CN109301364B - Efficient thermal management device of cylindrical power battery and working method of efficient thermal management device - Google Patents
Efficient thermal management device of cylindrical power battery and working method of efficient thermal management device Download PDFInfo
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- CN109301364B CN109301364B CN201811052526.9A CN201811052526A CN109301364B CN 109301364 B CN109301364 B CN 109301364B CN 201811052526 A CN201811052526 A CN 201811052526A CN 109301364 B CN109301364 B CN 109301364B
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- 238000000034 method Methods 0.000 title claims description 9
- 238000012546 transfer Methods 0.000 claims abstract description 113
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000001816 cooling Methods 0.000 claims description 25
- 239000007791 liquid phase Substances 0.000 claims description 25
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- 229910052782 aluminium Inorganic materials 0.000 claims description 16
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 230000001965 increasing effect Effects 0.000 claims description 9
- 239000002390 adhesive tape Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 238000009834 vaporization Methods 0.000 claims description 5
- 230000008016 vaporization Effects 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 7
- 239000012530 fluid Substances 0.000 description 20
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000002826 coolant Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 239000011259 mixed solution Substances 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6552—Closed pipes transferring heat by thermal conductivity or phase transition, e.g. heat pipes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to the technical field of power batteries, and discloses a high-efficiency heat management device of a cylinder power battery, which comprises the cylinder power battery, a heat pipe and a working medium conveying frame, wherein the working medium conveying frame comprises a working medium pipeline and a plurality of heat transfer plates, the working medium pipeline is communicated with the heat transfer plates, the heat pipe is uniformly arranged to form a plurality of strip-shaped grids, two ends of the heat pipe are respectively connected with two adjacent heat transfer plates, the cylinder power battery is uniformly arranged in the strip-shaped grids, a heat conducting element is further arranged, one vertical side surface of the heat conducting element is attached to the heat pipe, and the other vertical side surface of the heat conducting element is attached to the heat transfer plates. The battery pack is easy to install and convenient to maintain, can solve the problems of heating and heat dissipation of the cylindrical power battery under different working conditions, and controls the highest temperature, the lowest temperature and the whole temperature difference of the battery pack within a safe working range.
Description
Technical Field
The invention relates to the technical field of power batteries, in particular to a high-efficiency thermal management device of a cylindrical power battery and a working method thereof.
Background
With the reduction of fossil fuel energy sources, environmental pollution is increasingly serious, and power batteries become hot spots for research and occupy an increasing proportion. The power battery is a power source of electric equipment such as electric automobiles, hybrid electric automobiles and the like because of the advantages of high energy density, long cycle life, green and environment-friendly performance and the like. However, when the power battery is used, a large amount of heat is generated in the power battery due to some physical or electrochemical reactions, so that the temperature of the battery is increased, the efficiency of the battery is affected by the excessive temperature, and the cycle life of the battery is reduced. In a compact battery pack, uneven battery pack temperature will cause inconsistent discharge, affecting the power output of the battery pack. In some extreme cases, excessive temperatures may even lead to the occurrence of explosion accidents. In addition, in an extremely low-temperature environment, the capacity of the battery can be drastically reduced, the internal resistance can be continuously increased, and the electric automobile cannot be even started directly.
In the current research, the air cooling technology is relatively mature, and because the air heat conduction performance is poor, the heat dissipation effect is not ideal, the air ratio volume is small, and under the condition of a certain flow velocity, a larger sectional area is needed to meet the required air flow, so that the air cooling technology is difficult to adapt to the battery pack with compact structure and high energy density at present. The liquid cooling heat transfer rate is higher, but in practice, the possibility of liquid leakage is higher due to the problems of easy damage of rigid contact between the battery and the cooling plate, and in addition, the adverse factors such as complex structure, larger pressure drop and the like exist. The existing heat management mode is difficult to meet the requirements of safety, high efficiency and energy density.
The heat pipe has good heat conduction performance and small volume. The combination of the heat pipe and the liquid cooling can greatly reduce the complexity of the flow channel. The existing battery thermal management based on the heat pipe has the problems of uneven heat dissipation and the like. Therefore, the battery and cooling liquid combined heat management system of the heat pipe has the advantages of being good in heat conduction performance, small in size, compact in battery pack structure, capable of containing more batteries in the same space, and good in development prospect compared with the existing technology.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a safe, efficient and compact-structure efficient thermal management device for a cylinder power battery.
