WO2017211035A1

WO2017211035A1 - Method and device for controlling and managing power of range extended electric vehicle

Info

Publication number: WO2017211035A1
Application number: PCT/CN2016/102596
Authority: WO
Inventors: 王金龙; 易迪华; 秦兴权; 金硕; 崔天祥; 周金龙; 李从心
Original assignee: 北京新能源汽车股份有限公司
Priority date: 2016-06-08
Filing date: 2016-10-19
Publication date: 2017-12-14
Also published as: CN106080580B; CN106080580A

Abstract

A method for controlling and managing power of a range extended electric vehicle. The method comprises: acquiring a power requirement for car driving; computing, according to the power requirement, a target power of a driving motor (800), and controlling, according to the target power of the driving motor (800), the driving motor (800); acquiring a target battery power and a system power loss, and computing, according to the target battery power, the system power loss, and the target power of the driving motor (800), a target vehicle power; computing, according to the target vehicle power and a power loss of a range extender, a target power of the range extender; correcting, according to a power value of a battery power regulator, the target power of the range extender, to obtain a corrected target power value of the range extender; and controlling, according to the corrected target power value of the range extender, the range extender. Also provided are a device and vehicle for controlling and managing power of a range extended electric vehicle.

Description

Extended-range electric vehicle and energy management control method and device thereof

Technical field

The present invention relates to the field of electric vehicle technologies, and in particular, to an extended-range electric vehicle and an energy management control method and apparatus thereof.

Background technique

In the related art, the extended program electric vehicle has simple and rough control schemes when controlling the range extender, and the actual driving situation of the extended-range electric vehicle is complicated, and many factors affect the range extender. Operation, therefore, the extended-range electric vehicle in the related art needs to be improved.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, an object of the present invention is to provide an energy management control method for an extended-range electric vehicle, which considers various factors affecting the target power of the range extender and the target power of the drive motor when performing energy management control. Thereby the control of the range extender and the drive motor is more precise and efficient.

A second object of the present invention is to provide an energy management control device for an extended-range electric vehicle.

A third object of the present invention is to provide an extended-range electric vehicle.

In order to achieve the above object, an energy management control method for an extended-range electric vehicle according to a first aspect of the present invention includes the steps of: acquiring a driving demand power of a vehicle; and calculating a driving motor of the extended-range electric vehicle according to the driving demand power of the vehicle. Target power, and controlling the drive motor according to the target power of the drive motor; acquiring battery target power and system loss power of the extended-range electric vehicle, and according to the battery target power, the system loss power Calculating a target power of the vehicle with the target power of the drive motor; calculating a target power of the range extender according to the target power of the vehicle and the loss power of the range extender in the extended-range electric vehicle; according to the battery in the extended-range electric vehicle The power value of the power regulator corrects the target power of the range extender to obtain a ranger target power correction value; and controls the range extender according to the range extender target power correction value.

According to the energy management control method of the extended-range electric vehicle according to the embodiment of the present invention, various factors affecting the target power of the range extender and the target power of the drive motor are considered in the energy management control, thereby making the range extender and the drive motor The control is more precise and efficient.

In order to achieve the above object, an energy management control apparatus for an extended-range electric vehicle according to a second aspect of the present invention includes: a demand power acquisition module for acquiring a driving demand power of a vehicle; and a driving motor target power calculation module for Vehicle driving demand power calculates target power of the driving motor in the extended-range electric vehicle; vehicle target a power calculation module, configured to acquire a battery target power and a system loss power of the extended-range electric vehicle, and calculate a vehicle target power according to the battery target power, the system loss power, and a target power of the driving motor; a target power calculation module, configured to calculate a target power of the range extender according to the vehicle target power and a lost power of the range extender in the extended-range electric vehicle; a range extender power correction module, configured to The power value of the battery power conditioner in the electric vehicle is corrected for the target power of the range extender to obtain a ranger target power correction value; and a control module is configured to correct the value according to the range extender target power The range extender controls and controls the drive motor based on the target power of the drive motor.

According to the energy management control device of the extended-range electric vehicle according to the embodiment of the present invention, various factors affecting the target power of the range extender and the target power of the drive motor are considered in performing the energy management control, thereby making the range extender and the drive motor The control is more precise and efficient.

