CN110010995A - A kind of battery pack thermal management system and its working method based on flat-plate heat pipe - Google Patents
A kind of battery pack thermal management system and its working method based on flat-plate heat pipe Download PDFInfo
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- CN110010995A CN110010995A CN201910279341.XA CN201910279341A CN110010995A CN 110010995 A CN110010995 A CN 110010995A CN 201910279341 A CN201910279341 A CN 201910279341A CN 110010995 A CN110010995 A CN 110010995A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 70
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 70
- 239000010439 graphite Substances 0.000 claims abstract description 70
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 230000005855 radiation Effects 0.000 claims abstract description 8
- 238000007726 management method Methods 0.000 claims description 26
- 239000012530 fluid Substances 0.000 claims description 17
- 238000001816 cooling Methods 0.000 claims description 14
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 230000008676 import Effects 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 8
- 239000002250 absorbent Substances 0.000 claims description 6
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims description 5
- 239000004575 stone Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 239000000178 monomer Substances 0.000 claims description 2
- 239000000741 silica gel Substances 0.000 claims description 2
- 229910002027 silica gel Inorganic materials 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005253 cladding Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 230000009466 transformation Effects 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
- H01M10/60—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
- H01M10/61—Types of temperature control
- H01M10/615—Heating or keeping warm
-
- 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
- H01M10/617—Types of temperature control for achieving uniformity or desired distribution of temperature
-
- 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
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- 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
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
-
- 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
-
- 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
-
- 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
- H01M10/6555—Rods or plates arranged between the 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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
- H01M10/6557—Solid parts with flow channel passages or pipes for heat exchange arranged between the cells
-
- 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
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
-
- 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)
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- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to power battery field of heat management, disclose a kind of battery pack thermal management system based on flat-plate heat pipe, including battery pack, flat-plate heat pipe, U-shaped graphite flake and heat exchanger plates；The battery pack includes multiple single batteries being square, and the U-shaped graphite flake and single battery correspond；The U-shaped graphite flake coats two opposite sides of single battery at least to form a battery unit, and multiple battery units are successively bonded to form a battery module；Multiple described heat exchanger plates are successively spaced setting, and the battery module is set to along its length in the interval of two adjacent heat exchanger plates, and the flat-plate heat pipe is between battery module and heat exchanger plates.The invention also discloses a kind of working methods of battery pack thermal management system based on flat-plate heat pipe, the beneficial effect is that: this system structure is simple, compact, occupied area is small, and while carrying out high efficiency and heat radiation/heating to battery pack, can effectively improve the uniformity of internal battery pack temperature.
Description
Technical field
The present invention relates to power battery field of heat management, and in particular to a kind of battery pack heat management system based on flat-plate heat pipe
System and its working method.
Background technique
As the major impetus source of electric car, the parameter and performance of battery directly affect the dynamic property of electric car,
Safety and economy.Heat can be generated in battery work, increases battery temperature, causes cell voltage to change and is lost with heat
Control；In winter cold district, battery temperature is too low to make battery capacity, power and efficiency for charge-discharge decline, make electric car
Course continuation mileage and the max speed are had a greatly reduced quality.Battery pack temperature is uneven, and it is uneven to will lead to battery power discharge, and single battery
Local temperature difference results even in phenomena such as pressure difference and bloated organizational structure and staff.Therefore, efficient battery thermal management technology is studied to raising
Electric car performance is particularly important.
Heat pipe or cold water pipeline are contacted with battery to the common heat dissipation as battery thermal management, absorb what battery generated
Heat, so that heat exchange area is extremely limited, and heat exchange is concentrated, and temperature distribution is non-uniform inside single battery.When to battery
When heating, it also will appear the phenomenon that increasing temperature difference since heating is concentrated.
Summary of the invention
The purpose of the invention is to overcoming above the shortcomings of the prior art, provide a kind of based on flat-plate heat pipe
Battery pack thermal management system, it is intended to while carrying out high efficiency and heat radiation/heating to single battery, guarantee the uniform of battery pack temperature
Property.Another object of the present invention is to provide a kind of working methods of battery pack thermal management system based on flat-plate heat pipe.
