A control method, controller and electric vehicle

Abstract

The application provides a control method, a controller and an electric vehicle, and belongs to the technical field of electric vehicles. The control method adjusts the energy consumption power of the electric vehicle to ensure the braking capability of the electric vehicle during the process of braking the electric vehicle by a driving system. The control method comprises the following steps: obtaining the road condition information (such as congestion and slope) of a target driving path from current position information to destination information, predicting the predicted energy consumption power and the predicted energy recovery power of the electric vehicle driving along the target driving path, braking the electric vehicle according to the intention of the driver operating the brake pedal during the driving process of the electric vehicle along the target driving path, and adjusting the number of electric equipment to be started and / or the power of the electric equipment already started according to the remaining electric quantity of the electric vehicle, the predicted energy recovery power and the predicted energy consumption power, so as to adjust the actual electric energy consumed by the electric equipment in advance, thereby ensuring the braking capability of the electric vehicle.

Description

Technical Field

[0001] This application relates to the field of electric vehicle technology, and more particularly to a control method, controller, and electric vehicle for an electric vehicle. Background Technology

[0002] With the development of new energy vehicles, energy recovery technology is key to improving driving range. Electric vehicles with energy recovery functions can recover energy during braking by activating the energy recovery function. However, the amount of electricity that the power battery can store is limited. When the remaining power battery has a large amount of charge, it will limit the braking ability of the electric vehicle and affect driving safety. Summary of the Invention

[0003] This application provides a control method, controller, and electric vehicle for an electric vehicle. The method adjusts the energy consumption power of the electric vehicle during the braking process of the drive system to ensure the braking capability of the electric vehicle.

[0004] In a first aspect, embodiments of this application provide a control method for an electric vehicle, comprising the following steps.

[0005] The system acquires the current location and destination information of the electric vehicle, and obtains the predicted energy recovery power and predicted energy consumption power of the electric vehicle based on the road condition information corresponding to the target driving path from the current location to the destination. During the electric vehicle's travel along the target driving path, the system controls the reverse torque output by the drive system to change with the opening of the electric vehicle's brake pedal. During the reverse torque output by the drive system, the system adjusts the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices in the electric vehicle based on the remaining battery power, predicted energy recovery power, and predicted energy consumption power.

[0006] In this embodiment, by acquiring the current location information and destination information of the electric vehicle, the target driving path of the electric vehicle from the current location information to the destination information can be obtained. After acquiring the target driving path of the electric vehicle, based on the road condition information of the target driving path (such as congestion, gradient), the predicted energy consumption power and predicted energy recovery power of the electric vehicle traveling along the target driving path can be predicted. Then, during the electric vehicle's travel along the target driving path, the reverse torque output by the control drive system changes with the opening of the electric vehicle's brake pedal, braking the electric vehicle according to the driver's intention to operate the brake pedal, ensuring the driving experience. In addition, during the reverse torque output by the drive system, the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices in the electric vehicle are adjusted according to the remaining battery power of the electric vehicle, the predicted energy recovery power, and the predicted energy consumption power. That is, the actual electrical energy consumed by the electrical devices is adjusted in advance according to the predicted energy recovery power and energy consumption power, thereby ensuring the braking ability of the electric vehicle and improving the energy recovery efficiency of the electric vehicle.

[0007] Specifically, when an electric vehicle has a large remaining charge, and the recovered energy cannot fully charge the battery, the energy consumption power is increased by increasing the number of devices that need to be turned on and / or the power of already turned-on devices based on the predicted energy recovery power and predicted energy consumption power. This increases the energy consumption power and prevents the braking capacity of the drive system from being limited due to the large remaining charge, thus ensuring driving safety. Conversely, when an electric vehicle has a small remaining charge and requires more recovered energy to charge the battery, the energy consumption power is reduced by decreasing the number of devices that need to be turned on and / or the power of already turned-on devices based on the predicted energy recovery power and predicted energy consumption power. This allows more recovered energy to be charged into the battery, improving the energy recovery efficiency of the electric vehicle.

[0008] In one embodiment of the first aspect, the target driving path is divided into multiple driving segments, and the control method specifically includes: when the electric vehicle is driving along the current driving segment, if the remaining power of the electric vehicle in the current driving segment is greater than the preset power and the road condition information of the next driving segment is detected to be congested, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have been turned on are increased.

[0009] In this embodiment, when an electric vehicle enters congested traffic, it needs to accelerate and decelerate frequently, and the drive system recovers energy with each deceleration. If the electric vehicle has a significant amount of remaining battery power in the current road segment and the next road segment is detected to be congested, the energy consumption power is increased by increasing the number of electrical devices that need to be turned on and / or the power of already turned-on devices. This balances the energy consumption power and energy recovery power after the electric vehicle enters congested traffic, preventing the braking capacity of the drive system from being limited due to a large amount of remaining battery power, thus ensuring driving safety.

[0010] In one embodiment of the first aspect, the control method specifically includes: when the electric vehicle is traveling on the current driving segment, if the remaining battery power of the electric vehicle on the current driving segment is greater than a preset battery power and the road condition information of the next driving segment is detected as uphill, reducing the number of electrical devices that need to be turned on and / or the power of the electrical devices that have already been turned on; when the electric vehicle is traveling along the current driving segment, if the remaining battery power of the electric vehicle on the current driving segment is greater than a preset battery power and the road condition information of the next driving segment is detected as downhill, increasing the number of electrical devices that need to be turned on and / or the power of the electrical devices that have already been turned on.

[0011] In this embodiment, after the electric vehicle enters an uphill section, it needs to continuously output power to overcome gravity and climb the hill. The predicted energy recovery power is low or zero, while the predicted energy consumption power is high. If the electric vehicle has a significant amount of remaining battery power in the current road segment and the road condition information for the next segment is detected as uphill, the energy consumption power is reduced by decreasing the number of electrical devices that need to be turned on and / or the power of already turned-on electrical devices. This prevents excessive power consumption after the electric vehicle enters the uphill section.

[0012] Furthermore, when an electric vehicle enters a downhill section of road, it can recover not only its kinetic energy but also its gravitational potential energy, indicating a potentially high energy recovery power. If the electric vehicle has a significant amount of remaining battery power on the current road segment and the next road segment is predicted to be downhill, the energy consumption power of the electric vehicle can be increased by increasing the number of electrical devices that need to be activated and / or the power of already activated devices. This ensures that the energy consumption power and energy recovery power are balanced when the electric vehicle enters the downhill section, preventing the braking capacity of the drive system from being limited due to a large amount of remaining battery power, thus guaranteeing driving safety.

[0013] In one embodiment of the first aspect, the control method specifically includes: when the electric vehicle is traveling along the current driving segment, if the remaining power of the electric vehicle in the current driving segment is greater than a preset power and the road condition information of the next driving segment is detected as a red light, increasing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have already been turned on.

[0014] In this embodiment, when an electric vehicle enters a red light situation, it needs to decelerate to zero, meaning the predicted energy recovery power is high. When the electric vehicle has a significant amount of remaining battery power in the current road segment and the next road segment is predicted to be a red light, the energy consumption power of the electric vehicle is increased by increasing the number of electrical devices that need to be activated and / or the power of already activated devices. This ensures that the energy consumption power and energy recovery power are balanced when the electric vehicle enters a red light situation, preventing the braking capacity of the drive system from being limited due to a large amount of remaining battery power, thus ensuring driving safety.

[0015] In one embodiment of the first aspect, the control method specifically includes: when the electric vehicle is traveling along the current driving segment, if the remaining power of the electric vehicle in the current driving segment is greater than a preset power and the road condition information of the next driving segment is detected as indicating that the destination has been reached, increasing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have already been turned on.

[0016] In this embodiment, when the electric vehicle is about to reach its destination, it needs to decelerate to zero, meaning the predicted energy recovery power is high. When the electric vehicle has a significant amount of remaining battery power on the current road segment and the road conditions for the next segment indicate it is not yet at its destination, the energy consumption power of the electric vehicle is increased by increasing the number of electrical devices that need to be activated and / or the power of already activated devices. This ensures that the energy consumption power and energy recovery power are balanced before the electric vehicle reaches its destination, preventing the braking capacity of the drive system from being limited due to a large amount of remaining battery power, thus guaranteeing driving safety.

[0017] In one embodiment of the first aspect, the control method specifically includes: during the process of an electric vehicle traveling along the current driving segment, when the remaining power of the electric vehicle in the current driving segment is greater than a preset power and the road condition information of the next driving segment is detected as indicating that the destination has been reached, reducing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have been turned on so that the difference between the remaining power of the electric vehicle after reaching the destination and the power threshold is less than a preset power difference.