In order to achieve the above object, an extended-range electric vehicle according to an embodiment of the third aspect of the present invention includes the energy management control device of the second aspect of the present invention.

According to the extended-range electric vehicle according to the embodiment of the present invention, since the energy management control device is provided, various factors affecting the target power of the range extender and the target power of the drive motor are considered in performing the energy management control, thereby making the range extend. The control of the drive and drive motor is more precise and efficient, which improves the driving experience and safety of the extended-range electric vehicle.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic diagram of the principle of an extended-range electric vehicle according to an embodiment of the present invention;

2 is a flow chart of an energy management control method for an extended-range electric vehicle according to an embodiment of the present invention;

3 is a block diagram of an energy management control device for an extended-range electric vehicle in accordance with one embodiment of the present invention.

Reference mark:

Vehicle control unit 100, controller control unit 200, generator control unit 300, engine control unit 400, drive motor control unit 500, ISG 600, engine 700, drive motor 800; demand power acquisition module 10, drive motor target power calculation The module 20, the vehicle target power calculation module 30, the range extender target power calculation module 40, the range extender power correction module 50, and the control module 60.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

The energy management control method, apparatus and extended-range electric vehicle of the extended-range electric vehicle according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

First, the structure of an extended-range electric vehicle in the embodiment of the present invention will be described. As shown in FIG. 1 , an extended-range electric vehicle includes: a complete vehicle control unit 100, a stroker control unit 200, a generator control unit 300, an engine control unit 400, a drive motor control unit 500, an ISG 600, an engine 700, and a drive motor. 800. Among them, the generator control unit 300 is used to control the ISG 600, the engine control unit 400 is used to control the engine 700, and the drive motor control unit 500 is used to control the drive motor 800. The vehicle control unit 100, the timer control unit 200, the generator control unit 300, the engine control unit 400, and the drive motor control unit 500 communicate via a CAN network, and the ISG 600 is directly connected to the engine 700.

The vehicle control unit 100 detects all state information necessary for driving the vehicle, and outputs engine start stop command information after comprehensive judgment, including an engine emergency stop command, an engine stop command, an engine start command, and a generator limit power.

The controller control unit 200 controls the engine start according to the engine start stop command information of the vehicle control unit, and sends the generator state command, the generator target speed command, and the maximum torque absolute value that allows the generator output to the generator control unit 300, The engine stop request, the engine start request are sent to the engine control unit 400, and the engine start fault flag and the process condition are fed back to the vehicle control unit 100.

The generator control unit 300 commands the control of the ISG 600 to operate according to the controller control unit 200.

The engine control unit 400 commands the control of the operation of the engine 700 in accordance with the scheduler control unit 200, and feeds back the engine start completion flag to the timer control unit 200.

The drive motor control unit 500 commands the control of the drive motor 800 to operate according to the vehicle control unit 100, and feeds back the drive motor status information to the vehicle control unit 100.

2 is a flow chart of an energy management control method for an extended-range electric vehicle in accordance with one embodiment of the present invention. As shown in FIG. 2, an energy management control method for an extended-range electric vehicle according to an embodiment of the present invention includes the following steps:

S1, obtaining the driving demand power of the vehicle.

Specifically, the driver's driving intention (eg, acceleration intention, deceleration intention) is judged based on the driver's operation of the accelerator pedal or the brake pedal, and the vehicle driving demand power is acquired according to the driver's driving intention.

In an embodiment of the present invention, acquiring the driving demand power of the vehicle includes: when determining that the driving intention of the driver is the acceleration intention, acquiring the driving demand power of the vehicle according to the accelerator pedal depth, the current vehicle speed, and the torque limiting demand of the driving motor; Or when it is judged that the driving intention of the driver is the deceleration intention, the vehicle driving demand power is acquired according to the current vehicle speed and the torque limiting demand of the driving motor.

Specifically, when the driver steps on the accelerator pedal, it is determined that the driver has an acceleration intention. At this time, the driver torque demand is calculated according to the accelerator pedal depth and the current vehicle speed, and then the condition limit processing such as the drive motor torque limit demand is processed. After the vehicle is required to drive power, the vehicle's driving demand power is positive; when the driver steps on the brake pedal or loosens the throttle to slide, the driver is judged to have the intention of deceleration. At this time, according to the current speed, the table is checked. The braking feedback power is output, and the vehicle feedback target power is obtained after the condition limit processing of the driving motor power generation torque limit demand, and the vehicle driving demand power is a negative value at this time.

