Electric vehicle front end air inlet control system, method and equipment and storage medium

Abstract

The invention discloses an electric vehicle front end air inlet control system, method and device and a storage medium, and belongs to the technical field of automobile control, the electric vehicle front end air inlet control system comprises a VCU, an electric drive water circulation loop, a battery water circulation loop, a warm air loop, an air conditioner refrigeration loop and an active grating; the electric water circulation loop is connected with the battery water circulation loop through a five-way valve, the battery water circulation loop is connected with the warm air loop through a three-way valve, and the electric water circulation loop is connected with the air conditioner refrigeration loop through Chiller; the VCU is connected with the five-way valve, the three-way valve, the motor water pump, the electric drive system and the battery water pump, the on-off condition of the three-way valve and the five-way valve is controlled according to the environment temperature, the battery cell temperature and the vehicle speed, the electric drive water circulation loop and the battery water circulation loop are connected in series, and heat generated by the power motor is used for heating a battery. According to the control method, the target system is rapidly established, the steady state quantity in the system is fully utilized as the reference, the electric energy consumption of the thermal system is reduced, and the endurance mileage of the whole vehicle is correspondingly increased.

Description

Technical Field

[0001] The present invention belongs to the field of automobile control technology, and in particular relates to a control system, method, device and storage medium for front-end air intake of an electric vehicle. Background Art

[0002] As the sales of electric vehicles increase, the energy consumption of new energy vehicles has attracted widespread attention in the industry. Active grilles and brushless high-power PWM fans are widely used in the front-end cooling design of vehicles. There are two main ways to control the front-end air intake:

[0003] The first one: The cooling fan request is the dominant factor, and the active grille is opened and closed according to demand.

[0004] The development and application goal is to reduce the wind resistance of the vehicle through active grille control at the front end of the vehicle. The development end is dominated by the application of the grille structure. The control method is to judge the opening control of the active grille through fan request analysis, and realize the front end air intake design of the vehicle by pre-setting the switch delay relationship between the fan and the active grille.

[0005] Existing problems: The active grille development control is associated with the fan switch, covering the vehicle thermal system requirements, corresponding to low wind resistance conditions, the system control vehicle wind resistance control requirements are not fully covered, and the front active grille does not fully play the role of the parts;

[0006] The second type: The active grille is set to open or close based on vehicle speed, and the grille and vehicle speed are calibrated based on wind resistance adjustment. Generally, two or three gears are set on the vehicle to control the grille opening. The fan is activated by the cooling system and air conditioning system, and passively accepts the air intake state of the front active grille as the system working input condition. Other parts of the thermal system achieve system goals through their own power. After the calibration work is completed during the development process, there is no correlation between the operation process of the fan and the grille during the vehicle operation.

[0007] Existing problems: The front-end air intake design is mainly based on the vehicle speed, and the thermal system passively accepts the front-end input working conditions to carry out power adjustment. There is a lack of system feedback control process, resulting in incomplete system design coverage, unreasonable thermal system energy consumption, and even insufficient thermal system capacity under extreme thermal system conditions, such as the high temperature and low temperature conditions in Xinjiang Gangou (ambient temperature greater than 45°C, mountain valley, 20-30km / h climbing a 28km long slope).

[0008] In summary, the above two methods both carry out front-end air intake control based on a certain demand of the vehicle, and fail to achieve reasonable system operation control for the energy consumption of the thermal system of new energy vehicles. Summary of the invention

[0009] In view of the above-mentioned defects existing in the prior art, the present invention provides a control method, system, device and storage medium for the front-end air intake of electric vehicles, which are applied to pure electric passenger vehicle platform models. The present invention optimizes the control system for front-end air intake configuration platform models equipped with active grille air intake and PWM control fan, solves the contradiction between the imprecise matching of front-end air intake and thermal system requirements, improves the adaptability of the thermal system to extreme working conditions, and effectively reduces the energy consumption of the thermal system of pure electric vehicles. The control method of the present invention is based on the rapid establishment of the target system and the full use of the steady-state state quantity in the system, thereby reducing the power consumption of the thermal system and correspondingly improving the vehicle's cruising range.

