Management method based on fuel cell vehicle and fuel cell vehicle

Abstract

The invention relates to a management method based on a fuel cell vehicle and the fuel cell vehicle. The method comprises the steps of obtaining fuel cell power, fuel cell efficiency, whole vehicle hydrogen consumption and whole vehicle power consumption of a target fuel cell vehicle in a current operation period; and the whole vehicle hydrogen consumption, the whole vehicle power consumption, the fuel cell power and the fuel cell efficiency in the current operation period and the whole vehicle hydrogen consumption, the whole vehicle power consumption, the fuel cell power and the fuel cell efficiency in the previous operation period are judged respectively, and the whole vehicle operation state in the current operation period is determined according to different judgment results. According to the method, the performance parameters of the fuel cell are analyzed, so that the change condition of the performance of the fuel cell is monitored in real time, and the running state of the whole vehicle is judged and confirmed according to different change conditions.

Description

Technical Field

[0001] The invention relates to a management method based on a fuel cell vehicle and a fuel cell vehicle, belonging to the technical field of fuel cell vehicles. Background Art

[0002] A fuel cell is a device system that converts the chemical energy of a fuel (hydrogen) directly into electrical energy through an electrochemical reaction under the action of a catalyst. During operation, it is susceptible to dry-wet cycles, potential cycles, pressure alternations, high potentials, hydrogen-air interfaces, etc., resulting in the risk of slightly weaker performance, including the decline of parameters such as output power and efficiency. At present, the industry-recognized end-of-life condition for fuel cells is a 20% attenuation of the rated power. If the energy management strategy (which mainly refers to the hysteresis interval control based on the power battery SOC (State of Charge), power following control, and the multi-mode control or ECMS (Equivalent Consumption Minimization Strategy) based on the combined state of the two) of the fuel cell does not always take into account the changes in the performance of the fuel cell system, then under the same power demand, the lower the efficiency, the greater the hydrogen consumption, and the higher the hydrogen consumption of the vehicle, which seriously affects the operating costs of customers.

[0003] To this end, a power system, energy control method and device for a fuel cell vehicle are disclosed in a patent document with authorization announcement number CN111572411B. The method predicts the average power of the fuel cell in the current 10 minutes based on the power demand of the whole vehicle and the charge state of the energy storage device in the past 10 minutes. Then, within the 10-minute control cycle, the VCU (Vehicle Control Unit) controls the fuel cell to operate at the average power of the previous 10 minutes to keep the output power of the fuel cell unchanged, thereby ensuring that the dynamic balance of the power battery SOC is maintained. Although the power of the fuel cell can be predicted based on the power demand of the whole vehicle and the charge state of the energy storage device, the changes in the performance of the fuel cell are still not directly monitored, resulting in an inability to accurately understand the operating status of the whole vehicle, and thus an inability to perform reasonable energy management.

[0004] A vehicle fuel cell operating power control system and method is disclosed in the patent document with application publication number CN111605440A, which proposes a fuel cell power following control system and method based on the SOC range. When the vehicle is in driving state, the fuel cell actively follows the motor power. However, due to the limitations of the current level of fuel cell technology, in actual application, the fuel cell system cannot respond quickly to meet the dynamic needs of the vehicle, and the system rated power cannot meet the peak power requirements of heavy trucks. Summary of the invention

[0005] The purpose of the present invention is to provide a management method based on fuel cell vehicles and a fuel cell vehicle, so as to solve the problem of not considering the performance changes of the fuel cell during the operation of the fuel cell vehicle. By accurately obtaining the performance parameters of the fuel cell of the fuel cell vehicle during the operation cycle, the operation status of the whole vehicle during the current operation cycle can be deeply understood. The method has a wide range of uses and is not limited by the type of vehicle.

[0006] To achieve the above objectives, on the one hand, the solution of the present invention proposes a management method based on a fuel cell vehicle, the method comprising:

[0007] Obtain the fuel cell power, fuel cell efficiency, vehicle hydrogen consumption and vehicle electricity consumption of the target fuel cell vehicle in the current operation cycle;

[0008] When the difference between the whole vehicle hydrogen consumption in the current operation cycle and the whole vehicle hydrogen consumption in the previous operation cycle is greater than the preset hydrogen consumption difference threshold, and the difference between the whole vehicle power consumption in the current operation cycle and the whole vehicle power consumption in the previous operation cycle is less than the preset power consumption difference threshold, determine whether the difference between the fuel cell power in the previous operation cycle and the fuel cell power in the current operation cycle is less than the preset first power difference threshold;

[0009] If so, when the difference between the fuel cell efficiency of the previous operation cycle and the fuel cell efficiency of the current operation cycle is less than a preset efficiency difference threshold, the operation state of the entire vehicle in the current operation cycle is determined as to be optimized;

[0010] If not, when the difference between the fuel cell power of the previous operation cycle and the fuel cell power of the current operation cycle is less than a preset second power difference threshold, the vehicle operation state in the current operation cycle is determined to be to be optimized.