S2: Calculate the target power of the driving motor in the extended-range electric vehicle according to the driving demand power of the vehicle, and control the driving motor according to the target power of the driving motor.

In an embodiment of the present invention, calculating the target power of the driving motor according to the driving demand power of the vehicle, comprising: calculating a vehicle driving demand power correction value according to the vehicle driving demand power and the driving motor loss power; and correcting the power according to the vehicle driving demand power and The maximum power of the drive motor corresponding to the current speed of the drive motor generates the target power of the drive motor.

Specifically, the target power of the drive motor is comprehensively calculated according to conditions such as the vehicle running demand power, the current rotational speed of the drive motor, and the loss power of the drive motor.

More specifically, the maximum power of the driving motor at the current rotational speed of the driving motor is calculated according to the current rotational speed of the driving motor, and considering the working efficiency problem of the driving motor, the vehicle driving target power is superimposed with the loss power of the driving motor to calculate the corrected vehicle driving. The target power correction value is calculated by calculating the target power of the drive motor after the maximum power limit of the drive motor at the current speed.

Further, after calculating the target power of the driving motor, the method further includes: determining whether the current ambient temperature is less than the first preset temperature; determining whether the target power of the driving motor is greater than the current ambient temperature when the current ambient temperature is less than the first preset temperature The lower battery allows the discharge power; if the target power of the drive motor is greater than the allowable discharge power of the battery at the current ambient temperature, the target power of the drive motor is corrected to the allowable discharge power of the battery at the current ambient temperature; if the target power of the drive motor is less than or equal to the current The battery is allowed to discharge power at ambient temperature, keeping the target power of the drive motor constant.

Specifically, the target power of the drive motor is corrected in consideration of various limitations including battery power limitations. In a lower temperature environment (ie, when the current ambient temperature is less than the first preset temperature), the battery allows the charge and discharge power to be limited. When the battery allows the discharge power to be less than the target power of the drive motor, in order to ensure the safety and reliability of the battery, it is necessary to correct the target power of the drive motor to the allowable discharge power of the battery; if the allowable discharge power of the battery is greater than or equal to the target power of the drive motor, the drive The target power of the motor does not need to be corrected.

S3. Obtain a battery target power and a system loss power of the extended-range electric vehicle, and calculate a target power of the vehicle according to the target power of the battery, the power loss of the system, and the target power of the driving motor.

Specifically, in order to meet the vehicle driving demand power from the vehicle and the battery target power from the energy management control and the high-voltage accessory power demand of the vehicle, it is necessary to calculate the vehicle target by considering factors such as the target power of the driving motor, the target power of the battery, and the power loss of the system. power. In the extended-range electric vehicle, the user can select the pure electric mode by pressing the button. Switch to the extended mode. In the extended mode, the vehicle will use the current SoC value as the target SoC value and maintain the current SoC. The target power of the battery can be calculated based on factors such as the target SoC value. The loss power of the system is the loss power of the high-voltage system accessories of the whole vehicle, including the power loss of high-voltage components such as air conditioning systems and DC-DC. The target power of the vehicle is the sum of the target power of the drive motor, the target power of the battery, and the power loss of the system.

S4. Calculate the target power of the range extender according to the target power of the vehicle and the lost power of the range extender in the extended-range electric vehicle.

Specifically, the calculation of the target power of the router requires consideration of the efficiency of the system, and the target power of the router is obtained by superimposing the target power of the vehicle and the loss power of the range extender.

S5. Correct the target power of the range extender according to the power value of the battery power regulator in the extended-range electric vehicle to obtain the ranger target power correction value.

In an embodiment of the present invention, S5 includes: superimposing the target power of the range extender and the power value of the battery power regulator to obtain a superimposed value, and obtaining a range extender target power correction value according to the superimposed value.

Specifically, in addition to the vehicle power demand, the requirements of the vehicle high-voltage accessories, etc., it is necessary to correct according to the battery power regulator to ensure that the battery discharge capacity meets the requirements of the vehicle control strategy. Wherein, the difference between the battery target power and the current battery power is the power of the battery power regulator.