[0010] The present invention is achieved through the following technical solutions:

[0011] In a first aspect, the present invention provides a control system for front-end air intake of an electric vehicle, comprising: a VCU, an electric drive water circulation loop, a battery water circulation loop, a heating air circuit, an air conditioning refrigeration circuit, and an active grille;

[0012] The electric drive water circulation loop includes a power motor, a motor water pump, a water temperature sensor and a radiator;

[0013] The battery water circulation loop includes a battery water pump, a water temperature sensor, a battery, a water-to-water heat exchanger and a chiller;

[0014] The heating circuit includes a heating core, a heating water pump, a water temperature sensor, a water-to-water heat exchanger and a PTC;

[0015] The air conditioning refrigeration circuit includes a compressor, a pressure sensor, an evaporator, a chiller and a condenser;

[0016] The electric drive water circulation loop is connected to the battery water circulation loop through a five-way valve, the battery water circulation loop is connected to the warm air circuit through a three-way valve, and the electric drive water circulation loop is connected to the air conditioning refrigeration circuit through a Chiller;

[0017] The VCU is respectively connected to the five-way valve, the three-way valve, the motor water pump, the electric drive system, and the battery water pump, and controls the on-off status of the three-way valve and the five-way valve according to the ambient temperature, the battery cell temperature, and the vehicle speed, so that the electric drive water circulation loop and the battery water circulation loop are connected in series, and the heat generated by the power motor is used to heat the battery.

[0018] Furthermore, the warm air circuit also includes an expansion tank, which is connected to the PTC.

[0019] Furthermore, the electric drive water circulation loop also includes an expansion water tank, which is connected to the radiator.

[0020] Furthermore, the inlet of the five-way valve is connected to the radiator, the motor water pump and the cooler respectively, and the outlet is connected to the water temperature sensor and the battery water pump respectively.

[0021] Furthermore, the inlet of the three-way valve is connected to the PTC, and the outlet is connected to the water-to-water heat exchanger and the heater core respectively.

[0022] In a second aspect, the present invention provides a control method for a control system of a front-end air intake of an electric vehicle, which specifically comprises the following steps:

[0023] Step 1: When the vehicle is in winter low-temperature driving or charging conditions, the VCU determines whether to close the active grille based on the ambient temperature. When the ambient temperature is ≤A℃, the active grille is closed for heat preservation, the fan does not run, and the PTC generates heat to heat the heater core and the battery through the heater circuit and the battery water circulation circuit;

[0024] Step 2: When the vehicle is in high-temperature driving or charging conditions in summer, the VCU monitors the temperature of the electric drive water circulation loop and the vehicle speed according to the actual vehicle to determine whether to enter the electric drive cooling mode. If so, the heat generated by the electric drive is exchanged with the outside through the electric drive water circulation loop;

[0025] Step 3: When the vehicle is in high-temperature driving or charging conditions in summer, the VCU monitors the battery temperature and air-conditioning system pressure according to the actual vehicle to determine whether to enter the battery cooling mode. If so, the cooling capacity generated by the compressor is used to cool the passenger compartment and the battery through the air-conditioning circuit and the battery water circulation circuit.

[0026] Furthermore, in step 2, when any of the following conditions is met, the electric drive cooling mode is entered:

[0027] 1) Motor water circulation temperature ≥ a℃;

[0028] 2)T_amb≥b℃ and vehicle speed≤ckm / h.

[0029] Further, in step 2, when the motor water circuit circulation temperature is ≥ f°C, all active grilles are opened;

[0030] When the motor water circulation temperature is ≥g℃, where g>f, the fan starts running, and the speed gradually increases as the motor water circulation temperature increases;

[0031] When the motor water circulation temperature is ≥h℃, the fan runs at full speed.

[0032] Furthermore, in step 2, if the following conditions are met at the same time, the active grille mode is exited:

[0033] 1) Motor water circulation temperature ≤ j℃;

[0034] 2)T_amb≤k℃ or vehicle speed≥lkm / h.

