CN115207510A - Aluminum soaking plate with high surface-to-body ratio and high temperature uniformity and thermal management system - Google Patents
Aluminum soaking plate with high surface-to-body ratio and high temperature uniformity and thermal management system Download PDFInfo
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- CN115207510A CN115207510A CN202210621337.9A CN202210621337A CN115207510A CN 115207510 A CN115207510 A CN 115207510A CN 202210621337 A CN202210621337 A CN 202210621337A CN 115207510 A CN115207510 A CN 115207510A
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- 238000002791 soaking Methods 0.000 title claims abstract description 34
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 30
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 239000007788 liquid Substances 0.000 claims abstract description 88
- 238000010521 absorption reaction Methods 0.000 claims abstract description 62
- 239000012071 phase Substances 0.000 claims abstract description 34
- 239000007791 liquid phase Substances 0.000 claims abstract description 28
- 238000009792 diffusion process Methods 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims description 27
- 238000005452 bending Methods 0.000 claims description 25
- 238000005219 brazing Methods 0.000 claims description 10
- 230000000295 complement effect Effects 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
- 239000000110 cooling liquid Substances 0.000 claims 6
- 239000002826 coolant Substances 0.000 description 12
- 230000008859 change Effects 0.000 description 9
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 230000009471 action Effects 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000005213 imbibition Methods 0.000 description 4
- 239000003507 refrigerant Substances 0.000 description 4
- 238000005530 etching Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/63—Control systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20509—Multiple-component heat spreaders; Multi-component heat-conducting support plates; Multi-component non-closed heat-conducting structures
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- Chemical & Material Sciences (AREA)
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- General Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
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- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Abstract
An aluminum soaking plate with high surface-to-body ratio and high temperature uniformity comprises a cover plate, a bottom plate and a liquid absorbing core, wherein the cover plate is fixedly connected with the bottom plate, and a closed heat transfer space is formed between the cover plate and the bottom plate; the heat transfer space is composed of a cold source region and a heat source region, the heat source region comprises a liquid phase absorption region and a gas phase diffusion region, one part of the liquid absorption core is positioned in the liquid phase absorption region, the other part of the liquid absorption core is positioned in the cold source region, and the width of the liquid absorption core is increased in a step shape along the direction from the cold source region to the heat source region; a plurality of first bosses are arranged in the liquid phase absorption region, and a plurality of second bosses are arranged in the gas phase diffusion region. A thermal management system adopts the vapor chamber, and the vapor chamber is positioned between two batteries. The soaking plate provided by the invention has the advantages of large area, small thickness, high compressive strength and good temperature uniformity, and belongs to the technical field of soaking plates.
Description
Technical Field
The invention relates to the technical field of soaking plates, in particular to an aluminum soaking plate with high surface-to-body ratio and high temperature uniformity and a thermal management system.
Background
The soaking plate with internal phase change heat transfer and mass transfer has wide application in heat dissipation of electronic components due to the efficient heat transfer characteristic. With the increasingly high requirements of the market on the appearance of the current electronic component in a flat (thin) shape, the design space requirement is increasingly high, the heat dissipation space is recompressed, and meanwhile, the problem of multiple heat sources exists, so that a soaking plate capable of meeting large-area heat dissipation and high temperature uniformity is urgently needed.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to: the aluminum soaking plate with high surface-to-body ratio and high temperature uniformity and the thermal management system capable of meeting large-area heat dissipation are provided.
In order to achieve the purpose, the invention adopts the following technical scheme: an aluminum soaking plate with high surface-to-body ratio and high temperature uniformity comprises a cover plate with a brazing filler metal layer, a bottom plate with a channel and a liquid absorbing core with a porous structure, wherein the liquid absorbing core is clamped between the cover plate and the bottom plate, and the cover plate is connected with the bottom plate through brazing to form a closed heat transfer space; the cover plate and the bottom plate are both vertically arranged, the heat transfer space consists of a cold source region and a heat source region, the heat source region and the cold source region are distributed from left to right, the heat source region comprises a liquid phase absorption region and a gas phase diffusion region, and the liquid phase absorption region is positioned below the gas phase diffusion region; the bottom plate is provided with a plurality of first bosses, a plurality of second bosses and a plurality of bending bosses, the first bosses are distributed in the lower area of the cold source area and the liquid phase absorption area, the second bosses are distributed in the gas phase diffusion area, and the bending bosses are distributed in the upper area of the cold source area; one part of the liquid absorption core is positioned in the liquid phase absorption area, the other part of the liquid absorption core is positioned in the lower area of the cold source area, the width of the liquid absorption core is increased in a step shape along the direction from the cold source area to the heat source area, a through hole matched with the first boss in shape is formed in the liquid absorption core, and the first boss penetrates through the through hole.
