Range extender operating point dynamic transfer method, device, vehicle and readable storage medium

Abstract

The present application relates to the field of new energy vehicles, and provides a method, device, vehicle and readable storage medium for dynamically transferring the working point of a range extender. The method includes: determining the current expected power generation speed and the current expected power generation torque; determining the current controlled power generation speed based on the current actual power generation speed, the current expected power generation speed and the current expected power generation speed; determining the target adjustment coefficient; determining the adjusted power generation torque based on the current controlled power generation speed, the current expected power generation torque and the target adjustment coefficient; determining the first filter coefficient; obtaining the current controlled power generation torque based on the first filter coefficient and the adjusted power generation torque; controlling the range extender to dynamically transfer from the current actual power generation speed to the current controlled power generation speed, and from the current actual power generation torque to the current controlled power generation torque. The present application can achieve the optimization of comprehensive performance by taking into account the power generation efficiency, power generation power stability and power output response rate of the range extender in complex scenarios.

Description

Technical Field

[0001] The present application relates to the field of new energy vehicles, and in particular to a method, device, vehicle and readable storage medium for dynamically transferring the operating point of a range extender. Background Art

[0002] The energy sources of extended-range electric vehicles include power batteries, range extenders and drive motors; among them, the range extender is the backup energy source of the extended-range electric vehicle, responsible for energy replenishment of the power batteries and drive motors.

[0003] The range extender's operating point shift (the process by which its speed and torque change at various moments) not only affects the vehicle's economy and power, but also its power stability. For example, in low-temperature environments, if the range extender's power generation speed and torque change too quickly, it can easily become unstable and unable to output stable power. This can also easily cause the range extender's speed to become unstable, potentially damaging the range extender. If the power battery is underpowered, the rate of change of the range extender's power generation speed and torque will directly affect the vehicle's power.

[0004] Traditional range extender control solutions mainly regulate the speed and torque of the range extender for a single scenario or a single optimization goal. However, there is no solution to the problem of how to simultaneously take into account the range extender's power generation efficiency, power generation stability and power output response rate in complex scenarios to achieve the optimization of comprehensive performance. Summary of the Invention

[0005] In view of this, the embodiments of the present application provide a method, device, vehicle and readable storage medium for dynamically transferring the operating point of a range extender to solve the problem of how to simultaneously take into account the power generation efficiency, power generation stability and power output response rate of the range extender in complex scenarios, thereby achieving the optimization of comprehensive performance.

[0006] A first aspect of an embodiment of the present application provides a method for dynamically transferring an operating point of a range extender, comprising:

[0007] Obtaining the current required power generation power and the current actual power generation speed of the range extender at the current moment, and determining the current expected power generation speed and the current expected power generation torque of the range extender based on the required power generation power;

[0008] Determine the current controlled power generation speed of the range extender at the current moment based on the current actual power generation speed and the current expected power generation speed;

[0009] Obtain and determine the target adjustment coefficient based on the accelerator pedal opening signal and the power battery SOC signal. The target adjustment coefficient is related to the vehicle's power requirements.

[0010] Determine the adjusted generating torque according to the current controlled generating speed, the current expected generating torque and the target adjustment coefficient;

[0011] Obtaining a current engine coolant temperature of the range extender at a current moment, and determining a first filter coefficient based on the current engine coolant temperature;

[0012] Based on the first filter coefficient, a first-order filter process is performed on the adjusted power generation torque to obtain the current control power generation torque of the range extender at the current moment;

[0013] The range extender is controlled to dynamically transfer from the current actual power generation speed to the current controlled power generation speed, and from the current actual power generation torque to the current controlled power generation torque, thereby completing the dynamic transfer of the operating point of the range extender.

[0014] A second aspect of an embodiment of the present application provides a range extender operating point dynamic transfer device, comprising:

[0015] a first acquisition module configured to acquire a current required power generation power and a current actual power generation speed of the range extender at a current moment, and determine a current expected power generation speed and a current expected power generation torque of the range extender based on the required power generation power;

[0016] A first determining module is configured to determine a current controlled power generation speed of the range extender at a current moment based on a current actual power generation speed and a current expected power generation speed;

[0017] The second acquisition module is configured to acquire and determine a target adjustment coefficient based on the accelerator pedal opening signal and the power battery SOC signal, where the target adjustment coefficient is related to the vehicle power demand;

[0018] a second determining module configured to determine the adjusted generating torque according to the current controlled generating speed, the current expected generating torque and the target adjustment coefficient;

[0019] a third acquisition module configured to acquire a current engine coolant temperature of the range extender at a current moment and determine a first filter coefficient according to the current engine coolant temperature;

[0020] a filtering module configured to perform a first-order filtering process on the adjusted power generation torque based on a first filtering coefficient to obtain a current controlled power generation torque of the range extender at a current moment;

[0021] The transfer module is configured to control the range extender to dynamically transfer from the current actual power generation speed to the current controlled power generation speed, and from the current actual power generation torque to the current controlled power generation torque, thereby completing the dynamic transfer of the range extender's operating point.

