Fluid Dynamics (CFD) simulation software is adopted for carrying out optimization simulation on the power supply modules under 16 working conditions according to the arrangement of the orthogonal table, and the obtained results are shown in the table 2.
TABLE 2 orthogonal experimental design and experimental results
Tab.2 Orthogonal experimental design and experimental results
| Column number | j＝1 | j＝2 | j＝3 | Global maximum temperature |
| Factors of | A/mm | B/number | C/mm | T/℃ |
| 1 | 1(1) | 1(6) | 1(13.5) | 62.163 |
| 2 | 1(1) | 2(8) | 2(14) | 50.361 |
| 3 | 1(1) | 3(10) | 3(14.5) | 43.355 |
| 4 | 1(1) | 4(12) | 4(15) | 42.352 |
| 5 | 2(1.2) | 1(6) | 2(14) | 58.732 |
| 6 | 2(1.2) | 2(8) | 1(13.5) | 49.116 |
| 7 | 2(1.2) | 3(10) | 4(15) | 45.525 |
| 8 | 2(1.2) | 4(12) | 3(14.5) | 41.435 |
| 9 | 3(1.4) | 1(6) | 3(14.5) | 56.613 |
| 10 | 3(1.4) | 2(8) | 4(15) | 46.175 |
| 11 | 3(1.4) | 3(10) | 1(13.5) | 43.192 |
| 12 | 3(1.4) | 4(12) | 2(14) | 42.104 |
| 13 | 4(1.6) | 1(6) | 4(15) | 54.267 |
| 14 | 4(1.6) | 2(8) | 3(14.5) | 45.077 |
| 15 | 4(1.6) | 3(10) | 2(14) | 45.655 |
| 16 | 4(1.6) | 4(12) | 1(13.5) | 42.703 |
From the 16 groups of orthogonal experimental designs and experimental results, the fin portion was selected from a structure of 1.2mm thick, 14.5mm high and 12 fins as the main body of the radiator structure.
2. Radiator lattice truss section:
the lattice truss is a lattice sandwich structure (an upper layer plate is removed), namely, the core bodies which are arranged on the surface plate and are in a lattice distribution tetrahedron structure are interconnected into a whole, the core body rod pieces can be made of metal materials with high heat conductivity (such as pure aluminum, etc.), and the lattice clamps can be made of the metal materials with high heat conductivityPorosity epsilon and surface density rho of the core structure SA The expressions are respectively:
wherein V is strusts Is the volume of the core rod piece in the cell, mm 3 ；V cell The volume of the cube occupied by the cells is mm 3 ；S struts Is the surface area of the core rod piece in the cell, mm 3 ；S substrate The surface area of the surface plate corresponding to the cell is mm 2 ；S vertex Is the interface area of the core body and the surface plate, mm 2 The method comprises the steps of carrying out a first treatment on the surface of the Epsilon is porosity,%; ρ SA Is of surface density of mm -1 ；The relative density is dimensionless.
According to a reasonable approximation of the above, the two above-mentioned relations are expressed in particular as:
wherein d is the diameter of the pole and mm;is tetrahedral structure angle, degree; l is the length of the core rod piece, mm; h is the height of the core body, mm.
From formulas (3) and (4), the relationship between the porosity and the surface density can be obtained:
assuming that the rod diameter of the core is a fixed value, the surface density and the porosity are functional relations about the length l of the rod of the core and the height H of the core, the surface density respectively derives l and H, and the maximum value of the surface density is obtained.
Thereby obtaining the relation:
(π+2)l 4 -2(π+1)l 2 H 2 -3πH 4 ＝0#(9)
therefore, when the structural dimension parameter meets the above formula, the corresponding overall heat exchange performance is relatively excellent. Both sides of formula (7) are divided by l 4 The functional relation with H/l as independent variable can be obtained, and H/l=sin theta approximately equal to 0.69 can be obtained, namely, when the tetrahedron structure angle theta is about 44 degrees, the heat exchange performance is relatively better.
The same treatment as above can be achievedNamely, when the angle of the multilayer pyramid lattice sandwich structure is +.>About 0.68, the overall heat exchange performance is relatively excellent.
Definition of the structural Angle factor (Structure langliactor)
The heat dissipation effect is best when the structural angle factor saf=0.68.
