Fuel cell maintenance mileage determination method, device, equipment and storage medium

Abstract

The present invention relates to the technical field of vehicle battery maintenance, and provides a method, device, equipment and storage medium for determining the maintenance mileage of a fuel cell, by obtaining the vehicle stack operation data, historical maintenance mileage and current mileage; determining the vehicle operating condition according to the vehicle stack operation data; determining the vehicle fuel cell wear mileage according to all vehicle operating conditions and vehicle stack operation data; and determining the vehicle fuel cell real-time maintenance mileage according to the vehicle fuel cell wear mileage, historical maintenance mileage and current mileage. The technical solution of the present invention calculates the wear mileage of the fuel cell under each operating condition based on different vehicle operating conditions, thereby determining the real-time maintenance mileage of the fuel cell based on the wear mileage under each operating condition, mastering the use status of the fuel cell, and improving the safety of the fuel cell during vehicle operation.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle battery maintenance, and in particular to a method, device, equipment and storage medium for determining the maintenance mileage of a fuel cell. Background Art

[0002] Fuel cells are a completely clean and pollution-free energy solution with a wide range of operational application scenarios in the process of carbon neutrality, especially in large commercial vehicles such as freight trucks, which are an important source of carbon emissions in today's society. During operation, performance degradation is inevitable. Performance degradation can be divided into reversible loss and irreversible loss. Reversible loss can be optimized through activation measures, and reversible loss is usually higher than irreversible loss. However, if it is not maintained or maintained in time, it will develop into irreversible loss over time, so timely maintenance is required.

[0003] At present, in the existing technology, the maintenance of fuel cells mainly focuses on the hardware settings of the fuel cells, such as the maintenance of the fuel cell system's wearing parts such as the fuel cell's ionizer, air filter, etc., and it is impossible to maintain the mileage of the fuel cell during vehicle operation. Therefore, there is an urgent need for a mileage maintenance plan for vehicle fuel cells under different vehicle operating conditions. Summary of the invention

[0004] The present invention provides a method, device, equipment and storage medium for determining the maintenance mileage of a fuel cell, so as to solve the defect in the prior art that the mileage of a fuel cell during vehicle operation cannot be maintained, and realizes calculation of the loss mileage of the fuel cell under various vehicle operating conditions based on different vehicle operating conditions, thereby determining the real-time maintenance mileage of the fuel cell based on the loss mileage under various operating conditions, mastering the use status of the fuel cell, and improving the safety of the fuel cell during vehicle operation.

[0005] The present invention provides a method for determining the maintenance mileage of a fuel cell, comprising the following steps.

[0006] Obtain vehicle fuel cell stack operation data, historical maintenance mileage and current mileage; among which, historical maintenance mileage is the total mileage of the vehicle's historical maintenance, current mileage refers to the difference between the vehicle's total mileage and historical maintenance mileage, and vehicle fuel cell stack operation data is data that reflects the vehicle's fuel cell stack status and vehicle operating status during operation.

[0007] The vehicle operating condition is determined based on the vehicle fuel cell operation data; wherein the vehicle operating condition includes at least one of the fuel cell idle condition, the fuel cell high load condition, the fuel cell variable load condition, the fuel cell normal temperature start-stop condition, the fuel cell low temperature start-stop condition and the fuel cell emergency stop condition.

[0008] The vehicle fuel cell wear mileage is determined based on all vehicle operating conditions and vehicle stack operating data.

[0009] The real-time maintenance mileage of the vehicle's fuel cell is determined based on the vehicle's fuel cell wear mileage, historical maintenance mileage and current mileage.

[0010] According to a method for determining the maintenance mileage of a fuel cell provided by the present invention, the vehicle stack operation data includes the fuel cell stack voltage, the stack power change slope and the stack start-stop state; the vehicle operating condition is determined based on the vehicle stack operation data, including: when the fuel cell stack voltage is greater than a first preset voltage, the vehicle operating condition is determined to be a stack idle condition; when the fuel cell stack voltage is greater than a second preset voltage, the vehicle operating condition is determined to be a stack high load condition; wherein the first preset voltage is greater than the second preset voltage; when the stack power change slope is greater than the preset slope, the vehicle operating condition is determined to be a stack variable load condition; when the stack start-stop state includes normal start-up at normal temperature and normal shutdown at normal temperature, the vehicle operating condition is determined to be a normal temperature start-stop condition; when the stack start-stop state includes normal start-up at low temperature and normal shutdown at low temperature, the vehicle operating condition is determined to be a low temperature start-stop condition; when the stack start-stop state includes normal start-up and abnormal shutdown at low temperature, the vehicle operating condition is determined to be a stack emergency stop condition.

[0011] According to a method for determining the maintenance mileage of a fuel cell provided by the present invention, the vehicle fuel cell wear mileage is determined based on all vehicle operating conditions and vehicle stack operating data, including: determining the wear mileage corresponding to all vehicle operating conditions based on all vehicle operating conditions and vehicle stack operating data; determining the vehicle fuel cell wear mileage based on the sum of all wear mileages.

[0012] According to a method for determining the maintenance mileage of a fuel cell provided by the present invention, the loss mileage corresponding to all vehicle operating conditions is determined based on all vehicle operating conditions and vehicle stack operating data, including: respectively determining the loss coefficients corresponding to all vehicle operating conditions; respectively determining the loss mileage corresponding to all vehicle operating conditions based on the product of all loss coefficients and the vehicle stack operating data.

[0013] According to a method for determining the maintenance mileage of a fuel cell provided by the present invention, the loss coefficient includes at least one of an idle loss coefficient, a high load loss coefficient, a variable load loss coefficient, a normal temperature loss coefficient, a low temperature loss coefficient and an emergency stop loss coefficient; the loss coefficients corresponding to all vehicle operating conditions are determined respectively, including: when the vehicle operating condition is an idle condition of the stack, the idle loss coefficient Q1=S2 / S1-1; wherein S1 represents a first reference voltage attenuation rate determined after controlling the vehicle fuel cell to operate at a fixed power at a first power point, S2 represents a second reference voltage attenuation rate determined after controlling the vehicle fuel cell to operate at a fixed power at a second power point, and the first power point is greater than the second power point; when the vehicle operating condition is a high load condition of the stack, the high load loss coefficient Q2=S3 / S1-1; wherein S3 represents a third reference voltage attenuation rate determined after controlling the vehicle fuel cell to operate at a fixed power at a third power point, and the third power point is greater than the first power point; when the vehicle operating condition is a variable load condition of the stack, the variable load loss coefficient Q3=(S4 / A1) / (S1 / 1000) ; Wherein, S4 represents the fourth reference voltage attenuation rate determined by controlling the vehicle fuel cell to operate between the second power point and the fourth power point, the fourth power point is greater than the third power point, and A1 represents the variable load power span of the vehicle fuel cell; when the vehicle operating condition is the normal temperature start-stop condition of the stack, the normal temperature loss coefficient Q4=(S5 / 100) / (S1 / 1000); wherein, S5 represents the fifth reference voltage attenuation rate determined when the number of repeated starts and stops of the vehicle fuel cell under normal temperature of the stack is equal to the preset number, and the preset number is the pre-set number of starts and stops; when the vehicle operating condition is the low temperature start-stop condition of the stack, the low temperature loss coefficient Q5=(S6 / 100) / (S1 / 1000); wherein, S6 represents the sixth reference voltage attenuation rate determined when the number of repeated starts and stops of the vehicle fuel cell under normal temperature of the stack is equal to the preset number; when the vehicle operating condition is the emergency stop condition of the stack, the emergency stop loss coefficient Q6=(S6 / 100) / (S1 / 1000).