Further, obtaining the range extender target power correction value according to the superimposed value comprises: determining whether the current ambient temperature is less than the first preset temperature; if the current ambient temperature is greater than or equal to the first preset temperature, using the superimposed value as the range extender The target power correction value; if the current ambient temperature is less than the first preset temperature, further determining whether the extended-range electric vehicle is performing braking energy recovery; if the extended-range electric vehicle is performing braking energy recovery, recovering power according to the braking energy The battery allows the charging power to limit the superimposed value at the current ambient temperature to obtain the ranger target power correction value.

Specifically, the target power of the chirp is corrected in consideration of various limitations including battery power limitations. When the vehicle is not in a lower temperature environment, the target power of the power controller is calculated by superimposing the target power of the controller calculated in step S4. In the lower temperature environment (that is, when the current ambient temperature is lower than the first preset temperature), the battery allows the charging and discharging power to be limited, then there will be a brake feedback process, and the braking energy recovery and the stroke device are simultaneously When the battery is being charged, there may be cases where the charging power exceeds the allowable charging power of the battery, which may cause damage to the battery. In this case, in order to ensure the safety and reliability of the battery, it is necessary to ensure that the sum of the braking energy recovery power and the power generation power of the router is less than the allowable charging power of the battery. Both the braking energy recovery power and the power generation power of the ranger are used to preferentially ensure the braking energy recovery power, and secondly to ensure the power generation of the circuit breaker. That is to say, when the vehicle is in a lower temperature environment, if the vehicle is performing braking energy recovery, it is necessary to limit the superimposed value according to the difference between the allowable charging power of the battery and the braking energy recovery power to obtain the ranger target power correction value. .

S6, controlling the range extender according to the range extender target power correction value.

In an embodiment of the present invention, S6 includes: obtaining an optimal curve of the range extender fuel consumption rate according to the engine fuel consumption rate MAP map; according to the range extender fuel consumption rate optimal graph and the range extender target power correction value Get extended range Target speed and target torque; control the range extender according to the target speed and target torque.

Specifically, the engine and generator (ISG) are part of the range extender system, and the optimal engine operating point is not necessarily the optimum operating point of the process. In the engine fuel consumption rate MAP map, taking into account the efficiency of the program, the optimal fuel consumption rate curve is given, and the current range extender target is calculated according to the optimal fuel consumption rate curve of the process. The optimal operating point of the power tool corresponding to the power correction value is calculated, and the target speed and the target torque of the flow controller are calculated, and the engine and the ISG motor of the range extender are controlled according to the calculated target speed and the target torque.

In addition, in an embodiment of the present invention, for the environment such as low temperature and high altitude, the target speed and the target torque of the range extender need to be environmentally compensated, that is, the target speed of the stroke controller according to environmental factors such as water temperature and atmospheric pressure, respectively. Compensate control with target torque.

In the embodiment of the present invention, when the energy of the extended-range electric vehicle is managed and controlled, the calculation of the target power of the driving motor is compensated according to the driving motor and its control efficiency, and the effective power outputted by the driving motor can satisfy the vehicle. Power demand; the target power of the processor is modified according to the battery power regulator to meet the energy management target of the battery SoC; in the lower temperature environment, the target power of the processor considers the battery charge and discharge power limit, and is preferred. Guarantee the braking energy recovery power, and secondly ensure the power generation of the circuit breaker, so as to ensure the safe and reliable operation of the battery, and improve the recovery efficiency as much as possible; the target power of the router selects the optimal working point of the router according to the system efficiency. It can ensure that the stroker works at the optimal working point of the system, instead of the pure engine optimal working point, which improves the overall working efficiency of the stroker to a certain extent; the power generation target speed and target torque of the router are different. Environmental factors are compensated to make the control of the range extender more precise; drive Machine according to the target power to be limiting battery power, so as to ensure safe and reliable battery.

The energy management control method of the extended-range electric vehicle according to the embodiment of the present invention considers various factors affecting the target power of the range extender and the target power of the drive motor when performing energy management control, thereby making the range extender and the drive motor Control is more precise and efficient.

In order to achieve the above object, the present invention also provides an energy management control device for an extended-range electric vehicle. The energy management control device is applied to a vehicle control unit of an extended-range electric vehicle.

