Camping mode control method and device, and extended-range electric vehicle

Abstract

The application relates to the technical field of new energy vehicles, and provides a camping mode control method and device and a range-extended electric vehicle. The method comprises the following steps: receiving a camping mode request sent by a user through a vehicle information and entertainment system, wherein the vehicle information and entertainment system is arranged on the range-extended electric vehicle; judging whether the gear of the range-extended electric vehicle is in a P gear; when the gear is in the P gear, controlling the range-extended electric vehicle to enter a static camping mode; when the gear is not in the P gear, controlling the range-extended electric vehicle to enter a dynamic camping mode, which comprises the following steps: acquiring real-time electric quantity of the range-extended electric vehicle and a preset target electric quantity, taking a result obtained by subtracting the target electric quantity from the real-time electric quantity as an electric quantity difference value, and controlling a range extender of the range-extended electric vehicle according to the electric quantity difference value. The application solves the problem that there is no control method for the camping mode of the range-extended electric vehicle in the prior art.

Description

Technical Field

[0001] This application relates to the field of new energy vehicle technology, and in particular to a camping mode control method, device and range-extended electric vehicle. Background Technology

[0002] With the increasing acceptance and use of new energy vehicles by users, and the booming development of the camping economy, the scenario of driving new energy vehicles for camping is becoming more and more common. In order to achieve more efficient control of new energy vehicles in the above scenarios, there is an urgent need for a control method for new energy vehicles in camping mode.

[0003] Because range-extended electric vehicles (REEVs) primarily rely on pure electric power for driving, supplemented by a range extender for electricity generation, this powertrain allows for better control when using a dedicated camping mode for outdoor camping trips. However, current technology lacks specific control methods for REEVs in camping mode. Summary of the Invention

[0004] In view of this, embodiments of this application provide a camping mode control method, device, and range-extended electric vehicle to solve the problem that there is a lack of control methods for camping modes of range-extended electric vehicles in the prior art.

[0005] A first aspect of this application provides a camping mode control method, comprising: receiving a camping mode request sent by a user through an in-vehicle infotainment system, wherein the in-vehicle infotainment system is installed on a range-extended electric vehicle; determining whether the range-extended electric vehicle is in park (P) gear; when in park (P), controlling the range-extended electric vehicle to enter a static camping mode; when not in park (P), controlling the range-extended electric vehicle to enter a dynamic camping mode, comprising: acquiring the real-time battery level of the range-extended electric vehicle and a preset target battery level, subtracting the target battery level from the real-time battery level as a battery difference, and controlling the range extender of the range-extended electric vehicle according to the battery difference.

[0006] A second aspect of this application provides a camping mode control device, comprising: a receiving module configured to receive a camping mode request sent by a user through an in-vehicle infotainment system, wherein the in-vehicle infotainment system is installed on a range-extended electric vehicle; a judging module configured to judge whether the range-extended electric vehicle is in P gear; a first control module configured to control the range-extended electric vehicle to enter a static camping mode when it is in P gear; and a second control module configured to control the range-extended electric vehicle to enter a dynamic camping mode when it is not in P gear: acquiring the real-time battery level of the range-extended electric vehicle and a preset target battery level, subtracting the target battery level from the real-time battery level as a battery difference, and controlling the range extender of the range-extended electric vehicle according to the battery difference.

[0007] A third aspect of this application provides a range-extended electric vehicle, including a memory, a main control module, and a computer program stored in the memory and executable on the main control module. When the main control module executes the computer program, it implements the steps of the method described above.

[0008] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method as described in any of the preceding claims.

[0009] The beneficial effects of this application embodiment compared with the prior art include at least the following: This application embodiment receives a camping mode request sent by a user through the in-vehicle infotainment system, determines whether the range-extended electric vehicle is in P gear; when in P gear, controls the range-extended electric vehicle to enter static camping mode; when not in P gear, controls the range-extended electric vehicle to enter dynamic camping mode, including: obtaining the real-time battery level and a preset target battery level of the range-extended electric vehicle, subtracting the target battery level from the real-time battery level as the battery difference, and controlling the range extender of the range-extended electric vehicle according to the battery difference. Therefore, by adopting the above technical means, the problem of lacking a control method for camping mode of range-extended electric vehicles in the prior art can be solved, thereby improving the control efficiency of range-extended electric vehicles, meeting user needs, improving comfort, and covering more usage scenarios. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a flowchart illustrating a camping mode control method provided in an embodiment of this application;

[0012] Figure 2 This is a flowchart illustrating a method for controlling the range extender when a range-extended electric vehicle is towing a caravan, as provided in an embodiment of this application.

