Pure electric truck energy consumption calculation and display method

Abstract

The invention relates to a method for calculating and displaying energy consumption of a pure electric truck, and solves the problem that the energy consumption cannot be calculated or jumps when a vehicle exchanges electricity at present. After a vehicle is powered on, the display screen (1) obtains the mileage and the current average power consumption of the vehicle from the instrument (3) through the CAN bus (2), an interval calculation mode is adopted, every time the vehicle travels for 1 kilometer as a calculation interval, and after the vehicle travels for 1 kilometer, the display screen (1) obtains the accumulated discharge amount and the accumulated kinetic energy feedback charge amount from the battery management system (4) through the CAN bus (2); the average power consumption data with the historical average power consumption of about 50km is displayed in a curve mode, the current average power consumption data calculated in real time is displayed in a straight line, the average power consumption is calculated by two groups of power consumption data received by the display screen every time when the display screen is powered on, and the average power consumption is calculated with the data before power failure. And displaying a calculation result on an energy consumption query page of the vehicle-mounted display screen. The driving behavior can be standardized, and the energy utilization rate can be improved.

Description

Technical Field

[0001] The invention relates to a method for calculating and displaying energy consumption of a pure electric truck, and belongs to the technical field of pure electric trucks. Background Art

[0002] With the continuous deepening of the country's "dual carbon" strategy, the green transformation of the transportation industry has become a general trend. Pure electric heavy trucks have been put into use in large quantities in domestic steel mills, logistics parks, and urban slag industries. Due to the characteristics of high energy consumption and large power battery capacity of pure electric heavy trucks, in order to improve transportation efficiency, battery replacement has become the main way for pure electric heavy trucks to obtain energy in addition to charging. It only takes ten minutes to complete the power battery replacement and put it into the next transportation. How to accurately calculate the vehicle's historical energy consumption and current energy consumption in the case of battery replacement, provide intuitive energy consumption display for drivers and fleets, standardize driving behavior, and monitor vehicle operation status are key technical points.

[0003] At present, domestic heavy-duty truck manufacturers only calculate the charging energy consumption when calculating the vehicle's energy consumption. When the vehicle replaces its battery, there are situations where the energy consumption cannot be calculated or the energy consumption jumps. Summary of the invention

[0004] The purpose of the present invention is to provide a method for calculating the energy consumption of a pure electric truck. Regardless of whether the vehicle is charged or replaced, the historical energy consumption and real-time energy consumption of the vehicle can be accurately calculated and displayed intuitively on the on-board display screen, providing effective support for the driver to standardize driving behavior and master the vehicle's energy consumption status.

[0005] The present invention is achieved by the following technical solutions:

[0006] A method for calculating and displaying energy consumption of a pure electric truck, comprising an on-board display screen (1), a CAN bus (2), an instrument (3) and a battery management system (4);

[0007] After the vehicle is powered on, the display screen (1) obtains the current vehicle mileage from the instrument (3) via the CAN bus (2). Because the vehicle has a battery replacement situation, the current average power consumption is calculated in intervals, with each kilometer of travel being taken as a calculation interval. After each kilometer of travel, the display screen (1) obtains the cumulative discharge amount and the cumulative kinetic energy feedback charging amount from the battery management system (4) via the CAN bus (2). The average power consumption calculation formula is: average power consumption = (cumulative discharge amount at the end of the interval - cumulative discharge amount at the beginning of the interval) - (cumulative kinetic energy feedback charging amount at the end of the interval - cumulative kinetic energy feedback charging amount at the beginning of the interval);

[0008] The historical average power consumption is the average power consumption data of nearly 50km, which is displayed in the form of a curve. The current average power consumption shows the average power consumption data calculated in real time, which is displayed in a straight line. Each time the display screen is powered on, it takes the two sets of power consumption data received at power-on to calculate the average power consumption, and calculates it with the data before power failure. After the calculation is completed, the calculation result will be displayed on the energy consumption query page of the vehicle display screen.

