CN109149013A - The pump of semiconductor temperature for electric vehicle drives the two-phase circulatory system and its control method - Google Patents
The pump of semiconductor temperature for electric vehicle drives the two-phase circulatory system and its control method Download PDFInfo
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- CN109149013A CN109149013A CN201811185319.0A CN201811185319A CN109149013A CN 109149013 A CN109149013 A CN 109149013A CN 201811185319 A CN201811185319 A CN 201811185319A CN 109149013 A CN109149013 A CN 109149013A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 43
- 238000010438 heat treatment Methods 0.000 claims abstract description 15
- 238000005057 refrigeration Methods 0.000 claims abstract description 15
- 238000001816 cooling Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 230000036760 body temperature Effects 0.000 claims 1
- 230000009466 transformation Effects 0.000 claims 1
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 5
- 239000012071 phase Substances 0.000 description 31
- 239000007789 gas Substances 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000011555 saturated liquid Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- H01M10/62—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
- H01M10/63—Control systems
-
- 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
- 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
- H01M10/6561—Gases
- H01M10/6563—Gases with forced flow, e.g. by blowers
-
- 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
- H01M10/6569—Fluids undergoing a liquid-gas phase change or transition, e.g. evaporation or condensation
-
- 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
- H01M10/657—Means for temperature control structurally associated with the cells by electric or electromagnetic means
- H01M10/6572—Peltier elements or thermoelectric devices
-
- 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)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to the pumps of semiconductor temperature for electric vehicle to drive the two-phase circulatory system and its control method.System includes battery pack radiator, condensing unit, expansion vessel and the circulating pump being connected by pipeline.The outlet of expansion vessel connects the entrance of circulating pump, and the outlet of circulating pump connects the entrance of battery pack radiator, and the outlet of battery pack radiator connects the entrance of condensing unit, and the outlet of condensing unit connects the entrance one of expansion vessel.Phase-change working substance is filled in battery pack radiator, condensing unit, expansion vessel and pipeline.Semiconductor temperature device is installed on expansion vessel.The present invention passes through the isothermal phase change of the phase-change working substance in battery pack radiator, so that battery cell is under identical heat dissipation boundary condition, to guarantee the temperature uniformity of battery cell；The control of pressure in system and accurate temperature controlling are realized using the refrigeration and heating mode of semiconductor temperature device.
Description
Technical field
The present invention relates to new energy car battery technical field of heat dissipation, and in particular to the pump of semiconductor temperature for electric vehicle
Drive the two-phase circulatory system and its control method.
Background technique
Power battery is referred to as the heart of electric car, is the energy storage device and power producer of electric car, in order to prevent
Battery working performance caused by battery temperature increases, service life and security performance decline, it is necessary to radiate to battery.Due to battery
The space of packet is limited, causes to arrange densification between battery cell, under charging and discharging state or hot environment work, battery cell meeting
A large amount of heat is generated, when heat cannot exclude in time, will lead to battery thermal runaway.If the unevenness of radiator arrangement
It is even, it is easy for leading to the temperature difference of battery cell, efficiency, capacity, service life and the safety of battery can be seriously affected.Therefore,
Power battery heat-radiating device should make to be under similar radiating condition between battery cell as far as possible, guarantee that battery pack is in
Temperature uniformity between suitable temperature range and battery cell.
The power battery temperature range of operation of current several mainstreams are as follows: -20 DEG C of lithium battery ~ 60 DEG C, -20 DEG C of nickel-metal hydride battery ~
60 DEG C, 0 DEG C ~ 45 DEG C of lithium battery, in order to keep the consistency of performance of single battery, temperature uniformity requires to be ± 2 DEG C.In order to make
Power battery works in a suitable environment temperature, gives full play to battery performance and promotes reliability, it is necessary to using reasonable
The power battery heat-radiating device of design.
The cooling of current battery is mainly cooling by air and single-phase liquid is cooling.The cooling sensible heat band for utilizing air of air
Heat is walked, advantage is that structure is simple, at low cost, the disadvantage is that the mass flow of air is big and heat transfer efficiency is low, battery pack radiates
The temperature consistency of device is poor.Cooling liquid includes two kinds of forms of single-phase cooling and Phase cooling, and single-phase cooling utilizes water/second two
The sensible heat of the working medium such as alcohol takes away heat, and it is good that temperature consistency is cooled down than air, the disadvantage is that temperature consistency is by external cooling condition
Influence, while the working medium mass flow of single-phase flow is big, needs additional mechanical power drive liquid flow dynamic, system occupied space
Greatly, at high cost, structure is complicated.
