Power-saving control methods, systems, storage media, and devices based on average vehicle speed

Abstract

This invention provides a power-saving control method, system, storage medium, and device based on average vehicle speed. The method includes: collecting the average vehicle speed over a preset time period; calculating a correction value for adjusting the target power-saving state of charge (SOC) based on the average vehicle speed; determining whether the current target SOC needs to be increased; and, based on the determination result, adjusting the target SOC based on the correction value; memorizing the adjusted target SOC; and performing power-saving based on the adjusted target SOC when power is restored again. This invention's power-saving control method based on average vehicle speed improves the driving experience.

Description

Technical Field

[0001] This invention belongs to the field of vehicle control, and particularly relates to a power-saving control method, system, storage medium and device based on average vehicle speed. Background Technology

[0002] New energy hybrid electric vehicles combine an internal combustion engine and an electric motor, improving fuel economy and reducing emissions. Battery protection control is a key technology for hybrid electric vehicles, determining the battery's charging and discharging strategies and significantly impacting vehicle performance, energy consumption, and driving experience. Optimizing battery protection control strategies can significantly improve the fuel economy, power, and driving experience of hybrid electric vehicles.

[0003] Currently, all new energy hybrid vehicles are equipped with a battery protection function. This function allows the vehicle to travel a certain distance in pure electric mode, thereby improving fuel economy and reducing emissions. The Energy Management System (EMS) continuously monitors the battery level. When the battery level reaches a set threshold, the EMS activates the battery protection mode. In this mode, the engine stops running, and the vehicle relies entirely on battery power, operating in pure electric mode. When the battery is depleted or more power is needed, the EMS exits the battery protection mode, and the engine restarts.

[0004] However, the existing battery-saving function does not consider the average vehicle speed during driving, and the battery-saving strategy is the same for long-term highway driving and city driving. Therefore, during long-distance and high-speed driving, it cannot automatically save battery power based on the average vehicle speed, resulting in battery depletion, power reduction, and a poor driving experience during long-term high-speed driving. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a power conservation control method, system, storage medium, and device based on average vehicle speed. Based on the average vehicle speed, a correction value for the power conservation SOC target value is determined. The power conservation SOC target value is then corrected based on the judgment result of the current power conservation SOC target value. This allows for automatic power conservation settings based on average vehicle speed, achieving the goal of maintaining the same power performance at both high and low speeds, thus improving the driving experience.

[0006] This invention is achieved through the following technical solution:

[0007] The average vehicle speed is collected within a preset time period, and a correction value is calculated based on the average vehicle speed to correct the SOC target value for power preservation.

[0008] Determine whether the current power supply SOC target value needs to be increased, and based on the determination result, adjust the power supply SOC target value according to the adjustment value;

[0009] The corrected SOC target value for power preservation is memorized, and power preservation is performed based on the corrected SOC target value when power is restored.

[0010] Optional,

[0011] The step of calculating the correction value for adjusting the SOC target value based on the average vehicle speed includes:

[0012] Determining the average vehicle speed includes:

[0013] If the average vehicle speed is lower than the preset threshold, the target value of the battery SOC during driving will not be corrected.

[0014] If the average vehicle speed is higher than a preset threshold, then a correction value is calculated based on the average vehicle speed to adjust the target value of the power supply SOC.

[0015] Optional,

[0016] The correction of the power supply SOC target value includes:

[0017] The power supply SOC target value is increased by the correction value on top of the preset base SOC target value.

[0018] Optional,

[0019] The determination of whether the current power supply SOC target value needs to be increased includes:

[0020] The vehicle control unit (VCU) determines whether the current state of charge (SOC) target value needs to be increased.

[0021] Optional,

[0022] The method further includes:

[0023] The corrected SOC target value is fed back to the screen display, and the corrected value is set to zero.

