CN108790673B - Hybrid electric vehicle air conditioning system and control method thereof - Google Patents
Hybrid electric vehicle air conditioning system and control method thereof Download PDFInfo
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- CN108790673B CN108790673B CN201810387713.6A CN201810387713A CN108790673B CN 108790673 B CN108790673 B CN 108790673B CN 201810387713 A CN201810387713 A CN 201810387713A CN 108790673 B CN108790673 B CN 108790673B
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- 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
- B60H1/004—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for vehicles having a combustion engine and electric drive means, e.g. hybrid electric vehicles
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- 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
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- 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
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- 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
- B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
- B60H1/03—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant and from a source other than the propulsion plant
- B60H1/034—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant and from a source other than the propulsion plant from the cooling liquid of the propulsion plant and from an electric heating device
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- 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
- B60H2001/003—Component temperature regulation using an air flow
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- 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
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- Sustainable Energy (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The invention relates to the field of hybrid electric vehicle air conditioners and discloses a hybrid electric vehicle air conditioning system which comprises a range extender cooling loop, a heating loop and a controller, wherein the heating loop is communicated with the range extender cooling loop through a first electromagnetic valve; the heating loop further comprises an electric heater, and the electric heater is used for heating the cooling liquid of the heating loop; the system also comprises a temperature sensor, and the controller is used for controlling the opening and closing of the first electromagnetic valve and the opening and closing of the electric heater according to the temperature detected by the temperature sensor; the invention also discloses another air conditioning system of the hybrid electric vehicle and a control method. The air conditioner controller and the VCU have clear responsibilities, and the heat management system CAN effectively operate through the CAN control function, so that the compartment and the high-voltage battery are in a reasonable temperature environment.
Description
Technical Field
The invention relates to the technical field of hybrid electric vehicle air conditioners, in particular to a hybrid electric vehicle air conditioner system and a control method thereof.
Background
According to the development planning of the energy-saving and new energy automobile industry, the development situation that the emission state policy drive influences the new energy logistics vehicles is reduced, the local policy influences the production, marketing, popularization and application of the new energy logistics vehicles loosely, and light logistics and home configuration become the largest market of the new energy logistics vehicles.
The high-voltage battery is a main part on a new energy automobile, and is used in a temperature environment of 20-35 ℃, so that the service life and the capacity are the maximum. How to activate a high-voltage battery to have greater activity and enable the battery to provide greater electric quantity for vehicles in unit volume is a problem to be solved at present. In order to ensure the working environment of the temperature, the air conditioner is required to provide support for the temperature.
In the prior art, the battery is cooled by air cooling, but the temperature control is not ideal; and some control modes of cooling the battery by water cooling are controlled by a vehicle control unit, so that the development period and the cost are high, and the control method is not suitable for popularization on light trucks.
The invention provides a hybrid electric vehicle air conditioner control method, which enables an air conditioner Controller to effectively operate a heat management system through CAN (Controller area network) communication, inputs cold water and hot water into a carriage and a high-voltage battery compartment by controlling components such as an electromagnetic three-way valve, an electronic water pump, a stop valve and the like to operate, controls the temperature environment of the carriage and the high-voltage battery compartment within a reasonable range, provides a comfortable environment for driving, provides an environment compartment with a proper temperature for the high-voltage battery, and activates the maximum capacity of the high-voltage battery.
Disclosure of Invention
The invention aims to solve the technical problem of providing a hybrid electric vehicle air conditioning system and a control method thereof, which CAN enable an air conditioning controller to effectively operate a thermal management system through CAN communication, so that a carriage and a high-voltage battery CAN be in a reasonable temperature environment.
The specific technical scheme of the invention is as follows:
a hybrid electric vehicle air conditioning system comprises a range extender cooling circuit, a heating circuit and a controller, wherein the heating circuit is communicated with the range extender cooling circuit through a first electromagnetic valve, and the first electromagnetic valve is used for controlling cooling liquid to flow from the range extender cooling circuit to the heating circuit;
the heating circuit comprises an electric heater for heating the cooling liquid of the heating circuit;
the system further includes a temperature sensor for detecting a coolant temperature of the range extender cooling circuit;
the controller is used for controlling the opening and closing of the first electromagnetic valve and the opening and closing of the electric heater according to the temperature detected by the temperature sensor.
Preferably, the heating circuit is a compartment heating circuit, and the compartment heating circuit further comprises a first electronic water pump, a warm air core, a first valve body and a second valve body;
when the range extender participates in temperature rise, the first electromagnetic valve is opened, and cooling liquid of a cooling loop of the range extender sequentially passes through the first electronic water pump, the electric heater, the warm air core body, the second valve body and the first valve body and circulates in a compartment heating loop;
when the range extender does not participate in temperature rise, the first electromagnetic valve is closed, the first electronic water pump pumps the cooling liquid in the compartment heating loop into the electric heater, and the heated cooling liquid circulates in the compartment heating loop.
Preferably, the heating loop is a battery compartment heating loop, and the battery compartment heating loop further comprises a first electronic water pump, a third electronic water pump, a battery pack, an intercooler, a water chilling unit, a second valve body and a first valve body;
when the range extender participates in temperature rise, the first electromagnetic valve is opened, and cooling liquid of a cooling loop of the range extender sequentially passes through the first electronic water pump, the electric heater, the third electronic water pump, the battery pack, the intercooler, the water chilling unit, the second valve body and the first valve body and circulates in a heating loop of the battery compartment;
when the range extender does not participate in temperature rise, the first electromagnetic valve is closed, the first electronic water pump pumps the cooling liquid in the battery compartment heating loop into the electric heater, and the heated cooling liquid circulates in the battery compartment heating loop.
Furthermore, the system also comprises a battery compartment refrigeration loop, wherein the battery compartment refrigeration loop comprises a third electronic water pump, a battery pack, an intercooler and a water chilling unit, and refrigerant can flow into the water chilling unit through a second electromagnetic valve and exchange heat with cooling liquid of the battery compartment refrigeration loop.