[0014] According to a method for determining the maintenance mileage of a fuel cell provided by the present invention, the vehicle stack operating data also includes the vehicle average operating speed; the loss mileage corresponding to all vehicle operating conditions is determined based on the product of all loss coefficients and the vehicle stack operating data, including: obtaining the operating time corresponding to all vehicle operating conditions and the vehicle average operating speed respectively; determining the loss mileage corresponding to all vehicle operating conditions based on the vehicle average operating speed, the operating time corresponding to all vehicle operating conditions and the product of all loss coefficients.

[0015] According to a method for determining the maintenance mileage of a fuel cell provided by the present invention, the real-time maintenance mileage of the vehicle fuel cell is determined based on the vehicle fuel cell wear mileage, historical maintenance mileage and current driving mileage, including: determining the initial maintenance mileage based on the sum of the current driving mileage and the vehicle fuel cell wear mileage; determining the real-time maintenance mileage of the vehicle fuel cell based on the difference between the historical maintenance mileage and the initial maintenance mileage.

[0016] The present invention also provides a fuel cell maintenance mileage determination device, comprising the following modules.

[0017] The data acquisition module is used to obtain the vehicle stack operation data, historical maintenance mileage and current mileage; among which, the historical maintenance mileage is the total mileage of the vehicle's historical maintenance, the current mileage refers to the difference between the vehicle's total mileage and the historical maintenance mileage, and the vehicle stack operation data is the data reflecting the vehicle's fuel cell stack condition and vehicle operation status during the operation of the vehicle.

[0018] The operating condition determination module is used to determine the vehicle operating condition based on the vehicle battery stack operation data; wherein the vehicle operating condition includes at least one of the battery stack idle condition, battery stack high load condition, battery stack variable load condition, battery stack normal temperature start and stop condition, battery stack low temperature start and stop condition and battery stack emergency stop condition.

[0019] The wear mileage determination module is used to determine the vehicle fuel cell wear mileage based on all vehicle operating conditions and vehicle stack operation data.

[0020] The maintenance mileage determination module is used to determine the real-time maintenance mileage of the vehicle fuel cell based on the vehicle fuel cell wear mileage, historical maintenance mileage and current driving mileage.

[0021] The present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, any of the above-mentioned methods for determining the maintenance mileage of a fuel cell is implemented.

[0022] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the maintenance mileage determination method of any of the above-mentioned fuel cells is implemented.

[0023] The present invention also provides a computer program product, including a computer program, which implements any of the above-mentioned methods for determining the maintenance mileage of a fuel cell when executed by a processor.

[0024] The present invention provides a method, device, equipment and storage medium for determining the maintenance mileage of a fuel cell, by obtaining the vehicle stack operation data, historical maintenance mileage and current mileage; wherein the historical maintenance mileage is the total mileage of the vehicle's historical maintenance, the current mileage refers to the difference between the vehicle's total mileage and the historical maintenance mileage, the vehicle stack operation data is data reflecting the vehicle fuel cell stack status and the vehicle operation status during the vehicle's operation; the vehicle operating condition is determined according to the vehicle stack operation data; wherein the vehicle operating condition is at least one operating condition; the vehicle fuel cell loss mileage is determined according to all vehicle operating conditions and the vehicle stack operation data; the vehicle fuel cell real-time maintenance mileage is determined according to the vehicle fuel cell loss mileage, historical maintenance mileage and current mileage. The technical solution of the present invention is used to solve the defect that the mileage of the fuel cell cannot be maintained during the operation of the vehicle in the prior art, and realizes the calculation of the fuel cell loss mileage under each operating condition based on different vehicle operating conditions, thereby determining the fuel cell real-time maintenance mileage based on the loss mileage under each operating condition, mastering the use status of the fuel cell, and improving the safety of the fuel cell during the operation of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 It is a flow chart of the method for determining the maintenance mileage of a fuel cell provided by the present invention.

[0027] Figure 2 It is a structural schematic diagram of a fuel cell maintenance mileage determination device provided by the present invention.

[0028] Figure 3 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Combine the following Figure 1The maintenance mileage determination method of the fuel cell provided by the present invention is described. The maintenance mileage determination method of the fuel cell provided by the present invention can be applicable to the maintenance mileage determination situation of the fuel cell. The execution subject of the method can be an electronic device or a maintenance mileage determination device of the fuel cell arranged in the electronic device. The maintenance mileage determination device of the fuel cell can be implemented by software, hardware or a combination of both. Figure 1 FIG. 1 is a flow chart of a method for determining the maintenance mileage of a fuel cell provided by the present invention. Figure 1 As shown, the method includes the following steps.

[0031] Step 101: Obtain vehicle battery stack operation data, historical maintenance mileage, and current mileage.

[0032] In this step, the historical maintenance mileage is the total mileage of the vehicle's historical maintenance, the current mileage refers to the difference between the vehicle's total mileage and the historical maintenance mileage, and the total mileage refers to all the mileage the vehicle has traveled since leaving the factory; the vehicle stack operation data is data that reflects the condition of the vehicle's fuel cell stack and the vehicle's operating status during operation.

[0033] Specifically, during the operation of the vehicle's fuel cell, the vehicle's fuel cell stack operation data, historical maintenance mileage and current mileage are directly obtained through the vehicle's onboard computer.

[0034] Exemplarily, the vehicle battery stack operation data may include battery stack current, battery stack voltage, battery stack operation load data, and other relevant data that are helpful in understanding the vehicle's usage, driving habits, and performance, but this embodiment does not limit this.

[0035] Furthermore, if the fuel cell has not been operated for a long time or the fuel cell has been operated purely electrically for a long time, it is recommended to perform maintenance before starting the fuel cell and restart the calculation of the vehicle fuel cell real-time maintenance mileage.

[0036] In a specific embodiment, the acquisition condition of the vehicle stack operation data is that the control strategy adopted by the fuel cell is to change the load according to the power demand, which will cause the fuel cell to have a relatively high load change frequency. In addition, the load and load slopes calibrated at the factory of different fuel cells may be different. In order to avoid the integrity of data acquisition, the vehicle stack operation data needs to be recorded and acquired at a predetermined time. For example, the vehicle stack operation data may be recorded every 100ms when the fuel cell system is running, and this embodiment does not limit this.

[0037] Step 102: Determine the vehicle operating condition based on the vehicle battery stack operating data.

[0038] In this step, the vehicle operating condition includes at least one of a stack idling condition, a stack high load condition, a stack variable load condition, a stack normal temperature start-stop condition, a stack low temperature start-stop condition, and a stack emergency stop condition.

