CN113497261B - Method and device for determining output power of fuel cell - Google Patents

Abstract

The invention discloses a method and device for determining the output power of a fuel cell. The method includes determining the working temperature to be reached by the electric stack of the fuel cell; screening the target current loading rate matched with the working temperature; Pull the current of the fuel cell at a high rate to obtain the voltage corresponding to the real-time current; judge whether the difference between the voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference, if so, determine the stable output power of the fuel cell, and judge the stable output power Whether it is greater than or equal to the preset maximum output power of the fuel cell at the working temperature; if so, determine that the stable output power is the maximum output power; adjust the working temperature, and trigger an operation to maintain the working temperature. It can be seen that the present invention improves the power distribution accuracy of the vehicle under different working conditions by determining the optimal power output capabilities corresponding to different temperatures in different temperature ranges, thereby improving the utilization rate of the fuel cell and improving the working efficiency of the vehicle.

Description

A method and device for determining the output power of a fuel cell

technical field

The invention relates to the technical field of fuel cells, in particular to a method and device for determining the output power of a fuel cell.

Background technique

A fuel cell is a power generation device that directly converts the chemical energy present in fuel and oxidant into electrical energy. With the rapid development of the new energy vehicle industry, fuel cells have become one of the important technical directions of new energy vehicles. Since the current fuel cell and power battery jointly provide power for the vehicle, the distribution of power output is very important for the vehicle.

Practice has found that the temperature (including the temperature of the environment where the fuel cell stack is located and the body temperature of the fuel cell stack) has a great influence on the power output capability of the fuel cell. big difference. Therefore, how to determine the optimal power output capability of the fuel cell at different temperatures, so as to improve the accuracy of power distribution of the vehicle under different operating conditions, and thus improve the utilization of the fuel cell has become an urgent technical problem to be solved.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method and device for determining the output power of a fuel cell, which can determine the optimal power output capability of the fuel cell corresponding to different temperatures in different temperature ranges, thereby improving the performance of the vehicle under different working conditions. The accuracy of power distribution can improve the utilization rate of fuel cells.

In order to solve the above technical problems, the first aspect of the embodiment of the present invention discloses a method for determining the output power of a fuel cell, the method comprising:

Determine the working temperature that the electric stack of the fuel cell needs to reach, and maintain the working temperature, the working temperature includes the water temperature at the inlet of the electric stack and the ambient temperature of the environmental box where the electric stack is located;

Select a target current loading rate that matches the operating temperature from a set of predetermined current loading rates, and load the real-time current of the fuel cell based on the target current loading rate, and obtain the real-time The real-time voltage corresponding to the current;

judging whether the voltage difference between the real-time voltage and the preset voltage single-low threshold is less than or equal to the preset voltage difference, and determining whether the voltage difference of the fuel cell is less than or equal to the preset voltage difference Stabilizing the output power, and judging whether the stable output power is greater than or equal to the preset maximum output power of the fuel cell at the operating temperature;

When it is determined that the stable output power is greater than or equal to the preset maximum output power, determine that the stable output power is the maximum output power of the fuel cell at the operating temperature;

Adjusting the working temperature, and triggering the execution of the operation of maintaining the working temperature.

It can be seen that the first aspect of the present invention can improve the power distribution accuracy of the vehicle under different working conditions by determining the optimal power output capability corresponding to different temperatures in different temperature ranges, thereby improving the utilization rate of the fuel cell and improving the working efficiency of the vehicle. Efficiency; it can also improve the possibility and reliability of fuel cells to be successfully driven at sub-zero temperatures (for example: -30°C) or high temperatures (for example: 60°C).

The second aspect of the embodiment of the present invention discloses a device for determining the output power of a fuel cell, and the device for determining includes:

A determining module, configured to determine the working temperature that the electric stack of the fuel cell needs to reach, the operating temperature includes the water temperature at the inlet of the electric stack and the ambient temperature of the environmental box where the electric stack is located;

a maintenance module for maintaining said working temperature;

A screening module, configured to screen a target current loading rate that matches the operating temperature from a set of predetermined current loading rates;

a loading module, configured to load the real-time current of the fuel cell based on the target current loading rate;

An acquisition module, configured to acquire a real-time voltage corresponding to the real-time current;

A judging module, configured to judge whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference;

The determining module is further configured to determine the stable output power of the fuel cell when the judging module judges that the voltage difference is less than or equal to the preset voltage difference;

The judging module is also used to judge whether the stable output power is greater than or equal to the preset maximum output power of the fuel cell at the working temperature;

The determining module is further configured to determine that the stable output power is the maximum value of the fuel cell at the operating temperature when the judging module judges that the stable output power is greater than or equal to the preset maximum output power. Output Power;

An adjusting module is configured to adjust the working temperature, and trigger the maintaining module to perform the operation of maintaining the working temperature.

It can be seen that the second aspect of the present invention can improve the power distribution accuracy of the vehicle under different working conditions by determining the optimal power output capability corresponding to different temperatures in different temperature ranges, thereby improving the utilization rate of the fuel cell and improving the working efficiency of the vehicle. Efficiency; it can also improve the possibility and reliability of fuel cells to be successfully driven at sub-zero temperatures (for example: -30°C) or high temperatures (for example: 60°C).

The third aspect of the present invention discloses another device for determining the output power of a fuel cell, and the device for determining includes:

a memory storing executable program code;

a processor coupled to the memory;

The processor invokes the executable program code stored in the memory to execute the method for determining the output power of the fuel cell disclosed in the first aspect of the present invention.

The third aspect of the present invention discloses a computer storage medium, the computer storage medium stores computer instructions, and when the computer instructions are called, it is used to execute the method for determining the output power of the fuel cell disclosed in the first aspect of the present invention .

Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

In the embodiment of the present invention, a method and device for determining the output power of a fuel cell are disclosed. The method includes determining the operating temperature that the stack of the fuel cell needs to reach, and maintaining the operating temperature. The operating temperature includes the inlet of the stack. The temperature of the water and the ambient temperature of the environment box where the stack is located; select the target current loading rate that matches the working temperature from the set of predetermined current loading rates, and load the fuel cell based on the target current loading rate Real-time current, and obtain the real-time voltage corresponding to the real-time current; judge whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference, when it is judged that the voltage difference is less than or equal to the preset voltage difference, Determine the stable output power of the fuel cell, and determine whether the stable output power is greater than or equal to the preset maximum output power of the fuel cell at the operating temperature; when it is judged that the stable output power is greater than or equal to the preset maximum output power, determine that the stable output power is the fuel cell The maximum output power of the battery at the operating temperature; adjust the operating temperature and trigger the execution of the operation to maintain the operating temperature. It can be seen that the implementation of the embodiment of the present invention determines the optimal power output capability corresponding to different temperatures in different temperature ranges, thereby improving the power distribution accuracy of the vehicle under different working conditions, thereby improving the utilization rate of the fuel cell and improving the working efficiency of the vehicle ; It can also improve the possibility and reliability of the fuel cell to be successfully driven at sub-zero low temperature (for example: -30°C) or high temperature (for example: 60°C); it can also reduce the power of the stack when the fuel cell is requested to output high power at low temperature The phenomenon of icing may occur, which is beneficial to reduce the occurrence of fuel cell start-up failure, improve the service life of the fuel cell, and ensure the performance of the fuel cell.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is a schematic flowchart of a method for determining the output power of a fuel cell disclosed in an embodiment of the present invention;

Fig. 2 is a schematic flowchart of another method for determining the output power of a fuel cell disclosed in an embodiment of the present invention;

Fig. 3 is a schematic structural diagram of a device for determining the output power of a fuel cell disclosed in an embodiment of the present invention;

Fig. 4 is a schematic structural diagram of another device for determining the output power of a fuel cell disclosed in an embodiment of the present invention;

Fig. 5 is a schematic structural diagram of another device for determining the output power of a fuel cell disclosed in an embodiment of the present invention.