[0035] Furthermore, before exiting the active grille mode, when the motor water circulation temperature is ≤m°C and m>j, the fan stops running, which can reduce the power consumption of the fan and other components, while reducing driving resistance and allowing the vehicle to maintain economical driving.

[0036] Furthermore, in step 3, when any of the following conditions is met, the battery cooling mode or the air conditioning cooling mode is entered:

[0037] 1) When the vehicle speed is ≤ b1km / h, the active grille is opened and the opening is 100%; when the air conditioning system pressure is ≥ b2MPa, the fan is turned on and the speed gradually increases as the air conditioning system pressure increases; when the air conditioning system pressure is ≥ b3MPa, the fan runs at full speed;

[0038] When the air conditioning system pressure is ≤ b4MPa, where b4<b3, the fan stops running at full speed, and the speed gradually decreases as the air conditioning system pressure decreases. When the air conditioning system pressure is ≤ b5MPa, where b5<b2, the fan stops running.

[0039] 2) When the vehicle speed is greater than b1km / h, the active grille opens, and the opening gradually increases with the increase of the air-conditioning system pressure. When the air-conditioning system pressure is ≥ b3MPa, the opening is 100% and the fan stops running.

[0040] In a third aspect, the present invention further provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a method for controlling the front end air intake of an electric vehicle as described in any one of the present invention is implemented.

[0041] In a fourth aspect, the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a method for controlling the front air intake of an electric vehicle as described in any one of the present inventions.

[0042] Compared with the prior art, the advantages of the present invention are as follows:

[0043] 1. A control method, system, device and storage medium for the front-end air intake of an electric vehicle of the present invention uses an active grille and a PWM fan configured in the front-end cooling module of the electric vehicle as a carrier, controls the opening of the active grille and the air volume of the fan at the same time, and conducts a real vehicle calibration test in combination with typical working conditions, thereby reducing the workload of electrical components such as PTC, compressor and fan in the thermal system, realizing effective energy-saving control of the thermal system, and realizing energy saving of the system by more than 15%;

[0044] 2. Optimize the energy consumption of the thermal system with the goal of controlling the heat exchange rate of the front-end cooling module, reduce the workload and time of high-power devices such as PTC, compressor, and water pump in the thermal system, reduce the volatility of thermal system control, improve the working stability of the power system, and improve the air conditioning quality in the passenger compartment;

[0045] 3. By matching the control of the front-end air intake extreme conditions and typical conditions, the problem of electric vehicles’ extreme adaptability to high and low temperatures can be solved to ensure the safe operation of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0047] Figure 1 This is a structural block diagram of a control system for front-end air intake of an electric vehicle according to the present invention;

[0048] Figure 2 A schematic diagram of the control principle of a control system for front-end air intake of an electric vehicle according to the present invention;

[0049] Figure 3 It is a flow chart of a method for controlling air intake at the front end of an electric vehicle according to the present invention;

[0050] Figure 4 This is a schematic diagram of the structure of an electronic device in Example 3 of the present invention. DETAILED DESCRIPTION

[0051] In order to clearly and completely describe the technical solution and its specific working process of the present invention, the specific implementation methods of the present invention are as follows in conjunction with the accompanying drawings of the specification:

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0055] Example 1

[0056] like Figure 1 As shown, this embodiment provides a control system for the front air intake of an electric vehicle, including: a VCU, an electric drive water circulation loop, a battery water circulation loop, a heating loop, an air conditioning refrigeration loop and an active grille;

[0057] The electric drive water circulation loop includes a power motor, a motor water pump, a water temperature sensor and a radiator;

[0058] The battery water circulation loop includes a battery water pump, a water temperature sensor, a battery, a water-to-water heat exchanger and a chiller;

[0059] The heating circuit includes a heating core, a heating water pump, a water temperature sensor, a water-to-water heat exchanger and a PTC;

[0060] The air conditioning refrigeration circuit includes a compressor, a pressure sensor, an evaporator, a chiller and a condenser;

[0061] The electric drive water circulation loop is connected to the battery water circulation loop through a five-way valve, the battery water circulation loop is connected to the warm air circuit through a three-way valve, and the electric drive water circulation loop is connected to the air conditioning refrigeration circuit through a Chiller;

[0062] The VCU is respectively connected to the five-way valve, the three-way valve, the motor water pump, the electric drive system, and the battery water pump, and controls the on-off status of the three-way valve and the five-way valve according to the ambient temperature, the battery cell temperature, and the vehicle speed, so that the electric drive water circulation loop and the battery water circulation loop are connected in series, and the heat generated by the power motor is used to heat the battery.

