Method and device for controlling output power of hydrogen fuel cell

Abstract

The invention provides a method and a device for controlling the output power of a hydrogen fuel cell, relates to the technical field of fuel cells, and mainly aims to improve the output power of the hydrogen fuel cell. According to the main technical scheme, a power adjusting instruction of the hydrogen fuel cell is obtained, wherein the power adjusting instruction is used for adjusting the output power of the cell when the vehicle is in the plateau environment; environment parameters and required power of vehicle driving are collected according to the power adjusting instruction; calculating a target air flow by using the environmental parameters, the required power and a preset air flow model; and adjusting the air compressor according to the target air flow so as to control the output power of the hydrogen fuel cell to meet the required power. The invention is used for controlling the output power of the hydrogen fuel cell to meet the required power.

Description

Technical Field

[0001] The present disclosure relates to the technical field of fuel cells, and in particular to a method and device for controlling the output power of a hydrogen fuel cell. Background Art

[0002] When hydrogen fuel cells provide energy for cars, hydrogen and oxygen are reacted in the fuel cell to generate electricity. This process is more efficient than traditional internal combustion engines, and the only exhaust gas is water, making it efficient and environmentally friendly. In order to maintain driving, hydrogen fuel cell vehicles need to continuously obtain air during driving to provide enough oxygen to maintain the normal operation of the hydrogen fuel cell.

[0003] At present, during the driving process of a car, the power demand of the hydrogen fuel cell is used to calculate the amount of oxygen required for a complete reaction in theory according to the electrochemical reaction principle of the hydrogen fuel cell, and then the required air flow obtained through the intake duct is determined.

[0004] However, compared with the plain environment, the atmospheric pressure and temperature in the plateau environment are lower, which in turn affects the density and fluidity of the air, making the air thinner. Even if the air flow rate is the same, the actual amount of oxygen provided may be insufficient. Therefore, in the plateau environment, the air flow rate obtained by the above method of determining the required air flow rate is inaccurate, and running the hydrogen fuel cell will cause the output power of the hydrogen fuel cell to decrease, which cannot meet the power requirements of the entire vehicle. Summary of the invention

[0005] A technical problem to be solved by the present disclosure is to increase the output power of the hydrogen fuel cell when the hydrogen fuel cell vehicle is driven in a plateau environment.

[0006] In order to solve the above technical problems, the embodiments of the present disclosure provide a method and device for controlling the output power of a hydrogen fuel cell.

[0007] In some embodiments, the present disclosure provides a method for controlling the output power of a hydrogen fuel cell, comprising:

[0008] Obtaining a power adjustment command of a hydrogen fuel cell, which is used to adjust the battery output power when the vehicle is in a plateau environment;

[0009] Collect vehicle driving environment parameters and required power according to power adjustment instructions;

[0010] Calculate the target air flow rate using environmental parameters, required power and a preset air flow model;

[0011] The air compressor is adjusted according to the target air flow to control the output power of the hydrogen fuel cell to meet the required power.

[0012] In some embodiments, the above-mentioned method for controlling the output power of a hydrogen fuel cell, wherein the air compressor is adjusted according to the target air flow, comprises:

[0013] Querying the target air compressor speed corresponding to the target air flow rate according to a preset table, wherein the preset table is a table recording the relationship between the air flow rate and the air compressor speed that is regularly updated;

[0014] Adjust the air compressor speed to the target air compressor speed.

[0015] In some embodiments, the above-mentioned method for controlling the output power of a hydrogen fuel cell further includes:

[0016] After the air compressor is adjusted to the target air compressor speed, the actual air flow of the air compressor is detected;

[0017] Determining whether a difference between an actual air flow rate and a target air flow rate is less than a preset difference;

[0018] If so, the hydrogen fuel cell is controlled to maintain the current output power;

[0019] If not, based on the difference between the target air flow and the actual air flow, the proportional-integral control algorithm is used to adjust the speed of the air compressor until the difference between the target air flow and the actual air flow is less than the preset difference.

[0020] In some embodiments, the above-mentioned method for controlling the output power of a hydrogen fuel cell further includes:

[0021] Acquire test data, which includes multiple groups of test environment parameters and test required power, as well as corresponding air flow rates;

[0022] Establishing a polynomial regression model according to the received polynomial order;

[0023] Each group of test environment parameters and test required power is taken as input, and the corresponding air flow of each group is taken as output. The polynomial regression model is trained to generate the air flow model.