[0022] According to a third aspect of an embodiment of the present application, a vehicle is provided, comprising: the range extender operating point dynamic transfer device according to the second aspect, and a range extender controlled by the range extender operating point dynamic transfer device.

[0023] According to a fourth aspect of an embodiment of the present application, an electronic device is provided, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0024] According to a fifth aspect of an embodiment of the present application, a readable storage medium is provided, which stores a computer program. When the computer program is executed by a processor, the steps of the above method are implemented.

[0025] Compared with the prior art, the embodiments of the present application have at least the following beneficial effects: obtaining the current required power generation power and the current actual power generation speed of the range extender at the current moment, and determining the current expected power generation speed and the current expected power generation torque of the range extender based on the required power generation power; determining the current controlled power generation speed of the range extender at the current moment based on the current actual power generation speed and the current expected power generation speed; obtaining and determining the target adjustment coefficient based on the accelerator pedal opening signal and the power battery SOC signal, the target adjustment coefficient being related to the power demand of the whole vehicle; determining the power generation speed adjustment coefficient based on the current controlled power generation speed, the current expected power generation torque and the target adjustment coefficient. torque; obtaining the current engine coolant temperature of the range extender at the current moment, and determining a first filter coefficient according to the current engine coolant temperature; performing first-order filtering on the adjusted power generation torque based on the first filter coefficient to obtain the current controlled power generation torque of the range extender at the current moment; controlling the range extender to dynamically transfer from the current actual power generation speed to the current controlled power generation speed, and from the current actual power generation torque to the current controlled power generation torque, thereby completing the dynamic transfer of the working point of the range extender, which can achieve the simultaneous consideration of the power generation efficiency, power generation power stability and power output response rate of the range extender in complex scenarios, thereby achieving the optimization of the comprehensive performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] Figure 1 This is a flow chart of a method for dynamically transferring the operating point of a range extender provided in an embodiment of the present application;

[0028] Figure 2This is a schematic structural diagram of a range extender operating point dynamic transfer device provided in an embodiment of the present application;

[0029] Figure 3 This is a structural diagram of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0031] A method and device for dynamically transferring the operating point of a range extender according to an embodiment of the present application will be described in detail below with reference to the accompanying drawings.

[0032] Figure 1 It is a flow chart of a method for dynamically transferring the operating point of a range extender provided in an embodiment of the present application. Figure 1 The range extender operating point dynamic transfer method can be executed by the vehicle control unit (VCU) of the new energy vehicle. Figure 1 As shown, the range extender operating point dynamic transfer method may specifically include:

[0033] Step S101, obtaining the current required power generation power and the current actual power generation speed of the range extender at the current moment, and determining the current expected power generation speed and the current expected power generation torque of the range extender based on the required power generation power;

[0034] Step S102, determining the current controlled power generation speed of the range extender at the current moment based on the current actual power generation speed and the current expected power generation speed;

[0035] Step S103, obtaining and determining a target adjustment coefficient based on the accelerator pedal opening signal and the power battery SOC signal, where the target adjustment coefficient is related to the vehicle power demand;

[0036] Step S104, determining the adjusted generating torque according to the current controlled generating speed, the current expected generating torque and the target adjustment coefficient;

[0037] Step S105, obtaining the current engine coolant temperature of the range extender at the current moment, and determining a first filter coefficient according to the current engine coolant temperature;

[0038] Step S106, performing first-order filtering on the adjusted power generation torque based on the first filter coefficient to obtain the current controlled power generation torque of the range extender at the current moment;

[0039] Step S107 , controlling the range extender to dynamically transfer from the current actual power generation speed to the current controlled power generation speed, and dynamically transfer from the current actual power generation torque to the current controlled power generation torque, thereby completing the dynamic transfer of the operating point of the range extender.

[0040] In one example, a new energy vehicle's vehicle controller can use various sensors installed on the vehicle to collect the vehicle's current speed signal, power battery SOC signal, and accelerator pedal position signal. The collected speed signal, power battery SOC signal, and accelerator pedal position signal are then input into a pre-trained power generation calculation model for processing to obtain the current power generation required by the range extender at the current moment. The power generation calculation model can be a pre-trained deep learning network model, for example.

[0041] Furthermore, the vehicle controller can use the above-mentioned current required power generation power to query the current expected power generation speed and current expected power generation torque corresponding to the current required power generation power from the pre-designed "required power generation power-expected power generation speed-expected power generation torque" correspondence table.

[0042] In one example, a correspondence table of "required power generation power - expected power generation speed - expected power generation torque" is shown in Table 1. Table 1 is a correspondence table of "required power generation power - expected power generation speed - expected power generation torque" calibrated according to the range extender efficiency in this embodiment.

[0043] Table 1. Correspondence between “required power generation-expected power generation speed-expected power generation torque”

[0044]

[0045] If the current required power generation power of the range extender at the current moment is known, the current expected power generation speed and current expected power generation torque of the range extender at the current moment can be determined by querying Table 1. For example, if the current required power generation power of the range extender at the current moment is known to be P1, then by querying Table 1, the current expected power generation speed of the range extender at the current moment can be determined to be S1 and the current expected power generation torque of the range extender at the current moment can be determined to be T1.