[0013] Figure 3 This is a power line graph provided in an embodiment of this application;

[0014] Figure 4 This is a schematic diagram of the structure of a camping mode control device provided in an embodiment of this application;

[0015] Figure 5This is a schematic diagram of the structure of a device for controlling the range extender when a range-extended electric vehicle is towing a caravan, as provided in an embodiment of this application.

[0016] Figure 6 This is a schematic diagram of the structure of a range-extended electric vehicle provided in an embodiment of this application. Detailed Implementation

[0017] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0018] This application embodiment requires setting both a dynamic camping mode and a static camping mode in advance.

[0019] The dynamic camping mode can be set up by enabling the in-vehicle infotainment system, main control module, air conditioning system and body controller, while disabling the on-board charger.

[0020] Allowing the in-vehicle infotainment system to be enabled includes allowing the in-vehicle infotainment system to send information to the main control module to indicate the selection of camping mode, requests to exit dynamic camping mode, and other entertainment information; allowing the main control module to be enabled includes allowing the main control module to control the range-extended electric vehicle to exit dynamic camping mode and control the range extender of the range-extended electric vehicle; allowing the air conditioning system to be enabled includes allowing the air conditioning system to control the air conditioning on the range-extended electric vehicle; allowing the body controller to be enabled includes allowing the body controller to control the seats on the range-extended electric vehicle; disabling the on-board charger to be enabled includes disabling the on-board charger to control the battery to supply power to external systems.

[0021] The vehicle body controller controls the seats, including controlling seat heating, adjustment, and massage functions. The air conditioning system controls the air conditioning, including controlling cooling, heating, and dehumidification functions.

[0022] In this embodiment of the application, the information used to indicate the selection of camping mode may be to instruct the main control module to control the range-extended electric vehicle to switch from dynamic camping mode to static camping mode; other entertainment information may include playing music, playing videos, playing games, controlling volume, etc.

[0023] Setting up a static camping mode includes enabling the in-vehicle infotainment system, main control module, air conditioning system, body controller, and on-board charger.

[0024] Allowing the in-vehicle infotainment system to be enabled includes allowing the in-vehicle infotainment system to send information to the main control module to indicate the selection of camping mode, requests to exit static camping mode, and other entertainment information; allowing the main control module to be enabled includes allowing the main control module to control the range-extended electric vehicle to exit static camping mode and to control the range extender of the range-extended electric vehicle; allowing the air conditioning system to be enabled includes allowing the air conditioning system to control the air conditioning on the range-extended electric vehicle; allowing the body controller to be enabled includes allowing the body controller to control the seats on the range-extended electric vehicle; allowing the on-board charger to be enabled includes allowing the on-board charger to control the battery to supply power to external devices.

[0025] In this embodiment of the application, the information used to indicate the selection of camping mode may be an instruction to the main control module to control the range-extended electric vehicle to switch from static camping mode to dynamic static camping mode.

[0026] Static camping mode can be understood as the camping mode activated when the range-extended electric vehicle is parked; dynamic static camping mode can be understood as the camping mode activated while the range-extended electric vehicle is in motion.

[0027] Figure 1 This is a flowchart illustrating a camping mode control method provided in an embodiment of this application. Figure 1 The camping mode control method can be executed by the main control module installed on the range-extended electric vehicle. Optionally, Figure 1 The camping mode control method can also be executed by a computer or server, or by software on a computer or server. Taking the main control module as the executing entity as an example, the camping mode control method includes:

[0028] S101 receives a camping mode request sent by a user through the in-vehicle infotainment system, wherein the in-vehicle infotainment system is installed on the range-extended electric vehicle;

[0029] S102, determine whether the range-extended electric vehicle is in P gear;

[0030] S103, when in P gear, controls the range-extended electric vehicle to enter static camping mode;

[0031] S104, when in a non-P gear, control the range-extended electric vehicle to enter dynamic camping mode, including: acquiring the real-time battery level and a preset target battery level of the range-extended electric vehicle, subtracting the target battery level from the real-time battery level as the battery difference, and controlling the range extender of the range-extended electric vehicle according to the battery difference.

[0032] Specifically, the main control module receives a camping mode request sent by the user through the in-vehicle infotainment system. This request can be sent by the user via a soft switch or voice assistant. The in-vehicle infotainment system then forwards the received camping mode request to the main control module. The camping mode request instructs the main control module to activate the camping mode of the extended-range electric vehicle. Camping modes are divided into static camping mode and dynamic camping mode. Upon receiving the camping mode request, the main control module determines whether the extended-range electric vehicle is in Park (P) gear. If it is in Park, it activates or enters static camping mode; otherwise, it activates or enters dynamic camping mode. Park (P) gear is also known as the parking gear, holding gear, or valet gear.