[0024] Optional,

[0025] The method further includes:

[0026] After the correction is performed, the series and parallel drive conditions are determined:

[0027] If it is a parallel drive, then the torque is weighted by the engine drive torque;

[0028] If it is a series drive, the power generation is weighted based on vehicle speed.

[0029] The present invention also provides a power conservation control system based on average vehicle speed for implementing the aforementioned method, the system comprising:

[0030] The vehicle speed determination module is used to collect the average vehicle speed within a preset time and calculate the correction value for the power preservation SOC target value based on the average vehicle speed.

[0031] The power supply control module is used to determine whether the current power supply SOC target value needs to be increased, and based on the determination result, to modify the power supply SOC target value based on the correction value.

[0032] The correction memory module is used to remember the corrected power-saving SOC target value, and to perform power saving based on the corrected power-saving SOC target value when power is restored.

[0033] Optional,

[0034] The vehicle speed determination module is also configured to:

[0035] Determining the average vehicle speed includes:

[0036] If the average vehicle speed is lower than the preset threshold, the target value of the battery SOC during driving will not be corrected.

[0037] If the average vehicle speed is higher than a preset threshold, then a correction value is calculated based on the average vehicle speed to adjust the target value of the power supply SOC.

[0038] Optional,

[0039] The correction of the power supply SOC target value includes:

[0040] The power supply SOC target value is increased by the correction value on top of the preset base SOC target value.

[0041] Optional,

[0042] The power supply control module includes:

[0043] The vehicle control unit (VCU) determines whether the current state of charge (SOC) target value needs to be increased.

[0044] Optional,

[0045] The system also includes:

[0046] After the correction is performed, the series and parallel drive conditions are determined:

[0047] If it is a parallel drive, then the torque is weighted by the engine drive torque;

[0048] If it is a series drive, the power generation is weighted based on vehicle speed.

[0049] The present invention also provides a computer-readable storage medium storing one or more programs, which, when executed, can implement the aforementioned power-saving control method based on average vehicle speed.

[0050] The present invention also provides a device, including a processor, a communication interface, a computer-readable storage medium, and a communication bus; wherein the processor, the communication interface, and the computer-readable storage medium communicate with each other through the communication bus;

[0051] The processor is used to execute programs stored in a computer-readable storage medium.

[0052] Compared with the prior art, the present invention has the following advantages:

[0053] 1. The power conservation control method based on average vehicle speed proposed in this invention distinguishes the control of the SOC target value under different average vehicle speeds based on the judgment of average vehicle speed, so as to achieve the same power performance at both low speed and high speed driving, thereby improving the driving experience.

[0054] 2. When driving at high speed, the SOC target value is corrected based on the average vehicle speed. By increasing the SOC target value, the power storage is improved, ensuring sufficient power for electric driving and optimizing the power retention effect. When driving at low speed, the SOC target value is not corrected.

[0055] 3. While driving, the system automatically adjusts the battery protection settings based on the average vehicle speed to improve the user experience and driving performance.

[0056] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0057] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 A flowchart illustrating the power conservation control method based on average vehicle speed is shown.

[0059] Figure 2 A schematic block diagram of the power conservation control system based on average vehicle speed is shown.

[0060] Figure 3 A schematic diagram of the VCU interaction function according to an embodiment of the present invention is shown;

[0061] Figure 4A schematic diagram of the VCU control logic according to an embodiment of the present invention is shown;

[0062] Figure 5 This is a schematic diagram of the structure of a device according to an embodiment of the present invention. Detailed Implementation

[0063] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] See appendix Figure 1 The method of the present invention includes:

[0065] S1. Collect the average vehicle speed within a preset time period, and calculate the correction value for the SOC target value based on the average vehicle speed.

[0066] The correction value for adjusting the target SOC (State of Charge) based on the average vehicle speed includes:

[0067] Determining the average vehicle speed includes:

[0068] If the average vehicle speed is lower than the preset threshold, the target value of the battery SOC during driving will not be corrected.

