WO2022242100A1 - Electric vehicle cooling system and control method therefor - Google Patents

Electric vehicle cooling system and control method therefor Download PDF

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Publication number
WO2022242100A1
WO2022242100A1 PCT/CN2021/134359 CN2021134359W WO2022242100A1 WO 2022242100 A1 WO2022242100 A1 WO 2022242100A1 CN 2021134359 W CN2021134359 W CN 2021134359W WO 2022242100 A1 WO2022242100 A1 WO 2022242100A1
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Prior art keywords
cooling system
battery
temperature
controller
motor
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PCT/CN2021/134359
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French (fr)
Chinese (zh)
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钱辛
徐永兴
董向力
杨江雄
金永镇
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一汽奔腾轿车有限公司
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Publication of WO2022242100A1 publication Critical patent/WO2022242100A1/en

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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
    • 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
    • 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
    • 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

Definitions

  • the invention belongs to the technical field of electric vehicles, and in particular relates to an electric vehicle cooling system and a control method thereof.
  • the prior art discloses an electric vehicle cooling system and its control method.
  • the electric vehicle cooling system mainly includes DC/DC cooling water jackets connected and communicated by cooling pipelines, air conditioner controller cooling water jackets, motor Controller cooling water jacket, driving motor cooling water jacket, radiator, electric water pump, a coolant temperature sensor is installed between the outlet of the radiator and the inlet of the electric water pump, and an electric fan for enhancing heat dissipation is installed on the cooling device.
  • the electric fan is electrically connected with the main control unit, and the coolant temperature sensor is electrically connected with a main control unit; and a control method for controlling the cooling system of the electric vehicle.
  • the system and control method of this structure can ensure good heat dissipation of the main components of the electric vehicle and ensure driving safety.
  • this electric vehicle cooling system is mainly implemented for the motor cooling system, and the battery cooling and its control method are not disclosed.
  • a cooling system for an electric vehicle consisting 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 and a controller 6, and a DCDC7 connected through a cooling pipeline, and the middle of the pipeline is coolant;
  • the battery cooling system is composed of electric water pump II8, PTC9, heat exchanger 10, CHILLER11, electric water pump III12, battery 13, water temperature sensor II14 and liquid storage tank II15 connected through cooling pipelines, and the middle of the pipeline is coolant;
  • the liquid storage tank I1 and the liquid storage tank II15 are used to compensate the cooling liquid and exhaust; the radiator 2 is used to exchange heat into the air; the electric fan 3 is used to take away the heat of the radiator 2;
  • the water temperature sensor I4 and the water temperature sensor II14 are used to collect the temperature signal and transmit it to the controller; the electric water pump I5, the electric water pump II8 and the electric water pump III12 are the power source of the coolant circulation.
  • the control method of the electric vehicle cooling system includes motor cooling control, including the following steps: the body temperature signals of the motor and the controller 6 and DCDC7 are transmitted to the controller, and the temperature signal collected by the water temperature sensor I4 is transmitted to the controller. Relevant signals and whether the controller is powered on determine which mode the system is in, the motor cooling system off, the motor cooling mode I, and the motor cooling mode II, and the three modes can be transformed into each other.
  • the controller when the motor cooling system is closed, the controller is powered off; in the motor cooling mode I, the controller is powered on, and the electric water pump I5 operates at the default speed; in the motor cooling mode II, when the motor and the controller 6.
  • the body temperature ⁇ T1 or when the body temperature of DCDC7 ⁇ T2, or when the temperature signal of the water temperature sensor I4 ⁇ T3, enter the motor cooling mode II, and the electric water pump I5 performs linear control according to each temperature value.
  • the body temperature of the motor and the controller 6 is ⁇ T4
  • the body temperature of the DCDC 7 is ⁇ T5
  • the temperature signal of the water temperature sensor I4 is ⁇ T6
  • the electric fan 3 starts, and its speed 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 ⁇ T8, the electric fan 3 stops running.
  • the above-mentioned control method of the electric vehicle cooling system also includes battery cooling control, including the following steps: the controller collects the temperature of the battery body, the ambient temperature, and the temperature of the coolant, and judges that the system is in the mode of closing the battery cooling system and heating the battery according to relevant signals , the battery self-circulation mode and the battery cooling mode, and the four modes can be transformed into each other.
  • the controller when the battery cooling system is closed, the controller is powered off; when the controller is powered on, the ambient temperature ⁇ T9 and the battery body temperature ⁇ T10 enters the battery heating mode, the electric water pump runs at full speed, and the speed of the electric water pump III12 follows the speed of the battery body Temperature linear control, the power demand of PTC9 is controlled according to the value of water temperature sensor II14; in the battery self-circulation mode, the controller is powered on, and the temperature of the battery body is within the defined range, and the electric water pump III12 runs at a specific speed; when the battery When the body temperature ⁇ T11, it enters the battery cooling mode, and the speed of the electric water pump III12 is controlled according to the difference between the ambient temperature and the battery temperature.
  • the electric vehicle cooling system connects the motor, battery, liquid storage tank, electric water pump radiator and other components through pipelines, which simplifies the layout of the cooling system;
  • the control method of electric vehicle cooling system is divided into motor cooling control method and battery cooling control method.
