CN108454349B - Electric vehicle motor waste heat utilization device and utilization method thereof - Google Patents
Electric vehicle motor waste heat utilization device and utilization method thereof Download PDFInfo
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- CN108454349B CN108454349B CN201810119016.2A CN201810119016A CN108454349B CN 108454349 B CN108454349 B CN 108454349B CN 201810119016 A CN201810119016 A CN 201810119016A CN 108454349 B CN108454349 B CN 108454349B
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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
- B60H1/00392—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
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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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Abstract
The invention discloses a waste heat utilization device for an electric automobile motor, which comprises a first three-way pipe, a first water pump, a three-way valve, a radiator, a double-channel cooler and a second three-way pipe which are communicated, wherein a pipeline between the first water pump and the three-way valve flows through the motor and a motor control assembly to absorb waste heat; one flow passage of the double-flow-passage cooler is communicated with the three-way valve and the second three-way pipe, the other flow passage is communicated with the electric heater, the heating and ventilation air conditioner, the third three-way pipe and the second water pump, a second water temperature sensor is arranged between the electric heater and the heating and ventilation air conditioner, the third three-way pipe is communicated with the heating and ventilation system filling kettle, the control device is in communication connection with the first water pump, the second water pump, the first water temperature sensor, the second water temperature sensor, the three-way valve, the heating and ventilation air conditioner and the electric heater, and waste heat of the. The invention also discloses a method for utilizing the waste heat of the motor of the electric automobile.
Description
Technical Field
The invention relates to the technical field of motor waste heat, in particular to a device and a method for utilizing the motor waste heat of an electric automobile.
Background
In order to solve the problems of shortage of petroleum energy and reduction of urban air pollution, the pure electric vehicle capable of realizing energy conservation and emission reduction is widely concerned by people, and various domestic automobile manufacturers are actively researched and developed. However, in the manufacturing stage of the current electric vehicle, the energy consumption and the continuous mileage of the electric vehicle need to be improved. The electric quantity consumed by the heating of the electric vehicle seriously influences the continuous mileage of the electric vehicle.
The heating modes of the transmission electric vehicle mainly comprise the following modes:
1. the high-pressure air heating electric heater is arranged inside the air conditioning box, and a high-voltage wire is introduced into the cockpit, so that certain potential safety hazards exist. The air heating electric heater mainly heats air, when the heater works at the maximum power, the temperature in the PTC can reach 260 ℃, the surface of the core body can reach about 100 ℃, and the bonding silica gel is arranged between the PTC core bodies, so that the air heating electric heater has great peculiar smell at high temperature; meanwhile, the peripheral plastic parts are baked at high temperature for a long time, and the service life is shortened.
2. The high-pressure water heating electric heater is relatively safe, but has high energy consumption, and seriously influences the continuous mileage of the electric vehicle. The heating heat source is completely provided by the electric heater.
Therefore, how to provide a device for utilizing waste heat of an electric vehicle motor to reduce energy consumption and avoid influencing the driving range of the electric vehicle is a technical problem to be solved urgently by technical personnel in the field at present.
Disclosure of Invention
In view of this, the present invention provides a device for utilizing waste heat of a motor of an electric vehicle to reduce energy consumption and avoid affecting a driving range of the electric vehicle. The invention further aims to provide a utilization method based on the electric vehicle motor waste heat utilization device.
In order to achieve the purpose, the invention provides the following technical scheme:
the electric automobile motor waste heat utilization device comprises a first three-way pipe, a first water pump, a three-way valve, a radiator, a double-channel cooler and a second three-way pipe which are sequentially communicated, wherein the second three-way pipe is also communicated with the first three-way pipe, the electric automobile motor waste heat utilization device also comprises a control device, the double-channel cooler is a heat exchanger,
the first three-way pipe is also communicated with a filling kettle of the power system, a pipeline between the first water pump and the three-way valve flows through the motor and the motor control assembly to absorb waste heat,
a first water temperature sensor is arranged in a communication pipeline between the first water pump and the three-way valve,
the radiator and the double-channel cooler are arranged in parallel, and two ends of the radiator are respectively communicated with the three-way valve and the second three-way pipe; two ends of one flow passage of the double-flow passage cooler are respectively communicated with the three-way valve and the second three-way pipe, one end of the other flow passage of the double-flow passage cooler is sequentially communicated with an electric heater, a heating and ventilation air conditioner, a third three-way pipe and a second water pump, the second water pump is communicated with the other end of the other flow passage of the double-flow passage cooler, a second water temperature sensor is arranged on a communication pipeline between the electric heater and the heating and ventilation air conditioner, the third three-way pipe is also communicated with a heating and ventilation system filling kettle,
the control device is in communication connection with the first water pump, the second water pump, the first water temperature sensor, the second water temperature sensor, the three-way valve, the heating ventilation air conditioner and the electric heater.
