CN109649156B - Self-adaptive adjustment electric automobile cooling system and control method thereof - Google Patents
Self-adaptive adjustment electric automobile cooling system and control method thereof Download PDFInfo
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- CN109649156B CN109649156B CN201910001972.5A CN201910001972A CN109649156B CN 109649156 B CN109649156 B CN 109649156B CN 201910001972 A CN201910001972 A CN 201910001972A CN 109649156 B CN109649156 B CN 109649156B
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- 238000001816 cooling Methods 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 230000033228 biological regulation Effects 0.000 claims abstract description 19
- 230000003993 interaction Effects 0.000 claims abstract description 11
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 238000012163 sequencing technique Methods 0.000 claims description 9
- 230000002159 abnormal effect Effects 0.000 claims description 4
- 238000004378 air conditioning Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000003044 adaptive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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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
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Abstract
The invention discloses a self-adaptive control electric automobile cooling system and a control method thereof, and the self-adaptive control electric automobile cooling system comprises a human-computer interaction system, a vehicle control unit, a motor controller, a direct current converter (DC/DC) and a vehicle-mounted charger in three-in-one, a radiator, a stepless speed regulation cooling fan, a water pump capable of self-adaptive temperature speed regulation, a cooling pipeline, an air conditioner switch and an air conditioner pipeline pressure sensor, wherein the cooling pipeline connects the water pump capable of self-adaptive temperature speed regulation, the DC/DC and the vehicle-mounted charger in three-in-one, the motor controller, the motor and the radiator in series in sequence; the water pump capable of self-adapting to temperature and regulating speed, the three-in-one DC/DC and vehicle-mounted charger, the motor controller, the motor, the vehicle controller and the human-computer interaction system are communicated through a vehicle CAN network; the third one of the system is composed of a direct current converter (DC/DC), a vehicle-mounted charger and a high-voltage distribution box, a water pump controller is integrated in the water pump capable of self-adapting temperature speed regulation, and rotation speed regulation is carried out according to the working mode and the temperature information of parts.
Description
The technical field is as follows:
the invention relates to a self-adaptive adjustment electric automobile cooling system and a control method thereof, and belongs to the technical field of automobiles.
Background art:
in the running and slow charging processes of the pure electric vehicle, the motor controller, the direct current converter (DC/DC) and the vehicle-mounted charger generate a large amount of heat, so that a cooling system is required to cool the pure electric vehicle. At present, cooling modes of a power cooling system are natural cooling, air cooling and water cooling, in a traditional cooling scheme, a motor and a motor controller are both water cooled, and DC/DC and OBC are air cooled or natural cooling. In the scheme, the water pump is a constant-speed water pump without a CAN communication function, and when an automobile is powered ON, the water pump works at a constant speed with the maximum power. The cooling system and the air-conditioning cooling system share one cooling fan which is a first-gear or second-gear constant-speed fan.
Problems and disadvantages of the prior art, and the reasons for their occurrence:
this conventional cooling scheme is simple to control, but has the following disadvantages:
1) DC/DC, vehicle-mounted machine that charges adopt natural cooling or forced air cooling, and the cooling effect is relatively poor, simultaneously, after DC/DC, vehicle-mounted machine that charges, high-tension distribution box (PDU) are integrated to trinity, original cooling method can't satisfy the heat dissipation requirement.
2) When the automobile is driven, the working conditions are complex and changeable, and the heat dissipation requirement of the automobile can be changed accordingly. Under abominable operating mode, the water pump can be with the operation of highest rotational speed, but under the operating mode of low-speed or low moment of torsion, motor and controller calorific capacity are less, and the heat dissipation demand is less, and at this moment, the water pump still operates with highest rotational speed, causes the energy waste, reduces the car continuation of the journey mileage.
3) The water pump always runs at high speed, and the service life is shortened.
4) The cooling system cannot upload the state information of the cooling water pump, and when abnormal states such as faults occur, the whole vehicle and a driver cannot be supervised.