And (3) verifying simulation results:
(1) When saf=0.30, the heat dissipation effect of the radiator with the lattice truss is achieved, and the highest heat dissipation temperature of the radiator is 40.193 ℃.
(2) If saf=0.68, the heat dissipation effect of the radiator with the lattice truss is achieved, and the highest heat dissipation temperature of the radiator is 39.395 ℃.
(3) When saf=0.866, the radiator with lattice truss has heat dissipating effect, and the highest heat dissipating temperature of the radiator is 40.271 ℃.
3. Radiator lattice truss grooving part:
the radiator fin structure with the thickness of 1.2mm, the height of 14.5mm, 12 fins and the structural angle factor saf=0.68 is subjected to slotting treatment, and the specific simulation verification effect is as follows: comparison of ungrooved versus grooved treatment shows an optimization in temperature.
Pressure aspect: the comparison between the pre-optimization and the post-optimization shows that the pressure difference is reduced, and the friction factor value is reduced.
4. Radiator spoiler hole portion:
the disturbing holes are completely communicated, the aperture is 1.5mm, the number of first layers is 6, the number of second behaviors is 5, the hole pitch is 3.6mm, and the specific simulation verification effect is as follows:
as can be seen from the comparison of the non-perforated and perforated holes, the temperature is reduced, and a double-sub vortex appears, so that the boundary layer effect is reduced. According to the field synergistic effect, the speed and the temperature gradient are 180 degrees, and the optimal form of the field synergistic effect is met.
When the radiator is used, the whole radiator is arranged on a high-power supply module through heat conduction silicone grease, and at least 2m/s wind speed is used for radiating the whole radiator. The heat of the heat source is firstly subjected to the heat conduction process of the fins and the truss, then is subjected to the convection heat exchange process with the air in the channel, and part of the heat source is directly emitted into the air.
The implementation result shows that the heat dissipation structure is optimized through theory and simulation based on the 3D material adding technology, so that the internal heat dissipation effect of the high-power supply module is effectively improved, the heat dissipation requirement of the high-power supply module radiator in the actual charging pile is met, and the optimization of the traditional fin heat dissipation structure in the high-power supply module under a fixed volume is realized.
Claims (6)
1. The high-power module radiator is characterized by comprising a fin main body and a lattice truss, wherein the specific structure is as follows:
the fin main body is of a central main body structure of the radiator, the fin main body is formed by uniformly distributing fins on the top of a fin plate in parallel, the fins are vertical to the fin plate and are of an integrated structure, gaps between adjacent fins form flow channels, each fin is vertically provided with a plate-shaped fin decompression groove, and the side surface of each fin is provided with a disturbing hole; the lattice truss is a core body which is in lattice distribution and connected into a whole, the surface plate is relatively parallel to the fin plate and is arranged at the upper end of the fin, the surface plate is provided with strip-shaped surface plate decompression grooves which are uniformly distributed in parallel, and the surface plate decompression grooves and the fin decompression grooves are vertically corresponding one by one and are communicated to form radiator decompression grooves.
2. The high-power module radiator according to claim 1, wherein the side surface of each fin is provided with two layers of turbulence holes which are completely communicated with each other, the turbulence holes are communicated with the fin decompression grooves, and the two layers of turbulence holes are staggered.
3. The high-power module radiator according to claim 1, wherein each core is composed of three core rods, the upper ends of the three core rods are gathered, and the lower ends of the three core rods are integrally connected with the surface of the surface plate respectively to form a tetrahedron structure.
4. The high power module radiator of claim 1, wherein the lattice truss is seamlessly and tightly connected with the fins of the fin body through the surface plate in a 3D printing or welding mode to form an integrated radiator structure.
5. The high power module radiator of claim 1, wherein the fin relief groove is of a bottom-up through structure, such that the fin relief groove forms a hollow cavity of the fin.
6. The high power module radiator of claim 1, wherein the fins are 12, the adjacent fins are equally spaced apart by 0.96mm, and each fin has dimensions of 1.2mm thick by 14.5mm high.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321308566.1U CN219961228U (en) | 2023-05-26 | 2023-05-26 | High-power module radiator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321308566.1U CN219961228U (en) | 2023-05-26 | 2023-05-26 | High-power module radiator |
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| CN219961228U true CN219961228U (en) | 2023-11-03 |
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| CN202321308566.1U Active CN219961228U (en) | 2023-05-26 | 2023-05-26 | High-power module radiator |
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