Predictive vehicle thermal management control method and system

Abstract

This invention relates to the field of thermal management technology for new energy vehicles, and discloses a predictive vehicle thermal management control method. During design, the thermal management control system is calibrated under the most stringent operating conditions. The vehicle is continuously charged and discharged at peak charge / discharge rates. While meeting the system's heat dissipation requirements under the most stringent conditions, the control parameters of the execution units are corrected based on the actual charge / discharge rate of the battery. During vehicle operation, the system uses vehicle-to-everything (V2X) maps to provide user routes and road information, and preemptively corrects the control parameters of the execution units to ensure the coolant temperature reaches the target value, thereby regulating the temperatures of the motor and battery. This invention also discloses a predictive vehicle thermal management control system. This predictive vehicle thermal management control method and system, taking into account different road conditions and varying battery charge / discharge rates, corrects the control parameters of execution units such as the water pump, fan, and air conditioning compressor, appropriately reducing the speed of the execution units to achieve the goal of reducing the overall vehicle thermal management energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal management of new energy vehicles, and in particular to a predictive whole-vehicle thermal management control method and system. Background Art

[0002] In the prior art, when controlling the temperature of motors and batteries, the control system parameters are always calibrated according to the most severe working conditions, and the coolant temperature is controlled at the target value, so as to control the temperature of the motors and batteries and meet the system heat dissipation requirements under different working conditions. However, the vehicle is not always in the most severe working conditions during operation. It can be said that most of the time the vehicle runs smoothly and does not require high-rate charging and discharging. If the control system parameters are calibrated according to the most severe working conditions, and the system execution units are executed according to the most severe working conditions, there will inevitably be a waste of resources and an increase in the energy consumption of the whole vehicle.

[0003] A Chinese patent (publication date: July 30, 2021, publication number: CN113370846A) discloses a battery predictive thermal management method and system, which belongs to the field of battery thermal management technology, including collecting motor participation information and temperature impact information, processing the motor participation information to obtain the charge and discharge rate, searching the preset charge and discharge rate battery temperature range table according to the charge and discharge rate to obtain a preliminary temperature range, selecting a preliminary temperature from the preliminary temperature range according to the temperature impact information, processing the temperature impact information to obtain a temperature impact coefficient, using the temperature impact coefficient to correct the preliminary temperature to obtain a battery target temperature, and adjusting the temperature of the power battery based on the battery target temperature. This application can design a reasonable battery target temperature, enable the power battery temperature regulation to meet the current and next stage driving power demand, improve the efficiency and accuracy of temperature regulation, ensure battery high voltage safety, and reduce the energy consumption required for temperature regulation. However, the temperature of the power battery changes dramatically during the charging and discharging process. Even if a reasonable battery target temperature is obtained, it is difficult to control the battery temperature at the target temperature. This technology has extremely high requirements on the control system. For new energy vehicles, the battery and motor temperature need to be controlled at the same time. However, the existing technology only proposes predictive heating and cooling methods for power batteries, which is not suitable for motor cooling. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies of the above-mentioned technologies and provide a predictive vehicle thermal management control method and system. According to the different battery charge and discharge rates on different roads and working conditions, the control parameters of execution units such as water pumps, fans, and air-conditioning compressors are corrected, and the speed of the execution units is appropriately reduced to achieve the purpose of reducing the thermal management energy consumption of the whole vehicle.

[0005] To achieve the above-mentioned purpose, the predictive vehicle thermal management control method designed in the present invention calibrates the thermal management control system according to the most severe working conditions during design, and continuously charges and discharges the vehicle at the peak charge and discharge rates. On the premise of meeting the system heat dissipation requirements under the most severe working conditions, the execution unit control parameters are corrected according to the actual charge and discharge rates of the battery. When the vehicle is driving, the driving route and road information provided to the user by the Internet of Vehicles map is used to correct the execution unit control parameters in advance, so that the coolant temperature reaches the target value, and the motor and battery temperatures are adjusted.

[0006] Preferably, it includes an information input unit, a control unit and an execution unit. The information input unit sends road information, driving information and battery charging and discharging current to the control unit. The control unit is used to process the information input by the information input unit and control the execution unit to run. The execution unit runs according to the instructions sent by the control unit.