The invention also provides another hybrid electric vehicle air conditioning system which comprises a range extender cooling circuit, a carriage heating circuit, a battery compartment heating circuit and a controller, wherein the carriage heating circuit is communicated with the range extender cooling circuit through a first electromagnetic valve, and the first electromagnetic valve is used for controlling cooling liquid to flow from the range extender cooling circuit to the carriage heating circuit;
the compartment heating loop comprises an electric heater, and the electric heater is used for heating the cooling liquid of the compartment heating loop;
the battery compartment heating loop comprises a heat exchanger, and the carriage heating loop and the battery compartment heating loop exchange heat through the heat exchanger;
the system further includes a temperature sensor for detecting a coolant temperature of the range extender cooling circuit;
the controller is used for controlling the opening and closing of the first electromagnetic valve and the opening and closing of the electric heater according to the temperature detected by the temperature sensor.
Furthermore, the compartment heating loop also comprises a first electronic water pump, a warm air core body, a first valve body and a second valve body;
when the range extender participates in temperature rise, the first electromagnetic valve is opened, and cooling liquid of a cooling loop of the range extender sequentially passes through the first electronic water pump, the electric heater, the warm air core body, the second valve body and the first valve body and circulates in a compartment heating loop;
when the range extender does not participate in temperature rise, the first electromagnetic valve is closed, the first electronic water pump pumps the cooling liquid in the compartment heating loop into the electric heater, and the heated cooling liquid circulates in the compartment heating loop.
Preferably, the battery compartment heating circuit further comprises a third electronic water pump, a battery pack, an intercooler and a water chilling unit;
when the range extender participates in temperature rise, the first electromagnetic valve is opened, and the cooling liquid of the cooling loop of the range extender sequentially passes through the first electronic water pump, the electric heater, the warm air core body, the second valve body, the heat exchanger and the first valve body and exchanges heat with the cooling liquid in the heating loop of the battery compartment through the heat exchanger;
when the range extender does not participate in temperature rise, the first electromagnetic valve is closed, the first electronic water pump pumps the cooling liquid in the compartment heating loop into the electric heater, and the heated cooling liquid passes through the heat exchanger and exchanges heat with the cooling liquid in the battery compartment heating loop.
Furthermore, the system also comprises a battery compartment refrigeration loop, wherein the battery compartment refrigeration loop comprises a third electronic water pump, a battery pack, an intercooler, a water chilling unit and a heat exchanger, and refrigerant can flow into the water chilling unit through a second electromagnetic valve and exchange heat with cooling liquid of the battery compartment refrigeration loop.
The invention also provides a Control method of the air conditioning system of the hybrid electric Vehicle, the air conditioning system of the hybrid electric Vehicle comprises a range extender, an electric heater, a compressor, a VCU (Vehicle Control Unit), an air conditioning controller, an electronic water pump and a valve body, and the method comprises the following steps:
receiving a heating/cooling request and sending the heating/cooling request to the VCU through a CAN bus;
processing a request received through a CAN bus, if the request is a heating request, judging whether the temperature of the cooling liquid of the range extender reaches a temperature threshold value, and if the temperature reaches the temperature threshold value, providing a heat source by the range extender; if the temperature threshold is not reached, calculating the output power of the electric heater and controlling the electric heater to work at the output power, wherein a heat source is provided by the electric heater; if the request is a refrigeration request, calculating the rotating speed of the compressor and controlling the compressor to work;
and sending an instruction to an air conditioner controller through a CAN bus so as to control the electronic water pump and the valve body to work.
Further, the cooling/heating request comprises a compartment cooling/heating request and a battery compartment cooling/heating request;
after receiving the battery compartment heating/cooling request, the method comprises the following steps:
when the battery compartment needs to be heated, the battery controller sends the cell temperature and the water inlet temperature to the VCU;
when the battery compartment needs to be cooled, the battery controller sends a signal that the temperature of the battery core is too high to the VCU.
Preferably, the calculating the electric heater output power comprises:
when a compartment has a heating demand, the VCU calculates a corresponding power value of the electric heater by judging a request signal sent by the compartment and temperature setting, and controls the electric heater to operate at the corresponding power value;
when the battery compartment has a heating requirement, the output power of the electric heater is a first preset power value.
Further, the calculating the compressor rotation speed includes:
the VCU correlates the evaporation temperature signal and the pressure switch signal according to the requirements of the compartment and the battery compartment, and sends a control instruction to the air conditioner controller after operation processing;
the air conditioner controller collects the resistance value of the evaporation temperature sensor, converts the resistance value into a corresponding temperature value and sends the temperature value to the VCU through the CAN bus;
and the VCU determines the rotating speed of the compressor by associating the relationship between the temperature value corresponding to the evaporation temperature sensor and the rotating speed of the compressor and combining a gear of a mixing air door.
Preferably, when the vehicle cabin has a warming requirement or the battery cabin has a warming requirement, the method comprises the following steps:
when the temperature of the coolant of the range extender reaches a first temperature threshold value, the electric heater does not work, a heat source is provided by the range extender, and the VCU controls the air conditioner controller to work;
when the temperature of the range extender cooling liquid does not reach the first temperature threshold value, the electric heater works, a heat source is provided by the electric heater, and the VCU controls the power output of the electric heater and the air conditioner controller to work;
when the car and the battery compartment both have the heating requirement, the method comprises the following steps:
when the temperature of the coolant of the range extender reaches a second temperature threshold value, the electric heater does not work, a heat source is provided by the range extender, and the VCU controls the air conditioner controller to work;
when the temperature of the range extender cooling liquid does not reach a second temperature threshold value, the electric heater works, and the VCU controls the power output of the electric heater and the air conditioner controller to work.
Further, when the vehicle cabin has a cooling requirement and/or the battery compartment has a cooling requirement, the method comprises the following steps:
the VCU calculates the rotating speed of the compressor and controls the compressor and the air conditioner controller to work;
when the battery compartment has a cooling requirement, the battery compartment is cooled by cooling liquid in a battery compartment refrigerating circuit, and the cooling liquid of the battery compartment refrigerating circuit exchanges heat with a refrigerant.
