CN112895844A - Electric automobile waste heat recycling control system and method - Google Patents
Electric automobile waste heat recycling control system and method Download PDFInfo
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- CN112895844A CN112895844A CN202110193829.8A CN202110193829A CN112895844A CN 112895844 A CN112895844 A CN 112895844A CN 202110193829 A CN202110193829 A CN 202110193829A CN 112895844 A CN112895844 A CN 112895844A
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- motor
- control system
- cabin
- waste heat
- heat
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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
- B60H1/14—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit
- B60H1/143—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant otherwise than from cooling liquid of the plant, e.g. heat from the grease oil, the brakes, the transmission unit the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K11/00—Arrangement in connection with cooling of propulsion units
- B60K11/02—Arrangement in connection with cooling of propulsion units with liquid cooling
- B60K11/04—Arrangement or mounting of radiators, radiator shutters, or radiator blinds
Abstract
The invention discloses an electric automobile waste heat recycling control system, which comprises a vehicle control unit, a crew cabin temperature control system and a motor temperature control system, wherein the vehicle control unit comprises: the crew cabin temperature control system is controlled by the vehicle control unit, is used for supplying heat to the crew cabin and the motor temperature control system is controlled by the vehicle control unit, and is used for supplying heat to the crew cabin temperature control system by utilizing the waste heat of the motor and dissipating heat of the motor; the cabin temperature control system is connected with the motor temperature control system through a switch valve for realizing heat transfer between the cabin temperature control system and the motor temperature control system, and the switch valve is controlled by the vehicle control unit. The invention compares the heat supply quantity required by the crew cabin with the waste heat of the motor, accurately and fully utilizes the waste heat of the motor according to the comparison result, improves the cruising ability of the electric automobile in winter, considers the heat dissipation requirement existing when the waste heat of the motor is still remained after being utilized, and ensures the safety of the whole automobile system. The invention also discloses a waste heat recycling control method of the electric automobile.
Description
Technical Field
The invention relates to the technical field of automobile energy control, in particular to a waste heat recycling control system and method for an electric automobile.
Background
The electric automobile is a vehicle which takes a vehicle-mounted power supply as power and drives wheels by a motor to run, meets various requirements of road traffic and safety regulations, has a wide prospect due to smaller influence on the environment compared with the traditional automobile, and has the working principle of driving the automobile to run by a storage battery-current-power regulator-motor-power transmission system.
The electric automobile does not have the engine of traditional car, and the source of heating in the electric automobile cabin of taking advantage of high-pressure hot-water heating PTC or high-pressure air PTC in the day ahead is given first place to the battery power consumption great winter, and after the motor operation a period of time, motor temperature rises, can bring adverse effect to the motor operation, need consume the heat that the motor produced through the water pipe way, has caused the waste of the energy, has weakened the ability of cruising of electric automobile in winter greatly.
For example, chinese patent document CN104191933B discloses a "heating management system for hybrid electric vehicle", which includes an engine heating large cycle and an electric heating small cycle; the engine heating large circulation is used for heating a water path to sequentially pass through a circulating water pump, a thermostat and an inlet of a three-way valve B of the engine, an outlet of the three-way valve C, a water passing PTC heater and a cab heating unit to form a circulating loop; the electric heating small circulation is used for heating a water path to sequentially pass through the PTC water pump and the inlet of the three-way valve A, and the outlet of the three-way valve C, the overflow PTC heater and the cab heating unit form a circulation loop. The defects of the patent include that the waste heat of the motor cannot be accurately and fully utilized, and the heat dissipation requirement existing when the motor waste heat still remains after being utilized is not considered, so that the safety of the whole vehicle system is greatly reduced.
Disclosure of Invention
The invention mainly solves the technical problems that the original electric automobile can not accurately and fully utilize the waste heat of the motor, and the heat dissipation requirement existing when the waste heat of the motor is still remained after being utilized is not considered, so that the safety of the whole automobile system is greatly reduced; the system and the method for controlling the waste heat recycling of the electric automobile compare the heat supply quantity required by the crew cabin with the waste heat of the motor, accurately and fully utilize the waste heat of the motor according to a comparison result, improve the cruising ability of the electric automobile in winter, consider the heat dissipation requirement existing when the waste heat of the motor is still remained after being utilized, and ensure the safety of the whole automobile system.