Preferably, the radiator is further provided with a cooling fan, and the control device is in communication connection with the cooling fan.
Preferably, the first water pump and the second water pump are both electric water pumps.
The invention also provides a method for utilizing the waste heat of the motor of the electric automobile, which is based on the device for utilizing the waste heat of the motor of the electric automobile,
when the heating is not needed, the air conditioner is started,
when the water temperature T measured by the first water temperature sensor is more than or equal to T1, the control device controls the three-way valve to close a communication pipeline with the double-channel cooler and open a communication pipeline with the radiator,
when the water temperature T measured by the first water temperature sensor is less than or equal to T2, the control device controls the three-way valve to open a communication pipeline between the three-way valve and the double-channel cooler and close the communication pipeline between the three-way valve and the radiator,
wherein T1 > T2.
Preferably, the radiator is further provided with a heat radiation fan, the control device is in communication connection with the heat radiation fan,
when the water temperature T measured by the first water temperature sensor is more than or equal to T1:
if the water temperature T measured by the first water temperature sensor is less than or equal to T4, the heat radiation fan is closed,
if the first water temperature sensor detects that the water temperature T6 is more than or equal to T3, the cooling fan operates at the rotating speed N1,
if the first water temperature sensor detects that the water temperature T is more than or equal to T5, the cooling fan operates at the rotating speed N2,
wherein, T5 is more than T6 is more than T3 is more than T4, and N2 is more than N1.
Preferably, the method for utilizing the waste heat of the motor of the electric vehicle further includes that when the vehicle is started, the first water pump runs at a duty ratio of 20%, and the control device controls the three-way valve to open a communication pipeline between the three-way valve and the double-channel cooler and close the communication pipeline between the three-way valve and the radiator.
The invention also provides a method for utilizing the waste heat of the motor of the electric automobile, which is based on the device for utilizing the waste heat of the motor of the electric automobile,
when heating is required:
when the heating requirement is the defrosting and demisting mode,
the control device controls the three-way valve to close a communication pipeline with the double-flow-passage cooler and open a communication pipeline with the radiator,
the control device starts the electric heater and the second water pump, the control device controls the electric heater according to the signal of the second water temperature sensor,
the radiator is also provided with a radiating fan, the control device is in communication connection with the radiating fan, and meanwhile,
if the water temperature T measured by the first water temperature sensor is less than or equal to T8, the heat radiation fan is closed,
if the first water temperature sensor detects that the water temperature T10 is more than or equal to T7, the cooling fan operates at the rotating speed N3,
if the first water temperature sensor detects that the water temperature T is more than or equal to T9, the cooling fan operates at the rotating speed N4,
wherein, T9 is more than T10 is more than T7 is more than T8, and N4 is more than N3;
when the heating demand is in the heating mode,
when the water temperature T measured by the first water temperature sensor is less than or equal to T11, the control device controls the three-way valve to open a communication pipeline with the double-channel cooler and close a communication pipeline with the radiator, meanwhile, when the water temperature T measured by the second water temperature sensor is more than or equal to T12, the electric heater is closed, and when the water temperature T measured by the second water temperature sensor is less than or equal to T13, the electric heater is opened;
when the water temperature T measured by the first water temperature sensor is more than or equal to T14, the control device controls the three-way valve to close a communication pipeline with the double-channel cooler and open a communication pipeline with the radiator,
wherein T14 > T12 > T13 > T11.
