CN109278497A - A kind of thermal management system of electric automobile and its control method and device - Google Patents
A kind of thermal management system of electric automobile and its control method and device Download PDFInfo
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- CN109278497A CN109278497A CN201811278741.0A CN201811278741A CN109278497A CN 109278497 A CN109278497 A CN 109278497A CN 201811278741 A CN201811278741 A CN 201811278741A CN 109278497 A CN109278497 A CN 109278497A
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- electric motor
- cell circuit
- liquid pump
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- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000002826 coolant Substances 0.000 claims abstract description 41
- 238000001816 cooling Methods 0.000 claims abstract description 40
- 238000004378 air conditioning Methods 0.000 claims abstract description 29
- 239000007788 liquid Substances 0.000 claims description 194
- 238000005086 pumping Methods 0.000 claims description 9
- 239000002131 composite material Substances 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 41
- 230000005611 electricity Effects 0.000 description 12
- HEZMWWAKWCSUCB-PHDIDXHHSA-N (3R,4R)-3,4-dihydroxycyclohexa-1,5-diene-1-carboxylic acid Chemical compound O[C@@H]1C=CC(C(O)=O)=C[C@H]1O HEZMWWAKWCSUCB-PHDIDXHHSA-N 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 6
- 230000001737 promoting effect Effects 0.000 description 6
- 230000017525 heat dissipation Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011217 control strategy Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
- B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
- B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00878—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being temperature regulating devices
- B60H1/00899—Controlling the flow of liquid in a heat pump system
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
- B60H2001/00307—Component temperature regulation using a liquid flow
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The invention discloses a kind of thermal management system of electric automobile and its control method and devices, system includes electric motor loop, cell circuit, air-conditioning cooling circuit, four-way valve and controller, and control method includes: to obtain the coolant temperature of electric motor loop as the first temperature by the first temperature sensor；The coolant temperature of cell circuit is obtained as second temperature by second temperature sensor；The temperature of the battery core of BMS in cell circuit is obtained as third temperature by third temperature sensor；When controller detects that electric motor loop breaks down or cell circuit breaks down, four-way valve is controlled by controller according to the first temperature, second temperature and third temperature and is connected to electric motor loop and cell circuit.The present invention is connected to another circuit by four-way valve to substitute work when electric motor loop is with a loop fault in cell circuit, to protect the circuit of heat management system, extends the service life of vehicle.It the composite can be widely applied to new-energy automobile field.
Description
Technical field
The present invention relates to new-energy automobile field, especially a kind of thermal management system of electric automobile and its control method and dress
It sets.
Background technique
New-energy automobile compares for orthodox car, and complete vehicle structure has not included engine and gearbox.It is whole as a result,
Huge variation has occurred in the heat management framework of vehicle, is replaced by the heat management of electric-control system, motor and battery.In new energy vehicle
Driving procedure in, the heat management of vehicle plays huge effect, to electric motor loop and cell circuit in heat-sinking capability plus
Thermal energy power, energy consumption etc. are proposed more stringent requirement.
In vehicle use process, when liquid pump (such as water pump) failure can not work in heat management control loop
When, vehicle will be unable to radiate, and each element will appear the risk of excess temperature, can seriously affect the use of vehicle, and lead to vehicle performance
It is limited.When serious, it could even be possible to there are the serious phenomenons such as motor excess temperature, battery excess temperature, control element is damaged, is shortened
The service life of vehicle.
Summary of the invention
In order to solve the above technical problems, it is an object of the invention to: a kind of electric car heat pipe with long service life is provided
Reason system and its control method and device.
One aspect of the present invention is adopted the technical scheme that:
A kind of thermal management system of electric automobile, including electric motor loop, cell circuit, air-conditioning cooling circuit, four-way valve and control
Device processed, the electric motor loop include the first liquid feed device, the first liquid pump, electric machine controller, motor, charger, the first temperature
Sensor, radiator and first heat exchanger, the cell circuit include the second liquid feed device, BMS, second temperature sensor,
Heater, second liquid pump and second heat exchanger, the output end of first liquid feed device pass through four-way valve and first
The input terminal of liquid pump connects, and the output end of first liquid pump passes sequentially through electric machine controller, motor, charger, first
Temperature sensor, radiator and first heat exchanger are connect with the input terminal of the first liquid feed device in turn, the output end of the BMS
It is connect by four-way valve with the input terminal of second temperature sensor, the output end of the second temperature sensor passes sequentially through
Heater, second liquid pump, second heat exchanger and the second liquid feed device are connect with the input terminal of BMS in turn, first heat
Exchanger and second heat exchanger are also all connected with air-conditioning cooling circuit, the controller be separately connected four-way valve, the first liquid pump,
Electric machine controller, charger, the first temperature sensor, radiator, BMS, second temperature sensor, heater and second liquid
Pump.
Further, the air-conditioning cooling circuit includes current divider, the first shut-off valve, compressor of air conditioner and the second shut-off valve,
The output end of the input terminal connection compressor of air conditioner of the current divider, the first output end of the current divider pass sequentially through first section
Only valve and First Heat Exchanger are connect with the first input end of compressor of air conditioner in turn, and the second output terminal of the current divider is successively led to
It crosses the second shut-off valve and the second heat exchanger and then is connect with the second input terminal of compressor of air conditioner, the controller is separately connected the
One shut-off valve, compressor of air conditioner and the second shut-off valve.
It further, further include main relay, the first relay, the second relay and third relay, the main relay
Input terminal and the output end of controller connect, the output end of the main relay is separately connected compressor of air conditioner, heater, electricity
Machine controller, BMS, charger, the first relay, the second relay and third relay, the output end of first relay
Connect the input terminal of the first liquid pump, the input terminal of the output end connection second liquid pump of second relay, the third
The input terminal of the output end connection radiator of relay.
Further, further include third temperature sensor, the third temperature sensor respectively with the battery core of BMS and control
Device connection.