The aim of the invention is achieved by the following technical scheme: the utility model provides a high-efficient heat management device of cylinder power battery, includes cylinder power battery, heat pipe and working medium carriage, the working medium carriage includes working medium pipeline and many heat transfer plates, working medium pipeline and many heat transfer plates intercommunication, the heat pipe evenly arranges and constitutes many bar grids, the both ends of heat pipe are connected with two adjacent heat transfer plates respectively, cylinder power battery evenly installs in the bar grid, and leaves the clearance between the adjacent cylinder power battery.
Further, from left to right, a first runner is arranged at the inner diagonal of the heat transfer plate arranged at the odd position, a second runner is arranged at the inner diagonal of the heat transfer plate arranged at the even position, the first runner and the second runner are distributed in a crossed mode, the working medium pipeline comprises a first pipeline and a second pipeline, the first pipeline penetrates through one diagonal of the heat transfer plates, the first pipeline is communicated with the first runner, the second pipeline penetrates through the other diagonal of the heat transfer plates, and the second pipeline is communicated with the second runner.
Further, the input end of the first pipeline is communicated with the inclined lower corner of the first runner inside the first heat transfer plate, the input end of the second pipeline is communicated with the inclined lower corner of the second runner inside the tail heat transfer plate, the output end of the first pipeline penetrates through the tail heat transfer plate, and the output end of the second pipeline penetrates through the first heat transfer plate.
Further, the heat pipe comprises a first conduction section, a plurality of battery clamps are welded on the first conduction section, and the cylindrical power battery is clamped in two battery clamps which are oppositely arranged in the strip-shaped grating.
Further, a thermally conductive silicone layer is coated between the first conductive segment and the battery clamp.
Further, the battery clamp is made of an elastic aluminum sheet.
Further, the heat-conducting device further comprises a heat-conducting element, wherein one vertical side surface of the heat-conducting element is attached to the heat pipe, the other vertical side surface of the heat-conducting element is attached to the heat transfer plate, and the attachment position of the heat pipe and the heat-conducting element is a second conduction section.
Further, the heat conducting element is connected with the heat pipe by adopting a heat conducting adhesive tape, and the heat conducting element is connected with the heat transfer plate by adopting a heat conducting adhesive tape.
A working method of a high-efficiency thermal management device of a cylinder power battery comprises the following steps:
the cooling process comprises the following steps: when the working temperature of the cylindrical power battery is increased, each single battery transfers heat to the first conduction section of the heat pipe through the battery clamp in a heat conduction mode, the heat is absorbed by the liquid-phase working medium in the first conduction section, steam generated by the heat absorption and vaporization of the liquid-phase working medium flows to the second conduction section of the heat pipe, and is condensed into the liquid-phase working medium in the second conduction section, and the liquid-phase working medium positioned in the second conduction section is returned to the first conduction section of the heat pipe to absorb heat again due to the capillary force of the liquid-absorption core in the heat pipe; the heat released by condensation is transferred to the heat transfer plate through the heat conducting element; at the same time, the cooling working medium enters the corresponding heat transfer plate from the input end of the first pipeline and the input end of the second pipeline in a convection mode respectively, heat transferred to the heat transfer plate through the heat conducting element is absorbed by the cooling working medium, and the cooling working medium absorbing the heat flows out through the output end of the first pipeline and the output end of the second pipeline, so that the heat transfer plate dissipates heat;
the heating process comprises the following steps: when the cylinder power battery works in a low-temperature environment, heating working medium enters corresponding heat transfer plates from the input end of the first pipeline and the input end of the second pipeline in a convection mode respectively, flows in the first flow channel and the second flow channel in the heat transfer plates, heat of the heating working medium in the heat transfer plates is transferred to the second conduction section of the heat pipe by the heat conducting element, the heat of the heating working medium after heat transfer flows out of the heat transfer plates through the output end of the first pipeline and the output end of the second pipeline, the heat of the second conduction section of the heat pipe is absorbed by liquid phase working medium, the liquid phase working medium absorbing the heat flows to the first conduction section of the heat pipe after vaporization, and is condensed and released in the first conduction section, the released heat is transferred to the cylinder power battery through the battery clamp, so that the temperature of the surrounding environment of the cylinder power battery is improved, and the condensed liquid phase working medium is enabled by capillary force of a liquid absorption core in the heat pipe to flow back to the second conduction section for heat absorption.