Summary of the invention
The purpose of the present invention is to provide a kind of pumps of semiconductor temperature for electric vehicle to drive the two-phase circulatory system and its control
Method processed, the system and its control method drive two-phase circulation theory using pump, circulate phase-change working substance in the circulatory system,
Realize the heat dissipation of battery pack.
To achieve the above object, the invention adopts the following technical scheme:
The present invention relates to a kind of pumps of semiconductor temperature for electric vehicle to drive the two-phase circulatory system, including the electricity being connected by pipeline
Pond packet radiator, condensing unit, expansion vessel and circulating pump；The outlet of the expansion vessel connects the entrance of circulating pump, circulation
The outlet of pump connects the entrance of battery pack radiator, and the outlet of battery pack radiator connects the entrance of condensing unit, condensing unit
Outlet connect the entrance one of expansion vessel；It is filled in the battery pack radiator, condensing unit, expansion vessel and pipeline
Phase-change working substance；Semiconductor temperature device is installed on the expansion vessel.
Further, which further includes three-way solenoid valve, and the entrance of the three-way solenoid valve connects the outlet of circulating pump, electricity
The outlet one of magnetic triple valve connects the entrance two of expansion vessel, and the outlet two of three-way solenoid valve connects the entrance of battery pack radiator.
Further, the outlet of an expansion vessel entrance for connecing circulating pump by the road, the outlet of circulating pump is by the road
Two connect the entrance of three-way solenoid valve, the outlet one of three-way solenoid valve three entrance two for connecing expansion vessel by the road, three-way solenoid valve
Four entrance for connecing battery pack radiator by the road of outlet two, the outlet of battery pack radiator five connects condensing unit by the road
Entrance, the outlet of condensing unit six entrance one for connecing expansion vessel by the road.
Further, the pipeline one is equipped with temperature sensor one；One He of flowmeter is successively arranged on the pipeline two
Filter one；Flowmeter two and filter two are successively arranged on the pipeline four；Pressure adjusting is successively arranged on the pipeline five
Device and check-valves.
Further, the expansion vessel is equipped with fill port, relief valve and leakage fluid dram, and pressure is equipped in expansion vessel
Force snesor.
Further, offer blow vent on the upper end side wall of the expansion vessel, and the blow vent by pipeline seven with
The entrance of condensing unit is connected, and the pipeline seven is equipped with normally closed solenoid valve.
Further, the battery pack radiator is bonded installation with the battery cell in battery pack.
Further, the condensing unit uses the air cooling equipment with blower and heat exchanger or the liquid cooling apparatus with cold plate.
Further, temperature sensor two is installed in the battery pack.
The invention further relates to the control method that a kind of pump of above-mentioned semiconductor temperature for electric vehicle drives the two-phase circulatory system,
Method includes the following steps:
(1) before starting circulating pump, the pressure P1 in expansion vessel is detected, while detecting the temperature T1 and pump entry of battery pack
The temperature T3 of the phase-change working substance at place.
(2) when the temperature T3 of phase-change working substance is greater than the saturation temperature of the phase-change working substance under pressure P1, start semiconductor control
The refrigeration mode of warm device, reduces system pressure；When the temperature T3 of phase-change working substance is less than the phase-change working substance under pressure P1
When saturation temperature, successively start condensing unit and circulating pump.
(3) after recycling pump startup, battery pack is started to work, and bulk gas is generated in battery pack radiator, due to being
The volume of system is certain, and gas is compressed, and system pressure increases, and three-way solenoid valve is full-gear at this time, in expansion vessel
Phase-change working substance fully enters in battery pack radiator.
(4) the temperature T1 of semiconductor temperature device real-time monitoring battery pack, when the temperature T1 of battery pack is lower than setting value,
Semiconductor temperature device start heating mode, increase system pressure, maintain battery pack in battery cell temperature no longer under
Drop, when the temperature T1 of battery pack is not less than setting value, semiconductor temperature device starts refrigeration mode, drops system pressure
It is low, maintain the temperature of battery cell in battery pack no longer to increase.