The purpose of the present invention is realized by the following technical solution: a kind of battery pack heat management system based on flat-plate heat pipe
System has the heat exchanger plates for circulating working medium including battery pack, flat-plate heat pipe, U-shaped graphite flake and inside；The battery pack includes
Multiple single batteries being square, the U-shaped graphite flake and single battery correspond, and the U-shaped graphite flake at least coats list
To form a battery unit, multiple battery units are successively bonded to form a battery mould for two opposite sides of body battery
Block；Wherein, the both side plate of each U-shaped graphite flake each parallel to battery module length direction, multiple described heat exchanger plates successively between
Every setting, the battery module is set to along its length in the interval of two adjacent heat exchanger plates, and the flat-plate heat pipe is located at
Between battery module and heat exchanger plates, the one side of the flat-plate heat pipe is fitted closely with U-shaped graphite flake, another side and heat exchange
Plate fits closely.
Further, two opposite sides of the size of the both side plate of the U-shaped graphite flake and single battery match,
So that the both side plate of U-shaped graphite flake coats two opposite sides of single battery completely, the both side plate of the U-shaped graphite flake is equal
It is parallel to the length direction of battery module.
Further, the U-shaped graphite flake coats three adjacent sides of single battery, two of them side phase completely
To setting, and this two sides are parallel to the length direction of battery module, length of another side perpendicular to battery module
Direction, the U-shaped graphite flake has opposite open end and closed end, in same battery module, the open end of U-shaped graphite flake with
The back of the closed end of its adjacent U-shaped graphite flake is bonded, so that four sides of single battery are bonded with U-shaped graphite flake.
Further, there are multiple circulatory flows, each circulatory flow all has opposite set inside the heat exchanger plates
The working medium import set and sender property outlet.
Further, the circulatory flow includes at least two parallel fluid channels, is connected in parallel between each parallel fluid channels, respectively
One end of a parallel fluid channels is connect with working medium import, and the other end of each parallel fluid channels connects with sender property outlet
It connects.
Further, the flat-plate heat pipe is the internal sintered wicks formula vapor chamber flat-plate heat pipe with support column.
Further, the battery module is in rectangular parallelepiped structure.
Further, it is coated between the flat-plate heat pipe and heat exchanger plates between the flat-plate heat pipe and U-shaped graphite flake
Heat conductive silica gel.
A kind of working method of the battery pack thermal management system based on flat-plate heat pipe, includes the following steps,
Radiation processes: when the operating temperature of battery pack is excessively high, the working medium of heat exchanger plates internal circulation flow is cooling working medium, single
The heat that body battery generates successively is transferred to heat exchanger plates by U-shaped graphite flake and flat-plate heat pipe；Meanwhile cooling working medium from working medium into
Mouth flows into, and flows out after absorbing heat from sender property outlet, realizes the cooling to battery pack；In radiation processes, flat-plate heat pipe and U-shaped stone
The side of ink sheet contact is heat-absorbent surface, and the side that flat-plate heat pipe is contacted with heat exchanger plates is heat delivery surface；
Heating process: when battery pack is when low temperature environment works, the working medium of heat exchanger plates internal circulation flow is heating working medium, is added
Hot working fluid is flowed into as heat source from working medium import, is flowed out after releasing heat from sender property outlet；Meanwhile heat is successively by heat exchange
Plate, flat-plate heat pipe and U-shaped graphite flake are transferred to battery pack, realize the heating to battery pack；Heat engineering in, flat-plate heat pipe with
The side of heat exchanger plates contact is heat-absorbent surface, and the side that flat-plate heat pipe is contacted with U-shaped graphite flake is heat delivery surface.
Further, the cooling working medium is water or glycol water, and the heating working medium is that water or ethylene glycol are water-soluble
Liquid.
The present invention has the following advantages compared with the prior art:
1, battery pack thermal management system of the invention, structure is simple, compact, and occupied area is small, arrange it is convenient, flexible and
Highly-safe, manufacturing cost is lower.Graphite flake, flat-plate heat pipe and heat exchanger plates three are combined, on the basis of graphite flake, in conjunction with
The feature that flat-plate heat pipe heat exchange area is big, heat transfer property is strong, so that battery pack temperature is evenly distributed, and single battery is not direct
Contact heat-exchanging plate effectively avoids leakage dangerous, substantially increases the safety of battery thermal management system.
2, the surrounding of the single battery in the present invention is coated by graphite flake, and graphite has good plasticity and toughness,
Frivolous, heating conduction is strong, using graphite as Heat Conduction Material, is conducive to the uniform conductive of heat, effectively improves battery pack temperature
Uniformity.
