Method and system for determining endurance mileage of fuel cell passenger car

Abstract

The invention relates to the technical field of vehicle control, in particular to a method and system for determining the endurance mileage of a fuel cell passenger car, and the method comprises the steps: obtaining the driving mileage and the total power consumption of the whole car through obtaining vehicle speed information, battery information and hydrogen system information, and determining the average power consumption through the ratio of the driving mileage and the total power consumption; the hydrogen consumption mass and the corresponding hydrogen system output electric quantity are obtained based on an ideal gas state equation by obtaining the pressure and temperature of hydrogen, and the hydrogen-electricity conversion coefficient is determined according to the ratio of the hydrogen consumption mass and the corresponding hydrogen system output electric quantity; the current information of each part of the vehicle is converted into corresponding power consumption information, the total conversion electric quantity of the hydrogen system is obtained by combining the battery electric quantity information, and the hydrogen-electricity conversion efficiency is obtained by comparing the total conversion electric quantity with the output electric quantity of the hydrogen system to adjust the hydrogen-electricity conversion coefficient; the residual hydrogen at the current moment is converted into the charging amount, and the endurance mileage is obtained by combining the obtained charging amount with the residual electric quantity of the battery and the average power consumption in the current operation period.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a method and system for determining the cruising range of a fuel cell bus. Background Art

[0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art.

[0003] Fuel cell buses are new energy buses that use hydrogen as fuel and generate electricity through electrochemical reactions. They have the advantages of zero emissions, high efficiency, and low noise. Such buses are often equipped with calculation tools that can estimate the distance that the remaining fuel or power can support the bus to travel. At present, most calculation tools convert hydrogen energy into electricity by setting a fixed conversion coefficient, and then estimate the cruising range based on the average power consumption experience. Since the working efficiency of fuel cells is greatly affected by changes in the operating environment, and different driving conditions will also result in different average power consumption of the vehicle, therefore, in different driving environments or driving conditions, using a fixed hydrogen-to-electricity conversion coefficient and average power consumption experience to calculate the cruising range may result in a large difference between the estimated value and the actual drivable mileage, which will affect the driver's understanding of the actual situation of the vehicle and make it easy to make wrong judgments. Summary of the invention

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the present invention provides a method and system for determining the cruising range of a fuel cell bus, which calculates the average power consumption according to the actual operating status of the vehicle, and dynamically adjusts the hydrogen-to-electricity conversion coefficient based on the output of the hydrogen system, the remaining hydrogen, the battery power, and the total power consumption of the vehicle, thereby estimating the cruising range in real time and ensuring that the cruising range of the fuel cell bus can be accurately predicted and calculated under different driving environments or different driving conditions.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A first aspect of the present invention provides a method for determining the cruising range of a fuel cell bus, comprising the following steps:

[0007] Obtain vehicle speed information, battery information, and vehicle speed signal, voltage signal, and current signal in hydrogen system information to obtain the mileage and total vehicle power consumption in this operation cycle, and use the ratio of the two to determine the average power consumption in this operation cycle;

[0008] Obtain the pressure and temperature of hydrogen in the hydrogen system, and based on the ideal gas state equation, obtain the hydrogen consumption mass and the corresponding hydrogen system output power in the current operation cycle, and use the ratio of the two to determine the hydrogen-to-electricity conversion coefficient;

[0009] Obtain the current information of each vehicle component, convert it into the corresponding power consumption information, and combine it with the battery power information to obtain the total converted power of the hydrogen system. By comparing it with the output power of the hydrogen system obtained, the hydrogen-electric conversion efficiency is obtained. The product between the obtained hydrogen-electric conversion efficiency and the hydrogen-electric conversion coefficient is the adjusted hydrogen-electric conversion coefficient;

[0010] According to the adjusted hydrogen-electric conversion coefficient, convert the remaining hydrogen at the current moment into the charging amount. Using the obtained charging amount, combine it with the remaining battery power and the average power consumption during this operation cycle to obtain the cruising range.