From the above technical scheme, the present invention solves the problems, such as batteries of electric automobile packet temperature uniformity, in battery
Phase-change working substance isothermal phase change in packet radiator, ensure that the temperature uniformity of battery cell well；And the matter of phase-change working substance
Measure that flow is small, entire pump drives the volume compact, light-weight of the two-phase circulatory system.The present invention uses the refrigeration of semiconductor temperature device
It is controlled with the pressure in heating mode realization system, so that system pressure is in the saturation pressure of set temperature always, from
And realize accurate temperature controlling.The present invention passes through the isothermal phase change of the phase-change working substance in battery pack radiator, so that at battery cell
Under identical heat dissipation boundary condition, to guarantee the temperature uniformity of battery cell.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Wherein:
1, battery pack radiator, 2, condensing unit, 3, expansion vessel, 4, circulating pump, 5, semiconductor temperature device, 6, battery
Packet, 7, pressure-regulating device, 8, fill port, 9, relief valve, 10, leakage fluid dram, 11, pressure sensor, 12, temperature sensor one,
13, three-way solenoid valve, 14, temperature sensor two, 15, check-valves, 16, normally closed solenoid valve.
Specific embodiment
The present invention will be further described with reference to the accompanying drawing:
A kind of pump of semiconductor temperature for electric vehicle as shown in Figure 1 drives the two-phase circulatory system, including what is be connected by pipeline
Battery pack radiator 1, condensing unit 2, expansion vessel 3 and circulating pump 4, the system are closed system.The expansion vessel 3
Outlet connects the entrance of circulating pump 4, and the outlet of circulating pump 4 connects the entrance of battery pack radiator 1, and battery pack radiator 1 goes out
Mouth connects the entrance of condensing unit 2, and the outlet of condensing unit 2 connects the entrance one of expansion vessel 3.It is the battery pack radiator 1, cold
Phase-change working substance is filled in solidifying device 2, expansion vessel 3 and pipeline.Semiconductor control is installed on the shell of the expansion vessel 3
Warm device 5.The semiconductor temperature device 5 includes power supply, semiconductor chip, refrigerating/heating relay and blower.The power supply
For powering for semiconductor chip, refrigerating/heating relay and blower.The refrigerating/heating relay is connected to power supply and half
Between conductor chip, the sense of current for crossing semiconductor chip for convection current is controlled.After semiconductor temperature device is opened,
Blower is constantly in working condition, for radiating for semiconductor chip.The semiconductor temperature device mainly realizes semiconductor core
The refrigeration and heating function of piece pass through external pressure sensor 11(PT100 sensor), by the temperature controller Predicated execution of system
Refrigeration mode or heating mode start heating mode when temperature saturation temperature corresponding less than container inner pressure, when temperature is big
Start refrigeration mode when container inner pressure corresponding saturation temperature, by the closing and unlatching that control refrigerating/heating relay
The automatic switchover of implementation pattern.Semiconductor temperature device provides heating and refrigeration mode, controls liquid phase-change work in expansion vessel
The evaporation and condensation of matter, to control the pressure of the entire circulatory system.The circulating pump 4 is that pump of the present invention drives two
The power device of the phase circulatory system provides the cycle fluid of certain flow and pressure to overcome the pressure drop of system for system.
After pump of the present invention is driven the evacuation of the two-phase circulatory system, suitable phase-change working substance is charged, is radiated in battery pack
In device, liquid phase-change working medium, which absorbs the heat that battery cell distributes, becomes steam, and steam flows to condensing unit by pipeline,
It is re-cooled the phase-change working substance for liquid in condensing unit, releases heat.Pass through the lasting heat absorption of phase-change working substance, heat release, stream
It is dynamic to complete entire circulation, so that the heat of battery cell in battery pack is dissipated in environment.In phase-change working substance decalescence mistake
Cheng Zhong, pressure and temperature are one-to-one relationships, by the refrigeration and heating of semiconductor temperature device, by the pressure in closed system
Power control in setting value, thus make phase-change working substance in battery pack radiator setting at a temperature of undergo phase transition heat absorption, reality
Existing thermal evenness controlling.
Further, which further includes three-way solenoid valve 13, and the entrance of the three-way solenoid valve 13 meets going out for circulating pump 4
Mouthful, the outlet one of three-way solenoid valve 13 connects the entrance two of expansion vessel 3, and the outlet two of three-way solenoid valve 13 connects battery pack heat dissipation dress
Set 1 entrance.