[0046] The technical solution provided by the embodiments of the present application determines the corresponding current desired generating speed and current desired generating torque using the current required generating power of the range extender at the current moment, selects the corresponding target adjustment coefficient using the accelerator pedal opening signal and the power battery SOC signal, adjusts the current desired generating torque according to the target adjustment coefficient to determine the adjusted generating torque, then determines the corresponding first filter coefficient according to the current engine coolant temperature of the range extender at the current moment, and performs a first-order filter processing on the adjusted generating torque based on the first filter coefficient to obtain the current controlled generating torque of the range extender at the current moment. Finally, the range extender is controlled to dynamically shift from the current actual generating speed to the current controlled generating speed, and the current actual generating torque is dynamically shifted to the current controlled generating torque, thereby completing the dynamic shift of the range extender's operating point at the current moment. The above technical solution simultaneously takes into account the range extender's power generation efficiency, the stability of the generated power under different temperature conditions, and how to improve the power output response rate in the case of power shortage, thereby maximizing the optimization of the range extender's overall performance.

[0047] In some embodiments, determining the current controlled power generation speed of the range extender at the current moment based on the current actual power generation speed and the current expected power generation speed includes:

[0048] determining a second filter coefficient based on the current actual power generation speed and the current expected power generation speed;

[0049] Based on the second filter coefficient, a first-order filter process is performed on the current desired power generation speed to obtain the current controlled power generation speed of the range extender at the current moment.

[0050] Furthermore, determining a second filter coefficient based on the current actual power generation speed and the current expected power generation speed includes:

[0051] Calculate the speed difference between the current actual power generation speed and the current expected power generation speed;

[0052] If the speed difference is greater than or equal to zero, determining a second filter coefficient corresponding to the current actual power generation speed based on a preset first correlation between the range extender power generation speed and the filter coefficient;

[0053] If the speed difference is less than zero, a second filter coefficient corresponding to the current actual power generation speed is determined based on a preset second correlation between the range extender power generation speed and the filter coefficient.

[0054] In one example, the first correlation between the range extender generator speed and the filter coefficient may be determined by the following steps:

[0055] Get the maximum design power generation speed and the minimum design power generation speed of the range extender;

[0056] Based on the preset first optimization objective, calibrate a series of second filter coefficients of the range extender at different actual power generation speeds, wherein the actual power generation speed is within the power generation speed range from the lowest design power generation speed to the highest design power generation speed;

[0057] A correspondence between the actual power generation speed and the second filter coefficient is established to determine a first correlation between the power generation speed of the range extender and the filter coefficient, wherein the second filter coefficient corresponding to the actual power generation speed shows a downward trend in an area close to the maximum design power generation speed and in an area close to the minimum design power generation speed.

[0058] Among them, the maximum design power generation speed and the minimum design power generation speed usually refer to the maximum power generation speed and the minimum power generation speed that can ensure the reliable operation of the range extender, which is related to the model of the range extender and its own characteristics.

[0059] When the speed difference between the current actual generating speed and the current desired generating speed is greater than or equal to zero, a series of second filter coefficients can be calibrated for different actual generating speeds of the range extender as follows. Specifically, the actual generating speed of the range extender is fixed, and based on the first optimization objective of imperceptible range extender vibration, the second filter coefficients corresponding to each actual generating speed are calibrated. For example, the actual generating speed of the range extender is fixed at n1, and the desired generating speed n1' is set higher than n1. With imperceptible range extender vibration as the first optimization objective, the second filter coefficient a1 is calibrated when the range extender dynamically shifts from the actual generating speed n1 to the desired generating speed n1'. Similarly, the second filter coefficient a2 corresponding to the actual generating speed n2, and finally the second filter coefficient an corresponding to the actual generating speed nn can be calibrated. When the range extender is close to the maximum designed generating speed nn, the second filter coefficient corresponding to the actual generating speed within this range is gradually adjusted downwards, with the second optimization objective of stable generating operation and the range extender speed not exceeding the adjustment target. A correspondence between the actual generating speed of the range extender and the second filter coefficient is established to determine a first correlation between the generating speed of the range extender and the filter coefficient, as shown in Table 2. Table 2 is a correspondence table of the first correlation between the generating speed of the range extender and the filter coefficient obtained according to the above calibration method in the implementation of this application.

[0060] Table 2 Correspondence table of the first correlation relationship between generator speed and filter coefficient

[0061]

[0062] Calibration revealed that between the minimum design speed n1 and the maximum design speed nn, the range extender's actual speed and the second filter coefficient exhibited an overall trend of first gradually increasing and then gradually decreasing. Using the actual speed as the horizontal axis and the second filter coefficient as the vertical axis, data fitting using computer software revealed that the functional relationship between the range extender's actual speed and the second filter coefficient approximates a parabola. Near both the maximum design speed nn and the minimum design speed n1, the second filter coefficient corresponding to the actual speed exhibited a decreasing trend.