[0069] If the average vehicle speed is higher than a preset threshold, then based on the average vehicle speed, a correction value is calculated to adjust the target SOC value for battery protection.

[0070] Among these, the adjustment to the power supply SOC target value includes:

[0071] The power supply SOC target value is increased by the correction value on top of the preset base SOC target value.

[0072] S2. Determine whether the current power supply SOC target value needs to be increased. Based on the determination result, adjust the power supply SOC target value according to the adjustment value.

[0073] The determination of whether the current power supply SOC target value needs to be increased includes:

[0074] The vehicle control unit (VCU) determines whether the current state of charge (SOC) target value needs to be increased.

[0075] S3. Memory the corrected SOC target value for power preservation, and perform power preservation based on the corrected SOC target value when power is restored.

[0076] The method also includes:

[0077] The corrected SOC target value is fed back to the screen display, and the corrected value is set to zero.

[0078] The method also includes:

[0079] After the correction is performed, the series and parallel drive conditions are determined:

[0080] If it is a parallel drive, then the torque is weighted by the engine drive torque;

[0081] If it is a series drive, the power generation is weighted based on vehicle speed.

[0082] Specifically,

[0083] 1. Based on the average vehicle speed, calculate the correction value for adjusting the SOC target value for battery protection.

[0084] 1. Determine the average vehicle speed.

[0085] Determining average vehicle speed includes:

[0086] If the average vehicle speed is lower than the preset threshold, the target value of the battery SOC during driving will not be corrected.

[0087] If the average vehicle speed is higher than a preset threshold, then a correction value is calculated based on the average vehicle speed to adjust the target value of the power supply SOC.

[0088] 2. Calculate the correction value.

[0089] Based on the average vehicle speed, calculate the correction value for adjusting the SOC target value for battery protection.

[0090] In this embodiment, the ratio of the mileage traveled to the time within a preset time period is obtained as the average vehicle speed V. Based on a preset vehicle speed threshold K1, the average vehicle speed V is judged as follows:

[0091] If the average vehicle speed V is lower than the threshold K1, it means that the vehicle is currently in a low-speed state, and no correction will be made to the SOC target value during driving.

[0092] If the average vehicle speed V is higher than the threshold K1, it means that the vehicle is currently in a high-speed state, and the correction value for adjusting the SOC target value is calculated.

[0093] Optionally, the calculation of the correction value includes:

[0094] The correction value X is calculated based on the average vehicle speed to adjust the SOC target value, where: X = V / 10, and the value of X is an integer, with a maximum value of 10 and a minimum value of 1.

[0095] The power supply SOC target value is modified by adding the modified value to the preset base SOC target value.

[0096] For example: If the current average vehicle speed is 70 and the threshold K1 is set to 60, then the correction value X = 70 / 10 = 7.

[0097] The preset base SOC target value is 25, and the correction value X is 7. Then the corrected power supply target SOC value is 25 + 7 = 32.

[0098] In this embodiment, the average vehicle speed is used as the basis for calculating the correction value, rather than as the basis for whether or not to make a correction.

[0099] II. Control the target value of SOC for power supply protection.

[0100] 1. Determine whether the current power supply SOC target value needs to be increased.

[0101] The vehicle control unit (VCU) can determine whether the current power supply SOC target value needs to be increased. If the determination result is that it needs to be increased, the power supply SOC target value is corrected based on the correction value.

[0102] In this embodiment, the VCU can determine whether the current power supply SOC target value needs to be increased through the following process:

[0103] The battery's real-time SOC value is obtained by communicating with the battery management system (BMS).

[0104] The obtained real-time SOC value is compared with the current power-saving SOC target value:

[0105] If the real-time SOC value is higher than the current power supply SOC target value, it is determined that the current power supply SOC target value does not need to be increased.

[0106] If the real-time SOC value is lower than the current power-saving SOC target value, the data collected by the vehicle sensors will be analyzed to determine whether the current power-saving SOC target value should be increased.

