CN110015195B - Electric vehicle heat management system - Google Patents

Electric vehicle heat management system Download PDF

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Publication number
CN110015195B
CN110015195B CN201710901700.1A CN201710901700A CN110015195B CN 110015195 B CN110015195 B CN 110015195B CN 201710901700 A CN201710901700 A CN 201710901700A CN 110015195 B CN110015195 B CN 110015195B
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China
Prior art keywords
temperature
pipeline
power battery
cooling
loop
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Application number
CN201710901700.1A
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Chinese (zh)
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CN110015195A (en
Inventor
杨少清
张少丕
李嘉
魏维
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Yutong Bus Co Ltd
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Zhengzhou Yutong Bus Co Ltd
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Priority to CN201710901700.1A priority Critical patent/CN110015195B/en
Priority to PCT/CN2018/108411 priority patent/WO2019062870A1/en
Publication of CN110015195A publication Critical patent/CN110015195A/en
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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00271—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit
    • B60H1/00278—HVAC devices specially adapted for particular vehicle parts or components and being connected to the vehicle HVAC unit for the battery
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00357—Air-conditioning arrangements specially adapted for particular vehicles
    • B60H1/00385—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell
    • B60H1/00392—Air-conditioning arrangements specially adapted for particular vehicles for vehicles having an electrical drive, e.g. hybrid or fuel cell for electric vehicles having only electric drive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/42—Drive Train control parameters related to electric machines
    • B60L2240/425—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2240/00—Control parameters of input or output; Target parameters
    • B60L2240/40—Drive Train control parameters
    • B60L2240/54—Drive Train control parameters related to batteries
    • B60L2240/545—Temperature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

The invention provides an electric vehicle heat management system, which comprises a first pipeline loop and a second pipeline loop, wherein heat exchange is carried out between the first pipeline loop and the second pipeline loop through a heat exchanger; a braking resistance heater and a device with working temperature meeting a first temperature condition are arranged in the first pipeline loop, and a power battery heating device and a device with working temperature meeting a second temperature condition are arranged in the second pipeline loop; the heat exchanger is provided with a first pipeline and a second pipeline, the first pipeline is arranged in the first pipeline loop, and the second pipeline is arranged in the second pipeline loop; the temperature value of the first temperature condition is greater than the temperature value of the second temperature condition. According to the technical scheme provided by the invention, the equipment with higher requirement on the temperature value is arranged in the first pipeline loop, and the equipment with relatively lower requirement on the temperature value and larger range change is arranged in the second pipeline loop, so that different requirements of each component on the temperature are met, and the temperature of each component is conveniently controlled.

Description

Electric vehicle heat management system
Technical Field
The invention belongs to the technical field of electric vehicle heat management, and particularly relates to an electric vehicle heat management system.
Background
The new energy passenger car, especially the pure electric passenger car, because of the limitation of its driving method, does not have engine waste heat to be used for providing the warm braw for the vehicle when heating in winter, makes the heating effect of vehicle relatively poor, and this problem is especially outstanding in winter. Since the comfort of the driver and passengers is seriously affected by the excessively low temperature in the vehicle compartment, measures are required to heat the vehicle. At present, the common heating mode on the vehicle is to arrange an electric air conditioner and an electric auxiliary heating device on the vehicle, and the two devices are matched to use the vehicle for heating. However, when the electric air conditioner and the electric auxiliary heater work, the power battery is needed to be adopted to supply power, so that the power consumption of the vehicle is increased, the power consumption of the power battery is too high, the endurance mileage of the vehicle is reduced, and the endurance mileage can be reduced by more than 30% under certain working conditions. And because the temperature is very low in the morning in winter, the power battery core body temperature is too low to absorb the electric energy fed back by the vehicle in a long time after the vehicle is started, so that the energy consumption of the vehicle after the vehicle is started is further increased.
