CN113135089A - Electric vehicle cooling system and control method thereof - Google Patents
Electric vehicle cooling system and control method thereof Download PDFInfo
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- CN113135089A CN113135089A CN202110555320.3A CN202110555320A CN113135089A CN 113135089 A CN113135089 A CN 113135089A CN 202110555320 A CN202110555320 A CN 202110555320A CN 113135089 A CN113135089 A CN 113135089A
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- cooling system
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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
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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
- B60K11/06—Arrangement in connection with cooling of propulsion units with air cooling
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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
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
- B60K2001/005—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric storage means
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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
- B60K1/00—Arrangement or mounting of electrical propulsion units
- B60K2001/003—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units
- B60K2001/006—Arrangement or mounting of electrical propulsion units with means for cooling the electrical propulsion units the electric motors
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses an electric vehicle cooling system and a control method. The electric vehicle cooling system consists of a motor cooling system and a battery cooling system, wherein the motor cooling system consists of a liquid storage tank, a radiator, an electric fan, a water temperature sensor, an electric water pump, a motor, a controller and a DCDC (direct current) and is connected through a cooling pipeline, and the water temperature sensor is used for collecting temperature signals and then transmitting the temperature signals to the controller; the battery cooling system consists of an electric water pump, a PTC, a heat exchanger, a CHILLER, the electric water pump, a battery, a water temperature sensor and a liquid storage tank, and is connected through a cooling pipeline, and the water temperature sensor collects temperature signals and then transmits the temperature signals to the controller. The cooling system control method of the electric vehicle is classified into a motor cooling control method and a battery cooling control method. The cooling system and the control method of the electric vehicle can simplify the cooling system and reduce the power consumption of the parts of the cooling system; the control method effectively avoids frequent opening and closing of the parts of the cooling system and improves the NVH of the system.
Description
Technical Field
The invention belongs to the technical field of electric automobiles, and particularly relates to an electric automobile cooling system and a control method thereof.
Background
At present, electric vehicles are developed rapidly in the automobile industry, and how to simplify a cooling system to reduce cost and arrangement difficulty and how to accurately control components of the cooling system to reduce power consumption in the development process of the electric vehicles are key points and difficulties in the development of the cooling system of the electric vehicles at present.
The prior art discloses an electric vehicle cooling system and a control method thereof, the electric vehicle cooling system mainly comprises a DC/DC cooling water jacket, an air conditioner controller cooling water jacket, a motor controller cooling water jacket, a driving motor cooling water jacket, a radiator and an electric water pump which are sequentially connected together and communicated by a cooling pipeline, a cooling liquid temperature sensor is arranged between the outlet of the radiator and the inlet of the electric water pump, an electric fan for enhancing heat radiation is also arranged on a heat radiation device, the electric fan is electrically connected with a main control unit, and the cooling liquid temperature sensor is electrically connected with the main control unit; and a control method of controlling the cooling system of the electric vehicle. The system with the structure and the control method can ensure good heat dissipation of main components on the electric automobile and ensure driving safety. However, this electric vehicle cooling system is mainly performed for a motor cooling system, and battery cooling and a control method thereof are not disclosed.
Disclosure of Invention
The invention aims to provide an electric vehicle cooling system and a control method of the electric vehicle cooling system, so as to solve the problems of simplifying the cooling system and reducing the power consumption of parts of the cooling system, effectively avoid the frequent opening and closing of the parts of the cooling system and improve the NVH of the system; cooling/heating can be realized according to the requirement, and the influence of the environmental temperature is considered, so that accurate control is realized; the method has the advantages of optimizing energy consumption, improving NVH and the like.