5) The cooling fan is controlled by the cooling system and the air conditioner cooling system simultaneously, is a first-gear or two-gear constant-speed fan, the gears are fixed, the corresponding rotating speed cannot be adjusted, the low-gear cannot meet the cooling requirement easily, the high-gear is energy-wasting, the high-gear cannot adapt to different working conditions of different vehicle types and the same vehicle type, and the poor cooling performance and the energy waste are caused.
The invention content is as follows:
the invention provides a self-adaptive control electric automobile cooling system and a control method thereof in order to solve the problems in the prior art.
The invention adopts the following technical scheme that the self-adaptive control electric automobile cooling system comprises a human-computer interaction system, a vehicle control unit, a motor controller, a direct current converter (DC/DC) and a vehicle-mounted charger in three, a radiator, a stepless speed regulation cooling fan, a water pump capable of self-adapting temperature speed regulation, a cooling pipeline, an air-conditioning switch and an air-conditioning pipeline pressure sensor, wherein the water pump capable of self-adapting temperature speed regulation, the DC/DC and the vehicle-mounted charger in three, the motor controller, the motor and the radiator are sequentially connected in series through the cooling pipeline; the water pump capable of self-adapting to temperature and regulating speed, the three-in-one DC/DC and vehicle-mounted charger, the motor controller, the motor, the vehicle controller and the human-computer interaction system are communicated through a vehicle CAN network; the third one of the system is composed of a direct current converter (DC/DC), a vehicle-mounted charger and a high-voltage distribution box, a water pump controller is integrated in a water pump capable of self-adapting temperature speed regulation, and the rotating speed is regulated according to a working mode and temperature information of parts; the air-conditioning pipeline pressure sensor is arranged in an air-conditioning high-pressure pipeline, the corresponding relation between the pressure value and the rotating speed of the fan is prestored in the vehicle controller, and the stepless speed-regulating radiating fan regulates the speed through a PWM signal sent by the vehicle controller.
The invention also adopts the following technical scheme: a control method of an electric automobile cooling system with self-adaptive adjustment comprises the following steps:
1) the water pump reads a vehicle state message sent by the whole vehicle controller through the CAN network and judges the vehicle working mode;
2) when the working mode of the vehicle is in a slow charging mode, the water pump runs at the lowest rotating speed npmin until the slow charging of the vehicle is finished, and the water pump stops working;
3) when the working mode of the vehicle is in a drivable mode, the water pump reads the real-time temperature of the DC/DC, the motor and the motor controller through the CAN network;
4) the water pump calculates the DC/DC temperature TDC/DC, the maximum Tmax of the motor controller temperature TMCU and the motor temperature TEM;
5) and (3) judging the gear a according to the Tmax:
dividing the temperature from low to high into P ranges, corresponding to different gears, sequentially sequencing numbers 1, 2 and 3 …, and prestoring a gear-temperature table in a water pump;
judging the temperature range of the Tmax to obtain a gear a;
6) and B, judging the gear position b according to the TEM:
dividing the temperature from low to high into P ranges, corresponding to different gears, sequentially sequencing numbers 1, 2 and 3 …, and prestoring a gear-temperature table in a water pump;
judging the temperature range of the TEM to obtain a gear b;
7) taking the maximum values cmax of the gears a and b as the required gears of the water pump;
8) dividing the rotating speed of the water pump into P gears, wherein each gear corresponds to one rotating speed, and a gear-rotating speed meter is prestored in the water pump;
9) the required gear cmax is compared with a gear-rotating speed meter to obtain the required rotating speed of the water pump, and rotating speed control is carried out;
10) in the process of reading the CAN message, if the abnormal reading phenomenon occurs, the water pump directly runs at the highest rotating speed;
11) the working state of the water pump can be displayed through the man-machine interaction system.