  • the motor cooling control method is used to control the electric water pump by identifying the temperature of the motor body, DCDC, etc., and the temperature in the coolant is used to control the electric fan. It can realize precise control and reduce the energy consumption of electric water pumps and electric fans;
  • the battery cooling control method is used to control the battery cooling water pump by identifying the temperature difference between the battery temperature and the coolant, and by identifying the battery temperature and ambient temperature to control the PTC, battery water pump, and the speed of the PTC water pump to achieve precise control and reduce Energy consumption of electric water pump and PTC;
  • the opening and closing conditions are set differently, which can effectively avoid frequent opening and closing of the cooling system components and improve the system NVH.
  • FIG. 1 schematic diagram of the electric vehicle cooling system of the present invention
  • FIG. 2 motor cooling control mode diagram of the present invention
  • Fig. 3 is the battery cooling control mode diagram of the present invention.
  • the battery cooling system is composed of electric water pump II8, PTC9, heat exchanger 10, CHILLER11, electric water pump III12, battery 13, water temperature sensor II14 and liquid storage tank II15, connected by cooling pipelines, and the middle of the pipelines is coolant.
  • the liquid storage tank I1 and the liquid storage tank II15 are used in the cooling system to supplement the coolant and exhaust; the radiator 2 is used to exchange the heat of the motor circuit into the air; the electric fan 3 , to provide air volume to take away the heat of the radiator; the water temperature sensor I4 and water temperature sensor II14 are used to collect temperature signals and transmit them to the controller; the electric water pump I5, electric water pump II8 and electric water pump III12 are used to circulate the coolant in the cooling system
  • the power source; the motor and controller 6 are components required for cooling; the DCDC7 is a component required for cooling; the battery 13 is a component required for heating and cooling, and heat is exchanged through the heat exchanger 10 and CHILLER11.
  • the motor cooling control method is as follows:
  • the motor cooling system is closed: the controller is powered off.
  • the motor cooling mode I the controller is powered on, this mode is the default mode, and the electric water pump 5 operates at the default speed n (this value is the calibration value).
  • the electric water pump I5 is linearly controlled according to each temperature value.
  • the electric fan 3 starts, and its speed n is linearly controlled according to the temperature signal of the water temperature sensor.
  • the temperature signal of the water temperature sensor I4 ⁇ T8 the electric fan 3 stops running. Among them, it is necessary to clarify the resonance speed of the electric fan and avoid it. And confirm the relationship between the vehicle speed and the rotating speed of the electric fan according to the test, and consider the influence of the vehicle speed when the electric fan 3 is running.
  • the battery cooling is divided into 4 modes, which are battery cooling system off, battery heating mode, battery self-circulation mode and battery cooling mode.
  • the battery cooling system is closed: the controller is powered off.
  • the electric water pump runs at full speed, and the speed of the electric water pump III12 is linearly controlled according to the temperature of the battery body.
  • the power demand of PTC9 is controlled according to the value of water temperature sensor II14.
  • Battery self-circulation mode When the controller is powered on, and the temperature of the battery body is within the defined range, it enters the battery self-circulation mode.
  • the electric water pump III12 operates at a specific speed.
  • Battery cooling mode When the temperature of the battery body ⁇ T11, enter the battery cooling mode.
  • the 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 above-mentioned temperatures T1-T10 in the present invention are all obtained through experimental calibration.
  • the electric vehicle cooling system of the present invention is mainly implemented for the motor cooling system and the battery cooling system, and the main focus is on the temperature of the cooling liquid and the values of the motor and battery body graphs, etc., which can realize cooling/heating and precise control on demand, fully considering the needs
  • the temperature of the cooling parts and the influence of environmental factors can avoid the resonance point and improve the NVH performance of the whole vehicle.

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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

Disclosed in the present invention are an electric vehicle cooling system and a control method. The electric vehicle cooling system is composed of a motor cooling system and a battery cooling system, wherein the motor cooling system is composed of a liquid storage tank, a heat dissipator, an electric fan, a water temperature sensor, an electric water pump, a motor, a controller and a DCDC, which are connected by means of a cooling pipeline, the water temperature sensor being used for collecting a temperature signal and then transmitting same to the controller; and the battery cooling system is composed of an electric water pump, a PTC, a heat exchanger, a chiller, an electric water pump, a battery, a water temperature sensor and a liquid storage tank, which are connected by means of a cooling pipeline, the water temperature sensor collecting a temperature signal and then transmitting same to the controller. The control method for an electric vehicle cooling system is divided into a motor cooling control method and a battery cooling control method. By means of the electric vehicle cooling system and the control method in the present invention, a cooling system can be simplified, and the power consumption of parts of the cooling system can be reduced; and by means of the control method, the parts of the cooling system are effectively prevented from being frequently opened and closed, thereby improving the NVH performance of the system.

Description

一种电动车冷却系统及其控制方法An electric vehicle cooling system and its control method 技术领域technical field
本发明属于电动汽车技术领域，具体涉及一种电动车冷却系统及其控制方法。The invention belongs to the technical field of electric vehicles, and in particular relates to an electric vehicle cooling system and a control method thereof.