3, the flat-plate heat pipe in the present invention is the sintered wicks formula vapor chamber flat-plate heat pipe that there is support column in inside；With it is common
Heat pipe is compared, and the flat structure of the heat pipe can have with graphite flake and heat exchanger plates preferably to be contacted；By sintering powder in heat pipe
Manufactured support column can effectively improve the rigidity and critical heat flux density of flat-plate heat pipe, and support column can not only provide the liquid of auxiliary
Body circulation channel, but also additional passage of heat can be provided, to reduce thermal resistance, improve heat exchange efficiency；In flat-plate heat pipe
Portion's working medium is transmitted even heat in the form of phase transformation in vapor chamber, keeps flat-plate heat pipe surface temperature uniform, this is conducive to mention
High battery pack temperature uniformity.
4, the parallel fluid channels arrangement in the heat exchanger plates in the present invention is simple, and flow working medium resistance in flow process is smaller,
Energy loss is smaller, advantageously reduces the secondary energy consumption in heat management system.The material energy conservation and environmental protection used in the present invention, installation
It is easy, easy to maintain, the heat exchange demand of square battery pack under various operating conditions can be solved, guarantees battery in suitable temperature
It works, has broad application prospects in range.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of the battery pack thermal management system according to the present invention based on flat-plate heat pipe；
Fig. 2 shows the top views of Fig. 1；
Fig. 3 shows the explosive view in Fig. 2 at A；
Fig. 4 shows the structural schematic diagram that U-shaped graphite flake is bonded with single battery according to the present invention；
Fig. 5 shows the structural schematic diagram of heat exchanger plates according to the present invention；
Fig. 6 shows the flow schematic diagram of flow working medium in circulatory flow according to the present invention；
In figure, 1 is U-shaped graphite flake；101 be open end；102 be closed end；2 be battery pack；201 be single battery；3 are
Flat-plate heat pipe；4 be heat exchanger plates；401 be circulatory flow；402 be working medium import；403 be sender property outlet；404 be parallel fluid channels.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment:
A kind of battery pack thermal management system based on flat-plate heat pipe as shown in FIG. 1 to FIG. 3, including battery pack 2, plate heat
Pipe 3, U-shaped graphite flake 1 and inside have the heat exchanger plates 4 for circulating working medium；The battery pack 2 includes multiple monomers being square
Battery 201, the U-shaped graphite flake 1 are corresponded with single battery 201, and the U-shaped graphite flake 1 at least coats single battery 201
Two opposite sides to form a battery unit, multiple battery units are successively bonded to form a battery module,
In, the both side plate of U-shaped graphite flake 1 is parallel to the length direction of battery module, and (that is: the both side plate of multiple U-shaped graphite flakes 1 is along electricity
The length direction of pond module is arranged successively) multiple described heat exchanger plates 4 are successively spaced setting, and the battery module is along its length
It is set in the interval of two adjacent heat exchanger plates 4, the flat-plate heat pipe 3 is between battery module and heat exchanger plates 4, the plate
The one side of heat pipe 3 is fitted closely with U-shaped graphite flake 1, and another side is fitted closely with heat exchanger plates 4.201 two sides of single battery
U-shaped graphite flake 1 be bonded with flat-plate heat pipe 3, U-shaped graphite flake 1 is by flat-plate heat pipe 3 and 4 mediate contact of heat exchanger plates, using this knot
Safety problem caused by structure is effectively avoided because of 4 inner flow passage refrigerant leakage of heat exchanger plates.Adjacent battery module is changed using same
Hot plate 4 exchanges heat, so that this system structure is simple, compact, occupied area is small.When 2 temperature of battery pack is higher, single battery
201 heats generated are transferred to flat-plate heat pipe 3 through U-shaped graphite flake 1, and the cooling working medium flowed in subsequent heat exchanger plates 4 is by heat band
It walks, to realize the cooling to battery pack 2；When the operating ambient temperature of battery pack 2 is lower, heater is flowed in heat exchanger plates 4
The heat of matter, heating working medium is transferred to single battery 201 through flat-plate heat pipe 3, U-shaped graphite flake 1, realizes the heating to battery pack 2.
This design arrangement is convenient, flexible and highly-safe, can guarantee that single battery 201 works within the scope of suitable temperature.
The size of the both side plate of the U-shaped graphite flake 1 and two opposite sides of single battery 201 match, so that U
The both side plate of type graphite flake 1 coats two opposite sides of single battery 201 completely, and the both side plate of the U-shaped graphite flake is equal
It is parallel to the length direction of battery module.Heat exchange between U-shaped graphite flake 1 and single battery 201 effect can be improved using this structure
Rate improves the temperature uniformity of single battery 201 itself.