[0063] When the speed difference between the current actual power generation speed and the current expected power generation speed is less than zero, a series of second filter coefficients of the range extender at different actual power generation speeds can be calibrated in the following way. Specifically, the actual power generation speed of the range extender is fixed, and the second filter coefficients corresponding to each actual power generation speed are calibrated based on the first optimization goal of not being able to perceive the vibration of the range extender. For example, the actual power generation speed of the range extender is fixed to nn, and the expected power generation speed nn' is set to be lower than nn. With the first optimization goal of not being able to perceive the vibration of the range extender, the second filter coefficient bn of the range extender when it dynamically transfers from the actual power generation speed nn to the expected power generation speed nn' is calibrated; similarly, the second filter coefficient bn corresponding to the actual power generation speed can be calibrated. The corresponding second filter coefficient ...a second filter coefficient b1 corresponding to the actual power generation speed n1. When approaching the range extender's minimum design power generation speed n1, the second optimization goal is to ensure stable power generation and that the range extender speed does not exceed the adjustment target. The second filter coefficient corresponding to the actual power generation speed within this range is gradually adjusted downward. A correspondence between the range extender's actual power generation speed and the second filter coefficient is established to determine a second correlation between the range extender's power generation speed and the filter coefficient, as shown in Table 3. Table 3 is a table of the second correlation between the range extender's power generation speed and the filter coefficient obtained according to the calibration method described above, as implemented in this application.

[0064] Table 3 Correspondence table of the first correlation relationship between generator speed and filter coefficient

[0065]

[0066] In one example, the current controlled power generation speed of the range extender at the current moment is calculated using formula (1):

[0067] (1)

[0068] In formula (1), Indicates the current controlled power generation speed of the range extender at the current moment, Indicates the current expected power generation speed of the range extender at the current moment, It represents the last controlled power generation speed of the range extender at the last moment, k represents the second filter coefficient, and the value range of the second filter coefficient is (0,1).

[0069] In an application example, the vehicle controller can first obtain the current expected power generation speed corresponding to the current required power generation power by querying the above Table 1 according to the current required power generation power of the range extender; then, based on the current actual power generation speed of the range extender collected at the current moment, calculate the speed difference between the current expected power generation speed and the current actual power generation speed, and then query Table 2 or Table 3 according to the speed difference to obtain the second filter coefficient corresponding to the current actual power generation speed; then, the previous control power generation speed of the range extender collected at the previous moment, the current expected power generation speed obtained by querying the table, and the second filter coefficient can be substituted into the above formula (1) to calculate the current control power generation speed of the range extender at the current moment.

[0070] In some embodiments, determining the adjusted generating torque according to the current controlled generating speed, the current desired generating torque, and the target adjustment coefficient includes:

[0071] Query and obtain the torque at the highest efficiency point corresponding to the current controlled generator speed;

[0072] Based on the target adjustment coefficient, the maximum efficiency point torque and the current expected power generation torque are weighted to obtain the adjusted power generation torque.

[0073] In one example, after calculating the current controlled power generation speed of the range extender through the above steps, the highest efficiency point torque corresponding to the current controlled power generation speed can be determined by querying the corresponding relationship table of "controlled power generation speed-highest efficiency point torque" pre-calibrated according to the efficiency of the range extender, as shown in Table 4.

[0074] Table 4. Correspondence between Controlled Generator Speed ​​and Maximum Efficiency Point Torque

[0075]

[0076] For example, when the current control power generation speed of the range extender is known to be In the case of The corresponding maximum efficiency point torque is .

[0077] In one example, a "accelerator pedal opening - power battery SOC - adjustment coefficient" correspondence table can be constructed through the following calibration method, as shown in Table 5. Table 5 shows the adjustment coefficients at different accelerator pedal openings and different power battery SOCs calibrated according to the vehicle power requirements in the embodiment of the present application.

[0078] Table 5. Correspondence between “Accelerator pedal opening-Power battery SOC-Adjustment coefficient”

[0079]

[0080] For example, with the power battery SOC fixed at approximately SOC1, the adjustment coefficient Fac at different accelerator pedal openings is calibrated based on the vehicle's power requirements to obtain the first column of data in Table 5. With the power battery SOC fixed at approximately SOC2, the same calibration method is used to obtain the second column of data in Table 5. Similarly, the same calibration method is used to obtain the nth column of data in Table 5. Similarly, with the accelerator pedal opening fixed at Pedl1, the adjustment coefficient Fac at different SOCs is calibrated based on the vehicle's power requirements to obtain the first row of data in Table 5. The same calibration method is used to obtain the nth row of data in Table 5.

[0081] In some embodiments, determining a target adjustment coefficient based on an accelerator pedal opening signal and a power battery SOC signal includes:

[0082] Finding a series of first adjustment coefficients according to the accelerator pedal opening signal;

[0083] Find out a series of second adjustment coefficients according to the power battery SOC signal;

[0084] An intersection coefficient between the first adjustment coefficient and the second adjustment coefficient is found, and the intersection coefficient is determined as a target adjustment coefficient.