[0011] Furthermore, the fuel cell power of the current operation cycle is calculated by the following method:

[0012] Obtaining the operating data of the fuel cell system of the target fuel cell vehicle in the current operating cycle;

[0013] The operating data of the fuel cell system is normalized and the fuel cell current-power curve in the current cycle is fitted. The common operating current point of the fuel cell is used as the reference current to obtain the reference fuel cell power corresponding to the reference current, and the reference fuel cell power is determined as the fuel cell power of the current operating cycle.

[0014] Further, the fuel cell efficiency of the current operation cycle is calculated by the following method:

[0015] Obtain the instantaneous hydrogen consumption and low-value calorific value of hydrogen of the target fuel cell vehicle in the current operation cycle;

[0016] The fuel cell efficiency is calculated based on the fuel cell power, instantaneous hydrogen consumption and low-value calorific value of hydrogen. The fuel cell efficiency is normalized and fitted to the fuel cell power-efficiency curve in the current cycle. The commonly used operating power point of the fuel cell is used as the reference power to obtain the reference fuel cell efficiency corresponding to the reference power. The reference fuel cell efficiency is determined as the fuel cell efficiency of the current operating cycle.

[0017] Furthermore, the fuel cell efficiency is calculated by the following formula:

[0018] Fuel cell efficiency = fuel cell power ÷ instantaneous hydrogen consumption ÷ hydrogen lower calorific value.

[0019] Furthermore, the vehicle hydrogen consumption is calculated by the following formula:

[0020]

[0021] The vehicle power consumption is calculated by the following formula:

[0022]

[0023] Furthermore, the above-mentioned management method based on fuel cell vehicles also includes:

[0024] During the current operation cycle, confirm the current operating conditions of the target fuel cell vehicle;

[0025] Based on the current operating conditions, the operating data of the target fuel cell vehicle under abnormal operating conditions is eliminated.

[0026] Further, when the difference between the whole vehicle hydrogen consumption in the current operation cycle and the whole vehicle hydrogen consumption in the previous operation cycle is less than a preset hydrogen consumption difference threshold, the whole vehicle operation state in the current operation cycle is determined to be normal;

[0027] When the difference between the vehicle hydrogen consumption in the current operation cycle and the vehicle hydrogen consumption in the previous operation cycle is greater than the preset hydrogen consumption difference threshold, but the difference between the vehicle power consumption in the current operation cycle and the vehicle power consumption in the previous operation cycle is greater than the preset power consumption difference threshold; or,

[0028] When the difference between the whole vehicle hydrogen consumption in the current operation cycle and the whole vehicle hydrogen consumption in the previous operation cycle is greater than the preset hydrogen consumption difference threshold, and the difference between the whole vehicle power consumption in the current operation cycle and the whole vehicle power consumption in the previous operation cycle is less than the preset power consumption difference threshold, and the difference between the fuel cell power in the previous operation cycle and the fuel cell power in the current operation cycle is less than the preset first power difference threshold, and the difference between the fuel cell efficiency in the previous operation cycle and the fuel cell efficiency in the current operation cycle is greater than the preset efficiency difference threshold; or,

[0029] When the difference between the whole vehicle hydrogen consumption in the current operating cycle and the whole vehicle hydrogen consumption in the previous operating cycle is greater than the preset hydrogen consumption difference threshold, and the difference between the whole vehicle power consumption in the current operating cycle and the whole vehicle power consumption in the previous operating cycle is less than the preset power consumption difference threshold, and the difference between the fuel cell power in the previous operating cycle and the fuel cell power in the current operating cycle is greater than the preset first power difference threshold, and the difference between the fuel cell power in the previous operating cycle and the fuel cell power in the current operating cycle is greater than the preset second power difference threshold, the operating status of the whole vehicle in the current operating cycle is determined as pending confirmation.

[0030] Furthermore, when the vehicle operation state is determined to be to be optimized, the optimization is performed in the following manner:

[0031] Obtaining a fuel cell power-efficiency curve, and modifying calibration parameters in an energy management strategy of a current operation cycle based on the fuel cell power-efficiency curve;

[0032] The target fuel cell vehicle executes the energy management strategy with corrected calibration parameters and monitors the hydrogen consumption of the entire vehicle.