The invention provides a motor waste heat utilization device of an electric automobile, which comprises a first three-way pipe, a first water pump, a three-way valve, a radiator, a double-flow-passage cooler and a second three-way pipe which are sequentially communicated, wherein the second three-way pipe is also communicated with the first three-way pipe; the two ends of one flow channel of the double-flow-channel cooler are respectively communicated with the three-way valve and the second three-way pipe, one end of the other flow channel of the double-flow-channel cooler is sequentially communicated with an electric heater, a heating and ventilation air conditioner, a third three-way pipe and a second water pump, the second water pump is communicated with the other end of the other flow channel of the double-flow-channel cooler, a second water temperature sensor is arranged on a communication pipeline between the electric heater and the heating and ventilation air conditioner, the third three-way pipe is further communicated with a heating and ventilation system filling kettle, and the control device is in communication connection with the first water pump, the second water pump, the first water temperature sensor, the second water temperature sensor, the three-way valve, the heating and ventilation air conditioner and the electric heater. The energy consumption can be reduced, and the influence on the driving range of the electric vehicle is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural connection diagram of a waste heat utilization device of an electric vehicle motor according to an embodiment of the present invention;
fig. 2 is a schematic communication connection diagram of a waste heat utilization device of an electric vehicle motor according to an embodiment of the present invention;
fig. 3 is a schematic view of an air-to-space ratio control curve of a first water pump controlled by a small circulation loop of a motor cooling system in the absence of a heating demand according to an embodiment of the present invention;
fig. 4 is a schematic view of an air-to-space ratio control curve of the first water pump controlled by the large circulation loop of the motor cooling system in the absence of heating demand according to the embodiment of the present invention;
fig. 5 is a schematic diagram of an air-to-space ratio control curve of the first water pump controlled by the large circulation loop of the motor cooling system in the defrosting and demisting mode according to the embodiment of the present invention.
In the above FIGS. 1-5:
the system comprises a power system water adding kettle 1, a first three-way pipe 2, a first water pump 3, a motor and motor controller assembly 4, a first water temperature sensor 5, a three-way valve 6, a cooling fan 7, a radiator 8, a double-channel cooler 9, a second three-way pipe 10, an electric heater 11, a second water temperature sensor 12, a heating and ventilation air conditioner 13, a second water pump 14, a third three-way pipe 15, a heating and ventilation system water adding kettle 16, a heat management module controller 17, a whole vehicle controller 18 and an air conditioner panel 19.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, fig. 1 is a schematic structural connection diagram of a waste heat utilization device of an electric vehicle motor according to an embodiment of the present invention; fig. 2 is a schematic communication connection diagram of a waste heat utilization device of an electric vehicle motor according to an embodiment of the present invention; fig. 3 is a schematic view of an air-to-space ratio control curve of a first water pump controlled by a small circulation loop of a motor cooling system in the absence of a heating demand according to an embodiment of the present invention; fig. 4 is a schematic view of an air-to-space ratio control curve of the first water pump controlled by the large circulation loop of the motor cooling system in the absence of heating demand according to the embodiment of the present invention; fig. 5 is a schematic diagram of an air-to-space ratio control curve of the first water pump controlled by the large circulation loop of the motor cooling system in the defrosting and demisting mode according to the embodiment of the present invention.
The electric automobile motor waste heat utilization device comprises a first three-way pipe 2, a first water pump 3, a three-way valve 6, a radiator 8, a double-channel cooler 9 and a second three-way pipe 10 which are sequentially communicated, wherein the second three-way pipe 10 is also communicated with the first three-way pipe 2, the double-channel cooler 9 is a heat exchanger, the first three-way pipe 2 is also communicated with a power system and a water injection kettle 1, a pipeline between the first water pump 3 and the three-way valve 6 flows through a motor and motor control assembly 4 to absorb waste heat, a first water temperature sensor 5 is arranged in a communication pipeline between the first water pump 3 and the three-way valve 6, the radiator 8 and the double-channel cooler 9 are arranged in parallel, and two ends of the radiator 8 are respectively communicated with the three-way valve 6 and the second three-way pipe 10; two ends of one flow passage of the double-flow-passage cooler 9 are respectively communicated with the three-way valve 6 and the second three-way pipe 10, one end of the other flow passage of the double-flow-passage cooler 9 is sequentially communicated with the electric heater 11, the heating and ventilation air conditioner 13, the third three-way pipe 15 and the second water pump 14, the second water pump 14 is communicated with the other end of the other flow passage of the double-flow-passage cooler 9, a second water temperature sensor 12 is arranged on a communication pipeline between the electric heater 11 and the heating and ventilation air conditioner 13, the third three-way pipe 15 is further communicated with a heating and ventilation system filling kettle 16, and the control device is in communication connection with the first water pump 3, the second water pump 14, the first water temperature sensor 5, the second water temperature sensor 12, the three-way valve 6, the heating and ventilation. The energy consumption can be reduced, and the influence on the driving range of the electric vehicle is avoided.