[0018] In this embodiment, as the electric vehicle approaches its destination, it needs to decelerate to zero, indicating a high predicted energy recovery power. Since the vehicle is nearing its destination, the battery is allowed to charge more power. In this situation, by reducing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of already turned-on devices, energy consumption is reduced, thus allowing the battery to charge more power.

[0019] In one embodiment of the first aspect, the control method specifically includes: during the process of the electric vehicle traveling along the current travel segment, when the remaining battery power of the electric vehicle in the current travel segment is greater than a preset battery power and the traffic flow speed of the next travel segment is detected to be increasing, reducing the number of electrical devices that need to be turned on and / or the power of the electrical devices that have already been turned on in the electric vehicle; during the process of the electric vehicle traveling along the current travel segment, when the remaining battery power of the electric vehicle in the current travel segment is greater than a preset battery power and the traffic flow speed of the next travel segment is detected to be decreasing, increasing the number of electrical devices that need to be turned on and / or the power of the electrical devices that have already been turned on in the electric vehicle.

[0020] In this embodiment, after the electric vehicle enters a road segment with increased traffic flow speed, the smoothness of its driving increases, eliminating the need for frequent acceleration and deceleration, and the predicted energy recovery power is low. When the electric vehicle has a significant amount of remaining battery power in the current road segment and the traffic flow speed is detected as increasing for the next segment, the energy consumption power is reduced by decreasing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of already turned-on electrical devices. This prevents excessive power consumption when the electric vehicle enters a road segment with increased traffic flow speed.

[0021] Furthermore, when electric vehicles enter road sections with reduced traffic flow, their driving smoothness decreases, requiring frequent acceleration and deceleration, and resulting in a high predicted energy recovery power. If the electric vehicle has a significant amount of remaining battery power in the current road segment and the detected traffic flow information for the next segment indicates reduced speed, the energy consumption power of the electric vehicle can be increased by increasing the number of electrical devices that need to be activated and / or the power of already activated devices. This ensures that the energy consumption power and energy recovery power are balanced when the electric vehicle enters a road segment with reduced traffic flow, preventing the braking capacity of the drive system from being limited due to a large amount of remaining battery power, thus ensuring driving safety.

[0022] In one embodiment of the first aspect, the control method specifically includes: during the process of the electric vehicle traveling along the current travel segment, the greater the remaining power of the electric vehicle in the current travel segment, the fewer the number of electrical devices that need to be turned on in the electric vehicle and / or the lower the power of the electrical devices that have been turned on.

[0023] In this embodiment, the greater the remaining battery power of the electric vehicle on the current driving segment, the more recovered electrical energy can be charged into the power battery. In this case, by controlling the number of electrical devices that need to be turned on in the electric vehicle to be as small as possible and / or the power of the already turned-on electrical devices to be as low as possible, the energy consumption power is reduced, thereby enabling more recovered electrical energy to be charged into the power battery and improving the energy recovery efficiency of the electric vehicle.

[0024] In one embodiment of the first aspect, the control method specifically includes: when the electric vehicle is traveling along the current road segment, if the slope of the downhill road condition is detected to be greater, the reduced traffic flow speed is smaller, or the congestion is more severe, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the already turned-on electrical devices is increased.

[0025] In this embodiment, when the slope of the downhill road is detected to be greater, the reduced traffic flow speed is lower, or the congestion is more severe, i.e., the predicted energy recovery power is greater, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the already turned-on electrical devices are increased, i.e., the increase in energy consumption power is greater. This allows for flexible control of the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the already turned-on electrical devices based on the slope of the downhill road, the reduced traffic flow speed, or the congestion level of the next travel segment. This ensures that the energy consumption power and energy recovery power can be balanced under different road conditions, avoiding the situation where the braking capacity of the drive system is limited due to the large amount of remaining electric power in the electric vehicle.

[0026] In one embodiment of the first aspect, the control method specifically includes: when the electric vehicle is traveling along the current road segment, if the slope of the uphill road condition is detected to be greater or the traffic flow speed is greater after the increase, the number of electrical devices that need to be turned on in the electric vehicle should be reduced and / or the power of the electrical devices that have been turned on should be reduced.

[0027] In this embodiment, when the slope of the uphill road condition is detected to be greater or the traffic flow speed is increased, the predicted energy recovery power is smaller. The number of electrical devices that need to be turned on in the electric vehicle and / or the power of the already turned-on electrical devices are controlled to be smaller, that is, the reduction in energy consumption power is greater. This realizes the ability to flexibly control the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the already turned-on electrical devices based on the slope of the uphill road condition or the increased traffic flow speed of the next driving segment. This enables the reduction of energy consumption power under different road conditions and avoids excessive power consumption.

[0028] In one embodiment of the first aspect, the control method further includes: during the travel of the electric vehicle along the target driving path, when it is predicted that the temperature of the drive motor of the drive system will be greater than a temperature threshold after a preset time, actively controlling the drive system to reduce the output reverse torque before the opening of the brake pedal begins to decrease.

[0029] In this embodiment, if the temperature of the drive motor exceeds a temperature threshold, it indicates that the drive motor is overheating. If the drive system continues to output a certain amount of reverse torque, it will damage the drive motor, resulting in insufficient braking capacity and affecting driving safety. After predicting that the drive motor will overheat after a preset time, before the brake pedal opening begins to decrease (i.e., before the driver actively reduces the brake pedal opening), the drive system is actively controlled to reduce the output reverse torque. This lowers the drive motor temperature before the electric vehicle enters the next driving segment, preventing overheating and ensuring driving safety.

[0030] In one embodiment of the first aspect, the control method specifically includes: during the travel of the electric vehicle along the target travel path, when it is predicted that the deceleration required to reduce the speed of the electric vehicle to zero after a preset distance is greater than the preset deceleration, actively controlling the braking system of the electric vehicle to output braking force during the process of controlling the drive system to output reverse torque.

[0031] In this embodiment, when the required deceleration of the electric vehicle is greater than the preset deceleration, it indicates that braking by the drive system alone cannot decelerate and stop the electric vehicle within the preset distance. In this case, while controlling the output of reverse torque by the drive system, the braking system of the electric vehicle is actively controlled to output braking force. The braking system provides a portion of the braking force, and the braking system and drive system work together to brake, thereby allowing the electric vehicle to decelerate and stop within the preset distance.

[0032] In one embodiment of the first aspect, the control method specifically includes: during the travel of the electric vehicle along the target travel path, displaying on the central control screen of the electric vehicle at least one of the following: changes in road condition information of the target travel path, changes in the number of activated electrical devices, and changes in the power of activated electrical devices, wherein the changes in the number of activated electrical devices and the changes in the power of activated electrical devices change with the changes in road condition information of the target travel path.

[0033] In this embodiment, during the electric vehicle's journey along the target driving path, at least one of the following is displayed on the electric vehicle's central control screen: changes in road conditions along the target driving path, changes in the number of activated electrical devices, and changes in the power of activated electrical devices. The changes in the number of activated electrical devices and the power of activated electrical devices change with the changes in road conditions along the target driving path. These changes are visualized, allowing the user to understand the vehicle's status in advance, avoiding anxiety caused by sudden changes in the control process (such as sudden high-speed fan noise), building trust, and improving the user experience.

[0034] In one embodiment of the first aspect, the control method further includes: when it is predicted that the deceleration required to reduce the speed of the electric vehicle to zero after a preset distance is greater than a preset deceleration, displaying a prompt message on the central control screen of the electric vehicle, the prompt message being used to indicate that the braking capacity of the drive system is insufficient.

[0035] In this embodiment, if braking by the drive system alone is insufficient to slow down and stop the electric vehicle within a preset distance, a prompt message is displayed on the central control screen to alert the driver that the current braking system's braking capacity is insufficient and that early braking is necessary to ensure driving safety.

[0036] Secondly, embodiments of this application provide a controller, which is used to: acquire the current location information and destination information of an electric vehicle; acquire the predicted energy recovery power and predicted energy consumption power of the electric vehicle based on the road condition information corresponding to the target driving path from the current location information to the destination information; during the driving of the electric vehicle along the target driving path, control the reverse torque output by the drive system to change with the opening of the brake pedal of the electric vehicle; and during the reverse torque output by the drive system, adjust the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices in the electric vehicle based on the remaining battery power, predicted energy recovery power and predicted energy consumption power of the electric vehicle.