Further, the control logic process of the cooling system cooling fan is as follows:
1) the vehicle control unit judges the working mode of the vehicle;
2) when the working mode of the vehicle is in the slow charging mode, the cooling fan does not work;
3) when the working mode of the vehicle is in a driving mode, reading the on-off state of an air conditioner and signals of a pressure sensor of a high-pressure pipeline of the air conditioner;
4) when the air conditioner is turned on, dividing the pressure value into M ranges from low to high, sequentially sequencing numbers 1, 2 and 3 … corresponding to different gears d, and when the air conditioner is turned off, setting the gear as 0 and prestoring a gear-pressure gauge in the whole vehicle controller;
5) and (5) judging a gear d:
6) the rotating speed of the cooling fan is a function of a gear d and a water pump required gear cmax, and the relationship between the rotating speed of the fan, the gear d and the water pump required gear is prestored in the vehicle controller in a table form;
7) the vehicle control unit obtains the rotating speed of the cooling fan in a table look-up mode;
8) and the vehicle control unit sends a PWM signal to the cooling fan to adjust the rotating speed of the cooling fan.
The invention has the following beneficial effects:
1) the water pump that cooling system used has CAN communication function and self-adaptation temperature speed governing function, need not extra controller and temperature sensor, practices thrift the hardware cost, does benefit to different motorcycle types simultaneously and uses, improves system commonality, and the platformization.
2) The water pump CAN send information such as rotating speed, working state and the like to the CAN network through the CAN network, and the whole vehicle and a driver CAN conveniently monitor.
3) The cooling system can adjust the rotating speed of the water pump according to different working modes and different running conditions of the automobile, reduce the energy consumption of the water pump and improve the endurance mileage;
4) the cooling system provided by the invention prevents the water pump from always running at a high speed, and prolongs the service life of the water pump.
5) The cooling fan of the cooling system can adjust the rotating speed according to different working modes and different running working conditions of the automobile, so that the energy consumption of the fan is reduced, the endurance mileage is improved, and the service life of the fan is prolonged.
Description of the drawings:
FIG. 1 is a schematic diagram of an adaptive control electric vehicle cooling system according to the present invention.
FIG. 2 is a schematic diagram of a control method of the electric vehicle cooling system with adaptive regulation according to the present invention.
The specific implementation mode is as follows:
the invention will be further described with reference to the accompanying drawings.
The self-adaptive control electric automobile cooling system comprises a man-machine interaction system, a finished automobile controller, a motor controller, a direct current converter (DC/DC) in three, a vehicle-mounted charger, a radiator, a stepless speed regulation cooling fan, a water pump capable of self-adaptively regulating temperature, an air conditioner switch and an air conditioner pipeline pressure sensor. Wherein, the cooling pipeline connects the water pump capable of self-adapting temperature speed regulation, the DC/DC in three-in-one and the vehicle-mounted charger, the motor controller, the motor and the radiator in series in sequence; the water pump capable of self-adapting to temperature and speed regulation, the three-in-one DC/DC and vehicle-mounted charger, the motor controller, the motor, the vehicle controller and the human-computer interaction system are communicated through a vehicle CAN network. The system comprises a direct current converter (DC/DC), a vehicle-mounted charger (OBC) and a high-voltage distribution box, wherein the direct current converter (DC/DC) and the vehicle-mounted charger need water cooling; the driving mode in the system is the state of the Star gear of the vehicle; the water pump in the system CAN carry out CAN communication so as to judge whether the automobile is in a running mode or a slow charging mode, and CAN read the real-time temperature of the motor controller, the motor, the DC/DC in three and the vehicle-mounted charger through a CAN network; in the system, an air conditioner pressure sensor is arranged in an air conditioner high-pressure pipeline, and the corresponding relation between the pressure value and the rotating speed of a fan is prestored in a vehicle control unit. In the system, the cooling fan can regulate the speed through a PWM signal sent by the vehicle control unit.