The purpose of the invention is realized by the following technical scheme:
a cooling system of an electric vehicle is composed of a controller, a motor cooling system and a battery cooling system;
the motor cooling system comprises a liquid storage tank I1, a radiator 2, an electric fan 3, a water temperature sensor I4, an electric water pump I5, a motor and controller 6 and a DCDC7 which are connected through a cooling pipeline, wherein cooling liquid is arranged in the middle of the pipeline;
the battery cooling system consists of an electric water pump II 8, a PTC9, a heat exchanger 10, a CHILLER11, an electric water pump III 12, a battery 13, a water temperature sensor II 14 and a liquid storage tank II 15 which are connected through cooling pipelines, and cooling liquid is arranged in the middle of the pipelines;
the liquid storage tank I1 and the liquid storage tank II 15 are used for compensating cooling liquid and exhausting gas; the radiator 2 is used for exchanging heat into air; the electric fan 3 is used for taking away the heat of the radiator 2; the water temperature sensor I4 and the water temperature sensor II 14 are used for collecting temperature signals and then transmitting the temperature signals to the controller; the electric water pump I5, the electric water pump II 8 and the electric water pump III 12 are power sources for cooling liquid circulation.
The control method of the electric vehicle cooling system comprises motor cooling control and comprises the following steps: the body temperature signals of the motor and controller 6 and the DCDC7 are transmitted to the controller, the temperature signal acquired by the water temperature sensor I4 is transmitted to the controller, and the controller judges which mode of the motor cooling system is closed, the motor cooling mode I and the motor cooling mode II according to the related signal and whether the controller is powered on, and the 3 modes can be mutually converted.
Further, when the motor cooling system is closed, the controller is powered off; when the motor is in a cooling mode I, the controller is powered on, and the electric water pump I5 is operated according to the default rotating speed; and in the motor cooling mode II, when the body temperature of the motor and the controller 6 is not less than T1, or the body temperature of DCDC7 is not less than T2, or the temperature signal of the water temperature sensor I4 is not less than T3, the motor cooling mode II is entered, and the electric water pump I5 is linearly controlled according to each temperature value.
Furthermore, when the body temperature of the motor and controller 6 is less than or equal to T4, or the body temperature of DCDC7 is less than or equal to T5, or the temperature signal of the water temperature sensor I4 is less than or equal to T6, the motor cooling mode II is exited, and the motor cooling mode I is entered; when the temperature of the water temperature sensor I4 is not less than T7, the electric fan 3 is started, the rotating speed of the electric fan is linearly controlled according to the temperature signal of the water temperature sensor I4, and when the temperature signal of the water temperature sensor I4 is not more than T8, the electric fan 3 stops running.
The control method of the electric vehicle cooling system further comprises battery cooling control, and comprises the following steps: the controller collects the temperature of the battery body, the ambient temperature and the temperature of the cooling liquid, and judges which of a battery cooling system closing mode, a battery heating mode, a battery self-circulation mode and a battery cooling mode the system is in according to the related signals, and the 4 modes can be mutually converted.
Further, when the battery cooling system is shut down, the controller is powered down; the controller is electrified, when the environmental temperature is less than or equal to T9 and the temperature of the battery body is less than or equal to T10, the battery heating mode is started, the electric water pump runs at full speed, the rotating speed of the electric water pump III 12 is linearly controlled according to the temperature of the battery body, and the power requirement of the PTC9 is controlled according to the value of the water temperature sensor II 14; when the battery is in a self-circulation mode, the controller is powered on, the temperature of the battery body is in a defined range, and the electric water pump III 12 runs at a specific rotating speed; and when the temperature of the battery body is more than or equal to T11, the battery cooling mode is started, and the rotating speed of the electric water pump III 12 is controlled according to the difference between the ambient temperature and the temperature of the battery.
