An energy consumption calculation method, display method, calculation system and vehicle

Abstract

The application discloses an energy consumption calculation method, a display method, a calculation system and a vehicle, and applies to an energy consumption calculation method of a range extending vehicle, which comprises the following steps: obtaining driving time, driving mileage and pure electric driving distance, fuel driving distance, power consumption and oil consumption in a current cycle of the vehicle; calculating reference value weight and real data weight by using a preset dynamic weight calculation formula based on the driving time, the driving mileage, a preset weight attenuation time factor and a preset weight attenuation mileage factor; and calculating current power consumption and current oil consumption by using a preset power consumption calculation formula and a preset oil consumption calculation formula based on the pure electric driving distance, the fuel driving distance, the power consumption, the oil consumption, the reference value weight, the real data weight and preset reference driving distance, preset reference power consumption and preset reference oil consumption. The application can improve the accuracy and real-time performance of energy consumption calculation.

Description

Technical Field

[0001] This invention belongs to the field of new energy vehicle energy management technology, specifically relating to an energy consumption calculation method, display method, calculation system, and vehicle. Background Technology

[0002] Energy consumption reflects the energy efficiency level of a vehicle and is a key factor in guiding energy-saving driving and optimizing cost control; therefore, accurate calculation is required. Currently, there are three main methods for energy consumption calculation: (1) Directly using acquired (collected) data to calculate energy consumption, which has good real-time performance. However, in the early stages of vehicle operation or during short-distance driving, the amount of collected data is limited, and the energy consumption calculation results are prone to large fluctuations, affecting the user's accurate judgment of vehicle energy consumption. (2) Establishing an energy consumption calculation model, combining real-time vehicle data with baseline data to calculate energy consumption. However, it uses a fixed weight or simple averaging method, which leads to the baseline value having too much influence on the calculation results in the early stages of vehicle operation. As driving data accumulates, the baseline value continues to interfere with the calculation results, and cannot truly reflect the actual energy consumption of the vehicle. (3) Using advanced machine learning algorithms, although it improves the accuracy of calculation, the computational complexity is high, making it difficult to meet the real-time requirements of the vehicle system. Summary of the Invention

[0003] The purpose of this invention is to provide an energy consumption calculation method, display method, calculation system, and vehicle to improve the accuracy and real-time performance of energy consumption calculation.

[0004] In a first aspect, the present invention provides an energy consumption calculation method applicable to range-extended electric vehicles (REEVs), wherein the energy consumption of REEVs includes electricity consumption and fuel consumption, and the energy consumption calculation method includes:

[0005] Obtain the vehicle's driving time t, driving distance S, and pure electric driving distance D within the current cycle. EV Fuel-powered driving distance D EVE Electricity consumption E1 and fuel consumption F1. The cycle referred to is either a driving cycle, a trip cycle, or a long-term driving cycle.

[0006] Based on the driving time t, driving mileage S, preset weight decay time factor α and preset weight decay mileage factor β, the baseline weight W0 and the actual data weight W1 are calculated using a preset dynamic weight calculation formula.

[0007] Based on the pure electric driving distance D EV Fuel-powered driving distance D EVE The current electricity consumption Ec and current fuel consumption Fc are calculated using preset electricity consumption calculation formulas and preset fuel consumption calculation formulas, along with preset benchmark driving distance D0, benchmark electricity consumption E0, and benchmark fuel consumption F0, based on preset electricity consumption calculation formulas and preset fuel consumption calculation formulas.

[0008] Preferably, the preset dynamic weight calculation formula is: Where 0 < α < 1 and 0 < β < 1, α corresponds to decay in the time dimension and β corresponds to decay in the mileage dimension. As the driving time t increases and the driving mileage S increases, the baseline weight W0 decays exponentially, while the real data weight W1 gradually increases. In the early stages of the vehicle's current cycle, W0 is relatively large, and the baseline value plays a dominant role in energy consumption calculation; as driving data accumulates, W0 decreases and W1 increases, the influence of the baseline value on the calculation results gradually decreases, and the influence of real data on the calculation results becomes increasingly larger, thus making the calculation results closer to the actual energy consumption.

[0009] Preferably, the preset power consumption calculation formula is: The preset fuel consumption calculation formula is as follows: In the early stages of a vehicle's current cycle, the baseline value dominates the energy consumption calculation, ensuring the stability of the calculation results. As driving data increases, the weight of real data rises, and the energy consumption calculation results gradually approach the accurate value based on real data.