[0037] Thirdly, embodiments of this application provide an electric vehicle, which includes a controller, a drive system, and electrical equipment, wherein: The controller is used to: acquire the current location information and destination information of the electric vehicle, and acquire the predicted energy recovery power and predicted energy consumption power of the electric vehicle based on the road condition information corresponding to the target driving path from the current location information to the destination information. During the electric vehicle's journey along the target path, the reverse torque output by the drive system is adjusted based on the opening of the electric vehicle's brake pedal, and the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices are adjusted based on the remaining battery power, predicted energy recovery power, and predicted energy consumption power of the electric vehicle at its current location.

[0038] The supplementary solutions and technical effects provided in the second and third aspects above can be found in the corresponding descriptions in the first aspect, and will not be repeated here. Attached Figure Description

[0039] Figure 1 A schematic diagram of an electric vehicle provided in an embodiment of this application is shown; Figure 2 A schematic diagram of a driving system provided in an embodiment of this application is shown; Figure 3 A flowchart of a control method for an electric vehicle provided in an embodiment of this application is shown; Figure 4 A schematic diagram of a traffic congestion situation provided in an embodiment of this application is shown; Figure 5 A timing diagram showing an energy recovery power, predicted energy consumption power, and remaining power capacity provided in an embodiment of this application is illustrated. Figure 6 A schematic diagram of an uphill road condition provided in an embodiment of this application is shown; Figure 7 The illustration shows a time-series diagram of the slope, predicted energy recovery power, energy consumption power, and remaining power of an uphill road condition according to an embodiment of this application. Figure 8 The illustration shows a time-series diagram of the slope, predicted energy recovery power, energy consumption power, and remaining power of a downhill road condition according to an embodiment of this application. Figure 9 A schematic diagram of a red light traffic situation provided in an embodiment of this application is shown; Figure 10 A timing diagram showing another prediction of energy recovery power, energy consumption power, and remaining power provided in an embodiment of this application is shown; Figure 11 A time-series diagram of traffic flow speed, predicted energy recovery power, energy consumption power, and remaining power is shown in an embodiment of this application. Figure 12 A time-series diagram of traffic flow speed, predicted energy recovery power, energy consumption power, and remaining power is shown in an embodiment of this application. Figure 13 This paper presents a timing diagram showing the brake pedal opening, predicted drive motor temperature, reverse torque output by the drive system, and actual drive motor temperature according to an embodiment of this application. Figure 14 A flowchart of another control method for an electric vehicle provided in an embodiment of this application is shown; Figure 15A schematic diagram of a central control screen page provided in an embodiment of this application is shown; Figure 16 A schematic diagram of a controller provided in an embodiment of this application is shown. Detailed Implementation

[0040] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0041] The use of prefixes such as "first" and "second" in this application embodiment is solely for distinguishing different descriptive objects and does not limit the position, order, priority, quantity, or content of the described objects. The use of ordinal numbers and other prefixes to distinguish descriptive objects in this application embodiment does not constitute a limitation on the described objects. The description of the described objects is found in the claims or the context of the embodiments, and the use of such prefixes should not constitute unnecessary restrictions.

[0042] Electric vehicles with energy recovery functions can recover energy by activating the energy recovery function during braking, allowing the drive system to output reverse torque. However, the power battery can only store a limited amount of electricity. When the remaining power battery has a large amount of charge, it will limit the input of recovered electrical energy, thereby limiting the braking ability of the electric vehicle and affecting driving safety.

[0043] In view of this, embodiments of this application provide a control method, controller, and electric vehicle for an electric vehicle. By acquiring the current location information and destination information of the electric vehicle, a target driving path from the current location information to the destination information can be obtained. After acquiring the target driving path of the electric vehicle, based on the road condition information (such as congestion, gradient) of the target driving path, the predicted energy consumption power and predicted energy recovery power of the electric vehicle traveling along the target driving path can be predicted. Subsequently, during the electric vehicle's travel along the target driving path, the reverse torque output by the control drive system changes with the opening of the electric vehicle's brake pedal, braking the electric vehicle according to the driver's intention to operate the brake pedal, ensuring a good driving experience. Furthermore, during the reverse torque output by the drive system, the number of electrical devices that need to be turned on and / or the power of already turned-on electrical devices in the electric vehicle are adjusted according to the remaining battery power, predicted energy recovery power, and predicted energy consumption power. That is, the actual electrical energy consumed by the electrical devices is adjusted in advance based on the predicted energy recovery power and energy consumption power, thereby ensuring the braking capability of the electric vehicle and improving its energy recovery efficiency.

[0044] See Figure 1 , Figure 1 A schematic diagram of an electric vehicle provided in an embodiment of this application is shown. (As shown) Figure 1As shown, the electric vehicle 100 includes a drive system 110, electrical equipment 120, a power battery 130, and a controller 140. The drive system 110 provides driving and braking force to the electric vehicle 100. The electrical equipment 120 includes all devices other than the drive system 110 that require power from the power battery 130, such as headlights, turn signals, horns, dashboards, windshield wipers, air conditioning, positive temperature coefficient heaters (PTC heaters), blowers, massage seats, and audio-visual systems. The controller 140 controls the drive system 110 and the electrical equipment 120. The power battery provides electrical energy to the drive system 110, the electrical equipment 120, and the controller 140.

[0045] The electric vehicle 100 in this application embodiment can be any of different types of automobiles such as cars, trucks, and passenger buses, or it can be a transportation device for carrying people or goods such as tricycles, two-wheeled vehicles, and trains, or other types of vehicles driven by a drive system. This application embodiment does not limit this.

[0046] See Figure 2 , Figure 2 A schematic diagram of a driving system provided in an embodiment of this application is shown.

[0047] Figure 2 The electric vehicle 100 shown in (a) is a two-wheel drive model. The drive system 110 includes two front wheel drive motors 111 and a motor controller 121 for the drive motors 111, and two rear wheel drive motors 112 and a motor controller 122 for the drive motors 112.

[0048] When the electric vehicle 100 is in a driving state, each drive motor in the drive system 110 provides driving force to the electric vehicle 100. Specifically, when the electric vehicle 100 is in a driving state, the vehicle controller 140 calculates the torque demand of the electric vehicle and outputs drive commands to the motor controllers of each drive motor. Each motor controller receives power from the power battery 130 (e.g., Figure 1 The electrical energy (as shown) is used to control the corresponding drive motor to output the torque indicated by the drive command.

[0049] When the electric vehicle 100 is in a driving state, during the forward movement of the electric vehicle 100, each drive motor supplies driving torque to the wheels of the electric vehicle 100 to provide driving force. The driving torque is in the same direction as the wheel rotation when the electric vehicle is moving forward. During the reverse movement of the electric vehicle 100, each drive motor supplies braking torque to the wheels of the electric vehicle 100 to provide driving force. The braking torque is in the same direction as the wheel rotation when the electric vehicle is moving backward.

[0050] In particular, each drive motor in the electric vehicle 100 with energy recovery function can also be used to provide braking force for the electric vehicle 100. Specifically, when the electric vehicle 100 is in a braking state, the controller 140 receives a braking signal and sends an energy recovery command to each motor controller. Each motor controller responds to the energy recovery command and controls the corresponding drive motor to operate in a power generation state. Each drive motor converts the kinetic energy of the electric vehicle's wheels into electrical energy and outputs braking torque to the wheels of the electric vehicle 100 to provide braking force for the electric vehicle 100.

[0051] See Figure 2 The electric vehicle 100 shown in (b) is a four-wheel drive model. The drive system 110 includes a drive motor 113 for the left front wheel and a motor controller 123 for the drive motor 113, a drive motor 114 for the right front wheel and a motor controller 124 for the drive motor 114, a drive motor 115 for the left rear wheel and a motor controller 125 for the drive motor 115, and a drive motor 116 for the right rear wheel and a motor controller 126 for the drive motor 116.

[0052] in, Figure 2 The drive system 110 shown is merely exemplary. The electric vehicle 100 can also be a single-drive model, a three-drive model with one front and two rear wheels (two front wheels are driven by one drive motor, and two rear wheels are driven by two drive motors respectively), or a three-drive model with two front and one rear wheels.

[0053] The architecture of the embodiments of this application has been described above. The control method for electric vehicles provided by this application will be described below with reference to specific embodiments.

[0054] The electric vehicle control method provided in this application is used to adjust the energy consumption power of the electric vehicle during the braking process of the electric vehicle through the drive system in order to improve the energy recovery efficiency of the electric vehicle.

[0055] Energy consumption power refers to the power used to convert electrical energy into other forms of energy (such as light, heat, mechanical energy, etc.).

[0056] See Figure 3 , Figure 3 A flowchart illustrating a control method for an electric vehicle provided in an embodiment of this application is shown. Figure 3 As shown, the control method includes: acquiring the current location information and destination information of the electric vehicle, and acquiring the predicted energy recovery power and predicted energy consumption power of the electric vehicle based on the road condition information corresponding to the target driving path from the current location information to the destination information.