Compared with the prior art, the invention has the following advantages:
1. the heat pipe heat exchanger is reasonable in design and simple in structure, the heat pipes are uniformly arranged to form a plurality of strip-shaped grids, two ends of each heat pipe are connected with the heat transfer plates, the cylindrical power batteries are uniformly arranged in the strip-shaped grids, and gaps are reserved among the cylindrical power batteries; the problems of liquid leakage and the like caused by the fact that the battery is in rigid contact with the cooling plate in the prior art are solved, gaps are reserved among the cylinder power batteries, heat dissipation is facilitated, the safety of the thermal management device is effectively improved, the heat pipe is not bent, and good heat conducting performance of the heat pipe is reserved.
2. The working medium conveying frame in the invention adopts a convection mode to divide the fluid working medium into two paths from the input end of the first pipeline and the input end of the second pipeline to enter the heat transfer plates, and adopts a diagonal flow mode in the heat transfer plates, so that the cooling capacity/heat obtained by the battery pack between two adjacent heat transfer plates is relatively uniform, the highest temperature, the lowest temperature and the whole temperature difference of the battery pack can be effectively controlled within a safe working range, and the invention has good application prospect.
3. The elastic aluminum sheet is welded on the heat pipe, and the cylindrical power battery is fixed through the elastic aluminum sheet, so that on one hand, the aluminum sheet has good heat conduction performance, and on the other hand, the elastic aluminum sheet can wrap cylindrical batteries with different diameters and sizes, and has good adaptability; and the aluminum sheet has small mass, and has smaller load compared with other cooling devices with battery clamps, and the structure is more compact, so that the device can accommodate more batteries.
4. The heat conducting elements are closely attached to the heat pipe on one side and the heat transfer plate on the other side, so that heat exchange can be effectively carried out, the heat conducting elements are compactly arranged and fully contacted with the heat transfer plate, the heat transfer area is increased, heat exchange is enhanced, and meanwhile, the heat conducting elements also play a role in fixing the heat pipe.
5. The invention adopts the heat pipe, the elastic aluminum sheet and the heat conducting element to radiate or heat the battery pack, the whole device has compact structure and small occupied space, other parts except the welding of the elastic aluminum sheet on the heat pipe can be stuck and fixed by the heat conducting adhesive tape, and the arrangement is flexible.
6. The invention has simple structure, environmental protection, energy saving, easy installation and convenient maintenance, can solve the problems of heating and heat dissipation of the cylinder power battery pack under different working conditions, and can heat or cool the cylinder power battery by changing the temperature of fluid working medium flowing into the heat transfer plate. The invention can innovatively heat the battery, so that the device can be used in extremely low-temperature environments.
Drawings
FIG. 1 is a schematic diagram of a high efficiency thermal management device for a cylindrical power cell of the present invention;
FIG. 2 is a partial elevation view of the high efficiency thermal management device of the cylindrical power cell of the present invention;
FIG. 3 is a schematic diagram of the construction of the working medium carrier of the present invention;
FIG. 4 is a schematic flow diagram of a fluid working medium in a first conduit and a second conduit according to the present invention;
FIG. 5 is an enlarged view of a portion of a bar-grid mounted cylindrical power cell of the present invention;
in the figure, 1 is a cylinder power battery; 2 is a heat pipe; 201 is a first conductive segment; 202 is a second conductive segment; 3 is a working medium pipeline; 301 is a first pipeline; 302 is a second conduit; 4 is a heat transfer plate; 5 is a battery clamp; 6 is a heat conducting element.
Detailed Description
The invention is further described below with reference to the drawings and examples.