[0063] The warm air circuit also includes an expansion tank, which is connected to the PTC.

[0064] The electric drive water circulation loop also includes an expansion water tank, which is connected to the radiator.

[0065] The inlet of the five-way valve is connected to the radiator, the motor water pump and the cooler respectively, and the outlet is connected to the water temperature sensor and the battery water pump respectively.

[0066] The inlet of the three-way valve is connected to the PTC, and the outlet is connected to the water-to-water heat exchanger and the heater core respectively.

[0067] Example 2

[0068] This embodiment provides a control method for a control system of a front-end air intake of an electric vehicle, which specifically includes the following steps:

[0069] Step 1: When the vehicle is in winter low-temperature driving or charging conditions, the VCU determines whether to close the active grille based on the ambient temperature. When the ambient temperature is ≤A℃, the active grille is closed for heat preservation, the fan does not run, and the PTC generates heat to heat the heater core and the battery through the heater circuit and the battery water circulation circuit;

[0070] Step 2: When the vehicle is in high-temperature driving or charging conditions in summer, the VCU monitors the temperature of the electric drive water circulation loop and the vehicle speed according to the actual vehicle to determine whether to enter the electric drive cooling mode. If so, the heat generated by the electric drive is exchanged with the outside through the electric drive water circulation loop;

[0071] When any of the following conditions is met, the electric drive cooling mode is entered:

[0072] 1) Motor water circulation temperature ≥ a℃;

[0073] 2)T_amb≥b℃ and vehicle speed≤ckm / h.

[0074] When the motor water circulation temperature is ≥f℃, all active grilles are opened;

[0075] When the motor water circulation temperature is ≥g℃, where g>f, the fan starts running, and the speed gradually increases as the motor water circulation temperature increases;

[0076] When the motor water circulation temperature is ≥h℃, the fan runs at full speed.

[0077] If the following conditions are met at the same time, the active grille mode will be exited:

[0078] 1) Motor water circulation temperature ≤ j℃;

[0079] 2)T_amb≤k℃ or vehicle speed≥lkm / h.

[0080] Before exiting the active grille mode, when the motor water circulation temperature is ≤m℃ and m>j, the fan stops running, which can reduce the power consumption of the fan and other components, while reducing driving resistance and keeping the vehicle running economically.

[0081] Step 3: When the vehicle is in high-temperature driving or charging conditions in summer, the VCU monitors the battery temperature and air-conditioning system pressure according to the actual vehicle to determine whether to enter the battery cooling mode. If so, the cooling capacity generated by the compressor is used to cool the passenger compartment and the battery through the air-conditioning circuit and the battery water circulation circuit.

[0082] When any of the following conditions is met, the system enters battery cooling mode or air conditioning cooling mode:

[0083] 1) When the vehicle speed is ≤ b1km / h, the active grille is opened and the opening is 100%; when the air conditioning system pressure is ≥ b2MPa, the fan is turned on and the speed gradually increases as the air conditioning system pressure increases; when the air conditioning system pressure is ≥ b3MPa, the fan runs at full speed;

[0084] When the air conditioning system pressure is ≤ b4MPa, where b4<b3, the fan stops running at full speed, and the speed gradually decreases as the air conditioning system pressure decreases. When the air conditioning system pressure is ≤ b5MPa, where b5<b2, the fan stops running.

[0085] 2) When the vehicle speed is greater than b1km / h, the active grille opens, and the opening gradually increases with the increase of the air-conditioning system pressure. When the air-conditioning system pressure is ≥ b3MPa, the opening is 100% and the fan stops running.