[0011] Further, this operation cycle is specifically: by monitoring the vehicle operation status, if the previous moment is in a low-voltage state and the current moment is in a high-voltage state, it is considered that the power-on is completed and timing starts. This period of time is an operation cycle.

[0012] Further, the total vehicle power consumption is specifically: Obtain the battery current I b , the battery voltage U b , the output current I of the hydrogen system q , and the output voltage U of the hydrogen system q . Set the battery current discharge as positive and the charge as negative, and the output current of the hydrogen system as positive. The total vehicle power consumption is obtained through integral processing.

[0013] Further, obtain the mass of hydrogen consumed during the current operation cycle, specifically: Obtain the hydrogen pressure and hydrogen temperature at the initial moment of vehicle power-on, as well as the current hydrogen pressure and current hydrogen temperature during vehicle operation. Based on the ideal gas state equation, obtain the hydrogen mass at the initial moment and the hydrogen mass at the current moment respectively. The difference between the two is the mass of hydrogen consumed during the current operation cycle.

[0014] Further, the output power of the hydrogen system is specifically: Integrate the product of the output current I of the hydrogen system q and the output voltage U of the hydrogen system q from the initial moment of power-on to obtain the output power E of the hydrogen system during the current operation cycle q .

[0015] Further, obtain the total converted power of the hydrogen system, specifically:

[0016] If the initial battery power is less than the current battery power value, that is, Soc1 < Soc2, then the total battery power consumption E bsum =(Soc2 - Soc1)*E b100 , where E b100 is the total energy when the battery is fully charged. Then the total converted power E of the hydrogen system sum is: the sum of the total power consumption corresponding to each vehicle component and the total battery power consumption E bsum ;

[0017] If the initial battery power is greater than or equal to the current battery power value, that is, Soc1≥Soc2, then the total battery power consumption E bsum =(Soc1-Soc2)*E b100 , then the total conversion amount of hydrogen system is E sum = Total power consumption of each vehicle component and total battery power consumption E bsum difference.

[0018] Furthermore, the product of the obtained hydrogen-to-electricity conversion efficiency and the hydrogen-to-electricity conversion coefficient is the adjusted hydrogen-to-electricity conversion coefficient, as shown in the following formula:

[0019]

[0020] Among them, k is the adjusted hydrogen-to-electricity conversion coefficient, k1 is the hydrogen-to-electricity conversion coefficient before adjustment, x is the hydrogen-to-electricity conversion efficiency, E sum is the total conversion amount of hydrogen system, E q The output power of the hydrogen system, the maximum value of x is not more than 1, and the minimum value is not less than 0.9.

[0021] Furthermore, the remaining hydrogen at the current moment is converted into the charge capacity, specifically: the product of the adjusted hydrogen-to-electricity conversion coefficient and the hydrogen mass at the previous moment is the charge capacity E qc .

[0022] Furthermore, the obtained charging capacity is combined with the remaining battery power and the average power consumption during this operation cycle to obtain the cruising range, as shown in the following formula:

[0023]

[0024] Among them, E ave is the average power consumption of the vehicle, k is the adjusted hydrogen-to-electricity conversion coefficient, m2 is the hydrogen mass at the current moment, Soc2 is the current battery power, E b100 Total energy when the battery is fully charged.

[0025] A second aspect of the present invention provides a system for determining the cruising range of a fuel cell bus, comprising:

[0026] The average power consumption calculation module is configured to: obtain the vehicle speed information, the battery information, and the vehicle speed signal, the voltage signal, and the current signal in the hydrogen system information, obtain the mileage and the total power consumption of the vehicle in this operation cycle, and use the ratio of the two to determine the average power consumption in this operation cycle;

[0027] The hydrogen-electricity energy conversion calculation module is configured to: obtain the pressure and temperature of hydrogen in the hydrogen system, obtain the hydrogen consumption mass and the corresponding hydrogen system output power in the current operation cycle based on the ideal gas state equation, and determine the hydrogen-electricity conversion coefficient using the ratio of the two;