Detailed ways

In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The terms "first", "second" and the like in the description and claims of the present invention and the above drawings are used to distinguish different objects, rather than to describe a specific order. Furthermore, the terms "include" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, device, product or equipment comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or optionally further includes For other steps or units inherent in these processes, methods, products or devices.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present invention. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments.

The invention discloses a method and device for determining the output power of a fuel cell, which can improve the power distribution accuracy of a vehicle under different working conditions by determining the optimal power output capabilities corresponding to different temperatures in different temperature ranges, and further improve The utilization rate of the fuel cell and the improvement of the working efficiency of the vehicle can also improve the possibility and reliability of the successful driving of the fuel cell at sub-zero or high temperature; The stack may be icing, which is beneficial to reduce the occurrence of fuel cell start-up failure, improve the service life of the fuel cell, and ensure the performance of the fuel cell. Each will be described in detail below.

Embodiment one

Please refer to FIG. 1 . FIG. 1 is a schematic flowchart of a method for determining the output power of a fuel cell disclosed in an embodiment of the present invention. As shown in Figure 1, the method for determining the output power of the fuel cell may include the following operations:

101. Determine the working temperature that the fuel cell stack needs to reach, and maintain the working temperature. The working temperature includes the water temperature at the inlet of the stack and the ambient temperature of the environment box where the stack is located.

In the embodiment of the present invention, the fuel cell is provided with a temperature sensor, through which the temperature of the water at the inlet of the stack can be measured, wherein the water temperature is the temperature of the water at the inlet of the cooling liquid of the stack.

In the embodiment of the present invention, the fuel cell is installed in a box, the box is an environmental box, and the ambient temperature is the temperature inside the environmental box, wherein the ambient temperature is an adjustable temperature, and the temperature adjustment device corresponding to the environmental box The temperature inside the environmental chamber can be adjusted.

102. Select a target current loading rate that matches the working temperature from a set of predetermined current loading rates.

In the embodiment of the present invention, as an optional implementation manner, selecting a target current loading rate that matches the working temperature from a set of predetermined current loading rates may include:

determining the working temperature range corresponding to the working temperature from the set of predetermined temperature ranges;

The current loading rate matching the operating temperature range is selected from the predetermined current loading rate set as the target current loading rate matching the operating temperature.

In this optional implementation manner, the determined set of temperature intervals includes several temperature intervals, each temperature interval includes several temperature values, and the temperature values included in each temperature interval are different. Specifically, the set of temperature intervals includes a subzero low temperature interval, an above zero low temperature interval, and a normal temperature interval. Among them, the sub-zero low temperature temperature interval is the temperature interval with the above-mentioned ambient temperature of 0°C as the critical temperature point but including 0°C; °C) the temperature range of the second endpoint; the room temperature range only corresponds to one ambient temperature value, for example: 25°C. In the embodiment of the present invention, when the working temperature interval corresponding to the working temperature is the subzero low temperature temperature interval or the above zero low temperature temperature interval, the water temperature and the ambient temperature included in it have multiple temperature values, and the temperature values are the same, for example: water The temperature and ambient temperature are both -10°C, and the water temperature and ambient temperature are both 15°C. When the working temperature range corresponding to the working temperature is the normal temperature range, the ambient temperature included is only one temperature value, for example: 25°C, but the water temperature included has multiple temperature values, such as: 25°C, 30°C, etc. . Further, whether it is the water temperature or the ambient temperature, the value changes in an arithmetic progression.

In the embodiment of the present invention, the fuel cell has a corresponding rated current loading rate. Wherein, the rated current pulling current is the rate specified by the manufacturer of the fuel cell. The predetermined set of current loading rates includes several current loading rates, and each temperature range has a corresponding current loading rate. Specifically, the current loading rate corresponding to the sub-zero low temperature range is the first several times (for example: 0 times, etc.) the rated loading rate of the fuel cell, that is, when the operating temperature is in the sub-zero low temperature range, its target current loading rate is 0, that is, when the operating temperature of the fuel cell is in the subzero low temperature range, the fuel cell operates with a constant current, wherein the constant current is a predetermined current; the current load rate corresponding to the low temperature range above zero is the first Two several times (eg: 0.3 times) the rated loading rate of the fuel cell; the current loading rate corresponding to the normal temperature range is a third several times (eg: 1.0 times) the rated loading rate of the fuel cell. Wherein, the first several times is smaller than the second several times and is smaller than the third several times. Further, each temperature in each temperature range has a corresponding current loading rate. In this way, the determination accuracy of the maximum output power corresponding to each temperature can be improved by allocating the corresponding current loading rate for each temperature.

It can be seen that, in this optional embodiment, by first determining the temperature range corresponding to the temperature of the fuel cell, and determining the current load rate corresponding to the temperature range, the determination of the current load rate corresponding to the temperature of the fuel cell is realized, improving The determination accuracy of the current loading rate corresponding to the temperature is improved.

103. Load the real-time current of the fuel cell based on the target current loading rate, and acquire the real-time voltage corresponding to the real-time current.

In the embodiment of the present invention, the real-time current of the fuel cell is loaded based on the target current loading rate, specifically: the real-time current of the fuel cell is continuously loaded based on the target current loading rate. In this way, the uninterrupted and continuous pulling of current is not only beneficial to maintain the operating temperature of the fuel cell, but also facilitates the output power of the fuel cell to move in an increasing direction, thereby helping to determine the maximum output power at the operating temperature.

In the embodiment of the present invention, the real-time voltage corresponding to the real-time current is acquired, specifically: the real-time voltage corresponding to the real-time current is acquired according to the determined current-voltage characteristics.

104. Determine whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference. When it is judged that the voltage difference is less than or equal to the preset voltage difference, step 105 can be triggered to execute; when it is judged that the voltage When the difference is greater than the preset voltage difference, step 103 is continued to be triggered.

In the embodiment of the present invention, the preset voltage single low threshold is a predetermined voltage single low threshold, for example: 0.45V. Among them, the voltage single low threshold is the voltage single low threshold corresponding to the rapid drop in voltage of a certain slice in the stack due to the load, which drops to the point where the voltage cannot be further loaded to increase the power. Further, each temperature range has a corresponding voltage single low threshold. Further, the voltage single low thresholds corresponding to each temperature range are the same, for example: both are 0.45V, or the voltage single low thresholds corresponding to each temperature range are different, for example: the voltage single low thresholds corresponding to the sub-zero low temperature temperature range The threshold is 0.45V; the voltage single-low threshold corresponding to the low temperature range above zero is 0.47V; the voltage single-low threshold corresponding to the normal temperature temperature range is 0.50V. When the voltage single low threshold corresponding to each temperature range is the same, the preset voltage single low threshold should have sufficient voltage safety margin, and the voltage safety margin is greater than 0, for example: 0.02V.

In yet another optional embodiment, before performing step 104, the method for determining the output power of the fuel cell may further include the following operations:

Obtain the voltage single low threshold corresponding to the working temperature, determine the voltage single low threshold as the preset voltage single low threshold, and trigger execution of step 104 .

In the embodiment of the present invention, the identification information of each temperature and the voltage single low threshold of the temperature is preset. Then, the voltage single low threshold value corresponding to the working temperature is acquired, specifically, the target identification information of the working temperature is determined, and the voltage single low threshold value corresponding to the working temperature is determined according to the target identification information. In this way, the efficiency and accuracy of determining the voltage single low threshold corresponding to the temperature can be improved.

It can be seen that the embodiment of the present invention can improve the accuracy of obtaining the voltage single low threshold by obtaining the voltage single low threshold matching the corresponding temperature of the fuel cell, thereby further improving the accuracy of determining the maximum output power of the fuel cell.