[0010] Secondly, this invention provides an energy consumption display method applied to range-extended vehicles. The method involves controlling the display module to update the displayed electricity consumption and displayed fuel consumption every preset distance traveled by the vehicle. The displayed electricity consumption is the current electricity consumption Ec calculated using the aforementioned energy consumption calculation method, and the displayed fuel consumption is the current fuel consumption Fc calculated using the same method. By controlling the display module to update the displayed electricity consumption and displayed fuel consumption only after the vehicle has traveled a preset distance, timely updates of the displayed electricity consumption and displayed fuel consumption are ensured, while also avoiding poor user experience caused by frequent changes in these figures.

[0011] Thirdly, the present invention provides an energy consumption calculation method applicable to pure electric vehicles, wherein the energy consumption of pure electric vehicles consists only of electricity consumption. The energy consumption calculation method includes:

[0012] Obtain the vehicle's driving time t, driving distance S, and power consumption E1 within the current cycle. The cycle can be a driving cycle, a subtotal cycle, or a long-term driving cycle.

[0013] Based on the driving time t, driving mileage S, preset weight decay time factor α and preset weight decay mileage factor β, the baseline weight W0 and the actual data weight W1 are calculated using a preset dynamic weight calculation formula.

[0014] Based on the driving mileage S, power consumption E1, baseline weight W0, real data weight W1, and preset baseline driving distance D0 and baseline power consumption E0, the current power consumption Ec is calculated using a preset power consumption calculation formula.

[0015] Preferably, the preset dynamic weight calculation formula is: Where 0 < α < 1 and 0 < β < 1, α corresponds to the decay in the time dimension and β corresponds to the decay in the mileage dimension. As the driving time t increases and the driving mileage S increases, the baseline weight W0 decays exponentially, while the real data weight W1 gradually increases. In the early stages of the vehicle's current cycle, W0 is relatively large, and the baseline value plays a dominant role in energy consumption calculation; as driving data accumulates, W0 decreases and W1 increases, and the influence of real data on the calculation results becomes increasingly significant.

[0016] Preferably, the preset power consumption calculation formula is: In the early stages of a vehicle's current cycle, the baseline value dominates the energy consumption calculation, ensuring the stability of the calculation results. As driving data increases, the weight of real data rises, and the energy consumption calculation results gradually approach the accurate value based on real data.

[0017] Fourthly, this invention provides an energy consumption display method applied to pure electric vehicles. The method involves controlling the display module to update the displayed energy consumption every preset distance the vehicle travels. The displayed energy consumption is the current energy consumption Ec calculated using the aforementioned energy consumption calculation method. By controlling the display module to update the displayed energy consumption only after the vehicle has traveled a preset distance, timely updates to the displayed energy consumption are ensured, while avoiding poor user experience caused by frequent changes in the displayed energy consumption.

[0018] Fifthly, the present invention provides an energy consumption calculation system, including a controller configured to execute the above-described energy consumption calculation method.

[0019] In a sixth aspect, the present invention provides a vehicle that includes the above-described energy consumption calculation system.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] (1) By using a dynamic weight decay mechanism, the long-term interference of the benchmark value on energy consumption calculation is effectively reduced, so that the energy consumption calculation result remains stable in the early stage of the cycle and gradually approaches the actual energy consumption as the driving mileage increases. Compared with the fixed weight algorithm, the calculation error can be reduced by 10% to 40%, which improves the accuracy of energy consumption calculation.

[0022] (2) The calculation process does not rely on complex model training, has low computational complexity, does not require high on-board computing resources, can meet real-time computing needs, and can complete energy consumption calculation in a short time, thus improving the real-time performance of energy consumption calculation.

[0023] (3) It reduces the fluctuation of energy consumption display, provides users with more stable and reliable energy consumption information, which helps users plan their trips and charging plans more accurately and improves the user experience. Attached Figure Description

[0024] Figure 1 This is a flowchart of the energy consumption calculation method applied to range-extended vehicles in an embodiment of the present invention.

[0025] Figure 2 This is a flowchart of an energy consumption calculation method applied to pure electric vehicles in an embodiment of the present invention. Detailed Implementation

[0026] To gain a more detailed understanding of the features and technical content of the embodiments of the present invention, the implementation of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for reference and illustration only and are not intended to limit the embodiments of the present invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing embodiments of the invention only and is not intended to limit the invention.

[0028] In the following description, references are made to “some embodiments,” which describe a subset of all possible embodiments. However, it is understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0029] like Figure 1 As shown, the energy consumption calculation method applied to range-extended vehicles in this embodiment of the invention includes the following steps:

[0030] S11. Obtain the vehicle's current driving time t, driving distance S, and pure electric driving distance D within the current cycle. EV Fuel-powered driving distance D EVE Electricity consumption E1 and fuel consumption F1. Here, the cycle refers to the driving cycle, trip cycle, or long-term driving cycle, that is, the current driving cycle, the current trip cycle, or the current long-term driving cycle of the vehicle.