[0033] Furthermore, the correction of calibration parameters in the energy management strategy of the current operation cycle based on the fuel cell power-efficiency curve includes:

[0034] According to the fuel cell power-efficiency curve, when the energy management strategy of the current operation cycle only needs to adjust the calibration parameters, the calibration parameters are adjusted according to the following formula:

[0035]

[0036] When the energy management strategy of the current operation cycle does not only adjust the calibration parameters, the calibration parameters are adjusted using an offline simulation method.

[0037] On the other hand, the solution of the present invention also proposes a fuel cell vehicle, which comprises:

[0038] one or more memories and one or more processors;

[0039] The one or more memories are used to store computer programs;

[0040] The one or more processors are connected to the memory and are used to run the computer program to execute the above-mentioned management method based on fuel cell vehicles.

[0041] The beneficial effects of the present invention are as follows: by obtaining the fuel cell power, fuel cell efficiency, vehicle hydrogen consumption and vehicle electricity consumption of the target fuel cell vehicle in the current operating cycle; judging and comparing the operating parameters in the current operating cycle with the operating parameters in the previous operating cycle, specifically, judging whether the difference between the vehicle hydrogen consumption in the current operating cycle and the vehicle hydrogen consumption in the previous operating cycle is less than a preset hydrogen consumption difference threshold; if so, determining the vehicle operating state in the current operating cycle as normal; if not, judging whether the difference between the vehicle electricity consumption in the current operating cycle and the vehicle electricity consumption in the previous operating cycle is greater than a preset electricity consumption difference threshold; if so, determining the vehicle operating state in the current operating cycle as pending confirmation; if not, judging whether the difference between the fuel cell power in the previous operating cycle and the fuel cell power in the current operating cycle is less than a preset first power difference threshold; if so, judging whether the difference between the fuel cell efficiency in the previous operating cycle and the fuel cell efficiency in the current operating cycle is Is it less than the preset efficiency difference threshold; if so, the operating state of the whole vehicle in the current operating cycle is determined to be to be optimized; if not, the operating state of the whole vehicle in the current operating cycle is determined to be to be confirmed; if not, it is determined whether the difference between the fuel cell power of the previous operating cycle and the fuel cell power of the current operating cycle is greater than the preset second power difference threshold; if so, the operating state of the whole vehicle in the current operating cycle is determined to be to be confirmed; if not, the operating state of the whole vehicle in the current operating cycle is determined to be to be optimized, so as to realize real-time understanding of the performance changes of the fuel cell, monitor the performance parameters of the fuel cell in each operating cycle, and use the performance parameters to complete the analysis of the performance changes of the fuel cell, and finally confirm and judge the operating state of the whole vehicle. The data source is accurate and correct, which improves the accuracy of the subsequent analysis of the operating state of the whole vehicle, so that the staff can timely understand the operating state of each target fuel cell vehicle, and is no longer restricted by the type of vehicle, and has a wider scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a flow chart of a management method based on a fuel cell vehicle in an actual application scenario according to one aspect of the present application;

[0043] Figure 2 It is a structural schematic diagram of an energy management system of a fuel cell vehicle in an actual application scenario according to another aspect of the present application. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail in a clear and complete manner in conjunction with the accompanying drawings and embodiments.

[0045] The idea of ​​the present invention is to monitor the operating parameters of the target fuel cell vehicle in each operating cycle in real time, and then determine the changes in the operating parameters in adjacent operating cycles. According to the changes in the operating parameters, the operating status of the entire vehicle in the current operating cycle is determined, so as to fully consider the performance changes of the fuel cell during the operation process, and quickly and conveniently complete the determination of the operating status, thereby facilitating the subsequent management of the target fuel cell vehicle.

[0046] Method Example 1:

[0047] In a management method based on fuel cell vehicles proposed in this application, the method is applied to fuel cell vehicles in a stable operating state, and the fuel cell vehicles in a stable operating state include but are not limited to buses with fixed driving routes, etc. The method includes steps S11 to S15, specifically:

[0048] Step S11, obtaining the fuel cell power, fuel cell efficiency, vehicle hydrogen consumption and vehicle electricity consumption of the target fuel cell vehicle in the current operating cycle; it should be noted that in order to reasonably obtain the performance parameters in the current operating cycle, combined with the characteristics of subtle performance changes of fuel cells within a day in actual application scenarios, the current operating cycle can be a time interval with obvious performance changes. In a preferred embodiment of the present application, the current operating cycle is preferably one week.