Another aspect of the present invention is adopted the technical scheme that:
A kind of control method of thermal management system of electric automobile, comprising the following steps:
The coolant temperature of electric motor loop is obtained as the first temperature by the first temperature sensor；
The coolant temperature of cell circuit is obtained as second temperature by second temperature sensor；
The temperature of the battery core of BMS in cell circuit is obtained as third temperature by third temperature sensor；
When controller detects that electric motor loop breaks down or cell circuit breaks down, according to the first temperature, second
Temperature controls four-way valve by controller with third temperature and is connected to electric motor loop and cell circuit.
Further, described when controller detects that electric motor loop breaks down or cell circuit breaks down, according to
One temperature, second temperature and third temperature control the step for four-way valve is connected to electric motor loop and cell circuit by controller,
It specifically includes:
When controller detects that the first liquid pump breaks down, the first liquid pumping source is disconnected by controller and is stopped
Work order is issued to the first liquid pump；
When controller determine the first temperature be less than first threshold when, by controller control four-way valve disconnect electric motor loop and
The connection of cell circuit；
When controller determine the first temperature be greater than second threshold when, by controller control four-way valve be connected to electric motor loop and
Cell circuit, while second liquid pump is driven by controller and promotes the revolving speed of second liquid pump, and is driven by controller
Radiator radiates；
When controller determines that third temperature is greater than third threshold value, air-conditioning cooling circuit is started to BMS's by controller
Battery core cooling；
When controller determine third temperature be greater than four threshold values when, by controller control four-way valve disconnect electric motor loop and
The connection of cell circuit.
Further, described when controller detects that electric motor loop breaks down or cell circuit breaks down, according to
One temperature, second temperature and third temperature control the step for four-way valve is connected to electric motor loop and cell circuit by controller,
It specifically includes:
When controller detects that second liquid pump breaks down, second liquid pumping source is disconnected by controller and is stopped
It is pumped to second liquid and issues work order；
When controller determine the first temperature less than five threshold values when, by controller control four-way valve be connected to electric motor loop and
Cell circuit, while the first liquid pump is driven by controller and promotes the revolving speed of the first liquid pump, and is driven by controller
Radiator radiates；
When controller determines that the first temperature is greater than six threshold values, first passes through controller starting air-conditioning cooling circuit and drive
First liquid pump work gives electric motor loop cooling, then determines the difference of the first temperature and third temperature less than the in controller
When seven threshold values, four-way valve is controlled by controller and is connected to electric motor loop and cell circuit, while the first liquid is promoted by controller
The revolving speed and driving radiator of body pump radiate.
Further, described when controller detects that electric motor loop breaks down or cell circuit breaks down, according to
One temperature, second temperature and third temperature control the step for four-way valve is connected to electric motor loop and cell circuit by controller,
It specifically includes:
When controller detects that second liquid pump breaks down, second liquid pumping source is disconnected by controller and is stopped
It is pumped to second liquid and issues work order；
When the temperature difference of controller the first temperature of judgement and second temperature is less than eight threshold values, four-way is controlled by controller
Valve is connected to electric motor loop and cell circuit, while driving the first liquid pump by controller and promoting the revolving speed of the first liquid pump；
When the temperature difference of controller the first temperature of judgement and second temperature is greater than nine threshold values, it is empty to first pass through controller starting
It adjusts cooling circuit and drives the first liquid pump work, cool down to electric motor loop, then determine the first temperature and second in controller
The temperature difference of temperature controls four-way valve by controller and is connected to electric motor loop and cell circuit less than the tenth threshold value, while passing through control
Device processed promotes the revolving speed of the first liquid pump；
When detecting third temperature after preset time less than 11 threshold value, by controller heater into
Row heating.
Another aspect of the present invention is adopted the technical scheme that:
A kind of control method of thermal management system of electric automobile, comprising the following steps:
The coolant temperature of electric motor loop is obtained as the first temperature；
The coolant temperature of cell circuit is obtained as second temperature；
The temperature of the battery core of BMS in cell circuit is obtained as third temperature；
When detecting that electric motor loop breaks down or cell circuit breaks down, according to the first temperature, second temperature and
Third temperature controls four-way valve connection electric motor loop and cell circuit.
Another aspect of the present invention is adopted the technical scheme that:
A kind of control device of thermal management system of electric automobile, comprising:
At least one processor, for storing program；
At least one processor realizes a kind of electric car heat management system of the present invention for executing described program
The control method of system.
The beneficial effects of the present invention are: a kind of thermal management system of electric automobile of the present invention and its control method and device,
Four-way valve connection electric motor loop and cell circuit are controlled when electric motor loop or cell circuit break down, in electric motor loop and battery
Another circuit is connected to substitute work by four-way valve when a loop fault in circuit, to protect heat management system
Circuit, avoid influence of the fault loop to vehicle performance, extend the service life of vehicle.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of thermal management system of electric automobile provided in an embodiment of the present invention；
Fig. 2 is the complete machine architecture diagram of thermal management system of electric automobile provided in an embodiment of the present invention；
Fig. 3 is a kind of flow chart of the control method of thermal management system of electric automobile provided in an embodiment of the present invention；
Fig. 4 is another flow chart of the control method of thermal management system of electric automobile provided in an embodiment of the present invention；
Fig. 5 is the structural block diagram of the control device of thermal management system of electric automobile provided in an embodiment of the present invention.
Specific embodiment
Referring to Figures 1 and 2, the embodiment of the invention provides a kind of thermal management system of electric automobile, including electric motor loop, electricity
Pond circuit, air-conditioning cooling circuit, four-way valve 1 and controller, the electric motor loop include the first liquid feed device, the first liquid pump 2,
Electric machine controller IPU, motor, charger DCDC/CCS, the first temperature sensor, radiator and first heat exchanger 3, the electricity
Pond circuit includes the second liquid feed device, BMS, second temperature sensor, heater, second liquid pump 4 and second heat exchanger 5,
The output end of first liquid feed device is connect by four-way valve 1 with the input terminal of the first liquid pump 2, first liquid
Pump 2 output end pass sequentially through electric machine controller IPU, motor, charger DCDC/CCS, the first temperature sensor, radiator and
First heat exchanger 3 is connect with the input terminal of the first liquid feed device in turn, the output end of the BMS by four-way valve 1 with
The input terminal of second temperature sensor connects, and the output end of the second temperature sensor passes sequentially through heater, second liquid
Pump 4, second heat exchanger 5 and the second liquid feed device are connect with the input terminal of BMS in turn, the first heat exchanger 3 and second
Heat exchanger 5 is also all connected with air-conditioning cooling circuit, and the controller is separately connected four-way valve 1, the first liquid pump 2, motor control
Device IPU, charger DCDC/CCS, the first temperature sensor, radiator, BMS, second temperature sensor, heater and the second liquid
Body pump.
