A method, device, equipment and medium for correcting the working power of a fuel cell

Abstract

An embodiment of the present invention provides a method, device, equipment and medium for correcting the working power of a fuel cell. The correction method can determine the first correction coefficient corresponding to the acquired SOC value of the power battery at the second moment and the SOC change rate of the power battery based on the correspondence between the preset SOC value, the SOC change rate and the first correction coefficient, and correct the working power of the fuel cell according to the first correction coefficient. This allows the working power of the fuel cell to be flexibly and dynamically adjusted, thereby increasing the life of the fuel cell.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cells, and in particular to a method, device, equipment and medium for correcting the working power of a fuel cell. Background Art

[0002] In the fuel cell power system of current vehicles, the operating power of the fuel cell is determined by power calibration through calibration control software, that is, the operating power of the fuel cell is a fixed value.

[0003] However, during the operation of the vehicle, different road conditions will be encountered. A fixed calibration value cannot adapt to different road conditions, resulting in high hydrogen consumption of the vehicle, frequent start and stop of the fuel cell engine, unstable state of charge (SOC) value of the power battery, and frequent charging and discharging of the fuel cell for the power battery, which will affect the life of the power battery and fuel cell. Summary of the invention

[0004] The embodiments of the present invention provide a method, device, equipment and medium for correcting the operating power of a fuel cell, so as to increase the service life of the fuel cell.

[0005] In a first aspect, an embodiment of the present invention provides a method for correcting the operating power of a fuel cell, comprising:

[0006] After the power battery and the fuel cell are both in working state, determining the SOC change rate of the power battery based on the acquired SOC value of the power battery at the first moment and the SOC value of the power battery at the second moment, wherein the second moment is later than the first moment;

[0007] Determining the first correction coefficient corresponding to the acquired SOC value of the power battery at the second moment and the SOC change rate of the power battery based on a preset correspondence relationship among the SOC value, the SOC change rate and the first correction coefficient;

[0008] The operating power of the fuel cell is corrected based on the first correction coefficient.

[0009] Optionally, after correcting the operating power of the fuel cell based on the first correction coefficient, the method further includes:

[0010] If it is determined that the acquired SOC value of the power battery at the second moment is within the set SOC value range, and the SOC change rate of the power battery is within the set SOC change rate range, then based on the relationship between the charge and discharge amounts of the power battery in a preset time period before the second moment, a secondary correction is performed on the operating power of the fuel cell.

[0011] Optionally, the performing a secondary correction on the operating power of the fuel cell based on the relationship between the charge amount and the discharge amount of the power battery in a preset time period before the second moment includes:

[0012] If the charge amount of the power battery in the preset time period before the second moment is less than the discharge amount, increasing the working power of the fuel cell;

[0013] If the charge amount of the power battery in a preset time period before the second moment is greater than the discharge amount, the operating power of the fuel cell is reduced.

[0014] Optionally, the charge and discharge amounts of the power battery in a preset time period before the second moment are calculated in the following manner:

[0015] Determining the charge amount based on the preset time period and the voltage and charging current of the power battery at multiple times within the preset time period;

[0016] The discharge amount is determined based on the preset time period and the voltage and discharge current of the power battery at multiple moments in the preset time period.

[0017] Optionally, the method further includes:

[0018] If the corrected operating power of the fuel cell is greater than the maximum allowable power of the fuel cell, the maximum allowable power of the fuel cell is used as the corrected operating power of the fuel cell.

[0019] In a second aspect, an embodiment of the present invention further provides a device for correcting the operating power of a fuel cell, comprising:

[0020] An SOC change rate determining unit, configured to determine the SOC change rate of the power battery based on an acquired power battery state of charge SOC value at a first moment and an acquired power battery SOC value at a second moment after both the power battery and the fuel cell are in an operating state, wherein the second moment is later than the first moment;

[0021] a first correction coefficient determination unit, configured to determine a first correction coefficient corresponding to the acquired power battery SOC value at the second moment and the SOC change rate of the power battery based on a preset correspondence relationship among the SOC value, the SOC change rate and the first correction coefficient;

[0022] The first correction unit is used to correct the operating power of the fuel cell based on the first correction coefficient.

[0023] Optionally, it further includes: a second correction unit;

[0024] The second correction unit is used to perform a secondary correction on the operating power of the fuel cell based on the relationship between the charge and discharge amounts of the power battery in a preset time period before the second moment, if it is determined that the acquired SOC value of the power battery at the second moment is within a set SOC value range, and the SOC change rate of the power battery is within a set SOC change rate range.