[0107] Analyzing the data collected by vehicle sensors to determine whether to increase the current SOC (State of Charge) target value may include:

[0108] Analyze historical SOC data of the battery to understand the battery's charging and discharging patterns and battery health. If historical data shows that the SOC value continues to decline or is lower than expected, it is necessary to increase the target SOC value for maintaining battery power.

[0109] Based on the vehicle's current operating conditions, such as mileage, driving style, and load, if the vehicle is under high load or driving for a long time, it may be necessary to increase the target SOC value to ensure that the battery has sufficient charge.

[0110] Considering environmental parameters such as temperature, humidity, and altitude, extreme temperatures or high altitudes can affect battery performance, and the target SOC value for battery retention may need to be adjusted.

[0111] Based on the above analysis, the VCU can determine whether it is necessary to increase the target value of the power supply SOC.

[0112] Based on the VCU's judgment results, a decision is made as to whether to revise the power supply SOC target value.

[0113] 2. Implement the correction.

[0114] If the VCU determines that the current power supply SOC target value needs to be increased, it will perform a correction to the power supply SOC target value based on the correction value.

[0115] The corrected SOC target value for power preservation is fed back to the screen display, and power preservation is performed according to this SOC target value.

[0116] In this embodiment, the vehicle's powertrain system can be managed through the VCU. By controlling the electric motor, battery, and charging system, vehicle performance and energy consumption can be optimized. The VCU collects relevant data from vehicle sensors; makes corresponding decisions based on the analysis of the collected data; and sends control signals to the corresponding control modules to execute the decisions.

[0117] By increasing the target SOC value for battery charge, the power generation system generates electricity based on the revised target SOC value, thereby increasing the battery capacity. This ensures that the vehicle has more power to provide power when driving at high speeds, thus improving drivability, comfort, and driving needs.

[0118] 3. Remember the corrected SOC target value for power preservation.

[0119] After the vehicle is powered off, the corrected SOC target value is stored in memory, and the correction value X is cleared to zero.

[0120] In this embodiment, assuming the corrected SOC target value for power preservation is 32 before the vehicle is powered off, the screen will still display the corrected SOC target value of 32 after power-off and power-on, and power preservation will proceed accordingly. Simultaneously, the correction value X is reset to zero, and the base SOC value remains at the preset 25.

[0121] If the vehicle speed exceeds the preset threshold again, the correction value X is recalculated, and it is determined whether the target SOC for maintaining battery power needs to be increased based on the target value of 32.

[0122] If it is determined that an increase is needed, the target value of the power supply SOC should be revised to 25+X, where 25+X should be greater than 32.

[0123] If it is determined that no increase is needed, the target value for power preservation SOC will remain at 32.

[0124] After the vehicle is powered off, the corrected SOC target value is memorized and the correction value is cleared to zero. This can avoid repeated corrections, which would cause the SOC target value to be corrected to a very high value in the next correction.

[0125] In this embodiment, a correction upper limit for the target SOC value can also be preset. If it is necessary to lower the target SOC value while driving, the driver can manually adjust it.

[0126] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0127] See appendix Figure 2 The diagram illustrates the structure of a power-saving control system based on average vehicle speed for implementing the above method, including a vehicle speed determination module, a power-saving control module, and a correction memory module.

[0128] The vehicle speed determination module is used to collect the average vehicle speed within a preset time and calculate the correction value for the power preservation SOC target value based on the average vehicle speed.

[0129] The power supply control module is used to determine whether the current power supply SOC target value needs to be increased, and based on the determination result, to modify the power supply SOC target value based on the modification value, and to perform power supply protection based on the modified power supply SOC target value.

[0130] The correction memory module is used to remember the corrected power-saving SOC target value, and to perform power-saving based on the corrected power-saving SOC target value when power is restored.