[0007] Preferably, the information input unit includes a vehicle network map and a battery management system. The road information and driving information are provided by the vehicle network map, including the road surface altitude at different times. The driving information includes the driving route of the next stage and the corresponding road surface information. The battery charging and discharging current is provided by the battery management system. The control unit includes a motor battery thermostat, which obtains the road slope and slope length according to the current and next stage road surface altitudes, obtains the battery charging and discharging rate according to the battery charging and discharging current, and then determines the correction coefficient of the execution unit control parameter according to the road slope and slope length and the battery charging and discharging rate, and sends the corrected control parameter to the execution unit to control the operation of the execution unit. The execution unit includes an electronic fan, an electronic water pump, and an air-conditioning compressor. Through the reasonable operation of the execution unit, the coolant temperature is adjusted to control the motor and battery temperature.

[0008] Preferably, the battery management system provides the battery charge and discharge current at different times, and converts the battery charge and discharge rate according to the current capacity of the battery. When 0<charge and discharge rate ≤ C1, the correction coefficient is 0<x1<1; when C1<charge and discharge rate ≤ C2, the correction coefficient is 0<x2<1; when C2<charge and discharge rate ≤ C3, the correction coefficient is 0<x3<1; when C3<charge and discharge rate ≤ C4, the correction coefficient is 0<x4<1; when C4<charge and discharge rate ≤ C5, the correction coefficient x5=1, 0<x1<x2<x3<x4<x5=1, and the specific values ​​of the charge and discharge rate and the corresponding correction coefficient are determined through calibration.

[0009] Preferably, the Internet of Vehicles map provides the user with the driving route and the corresponding ground altitude. The ground slope and slope length are converted according to the ground altitude at different times. When 0≤slope<P1, it is regarded as a flat road, corresponding to 0<charge and discharge rate≤C1, and the correction coefficient is 0<x1<1; when P1≤slope<P2, it is regarded as a gentle slope 1, corresponding to C1<charge and discharge rate≤C2, and the correction coefficient is 0<x2<1; when P2≤slope<P3, it is regarded as a gentle slope 2, corresponding to C2<charge and discharge rate≤C3, and the correction coefficient is 0<x3<1; when P3≤slope<P4, it is regarded as a steep slope 1, corresponding to C3<charge and discharge rate≤C4, and the correction coefficient is 0<x4<1; when P4≤slope≤P5, it is regarded as a steep slope 2, corresponding to C4<charge and discharge rate≤C5, and the correction coefficient is x5=1, 0<x1<x2<x3<x4<x5=1, and the specific values ​​of the slope threshold, charge and discharge rate and correction coefficient are determined through calibration.

[0010] Preferably, when the vehicle is traveling on a flat road, the motor power is relatively small, the battery discharge rate is small, the motor battery thermostat receives information sent by the battery management system, and corrects the execution unit control parameters according to the current battery charge and discharge rate, the correction coefficient is x1, and the execution unit speed is the lowest.

[0011] Preferably, when the vehicle is traveling on a gentle slope 1, compared with traveling on a flat road, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives information sent by the battery management system, and corrects the execution unit control parameters according to the current battery charge and discharge rate, the correction coefficient is x2, and the execution unit speed increases compared with traveling on a flat road;

[0012] When the vehicle is traveling on gentle slope 2, compared with gentle slope 1, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives the information sent by the battery management system, and corrects the execution unit control parameters according to the current battery charge and discharge rate, the correction factor is x3, and the execution unit speed increases compared with gentle slope 1;

[0013] When the vehicle is traveling on steep slope 1, compared with gentle slope 2, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives the information sent by the battery management system, and corrects the execution unit control parameters according to the current battery charge and discharge rate, the correction factor is x4, and the execution unit speed increases compared with gentle slope 2;

[0014] When the vehicle is traveling on steep slope 2, the motor power is at its maximum and the battery discharge rate is at its maximum. The motor battery thermostat receives information from the battery management system and corrects the execution unit control parameters according to the current battery charge and discharge rate. The correction factor is x5, and the execution unit speed reaches the maximum.