The embodiment of the invention has the following beneficial effects:
(1) the air conditioner controller and the vehicle control unit VCU have clear responsibility and standard functions, and the CAN control function meets the heat dissipation requirement and simultaneously reduces the power as much as possible and reduces the energy consumption;
(2) according to the invention, the air conditioner controller effectively operates the heat management system through CAN communication, provides a comfortable environment for driving and riding, provides a proper temperature environment cabin for the high-voltage battery, activates the maximum capacity of the high-voltage battery, and simultaneously provides the heat exchange quantity required by intercooling and cooling;
(3) according to the using environment of the vehicle, the low temperature in winter and the high temperature in summer are considered, and the control strategy is formulated according to the using environment temperature defined by the whole vehicle.
Drawings
FIG. 1 is a block diagram of an air conditioning system of a hybrid vehicle according to an embodiment of the present invention;
FIG. 2 is a block diagram of an alternative air conditioning system for a hybrid vehicle according to an embodiment of the present invention;
FIG. 3 is a flowchart of a control method for an air conditioning system of a hybrid electric vehicle according to an embodiment of the present invention;
FIG. 4 is a control schematic block diagram of a control method for an air conditioning system of a hybrid electric vehicle according to an embodiment of the present invention;
fig. 5 is a schematic diagram illustrating a relationship between a rotation speed of a compressor and an evaporation temperature when the cold/warm gear is at a gear 0 according to an embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a relationship between a rotation speed of a compressor and an evaporation temperature when the cold/warm gear is at the 1 st gear according to the embodiment of the present invention;
fig. 7 is a schematic diagram illustrating a relationship between a rotation speed of a compressor and an evaporation temperature when the cold/warm gear is at a gear 2 according to an embodiment of the present invention;
fig. 8 is a schematic diagram illustrating a relationship between a rotation speed of a compressor and an evaporation temperature when the cold/warm gear is in the 3 th gear according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," and the like, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.
Example 1
The present embodiment provides a hybrid vehicle air conditioning system, please refer to fig. 1, which shows a block diagram of a hybrid vehicle air conditioning system, including a range extender cooling circuit, a heating circuit, and a controller, where the heating circuit is conducted with the range extender cooling circuit through a first electromagnetic valve, and the first electromagnetic valve is used to control a coolant flowing from the range extender cooling circuit to the heating circuit. In this embodiment, the heating circuit may be a car heating circuit, a battery compartment heating circuit, or both, and is not specifically limited herein.
The heating circuit comprises an electric heater 3, and the electric heater 3 is used for heating the cooling liquid of the heating circuit;
the system further includes a temperature sensor for detecting a coolant temperature of the range extender cooling circuit;
the controller is used for controlling the opening and closing of the first electromagnetic valve and the opening and closing of the electric heater 3 according to the temperature detected by the temperature sensor.
The compartment heating circuit further comprises a first electronic water pump 2, a warm air core body 4, a first valve body 6 and a second valve body 5. When the range extender 1 participates in temperature rise, the first electromagnetic valve is opened, and cooling liquid of a cooling loop of the range extender sequentially passes through the first electronic water pump 2, the electric heater 3, the warm air core 4, the second valve body 5 and the first valve body 6 and circulates in a compartment heating loop; when the range extender 1 does not participate in temperature rise, the first electromagnetic valve is closed, the first electronic water pump 2 pumps the coolant in the compartment heating loop into the electric heater 3, and the heated coolant circulates in the compartment heating loop.
The battery compartment heating loop further comprises a first electronic water pump 2, a third electronic water pump 7, a battery pack 8, an intercooler 9, a water chilling unit 10, a second valve body 5 and a first valve body 6. When the range extender 1 participates in temperature rise, the first electromagnetic valve is opened, and cooling liquid of a cooling loop of the range extender sequentially passes through the first electronic water pump 2, the electric heater 3, the third electronic water pump 7, the battery pack 8, the intercooler 9, the water chilling unit 10, the second valve body 5 and the first valve body 6 and circulates in a heating loop of the battery compartment; when the range extender 1 does not participate in temperature rise, the first electromagnetic valve is closed, the first electronic water pump 2 pumps the cooling liquid in the battery compartment heating loop into the electric heater 3, and the heated cooling liquid circulates in the battery compartment heating loop.
The system further comprises a battery compartment refrigeration loop, the battery compartment refrigeration loop comprises a third electronic water pump 7, a battery pack 8, an intercooler 9 and a water chilling unit 10, refrigerant can flow into the water chilling unit 10 through a second electromagnetic valve 11 and exchanges heat with cooling liquid of the battery compartment refrigeration loop, and the refrigerant flows out of the water chilling unit 10 and enters a compressor 14.
Example 2
The embodiment provides another hybrid electric vehicle air conditioning system, please refer to fig. 2, which includes a range extender cooling circuit, a cabin heating circuit, a battery cabin heating circuit and a controller, wherein the cabin heating circuit is conducted with the range extender cooling circuit through a first electromagnetic valve, and the first electromagnetic valve is used for controlling a cooling liquid to flow from the range extender cooling circuit to the cabin heating circuit;
the compartment heating circuit comprises an electric heater 3, and the electric heater 3 is used for heating the cooling liquid of the compartment heating circuit;
the battery compartment heating loop comprises a heat exchanger 16, and the compartment heating loop and the battery compartment heating loop exchange heat through the heat exchanger 16;
the system further includes a temperature sensor for detecting a coolant temperature of the range extender cooling circuit;
the controller is used for controlling the opening and closing of the first electromagnetic valve and the opening and closing of the electric heater according to the temperature detected by the temperature sensor.
The compartment heating circuit further comprises a first electronic water pump 2, a warm air core body 4, a first valve body 6 and a second valve body 5. When the range extender 1 participates in temperature rise, the first electromagnetic valve is opened, and cooling liquid of a cooling loop of the range extender sequentially passes through the first electronic water pump 2, the electric heater 3, the warm air core 4, the second valve body 5 and the first valve body 6 and circulates in a compartment heating loop; when the range extender 1 does not participate in temperature rise, the first electromagnetic valve is closed, the first electronic water pump 2 pumps the coolant in the compartment heating loop into the electric heater 3, and the heated coolant circulates in the compartment heating loop.