背景技术Background technique
目前，在汽车行业中电动车发展较为迅速，电动车开发过程中，如何简化冷却系统以达到降低成本以及布置难度，如何精准控制冷却系统部件以达到降低功耗是目前电动车冷却系统开发的的重点和难点。At present, electric vehicles are developing rapidly in the automotive industry. During the development of electric vehicles, how to simplify the cooling system to reduce costs and layout difficulties, and how to accurately control cooling system components to reduce power consumption are the current development of electric vehicle cooling systems. Key points and difficult points.
现有技术公开了一种电动车冷却系统及其控制方法，电动车冷却系统，主要包括由冷却管路依次连接在一起并被连通的DC/DC冷却水套、空调控制器冷却水套、电机控制器冷却水套、驱动电机冷却水套、散热器、电动水泵，在散热器出口与电动水泵的入口之间安装有冷却液温度传感器，散热装置上还设有用来加强散热的电动风扇，该电动风扇与主控制单元电连接，而冷却液温度传感器与一主控制单元电连接；以及一种控制该电动车冷却系统的控制方法。这种结构的系统及控制方法能够保障电动汽车上主要部件的良好散热，并确保行车安全。但是，该电动车冷却系统主要对于电机冷却系统进行，未公开电池冷却及其控制方法。The prior art discloses an electric vehicle cooling system and its control method. The electric vehicle cooling system mainly includes DC/DC cooling water jackets connected and communicated by cooling pipelines, air conditioner controller cooling water jackets, motor Controller cooling water jacket, driving motor cooling water jacket, radiator, electric water pump, a coolant temperature sensor is installed between the outlet of the radiator and the inlet of the electric water pump, and an electric fan for enhancing heat dissipation is installed on the cooling device. The electric fan is electrically connected with the main control unit, and the coolant temperature sensor is electrically connected with a main control unit; and a control method for controlling the cooling system of the electric vehicle. The system and control method of this structure can ensure good heat dissipation of the main components of the electric vehicle and ensure driving safety. However, this electric vehicle cooling system is mainly implemented for the motor cooling system, and the battery cooling and its control method are not disclosed.
发明内容Contents of the invention
本发明的目的就在于提供一种电动车冷却系统，还提供一种电动车冷却系统的控制方法，以解决简化冷却系统以及降低冷却系统零部件功耗的问题，能够有效避免冷却系统零部件频繁开闭，改善系统NVH；可实现按需进行冷却/加热，并考虑了环境温度的影响，实现了精确控制；具有能耗优化、NVH改善等优点。The object of the present invention is to provide a cooling system for an electric vehicle, and also provide a control method for the cooling system of an electric vehicle to solve the problems of simplifying the cooling system and reducing the power consumption of components in the cooling system, and can effectively avoid frequent cooling of components in the cooling system. Open and close, improve system NVH; can realize on-demand cooling/heating, and consider the influence of ambient temperature, realize precise control; have the advantages of energy consumption optimization, NVH improvement, etc.
本发明的目的是通过以下技术方案实现的：The purpose of the present invention is achieved through the following technical solutions:
一种电动车冷却系统，由控制器、电机冷却系统和电池冷却系统构成；A cooling system for an electric vehicle, consisting of a controller, a motor cooling system and a battery cooling system;
所述电机冷却系统，由通过冷却管路连接的储液罐Ⅰ1、散热器2、电动风扇3、水温传感器Ⅰ4、电动水泵Ⅰ5、电机及控制器6以及DCDC7组成，管路中间为冷却液；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 and a controller 6, and a DCDC7 connected through a cooling pipeline, and the middle of the pipeline is coolant;
所述电池冷却系统由通过冷却管路连接的电动水泵Ⅱ8、PTC9、换热器10、CHILLER11、电动水泵Ⅲ12、电池13、水温传感器Ⅱ14以及储液罐Ⅱ15组成，管路中间为冷却液；The battery cooling system is composed of electric water pump II8, PTC9, heat exchanger 10, CHILLER11, electric water pump III12, battery 13, water temperature sensor II14 and liquid storage tank II15 connected through cooling pipelines, and the middle of the pipeline is coolant;
所述储液罐Ⅰ1和储液罐Ⅱ15用于补偿冷却液和排气；所述散热器2用于将热量换到空气中；所述电动风扇3用于带走散热器2的热量；所述水温传感器Ⅰ4和水温传感器Ⅱ14用于采集温度信号后传递给控制器；所述电动水泵Ⅰ5，电动水泵Ⅱ8和电动水泵Ⅲ12是冷却液循环的动力来源。The liquid storage tank I1 and the liquid storage tank II15 are used to compensate the cooling liquid and exhaust; the radiator 2 is used to exchange heat into the air; the electric fan 3 is used to take away the heat of the radiator 2; The water temperature sensor I4 and the water temperature sensor II14 are used to collect the temperature signal and transmit it to the controller; the electric water pump I5, the electric water pump II8 and the electric water pump III12 are the power source of the coolant circulation.