Disclosure of Invention
The invention provides an electric vehicle heat management system which is used for meeting the temperature requirements of different parts on an electric vehicle in cold weather.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
an electric vehicle heat management system comprises a first pipeline loop and a second pipeline loop, wherein heat exchange is carried out between the first pipeline loop and the second pipeline loop through a heat exchanger;
a brake resistance heater and a device with working temperature meeting a first temperature condition are arranged in the first pipeline loop, and the brake resistance heater is used for cooling the brake resistance and heating the cooling liquid in the first pipeline loop;
a power battery temperature adjusting device and a device with working temperature meeting a second temperature condition are arranged in the second pipeline loop, and the power battery temperature adjusting device is used for heating or cooling the power battery;
the heat exchanger is provided with a first pipeline and a second pipeline, wherein the first pipeline is arranged in a first pipeline loop, and the second pipeline is arranged in a second pipeline loop;
the first temperature condition is that the temperature is higher than a first temperature set value, and the second temperature condition is that the temperature is lower than a second temperature set value; the first temperature set point is greater than the second temperature set point.
According to the technical scheme provided by the invention, the power battery is heated by heat generated by the brake resistor during energy-consumption braking, so that the temperature of the power battery is increased, the fed-back electric energy can be absorbed, and the endurance mileage of the vehicle is increased. According to the technical scheme provided by the invention, the brake resistance heater with higher requirement on the temperature value and the device with the working temperature meeting the first temperature condition are arranged in the first pipeline loop, and the heating device with relatively lower requirement on the temperature value and large variation range and the device with the working temperature meeting the second temperature condition are arranged in the second pipeline loop, so that different requirements of each component on the temperature are met, and the temperature of each component is conveniently controlled.
Furthermore, the device with the working temperature meeting the second temperature condition is a cooling device, and the cooling device is arranged at the driving motor and/or the motor controller and used for cooling the driving motor and/or the motor controller.
The heat generated by the driving motor and/or the motor controller during working is used for heating the cooling liquid of the second pipeline loop, so that the energy loss of the brake resistance heater can be reduced, the energy loss of a battery can be reduced, and the endurance mileage of the vehicle can be increased.
Further, a cooling fan is arranged at the position of the pipeline connected with the cooling device and used for controlling the temperature value of the cooling liquid flowing into the cooling device.
The cooling fan is adopted to control the temperature value of the cooling liquid flowing into the cooling device, so that the temperature of the cooling liquid flowing into the cooling device is not too high, and the working state of the driving motor and/or the motor controller is not influenced.
Furthermore, a temperature sensor is arranged on a pipeline connected with the cooling device and used for detecting the temperature of the cooling liquid flowing into the cooling device and controlling the working state of the electric fan according to the data detected by the temperature sensor.
The provision of the temperature sensor enables the temperature of the coolant flowing into the cooling device to be monitored.
Further, a first water tank and a first water pump are arranged in the first pipeline loop.
Further, a second water tank and a second water pump are arranged in the second pipeline loop.
Set up water tank and water pump in first pipeline return circuit and second pipeline return circuit respectively, can adjust the circulating speed of coolant liquid, manage the heat of vehicle more easily.
Furthermore, the power battery temperature adjusting device is also provided with a pipeline, and the pipeline is provided with a one-way valve.
When the power battery temperature adjusting device is not needed to work, the heating device can be bypassed through the one-way valve.
Further, still be equipped with temperature regulation apparatus in the second pipeline return circuit, temperature regulation apparatus is used for setting up in the air conditioner for provide the heat for air conditioner condenser when air conditioner condenser defrosting, perhaps cool down for the coolant liquid in the second pipeline return circuit when power battery needs the cooling.
The temperature adjusting device is arranged to provide heat for the air conditioner, and waste heat of the vehicle can be fully utilized.
Furthermore, the temperature adjusting device is also provided with a pipeline, and the pipeline is provided with a one-way valve.
When the thermostat is not required to operate, the thermostat may be bypassed by a one-way valve.
The device with the working temperature meeting the first temperature condition is a carriage heating device, the carriage heating device comprises a radiator and/or an electric defroster, the radiator is used for heating a carriage of a vehicle, and the electric defroster is used for defrosting glass of the carriage.
The carriage heating device for heating the carriage can utilize braking energy to heat the interior of the carriage and/or defrost glass.
Furthermore, the carriage heating device is also provided with a pipeline, and the pipeline is provided with a one-way valve.