3 is a block diagram of an energy management control device for an extended-range electric vehicle in accordance with one embodiment of the present invention. As shown in FIG. 3, the energy management control device includes: a demand power acquisition module 10, a drive motor target power calculation module 20, a vehicle target power calculation module 30, a range extender target power calculation module 40, and a range extender power correction module 50. And control module 60.

The demand power acquisition module 10 is configured to acquire vehicle driving demand power.

Specifically, the required power acquisition module 10 determines the driving intention of the driver (eg, the acceleration intention, the deceleration intention) according to the operation of the accelerator pedal or the brake pedal by the driver, and further acquires the vehicle driving demand power according to the driving intention of the driver.

In an embodiment of the present invention, the required power acquisition module 10 is configured to: when determining that the driving intention of the driver is an acceleration intention, acquire the vehicle driving demand power according to the accelerator pedal depth, the current vehicle speed, and the torque limitation requirement of the driving motor; Or when it is judged that the driving intention of the driver is the deceleration intention, the vehicle driving demand power is acquired according to the current vehicle speed and the torque limiting demand of the driving motor.

Specifically, when the driver steps on the accelerator pedal, the demand power acquisition module 10 determines that the driver has an acceleration intention. At this time, the driver torque demand is calculated according to the accelerator pedal depth and the current vehicle speed, and then the drive motor torque limit demand is passed. After the conditional limit processing, the vehicle's driving demand power is obtained. At this time, the vehicle driving demand power is positive; when the driver steps on the brake pedal or loosens the throttle to slide, it is judged that the driver has the intention of deceleration, at this time, according to the current car. The quick look-up table obtains the braking feedback power, and after the condition limit processing of the driving motor power generation torque limit demand, the vehicle feedback target power is obtained, and the vehicle driving demand power is negative at this time.

The driving motor target power calculation module 20 is configured to calculate a target power of the driving motor in the extended-range electric vehicle according to the vehicle driving demand power.

In an embodiment of the present invention, the driving motor target power calculation module 20 is configured to: calculate a vehicle driving demand power correction value according to the vehicle driving demand power and the driving motor loss power; and according to the vehicle driving demand power correction value and the current driving motor The maximum power of the drive motor corresponding to the rotational speed generates the target power of the drive motor.

Specifically, the drive motor target power calculation module 20 comprehensively calculates the target power of the drive motor according to conditions such as the vehicle travel demand power, the current rotational speed of the drive motor, and the loss power of the drive motor.

More specifically, the driving motor target power calculation module 20 calculates the maximum power of the driving motor at the current rotational speed of the driving motor according to the current rotational speed of the driving motor, and calculates the superposition of the driving power of the driving motor and the loss power of the driving motor in consideration of the working efficiency of the driving motor. The corrected vehicle drive target power correction value is obtained, and the target power of the drive motor is calculated after the maximum power limit of the drive motor at the current speed.

Further, the driving motor target power calculation module 20 is further configured to: determine whether the current ambient temperature is less than the first preset temperature, and further determine whether the target power of the driving motor is greater than the current ambient temperature when the current ambient temperature is less than the first preset temperature Allowing the discharge power, and correcting the target power of the drive motor to the allowable discharge power of the battery at the current ambient temperature when determining that the target power of the drive motor is greater than the allowable discharge power of the battery at the current ambient temperature, and determining that the target power of the drive motor is less than or equal to The allowable discharge power of the battery at the current ambient temperature is to maintain the target power of the drive motor.

Specifically, the drive motor target power calculation module 20 modifies the target power of the drive motor in consideration of various limitations including battery power limitations. In a lower temperature environment (ie, when the current ambient temperature is less than the first preset temperature), the battery allows the charge and discharge power to be limited. When the battery allows the discharge power to be less than the target power of the drive motor, in order to ensure the safety and reliability of the battery, the drive motor target power calculation module 20 needs to correct the target power of the drive motor to the battery allowable discharge power; if the battery allows the discharge power to be greater than or equal to the drive The target power of the motor, the target of the drive motor Power does not need to be corrected.

The vehicle target power calculation module 30 is configured to acquire the battery target power and the system loss power of the extended-range electric vehicle, and calculate the vehicle target power according to the battery target power, the system loss power, and the target power of the drive motor.