The efficient heat management device of the cylinder power battery as shown in fig. 1 and 2 comprises a cylinder power battery 1, a heat pipe 2 and a working medium conveying frame, wherein the working medium conveying frame comprises a working medium pipeline 3 and four heat transfer plates 4, the working medium pipeline 3 is communicated with the heat transfer plates 4, the heat pipe 2 is uniformly arranged to form a plurality of strip-shaped grids, two ends of the heat pipe 2 are respectively connected with two adjacent heat transfer plates 4, the cylinder power battery 1 is uniformly arranged in the strip-shaped grids, and gaps are reserved between the adjacent cylinder power batteries 1. The heat pipes 2 are uniformly arranged into the strip-shaped grids, the cylindrical power batteries 1 are uniformly arranged in the strip-shaped grids, so that the heat pipe heat management device is compact in structure, can accommodate more cylindrical power batteries 1, is arranged into the strip-shaped grids, gaps are reserved among the cylindrical power batteries 1 arranged in the strip-shaped grids, the heat dissipation efficiency of the cylindrical power batteries 1 is greatly improved, and the problems that liquid leakage and uneven heat dissipation are caused by the fact that the batteries are easily contacted with a cooling plate in rigid mode in the conventional battery heat management device are solved. Wherein the heat pipe 2 is flat.
As shown in fig. 3 and 4, from left to right, a first flow passage is provided at an inner diagonal of the heat transfer plate 4 arranged in an odd number, a second flow passage is provided at an inner diagonal of the heat transfer plate 4 arranged in an even number, the first flow passage and the second flow passage are distributed in a crossing manner, the working fluid pipe 3 includes a first pipe 301 and a second pipe 302, the first pipe 301 penetrates through one diagonal of the plurality of heat transfer plates 4, the first pipe 301 is communicated with the first flow passage, the second pipe 302 penetrates through the other diagonal of the plurality of heat transfer plates 4, the second pipe 302 is communicated with the second flow passage, an input end of the first pipe 301 is communicated with an inclined lower corner of the first flow passage inside the first heat transfer plate 4, an input end of the second pipe 302 is communicated with an inclined lower corner of the second flow passage inside the second heat transfer plate 4, an output end of the first pipe 301 penetrates through the second heat transfer plate 4, and an output end of the second pipe 302 penetrates through the first heat transfer plate 4. The working medium conveying frame is provided with two input ends and two output ends, fluid working medium enters the first heat transfer plate 4 from the input end of the first pipeline, fluid working medium enters the tail heat transfer plate 4 from the input end of the second pipeline, fluid working medium flows in the working medium conveying frame in a diagonal flow mode, and the fluid working medium in the first pipeline and the fluid working medium in the second pipeline are not mixed with each other. The fluid working medium in the working medium conveying frame adopts a diagonal flow flowing mode, namely, the fluid working medium flows in through the diagonal lower corners of the first heat transfer plate 4 of the working medium conveying frame, a part of the fluid working medium flows in the first flow channel in the first heat transfer plate 4 and flows out from the diagonal upper corners of the first heat transfer plate 4, flows to the next heat transfer plate 4 (the third heat transfer plate 4 from left to right) of the first pipeline 301, and the other part of the fluid working medium directly flows to the next heat transfer plate 4 of the first pipeline 301 along the working medium pipeline 3 without passing through the first heat transfer plate 4, so that the fluid working medium in the first pipeline 301 flows out from the diagonal upper corners of the tail heat transfer plate 4; the flowing medium in the second pipeline 302 flows in through the inclined lower corners of the tail-opening heat transfer plates 4 of the working medium conveying frame, a part of the fluid working medium flows in the second flow channels inside the tail-opening heat transfer plates 4 and flows out from the inclined upper corners of the tail-opening heat transfer plates 4, flows to the next heat transfer plate 4 (the second heat transfer plates 4 from left to right) of the second pipeline 302, and the other part of the fluid working medium directly flows to the next heat transfer plates 4 of the second pipeline 302 along the working medium pipeline 3 without passing through the tail-opening heat transfer plates 4, so that all the fluid working medium in the second pipeline 302 flows out from the inclined upper corners of the first heat transfer plates 4. The input ends of the first pipeline 301 and the second pipeline 302 are respectively arranged at the inclined lower corners of the first heat transfer plate 4 and the second heat transfer plate 4, the output ends of the first pipeline 301 and the second pipeline 302 are respectively arranged at the inclined upper corners of the second heat transfer plate 4 and the first heat transfer plate 4, and the purpose of the arrangement is that the flowing and dispersing time of the fluid working medium in the working medium pipeline 3 is long, and the heat exchange effect is good. The diagonal first pipelines 301 of the heat transfer plates 4 arranged in odd numbers are communicated through the first flow passages, the diagonal second pipelines 302 of the heat transfer plates 4 arranged in even numbers are communicated through the second flow passages, and the purpose of the arrangement is that the fluid medium in the working medium conveying frame can flow in a diagonal flow mode, so that the cooling capacity/heat obtained by the battery pack between two adjacent heat transfer plates 4 is relatively uniform, the highest temperature and the whole temperature difference of the battery pack can be effectively reduced, and the invention has good application prospect.