In an optional embodiment, the method for determining the output power of the fuel cell may also include the following operations:

The voltage single low threshold is calibrated based on a predetermined calibration method to obtain a calibrated voltage single low threshold.

In this optional embodiment, as an optional implementation manner, determining the voltage single low threshold as the preset voltage single low threshold may include:

Determine the calibrated voltage single low threshold as the preset voltage single low threshold.

It can be seen that in this optional embodiment, by calibrating the single low voltage threshold, the accuracy of obtaining the single low voltage threshold can be improved, thereby further improving the accuracy of determining the maximum output power of the fuel cell.

105. Determine the stable output power of the fuel cell, and determine whether the stable output power is greater than or equal to the preset maximum output power of the fuel cell at the operating temperature; when it is judged that the stable output power is greater than or equal to the preset maximum output power, the execution step can be triggered 106: When it is determined that the stable output power is less than the preset maximum output power, end this process.

In the embodiment of the present invention, the stable output power of the fuel cell is determined, specifically: the stable output power corresponding to the real-time current can be obtained according to the determined current power characteristics, or the load resistance of the fuel cell under the real-time voltage can be obtained, and according to the load resistance The stable output power corresponding to the real-time current is obtained from the real-time current, or the stable output power corresponding to the real-time current is obtained according to the load resistance and real-time voltage, which is not limited in the embodiment of the present invention.

In the embodiment of the present invention, each operating temperature of the fuel cell has a corresponding preset maximum output power. Specifically, when the working temperature is a certain working temperature in the sub-zero low temperature range, the corresponding preset maximum output power is at a stable value, for example: the corresponding stack power under the stack current density of 250mA/cm ² (such as : 8.0KW), that is, when the sub-zero low-temperature start-up phase is not over, the stack power of the fuel cell is constant, and will not respond to other power requests of the vehicle at this time; At a certain working temperature, the corresponding preset maximum output power is a dynamic value, that is, the preset maximum output power corresponding to each working temperature in the low temperature range above zero is different, and the higher the temperature, the corresponding The preset maximum output power is higher. It should be noted that the preset maximum output powers corresponding to the low temperature range above zero, the low temperature range above zero, and the normal temperature temperature range increase sequentially.

106. Determine the stable output power as the maximum output power of the fuel cell at the working temperature.

In yet another optional embodiment, after it is determined in step 105 that the stable output power is greater than or equal to the preset maximum output power, and before step 106 is performed, the method for determining the output power of the fuel cell may further include the following operations:

Acquire the target duration of the fuel cell working at a stable output power, and judge whether the target duration reaches the first preset duration threshold corresponding to the operating temperature (for example: 5s, etc.);

When it is determined that the target duration reaches the first preset duration threshold, step 106 is triggered. It can be seen that in this optional embodiment, by first judging whether the duration of the output power of the fuel cell reaches the specified duration, if so, then performing the subsequent operation of determining that the output power is the maximum output power at the corresponding temperature, which can reduce the The output power of the fuel cell is maintained for a short period of time and the output power is determined as the maximum output power, which further improves the accuracy of determining the maximum output power of the fuel cell at the corresponding temperature, and further improves the output of the fuel cell and the power cell. Power distribution accuracy.

In yet another optional embodiment, the method for determining the output power of the fuel cell may also include the following operations:

When it is judged that the target duration does not reach the preset duration threshold, reduce the preset maximum output power to obtain the first preset maximum output power, and reduce the target current loading rate to obtain the first target current loading rate, and trigger Step 103 is executed, the target current loading rate is a first target current loading rate, wherein the first target current loading rate is equal to a first preset percentage (for example: 90%) of the target current loading rate.

Wherein, judging whether the stable output power is greater than or equal to the preset maximum output power corresponding to the working temperature is the first preset maximum output power, wherein the first preset maximum output power is equal to the second preset percentage (eg: 80%) preset maximum output power.

It can be seen that in this optional embodiment, when it is judged that the duration of the operating temperature of the fuel cell is short, keeping the operating temperature, reducing its corresponding preset maximum output power and its current load rate, and restarting Performing the subsequent load current operation can increase the possibility of obtaining the maximum output power at the corresponding temperature, and then complete the calibration of the maximum output capability at the temperature.

In yet another optional embodiment, after triggering the above-mentioned operation of determining the stable output power as the maximum output power of the fuel cell at the operating temperature, the method for determining the output power of the fuel cell may further include the following operations:

Monitor the target duration of the fuel cell working at a stable output power, and determine the target preset duration threshold corresponding to the target duration when the fuel cell is working at a lower than the stable output power Determine the target preset duration threshold as the fuel cell is working The calibrated working time for outputting stable output power at temperature.

In this optional embodiment, the target preset duration threshold includes any one of a first preset duration threshold, a second preset duration threshold, and a third preset duration threshold. Wherein, the first preset duration threshold is less than the second preset duration threshold, and the second preset duration threshold is smaller than the third preset duration threshold, for example: the first preset duration threshold, the second preset duration threshold The threshold and the third preset duration threshold are 5s, 10s and 20s in turn. Further, each working temperature has a corresponding first preset duration threshold, a second preset duration threshold and a third preset duration threshold, and the corresponding first preset duration threshold of each working temperature , the second preset duration threshold and the third preset duration threshold are all different.

In this optional embodiment, for example, the first preset duration threshold, the second preset duration threshold and the third preset duration threshold are 5s, 10s and 20s in turn, when the fuel cell is stably outputting at 30Kw The target duration of power work is 5s to 10s, but excluding 10s, the target duration of the fuel cell working with a stable output power of 30Kw is 5s; when the fuel cell works at a stable output power of 30Kw, the target duration is 10s to 20s , but not including 20s, the target duration of the fuel cell working with a stable output power of 30Kw is 10s; The target duration of power work is 20s.

It can be seen that, in this optional embodiment, by monitoring the duration of the fuel cell working at the corresponding operating temperature with stable output power, and determining the preset duration corresponding to the duration as the time for the fuel cell to work at the corresponding operating temperature at stable output power The calibration duration can improve the accuracy of the calibration duration of the fuel cell working at a stable output power at the corresponding working temperature, thereby improving the distribution accuracy of the output power of the vehicle under different working conditions, thereby improving the power performance of the vehicle.

107. Adjust the working temperature, and trigger the execution of the above-mentioned operation of maintaining the working temperature.

In the embodiment of the present invention, the working temperature can be changed according to the rule from low temperature to high temperature, for example, the water temperature corresponding to the working temperature of the fuel cell changes from -40°C to 60°C. This is conducive to improving the calibration efficiency of the maximum output power of the fuel cell at other temperatures, thereby improving the efficiency of obtaining all the maximum output power of the fuel cell at multiple temperature segments.

In yet another optional embodiment, the method for determining the output power of the fuel cell may also include the following steps:

Counting the maximum output power corresponding to each working temperature range, and associating each working temperature range with the maximum output power corresponding to the working temperature range, obtaining associated information, and storing all associated information.

It can be seen that in this optional embodiment, by associating each temperature range with the maximum output power of the temperature range and storing the associated information, the corresponding maximum output power can be quickly located through the temperature, thereby further improving the fuel cell and power output. The accuracy of the power distribution of the battery.

In yet another optional embodiment, the method for determining the output power of the fuel cell may also include the following operations:

When it is judged that the stable output power is less than the preset maximum output power, reduce the preset maximum output power to obtain the second preset maximum output power, and reduce the target current loading rate to obtain the second target current loading rate, and trigger execution Step 103, the target current loading rate is the second target current loading rate;

Wherein, judging whether the stable output power is greater than or equal to the preset maximum output power corresponding to the working temperature is the second preset maximum output power.