After the structure is adopted, the channel is formed by etching, stamping or machining, the first boss and the second boss are used for supporting the cover plate and the bottom plate, and the compression strength of the whole soaking plate is improved. Secondly, the liquid absorption core is in a step-by-step increasing ladder shape from the cold source to the heat source, on one hand, the farther away from the area of the cold source, the harder the liquid phase is to diffuse and reach, the larger capillary action is needed, and under the condition that the pore diameter of the liquid absorption core cannot be changed, the step-by-step increasing area of the liquid absorption core can form the local capillary action osmotic pressure difference with step change to a certain degree, so that the effect that the liquid phase refrigerant is uniformly distributed in the liquid absorption core is achieved as much as possible, and the local evaporation heat exchange efficiency is improved. On the other hand, the gradient-increased structural form promotes the trend that a strand of gas-phase refrigerant evaporated and separated from the liquid absorption core at the heat source end diffuses towards the cold source while diffusing upwards, so that the gas-phase working medium is prevented from being incapable of flowing back to the cooling area under the action of local high air pressure, the gas-liquid phase change circulation is effectively promoted, the occurrence of local dry burning is greatly reduced, and the integral temperature uniformity is improved.
Preferably, the area occupied by the cold source region is not more than 20% of the area of the base plate, the bending bosses are sequentially arranged, a bending flow channel is formed between every two adjacent bending bosses, one end of each bending flow channel faces the gas phase diffusion region, and the other end of each bending flow channel faces downwards. After the structure is adopted, the gas phase working medium which is transversely diffused to the cold source area in the gas phase diffusion area is smoothly transited to the stable laminar flow through the turning flow channel, is absorbed by the external liquid cooling plate along the way and is condensed on the wall surface of the turning flow channel, and the condensed liquid phase working medium flows to the bottom part and the lower liquid absorbing core along the wall surface under the action of gravity, and meanwhile, the structural strength of the plate body is also considered in the design of the bending flow channel.
Preferably, a first gap is reserved between one end, far away from the hot source region, of the liquid absorption core and the edge of the cold source region, a second gap is reserved between the bottom end of the liquid absorption core and the bottom end of the heat transfer space, and the bottom end of the first gap is communicated with the second gap. After adopting this kind of structure, the liquid phase working medium that flows to first clearance bottom is under the effect of gravity, and is flat to the heat source region through the second clearance, and the liquid pool of the liquid phase supplement source of imbibition core as the top, and liquid phase working medium itself also can be in imbibition core inside along with capillary action infiltration diffusion to whole imbibition core region simultaneously to improve mass transfer efficiency and imbibition core interior liquid phase distribution homogeneity.
Preferably, the first bosses and the second bosses are distributed in a multi-row ladder-shaped manner, and the occupied areas of the first bosses and the second bosses are complementary, so that the first bosses and the second bosses are fully and uniformly arranged on the base plate, two adjacent rows are arranged in a staggered manner, and the number of rows of the first bosses is greater than that of the second bosses. After the structure is adopted, the first bosses and the second bosses form a honeycomb array, so that the cover plate and the bottom plate can be integrally supported better.
Preferably, the first bosses are cylindrical or hexagonal in shape, the distance between two adjacent first bosses is consistent along the vertical direction and the left-right direction, the size of the distance is within 1.8-2.2 times of the diameter of the cross section of each first boss or the diameter of the circumcircle of each first boss, and the height of each first boss is matched with the thickness of the heat transfer space.