Specifically, as shown in Figure 1, the thermal management system of electric automobile of the present embodiment is broadly divided into following five part:
(1) electric motor loop.
Electric motor loop mainly includes the high tension apparatus such as electric machine controller IPU, motor, charger DCDC/CCS, heat dissipation side
Formula is that the thermal balance in circuit is carried out using the first liquid pump 2, when circuit liquid temperature is more than a certain threshold value and the work of the first liquid pump 2
When, starting radiator cools down to the coolant liquid in circuit, and drives coolant liquid circulation by the first liquid pump 2.
As shown in Figure 1, electric motor loop specifically includes:
1) the first liquid feed device: input/output terminal is connect with first heat exchanger 3 and four-way valve respectively, for accommodating and mending
The breathing amount for repaying coolant liquid in electric motor loop, also provides for coolant liquid.Expansion kettle can be used in first liquid feed device.
2) the first liquid pump 2: input/output terminal is connect with four-way valve and electric machine controller IPU respectively, for realizing motor
The coolant liquid in circuit recycles, and carries out thermal balance.First liquid pump 2 is corresponding with coolant liquid, such as coolant liquid is water, then the first liquid
Body pump 2 can be water pump.
3) electric machine controller IPU: input/output terminal is connect with the first liquid pump 2 and motor respectively, is used for driving motor.
4) motor: input/output terminal is connect with electric machine controller IPU and charger DCDC/CCS respectively, for being electronic vapour
Vehicle provides power resources.
5) charger DCDC/CCS: input/output terminal is connect with motor and the first temperature sensor respectively, for being electronic
The battery of automobile charges, and is that first temperature sensor etc. provides required power supply by DC-DC DC converting.
6) the first temperature sensor: input/output terminal is connect with charger DCDC/CCS and radiator respectively, for detecting
The coolant temperature of electric motor loop.
7) radiator: input/output terminal is connect with the first temperature sensor and first heat exchanger 3 respectively, for motor
The coolant liquid in circuit cools down.Electronic fan can be used to realize in radiator.
8) first heat exchanger 3: input/output terminal is connect with radiator and the first liquid feed device respectively, is used for and air-conditioning cold
But circuit carries out heat exchange.
(2) cell circuit.
Cell circuit is mainly used for being heated or cooled for BMS, drives coolant liquid circulation to realize by second liquid pump 4.Such as
Shown in Fig. 1, cell circuit is specifically included:
1) the second liquid feed device: input/output terminal is connect with second heat exchanger 5 and BMS respectively, for accommodating and compensating
The breathing amount of coolant liquid, also provides for coolant liquid in cell circuit.Expansion kettle can be used in second liquid feed device.
2) BMS: battery management system, input/output terminal is connect with the second liquid feed device and four-way valve respectively, for feeding back
BMS current working condition (such as battery core temperature).BMS is mainly used for accurate measurement battery pack behaviour in service in Vehicular system,
Protect the inexcessive charge and discharge of battery, the electricity of each battery and the electricity of analytical calculation battery pack be simultaneously in balancing battery group
It is converted to and drives intelligible continuation of the journey force information, it is ensured that power battery can be safely operated.It include battery core inside BMS, daily
Vehicle use process in, need to control the temperature of battery core in optimal operating temperature range, to play its optimal work
Performance.For this purpose, the present invention is additionally arranged the third temperature sensor for real-time detection battery core temperature inside BMS.
3) second temperature sensor: input/output terminal is connect with four-way valve and heater respectively, for detecting cell circuit
Coolant temperature.
4) heater: input/output terminal is connect with second temperature sensor and second liquid pump 4 respectively, is used for response control
Device is sent to the heat request of BMS, is heated.Ptc heater can be used in heater.
5) second liquid pump 4: input/output terminal is connect with heater and second heat exchanger 5 respectively, for realizing battery
The coolant liquid in circuit recycles, to carry out thermal balance.Second liquid pump is 4 corresponding with coolant liquid, such as coolant liquid is water, then and second
Liquid pump 4 can be water pump.
6) second heat exchanger 5: input/output terminal respectively with second liquid pump 4 and second liquid feed device connect, be used for
Air-conditioning cooling circuit carries out heat exchange.
(3) air-conditioning cooling circuit: for passing through first heat exchanger 3 and second heat exchanger 5 and electric motor loop respectively
Heat exchange is carried out with cell circuit, to realize the rapid cooling function in 2 circuits, motor or battery is then protected, prevented
Temperature.
(4) four-way valve 1: for electric motor loop and cell circuit to be together in series.When 2 circuits are without interaction, close
Four-way valve, 2 circuit independent controls, the o foot of four-way valve 1 is connected to p foot at this time, and s foot is connected to t foot；When 2 circuits need to hand over
When mutual, four-way valve is opened, 2 circuits are merged into single control loop, the o foot of four-way valve 1 is connected to t foot at this time, p foot and s foot
Connection carries out substitution work using another circuit device, realizes protection when can be applicable to the liquid pump failure of certain primary Ioops
Function.