Compared with the prior art, the invention has the beneficial effects that:
1. the cooling system of the electric vehicle is connected with parts such as a motor, a battery, a liquid storage tank, an electric water pump radiator and the like through pipelines, so that the arrangement of the cooling system is simplified;
2. the control method of the electric vehicle cooling system comprises a motor cooling control method and a battery cooling control method, wherein the motor cooling control method is used for controlling the electric water pump by identifying the temperature of a motor body, DCDC (direct current) and the like, and the temperature of cooling liquid is used for controlling the electric fan, so that accurate control can be realized, and the energy consumption of the electric water pump and the electric fan is reduced;
3. the battery cooling control method is used for controlling the battery cooling water pump by identifying the temperature difference between the battery temperature and the cooling liquid, and controlling the PTC and the battery water pump by identifying the battery temperature and the ambient temperature, and the rotating speed of the PTC water pump, so that the accurate control is realized, and the energy consumption of the electric water pump and the PTC is reduced;
4. in the control method, when the cooling system parts are controlled, the opening and closing conditions are set differently, so that the frequent opening and closing of the cooling system parts can be effectively avoided, and the NVH of the system is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic diagram of an electric vehicle cooling system of the present invention;
FIG. 2 is a schematic view of the motor cooling control scheme of the present invention;
fig. 3 is a diagram of a battery cooling control scheme of the present invention.
In the figure, 1, a liquid storage tank I2, a radiator 3, an electric fan 4, a water temperature sensor I5, an electric water pump I6, a motor and controller 7, a DCDC 8, an electric water pump II 9, a PTC 10, a heat exchanger 11, a CHILLER 12, an electric water pump III 13, a battery 14, a water temperature sensor II 15, a liquid storage tank II 16, a motor cooling system closing 17, a motor cooling mode I18, a motor cooling mode II 19, a battery cooling system closing 20, a battery heating mode 21, a battery self-circulation mode 22 and a battery cooling mode.
Detailed Description
The invention is further illustrated by the following examples:
the present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
As shown in fig. 1-3, the cooling system of the electric vehicle of the present invention is composed of a controller, a motor cooling system and a battery cooling system;
the motor cooling system is composed of a liquid storage tank I1, a radiator 2, an electric fan 3, a water temperature sensor I4, an electric water pump I5, a motor, a controller 6 and a DCDC7, and is connected through a cooling pipeline, and cooling liquid is arranged in the middle of the pipeline.
Wherein the motor and controller 6 and DCDC7 are required radiator components; the radiator 2 and the electric fan 3 are radiator components; .
The battery cooling system consists of an electric water pump II 8, a PTC9, a heat exchanger 10, a CHILLER11, an electric water pump III 12, a battery 13, a water temperature sensor II 14 and a liquid storage tank II 15, and is connected through a cooling pipeline, and cooling liquid is arranged in the middle of the pipeline.
The liquid storage tank I1 and the liquid storage tank II 15 are used for supplementing cooling liquid and exhausting gas in a cooling system; the radiator 2 is used for exchanging heat of the motor loop into air; the electric fan 3 provides air volume to take away heat of the radiator; the water temperature sensor I4 and the water temperature sensor II 14 are used for collecting temperature signals and then transmitting the temperature signals to the controller; the electric water pump I5, the electric water pump II 8 and the electric water pump III 12 are power sources for circulation of cooling liquid in the cooling system; the motor and controller 6 is a component requiring cooling; the DCDC7 is a cooling demand component; the battery 13 is a heating and cooling component, and heat is exchanged through the heat exchanger 10 and the heat exchanger 11.
The control method of the cooling system of the electric vehicle is divided into a motor cooling control method and a battery cooling control method.
The motor cooling control method comprises the following steps:
the motor cooling is divided into 3 modes, namely a motor cooling system closing mode, a motor cooling mode I and a motor cooling mode II.
The body temperature signals of the motor and controller 6 and the DCDC7 are transmitted to the controller by the temperature sensor, and the temperature signal collected by the water temperature sensor 5 is transmitted to the controller. The controller judges whether the system is in one of a motor cooling system closing mode, a motor cooling mode I and a motor cooling mode II according to the relevant signals and whether the controller is powered on, and the 3 modes can be mutually converted.
The motor cooling system is shut down: the controller is powered down.
The motor cooling mode I: the controller is powered on, the mode is a default mode, and the electric water pump 5 is operated according to a default rotating speed n (the value is a calibration value).