Specifically, in order to satisfy the vehicle driving demand power from the vehicle and the battery target power from the energy management control and the vehicle high-voltage accessory power demand, the vehicle target power calculation module 30 needs to consider the target power of the driving motor, the battery target power, and the system loss power. And other factors to calculate the vehicle target power. In the extended-range electric vehicle, the user can switch from the pure electric mode to the extended mode by pressing the button. In the extended mode, the vehicle will use the current SoC value as the target SoC value and maintain the current SoC. The target power of the battery can be calculated based on factors such as the target SoC value. The loss power of the system is the loss power of the high-voltage system accessories of the whole vehicle, including the power loss of high-voltage components such as air conditioning systems and DC-DC. The target power of the vehicle is the sum of the target power of the drive motor, the target power of the battery, and the power loss of the system.

The range extender target power calculation module 40 is configured to calculate the target power of the range extender based on the target power of the vehicle and the lost power of the range extender in the extended-range electric vehicle.

Specifically, the range extender target power calculation module 40 needs to consider the efficiency of the process system when calculating the target power of the flow controller, and the target power of the flow controller is obtained by superimposing the target power of the vehicle and the lost power of the range extender.

The range extender power correction module 50 is configured to correct the target power of the range extender according to the power value of the battery power regulator in the extended-range electric vehicle to obtain the range extender target power correction value.

In one embodiment of the present invention, the range extender power correction module 50 is configured to: superimpose the target power of the range extender and the power value of the battery power regulator to obtain a superimposed value, and obtain a range extender target according to the superimposed value. Power correction value.

Specifically, in addition to the target power of the process unit to meet the driving requirements of the vehicle, the requirements of the high-voltage accessories of the vehicle, etc., the range extender power correction module 50 needs to be corrected according to the battery power regulator to ensure that the battery discharge capacity satisfies the entire The need for vehicle control strategies. Wherein, the difference between the battery target power and the current battery power is the power of the battery power regulator.

Further, the range extender power correction module 50 is specifically configured to: determine whether the current ambient temperature is less than the first preset temperature, and use the superimposed value as the ranger target power when determining that the current ambient temperature is greater than or equal to the first preset temperature. Correcting the value, and further determining whether the extended-range electric vehicle is performing braking energy recovery when determining that the current ambient temperature is less than the first preset temperature, and recovering power according to the braking energy when determining that the extended-range electric vehicle is performing braking energy recovery The battery allows the charging power to limit the superimposed value at the current ambient temperature to obtain the ranger target power correction value.

Specifically, the target power of the chirp is corrected in consideration of various limitations including battery power limitations. When the vehicle is not in a lower temperature environment, the calculated target power of the turbometer is superimposed on the battery power regulator power value to obtain the turbo target power correction value. In the lower temperature environment (that is, when the current ambient temperature is lower than the first preset temperature), the battery allows the charging and discharging power to be limited, then there will be a brake feedback process, and the braking energy recovery and the stroke device are simultaneously When the battery is being charged, there may be cases where the charging power exceeds the allowable charging power of the battery, which may cause damage to the battery. In this case, in order to ensure the safety and reliability of the battery, it is necessary to ensure the recovery of braking energy. The sum of the power and the power generated by the stroker is less than the allowable charging power of the battery. Both the braking energy recovery power and the power generation power of the ranger are used to preferentially ensure the braking energy recovery power, and secondly to ensure the power generation of the circuit breaker. That is to say, when the vehicle is in a lower temperature environment, if the vehicle is performing braking energy recovery, it is necessary to limit the superimposed value according to the difference between the allowable charging power of the battery and the braking energy recovery power to obtain the ranger target power correction value. .

The control module 60 is configured to control the range extender according to the range extender target power correction value, and control the drive motor according to the target power of the drive motor.

In an embodiment of the present invention, the control module 60 is configured to: obtain an optimal curve of the range extender fuel consumption rate according to the engine fuel consumption rate MAP map, and according to the range extender fuel consumption rate optimal graph and range extender The target power correction value acquires the target speed and the target torque of the range extender, and controls the range extender according to the target speed and the target torque.