[0028] The hydrogen-to-electricity conversion coefficient adjustment module is configured to: obtain current information of various vehicle components, convert it into corresponding power consumption information, and obtain the total conversion power of the hydrogen system by combining the battery power information, and obtain the hydrogen-to-electricity conversion efficiency by comparing it with the obtained hydrogen system output power. The product of the obtained hydrogen-to-electricity conversion efficiency and the hydrogen-to-electricity conversion coefficient is the adjusted hydrogen-to-electricity conversion coefficient;

[0029] The cruising range calculation module is configured to: convert the remaining hydrogen at the current moment into the charge amount according to the adjusted hydrogen-to-electricity conversion coefficient, and use the obtained charge amount in combination with the remaining battery power and the average power consumption in this operating cycle to obtain the cruising range.

[0030] Compared with the prior art, one or more of the above technical solutions have the following beneficial effects:

[0031] The average power consumption of each component in the actual operating state of the vehicle is statistically analyzed, and the hydrogen-to-electricity conversion efficiency is obtained by combining parameters such as the hydrogen system output, the remaining hydrogen and the remaining battery power. The hydrogen-to-electricity conversion coefficient is dynamically adjusted using the hydrogen-to-electricity conversion efficiency, so as to estimate the driving range in real time, ensuring that the driving range of the fuel cell bus can be predicted and calculated as accurately as possible under different driving environments or different driving conditions. The problem of large deviation between the estimated driving range and the actual drivable mileage of the fuel cell bus under different driving environments or different driving conditions is solved, which improves the driver's control over the fuel cell bus and improves driving safety at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0033] Figure 1 It is a schematic diagram of a process for determining the cruising range of a fuel cell bus provided by one or more embodiments of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0036] It should be noted that the terms herein are only intended to describe specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0037] Fuel cell buses are buses that use fuel cells to chemically react with fuel (such as hydrogen) and oxidants (such as oxygen in the air) to generate electricity and heat. The electricity drives the motor to provide power for the bus, while the heat is discharged through the cooling system.

[0038] As introduced in the background technology, most current calculation tools convert hydrogen energy into electrical energy by setting a fixed conversion coefficient, and then estimate the range based on the average power consumption experience. The range obtained by this calculation method has a large error.

[0039] Therefore, the following embodiment provides a method and system for determining the cruising range of a fuel cell bus, which calculates the average power consumption according to the actual operating status of the vehicle, and dynamically adjusts the hydrogen-to-electricity conversion coefficient based on the output of the hydrogen system, the remaining hydrogen, the battery power, and the total power consumption of the vehicle, thereby estimating the cruising range in real time and ensuring that the cruising range of the fuel cell bus can be accurately predicted and calculated under different driving environments or different driving conditions.

[0040] Embodiment 1:

[0041] like Figure 1 As shown in the figure, the vehicle controller calculates the average power consumption according to the actual operating status of the vehicle, and then dynamically adjusts the hydrogen-to-electricity conversion coefficient based on the output of the hydrogen system, the remaining hydrogen, the battery power, and the total power consumption of the vehicle, so as to accurately estimate the vehicle's cruising range. The specific steps are as follows:

[0042] (1) Calculation of average power consumption of the vehicle

[0043] The vehicle controller monitors the vehicle's operating status. If the previous moment was in a low-voltage state and the current moment is in a high-voltage state, it is considered that the power-on is complete and the timing begins. This period of time is determined as an operating cycle.

[0044] The vehicle speed, battery and hydrogen system information are received in real time through the CAN bus, and the mileage and total power consumption of the vehicle are calculated using signals such as vehicle speed, voltage and current to obtain the average power consumption during this operating cycle.

[0045] The vehicle controller integrates the vehicle speed signal v to obtain the mileage s in this operation cycle, as shown in the following formula:

[0046] s = ∫vdt;

[0047] Among them, v is the vehicle speed signal, and s is the mileage in this operation cycle.