Preferably, the second boss is in the shape of a water drop, the second boss comprises a tip part and a head part, the tip part faces the upper part of the cold source area, and the height of the second boss is matched with the thickness of the heat transfer space. With this structure, the second projection is formed into an inclined drop shape so as to match the diffusion direction of the gas-phase refrigerant evaporated from the top end of the wick. On the one hand, the gas phase counter flow (diffusion from the cold source to the heat source) which may occur plays a certain role of blocking and blocking. On the other hand, the air flow is disturbed by the water drop-shaped boss structure, which is equivalent to artificially weakening the turbulence generated by winding the column in the gas phase diffusion process, so that the diffusion flow of the gas phase refrigerant to the cold source can be further strengthened, and the heat transfer efficiency of the gas phase mass transfer in the vapor chamber is improved.
Preferably, the length of the bent flow channel in the vertical direction is greater than two thirds of the length of the cold source region in the vertical direction.
Preferably, the wick is composed of a first stage located at the head end, a second stage located in the middle and a third stage located at the tail end, the widths of the first stage, the second stage and the third stage are sequentially reduced, the number of the second stage is one or more, the third stage is partially located in the cold source region, and the length of the second stage is greater than that of the first stage and that of the third stage.
After the structure is adopted, the specific grading of the step-shaped liquid suction core is matched with the original distribution of the support column array, namely, the height of each layer of step corresponds to the original interval of 1-2 rows of bosses, and the horizontal sectional distance is in a form of short at two ends and long in the middle. Compared with the longer length of the middle section, the shorter length of the cold source end is easier to form osmotic pressure difference of liquid phase diffusing to the heat source area; the farthest heat source area Duan Jiaoduan is to form a certain protruding barrier to ensure that the gas phase backflow direction is uniform from the heat source side to the cold source side, so as to prevent the gas phase from flowing backward, and an excessively large area does not need to be occupied.
Preferably, the thickness of the liquid absorption core is 0.5-1.1 mm, the thickness of the heat transfer space is matched with that of the liquid absorption core, the length of the cover plate is more than 300mm, the space occupied by the liquid absorption core is less than 40% of the heat transfer space, the heat transfer space is filled with a working medium, and the volume of the working medium in a liquid phase state is 100% -200% of the void volume of the liquid absorption core.
The utility model provides a battery thermal management system, adopt foretell aluminium matter soaking plate of high table body ratio and high temperature uniformity, including liquid cooling board, coolant liquid circulation system and a plurality of batteries of arranging in proper order, liquid cooling board fixed connection apron, the position of liquid cooling board is corresponding with the cold source district, form cooling space between liquid cooling board and the apron, the liquid cooling board is equipped with the coolant outlet and the coolant inlet of intercommunication cooling space, the heat source district part of the aluminium soaking plate of high table body ratio and high temperature uniformity is located between two adjacent batteries, coolant liquid circulation system connects coolant inlet and coolant outlet respectively.
In general, the present invention has the following advantages: different areas in the soaking plate have different structural characteristics, and the phase change working medium can spontaneously and efficiently complete phase change circulation under the driving of external temperature difference, so that heat in a heat source is continuously conveyed to the liquid cooling plate to be taken out of the system at low thermal resistance and high temperature uniformity, and the aim of controlling the overall temperature of multiple heat sources is fulfilled.
Drawings
FIG. 1 is an exploded view of an aluminum soaking plate with high surface to volume ratio and high temperature uniformity.
Fig. 2 is a schematic structural diagram of the base plate.
Figure 3 is a schematic diagram of the structure of the connection of the base plate to the wick.
Fig. 4 is a perspective view of a thermal management system.
FIG. 5 is a perspective view of a thermal management system.
Wherein, 1 is a cover plate, 2 is a liquid absorption core, 3 is a bottom plate, 4 is a liquid injection pipe, 5 is a liquid cooling plate, and 6 is a battery. 21 is the first boss, 22 is the second boss, 23 is the bend runner, and 24 is the first clearance.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and detailed description.
Example one
An aluminum soaking plate with high surface-to-body ratio and high temperature uniformity comprises a cover plate with a brazing filler metal layer, a bottom plate with a channel and a liquid absorbing core with a porous structure, wherein the liquid absorbing core is clamped between the cover plate and the bottom plate, and the cover plate is connected with the bottom plate through brazing to form a closed heat transfer space; the cover plate and the bottom plate are both vertically arranged, the heat transfer space is composed of a cold source region and a heat source region, the heat source region and the cold source region are distributed from left to right, the heat source region comprises a liquid phase absorption region and a gas phase diffusion region, and the liquid phase absorption region is positioned below the gas phase diffusion region; the bottom plate is provided with a plurality of first bosses, a plurality of second bosses and a plurality of bending bosses, the first bosses are distributed in the lower area of the cold source area and the liquid phase absorption area, the second bosses are distributed in the gas phase diffusion area, and the bending bosses are distributed in the upper area of the cold source area; one part of the liquid absorption core is positioned in the liquid phase absorption area, the other part of the liquid absorption core is positioned in the lower area of the cold source area, the width of the liquid absorption core is increased in a step shape along the direction from the cold source area to the heat source area, a through hole matched with the first boss in shape is formed in the liquid absorption core, and the first boss penetrates through the through hole.