[0009] The present invention combines the battery replacement characteristics of pure electric heavy trucks to intuitively display the real-time energy consumption and historical energy consumption of pure electric heavy trucks, avoiding energy consumption calculation value jumps caused by battery replacement. The driver can intuitively view the current vehicle energy consumption status and compare it with the historical energy consumption, understand the energy consumption information and battery health status of new energy vehicles, which helps to standardize driving behavior and improve energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is the hardware structure diagram of energy consumption calculation of the present invention;

[0011] Figure 2 It is the energy consumption calculation display interface of the present invention. DETAILED DESCRIPTION

[0012] like Figure 1 , 2 As shown, the present invention is a method for calculating and displaying energy consumption of a pure electric truck, wherein the main parts include an on-board display screen (1), a CAN bus (2), an instrument (3), and a battery management system (4).

[0013] The solution is implemented by the following process logic:

[0014] After the vehicle is powered on, the display screen (1) obtains the current vehicle mileage from the instrument (3) via the CAN bus (2). Because the vehicle has a battery replacement, the current average power consumption is calculated in intervals, with each kilometer of travel being a calculation interval. After the vehicle travels each kilometer, the display screen (1) obtains the cumulative discharge amount and the cumulative kinetic energy feedback charging amount from the battery management system (4) via the CAN bus (2). The average power consumption calculation formula is: average power consumption = (cumulative discharge amount at the end of the interval - cumulative discharge amount at the beginning of the interval) - (cumulative kinetic energy feedback charging amount at the end of the interval - cumulative kinetic energy feedback charging amount at the beginning of the interval), unit (kW.h / km).

[0015] The historical average power consumption is the average power consumption data of nearly 50km, which is displayed in the form of a curve. The current average power consumption shows the average power consumption data calculated in real time, which is displayed in a straight line. Each time the display screen is powered on, it takes the two sets of power consumption data received at power on to calculate the average power consumption, and calculates it with the data before power off. After the calculation is completed, the calculation result will be displayed on the energy consumption query page of the on-board display screen, which is convenient for the driver to view the current energy consumption and historical energy consumption, understand the vehicle energy consumption data, standardize driving behavior and vehicle use, and improve energy efficiency.

[0016] The present invention has the following characteristics:

[0017] 1. The average power consumption is calculated using the mileage interval method to avoid the energy consumption curve being inconsistent with the actual vehicle due to the jump in the cumulative discharge amount of battery replacement;

[0018] 2. Integrate and calculate multi-dimensional information such as mileage, cumulative discharge, cumulative kinetic energy feedback charging, and display them on the vehicle display screen.

Claims

1. A method for calculating and displaying energy consumption of a pure electric truck, characterized by: Including vehicle Display screen (1), CAN bus (2), instrument (3) and battery management system (4); After the vehicle is powered on, the display screen (1) obtains the current vehicle mileage from the instrument (3) via the CAN bus (2). Because the vehicle has a battery replacement situation, the current average power consumption is calculated in intervals, with each kilometer of travel being taken as a calculation interval. After each kilometer of travel, the display screen (1) obtains the cumulative discharge amount and the cumulative kinetic energy feedback charging amount from the battery management system (4) via the CAN bus (2). The average power consumption calculation formula is: average power consumption = (cumulative discharge amount at the end of the interval - cumulative discharge amount at the beginning of the interval) - (cumulative kinetic energy feedback charging amount at the end of the interval - cumulative kinetic energy feedback charging amount at the beginning of the interval); The historical average power consumption is the average power consumption data of nearly 50km, which is displayed in the form of a curve. The current average power consumption shows the average power consumption data calculated in real time, which is displayed in a straight line. Each time the display screen is powered on, it takes the two sets of power consumption data received at power-on to calculate the average power consumption, and calculates it with the data before power failure. After the calculation is completed, the calculation result will be displayed on the energy consumption query page of the vehicle display screen.

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