[0085] In one example, given an accelerator pedal position signal of Pedl1 and a power battery SOC signal of SOC1, Table 5 can be consulted to obtain a series of first adjustment coefficients corresponding to Pedl1, Fac11...Fac1n (i.e., the first row of Table 5), and a series of second adjustment coefficients corresponding to SOC1, Fac11...Facn1 (i.e., the first column of Table 5). The intersection coefficient between the first and second adjustment coefficients is determined to be Fac11, and Fac11 is then determined as the target adjustment coefficient.

[0086] In one example, the following formula (1) is used to calculate the adjusted generating torque:

[0087] (2)

[0088] In formula (2), Indicates the adjustment of the generating torque. represents the target adjustment coefficient, Indicates the current expected power generation torque, Indicates the torque at the highest efficiency point corresponding to the current controlled generating speed.

[0089] In some embodiments, based on the first filter coefficient, a first-order filter process is performed on the adjusted power generation torque to obtain the current controlled power generation torque of the range extender at the current moment, including:

[0090] Obtain the previous controlled power generation torque of the range extender at the previous moment and the current actual power generation torque at the current moment;

[0091] According to the first filter coefficient, a weighted operation is performed on the current desired power generation torque and the previous controlled power generation torque to obtain the current controlled power generation torque of the range extender at the current moment.

[0092] In one example, first, the vehicle controller can collect the current engine coolant temperature of the range extender at the current moment, and then obtain the first filter coefficient corresponding to the current engine coolant temperature by querying a pre-designed "engine cooling temperature-first filter coefficient" correspondence table.

[0093] Among them, the "engine cooling temperature-first filter coefficient" correspondence table is shown in Table 6. The embodiment of the present application calibrates and establishes the "engine cooling temperature-first filter coefficient" correspondence table through the following method. Specifically, in a relatively low temperature range, generally refers to a temperature range below 20°C, let the vehicle stand in this temperature range, so that the engine coolant temperature of the range extender stabilizes in this temperature range, and the range extender generates electricity stably and the torque does not fluctuate greatly. The first filter coefficient is calibrated by adjusting different engine torques. In one example, taking the calibration of the first filter coefficient d1 as an example, first let the vehicle stand in an ambient temperature C1, so that the engine coolant temperature is after C1, and then the range extender generates electricity stably and the torque does not fluctuate greatly. The first filter coefficient d1 is calibrated by adjusting different engine torques.

[0094] Similarly, in a higher temperature range (generally ≥40°C), the range extender generator engine coolant temperature is first controlled to within this temperature range. Then, with the goal of ensuring stable power generation and minimal torque fluctuations, the engine torque is adjusted to calibrate the first filter coefficient. In one example, calibrating the first filter coefficient dn is performed by first controlling the range extender generator engine coolant temperature to within Cn. Then, with the goal of ensuring stable power generation and minimal torque fluctuations, the engine torque is adjusted to calibrate the first filter coefficient dn.

[0095] Table 6 “Engine cooling temperature-first filter coefficient” correspondence table

[0096]

[0097] When the engine cooling temperature of the range extender is known, the corresponding first filter coefficient can be determined by querying Table 6. For example, when the engine cooling temperature of the range extender is known to be C1, the corresponding first filter coefficient can be determined to be d1 by querying Table 6.

[0098] In one embodiment, the following formula (3) is used to perform a weighted operation (i.e., a first-order filtering process) on the adjusted power generation torque and the previous control power generation torque to obtain the current control power generation torque of the range extender at the current moment.

[0099] (3)

[0100] In formula (3), Indicates the current control power generation torque of the range extender at the current moment, Indicates the adjustment of the generating torque. It represents the last controlled power generation torque of the range extender at the last moment, d represents the first filter coefficient, and the value range of the first filter coefficient is (0,1).

[0101] In an application example, the vehicle controller can first obtain the current expected power generation torque corresponding to the current required power generation power by querying the above Table 1 based on the current required power generation power of the range extender, and obtain the current controlled power generation speed by querying the above Table 4 using the current controlled power generation speed calculated by the above formula (1); then, according to the collected accelerator pedal opening signal and the power battery SOC signal, the corresponding target adjustment coefficient is obtained by querying the above Table 5, and the obtained highest efficiency point torque, target adjustment coefficient and current expected power generation torque are substituted into the above formula (2) to calculate the adjusted power generation torque; then, according to the collected current engine cooling temperature of the range extender, the first filter coefficient corresponding to the current engine cooling temperature is obtained by querying the above Table 6, and the expected power generation torque of the range extender at the current moment, the previous controlled power generation torque at the previous moment and the first filter coefficient are substituted into the above formula (3) to calculate the current controlled power generation torque of the range extender at the current moment.