Specifically, the engine and generator (ISG) are part of the range extender system, and the optimal engine operating point is not necessarily the optimum operating point of the process. In the engine fuel consumption rate MAP map, the control module 60 comprehensively considers the efficiency of the stroke system, gives an optimal curve of the fuel consumption rate of the flow controller, and calculates the current increase according to the optimal fuel consumption rate graph of the flow controller. The optimal operating point of the turret corresponding to the target target power correction value is calculated, and the target rpm and target torque are calculated, and then the engine and ISG motor of the range extender are calculated according to the calculated target speed and target torque. Take control.

The energy management control device of the extended-range electric vehicle according to the embodiment of the present invention considers various factors affecting the target power of the range extender and the target power of the drive motor when performing energy management control, thereby making the range extender and the drive motor Control is more precise and efficient.

In order to achieve the above embodiments, the present invention also provides an extended-range electric vehicle including the energy management control device of the embodiment of the present invention.

The extended-range electric vehicle according to the embodiment of the present invention has the energy management control device, and considers various factors affecting the target power of the range extender and the target power of the drive motor when performing energy management control, thereby making the range extender The control of the drive motor is more precise and efficient, which improves the driving experience and safety of the extended-range electric vehicle.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. , or integrated; can be mechanical or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction of two elements, unless otherwise specified Limited. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

An energy management control method for an extended-range electric vehicle, comprising the steps of:

Obtaining the driving demand power of the vehicle;

Calculating a target power of the driving motor in the extended-range electric vehicle according to the driving demand power of the vehicle, and controlling the driving motor according to a target power of the driving motor;

Obtaining a battery target power and a system loss power of the extended-range electric vehicle, and calculating a vehicle target power according to the battery target power, the system loss power, and a target power of the driving motor;

Calculating a target power of the range extender according to the vehicle target power and the lost power of the range extender in the extended-range electric vehicle;

Correcting a target power of the range extender according to a power value of a battery power regulator in the extended-range electric vehicle to obtain a ranger target power correction value;

The range extender is controlled based on the range extender target power correction value.
The energy management control method for an extended-range electric vehicle according to claim 1, wherein the obtaining the driving demand power of the vehicle comprises:

When determining that the driving intention of the driver is the acceleration intention, acquiring the driving demand power of the vehicle according to the accelerator pedal depth, the current vehicle speed, and the torque limiting demand of the driving motor; or

When it is determined that the driving intention of the driver is the deceleration intention, the vehicle running demand power is acquired according to the current vehicle speed and the torque limiting demand of the driving motor.
The energy management control method for an extended-range electric vehicle according to claim 1, wherein the calculating the target power of the driving motor according to the driving demand power of the vehicle comprises:

Calculating a vehicle driving demand power correction value according to the vehicle driving demand power and the loss power of the driving motor;

And generating a target power of the driving motor according to the vehicle driving demand power correction value and the driving motor maximum power corresponding to the current driving speed of the driving motor.
The method of claim 3, further comprising:

Determining whether the current ambient temperature is less than the first preset temperature;

When the current ambient temperature is less than the first preset temperature, determining whether the target power of the driving motor is greater than a battery allowable discharging power at the current ambient temperature;

If the target power of the driving motor is greater than the battery allowable discharging power at the current ambient temperature, correcting the target power of the driving motor to the battery allowable discharging power at the current ambient temperature;

If the target power of the drive motor is less than or equal to the allowable discharge power of the battery at the current ambient temperature, then The target power of the drive motor is kept constant.
The energy management control method for an extended-range electric vehicle according to claim 1, wherein said target power of said range extender is corrected according to a power value of a battery power conditioner in said extended-range electric vehicle Obtain the ranger target power correction value, including:

The target power of the range extender and the power value of the battery power conditioner are superimposed to obtain a superimposed value, and the range extender target power correction value is obtained according to the superimposed value.
The energy management control method for an extended-range electric vehicle according to claim 5, wherein the obtaining the range extender target power correction value according to the superimposed value comprises:

Determining whether the current ambient temperature is less than the first preset temperature;

If the current ambient temperature is greater than or equal to the first preset temperature, the superimposed value is used as the range extender target power correction value;

If the current ambient temperature is less than the first preset temperature, further determining whether the extended-range electric vehicle is performing braking energy recovery;