[0039] In a specific embodiment, the vehicle stack operation data includes the fuel cell stack voltage, the stack power change slope and the stack start-stop state; the vehicle operating condition is determined based on the vehicle stack operation data, including: when the fuel cell stack voltage is greater than a first preset voltage, the vehicle operating condition is determined to be a stack idle condition; when the fuel cell stack voltage is greater than a second preset voltage, the vehicle operating condition is determined to be a stack high load condition; wherein the first preset voltage is greater than the second preset voltage; when the stack power change slope is greater than the preset slope, the vehicle operating condition is determined to be a stack variable load condition; when the stack start-stop state includes normal start-up at normal temperature and normal shutdown at normal temperature, the vehicle operating condition is determined to be a normal temperature start-stop condition; when the stack start-stop state includes normal start-up at low temperature and normal shutdown at low temperature, the vehicle operating condition is determined to be a low temperature start-stop condition; when the stack start-stop state includes normal start-up and abnormal shutdown at low temperature, the vehicle operating condition is determined to be a stack emergency stop condition.

[0040] In this step, the definitions of each working condition are as follows.

[0041] For the stack idle condition, including the low current operating condition that can only maintain the operation of the fuel cell itself and the single cell high voltage condition, the stack idle condition can indicate the condition when the average single cell voltage is greater than 0.8 V. In one embodiment, the stack single cell voltage greater than 0.79 V is regarded as a high voltage condition. Of course, the high voltage condition also includes the low current operating condition, and the device records the duration of the idle condition.

[0042] The high-load condition of the battery stack includes not only the peak power operating condition, but also the single-cell low-voltage condition. The high-load condition of the battery stack can indicate the condition when the average single-cell voltage is lower than 0.6 V. In one embodiment, the battery stack single-cell voltage less than 0.64 V is regarded as a low-voltage condition, and the device records the duration of the high-load condition operation.

[0043] The variable load condition of the stack refers to the condition in which the fuel cell adjusts the external output power, including power increase and power decrease. The slight voltage fluctuation during operation is not included. The variable load condition of the stack can indicate the condition in which the power output curve has a certain slope. In one embodiment, if the slope of the stack power change is greater than a predetermined value, it is considered to be in the variable load condition of the stack, and the device records the power span of the variable load condition.

[0044] The normal temperature start-stop condition of the fuel cell stack refers to a normal temperature start-up and normal temperature shutdown condition of the fuel cell. In one embodiment, the fuel cell stack is normally started once and normally shut down once at normal temperature, which is regarded as completing a start-stop condition, and the device records the number of normal temperature start-stop conditions.

[0045] The stack low temperature start-stop conditions include fuel cell normal temperature start-up and low temperature shutdown conditions, low temperature start-up and low temperature shutdown conditions, and low temperature start-up and normal temperature shutdown conditions, and low temperature means that the ambient temperature is less than or equal to 0° C. In one embodiment, the stack normal temperature start-up and low temperature shutdown conditions, low temperature start-up and low temperature shutdown conditions, and low temperature start-up and normal temperature shutdown conditions are all considered low temperature start-stop conditions, and the device records the number of low temperature start-stop conditions.

[0046] The emergency shutdown condition of the stack refers to the condition that the stack is started normally, but shuts down during operation but does not follow the normal shutdown process. This embodiment does not limit the definition of the above conditions. In one embodiment, a serious fault occurs during the operation of the fuel cell or the vehicle, and after the fuel cell receives the emergency stop command, the stack is shutting down but does not shut down according to the normal shutdown process, and the device records the number of emergency stop conditions.

[0047] Specifically, after obtaining the vehicle stack operation data including the fuel cell stack voltage, the stack power change slope and the stack start-stop state, the vehicle operating condition is determined according to the vehicle stack operation data. When the fuel cell stack voltage is greater than the first preset voltage, the vehicle operating condition is determined to be the stack idle condition; when the fuel cell stack voltage is greater than the second preset voltage, the vehicle operating condition is determined to be the stack high load condition; wherein the first preset voltage is greater than the second preset voltage; when the stack power change slope is greater than the preset slope, the vehicle operating condition is determined to be the stack variable load condition; when the stack start-stop state includes normal start at normal temperature and normal shutdown at normal temperature, the vehicle operating condition is determined to be the normal temperature start-stop condition; when the stack start-stop state includes normal start at low temperature and normal shutdown at low temperature, the vehicle operating condition is determined to be the low temperature start-stop condition; when the stack start-stop state includes normal start and abnormal shutdown, the vehicle operating condition is determined to be the stack emergency stop condition.

[0048] Step 103: Determine the vehicle fuel cell wear mileage based on all vehicle operating conditions and vehicle fuel cell stack operation data.

[0049] In a specific embodiment, the specific implementation steps of determining the vehicle fuel cell wear mileage based on all vehicle operating conditions and vehicle stack operating data include: determining the wear mileage corresponding to all vehicle operating conditions based on all vehicle operating conditions and vehicle stack operating data; determining the vehicle fuel cell wear mileage based on the sum of all wear mileage.

[0050] In a specific embodiment, the loss coefficient includes at least one of an idle loss coefficient, a high load loss coefficient, a variable load loss coefficient, a normal temperature loss coefficient, a low temperature loss coefficient and an emergency stop loss coefficient; the loss coefficients corresponding to all vehicle operating conditions are determined respectively, including: when the vehicle operating condition is the stack idle condition, the idle loss coefficient Q1=S2 / S1-1; wherein S1 represents the first reference voltage attenuation rate determined after the vehicle fuel cell is controlled to operate at a fixed power at a first power point, S2 represents the second reference voltage attenuation rate determined after the vehicle fuel cell is controlled to operate at a fixed power at a second power point, and the first power point is greater than the second power point; when the vehicle operating condition is the stack high load condition, the high load loss coefficient Q2=S3 / S1-1; wherein S3 represents the third reference voltage attenuation rate determined after the vehicle fuel cell is controlled to operate at a fixed power at a third power point, and the third power point is greater than the first power point; when the vehicle operating condition is the stack variable load condition, the variable load loss coefficient Q3=(S4 / A1) / (S1 / 1000) ; Wherein, S4 represents the fourth reference voltage attenuation rate determined by controlling the vehicle fuel cell to operate between the second power point and the fourth power point, the fourth power point is greater than the third power point, and A1 represents the variable load power span of the vehicle fuel cell; when the vehicle operating condition is the normal temperature start-stop condition of the stack, the normal temperature loss coefficient Q4=(S5 / 100) / (S1 / 1000); wherein, S5 represents the fifth reference voltage attenuation rate determined when the number of repeated starts and stops of the vehicle fuel cell under normal temperature of the stack is equal to the preset number, and the preset number is the pre-set number of starts and stops; when the vehicle operating condition is the low temperature start-stop condition of the stack, the low temperature loss coefficient Q5=(S6 / 100) / (S1 / 1000); wherein, S6 represents the sixth reference voltage attenuation rate determined when the number of repeated starts and stops of the vehicle fuel cell under normal temperature of the stack is equal to the preset number; when the vehicle operating condition is the emergency stop condition of the stack, the emergency stop loss coefficient Q6=(S6 / 100) / (S1 / 1000).

[0051] Specifically, the calculation of the loss coefficient under different vehicle operating conditions mainly includes the following.

[0052] The calculation process for the idle loss coefficient is as follows.

[0053] First, after controlling the fuel cell to operate for a predetermined period of time under a selected vehicle operating condition, such as a stack idle condition, the first reference voltage attenuation rate under a stack reference current is measured; after controlling the fuel cell to operate for a predetermined period of time under a stack idle condition, the second reference voltage attenuation rate under a stack reference current is measured.