[0049] Corresponding to the current operation cycle in step S11, the fuel cell power, fuel cell efficiency, vehicle hydrogen consumption and vehicle electricity consumption in the previous operation cycle corresponding to the current operation cycle are obtained, and step S12 is continued to be executed to determine whether the difference between the vehicle hydrogen consumption in the current operation cycle and the vehicle hydrogen consumption in the previous operation cycle is less than a preset hydrogen consumption difference threshold; if so (that is, the difference between the vehicle hydrogen consumption in the current operation cycle and the vehicle hydrogen consumption in the previous operation cycle is less than the preset hydrogen consumption difference threshold), the vehicle operation state in the current operation cycle is determined to be normal; here, the preset hydrogen consumption difference threshold refers to the hydrogen consumption difference range set for different vehicle types, or different control requirements, or different management requirements; and when the vehicle operation state is normal, it indicates that the energy management strategy of the target fuel cell vehicle does not need to be optimized and adjusted in the current operation cycle.

[0050] It should be noted that, corresponding to the preset hydrogen consumption difference threshold, in the present application, the preset electricity consumption difference threshold, the preset efficiency difference threshold, the preset first power difference threshold and the preset second power difference threshold all refer to difference ranges set for different vehicle types, or different control requirements, or different management requirements, so as to achieve difference judgment that meets various vehicle types or requirements, thereby expanding the application scenarios and application scope, and not being restricted by environmental factors such as vehicle type.

[0051] Step S13, if no (that is, the difference between the vehicle hydrogen consumption in the current operating cycle and the vehicle hydrogen consumption in the previous operating cycle is greater than the preset hydrogen consumption difference threshold), it indicates that the target fuel cell vehicle has a large increase in vehicle hydrogen consumption in the current operating cycle, and the cause of the increase in hydrogen consumption needs to be confirmed. Therefore, it is determined whether the difference between the vehicle power consumption in the current operating cycle and the vehicle power consumption in the previous operating cycle is greater than the preset power consumption difference threshold; if yes (that is, the difference between the vehicle power consumption in the current operating cycle and the vehicle power consumption in the previous operating cycle is greater than the preset power consumption difference threshold), the vehicle operating status in the current operating cycle is determined as pending confirmation; it should be noted that when the difference between the vehicle power consumption in the current operating cycle and the vehicle power consumption in the previous operating cycle is greater than the preset power consumption difference threshold, it indicates that the target fuel cell vehicle may have a severe vehicle operating condition or an abnormal increase in vehicle power consumption in the current operating cycle, and it is necessary to notify after-sales or technical personnel for investigation and confirmation. If not (i.e., the difference between the vehicle power consumption in the current operating cycle and the vehicle power consumption in the previous operating cycle is less than the preset power consumption difference threshold), it indicates that the vehicle operating condition of the target fuel cell vehicle has basically not changed in the current operating cycle, and the increase in hydrogen consumption may be caused by fuel cell attenuation. Therefore, it is determined whether the difference between the fuel cell power in the previous operating cycle and the fuel cell power in the current operating cycle is less than the preset first power difference threshold.

[0052] Step S14, if (i.e., the difference between the fuel cell power of the previous operation cycle and the fuel cell power of the current operation cycle is less than the preset first power difference threshold), then continue to determine whether the difference between the fuel cell efficiency of the previous operation cycle and the fuel cell efficiency of the current operation cycle is less than the preset efficiency difference threshold; if (i.e., the difference between the fuel cell efficiency of the previous operation cycle and the fuel cell efficiency of the current operation cycle is less than the preset efficiency difference threshold), then it indicates that the fuel cell performance of the target fuel cell vehicle has no obvious change in the current operation cycle, but there are problems such as insufficient robustness of the energy management strategy of the whole vehicle, and the energy management strategy needs to be optimized, and the operation state of the whole vehicle in the current operation cycle is determined to be to be optimized; if not (i.e., the difference between the fuel cell efficiency of the previous operation cycle and the fuel cell efficiency of the current operation cycle is greater than the preset efficiency difference threshold), then it indicates that the fuel cell system or hydrogen storage system of the target fuel cell vehicle has leakage in the current operation cycle, which is caused by a decrease in hydrogen utilization, and it is necessary to notify after-sales or technical personnel to conduct investigation and confirmation, and the operation state of the whole vehicle in the current operation cycle is determined to be to be confirmed;

[0053] Step S15, if not (i.e., the difference between the fuel cell power in the previous operation cycle and the fuel cell power in the current operation cycle is greater than the preset first power difference threshold), then determine whether the difference between the fuel cell power in the previous operation cycle and the fuel cell power in the current operation cycle is greater than the preset second power difference threshold; if so, it indicates that there is an abnormality in the fuel cell of the target fuel cell vehicle in the current operation cycle, and it is necessary to notify the after-sales or technical personnel for troubleshooting and confirmation later, and determine the vehicle operation status in the current operation cycle as to be confirmed; if not, determine the vehicle operation status in the current operation cycle as to be optimized; here, the second power difference threshold is greater than the first power difference threshold.