[0086] In combination with the attached embodiment of the present invention, Figure 2 , a clear and complete description of the working mode in the embodiment of the present invention is given.

[0087] Working mode 1: When driving or charging in low temperatures in winter, the thermal management system turns off the active grille insulation, the fan does not run, and the water heating PTC is turned on according to the battery and heating needs, and the generated heat is efficiently transferred to the battery or heater core through the battery / heater water pump, so that the battery temperature rises rapidly or exchanges heat with the passenger compartment, reducing energy consumption.

[0088] Working mode 2: During the operation of the thermal management system, the motor water temperature has the following requirements for the opening of the front-end cooling module: 1) the motor water circuit circulation temperature ≥ a℃, 2) Tamb ≥ b℃ and the vehicle speed ≤ ckm / h. If any of the above conditions is met, the active grille is opened with an opening of d; the opening of the active grille is adjusted according to the change of the motor water circuit circulation temperature (there is a total of e gear). When the motor water circuit circulation temperature is ≥ f℃, all active grilles are opened; when the motor water circuit circulation temperature is ≥ g℃ (g>f), the fan is turned on and runs, and the speed gradually increases with the increase of the motor water circuit circulation temperature. When the motor water circuit circulation temperature is ≥ h℃, the fan runs at full speed; reduce the power consumption of the fan and other equipment, and at the same time reduce the driving resistance, so that the vehicle can maintain economical driving;

[0089] Working mode three: During the operation of the thermal management system, the motor water temperature has the following requirements for closing the front-end cooling module: 1) the motor water circuit circulation temperature ≤ j℃; 2) Tamb ≤ k℃ or the vehicle speed ≥ lkm / h. When the above conditions are met, the active grille is closed; before the active grille is closed, when the motor water circuit circulation temperature ≤ m℃ (m>j), the fan stops running; the power consumption of the fan is reduced, and the driving resistance is reduced, so that the vehicle can maintain economical driving;

[0090] Working mode 4: During the operation of the thermal management system, the air conditioning system has a requirement for opening the front-end cooling module: when the air conditioning has a cooling demand, the VCU simultaneously requests the compressor and the active air intake grille to open (fully open). After the active air intake grille is opened, the compressor is turned on after a delay of ns; the AC requests the cooling fan gear according to the air conditioning system pressure. When the air conditioning system pressure is ≥pMPa, the fan starts running, and the speed gradually increases as the air conditioning system pressure increases. When the air conditioning system pressure is ≥qMPa, the fan runs at full speed to reduce the power consumption of the fan, etc., so that the vehicle can maintain economical driving;

[0091] Working mode 5: During the operation of the thermal management system, other modes require the fan to run: when the VCU receives a request to turn on the fan, it also needs to send a request to actively open the grille. After the active grille is opened, the fan runs as required to meet the requirements as soon as possible and reduce energy consumption.

[0092] Example 3

[0093] Figure 4 This is a schematic diagram of the structure of a computer device in Example 3 of the present invention. Figure 4 A block diagram of an exemplary computer device 12 suitable for use in implementing embodiments of the present invention is shown. Figure 4 The computer device 12 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0094] like Figure 4As shown, the computer device 12 is in the form of a general-purpose computing device. The components of the computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that connects various system components (including the system memory 28 and the processing unit 16).

[0095] Bus 18 represents one or more of several types of bus structures, including a memory bus or memory controller, a peripheral bus, an accelerated graphics port, a processor or a local bus using any of a variety of bus architectures. By way of example, these architectures include, but are not limited to, an Industry Standard Architecture (ISA) bus, a Micro Channel Architecture (MAC) bus, an Enhanced ISA bus, a Video Electronics Standards Association (VESA) local bus, and a Peripheral Component Interconnect (PCI) bus.

[0096] The computer device 12 typically includes a variety of computer system readable media. These media can be any available media that can be accessed by the computer device 12, including volatile and non-volatile media, removable and non-removable media.