The technical problem of the invention is mainly solved by the following technical scheme: the invention discloses a waste heat recycling control system of an electric automobile, which comprises a vehicle control unit, a cabin temperature control system and a motor temperature control system, wherein the vehicle control unit comprises:
the temperature control system of the crew cabin is controlled by the vehicle control unit and is used for supplying heat to the crew cabin;
the motor temperature control system is controlled by the vehicle control unit and is used for supplying heat to the cabin temperature control system by utilizing the waste heat of the motor and dissipating heat of the motor;
the cabin temperature control system is connected with the motor temperature control system through a switch valve for realizing heat transfer between the cabin temperature control system and the motor temperature control system, and the switch valve is controlled by the vehicle control unit.
The invention compares the heat supply quantity required by the crew cabin with the waste heat of the motor, accurately and fully utilizes the waste heat of the motor according to the comparison result, improves the cruising ability of the electric automobile in winter, considers the heat dissipation requirement existing when the waste heat of the motor is still remained after being utilized, and ensures the safety of the whole automobile system.
Preferably, the cabin temperature control system comprises a preheating module and a heating module, one end of the preheating module is connected with the first output end of the switch valve through a pipeline, the other end of the preheating module is connected with the heating module, the preheating module is provided with an air inlet, and the heating module is provided with an air outlet.
Preferably, the motor temperature control system comprises a battery, a motor, an electric water pump and a radiator, wherein the motor is respectively connected with the battery and the electric water pump, the electric water pump is connected with the input end of the switch valve, and the second output end of the switch valve is connected with the radiator.
Preferably, the switch valve is a six-way valve.
The invention discloses a waste heat recycling control method for an electric automobile, which comprises the following steps: s1, acquiring the current temperature of the crew cabin, judging the level of the current temperature of the crew cabin in the class classification of the temperature class of the crew cabin, if the current temperature of the crew cabin is in the first level, entering the step S2, if the current temperature of the crew cabin is in the second level, entering the step S3, and if the current temperature of the crew cabin is in the third level, entering the step S4;
s2, opening a second output end of the switch valve, and closing a first output end of the switch valve;
s3, acquiring the heat supply quantity required by the crew cabin, opening a first output end and a second output end of the switch valve when the heat supply quantity of the crew cabin is smaller than the waste heat quantity of the motor, and opening the first output end of the switch valve and closing the second output end of the switch valve when the heat supply quantity of the crew cabin is equal to the waste heat quantity of the motor;
s4, obtaining the heat supply quantity needed by the crew cabin, obtaining the difference between the heat supply quantity needed by the crew cabin and the residual heat quantity of the motor, opening the first output end of the switch valve, closing the second output end of the switch valve, and controlling the heater to work and heat.
When the current temperature of the crew cabin is in the first level, the crew cabin does not need external heat supply stopping, so that the second output end of the six-way valve is opened, the first output end of the six-way valve is closed, namely when the motor waste heat is not utilized, the motor waste heat can still be completely dissipated, and the safety of the whole vehicle system is ensured.
When the current temperature of the crew cabin is in the second level, when the heat supply of the crew cabin is less than the waste heat of the motor, the first output end and the second output end of the six-way valve are opened, when the heat supply of the crew cabin is equal to the waste heat of the motor, the first output end of the six-way valve is opened, the second output end of the six-way valve is closed, namely the waste heat of the motor is supplied to meet the heating requirement of the crew cabin, and when the waste heat of the motor is still remained, the redundant waste heat of the motor is radiated through the radiator, so that the safety of the whole vehicle system is ensured.
When the current temperature of the crew cabin is in the third level, the first output end of the six-way valve is opened, the second output end of the six-way valve is closed, and the heater is controlled to work and heat, namely, the waste heat of the motor cannot meet the heating requirement of the crew cabin, and the temperature of the air after passing through the preheating module cannot meet the standard temperature of the crew cabin, so that the air heated by the preheating module needs to be continuously heated by the heater to reach the standard temperature of the crew cabin.