[0131] Figure 3 This is a schematic diagram of the VCU interaction function according to an embodiment of the present invention.

[0132] The VCU control power-saving SOC target values ​​include:

[0133] The average vehicle speed over a period of time is obtained by using the mileage sent by the instrument and the driving time for the current mileage;

[0134] The current SOC target value and the corrected SOC target value are displayed on the screen;

[0135] The Energy Management System (EMS) continuously monitors the battery's State of Charge (SOC) level. When the SOC reaches the set SOC protection target value, the EMS activates the power protection mode.

[0136] The Actual Energy Consumption (EAC) module calculates energy consumption by monitoring battery voltage and current, and monitors the actual energy consumed by the vehicle. EAC information can be used to adjust power preservation strategies and calculate the vehicle's driving range, etc.

[0137] The Battery Management System (BMS) monitors and controls the charging and discharging of the battery, and manages the actual SOC value of the battery.

[0138] Based on the information input from the aforementioned systems and modules, as well as the user's operation of the accelerator and brake pedals, the VCU determines whether to make corrections based on the current SOC target value. If correction is required, the VCU calculates the correction value, executes the correction, maintains power according to the corrected SOC target value, and displays the corrected SOC target value on the screen.

[0139] The VCU communicates with other modules via the Gateway Control Unit (GCU).

[0140] Figure 4 This is a schematic diagram of the VCU control logic according to an embodiment of the present invention.

[0141] Correction values ​​are calculated based on average vehicle speed;

[0142] Enter the user-defined SOC target value;

[0143] Compare the corrected SOC target value calculated by the VCU with the user-set base SOC target value:

[0144] If the corrected SOC target value calculated by the VCU is greater than the user-set basic SOC target value, then the corrected SOC value is used.

[0145] If the corrected SOC target value calculated by VCU is less than the user-set basic SOC target value, then the user-set basic SOC target value shall be used.

[0146] Determine the operating conditions of series and parallel drives:

[0147] If driven in parallel, the torque is weighted by the engine. In this mode, the engine is the main power source, and the electric motor is mainly used to assist or improve efficiency.

[0148] If it is a series drive, the power generation is weighted based on vehicle speed. In this mode, the engine is mainly used to generate electricity for the motor, which is the main power source.

[0149] Furthermore, embodiments of the present invention also provide a power-saving control device based on average vehicle speed, comprising:

[0150] The vehicle speed determination module collects the average vehicle speed within a preset time period and calculates a correction value for adjusting the target value of battery SOC based on the average vehicle speed. The determination of the average vehicle speed includes: if the average vehicle speed is lower than a preset threshold, then no adjustment is made to the target value of battery SOC during driving; if the average vehicle speed is higher than the preset threshold, then a correction value for adjusting the target value of battery SOC is calculated based on the average vehicle speed.

[0151] The power supply control module determines whether the current power supply SOC target value needs to be increased, and based on the determination result, performs a correction on the power supply SOC target value based on the correction value; wherein the determination of whether the current power supply SOC target value needs to be increased is performed through the vehicle controller (VCU).

[0152] The memory module is modified to store the modified power-saving SOC target value. When power is restored, power saving is performed based on the modified power-saving SOC target value.

[0153] Based on the same inventive concept, the present invention also provides a computer-readable storage medium storing one or more programs, which, when executed, can realize the aforementioned power-saving control method based on average vehicle speed.

[0154] like Figure 5 As shown in the illustration, this embodiment of the invention also provides a device, including a processor, a communication interface, a memory, and a communication bus. The processor, communication interface, and memory communicate with each other via the communication bus.

[0155] The memory is a computer-readable storage medium used to store one or more programs.

[0156] The processor is configured to execute a program stored in a computer-readable storage medium.

[0157] The computer-readable storage medium may be included in the device / apparatus described in the above embodiments; or it may exist independently and not assembled into the device / apparatus.