[0033] According to the technical solution provided in this application embodiment, a camping mode request sent by a user through the in-vehicle infotainment system is received, and it is determined whether the range-extended electric vehicle is in P gear. When it is in P gear, the range-extended electric vehicle is controlled to enter a static camping mode; when it is not in P gear, the range-extended electric vehicle is controlled to enter a dynamic camping mode. This includes: obtaining the real-time battery level and a preset target battery level of the range-extended electric vehicle, subtracting the target battery level from the real-time battery level as the battery difference, and controlling the range extender of the range-extended electric vehicle according to the battery difference. Therefore, by adopting the above technical means, the problem of lacking a control method for the camping mode of range-extended electric vehicles in the prior art can be solved, thereby improving the control efficiency of range-extended electric vehicles, meeting user needs, improving comfort, and covering more usage scenarios.

[0034] Range-extended electric vehicles are equipped with a main control module, an air conditioning system, a body controller, and an on-board charger.

[0035] Furthermore, when the range-extended electric vehicle is not towing a caravan, the range extender of the range-extended electric vehicle is controlled according to the power difference, including: when the power difference is greater than or equal to zero, the range extender is prohibited from starting, and the range-extended electric vehicle is controlled to drive purely on electric power; when the power difference is greater than or equal to a first threshold and less than zero, the range extender is controlled to generate electricity at a first power level; when the power difference is greater than or equal to a second threshold and less than the first threshold, the range extender is controlled to generate electricity at a second power level, wherein the first power and the second power vary according to the vehicle speed of the range-extended electric vehicle, and the first power and the second power are each determined by a target power line related to the vehicle speed; when the power difference is less than the second threshold, the range extender is controlled to generate electricity at a third level, following the total power consumption of the range-extended electric vehicle.

[0036] Controlling the pure electric driving of a range-extended electric vehicle (REEV) means that the REEV relies entirely on its built-in battery for power, with the range extender not activated. Controlling the range extender to generate electricity in three stages, based on the overall power consumption of the REEV, can be understood as the range extender generating the same amount of electricity as the REEV consumes.

[0037] The power consumption of a vehicle can also be understood as the driving power required for the vehicle to travel at a constant speed.

[0038] In one optional embodiment, the method includes: determining the resistance power line corresponding to the range-extended electric vehicle, wherein the resistance power line is composed of the resistance power corresponding to the range-extended electric vehicle at different vehicle speeds, and the resistance power at a vehicle speed is the total power consumed by the range-extended electric vehicle at that vehicle speed; setting the primary power generation, the secondary power generation, and the tertiary power generation according to the resistance power line, and a first threshold and a second threshold for distinguishing the primary power generation, the secondary power generation, and the tertiary power generation.

[0039] Within the range where the power difference is greater than or equal to the first threshold and less than zero, the range extender is controlled to generate power at the first level. Because there is additional power consumption during vehicle operation due to acceleration, braking, and high-voltage accessories, the first-level power generation is higher than the power of the vehicle at a constant speed. Tests have shown that this power basically meets the battery power maintenance function under different vehicle speed conditions. When the operating conditions are severe and the power difference is large, the range extender is controlled to switch to the second-level power generation (corresponding to the range where the power difference is greater than or equal to the second threshold and less than the first threshold). This power can meet the use under different vehicle speed conditions and allows the battery power to rise slowly. When the power difference is less than the second threshold, the third-level power generation is performed, following the power consumption of the range-extended electric vehicle to keep the battery power from decreasing.

[0040] Determining the resistance power line corresponding to the range-extended electric vehicle includes: obtaining the speed range corresponding to each vehicle speed; controlling the range-extended electric vehicle to drive within the speed range corresponding to each vehicle speed by means of a coasting test to obtain the resistance power corresponding to the range-extended electric vehicle at that vehicle speed; and using the resistance power corresponding to the range-extended electric vehicle at each vehicle speed to form the resistance power line.

[0041] Within each speed range corresponding to a vehicle speed, the range-extended electric vehicle is controlled to travel by a coasting test method. This can be achieved by controlling the range-extended electric vehicle to decelerate uniformly from the maximum value of the speed range to the minimum value of the speed range, and calculating the average power consumed by the entire vehicle during this process as the resistance power of the range-extended electric vehicle at that speed.

[0042] Figure 3This is a power line graph provided in an embodiment of this application, such as... Figure 3 As shown, it includes:

[0043] The horizontal axis of the line graph represents vehicle speed V, in km / h, and the vertical axis represents power P, in kW.

[0044] The line graph contains three lines: the resistance power line, the first power line, and the second power line, each with a corresponding target power line. In the line graph, "Level 1 Power Generation" represents the target power line corresponding to the first power, and "Level 2 Power Generation" represents the target power line corresponding to the second power. A point on each line represents a vehicle speed and its corresponding power.