[0024] In some embodiments, the above-mentioned method for controlling the output power of a hydrogen fuel cell, wherein obtaining test data comprises:

[0025] Use the hydrogen fuel cell test chamber to set multiple groups of test environment parameters and test required power;

[0026] According to each set of test environment parameters and test required power, adjust the air flow to meet the test required power;

[0027] The test environment parameters, test required power, and corresponding air flow are recorded in groups to generate test data.

[0028] In some embodiments, the above-mentioned method for controlling the output power of a hydrogen fuel cell, wherein, before calculating the target air flow rate using environmental parameters, required power and a preset air flow model, further comprises:

[0029] Determine whether the atmospheric pressure in the environmental parameters is less than a preset pressure value and / or whether the atmospheric temperature in the environmental parameters is less than a preset temperature value;

[0030] If yes, then calculate the target air flow;

[0031] If not, the hydrogen fuel cell is controlled to maintain the current output power.

[0032] In some embodiments, the above-mentioned method for controlling the output power of a hydrogen fuel cell further includes:

[0033] After the output power of the hydrogen fuel cell is controlled to meet the required power, it is determined whether a shutdown instruction is received;

[0034] If yes, stop adjusting the output power of the hydrogen fuel cell;

[0035] If not, then collect the vehicle's driving environment parameters and required power.

[0036] In some embodiments, the present disclosure provides a hydrogen fuel cell output power control device, comprising:

[0037] An acquisition unit, used for acquiring a power adjustment instruction of a hydrogen fuel cell, the power adjustment instruction being used for adjusting the battery output power when the vehicle is in a plateau environment;

[0038] A collection unit, used for collecting environmental parameters and required power of the vehicle according to the power adjustment instruction obtained by the acquisition unit;

[0039] A calculation unit, used to calculate a target air flow rate by using the environmental parameters, required power and a preset air flow model collected by the collection unit;

[0040] The regulating unit is used to regulate the air compressor according to the target air flow obtained by the calculating unit, so as to control the output power of the hydrogen fuel cell to meet the required power.

[0041] In some embodiments, the above-mentioned hydrogen fuel cell output power control device, wherein the regulating unit includes:

[0042] A query module, used to query the target air compressor speed corresponding to the target air flow according to a preset table, wherein the preset table is a table recording the relationship between the air flow and the air compressor speed that is regularly updated;

[0043] The first regulating module is used to regulate the rotation speed of the air compressor to the target air compressor rotation speed queried by the query module.

[0044] In some embodiments, the above-mentioned hydrogen fuel cell output power control device, wherein the regulating unit further comprises:

[0045] A detection module, used for detecting the actual air flow of the air compressor after the air compressor is adjusted to a target air compressor speed;

[0046] A judging module, used to judge whether the difference between the actual air flow detected by the detecting module and the target air flow is less than a preset difference;

[0047] A control module, configured to control the hydrogen fuel cell to maintain a current output power if the judgment module judges that the difference between the actual air flow rate and the target air flow rate is less than a preset difference;

[0048] The second adjustment module is used to adjust the speed of the air compressor using a proportional-integral adjustment algorithm based on the difference between the target air flow and the actual air flow, if the judgment module determines that the difference between the actual air flow and the target air flow is not less than the preset difference, until the difference between the target air flow and the actual air flow is less than the preset difference.

[0049] In some embodiments, the above-mentioned hydrogen fuel cell output power control device further includes a generation unit, including:

[0050] An acquisition module is used to acquire test data, the test data including multiple groups of test environment parameters and test required power, and corresponding air flow;

[0051] A building module for building a polynomial regression model according to the received polynomial order;

[0052] The training module is used to take each group of test environment parameters and test required power obtained by the acquisition module as input and each group of corresponding air flow as output, train the polynomial regression model, and generate an air flow model.

[0053] In some embodiments, the above-mentioned hydrogen fuel cell output power control device, wherein the acquisition module includes:

[0054] Setting submodules for setting multiple groups of test environment parameters and test required power using a hydrogen fuel cell test chamber;

[0055] The adjustment submodule is used to adjust the air flow rate according to each group of test environment parameters and test required power set by the setting submodule to meet the test required power;

[0056] The generation submodule is used to record the test environment parameters and test demand power obtained by the adjustment submodule in groups, as well as the corresponding air flow rate, to generate test data.

[0057] In some embodiments, the above-mentioned hydrogen fuel cell output power control device further includes a judgment unit, including:

[0058] A judgment module, used to judge whether the atmospheric pressure in the environmental parameters is less than a preset pressure value and / or whether the atmospheric temperature in the environmental parameters is less than a preset temperature value;

[0059] an execution module, configured to execute calculation of a target air flow rate if the judgment module determines that the atmospheric pressure in the environmental parameter is less than a preset pressure value and / or the atmospheric temperature in the environmental parameter is less than a preset temperature value;

[0060] The control module is used to control the hydrogen fuel cell to maintain the current output power if the judgment module judges that the atmospheric pressure in the environmental parameters is not less than a preset pressure value and / or the atmospheric temperature in the environmental parameters is not less than a preset temperature value.