[0102] Through the technical solutions of the above embodiments, the present application first takes into account the current required power generation power of the range extender, and determines the current expected power generation speed and the current expected power generation torque of the range extender at the current moment according to the current required power generation power. The current expected power generation speed and the current expected power generation torque obtained here are not the operating points actually used by the present application to control the speed and torque of the range extender. In order to further optimize the demand for fast power output of the range extender in the scenario of insufficient power, the present application determines the highest efficiency electric torque based on the current controlled power generation speed of the range extender under the premise of taking into account the power generation power of the range extender, and combines the target adjustment coefficient, the current expected power generation speed and the current expected power generation torque that are closely related to the power requirements of the whole vehicle to adjust the current expected power generation speed. The speed and the torque at the highest efficiency point are more reasonably distributed to obtain the adjusted power generation torque; at the same time, in order to further optimize the power generation power stability of the range extender at different temperatures, the first filter coefficient is determined in combination with the current engine coolant of the range extender, and the first filter coefficient is used to perform first-order filtering on the above-mentioned adjusted power generation torque to obtain the current controlled power generation torque; finally, the operating point of the range extender at the current moment is dynamically transferred from the current actual power generation speed and the current actual power generation torque to the above-mentioned current controlled power generation speed and the current controlled power generation torque, thereby achieving the simultaneous consideration of the power generation efficiency of the range extender, the power generation power stability under different temperature conditions, and how to improve the power output response rate when the power is insufficient, so as to achieve the optimization of the comprehensive performance of the range extender.

[0103] All of the above optional technical solutions can be combined in any way to form optional embodiments of the present application, and will not be described in detail here.

[0104] The following are device embodiments of the present application, which can be used to implement the method embodiments of the present application. For details not disclosed in the device embodiments of the present application, please refer to the method embodiments of the present application.

[0105] Figure 2 This is a schematic diagram of a range extender operating point dynamic transfer device provided in an embodiment of the present application. Figure 2 As shown, the range extender operating point dynamic transfer device includes:

[0106] The first acquisition module 201 is configured to obtain the current required power generation power and the current actual power generation speed of the range extender at the current moment, and determine the current expected power generation speed and the current expected power generation torque of the range extender based on the required power generation power;

[0107] The first determination module 202 is configured to determine the current controlled power generation speed of the range extender at the current moment based on the current actual power generation speed and the current expected power generation speed;

[0108] The second acquisition module 203 is configured to acquire and determine a target adjustment coefficient based on the accelerator pedal opening signal and the power battery SOC signal, where the target adjustment coefficient is related to the vehicle power demand;

[0109] The second determining module 204 is configured to determine the adjusted generating torque according to the current controlled generating speed, the current expected generating torque and the target adjustment coefficient;

[0110] a third acquisition module 205 configured to acquire a current engine coolant temperature of the range extender at a current moment, and determine a first filter coefficient according to the current engine coolant temperature;

[0111] The filtering module 206 is configured to perform a first-order filtering process on the adjusted power generation torque based on the first filter coefficient to obtain the current controlled power generation torque of the range extender at the current moment;

[0112] The transfer module 207 is configured to control the range extender to dynamically transfer from the current actual power generation speed to the current controlled power generation speed, and from the current actual power generation torque to the current controlled power generation torque, thereby completing the dynamic transfer of the range extender's operating point.

[0113] The technical solution provided by the embodiment of the present application is to obtain the current required power generation power and the current actual power generation speed of the range extender at the current moment through the first acquisition module 201, and determine the current expected power generation speed and the current expected power generation torque of the range extender based on the required power generation power; the first determination module 202 determines the current control power generation speed of the range extender at the current moment based on the current actual power generation speed and the current expected power generation speed; the second acquisition module 203 obtains and determines the target adjustment coefficient based on the accelerator pedal opening signal and the power battery SOC signal, and the target adjustment coefficient is related to the power demand of the whole vehicle; the second determination module 204 determines the adjustment power generation speed based on the current control power generation speed, the current expected power generation torque and the target adjustment coefficient. electric torque; the third acquisition module 205 acquires the current engine coolant temperature of the range extender at the current moment, and determines the first filter coefficient according to the current engine coolant temperature; the filtering module 206 performs a first-order filtering process on the adjusted power generation torque based on the first filter coefficient to obtain the current controlled power generation torque of the range extender at the current moment; the transfer module 207 controls the range extender to dynamically transfer from the current actual power generation speed to the current controlled power generation speed, and dynamically transfers the current actual power generation torque to the current controlled power generation torque, thereby completing the dynamic transfer of the working point of the range extender, which can achieve the simultaneous consideration of the power generation efficiency, power generation power stability and power output response rate of the range extender in complex scenarios, thereby achieving the optimization of the comprehensive performance.

[0114] In some embodiments, Figure 2 The first determining module 202 may include:

[0115] a determining unit configured to determine a second filter coefficient based on a current actual power generation speed and a current expected power generation speed;

[0116] The filtering unit is configured to perform a first-order filtering process on the current desired power generation speed based on the second filter coefficient to obtain the current controlled power generation speed of the range extender at the current moment.