[0015] Preferably, when the vehicle is about to enter a gentle slope 1 from a flat road, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives the information sent by the Internet of Vehicles map and the battery management system, and judges the battery charge and discharge rate according to the road slope and slope length of the next stage, and corrects the execution unit control parameters in advance, the correction coefficient is x2, and the execution unit speed increases;

[0016] When the vehicle enters gentle slope 2 from a flat road or gentle slope 1, the motor power increases, the battery discharge rate increases, and the motor battery thermostat receives information sent by the Internet of Vehicles map and the battery management system. According to the road slope and slope length of the next stage, the battery charge and discharge rate is determined, and the control parameters of the execution unit are corrected in advance. The correction coefficient is x3, and the speed of the execution unit increases;

[0017] When the vehicle is about to enter steep slope 1 from a flat road or gentle slope 1 or gentle slope 2, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives the information sent by the Internet of Vehicles map and the battery management system, and judges the battery charge and discharge rate according to the road slope and slope length of the next stage, and corrects the control parameters of the execution unit in advance, the correction coefficient is x4, and the execution unit speed increases;

[0018] When the vehicle is about to enter steep slope 2 from a flat road or gentle slope 1 or gentle slope 2 or steep slope 1, the motor power will be maximum and the battery discharge rate will be maximum. The motor battery thermostat receives information from the Internet of Vehicles map and the battery management system, and determines the battery charge and discharge rate based on the road slope and slope length in the next stage. The control parameters of the execution unit are corrected in advance with a correction coefficient of x5, and the execution unit speed is at its highest.

[0019] Preferably, when the vehicle is about to enter steep slope 1 from steep slope 2, the motor power will decrease, and the battery charging rate will decrease accordingly. The motor battery thermostat receives the information sent by the Internet of Vehicles map and the battery management system, and judges the battery charging and discharging rate according to the road slope and slope length of the next stage, and corrects the control parameters of the execution unit in advance, with a correction coefficient of x4, and the execution unit speed is reduced;

[0020] When the vehicle is about to enter gentle slope 2 from steep slope 2 or steep slope 1, the motor power will decrease, and the battery charging rate will decrease accordingly. The motor battery thermostat receives information sent by the Internet of Vehicles map and the battery management system, and determines the battery charging and discharging rate according to the road slope and slope length of the next stage, and corrects the control parameters of the execution unit in advance. The correction coefficient is x3, and the execution unit speed is reduced;

[0021] When the vehicle is about to enter gentle slope 1 from steep slope 2 or steep slope 1 or gentle slope 2, the motor power will decrease, and the battery charging rate will decrease accordingly. The motor battery thermostat receives the information sent by the Internet of Vehicles map and the battery management system, and determines the battery charging and discharging rate according to the road slope and slope length of the next stage, and corrects the control parameters of the execution unit in advance, with a correction coefficient of x2, and the execution unit speed is reduced;

[0022] When the vehicle is about to enter a flat road from steep slope 2 or steep slope 1 or gentle slope 2 or gentle slope 1, the motor power is minimum, the battery charging rate is minimum, the motor battery thermostat receives information sent by the Internet of Vehicles map and the battery management system, and judges the battery charging and discharging rate according to the road slope and slope length in the next stage, and corrects the control parameters of the execution unit in advance, with a correction coefficient of x1, and the execution unit speed is minimum.

[0023] A predictive vehicle thermal management control system includes an information input unit, a control unit and an execution unit. The information input unit sends road information, driving information and battery charging and discharging current to the control unit. The control unit is used to process the information input by the information input unit and control the execution unit to operate. The execution unit operates according to the instructions sent by the control unit.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. Under the premise of meeting the most stringent working conditions, the vehicle driving road information and battery charge and discharge rate are obtained according to the map and battery charge and discharge current information imported from the Internet of Vehicles, and the correction coefficient related to the road slope and slope length, as well as the correction coefficient related to the battery charge and discharge rate are formulated. On this basis, the control parameters of the actuators are corrected to control the reasonable operation of the actuators to meet the motor and battery temperatures and reduce the energy consumption of the thermal management system;