[0045] At the same speed, the power corresponding to the target power line of the first power is less than the power corresponding to the target power line of the second power. The target power line corresponding to the first power is only used to provide information about the vehicle's electrical consumption, while the target power line corresponding to the second power is used to provide information about the vehicle's electrical consumption and to slowly charge the battery.

[0046] When the power difference is less than zero, the range extender is controlled to generate electricity at the corresponding level according to the range in which the power difference falls. This embodiment divides the case of a power difference less than zero into three ranges, providing three levels of power generation to meet the power consumption needs of range-extended electric vehicles under various conditions and improve energy efficiency.

[0047] In an alternative embodiment, a method is also provided for controlling the range extender of the range-extended electric vehicle based on the battery charge difference when the range-extended electric vehicle is towing a caravan.

[0048] Figure 2 This is a flowchart illustrating a method for controlling a range extender when a range-extended electric vehicle is towing a caravan, as provided in an embodiment of this application. Figure 2 As shown, it includes:

[0049] S201, calculate the total mass of range-extended electric vehicles and motorhomes;

[0050] S202, obtain the mass of the range-extended electric vehicle and calculate the ratio of the total mass to the mass of the range-extended electric vehicle, and use this ratio as the mass increase coefficient;

[0051] S203, the result of multiplying the first power by the mass increase factor is taken as the third power, and the result of multiplying the second power by the mass increase factor is taken as the fourth power;

[0052] S204: When the power difference is greater than or equal to zero, the range extender is prohibited from starting, and the range-extended electric vehicle is controlled to drive in pure electric mode.

[0053] S205, when the power difference is greater than or equal to the first threshold and less than zero, control the range extender to generate power at the third power level;

[0054] S206, when the power difference is greater than or equal to the second threshold and less than the first threshold, control the range extender to generate power at the fourth power level for secondary power generation;

[0055] S207: When the power difference is less than the second threshold, the range extender is controlled to generate electricity in three stages, following the power consumption of the entire range-extended electric vehicle.

[0056] The first and second power ratings are set based on the mass of the range-extended electric vehicle (REEV), corresponding to primary and secondary power generation when only the REEV is present. When the REEV is towed with a caravan, to avoid rapid battery drain and excessive vibration and noise caused by the range extender entering high-power generation, the third power rating for primary power generation and the fourth power rating for secondary power generation need to be reset based on the total mass of the REEV and the caravan. In this embodiment, a mass increase coefficient is calculated based on the total mass and the REEV's mass. Then, based on this coefficient, the first and second power ratings (when the REEV is not towed with a caravan) are converted to the third and fourth power ratings (when the REEV is towed with a caravan). When the REEV is towed with a caravan, the third and fourth power ratings are determined by the mass increase coefficient, effectively avoiding the problem of rapid battery drain caused by increased resistance from towing the caravan. Through these technical means, the control efficiency when the REEV is towed with a caravan is improved, meeting user needs, enhancing comfort, and covering more usage scenarios.

[0057] Range-extended electric vehicle caravans can be viewed as caravans in general.

[0058] Calculate the acceleration and driving force of the range-extended electric vehicle towing caravan in two states, with each state's acceleration and driving force considered as one set. Calculate the total mass of the range-extended electric vehicle and the caravan based on the two sets of acceleration and driving force, using the following specific method:

[0059] Step 1: Calculate the first-state acceleration a1 of the towed caravan in dynamic camping mode, specifically in state 1:

[0060] a1=((V+ΔV)-(V-ΔV)) / t1

[0061] Where a1 is the acceleration from V-ΔV to V+ΔV, t1 is the acceleration time, and ΔV needs to be less than or equal to 2km / h, so that the acceleration interval is short. The driving force and resistance during the process are assumed to remain unchanged, ensuring the accuracy of the calculation.

[0062] Step 2: Calculate the second-state acceleration a2 of the towed caravan in dynamic camping mode, specifically in state 2:

[0063] a2=((V+ΔV)-(V-ΔV)) / t2

[0064] Where a2 is the acceleration from V-ΔV to V+ΔV, and t2 is the acceleration time;

[0065] Step 3: Calculate the total mass M

[0066] M*(a1-a2)=F1-F2

[0067] M = (F1 - F2) / (a1 - a2)

[0068] F1 is the driving force of the towed caravan in state 1, which can be calculated using the formula:

[0069] F1=T1*i*ig*r*η

[0070] T1 is the driving torque of the motor in state 1, i is the gearbox transmission ratio in state 1, ig is the final drive ratio in state 1, r is the tire radius in state 1, and η is the transmission efficiency in state 1.