上述电动车冷却系统的控制方法包括电机冷却控制，包括以下步骤：所述电机及控制器6、DCDC7的本体温度信号传递给控制器，水温传感器Ⅰ4采集的温度信号传递给控制器，控制器根据相关信号以及控制器是否上电判断系统处于电机冷却系统关闭、电机冷却模式Ⅰ、电机冷却模式Ⅱ中的何种模式，且3种模式可以互相转变。The control method of the electric vehicle cooling system includes motor cooling control, including the following steps: the body temperature signals of the motor and the controller 6 and DCDC7 are transmitted to the controller, and the temperature signal collected by the water temperature sensor I4 is transmitted to the controller. Relevant signals and whether the controller is powered on determine which mode the system is in, the motor cooling system off, the motor cooling mode I, and the motor cooling mode II, and the three modes can be transformed into each other.
进一步地，所述电机冷却系统关闭时，控制器下电；所述电机冷却模式Ⅰ时，控制器上电，电动水泵Ⅰ5按照默认转速进行；所述电机冷却模式Ⅱ时，当电机及控制器6本体温度≥T1时，或DCDC7的本体温度≥T2时，或水温传感器Ⅰ4温度信号≥T3时，进入电机冷却模式Ⅱ，电动水泵Ⅰ5按照各个温度值进行线性控制。Further, when the motor cooling system is closed, the controller is powered off; in the motor cooling mode I, the controller is powered on, and the electric water pump I5 operates at the default speed; in the motor cooling mode II, when the motor and the controller 6. When the body temperature ≥ T1, or when the body temperature of DCDC7 ≥ T2, or when the temperature signal of the water temperature sensor I4 ≥ T3, enter the motor cooling mode II, and the electric water pump I5 performs linear control according to each temperature value.
更进一步地，当电机及控制器6本体温度≤T4时，或DCDC7的本体温度≤T5时，或水温传感器Ⅰ4温度信号≤T6时，退出电机冷却模式Ⅱ，进入到电机冷却模式Ⅰ；水温传感器Ⅰ4温度≥T7时，电动风扇3启动，其转速按照水温传感器Ⅰ4的温度信号进行线性控制，当水温传感器Ⅰ4温度信号≤T8时，电动风扇3停止运行。Furthermore, when the body temperature of the motor and the controller 6 is ≤ T4, or the body temperature of the DCDC 7 is ≤ T5, or the temperature signal of the water temperature sensor I4 is ≤ T6, exit the motor cooling mode II and enter the motor cooling mode I; the water temperature sensor When the temperature of Ⅰ4 ≥ T7, the electric fan 3 starts, and its speed 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 ≤ T8, the electric fan 3 stops running.
上述电动车冷却系统的控制方法，还包括电池冷却控制，包括以下步骤：所述控制器采集电池本体温度，环境温度、冷却液温度，并根据相关信号判断系统处于电池冷却系统关闭、电池加热模式、电池自循环模式以及电池冷却模式中的何种模式，且4种模式可以互相转变。The above-mentioned control method of the electric vehicle cooling system also includes battery cooling control, including the following steps: the controller collects the temperature of the battery body, the ambient temperature, and the temperature of the coolant, and judges that the system is in the mode of closing the battery cooling system and heating the battery according to relevant signals , the battery self-circulation mode and the battery cooling mode, and the four modes can be transformed into each other.
进一步地，所述电池冷却系统关闭时，控制器下电；控制器上电，环境温度≤T9且电池本体温度≤T10时进入电池加热模式，电动水泵全速运行，电动水泵Ⅲ12的转速按照电池本体温度线性控制，PTC9的功率需求按照水温传感器Ⅱ14的数值进行控制；所述电池自循环模式时，控制器上电，且电池本体温度处于定义的范围内，电动水泵Ⅲ12按照特定转速运行；当电池本体温度≥T11时进入电池冷却模式，电动水泵Ⅲ12的转速按照环境温度和电池温度差值进行控制。Further, when the battery cooling system is closed, the controller is powered off; when the controller is powered on, the ambient temperature ≤ T9 and the battery body temperature ≤ T10 enters the battery heating mode, the electric water pump runs at full speed, and the speed of the electric water pump III12 follows the speed of the battery body Temperature linear control, the power demand of PTC9 is controlled according to the value of water temperature sensor II14; in the battery self-circulation mode, the controller is powered on, and the temperature of the battery body is within the defined range, and the electric water pump III12 runs at a specific speed; when the battery When the body temperature ≥ T11, it enters the battery cooling mode, and the speed of the electric water pump III12 is controlled according to the difference between the ambient temperature and the battery temperature.