[0048] The vehicle controller obtains the battery current I b , battery voltage U b , hydrogen system output current I q , and the hydrogen system output voltage U q , the battery current is positive when discharging, negative when charging, and positive when outputting the hydrogen system. b , U b , I q , and U q Calculate the total power E1 during this operation cycle as shown in the following formula:

[0049] E1=∫I b *U b dt+∫I q *U q dt;

[0050] Among them, I b is the battery current, U b is the battery voltage, I q is the output current of the hydrogen system, expressed as U q Output voltage for the hydrogen system.

[0051] The average power consumption E1 in this driving cycle is obtained by using the ratio of the total power E1 in this driving cycle to the driving mileage s. ave1 , as shown below:

[0052]

[0053] If the mileage during this power-on period is less than 3 km, that is, s<3, it is determined that the sample mileage is small, which may lead to a large deviation in the calculated average power consumption value. Therefore, it is necessary to set the initial average power consumption value E s As the current average power consumption, E s Take the empirical value of power consumption for this vehicle type.

[0054] In summary, the average power consumption of the vehicle is E ave , as shown below:

[0055]

[0056] (2) Hydrogen-electricity energy conversion

[0057] From the ideal gas state equation The calculation formula for the hydrogen mass m is:

[0058]

[0059] Among them, P is the gas pressure, V is the hydrogen storage volume, M is the molar mass of hydrogen, z is the gas compressibility factor, R is the universal gas constant, and T is the gas temperature.

[0060] At the initial moment of vehicle power-on, the vehicle controller uses the pressure sensor and temperature sensor to obtain the gas pressure P1 and gas temperature T1 at this time, and then determines the hydrogen mass m1 at the initial moment according to the ideal gas state equation, as shown in the following formula:

[0061]

[0062] During vehicle operation, the mass of hydrogen at the current moment is determined to be m2 based on the gas pressure P2 and gas temperature T2 obtained in real time by the vehicle controller, as shown in the following formula:

[0063]

[0064] The mass of hydrogen consumed in the current operation cycle is: Δm = m1-m2, as shown in the following formula:

[0065]

[0066] The vehicle controller outputs current I to the hydrogen system from the initial power-on moment q With hydrogen system output voltage U q Integrate the product of to obtain the output power E of the hydrogen system in the current operation cycle q , as shown below:

[0067] E q =∫I q *U q dt.

[0068] Utilize the hydrogen system output power E in the current operation cycle q The ratio of the mass of hydrogen consumed Δm to obtain the hydrogen-to-electricity conversion coefficient k1 is shown in the following formula:

[0069]

[0070] In summary, the calculation formula for hydrogen-electricity conversion coefficient is:

[0071]

[0072] (3) Dynamic adjustment of hydrogen-to-electricity conversion coefficient

[0073] The vehicle controller obtains the motor current I through the CAN bus m 、Air conditioning current I t , Oil pump current I y , air pump current I p, DCDC current I d (The DCDC current refers to the current of the DCDC device, which is installed on the passenger car and is used to convert the electrical energy of the high-voltage DC battery into electrical energy suitable for low-voltage DC electrical appliances) and the battery state of charge Soc, and the total converted electrical energy E of the hydrogen system is calculated comprehensively sum , and finally, by comparing with the output electrical energy E of the hydrogen system calculated by the current-voltage integration q , the hydrogen-electric conversion efficiency x is obtained, and then the hydrogen-electric conversion coefficient k is dynamically adjusted. The specific steps are as follows:

[0074] First, at the initial power-on moment, the vehicle controller reads the battery state of charge, denoted as the initial Soc1, and the current battery state of charge is denoted as Soc2. Then, the product of the motor current I m , air conditioner current I t , oil pump current I y , air pump current I p , DCDC current I d and the battery voltage U b is integrated to obtain the total power consumption E of the motor m , the total power consumption E of the air conditioner t , the total power consumption E of the oil pump y , the total power consumption E of the air pump p , the total power consumption E of the DCDC d . The calculation formula is as follows:

[0075] E m = ∫I m * U b dt; E t = ∫I t * U b dt; E y = ∫I y * U b dt; E p = ∫I p * U b dt;

[0076] E d = ∫I d * U b dt.