If the extended-range electric vehicle is performing braking energy recovery, limiting the superimposed value according to the braking energy recovery power and the battery allowable charging power at the current ambient temperature to obtain the range extender target power correction value. .
The energy management control method for an extended-range electric vehicle according to any one of claims 1 to 6, wherein the controlling the range extender according to the range extender target power correction value comprises:

Obtain an optimal curve of the fuel consumption rate of the range extender according to the engine fuel consumption rate MAP map;

Obtaining a target speed and a target torque of the range extender according to the range extender fuel consumption rate optimal graph and the range extender target power correction value;

The range extender is controlled based on the target rotational speed and the target torque.
An energy management control device for an extended-range electric vehicle, comprising:

a demand power acquisition module, configured to acquire a driving demand power of the vehicle;

a driving motor target power calculation module, configured to calculate a target power of the driving motor in the extended-range electric vehicle according to the vehicle driving demand power;

a vehicle target power calculation module, configured to acquire a battery target power and a system loss power of the extended-range electric vehicle, and calculate a vehicle target power according to the battery target power, the system loss power, and a target power of the driving motor;

a range extender target power calculation module, configured to calculate a target power of the range extender according to the vehicle target power and a lost power of the range extender in the extended-range electric vehicle;

a range extender power correction module, configured to correct a target power of the range extender according to a power value of a battery power regulator in the extended-range electric vehicle to obtain a range extender target power correction value;

And a control module, configured to control the range extender according to the range extender target power correction value, and control the drive motor according to a target power of the drive motor.
The energy management control device for an extended-range electric vehicle according to claim 8, wherein the demand power acquisition module is configured to:

When determining that the driving intention of the driver is the acceleration intention, acquiring the driving demand power of the vehicle according to the accelerator pedal depth, the current vehicle speed, and the torque limiting demand of the driving motor; or

When it is determined that the driving intention of the driver is the deceleration intention, the vehicle running demand power is acquired according to the current vehicle speed and the torque limiting demand of the driving motor.
The energy management control device for an extended-range electric vehicle according to claim 8, wherein the drive motor target power calculation module is configured to:

Calculating a vehicle driving demand power correction value according to the vehicle driving demand power and the loss power of the driving motor;

And generating a target power of the driving motor according to the vehicle driving demand power correction value and the driving motor maximum power corresponding to the current driving speed of the driving motor.
The energy management control device for an extended-range electric vehicle according to claim 10, wherein the drive motor target power calculation module is further configured to:

Determining whether the current ambient temperature is less than the first preset temperature, and further determining whether the target power of the driving motor is greater than the allowable discharging power of the battery at the current ambient temperature when the current ambient temperature is less than the first preset temperature, and Correcting the target power of the driving motor to the battery allowable discharging power at the current ambient temperature when determining that the target power of the driving motor is greater than the battery allowable discharging power at the current ambient temperature, and determining the driving motor The target power is less than or equal to the battery allowable discharge power at the current ambient temperature to keep the target power of the drive motor constant.
The energy management control device for an extended-range electric vehicle according to claim 8, wherein the range extender power correction module is configured to:

The target power of the range extender and the power value of the battery power conditioner are superimposed to obtain a superimposed value, and the range extender target power correction value is obtained according to the superimposed value.
The energy management control device for an extended-range electric vehicle according to claim 12, wherein the range extender power correction module is specifically configured to:

Determining whether the current ambient temperature is less than the first preset temperature, and determining the superimposed value as the ranger target power correction value when determining that the current ambient temperature is greater than or equal to the first preset temperature, and determining When the current ambient temperature is less than the first preset temperature, further determining whether the extended-range electric vehicle is performing braking energy recovery, and determining that the extended-range electric vehicle is based on braking energy when performing braking energy recovery Recovering power and deserving The battery allows the charging power to limit the superimposed value at the pre-ambient temperature to obtain the ranger target power correction value.
The energy management control device for an extended-range electric vehicle according to any one of claims 8 to 13, wherein the control module is configured to:

Obtaining a maximum map of the ranger fuel consumption rate according to the engine fuel consumption rate MAP map, and acquiring the range extender according to the range extender fuel consumption rate optimal graph and the range extender target power correction value a target speed and a target torque, and controlling the range extender based on the target speed and the target torque.
An extended-range electric vehicle, comprising: the energy management control device according to any one of claims 8-14.