与现有技术相比，本发明的有益效果是：Compared with prior art, the beneficial effect of the present invention is:
1、电动车冷却系统通过管路连接电机、电池、储液罐、电动水泵散热器等零部件，简化了冷却系统的布置；1. The electric vehicle cooling system connects the motor, battery, liquid storage tank, electric water pump radiator and other components through pipelines, which simplifies the layout of the cooling system;
2、电动车冷却系统的控制方法分为电机冷却控制方法以及电池冷却控制方法，电机冷却控制方法通过识别电机本体、DCDC等温度用于控制电动水泵，冷却液中的温度用于控制电动风扇，可实现精准控制，减少电动水泵、电动风扇的能耗；2. The control method of electric vehicle cooling system is divided into motor cooling control method and battery cooling control method. The motor cooling control method is used to control the electric water pump by identifying the temperature of the motor body, DCDC, etc., and the temperature in the coolant is used to control the electric fan. It can realize precise control and reduce the energy consumption of electric water pumps and electric fans;
3、电池冷却控制方法通过识别电池温度与冷却液的温度差值用于控制电池冷却水泵，并通过识别电池温度以及环境温度用于控制PTC以及电池水泵，PTC水泵的转速，实现精准控制，减少电动水泵、PTC的能耗；3. The battery cooling control method is used to control the battery cooling water pump by identifying the temperature difference between the battery temperature and the coolant, and by identifying the battery temperature and ambient temperature to control the PTC, battery water pump, and the speed of the PTC water pump to achieve precise control and reduce Energy consumption of electric water pump and PTC;
4、控制方法中在进行冷却系统零部件控制时，开启和关闭条件设置不同，可以有效避免冷却系统零部件频繁开闭，改善系统NVH。4. In the control method, when controlling the cooling system components, the opening and closing conditions are set differently, which can effectively avoid frequent opening and closing of the cooling system components and improve the system NVH.
附图说明Description of drawings
为了更清楚地说明本发明实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，应当理解，以下附图仅示出了本发明的某些实施例，因此不应被看作是对范围的限定，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他相关的附图。In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and thus It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.
图1本发明电动车冷却系统原理图；Fig. 1 schematic diagram of the electric vehicle cooling system of the present invention;
图2本发明的电机冷却控制模式图；Fig. 2 motor cooling control mode diagram of the present invention;
图3本发明的电池冷却控制模式图。Fig. 3 is the battery cooling control mode diagram of the present invention.
图中，1.储液罐Ⅰ 2.散热器 3.电动风扇 4.水温传感器Ⅰ 5.电动水泵Ⅰ 6.电机及控制器 7.DCDC 8.电动水泵Ⅱ 9.PTC 10.热交换器  11.CHILLER 12.电动水泵Ⅲ 13.电池 14.水温传感器Ⅱ 15储液罐Ⅱ 16.电机冷却系统关闭 17.电机冷却模式Ⅰ 18.电机冷却模式Ⅱ 19.电池冷却系统关闭 20.电池加热模式 21.电池自循环模式 22.电池冷却模式。In the figure, 1. Liquid storage tank Ⅰ 2. Radiator 3. Electric fan 4. Water temperature sensor Ⅰ 5. Electric water pump Ⅰ 6. Motor and controller 7. DCDC 8. Electric water pump Ⅱ 9. PTC 10. Heat exchanger 11 .CHILLER 12. Electric water pump Ⅲ 13. Battery 14. Water temperature sensor Ⅱ 15 Liquid storage tank Ⅱ 16. Motor cooling system off 17. Motor cooling mode Ⅰ 18. Motor cooling mode Ⅱ 19. Battery cooling system off 20. Battery heating mode 21 .Battery self-circulation mode 22.Battery cooling mode.
具体实施方式Detailed ways
下面结合实施例对本发明作进一步说明：The present invention will be further described below in conjunction with embodiment:
下面结合附图和实施例对本发明作进一步的详细说明。可以理解的是，此处所描述的具体实施例仅仅用于解释本发明，而非对本发明的限定。另外还需要说明的是，为了便于描述，附图中仅示出了与本发明相关的部分而非全部结构。The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步定义和解释。同时，在本发明的描述中，术语“第一”、“第二”等仅用于区分描述，而不能理解为指示或暗示相对重要性。It should be noted that like numerals and letters denote similar items in the following figures, therefore, once an item is defined in one figure, it does not require further definition and explanation in subsequent figures. Meanwhile, in the description of the present invention, the terms "first", "second", etc. are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance.
如图1-图3所示，本发明电动车冷却系统，由控制器、电机冷却系统和电池冷却系统构成；As shown in Figures 1-3, the electric vehicle cooling system of the present invention is composed of a controller, a motor cooling system and a battery cooling system;
所述电机冷却系统由储液罐Ⅰ1、散热器2、电动风扇3、水温传感器Ⅰ4、电动水泵Ⅰ5、电机及控制器6以及DCDC7组成，通过冷却管路连接，管路中间为冷却液。The motor cooling system is composed of liquid storage tank I1, radiator 2, electric fan 3, water temperature sensor I4, electric water pump I5, motor and controller 6, and DCDC7, which are connected by cooling pipelines with coolant in the middle.
其中，所述电机及控制器6和DCDC7为需求散热器部件；所述散热器2和电动风扇3为散热器部件；。Wherein, the motor and controller 6 and DCDC7 are required radiator components; the radiator 2 and electric fan 3 are radiator components;
所述电池冷却系统由电动水泵Ⅱ8、PTC9、换热器10、CHILLER11、电动 水泵Ⅲ12、电池13、水温传感器Ⅱ14以及储液罐Ⅱ15组成，通过冷却管路连接，且管路中间为冷却液。The battery cooling system is composed of electric water pump II8, PTC9, heat exchanger 10, CHILLER11, electric water pump III12, battery 13, water temperature sensor II14 and liquid storage tank II15, connected by cooling pipelines, and the middle of the pipelines is coolant.