Wherein, radiator 8 still is provided with radiator fan 7, and controlling means and radiator fan 7 communication are connected. The first water pump 3 and the second water pump 14 are both electric water pumps.
Specifically, the embodiment of the invention further provides a method for utilizing the waste heat of the motor of the electric automobile, based on the device for utilizing the waste heat of the motor of the electric automobile described in any one of the embodiments,
when the heating is not needed, the air conditioner is started,
when the first water temperature sensor 5 detects that the water temperature T is more than or equal to T1, the motor is judged to need cooling because of no heating requirement, therefore, the control device controls the three-way valve 6 to close the communication pipeline with the double-channel cooler 9, opens the communication pipeline with the radiator 8, and radiates heat through the radiator 8,
when the water temperature T measured by the first water temperature sensor 5 is less than or equal to T2, at this time, because there is no heating demand, it is determined that the motor needs to be cooled, only the temperature is not high, the dual-flow-passage cooler 9 has a heat dissipation function even if the second water pump 14 is not opened, the housing of the dual-flow-passage cooler 9 also has heat exchange with the outside air, only the heat dissipation amount is lower than that of the radiator 8, the control device controls the three-way valve 6 to open the communication pipe with the dual-flow-passage cooler 9, and close the communication pipe with the radiator 8, at this time, the second water pump 14 is not opened, so that the dual-flow-passage cooler 9 does not have heat exchange, the dual-flow-passage cooler 9 is only used as the communication.
Wherein, the radiator 8 is also provided with a radiator fan 7, the control device is connected with the radiator fan 7 in a communication way,
when the first water temperature sensor 5 detects that the water temperature T is more than or equal to T1:
if the water temperature T measured by the first water temperature sensor 5 is less than or equal to T4, the cooling fan 7 is turned off, and the heat dissipation is determined to be performed only by the radiator 8 without the participation of the cooling fan 7,
if the water temperature T6 measured by the first water temperature sensor 5 is not less than T3, and the radiator fan 7 runs at the rotating speed N1, the operation is considered to be low-speed operation at this time, and it is determined that the radiator 8 does not radiate heat fast enough at this time, and the radiator fan 7 needs to participate, but the radiator fan 7 only needs to participate at low speed,
if the first water temperature sensor 5 detects that the water temperature T is greater than or equal to T5, the radiator fan 7 operates at the rotating speed N2, which can be considered as high-speed operation at this time, and it is determined that the radiator 8 does not radiate heat fast enough at this time, the radiator fan 7 needs to participate, but the water temperature T is higher, so the radiator fan 7 participates at high speed,
wherein, T5 is more than T6 is more than T3 is more than T4, and N2 is more than N1.
When the vehicle is started, the first water pump 3 operates at a duty ratio of 20%, and the control device controls the three-way valve 6 to open the communication pipeline with the double-channel cooler 9 and close the communication pipeline with the radiator 8.