When the compartment heater is not needed to work, the compartment heater can be bypassed through the one-way valve.
Further, the heat exchanger is a plate heat exchanger.
Furthermore, a temperature sensor is arranged on a pipeline connected with the power battery temperature adjusting device and used for detecting the temperature of the cooling liquid flowing into the power battery temperature adjusting device and controlling the working efficiency of the heat exchanger according to data detected by the temperature sensor.
The temperature sensor is arranged to detect the temperature of the cooling liquid flowing into the power battery temperature adjusting device, so that the cooling or heating effect of the power battery is guaranteed.
Furthermore, a temperature sensor is arranged on a pipeline connected with the brake resistance heater and used for detecting the temperature of the cooling liquid flowing out of the brake resistance heater and controlling the power of the brake resistance heater according to data detected by the temperature sensor.
The temperature sensor is arranged to detect the temperature of the cooling liquid flowing out of the brake resistor heater, so that the cooling effect of the brake resistor is guaranteed, and the working temperature is guaranteed to meet the requirement of the first temperature condition device for the temperature.
Furthermore, the first pipeline of the heat exchanger is also provided with a pipeline, and the pipeline is provided with a one-way valve.
When no heat exchange is required between the first and second pipe circuits, the heat exchanger may be bypassed by a one-way valve.
Drawings
Fig. 1 is a block diagram of an electric vehicle management system provided in the embodiment.
Detailed Description
The invention provides an electric vehicle heat management system which is used for meeting the temperature requirements of different parts on an electric vehicle in cold weather.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
an electric vehicle heat management system comprises a first pipeline loop and a second pipeline loop, wherein heat exchange is carried out between the first pipeline loop and the second pipeline loop through a heat exchanger;
a brake resistance heater and a device with working temperature meeting a first temperature condition are arranged in the first pipeline loop, and the brake resistance heater is used for cooling the brake resistance and heating the cooling liquid in the first pipeline loop;
a power battery temperature adjusting device and a device with working temperature meeting a second temperature condition are arranged in the second pipeline loop, and the power battery temperature adjusting device is used for heating or cooling the power battery;
the heat exchanger is provided with a first pipeline and a second pipeline, wherein the first pipeline is arranged in a first pipeline loop, and the second pipeline is arranged in a second pipeline loop;
the first temperature condition is that the temperature is higher than a first temperature set value, and the second temperature condition is that the temperature is lower than a second temperature set value; the first temperature set point is greater than the second temperature set point.
The technical solution of the present invention is further illustrated by the following specific examples.
The embodiment provides an electric vehicle heat management system for setting up on electric vehicle, carry out reasonable distribution to electric vehicle's heat, improve electric vehicle's continuation of the journey mileage.
The structural principle of the electric vehicle heat management system provided by the embodiment is as shown in fig. 1, and the electric vehicle heat management system comprises a first pipeline loop and a second pipeline loop, wherein heat exchange is performed between the first pipeline loop and the second pipeline loop through a heat exchanger. The heat exchanger is a plate heat exchanger and is provided with a first pipeline and a second pipeline.
The first pipeline loop is a braking resistance heater 11, the braking resistance heater 11 is connected in series with the hydroelectric defroster 13, the first pipeline of the heat exchanger 1, the first water tank 14 and the first water pump 15 through pipelines to form a loop, and the loop is the first pipeline loop. An electronic one-way valve 102 is arranged on a pipeline of the braking resistance heater 11 connected with the electric defroster 13, a pipeline formed by connecting the electronic one-way valve 102 and the electric defroster 13 is provided with two pipelines, a radiator 12 and an electronic one-way valve 101 are arranged in series in one pipeline, and an electronic one-way valve 103 is arranged in the other pipeline. The first pipeline of the heat exchanger 1 is also provided with a pipeline, and the pipeline is provided with an electronic one-way valve 104 in series. The brake resistance heating device 11 is arranged at a brake resistance of the vehicle, and when the power battery cannot receive the energy fed back by the vehicle, the heat generated by the brake resistance during energy consumption braking is used for heating the cooling liquid in the first pipeline loop and cooling the brake resistance; when the power battery can accept the energy feedback of the vehicle, if the brake resistor works in a heater mode, the electric energy of the power battery is used for heating the cooling liquid to provide heat for the first pipeline loop; the electric defroster 13 defrosts the glass of the vehicle by using the heat of the braking resistance heater, and the radiator 12 is installed in the vehicle to heat the vehicle compartment by using the heat of the braking resistance heater.