[0071] F2 is the driving force of the entire vehicle in state 2, which can be calculated using the formula:

[0072] F2=T2*i*ig*r*η

[0073] T2 is the driving torque of the motor in state 2, i is the gearbox transmission ratio in state 2, ig is the final drive ratio in state 2, r is the tire radius in state 2, and η is the transmission efficiency in state 2.

[0074] State 1 and State 2 represent two states of the towed caravan, which can be seen as two accelerations of the towed caravan.

[0075] Calculate the mass increase factor k of the RV

[0076] Where k = M / m, and m is the mass of the range-extended electric vehicle.

[0077] This application's embodiments divide the situation where the power difference is less than zero into three intervals, providing three levels of power generation, thereby meeting the power consumption needs of range-extended electric vehicle trailers under various conditions and improving energy utilization efficiency.

[0078] Furthermore, when in P gear, controlling the range-extended electric vehicle to enter static camping mode includes: acquiring the real-time battery level of the range-extended electric vehicle; when the real-time battery level is greater than a third threshold, prohibiting the range extender from starting and controlling the battery to supply power externally via the on-board charger; when the real-time battery level is greater than a fourth threshold but less than or equal to the third threshold, starting the range extender to generate electricity and controlling the battery and the electricity generated by the range extender to supply power externally via the on-board charger; when the real-time battery level is less than or equal to the fourth threshold, prohibiting the on-board charger from controlling the battery to supply power externally, controlling the range extender to generate electricity, and using the electricity generated by the range extender to supply power externally and charge the battery on the range-extended electric vehicle.

[0079] The third and fourth thresholds can be preset, for example, the third threshold can be 3% and the fourth threshold can be 1%. When the real-time battery level is greater than the fourth threshold but less than or equal to the third threshold, it is a transition range.

[0080] All of the above-mentioned optional technical solutions can be combined in any way to form the optional embodiments of this application, and will not be described in detail here.

[0081] The following are embodiments of the apparatus described in this application, which can be used to execute the embodiments of the method described in this application. For details not disclosed in the apparatus embodiments of this application, please refer to the embodiments of the method described in this application.

[0082] Figure 4 This is a schematic diagram of a camping mode control device provided in an embodiment of this application. Figure 4 As shown, the camping mode control device includes:

[0083] The receiving module 401 is configured to receive a camping mode request sent by a user through an in-vehicle infotainment system, wherein the in-vehicle infotainment system is installed on a range-extended electric vehicle.

[0084] The judgment module 402 is configured to determine whether the range-extended electric vehicle is in P gear;

[0085] The first control module 403 is configured to control the range-extended electric vehicle to enter the static camping mode when it is in P gear.

[0086] The second control module 404 is configured to control the range-extended electric vehicle to enter dynamic camping mode when it is not in P gear, including: acquiring the real-time battery level and the preset target battery level of the range-extended electric vehicle, subtracting the target battery level from the real-time battery level as the battery difference, and controlling the range extender of the range-extended electric vehicle according to the battery difference.

[0087] According to the technical solution provided in this application embodiment, by receiving a camping mode request sent by a user through the in-vehicle infotainment system, it is determined whether the range-extended electric vehicle is in P gear; when it is in P gear, the range-extended electric vehicle is controlled to enter static camping mode; when it is not in P gear, the range-extended electric vehicle is controlled to enter dynamic camping mode. This includes: acquiring the real-time battery level of the range-extended electric vehicle and a preset target battery level; subtracting the target battery level from the real-time battery level as the battery difference; and controlling the range extender of the range-extended electric vehicle based on the battery difference. Therefore, by adopting the above technical means, the problem of lacking a control method for camping mode of range-extended electric vehicles in the prior art can be solved, thereby improving the control efficiency of range-extended electric vehicles.

[0088] Range-extended electric vehicles are equipped with a main control module, an air conditioning system, a body controller, and an on-board charger.

[0089] Optionally, the second control module 404 is further configured to: prohibit the range extender from starting when the power difference is greater than or equal to zero, and control the range-extended electric vehicle to drive in pure electric mode; control the range extender to perform first-level power generation at a first power when the power difference is greater than or equal to a first threshold and less than zero; control the range extender to perform second-level power generation at a second power when the power difference is greater than or equal to a second threshold and less than the first threshold, wherein the first power and the second power vary according to the vehicle speed of the range-extended electric vehicle, and the first power and the second power are each determined by a target power line related to vehicle speed; and control the range extender to perform third-level power generation following the total power consumption of the range-extended electric vehicle when the power difference is less than the second threshold.