[0117] In some embodiments, the determining unit may include:

[0118] a calculation component configured to calculate a speed difference between a current actual power generation speed and a current expected power generation speed;

[0119] a first determining component configured to determine, if the speed difference is greater than or equal to zero, a second filter coefficient corresponding to the current actual power generation speed based on a preset first correlation between the range extender power generation speed and the filter coefficient;

[0120] The second determining component is configured to determine a second filter coefficient corresponding to the current actual power generation speed based on a preset second correlation relationship between the range extender power generation speed and the filter coefficient if the speed difference is less than zero.

[0121] In some embodiments, the first correlation between the range extender generator speed and the filter coefficient is determined by the following steps:

[0122] Get the maximum design power generation speed and the minimum design power generation speed of the range extender;

[0123] Based on the preset first optimization objective, calibrate a series of second filter coefficients of the range extender at different actual power generation speeds, wherein the actual power generation speed is within the power generation speed range from the lowest design power generation speed to the highest design power generation speed;

[0124] A correspondence between the actual power generation speed and the second filter coefficient is established to determine a first correlation between the power generation speed of the range extender and the filter coefficient, wherein the second filter coefficient corresponding to the actual power generation speed shows a downward trend in an area close to the maximum design power generation speed and in an area close to the minimum design power generation speed.

[0125] In some embodiments, Figure 2 The second determining module 204 may include:

[0126] A query unit is configured to query and obtain a maximum efficiency point torque corresponding to a currently controlled power generation speed;

[0127] The calculation unit is configured to perform a weighted calculation on the maximum efficiency point torque and the current expected power generation torque based on the target adjustment coefficient to obtain the adjusted power generation torque.

[0128] In some embodiments, Figure 2 The filtering module 206 in may include:

[0129] an acquisition unit configured to acquire a previous controlled power generation torque of the range extender at a previous moment and a current actual power generation torque at a current moment;

[0130] The calculation unit is configured to perform a weighted operation on the current desired power generation torque and the previous controlled power generation torque according to the first filter coefficient to obtain the current controlled power generation torque of the range extender at the current moment.

[0131] In some embodiments, Figure 2 The second acquisition module 203 may include:

[0132] A first search unit is configured to search for a series of first adjustment coefficients according to the accelerator pedal opening signal;

[0133] A second search unit is configured to search for a series of second adjustment coefficients according to the power battery SOC signal;

[0134] The searching unit is configured to search for an intersection coefficient between the first adjustment coefficient and the second adjustment coefficient, and determine the intersection coefficient as a target adjustment coefficient.

[0135] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0136] An embodiment of the present application further provides a vehicle, comprising a range extender operating point dynamic transfer device, and a range extender controlled by the range extender operating point dynamic transfer device.

[0137] Figure 3 Schematic diagram of the electronic device 3 provided in the embodiment of the present application. Figure 3 As shown, the electronic device 3 of this embodiment includes: a processor 301, a memory 302, and a computer program 303 stored in the memory 302 and executable by the processor 301. When the processor 301 executes the computer program 303, the steps of the above-mentioned method embodiments are implemented. Alternatively, when the processor 301 executes the computer program 303, the functions of the modules / units in the above-mentioned device embodiments are implemented.

[0138] The electronic device 3 may be a desktop computer, a notebook, a PDA, a cloud server or other electronic device. The electronic device 3 may include but is not limited to a processor 301 and a memory 302. Those skilled in the art will understand that Figure 3This is merely an example of the electronic device 3 and does not limit the electronic device 3 . The electronic device 3 may include more or fewer components than shown in the figure, or different components.

[0139] The processor 301 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0140] Memory 302 can be an internal storage unit of electronic device 3, such as a hard drive or memory of electronic device 3. Memory 302 can also be an external storage device of electronic device 3, such as a plug-in hard drive, a Smart Media Card (SMC), a Secure Digital (SD) card, a flash memory card, etc. Memory 302 can also include both an internal storage unit of electronic device 3 and an external storage device. Memory 302 is used to store computer programs and other programs and data required by the electronic device.

[0141] Those skilled in the art will clearly understand that for the sake of convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

[0142] If the integrated modules / units are implemented as software functional units and sold or used as independent products, they can be stored in a readable storage medium (e.g., a computer-readable storage medium). Based on this understanding, the present application can implement all or part of the process steps in the above-mentioned method embodiments by using a computer program to instruct the relevant hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, the computer program can implement the steps of each of the above-mentioned method embodiments. The computer program can include computer program code, which can be in source code form, object code form, executable file, or some intermediate form. Computer-readable storage media can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, removable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunications signals, and software distribution media.