The second pipeline loop is formed by connecting a temperature adjusting device 21, a power battery temperature adjusting device 22, a second water tank 23, a second water pump 24, a cooling device and a second pipeline of the heat exchanger 1 in series through pipelines, wherein the temperature adjusting device 21 is arranged at an air conditioner, and can use cooling liquid in the second pipeline loop to provide heat for a condenser of the air conditioner and defrost the condenser of the air conditioner in winter or use the refrigeration effect of the air conditioner to cool the cooling liquid in the second pipeline loop; the power battery temperature adjusting device 22 is arranged in the power battery and used for heating or cooling the power battery and keeping the temperature of the power battery; the cooling device comprises a first cooling device 261 and a second cooling device 262, wherein the first cooling device 261 is arranged in a driving motor of the vehicle and used for cooling the driving motor, and the second cooling device 262 is arranged in the motor controller and used for cooling the motor brake. An electric fan 25 is disposed beside the pipe connecting the first cooling device 261 and the second cooling device 262, and the electric fan 25 is used for cooling the coolant flowing into the first cooling device 261 and the second cooling device 262. The temperature adjusting device 21 is provided with a valve 202, and the power battery temperature adjusting device 22 is provided with a valve 201.
A temperature sensor 31 is provided in a pipe connecting the braking resistance heater 11 to the electric defroster 13, and the heating power of the braking resistance heater 11 is controlled based on data detected by the temperature sensor 31. A temperature sensor 32 is provided at a pipe where the thermostat 21 is connected to the power battery thermostat 22, and the heat exchange power of the heat exchanger 1 is controlled based on data detected by the temperature sensor 32. A temperature sensor 33 is provided in a pipe connecting the first cooling device 261 and the second cooling device 262, and the operation state of the electric fan 252 is controlled based on data detected by the temperature sensor 33.
When the temperature is lower in the low temperature morning in winter, the working mode of the heat supply system provided by the embodiment is as follows:
controlling the electronic one-way valve 202 to be closed, the electronic one-way valve 201 to be opened, obtaining heat from the first pipeline loop through the heat exchanger 1 by the second pipeline loop for heating the power battery, and controlling the heat exchange power of the heat exchanger 1 according to the temperature detected by the temperature sensor 32 to ensure that the water inlet temperature of the power battery meets the heating requirement of the power battery, for example, controlling the data detected by the temperature sensor 32 to be between 50 and 55 ℃; and at the same time, the operating state of the electric fan 25 is controlled according to the data detected by the temperature sensor 33 to ensure that the temperature of the cooling liquid entering the first cooling device 261 and the second cooling device 262 meets the heat dissipation requirement of the driving motor and the motor controller, for example, the data detected by the temperature sensor 33 is controlled not to be more than 55 ℃. When the temperature of the power battery reaches the temperature required by full-power work, the power battery heats in the working process, the temperature can be self-maintained, external heat is not needed any more, the electronic one-way valve 201 is opened at the moment, the heating device 22 is bypassed, and cooling liquid does not flow through the power battery temperature adjusting device 22 any more. After the second pipeline loop operates for a period of time, the power battery can maintain the temperature required by the work by the heat generated by the driving motor and the motor controller and the heat generated by the self-heating of the power battery without losing the temperature, and the working state of the electric fan 25 can be controlled to ensure that the system is not over-temperature, so that the heat generated by the driving motor and the motor driver is effectively utilized. Meanwhile, after the electronic one-way valve 202 is closed, redundant heat can be used for defrosting of the air conditioner condenser, the defrosting time of the air conditioner is shortened, and the working efficiency of the air conditioner is improved. Because the system makes full use of the heat generated by the energy consumption braking and electric driving system, the power consumption of the system can be greatly reduced when the system is used in winter, and the endurance mileage of the vehicle is increased.