[0097] The system memory 28 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) 30 and / or cache memory 32. The computer device 12 may further include other removable / non-removable, volatile / non-volatile computer system storage media. By way of example only, the storage system 34 may be used to read and write non-removable, non-volatile magnetic media ( Figure 4 not shown, usually called a "hard drive"). Although Figure 4 Not shown in the figure, a disk drive for reading and writing to a removable non-volatile disk (e.g., a "floppy disk"), and an optical disk drive for reading and writing to a removable non-volatile optical disk (e.g., a CD-ROM, a DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to the bus 18 via one or more data medium interfaces. The memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to perform the functions of the various embodiments of the present invention.

[0098] A program / utility 40 having a set (at least one) of program modules 42 may be stored, for example, in the memory 28. Such program modules 42 include, but are not limited to, an operating system, one or more application programs, other program modules, and program data, each of which or some combination may include an implementation of a network environment. The program modules 42 generally perform the functions and / or methods of the embodiments described herein.

[0099] The computer device 12 may also communicate with one or more external devices 14 (e.g., keyboard, pointing device, display 24, etc.), may also communicate with one or more devices that enable a user to interact with the computer device 12, and / or communicate with any device that enables the computer device 12 to communicate with one or more other computing devices (e.g., network card, modem, etc.). Such communication may be performed through an input / output (I / O) interface 22. In addition, the computer device 12 in this embodiment, the display 24 does not exist as an independent individual, but is embedded in the mirror surface, and when the display surface of the display 24 is not displayed, the display surface of the display 24 and the mirror surface are visually integrated. In addition, the computer device 12 may also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN) and / or public network, such as the Internet) through a network adapter 20. As shown in the figure, the network adapter 20 communicates with other modules of the computer device 12 through a bus 18. It should be understood that although not shown in the figures, other hardware and / or software modules may be used in conjunction with the computer device 12, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0100] The processing unit 16 executes various functional applications and data processing by running the programs stored in the system memory 28, such as implementing a control method for the front air intake of an electric vehicle provided in an embodiment of the present invention.

[0101] Example 4

[0102] Embodiment 4 of the present invention provides a computer-readable storage medium on which a computer program is stored. When the program is executed by a processor, a method for controlling the front air intake of an electric vehicle as provided in all the embodiments of the present application is implemented.

[0103] Any combination of one or more computer-readable media may be used. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in conjunction with an instruction execution system, device, or device.

[0104] Computer-readable signal media may include a data signal propagated in baseband or as part of a carrier wave, which carries a computer-readable program code. Such propagated data signals may take a variety of forms, including, but not limited to, electromagnetic signals, optical signals, or any suitable combination of the above. Computer-readable signal media may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate, or transmit a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0105] Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

[0106] Computer program code for performing the operations of the present invention may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0107] Note that the above are only preferred embodiments of the present invention and the technical principles used. 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 scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A control system for the front air intake of an electric vehicle, characterized in that: include: VCU, electric drive water circulation loop, battery water circulation loop, heating loop, air conditioning refrigeration loop and active grille; The electric drive water circulation loop includes a power motor, a motor water pump, a water temperature sensor and a radiator; The battery water circulation loop includes a battery water pump, a water temperature sensor, a battery, a water-to-water heat exchanger and a chiller; The heating circuit includes a heating core, a heating water pump, a water temperature sensor, a water-to-water heat exchanger and a PTC; The air conditioning refrigeration circuit includes a compressor, a pressure sensor, an evaporator, a chiller and a condenser; The electric drive water circulation loop is connected to the battery water circulation loop through a five-way valve, the battery water circulation loop is connected to the warm air circuit through a three-way valve, and the electric drive water circulation loop is connected to the air conditioning refrigeration circuit through a Chiller; The VCU is respectively connected to the five-way valve, the three-way valve, the motor water pump, the electric drive system, and the battery water pump, and controls the on-off status of the three-way valve and the five-way valve according to the ambient temperature, the battery cell temperature, and the vehicle speed, so that the electric drive water circulation loop and the battery water circulation loop are connected in series, and the heat generated by the power motor is used to heat the battery.