The motor cooling mode II: when the body temperature of the motor and the controller 6 is equal to or more than T1, or the body temperature of the DCDC7 is equal to or more than T2, or the temperature signal of the water temperature sensor I4 is equal to or more than T3, the motor cooling mode II is entered.
At the moment, the electric water pump I5 is linearly controlled according to each temperature value.
And when the body temperature of the motor and controller 6 is less than or equal to T4, or the body temperature of the DCDC7 is less than or equal to T5, or the temperature signal of the water temperature sensor I4 is less than or equal to T6, exiting the motor cooling mode II and entering the motor cooling mode I.
When the temperature of the water temperature sensor I4 is not less than T7, the electric fan 3 is started, the rotating speed n is linearly controlled according to the temperature signal of the water temperature sensor, and when the temperature signal of the water temperature sensor I4 is not more than T8, the electric fan 3 stops running. In which the resonant speed of the electric fan needs to be specified and circumvented. And the relationship between the vehicle speed and the electric fan rotational speed is confirmed by experiments, taking into account the influence of the vehicle speed when the electric fan 3 is operated.
The battery cooling control method comprises the following steps:
the battery cooling is divided into 4 modes, which are a battery cooling system off, a battery heating mode, a battery self-circulation mode, and a battery cooling mode, respectively.
The controller collects the temperature of the battery body, the ambient temperature and the temperature of the cooling liquid, and judges which mode the system is in according to the related signals, and the modes can be mutually converted.
The battery cooling system is shut down: the controller is powered down.
Battery heating mode: and powering on the controller, and entering a battery heating mode when the environmental temperature is less than or equal to T9 and the temperature of the battery body is less than or equal to T10.
At the moment, the electric water pump runs at full speed, and the rotating speed of the electric water pump III 12 is linearly controlled according to the temperature of the battery body.
The power demand of the PTC9 is controlled according to the value of the water temperature sensor II 14.
Battery self-circulation mode: and powering on the controller, and enabling the temperature of the battery body to be within a defined range, and entering a battery self-circulation mode.
The electric water pump III 12 operates at a specific rotation speed.
Battery cooling mode: and when the temperature of the battery body is more than or equal to T11, entering a battery cooling mode.
The rotating speed of the electric water pump is controlled according to the difference between the ambient temperature and the battery temperature.
The temperature values of the temperature T1-T10 are obtained by experimental calibration.
The cooling system of the electric vehicle mainly comprises a motor cooling system and a battery cooling system, and mainly focuses on the temperature of cooling liquid, the temperature of a motor, a battery body, and other numerical values, can realize cooling/heating and accurate control according to needs, fully considers the temperature of parts needing to be cooled and the influence of environmental factors, can avoid resonance points, and improves the NVH performance of the whole vehicle.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (6)
1. An electric vehicle cooling system characterized by: the device comprises a controller, a motor cooling system and a battery cooling system;
the motor cooling system comprises a liquid storage tank I (1), a radiator (2), an electric fan (3), a water temperature sensor I (4), an electric water pump I (5), a motor, a controller (6) and a DCDC (7), which are connected through a cooling pipeline, wherein cooling liquid is arranged in the middle of the pipeline;
the battery cooling system consists of an electric water pump II (8), a PTC (9), a heat exchanger (10), a CHILLER (11), an electric water pump III (12), a battery (13), a water temperature sensor II (14) and a liquid storage tank II (15) which are connected through cooling pipelines, and cooling liquid is arranged in the middle of the pipelines;
the liquid storage tank I (1) and the liquid storage tank II (15) are used for compensating cooling liquid and exhausting gas; the radiator (2) is used for exchanging heat into the air; the electric fan (3) is used for taking away heat of the radiator (2), the water temperature sensor I (4) and the water temperature sensor II (14) are used for collecting temperature signals and then transmitting the temperature signals to the controller, and the electric water pump I (5), the electric water pump II (8) and the electric water pump III (12) are power sources of cooling liquid circulation.