[0026] 2. Since the map can provide the user with a driving route, the present invention can obtain the road slope and slope length of the next stage of the driving process in advance according to the driving route, so as to correct the actuator control parameters in advance, so that the coolant temperature can be quickly adjusted to the target temperature, better control the motor and battery temperature, and improve the system heat dissipation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the principle of the predictive vehicle thermal management control system of the present invention. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The present invention provides a predictive whole vehicle thermal management control method. During design, the thermal management control system is calibrated according to the most severe working conditions, and the vehicle is continuously charged and discharged according to the peak charge and discharge rates. On the premise of meeting the system heat dissipation requirements under the most severe working conditions, the execution unit control parameters are corrected according to the actual charge and discharge rates of the battery. When the vehicle is driving, the driving route and road information provided to the user by the Internet of Vehicles map is used to correct the execution unit control parameters in advance, so that the coolant temperature reaches the target value, and the motor and battery temperatures are adjusted.

[0032] Among them, it includes an information input unit, a control unit and an execution unit. The information input unit sends road information, driving information and battery charging and discharging current to the control unit. The control unit is used to process the information input by the information input unit and control the operation of the execution unit. The execution unit runs according to the instructions sent by the control unit.

[0033] Specifically, the information input unit includes a vehicle network map and a battery management system. The road information and driving information are provided by the vehicle network map, including the road surface altitude at different times. The driving information includes the driving route of the next stage and the corresponding road surface information. The battery charging and discharging current is provided by the battery management system. The control unit includes a motor battery thermostat, which obtains the road slope and slope length according to the current and next stage road surface altitudes, obtains the battery charging and discharging rate according to the battery charging and discharging current, and then determines the correction coefficient of the execution unit control parameter according to the road slope and slope length and the battery charging and discharging rate, and sends the corrected control parameter to the execution unit to control the operation of the execution unit. The execution unit includes an electronic fan, an electronic water pump, and an air-conditioning compressor. Through the reasonable operation of the execution unit, the coolant temperature is adjusted to control the motor and battery temperature.

[0034] In the method, the battery management system provides the battery charge and discharge current at different times, and converts the battery charge and discharge rate according to the current capacity of the battery, as shown in Table 1. When 0<charge and discharge rate≤C1, the correction coefficient is 0<x1<1; when C1<charge and discharge rate≤C2, the correction coefficient is 0<x2<1; when C2<charge and discharge rate≤C3, the correction coefficient is 0<x3<1; when C3<charge and discharge rate≤C4, the correction coefficient is 0<x4<1; when C4<charge and discharge rate≤C5, the correction coefficient x5=1, 0<x1<x2<x3<x4<x5=1, and the specific values ​​of the charge and discharge rate and the corresponding correction coefficient are determined by calibration.

[0035] Table 1 Comparison table of charge and discharge rate and correction coefficient

[0036]

[0037]

[0038] The Internet of Vehicles map provides users with driving routes and corresponding ground altitudes. According to the ground altitude at different times, the ground slope and slope length are converted, as shown in Table 2. When 0≤slope<P1, it is considered a flat road, corresponding to 0<charge and discharge rate≤C1, and the correction coefficient is 0<x1<1; when P1≤slope<P2, it is considered a gentle slope 1, corresponding to C1<charge and discharge rate≤C2, and the correction coefficient is 0<x2<1; when P2≤slope<P3, it is considered a gentle slope 2, corresponding to C2<charge and discharge rate≤C3, correction coefficient 0<x3<1; when P3≤slope<P4, it is regarded as steep slope 1, corresponding to C3<charge and discharge rate≤C4, correction coefficient 0<x4<1; when P4≤slope≤P5, it is regarded as steep slope 2, corresponding to C4<charge and discharge rate≤C5, correction coefficient x5=1, 0<x1<x2<x3<x4<x5=1, the specific values ​​of slope threshold, charge and discharge rate and correction coefficient are determined through calibration.

[0039] Table 2 Comparison table of road types and correction coefficients

[0040] Road Type slope Charge and discharge rate Correction factor Flat Road 0≤Slope<P1 0<Charge and discharge rate≤C1 0＜x1＜1 Gentle slope 1 P1≤slope<P2 C1<Charge and discharge rate≤C2 0＜x2＜1 Slope 2 P2≤Slope<P3 C2<Charge and discharge rate≤C3 0＜x3＜1 Steep slope 1 P3≤slope<P4 C3<Charge and discharge rate≤C4 0＜x4＜1 Steep Slope 2 P4≤slope≤P5 C4<Charge and discharge rate≤C5 x5＝1

[0041] Specifically, when the vehicle is traveling on a flat road, the motor power is relatively small, the battery discharge rate is small, and the motor battery thermostat receives information sent by the battery management system and corrects the execution unit control parameters according to the current battery charge and discharge rate. The correction coefficient is x1, and the execution unit speed is the lowest.