Specifically, the embodiment of the invention further provides a method for utilizing the waste heat of the motor of the electric automobile, based on the device for utilizing the waste heat of the motor of the electric automobile described in any one of the embodiments,
when heating is required:
when the heating requirement is the defrosting and demisting mode, the defrosting and demisting mode is the existing mode and is widely applied to automobiles,
the control device controls the three-way valve 6 to close the communication pipeline with the double-channel cooler 9 and open the communication pipeline with the radiator 8, the radiator 8 is also provided with a radiator fan 7, the control device is in communication connection with the radiator fan 7, and simultaneously,
if the water temperature T measured by the first water temperature sensor 5 is less than or equal to T8, the cooling fan 7 is turned off, and the water temperature is judged to be too high, so that the heat supply for the heating, ventilation and air conditioning 13 is enough, the redundant heat needs to be cooled, only the radiator 8 is needed,
if the water temperature T10 measured by the first water temperature sensor 5 is not less than T7, and the radiator fan 7 runs at the rotating speed N3, the operation is considered to be low-speed operation at this time, and it is determined that the radiator 8 does not radiate heat fast enough at this time, and the radiator fan 7 needs to participate, but the radiator fan 7 only needs to participate at low speed,
if the first water temperature sensor 5 detects that the water temperature T is greater than or equal to T9, the radiator fan 7 operates at the rotating speed N4, which can be considered as high-speed operation at this time, and it is determined that the radiator 8 does not radiate heat fast enough at this time, the radiator fan 7 needs to participate, but the water temperature T is higher, so the radiator fan 7 participates at high speed,
wherein, T9 is more than T10 is more than T7 is more than T8, and N4 is more than N3;
when the heating demand is the heating mode, the heating mode is the existing mode, and is widely applied to automobiles,
when the first water temperature sensor 5 detects that the water temperature T is less than or equal to T11, the control device controls the three-way valve 6 to open a communication pipeline with the double-channel cooler 9 and close the communication pipeline with the radiator 8, meanwhile, when the second water temperature sensor 12 detects that the water temperature T is more than or equal to T12, the electric heater 11 is closed, and when the second water temperature sensor 12 detects that the water temperature T is less than or equal to T13, the electric heater 11 is opened;
when the first water temperature sensor 5 detects that the water temperature T is more than or equal to T14, the control device controls the three-way valve 6 to close the communication pipeline with the double-channel cooler 9, open the communication pipeline with the radiator 8,
wherein T14 > T12 > T13 > T11. The relations between N4 and N3 and N2 and N1 are N4-N2 and N3-N1.
In the actual implementation of the method, the first and second electrodes are arranged in parallel,
as shown in fig. 2, the control device includes a thermal management module controller 17 and a vehicle controller 18, the thermal management module controller 17 and the vehicle controller 18 communicate via a CAN, the thermal management module controller 17 and the vehicle controller 18 belong to the vehicle CAN, and the motor and motor controller assembly and the like belong to the power CAN. The heat management module controller 17 is connected with the first water pump 3, the second water pump 14, the first water temperature sensor 5, the second water temperature sensor 12, the heat radiation fan 7, the three-way valve 6 and the electric heater 11 through hard wires to transmit information. The thermal management module controller 17 is in signal communication with the air conditioning panel 19 via a LIN signal.
As shown in fig. 2, the thermal management module controller 17 receives information from the vehicle control unit 18 and the first water temperature sensor 5 to calculate how the first water pump 3 operates and control the three-way valve 6 to realize switching control between the large circulation and the small circulation of the motor cooling system. When the three-way valve 6 is in communication with the radiator 8, it is regarded as opening a large cycle, and when the three-way valve 6 is in communication with the two-flow cooler 9, it is regarded as opening a small cycle.
If the water circulation is a large circulation, the control device controls the on/off and high/low gear switching of the heat dissipation fan 7 according to the temperature signal of the first water temperature sensor 12. The thermal management module controller 17 controls the first water pump 3 through a PWM signal; the thermal management module controller 17 controls the fan high-speed relay and the fan low-speed relay to realize the switching of the fan assembly 7 and the high and low rotation speed switching.
In the specific implementation process, the first-stage reactor,
when the vehicle starts to run (when the key reaches 'ON' and the indicator lamp 'ready' ON the instrument begins to flash) and the whole vehicle is controlled by the cooling system when no heating demand exists, the heat management module controller 17 controls the first water pump 3 to start to run at a duty ratio of 20%, and the three-way valve 6 realizes a small circulation loop of the motor cooling system, namely only small circulation is started. The heat management module controller 17 detects the water outlet problem of the water circulation motor and the motor controller assembly 4 of the cooling system through the first water temperature sensor 5; when the water outlet temperature T is more than or equal to T1, the three-way valve 6 closes a small circulation loop of the motor cooling system and opens a large circulation loop of the motor cooling system. And when T is less than or equal to T2, the three-way valve 6 closes the large circulation loop of the motor cooling system and opens the small circulation loop of the motor cooling system.