所述储液罐Ⅰ1和储液罐Ⅱ15在冷却系统中用于起到补冷却液和排气的作用；所述散热器2用于将电机回路的热量换到空气中；所述电动风扇3，提供风量带走散热器的热量；所述水温传感器Ⅰ4和水温传感器Ⅱ14用于采集温度信号后传递给控制器；所述电动水泵Ⅰ5、电动水泵Ⅱ8和电动水泵Ⅲ12是冷却系统中冷却液循环的动力来源；所述电机及控制器6为冷却需求的部件；所述DCDC7为冷却需求部件；所述电池13为加热以及冷却需求零部件，通过换热器10、CHILLER11进行热量交换。The liquid storage tank I1 and the liquid storage tank II15 are used in the cooling system to supplement the coolant and exhaust; the radiator 2 is used to exchange the heat of the motor circuit into the air; the electric fan 3 , to provide air volume to take away the heat of the radiator; the water temperature sensor I4 and water temperature sensor II14 are used to collect temperature signals and transmit them to the controller; the electric water pump I5, electric water pump II8 and electric water pump III12 are used to circulate the coolant in the cooling system The power source; the motor and controller 6 are components required for cooling; the DCDC7 is a component required for cooling; the battery 13 is a component required for heating and cooling, and heat is exchanged through the heat exchanger 10 and CHILLER11.
所述电动车冷却系统控制方法分为电机冷却控制方法和电池冷却控制方法。The electric vehicle cooling system control method is divided into a motor cooling control method and a battery cooling control method.
电机冷却控制方法如下：The motor cooling control method is as follows:
电机冷却分为3种模式，分别为电机冷却系统关闭、电机冷却模式Ⅰ和电机冷却模式Ⅱ。The motor cooling is divided into three modes, which are motor cooling system off, motor cooling mode I and motor cooling mode II.
所述电机及控制器6、DCDC7的本体温度信号由温度传感器传递给控制器，水温传感器5采集的温度信号传递给控制器。控制器根据相关信号以及控制器是否上电判断系统处于电机冷却系统关闭、电机冷却模式Ⅰ、电机冷却模式Ⅱ中模式中的一种，且3种模式可以互相转变。The body temperature signals of the motor and the controller 6 and 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. According to the relevant signals and whether the controller is powered on, the controller judges that the system is in one of the modes of motor cooling system off, motor cooling mode I, and motor cooling mode II, and the three modes can be transformed into each other.
所述电机冷却系统关闭：控制器下电。The motor cooling system is closed: the controller is powered off.
所述电机冷却模式Ⅰ：控制器上电，此模式为默认模式，电动水泵5按照默认转速n(此值为标定值)进行。The motor cooling mode I: the controller is powered on, this mode is the default mode, and the electric water pump 5 operates at the default speed n (this value is the calibration value).
所述电机冷却模式Ⅱ：当电机及控制器6本体温度≥T1时，或DCDC7的本体温度≥T2时，或水温传感器Ⅰ4温度信号≥T3时，进入电机冷却模式Ⅱ。The motor cooling mode II: when the body temperature of the motor and the controller 6 ≥ T1, or the body temperature of the DCDC 7 ≥ T2, or the temperature signal of the water temperature sensor I4 ≥ T3, enter the motor cooling mode II.
此时电动水泵Ⅰ5按照各个温度值进行线性控制。At this time, the electric water pump I5 is linearly controlled according to each temperature value.
当电机及控制器6本体温度≤T4时，或DCDC7的本体温度≤T5时，或水温传感器Ⅰ4温度信号≤T6时，退出电机冷却模式Ⅱ，进入到电机冷却模式Ⅰ。When the body temperature of the motor and controller 6 ≤ T4, or the body temperature of DCDC 7 ≤ T5, or the temperature signal of the water temperature sensor I4 ≤ T6, exit the motor cooling mode II and enter the motor cooling mode I.
水温传感器Ⅰ4温度≥T7时，电动风扇3启动，其转速n按照水温传感器的温度信号进行线性控制，当水温传感器Ⅰ4温度信号≤T8时，电动风扇3停止运行。其中需要明确电动风扇的共振转速并进行规避。并且根据试验确认车速与电动风扇转速的关系，在电动风扇3运行时考虑车速影响。When the temperature of the water temperature sensor I4 ≥ T7, the electric fan 3 starts, and its speed n is linearly controlled according to the temperature signal of the water temperature sensor. When the temperature signal of the water temperature sensor I4 ≤ T8, the electric fan 3 stops running. Among them, it is necessary to clarify the resonance speed of the electric fan and avoid it. And confirm the relationship between the vehicle speed and the rotating speed of the electric fan according to the test, and consider the influence of the vehicle speed when the electric fan 3 is running.
电池冷却控制方法如下：The battery cooling control method is as follows:
电池冷却分为4种模式，分别为电池冷却系统关闭、电池加热模式、电池自循环模式以及电池冷却模式。The battery cooling is divided into 4 modes, which are battery cooling system off, battery heating mode, battery self-circulation mode and battery cooling mode.