As shown in fig. 1, 2 and 5, the heat pipe 2 includes a first conductive section 201, where a plurality of battery clips 5 are welded on the first conductive section 201, and the cylindrical power battery 1 is clamped in two battery clips 5 that are oppositely arranged in the bar-shaped grid. The battery clamp 5 is made of an elastic aluminum sheet. The elastic aluminum sheet has good heat conduction performance, and the elastic aluminum sheet can wrap the cylinder power batteries 1 with different diameters, so that the elastic aluminum sheet has good adaptability; and the aluminum sheet has small mass, and has smaller load and more compact structure compared with other cooling devices with battery clamps, so that more batteries can be accommodated in the working medium conveying frame. Each cylinder power battery 1 is wrapped and fixed by an elastic aluminum sheet at a certain circumferential angle. The battery clamp 5 is semicircular, the back of the battery clamp 5 is welded to the first conducting section 201, and the inner side of the battery clamp 5 wraps the battery cell.
The gap between the first conductive section 201 of the heat pipe 2 and the battery clip 5 is coated with a thermally conductive silicone layer. The heat conduction silica gel layer can increase the heat transfer area, thereby enhancing the heat exchange.
The heat pipe heat exchanger further comprises a heat conducting element 6, wherein one vertical side surface of the heat conducting element 6 is attached to the heat pipe 2, the other vertical side surface of the heat conducting element 6 is attached to the heat transfer plate 4, the two vertical side surfaces of the heat conducting element 6 are adjacent and perpendicular to each other, and the attached position of the heat pipe 2 and the heat conducting element 6 is a second conducting section 202. The arrangement direction of the heat pipes 2 is also perpendicular to the arrangement direction of the heat transfer plates 4, and the heat conducting element 6 can effectively exchange heat and also can play a role in fixing the heat pipes 2; in addition, the heat conducting elements 6 are closely attached to the heat transfer plate 4, and a plurality of heat conducting elements 6 are compactly arranged and fully contacted with the heat transfer plate 4, so that the heat transfer area is increased, and the heat exchange is enhanced. The cross section of the heat conducting element 6 is a right triangle, the heat conducting element 6 is made of a high heat conducting composite material, the heat resistance is low, and the weight is light.
The heat transfer path of the cylinder power battery 1 is as follows: when the cylinder power battery 1 needs to be cooled, a cooling working medium flows in the heat transfer plate 4, and heat generated by the battery is sequentially transferred to the heat transfer plate 4 through the battery clamp 5, the heat pipe 2 and the heat conducting element 6; the first conducting section 201 of the heat pipe 2 is used as an evaporation section, the liquid phase working medium in the first conducting section 201 absorbs heat and evaporates from the battery clamp 5, the second conducting section 202 of the heat pipe 2 is used as a condensation section, the evaporated working medium in the first conducting section 201 flows to the second conducting section 202 and then condenses and liquefies and releases heat to the heat conducting element 6, the released heat is absorbed by the cooling working medium in the heat transfer plate 4, and the liquefied liquid phase working medium flows back to the first conducting section 201 to absorb heat again;
when the cylinder power battery 1 needs to be heated, a heating working medium flows in the heat transfer plate 4, and heat is sequentially transferred to each cylinder power battery 1 through the heat transfer plate 4, the heat conducting element 6, the heat pipe 2 and the battery clamp 5; wherein the second conducting section 202 of the heat pipe 2 is used as an evaporation section, the liquid phase working medium in the second conducting section 202 of the heat pipe 2 absorbs heat to evaporate and flow to the first conducting section 201 through the heat conducting element 6, the first conducting section 201 of the heat pipe 2 is used as a condensing section, the gaseous working medium in the first conducting section 201 of the heat pipe 2 is condensed and liquefied and releases heat to the battery clamp 5, the battery clamp 5 transfers the absorbed heat to the cylinder power battery 1, the liquefied liquid phase working medium returns to the second conducting section 202 to absorb heat again,
the first conduction section 201 of the heat pipe 2 is welded with an elastic aluminum sheet, and is used as an evaporation section in a cooling working condition and is used as a condensation section in a heating working condition; the second conducting section 202 of the heat pipe 2 is in contact with the heat conducting element 6 and acts as a condensing section during cooling conditions and as an evaporating section during heating conditions.