Controlling a small circulation loop of the motor cooling system: the control device controls the duty ratio of the electric water pump 3 according to the water outlet temperature of the first water temperature sensor 5, and generates a control curve according to the initial point temperature Tiitial on the whole vehicle and the initial duty ratio of the electric water pump of 20 percent, wherein the curve is shown in figure 3, Y represents the duty ratio of the water pump, X represents the water outlet temperature, Tiitial refers to the initial water temperature detected by the system, and the small circulation loop control formula of the motor cooling system is as follows: y ═ 80X-4400)/(55-tuitial) + 100.
Controlling a motor cooling large circulation loop: the control device controls the duty ratio of the electric water pump 3 according to the outlet water temperature of the first water temperature sensor 5, as shown in figure 4, and the motor cooling large circulation loop control formula is as follows: Y-5X-225.
The cooling fan 7 is controlled according to the outlet water temperature of the first water temperature sensor 5: when the water temperature T of the first water temperature sensor 5 is more than or equal to T3, the cooling fan 7 is started at a low speed, and when the water temperature T is more than or equal to T4, the cooling fan 7 is closed at a low speed; when the temperature T of the first water temperature sensor 5 is more than or equal to T5, the cooling fan 7 is turned on at a high speed, and when the temperature T is less than or equal to T6, the cooling fan 7 is turned off at a high speed and turned on at a low speed.
In the specific implementation process, the first-stage reactor,
when the vehicle starts to run (when the key reaches 'ON' and the indicator lamp 'ready' ON the instrument begins to flash), and when the whole vehicle has a heating demand, the cooling system is controlled.
When the heating request is the defrosting and demisting mode, the thermal management module controller 17 receives a defrosting and demisting mode signal of the control panel 19 through an LIN signal, controls the air door angle and the fan rotating speed of the heating and ventilating air conditioner 13 through hard wires, simultaneously starts the second water pump 14 and the electric heater 11, and controls the heating power of the electric heater 12 through receiving a signal of the second water temperature sensor 12. The thermal management module controller 17 realizes a large circulation mode of the motor cooling system through the three-way valve 6, and controls the duty ratio of the first water pump 3 according to the outlet water temperature of the first water temperature sensor 5, as shown in fig. 5, the heating request is a formula in the defrosting and demisting mode: y ═ 80X-5200)/(65-tutial) + 100. The cooling fan 7 is controlled according to the outlet water temperature of the first water temperature sensor 5: when the temperature T of the first water temperature sensor 5 is more than or equal to T7, the cooling fan 7 is started at a low speed, and when the temperature T is more than or equal to T8, the cooling fan 7 is closed at a low speed; when the temperature T of the first water temperature sensor 5 is more than or equal to T9, the cooling fan 7 is turned on at a high speed, and when the temperature T is less than or equal to T10, the cooling fan 7 is turned off at a high speed and turned on at a low speed.
When the heating request is in a heating mode, the thermal management module controller 17 receives a heating gear and a heating air volume gear signal of the control panel 19 through an LIN signal, and controls the air door angle of the heating ventilation air conditioner 13 and the rotating speed of the fan through hard wires. When the temperature T of the first water temperature sensor 5 is less than or equal to T11, the thermal management module controller 17 realizes a small circulation mode of the motor cooling system through the three-way valve 6, when the temperature T of the second water temperature sensor 12 is greater than or equal to T12, the electric heater 11 is in a closed state, all heat sources in a heating mode are realized through circulating water of the small circulation heating ventilation system of the motor cooling system, water in two circulation loops exchanges heat in the double-flow-passage cooler 9, when the temperature T of the second water temperature sensor 12 is less than or equal to T13, the thermal management module controller 17 controls the electric heater 11 to be opened, and the power of the electric heater 11 is controlled according to heating gears and heating air volume gear signals of the second water temperature sensor 12, the control panel 19. When the temperature T of the first water temperature sensor 5 is larger than or equal to T14, the thermal management module controller 17 realizes a large circulation mode of the motor cooling system through the three-way valve 6. When the temperature T of the first water temperature sensor 5 is less than or equal to T15, the thermal management module controller 17 realizes a small circulation mode of the motor cooling system through the three-way valve 6.