In this optional embodiment, when it is judged that the stable output power is less than the preset maximum output power, that is, when the fuel cell output power is greater than the preset maximum output power, the real-time voltage of the fuel cell is less than or equal to the preset voltage single bottom Threshold situation,

In this optional embodiment, please refer to the above-mentioned detailed descriptions for the first preset maximum output power and the first target current loading rate for the relevant description of the second preset maximum output power and the second target current loading rate. , which will not be repeated here. Wherein, the second preset maximum output power may be equal to or not equal to the first preset maximum output power.

It can be seen that in this optional embodiment, by judging that when the output power of the fuel cell is greater than or equal to the preset maximum output power at the working temperature, when the real-time voltage of the fuel cell is lower than the preset voltage single low threshold value, the working temperature is maintained In this case, reducing its corresponding preset maximum output power and its current loading rate, and re-executing the subsequent operation of loading current can improve the possibility of obtaining the maximum output power at the corresponding temperature, and then complete the operation at this temperature. Calibration of maximum output capability.

In yet another optional embodiment, the method for determining the output power of the fuel cell may also include the following operations:

Based on each operating temperature of the fuel cell, the stable output power corresponding to the operating temperature, and the calibrated working time corresponding to the stable output power, a MAP diagram of the fuel cell is made.

It can be seen that this optional embodiment can intuitively and clearly know the power output of the fuel cell by formulating the MAP diagram of the maximum output power of the fuel cell at each operating temperature and the corresponding operating duration, which further facilitates The MAP map distributes the power of the vehicle, thereby improving the accuracy of power distribution of the vehicle.

It can be seen that implementing the method for determining the output power of the fuel cell described in Figure 1 can improve the accuracy of the power distribution of the vehicle under different working conditions by determining the optimal power output capabilities corresponding to different temperatures in different temperature ranges, thereby improving the fuel efficiency. The utilization rate of the battery and the improvement of the working efficiency of the vehicle; it can also improve the possibility and reliability of the fuel cell to be successfully driven at subzero low temperature (for example: -30°C) or high temperature (for example: 60°C), and can also reduce the When the fuel cell is requested to output high power, the stack may freeze, which is beneficial to reduce the occurrence of fuel cell start-up failure, improve the service life of the fuel cell, and ensure the performance of the fuel cell.

Embodiment two

Please refer to FIG. 2 . FIG. 2 is a schematic flowchart of another method for determining the output power of a fuel cell disclosed in an embodiment of the present invention. As shown in Figure 2, the method for determining the output power of the fuel cell may include the following operations:

201. Determine the working temperature that the fuel cell stack needs to reach, and maintain the working temperature, the working temperature includes the water temperature at the inlet of the stack and the ambient temperature of the environment box where the stack is located.

202. Select a target current loading rate that matches the working temperature from a predetermined set of current loading rates.

203. Determine whether the working temperature is a certain working temperature in the preset temperature range; when it is determined that the working temperature is not a certain working temperature, trigger step 205; when it is determined that the working temperature is a certain working temperature, trigger step 204.

In the embodiment of the present invention, the preset temperature range is the above-mentioned sub-zero low temperature range. This target launcher pre-made program.

In this embodiment of the present invention, it should be noted that step 203 and step 202 may also occur simultaneously.

204 . Obtain a target starting program corresponding to the preset temperature range, start the fuel cell based on the target starting program, and trigger step 205 .

It can be seen that in the embodiment of the present invention, when pulling the current of the fuel cell, it is first judged whether the operating temperature of the fuel cell is a certain operating temperature in a specific temperature range, and if so, the fuel cell is started based on the start-up procedure, and the real-time The current can improve the possibility of successful start-up of the fuel cell and the accuracy of loading, thereby further improving the accuracy of obtaining the power output capability of the fuel cell, and further improving the accuracy of power distribution of the vehicle.

205. Load the real-time current of the fuel cell based on the target current loading rate, and acquire the real-time voltage corresponding to the real-time current.

206. Determine whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference. When it is judged that the voltage difference is less than or equal to the preset voltage difference, step 207 can be triggered; when it is judged that the voltage When the difference is greater than the preset voltage difference, step 206 is continued to be triggered.

207. Determine the stable output power of the fuel cell, and determine whether the stable output power is greater than or equal to the preset maximum output power of the fuel cell at the operating temperature; when it is judged that the stable output power is greater than or equal to the preset maximum output power, the execution step can be triggered 208: When it is determined that the stable output power is less than the preset maximum output power, end this process.

208. Determine the stable output power as the maximum output power of the fuel cell at the working temperature.

209. Adjust the working temperature, and trigger the execution of the above-mentioned operation of maintaining the working temperature.

In the embodiment of the present invention, please refer to the detailed description of step 101-step 107 in the first embodiment for the related description of step 201, step 202, and step 205-step 209, which will not be repeated in the embodiment of the present invention.

It can be seen that implementing the method for determining the output power of the fuel cell described in Figure 2 can improve the accuracy of the power distribution of the vehicle under different working conditions by determining the optimal power output capabilities corresponding to different temperatures in different temperature ranges, thereby improving the fuel efficiency. The utilization rate of the battery and the improvement of the working efficiency of the vehicle can also reduce the possible freezing of the stack when the fuel cell is requested to output high power at low temperature, thereby helping to reduce the occurrence of fuel cell start-up failures and improve fuel efficiency. The service life of the battery and the performance of the fuel cell can be guaranteed; it can also improve the possibility of successful startup of the fuel cell and the accuracy of loading, thereby further improving the accuracy of the power output capability of the fuel cell, and further improving the power of the vehicle Allocation accuracy.

Embodiment Three

Please refer to FIG. 3 . FIG. 3 is a schematic structural diagram of a device for determining output power of a fuel cell disclosed in an embodiment of the present invention. As shown in FIG. 3, the device for determining the output power of the fuel cell may include a determination module 301, a maintenance module 302, a screening module 303, a loading module 304, an acquisition module 305, a judgment module 306, and an adjustment module 307, wherein:

The determination module 301 is used to determine the working temperature that the electric stack of the fuel cell needs to reach, and the operating temperature includes the water temperature at the inlet of the electric stack and the ambient temperature of the environment box where the electric stack is located.

The maintaining module 302 is used for maintaining the working temperature.

The screening module 303 is configured to screen a target current loading rate that matches the working temperature from a set of predetermined current loading rates.

The loading module 304 is configured to load the real-time current of the fuel cell based on the target current loading rate.

The acquisition module 305 is configured to acquire the real-time voltage corresponding to the real-time current.

The judging module 306 is configured to judge whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference.

The determining module 301 is further configured to determine the stable output power of the fuel cell when the judging module 306 judges that the voltage difference is less than or equal to the preset voltage difference.

The judging module 306 is also used to judge whether the stable output power is greater than or equal to the preset maximum output power of the fuel cell at the working temperature.

The determining module 301 is further configured to determine that the stable output power is the maximum output power of the fuel cell at the working temperature when the judging module 301 judges that the stable output power is greater than or equal to the preset maximum output power.

The adjusting module 307 is configured to adjust the working temperature, and trigger the maintaining module 302 to perform the above operation of maintaining the working temperature.

In the embodiment of the present invention, after the determination module 301 completes the above-mentioned operation of determining the stable output power as the maximum output power of the fuel cell at the working temperature, the adjustment module 307 may be triggered to perform the above-mentioned operation of adjusting the working temperature.

It can be seen that the implementation of the device for determining the output power of the fuel cell described in Figure 3 can improve the accuracy of power distribution of the vehicle under different working conditions by determining the optimal power output capability corresponding to different temperatures in different temperature ranges, thereby improving the fuel efficiency. The utilization rate of the battery and the improvement of the working efficiency of the vehicle; it can also improve the possibility and reliability of the fuel cell to be successfully driven at sub-zero or high temperature, and can also reduce the possibility of causing the stack to be damaged when the fuel cell is requested to output high power at low temperature. The phenomenon of icing may occur, which is beneficial to reduce the occurrence of fuel cell start-up failure, improve the service life of the fuel cell, and ensure the performance of the fuel cell.