The battery compartment heating loop further comprises a third electronic water pump 7, a battery pack 8, an intercooler 9 and a water chilling unit 10. When the range extender 1 participates in temperature rise, the first electromagnetic valve is opened, and the cooling liquid of the range extender cooling loop passes through the first electronic water pump 2, the electric heater 3, the warm air core 4, the second valve body 5, the heat exchanger 16 and the first valve body 6 in sequence, and exchanges heat with the cooling liquid in the battery compartment heating loop through the heat exchanger 3; when the range extender 1 does not participate in temperature rise, the first electromagnetic valve is closed, the first electronic water pump 2 pumps the cooling liquid in the compartment heating loop into the electric heater 3, and the heated cooling liquid passes through the heat exchanger 16 and exchanges heat with the cooling liquid in the battery compartment heating loop.
The system further comprises a battery compartment refrigeration loop, the battery compartment refrigeration loop comprises a third electronic water pump 7, a battery pack 8, an intercooler 9, a water chilling unit 10 and a heat exchanger 16, refrigerant can flow into the water chilling unit 10 through a second electromagnetic valve 11 and exchanges heat with cooling liquid of the battery compartment refrigeration loop, and the refrigerant flows out of the water chilling unit 10 and enters a compressor 14.
Example 3
The embodiment provides a control method of a hybrid vehicle air conditioning system, where the hybrid vehicle air conditioning system includes a range extender, an electric heater, a compressor, a VCU, an air conditioning controller, an electronic water pump, and a valve body, please refer to fig. 3, which shows a flow chart of a control method of a hybrid vehicle air conditioning system, including:
and S301, receiving a heating/cooling request and sending the heating/cooling request to the VCU through the CAN bus.
The air conditioner controller receives the heating/cooling request of the compartment and/or the battery compartment and sends the heating/cooling request to the VCU through the CAN bus. The user generating the request signal by operating the air conditioner control panel in the vehicle compartment includes: an a/C request signal, a heating request signal, a temperature request signal, and a defrost request signal.
After receiving the heating/cooling request of the battery compartment, the method comprises the following steps: when the battery compartment needs to be heated, the battery controller sends the cell temperature and the water inlet temperature to the VCU; when the battery compartment needs to be cooled, the battery controller sends a signal that the temperature of the battery core is too high to the VCU.
S302, the request received through the CAN bus is processed.
And S303, judging whether the received request is a heating request.
S304, if the request is a heating request, judging whether the temperature of the coolant of the range extender reaches a temperature threshold value.
S305, if the temperature threshold is reached, providing a heat source by the range extender.
The temperature threshold herein includes a first temperature threshold corresponding to when the vehicle compartment has a need for temperature rise or the battery compartment has a need for temperature rise, and a second temperature threshold corresponding to when both the vehicle compartment and the battery compartment have a need for temperature rise, and the first temperature threshold is equal to or less than the second temperature threshold. In this embodiment, the first temperature threshold is 55 ℃ and the second temperature threshold is 60 ℃.
S306, if the temperature threshold is not reached, calculating the output power of the electric heater and controlling the electric heater to work at constant power, wherein a heat source is provided by the electric heater.
Wherein the calculating the electric heater output power comprises:
when a heating demand exists in a carriage, the VCU calculates a corresponding power value of the electric heater by judging a request signal sent by a user and temperature setting, and controls the electric heater to operate at the corresponding power value;
when the battery compartment has a heating requirement, the output power of the electric heater is a first preset power value, and in the embodiment, the first preset power value is 6000W.
And if the request is a refrigeration request, calculating the rotating speed of the compressor and controlling the compressor to work.
The calculating the compressor rotation speed includes:
the VCU correlates the evaporation temperature signal and the pressure switch signal according to the requirements of the compartment and the battery compartment, and sends a control instruction to the air conditioner controller after operation processing;
the air conditioner controller collects the resistance value of the evaporation temperature sensor, converts the resistance value into a corresponding temperature value and sends the temperature value to the VCU through the CAN bus;
the VCU determines the rotating speed of the compressor by associating the relationship between the temperature value corresponding to the evaporation temperature sensor and the rotating speed of the compressor and combining the gear of the mixing air door.
And S308, sending an instruction to the air conditioner controller through the CAN bus to control the corresponding electronic water pump and the valve body to work.
And the air conditioner controller controls the corresponding electronic water pump and the valve body to work according to the received VCU instruction.
The air conditioner controller also receives a wind direction mode signal, an air volume signal and an internal and external circulation signal sent by a user, and performs corresponding processing, and the angle of the air door is controlled by the servo motor, the air volume of the fan is controlled by the speed regulating resistor and the like.
Referring to fig. 4, a control schematic block diagram of a control method of an air conditioning system of a hybrid electric vehicle is shown, and with reference to fig. 3 and 4, an operation process of the air conditioning system of the hybrid electric vehicle is as follows:
(1) when the vehicle compartment has a warming requirement and the battery compartment has no warming requirement, the method comprises the following steps:
when the temperature of the coolant of the range extender reaches above 55 ℃, the electric heater 3 does not work, the heat source is provided by the range extender 1, the VCU controls the air conditioner controller to work, the air conditioner controller sends a control instruction to the first electronic water pump 2, the first valve body 6 and the second valve body 5 and controls a warm air channel of the main air conditioner to be opened, the fan runs, and low-temperature air passes through the warm air core body 4 and blows hot air out to heat the carriage; hot water flow direction: the electric heater comprises a first electronic water pump 2, an electric heater 3, a warm air core 4, a second valve body 5, a first valve body 6 and the first electronic water pump 2.
When the temperature of the coolant of the range extender does not reach above 55 ℃, the electric heater 3 works, the VCU controls the power output of the electric heater 3 and the air conditioner controller to work, the air conditioner controller sends a control instruction to the first electronic water pump 2, the first valve body 6 and the second valve body 5 and controls a warm air channel of the air conditioner main unit to be opened, the fan runs, and low-temperature air passes through the warm air core body 4 and blows hot air out to heat the carriage; hot water flow direction: the electric heater comprises a first electronic water pump 2, an electric heater 3, a warm air core 4, a second valve body 5, a first valve body 6 and the first electronic water pump 2.