[0025] Optionally, the second correction unit is specifically used to:

[0026] If the charge amount of the power battery in the preset time period before the second moment is less than the discharge amount, increasing the working power of the fuel cell;

[0027] If the charge amount of the power battery in a preset time period before the second moment is greater than the discharge amount, the operating power of the fuel cell is reduced.

[0028] Optionally, the charge and discharge amounts of the power battery in a preset time period before the second moment are calculated in the following manner:

[0029] Determining the charge amount based on the preset time period and the voltage and charging current of the power battery at multiple times within the preset time period;

[0030] The discharge amount is determined based on the preset time period and the voltage and discharge current of the power battery at multiple moments in the preset time period.

[0031] Optionally, if the corrected operating power of the fuel cell is greater than the maximum allowable power of the fuel cell, the maximum allowable power of the fuel cell is used as the corrected operating power of the fuel cell.

[0032] In a third aspect, an embodiment of the present invention further provides an electronic device, including a memory and a processor;

[0033] The memory is used to store instructions;

[0034] The processor is used to execute instructions stored in the memory. When the processor executes the instructions stored in the memory, the electronic device executes the method as described in any one of the first aspects.

[0035] In a fourth aspect, an embodiment of the present invention further provides a computer storage medium, wherein instructions are stored in the computer storage medium, and when the instructions are executed on a computer, the computer is caused to execute the method as described in any one of the first aspects.

[0036] An embodiment of the present invention provides a method, device, equipment and medium for correcting the working power of a fuel cell. The correction method can determine the first correction coefficient corresponding to the acquired SOC value of the power battery at the second moment and the SOC change rate of the power battery based on the correspondence between the preset SOC value, the SOC change rate and the first correction coefficient, and correct the working power of the fuel cell according to the first correction coefficient. This allows the working power of the fuel cell to be flexibly and dynamically adjusted, thereby increasing the life of the fuel cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A schematic flow chart of a method for correcting the operating power of a fuel cell provided in an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of the structure of a fuel cell operating power correction device provided by an embodiment of the present invention;

[0040] Figure 3 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of this application.

[0042] In current new energy vehicles, the power sources of the fuel cell power system are fuel cells and power batteries. The two power sources jointly provide energy sources for the entire vehicle. The two energy distribution methods have a great impact on the vehicle's power, economy, and the life of the fuel cell and power battery. Among them, the fuel cell can convert chemical energy into electrical energy by consuming hydrogen energy. The fuel cell can directly provide energy to the entire vehicle, and can also charge the power battery to provide energy to the entire vehicle. At present, the working power of the fuel cell is realized by the calibration value in the calibration control software, that is, the working power of the fuel cell is a fixed value, but when the vehicle is running, it will encounter different working conditions. Due to different vehicle operating areas and routes, the same calibration value cannot adapt to different operating conditions, resulting in high hydrogen consumption of the vehicle, frequent start and stop of the fuel cell engine, and the state of charge (SOC) value of the power battery deviating from the appropriate range, affecting the life of the fuel cell and power battery.

[0043] In order to improve the life of a fuel cell, an embodiment of the present invention provides a method for correcting the operating power of a fuel cell, such as Figure 1 As shown, the method includes:

[0044] S101, after the power battery and the fuel cell are both in working state, determining the SOC change rate of the power battery based on the acquired SOC value of the power battery at a first moment and the SOC value of the power battery at a second moment, wherein the second moment is later than the first moment;

[0045] S102, determining a first correction coefficient corresponding to the acquired SOC value of the power battery at the second moment and the SOC change rate of the power battery based on a preset correspondence relationship among the SOC value, the SOC change rate and the first correction coefficient;

[0046] S103: Correct the operating power of the fuel cell based on the first correction coefficient.

[0047] The method for correcting the operating power of a fuel cell provided in an embodiment of the present invention can determine the first correction coefficient corresponding to the acquired SOC value of the power battery at the second moment and the SOC change rate of the power battery based on the correspondence between the preset SOC value, the SOC change rate and the first correction coefficient, and correct the operating power of the fuel cell according to the first correction coefficient. This allows the operating power of the fuel cell to be flexibly and dynamically adjusted, thereby increasing the life of the fuel cell.