(5) controller: the logic control core of system, respectively with heater, air-conditioning cooling circuit, radiator, first temperature
Spend sensor, second temperature sensor, third temperature sensor, BMS, electric machine controller, charger, the first liquid pump and second
The electrical connection such as liquid pump, for sending heat request to heater, being sent out to the request of air-conditioning cooling circuit transmission refrigeration, to radiator
Temperature, the temperature of acquisition second temperature sensor and the acquisition third temperature sent radiating and cooling request, obtain the first temperature sensor
It spends the temperature of sensor and controls four-way valve connection or disconnect electric motor loop and cell circuit etc..VCU can be used in controller.
The coolant liquid of the present embodiment can flexibly be chosen according to the actual needs, and usually optional water is as coolant liquid.
(heavy black is bus in Fig. 2) as shown in Figure 2, BMS, electric machine controller, charger, compressor of air conditioner, heater
It is communicated to connect etc. Can bus can be passed through with controller.
As shown in the above, the present embodiment utilizes four-way valve, and electric motor loop and cell circuit are carried out simultaneous, realized
The function that 2 heat management circuits can be controlled simultaneously, effectively liquid pump etc. occur in each circuit device can not work normally
Failure when, substituted by the liquid pump in another circuit, realize the logic control of loop protection function.
Referring to Figures 1 and 2, it is further used as preferred embodiment, the air-conditioning cooling circuit includes current divider 6,
One shut-off valve 7, compressor of air conditioner 8 and the second shut-off valve 9, the output of the input terminal connection compressor of air conditioner 8 of the current divider 6
End, the first output end of the current divider 6 pass sequentially through the first shut-off valve 7 and First Heat Exchanger 3 so that with compressor of air conditioner 8
First input end connection, the second output terminal of the current divider 6 pass sequentially through the second shut-off valve 9 and the second heat exchanger 5 so that with
Second input terminal of compressor of air conditioner 8 connects, and the controller is separately connected the first shut-off valve 7, compressor of air conditioner 8 and second section
Only valve 9.
Specifically, each main component effect of air-conditioning cooling circuit is as follows:
1) current divider 6: input terminal is connect with compressor of air conditioner 8, output end respectively with the first shut-off valve 7 and the second shut-off valve
9 connections will exchange heat with electric motor loop and exchange heat the two processes with cell circuit for air-conditioning cooling circuit to be divided into two
It distinguishes.
2) the first shut-off valve 7: input/output terminal is connect with current divider 6 and first heat exchanger 3 respectively, for individually controlling
The circuit to exchange heat in air-conditioning cooling circuit with electric motor loop.
3) compressor of air conditioner 8: output end is connect with current divider 6, and input terminal is handed over first heat exchanger 3 and the second heat respectively
Parallel operation 5 connects, and requests for response controller to the refrigeration of electric motor loop and/or cell circuit.Compressor of air conditioner 8 plays compression system
The effect of cryogen can provide power for entire air-conditioning cooling circuit.
Second shut-off valve 9: input/output terminal is connect with current divider 6 and second heat exchanger 5 respectively, empty for individually controlling
Adjust the circuit in cooling circuit with cell circuit heat exchange.
The compressor of air conditioner cooling circuit of the present embodiment can pass through first heat exchanger 3, second heat exchanger 5 and electricity respectively
Machine circuit, cell circuit carry out heat exchange.The circuit shares a compressor of air conditioner, individually controls 2 using 2 shut-off valves
Circuit, cooperation current divider will exchange heat with electric motor loop and distinguish with cell circuit the two processes that exchange heat.
Referring to Fig. 2, it is further used as preferred embodiment, further includes main relay, the first relay, the second relay
With third relay, the input terminal of the main relay and the output end of controller are connected, the output end point of the main relay
It Lian Jie not compressor of air conditioner, heater, electric machine controller, BMS, charger, the first relay, the second relay and third relay
Device, the output end of first relay connect the input terminal of the first liquid pump, the output end connection of second relay the
The input terminal of two liquid pumps, the input terminal of the output end connection radiator of the third relay.
Specifically, the output end of main relay, input terminal and controller connects, output end be separately connected compressor of air conditioner,
Heater, electric machine controller, BMS, charger, the first relay, the second relay and third relay are used for response controller
Request, to compressor of air conditioner, heater, electric machine controller, BMS, charger, the first relay, the second relay and third
Relay carries out switch control.
First relay, the second relay and third relay, input terminal are connect with main relay, and output end respectively corresponds
The first liquid pump, second liquid pump and radiator are connected, for carrying out respectively to the first liquid pump, second liquid pump and radiator
Independent switch control.
Existing relay can be used to realize in main relay, the first relay, the second relay and third relay.
Referring to Fig. 2, it is further used as preferred embodiment, further includes third temperature sensor, the third temperature passes
Sensor is connect with the battery core of BMS and controller respectively.
Specifically, third temperature sensor is set to the inside of BMS, the temperature of the battery core for obtaining BMS.
Referring to Fig. 3, the embodiment of the invention provides a kind of control methods of thermal management system of electric automobile, including following step
It is rapid:
S201, the coolant temperature of electric motor loop is obtained as the first temperature by the first temperature sensor；
S202, the coolant temperature of cell circuit is obtained as second temperature by second temperature sensor；
S203, the temperature of the battery core of BMS in cell circuit is obtained as third temperature by third temperature sensor；
S204, when controller detects that electric motor loop breaks down or cell circuit breaks down, according to the first temperature,
Second temperature controls four-way valve by controller with third temperature and is connected to electric motor loop and cell circuit.
Specifically, electric motor loop breaks down including failures such as the first liquid failure of pump, radiator failures, wherein to motor
What circuit heat dissipation was affected is the first liquid failure of pump.
Cell circuit breaks down including failures such as second liquid failure of pump, heater failures, wherein dissipating to cell circuit
Biggish heat affecting is second liquid failure of pump.
Four-way valve is connected to electric motor loop and cell circuit, it is therefore an objective to regard electric motor loop and cell circuit as one by series connection
A circuit is come while being controlled, and when the device in a circuit sends failure in this way, can be replaced with the device in another circuit
Foundry is made.