[0077] Secondly, calculate the total converted electrical energy E of the hydrogen system according to the power consumption of each component sum , specifically:

[0078] If the initial battery state of charge is less than the current battery state of charge value, that is, Soc1 < Soc2, then the total battery power consumption E bsum = (Soc2 - Soc1) * E b100 , where E b100is the total energy when the battery is fully charged, then the total conversion amount of the hydrogen system is E sum =E m +E t +E y +E p +E d +E bsum ;

[0079] If the initial battery power is greater than or equal to the current battery power value, that is, Soc1≥Soc2, then the total battery power consumption E bsum =(Soc1-Soc2)*E b100 , then the total conversion amount of hydrogen system is E sum For: E sum =E m +E t +E y +E p +E d -E bsum .

[0080] In summary, the total conversion power calculation formula of the hydrogen system is:

[0081]

[0082] The total conversion power E of the hydrogen system calculated using the power consumption of each component of the vehicle sum Divide by the hydrogen system output power E obtained by integral calculation q , and the hydrogen-to-electricity conversion efficiency x is obtained as shown in the following formula:

[0083]

[0084] At the same time, in order to avoid too large differences in the calculated hydrogen-to-electricity conversion efficiency, the maximum value of x is not more than 1, and the minimum value is not less than 0.9, that is,

[0085] Calculate the final hydrogen-to-electricity conversion coefficient k=k1*x.

[0086] (4) Calculation of driving range

[0087] The vehicle controller converts the remaining hydrogen at the current moment into the charging amount E qc , as shown below: qc =k*m2, where k is the calculated hydrogen system conversion coefficient and m2 is the hydrogen mass at the current moment.

[0088] Calculate the remaining battery power E at the current moment bs , as shown in the following formula: bs =Soc2*E b100 , where Soc2 is the current battery power, E b100 Total energy when the battery is fully charged;

[0089] The vehicle's cruising range S is the remaining hydrogen converted charging amount E qc The remaining battery charge E bs The accumulated sum is divided by the vehicle's average power consumption E ave In summary, the vehicle's cruising range S is as follows:

[0090]

[0091] The above process calculates the average power consumption according to the power consumption of each component in the actual operating state of the vehicle, and dynamically adjusts the hydrogen-to-electricity conversion coefficient based on the output of the hydrogen system, the remaining hydrogen and the remaining battery power, so as to estimate the driving range in real time, ensuring that the driving range of the fuel cell bus can be accurately predicted and calculated under different driving environments or different driving conditions. It solves the problem that the estimated driving range of the fuel cell bus in different driving environments or different driving conditions has a large deviation from the actual drivable mileage value, improves the driver's control over the actual situation of the fuel cell bus, and at the same time improves driving safety.

[0092] Embodiment 2:

[0093] A system for determining the cruising range of a fuel cell bus, comprising:

[0094] The average power consumption calculation module is configured to: obtain the vehicle speed information, the battery information, and the vehicle speed signal, the voltage signal, and the current signal in the hydrogen system information, obtain the mileage and the total power consumption of the vehicle in this operation cycle, and use the ratio of the two to determine the average power consumption in this operation cycle;

[0095] The hydrogen-electricity energy conversion calculation module is configured to: obtain the pressure and temperature of hydrogen in the hydrogen system, obtain the hydrogen consumption mass and the corresponding hydrogen system output power in the current operation cycle based on the ideal gas state equation, and determine the hydrogen-electricity conversion coefficient using the ratio of the two;