The heat conducting element 6 is connected with the heat pipe 2 by adopting a heat conducting adhesive tape, and the heat conducting element 6 is connected with the heat transfer plate 4 by adopting a heat conducting adhesive tape. The heat-conducting adhesive tape can enhance heat exchange.
A working method of a high-efficiency thermal management device of a cylinder power battery comprises the following steps:
the cooling process comprises the following steps: when the working temperature of the cylindrical power battery 1 is increased, each single battery transfers heat to the first conducting section 201 of the heat pipe 2 through the battery clamp 5 in a heat conduction mode, the heat is absorbed by the liquid-phase working medium in the first conducting section 201, steam generated by the heat absorption and vaporization of the liquid-phase working medium flows to the second conducting section 202 of the heat pipe 2, the steam is condensed into the liquid-phase working medium in the second conducting section 202, the liquid-phase working medium positioned in the second conducting section 202 is returned to the first conducting section 201 of the heat pipe 2 to absorb heat again due to the capillary force of the liquid-suction core in the heat pipe 2, and the heat released by condensation is transferred to the heat transfer plate 4 through the heat conducting element 6; at the same time, the cooling medium enters the corresponding heat transfer plate 4 from the input end of the first pipeline 301 and the input end of the second pipeline 302 in a convection manner, and the heat transferred to the heat transfer plate 4 through the heat conducting element 6 is absorbed by the cooling medium, and the cooling medium with absorbed heat flows out through the output end of the first pipeline 301 and the output end of the second pipeline 302, so that the heat transfer plate 4 dissipates heat;
the heating process comprises the following steps: when the cylinder power battery 1 works in a low-temperature environment, heating working medium enters the corresponding heat transfer plate 4 from the input end of the first pipeline 301 and the input end of the second pipeline 302 in a convection mode, flows in the first flow channel and the second flow channel in the heat transfer plate 4, heat of the heating working medium in the heat transfer plate 4 is transferred to the second conduction section 202 of the heat pipe 2 by the heat conducting element 6, the heat of the heat-transferred heating working medium flows out of the heat transfer plate 4 through the output end of the first pipeline 301 and the output end of the second pipeline 302, the heat transferred to the second conduction section 202 of the heat pipe 2 is absorbed by liquid-phase working medium, the liquid-phase working medium absorbed with the heat is vaporized and flows to the first conduction section 201 of the heat pipe 2, and is condensed and released in the first conduction section 201, the released heat is transferred to the cylinder power battery 1 through the battery clamp 5, so that the temperature of the surrounding environment of the cylinder power battery 1 is increased, the condensed liquid-phase working medium is reflowed to the second conduction section 202 by the capillary force of the liquid-absorption core in the heat pipe 2.
Wherein, the cooling working medium can be water, water and glycol mixed solution, etc. with the temperature range of 20-30 ℃, the heating working medium can be water, water and glycol mixed solution, etc. with the temperature range of 0-50 ℃. The cylinder power battery can be heated or cooled by changing the temperature of the fluid working medium flowing into the working medium conveying frame. The invention can innovatively heat the battery, so that the device can be used in extremely low-temperature environments.
The above embodiments are preferred examples of the present invention, and the present invention is not limited thereto, and any other modifications or equivalent substitutions made without departing from the technical aspects of the present invention are included in the scope of the present invention.