[0054] For example, there is a 120 kilowatt (kW) fuel cell and a 150kW stack. The stack output is set to 15kW as the idle operating point, the stack output is set to 85kW as the selected vehicle operating condition, the current of 240 amperes (ampere, A) when the stack outputs 85kW is the reference current point, and the voltage of 345 volts (volt, V) is used as the reference voltage. The completed new stack is controlled to run at a fixed power of 70kW for 1000 hours (hour, h), and then the current is adjusted to 240A for 1h, and the first reference voltage attenuation rate S1 relative to the reference voltage at this time is calculated; the completed new stack is controlled to run at a fixed power of 15kW for 1000h, and then the current is adjusted to 240A for 1h, and the second reference voltage attenuation rate S2 relative to the reference voltage at this time is calculated. During the test, there may be fuel cell stack start-stop operating conditions and stack variable load operating conditions. The number of start-stops considered is small, and the power span of variable load is small, which can be ignored.

[0055] Then, the idle loss coefficient is determined according to the first reference voltage decay rate S1 and the second reference voltage decay rate S2, that is, the idle loss coefficient Q1=S2 / S1-1.

[0056] The calculation process for the high load loss factor is as follows.

[0057] First, after controlling the fuel cell to operate for a predetermined period of time under a selected vehicle operating condition, such as a high-load condition of the stack, the first reference voltage attenuation rate under the stack reference current is measured; after controlling the fuel cell to operate for a predetermined period of time under a high-load condition of the stack, the third reference voltage attenuation rate under the stack reference current is measured.

[0058] For example, there is an existing 120kW fuel cell and a 150kW stack. The stack output is set to 150kW as the high load operating point, the stack output is set to 85kW as the selected operating condition, the current 240A when the stack outputs 85kW is the reference current point, and the voltage 345V is the reference voltage. For example, the completed new stack is controlled to run at a fixed power of 70kW for 1000 hours, and then the current is adjusted to 240A for 1 hour, and the first reference voltage attenuation rate S1 relative to the reference voltage is calculated at this time; the completed new stack is controlled to run at a fixed power of 150kW for 1000 hours, and then the current is adjusted to 240A for 1 hour, and the third reference voltage attenuation rate S3 relative to the reference voltage is calculated at this time.

[0059] Then, the high load loss coefficient is determined according to the first reference voltage attenuation rate S1 and the third reference voltage attenuation rate S3, that is, the high load loss coefficient Q2=S3 / S1-1.

[0060] The calculation process for the variable load loss coefficient is as follows.

[0061] First, after controlling the fuel cell to operate for a predetermined period of time under a selected vehicle operating condition such as a stack variable load condition, the first reference voltage attenuation rate under the stack reference current is measured; after controlling the fuel cell to operate for a predetermined period of time under the stack variable load condition, the fourth reference voltage attenuation rate under the stack reference current is measured.

[0062] Exemplarily, the existing 120kW fuel cell system, 150kW stack, stack output 85kW is the selected working condition, the current 240A when the stack outputs 85kW is the reference current point, and the voltage 345V is the reference voltage, as an example. The completed new stack is controlled to run at a fixed power of 70kW for 1000h, and then the current is adjusted to 240A for 1h, and the first reference voltage attenuation rate S1 relative to the reference voltage at this time is calculated; the completed new stack is controlled to run at variable loads at 15kW power points and 150kW power points for 1000h, and the variable load power span A1 is calculated at this time, and then the current is adjusted to 240A for 1h, and the fourth reference voltage attenuation rate S4 relative to the reference voltage at this time is calculated.

[0063] Then, the variable load loss coefficient is determined according to the first reference voltage attenuation rate S1, the fourth reference voltage attenuation rate S4 and the variable load power span A1, that is, the variable load loss coefficient Q3=(S4 / A1) / (S1 / 1000).

[0064] The calculation process for the normal temperature loss coefficient is as follows.

[0065] First, after controlling the fuel cell to run for a predetermined period of time under a selected vehicle operating condition, such as a stack at normal temperature, measure the first reference voltage decay rate under the stack reference current; control the fuel cell to start and stop a predetermined number of times under a normal temperature start-stop condition, start the fuel cell to run to the reference current point, and measure the fifth reference voltage decay rate S5 under the stack reference current.

[0066] For example, there is a 120kW fuel cell, a 150kW stack, and a stack output of 85kW as the selected working condition. The current of 240A when the stack outputs 85kW is the reference current point, and the voltage of 345V is the reference voltage, as an example. The completed new stack is controlled to run at a fixed power of 70kW for 1000 hours, and then the current is adjusted to 240A for 1 hour, and the first reference voltage attenuation rate S1 relative to the reference voltage at this time is calculated; the completed new stack is controlled to start and stop the stack repeatedly 100 times, and then the current is adjusted to 240A for 1 hour, and the fifth reference voltage attenuation rate S5 relative to the reference voltage at this time is calculated.

[0067] Then, the normal temperature loss coefficient is determined according to the first reference voltage attenuation rate S1 and the fifth reference voltage attenuation rate S5, and the normal temperature loss coefficient Q4=(S5 / 100) / (S1 / 1000).

[0068] The calculation process for the low temperature loss coefficient is as follows.

[0069] First, after controlling the fuel cell to operate for a predetermined period of time under a selected vehicle operating condition, such as a low-temperature condition of the fuel cell stack, the first reference voltage decay rate under the fuel cell stack reference current is measured; the fuel cell is controlled to start and stop a predetermined number of times under the low-temperature start-stop condition, and the fuel cell is started to operate to the reference current point, and the sixth reference voltage decay rate under the fuel cell stack reference current is measured.

[0070] For example, there is a 120kW fuel cell, a 150kW stack, and a stack output of 85kW as the selected working condition. The current of 240A when the stack outputs 85kW is the reference current point, and the voltage of 345V is the reference voltage, as an example. The completed new stack is controlled to run at a fixed power of 70kW for 1000 hours, and then the current is adjusted to 240A for 1 hour, and the first reference voltage attenuation rate S1 relative to the reference voltage at this time is calculated; the completed new stack is controlled to start and stop the stack repeatedly 100 times, and then the current is adjusted to 240A for 1 hour, and the sixth reference voltage attenuation rate S6 relative to the reference voltage at this time is calculated.

[0071] Then, the low-temperature loss coefficient is determined according to the first reference voltage attenuation rate S1 and the sixth reference voltage attenuation rate S6, and the low-temperature loss coefficient Q5 = (S6 / 100) / (S1 / 1000).

[0072] The calculation process for the emergency stop loss coefficient is as follows.

[0073] First, after controlling the fuel cell to run for a predetermined period of time under a selected vehicle operating condition, such as an emergency stop condition of the fuel cell stack, the first reference voltage decay rate under the fuel cell stack reference current is measured; the fuel cell is controlled to start and stop a predetermined number of times under a low-temperature start-stop condition, and the fuel cell is started to run to the reference current point, and the sixth reference voltage decay rate under the fuel cell stack reference current is measured.