[0096] The hydrogen-to-electricity conversion coefficient adjustment module is configured to: obtain current information of various vehicle components, convert it into corresponding power consumption information, and obtain the total conversion power of the hydrogen system by combining the battery power information, and obtain the hydrogen-to-electricity conversion efficiency by comparing it with the obtained hydrogen system output power. The product of the obtained hydrogen-to-electricity conversion efficiency and the hydrogen-to-electricity conversion coefficient is the adjusted hydrogen-to-electricity conversion coefficient;

[0097] The cruising range calculation module is configured to: convert the remaining hydrogen at the current moment into the charge amount according to the adjusted hydrogen-to-electricity conversion coefficient, and use the obtained charge amount in combination with the remaining battery power and the average power consumption in this operating cycle to obtain the cruising range.

[0098] The average power consumption of each component in the actual operating state of the vehicle is calculated, and the hydrogen-to-electricity conversion coefficient is dynamically adjusted based on the hydrogen system output, the remaining hydrogen and the remaining battery power, so as to estimate the driving range in real time, ensuring that the driving range of the fuel cell bus can be accurately predicted and calculated under different driving environments or different driving conditions. This solves the problem of large deviation between the estimated range and the actual drivable mileage of the fuel cell bus under different driving environments or different driving conditions, improves the driver's control over the actual situation of the fuel cell bus, and at the same time improves driving safety.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for determining the cruising range of a fuel cell bus, characterized in that: The following steps are involved: Obtain vehicle speed information, battery information, and vehicle speed signal, voltage signal, and current signal in hydrogen system information to obtain the mileage and total vehicle power consumption in this operation cycle, and use the ratio of the two to determine the average power consumption in this operation cycle; Obtain the pressure and temperature of hydrogen in the hydrogen system, and based on the ideal gas state equation, obtain the hydrogen consumption mass and the corresponding hydrogen system output power in the current operation cycle, and use the ratio of the two to determine the hydrogen-to-electricity conversion coefficient; The current information of each component of the vehicle is obtained, converted into corresponding power consumption information, and combined with the battery power information to obtain the total conversion power of the hydrogen system. By comparing it with the obtained output power of the hydrogen system, the hydrogen-to-electricity conversion efficiency is obtained. The product of the obtained hydrogen-to-electricity conversion efficiency and the hydrogen-to-electricity conversion coefficient is the adjusted hydrogen-to-electricity conversion coefficient; According to the adjusted hydrogen-to-electricity conversion coefficient, the remaining hydrogen at the current moment is converted into charging capacity, and the obtained charging capacity is combined with the remaining battery power and the average power consumption during this operating cycle to obtain the cruising range.

2. A method for determining the cruising range of a fuel cell bus as claimed in claim 1, characterized in that: This operation cycle is specifically as follows: by monitoring the vehicle's operating status, if the vehicle was in a low-voltage state at the previous moment and is in a high-voltage state at the current moment, it is considered that the power-on is completed and the timing starts. This period of time is an operation cycle.

3. A method for determining the cruising range of a fuel cell bus as claimed in claim 1, characterized in that: The total power consumption of the vehicle is as follows: Get the battery current I b , battery voltage U b , hydrogen system output current I q , and the hydrogen system output voltage U q , setting the battery current discharge to positive, charging to negative, and the hydrogen system output current to positive, the total power consumption of the vehicle is obtained through integration processing.

4. A method for determining the cruising range of a fuel cell bus as claimed in claim 1, characterized in that: The mass of hydrogen consumed in the current operating cycle is obtained, specifically: the hydrogen pressure and hydrogen temperature at the initial moment when the vehicle is powered on, and the current hydrogen pressure and current hydrogen temperature during vehicle operation are obtained, and based on the ideal gas state equation, the hydrogen mass at the initial moment and the hydrogen mass at the current moment are obtained respectively, and the difference between the two is the mass of hydrogen consumed in the current operating cycle.