The cold source area does not exceed 20% of the area of the bottom plate, the bending bosses are sequentially arranged, a bending flow channel is formed between every two adjacent bending bosses, one end of the bending flow channel faces the gas phase diffusion area, and the other end of the bending flow channel faces downwards.
A first gap is reserved between one end, far away from the heat source region, of the liquid absorption core and the edge of the cold source region, a second gap is reserved between the bottom end of the liquid absorption core and the bottom end of the heat transfer space, and the bottom end of the first gap is communicated with the second gap.
The first bosses and the second bosses are distributed in a multi-row ladder shape, and the occupied areas of the first bosses and the second bosses are complementary, so that the first bosses and the second bosses are fully and uniformly arranged on the base plate, two adjacent rows are arranged in a staggered mode, and the number of rows of the first bosses is larger than that of the second bosses.
The first bosses are cylindrical or hexagonal, the distance between two adjacent first bosses is consistent along the vertical direction and the left-right direction, the size of the distance is within the range of 1.8-2.2 times of the diameter of the cross section of each first boss or the diameter of an external circle of each first boss, and the height of each first boss is matched with the thickness of the heat transfer space.
The second boss is the drop form, and the second boss includes point portion and head, and the top of point portion orientation cold source district, the height of second boss and the thickness phase-match in heat transfer space.
The outer edge line of the head part is arc-shaped, the outer edge line of the tip part comprises a horizontal line and an oblique line which have a common vertex, and the included angle between the angle of the oblique line and the horizontal line is 45-60 degrees.
The length of the bending flow channel in the vertical direction is greater than two thirds of the length of the cold source area in the vertical direction.
The wick is composed of a first stage, a second stage and a third step section, wherein the first stage is located at the head end, the second stage is located in the middle, the third step section is located at the tail end, the widths of the first stage, the second stage and the third stage are sequentially reduced, the number of the second stage is one or more, the third step section is partially located in a cold source area, and the length of the second stage is greater than that of the first stage and that of the third stage.
The thickness of the liquid absorption core is 0.5-1.1 mm, the thickness of the heat transfer space is matched with the thickness of the liquid absorption core, the length of the cover plate is larger than 300mm, the space occupied by the liquid absorption core is less than 40% of the heat transfer space, the heat transfer space is filled with a working medium, and the volume of the working medium in a liquid phase state is 100% -200% of the void volume of the liquid absorption core.
The cover plate, the bottom plate and the liquid cooling plate are all made of aluminum.
The bottom plate adopts an aluminum plate with the thickness of 1-1.5 mm as a raw material, and a cavity, a first boss, a second boss and a bending flow channel are obtained on the aluminum plate through an etching process. One end of the bottom plate is also provided with a liquid injection port for connecting a liquid injection pipe.
A layer of brazing material with the thickness of 0.15mm is compounded on the welding surface of the cover plate, and the brazing material can be directly attached to the bottom plate and then welded to form, so that the welding flux coating work is simplified.
The liquid absorption core structure adopts foamed aluminum or foamed titanium with the thickness of 0.5 mm-1.1 mm, and an adaptive structure mutually coupled with the concave-convex structure on the bottom plate is formed by blanking or laser cutting according to the precision requirement. The aperture is 30-200 μm, the porosity is more than 80%, and the thickness is consistent with the etching depth of the bottom plate, so as to ensure the good bonding and firm brazing of the bottom plate and the cover plate, and simultaneously keep the good contact of the liquid absorption core structure with the bottom plate and the cover plate.