As shown in the above, the present embodiment controls four-way valve connection electricity when electric motor loop or cell circuit break down
Machine circuit and cell circuit are connected to another time by four-way valve when electric motor loop is with a loop fault in cell circuit
Road substitutes work, to protect the circuit of heat management system, avoid fault loop to vehicle performance (mainly heat dissipation and
Heating properties) influence, extend the service life of vehicle.
It is further used as preferred embodiment, it is described when controller detects that electric motor loop breaks down or cell circuit
When breaking down, according to the first temperature, second temperature and third temperature by controller control four-way valve be connected to electric motor loop and
The step for cell circuit S204, specifically include:
When controller detects that the first liquid pump breaks down, the first liquid pumping source is disconnected by controller and is stopped
Work order is issued to the first liquid pump；
When controller determine the first temperature be less than first threshold when, by controller control four-way valve disconnect electric motor loop and
The connection of cell circuit；
When controller determine the first temperature be greater than second threshold when, by controller control four-way valve be connected to electric motor loop and
Cell circuit, while second liquid pump is driven by controller and promotes the revolving speed of second liquid pump, and is driven by controller
Radiator radiates；
When controller determines that third temperature is greater than third threshold value, air-conditioning cooling circuit is started to BMS's by controller
Battery core cooling；
When controller determine third temperature be greater than four threshold values when, by controller control four-way valve disconnect electric motor loop and
The connection of cell circuit.
Specifically, controller can the progress such as state, the first temperature, second temperature and third temperature to the first liquid pump it is real
When detection and monitoring can control four-way valve when detecting that the first liquid pump breaks down and connect electric motor loop and cell circuit
It is logical, to be worked on the second liquid of cell circuit pump etc. to substitute the first liquid pump, the first liquid failure of pump is reduced to electricity
The influence of machine loop heat pipe reason.When detecting that the first liquid pump breaks down, power traveling will drop in vehicle, while can be by first
Liquid pump fault message is sent to instrument and shows, prompt driver: the first liquid failure of pump please contacts maintenance as early as possible.
When the first temperature is less than first threshold, shows that electric motor loop does not need to radiate, be not processed, i.e., need to disconnect at this time
Electric motor loop is connected to cell circuit, so that electric motor loop and cell circuit continue independent operating.
The revolving speed for promoting second liquid pump, is to meet the needs of electric motor loop is to flow.
When third temperature be greater than third threshold value when, show that the battery core temperature of BMS is higher, need to start compressor of air conditioner to
The battery core of BMS cools down, to reduce the influence to the battery core of BMS.
When third temperature is greater than four threshold values, showing that the battery core temperature of BMS is excessively high, BMS can be damaged by working on, so
When need to disconnect being connected to for electric motor loop and cell circuit by four-way valve, to protect BMS.
First threshold, second threshold, third threshold value and the 4th threshold value are preset value, can be according to the reality of electric car
Situation is preset, and the 4th threshold value of first threshold < second threshold < third threshold value <.
It is further used as preferred embodiment, it is described when controller detects that electric motor loop breaks down or cell circuit
When breaking down, according to the first temperature, second temperature and third temperature by controller control four-way valve be connected to electric motor loop and
The step for cell circuit S204, specifically include:
When controller detects that second liquid pump breaks down, second liquid pumping source is disconnected by controller and is stopped
It is pumped to second liquid and issues work order；
When controller determine the first temperature less than five threshold values when, by controller control four-way valve be connected to electric motor loop and
Cell circuit, while the first liquid pump is driven by controller and promotes the revolving speed of the first liquid pump, and is driven by controller
Radiator radiates；
When controller determines that the first temperature is greater than six threshold values, first passes through controller starting air-conditioning cooling circuit and drive
First liquid pump work gives electric motor loop cooling, then determines the difference of the first temperature and third temperature less than the in controller
When seven threshold values, four-way valve is controlled by controller and is connected to electric motor loop and cell circuit, while the first liquid is promoted by controller
The revolving speed and driving radiator of body pump radiate.
Specifically, the progress such as state, the first temperature, second temperature and the third temperature that controller can pump second liquid are real
When detection and monitoring, when detecting that second liquid pump breaks down and when the battery core of BMS needs to radiate, can control four-way valve will be electric
Machine circuit is connected to cell circuit, is worked on, is reduced with substituting second liquid pump with first liquid pump of electric motor loop etc.
Influence of the second liquid failure of pump to cell circuit heat management.When detect second liquid pump break down and the battery core of BMS need
When radiating, power traveling will drop in vehicle, while second liquid failure of pump information can be sent to instrument and shown, prompt to drive
Member: second liquid failure of pump please contacts maintenance as early as possible.
The revolving speed for promoting the first liquid pump is to meet the needs of cell circuit is to flow.
When the first temperature is greater than six threshold values, shows that the coolant temperature of electric motor loop is higher, therefore need first to start sky
Compressor is adjusted to cool down to electric motor loop, to prevent the device of electric motor loop from damaging because of temperature height.And first is determined in controller
When the difference of temperature and third temperature is less than seven threshold values, four-way valve is controlled by controller and is connected to electric motor loop and battery time
Road is that the temperature difference of the battery core temperature of the coolant temperature and BMS in order to guarantee electric motor loop is not too big, prevents the electricity to BMS
Core causes cooling thermal impact, protects the battery core of BMS.
5th threshold value, the 6th threshold value and the 7th threshold value can be preset according to the actual conditions of electric car, and the
The 6th threshold value of five the 7th threshold value < of threshold value <.
It is further used as preferred embodiment, it is described when controller detects that electric motor loop breaks down or cell circuit
When breaking down, according to the first temperature, second temperature and third temperature by controller control four-way valve be connected to electric motor loop and
The step for cell circuit S204, specifically include:
When controller detects that second liquid pump breaks down, second liquid pumping source is disconnected by controller and is stopped
It is pumped to second liquid and issues work order；
When the temperature difference of controller the first temperature of judgement and second temperature is less than eight threshold values, four-way is controlled by controller
Valve is connected to electric motor loop and cell circuit, while driving the first liquid pump by controller and promoting the revolving speed of the first liquid pump；
When the temperature difference of controller the first temperature of judgement and second temperature is greater than nine threshold values, it is empty to first pass through controller starting
It adjusts cooling circuit and drives the first liquid pump work, cool down to electric motor loop, then determine the first temperature and second in controller
The temperature difference of temperature controls four-way valve by controller and is connected to electric motor loop and cell circuit less than the tenth threshold value, while passing through control
Device processed promotes the revolving speed of the first liquid pump；
When detecting third temperature after preset time less than 11 threshold value, by controller heater into
Row heating.