[0042] When the vehicle is driving on a gentle slope 1, compared with driving on a flat road, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives information sent by the battery management system, and corrects the execution unit control parameters according to the current battery charge and discharge rate, the correction factor is x2, and the execution unit speed increases compared with driving on a flat road;

[0043] When the vehicle is traveling on gentle slope 2, compared with gentle slope 1, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives the information sent by the battery management system, and corrects the execution unit control parameters according to the current battery charge and discharge rate, the correction factor is x3, and the execution unit speed increases compared with gentle slope 1;

[0044] When the vehicle is traveling on steep slope 1, compared with gentle slope 2, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives the information sent by the battery management system, and corrects the execution unit control parameters according to the current battery charge and discharge rate, the correction factor is x4, and the execution unit speed increases compared with gentle slope 2;

[0045] When the vehicle is traveling on steep slope 2, the motor power is at its maximum and the battery discharge rate is at its maximum. The motor battery thermostat receives information from the battery management system and corrects the execution unit control parameters according to the current battery charge and discharge rate. The correction factor is x5, and the execution unit speed reaches the maximum.

[0046] When the vehicle is about to enter a gentle slope 1 from a flat road, the motor power increases, the battery discharge rate increases, and the motor battery thermostat receives information from the Internet of Vehicles map and the battery management system. According to the road slope and slope length of the next stage, the battery charge and discharge rate is determined, and the control parameters of the execution unit are corrected in advance. The correction coefficient is x2, and the speed of the execution unit increases;

[0047] When the vehicle enters gentle slope 2 from a flat road or gentle slope 1, the motor power increases, the battery discharge rate increases, and the motor battery thermostat receives information sent by the Internet of Vehicles map and the battery management system. According to the road slope and slope length of the next stage, the battery charge and discharge rate is determined, and the control parameters of the execution unit are corrected in advance. The correction coefficient is x3, and the speed of the execution unit increases;

[0048] When the vehicle is about to enter steep slope 1 from a flat road or gentle slope 1 or gentle slope 2, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives the information sent by the Internet of Vehicles map and the battery management system, and judges the battery charge and discharge rate according to the road slope and slope length of the next stage, and corrects the control parameters of the execution unit in advance, the correction coefficient is x4, and the execution unit speed increases;

[0049] When the vehicle is about to enter steep slope 2 from a flat road or gentle slope 1 or gentle slope 2 or steep slope 1, the motor power will be maximum and the battery discharge rate will be maximum. The motor battery thermostat receives information from the Internet of Vehicles map and the battery management system, and determines the battery charge and discharge rate based on the road slope and slope length in the next stage. The control parameters of the execution unit are corrected in advance with a correction coefficient of x5, and the execution unit speed is at its highest.

[0050] When the vehicle is about to enter steep slope 1 from steep slope 2, the motor power will decrease, and the battery charging rate will decrease accordingly. The motor battery thermostat receives information sent by the Internet of Vehicles map and the battery management system, and determines the battery charging and discharging rate according to the road slope and slope length of the next stage, and corrects the control parameters of the execution unit in advance. The correction coefficient is x4, and the execution unit speed is reduced;

[0051] When the vehicle is about to enter gentle slope 2 from steep slope 2 or steep slope 1, the motor power will decrease, and the battery charging rate will decrease accordingly. The motor battery thermostat receives information sent by the Internet of Vehicles map and the battery management system, and determines the battery charging and discharging rate according to the road slope and slope length of the next stage, and corrects the control parameters of the execution unit in advance. The correction coefficient is x3, and the execution unit speed is reduced;