[0158] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power-saving control method based on average vehicle speed, characterized in that, include: The system collects the average vehicle speed over a preset time period and calculates a correction value for adjusting the target SOC (State of Charge) value based on the average vehicle speed. The calculation of the correction value for adjusting the target SOC value based on the average vehicle speed includes: determining the average vehicle speed; if the average vehicle speed is lower than a preset threshold, no adjustment is made to the target SOC value during driving; if the average vehicle speed is higher than the preset threshold, the correction value for adjusting the target SOC value is calculated based on the average vehicle speed. The adjustment of the target SOC value includes: adding the correction value to the target SOC value, which is a preset base SOC target value. Determine whether the current battery SOC target value needs to be increased. Based on the determination result, adjust the battery SOC target value according to the adjustment value. The determination of whether the current battery SOC target value needs to be increased includes: determining whether the current battery SOC target value needs to be increased through the vehicle control unit (VCU); wherein, the real-time SOC value of the battery is obtained; the obtained real-time SOC value is compared with the current battery SOC target value: if the real-time SOC value is higher than the current battery SOC target value, it is determined that the current battery SOC target value does not need to be increased; if the real-time SOC value is lower than the current battery SOC target value, the data collected by the vehicle sensors is analyzed to determine whether the current battery SOC target value should be increased. The corrected SOC target value for power preservation is memorized, and power preservation is performed based on the corrected SOC target value when power is restored.

2. The method according to claim 1, characterized in that, The method further includes: The corrected SOC target value is fed back to the screen display, and the corrected value is set to zero.

3. The method according to claim 1, characterized in that, The method further includes: After the correction is performed, the series and parallel drive conditions are determined: If it is a parallel drive, then the torque is weighted by the engine drive torque; If it is a series drive, the power generation is weighted based on vehicle speed.

4. A power-saving control system based on average vehicle speed, characterized in that, The system includes: A vehicle speed determination module is used to collect the average vehicle speed within a preset time period and calculate a correction value for adjusting the battery SOC target value based on the average vehicle speed. The vehicle speed determination module is further configured to: determine the average vehicle speed, including: if the average vehicle speed is lower than a preset threshold, then no adjustment is made to the battery SOC target value during driving; if the average vehicle speed is higher than the preset threshold, then a correction value is calculated based on the average vehicle speed to adjust the battery SOC target value; wherein adjusting the battery SOC target value includes: adding the correction value to the battery SOC target value, based on a preset base SOC target value. The battery protection control module is used to determine whether the current battery protection SOC target value needs to be increased. Based on the determination result, and using the correction value, the battery protection SOC target value is corrected. Specifically, the determination of whether the current battery protection SOC target value needs to be increased is achieved through the vehicle control unit (VCU). This involves acquiring the real-time SOC value of the battery and comparing it with the current battery protection SOC target value: if the real-time SOC value is higher than the current battery protection SOC target value, it is determined that the current battery protection SOC target value does not need to be increased; if the real-time SOC value is lower than the current battery protection SOC target value, the data collected by the vehicle sensors is analyzed to determine whether the current battery protection SOC target value should be increased. The correction memory module is used to remember the corrected power-saving SOC target value, and to perform power saving based on the corrected power-saving SOC target value when power is restored.

5. The system according to claim 4, characterized in that, The system also includes: After the correction is performed, the series and parallel drive conditions are determined: If it is a parallel drive, then the torque is weighted by the engine drive torque; If it is a series drive, the power generation is weighted based on vehicle speed.

6. A computer-readable storage medium storing one or more programs, characterized in that, When one or more of these programs are executed, the power-saving control method based on average vehicle speed as described in any one of claims 1-3 can be implemented.

7. An electronic device, comprising a processor, a communication interface, a computer-readable storage medium as described in claim 6, and a communication bus; wherein, The processor, communication interface, and computer-readable storage medium communicate electronically with each other via a communication bus; characterized in that, The processor is used to execute programs stored in a computer-readable storage medium.

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