In an optional embodiment, as shown in FIG. 3 , the acquiring module 305 is further configured to determine that the stable output power is greater than or equal to the preset maximum output power after the judging module 306 determines that the stable output power is Before the maximum output power of the fuel cell at the operating temperature, obtain the target duration for the fuel cell to work at a stable output power.

The judging module 306 is also used to judge whether the target duration reaches the first preset duration threshold corresponding to the working temperature. When it is judged that the target duration reaches the first preset duration threshold, the trigger determination module 301 executes the above-mentioned determination and stabilization The output power is operated as the maximum output power of the fuel cell at the operating temperature.

It can be seen that the implementation of the device for determining the output power of the fuel cell described in FIG. 3 can also be performed by first judging whether the duration of the output power of the fuel cell reaches the specified duration. The operation of the output power can reduce the situation that the output power of the fuel cell is determined as the maximum output power due to the short duration of the output power of the fuel cell, and further improves the accuracy of determining the maximum output power of the fuel cell at the corresponding temperature. Furthermore, the distribution accuracy of the output power of the fuel cell and the power battery is further improved.

In an optional embodiment, on the basis of the device for determining the output power of the fuel cell described in FIG. 3 , the device for determining the output power of the fuel cell may also include a first control module 308. The device for determining the output power of the battery can be shown in Figure 4, which is a schematic structural diagram of another device for determining the output power of the fuel cell, wherein:

The first control module 308 is configured to reduce the preset maximum output power to obtain a first preset maximum output power when the judging module 306 judges that the target duration does not reach the preset duration threshold.

The first control module 308 is also used to reduce the target current loading rate to obtain the first target current loading rate, and trigger the loading module 304 to perform the above-mentioned current operation of loading the fuel cell based on the target current loading rate. The target current loading rate is the first target current loading rate.

Wherein, it is judged whether the stable output power is greater than or equal to the preset maximum output power corresponding to the working temperature, and the preset maximum output power is the first preset maximum output power.

It can be seen that implementing the device for determining the output power of the fuel cell described in FIG. 4 can reduce the corresponding preset maximum output power by keeping the operating temperature at the fuel cell when it is judged that the duration of the operating temperature is short. And its current loading rate, and re-executing the subsequent loading current operation can improve the possibility of obtaining the maximum output power at the corresponding temperature, and then complete the calibration of the maximum output capacity at the temperature.

In yet another optional embodiment, as shown in FIG. 4, the device for determining the output power of the fuel cell may further include a monitoring module 309, wherein:

The monitoring module 309 is configured to monitor the target duration of the fuel cell working at the stable output power after the trigger determining module 301 performs the above operation of determining the stable output power as the maximum output power of the fuel cell at the working temperature.

The determining module 301 is also used to determine a target preset duration threshold corresponding to the target duration when the fuel cell operates at a lower than stable output power, and the target preset duration threshold includes a first preset duration threshold, a second preset duration threshold Any one of the preset duration threshold and the third preset duration threshold.

The determination module 301 is further configured to determine the target preset duration threshold as the calibrated working duration for the fuel cell to output stable output power at the working temperature.

Wherein, the first preset duration threshold is smaller than the second preset duration threshold, and the second preset duration threshold is smaller than the third preset duration threshold.

It can be seen that the implementation of the device for determining the output power of the fuel cell described in FIG. 4 can also monitor the duration of the fuel cell working at the corresponding operating temperature with stable output power, and determine the preset duration corresponding to the duration as the fuel cell The calibration duration of working with stable output power at the corresponding working temperature can improve the accuracy of obtaining the calibration duration of the fuel cell working with stable output power at the corresponding working temperature, thereby improving the distribution accuracy of the output power of the vehicle under different working conditions , thereby improving the dynamic performance of the vehicle.

In yet another optional embodiment, as shown in FIG. 4, the device for determining the output power of the fuel cell may further include a production module 310, wherein:

The making module 310 is used to make a MAP map of the fuel cell based on each working temperature of the fuel cell, the stable output power corresponding to the working temperature, and the calibrated working time corresponding to the stable output power.

It can be seen that implementing the device for determining the output power of the fuel cell described in Figure 4 can also intuitively and clearly know the fuel cell by formulating the MAP diagram of the maximum output power of the fuel cell at each operating temperature and the corresponding operating duration. The power output situation of the vehicle is further conducive to the distribution of the power of the vehicle according to the MAP map, thereby improving the accuracy of power distribution of the vehicle.

In yet another optional embodiment, as shown in FIG. 4, the device for determining the output power of the fuel cell may further include a second control module 311, wherein:

The second control module 311 is configured to reduce the preset maximum output power to obtain a second preset maximum output power when the judging module judges that the stable output power is less than the preset maximum output power.

The second control module 311 is also used to reduce the target current loading rate to obtain the second target current loading rate, and trigger the determination module 301 to perform the above-mentioned current current operation of loading the fuel cell based on the target current loading rate. The current loading rate is the second target current loading rate.

Wherein, judging whether the stable output power is greater than or equal to the preset maximum output power corresponding to the working temperature is the second preset maximum output power.

It can be seen that the device for determining the output power of the fuel cell described in FIG. 4 can also be determined by judging that when the output power of the fuel cell is greater than or equal to the preset maximum output power at the operating temperature, the real-time voltage of the fuel cell is lower than the preset voltage. When the single low threshold is maintained at the operating temperature, reduce its corresponding preset maximum output power and its current load rate, and re-execute the subsequent load current operation, which can increase the maximum output power obtained at the corresponding temperature Possibility, and then complete the calibration of the maximum output capacity at this temperature.

In yet another optional embodiment, as shown in FIG. 4 , the device for determining the output power of the fuel cell may further include a starting module 312, wherein:

The judging module 306 is also used to judge whether the operating temperature is a certain operating temperature in the preset temperature range before the loading module 304 loads the real-time current of the fuel cell based on the target current loading rate. When a working temperature is reached, the loading module 304 is triggered to perform the above-mentioned operation of loading the real-time current of the fuel cell based on the target current loading rate.

The acquiring module 305 is further configured to acquire the target startup program corresponding to the preset temperature range when the judging module 306 judges that the working temperature is a certain working temperature.

The starting module 312 is configured to start the fuel cell based on the target starting procedure, and trigger the loading module 304 to perform the above-mentioned operation of loading the real-time current of the fuel cell based on the target current loading rate.

It can be seen that the implementation of the device for determining the output power of the fuel cell described in FIG. 4 can also first determine whether the operating temperature of the fuel cell is a certain operating temperature in a specific temperature range when pulling the current of the fuel cell, and if so, based on The starting program starts the fuel cell and loads the real-time current of the fuel cell, which can improve the possibility of successful starting of the fuel cell and the accuracy of loading.

In yet another optional embodiment, as shown in FIG. 4 , the screening module 303 selects the target current loading rate matching the working temperature from the predetermined set of current loading rates in the following manner:

determining the working temperature range corresponding to the working temperature from the set of predetermined temperature ranges;

The current loading rate matching the operating temperature range is selected from the predetermined current loading rate set as the target current loading rate matching the operating temperature.

In this optional embodiment, the determined set of temperature intervals includes several temperature intervals, each temperature interval includes several temperature values, and the temperature values included in each temperature interval are different.