[0031] In some embodiments, the controller obtains the mileage S within the current cycle through an odometer composed of a high-precision Hall sensor or an optical encoder. The mileage traveled when the engine is not running is the pure electric driving distance D. EV The distance traveled after the engine starts is the fuel-powered driving distance D. EVE Therefore, S = D EV +D EVE .

[0032] In some embodiments, the controller obtains the voltage and current of the power battery from the battery management system and integrates them to obtain the power consumption E1 in the current cycle of the vehicle. Alternatively, the controller can also integrate the power of the drive motor (obtained from the drive system) to obtain the power consumption E1 in the current cycle of the vehicle.

[0033] In some embodiments, the controller obtains 100ms of fuel consumption from the engine management system, then integrates it to obtain the fuel consumption F1 in the current cycle of the vehicle.

[0034] S12. Based on the vehicle's current cycle driving time t (unit: hours), driving distance S (unit: km), and preset weight decay time factor α and preset weight decay distance factor β, the baseline weight W0 and the actual data weight W1 are calculated using the preset dynamic weight calculation formula.

[0035] In some embodiments, the preset dynamic weight calculation formula is: Where 0 < α < 1, 0 < β < 1. α corresponds to the decay in the time dimension, and β corresponds to the decay in the mileage dimension. As the driving time t increases and the driving mileage S increases, the baseline weight W0 decays exponentially, while the actual data weight W1 gradually increases. The specific values ​​of α and β are obtained through calibration methods based on the target vehicle's announced energy consumption and real-vehicle verification.

[0036] S13, Based on the pure electric driving distance D in the current cycle of the vehicle EV (Unit: km), fuel-powered driving distance D EVE (Unit: km), power consumption E1 (unit: kWh), fuel consumption F1 (unit: L), and baseline weight W0, real data weight W1, preset baseline driving distance D0, preset baseline power consumption E0, and preset baseline fuel consumption F0 are used to calculate the current power consumption Ec and current fuel consumption Fc using preset power consumption calculation formulas and preset fuel consumption calculation formulas.

[0037] In some embodiments, the preset power consumption calculation formula is: The preset fuel consumption calculation formula is: Here, energy consumption Ec is measured in kWh / 100km, and fuel consumption Fc is measured in L / 100km. The specific values ​​of D0, E0, and F0 are obtained through calibration methods based on the announced energy consumption of the target vehicle type (e.g., sedan, SUV, etc.) and real-vehicle verification.

[0038] The energy consumption display method applied to range-extended vehicles in this embodiment of the invention is as follows: Every time the vehicle travels a preset distance, the control display module (e.g., the central control screen) updates the displayed power consumption and displayed fuel consumption. The displayed power consumption is determined using a method such as... Figure 1The energy consumption calculation method shown indicates the current electricity consumption Ec, while the displayed fuel consumption is calculated using the method described above. Figure 1 The energy consumption calculation method shown calculates the current fuel consumption Fc. After the controller calculates the current electricity consumption Ec and the current fuel consumption Fc, it sends them to the central control unit for display to the user. The central control unit updates the displayed electricity and fuel consumption on the central control screen every preset distance the vehicle travels. As an example, the preset distance is 100m. In addition, a reset button is also provided on the central control screen, allowing the user to reset the current cycle.

[0039] like Figure 2 As shown, the energy consumption calculation method for pure electric vehicles in this embodiment of the invention includes the following steps:

[0040] S21. Obtain the vehicle's current driving time t, driving distance S, and power consumption E1 within the current cycle. Here, the cycle is either a driving cycle, a subtotal cycle, or a long-term driving cycle, i.e., the vehicle's current driving cycle, the vehicle's current subtotal cycle, or the vehicle's current long-term driving cycle.

[0041] In some embodiments, the controller obtains the mileage S within the current cycle using an odometer composed of a high-precision Hall sensor or an optical encoder. Since it is a pure electric vehicle, its mileage S is also the pure electric driving distance.

[0042] In some embodiments, the controller obtains the voltage and current of the power battery from the battery management system and integrates them to obtain the power consumption E1 in the current cycle of the vehicle. Alternatively, the controller can also integrate the power of the drive motor (obtained from the drive system) to obtain the power consumption E1 in the current cycle of the vehicle.

[0043] S22. Based on the vehicle's current cycle driving time t (unit: hours), driving distance S (unit: km), and preset weight decay time factor α and preset weight decay distance factor β, the baseline weight W0 and the actual data weight W1 are calculated using the preset dynamic weight calculation formula.

[0044] In some embodiments, the preset dynamic weight calculation formula is: Where 0 < α < 1, 0 < β < 1. α corresponds to the decay in the time dimension, and β corresponds to the decay in the mileage dimension. As the driving time t increases and the driving mileage S increases, the baseline weight W0 decays exponentially, while the actual data weight W1 gradually increases. The specific values ​​of α and β are obtained through calibration methods based on the target vehicle's announced energy consumption and real-vehicle verification.