Further, the outlet of the expansion vessel 3 entrance for connecing circulating pump 4 by the road, the outlet of circulating pump 4 is through pipe
Road two connects the entrance of three-way solenoid valve 13, the outlet one of three-way solenoid valve 13 three entrance two for connecing expansion vessel 3 by the road, electromagnetism
The outlet two of triple valve 13 four entrance for connecing battery pack radiator 1 by the road, the outlet of battery pack radiator 1 by the road five
Connect the entrance of condensing unit 2, the outlet of condensing unit 2 six entrance one for connecing expansion vessel 3 by the road.
Further, the pipeline one is equipped with temperature sensor 1；Flowmeter one is successively arranged on the pipeline two
One DP1 of V1 and filter；Two DP2 of two V2 of flowmeter and filter is successively arranged on the pipeline four；On the pipeline five successively
Equipped with pressure-regulating device 7 and check-valves 15.
Further, the expansion vessel 3 is equipped with fill port 8, relief valve 9 and leakage fluid dram 10, and peace in expansion vessel 3
Equipped with pressure sensor 11.The expansion vessel 3 is the yellow wise man of pressure adjusting that pump of the present invention drives the two-phase circulatory system, interior
A certain amount of liquid phase-change working medium is set, complementary space is saturated vapor.The fill port 8, for being filled with phase into expansion vessel 3
It exchanges work matter.The leakage fluid dram 10, for the phase-change working substance in expansion vessel 3 to be discharged.The relief valve 9, for adjusting expansion
Pressure in container 3.
Further, offer blow vent on the upper end side wall of the expansion vessel 3, and the blow vent by pipeline seven with
The entrance of condensing unit 2 is connected, and the pipeline seven is equipped with normally closed solenoid valve 16.By being opened on the upper end side wall of expansion vessel
If blow vent, and the entrance of the blow vent and condensing unit is connected with pipeline seven, and normally closed solenoid valve, energy are set on pipeline seven
It is enough to ensure system pressure equilibrium before system unlatching.System is necessary to ensure that in pipeline before opening fills full liquid phase working fluid completely,
In order to avoid there are gases in pipeline five, solenoid valve 16, the pressure of balanced condensing unit entrance and expansion vessel, in gravity are opened
The liquid phase working fluid acted in lower expansion vessel can be full of entire pipeline.
Further, the battery pack radiator 1 is bonded installation with the battery cell in battery pack 6.It is dissipated in battery pack
In thermal, the heat of battery cell is taken away in phase-change working substance vaporization heat absorption using the latent heat of phase change of working medium.Phase-change working substance is in battery
Decalescence in packet radiator creates the radiating condition of isothermal to battery cell.
Further, the condensing unit 2 uses the air cooling equipment with blower and heat exchanger or the liquid cooling apparatus with cold plate.
Further, temperature sensor 2 14 is installed in the battery pack 6.
The invention further relates to the control method that a kind of pump of above-mentioned semiconductor temperature for electric vehicle drives the two-phase circulatory system,
Method includes the following steps:
(1) it before starting circulating pump, using the pressure P1 in the pressure sensor detection expansion vessel in expansion vessel, uses simultaneously
Temperature sensor two detects the temperature T1 of battery pack and detects the phase-change working substance at pump entry using temperature sensor one
Temperature T3.The saturation temperature for ensuring the phase-change working substance that temperature T3 is less than under pressure P1, so that it is guaranteed that the phase at pump entry
Matter of exchanging work is liquid, avoids circulating pump sucking gas and damages.
(2) when the temperature T3 of phase-change working substance is greater than the saturation temperature of the phase-change working substance under pressure P1, start semiconductor control
The refrigeration mode of warm device, reduces system pressure；When the temperature T3 of phase-change working substance is less than the phase-change working substance under pressure P1
When saturation temperature, successively start condensing unit and circulating pump.
(3) after recycling pump startup, battery pack is started to work, and bulk gas is generated in battery pack radiator, due to being
The volume of system is certain, and gas is compressed, and system pressure increases, and three-way solenoid valve is full-gear at this time, in expansion vessel
Phase-change working substance fully enters in battery pack radiator.
(4) the temperature T1 of semiconductor temperature device real-time monitoring battery pack, when the temperature T1 of battery pack is lower than setting value,
Semiconductor temperature device start heating mode, increase system pressure, maintain battery pack in battery cell temperature no longer under
Drop, when the temperature T1 of battery pack is not less than setting value, semiconductor temperature device starts refrigeration mode, drops system pressure
It is low, maintain the temperature of battery cell in battery pack no longer to increase.