The temperature threshold value, the duty ratio of the electronic water pump, the control channel switching of the three-way valve 6 and the control of the power of the electric heater 44 can be matched and adjusted according to different power system components and the heating requirement of the whole vehicle. The control mode saves energy on the premise of ensuring the safety of the system. The memory function of the heat pipeline module ensures the maintenance aspect.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (5)
1. The device for utilizing the waste heat of the motor of the electric automobile is characterized by comprising a first three-way pipe, a first water pump, a three-way valve, a radiator, a double-channel cooler and a second three-way pipe which are sequentially communicated, wherein the second three-way pipe is also communicated with the first three-way pipe, the device also comprises a control device, the double-channel cooler is a heat exchanger, wherein,
the first three-way pipe is also communicated with a filling kettle of the power system, a pipeline between the first water pump and the three-way valve flows through the motor and the motor control assembly to absorb waste heat,
a first water temperature sensor is arranged in a communication pipeline between the first water pump and the three-way valve,
the radiator and the double-channel cooler are arranged in parallel, and two ends of the radiator are respectively communicated with the three-way valve and the second three-way pipe; two ends of one flow passage of the double-flow passage cooler are respectively communicated with the three-way valve and the second three-way pipe, one end of the other flow passage of the double-flow passage cooler is sequentially communicated with an electric heater, a heating and ventilation air conditioner, a third three-way pipe and a second water pump, the second water pump is communicated with the other end of the other flow passage of the double-flow passage cooler, a second water temperature sensor is arranged on a communication pipeline between the electric heater and the heating and ventilation air conditioner, the third three-way pipe is also communicated with a heating and ventilation system filling kettle,
the control device is in communication connection with the first water pump, the second water pump, the first water temperature sensor, the second water temperature sensor, the three-way valve, the heating, ventilation and air conditioning unit and the electric heater,
the radiator is also provided with a radiating fan, the control device is in communication connection with the radiating fan,
the first water pump and the second water pump are both electric water pumps,
when no heating is needed, when the water temperature T measured by the first water temperature sensor is more than or equal to T1, the control device controls the three-way valve to close the communication pipeline with the double-channel cooler and open the communication pipeline with the radiator,
when the water temperature T measured by the first water temperature sensor is less than or equal to T2, the motor needs to be cooled, the control device controls the three-way valve to open a communication pipeline with the double-channel cooler and close the communication pipeline with the radiator, wherein T1 is more than T2.
2. A method for utilizing the waste heat of the motor of the electric automobile, which is based on the device for utilizing the waste heat of the motor of the electric automobile in claim 1,
when the heating is not needed, the air conditioner is started,
when the water temperature T measured by the first water temperature sensor is more than or equal to T1, the control device controls the three-way valve to close a communication pipeline with the double-channel cooler and open a communication pipeline with the radiator,
when the water temperature T measured by the first water temperature sensor is less than or equal to T2, the motor needs to be cooled, the control device controls the three-way valve to open a communication pipeline with the double-channel cooler and close the communication pipeline with the radiator,
wherein T1 > T2.
3. The method for utilizing the waste heat of the motor of the electric automobile as claimed in claim 2, wherein the heat sink is further provided with a heat dissipation fan, the control device is in communication connection with the heat dissipation fan,
when the water temperature T measured by the first water temperature sensor is more than or equal to T1:
if the water temperature T measured by the first water temperature sensor is less than or equal to T4, the heat radiation fan is closed,
if the first water temperature sensor detects that the water temperature T6 is more than or equal to T3, the cooling fan operates at the rotating speed N1,
if the first water temperature sensor detects that the water temperature T is more than or equal to T5, the cooling fan operates at the rotating speed N2,
wherein, T5 is more than T6 is more than T3 is more than T4, and N2 is more than N1.
4. The method for utilizing the waste heat of the motor of the electric automobile according to claim 2, further comprising the step of operating the first water pump at a duty ratio of 20% when the vehicle is started, wherein the control device controls the three-way valve to open a communication pipeline with the dual-flow cooler and close the communication pipeline with the radiator.