[0048] In a specific implementation, the corresponding relationship between the preset SOC value, the SOC change rate and the first correction coefficient may be as shown in Table 1 and Table 2 below:

[0049] Table 1

[0050]

[0051] First, as shown in Table 1, the SOC value of the power battery is segmented, and 7 range segments are defined according to the size of the SOC value, which can be defined as 7 fixed parameter values ​​(A1-A7). For example, when the SOC value of the power battery is 65%, according to Table 1, the value 65% belongs to the A4 range segment; when the SOC value of the power battery is 71%, according to Table 1, the value 71% belongs to the A5 range segment.

[0052] Table 2

[0053]

[0054] Then, as shown in Table 2, the first correction coefficient coff1 is calibrated according to the fixed parameter value of the power battery SOC change rate and the SOC segment. The calibration principle is that the lower the SOC segment and the smaller the SOC change rate, the larger the first correction coefficient coff1, and the higher the SOC segment and the larger the SOC change rate, the smaller the first correction coefficient coff1. According to the current power battery SOC value, the fixed parameter value of the SOC segment is obtained from Table 1, and then according to the fixed parameter value and the SOC change rate, the first correction coefficient coff1 is obtained from Table 2.

[0055] For example, the SOC value of the power battery at the current moment is 75% (belonging to A5), and the SOC change rate of the power battery at the current moment is 3%. According to Table 2, the first correction coefficient coff1 corresponding to A5 and 3% is 0.8. Therefore, the working power of the fuel cell is corrected based on the first correction coefficient coff1 (that is, 0.8). For example, if the current working power of the fuel cell is 100kw, the corrected power is 100*0.8=80kw, so that the working power of the fuel cell can be reduced according to the actual working conditions.

[0056] In a specific implementation, when determining the SOC change rate of the power battery, the SOC change rate of the power battery is determined based on the acquired power battery state of charge SOC value at the first moment and the power battery SOC value at the second moment. Specifically, the power battery SOC value can be continuously collected, and the power battery SOC value at the moment T1 is recorded as SOC1, and the power battery SOC value at the moment T2 is recorded as SOC2. The SOC change rate of the power battery is (SOC2-SOC1) / (T2-T1). If the power battery change rate is a positive value, it means that the average working power of the fuel cell is higher than the required power value of the whole vehicle. The greater the change rate, the greater the current average working power of the fuel cell; if the power battery change rate is a negative value, it means that the average working power of the fuel cell is lower than the required power value of the whole vehicle. The greater the absolute value of the change rate, the smaller the current average working power of the fuel cell.

[0057] In a specific implementation, the method for correcting the operating power of a fuel cell provided in an embodiment of the present invention can perform a secondary correction after correcting the operating power of the fuel cell using a first correction coefficient to further improve the correction effect, thereby further improving the life of the fuel cell.

[0058] Specifically, after the working power of the fuel cell is corrected based on the first correction coefficient, it also includes: if it is determined that the SOC value of the power battery at the second moment is within the set SOC value range, and the SOC change rate of the power battery is within the set SOC change rate range, then based on the relationship between the charge and discharge amounts of the power battery in a preset time period before the second moment, a second correction is made to the working power of the fuel cell.

[0059] Among them, the charge amount and discharge amount of the power battery in a preset time period before the second moment are calculated in the following manner: based on the preset time period and the voltage and charging current of the power battery at multiple moments in the preset time period, the charge amount is determined; based on the preset time period and the voltage and discharge current of the power battery at multiple moments in the preset time period, the discharge amount is determined.

[0060] Set the preset time period to T, for example, 10 minutes, and continuously collect the discharge current I1, charging current I2 and voltage U of the power battery, for example, once every 1 second, and calculate the power battery discharge amount Q1 and power battery charge amount Q2 within a period of time T. The calculation method of Q1 and Q2 is as follows:

[0061]

[0062]

[0063] Assuming that the discharge current is positive and the charge current is negative, the power battery throughput W is Q1-Q2. The larger the value, the more power the battery is charged and discharged, and the more parasitic energy consumption is generated during the operation of the power battery (because the power battery is charged and then discharged with charging efficiency and discharge efficiency), which is more unfavorable to the economy of the vehicle. The greater the power battery SOC change rate, the greater the power battery throughput. Therefore, in actual work, the power battery SOC change rate should be reduced as much as possible. On the one hand, it ensures that the power battery works in a better area to ensure the charge and discharge performance, while reducing the number of charge and discharge times to increase the life; on the other hand, it reduces the parasitic energy consumption caused by the current entering the power battery.