[0045] S23. Based on the vehicle's current driving distance S (unit: km), power consumption E1 (unit: kWh), baseline weight W0, real data weight W1, preset baseline driving distance D0, and preset baseline power consumption E0, the current power consumption Ec is calculated using the preset power consumption calculation formula.

[0046] In some embodiments, the preset power consumption calculation formula is: The unit for energy consumption Ec is kWh / 100km. The specific values ​​of D0, E0, and F0 are obtained through calibration methods based on the announced energy consumption of the target vehicle type (e.g., sedan, SUV, etc.) and real-vehicle verification.

[0047] The energy consumption display method for pure electric vehicles in this embodiment of the invention is as follows: Every time the vehicle travels a preset distance, the control display module (e.g., the central control screen) updates the displayed energy consumption. The displayed energy consumption is determined using a method such as... Figure 2 The energy consumption calculation method shown indicates the current energy consumption Ec. After calculating the current energy consumption Ec, the controller sends it to the central control unit for display to the user. The central control unit updates the displayed energy consumption on the central control screen every preset distance the vehicle travels. As an example, the preset distance is 100m. Additionally, a reset button is provided on the central control screen, allowing the user to reset the current cycle.

[0048] In addition, this embodiment of the invention also provides an energy consumption calculation system, which includes a controller configured to execute the above-described energy consumption calculation method. As an example, the controller uses an ARM Cortex-A53 or higher performance processor with a clock speed of not less than 1.2 GHz, at least four cores, and is equipped with 2GB or more of DDR4 memory and 16GB or more of eMMC storage to meet real-time computing and data storage requirements.

[0049] In addition, embodiments of the present invention also provide a vehicle that includes the above-described energy consumption calculation system.

[0050] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. An energy consumption calculation method applied to range-extended vehicles, characterized in that, include: Obtain the vehicle's driving time t, driving distance S, and pure electric driving distance D within the current cycle. EV Fuel-powered driving distance D EVE Power consumption E1, fuel consumption F1; wherein, the cycle is a driving cycle, a subtotal cycle, or a long-term driving cycle; Based on the driving time t, driving mileage S, preset weight decay time factor α, and preset weight decay mileage factor β, the baseline weight W0 and the actual data weight W1 are calculated using a preset dynamic weight calculation formula; wherein, the preset dynamic weight calculation formula is: , 0 < α < 1, 0 < β < 1; Based on the pure electric driving distance D EV Fuel-powered driving distance D EVE The current energy consumption Ec and current fuel consumption Fc are calculated using preset energy consumption calculation formulas and fuel consumption calculation formulas, based on the following parameters: energy consumption E1, fuel consumption F1, baseline weight W0, actual data weight W1, and preset baseline driving distance D0, baseline energy consumption E0, and baseline fuel consumption F0. The preset energy consumption calculation formula is as follows: The preset fuel consumption calculation formula is as follows: .

2. An energy consumption display method, applied to range-extended vehicles, characterized in that, The method is as follows: every time the vehicle travels a preset distance, the control display module updates the displayed power consumption and displayed fuel consumption; wherein, the displayed power consumption is the current power consumption Ec calculated using the energy consumption calculation method as described in claim 1, and the displayed fuel consumption is the current fuel consumption Fc calculated using the energy consumption calculation method as described in claim 1.

3. An energy consumption calculation method, applied to pure electric vehicles, characterized in that, include: Obtain the vehicle's driving time t, driving distance S, and power consumption E1 within the current cycle; wherein, the cycle is a driving cycle, a subtotal cycle, or a long-term driving cycle; Based on the driving time t, driving mileage S, preset weight decay time factor α, and preset weight decay mileage factor β, the baseline weight W0 and the actual data weight W1 are calculated using a preset dynamic weight calculation formula; wherein, the preset dynamic weight calculation formula is: , 0 < α < 1, 0 < β < 1; Based on the driving mileage S, power consumption E1, baseline weight W0, actual data weight W1, and preset baseline driving distance D0 and baseline power consumption E0, the current power consumption Ec is calculated using a preset power consumption calculation formula; wherein, the preset power consumption calculation formula is: .

4. An energy consumption display method, applied to pure electric vehicles, characterized in that, The method is as follows: every time the vehicle travels a preset distance, the control display module updates the displayed power consumption; wherein, the displayed power consumption is the current power consumption Ec calculated using the energy consumption calculation method as described in claim 3.

5. An energy consumption calculation system, comprising a controller, characterized in that: The controller is configured to perform the energy consumption calculation method as described in claim 1 or 3.

6. A vehicle, characterized in that: Including the energy consumption calculation system as described in claim 5.

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