[0052] When the vehicle is about to enter gentle slope 1 from steep slope 2 or steep slope 1 or gentle slope 2, the motor power will decrease, and the battery charging rate will decrease accordingly. The motor battery thermostat receives the information sent by the Internet of Vehicles map and the battery management system, and determines the battery charging and discharging rate according to the road slope and slope length of the next stage, and corrects the control parameters of the execution unit in advance, with a correction coefficient of x2, and the execution unit speed is reduced;

[0053] When the vehicle is about to enter a flat road from steep slope 2 or steep slope 1 or gentle slope 2 or gentle slope 1, the motor power is minimum, the battery charging rate is minimum, the motor battery thermostat receives information sent by the Internet of Vehicles map and the battery management system, and judges the battery charging and discharging rate according to the road slope and slope length in the next stage, and corrects the control parameters of the execution unit in advance, with a correction coefficient of x1, and the execution unit speed is minimum.

[0054] like Figure 1As shown, a predictive vehicle thermal management control system includes an information input unit, a control unit and an execution unit. The information input unit sends road information, driving information and battery charging and discharging current to the control unit. The control unit is used to process the information input by the information input unit and control the execution unit to run. The execution unit runs according to the instructions sent by the control unit.

[0055] Among them, the information input unit includes a vehicle network map and a battery management system. The road information and driving information are provided by the vehicle network map, including the road surface altitude at different times. The driving information includes the driving route of the next stage and the corresponding road surface information. The battery charging and discharging current is provided by the battery management system. The control unit includes a motor battery thermostat, which obtains the road slope and slope length according to the current and next stage road surface altitudes, obtains the battery charging and discharging rate according to the battery charging and discharging current, and then determines the correction coefficient of the execution unit control parameter according to the road slope and slope length and the battery charging and discharging rate, and sends the corrected control parameters to the execution unit to control the operation of the execution unit. The execution unit includes an electronic fan, an electronic water pump, and an air-conditioning compressor. Through the reasonable operation of the execution unit, the coolant temperature is adjusted to control the motor and battery temperature.

[0056] It should be noted that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be interpreted as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solutions of the present invention are limited only by the scope of the claims.

[0057] The various aspects disclosed for describing the present specification and claims are merely examples, and therefore, the present specification and claims are not limited to the details shown. In the above description, when the detailed description of the related known functions or configurations is determined to be unnecessary to obscure the focus of the present specification and claims, the detailed description will be omitted.

[0058] In the case of using “including”, “having” and “comprising” described in the present specification, unless otherwise used, there may also be another part or other parts, and the terms used may generally be in the singular but may also represent the plural form.

[0059] Finally, it should be pointed out that the above content is a further detailed description of the invention in combination with specific implementation methods. It cannot be considered that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, simple replacements made without departing from the concept of the present invention should be regarded as belonging to the protection scope of the present invention. The above embodiments are only more representative examples of the present invention. Obviously, the present invention is not limited to the above embodiments, and there can be many variations. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention should be considered to belong to the protection scope of the present invention.

[0060] At the same time, it should be noted that the description of the above technical solutions is exemplary, and this specification can be embodied in different forms and should not be construed as being limited to the technical solutions set forth herein. On the contrary, providing these descriptions will make the disclosure of the present invention thorough and complete, and will fully convey the scope disclosed in this specification to those skilled in the art. In addition, the technical solutions of the present invention are limited only by the scope of the claims. The features of the various embodiments of the present invention may be partially or completely combined or spliced ​​with each other, and may be performed in various different configurations as those skilled in the art may fully understand. The embodiments of the present invention may be performed independently of each other, or may be performed together in a mutually dependent relationship.

[0061] For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, and the above structures should be regarded as belonging to the protection scope of the present invention.

Claims

1. A predictive vehicle thermal management control method, characterized in that: During the design, the thermal management control system is calibrated according to the most stringent operating conditions, and the vehicle is continuously charged and discharged at the peak charge and discharge rates. On the premise of meeting the system heat dissipation requirements under the most stringent operating conditions, the control parameters of the execution unit are corrected according to the actual charge and discharge rates of the battery. When the vehicle is driving, the driving route and road information provided to the user by the Internet of Vehicles map is used to correct the control parameters of the execution unit in advance, so that the coolant temperature reaches the target value and the motor and battery temperature are adjusted.