As shown in Figure 3 and Figure 4, the volume that the U-shaped graphite flake 1 wraps up is equal with the volume of single battery 201, so that U
Three adjacent sides of the cladding single battery 201 completely of type graphite flake 1, two of them side is oppositely arranged, and this two sides
Face is parallel to the length direction of battery module, length direction of another side perpendicular to battery module, the U-shaped graphite flake
1 has opposite open end 101 and closed end 102, and in same battery module, the open end 101 of U-shaped graphite flake 1 is adjacent thereto
U-shaped graphite flake 1 closed end 102 back fitting so that four sides of single battery 201 with U-shaped graphite flake 1 paste
It closes.Using this structure, four sides of single battery 201 are surround by U-shaped graphite flake 1, between adjacent single battery 201 mutually
It does not contact, is conducive to reduce interacting between neighboring unit cell 201.Meanwhile U-shaped graphite flake 1 is with good thermally conductive
Performance is conducive to reduce the temperature difference between single battery 201, maintains the temperature uniformity of battery pack 2.
As shown in figure 5, having multiple circulatory flows 401 inside the heat exchanger plates 4, each circulatory flow 401 has
There are the working medium import 402 being oppositely arranged and sender property outlet 403.It multiple circulatory flows 401 be set can be improved in heat exchanger plates 4 and flow work
The uniformity of matter distribution, to improve the heat exchange efficiency of whole system.
As shown in Figure 5 and Figure 6, the circulatory flow 401 includes three parallel fluid channels 404, between each parallel fluid channels 404
Be connected in parallel, one end of each parallel fluid channels 404 is connect with working medium import 402, each parallel fluid channels 404 it is another
One end is connect with sender property outlet 403.Parallel fluid channels 404 are by the way of parallel arrangement, and parallel fluid channels 404 are in rectangle,
Rationally, structure is simple, so that flow working medium resistance in flow process is smaller, energy loss is smaller, advantageously reduces heat for design
Secondary energy consumption in management system.
The flat-plate heat pipe 3 is the internal sintered wicks formula vapor chamber flat-plate heat pipe with support column.With vapor chamber
Flat-plate heat pipe 3 not only plate normal direction have stronger heat-transfer capability, additionally aid by heat source generate heat whole
It is uniformly transferred on a plate, hot spot can be effectively eliminated, improve heat transfer effect；The plate armature of flat-plate heat pipe 3 be also easy to it is U-shaped
Graphite flake 1 and heat exchanger plates 4 contact, and simplify the installation of system.Such flat-plate heat pipe 3 can be from market purchasing.
The battery module is in rectangular parallelepiped structure.The battery module of rectangular parallelepiped structure and the plate armature of flat-plate heat pipe 3
Match, whole system is compact-sized, effectively improves heat exchange efficiency.
Thermal conductive silicon is coated between the flat-plate heat pipe 3 and heat exchanger plates 4 between the flat-plate heat pipe 3 and U-shaped graphite flake 1
Glue.This setting can reduce thermal resistance, improve the heat exchange efficiency of system.
A kind of working method of the battery pack thermal management system based on flat-plate heat pipe, includes the following steps,
Radiation processes: when the operating temperature of battery pack 2 is excessively high, the working medium of 4 internal circulation flow of heat exchanger plates is cooling working medium,
The heat that single battery 201 generates successively is transferred to heat exchanger plates 4 by U-shaped graphite flake 1 and flat-plate heat pipe 3；Meanwhile cooling working medium
It flows into from working medium import 402, goes out after absorbing heat from sender property outlet stream 403, realize the cooling to battery pack 2；In radiation processes,
The side that flat-plate heat pipe 3 is contacted with U-shaped graphite flake 1 is heat-absorbent surface, and the side that flat-plate heat pipe 3 is contacted with heat exchanger plates 4 is heat delivery surface；
Heating process: when battery pack 2 is when low temperature environment works, the working medium of 4 internal circulation flow of heat exchanger plates is heating working medium,
Heating working medium is flowed into as heat source from working medium import 402, is flowed out after releasing heat from sender property outlet 403；Meanwhile heat is successively
By heat exchanger plates 4, flat-plate heat pipe 3 and U-shaped graphite flake 1, it is transferred to battery pack 2, realizes the heating to battery pack 2；Heat engineering
In, the side that flat-plate heat pipe 3 is contacted with heat exchanger plates 4 is heat-absorbent surface, and the side that flat-plate heat pipe 3 is contacted with U-shaped graphite flake 1 is heat release
Face.
The cooling working medium is water or glycol water, and the heating working medium is water or glycol water.Specifically make
Used time, cooling working medium is normal temperature state, and heating working medium uses after can heating.