Specifically, the progress such as state, the first temperature, second temperature and the third temperature that controller can pump second liquid are real
When detection and monitoring, when detecting that second liquid pump breaks down and when the battery core of BMS needs to heat, can control four-way valve will be electric
Machine circuit is connected to cell circuit, is worked on, is reduced with substituting second liquid pump with first liquid pump of electric motor loop etc.
Influence of the second liquid failure of pump to cell circuit heat management.When detect second liquid pump break down and the battery core of BMS need
When heating, power traveling will drop in vehicle, while second liquid failure of pump information can be sent to instrument and shown, prompt to drive
Member: second liquid failure of pump please contacts maintenance as early as possible.
When electric motor loop is connected to cell circuit, since battery core needs to heat, so the first temperature is high under original state
In second temperature, and second temperature is in third temperature in cell circuit (i.e. the temperature of battery core) in cell circuit
Positive correlation (second temperature is higher, and third temperature is also higher).Therefore when the temperature difference of the first temperature and second temperature is less than the 8th
When threshold value, it is showing electric motor loop coolant liquid with the temperature of the battery core temperature difference in allowed limits, battery core will not be caused cold
Thermal shock is connected to electric motor loop and cell circuit by four-way valve at this time, while driving the first liquid pump by controller and mentioning
The revolving speed for rising the first liquid pump is first heated to BMS using the waste heat of motor.The revolving speed for promoting the first liquid pump is to meet
Demand of the cell circuit to flow.
And when the temperature difference of the first temperature and second temperature is greater than nine threshold values, show electric motor loop coolant liquid and battery core
Temperature the temperature difference it is big, cooling thermal impact may be caused to battery core, controller starting is first passed through at this time and air-conditioning cooling circuit and drives
Dynamic first liquid pump work, cools down to electric motor loop, then determines that the temperature difference of the first temperature and second temperature is less than in controller
When ten threshold values, four-way valve is controlled by controller and is connected to electric motor loop and cell circuit, while promoting first by controller
The revolving speed of liquid pump.
When detecting third temperature after preset time less than 11 threshold value, showing only can not by electric motor loop
Meet the heating requirements of battery core, needs to be heated by controller heater at this time.
8th threshold value, the 9th threshold value, the tenth threshold value and the 11st threshold value can carry out pre- according to the actual conditions of electric car
It first sets, and the 9th threshold value of the 8th the tenth threshold value < of threshold value <.
As depicted in figs. 1 and 2, using coolant liquid as water, controller is entire car controller VCU, the first liquid pump and the second liquid
Body pump is water pump (the first liquid pump is also motor and water pump at this time, and second liquid pump is also battery water pump), and radiator is electronics
For fan, in heat management system control loop, entire car controller VCU senses motor and water pump, battery water pump, the first temperature
The devices such as device, the second temperature sensor, electronic fan carry out real time monitoring diagnosis.When diagnosing water outlet pump can not work, such as water pump
Stall etc., this specific embodiment will execute the control of following manner based on control method of the invention:
(1) motor and water pump failure and control strategy when can not work
Specifically, motor and water pump failure and specific control process is as follows when can not work:
1) when VCU diagnosing motor water pump breaks down and can not work, motor and water pump power supply is disconnected, stops issuing motor water
Pump work instruction, meanwhile, power traveling will drop in vehicle, and motor and water pump fault message is sent to instrument and is shown, prompt to drive
Member: motor and water pump failure please contacts maintenance as early as possible；
2) VCU judges the temperature of the first temperature sensor of current motor circuit, and executes operations described below:
If the temperature of the first temperature sensor is less than a certain threshold value T1, does not need to radiate, be not processed；If the first temperature
The temperature of sensor is greater than a certain threshold value T2, and VCU sends instruction control four-way valve and switches over, motor and cell circuit are led
It is logical；
After 2 circuit conductings, VCU drives battery water pump, carries out Loop Water circulation driving using battery water pump, and mention simultaneously
The revolving speed of battery water pump is risen to meet the flow demand in circuit, and electronic fan is driven to radiate；Also to judge BMS's simultaneously
Battery core maximum temperature then starts compressor of air conditioner and cools down to cell circuit, promoted back if battery core temperature is higher than a certain threshold value T3
Road heat-sinking capability reduces water temperature；
If the battery core temperature of battery is more than early warning value T4, stop the control of four-way valve, disconnect the connection in 2 circuits, protects
Protect BMS.
(2) battery water pump can not job failure when control strategy
Specifically, battery fault of water pump and control process when can not work include:
(1) control process when battery core needs to radiate
Specifically, the specific control process when battery core needs to radiate is as follows:
1) VCU diagnoses cell water pump and breaks down and can not work, and disconnects pump power, and stopping issues pump working and refers to
It enables, meanwhile, power traveling will drop in vehicle, and battery fault of water pump information is sent to instrument and is shown, prompt driver: cell water
Failure of pump please contacts maintenance as early as possible；
2) VCU judges the temperature of first temperature sensor in current motor circuit, and executes operations described below；
If the temperature of the first temperature sensor is less than a certain threshold value T5, VCU control four-way valve is switched over, by electric motor loop
It is connected with cell circuit, driving motor water pump, promotes the revolving speed of motor and water pump to meet the flow demand in circuit, while driving electricity
Sub- fan work；
If the temperature of the first temperature sensor is greater than a certain threshold value T6, VCU first requests to open compressor of air conditioner, and drives electricity
Machine pump working cools down to electric motor loop coolant liquid, protects the device of electric motor loop.Temperature and the to the first temperature sensor
The a certain temperature T7 of the temperature difference < of the temperature of three-temperature sensor (in order to guarantee the first temperature sensor temperature and the battery core temperature difference not
Can be excessive, prevent cooling thermal impact) after, VCU control four-way valve switches over, and electric motor loop is connected with cell circuit, is mentioned simultaneously
The revolving speed of lift pump opens electronic fan.