2. The predictive vehicle thermal management control method according to claim 1 is characterized in that: It includes an information input unit, a control unit and an execution unit. The information input unit sends road information, driving information and battery charging and discharging current to the control unit. The control unit is used to process the information input by the information input unit and control the execution unit to run. The execution unit runs according to the instructions sent by the control unit.

3. The predictive vehicle thermal management control method according to claim 2 is characterized in that: The information input unit includes a vehicle networking map and a battery management system. The road information and driving information are provided by the vehicle networking map, including the road surface altitude at different times. The driving information includes the driving route of the next stage and the corresponding road surface information. The battery charging and discharging current is provided by the battery management system. The control unit includes a motor battery thermostat, which obtains the road slope and slope length according to the current and next stage road surface altitudes, obtains the battery charging and discharging rate according to the battery charging and discharging current, and then determines the correction coefficient of the execution unit control parameter according to the road slope and slope length and the battery charging and discharging rate, and sends the corrected control parameter to the execution unit to control the operation of the execution unit. The execution unit includes an electronic fan, an electronic water pump, and an air-conditioning compressor. Through the reasonable operation of the execution unit, the coolant temperature is adjusted to control the motor and battery temperature.

4. The predictive vehicle thermal management control method according to claim 3 is characterized in that: The battery management system provides the battery charge and discharge current at different times, and converts the battery charge and discharge rate according to the current battery capacity. When 0<charge and discharge rate ≤ C1, the correction coefficient is 0<x1<1; when C1<charge and discharge rate ≤ C2, the correction coefficient is 0<x2<1; when C2<charge and discharge rate ≤ C3, the correction coefficient is 0<x3<1; when C3<charge and discharge rate ≤ C4, the correction coefficient is 0<x4<1; when C4<charge and discharge rate ≤ C5, the correction coefficient x5=1, 0<x1<x2<x3<x4<x5 =1, and the specific values ​​of the charge and discharge rate and the corresponding correction coefficient are determined through calibration.

5. The predictive vehicle thermal management control method according to claim 4 is characterized in that: The Internet of Vehicles map provides users with driving routes and corresponding ground altitudes. According to the ground altitude at different times, the ground slope and slope length are converted. When 0≤slope<P1, it is regarded as a flat road, corresponding to 0<charge and discharge rate≤C1, and the correction coefficient is 0<x1<1; when P1≤slope<P2, it is regarded as a gentle slope 1, corresponding to C1<charge and discharge rate≤C2, and the correction coefficient is 0<x2<1; when P2≤slope<P3, it is regarded as a gentle slope 2, corresponding to C2<charge and discharge rate≤C3, and the correction coefficient is 0<x3<1; when P3≤slope<P4, it is regarded as a steep slope 1, corresponding to C3<charge and discharge rate≤C4, and the correction coefficient is 0<x4<1; when P4≤slope≤P5, it is regarded as a steep slope 2, corresponding to C4<charge and discharge rate≤C5, and the correction coefficient is x5 =1, 0<x1<x2<x3<x4<x5 =1, and the specific values ​​of the slope threshold, charge and discharge rate and correction coefficient are determined through calibration.

6. The predictive vehicle thermal management control method according to claim 5 is characterized in that: When the vehicle is driving on a flat road, the motor power is relatively small and the battery discharge rate is small. The motor battery thermostat receives information from the battery management system and corrects the execution unit control parameters according to the current battery charge and discharge rate. The correction coefficient is x1 and the execution unit speed is the lowest.

7. The predictive vehicle thermal management control method according to claim 5 is characterized in that: When the vehicle is driving on a gentle slope 1, compared with driving on a flat road, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives information sent by the battery management system, and corrects the execution unit control parameters according to the current battery charge and discharge rate, the correction factor is x2, and the execution unit speed increases compared with driving on a flat road; When the vehicle is traveling on gentle slope 2, compared with gentle slope 1, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives the information sent by the battery management system, and corrects the execution unit control parameters according to the current battery charge and discharge rate, the correction factor is x3, and the execution unit speed increases compared with gentle slope 1; When the vehicle is traveling on steep slope 1, compared with gentle slope 2, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives the information sent by the battery management system, and corrects the execution unit control parameters according to the current battery charge and discharge rate, the correction factor is x4, and the execution unit speed increases compared with gentle slope 2; When the vehicle is traveling on steep slope 2, the motor power is at its maximum and the battery discharge rate is at its maximum. The motor battery thermostat receives information from the battery management system and corrects the execution unit control parameters according to the current battery charge and discharge rate. The correction factor is x5, and the execution unit speed reaches the maximum.