[0057] The current location information of an electric vehicle refers to its coordinates in space at a specific moment, which may include latitude and longitude, altitude, timestamp, heading, and the location of nearby streetlights. Current location information can be obtained through at least one device, such as the Global Positioning System (GPS), the BeiDou Navigation Satellite System, or an inertial measurement unit (IMU).

[0058] Destination information refers to the location that the user or system has preset and that the vehicle will eventually need to arrive at. It can be latitude and longitude, address (such as country, city, street, house number), point of interest (specifying the destination by name, such as "xx city train station"), etc.

[0059] In one embodiment, the target driving route can be a historical driving route from the current location information to the destination information, or a driving route determined according to demand, such as the fastest driving route, the shortest driving route, or a toll-free driving route from the current location information to the destination information, or a driving route planned by the intelligent driving system based on the current location information and the destination information.

[0060] Among them, road condition information refers to parameters related to road networks and traffic flow, including congested road conditions, road construction conditions, uphill road conditions, downhill road conditions, traffic light conditions, and urban road conditions.

[0061] The predicted energy recovery power of an electric vehicle refers to the pre-estimated power by which the drive system can convert the kinetic energy of the electric vehicle into electrical energy. The predicted energy dissipation power refers to the pre-estimated power by which the electric vehicle converts electrical energy into other forms of energy during operation.

[0062] Different road conditions correspond to different predicted energy consumption power or predicted energy recovery power. For example, when starting up in a low-temperature environment or during fast DC charging, the drive system needs to be heated, resulting in higher energy consumption power. Conversely, when an electric vehicle is driving downhill or in traffic jams, the energy recovery power is higher.

[0063] After obtaining the target driving path, the predicted energy recovery power and predicted energy consumption power of the electric vehicle when driving along the target driving path can be predicted in advance based on the road condition information of the target driving path.

[0064] Then, continue to see Figure 3The control method also includes: during the electric vehicle's travel along the target driving path, controlling the reverse torque output by the drive system to change with the opening of the electric vehicle's brake pedal, and adjusting the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices in the electric vehicle based on the remaining battery power, predicted energy recovery power, and predicted energy consumption power of the electric vehicle during the reverse torque output by the drive system.

[0065] During the electric vehicle's journey along the target path, the reverse torque output by the drive system is controlled to vary with the opening of the electric vehicle's brake pedal, thereby enabling the electric vehicle to be braked according to the driver's intention in operating the brake pedal.

[0066] During the process of outputting reverse torque through the drive system, the greater the value of the reverse torque output by the drive system, the greater the energy recovery power. The more electrical devices that need to be turned on in an electric vehicle and / or the greater the power of the already turned-on electrical devices, the greater the energy consumption power. Then, the energy recovery power and energy consumption power are compared. When the energy recovery power is greater than the energy consumption power, it means that while the recovered electrical energy supports the vehicle's functions, there is still surplus recovered electrical energy available to charge the power battery.

[0067] If the electric vehicle has a large amount of remaining charge, the recovered energy will be difficult to recharge the power battery, which will reduce the energy recovery power, i.e., reduce the reverse torque output of the drive system. This will result in insufficient braking ability of the electric vehicle and poor energy recovery efficiency, thus leading to a greater driving safety risk for the electric vehicle.

[0068] In this situation, by increasing the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices in the electric vehicle based on the predicted energy recovery power and predicted energy consumption power, such as turning on the air conditioning for cooling / heating, increasing the power of the air conditioning for cooling / heating, turning on the seat ventilation, turning on the seat massage, turning on the lights, etc., the predicted energy consumption power is increased, so as to avoid the situation where the braking capacity of the drive system is limited due to the large amount of remaining electric power in the electric vehicle, thus ensuring driving safety.

[0069] In another scenario, if the electric vehicle has a low remaining charge, more recovered energy is needed to charge the power battery. However, the brake pedal opening is not increased, meaning the energy recovery power remains unchanged, and the actual amount of recovered energy charged into the power battery is limited.

[0070] In this case, by reducing the number of electrical devices that need to be turned on and / or the power of already turned-on electrical devices in the electric vehicle based on the predicted energy recovery power and predicted energy consumption power, such as turning off the air conditioning cooling / heating, reducing the power of the air conditioning cooling / heating, turning off seat massage, etc., the predicted energy consumption power is reduced, and more recovered electrical energy is charged into the power battery, thereby improving the energy recovery efficiency of the electric vehicle.

[0071] In one embodiment, the remaining battery power of an electric vehicle can be determined to be large by comparing the remaining battery power to a preset battery power, and the remaining battery power of an electric vehicle can be determined to be small by comparing the remaining battery power to a preset battery power.

[0072] The target driving route may include multiple driving segments, the remaining battery power of the electric vehicle may include the remaining battery power of the electric vehicle when driving on multiple driving segments, the predicted energy recovery power may include the predicted energy recovery power of multiple driving segments, and the predicted energy consumption power may include the predicted energy consumption power of multiple driving segments. In one embodiment, the length of each driving segment can be selected according to needs, such as 2 meters, 5 meters, 10 meters, 20 meters, etc.

[0073] During the process of an electric vehicle traveling along a target route, when the electric vehicle is traveling on the current road segment, the number of electrical devices that need to be turned on and / or the power of the electrical devices that have already been turned on can be adjusted in advance according to the predicted energy recovery power and predicted energy consumption power of the next road segment and the remaining power in the current road segment, so as to ensure the braking ability and energy recovery efficiency of the electric vehicle in each road segment.

[0074] In this embodiment, by acquiring the current location information and destination information of the electric vehicle, the target driving path of the electric vehicle from the current location information to the destination information can be obtained. After acquiring the target driving path of the electric vehicle, based on the road condition information of the target driving path (such as congestion, gradient), the predicted energy consumption power and predicted energy recovery power of the electric vehicle traveling along the target driving path can be predicted. Then, during the electric vehicle's travel along the target driving path, the reverse torque output by the control drive system changes with the opening of the electric vehicle's brake pedal, braking the electric vehicle according to the driver's intention to operate the brake pedal, ensuring the driving experience. In addition, during the reverse torque output by the drive system, the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices in the electric vehicle are adjusted according to the remaining battery power of the electric vehicle, the predicted energy recovery power, and the predicted energy consumption power. That is, the actual electrical energy consumed by the electrical devices is adjusted in advance according to the predicted energy recovery power and energy consumption power, thereby ensuring the braking ability of the electric vehicle and improving the energy recovery efficiency of the electric vehicle.

[0075] Specifically, when an electric vehicle has a large remaining charge, and the recovered energy cannot fully charge the battery, the energy consumption power is increased by increasing the number of devices that need to be turned on and / or the power of already turned-on devices based on the predicted energy recovery power and predicted energy consumption power. This increases the energy consumption power and prevents the braking capacity of the drive system from being limited due to the large remaining charge, thus ensuring driving safety. Conversely, when an electric vehicle has a small remaining charge and requires more recovered energy to charge the battery, the energy consumption power is reduced by decreasing the number of devices that need to be turned on and / or the power of already turned-on devices based on the predicted energy recovery power and predicted energy consumption power. This allows more recovered energy to be charged into the battery, improving the energy recovery efficiency of the electric vehicle.

[0076] In one embodiment, the control method may further include: obtaining the predicted remaining power of the electric vehicle based on the remaining power of the electric vehicle, the predicted energy recovery power, and the predicted energy consumption power; and adjusting the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices in the electric vehicle based on the predicted remaining power.

[0077] The control objective is to predict that the remaining battery power is greater than a preset battery power but less than a battery power threshold. This objective controls the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the already turned-on electrical devices, thereby ensuring the braking capability of the electric vehicle and improving its energy recovery efficiency. The battery power threshold is the maximum allowable battery power.

[0078] The following will describe in detail how, during the electric vehicle's journey along the target driving path, the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices are adjusted based on road condition information.

[0079] The target driving path is divided into multiple driving segments. The road condition information, predicted energy recovery power, and predicted energy consumption power of the multiple driving segments can be the same or different. The following will take the example of an electric vehicle traveling from the current driving segment to the next driving segment to describe in detail the control method provided in the embodiments of this application.

[0080] In one embodiment, the control method specifically includes: when the electric vehicle is traveling along the current driving segment, if the remaining power of the electric vehicle in the current driving segment is greater than a preset power and the road condition information of the next driving segment is detected to be congested, increasing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have already been turned on.