In the working mode of the low-temperature system in summer, under the combined action of the air-conditioning refrigeration unit and the electric fan 25, the water inlet temperature of the power battery temperature adjusting device 22 is not higher than 25 ℃, the water inlet temperature of the first cooling device 261 and the second cooling device 262 is not higher than 55 ℃, the electronic one-way valve 201 and the electronic one-way valve 202 are both closed, and the system controls the water temperature by adjusting the power of the air-conditioning refrigeration unit and the electric fan 25 and the flow rate of a water circulation system. And the heat generated by the operation of the brake resistor in the first pipeline circuit is exchanged into the second pipeline circuit through the heat exchanger and is consumed in the second pipeline circuit. In summer, the system cannot accept electric feedback due to the fact that the power battery core body is over-cooled, so that the brake resistor intermittently works only when the SOC of the power battery is too high, and the working frequency is low.
Working mode of the winter high-temperature system: the electronic one-way valve 101 and the electronic one-way valve 102 are opened, the electronic one-way valve 103 and the electronic one-way valve 104 are closed, the brake resistance heater 11 works to ensure that the data detected by the temperature sensor 31 is not less than 70 ℃, the interior of the vehicle is heated through the radiator 12, the front windshield is defrosted through the hydroelectric defroster 13, and a part of heat is transferred to the second pipeline loop through the heat exchanger 1. The brake resistance heater 11 may either directly utilize the heat generated by dynamic braking of the vehicle or operate in a heater mode to heat the coolant in the first conduit loop. The first pipe loop adjusts the operation power of the braking resistance heater 11 and the heat exchange power of the heat exchanger 1 according to the temperature fed back by the temperature sensor 31. And the flow rate and the water pressure of the water channel are adjusted through the first water pump 15, so that the temperature stability of the system is ensured.
In summer, the compartment does not need to be heated, the hydroelectric defroster 13 works at a natural wind gear, the electronic one-way valve 102 and the electronic one-way valve 101 are closed, and the electronic one-way valve 104 and the electronic one-way valve 103 are opened. When the vehicle SOC is too high, the first water pump 15 starts to operate, the electronic check valve 104 is closed, and heat generated by the brake resistor due to electric braking is exchanged into the low-temperature pipeline loop through the heat exchanger 1, and is cooled and dissipated by the low-temperature pipeline loop. When the SOC is reduced to a level where the power battery can absorb the electric energy generated by the electric feedback, the electronic check valve 104 is closed, the first water pump 15 stops working, and the first pipe loop stops working.
In this embodiment, the power battery temperature adjusting device 22 may be a water-cooled plate inside the water-cooled battery, or may be a pipe arranged inside the power battery, and any device that is arranged at the power battery and can provide heat exchange for the power battery may be used as the heating device 22 in this embodiment.
In this embodiment, the brake resistor heater 11 is a water-cooled brake resistor that meets the vehicle type II brake power requirement through matching calculation, and it can also work in a heater state, and heat the coolant flowing through the brake resistor by brake feedback or battery energy, and use it as a system heat source.