The preparation method of the aluminum soaking plate with high surface-to-body ratio and high temperature uniformity comprises the following steps: after the bottom plate, the cover plate and the liquid injection pipe are fastened together by using a die, the bottom plate, the cover plate and the liquid injection pipe are placed in a vacuum furnace and brazed at about 590 ℃, and the brazing materials are ensured to be melted and combined into a whole. And then vacuumizing the heat transfer space through a liquid injection pipe, injecting electronic fluoride liquid (an electrically-insulating and non-flammable phase change working medium), wherein the liquid injection amount is slightly larger than the total liquid absorption amount of the liquid absorption core structure, performing cold welding sealing on the liquid injection pipe, cutting off the protruding part of the liquid injection pipe, and further ensuring the sealing performance of the welding seam of the bottom plate and the cover plate by laser welding.
Example two
The utility model provides a battery thermal management system, adopt a high table body ratio and high temperature uniformity's aluminium matter soaking plate, including liquid cooling board, coolant liquid circulation system and a plurality of batteries of arranging in proper order, liquid cooling board fixed connection apron, the position and the cold source district of liquid cooling board are corresponding, form cooling space between liquid cooling board and the apron, the liquid cooling board is equipped with the coolant outlet and the coolant inlet of intercommunication cooling space, the heat source district part of high table body ratio and high temperature uniformity's aluminium matter soaking plate is located between two adjacent batteries, coolant liquid circulation system connects coolant inlet and coolant outlet respectively.
The embodiment is not described in the first embodiment.
EXAMPLE III
A battery thermal management system adopts an aluminum soaking plate with high surface-to-body ratio and high temperature uniformity, a cold source area corresponds to an external heat source under the reverse working condition, and a low-temperature area is heated through a heat source area of the soaking plate.
And the phase change working medium in the cold source area corresponding to the external heat source enters the gas phase diffusion area along the bent flow channel after being heated and evaporated, and enters the liquid absorption core below under the guidance of the water drop-shaped second boss, and the phase change working medium in the gas phase diffusion area and the liquid absorption core is condensed into a liquid phase by cooling, falls into the second gap at the bottom under the action of gravity, and flows back to the cold source area to complete phase change circulation.
The embodiment is not described in the first embodiment.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. An aluminum soaking plate with high surface-to-body ratio and high temperature uniformity is characterized in that: the heat exchanger comprises a cover plate with a brazing filler metal layer, a base plate with a channel and a liquid absorption core with a porous structure, wherein the liquid absorption core is clamped between the cover plate and the base plate, and the cover plate is connected with the base plate through brazing to form a closed heat transfer space;
the cover plate and the bottom plate are both vertically arranged, the heat transfer space consists of a cold source region and a heat source region, the heat source region and the cold source region are distributed from left to right, the heat source region comprises a liquid phase absorption region and a gas phase diffusion region, and the liquid phase absorption region is positioned below the gas phase diffusion region;
the bottom plate is provided with a plurality of first bosses, a plurality of second bosses and a plurality of bending bosses, the first bosses are distributed in the lower area of the cold source area and the liquid phase absorption area, the second bosses are distributed in the gas phase diffusion area, and the bending bosses are distributed in the upper area of the cold source area;
one part of the liquid absorption core is positioned in the liquid phase absorption area, the other part of the liquid absorption core is positioned in the lower area of the cold source area, the width of the liquid absorption core is increased in a step shape along the direction from the cold source area to the heat source area, a through hole matched with the first boss in shape is formed in the liquid absorption core, and the first boss penetrates through the through hole.
2. An aluminum soaking plate with high surface to body ratio and high temperature uniformity according to claim 1, characterized in that: the cold source area does not exceed 20% of the area of the bottom plate, the bending bosses are sequentially arranged, a bending flow channel is formed between every two adjacent bending bosses, one end of the bending flow channel faces the gas phase diffusion area, and the other end of the bending flow channel faces downwards.
3. An aluminum soaking plate with high surface to body ratio and high temperature uniformity according to claim 1, characterized in that: a first gap is reserved between one end, far away from the hot source region, of the liquid absorption core and the edge of the cold source region, a second gap is reserved between the bottom end of the liquid absorption core and the bottom end of the heat transfer space, and the bottom end of the first gap is communicated with the second gap.
4. An aluminum soaking plate with high surface to body ratio and high temperature uniformity according to claim 1, characterized in that: the first bosses and the second bosses are distributed in a multi-row ladder-shaped mode, the occupied areas of the first bosses and the second bosses are complementary, so that the first bosses and the second bosses are fully and uniformly arranged on the base plate, two adjacent rows are arranged in a staggered mode, and the number of rows of the first bosses is larger than that of the second bosses.