[0081] See Figure 4 , Figure 4 This illustration shows a schematic diagram of a congested road condition according to an embodiment of this application. When the road condition information for the next travel segment is detected to be congested, such as... Figure 4As shown, the electric vehicle needs to start and stop frequently in the next driving segment, and the electric vehicle needs to accelerate and decelerate frequently. Each time it decelerates, the drive system will output reverse torque to recover energy, that is, the predicted energy recovery power is large.

[0082] If an electric vehicle has more remaining battery power than its preset limit while it is currently traveling, the remaining recovered energy may not be able to recharge the battery. In this situation, by increasing the number of electrical devices that need to be turned on and / or the power of the already turned-on devices, the energy consumption power of the electric vehicle can be increased before it enters the next travel segment, thus ensuring the vehicle's braking capability.

[0083] For ease of understanding, see Figure 5 , Figure 5 This illustration shows a timing diagram of predicted energy recovery power, energy consumption power, and remaining battery power according to an embodiment of this application. After time t when the electric vehicle enters the next travel segment, the predicted energy recovery power increases; before time t, the energy consumption power increases. Throughout this process, the remaining battery power of the electric vehicle is always greater than a preset battery power level but less than a battery power threshold.

[0084] In one embodiment, the more severe the congestion is detected, the greater the predicted energy recovery power, and the more electrical devices that need to be turned on in the electric vehicle and / or the greater the power of the already turned-on electrical devices. This allows for flexible control of the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices based on the congestion level of the next travel segment. This ensures that energy consumption power and energy recovery power can be balanced under different congestion levels, avoiding situations where the braking capacity of the drive system is limited due to excessive remaining battery power in the electric vehicle.

[0085] In this embodiment, when an electric vehicle enters congested traffic, it needs to accelerate and decelerate frequently, and the drive system recovers energy with each deceleration. If the electric vehicle has a significant amount of remaining battery power in the current road segment and the next road segment is detected to be congested, the energy consumption power is increased by increasing the number of electrical devices that need to be turned on and / or the power of already turned-on devices. This balances the energy consumption power and energy recovery power after the electric vehicle enters congested traffic, preventing the braking capacity of the drive system from being limited due to a large amount of remaining battery power, thus ensuring driving safety.

[0086] In one embodiment, the control method specifically includes: when the electric vehicle is traveling on the current road segment, if the remaining battery power of the electric vehicle on the current road segment is greater than a preset battery power and the road condition information of the next road segment is detected as uphill, reducing the number of electrical devices that need to be turned on and / or the power of the electrical devices that are already turned on; when the electric vehicle is traveling along the current road segment, if the remaining battery power of the electric vehicle on the current road segment is greater than a preset battery power and the road condition information of the next road segment is detected as downhill, increasing the number of electrical devices that need to be turned on and / or the power of the electrical devices that are already turned on.

[0087] See Figure 6 , Figure 6 This diagram illustrates an uphill road condition according to an embodiment of this application. When the road condition information for the next travel segment is detected to be uphill, such as... Figure 6 As shown, electric vehicles need to continuously output power to overcome gravity and climb hills when driving on the next road segment. The predicted energy recovery power is small or zero, while the predicted energy consumption power is large.

[0088] In this case, by reducing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that are already turned on, the energy consumption power can be reduced, thus avoiding excessive power consumption.

[0089] In one embodiment, when the slope of the uphill road condition is detected to be greater, i.e. the predicted energy recovery power is smaller, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have already been turned on is controlled to be smaller, i.e. the reduction in energy consumption power is greater. This realizes the ability to flexibly control the number of electrical devices that need to be turned on and / or the power of the electrical devices that have already been turned on in the electric vehicle according to the slope of the uphill road condition of the next driving segment, so as to reduce energy consumption power under different uphill road conditions and avoid excessive power consumption.

[0090] For ease of understanding, see Figure 7 , Figure 7 The illustration shows a time-series diagram of the slope, predicted energy recovery power, energy consumption power, and remaining power of an uphill road condition according to an embodiment of this application.

[0091] like Figure 7 As shown, it is predicted that the energy recovery power will decrease after time t when the electric vehicle enters the next driving segment, and the energy consumption power will decrease before time t. After time t, the steeper the uphill slope, the lower the energy recovery power; before time t, the lower the energy consumption power. Throughout this process, the remaining battery power of the electric vehicle is always less than the battery threshold.

[0092] When the road condition information for the next travel segment is detected to be downhill, it means that the electric vehicle can recover not only the kinetic energy of the electric vehicle, but also the gravitational potential energy, indicating that the predicted energy recovery power is relatively large.

[0093] In this situation, by increasing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the already turned-on electrical devices, the energy consumption power of the electric vehicle is increased before the electric vehicle enters the next driving segment. This avoids the situation where the braking capacity of the drive system is limited due to the large amount of remaining power in the electric vehicle, and ensures the braking capacity of the electric vehicle.

[0094] In one embodiment, when the slope of the downhill road condition is detected to be greater, i.e. the predicted energy recovery power is greater, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have already been turned on are controlled to be greater, i.e. the increase in energy consumption power is greater. This realizes the ability to flexibly control the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have already been turned on according to the slope of the downhill road condition of the next driving segment. This achieves a balance between energy consumption power and energy recovery power under different downhill slope conditions, avoiding the situation where the braking capacity of the drive system is limited due to the large amount of remaining power in the electric vehicle.

[0095] For ease of understanding, see Figure 8 , Figure 8 The illustration shows a time-series diagram of the slope, predicted energy recovery power, energy consumption power, and remaining power of a downhill road condition according to an embodiment of this application.

[0096] like Figure 8 As shown, it is predicted that after time t when the electric vehicle enters the next driving segment, the predicted energy recovery power will increase; before time t, the predicted energy consumption power will increase. After time t, the steeper the downhill slope, the greater the energy recovery power; before time t, the greater the energy consumption power. Throughout this process, the remaining battery power of the electric vehicle is always greater than the preset battery power and less than the battery power threshold.

[0097] In this embodiment, after the electric vehicle enters an uphill section, it needs to continuously output power to overcome gravity and climb the hill. The predicted energy recovery power is low or zero, while the predicted energy consumption power is high. If the electric vehicle has a significant amount of remaining battery power in the current road segment and the road condition information for the next segment is detected as uphill, the energy consumption power is reduced by decreasing the number of electrical devices that need to be turned on and / or the power of already turned-on electrical devices. This prevents excessive power consumption after the electric vehicle enters the uphill section.

[0098] Furthermore, when an electric vehicle enters a downhill section of road, it can recover not only its kinetic energy but also its gravitational potential energy, indicating a potentially high energy recovery power. If the electric vehicle has a significant amount of remaining battery power on the current road segment and the next road segment is predicted to be downhill, the energy consumption power of the electric vehicle can be increased by increasing the number of electrical devices that need to be activated and / or the power of already activated devices. This ensures that the energy consumption power and energy recovery power are balanced when the electric vehicle enters the downhill section, preventing the braking capacity of the drive system from being limited due to a large amount of remaining battery power, thus guaranteeing driving safety.

[0099] In one embodiment, the control method specifically includes: when the electric vehicle is traveling along the current driving segment, if the remaining power of the electric vehicle in the current driving segment is greater than a preset power and the road condition information of the next driving segment is detected as a red light, increasing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have already been turned on.

[0100] See Figure 9 , Figure 9 This illustration shows a schematic diagram of a red light traffic situation according to an embodiment of this application. When the traffic information for the next travel segment is detected to be a red light, such as... Figure 9 As shown, the electric vehicle needs to decelerate to zero in the next segment of the journey, indicating a high predicted energy recovery power.

[0101] In this case, by increasing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the already turned-on electrical devices, before the electric vehicle enters the next driving segment, see details below. Figure 5 This increases the energy consumption power of electric vehicles and ensures their braking ability.

[0102] In this embodiment, when an electric vehicle enters a red light situation, it needs to decelerate to zero, meaning the predicted energy recovery power is high. When the electric vehicle has a significant amount of remaining battery power in the current road segment and the next road segment is predicted to be a red light, the energy consumption power of the electric vehicle is increased by increasing the number of electrical devices that need to be activated and / or the power of already activated devices. This ensures that the energy consumption power and energy recovery power are balanced when the electric vehicle enters a red light situation, preventing the braking capacity of the drive system from being limited due to a large amount of remaining battery power, thus ensuring driving safety.

[0103] In one embodiment, when the number of red lights in the next travel segment is detected to be greater than the number of red lights in the current travel segment, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that are already turned on are increased.

[0104] The more red lights there are, the greater the increase in the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the already turned-on electrical devices.