2. A control system for front-end air intake of an electric vehicle as claimed in claim 1, characterized in that: The warm air circuit also includes an expansion tank, which is connected to the PTC.

3. The control system for front-end air intake of an electric vehicle as claimed in claim 1, characterized in that: The electric drive water circulation loop also includes an expansion water tank, which is connected to the radiator.

4. The control system for front air intake of an electric vehicle as claimed in claim 1, characterized in that: The inlet of the five-way valve is connected to the radiator, the motor water pump and the cooler respectively, and the outlet is connected to the water temperature sensor and the battery water pump respectively.

5. The electric vehicle front air intake control system according to claim 1, characterized in that: The inlet of the three-way valve is connected to the PTC, and the outlet is connected to the water-to-water heat exchanger and the heater core respectively.

6. The control method of the control system of the front air intake of an electric vehicle as claimed in claim 1, characterized in that: The specific steps include: Step 1: When the vehicle is in winter low-temperature driving or charging conditions, the VCU determines whether to close the active grille based on the ambient temperature. When the ambient temperature is ≤A℃, the active grille is closed for heat preservation, the fan does not run, and the PTC generates heat to heat the heater core and the battery through the heater circuit and the battery water circulation circuit; Step 2: When the vehicle is in high-temperature driving or charging conditions in summer, the VCU monitors the temperature of the electric drive water circulation loop and the vehicle speed according to the actual vehicle to determine whether to enter the electric drive cooling mode. If so, the heat generated by the electric drive is exchanged with the outside through the electric drive water circulation loop; Step 3: When the vehicle is in high-temperature driving or charging conditions in summer, the VCU monitors the battery temperature and air-conditioning system pressure according to the actual vehicle to determine whether to enter the battery cooling mode. If so, the cooling capacity generated by the compressor is used to cool the passenger compartment and the battery through the air-conditioning circuit and the battery water circulation circuit.

7. A method for controlling the front air intake of an electric vehicle as claimed in claim 6, characterized in that: In step 2, the electric drive cooling mode is entered when any of the following conditions are met: 1) Motor water circulation temperature ≥ a℃; 2)T_amb≥b℃ and vehicle speed≤ckm / h. Further, in step 2, when the motor water circuit circulation temperature is ≥ f°C, all active grilles are opened; When the motor water circulation temperature is ≥g℃, where g>f, the fan starts running, and the speed gradually increases as the motor water circulation temperature increases; When the motor water circulation temperature is ≥h℃, the fan runs at full speed.

8. A method for controlling the front air intake of an electric vehicle as claimed in claim 6, characterized in that: In step 2, if the following conditions are met at the same time, the active grille mode will be exited: 1) Motor water circulation temperature ≤ j℃; 2)T_amb≤k℃ or vehicle speed≥lkm / h.

9. A method for controlling the front air intake of an electric vehicle as claimed in claim 6, characterized in that: Before exiting the active grille mode, when the motor water circulation temperature is ≤m℃ and m>j, the fan stops running, which can reduce the power consumption of the fan and other components, while reducing driving resistance and keeping the vehicle running economically.

10. A method for controlling the front air intake of an electric vehicle as claimed in claim 6, characterized in that: In step 3, the battery cooling mode or air conditioning cooling mode is entered when any of the following conditions are met: 1) When the vehicle speed is ≤ b1km / h, the active grille is opened and the opening is 100%; when the air conditioning system pressure is ≥ b2MPa, the fan is turned on and the speed gradually increases as the air conditioning system pressure increases; when the air conditioning system pressure is ≥ b3MPa, the fan runs at full speed; When the air conditioning system pressure is ≤ b4MPa, where b4<b3, the fan stops running at full speed, and the speed gradually decreases as the air conditioning system pressure decreases. When the air conditioning system pressure is ≤ b5MPa, where b5<b2, the fan stops running. 2) When the vehicle speed is greater than b1km / h, the active grille opens, and the opening gradually increases with the increase of the air-conditioning system pressure. When the air-conditioning system pressure is ≥ b3MPa, the opening is 100% and the fan stops running.

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