所述控制器采集电池本体温度，环境温度、冷却液温度，并根据相关信号判断系统处于何种模式，且模式可以互相转变。The controller collects the temperature of the battery body, the ambient temperature, and the coolant temperature, and judges which mode the system is in according to the relevant signals, and the modes can be changed between each other.
所述电池冷却系统关闭：控制器下电。The battery cooling system is closed: the controller is powered off.
电池加热模式：控制器上电，环境温度≤T9且电池本体温度≤T10时，进入电池加热模式。Battery heating mode: when the controller is powered on, and the ambient temperature is ≤ T9 and the battery body temperature is ≤ T10, it will enter the battery heating mode.
此时电动水泵全速运行，电动水泵Ⅲ12的转速按照电池本体温度线性控制。At this time, the electric water pump runs at full speed, and the speed of the electric water pump III12 is linearly controlled according to the temperature of the battery body.
PTC9的功率需求按照水温传感器Ⅱ14的数值进行控制。The power demand of PTC9 is controlled according to the value of water temperature sensor II14.
电池自循环模式：控制器上电，且电池本体温度处于定义的范围内，进入电池自循环模式。Battery self-circulation mode: When the controller is powered on, and the temperature of the battery body is within the defined range, it enters the battery self-circulation mode.
电动水泵Ⅲ12按照特定转速运行。The electric water pump III12 operates at a specific speed.
电池冷却模式：当电池本体温度≥T11时，进入电池冷却模式。Battery cooling mode: When the temperature of the battery body ≥ T11, enter the battery cooling mode.
电动水泵的转速按照环境温度和电池温度差值进行控制。The speed of the electric water pump is controlled according to the difference between the ambient temperature and the battery temperature.
本发明上述温度T1-T10的温度取值均是通过实验标定获取。The temperature values of the above-mentioned temperatures T1-T10 in the present invention are all obtained through experimental calibration.
本发明电动车冷却系统主要对于电机冷却系统以及电池冷却系统进行，且主要着眼点为冷却液温度以及电机、电池本体文图等数值，可以实现按需进行冷却/加热以及精确控制，充分考虑需求冷却零部件的温度以及环境因素的影响，能够规避共振点，提升整车NVH性能。The electric vehicle cooling system of the present invention is mainly implemented for the motor cooling system and the battery cooling system, and the main focus is on the temperature of the cooling liquid and the values of the motor and battery body graphs, etc., which can realize cooling/heating and precise control on demand, fully considering the needs The temperature of the cooling parts and the influence of environmental factors can avoid the resonance point and improve the NVH performance of the whole vehicle.
注意，上述仅为本发明的较佳实施例及所运用技术原理。本领域技术人员会理解，本发明不限于这里所述的特定实施例，对本领域技术人员来说能够进行各种明显的变化、重新调整和替代而不会脱离本发明的保护范围。因此，虽然通过以上实施例对本发明进行了较为详细的说明，但是本发明不仅仅限于以上实施例，在不脱离本发明构思的情况下，还可以包括更多其他等效实施例，而本发明的范围由所附的权利要求范围决定。Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (6)

  1. 一种电动车冷却系统，其特征在于：由控制器、电机冷却系统和电池冷却系统构成；A cooling system for an electric vehicle, characterized in that it is composed of a controller, a motor cooling system and a battery cooling system;
    所述电机冷却系统，由通过冷却管路连接的储液罐Ⅰ(1)、散热器(2)、电动风扇(3)、水温传感器Ⅰ(4)、电动水泵Ⅰ(5)、电机及控制器(6)以及DCDC(7)组成，管路中间为冷却液；The motor cooling system consists of liquid storage tank I (1), radiator (2), electric fan (3), water temperature sensor I (4), electric water pump I (5), motor and control Composed of a device (6) and a DCDC (7), the middle of the pipeline is coolant;
    所述电池冷却系统由通过冷却管路连接的电动水泵Ⅱ(8)、PTC(9)、换热器(10)、CHILLER(11)、电动水泵Ⅲ(12)、电池(13)、水温传感器Ⅱ(14)以及储液罐Ⅱ(15)组成，管路中间为冷却液；The battery cooling system consists of electric water pump II (8), PTC (9), heat exchanger (10), CHILLER (11), electric water pump III (12), battery (13), water temperature sensor connected through cooling pipelines Ⅱ(14) and liquid storage tank Ⅱ(15), the middle of the pipeline is coolant;
    所述储液罐Ⅰ(1)和储液罐Ⅱ(15)用于补偿冷却液和排气；所述散热器(2)用于将热量换到空气中；所述电动风扇(3用于带走散热器(2)的热量；所述水温传感器Ⅰ(4)和水温传感器Ⅱ(14)用于采集温度信号后传递给控制器；所述电动水泵Ⅰ(5)，电动水泵Ⅱ(8)和电动水泵Ⅲ(12)是冷却液循环的动力来源。The liquid storage tank I (1) and liquid storage tank II (15) are used for compensating coolant and exhausting; the radiator (2) is used to exchange heat into the air; the electric fan (3 is used for Take away the heat of the radiator (2); the water temperature sensor I (4) and the water temperature sensor II (14) are used to collect temperature signals and transmit them to the controller; the electric water pump I (5), electric water pump II (8 ) and the electric water pump III (12) are the power sources for the coolant circulation.