[0054] Through the above steps S11 to S15, the performance parameters, hydrogen consumption parameters, and power consumption parameters of the fuel cell in the currently obtained current operation cycle are realized. While monitoring the fuel cell and vehicle parameters, the relationship between the corresponding parameters in the current operation cycle and the previous operation cycle is clearly and accurately analyzed, so as to understand the vehicle operation status in the current operation cycle, which is convenient for users and technical personnel to understand the situation of the target fuel cell vehicle in real time.

[0055] In a preferred embodiment of the present application, first, obtain the fuel cell power P1, fuel cell efficiency α1, vehicle hydrogen consumption m1, and vehicle power consumption W1 of the target fuel cell vehicle within a week; correspondingly, obtain the fuel cell power P0, fuel cell efficiency α0, vehicle hydrogen consumption m0, and vehicle power consumption W0 within the previous week. Calculate vehicle hydrogen consumption m1 - vehicle hydrogen consumption m0 = m`, when m`<m (preset hydrogen consumption difference threshold), determine the vehicle operation status within this week as normal and no optimization adjustment is required; when m`>m, the vehicle hydrogen consumption of the target fuel cell vehicle increases significantly within this week, and the reason for the increase in hydrogen consumption needs to be confirmed.

[0056] Next, calculate vehicle power consumption W1 - vehicle power consumption W0 = W`, when W`>W (preset power consumption difference threshold), there may be situations such as the vehicle working conditions becoming more severe or abnormal power consumption increase in the vehicle of the target fuel cell vehicle within this week, and it is necessary to notify the after-sales or technical personnel for troubleshooting and confirmation later; when W`<W, the vehicle working conditions of the target fuel cell vehicle basically do not change within this week, and the increase in hydrogen consumption may be caused by fuel cell decay.

[0057] Then, calculate fuel cell power P0 - fuel cell power P1 = P`, when P`<P, calculate fuel cell efficiency α0 - fuel cell efficiency α1 = αˋ. When αˋ<α (preset efficiency difference threshold), the fuel cell performance of the target fuel cell vehicle does not change significantly within this week, but there are problems such as insufficient robustness of the vehicle energy management strategy, and the energy management strategy needs to be optimized; when αˋ>α, there is a leak in the system of the target fuel cell vehicle within this week, which is caused by the decrease in hydrogen utilization rate, and it is necessary to notify the after-sales or technical personnel for troubleshooting and confirmation later.

[0058] Finally, when P` > P (the preset first power difference threshold) and P` > A (the second power difference threshold), there is an abnormality in the fuel cell of the target fuel cell vehicle within this week, and it is necessary to notify the after-sales or technical personnel for investigation and confirmation later; when P` > P (the preset first power difference threshold) and P` < A (the second power difference threshold), the running state of the whole vehicle within this week is determined to be to be optimized.

[0059] Continuing with the above embodiments of the present application, the fuel cell power of the current operating cycle is calculated by the following method:

[0060] Obtain the operating data of the fuel cell system of the target fuel cell vehicle during the current operating cycle; here, the operating data of the fuel cell system includes but is not limited to performance parameters such as the current, voltage, power, and temperature of the fuel cell.

[0061] Normalize the operating data of the fuel cell system, fit the fuel cell current-power curve during the current cycle, use the common operating current point of the fuel cell as the reference current, obtain the reference fuel cell power corresponding to the reference current, and determine the reference fuel cell power as the fuel cell power of the current operating cycle for fuel cell degradation analysis, so as to eliminate the operating data of the fuel cell vehicle under non-stable states, such as the operating data before and after load change, when the temperature has not reached the reaction temperature, etc., in order to facilitate data fitting and ensure the accuracy of data fitting analysis.

[0062] Continuing with the above embodiments of the present application, the fuel cell efficiency of the current operating cycle is calculated by the following method:

[0063] Obtain the instantaneous hydrogen consumption and the lower calorific value of hydrogen of the target fuel cell vehicle during the current operating cycle; here, in the actual application scenario, obtain the instantaneous hydrogen consumption, cumulative hydrogen consumption, and the lower calorific value of hydrogen from the vehicle-mounted hydrogen system controller, etc.