In addition, in the case where environment temperature T2 is constant, when battery pack operating condition changes, as output power increases
When, battery pack calorific value is consequently increased, and system pressure is promoted, and battery pack temperature T1 can also be increased, at this time semiconductor temperature
Device starts refrigeration mode, reduces system pressure, to maintain the temperature of battery cell in setting value；On the contrary, as exported
When power reduces, battery pack calorific value is also decreased, and phase-change working substance evaporating capacity reduces, so that system pressure reduces, at this time
Three-way solenoid valve can be flowed back to part working medium in expansion vessel by pipeline three, while semiconductor temperature device starts heated mould
Formula increases system pressure, to maintain the temperature of battery cell in battery pack in setting value.
The operation principle of the present invention is that:
The temperature of the phase-change working substance in expansion vessel is precisely controlled in set temperature value by semiconductor temperature device, is made swollen
Phase-change working substance in swollen container is in high pressure saturation state, and makes to be filled with saturated liquid in pipeline.When battery pack radiator
When starting work, liquid phase working fluid is transported in battery pack radiator using circulating pump, phase-change working substance radiates in battery pack to be filled
The heat for setting battery cell in interior absorption battery pack becomes gas-liquid two-phase working medium, gas-liquid two-phase working medium to undergo phase transition heat exchange
Into condensation heat in condensing unit, becoming liquid, expanded container returns to the entrance of circulating pump again, to complete entirely to put
Thermal cycle.
The present invention solves batteries of electric automobile packet temperature uniformity, accurate temperature controlling and lightweight problem, drives two using pump
Phase circulation theory makes phase-change working substance decalescence in battery pack radiator, and the heat dissipation boundary of isothermal is created to battery cell
Condition, to guarantee the temperature uniformity of battery cell；By the heating and refrigeration of semiconductor temperature device, so that expansion vessel
The phase-change working substance fast vaporizing of interior liquid and condensation, so that regulating system pressure is to setting value, so that in battery pack radiator
Interior phase-change working substance decalescence under set temperature value, to realize accurate temperature controlling；Using be much higher than sensible heat latent heat of phase change,
Cycle fluid only needs the mass flow of very little energy band to be walked to the heat of battery, to realize the volume compact of system, light-weight.
Phase cooling takes away heat using the latent heat of phase-change working substance, and advantage is that working medium dosage is few, and utilizes the isothermal object of phase transition process
Reason phenomenon can realize high accuracy temperature control, and system bulk is small, light-weight, high-efficient.Battery pack power density requirements are higher, and pump drives two
The characteristics of phase circuit technology is that working medium dosage is small, small in volume, is radiated particularly suitable for battery pack.
Embodiment described above only describe the preferred embodiments of the invention, not to model of the invention
It encloses and is defined, without departing from the spirit of the design of the present invention, those of ordinary skill in the art are to technical side of the invention
The various changes and improvements that case is made should all be fallen into the protection scope that claims of the present invention determines.
Claims (10)
1. the pump of semiconductor temperature for electric vehicle drives the two-phase circulatory system, it is characterised in that: including the electricity being connected by pipeline
Pond packet radiator, condensing unit, expansion vessel and circulating pump；The outlet of the expansion vessel connects the entrance of circulating pump, circulation
The outlet of pump connects the entrance of battery pack radiator, and the outlet of battery pack radiator connects the entrance of condensing unit, condensing unit
Outlet connect the entrance one of expansion vessel；It is filled in the battery pack radiator, condensing unit, expansion vessel and pipeline
Phase-change working substance；Semiconductor temperature device is installed on the expansion vessel.
2. the pump of semiconductor temperature for electric vehicle according to claim 1 drives the two-phase circulatory system, it is characterised in that: should
System further includes three-way solenoid valve, and the entrance of the three-way solenoid valve connects the outlet of circulating pump, and the outlet one of three-way solenoid valve connects
The entrance two of expansion vessel, the outlet two of three-way solenoid valve connect the entrance of battery pack radiator.