[0090] Controlling the pure electric driving of a range-extended electric vehicle (REEV) means that the REEV relies entirely on its built-in battery for power, with the range extender not activated. Controlling the range extender to generate electricity in three stages, based on the overall power consumption of the REEV, can be understood as the range extender generating the same amount of electricity as the REEV consumes.

[0091] The power consumption of a vehicle can also be understood as the driving power required for the vehicle to travel at a constant speed.

[0092] Optionally, the second control module 404 is further configured to determine the resistance power line corresponding to the range-extended electric vehicle, wherein the resistance power line is composed of the resistance power corresponding to the range-extended electric vehicle at different vehicle speeds, and the resistance power at a vehicle speed is the total power consumed by the range-extended electric vehicle at that vehicle speed; and to set the primary power generation, the secondary power generation, and the tertiary power generation according to the resistance power line, as well as a first threshold and a second threshold for distinguishing the primary power generation, the secondary power generation, and the tertiary power generation.

[0093] Within the range where the power difference is greater than or equal to the first threshold and less than zero, the range extender is controlled to generate power at the first level. Because there is additional power consumption during vehicle operation due to acceleration, braking, and high-voltage accessories, the first-level power generation is higher than the power of the vehicle at a constant speed. Tests have shown that this power basically meets the battery power maintenance function under different vehicle speed conditions. When the operating conditions are severe and the power difference is large, the range extender is controlled to switch to the second-level power generation (corresponding to the range where the power difference is greater than or equal to the second threshold and less than the first threshold). This power can meet the use under different vehicle speed conditions and allows the battery power to rise slowly. When the power difference is less than the second threshold, the third-level power generation is performed, following the power consumption of the range-extended electric vehicle to keep the battery power from decreasing.

[0094] Optionally, the second control module 404 is further configured to acquire the speed range corresponding to each vehicle speed; within the speed range corresponding to each vehicle speed, control the range-extended electric vehicle to drive by means of a coasting test to obtain the resistance power corresponding to the range-extended electric vehicle at that vehicle speed; and use the resistance power corresponding to the range-extended electric vehicle at each vehicle speed to form the resistance power line.

[0095] Within each speed range corresponding to a vehicle speed, the range-extended electric vehicle is controlled to travel by a coasting test method. This can be achieved by controlling the range-extended electric vehicle to decelerate uniformly from the maximum value of the speed range to the minimum value of the speed range, and calculating the average power consumed by the entire vehicle during this process as the resistance power of the range-extended electric vehicle at that speed.

[0096] When the power difference is less than zero, the range extender is controlled to generate electricity at the corresponding level according to the range in which the power difference falls. This embodiment divides the case of a power difference less than zero into three ranges, providing three levels of power generation to meet the power consumption needs of range-extended electric vehicles under various conditions and improve energy efficiency.

[0097] Optionally, the first control module 403 is further configured to, when in P gear, control the range-extended electric vehicle to enter a static camping mode: acquire the real-time battery level of the range-extended electric vehicle; when the real-time battery level is greater than a third threshold, prevent the range extender from starting and control the battery to supply power externally via the on-board charger; when the real-time battery level is greater than a fourth threshold but less than or equal to the third threshold, start the range extender to generate electricity and control the battery and the electricity generated by the range extender to supply power externally via the on-board charger; when the real-time battery level is less than or equal to the fourth threshold, prevent the on-board charger from controlling the battery to supply power externally, control the range extender to generate electricity, and use the electricity generated by the range extender to supply power externally and charge the battery on the range-extended electric vehicle.

[0098] The third and fourth thresholds can be preset in advance.

[0099] When the real-time battery level is greater than the fourth threshold but less than or equal to the third threshold, it is a transitional zone.

[0100] In an alternative embodiment, a method is also provided for controlling the range extender of the range-extended electric vehicle based on the battery charge difference when the range-extended electric vehicle is towing a caravan.

[0101] Figure 5 This is a schematic diagram of a device for controlling the range extender when a range-extended electric vehicle is towing a caravan, as provided in an embodiment of this application. Figure 5 As shown, it includes:

[0102] The first acquisition module 501 is configured to calculate the total mass of the range-extended electric vehicle and the motorhome;

[0103] The second acquisition module 502 is configured to acquire the mass of the range-extended electric vehicle and calculate the ratio of the total mass to the mass of the range-extended electric vehicle, and use the ratio as the mass increase coefficient.

[0104] The calculation module 503 is configured to multiply the first power by the mass increase factor as the third power, and multiply the second power by the mass increase factor as the fourth power;

[0105] The third control module 504 is configured to prevent the range extender from starting when the power difference is greater than or equal to zero, and to control the range-extended electric vehicle to drive in pure electric mode.