It can be seen that implementing the device for determining the output power of the fuel cell described in FIG. 4 can also first determine the temperature range corresponding to the temperature of the fuel cell, and then determine the current load rate corresponding to the temperature range, thereby realizing the output power corresponding to the fuel cell. The determination of the current loading rate of the temperature improves the accuracy of determining the current loading rate corresponding to the temperature.

In yet another optional embodiment, as shown in FIG. 4 , the acquiring module 305 is also used to determine whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference before the judging module 306 , to obtain the voltage single low threshold corresponding to the operating temperature.

The determination module 301 is also used to determine that the voltage single low threshold is the preset voltage single low threshold, and the trigger judgment module 306 performs the above-mentioned judgment whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference operation.

It can be seen that implementing the device for determining the output power of the fuel cell described in FIG. 4 can also improve the accuracy of obtaining the single low voltage threshold by obtaining a voltage single low threshold that matches the corresponding temperature of the fuel cell, thereby further increasing the maximum capacity of the fuel cell. The determination accuracy of the output power.

Embodiment four

Please refer to FIG. 5 . FIG. 5 is another device for determining the output power of a fuel cell disclosed in an embodiment of the present invention. As shown in Figure 5, the device for determining the output power of the fuel cell may include:

A memory 501 storing executable program codes;

a processor 502 coupled to the memory 501;

The processor 502 invokes the executable program code stored in the memory 501 to execute the steps in the method for determining the output power of the fuel cell described in the first or second embodiment.

Embodiment five

The embodiment of the present invention discloses a computer-readable storage medium, which stores a computer program for electronic data exchange, wherein the computer program enables the computer to perform the determination of the output power of the fuel cell described in Embodiment 1 or Embodiment 2 steps in the method.

Embodiment six

The embodiment of the present invention discloses a computer program product, the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable the computer to execute the description described in Embodiment 1 or Embodiment 2 The steps in the method of determining the output power of the fuel cell.

The device embodiments described above are only illustrative, and the modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in One place, or it can be distributed to multiple network modules. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without any creative effort.

Through the specific description of the above embodiments, those skilled in the art can clearly understand that each implementation manner can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware. Based on this understanding, the above-mentioned technical solution 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, and the storage medium includes a read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), programmable read-only memory (Programmable Read-only Memory, PROM), erasable programmable read-only memory (Erasable Programmable Read Only Memory, EPROM) , One-time Programmable Read-Only Memory (OTPROM), Electronically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory , CD-ROM) or other optical disk storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

Finally, it should be noted that: the method and device for determining the output power of a fuel cell disclosed in the embodiments of the present invention are only the preferred embodiments of the present invention, and are only used to illustrate the technical solutions of the present invention, not to Its limitations; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that it can still modify the technical solutions described in the aforementioned embodiments, or perform equivalents to some of the technical features Replacement; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (39)