  2. 根据权利要求1所述的一种电动车冷却系统的控制方法，其特征在于，包括电机冷却控制，具体包括以下步骤：所述电机及控制器(6)、DCDC(7)的本体温度信号传递给控制器，水温传感器Ⅰ(4)采集的温度信号传递给控制器，控制器根据相关信号以及控制器是否上电判断系统处于电机冷却系统关闭、电机冷却模式Ⅰ、电机冷却模式Ⅱ中的何种模式，且3种模式可以互相转变。A control method for the cooling system of an electric vehicle according to claim 1, characterized in that it includes motor cooling control, specifically including the following steps: the body temperature signal transmission of the motor and the controller (6), DCDC (7) The temperature signal collected by the water temperature sensor I (4) is transmitted to the controller, and the controller judges whether the system is in motor cooling system off, motor cooling mode I, or motor cooling mode II according to the relevant signal and whether the controller is powered on. There are three modes, and the three modes can be transformed into each other.
  3. 根据权利要求2所述的一种电动车冷却系统的控制方法，其特征在于：所述电机冷却系统关闭时，控制器下电；所述电机冷却模式Ⅰ时，控制器上电，电动水泵Ⅰ(5)按照默认转速进行；当电机及控制器(6)本体温度≥T1时，或DCDC(7)的本体温度≥T2时，或水温传感器Ⅰ(4)温度信号≥T3时，进入电机冷却模式Ⅱ，电动水泵Ⅰ(5)按照各个温度值进行线性控制。The control method for the 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 cooling mode I, the controller is powered on, and the electric water pump I (5) Perform according to the default speed; when the temperature of the motor and controller (6) body ≥ T1, or when the body temperature of DCDC (7) ≥ T2, or when the temperature signal of the water temperature sensor Ⅰ (4) ≥ T3, enter the motor cooling In mode II, the electric water pump I (5) is linearly controlled according to each temperature value.
  4. 根据权利要求3所述的一种电动车冷却系统的控制方法，其特征在于：当电机及控制器(6)本体温度≤T4时，或DCDC7的本体温度≤T5时，或水温传感器Ⅰ(4)温度信号≤T6时，退出电机冷却模式Ⅱ，进入到电机冷却模式Ⅰ；水温传感器Ⅰ(4)温度≥T7时，电动风扇(3)启动，其转速按照水温传感器Ⅰ(4)的温度信号进行线性控制，当水温传感器Ⅰ(4)温度信号≤T8时，电动风扇(3)停止运行。A control method for the 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 ≤ T4, or the body temperature of the DCDC7 is ≤ T5, or the water temperature sensor I (4 ) When the temperature signal ≤ T6, exit the motor cooling mode II and enter the motor cooling mode I; when the temperature of the water temperature sensor Ⅰ (4) ≥ T7, the electric fan (3) starts, and its speed follows the temperature signal of the water temperature sensor Ⅰ (4) Carry out linear control, when the temperature signal of the water temperature sensor I (4) ≤ T8, the electric fan (3) stops running.
  5. 根据权利要求2所述的一种电动车冷却系统的控制方法，其特征在于，还包括电池冷却控制，具体包括以下步骤：所述控制器采集电池本体温度，环境温度、冷却液温度，并根据相关信号判断系统处于电池冷却系统关闭、电池加热模式、电池自循环模式以及电池冷却模式中的何种模式，且4种模式可以互相转变。A control method for an electric vehicle cooling system according to claim 2, characterized in that it also includes battery cooling control, specifically comprising the following steps: the controller collects the temperature of the battery body, the ambient temperature, and the coolant temperature, and The relevant signals determine which mode the system is in, the battery cooling system off, the battery heating mode, the battery self-circulation mode, and the battery cooling mode, and the four modes can be transformed into each other.
  6. 根据权利要求5所述的一种电动车冷却系统的控制方法，其特征在于：所述电池冷却系统关闭时，控制器下电；控制器上电，环境温度≤T9且电池本体温度≤T10时进入电池加热模式，电动水泵全速运行，电动水泵Ⅲ(12)的转速按照电池本体温度线性控制，PTC(9)的功率需求按照水温传感器Ⅱ(14)的数值进行控制；所述电池自循环模式时，控制器上电，且电池本体温度处于定义的范围内，电动水泵Ⅲ(12)按照特定转速运行；当电池本体温度≥T11时进入电池冷却模式，电动水泵Ⅲ(12)的转速按照环境温度和电池温度差值进行控制。The method for controlling the 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; when the controller is powered on, the ambient temperature ≤ T9 and the battery body temperature ≤ T10 Enter the battery heating mode, the electric water pump runs at full speed, the speed of the electric water pump III (12) is linearly controlled according to the temperature of the battery body, and the power demand of the PTC (9) is controlled according to the value of the water temperature sensor II (14); the battery self-circulation mode When the controller is powered on and the temperature of the battery body is within the defined range, the electric water pump III (12) runs at a specific speed; when the temperature of the battery body ≥ T11, it enters the battery cooling mode, and the speed of the electric water pump III (12) follows the environment Temperature and battery temperature difference are controlled.
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