[0074] For example, there is a 120kW fuel cell, a 150kW stack, and a stack output of 85kW as the selected working condition. The current of 240A when the stack outputs 85kW is the reference current point, and the voltage of 345V is the reference voltage, as an example. The completed new stack is controlled to run at a fixed power of 70kW for 1000 hours, and then the current is adjusted to 240A for 1 hour, and the first reference voltage attenuation rate S1 relative to the reference voltage at this time is calculated; the completed new stack is controlled to repeatedly stop the stack 100 times, and then the current is adjusted to 240A for 1 hour, and the sixth reference voltage attenuation rate S6 relative to the reference voltage at this time is calculated.

[0075] Then, the low-temperature loss coefficient is determined according to the first reference voltage attenuation rate S1 and the sixth reference voltage attenuation rate S6, and the emergency stop loss coefficient Q6 = (S6 / 100) / (S1 / 1000).

[0076] The advantage of this setting is that for different vehicle operating conditions, the loss coefficients corresponding to different vehicle operating conditions are determined through different calculation methods, so as to improve the accuracy of subsequent calculation of loss mileage.

[0077] In a specific embodiment, the vehicle battery stack operating data also includes the vehicle's average operating speed; the loss mileage corresponding to all vehicle operating conditions is determined based on the product of all loss coefficients and the vehicle battery stack operating data, including: obtaining the operating time corresponding to all vehicle operating conditions and the vehicle's average operating speed respectively; determining the loss mileage corresponding to all vehicle operating conditions based on the vehicle's average operating speed, the operating time corresponding to all vehicle operating conditions and the product of all loss coefficients.

[0078] In this step, the average running speed of the vehicle can be calculated by the ratio of the vehicle mileage data to the vehicle running time, which is not limited in this embodiment.

[0079] The loss mileage includes the idle loss mileage corresponding to the idle condition of the fuel stack, the high-load loss mileage corresponding to the high-load condition of the fuel stack, the variable load loss mileage corresponding to the variable load condition of the fuel stack, the normal temperature loss mileage corresponding to the normal temperature start and stop condition of the fuel stack, the low temperature loss mileage corresponding to the low temperature start and stop condition of the fuel stack and the emergency stop loss mileage corresponding to the emergency stop condition of the fuel stack.

[0080] Specifically, the loss mileage corresponding to all vehicle operating conditions is determined according to the product of the average vehicle operating speed, the operating time corresponding to all vehicle operating conditions, and all loss coefficients. Idle loss mileage D1=H1Q1V, where H1 represents the operating time corresponding to the idle condition of the stack, Q1 represents the idle loss coefficient, and V represents the average vehicle operating speed. High load loss mileage D2=H2Q2V, where H2 represents the operating time corresponding to the high load condition of the stack, and Q2 represents the high load loss coefficient. Variable load loss mileage D3=A1Q3V, where A1 represents the variable load power span, and Q3 represents the variable load loss coefficient. Normal temperature loss mileage D4=C1Q4V, where C1 represents the number of normal temperature start-stop conditions of the stack, and Q4 represents the normal temperature loss coefficient. Low temperature loss mileage D5=C2Q5V, where C2 represents the number of low temperature start-stop conditions of the stack, and Q5 represents the low temperature loss coefficient. Emergency stop loss mileage D6=C3Q6V, where C3 represents the number of emergency stop conditions of the stack, and Q6 represents the emergency stop loss coefficient. Finally, the vehicle fuel cell loss mileage is determined based on the idle loss mileage corresponding to the stack idle condition, the high load loss mileage corresponding to the stack high load condition, the variable load loss mileage corresponding to the stack variable load condition, the normal temperature loss mileage corresponding to the normal temperature start-stop condition of the stack, the low temperature loss mileage corresponding to the low temperature start-stop condition of the stack, and the emergency stop loss mileage corresponding to the stack emergency stop condition.

[0081] In a specific embodiment, the calculation process of the vehicle fuel cell loss mileage is shown as follows. Specifically, based on the operation time of the stack idle condition, the idle loss mileage of the fuel cell is calculated; based on the operation time of the stack high load condition, the high load loss mileage of the fuel cell is calculated; based on the variable load power span of the stack variable load condition, the variable load loss mileage of the fuel cell is calculated; based on the number of normal temperature start and stop conditions of the stack, the normal temperature loss mileage of the fuel cell is calculated; based on the number of low temperature start and stop conditions of the stack, the low temperature loss mileage of the fuel cell is calculated; based on the number of emergency stop conditions of the stack, the emergency stop loss mileage of the fuel cell is calculated.

[0082] Among them, the loss mileage is an equivalent maintenance mileage of the fuel cell, which converts the actual mileage into the desired maintenance mileage according to the vehicle operating conditions and operating conditions of the fuel cell during operation. Under the idling condition of the stack, the cathode of the stack is at a high potential for a long time, which is prone to oxidation migration and carbon corrosion of the catalyst. These reactions lead to a reduction in the electrochemical active area of ​​the membrane electrode of the key component of the stack, which ultimately affects the output performance of the fuel cell and causes the battery performance to gradually deteriorate. Under the high load condition of the stack, the stack can provide a large current discharge for a short time and can output higher power, but the free radical generation rate increases, causing the proton exchange membrane to decay faster, and may also cause insufficient gas supply or flooding analysis. In some embodiments, after the stack performance has decayed, in order to achieve the preset power, the stack voltage may be further reduced, resulting in a greater impact. In the actual operation of the vehicle, vehicle operating conditions such as climbing-downhill, acceleration-deceleration, and limited power battery recovery require the fuel cell to frequently adjust the external output power, resulting in rapid fluctuations in electrode potential, reaction gas stoichiometry, temperature, pressure, and humidity, which accelerates the aging process of the fuel cell. In some embodiments, the stack output is allowed to fluctuate within the range of ±3% of the specified value, so it is necessary to exclude the influence of the fluctuation value on the judgment of the stack load condition. In some embodiments, the load slope of the stack may be a fixed value except for the emergency stop, or it may be assigned multiple values ​​due to different load power segments, but generally not more than 3. During the start-stop process, it is often necessary to purge the anode electrode and the flow channel by using hydrogen. During the startup phase, this helps to remove impurities that may be mixed with the air. During the shutdown phase, due to the reverse osmosis of air from the cathode to the anode, or the entry of ambient air from the anode outlet into the anode cavity, a hydrogen / air interface may be formed, and the cathode may be affected by the high potential, causing carbon corrosion, which has an adverse effect on the life of the stack. When the fuel cell is operated in a low temperature environment below zero, the water produced by the cathode may freeze in the battery and be difficult to remove, thereby accumulating in the battery. If there is an ice layer inside the stack at startup, it will damage the membrane structure. During shutdown, a more stringent shutdown strategy, especially a long purge process, will make the membrane dry and affect the performance demonstration at the initial startup. The fuel cell stack was not shut down according to the normal shutdown process, and the hydrogen supply, oxygen supply and cooling devices were immediately shut down, resulting in high hydrogen pressure, high air pressure, uncontrolled hydrogen-air pressure difference, excessive temperature, and excessive potential inside the fuel cell stack, which will have serious consequences.

[0083] Step 104: Determine the real-time maintenance mileage of the vehicle fuel cell according to the vehicle fuel cell wear mileage, historical maintenance mileage and current driving mileage.