Above-mentioned specific embodiment is the preferred embodiment of the present invention, can not be limited the invention, and others are appointed
The change or other equivalent substitute modes what is made without departing from technical solution of the present invention, are included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of battery pack thermal management system based on flat-plate heat pipe, it is characterised in that: including battery pack, flat-plate heat pipe, U-shaped stone
Ink sheet and inside have the heat exchanger plates for circulating working medium；The battery pack includes multiple single batteries being square, described U-shaped
Graphite flake and single battery correspond, and the U-shaped graphite flake coats two opposite sides of single battery at least to form
One battery unit, multiple battery units are successively bonded to form a battery module；Multiple described heat exchanger plates, which are successively spaced, to be set
It sets, the battery module is set to along its length in the interval of two adjacent heat exchanger plates, and the flat-plate heat pipe is located at battery
Between module and heat exchanger plates, the one side of the flat-plate heat pipe is fitted closely with U-shaped graphite flake, and another side is tight with heat exchanger plates
Closely connected conjunction.
2. the battery pack thermal management system according to claim 1 based on flat-plate heat pipe, it is characterised in that: the U-shaped stone
The size of the both side plate of ink sheet and two opposite sides of single battery match, so that the both side plate of U-shaped graphite flake is complete
Coat two opposite sides of single battery, the length direction of the both side plate of the U-shaped graphite flake each parallel to battery module.
3. the battery pack thermal management system according to claim 1 based on flat-plate heat pipe, it is characterised in that: the U-shaped stone
Ink sheet coats three adjacent sides of single battery completely, and two of them side is oppositely arranged, and this two sides are parallel to
The length direction of battery module, perpendicular to the length direction of battery module, the U-shaped graphite flake has opposite for another side
Open end and closed end, in same battery module, the closed end of the open end of U-shaped graphite flake U-shaped graphite flake adjacent thereto
Back fitting so that four sides of single battery are bonded with U-shaped graphite flake.
4. the battery pack thermal management system according to claim 1 based on flat-plate heat pipe, it is characterised in that: the heat exchanger plates
Inside has multiple circulatory flows, and each circulatory flow all has the working medium import being oppositely arranged and sender property outlet.
5. the battery pack thermal management system according to claim 4 based on flat-plate heat pipe, it is characterised in that: the recycle stream
Road includes at least two parallel fluid channels, is connected in parallel between each parallel fluid channels, and one end of each parallel fluid channels is and work
Matter import connection, the other end of each parallel fluid channels are connect with sender property outlet.
6. the battery pack thermal management system according to claim 1 based on flat-plate heat pipe, it is characterised in that: the plate heat
Pipe is the internal sintered wicks formula vapor chamber flat-plate heat pipe with support column.
7. the battery pack thermal management system according to claim 1 based on flat-plate heat pipe, it is characterised in that: the battery mould
Block is in rectangular parallelepiped structure.
8. the battery pack thermal management system according to claim 1 based on flat-plate heat pipe, it is characterised in that: the plate heat
Heat conductive silica gel is coated between the flat-plate heat pipe and heat exchanger plates between pipe and U-shaped graphite flake.
9. a kind of work side of the battery pack thermal management system according to claim 1 to 8 based on flat-plate heat pipe
Method, which is characterized in that include the following steps,
Radiation processes: when the operating temperature of battery pack is excessively high, the working medium of heat exchanger plates internal circulation flow is cooling working medium, monomer electricity
The heat that pond generates successively is transferred to heat exchanger plates by U-shaped graphite flake and flat-plate heat pipe；Meanwhile working medium is cooled down from working medium inlet flow
Enter, is flowed out after absorbing heat from sender property outlet, realize the cooling to battery pack；In radiation processes, flat-plate heat pipe and U-shaped graphite flake
The side of contact is heat-absorbent surface, and the side that flat-plate heat pipe is contacted with heat exchanger plates is heat delivery surface；
Heating process: when battery pack is when low temperature environment works, the working medium of heat exchanger plates internal circulation flow is heating working medium, heater
Matter is flowed into as heat source from working medium import, is flowed out after releasing heat from sender property outlet；Meanwhile heat successively passes through heat exchanger plates, puts down
Plate heat pipe and U-shaped graphite flake are transferred to battery pack, realize the heating to battery pack；It heats in engineering, flat-plate heat pipe and heat exchanger plates
The side of contact is heat-absorbent surface, and the side that flat-plate heat pipe is contacted with U-shaped graphite flake is heat delivery surface.
10. the working method of the battery pack thermal management system according to claim 9 based on flat-plate heat pipe, feature exist
In: the cooling working medium is water or glycol water, and the heating working medium is water or glycol water.
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