(2) When the carriage has no heating demand and the battery compartment has a heating demand, the method comprises the following steps:
when the temperature of the coolant of the range extender reaches above 55 ℃, the electric heater 3 does not work, the heat source is provided by the range extender 1, the VCU controls the air-conditioning controller to work, the air-conditioning controller sends control instructions to the first electronic water pump 2, the first valve body 6 and the second valve body 5, and meanwhile, the third electronic water pump 7 runs to heat the battery compartment, and hot water flows: the first electronic water pump 2, the electric heater 3, the warm air core 4, the second valve body 5, the heat exchanger 16, the first valve body 6 and the first electronic water pump 2.
When the temperature of the coolant of the range extender does not reach above 55 ℃, the electric heater 3 works, the battery controller sends the temperature of the battery core and the temperature of the water inlet to the VCU, a heating instruction is generated after the operation of the VCU, the power output of the electric heater and the work of the air conditioner controller are controlled, the air conditioner controller sends a control instruction to the first electronic water pump 2, the first valve body 6 and the second valve body 5, and meanwhile, the third electronic water pump 7 runs to heat the battery compartment, and hot water flows: the first electronic water pump 2, the electric heater 3, the warm air core 4, the second valve body 5, the heat exchanger 16, the first valve body 6 and the first electronic water pump 2.
(3) When the car and the battery compartment both have the heating requirement, the method comprises the following steps:
when the temperature of the coolant of the range extender reaches above 60 ℃, the electric heater 3 does not work, the heat source is provided by the range extender 1, the VCU controls the air conditioner controller to work, the air conditioner controller sends control instructions to the first electronic water pump 2, the third electronic water pump 7, the first valve body 6 and the second valve body 5, and controls a warm air channel of the air conditioner main unit to be opened, the fan runs, low-temperature air passes through the warm air core body 4 and blows out hot air, so that the temperature of the carriage is raised, meanwhile, the third electronic water pump 7 runs, so that the temperature of the battery compartment is raised, and the hot water flows: the first electronic water pump 2, the electric heater 3, the warm air core 4, the second valve body 5, the heat exchanger 16, the first valve body 6 and the first electronic water pump 2.
When the temperature of the coolant of the range extender does not reach more than 60 ℃, the electric heater 3 works, the VCU controls the power output of the electric heater and the work of the air conditioner controller, the air conditioner controller sends control instructions to the first electronic water pump 2, the third electronic water pump 7, the first valve body 6 and the second valve body 5 and controls the opening of a warm air channel of the air conditioner main unit, the fan runs, low-temperature air passes through the warm air core body 4 and blows out hot air, the temperature of the carriage is raised, meanwhile, the third electronic water pump 7 runs, the temperature of the battery compartment is raised, and the hot water flows: the air conditioner comprises a first electronic water pump 2, an electric heater 3, a warm air core 4, a second valve body 5, a heat exchanger 16, a first valve body 6 and the first electronic water pump 2;
(4) when there is the cooling demand in the carriage, the battery compartment does not have the cooling demand, includes:
the VCU identifies whether the pressure of the air conditioning system is normal, if so, the VCU controls the rotating speed of the compressor 14, the rotating speed of the electronic fan and the work of the air conditioner controller, the air conditioner controller sends control instructions to the third electronic water pump 7, the second electromagnetic valve 11 and the third electromagnetic valve 12 and controls the hot air channel of the air conditioner host to be closed, the fan runs, high-temperature air blows out cold air through the evaporation core body 4, the carriage is cooled, and the refrigerant flows to: compressor 14-condenser 15-high-low pressure switch-third electromagnetic valve 12-evaporator 13-compressor 14.
(5) When the carriage does not have the cooling demand, there is the cooling demand in battery compartment, include:
when the battery compartment has a cooling requirement, the battery compartment is cooled by cooling liquid in the battery compartment refrigeration loop, and the cooling liquid of the battery compartment refrigeration loop exchanges heat with the refrigerant.
Specifically, the VCU outputs a rotation speed signal to the compressor 14, the compressor 14 operates as required, the air-conditioning controller sends a control instruction to the second electromagnetic valve 11 and the third electromagnetic valve 12, and controls the third electronic water pump 7 to operate, and the refrigerant flows to: the method comprises the following steps of (1) a compressor 14, a condenser 15, a high-low pressure switch, a second electromagnetic valve 11, a water chilling unit 10 and the compressor 14; the flow direction of the cooling liquid is as follows: the system comprises a water chilling unit 10, a heat exchanger 16, a third electronic water pump 7, a battery pack 8, an intercooler 9 and the water chilling unit 10.
(6) When carriage and battery compartment all have the cooling demand, include:
when the battery compartment has a cooling requirement, the battery compartment is cooled by cooling liquid in the battery compartment refrigeration loop, and the cooling liquid of the battery compartment refrigeration loop exchanges heat with the refrigerant.
Specifically, the VCU outputs a rotation speed signal to the compressor 14, the compressor 14 operates as required, the air-conditioning controller sends a control instruction to the second electromagnetic valve 11 and the third electromagnetic valve 12, and controls the third electronic water pump 7 to operate, and the first refrigerant flows to: the compressor 14-the condenser 15-the high-low pressure switch-the third electromagnetic valve 12-the evaporator 13-the compressor 14; the second refrigerant flow direction: the method comprises the following steps of (1) a compressor 14, a condenser 15, a high-low pressure switch, a second electromagnetic valve 11, a water chilling unit 10 and the compressor 14; the flow direction of the cooling liquid is as follows: the system comprises a water chilling unit 10, a heat exchanger 16, a third electronic water pump 7, a battery pack 8, an intercooler 9 and the water chilling unit 10.
The working process of the hybrid electric vehicle air conditioning system described above is based on the system shown in fig. 2, and for the system shown in fig. 1, the working process is basically similar, except that in fig. 1, the cabin heating loop and the battery compartment heating loop are independent from each other, so that when the battery compartment needs to be heated, the temperature of the battery compartment does not need to be raised depending on the cabin heating loop, and the coolant can be directly pumped into the battery compartment heating loop through the third electronic water pump 7 to heat the battery compartment, and the rest of the operation is not described again.