Claims (7)
1. The utility model provides a high-efficient heat management device of cylinder power battery which characterized in that: the cylinder power battery is uniformly arranged in the strip-shaped grids, and gaps are reserved between the adjacent cylinder power batteries; the working medium pipeline comprises a first pipeline and a second pipeline, wherein the first pipeline penetrates through one diagonal angle of a plurality of heat transfer plates, the first pipeline is communicated with the first pipeline, the second pipeline penetrates through the other diagonal angle of the plurality of heat transfer plates, and the second pipeline is communicated with the second pipeline; the heat pipe comprises a first conduction section, a plurality of battery clamps are welded on the first conduction section, and the cylindrical power battery is clamped in two battery clamps which are oppositely arranged in the strip-shaped grating.
2. The efficient thermal management apparatus for a cylindrical power cell of claim 1, wherein: the input end of the first pipeline is communicated with the inclined lower corner of the first runner inside the first heat transfer plate, the input end of the second pipeline is communicated with the inclined lower corner of the second runner inside the tail heat transfer plate, the output end of the first pipeline penetrates through the tail heat transfer plate, and the output end of the second pipeline penetrates through the first heat transfer plate.
3. The efficient thermal management apparatus for a cylindrical power cell of claim 1, wherein: and a heat-conducting silica gel layer is coated between the first conduction section and the battery clamp.
4. The efficient thermal management apparatus for a cylindrical power cell of claim 1, wherein: the battery clamp is made of an elastic aluminum sheet.
5. The efficient thermal management apparatus for a cylindrical power cell of claim 1, wherein: the heat pipe also comprises a heat conducting element, one vertical side surface of the heat conducting element is attached to the heat pipe, the other vertical side surface of the heat conducting element is attached to the heat transfer plate, and the attaching part of the heat pipe and the heat conducting element is a second conducting section.
6. The efficient thermal management apparatus for a cylindrical power cell as defined in claim 5, wherein: the heat conducting element is connected with the heat pipe by adopting a heat conducting adhesive tape, and the heat conducting element is connected with the heat transfer plate by adopting a heat conducting adhesive tape.
7. A method of operating a high efficiency thermal management device based on a cylindrical power cell as defined in any one of claims 1-6, comprising the steps of:
the cooling process comprises the following steps: when the working temperature of the cylinder power battery is increased, each single battery transmits heat to the first conduction section of the heat pipe through the battery clamp in a heat conduction mode, the heat is absorbed by the liquid phase working medium in the first conduction section, steam generated by the heat absorption and vaporization of the liquid phase working medium flows to the second conduction section of the heat pipe, the steam is condensed into the liquid phase working medium in the second conduction section, the liquid phase working medium positioned in the second conduction section is returned to the first conduction section of the heat pipe to absorb heat again due to the capillary force of the liquid absorption core in the heat pipe, and the heat released by condensation is transmitted to the heat transfer plate through the heat conduction element; at the same time, the cooling working medium enters the corresponding heat transfer plate from the input end of the first pipeline and the input end of the second pipeline in a convection mode respectively, heat transferred to the heat transfer plate through the heat conducting element is absorbed by the cooling working medium, and the cooling working medium absorbing the heat flows out through the output end of the first pipeline and the output end of the second pipeline, so that the heat transfer plate dissipates heat;
the heating process comprises the following steps: when the cylinder power battery works in a low-temperature environment, heating working medium enters corresponding heat transfer plates from the input end of the first pipeline and the input end of the second pipeline in a convection mode respectively, flows in the first flow channel and the second flow channel in the heat transfer plates, heat of the heating working medium in the heat transfer plates is transferred to the second conduction section of the heat pipe by the heat conducting element, the heat of the heating working medium after heat transfer flows out of the heat transfer plates through the output end of the first pipeline and the output end of the second pipeline, the heat of the second conduction section of the heat pipe is absorbed by liquid phase working medium, the liquid phase working medium absorbing the heat flows to the first conduction section of the heat pipe after vaporization, and is condensed and released in the first conduction section, the released heat is transferred to the cylinder power battery through the battery clamp, so that the temperature of the surrounding environment of the cylinder power battery is improved, and the condensed liquid phase working medium is enabled by capillary force of a liquid absorption core in the heat pipe to flow back to the second conduction section for heat absorption.
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| CN109841921A (en) * | 2019-03-19 | 2019-06-04 | 华南理工大学 | A kind of power battery liquid cooling apparatus and its working method |
| US20210257686A1 (en) * | 2020-02-17 | 2021-08-19 | Baidu Usa Llc | Battery cell holder structure with heat transfer assembly |
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