5. A method for utilizing the waste heat of the motor of the electric automobile, which is based on the device for utilizing the waste heat of the motor of the electric automobile in claim 1,
when heating is required:
when the heating requirement is the defrosting and demisting mode,
the control device controls the three-way valve to close a communication pipeline with the double-flow-passage cooler and open a communication pipeline with the radiator,
the control device starts the electric heater and the second water pump, the control device controls the electric heater according to the signal of the second water temperature sensor,
the radiator is also provided with a radiating fan, the control device is in communication connection with the radiating fan, and meanwhile,
if the water temperature T measured by the first water temperature sensor is less than or equal to T8, the heat radiation fan is closed,
if the first water temperature sensor detects that the water temperature T10 is more than or equal to T7, the cooling fan operates at the rotating speed N3,
if the first water temperature sensor detects that the water temperature T is more than or equal to T9, the cooling fan operates at the rotating speed N4,
wherein, T9 is more than T10 is more than T7 is more than T8, and N4 is more than N3;
when the heating demand is in the heating mode,
when the water temperature T measured by the first water temperature sensor is less than or equal to T11, the control device controls the three-way valve to open a communication pipeline with the double-channel cooler and close a communication pipeline with the radiator, meanwhile, when the water temperature T measured by the second water temperature sensor is more than or equal to T12, the electric heater is closed, and when the water temperature T measured by the second water temperature sensor is less than or equal to T13, the electric heater is opened;
when the water temperature T measured by the first water temperature sensor is more than or equal to T14, the control device controls the three-way valve to close a communication pipeline with the double-channel cooler and open a communication pipeline with the radiator,
wherein T14 > T12 > T13 > T11.
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| CN201810119016.2A CN108454349B (en) | 2018-02-06 | 2018-02-06 | Electric vehicle motor waste heat utilization device and utilization method thereof |
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| CN108454349B true CN108454349B (en) | 2020-06-26 |
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| CN109968940B (en) * | 2019-03-12 | 2021-01-29 | 华为技术有限公司 | Air conditioning system applied to electric automobile and electric automobile |
| CN112373271B (en) * | 2020-11-30 | 2022-06-07 | 重庆长安汽车股份有限公司 | Integrated mounting bracket and vehicle |
| CN113276629B (en) * | 2021-06-22 | 2022-06-24 | 东风汽车集团股份有限公司 | Electric vehicle motor waste heat utilization system and control method thereof |
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| US20130175022A1 (en) * | 2010-09-23 | 2013-07-11 | Jonathan King | Thermal management system for battery electric vehicle |
| CN203339273U (en) * | 2013-05-30 | 2013-12-11 | 天津清源电动车辆有限责任公司 | Device for heating cell box through afterheat of heating devices in electric vehicle |
| CN103280609A (en) * | 2013-05-30 | 2013-09-04 | 天津清源电动车辆有限责任公司 | Device for heating battery box by waste heat of heat generating equipment in electric automobile |
| TWI543888B (en) * | 2013-11-06 | 2016-08-01 | Automotive Res & Testing Ct | Electric car thermal management system |
| DE102014226346A1 (en) * | 2014-12-18 | 2016-06-23 | Bayerische Motoren Werke Aktiengesellschaft | Heating system for an electric or hybrid vehicle |
| JP2017071329A (en) * | 2015-10-08 | 2017-04-13 | 三菱自動車工業株式会社 | Vehicle heating system |
| DE102015222978B4 (en) * | 2015-11-20 | 2021-08-26 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Baggage tractor and method of operating a baggage tractor |
| CN105984304A (en) * | 2016-05-03 | 2016-10-05 | 浙江吉利控股集团有限公司 | Whole vehicle heat management system of pure electric vehicle |
| CN105922842B (en) * | 2016-05-18 | 2018-08-07 | 东南（福建）汽车工业有限公司 | A kind of electric vehicle heating system energy-saving equipment and its power-economizing method |
| CN206306827U (en) * | 2016-12-19 | 2017-07-07 | 深圳市沃特玛电池有限公司 | A kind of radiating of electric automobile and heating system |
| CN206357959U (en) * | 2017-01-06 | 2017-07-28 | 重庆长安汽车股份有限公司 | A kind of pure electric automobile waste heat utilization system |
| CN107379920A (en) * | 2017-06-27 | 2017-11-24 | 深圳市沃特玛电池有限公司 | The warm air system and its control method of a kind of electric automobile |
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