1. A method for determining the output power of a fuel cell, characterized in that the method comprises: Determine the working temperature that the electric stack of the fuel cell needs to reach, and maintain the working temperature, the working temperature includes the water temperature at the inlet of the electric stack and the ambient temperature of the environmental box where the electric stack is located; Select a target current loading rate that matches the operating temperature from a set of predetermined current loading rates, and load the real-time current of the fuel cell based on the target current loading rate, and obtain the real-time The real-time voltage corresponding to the current; judging whether the voltage difference between the real-time voltage and the preset voltage single-low threshold is less than or equal to the preset voltage difference, and determining whether the voltage difference of the fuel cell is less than or equal to the preset voltage difference Stabilizing the output power, and judging whether the stable output power is greater than or equal to the preset maximum output power of the fuel cell at the operating temperature; When it is determined that the stable output power is greater than or equal to the preset maximum output power, determine that the stable output power is the maximum output power of the fuel cell at the operating temperature; Adjusting the working temperature, and triggering the execution of the operation of maintaining the working temperature. 2. The method for determining the output power of the fuel cell according to claim 1, characterized in that after determining that the stable output power is greater than or equal to the preset maximum output power, and determining the stable output power Before the maximum output power of the fuel cell at the operating temperature, the method further includes: Obtaining a target duration for the fuel cell to work at the stable output power, and judging whether the target duration reaches a first preset duration threshold corresponding to the operating temperature; When it is determined that the target duration reaches the first preset duration threshold, the operation of determining the stable output power as the maximum output power of the fuel cell at the operating temperature is triggered. 3. The method for determining the output power of the fuel cell according to claim 2, wherein the method further comprises: When it is determined that the target duration does not reach the preset duration threshold, reduce the preset maximum output power to obtain a first preset maximum output power, and reduce the target current loading rate to obtain a first a target current loading rate, and triggering the execution of the current current operation of loading the fuel cell based on the target current loading rate, where the target current loading rate is the first target current loading rate; Wherein, the judging whether the stable output power is greater than or equal to the preset maximum output power corresponding to the working temperature is the first preset maximum output power. 4. The method for determining the output power of the fuel cell according to claim 2 or 3, wherein the triggering is performed to determine the stable output power as the maximum output power of the fuel cell at the operating temperature. After the operation of the output power, the method also includes: monitoring the target duration during which the fuel cell operates at the stable output power, and determining a target preset duration threshold corresponding to the target duration when the fuel cell operates at a lower than the stable output power , the target preset duration threshold includes any one of the first preset duration threshold, the second preset duration threshold, and the third preset duration threshold; determining the target preset duration threshold as a calibrated working time for the fuel cell to output the stable output power at the working temperature; Wherein, the first preset duration threshold is smaller than the second preset duration threshold, and the second preset duration threshold is smaller than the third preset duration threshold. 5. The method for determining the output power of the fuel cell according to claim 4, wherein the method further comprises: Based on each of the operating temperatures of the fuel cell, the stable output power corresponding to the operating temperature, and the calibrated operating time corresponding to the stable output power, a MAP diagram of the fuel cell is prepared. 6. The method for determining the output power of the fuel cell according to claim 1, 2, 3 or 5, wherein the method further comprises: When it is determined that the stable output power is less than the preset maximum output power, reduce the preset maximum output power to obtain a second preset maximum output power, and reduce the target current loading rate to obtain a second target a current loading rate, and triggering the execution of the current current operation of loading the fuel cell based on the target current loading rate, where the target current loading rate is the second target current loading rate; Wherein, the judging whether the stable output power is greater than or equal to the preset maximum output power corresponding to the working temperature is the second preset maximum output power. 7. The method for determining the output power of the fuel cell according to claim 4, wherein the method further comprises: When it is determined that the stable output power is less than the preset maximum output power, reduce the preset maximum output power to obtain a second preset maximum output power, and reduce the target current loading rate to obtain a second target a current loading rate, and triggering the execution of the current current operation of loading the fuel cell based on the target current loading rate, where the target current loading rate is the second target current loading rate; Wherein, the judging whether the stable output power is greater than or equal to the preset maximum output power corresponding to the working temperature is the second preset maximum output power. 8. The method for determining the output power of the fuel cell according to claim 1, 2, 3, 5 or 7, wherein before the real-time current of the fuel cell is loaded based on the target current loading rate, , the method also includes: judging whether the working temperature is a certain working temperature in a preset temperature range; When it is judged that the operating temperature is not the certain operating temperature, triggering the execution of the operation of loading the real-time current of the fuel cell based on the target current loading rate; When it is determined that the operating temperature is the certain operating temperature, obtain a target start-up program corresponding to the preset temperature range, start the fuel cell based on the target start-up program, and trigger the execution of the The target current loading rate is used to load the real-time current of the fuel cell. 9. The method for determining the output power of the fuel cell according to claim 4, wherein before the real-time current of the fuel cell is loaded based on the target current loading rate, the method further comprises: judging whether the working temperature is a certain working temperature in a preset temperature range; When it is judged that the operating temperature is not the certain operating temperature, triggering the execution of the operation of loading the real-time current of the fuel cell based on the target current loading rate; When it is determined that the operating temperature is the certain operating temperature, obtain a target start-up program corresponding to the preset temperature range, start the fuel cell based on the target start-up program, and trigger the execution of the The target current loading rate is used to load the real-time current of the fuel cell. 10. The method for determining the output power of the fuel cell according to claim 6, wherein before the real-time current of the fuel cell is loaded based on the target current loading rate, the method further comprises: judging whether the working temperature is a certain working temperature in a preset temperature range; When it is judged that the operating temperature is not the certain operating temperature, triggering the execution of the operation of loading the real-time current of the fuel cell based on the target current loading rate; When it is determined that the operating temperature is the certain operating temperature, obtain a target start-up program corresponding to the preset temperature range, start the fuel cell based on the target start-up program, and trigger the execution of the The target current loading rate is used to load the real-time current of the fuel cell. 11. The method for determining the output power of the fuel cell according to claim 1, 2, 3, 5, 7, 9 or 10, characterized in that the selection of the selected current load rate set from the predetermined set Target current draw rates to match the operating temperature described above, including: determining the working temperature range corresponding to the working temperature from a set of predetermined temperature ranges; A current loading rate matching the operating temperature range is selected from a predetermined set of current loading rates as a target current loading rate matching the operating temperature. 12. The method for determining the output power of the fuel cell according to claim 6, characterized in that, selecting a target current loading rate that matches the operating temperature from a set of predetermined current loading rates, include: determining the working temperature range corresponding to the working temperature from a set of predetermined temperature ranges; A current loading rate matching the operating temperature range is selected from a predetermined set of current loading rates as a target current loading rate matching the operating temperature. 13. The method for determining the output power of the fuel cell according to claim 8, characterized in that, selecting a target current loading rate that matches the operating temperature from a set of predetermined current loading rates, include: determining the working temperature range corresponding to the working temperature from a set of predetermined temperature ranges; A current loading rate matching the operating temperature range is selected from a predetermined set of current loading rates as a target current loading rate matching the operating temperature. 14. The method for determining the output power of a fuel cell according to claim 8, wherein the set of determined temperature intervals includes several temperature intervals, and each of the temperature intervals includes several temperature values, and The temperature values contained in each of the temperature intervals are different. 15. The method for determining the output power of a fuel cell according to claim 1, 2, 3, 5, 7, 9, 10, 12, 13 or 14, wherein said judging said real-time voltage and preset Whether the voltage difference of the voltage single low threshold is less than or equal to the preset voltage difference, the method also includes: Obtaining the voltage single-low threshold corresponding to the working temperature, and determining that the voltage single-low threshold is a preset voltage single-low threshold, and triggering the execution of the judgment of the voltage difference between the real-time voltage and the preset voltage single-low threshold Whether the value is less than or equal to the operation of the preset voltage difference. 16. The method for determining the output power of the fuel cell according to claim 4, characterized in that, before the judging whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference, The method also includes: Obtaining the voltage single-low threshold corresponding to the working temperature, and determining that the voltage single-low threshold is a preset voltage single-low threshold, and triggering the execution of the judgment of the voltage difference between the real-time voltage and the preset voltage single-low threshold Whether the value is less than or equal to the operation of the preset voltage difference. 17. The method for determining the output power of the fuel cell according to claim 6, characterized in that, before the judging whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference, The method also includes: Obtaining the voltage single-low threshold corresponding to the working temperature, and determining that the voltage single-low threshold is a preset voltage single-low threshold, and triggering the execution of the judgment of the voltage difference between the real-time voltage and the preset voltage single-low threshold Whether the value is less than or equal to the operation of the preset voltage difference. 18. The method for determining the output power of a fuel cell according to claim 8, characterized in that, before determining whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference, The method also includes: Obtaining the voltage single-low threshold corresponding to the working temperature, and determining that the voltage single-low threshold is a preset voltage single-low threshold, and triggering the execution of the judgment of the voltage difference between the real-time voltage and the preset voltage single-low threshold Whether the value is less than or equal to the operation of the preset voltage difference. 19. The method for determining the output power of the fuel cell according to claim 11, characterized in that, before determining whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference, The method also includes: Obtaining the voltage single-low threshold corresponding to the working temperature, and determining that the voltage single-low threshold is a preset voltage single-low threshold, and triggering the execution of the judgment of the voltage difference between the real-time voltage and the preset voltage single-low threshold Whether the value is less than or equal to the operation of the preset voltage difference. 20. A device for determining the output power of a fuel cell, characterized in that the device for determining comprises: A determining module, configured to determine the working temperature that the electric stack of the fuel cell needs to reach, the operating temperature includes the water temperature at the inlet of the electric stack and the ambient temperature of the environmental box where the electric stack is located; a maintenance module for maintaining said working temperature; A screening module, configured to screen a target current loading rate that matches the operating temperature from a set of predetermined current loading rates; a loading module, configured to load the real-time current of the fuel cell based on the target current loading rate; An acquisition module, configured to acquire a real-time voltage corresponding to the real-time current; A judging module, configured to judge whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference; The determining module is further configured to determine the stable output power of the fuel cell when the judging module judges that the voltage difference is less than or equal to the preset voltage difference; The judging module is also used to judge whether the stable output power is greater than or equal to the preset maximum output power of the fuel cell at the working temperature; The determining module is further configured to determine that the stable output power is the maximum value of the fuel cell at the operating temperature when the judging module judges that the stable output power is greater than or equal to the preset maximum output power. Output Power; An adjusting module is configured to adjust the working temperature, and trigger the maintaining module to perform the operation of maintaining the working temperature. 