(2) control process when battery core needs to heat
Specifically, the specific control process when battery core needs to heat is as follows:
1) VCU diagnoses cell water pump and breaks down and can not work, and disconnects pump power, and stopping issues pump working and refers to
It enables, meanwhile, power traveling will drop in vehicle, and battery fault of water pump information is sent to instrument and is shown, prompt driver: cell water
Failure of pump please contacts maintenance as early as possible；
2) VCU judges the temperature of the second temperature sensor of the first temperature sensor of current motor circuit and cell circuit, and holds
Row operations described below:
If the temperature difference < of the first temperature sensor and the second temperature sensor a certain threshold value T8, VCU control four-way valve is cut
It changes, motor is connected with cell circuit, driving motor circuit water pump, and the revolving speed of water pump is promoted simultaneously；
If the temperature difference > of the first temperature sensor and the second temperature sensor a certain threshold value T9, VCU first request unlatching air-conditioning pressure
Contracting machine, and driving motor pump working cool down to electric motor loop coolant liquid.To the first temperature sensor and the second temperature sensor
After a certain temperature T10 of temperature difference < (guaranteeing that the temperature of the first temperature sensor and the battery core temperature difference are not too big, prevent cooling thermal impact),
VCU control four-way valve switches over, and electric motor loop is connected with cell circuit, driving motor water pump, and promote motor water simultaneously
The revolving speed of pump；
3) by detecting the minimum temperature of battery core after a certain period of time, if battery core temperature is still below a certain threshold value T11, VCU is asked
Heater is asked to heat, driving battery water pump works according to maximum (top) speed.
Referring to Fig. 4, the embodiment of the invention provides a kind of control methods of thermal management system of electric automobile, including following step
It is rapid:
S301, the coolant temperature of electric motor loop is obtained as the first temperature；
S302, the coolant temperature of cell circuit is obtained as second temperature；
S303, the temperature of the battery core of BMS in cell circuit is obtained as third temperature；
S304, when detecting that electric motor loop breaks down or cell circuit breaks down, according to the first temperature, second temperature
Degree is connected to electric motor loop and cell circuit with third temperature control four-way valve.
Specifically, the coolant temperature of electric motor loop is obtained as the first temperature by the first temperature sensor, by the
Two temperature sensors obtain the coolant temperature of cell circuit as second temperature, obtain battery by third temperature sensor and return
Whether the temperature of the battery core of BMS is as third temperature in road, detect electric motor loop by controller and break down or cell circuit
Whether break down.
Specifically, electric motor loop breaks down including failures such as the first liquid failure of pump, radiator failures, wherein to motor
What circuit heat dissipation was affected is the first liquid failure of pump.
Cell circuit breaks down including failures such as second liquid failure of pump, heater failures, wherein dissipating to cell circuit
Biggish heat affecting is second liquid failure of pump.
Four-way valve is connected to electric motor loop and cell circuit, it is therefore an objective to regard electric motor loop and cell circuit as one by series connection
A circuit controls simultaneously, when the device in a circuit sends failure in this way, can be substituted with the device in another circuit
Work.
As shown in the above, the present embodiment controls four-way valve connection electricity when electric motor loop or cell circuit break down
Machine circuit and cell circuit are connected to another time by four-way valve when electric motor loop is with a loop fault in cell circuit
Road substitutes work, to protect the circuit of heat management system, avoid fault loop to vehicle performance (mainly heat dissipation and
Heating properties) influence, extend the service life of vehicle.
Referring to Fig. 5, the embodiment of the invention provides a kind of control devices of thermal management system of electric automobile, comprising:
At least one processor, for storing program；
At least one processor realizes a kind of electric car heat management system of the present invention for executing described program
The control method of system.
Content in above-mentioned Fig. 4 or control method embodiment shown in fig. 5 is suitable for this control device embodiment, this control
The function that Installation practice processed is implemented is identical as above-mentioned control method embodiment, and the beneficial effect reached with it is above-mentioned
Control method embodiment beneficial effect achieved is also identical.
It is to be illustrated to preferable implementation of the invention, but the present invention is not limited to the embodiment above, it is ripe
Various equivalent deformation or replacement can also be made on the premise of without prejudice to spirit of the invention by knowing those skilled in the art, this
Equivalent deformation or replacement are all included in the scope defined by the claims of the present application a bit.
Claims (10)
1. a kind of thermal management system of electric automobile, it is characterised in that: including electric motor loop, cell circuit, air-conditioning cooling circuit, four
Port valve and controller, the electric motor loop include the first liquid feed device, the first liquid pump, electric machine controller, motor, charger,
First temperature sensor, radiator and first heat exchanger, the cell circuit include the second liquid feed device, BMS, second temperature
Sensor, heater, second liquid pump and second heat exchanger, the output end of first liquid feed device pass through four-way valve
It is connect with the input terminal of the first liquid pump, the output end of first liquid pump passes sequentially through electric machine controller, motor, charging
Machine, the first temperature sensor, radiator and first heat exchanger are connect with the input terminal of the first liquid feed device in turn, the BMS
Output end connect by four-way valve with the input terminal of second temperature sensor, the output end of the second temperature sensor
It passes sequentially through heater, second liquid pump, second heat exchanger and the second liquid feed device and then is connect with the input terminal of BMS, institute
It states first heat exchanger and second heat exchanger and is also all connected with air-conditioning cooling circuit, the controller is separately connected four-way valve,
One liquid pump, electric machine controller, charger, the first temperature sensor, radiator, BMS, second temperature sensor, heater and
Second liquid pump.