[0084] In this step, historical maintenance mileage refers to the maintenance record of the current vehicle and the maintenance mileage recommended by the manufacturer or the maintenance manual during the use of the vehicle. This maintenance mileage is a major reference mileage that can help car owners to reasonably arrange maintenance of the fuel cell, even if the recoverable attenuation is restored, thereby improving the economy of the vehicle. The current mileage refers to the vehicle mileage in operation of the fuel cell system from the last maintenance to the present.

[0085] In a specific embodiment, the specific implementation steps of determining the real-time maintenance mileage of the vehicle fuel cell based on the vehicle fuel cell wear mileage, historical maintenance mileage and current driving mileage include: determining the initial maintenance mileage based on the sum of the current driving mileage and the vehicle fuel cell wear mileage; determining the real-time maintenance mileage of the vehicle fuel cell based on the difference between the historical maintenance mileage and the initial maintenance mileage.

[0086] Specifically, first calculate the sum of the idle loss mileage, high-load loss mileage, variable load loss mileage, normal temperature loss mileage, low temperature loss mileage, and emergency stop loss mileage to obtain the vehicle fuel cell loss mileage; then sum the vehicle fuel cell loss mileage and the current driving mileage to obtain the initial maintenance mileage; finally, subtract the initial maintenance mileage from the historical maintenance mileage to obtain the vehicle fuel cell real-time maintenance mileage; further, the vehicle fuel cell real-time maintenance mileage can be displayed on the vehicle's large screen to provide a prompt for the vehicle fuel cell real-time maintenance mileage.

[0087] The advantage of this setting is that it can accurately calculate the real-time maintenance mileage of the vehicle's fuel cell and provide prompts to enhance the user experience.

[0088] The present invention provides a method for determining the maintenance mileage of a fuel cell, by obtaining the vehicle stack operation data, historical maintenance mileage and current mileage; wherein the historical maintenance mileage is the total mileage of the vehicle's historical maintenance, the current mileage refers to the difference between the vehicle's total mileage and the historical maintenance mileage, the vehicle stack operation data is data reflecting the vehicle fuel cell stack status and the vehicle operation status during the vehicle's operation; the vehicle operating condition is determined according to the vehicle stack operation data; wherein the vehicle operating condition is at least one operating condition; the vehicle fuel cell loss mileage is determined according to all vehicle operating conditions and the vehicle stack operation data; the vehicle fuel cell real-time maintenance mileage is determined according to the vehicle fuel cell loss mileage, historical maintenance mileage and current mileage. Based on the above embodiments, the technical solution of the present invention is used to solve the defect that the mileage of the fuel cell cannot be maintained during the operation of the vehicle in the prior art, and realizes the calculation of the loss mileage of the fuel cell under each operating condition based on different vehicle operating conditions, thereby determining the real-time maintenance mileage of the fuel cell based on the loss mileage under each operating condition, mastering the use status of the fuel cell, and improving the safety of the fuel cell during the operation of the vehicle.

[0089] The maintenance mileage determination device for a fuel cell provided by the present invention is described below. The maintenance mileage determination device for a fuel cell described below and the maintenance mileage determination method for a fuel cell described above can be referred to each other.

[0090] Figure 2 is a schematic diagram of the structure of the fuel cell maintenance mileage determination device provided by the present invention, referring to Figure 2 As shown, the maintenance mileage determination device 200 for a fuel cell includes: a data acquisition module 201 , an operating condition determination module 202 , a wear mileage determination module 203 and a maintenance mileage determination module 204 .

[0091] The data acquisition module 201 is used to obtain the vehicle stack operation data, historical maintenance mileage and current mileage; wherein the historical maintenance mileage is the total mileage of the vehicle's historical maintenance, the current mileage refers to the difference between the vehicle's total mileage and the historical maintenance mileage, and the vehicle stack operation data is data that reflects the vehicle's fuel cell stack status and vehicle operation status during the vehicle's operation.

[0092] The operating condition determination module 202 is used to determine the vehicle operating condition based on the vehicle stack operation data; wherein the vehicle operating condition includes at least one of the stack idle condition, the stack high load condition, the stack variable load condition, the stack normal temperature start and stop condition, the stack low temperature start and stop condition and the stack emergency stop condition.

[0093] The wear mileage determination module 203 is used to determine the vehicle fuel cell wear mileage based on all vehicle operating conditions and vehicle stack operation data.

[0094] The maintenance mileage determination module 204 is used to determine the real-time maintenance mileage of the vehicle fuel cell according to the vehicle fuel cell wear mileage, historical maintenance mileage and current driving mileage.

[0095] In an exemplary embodiment, the vehicle stack operation data includes the fuel cell stack voltage, the stack power change slope, and the stack start / stop status.

[0096] In an exemplary embodiment, the operating condition determination module 202 is specifically used to: determine that the vehicle operating condition is a stack idle condition when the fuel cell stack voltage is greater than a first preset voltage; determine that the vehicle operating condition is a stack high load condition when the fuel cell stack voltage is greater than a second preset voltage; wherein the first preset voltage is greater than the second preset voltage; determine that the vehicle operating condition is a stack variable load condition when the stack power change slope is greater than a preset slope; determine that the vehicle operating condition is a normal temperature start-stop condition when the stack start-stop state includes normal start-up at normal temperature and normal shutdown at normal temperature; determine that the vehicle operating condition is a low temperature start-stop condition when the stack start-stop state includes normal start-up at low temperature and normal shutdown at low temperature; determine that the vehicle operating condition is a stack emergency stop condition when the stack start-stop state includes normal start-up and abnormal shutdown.

[0097] In an exemplary embodiment, the loss mileage determination module 203 is specifically used to: determine the loss mileage corresponding to all vehicle operating conditions based on all vehicle operating conditions and vehicle fuel cell operation data; and determine the vehicle fuel cell loss mileage based on the sum of all loss mileages.

[0098] In an exemplary embodiment, the loss mileage determination module 203 determines the loss mileage corresponding to all vehicle operating conditions based on all vehicle operating conditions and vehicle battery stack operating data, and is specifically used to: respectively determine the loss coefficients corresponding to all vehicle operating conditions; respectively determine the loss mileage corresponding to all vehicle operating conditions based on the product of all loss coefficients and the vehicle battery stack operating data.

[0099] In an exemplary embodiment, the loss coefficient includes at least one of an idle loss coefficient, a high load loss coefficient, a variable load loss coefficient, a normal temperature loss coefficient, a low temperature loss coefficient, and an emergency stop loss coefficient.