The waste heat of the motor can be accurately and fully utilized, the cruising ability of the electric automobile in winter is improved, the heat dissipation requirement existing when the motor waste heat is still remained after being utilized is considered, and the safety of the whole automobile system is guaranteed.
Preferably, the cabin temperature class classification includes:
in the first stage, the current temperature of a cabin is more than or equal to 25 ℃;
in the second stage, the current temperature of the cabin is less than 25 ℃ and more than or equal to 15 ℃;
and in the third stage, the current temperature of the cabin is less than 15 ℃.
Preferably, the heating load required by the crew cabin is obtained by the following formula:
Q＝c×m×(t-t＇)
wherein c is the specific heat capacity of water, m is the mass of water which can be stored in the preheating module, t is the standard temperature of the cabin, and t' is the current temperature of the cabin.
Preferably, the residual heat amount of the motor is obtained by the following formula:
Q＇＝P÷η×X
wherein, P is the rated power of the motor, eta is the efficiency of the motor, and X is the load factor of the motor.
The invention has the beneficial effects that: the heat supply quantity required by the crew cabin is compared with the waste heat of the motor, the waste heat of the motor is accurately and fully utilized according to the comparison result, the cruising ability of the electric automobile in winter is improved, the heat dissipation requirement existing when the waste heat of the motor is still remained after being utilized is considered, and the safety of the whole automobile system is guaranteed.
Drawings
FIG. 1 is a schematic diagram of a system configuration according to the present invention.
In the figure, the device comprises a radiator 1, a six-way valve 2, a six-way valve 3, an electric water pump 4, a motor 5, a cabin 6, a heating module 7, a preheating module 8 and a battery.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): in the present embodiment, as shown in fig. 1, the vehicle control unit includes a vehicle control unit, a cabin 5 temperature control system, and a motor temperature control system, where: temperature control of a cabin, namely an electric vehicle waste heat recovery and utilization control system of an embodiment of an electric vehicle waste heat recovery and utilization control system, is controlled by a vehicle control unit and is used for supplying heat to the cabin; the motor temperature control system is controlled by the vehicle control unit and is used for supplying heat to the cabin temperature control system by utilizing the waste heat of the motor and dissipating heat of the motor; the cabin temperature control system is connected with the motor temperature control system through a switch valve for realizing heat transfer between the cabin temperature control system and the motor temperature control system, the switch valve is controlled by the vehicle control unit, and the switch valve is a six-way valve 2. The crew cabin temperature control system comprises a preheating module 7 and a heating module 6, one end of the preheating module is connected with the first output end of the six-way valve through a pipeline, the other end of the preheating module is connected with the heating module, an air inlet is formed in the preheating module, and an air outlet is formed in the heating module. The motor temperature control system comprises a battery 8, a motor 4, an electric water pump 3 and a radiator 1, wherein the motor is respectively connected with the battery and the electric water pump, the electric water pump is connected with the input end of the six-way valve, and the second output end of the six-way valve is connected with the radiator. The battery supplies power for all electric equipment in the electric automobile.
The method for controlling the waste heat recovery of the electric automobile comprises the following steps:
s1, acquiring the current temperature of the crew cabin, judging the level of the current temperature of the crew cabin in the class classification of the temperature class of the crew cabin, if the current temperature of the crew cabin is in the first level, entering the step S2, if the current temperature of the crew cabin is in the second level, entering the step S3, and if the current temperature of the crew cabin is in the third level, entering the step S4;
wherein, the first stage refers to that the current temperature of the crew cabin is more than or equal to 25 ℃; the second stage refers to that the current temperature of the crew cabin is less than 25 ℃ and more than or equal to 15 ℃; the third level means that the current temperature of the crew cabin is less than 15 ℃;
s2, the second output end of the six-way valve is opened, and the first output end of the six-way valve is closed;
s3, acquiring the heat supply required by the crew cabin, when the heat supply of the crew cabin is smaller than the residual heat of the motor, starting a first output end and a second output end of the six-way valve, and when the heat supply of the crew cabin is equal to the residual heat of the motor, starting the first output end of the six-way valve and closing the second output end of the six-way valve;
s4, obtaining the heat supply quantity needed by the crew cabin, obtaining the difference between the heat supply quantity needed by the crew cabin and the residual heat quantity of the motor, starting the first output end of the six-way valve, closing the second output end of the six-way valve, and controlling the heater to work and heat.