[0105] Similarly, when the traffic information for the next travel segment is detected to be green light, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that are already turned on are reduced.

[0106] In one embodiment, the control method specifically includes: when the electric vehicle is traveling along the current driving segment, if the remaining power of the electric vehicle in the current driving segment is greater than a preset power and the road condition information of the next driving segment is detected as indicating that the destination has been reached, increasing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have already been turned on.

[0107] When the road conditions for the next travel segment are detected to be conducive to reaching the destination, meaning the electric vehicle needs to decelerate to zero and turn off the engine (or enter parking mode) for the next travel segment, it is predicted that the energy recovery power is high.

[0108] In this case, by increasing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the already turned-on electrical devices, before the electric vehicle enters the next driving segment, see details below. Figure 5 This increases the energy consumption power of electric vehicles and ensures their braking ability.

[0109] In this embodiment, when the electric vehicle is about to reach its destination, it needs to decelerate to zero, meaning the predicted energy recovery power is high. When the electric vehicle has a significant amount of remaining battery power on the current road segment and the road conditions for the next segment indicate it is not yet at its destination, the energy consumption power of the electric vehicle is increased by increasing the number of electrical devices that need to be activated and / or the power of already activated devices. This ensures that the energy consumption power and energy recovery power are balanced before the electric vehicle reaches its destination, preventing the braking capacity of the drive system from being limited due to a large amount of remaining battery power, thus guaranteeing driving safety.

[0110] In one embodiment, the control method specifically includes: during the process of an electric vehicle traveling along the current driving segment, when the remaining power of the electric vehicle in the current driving segment is greater than a preset power and the road condition information of the next driving segment is detected as indicating that the destination has been reached, reducing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have been turned on so that the difference between the remaining power of the electric vehicle after reaching the destination and the power threshold is less than a preset power difference.

[0111] When the road conditions for the next travel segment are detected to be conducive to reaching the destination, meaning the electric vehicle needs to decelerate to zero and turn off the engine (or enter parking mode) for the next travel segment, it is predicted that the energy recovery power is high.

[0112] In this situation, since the electric vehicle is about to reach its destination, by reducing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that are already turned on, the energy consumption power of the electric vehicle is reduced, allowing more power to be charged into the power battery.

[0113] If the difference between the remaining battery power of an electric vehicle and the battery power threshold is less than the preset battery power difference, it means that the remaining battery power of the electric vehicle is close to or slightly greater than the battery power threshold.

[0114] For ease of understanding, see Figure 10 , Figure 10 This illustration shows another timing diagram of predicted energy recovery power, energy consumption power, and remaining battery power provided by an embodiment of this application. It predicts that after time t when the electric vehicle enters the next travel segment, the predicted energy recovery power will increase; before time t, the predicted energy consumption power will decrease. After the electric vehicle reaches its destination, the remaining battery power of the electric vehicle can be greater than a battery power threshold.

[0115] In this embodiment, as the electric vehicle approaches its destination, it needs to decelerate to zero, indicating a high predicted energy recovery power. Since the vehicle is nearing its destination, the battery is allowed to charge more power. In this situation, by reducing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of already turned-on devices, energy consumption is reduced, thus allowing the battery to charge more power.

[0116] In another embodiment, when the electric vehicle is traveling along the current driving segment, if the remaining power of the electric vehicle in the current driving segment is greater than the preset power and the road condition information of the next driving segment is detected as indicating that the destination has been reached, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the already turned-on electrical devices can be kept unchanged so that the difference between the remaining power of the electric vehicle after reaching the destination and the power threshold is less than the preset power difference.

[0117] In one embodiment, the control method specifically includes: during the process of the electric vehicle traveling along the current driving segment, when the remaining battery power of the electric vehicle in the current driving segment is greater than a preset battery power and the traffic flow speed of the next driving segment is detected to be increasing, reducing the number of electrical devices that need to be turned on and / or the power of the electrical devices that are already turned on in the electric vehicle; during the process of the electric vehicle traveling along the current driving segment, when the remaining battery power of the electric vehicle in the current driving segment is greater than a preset battery power and the traffic flow speed of the next driving segment is detected to be decreasing, increasing the number of electrical devices that need to be turned on and / or the power of the electrical devices that are already turned on in the electric vehicle.

[0118] Traffic flow speed refers to the distance a traffic flow travels per unit of time.

[0119] When the traffic flow speed is detected to be increasing for the next travel segment, it means that the electric vehicle will be able to travel more smoothly in the next travel segment, without the need for frequent acceleration and deceleration, and the predicted energy recovery power is low.

[0120] In this case, by reducing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that are already turned on, the energy consumption power can be reduced, thus avoiding excessive power consumption.

[0121] In one embodiment, the greater the increased traffic flow speed detected, the smaller the predicted energy recovery power, and the smaller the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices in the electric vehicle, the greater the reduction in energy consumption power. This allows for flexible control of the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices in the electric vehicle based on the increase in traffic flow speed in the next travel segment. This enables the reduction of energy consumption power under different increases in traffic flow speed, avoiding excessive power consumption.

[0122] For ease of understanding, see Figure 11 , Figure 11 This paper presents a time-series diagram showing traffic flow speed, predicted energy recovery power, energy consumption power, and remaining power, according to an embodiment of this application.

[0123] like Figure 11 As shown, it is predicted that after time t when the electric vehicle enters the next road segment, the traffic flow speed will increase, and the predicted energy recovery power will decrease. Before time t, the energy consumption power is reduced. After time t, the higher the traffic flow speed, the lower the energy recovery power, and before time t, the lower the reduced energy consumption power. Throughout this process, the remaining battery power of the electric vehicle is always greater than the preset battery power and less than the battery power threshold.

[0124] When the traffic flow speed is detected to be decreasing in the next travel segment, it means that the smoothness of the electric vehicle's travel in the next travel segment will be reduced, requiring frequent acceleration and deceleration, and the predicted energy recovery power will be high.

[0125] In this situation, by increasing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the already turned-on electrical devices, the energy consumption power of the electric vehicle is increased before the electric vehicle enters the next driving segment. This avoids the situation where the braking capacity of the drive system is limited due to the large amount of remaining power in the electric vehicle, and ensures the braking capacity of the electric vehicle.

[0126] In one embodiment, the smaller the detected reduced traffic flow speed, the greater the predicted energy recovery power. This leads to a greater number of electrical devices that need to be turned on in the electric vehicle and / or the greater the power of the already turned-on electrical devices, resulting in a greater increase in energy consumption power. This allows for flexible control of the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices based on the reduction in traffic flow speed in the next travel segment. This ensures that energy consumption power and energy recovery power can be balanced under different reductions in traffic flow speed, avoiding situations where the braking capacity of the drive system is limited due to excessive remaining battery power in the electric vehicle.

[0127] For ease of understanding, see Figure 12 , Figure 12 This paper presents a timing diagram of another traffic flow speed, predicted energy recovery power, energy consumption power, and remaining power, provided by an embodiment of this application.

[0128] like Figure 12 As shown, it is predicted that after time t when the electric vehicle enters the next travel segment, the traffic flow speed will decrease, and the predicted energy recovery power will increase. Before time t, the energy consumption power will increase. After time t, the lower the traffic flow speed, the greater the predicted energy recovery power, and before time t, the greater the increased energy consumption power. Throughout this process, the remaining battery power of the electric vehicle is always greater than the preset battery power and less than the battery power threshold.

[0129] In this embodiment, after the electric vehicle enters a road segment with increased traffic flow speed, the smoothness of its driving increases, eliminating the need for frequent acceleration and deceleration, and the predicted energy recovery power is low. When the electric vehicle has a significant amount of remaining battery power in the current road segment and the traffic flow speed is detected as increasing for the next segment, the energy consumption power is reduced by decreasing the number of electrical devices that need to be turned on in the electric vehicle and / or the power of already turned-on electrical devices. This prevents excessive power consumption when the electric vehicle enters a road segment with increased traffic flow speed.

[0130] Furthermore, when electric vehicles enter road sections with reduced traffic flow, their driving smoothness decreases, requiring frequent acceleration and deceleration, and resulting in a high predicted energy recovery power. If the electric vehicle has a significant amount of remaining battery power in the current road segment and the detected traffic flow information for the next segment indicates reduced speed, the energy consumption power of the electric vehicle can be increased by increasing the number of electrical devices that need to be activated and / or the power of already activated devices. This ensures that the energy consumption power and energy recovery power are balanced when the electric vehicle enters a road segment with reduced traffic flow, preventing the braking capacity of the drive system from being limited due to a large amount of remaining battery power, thus ensuring driving safety.