[0100] In an exemplary embodiment, the loss mileage determination module 203 determines the loss coefficients corresponding to all vehicle operating conditions respectively, and is specifically used for: when the vehicle operating condition is the stack idle condition, the idle loss coefficient Q1=S2 / S1-1; wherein S1 represents the first reference voltage attenuation rate determined after the vehicle fuel cell is controlled to operate at a fixed power at a first power point, S2 represents the second reference voltage attenuation rate determined after the vehicle fuel cell is controlled to operate at a fixed power at a second power point, and the first power point is greater than the second power point; when the vehicle operating condition is the stack high load condition, the high load loss coefficient Q2=S3 / S1-1; wherein S3 represents the third reference voltage attenuation rate determined after the vehicle fuel cell is controlled to operate at a fixed power at a third power point, and the third power point is greater than the first power point; when the vehicle operating condition is the stack variable load condition, the variable load loss coefficient Q3=(S4 / A1) / (S1 / 1000) ; Wherein, S4 represents the fourth reference voltage attenuation rate determined by controlling the vehicle fuel cell to operate between the second power point and the fourth power point, the fourth power point is greater than the third power point, and A1 represents the variable load power span of the vehicle fuel cell; when the vehicle operating condition is the normal temperature start-stop condition of the stack, the normal temperature loss coefficient Q4=(S5 / 100) / (S1 / 1000); wherein, S5 represents the fifth reference voltage attenuation rate determined when the number of repeated starts and stops of the vehicle fuel cell under normal temperature of the stack is equal to the preset number, and the preset number is the pre-set number of starts and stops; when the vehicle operating condition is the low temperature start-stop condition of the stack, the low temperature loss coefficient Q5=(S6 / 100) / (S1 / 1000); wherein, S6 represents the sixth reference voltage attenuation rate determined when the number of repeated starts and stops of the vehicle fuel cell under normal temperature of the stack is equal to the preset number; when the vehicle operating condition is the emergency stop condition of the stack, the emergency stop loss coefficient Q6=(S6 / 100) / (S1 / 1000).

[0101] In an exemplary embodiment, the vehicle stack operation data further includes an average vehicle operation speed.

[0102] In an exemplary embodiment, the loss mileage determination module 203 determines the loss mileage corresponding to all vehicle operating conditions based on the product of all loss coefficients and the vehicle stack operating data, and is specifically used to: obtain the operating time corresponding to all vehicle operating conditions and the average operating speed of the vehicle, respectively; determine the loss mileage corresponding to all vehicle operating conditions based on the average operating speed of the vehicle, the operating time corresponding to all vehicle operating conditions, and the product of all loss coefficients.

[0103] In an exemplary embodiment, the maintenance mileage determination module 204 is specifically used to: determine the initial maintenance mileage according to the sum of the current driving mileage and the vehicle fuel cell wear mileage; determine the vehicle fuel cell real-time maintenance mileage according to the difference between the historical maintenance mileage and the initial maintenance mileage.

[0104] The device of this embodiment can be used to execute the method of any embodiment in the embodiment of the method for determining the maintenance mileage of a fuel cell. Its specific implementation process and technical effects are similar to those in the embodiment of the method for determining the maintenance mileage of a fuel cell. For details, please refer to the detailed description in the embodiment of the method for determining the maintenance mileage of a fuel cell, which will not be repeated here.

[0105] Figure 3 is a schematic diagram of the structure of the electronic device provided by the present invention, such as Figure 3 As shown, the electronic device may include: a processor 310 , a communications interface 320 , a memory 330 and a communication bus 340 , wherein the processor 310 , the communications interface 320 , and the memory 330 communicate with each other via the communication bus 340 . The processor 310 can call the logic instructions in the memory 330 to execute the maintenance mileage determination method of the fuel cell, which method includes: obtaining the vehicle stack operation data, historical maintenance mileage and current mileage; wherein the historical maintenance mileage is the total mileage of the vehicle's historical maintenance, the current mileage refers to the difference between the vehicle's total mileage and the historical maintenance mileage, and the vehicle stack operation data is data that reflects the vehicle fuel cell stack status and the vehicle operation status during the operation of the vehicle; determining the vehicle operating condition based on the vehicle stack operation data; wherein the vehicle operating condition includes at least one of the stack idle condition, the stack high load condition, the stack variable load condition, the stack normal temperature start and stop condition, the stack low temperature start and stop condition and the stack emergency stop condition; determining the vehicle fuel cell wear mileage based on all vehicle operating conditions and the vehicle stack operation data; determining the vehicle fuel cell real-time maintenance mileage based on the vehicle fuel cell wear mileage, historical maintenance mileage and current mileage.

[0106] In addition, the logic instructions in the above-mentioned memory 330 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods of various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0107] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the fuel cell maintenance mileage determination method provided by the above methods, the method including: obtaining vehicle stack operation data, historical maintenance mileage and current mileage; wherein the historical maintenance mileage is the total mileage of the vehicle's historical maintenance, the current mileage refers to the difference between the vehicle's total mileage and the historical maintenance mileage, and the vehicle stack operation data is data that reflects the vehicle fuel cell stack status and the vehicle operation status during the operation of the vehicle; determining the vehicle operating condition based on the vehicle stack operation data; wherein the vehicle operating condition includes at least one of the stack idle condition, the stack high load condition, the stack variable load condition, the stack normal temperature start-stop condition, the stack low temperature start-stop condition and the stack emergency stop condition; determining the vehicle fuel cell wear mileage based on all vehicle operating conditions and the vehicle stack operation data; determining the vehicle fuel cell real-time maintenance mileage based on the vehicle fuel cell wear mileage, historical maintenance mileage and current mileage.

[0108] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the maintenance mileage determination method for a fuel cell provided by the above-mentioned methods, the method comprising: obtaining vehicle stack operation data, historical maintenance mileage and current mileage; wherein the historical maintenance mileage is the total mileage of the vehicle's historical maintenance, the current mileage refers to the difference between the vehicle's total mileage and the historical maintenance mileage, and the vehicle stack operation data is data reflecting the vehicle fuel cell stack condition and the vehicle operation status during the operation of the vehicle; determining the vehicle operating condition based on the vehicle stack operation data; wherein the vehicle operating condition includes at least one of the stack idling condition, the stack high load condition, the stack variable load condition, the stack normal temperature start-stop condition, the stack low temperature start-stop condition and the stack emergency stop condition; determining the vehicle fuel cell wear mileage based on all vehicle operating conditions and the vehicle stack operation data; determining the vehicle fuel cell real-time maintenance mileage based on the vehicle fuel cell wear mileage, historical maintenance mileage and current mileage.

[0109] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0110] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining the maintenance mileage of a fuel cell, characterized in that: include: Obtaining the vehicle's fuel cell stack operation data, historical maintenance mileage, and current mileage; wherein the historical maintenance mileage is the total mileage of the vehicle's historical maintenance, the current mileage is the difference between the vehicle's total mileage and the historical maintenance mileage, and the vehicle's fuel cell stack operation data is data reflecting the vehicle's fuel cell stack status and vehicle operation status during operation; The vehicle operating condition is determined according to the vehicle stack operating data; wherein the vehicle operating condition includes at least one of the stack idling condition, the stack high load condition, the stack variable load condition, the stack normal temperature start-stop condition, the stack low temperature start-stop condition and the stack emergency stop condition; the vehicle stack operating data includes the fuel cell stack voltage, the stack power change slope and the stack start-stop state; the vehicle operating condition is determined according to the vehicle stack operating data, including: when the fuel cell stack voltage is greater than a first preset voltage, determining that the vehicle operating condition is the stack idling condition; when the fuel cell stack voltage is greater than a second preset voltage, determining that the vehicle The operating condition is the high-load operating condition of the battery stack; wherein the first preset voltage is greater than the second preset voltage; when the slope of the power change of the battery stack is greater than the preset slope, the vehicle operating condition is determined to be the variable-load operating condition of the battery stack; when the start-stop state of the battery stack includes normal start-up at normal temperature and normal shutdown at normal temperature, the vehicle operating condition is determined to be the normal-temperature start-stop operating condition of the battery stack; when the start-stop state of the battery stack includes normal start-up at low temperature and normal shutdown at low temperature, the vehicle operating condition is determined to be the low-temperature start-stop operating condition of the battery stack; when the start-stop state of the battery stack includes normal start-up and abnormal shutdown, the vehicle operating condition is determined to be the emergency stop operating condition of the battery stack; Determine the vehicle fuel cell loss mileage according to all the vehicle operating conditions and the vehicle fuel cell stack operation data; The vehicle fuel cell real-time maintenance mileage is determined according to the vehicle fuel cell wear mileage, the historical maintenance mileage and the current driving mileage.