3. the pump of semiconductor temperature for electric vehicle according to claim 2 drives the two-phase circulatory system, it is characterised in that: institute
The outlet of an expansion vessel entrance for connecing circulating pump by the road is stated, the outlet of circulating pump two meets entering for three-way solenoid valve by the road
Mouthful, the outlet one of three-way solenoid valve three entrance two for connecing expansion vessel by the road, the outlet two of three-way solenoid valve four connects by the road
The entrance of battery pack radiator, the outlet of battery pack radiator five entrance for connecing condensing unit by the road, condensing unit
Outlet six entrance one for connecing expansion vessel by the road.
4. the pump of semiconductor temperature for electric vehicle according to claim 3 drives the two-phase circulatory system, it is characterised in that: institute
Pipeline one is stated equipped with temperature sensor one；Flowmeter one and filter one are successively arranged on the pipeline two；The pipeline four
On be successively arranged flowmeter two and filter two；Pressure-regulating device and check-valves are successively arranged on the pipeline five.
5. the pump of semiconductor temperature for electric vehicle according to claim 1 drives the two-phase circulatory system, it is characterised in that: institute
Expansion vessel is stated equipped with fill port, relief valve and leakage fluid dram, and pressure sensor is installed in expansion vessel.
6. the pump of semiconductor temperature for electric vehicle according to claim 1 drives the two-phase circulatory system, it is characterised in that: institute
It states and offers blow vent on the upper end side wall of expansion vessel, and the blow vent is connected by pipeline seven with the entrance of condensing unit,
The pipeline seven is equipped with normally closed solenoid valve.
7. the pump of semiconductor temperature for electric vehicle according to claim 1 drives the two-phase circulatory system, it is characterised in that: institute
It states battery pack radiator and is bonded installation with the battery cell in battery pack.
8. the pump of semiconductor temperature for electric vehicle according to claim 1 drives the two-phase circulatory system, it is characterised in that: institute
Condensing unit is stated using the air cooling equipment with blower and heat exchanger or the liquid cooling apparatus with cold plate.
9. the pump of semiconductor temperature for electric vehicle according to claim 7 drives the two-phase circulatory system, it is characterised in that: institute
It states and temperature sensor two is installed in battery pack.
10. the pump of semiconductor temperature for electric vehicle described in any one drives the two-phase circulatory system according to claim 1 ~ 9
Control method, it is characterised in that: method includes the following steps:
(1) before starting circulating pump, the pressure P1 in expansion vessel is detected, while detecting the temperature T1 and pump entry of battery pack
The temperature T3 of the phase-change working substance at place；
(2) when the temperature T3 of phase-change working substance is greater than the saturation temperature of the phase-change working substance under pressure P1, starting semiconductor temperature dress
The refrigeration mode set, reduces system pressure；When the temperature T3 of phase-change working substance is less than the saturation of the phase-change working substance under pressure P1
When temperature, successively start condensing unit and circulating pump；
(3) after recycling pump startup, battery pack is started to work, and bulk gas is generated in battery pack radiator, due to system
Volume is certain, and gas is compressed, and system pressure increases, and three-way solenoid valve is full-gear at this time, the phase transformation in expansion vessel
Working medium fully enters in battery pack radiator；
(4) the temperature T1 of semiconductor temperature device real-time monitoring battery pack is partly led when the temperature T1 of battery pack is lower than setting value
Body temperature regulating device starts heating mode, increases system pressure, and the temperature of battery cell in battery pack is maintained no longer to decline, when
When the temperature T1 of battery pack is not less than setting value, semiconductor temperature device starts refrigeration mode, reduces system pressure, maintains
The temperature of battery cell no longer increases in battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811185319.0A CN109149013A (en) | 2018-10-11 | 2018-10-11 | The pump of semiconductor temperature for electric vehicle drives the two-phase circulatory system and its control method |
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| CN201811185319.0A CN109149013A (en) | 2018-10-11 | 2018-10-11 | The pump of semiconductor temperature for electric vehicle drives the two-phase circulatory system and its control method |
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| CN109149013A true CN109149013A (en) | 2019-01-04 |
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| CN201811185319.0A Pending CN109149013A (en) | 2018-10-11 | 2018-10-11 | The pump of semiconductor temperature for electric vehicle drives the two-phase circulatory system and its control method |
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| CN111970895A (en) * | 2020-08-03 | 2020-11-20 | 中国电子科技集团公司第十四研究所 | Method for detecting filling amount of large two-phase flow cooling system |
| CN114156566A (en) * | 2022-02-09 | 2022-03-08 | 突破电气（天津）有限公司 | Battery system |
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