[0064] Calculate the fuel cell efficiency according to the fuel cell power, instantaneous hydrogen consumption, and the lower calorific value of hydrogen; normalize the fuel cell efficiency, fit the fuel cell power-efficiency curve during the current cycle, use the common operating power point of the fuel cell as the reference power, obtain the reference fuel cell efficiency corresponding to the reference power, and determine the reference fuel cell efficiency as the fuel cell efficiency of the current operating cycle for the analysis of the hydrogen consumption of the whole vehicle, eliminate the operating data of the fuel cell vehicle under non-stable states, and improve the accuracy of curve fitting analysis.

[0065] Specifically, the fuel cell efficiency is calculated by the following formula:

[0066] Fuel cell efficiency = fuel cell power ÷ instantaneous hydrogen consumption ÷ lower calorific value of hydrogen.

[0067] Following the above embodiment of the present application, the hydrogen consumption of the whole vehicle is calculated by the following formula:

[0068]

[0069] It should be noted that the instantaneous hydrogen consumption and the cumulative hydrogen consumption are obtained from the on-board hydrogen system controller; the vehicle mileage is obtained from the vehicle controller; based on the current operation cycle, the terminal cumulative hydrogen consumption, the initial cumulative hydrogen consumption, the terminal operation mileage and the initial operation mileage are obtained to calculate the vehicle hydrogen consumption.

[0070] Following the above embodiment of the present application, the vehicle power consumption is calculated by the following formula:

[0071]

[0072] It should be noted that the vehicle's mileage and cumulative power generation are obtained from the vehicle controller; based on the current operation cycle, the terminal cumulative power generation, initial cumulative power generation, terminal mileage and initial mileage are obtained to calculate the vehicle's power consumption.

[0073] In another aspect of the present application, a management method based on a fuel cell vehicle is proposed, further comprising:

[0074] During the current operation cycle, the current operating conditions of the target fuel cell vehicle are confirmed.

[0075] According to the current operating conditions, the operating data of the target fuel cell vehicle under abnormal operating conditions are eliminated; here, the abnormal operating conditions include but are not limited to the operating data of the target fuel cell vehicle before and after the load change or the data when the temperature of the target fuel cell vehicle does not reach the reaction temperature, so as to ensure the stability of the subsequent fitting analysis of the data, improve the accuracy of subsequent data calculation and operating status analysis, and make the analysis results more referenceable.

[0076] In another aspect of the present application, in a management method based on a fuel cell vehicle, when the operation state of the whole vehicle is determined to be to be optimized, the optimization is performed in the following manner:

[0077] A fuel cell power-efficiency curve is obtained, and calibration parameters in an energy management strategy of a current operation cycle are corrected based on the fuel cell power-efficiency curve.

[0078] The target fuel cell vehicle executes the energy management strategy with corrected calibration parameters and monitors the hydrogen consumption of the entire vehicle.

[0079] According to the fuel cell power-efficiency curve, when the energy management strategy of the current operation cycle only needs to adjust the calibration parameters, the calibration parameters are adjusted according to the following formula:

[0080]

[0081] When the energy management strategy of the current operation cycle does not only adjust the calibration parameters, the calibration parameters are adjusted using an offline simulation method.

[0082] Method Example 2:

[0083] like Figure 1 As shown, it is a flow chart of a management method based on fuel cell vehicles in an actual application scenario according to one aspect of the present application, wherein the respective operating data are collected from the fuel cell system controller, the on-board hydrogen system controller and the whole vehicle controller of the target fuel cell vehicle, and all the collected operating data are uploaded to the big data storage device through the whole vehicle T-BOX (Telematics-BOX, vehicle networking control unit) network terminal; and the operating data such as the fuel cell current, fuel cell power, instantaneous hydrogen consumption, cumulative hydrogen consumption and running mileage within a week are extracted through the big data storage device.

[0084] According to the operating conditions of the fuel cell within a week, the operating data under non-stable conditions are eliminated, such as the operating data before and after the load change or the operating data when the temperature does not reach the reaction temperature, etc., to ensure the accuracy of the data fitting analysis.

[0085] Through normalization analysis and data differentiation processing, the fuel cell power P1, fuel cell efficiency α1, vehicle hydrogen consumption m1 and vehicle electricity consumption W1 within a week are determined respectively; correspondingly, the fuel cell power P0, fuel cell efficiency α0, vehicle hydrogen consumption m0 and vehicle electricity consumption W0 of the previous week are obtained.

[0086] If m1-m0<=m (preset hydrogen consumption difference threshold), the vehicle operates normally and the energy management strategy does not need to be optimized or adjusted.

[0087] If m1-m0>m, the hydrogen consumption of the whole vehicle will increase significantly, and the reason for the increase in hydrogen consumption of the whole vehicle needs to be confirmed.

[0088] If W1-W0>W (preset power consumption difference threshold), the vehicle's operating conditions may have become more severe or the vehicle's power consumption may have increased abnormally. Notify after-sales or technical personnel for investigation.