[0106] The fourth control module 504 is configured to control the range extender to generate electricity at the third power level when the power difference is greater than or equal to the first threshold and less than zero.

[0107] The fifth control module 504 is configured to control the range extender to generate electricity at the fourth power level when the power difference is greater than or equal to the second threshold and less than the first threshold.

[0108] The sixth control module 504 is configured to control the range extender to generate electricity in three stages, following the total power consumption of the range-extended electric vehicle, when the power difference is less than the second threshold.

[0109] The first and second power ratings are set based on the mass of the range-extended electric vehicle (REEV), corresponding to primary and secondary power generation when only the REEV is present. When the REEV is towed with a caravan, to avoid rapid battery drain and excessive vibration and noise caused by the range extender entering high-power generation, the third power rating for primary power generation and the fourth power rating for secondary power generation need to be reset based on the total mass of the REEV and the caravan. In this embodiment, a mass increase coefficient is calculated based on the total mass and the REEV's mass. Then, based on this coefficient, the first and second power ratings (when the REEV is not towed with a caravan) are converted to the third and fourth power ratings (when the REEV is towed with a caravan). When the REEV is towed with a caravan, the third and fourth power ratings are determined by the mass increase coefficient, effectively avoiding the problem of rapid battery drain caused by increased resistance from towing the caravan. Through these technical means, the control efficiency when the REEV is towed with a caravan is improved, meeting user needs, enhancing comfort, and covering more usage scenarios.

[0110] Range-extended electric vehicle caravans can be viewed as caravans in general.

[0111] This application's embodiments divide the situation where the power difference is less than zero into three intervals, providing three levels of power generation, thereby meeting the power consumption needs of range-extended electric vehicle trailers under various conditions and improving energy utilization efficiency.

[0112] It should be understood that the sequence number of each step in the above embodiments does not imply 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.

[0113] Figure 6 This is a schematic diagram of the structure of the range-extended electric vehicle 6 provided in an embodiment of this disclosure. Figure 6 As shown, the range-extended electric vehicle 6 of this embodiment includes: a main control module 601, a memory 602, and a computer program 603 stored in the memory 602 and executable on the main control module 601, an air conditioning system 604, a body controller 606, an on-board charger 606, a range extender 607, and an on-board infotainment system 608. When the main control module 601 executes the computer program 603, it implements the steps in the various method embodiments described above. Alternatively, when the main control module 601 executes the computer program 603, it implements the functions of each module / unit in the various device embodiments described above.

[0114] The main control module 601 can be a VCU (Vehicle Control Unit), the in-vehicle infotainment system 608 can be an IVI (In-Vehicle Infotainment), the air conditioning system 604 can be an AC (Air-conditioning), the body controller 606 can be a BCM (Body Control Module), and the on-board charger 606 can be an OBC (On-board charger). The range extender 607 can be any type of range extender applicable to range-extended electric vehicles.

[0115] The memory 602 can be an internal storage unit of the range-extended electric vehicle 6, such as a hard disk or RAM. The memory 602 can also be an external storage device of the range-extended electric vehicle 6, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the range-extended electric vehicle 6. The memory 602 can also include both internal and external storage units of the range-extended electric vehicle 6. The memory 602 is used to store computer programs and other programs and data required by the range-extended electric vehicle.

[0116] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to 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 integrated unit can be implemented in hardware or as a software functional unit.

[0117] If an integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program may include computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium may include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium may be appropriately added to or subtracted according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable medium does not include electrical carrier signals and telecommunication signals.

[0118] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A camping mode control method, characterized in that, include: Receives a camping mode request sent by a user through an in-vehicle infotainment system, wherein the in-vehicle infotainment system is installed on a range-extended electric vehicle; Determine whether the range-extended electric vehicle is in P gear; When in P gear, control the range-extended electric vehicle to enter static camping mode; When the vehicle is not in P gear, the range-extended electric vehicle is controlled to enter the dynamic camping mode, including: obtaining the real-time battery level and the preset target battery level of the range-extended electric vehicle, subtracting the target battery level from the real-time battery level as the battery difference, and controlling the range extender of the range-extended electric vehicle according to the battery difference. The resistance power line corresponding to the range-extended electric vehicle is determined, and a first-level power generation, a second-level power generation, and a third-level power generation are set according to the resistance power line, as well as a first threshold and a second threshold for distinguishing the first-level power generation, the second-level power generation, and the third-level power generation. The resistance power line is composed of the resistance power corresponding to the range-extended electric vehicle at different vehicle speeds, and the resistance power at a vehicle speed is the total vehicle power consumption of the range-extended electric vehicle at that vehicle speed. When it is detected that the range-extended electric vehicle does not have a towed caravan, the range extender of the range-extended electric vehicle is controlled according to the battery difference, including: When the power difference is greater than or equal to the first threshold and less than zero, the range extender is controlled to generate electricity at the first power level. When the power difference is greater than or equal to the second threshold and less than the first threshold, the range extender is controlled to generate power at the second power level for secondary power generation. When the power difference is less than the second threshold, the range extender is controlled to generate electricity in three stages, following the total power consumption of the range-extended electric vehicle. The first power and the second power vary according to the speed of the range-extended electric vehicle. The first power and the second power are each determined by a target power line related to the vehicle speed. The power corresponding to the first power in the target power line is less than the power corresponding to the second power in the target power line. The target power line corresponding to the first power is only used to provide the vehicle's power consumption, while the target power line corresponding to the second power is used to provide the vehicle's power consumption and to slowly charge the battery.