Example 4
The embodiment provides a hybrid electric vehicle air conditioner panel control system, wherein, the air conditioner control panel includes the A/C button, circulates button, mode knob, amount of wind knob and temperature knob.
The operation of the A/C key is explained as follows:
1. if the wind gear is not 0, the cold and warm knob is set in a cold area (0-3), and the AC indicator light is turned off, the user operates the AC key, the AC request is valid, and the AC indicator light is turned on;
2. if the wind gear is not 0, the cold and warm knob is set in a cold area (0-3), and the AC indicator light is turned on, the user operates the AC key, the AC request is invalid, and the AC indicator light is turned off;
3. if the wind gear is not 0 gear and the cold and warm knob is set in the middle or hot area (4-8 gears), the user operates the AC key, the AC keeps the request invalid, and the AC indicator light is turned off;
4. if the wind gear is 0 gear, the user operates the AC key, the AC keeps the request invalid, and the AC indicator light is turned off;
5. the AC request has a power-off memory function, when the AC request is effective before power-off, after power-on is carried out again, the wind shield is not 0 gear, when the cold and warm knob is set in a cold area (0-3 gear), the AC request is effective, and the AC indicator light is turned on;
6. the air conditioner controller sends HVAC _ AC _ ON _ REQ to the VCU over the CAN bus.
The operational description of the cycle key is as follows:
1. when the circulation indicator light is lightened, the circulation is set as internal circulation;
2. when the circulation indicator light is turned off, the circulation is set as external circulation;
3. when the circulation is in the inner circulation, operating the circulation key, turning off the circulation indicator lamp, and switching the circulation to the outer circulation;
4. when the circulation is the outer circulation, the circulation key is operated, the circulation indicating lamp is lightened, and the circulation is switched to the inner circulation.
The mode knob is described as follows:
rotating this knob, switching the Mode damper, the air conditioner controller sends an AC _ Mode _ Sts status signal to the VCU through the CAN bus:
| serial number | Mode damper position | Feedback voltage |
| 1 | Model blowing surface | 1.1V±0.1V |
| 2 | Model blowing surface&Blow foot | 1.96V±0.1V |
| 3 | Blow foot | 2.23V±0.1V |
| 4 | Blow foot&Defrost 1 | 2.5V±0.1V |
| 5 | Blow foot&Defrost 2 | 2.7V±0.1V |
| 6 | Defrosting | 2.82V±0.1V |
For the defrosting requirement, when the mixing air door is in the heating position and the mode air door is in the defrosting position, the defrosting heating is set to the maximum priority, the output power of the PTC heater is 4000W (only the part of a carriage), and the PTC heater in the embodiment is a ceramic electric heating element and is an automatic constant-temperature and electricity-saving electric heater.
When the blend door is in the cooling position and the mode door is in the defrost position, defrost heating is placed at maximum priority and the compressor output speed is 2500rpm (only the cabin portion).
The operation of the air volume knob is explained as follows:
1. rotating the knob to switch the air volume between 0-4 steps;
2. if the air volume is 0 grade: the compressor and the PTC request signal are closed;
3. the air conditioner controller sends an AC _ Blow _ Sts status signal to the VCU through the CAN bus.
The operation of the cooling and heating knob is explained as follows:
1. the cold and warm knob is divided into 9 gears from full cold to full hot, wherein the left gear 4 is a cold area (0-3), the middle gear is a cold and hot central point (4), and the right gear 4 is a hot area (5-8);
2. the cold and warm knob rotates leftwards to be fully cold and rightwards to be fully hot by taking the cold and warm central point as a base point;
| serial number | Blend door position | Feedback voltage |
| 1 | Coldest state | 4.5V±0.1V |
| 2 | Hottest | 0.5V±0.1V |
Note: other positions of the air door are equally divided according to the voltage value;
3. the air conditioner controller sends an AC _ Mix _ Sts state signal to the VCU through the CAN bus;
4. when the cold-warm knob is set to 4-gear, both AC and PTC requests are invalid;
5. when the cold and warm knob is set to 5-8 gears and the air quantity is not 0 gear, the PTC request is effective;
6. when the cold and warm knob is set to 5-8 gears and the air quantity is 0 gear, the PTC request is invalid;
7. the air conditioner controller sends a PTC _ ON _ REQ signal to the VCU through the CAN bus.
The control procedure for the solenoid valve is as follows:
1. the air conditioner controller receives the electromagnetic valve switch instruction execution of the VCU through the CAN bus;
2. when the Valve _ enable1 sent by the VCU does not enable the signal, the electromagnetic Valve 1 is cut off;
3. when a Valve _ enable1 enable signal sent by the VCU, the electromagnetic Valve 1 is opened;
4. when the Valve _ enable2 sent by the VCU does not enable the signal, the solenoid Valve 2 is cut off;
5. when a Valve _ enable2 enable signal sent by the VCU, the electromagnetic Valve 2 is opened;
6. after the air conditioner controller controls the corresponding electromagnetic Valve to work, the air conditioner controller sends the corresponding Valve _ Sts1 state and Valve _ Sts2 state to the VCU through the CAN bus.
The control procedure for the three-way water valve is as follows:
1. the air conditioner controller receives a three-way water valve switch instruction of the VCU through the CAN bus to execute;
2. the controller receives a Tee-Valve _ enable enabling signal sent by the VCU to execute corresponding control:
| serial number | Signal validity | V1 output | V2 output | V3 output |
| 1 | Invalidation | L | - | H |
| 2 | a is connected with b, a is disconnected with c | L | - | - |
| 3 | a and c are on, and a and b are off | L | H | H |
3. And after the controller executes corresponding control, a Tee-Valve _ Sts state signal is sent to the VCU through the CAN bus.