[0064] Determine that the SOC value of the power battery at the second moment obtained is within the set range of the SOC value, and the SOC change rate of the power battery is within the set range of the SOC change rate. This process can be calibrated according to the actual situation of the battery. For example, a certain model of power battery is specified according to its performance and operation requirements. The SOC value should be within the range of 71%-80%, that is, within the range of A5 with a fixed parameter value, and the SOC change rate should be between -1%-1%. When the power battery is corrected for the first time, the SOC value is within the range of A5, and the SOC change rate is between -1%-1%. According to the relationship between the charge and discharge amounts of the power battery in the preset time period before the second moment, the working power of the fuel cell is corrected for the second time.

[0065] Specifically, if the charge amount of the power battery in the preset time period before the second moment is less than the discharge amount, the working power of the fuel cell is increased; if the charge amount of the power battery in the preset time period before the second moment is greater than the discharge amount, the working power of the fuel cell is reduced.

[0066] For example, within 10 minutes before time T2, if the charge amount Q2 of the power battery is less than the discharge amount Q1, the working power of the fuel cell is increased, for example, it can be increased by 2% based on the working power corrected by the first correction coefficient; if the charge amount Q2 of the power battery is greater than the discharge amount Q1, the working power of the fuel cell is reduced, for example, it can be reduced by 2% based on the working power corrected by the first correction coefficient. At this time, since the SOC change rate is close to 0%, only a slight correction is required. The specific value of increasing or decreasing the working power of the fuel cell can be set in other ways, and no limitation is made here. Through the secondary correction, the participation of the power battery can be further reduced, the parasitic energy consumption of the power battery can be reduced, and the economy can be improved.

[0067] In a specific implementation, if the corrected fuel cell operating power is greater than the maximum allowable power of the fuel cell, the maximum allowable power of the fuel cell is used as the corrected fuel cell operating power. This ensures that the corrected fuel cell operating power does not exceed its maximum allowable power, thereby ensuring the safety of the fuel cell operation.

[0068] Based on the same inventive concept, the embodiment of the present invention also provides a device for correcting the working power of a fuel cell. The implementation of the device can refer to the implementation of the above method, and the repeated parts will not be repeated. Figure 2 As shown, the device comprises:

[0069] An SOC change rate determination unit 201 is used to determine the SOC change rate of the power battery based on an acquired power battery state of charge SOC value at a first moment and an acquired power battery SOC value at a second moment after both the power battery and the fuel cell are in a working state, wherein the second moment is later than the first moment;

[0070] A first correction coefficient determination unit 202, configured to determine a first correction coefficient corresponding to the acquired power battery SOC value at the second moment and the SOC change rate of the power battery based on a preset correspondence relationship among the SOC value, the SOC change rate and the first correction coefficient;

[0071] The first correction unit 203 is used to correct the operating power of the fuel cell based on the first correction coefficient.

[0072] Optionally, it also includes a second correction unit;

[0073] The second correction unit is used to perform a secondary correction on the operating power of the fuel cell based on the relationship between the charge and discharge amounts of the power battery in a preset time period before the second moment, if it is determined that the SOC value of the power battery at the second moment is within the set SOC value range, and the SOC change rate of the power battery is within the set SOC change rate range.

[0074] Optionally, the second correction unit is specifically used for:

[0075] If the charge amount of the power battery in the preset time period before the second moment is less than the discharge amount, increasing the working power of the fuel cell;

[0076] If the charge amount of the power battery in the preset time period before the second moment is greater than the discharge amount, the operating power of the fuel cell is reduced.

[0077] Optionally, the charge and discharge amounts of the power battery in a preset time period before the second moment are calculated in the following manner:

[0078] Determine the charge capacity based on a preset time period and the voltage and charging current of the power battery at multiple times within the preset time period;

[0079] The discharge amount is determined based on a preset time period and the voltage and discharge current of the power battery at multiple times within the preset time period.

[0080] Optionally, if the corrected operating power of the fuel cell is greater than the maximum allowable power of the fuel cell, the maximum allowable power of the fuel cell is used as the corrected operating power of the fuel cell.

[0081] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, the implementation of which can refer to the implementation of the above method, and the repeated parts will not be repeated. Figure 3 As shown, the electronic device includes a memory 301 and a processor 302;

[0082] The memory 301 is used to store instructions;

[0083] The processor 302 is used to execute the instructions stored in the memory 301. When the processor 302 executes the instructions stored in the memory 301, the electronic device executes any one of the above-mentioned methods for correcting the operating power of the fuel cell.