[0061] In some embodiments, the above-mentioned hydrogen fuel cell output power control device further includes a stop unit, including:

[0062] A judgment module, used to judge whether a shutdown instruction is received after controlling the output power of the hydrogen fuel cell to meet the required power;

[0063] A stop module, used for stopping adjusting the output power of the hydrogen fuel cell if the judgment module determines that a shutdown instruction has been received;

[0064] The execution module is used for collecting the environmental parameters and required power of the vehicle when the judgment module determines that the shutdown instruction has not been received.

[0065] In some embodiments, the present disclosure provides a computing device, which includes: at least one processor, and a memory, wherein the memory stores instructions that can be executed by the processor, and the instructions are executed by the processor, so that the processor can execute the above-mentioned method for controlling the output power of a hydrogen fuel cell.

[0066] In some embodiments, the present disclosure provides a readable storage medium, wherein the readable storage medium is used to store a computer program, wherein when the computer program is running, the device where the storage medium is located is controlled to execute the above-mentioned method for controlling the output power of a hydrogen fuel cell.

[0067] Through the above technical solution, the present disclosure provides a method and device for controlling the output power of a hydrogen fuel cell, which has at least the following advantages:

[0068] The present disclosure takes into account that when a hydrogen fuel cell vehicle is driving in a plateau environment, it is necessary to compensate the battery for additional output power, while in a plain environment, the output power of the battery can usually meet the required power. Therefore, this solution obtains the power adjustment instruction of the hydrogen fuel cell to determine that the vehicle has currently driven to a plateau environment. At this time, the battery output power needs to be adjusted to meet the vehicle power demand. After receiving the power adjustment instruction, the environmental parameters and the required power during vehicle driving are collected, and the environmental parameters, the required power and the preset air flow model are used to calculate the specific environmental parameter values ​​and the target air flow corresponding to the required power in the current environment. During the establishment process, the preset air flow model can analyze the corresponding relationship between the environmental parameters, the required power and the required air flow according to each simulated numerical value, so after receiving the environmental parameters and the required power, the current required target air flow can be accurately predicted. In addition, due to driving in a plateau environment, the environmental parameters of the vehicle may be constantly changing, and the air flow model can be used to calculate the target air flow corresponding to the current environmental parameters in real time. Then, based on the correspondence between the target air flow and the air compressor performance, the air compressor is adjusted so that the air flow of the acquired air reaches the target air flow, so that the amount of oxygen provided to the hydrogen fuel cell can meet the operation requirements of the hydrogen fuel cell, so as to control the output power of the hydrogen fuel cell to meet the required power, thereby achieving the goal of increasing the output power of the hydrogen fuel cell by accurately adjusting the air flow in a plateau environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0070] Figure 1 is a flow chart of a method for controlling the output power of a hydrogen fuel cell disclosed in an embodiment of the present disclosure;

[0071] Figure 2 is a flow chart of another method for controlling the output power of a hydrogen fuel cell disclosed in an embodiment of the present disclosure;

[0072] Figure 3 It is a schematic diagram of the structure of a control device for output power of a hydrogen fuel cell disclosed in an embodiment of the present disclosure;

[0073] Figure 4 It is a schematic diagram of the structure of another control device for the output power of a hydrogen fuel cell disclosed in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0074] The following is a further detailed description of the embodiments of the present disclosure in conjunction with the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0075] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0076] It should be noted that, in the description of the present disclosure, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0077] In addition, the words "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0078] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0079] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such herein.