The control process for the electronic water pump is as follows:
the air conditioner controller receives an electronic water pump switch instruction of a VCU (virtual vehicle Unit) through a CAN (controller area network) bus to execute;
1. the air conditioner controller receives an electronic water pump switch instruction of the VCU through the CAN bus to execute;
2. the air conditioner controller can allow the electronic water Pump to be started only by receiving an enable signal of the electronic water Pump power supply Relay state Pump _ Relay _ Sts sent by the VCU;
3. the air conditioner controller can allow the corresponding water Pump to start to work only by receiving an electronic water Pump _ enable enabling signal;
4. when the water pump is allowed to be started, the air conditioner controller receives an electronic water pump PWM signal:
when the PWM signal is 0-20%, the water pump stops working, and the controller does not output a PWM waveform;
when the PWM signal is 20-80%, the water pump can work adjustably, and the controller outputs a corresponding PWM waveform;
when the PWM signal is 80% -100%, the maximum power of the water pump works, and the controller outputs the PWM duty ratio of 100%;
5. the air conditioner controller sends a corresponding water pump state to the VCU through the CAN bus;
6. the controller receives the power-on and enabling signals sent by the VCU and feeds the power-on and enabling signals back to the VCU through the CAN line;
7. the controller sends the duty ratio of PWM to VCU in real time through the CAN line;
8. the controller feeds back the fault state of the water pump to the VCU through a CAN signal by acquiring the fault state of the water pump;
9. when the water pump has a feedback fault, the controller does not output PWM;
10. when the water pump is in fault, the high level is in fault and the low level is normal through the hard wire feedback controller.
The control process of the compressor is as follows:
1. the VCU correlates corresponding signals of evaporation temperature, a pressure switch and the like according to the requirements of a carriage and a battery compartment, makes corresponding signals and outputs the signals to the air conditioner controller, and simultaneously wakes up the air conditioner controller;
2. the controller converts the resistance value of the evaporation temperature sensor into a corresponding temperature value through an R-T table by collecting the resistance value of the evaporation temperature sensor, and then sends the temperature value to the VCU through the CAN network:
| signal name | Length of | Starting position | Signal validity | Unit of | Offset amount | Transmission module | Remarks for note |
| Evaporation temperature | 8 | 16 | 0～120 | 1℃ | -40 | AC |
3. The starting speed of the compressor is determined by the VCU through the relationship between the temperature value corresponding to the temperature sensor of the associated evaporator and the speed of the compressor and by the combination of the gears of the mixing air door, and the operation can be executed according to the following table:
and calibrating different maintaining rotating speeds according to different target values of the evaporation temperature. The relationship between the compressor rotation speed and the evaporation temperature in the cold and warm gear 0 is shown in fig. 5; the relationship between the rotating speed of the compressor and the evaporation temperature when the cold and warm gear is in the 1-gear is shown in fig. 6; the relationship between the rotating speed of the compressor and the evaporation temperature in the cold and warm gear 2 is shown in fig. 7; the relationship between the rotating speed of the compressor and the evaporation temperature when the cold and warm gear is in the 3-gear is shown in fig. 8;
4. VCU calculates the rotation speed of compressor and sends it to air conditioner controller;
5. when the battery has a cooling requirement, the VCU combines the following table to perform comprehensive operation, and sends the rotating speed value of the compressor to the air conditioner controller through the CAN:
6. the VCU sends the rotating speed of the compressor through the CAN communication signal.
The PTC control process is as follows:
1. the PTC is started by the VCU through judging user request and temperature setting, the operation is carried out at constant power, meanwhile, the outlet temperature is required to be ensured, a corresponding power value is sent to the air conditioner controller, and the power output is shown in the following table:
2. when the battery compartment has a heating requirement, the PTC output power is carried out at 6000W;
3. the VCU transmits the PTC power through CAN communication.
When the high and low voltage switches (which are connected in series) have no ground signal input to the VCU, the VCU must stop the compressor operation.
When the air conditioner compressor works, the fan operates at the duty ratio of 60%, and when the medium-voltage grounding signal exists, the fan operates at the duty ratio of 100%.
If the air volume of the air conditioner blower is 0: the compressor and the PTC request signal are closed; if the ignition switch is placed in an OFF gear: compressor, PTC request signal off.
The range extender participates in the requirements of compartment heating and battery compartment heating:
at a range extender outlet water temperature of < 60 ℃ (this temperature is determined by the range extender): when the VCU calculates that the PTC is 1 and the electronic water pump 1 is 1 according to the relation between the outlet water temperature of the range extender, the ambient temperature and the set temperature, the PTC water heater works and the electronic water pump 1 must work;
at a range extender outlet water temperature of < 60 ℃ (this temperature is determined by the range extender): when the VCU calculates that the PTC is 0 and the electronic water pump 1 is 0 according to the relation between the outlet water temperature of the range extender, the environment temperature and the set temperature, whether the PTC water heater and the electronic water pump 1 work or not is determined by a battery;
when the outlet water temperature of the range extender is more than or equal to 60 ℃ (the temperature is determined by the range extender): according to the relation between the outlet water temperature of the range extender, the ambient temperature and the set temperature, if the compartment needs to be heated, the PTC is calculated to be 0, the electronic water pump 1 works, and whether the PTC water heater works is determined by a battery;
when the outlet water temperature of the range extender is more than or equal to 60 ℃ (the temperature is determined by the range extender): according to the relation between the outlet water temperature of the range extender, the ambient temperature and the set temperature, if the compartment does not need to be heated, the PTC is calculated to be 0, and the electronic water pump 1 is calculated to be 0, whether the electronic water pump 1 and the PTC water heater work is determined by a battery;
note: PTC 1 indicates that PTC has a request;
the electronic water pump 1 indicates an electronic water pump operation as 1.