2. The method according to claim 1, characterized in that, When it is detected that the range-extended electric vehicle does not have a towed caravan, the range extender of the range-extended electric vehicle is controlled according to the battery difference, and the system further includes: When the power difference is greater than or equal to zero, the range extender is prohibited from starting, and the range-extended electric vehicle is controlled to drive in pure electric mode.

3. The method according to claim 1, characterized in that, Determining the drag power line corresponding to the range-extended electric vehicle includes: Obtain the speed range corresponding to each vehicle speed; Within each speed range corresponding to a vehicle speed, the range-extended electric vehicle is controlled to drive using a coasting test method to obtain the drag power of the range-extended electric vehicle at that speed. The drag power line is formed by using the drag power corresponding to the range-extended electric vehicle at various vehicle speeds.

4. The method according to claim 1, characterized in that, When the range-extended electric vehicle towed caravan is detected, the range extender of the range-extended electric vehicle is controlled according to the battery power difference, including: When the power difference is greater than or equal to zero, the range extender is prohibited from starting, and the range-extended electric vehicle is controlled to drive in pure electric mode. When the power difference is greater than or equal to the first threshold and less than zero, the range extender is controlled to generate power at the third power level. When the power difference is greater than or equal to the second threshold and less than the first threshold, the range extender is controlled to generate power at the fourth power level for secondary power generation. When the power difference is less than the second threshold, the range extender is controlled to generate electricity in three stages, following the total power consumption of the range-extended electric vehicle.

5. The method according to claim 4, characterized in that, The method further includes: Calculate the acceleration and driving force of the range-extended electric vehicle trailer in two states, with the acceleration and driving force in one state being a set. Calculate the total mass of the range-extended electric vehicle and the RV based on two sets of acceleration and driving force; Obtain the mass of the range-extended electric vehicle and calculate the ratio of the total mass to the mass of the range-extended electric vehicle, using this ratio as the mass increase coefficient; The result of multiplying the first power by the mass increase factor is taken as the third power, and the result of multiplying the second power by the mass increase factor is taken as the fourth power.

6. The method according to claim 1, characterized in that, When in Park (P) gear, controlling the range-extended electric vehicle to enter static camping mode includes: Obtain the real-time battery level of the range-extended electric vehicle; When the real-time battery level is greater than the third threshold, the range extender is prohibited from starting, and the battery on the range-extended electric vehicle is controlled to supply power to the outside via the on-board charger. When the real-time power level is greater than the fourth threshold and less than or equal to the third threshold, the range extender is activated to generate electricity, and the battery and the power generated by the range extender are controlled by the on-board charger to supply power to the outside. When the real-time battery level is less than or equal to the fourth threshold, the on-board charger is prohibited from controlling the battery to supply power to the outside, the range extender is controlled to generate electricity, and the electricity generated by the range extender is used to supply power to the outside and charge the battery.

7. A camping mode control device, characterized in that, The apparatus employs the method according to any one of claims 1 to 6, and the apparatus comprises: A receiving module is configured to receive a camping mode request sent by a user through an in-vehicle infotainment system, wherein the in-vehicle infotainment system is installed on a range-extended electric vehicle; The judgment module is configured to determine whether the range-extended electric vehicle is in P gear; The first control module is configured to control the range-extended electric vehicle to enter a static camping mode when it is in P gear. The second control module is configured to control the range-extended electric vehicle to enter dynamic camping mode when it is not in P gear: obtain the real-time battery level of the range-extended electric vehicle and the preset target battery level, subtract the target battery level from the real-time battery level as the battery difference, and control the range extender of the range-extended electric vehicle according to the battery difference.

8. A range-extended electric vehicle, characterized in that, The system includes a memory, a main control module, and a computer program stored in the memory and executable on the main control module, wherein the main control module executes the computer program to implement the camping mode control method as described in any one of claims 1 to 6.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1 to 6.

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