2. The control method of the cooling system of the electric vehicle according to claim 1, comprising a motor cooling control, specifically comprising the steps of: the body temperature signal of motor and controller (6), DCDC (7) transmits for the controller, and the temperature signal that water temperature sensor I (4) gathered transmits for the controller, and the controller is according to relevant signal and whether the controller is gone up the judgement system and is in which kind of mode in motor cooling system closed, motor cooling mode I, motor cooling mode II, and 3 kinds of modes can change each other.
3. The control method of a cooling system of an electric vehicle according to claim 2, characterized in that: when the motor cooling system is closed, the controller is powered off; when the motor is in the cooling mode I, the controller is powered on, and the electric water pump I (5) is operated according to the default rotating speed; when the body temperature of the motor and the controller (6) is not less than T1, or the body temperature of the DCDC (7) is not less than T2, or the temperature signal of the water temperature sensor I (4) is not less than T3, the motor cooling mode II is entered, and the electric water pump I (5) is linearly controlled according to each temperature value.
4. The control method of a cooling system of an electric vehicle according to claim 3, characterized in that: when the body temperature of the motor and the controller (6) is less than or equal to T4, or the body temperature of DCDC7 is less than or equal to T5, or the temperature signal of the water temperature sensor I (4) is less than or equal to T6, exiting the motor cooling mode II and entering the motor cooling mode I; when the temperature of the water temperature sensor I (4) is larger than or equal to T7, the electric fan (3) is started, the rotating speed of the electric fan is linearly controlled according to the temperature signal of the water temperature sensor I (4), and when the temperature signal of the water temperature sensor I (4) is smaller than or equal to T8, the electric fan (3) stops running.
5. The control method of the cooling system of the electric vehicle according to claim 2, further comprising a battery cooling control, specifically comprising the steps of: the controller collects the temperature of the battery body, the ambient temperature and the temperature of the cooling liquid, and judges which of a battery cooling system closing mode, a battery heating mode, a battery self-circulation mode and a battery cooling mode the system is in according to the related signals, and the 4 modes can be mutually converted.
6. The control method of a cooling system of an electric vehicle according to claim 5, characterized in that: when the battery cooling system is closed, the controller is powered off; electrifying the controller, entering a battery heating mode when the environmental temperature is less than or equal to T9 and the temperature of the battery body is less than or equal to T10, operating the electric water pump at full speed, linearly controlling the rotating speed of the electric water pump III (12) according to the temperature of the battery body, and controlling the power requirement of the PTC (9) according to the numerical value of the water temperature sensor II (14); when the battery is in a self-circulation mode, the controller is powered on, the temperature of the battery body is in a defined range, and the electric water pump III (12) runs at a specific rotating speed; and when the temperature of the battery body is more than or equal to T11, the battery cooling mode is started, and the rotating speed of the electric water pump III (12) is controlled according to the difference between the ambient temperature and the temperature of the battery.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110555320.3A CN113135089A (en) | 2021-05-21 | 2021-05-21 | Electric vehicle cooling system and control method thereof |
| PCT/CN2021/134359 WO2022242100A1 (en) | 2021-05-21 | 2021-11-30 | Electric vehicle cooling system and control method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110555320.3A CN113135089A (en) | 2021-05-21 | 2021-05-21 | Electric vehicle cooling system and control method thereof |
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| CN113135089A true CN113135089A (en) | 2021-07-20 |
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| CN202110555320.3A Pending CN113135089A (en) | 2021-05-21 | 2021-05-21 | Electric vehicle cooling system and control method thereof |
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| WO (1) | WO2022242100A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113635731A (en) * | 2021-08-17 | 2021-11-12 | 一汽奔腾轿车有限公司 | High-efficient thermal management system of pure electric vehicles |
| WO2022242100A1 (en) * | 2021-05-21 | 2022-11-24 | 一汽奔腾轿车有限公司 | Electric vehicle cooling system and control method therefor |
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- 2021-11-30 WO PCT/CN2021/134359 patent/WO2022242100A1/en active Application Filing
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| WO2022242100A1 (en) | 2022-11-24 |
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