After the electronic water pump works, the VCU instructs the PTC water heater to work after obtaining the feedback of the working signal of the electronic water pump; after the PTC water heater stops working, the VCU sends an instruction to the air conditioner controller after obtaining a feedback signal, and the air conditioner controller instructs the electronic water pump to stop working. The VCU instructs the compressor to work after receiving the signal feedback of the opening of the stop valve; after the compressor stops working, the VCU sends an instruction to the air conditioner controller after obtaining information feedback, and the air conditioner controller instructs the stop valve to stop working.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (4)
1. A hybrid electric vehicle air conditioning system is characterized by comprising a range extender cooling circuit, a carriage heating circuit, a battery compartment heating circuit and a controller, wherein the carriage heating circuit is communicated with the range extender cooling circuit through a first electromagnetic valve, and the first electromagnetic valve is used for controlling cooling liquid to flow from the range extender cooling circuit to the carriage heating circuit; the carriage heating loop comprises an electric heater, a first electronic water pump, a warm air core body, a first valve body and a second valve body, and the electric heater is used for heating cooling liquid of the carriage heating loop; the battery compartment heating loop comprises a heat exchanger, a third electronic water pump, a battery pack, an intercooler and a water chilling unit, and the carriage heating loop and the battery compartment heating loop exchange heat through the heat exchanger; the system further includes a temperature sensor for detecting a coolant temperature of the range extender cooling circuit; the controller is used for controlling the opening and closing of the first electromagnetic valve and the opening and closing of the electric heater according to the temperature detected by the temperature sensor;
when the range extender participates in temperature rise, the first electromagnetic valve is opened, and the cooling liquid of the cooling loop of the range extender sequentially passes through the first electronic water pump, the electric heater, the warm air core body, the second valve body, the heat exchanger and the first valve body and exchanges heat with the cooling liquid in the heating loop of the battery compartment through the heat exchanger; when the range extender does not participate in temperature rise, the first electromagnetic valve is closed, the first electronic water pump pumps the cooling liquid in the compartment heating loop into the electric heater, and the heated cooling liquid passes through the heat exchanger and exchanges heat with the cooling liquid in the battery compartment heating loop;
the system further comprises a battery compartment refrigeration loop, the battery compartment refrigeration loop comprises a third electronic water pump, a battery pack, an intercooler, a water chilling unit and a heat exchanger, and refrigerant can flow into the water chilling unit through a second electromagnetic valve and exchange heat with cooling liquid of the battery compartment refrigeration loop.
2. A hybrid air conditioning system as set forth in claim 1, wherein; when the range extender participates in temperature rise, the first electromagnetic valve is opened, and cooling liquid of a cooling loop of the range extender sequentially passes through the first electronic water pump, the electric heater, the warm air core body, the second valve body and the first valve body and circulates in a compartment heating loop; when the range extender does not participate in temperature rise, the first electromagnetic valve is closed, the first electronic water pump pumps the cooling liquid in the compartment heating loop into the electric heater, and the heated cooling liquid circulates in the compartment heating loop.
3. A control method for the air conditioning system of the hybrid vehicle according to any one of claims 1 to 2, the air conditioning system comprising a range extender, an electric heater, a compressor, a VCU, an air conditioning controller, an electric water pump, and a valve body, the method comprising: receiving a heating/cooling request and sending the heating/cooling request to the VCU through a CAN bus; processing a request received through a CAN bus, if the request is a heating request, judging whether the temperature of the cooling liquid of the range extender reaches a temperature threshold value, and if the temperature reaches the temperature threshold value, providing a heat source by the range extender; if the temperature threshold is not reached, calculating the output power of the electric heater and controlling the electric heater to work at the output power, wherein a heat source is provided by the electric heater; if the request is a refrigeration request, calculating the rotating speed of the compressor and controlling the compressor to work; and sending an instruction to an air conditioner controller through a CAN bus so as to control the electronic water pump and the valve body to work.
4. A control method according to claim 3,
when the car has the heating demand or the battery compartment has the heating demand, include: when the temperature of the coolant of the range extender reaches a first temperature threshold value, the electric heater does not work, a heat source is provided by the range extender, and the VCU controls the air conditioner controller to work; when the temperature of the range extender cooling liquid does not reach the first temperature threshold value, the electric heater works, a heat source is provided by the electric heater, and the VCU controls the power output of the electric heater and the air conditioner controller to work; when the car and the battery compartment both have the heating requirement, the method comprises the following steps: when the temperature of the coolant of the range extender reaches a second temperature threshold value, the electric heater does not work, a heat source is provided by the range extender, and the VCU controls the air conditioner controller to work; when the temperature of the range extender cooling liquid does not reach a second temperature threshold value, the electric heater works, and the VCU controls the power output of the electric heater and the air conditioner controller to work; when the carriage has cooling demand and/or the battery compartment has cooling demand, include: the VCU calculates the rotating speed of the compressor and controls the compressor and the air conditioner controller to work; when the battery compartment has a cooling requirement, the battery compartment is cooled by cooling liquid in a battery compartment refrigerating circuit, and the cooling liquid of the battery compartment refrigerating circuit exchanges heat with a refrigerant.
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| CN109878291A (en) * | 2019-03-13 | 2019-06-14 | 浙江吉利新能源商用车集团有限公司 | Vehicle temperature adjustment control method and system |
| CN110261672A (en) * | 2019-06-14 | 2019-09-20 | 奇瑞汽车股份有限公司 | A kind of automobile-used PTC power measuring method |
| CN112319310B (en) | 2019-08-05 | 2022-03-25 | 宁德时代新能源科技股份有限公司 | Thermal management method of battery pack |
| CN111301100B (en) * | 2020-02-26 | 2021-11-26 | 重庆小康工业集团股份有限公司 | Vehicle thermal management method and device for extended-range vehicle |
| CN111746224A (en) * | 2020-06-16 | 2020-10-09 | 智新控制系统有限公司 | Range-extended electric vehicle thermal management system and control method thereof |
| CN111845702A (en) * | 2020-08-10 | 2020-10-30 | 北京理工大学 | Energy management method for plug-in hybrid electric vehicle |
| CN112922716B (en) * | 2021-02-03 | 2022-05-17 | 浙江吉利控股集团有限公司 | Control system and control method for electronic water pump of vehicle and vehicle |
| CN112977000A (en) * | 2021-04-21 | 2021-06-18 | 中汽研（天津）汽车工程研究院有限公司 | Thermal management system of pure electric vehicle |
| CN113815378A (en) * | 2021-07-20 | 2021-12-21 | 中国重汽集团济南动力有限公司 | Control system of temperature adjusting equipment of snow wax vehicle |
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