[0089] If W1-W0<=W, the operating condition of the whole vehicle has basically not changed, which may be caused by the attenuation of the fuel cell. Confirm the changes in the fuel cell efficiency α and P. If P0-P1<=P (the preset first power difference threshold) and α0-α1<=α (the preset efficiency difference threshold), the fuel cell performance has no obvious change, which may be due to the insufficient robustness of the vehicle energy management strategy and needs to be optimized; if P0-P1<=P and α0-α1>α, it may be caused by leakage in the system and the decrease in hydrogen utilization rate. It is necessary to notify after-sales for investigation; if P0-P1>P, it is caused by the attenuation of the fuel cell. If P0-P1>A (the preset second power difference threshold, and A>P), there is an abnormality in the fuel cell. Notify after-sales for maintenance, otherwise optimize the energy management strategy of the whole vehicle.

[0090] For operating conditions that only require adjustment of calibration parameters, optimization is performed using the ECMS transient optimal control method. For operating conditions that do not only require adjustment of calibration parameters, it is necessary to use offline simulation methods to determine the optimal energy management strategy calibration parameters. Finally, with the help of the big data platform, the fuel cell power-efficiency curve of the target fuel cell vehicle is automatically replaced through vehicle OTA (Over-the-Air Technology), and control is performed according to the latest energy management strategy. The hydrogen consumption of the vehicle is continuously monitored to ensure the optimal hydrogen consumption over the entire life cycle of the fuel cell.

[0091] Fuel cell vehicle example:

[0092] In another aspect of the present application, a fuel cell vehicle is also provided, the fuel cell vehicle comprising:

[0093] One or more memories and one or more processors.

[0094] The one or more memories are used to store computer programs.

[0095] The one or more processors are connected to the memory and are used to run the computer program to execute the above-mentioned management method based on fuel cell vehicles.

[0096] like Figure 2As shown, it is a structural schematic diagram of an energy management control system of a fuel cell vehicle in an actual application scenario according to another aspect of the present application, wherein the fuel cell system, the on-board hydrogen system and the whole vehicle controller transmit the operating data (specifically, extracting the current, voltage, power, temperature, etc. of the fuel cell from the fuel cell system controller; extracting the instantaneous hydrogen consumption and the cumulative hydrogen consumption, etc. from the on-board hydrogen system controller; extracting the cumulative power generation, the whole vehicle mileage, etc. from the whole vehicle controller) to the whole vehicle T-BOX through the CAN bus; the whole vehicle T-BOX establishes a connection with the storage device via the network to upload the operating data to the storage device; the big data platform extracts the operating data of the target fuel cell vehicle from the storage device, and analyzes the hydrogen consumption and attenuation of the operating data in the current operating cycle, and then confirms the operating state of the fuel cell vehicle within the current operating state according to the analysis results, and optimizes the calibration parameters of the target new energy vehicle whose operating state is to be optimized; and transfers the target new energy vehicle whose operating state is to be confirmed to after-sales service for subsequent follow-up.

Claims

1. A management method based on fuel cell vehicles, characterized in that: The method comprises: Obtain the fuel cell power, fuel cell efficiency, vehicle hydrogen consumption and vehicle electricity consumption of the target fuel cell vehicle in the current operation cycle; When the difference between the whole vehicle hydrogen consumption in the current operation cycle and the whole vehicle hydrogen consumption in the previous operation cycle is greater than the preset hydrogen consumption difference threshold, and the difference between the whole vehicle power consumption in the current operation cycle and the whole vehicle power consumption in the previous operation cycle is less than the preset power consumption difference threshold, determine whether the difference between the fuel cell power in the previous operation cycle and the fuel cell power in the current operation cycle is less than the preset first power difference threshold; If so, when the difference between the fuel cell efficiency of the previous operation cycle and the fuel cell efficiency of the current operation cycle is less than a preset efficiency difference threshold, the operation state of the entire vehicle in the current operation cycle is determined as to be optimized; If not, when the difference between the fuel cell power of the previous operation cycle and the fuel cell power of the current operation cycle is less than a preset second power difference threshold, the vehicle operation state in the current operation cycle is determined to be to be optimized.

2. The management method based on fuel cell vehicles according to claim 1, characterized in that: The fuel cell power of the current operation cycle is calculated by the following method: Obtaining the operating data of the fuel cell system of the target fuel cell vehicle in the current operating cycle; The operating data of the fuel cell system is normalized and the fuel cell current-power curve in the current cycle is fitted. The common operating current point of the fuel cell is used as the reference current to obtain the reference fuel cell power corresponding to the reference current, and the reference fuel cell power is determined as the fuel cell power of the current operating cycle.