5. An aluminum soaking plate with high surface to body ratio and high temperature uniformity as defined in claim 4, wherein: the first bosses are cylindrical or hexagonal, the distance between two adjacent first bosses is consistent along the vertical direction and the left-right direction, the size of the distance is within the range of 1.8-2.2 times of the diameter of the cross section of each first boss or the diameter of an external circle of each first boss, and the height of each first boss is matched with the thickness of the heat transfer space.
6. An aluminum soaking plate with high surface to body ratio and high temperature uniformity according to claim 1, characterized in that: the second boss is the drop form, and the second boss includes point portion and head, and the top of point portion orientation cold source district, the height of second boss and the thickness phase-match in heat transfer space.
7. An aluminum soaking plate with high surface to body ratio and high temperature uniformity according to claim 2, characterized in that: the length of the bending flow channel in the vertical direction is greater than two thirds of the length of the cold source area in the vertical direction.
8. An aluminum soaking plate with high surface to volume ratio and high temperature uniformity as defined in claim 1, wherein: the wick is composed of a first stage, a second stage and a third step section, wherein the first stage is located at the head end, the second stage is located in the middle, the third step section is located at the tail end, the widths of the first stage, the second stage and the third stage are sequentially reduced, the number of the second stage is one or more, the third step section is partially located in a cold source area, and the length of the second stage is greater than that of the first stage and that of the third stage.
9. An aluminum soaking plate with high surface to body ratio and high temperature uniformity according to claim 1, characterized in that: the thickness of the liquid absorption core is 0.5-1.1 mm, the thickness of the heat transfer space is matched with the thickness of the liquid absorption core, the length of the cover plate is larger than 300mm, the space occupied by the liquid absorption core is less than 40% of the heat transfer space, the heat transfer space is filled with a working medium, and the volume of the working medium in a liquid phase state is 100% -200% of the void volume of the liquid absorption core.
10. A battery thermal management system using the aluminum soaking plate with high surface to body ratio and high temperature uniformity as claimed in any one of claims 1 to 9, characterized in that: the aluminum soaking plate with the high surface area ratio and the high temperature uniformity comprises a liquid cooling plate, a cooling liquid circulating system and a plurality of batteries which are sequentially arranged, wherein the liquid cooling plate is fixedly connected with a cover plate, the position of the liquid cooling plate corresponds to a cold source area, a cooling space is formed between the liquid cooling plate and the cover plate, the liquid cooling plate is provided with a cooling liquid outlet and a cooling liquid inlet which are communicated with the cooling space, the heat source area of the aluminum soaking plate with the high surface area ratio and the high temperature uniformity is partially positioned between two adjacent batteries, and the cooling liquid circulating system is respectively connected with the cooling liquid inlet and the cooling liquid outlet.
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| CN111540977A (en) * | 2020-04-21 | 2020-08-14 | 华南理工大学 | Liquid cooling type thermal management system for power battery and blowing type aluminum soaking plate |
| CN113606970A (en) * | 2021-07-27 | 2021-11-05 | 华南理工大学 | Ultrathin soaking plate and preparation method thereof |
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| JP3164132U (en) * | 2010-09-03 | 2010-11-11 | 奇▲こう▼科技股▲ふん▼有限公司 | Pressure gradient driven plate heat pipe |
| CN102811590A (en) * | 2012-07-31 | 2012-12-05 | 华南理工大学 | Wick structure for vapor chamber |
| CN107401941A (en) * | 2017-08-28 | 2017-11-28 | 华南理工大学 | A kind of ultra-thin soaking plate structure |
| CN207214880U (en) * | 2017-08-28 | 2018-04-10 | 华南理工大学 | A kind of ultra-thin soaking plate structure |
| CN107764116A (en) * | 2017-10-16 | 2018-03-06 | 华南理工大学 | Ultrathin flexible soaking plate and its manufacture method |
| CN108119881A (en) * | 2017-12-19 | 2018-06-05 | 苏州亿拓光电科技有限公司 | LED component soaking plate and LED component with special-shaped capillary flow channel |
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| CN115207510B (en) | 2024-04-19 |
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