8. The predictive vehicle thermal management control method according to claim 5 is characterized in that: When the vehicle is about to enter a gentle slope 1 from a flat road, the motor power increases, the battery discharge rate increases, and the motor battery thermostat receives information from the Internet of Vehicles map and the battery management system. According to the road slope and slope length of the next stage, the battery charge and discharge rate is determined, and the control parameters of the execution unit are corrected in advance. The correction coefficient is x2, and the speed of the execution unit increases; When the vehicle enters gentle slope 2 from a flat road or gentle slope 1, the motor power increases, the battery discharge rate increases, and the motor battery thermostat receives information sent by the Internet of Vehicles map and the battery management system. According to the road slope and slope length of the next stage, the battery charge and discharge rate is determined, and the control parameters of the execution unit are corrected in advance. The correction coefficient is x3, and the speed of the execution unit increases; When the vehicle is about to enter steep slope 1 from a flat road or gentle slope 1 or gentle slope 2, the motor power increases, the battery discharge rate increases, the motor battery thermostat receives the information sent by the Internet of Vehicles map and the battery management system, and judges the battery charge and discharge rate according to the road slope and slope length of the next stage, and corrects the control parameters of the execution unit in advance, the correction coefficient is x4, and the execution unit speed increases; When the vehicle is about to enter steep slope 2 from a flat road or gentle slope 1 or gentle slope 2 or steep slope 1, the motor power will be maximum and the battery discharge rate will be maximum. The motor battery thermostat receives information from the Internet of Vehicles map and the battery management system, and determines the battery charge and discharge rate based on the road slope and slope length in the next stage. The control parameters of the execution unit are corrected in advance with a correction coefficient of x5, and the execution unit speed is at its highest.

9. The predictive vehicle thermal management control method according to claim 5 is characterized in that: When the vehicle is about to enter steep slope 1 from steep slope 2, the motor power will decrease, and the battery charging rate will decrease accordingly. The motor battery thermostat receives information sent by the Internet of Vehicles map and the battery management system, and determines the battery charging and discharging rate according to the road slope and slope length of the next stage, and corrects the control parameters of the execution unit in advance. The correction coefficient is x4, and the execution unit speed is reduced; When the vehicle is about to enter gentle slope 2 from steep slope 2 or steep slope 1, the motor power will decrease, and the battery charging rate will decrease accordingly. The motor battery thermostat receives information sent by the Internet of Vehicles map and the battery management system, and determines the battery charging and discharging rate according to the road slope and slope length of the next stage, and corrects the control parameters of the execution unit in advance. The correction coefficient is x3, and the execution unit speed is reduced; When the vehicle is about to enter gentle slope 1 from steep slope 2 or steep slope 1 or gentle slope 2, the motor power will decrease, and the battery charging rate will decrease accordingly. The motor battery thermostat receives the information sent by the Internet of Vehicles map and the battery management system, and determines the battery charging and discharging rate according to the road slope and slope length of the next stage, and corrects the control parameters of the execution unit in advance, with a correction coefficient of x2, and the execution unit speed is reduced; When the vehicle is about to enter a flat road from steep slope 2 or steep slope 1 or gentle slope 2 or gentle slope 1, the motor power is minimum, the battery charging rate is minimum, the motor battery thermostat receives information sent by the Internet of Vehicles map and the battery management system, and judges the battery charging and discharging rate according to the road slope and slope length in the next stage, and corrects the control parameters of the execution unit in advance, with a correction coefficient of x1, and the execution unit speed is minimum.

10. A predictive vehicle thermal management control system, characterized in that: It includes an information input unit, a control unit and an execution unit. The information input unit sends road information, driving information and battery charging and discharging current to the control unit. The control unit is used to process the information input by the information input unit, and control the execution unit to run according to the predictive vehicle thermal management control method as claimed in claim 1. The execution unit runs according to the instructions sent by the control unit.

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