3. The management method based on fuel cell vehicles according to claim 1, characterized in that: The fuel cell efficiency of the current operation cycle is calculated by the following method: Obtain the instantaneous hydrogen consumption and low-value calorific value of hydrogen of the target fuel cell vehicle in the current operation cycle; Calculate the fuel cell efficiency based on the fuel cell power, instantaneous hydrogen consumption and low-value calorific value of hydrogen; The fuel cell efficiency is normalized and fitted to the fuel cell power-efficiency curve in the current cycle. The common operating power point of the fuel cell is used as the reference power to obtain the reference fuel cell efficiency corresponding to the reference power. The reference fuel cell efficiency is determined as the fuel cell efficiency of the current operating cycle.

4. The management method based on fuel cell vehicles according to claim 3 is characterized in that: The fuel cell efficiency is calculated by the following formula: Fuel cell efficiency = fuel cell power ÷ instantaneous hydrogen consumption ÷ hydrogen lower calorific value.

5. The management method based on fuel cell vehicles according to claim 1, characterized in that: The vehicle hydrogen consumption is calculated by the following formula: The vehicle power consumption is calculated by the following formula:

6. The management method based on a fuel cell vehicle according to any one of claims 1 to 5, characterized in that: Also includes: During the current operation cycle, confirm the current operating conditions of the target fuel cell vehicle; Based on the current operating conditions, the operating data of the target fuel cell vehicle under abnormal operating conditions is eliminated.

7. The management method based on fuel cell vehicles according to claim 1, characterized in that: When the difference between the vehicle hydrogen consumption in the current operation cycle and the vehicle hydrogen consumption in the previous operation cycle is less than a preset hydrogen consumption difference threshold, the vehicle operation state in the current operation cycle is determined to be normal; When the difference between the vehicle hydrogen consumption in the current operation cycle and the vehicle hydrogen consumption in the previous operation cycle is greater than the preset hydrogen consumption difference threshold, but the difference between the vehicle power consumption in the current operation cycle and the vehicle power consumption in the previous operation cycle is greater than the preset power consumption difference threshold; or, When the difference between the whole vehicle hydrogen consumption in the current operation cycle and the whole vehicle hydrogen consumption in the previous operation cycle is greater than the preset hydrogen consumption difference threshold, and the difference between the whole vehicle power consumption in the current operation cycle and the whole vehicle power consumption in the previous operation cycle is less than the preset power consumption difference threshold, and the difference between the fuel cell power in the previous operation cycle and the fuel cell power in the current operation cycle is less than the preset first power difference threshold, and the difference between the fuel cell efficiency in the previous operation cycle and the fuel cell efficiency in the current operation cycle is greater than the preset efficiency difference threshold; or, When the difference between the whole vehicle hydrogen consumption in the current operating cycle and the whole vehicle hydrogen consumption in the previous operating cycle is greater than the preset hydrogen consumption difference threshold, and the difference between the whole vehicle power consumption in the current operating cycle and the whole vehicle power consumption in the previous operating cycle is less than the preset power consumption difference threshold, and the difference between the fuel cell power in the previous operating cycle and the fuel cell power in the current operating cycle is greater than the preset first power difference threshold, and the difference between the fuel cell power in the previous operating cycle and the fuel cell power in the current operating cycle is greater than the preset second power difference threshold, the operating status of the whole vehicle in the current operating cycle is determined as pending confirmation.

8. The management method based on fuel cell vehicles according to claim 1, characterized in that: When the vehicle operation status is determined to be to be optimized, optimization is performed in the following ways: Obtaining a fuel cell power-efficiency curve, and modifying calibration parameters in an energy management strategy of a current operation cycle based on the fuel cell power-efficiency curve; The target fuel cell vehicle executes the energy management strategy with corrected calibration parameters and monitors the hydrogen consumption of the entire vehicle.

9. The management method based on fuel cell vehicles according to claim 8, characterized in that: The method of correcting the calibration parameters in the energy management strategy of the current operation cycle based on the fuel cell power-efficiency curve includes: According to the fuel cell power-efficiency curve, when the energy management strategy of the current operation cycle only needs to adjust the calibration parameters, the calibration parameters are adjusted according to the following formula: When the energy management strategy of the current operation cycle does not only adjust the calibration parameters, the calibration parameters are adjusted using an offline simulation method.

10. A fuel cell vehicle, characterized in that: Fuel cell vehicles include: one or more memories and one or more processors; The one or more memories are used to store computer programs; The one or more processors are connected to the memory and configured to run the computer program to perform the method according to any one of claims 1 to 9.

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