2. The method for determining the maintenance mileage of a fuel cell according to claim 1, characterized in that: The determining of the vehicle fuel cell loss mileage according to all the vehicle operating conditions and the vehicle fuel cell stack operation data includes: Determine the loss mileage corresponding to all the vehicle operating conditions according to all the vehicle operating conditions and the vehicle battery stack operation data; The vehicle fuel cell wear mileage is determined based on the sum of all the wear mileages.

3. The method for determining the maintenance mileage of a fuel cell according to claim 2, characterized in that: The determining the loss mileage corresponding to all the vehicle operating conditions according to all the vehicle operating conditions and the vehicle battery stack operation data includes: respectively determining the loss coefficients corresponding to all the vehicle operating conditions; The loss mileage corresponding to all the vehicle operating conditions is determined according to the product of all the loss coefficients and the vehicle stack operating data.

4. The method for determining the maintenance mileage of a fuel cell according to claim 3, characterized in that: The loss coefficient includes at least one of an idle loss coefficient, a high load loss coefficient, a variable load loss coefficient, a normal temperature loss coefficient, a low temperature loss coefficient and an emergency stop loss coefficient; the loss coefficients corresponding to all the vehicle operating conditions are determined respectively, including: When the vehicle operating condition is the stack idle condition, the idle loss coefficient Q1=S2 / S1-1; wherein S1 represents a first reference voltage attenuation rate determined after controlling the vehicle fuel cell to operate at a fixed power at a first power point, and S2 represents a second reference voltage attenuation rate determined after controlling the vehicle fuel cell to operate at a fixed power at a second power point, and the first power point is greater than the second power point; When the vehicle operating condition is the high-load operating condition of the fuel cell stack, the high-load loss coefficient Q2=S3 / S1-1; wherein S3 represents the third reference voltage attenuation rate determined after controlling the vehicle fuel cell to operate at a fixed power at a third power point, and the third power point is greater than the first power point; When the vehicle operating condition is the variable load condition of the fuel cell stack, the variable load loss coefficient Q3=(S4 / A1) / (S1 / 1000); wherein S4 represents the fourth reference voltage attenuation rate determined by controlling the vehicle fuel cell to operate between the second power point and the fourth power point, the fourth power point is greater than the third power point, and A1 represents the variable load power span of the vehicle fuel cell; When the vehicle operating condition is the normal temperature start-stop condition of the stack, the normal temperature loss coefficient Q4=(S5 / 100) / (S1 / 1000); wherein S5 represents the fifth reference voltage attenuation rate determined when the number of repeated starts and stops of the vehicle fuel cell under the normal temperature condition of the stack is equal to the preset number, and the preset number is the preset number of starts and stops; When the vehicle operating condition is the low-temperature start-stop condition of the stack, the low-temperature loss coefficient Q5=(S6 / 100) / (S1 / 1000); wherein S6 represents the sixth reference voltage attenuation rate determined when the number of repeated starts and stops of the vehicle fuel cell is equal to the preset number of times under the condition of normal stack temperature; When the vehicle operating condition is the battery stack emergency stop condition, the emergency stop loss coefficient Q6=(S6 / 100) / (S1 / 1000).

5. The method for determining the maintenance mileage of a fuel cell according to claim 4, characterized in that: The vehicle stack operation data also includes an average vehicle operating speed; and determining the loss mileage corresponding to all the vehicle operating conditions according to the product of all the loss coefficients and the vehicle stack operation data, respectively, includes: Respectively obtain the running time and the average running speed of the vehicle corresponding to all the vehicle operating conditions; The loss mileage corresponding to all the vehicle operating conditions is determined according to the average operating speed of the vehicle, the operating time corresponding to all the vehicle operating conditions and the product of all the loss coefficients.

6. The method for determining the maintenance mileage of a fuel cell according to claim 1, characterized in that: The determining of the vehicle fuel cell real-time maintenance mileage according to the vehicle fuel cell wear mileage, the historical maintenance mileage and the current driving mileage includes: Determining an initial maintenance mileage based on the sum of the current driving mileage and the vehicle fuel cell wear mileage; The real-time maintenance mileage of the vehicle fuel cell is determined according to the difference between the historical maintenance mileage and the initial maintenance mileage.

7. A fuel cell maintenance mileage determination device, characterized in that: include: A data acquisition module, used to acquire vehicle fuel cell stack operation data, historical maintenance mileage and current mileage; wherein the historical maintenance mileage is the total mileage of the vehicle's historical maintenance, the current mileage refers to the difference between the vehicle's total mileage and the historical maintenance mileage, and the vehicle fuel cell stack operation data is data reflecting the vehicle fuel cell stack status and vehicle operation status during vehicle operation; The operating condition determination module is used to determine the vehicle operating condition according to the vehicle stack operating data; wherein the vehicle operating condition includes at least one of the stack idling condition, the stack high load condition, the stack variable load condition, the stack normal temperature start-stop condition, the stack low temperature start-stop condition and the stack emergency stop condition; the vehicle stack operating data includes the fuel cell stack voltage, the stack power change slope and the stack start-stop state; the determining the vehicle operating condition according to the vehicle stack operating data includes: when the fuel cell stack voltage is greater than a first preset voltage, determining that the vehicle operating condition is the stack idling condition; when the fuel cell stack voltage is greater than a second preset voltage, determining that The vehicle operating condition is determined to be the high-load operating condition of the battery stack; wherein the first preset voltage is greater than the second preset voltage; when the slope of the power change of the battery stack is greater than the preset slope, the vehicle operating condition is determined to be the variable-load operating condition of the battery stack; when the start-stop state of the battery stack includes normal start-up at normal temperature and normal shutdown at normal temperature, the vehicle operating condition is determined to be the normal-temperature start-stop operating condition of the battery stack; when the start-stop state of the battery stack includes normal start-up at low temperature and normal shutdown at low temperature, the vehicle operating condition is determined to be the low-temperature start-stop operating condition of the battery stack; when the start-stop state of the battery stack includes normal start-up and abnormal shutdown, the vehicle operating condition is determined to be the emergency stop operating condition of the battery stack; A wear mileage determination module, used to determine the vehicle fuel cell wear mileage according to all the vehicle operating conditions and the vehicle fuel cell stack operation data; The maintenance mileage determination module is used to determine the real-time maintenance mileage of the vehicle fuel cell according to the vehicle fuel cell wear mileage, the historical maintenance mileage and the current driving mileage.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the method for determining the maintenance mileage of a fuel cell according to any one of claims 1 to 6 is implemented.

9. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for determining the maintenance mileage of a fuel cell according to any one of claims 1 to 6 is implemented.

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