21. The device for determining the output power of the fuel cell according to claim 20, wherein the acquisition module is also used to determine, in the judgment module, that the stable output power is greater than or equal to the preset maximum output After the power, and before the determination module determines that the stable output power is the maximum output power of the fuel cell at the operating temperature, acquiring a target duration for the fuel cell to work at the stable output power; The judging module is also used to judge whether the target duration reaches the first preset duration threshold corresponding to the working temperature, and when it is judged that the target duration reaches the first preset duration threshold, The determining module is triggered to perform the operation of determining the stable output power as the maximum output power of the fuel cell at the operating temperature. 22. The device for determining the output power of the fuel cell according to claim 21, wherein the device for determining further comprises: A first control module, configured to reduce the preset maximum output power to obtain a first preset maximum output power when the judging module judges that the target duration does not reach the preset duration threshold; The first control module is further configured to reduce the target current loading rate to obtain a first target current loading rate, and trigger the loading module to perform the loading based on the target current loading rate. The current current operation of the fuel cell, the target current loading rate is the first target current loading rate; Wherein, the judging whether the stable output power is greater than or equal to the preset maximum output power corresponding to the working temperature is the first preset maximum output power. 23. The device for determining the output power of the fuel cell according to claim 21 or 22, wherein the determining device further comprises: a monitoring module configured to monitor the fuel cell to output at the stable output power after triggering the determining module to perform the operation of determining the stable output power as the maximum output power of the fuel cell at the operating temperature said target duration of power work; The determination module is further used to determine a target preset duration threshold corresponding to the target duration when the fuel cell operates at a rate lower than the stable output power, and the target preset duration threshold includes the Any one of the first preset duration threshold, the second preset duration threshold, and the third preset duration threshold; The determination module is also used to determine the target preset duration threshold as the calibrated working time for the fuel cell to output the stable output power at the working temperature; Wherein, the first preset duration threshold is smaller than the second preset duration threshold, and the second preset duration threshold is smaller than the third preset duration threshold. 24. The device for determining the output power of the fuel cell according to claim 23, wherein the determining device further comprises: The production module is used to produce the MAP map of the fuel cell based on each of the operating temperatures of the fuel cell, the stable output power corresponding to the operating temperature, and the calibrated working time corresponding to the stable output power. 25. The device for determining the output power of the fuel cell according to claim 20, 21, 22 or 24, wherein the determining device further comprises: A second control module, configured to reduce the preset maximum output power to obtain a second preset maximum output power when the judging module judges that the stable output power is less than the preset maximum output power; The second control module is further configured to reduce the target current loading rate to obtain a second target current loading rate, and trigger the determination module to perform the loading of the target current loading rate based on the target current loading rate. The current current operation of the fuel cell, the target current loading rate is the second target current loading rate; Wherein, the judging whether the stable output power is greater than or equal to the preset maximum output power corresponding to the working temperature is the second preset maximum output power. 26. The device for determining the output power of the fuel cell according to claim 23, wherein the determining device further comprises: A second control module, configured to reduce the preset maximum output power to obtain a second preset maximum output power when the judging module judges that the stable output power is less than the preset maximum output power; The second control module is further configured to reduce the target current loading rate to obtain a second target current loading rate, and trigger the determination module to perform the loading of the target current loading rate based on the target current loading rate. The current current operation of the fuel cell, the target current loading rate is the second target current loading rate; Wherein, the judging whether the stable output power is greater than or equal to the preset maximum output power corresponding to the working temperature is the second preset maximum output power. 27. The device for determining the output power of the fuel cell according to claim 20, 21, 22 or 24, wherein the determining device further comprises: The judging module is further configured to judge whether the operating temperature is a certain operating temperature in a preset temperature range before the loading module loads the real-time current of the fuel cell based on the target current loading rate, When it is judged that the operating temperature is not the certain operating temperature, triggering the loading module to perform the operation of loading the real-time current of the fuel cell based on the target current loading rate; The acquiring module is further configured to acquire a target startup program corresponding to the preset temperature interval when the judging module judges that the working temperature is the certain working temperature; The starting module is configured to start the fuel cell based on the target starting program, and trigger the loading module to perform the operation of loading the real-time current of the fuel cell based on the target current loading rate. 28. The device for determining the output power of the fuel cell according to claim 23, characterized in that the determining device further comprises: The judging module is further configured to judge whether the operating temperature is a certain operating temperature in a preset temperature range before the loading module loads the real-time current of the fuel cell based on the target current loading rate, When it is judged that the operating temperature is not the certain operating temperature, triggering the loading module to perform the operation of loading the real-time current of the fuel cell based on the target current loading rate; The acquiring module is further configured to acquire a target startup program corresponding to the preset temperature interval when the judging module judges that the working temperature is the certain working temperature; The starting module is configured to start the fuel cell based on the target starting program, and trigger the loading module to perform the operation of loading the real-time current of the fuel cell based on the target current loading rate. 29. The device for determining the output power of the fuel cell according to claim 25, wherein the determining device further comprises: The judging module is further configured to judge whether the operating temperature is a certain operating temperature in a preset temperature range before the loading module loads the real-time current of the fuel cell based on the target current loading rate, When it is judged that the operating temperature is not the certain operating temperature, triggering the loading module to perform the operation of loading the real-time current of the fuel cell based on the target current loading rate; The acquiring module is further configured to acquire a target startup program corresponding to the preset temperature interval when the judging module judges that the working temperature is the certain working temperature; The starting module is configured to start the fuel cell based on the target starting program, and trigger the loading module to perform the operation of loading the real-time current of the fuel cell based on the target current loading rate. 30. The device for determining the output power of a fuel cell according to claim 20, 21, 22, 24, 26, 28 or 29, wherein the screening module selects The way to match the target current loading rate with the operating temperature is as follows: determining the working temperature range corresponding to the working temperature from a set of predetermined temperature ranges; A current loading rate matching the operating temperature range is selected from a predetermined set of current loading rates as a target current loading rate matching the operating temperature. 31. The device for determining the output power of a fuel cell according to claim 23, wherein the screening module screens a target current load that matches the operating temperature from a set of predetermined current load rates. The rate method is specific: determining the working temperature range corresponding to the working temperature from a set of predetermined temperature ranges; A current loading rate matching the operating temperature range is selected from a predetermined set of current loading rates as a target current loading rate matching the operating temperature. 32. The device for determining the output power of a fuel cell according to claim 25, wherein the screening module screens a target current load that matches the operating temperature from a set of predetermined current load rates. The rate method is specific: determining the working temperature range corresponding to the working temperature from a set of predetermined temperature ranges; A current loading rate matching the operating temperature range is selected from a predetermined set of current loading rates as a target current loading rate matching the operating temperature. 33. The device for determining the output power of a fuel cell according to claim 27, wherein the screening module screens a target current load matching the operating temperature from a set of predetermined current load rates. The rate method is specific: determining the working temperature range corresponding to the working temperature from a set of predetermined temperature ranges; A current loading rate matching the operating temperature range is selected from a predetermined set of current loading rates as a target current loading rate matching the operating temperature. 34. The device for determining the output power of the fuel cell according to claim 20, 21, 22, 26, 28, 29, 31, 32 or 33, characterized in that the acquisition module is also used to judge in the judgment module Before whether the voltage difference between the real-time voltage and the preset voltage single low threshold is less than or equal to the preset voltage difference, the voltage single low threshold corresponding to the working temperature is obtained; The determining module is also used to determine that the voltage single low threshold is a preset voltage single low threshold, and trigger the judging module to execute the judgment whether the voltage difference between the real-time voltage and the preset voltage single low threshold is Operation less than or equal to the preset voltage difference. 35. The device for determining the output power of a fuel cell according to claim 23, wherein the acquisition module is also used to determine whether the voltage difference between the real-time voltage and the preset voltage single low threshold is Before being less than or equal to the preset voltage difference, obtain a voltage single low threshold corresponding to the working temperature; The determining module is also used to determine that the voltage single low threshold is a preset voltage single low threshold, and trigger the judging module to execute the judgment whether the voltage difference between the real-time voltage and the preset voltage single low threshold is Operation less than or equal to the preset voltage difference. 36. The device for determining the output power of a fuel cell according to claim 25, wherein the acquisition module is also used to determine whether the voltage difference between the real-time voltage and the preset voltage single low threshold is Obtaining a single low voltage threshold corresponding to the operating temperature before being less than or equal to a preset voltage difference; The determining module is also used to determine that the voltage single low threshold is a preset voltage single low threshold, and trigger the judging module to execute the judgment whether the voltage difference between the real-time voltage and the preset voltage single low threshold is Operation less than or equal to the preset voltage difference. 37. The device for determining the output power of a fuel cell according to claim 27, wherein the acquisition module is also used to determine whether the voltage difference between the real-time voltage and the preset voltage single low threshold is Before being less than or equal to the preset voltage difference, obtain a voltage single low threshold corresponding to the working temperature; The determining module is also used to determine that the voltage single low threshold is a preset voltage single low threshold, and trigger the judging module to execute the judgment whether the voltage difference between the real-time voltage and the preset voltage single low threshold is Operation less than or equal to the preset voltage difference. 38. The device for determining the output power of a fuel cell according to claim 30, wherein the acquisition module is also used to determine whether the voltage difference between the real-time voltage and the preset voltage single low threshold is Before being less than or equal to the preset voltage difference, obtain a voltage single low threshold corresponding to the operating temperature; The determining module is also used to determine that the voltage single low threshold is a preset voltage single low threshold, and trigger the judging module to execute the judgment whether the voltage difference between the real-time voltage and the preset voltage single low threshold is Operation less than or equal to the preset voltage difference. 39. A device for determining the output power of a fuel cell, characterized in that the device for determining comprises: a memory storing executable program code; a processor coupled to the memory; The processor invokes the executable program code stored in the memory to execute the method for determining the output power of the fuel cell according to any one of claims 1-19.

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