The heat supply amount required by the crew cabin is obtained through the following formula:
Q＝c×m×(t-t＇)
wherein c is the specific heat capacity of water, m is the mass of water which can be stored in the preheating module, t is the standard temperature of the cabin, and t' is the current temperature of the cabin.
The waste heat quantity of the motor is obtained through the following formula:
Q＇＝P÷η×X
wherein, P is the rated power of the motor, eta is the efficiency of the motor, and X is the load factor of the motor.
When the current temperature of the crew cabin is more than or equal to 25 ℃, the crew cabin does not need external heat supply stopping, so that the second output end of the six-way valve is opened, the first output end of the six-way valve is closed, namely when the motor waste heat is not utilized, the motor waste heat can still be completely dissipated, and the safety of the whole vehicle system is ensured.
The current temperature of the crew cabin is less than 25 ℃ and more than or equal to 15 ℃, when the heat supply of the crew cabin is less than the waste heat of the motor, the first output end and the second output end of the six-way valve are opened, when the heat supply of the crew cabin is equal to the waste heat of the motor, the first output end of the six-way valve is opened, the second output end of the six-way valve is closed, namely the waste heat of the motor is supplied to meet the heating requirement of the crew cabin, when the waste heat of the motor is still remained, the redundant waste heat of the motor is dissipated through the radiator, and the safety of the whole vehicle system is ensured.
When the current temperature of the crew cabin is less than 15 ℃, the first output end of the six-way valve is opened, the second output end of the six-way valve is closed, and the heater is controlled to work and heat, namely, the waste heat of the motor cannot meet the heating requirement of the crew cabin, and the temperature of the air after passing through the preheating module cannot meet the standard temperature of the crew cabin, so that the air heated by the preheating module needs to be continuously heated by the heater to reach the standard temperature of the crew cabin.
The embodiment can accurately and fully utilize the waste heat of the motor, improves the cruising ability of the electric automobile in winter, considers the heat dissipation requirement of the motor when the waste heat is still remained after the motor is utilized, and ensures the safety of the whole automobile system.
Claims (8)
1. The utility model provides an electric automobile waste heat recovery utilizes control system, its characterized in that, includes vehicle control unit, crew cab temperature control system and motor temperature control system, wherein:
the temperature control system of the crew cabin is controlled by the vehicle control unit and is used for supplying heat to the crew cabin;
the motor temperature control system is controlled by the vehicle control unit and is used for supplying heat to the cabin temperature control system by utilizing the waste heat of the motor and dissipating heat of the motor;
the cabin temperature control system is connected with the motor temperature control system through a switch valve for realizing heat transfer between the cabin temperature control system and the motor temperature control system, and the switch valve is controlled by the vehicle control unit.
2. The waste heat recycling control system of claim 1, wherein the cabin temperature control system comprises a preheating module and a heating module, one end of the preheating module is connected to the first output end of the switch valve through a pipeline, the other end of the preheating module is connected to the heating module, the preheating module is provided with an air inlet, and the heating module is provided with an air outlet.
3. The waste heat recycling control system of claim 1, wherein the motor temperature control system comprises a battery, a motor, an electric water pump and a radiator, the motor is connected to the battery and the electric water pump, the electric water pump is connected to an input end of a switch valve, and a second output end of the switch valve is connected to the radiator.
4. The electric vehicle waste heat recycling control system as claimed in claim 1, 2 or 3, wherein the switch valve is a six-way valve.
5. The electric vehicle waste heat recycling control method is applicable to the electric vehicle waste heat recycling control system according to claim 4, and is characterized by comprising the following steps of:
s1, acquiring the current temperature of the crew cabin, judging the level of the current temperature of the crew cabin in the class classification of the temperature class of the crew cabin, if the current temperature of the crew cabin is in the first level, entering the step S2, if the current temperature of the crew cabin is in the second level, entering the step S3, and if the current temperature of the crew cabin is in the third level, entering the step S4;
s2, opening a second output end of the switch valve, and closing a first output end of the switch valve;
s3, acquiring the heat supply quantity required by the crew cabin, opening a first output end and a second output end of the switch valve when the heat supply quantity of the crew cabin is smaller than the waste heat quantity of the motor, and opening the first output end of the switch valve and closing the second output end of the switch valve when the heat supply quantity of the crew cabin is equal to the waste heat quantity of the motor;
s4, obtaining the heat supply quantity needed by the crew cabin, obtaining the difference between the heat supply quantity needed by the crew cabin and the residual heat quantity of the motor, opening the first output end of the switch valve, closing the second output end of the switch valve, and controlling the heater to work and heat.