2. a kind of thermal management system of electric automobile according to claim 1, it is characterised in that: the air-conditioning cooling circuit packet
Current divider, the first shut-off valve, compressor of air conditioner and the second shut-off valve are included, the input terminal connection compressor of air conditioner of the current divider
Output end, the first output end of the current divider pass sequentially through the first shut-off valve and First Heat Exchanger so that with compressor of air conditioner
First input end connection, the second output terminal of the current divider pass sequentially through the second shut-off valve and the second heat exchanger and then and air-conditioning
Second input terminal of compressor connects, and the controller is separately connected the first shut-off valve, compressor of air conditioner and the second shut-off valve.
3. a kind of thermal management system of electric automobile according to claim 2, it is characterised in that: further include main relay,
One relay, the second relay and third relay, the input terminal of the main relay and the output end of controller connect, described
The output end of main relay is separately connected compressor of air conditioner, heater, electric machine controller, BMS, charger, the first relay,
Two relays and third relay, the output end of first relay connect the input terminal of the first liquid pump, described second after
The input terminal of the output end connection second liquid pump of electric appliance, the input terminal of the output end connection radiator of the third relay.
4. a kind of thermal management system of electric automobile according to claim 1,2 or 3, it is characterised in that: further include third temperature
Sensor is spent, the third temperature sensor is connect with the battery core of BMS and controller respectively.
5. a kind of control method of thermal management system of electric automobile, it is characterised in that: the following steps are included:
The coolant temperature of electric motor loop is obtained as the first temperature by the first temperature sensor；
The coolant temperature of cell circuit is obtained as second temperature by second temperature sensor；
The temperature of the battery core of BMS in cell circuit is obtained as third temperature by third temperature sensor；
When controller detects that electric motor loop breaks down or cell circuit breaks down, according to the first temperature, second temperature
Four-way valve is controlled by controller with third temperature and is connected to electric motor loop and cell circuit.
6. a kind of control method of thermal management system of electric automobile according to claim 5, it is characterised in that: described when control
When device processed detects that electric motor loop breaks down or cell circuit breaks down, according to the first temperature, second temperature and third temperature
Degree controls the step for four-way valve is connected to electric motor loop and cell circuit by controller, specifically includes:
When controller detects that the first liquid pump breaks down, passes through controller and disconnect the first liquid pumping source and stop to the
One liquid pump issues work order；
When controller determines that the first temperature is less than first threshold, four-way valve is controlled by controller and disconnects electric motor loop and battery
The connection in circuit；
When controller determines that the first temperature is greater than second threshold, four-way valve is controlled by controller and is connected to electric motor loop and battery
Circuit, while second liquid pump is driven by controller and promotes the revolving speed of second liquid pump, and is driven and is radiated by controller
Device radiates；
When controller determines that third temperature is greater than third threshold value, air-conditioning cooling circuit is started to the battery core of BMS by controller
Cooling；
When controller determines that third temperature is greater than four threshold values, four-way valve is controlled by controller and disconnects electric motor loop and battery
The connection in circuit.
7. a kind of control method of thermal management system of electric automobile according to claim 5, it is characterised in that: described when control
When device processed detects that electric motor loop breaks down or cell circuit breaks down, according to the first temperature, second temperature and third temperature
Degree controls the step for four-way valve is connected to electric motor loop and cell circuit by controller, specifically includes:
When controller detects that second liquid pump breaks down, passes through controller and disconnect second liquid pumping source and stop to the
Two liquid pumps issue work order；
When controller determines the first temperature less than five threshold values, four-way valve is controlled by controller and is connected to electric motor loop and battery
Circuit, while the first liquid pump is driven by controller and promotes the revolving speed of the first liquid pump, and is driven and is radiated by controller
Device radiates；
When controller determines that the first temperature is greater than six threshold values, first passes through controller starting air-conditioning cooling circuit and drive first
Liquid pump work cools down to electric motor loop, then in the difference of controller the first temperature of judgement and third temperature less than the 7th threshold
When value, four-way valve is controlled by controller and is connected to electric motor loop and cell circuit, while the first liquid pump is promoted by controller
Revolving speed and driving radiator radiate.
8. a kind of control method of thermal management system of electric automobile according to claim 5, it is characterised in that: described when control
When device processed detects that electric motor loop breaks down or cell circuit breaks down, according to the first temperature, second temperature and third temperature
Degree controls the step for four-way valve is connected to electric motor loop and cell circuit by controller, specifically includes:
When controller detects that second liquid pump breaks down, passes through controller and disconnect second liquid pumping source and stop to the
Two liquid pumps issue work order；
When the temperature difference of controller the first temperature of judgement and second temperature is less than eight threshold values, passes through controller and control four-way valve company
Three-way motor circuit and cell circuit, while the first liquid pump is driven by controller and promotes the revolving speed of the first liquid pump；
When the temperature difference of controller the first temperature of judgement and second temperature is greater than nine threshold values, controller starting air-conditioning cold is first passed through
But circuit and the first liquid pump work of driving, give electric motor loop to cool down, and then determine the first temperature and second temperature in controller
The temperature difference four-way valve is controlled by controller and is connected to electric motor loop and cell circuit less than the tenth threshold value, while passing through controller
Promote the revolving speed of the first liquid pump；
When detecting third temperature after preset time less than 11 threshold value, added by controller heater
Heat.
9. a kind of control method of thermal management system of electric automobile, it is characterised in that: the following steps are included:
The coolant temperature of electric motor loop is obtained as the first temperature；
The coolant temperature of cell circuit is obtained as second temperature；
The temperature of the battery core of BMS in cell circuit is obtained as third temperature；
When detecting that electric motor loop breaks down or cell circuit breaks down, according to the first temperature, second temperature and third
Temperature controls four-way valve connection electric motor loop and cell circuit.
10. a kind of control device of thermal management system of electric automobile, it is characterised in that: include:
At least one processor, for storing program；
At least one processor, for executing described program to realize such as a kind of described in any item electronic vapour of claim 5-9
The control method of vehicle heat management system.
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