5. A method for determining the cruising range of a fuel cell bus as claimed in claim 1, characterized in that: The output power of the hydrogen system is as follows: the output current I of the hydrogen system from the initial power-on moment q With hydrogen system output voltage U q Integrate the product of to obtain the output power E of the hydrogen system in the current operation cycle q .

6. A method for determining the cruising range of a fuel cell bus as claimed in claim 1, characterized in that: The total conversion power of the hydrogen system is obtained, specifically: If the initial battery power is less than the current battery power value, i.e., Soc1 < Soc2, then the total battery power consumption E bsum =(Soc2 - Soc1)*E b100 , where E b100 is the total energy when the battery is fully charged. Then the total converted power E sum of the hydrogen system is: the sum of the total power consumption corresponding to each vehicle component and the total battery power consumption E bsum . If the initial battery power is greater than or equal to the current battery power value, that is, Soc1≥Soc2, then the total battery power consumption E bsum =(Soc1-Soc2)*E b100 , then the total conversion amount of hydrogen system is E sum = Total power consumption of each vehicle component and total battery power consumption E bsum difference.

7. A method for determining the cruising range of a fuel cell bus as claimed in claim 1, characterized in that: The product of the obtained hydrogen-to-electricity conversion efficiency and the hydrogen-to-electricity conversion coefficient is the adjusted hydrogen-to-electricity conversion coefficient, as shown in the following formula: Among them, k is the adjusted hydrogen-to-electricity conversion coefficient, k1 is the hydrogen-to-electricity conversion coefficient before adjustment, x is the hydrogen-to-electricity conversion efficiency, E sum is the total conversion amount of hydrogen system, E q The output power of the hydrogen system, the maximum value of x is not more than 1, and the minimum value is not less than 0.

9.

8. A method for determining the cruising range of a fuel cell bus as claimed in claim 1, characterized in that: The remaining hydrogen at the current moment is converted into the charge capacity. Specifically, the product of the adjusted hydrogen-to-electricity conversion coefficient and the hydrogen mass at the previous moment is the charge capacity E. qc .

9. A method for determining the cruising range of a fuel cell bus as claimed in claim 1, characterized in that: The obtained charge capacity is combined with the remaining battery capacity and the average power consumption during this operation cycle to obtain the cruising range, as shown in the following formula: Among them, E ave is the average power consumption of the vehicle, k is the adjusted hydrogen-to-electricity conversion coefficient, m2 is the hydrogen mass at the current moment, Soc2 is the current battery power, E b100 Total energy when the battery is fully charged.

10. A system for determining the cruising range of a fuel cell bus, characterized in that: include: The average power consumption calculation module is configured to: obtain the vehicle speed information, the battery information, and the vehicle speed signal, the voltage signal, and the current signal in the hydrogen system information, obtain the mileage and the total power consumption of the vehicle in this operation cycle, and use the ratio of the two to determine the average power consumption in this operation cycle; The hydrogen-electricity energy conversion calculation module is configured to: obtain the pressure and temperature of hydrogen in the hydrogen system, obtain the hydrogen consumption mass and the corresponding hydrogen system output power in the current operation cycle based on the ideal gas state equation, and determine the hydrogen-electricity conversion coefficient using the ratio of the two; The hydrogen-to-electricity conversion coefficient adjustment module is configured to: obtain current information of various vehicle components, convert it into corresponding power consumption information, and obtain the total conversion power of the hydrogen system by combining the battery power information, and obtain the hydrogen-to-electricity conversion efficiency by comparing it with the obtained hydrogen system output power. The product of the obtained hydrogen-to-electricity conversion efficiency and the hydrogen-to-electricity conversion coefficient is the adjusted hydrogen-to-electricity conversion coefficient; The cruising range calculation module is configured to: convert the remaining hydrogen at the current moment into the charge amount according to the adjusted hydrogen-to-electricity conversion coefficient, and use the obtained charge amount in combination with the remaining battery power and the average power consumption in this operating cycle to obtain the cruising range.

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