Claims (7)

1. The electric vehicle heat management system is characterized by comprising a first pipeline loop and a second pipeline loop, wherein heat exchange is carried out between the first pipeline loop and the second pipeline loop through a heat exchanger;
a brake resistance heater and a device with working temperature meeting a first temperature condition are arranged in the first pipeline loop, and the brake resistance heater is used for cooling the brake resistance and heating the cooling liquid in the first pipeline loop; a first temperature sensor is arranged on a pipeline connected with the brake resistance heater and used for detecting the temperature of cooling liquid flowing out of the brake resistance heater and controlling the power of the brake resistance heater according to data detected by the first temperature sensor;
a power battery temperature adjusting device, a second temperature adjusting device and a cooling device with working temperature meeting a second temperature condition are arranged in the second pipeline loop, and the power battery temperature adjusting device is used for heating or cooling the power battery;
the power battery temperature adjusting device is also provided with a pipeline, and a first electronic one-way valve is arranged on the pipeline; a second temperature sensor is arranged on a pipeline connected with the power battery temperature adjusting device and used for detecting the temperature of cooling liquid flowing into the power battery temperature adjusting device and controlling the working efficiency of the heat exchanger according to data detected by the second temperature sensor;
the second temperature adjusting device is arranged in the air conditioner and used for providing heat for the air conditioner condenser when the air conditioner condenser is defrosted or cooling the cooling liquid in the second pipeline loop when the power battery needs to be cooled; the second temperature regulating device is also provided with a pipeline, and a second electronic one-way valve is arranged on the pipeline;
the cooling device comprises a first cooling device and a second cooling device, wherein the first cooling device is arranged in a driving motor of the vehicle and used for cooling the driving motor, and the second cooling device is arranged in the motor controller and used for cooling the motor controller; an electric fan is arranged beside a pipeline connecting the first cooling device and the second cooling device and used for cooling the cooling liquid flowing into the first cooling device and the second cooling device; a third temperature sensor is arranged on a pipeline connected with the cooling device and used for detecting the temperature of the cooling liquid flowing into the cooling device and controlling the working state of the electric fan according to the data detected by the third temperature sensor;
the heat exchanger is provided with a first pipeline and a second pipeline, wherein the first pipeline is arranged in a first pipeline loop, and the second pipeline is arranged in a second pipeline loop;
the first temperature condition is that the temperature is higher than a first temperature set value, and the second temperature condition is that the temperature is lower than a second temperature set value; the first temperature set value is greater than the second temperature set value;
when the temperature is low in the morning in winter, the working mode of the electric vehicle heat management system is as follows:
the first electronic one-way valve is controlled to be closed, the second electronic one-way valve is controlled to be opened, the second pipeline loop obtains heat from the first pipeline loop through the heat exchanger for heating the power battery, and the heat exchange power of the heat exchanger is controlled according to the temperature detected by the second temperature sensor, so that the water inlet temperature of the power battery can meet the heating requirement of the power battery; meanwhile, the working state of the electric fan is controlled according to the data detected by the third temperature sensor, so that the temperature of the cooling liquid entering the first cooling device and the second cooling device is ensured to meet the heat dissipation requirements of the driving motor and the motor controller;
when the temperature of the power battery reaches the temperature required by full-power work, the power battery heats in the working process, the temperature can be self-maintained, external heat is not needed any more, the first electronic one-way valve is opened at the moment, the power battery temperature adjusting device is bypassed, and cooling liquid does not flow through the power battery temperature adjusting device any more; after the second pipeline loop operates for a period of time, the power battery can maintain the temperature required by the work by the heat generated by the driving motor and the motor controller and the heat generated by the self-heating of the power battery without losing the temperature, and can ensure that the system is not over-temperature by controlling the working state of the electric fan, so that the heat generated by the driving motor and the motor driver is effectively utilized; meanwhile, the second electronic one-way valve is closed, and redundant heat can be used for defrosting of the air conditioner condenser.
2. The electric vehicle thermal management system of claim 1, wherein a first water tank and a first water pump are disposed in the first conduit loop.
3. The electric vehicle thermal management system of claim 1, wherein a second water tank and a second water pump are disposed in the second conduit loop.
4. The electric vehicle thermal management system of claim 1, wherein the device whose operating temperature satisfies the first temperature condition is a cabin heating device, the cabin heating device comprises a radiator and/or an electric defroster, the radiator is used for heating a cabin of the vehicle, and the electric defroster is used for defrosting glass of the cabin.
5. The thermal management system for electric vehicles of claim 4, wherein the cabin heater is further provided with a pipe, and a third check valve is provided on the pipe.
6. The electric vehicle thermal management system of claim 1, wherein the heat exchanger is a plate heat exchanger.
7. The electric vehicle thermal management system of claim 1, wherein the first conduit of the heat exchanger is provided with a pipeline, and a fourth check valve is arranged on the pipeline.
CN201710901700.1A 2017-09-28 2017-09-28 Electric vehicle heat management system Active CN110015195B (en)

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DE102022131333A1 (en) * 2022-11-28 2024-05-29 Schaeffler Technologies AG & Co. KG Thermal management system for an electrically powered motor vehicle

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