6. The electric vehicle waste heat recycling control method according to claim 5, wherein the cabin temperature class classification comprises:
in the first stage, the current temperature of a cabin is more than or equal to 25 ℃;
in the second stage, the current temperature of the cabin is less than 25 ℃ and more than or equal to 15 ℃;
and in the third stage, the current temperature of the cabin is less than 15 ℃.
7. The method for controlling waste heat recovery of the electric vehicle according to claim 5, wherein the heat supply amount required by the crew cabin is obtained by the following formula:
Q＝c×m×(t-t＇)
wherein c is the specific heat capacity of water, m is the mass of water which can be stored in the preheating module, t is the standard temperature of the cabin, and t' is the current temperature of the cabin.
8. The electric vehicle waste heat recycling control method according to claim 5, wherein the waste heat amount of the motor is obtained by the following formula:
Q＇＝P÷η×X
wherein, P is the rated power of the motor, eta is the efficiency of the motor, and X is the load factor of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110193829.8A CN112895844B (en) | 2021-02-20 | 2021-02-20 | Electric automobile waste heat recycling control system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110193829.8A CN112895844B (en) | 2021-02-20 | 2021-02-20 | Electric automobile waste heat recycling control system and method |
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| CN112895844A true CN112895844A (en) | 2021-06-04 |
| CN112895844B CN112895844B (en) | 2022-12-02 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102692095A (en) * | 2011-03-23 | 2012-09-26 | 现代自动车株式会社 | Heat pump system for vehicle |
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| CN107539065A (en) * | 2017-08-31 | 2018-01-05 | 上海思致汽车工程技术有限公司 | A kind of heat regulation control system and method for electric automobile |
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| CN209381737U (en) * | 2018-09-14 | 2019-09-13 | 沈阳派普工业有限公司 | A kind of residual heat reutilizing system |
| CN110395089A (en) * | 2018-04-25 | 2019-11-01 | 福特全球技术公司 | The system and method for power electronic equipment and motor waste heat combined heated passenger compartment |
| CN111114240A (en) * | 2020-01-07 | 2020-05-08 | 风氢扬科技(杭州)有限公司 | Waste heat utilization control method and device and waste heat utilization system |
| CN112060865A (en) * | 2019-06-10 | 2020-12-11 | 宁德时代新能源科技股份有限公司 | Thermal management system of electric automobile |
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2021
- 2021-02-20 CN CN202110193829.8A patent/CN112895844B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102692095A (en) * | 2011-03-23 | 2012-09-26 | 现代自动车株式会社 | Heat pump system for vehicle |
| CN105916711A (en) * | 2014-01-14 | 2016-08-31 | 株式会社电装 | Vehicular heat management system |
| CN107539065A (en) * | 2017-08-31 | 2018-01-05 | 上海思致汽车工程技术有限公司 | A kind of heat regulation control system and method for electric automobile |
| CN110395089A (en) * | 2018-04-25 | 2019-11-01 | 福特全球技术公司 | The system and method for power electronic equipment and motor waste heat combined heated passenger compartment |
| CN109017272A (en) * | 2018-08-20 | 2018-12-18 | 中国第汽车股份有限公司 | Utilize the heat management system of the electric car of vehicle waste heat |
| CN209381737U (en) * | 2018-09-14 | 2019-09-13 | 沈阳派普工业有限公司 | A kind of residual heat reutilizing system |
| CN112060865A (en) * | 2019-06-10 | 2020-12-11 | 宁德时代新能源科技股份有限公司 | Thermal management system of electric automobile |
| CN111114240A (en) * | 2020-01-07 | 2020-05-08 | 风氢扬科技(杭州)有限公司 | Waste heat utilization control method and device and waste heat utilization system |
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