[0131] As can be seen from the above, the remaining battery power of an electric vehicle in the current driving segment affects the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices in the next driving segment. Specifically, in one embodiment, the control method includes: as the electric vehicle travels along the current driving segment, the greater the remaining battery power of the electric vehicle in the current driving segment, the fewer the number of electrical devices that need to be turned on and / or the lower the power of the already turned-on electrical devices.

[0132] The greater the remaining charge of an electric vehicle on its current route, the more recovered energy can be charged into the battery. In this case, by minimizing the number of electrical devices that need to be turned on and / or reducing the power of already activated devices, energy consumption can be reduced, allowing more recovered energy to be charged into the battery and improving the energy recovery efficiency of the electric vehicle.

[0133] During the operation of an electric vehicle, the temperature of the drive motor also needs to be considered. Specifically, in one embodiment, the control method further includes: during the operation of the electric vehicle along the target driving path, when it is predicted that the temperature of the drive motor of the drive system will exceed a temperature threshold after a preset time, the drive system is actively controlled to reduce the output reverse torque before the brake pedal opening begins to decrease.

[0134] If the temperature of the drive motor exceeds the temperature threshold, it indicates that the drive motor is overheating. If the drive system continues to output a certain amount of reverse torque, it will cause damage to the drive motor, insufficient braking capacity of the drive system, and affect driving safety.

[0135] If the drive motor is predicted to overheat after a preset time, the system will actively control the drive system to reduce the output reverse torque before the brake pedal opening begins to decrease, i.e., before the driver actively reduces the brake pedal opening. This will lower the temperature of the drive motor in advance before the electric vehicle enters the next driving segment, preventing the drive motor from overheating and ensuring driving safety.

[0136] The preset duration refers to the time required to intervene in advance and reduce the temperature of the drive motor.

[0137] For ease of understanding, see Figure 13 , Figure 13 The illustration shows a timing diagram of the brake pedal opening, the predicted temperature of the drive motor, the reverse torque output by the drive system, and the actual temperature of the drive motor, according to an embodiment of this application.

[0138] like Figure 13 As shown, at the first time t1, the predicted temperature of the drive motor is less than the temperature threshold, the drive system outputs reverse torque, the opening of the brake pedal remains unchanged, and it is predicted that the temperature of the drive motor at the second time t2 will be greater than the temperature threshold.

[0139] After the first moment t1 and before the third moment t3 when the brake pedal opening begins to decrease, the brake pedal opening remains unchanged, and the reverse torque output by the drive system decreases so that the actual temperature of the drive motor at the second moment t2 is less than the temperature threshold.

[0140] During the operation of an electric vehicle, the magnitude of the reverse torque that the drive system can output is limited, meaning the braking capacity of the drive system is limited, and braking distance must also be considered. In one embodiment, see... Figure 14 , Figure 14 A flowchart of another control method for an electric vehicle provided in an embodiment of this application is shown. The control method further includes: during the process of the electric vehicle traveling along a target driving path, when it is predicted that the deceleration required to reduce the speed of the electric vehicle to zero after a preset distance is greater than the preset deceleration, actively controlling the braking system of the electric vehicle to output braking force during the process of controlling the drive system to output reverse torque.

[0141] The preset deceleration refers to the maximum deceleration that the drive system can provide, and the preset distance is the distance at which the electric vehicle can brake. When the required deceleration of the electric vehicle is greater than the preset deceleration, it means that braking by the drive system alone cannot slow the electric vehicle to a stop within the preset distance.

[0142] In this situation, while controlling the output of reverse torque by the drive system, the braking system of the electric vehicle is actively controlled to output braking force. The braking system provides a portion of the braking force, and the braking system and drive system work together to brake, thereby allowing the electric vehicle to decelerate and stop within a preset distance.

[0143] In one embodiment, see further. Figure 14During the process of controlling the output reverse torque of the drive system, the temperature of the drive motor of the drive system can be predicted. When it is predicted that the temperature of the drive motor of the drive system is greater than the temperature threshold after a preset time, the drive system is actively controlled to reduce the output reverse torque. The braking force lost after the reverse torque is reduced can be supplemented by the braking system.

[0144] Furthermore, the aforementioned control process can also be displayed on the central control screen of the electric vehicle, which is beneficial for the driver to directly obtain relevant information. In one embodiment, the control method specifically includes: during the electric vehicle's travel along the target driving path, displaying on the electric vehicle's central control screen at least one of the following: changes in road condition information of the target driving path, changes in the number of activated electrical devices, and changes in the power of activated electrical devices, wherein the changes in the number of activated electrical devices and the changes in the power of activated electrical devices change with the changes in road condition information of the target driving path.

[0145] Changes in road conditions along the target driving route, such as an uphill slope ahead or a traffic jam ahead. Changes in the number and power of activated electrical devices, such as turning on the air conditioning (cooling / heating), increasing the air conditioning's cooling / heating power, turning on seat ventilation, turning on seat massage, turning on lights, etc.

[0146] The changes in the number of activated electrical devices and the power of activated electrical devices correspond to changes in road condition information. For example, if the road ahead is uphill, the number of activated electrical devices decreases or the power of activated electrical devices decreases.

[0147] In one embodiment, the central control screen can display at least one of the following three things on two separate pages: changes in road conditions, changes in the number of activated electrical devices, the identifiers of activated electrical devices, or changes in the power of activated electrical devices.

[0148] Drivers can freely choose to display at least one of the following pages on the central control screen: pages related to road conditions, pages related to changes in the number of activated electrical devices, pages related to the identification of activated electrical devices, or pages related to changes in the power of activated electrical devices. They can also choose the size of the displayed pages and customize the page display format.

[0149] For example, traffic information is represented in the form of electronic maps. Different traffic conditions are displayed in different colors on the target driving route in the electronic map. For example, uphill sections are red sections and downhill sections are blue sections. The power changes of the activated electrical equipment can be represented in real time as bar charts or curves. For example, the Y-axis represents the operating power of the electrical equipment, and the X-axis represents time or driving distance.

[0150] In another embodiment, since the number of activated electrical devices or the power of activated electrical devices changes with the road condition information of the target driving path, the changes in road condition information can be displayed on a single page on the central control screen. See [link to relevant documentation]. Figure 15 , Figure 15 This illustration shows a schematic diagram of a central control screen page provided in an embodiment of this application. Figure 15 As can be seen from the image, the road ahead of the electric vehicle is a red light, or the road condition information can be displayed on a page on the central control screen, showing signs indicating that electrical equipment is already in use.

[0151] For example, in the form of an electronic map, different road conditions and different electrical devices can be displayed in different colors on the target driving path. For example, uphill sections with activated electrical devices are green. At the same time, the specific power values ​​of the electrical devices can be displayed in the area near the target driving path.

[0152] In one embodiment, a prompt message can also be output, which can be prompted by text and / or voice, such as being displayed on the central control screen and announced by voice in the cabin as "Uphill ahead is predicted".

[0153] In this embodiment, during the electric vehicle's journey along the target driving path, at least one of the following is displayed on the electric vehicle's central control screen: changes in road conditions along the target driving path, changes in the number of activated electrical devices, and changes in the power of activated electrical devices. The changes in the number of activated electrical devices and the power of activated electrical devices change with the changes in road conditions along the target driving path. These changes are visualized, allowing the user to understand the vehicle's status in advance, avoiding anxiety caused by sudden changes in the control process (such as sudden high-speed fan noise), building trust, and improving the user experience.

[0154] In another embodiment, the control method further includes: when it is predicted that the deceleration required to reduce the speed of the electric vehicle to zero after a preset distance is greater than a preset deceleration, displaying a prompt message on the central control screen of the electric vehicle, the prompt message being used to indicate that the braking capacity of the drive system is insufficient.

[0155] In one embodiment, the prompt message can be displayed on the central control screen with a special identifier, such as a red exclamation mark triangle.

[0156] In another embodiment, the prompt message can be displayed on the central control screen as a pop-up page.

[0157] While displaying prompts on the central control screen, the system can also provide prompts to the driver through voice broadcasts and / or light indicators.

[0158] In this embodiment, if braking by the drive system alone is insufficient to slow down and stop the electric vehicle within a preset distance, a prompt message is displayed on the central control screen to alert the driver that the current braking system's braking capacity is insufficient and that early braking is necessary to ensure driving safety.

[0159] This application provides a controller for executing the electric vehicle control method provided in the above embodiments.