[0084] Furthermore, an embodiment of the present invention also provides a computer storage medium, wherein instructions are stored in the computer storage medium, and when the instructions are executed on a computer, the computer executes any of the above-mentioned methods for correcting the operating power of a fuel cell.

[0085] An embodiment of the present invention provides a method, device, equipment and medium for correcting the working power of a fuel cell. The correction method can determine the first correction coefficient corresponding to the acquired SOC value of the power battery at the second moment and the SOC change rate of the power battery based on the correspondence between the preset SOC value, the SOC change rate and the first correction coefficient, and correct the working power of the fuel cell according to the first correction coefficient. This allows the working power of the fuel cell to be flexibly and dynamically adjusted, thereby increasing the life of the fuel cell.

[0086] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0087] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0088] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0089] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0090] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for correcting the operating power of a fuel cell, characterized in that: include: After the power battery and the fuel cell are both in working state, determining the SOC change rate of the power battery based on the acquired SOC value of the power battery at the first moment and the SOC value of the power battery at the second moment, wherein the second moment is later than the first moment; Determine the SOC value range to which the SOC value of the power battery at the second moment belongs, and determine the first correction coefficient corresponding to the acquired SOC value range and the SOC change rate of the power battery based on the correspondence between the preset range, the SOC change rate and the first correction coefficient, wherein the lower the range and the smaller the SOC change rate, the larger the first correction coefficient, and the higher the range and the larger the SOC change rate, the smaller the first correction coefficient; The operating power of the fuel cell is corrected based on the first correction coefficient.

2. The method according to claim 1, characterized in that After the operating power of the fuel cell is corrected based on the first correction coefficient, the method further includes: If it is determined that the acquired SOC value of the power battery at the second moment is within the set range of the SOC value, and the SOC change rate of the power battery is within the set range of the SOC change rate, then when the charge amount of the power battery in the preset time period before the second moment is less than the discharge amount, the operating power of the fuel cell is increased; when the charge amount of the power battery in the preset time period before the second moment is greater than the discharge amount, the operating power of the fuel cell is reduced.

3. The method according to claim 2, characterized in that The charge and discharge amounts of the power battery in a preset time period before the second moment are calculated in the following manner: Determining the charge amount based on the preset time period and the voltage and charging current of the power battery at multiple times within the preset time period; The discharge amount is determined based on the preset time period and the voltage and discharge current of the power battery at multiple moments in the preset time period.

4. The method according to any one of claims 1 to 3, characterized in that: The method further comprises: If the corrected operating power of the fuel cell is greater than the maximum allowable power of the fuel cell, the maximum allowable power of the fuel cell is used as the corrected operating power of the fuel cell.

5. A device for correcting the operating power of a fuel cell, characterized in that: include: An SOC change rate determining unit, configured to determine the SOC change rate of the power battery based on an acquired power battery state of charge SOC value at a first moment and an acquired power battery SOC value at a second moment after both the power battery and the fuel cell are in an operating state, wherein the second moment is later than the first moment; a first correction coefficient determination unit, configured to determine the SOC value range segment to which the SOC value of the power battery at the second moment belongs, and determine the first correction coefficient corresponding to the acquired SOC value range segment and the SOC change rate of the power battery based on a predetermined correspondence relationship among the range segment, the SOC change rate and the first correction coefficient, wherein the lower the range segment and the smaller the SOC change rate, the larger the first correction coefficient, and the higher the range segment and the larger the SOC change rate, the smaller the first correction coefficient; The first correction unit is used to correct the operating power of the fuel cell based on the first correction coefficient.

6. The device according to claim 5, characterized in that Also includes: Second revision unit; The second correction unit is used to increase the operating power of the fuel cell when the charge amount of the power battery in the preset time period before the second moment is less than the discharge amount, if it is determined that the acquired SOC value of the power battery at the second moment is within the SOC value setting range, and the SOC change rate of the power battery is within the SOC change rate setting range, and reduce the operating power of the fuel cell when the charge amount of the power battery in the preset time period before the second moment is greater than the discharge amount.

7. An electronic device, characterized in that: including memory and processor; The memory is used to store instructions; The processor is used to execute the instructions stored in the memory. When the processor executes the instructions stored in the memory, the electronic device executes the method according to any one of claims 1 to 4.

8. A computer storage medium, characterized in that: The computer storage medium stores instructions, which, when executed on a computer, enable the computer to execute the method according to any one of claims 1 to 4.

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