The invention discloses a control method of an electric automobile cooling system with self-adaptive adjustment, which comprises the following steps:
1) the water pump reads a vehicle state message sent by the whole vehicle controller through the CAN network and judges the vehicle working mode;
2) when the working mode of the vehicle is in a slow charging mode, the water pump runs at the lowest rotating speed npmin until the slow charging of the vehicle is finished, and the water pump stops working;
3) when the working mode of the vehicle is in a drivable mode, the water pump reads the real-time temperature of the DC/DC, the motor and the motor controller through the CAN network;
4) the water pump calculates the DC/DC temperature TDC/DC, the maximum Tmax of the motor controller temperature TMCU and the motor temperature TEM;
5) and (3) judging the gear a according to the Tmax:
dividing the temperature from low to high into P ranges, corresponding to different gears, sequentially sequencing numbers 1, 2 and 3 …, and prestoring a gear-temperature table in a water pump;
and secondly, judging the temperature range of the Tmax to obtain a gear a.
6) And B, judging the gear position b according to the TEM:
dividing the temperature from low to high into P ranges, corresponding to different gears, sequentially sequencing numbers 1, 2 and 3 …, and prestoring a gear-temperature table in a water pump;
and secondly, judging the temperature range of the TEM to obtain a gear b.
7) Taking the maximum values cmax of the gears a and b as the required gears of the water pump;
8) dividing the rotating speed of the water pump into P gears, wherein each gear corresponds to one rotating speed, and a gear-rotating speed meter is prestored in the water pump;
9) and comparing the required gear cmax with a gear-tachometer to obtain the required rotating speed of the water pump, and controlling the rotating speed.
10) In the process of reading the CAN message, if the abnormal reading phenomenon occurs, the water pump directly runs at the highest rotating speed;
11) the working state of the water pump can be displayed through the man-machine interaction system.
The control logic of the cooling fan of the cooling system is shown in fig. 2, and the process is as follows:
1) the vehicle control unit judges the working mode of the vehicle;
2) when the working mode of the vehicle is in the slow charging mode, the cooling fan does not work;
3) when the working mode of the vehicle is in a driving mode, reading the on-off state of an air conditioner and signals of a pressure sensor of a high-pressure pipeline of the air conditioner;
4) when the air conditioner is turned on, dividing the pressure value into M ranges from low to high, sequentially sequencing numbers 1, 2 and 3 … corresponding to different gears d, and when the air conditioner is turned off, setting the gear as 0 and prestoring a gear-pressure gauge in the whole vehicle controller;
5) and (5) judging a gear d:
6) the rotating speed of the cooling fan is a function of a gear d and a water pump required gear cmax, and the relationship between the rotating speed of the fan, the gear d and the water pump required gear is prestored in the vehicle controller in a table form;
7) the vehicle control unit obtains the rotating speed of the cooling fan in a table look-up mode;
8) and the vehicle control unit sends a PWM signal to the cooling fan to adjust the rotating speed of the cooling fan.
The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.
Claims (1)
1. A control method of an electric automobile cooling system with self-adaptive adjustment comprises a human-computer interaction system, a whole automobile controller, a motor controller, a DC/DC converter and a vehicle-mounted charger in three, a radiator, a stepless speed regulation cooling fan, a water pump with self-adaptive temperature speed regulation, a cooling pipeline, an air conditioner switch and an air conditioner pipeline pressure sensor, wherein the water pump with self-adaptive temperature speed regulation, the DC/DC converter and the vehicle-mounted charger in three, the motor controller, the motor and the radiator are sequentially connected in series through the cooling pipeline; the water pump capable of self-adapting to temperature and regulating speed, the three-in-one DC/DC and vehicle-mounted charger, the motor controller, the motor, the vehicle controller and the human-computer interaction system are communicated through a vehicle CAN network; the third one of the systems is composed of a direct current converter vehicle-mounted charger and a high-voltage distribution box, a water pump controller is integrated in a water pump capable of self-adapting to temperature speed regulation, and rotating speed regulation is carried out according to a working mode and temperature information of parts; air conditioner pipeline pressure sensor installs in air conditioner high pressure pipeline, and the corresponding relation of its pressure value and fan rotational speed prestores in vehicle control unit, and stepless speed regulation radiator fan carries out the speed governing through the PWM signal that vehicle control unit sent, its characterized in that: the process is as follows:
1) the water pump reads a vehicle state message sent by the whole vehicle controller through the CAN network and judges the vehicle working mode;
2) when the working mode of the vehicle is in a slow charging mode, the water pump runs at the lowest rotating speed npmin until the slow charging of the vehicle is finished, and the water pump stops working;
3) when the working mode of the vehicle is in a drivable mode, the water pump reads the real-time temperature of the DC/DC, the motor and the motor controller through the CAN network;
4) the water pump calculates the DC/DC temperature TDC/DC, the maximum Tmax of the motor controller temperature TMCU and the motor temperature TEM;
5) and (3) judging the gear a according to the Tmax:
dividing the temperature from low to high into P ranges, corresponding to different gears, sequentially sequencing numbers 1, 2 and 3 …, and prestoring a gear-temperature table in a water pump;
judging the temperature range of the Tmax to obtain a gear a;
6) and B, judging the gear position b according to the TEM:
dividing the temperature from low to high into P ranges, corresponding to different gears, sequentially sequencing numbers 1, 2 and 3 …, and prestoring a gear-temperature table in a water pump;
judging the temperature range of the TEM to obtain a gear b;
7) taking the maximum values cmax of the gears a and b as the required gears of the water pump;
8) dividing the rotating speed of the water pump into P gears, wherein each gear corresponds to one rotating speed, and a gear-rotating speed meter is prestored in the water pump;
9) the required gear cmax is compared with a gear-rotating speed meter to obtain the required rotating speed of the water pump, and rotating speed control is carried out;
10) in the process of reading the CAN message, if the abnormal reading phenomenon occurs, the water pump directly runs at the highest rotating speed;
11) the working state of the water pump can be displayed through a man-machine interaction system;
the control logic process of the cooling system cooling fan is as follows:
1) the vehicle control unit judges the working mode of the vehicle;
2) when the working mode of the vehicle is in the slow charging mode, the cooling fan does not work;
3) when the working mode of the vehicle is in a driving mode, reading the on-off state of an air conditioner and signals of a pressure sensor of a high-pressure pipeline of the air conditioner;
4) when the air conditioner is turned on, dividing the pressure value into M ranges from low to high, sequentially sequencing numbers 1, 2 and 3 … corresponding to different gears d, and when the air conditioner is turned off, setting the gear as 0 and prestoring a gear-pressure gauge in the whole vehicle controller;
5) and (5) judging a gear d:
6) the rotating speed of the cooling fan is a function of a gear d and a water pump required gear cmax, and the relationship between the rotating speed of the fan, the gear d and the water pump required gear is prestored in the vehicle controller in a table form;
7) the vehicle control unit obtains the rotating speed of the cooling fan in a table look-up mode;
8) and the vehicle control unit sends a PWM signal to the cooling fan to adjust the rotating speed of the cooling fan.
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| CN112895959A (en) * | 2019-12-04 | 2021-06-04 | 观致汽车有限公司 | Direct current charging control system and control method for electric vehicle |
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| CN114274763B (en) * | 2020-09-27 | 2023-08-22 | 北京新能源汽车股份有限公司 | Control method and device for in-vehicle environment |
| CN112283114A (en) * | 2020-11-30 | 2021-01-29 | 南京恒天领锐汽车有限公司 | Cooling system and method for air compressor |
| CN114576148B (en) * | 2020-11-30 | 2024-01-30 | 华为技术有限公司 | Liquid cooling system, control method and control device applied to liquid cooling system and vehicle |
| CN112498091B (en) * | 2020-12-09 | 2023-02-28 | 庆铃汽车（集团）有限公司 | Pure electric vehicle control method, terminal, medium and vehicle based on NEDC working condition |
| CN112549904B (en) * | 2020-12-23 | 2022-09-30 | 摩登汽车(盐城)有限公司 | Method and system for controlling rotating speed of condensing fan of electric automobile |
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Denomination of invention: An Adaptive Regulating Cooling System for Electric Vehicles and Its Control Method Granted publication date: 20220218 Pledgee: China Construction Bank Corporation Nanjing Lishui sub branch Pledgor: NANJING GOLDEN DRAGON BUS Co.,Ltd. Registration number: Y2024980017170 |