[0160] The controller is used to: acquire the current location information and destination information of the electric vehicle; acquire the predicted energy recovery power and predicted energy consumption power of the electric vehicle based on the road condition information corresponding to the target driving path from the current location information to the destination information; during the electric vehicle's travel along the target driving path, control the reverse torque output of the drive system to change with the opening of the electric vehicle's brake pedal; and during the reverse torque output of the drive system, adjust the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices in the electric vehicle based on the remaining battery power, predicted energy recovery power, and predicted energy consumption power of the electric vehicle.

[0161] For ease of understanding, see Figure 16 , Figure 16 A schematic diagram of a controller provided in an embodiment of this application is shown.

[0162] like Figure 16 As shown, the controller acquires navigation information, remaining battery power, and brake pedal opening. The navigation information includes road condition information for the target driving route from the current location to the destination, including traffic light conditions, number of traffic lights, congestion level, road gradient, and traffic flow speed. Then, the controller calculates the predicted energy recovery power and predicted energy consumption power of the electric vehicle traveling along the target driving route based on the received information. Based on the remaining battery power, predicted energy recovery power, and predicted energy consumption power, the controller adjusts the number of electrical devices to be turned on and / or the power of already turned-on electrical devices. Finally, the controller controls the drive system to output reverse torque based on the brake pedal opening.

[0163] In one embodiment, the controller can be a vehicle controller or a controller specifically designed for the control method proposed in this application. Furthermore, the two can serve as redundant backups for each other, improving the operational reliability of the electrical equipment.

[0164] In summary, the embodiments of this application do not require any changes to the hardware in practical applications.

[0165] In another embodiment of this application, an electric vehicle is also provided. The electric vehicle includes a controller, a drive system, and electrical equipment, wherein: The controller is used to: acquire the current location information and destination information of the electric vehicle, and acquire the predicted energy recovery power and predicted energy consumption power of the electric vehicle based on the road condition information corresponding to the target driving path from the current location information to the destination information. During the electric vehicle's journey along the target path, the reverse torque output by the drive system is adjusted based on the opening of the electric vehicle's brake pedal, and the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices are adjusted based on the remaining battery power, predicted energy recovery power, and predicted energy consumption power of the electric vehicle at its current location.

[0166] It is understood that all relevant content of each step involved in the above method embodiments can be referenced in the embodiments of the controller and electric vehicle, and will not be repeated here.

[0167] Finally, it should be noted that the above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A control method for an electric vehicle, characterized in that, The control method is used to adjust the energy consumption power of the electric vehicle during braking of the electric vehicle through the drive system to ensure the braking capability of the electric vehicle. The control method includes: The current location information and destination information of the electric vehicle are obtained, and the predicted energy recovery power and predicted energy consumption power of the electric vehicle are obtained based on the road condition information corresponding to the target driving path from the current location information to the destination information. During the electric vehicle's travel along the target driving path, the reverse torque output by the drive system changes with the opening of the electric vehicle's brake pedal. Furthermore, during the reverse torque output by the drive system, the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices are adjusted based on the electric vehicle's remaining battery power, the predicted energy recovery power, and the predicted energy consumption power.

2. The control method according to claim 1, characterized in that, The target driving path is divided into multiple driving segments, and the control method specifically includes: During the process of the electric vehicle traveling along the current road segment, when the remaining battery power of the electric vehicle in the current road segment is greater than the preset battery power and the road condition information of the next road segment is detected to be congested, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have been turned on are increased.

3. The control method according to claim 1, characterized in that, The target driving path is divided into multiple driving segments, and the control method specifically includes: During the process of the electric vehicle traveling on the current road segment, when the remaining power of the electric vehicle on the current road segment is greater than the preset power and the road condition information of the next road segment is detected to be uphill, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have been turned on are reduced. During the process of the electric vehicle traveling along the current road segment, if the remaining battery power of the electric vehicle in the current road segment is greater than the preset battery power and the road condition information of the next road segment is detected to be downhill, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have already been turned on are increased.

4. The control method according to claim 1, characterized in that, The target driving path is divided into multiple driving segments, and the control method specifically includes: During the process of the electric vehicle traveling along the current road segment, if the remaining battery power of the electric vehicle in the current road segment is greater than the preset battery power and the road condition information of the next road segment is detected as a red light, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that are already turned on are increased.

5. The control method according to claim 1, characterized in that, The target driving path is divided into multiple driving segments, and the control method specifically includes: During the process of the electric vehicle traveling along the current travel segment, when the remaining battery power of the electric vehicle in the current travel segment is greater than the preset battery power and the road condition information of the next travel segment is detected as indicating that the destination has been reached, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have already been turned on are increased.

6. The control method according to claim 1, characterized in that, The target driving path is divided into multiple driving segments, and the control method specifically includes: During the process of the electric vehicle traveling along the current driving segment, when the remaining power of the electric vehicle in the current driving segment is greater than the preset power and the road condition information of the next driving segment is detected as indicating that the destination has been reached, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have been turned on are reduced so that the difference between the remaining power of the electric vehicle after reaching the destination and the power threshold is less than the preset power difference.

7. The control method according to claim 1, characterized in that, The target driving path is divided into multiple driving segments, and the control method specifically includes: During the process of the electric vehicle traveling along the current travel segment, when the remaining power of the electric vehicle in the current travel segment is greater than the preset power and the road condition information of the next travel segment is detected as an increase in traffic flow speed, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have been turned on are reduced. During the process of the electric vehicle traveling along the current travel segment, when the remaining battery power of the electric vehicle in the current travel segment is greater than the preset battery power and the road condition information of the next travel segment is detected as a decrease in traffic flow speed, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have been turned on are increased.

8. The control method according to any one of claims 2-7, characterized in that, The control method specifically includes: As the electric vehicle travels along the current route, the greater the remaining battery power of the electric vehicle in the current route, the fewer electrical devices that need to be turned on in the electric vehicle and / or the lower the power of the electrical devices that are already turned on.

9. The control method according to any one of claims 2-7, characterized in that, The control method specifically includes: During the process of the electric vehicle traveling along the current road segment, if the slope of the downhill road condition is greater, the traffic flow speed is lower after the reduction, or the congestion is more severe, the number of electrical devices that need to be turned on in the electric vehicle and / or the power of the electrical devices that have been turned on should be greater.

10. The control method according to any one of claims 1-7, characterized in that, The control method specifically includes: During the electric vehicle's journey along the target driving path, the central control screen of the electric vehicle displays at least one of the following: changes in road condition information of the target driving path, changes in the number of activated electrical devices, and changes in the power of the activated electrical devices. The changes in the number of activated electrical devices and the changes in the power of the activated electrical devices change with the changes in road condition information of the target driving path.

11. The control method according to claim 1, characterized in that, The target driving path is divided into multiple driving segments, and the control method further includes: During the electric vehicle's journey along the target driving path, if it is predicted that the temperature of the drive motor of the drive system will exceed a temperature threshold after a preset time, the drive system will be actively controlled to reduce the output reverse torque before the brake pedal opening begins to decrease.

12. The control method according to claim 1, characterized in that, The control method further includes: During the electric vehicle's journey along the target path, if it is predicted that the deceleration required to reduce the electric vehicle's speed to zero after a preset distance is greater than the preset deceleration, the braking system of the electric vehicle is actively controlled to output braking force while controlling the output of reverse torque in the drive system.

13. The control method according to claim 12, characterized in that, The control method further includes: When it is predicted that the deceleration required to reduce the speed of the electric vehicle to zero after a preset distance is greater than the preset deceleration, a prompt message is displayed on the central control screen of the electric vehicle. The prompt message is used to indicate that the braking capacity of the drive system is insufficient.

14. A controller, characterized in that, The controller is used for: The current location information and destination information of the electric vehicle are obtained, and the predicted energy recovery power and predicted energy consumption power of the electric vehicle are obtained based on the road condition information corresponding to the target driving path from the current location information to the destination information. During the electric vehicle's travel along the target driving path, the reverse torque output by the drive system is adjusted according to the opening of the electric vehicle's brake pedal, and the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices are adjusted according to the remaining battery power of the electric vehicle at the current location information, the predicted energy recovery power, and the predicted energy consumption power.

15. An electric vehicle, characterized in that, The electric vehicle includes a controller, a drive system, and electrical equipment, wherein: The controller is used for: The current location information and destination information of the electric vehicle are obtained, and the predicted energy recovery power and predicted energy consumption power of the electric vehicle are obtained based on the road condition information corresponding to the target driving path from the current location information to the destination information. During the electric vehicle's travel along the target driving path, the reverse torque output by the drive system is adjusted according to the opening of the electric vehicle's brake pedal, and the number of electrical devices that need to be turned on and / or the power of the already turned-on electrical devices are adjusted according to the remaining battery power of the electric vehicle at the current location information, the predicted energy recovery power, and the predicted energy consumption power.

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