[0143] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A method for dynamically transferring the operating point of a range extender, characterized in that: include: Obtaining a current required power generation power and a current actual power generation speed of the range extender at a current moment, and determining a current expected power generation speed and a current expected power generation torque of the range extender based on the required power generation power; Determining a current controlled power generation speed of the range extender at a current moment based on the current actual power generation speed and the current expected power generation speed; Obtaining and determining a target adjustment coefficient based on an accelerator pedal opening signal and a power battery SOC signal, wherein the target adjustment coefficient is related to the vehicle power demand; determining an adjusted power generation torque according to the current controlled power generation speed, the current expected power generation torque, and the target adjustment coefficient; Obtaining a current engine coolant temperature of the range extender at a current moment, and determining a first filter coefficient according to the current engine coolant temperature; performing first-order filtering on the adjusted power generation torque based on the first filter coefficient to obtain a current controlled power generation torque of the range extender at the current moment; The range extender is controlled to dynamically transfer from the current actual power generation speed to the current controlled power generation speed, and from the current actual power generation torque to the current controlled power generation torque, thereby completing the dynamic transfer of the operating point of the range extender.

2. The method according to claim 1, characterized in that Determining a current controlled power generation speed of the range extender at a current moment based on the current actual power generation speed and the current expected power generation speed includes: determining a second filter coefficient based on the current actual power generation speed and the current expected power generation speed; Based on the second filter coefficient, a first-order filter process is performed on the current desired power generation speed to obtain the current controlled power generation speed of the range extender at the current moment.

3. The method according to claim 2, characterized in that Determining a second filter coefficient based on the current actual power generation speed and the current expected power generation speed includes: Calculating a speed difference between the current actual power generation speed and the current expected power generation speed; If the speed difference is greater than or equal to zero, determining a second filter coefficient corresponding to the current actual power generation speed based on a preset first correlation between the range extender power generation speed and the filter coefficient; If the speed difference is less than zero, a second filter coefficient corresponding to the current actual power generation speed is determined based on a preset second correlation between the range extender power generation speed and the filter coefficient.

4. The method according to claim 3, characterized in that The first correlation between the range extender power generation speed and the filter coefficient is determined by the following steps: Obtaining the maximum design power generation speed and the minimum design power generation speed of the range extender; Based on a preset first optimization objective, calibrate a series of second filter coefficients of the range extender at different actual power generation speeds, wherein the actual power generation speed is within a power generation speed interval from the minimum design power generation speed to the maximum design power generation speed; A correspondence between the actual power generation speed and the second filter coefficient is established to determine a first correlation between the power generation speed of the range extender and the filter coefficient, wherein the second filter coefficient corresponding to the actual power generation speed shows a downward trend in an area close to the maximum design power generation speed and in an area close to the minimum design power generation speed.

5. The method according to claim 1, wherein Determining the adjusted generating torque according to the current controlled generating speed, the current expected generating torque, and the target adjustment coefficient includes: querying and obtaining the maximum efficiency point torque corresponding to the currently controlled generating speed; Based on the target adjustment coefficient, a weighted operation is performed on the maximum efficiency point torque and the current expected power generation torque to obtain the adjusted power generation torque.

6. The method according to claim 1, characterized in that Based on the first filter coefficient, a first-order filter process is performed on the adjusted power generation torque to obtain the current controlled power generation torque of the range extender at the current moment, including: Obtaining the last controlled power generation torque of the range extender at the last moment and the current actual power generation torque at the current moment; According to the first filter coefficient, a weighted operation is performed on the current expected power generation torque and the previous controlled power generation torque to obtain the current controlled power generation torque of the range extender at the current moment.

7. The method according to claim 1, characterized in that According to the accelerator pedal opening signal and the power battery SOC signal, the target adjustment coefficient is determined, including: Finding a series of first adjustment coefficients according to the accelerator pedal opening signal; Finding a series of second adjustment coefficients according to the power battery SOC signal; An intersection coefficient between the first adjustment coefficient and the second adjustment coefficient is found, and the intersection coefficient is determined as a target adjustment coefficient.

8. A range extender operating point dynamic transfer device, characterized in that: include: a first acquisition module configured to acquire a current required power generation power and a current actual power generation speed of the range extender at a current moment, and determine a current expected power generation speed and a current expected power generation torque of the range extender based on the required power generation power; a first determining module configured to determine a current controlled power generation speed of the range extender at a current moment based on the current actual power generation speed and the current expected power generation speed; a second acquisition module configured to acquire and determine a target adjustment coefficient based on an accelerator pedal opening signal and a power battery SOC signal, wherein the target adjustment coefficient is related to a vehicle power demand; a second determining module configured to determine an adjusted generating torque according to the current controlled generating speed, the current expected generating torque and the target adjustment coefficient; a third acquisition module configured to acquire a current engine coolant temperature of the range extender at a current moment, and determine a first filter coefficient according to the current engine coolant temperature; a filtering module configured to perform a first-order filtering process on the adjusted power generation torque based on the first filtering coefficient to obtain a current controlled power generation torque of the range extender at a current moment; The transfer module is configured to control the range extender to dynamically transfer from the current actual power generation speed to the current controlled power generation speed, and dynamically transfer from the current actual power generation torque to the current controlled power generation torque, thereby completing the dynamic transfer of the operating point of the range extender.

9. A vehicle, characterized in that: The vehicle comprises: the range extender operating point dynamic transfer device according to claim 8, and a range extender controlled by the range extender operating point dynamic transfer device.

10. A readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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