[0080] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0081] At present, when driving, hydrogen fuel cell vehicles will obtain the required power according to the vehicle speed, road conditions and vehicle load conditions, determine the current that the fuel cell needs to output according to the required power and the voltage characteristics of the fuel cell, and then calculate the amount of hydrogen and oxygen required to produce the required output current according to the stoichiometric ratio of the electrochemical reaction. The required air flow rate can be determined based on the required amount of oxygen. However, this method of determining the air flow rate is only applicable to meeting the power requirements of vehicles in plain environments. When the car travels to a plateau environment, due to the high altitude, the atmospheric pressure and temperature are reduced, which affects the air density and reduces the oxygen content in the air. Compared with the plain environment, even with the same air flow, the oxygen content obtained is different. Insufficient oxygen content will eventually lead to a reduction in the output power of the hydrogen fuel cell, which cannot meet the power requirements of the entire vehicle. Therefore, the inventor of this case believes that when calculating the air flow in a plateau environment, it is necessary not only to consider some factors in determining the air flow in a plain environment, but more importantly, the impact of environmental factors in the plateau environment on the air flow. The inventor of this case preset a mathematical model suitable for the relationship by analyzing the correlation between environmental factors, vehicle power required and air flow, and simulated the different environmental parameters that may be generated in the plateau environment. After repeated debugging, the different air flows corresponding to different environmental parameters and different required powers were determined. The mapping relationship between air flow, environmental parameters and required power was simulated and analyzed through the preset mathematical model to form an air flow model, which can more accurately determine the air flow required for hydrogen fuel cell vehicles in different environments, thereby achieving an increase in the output power of hydrogen fuel cells so that they can meet the vehicle's required power.

[0082] To this end, the inventor of this case has proposed a method for controlling the output power of a hydrogen fuel cell. After receiving a power adjustment instruction, the method can determine the target air flow rate according to the collected environmental parameters and the required power, and adjust the air compressor according to the target air flow rate, so as to control the output power of the hydrogen fuel cell to meet the required power. The method for controlling the output power of a hydrogen fuel cell in the embodiment of the present disclosure has the following specific steps: Figure 1 As shown, including:

[0083] 101. Obtain power adjustment instructions for the hydrogen fuel cell.

[0084] When the car is driving in a plain environment, the method used to determine the air flow rate can make the output power of the hydrogen fuel cell meet the vehicle's required power, and there is no need for additional output power compensation of the battery. And considering that if the battery output power is adjusted due to sudden changes in external instantaneous environmental factors, it will lead to excessive sensitivity. The air flow obtained according to the environmental parameters at the moment is too large. When the environmental parameters immediately return to normal values, excessive oxygen is not required. The series of operations performed are useless, but instead cause a waste of resources. Based on this, it is necessary to set a power adjustment instruction for the hydrogen fuel cell, which is used to adjust the battery output power when the vehicle is in a plateau environment.

[0085] The power adjustment command of the hydrogen fuel cell obtained can be manually turned on by the driver when he / she determines that the battery power adjustment needs to be turned on according to the external environment; or it can be detected by the satellite positioning system or laser radar, and the vehicle control unit (VCU) monitors in real time whether the current altitude meets the plateau environment. If so, the driver is reminded to turn on the battery output power adjustment switch through the vehicle's central control screen, or the output power adjustment command is automatically generated. Among them, the altitude that meets the plateau environment is generally set to 1000 meters, which can be appropriately adjusted according to the performance of the hydrogen fuel cell, such as 900 meters or 1100 meters, and no restrictions are made here.

[0086] 102. Collect the environmental parameters and required power of the vehicle according to the power adjustment instruction.

[0087] After receiving the power adjustment instruction of the hydrogen fuel cell, the air flow required for the operation of the hydrogen fuel cell will be determined according to the current environment of the vehicle. Therefore, it is necessary to collect specific environmental parameters and the current required power of the vehicle, and the required output power of the hydrogen fuel cell can be determined according to the required power. Among them, the environmental parameters include at least the atmospheric pressure and may also include the atmospheric temperature. The atmospheric pressure can be collected by the atmospheric pressure sensor, and the atmospheric temperature can be collected by the atmospheric temperature sensor.

[0088] When collecting environmental parameters, the atmospheric pressure sensor and the atmospheric temperature sensor may be turned on to collect atmospheric pressure and atmospheric temperature only after receiving the power adjustment instruction, or the atmospheric pressure sensor and the atmospheric temperature sensor may be turned on all the time to collect atmospheric pressure and atmospheric temperature in real time, and the data collected during the vehicle driving process is stored in a preset data table, and when the power adjustment instruction is received, the current environmental parameters are queried in the preset data table. The environmental parameters collected in real time may also be stored in association with the current location and altitude of the vehicle, so as to record the corresponding relationship between the vehicle location and the environmental parameters, and continuously optimize the hydrogen fuel cell output power control system according to the recorded corresponding relationship.

[0089] When collecting the required power, the speed sensor, acceleration sensor and pressure sensor used to measure the driving wheel pressure installed on the vehicle are used to collect various driving data of the vehicle in real time, and the power consumption caused by the internal accessories of the vehicle, such as air conditioners and heaters, is collected. The Electronic Control Unit (ECU) processes and analyzes the collected data and calculates the current required power of the vehicle in combination with the power consumption of the accessories.

[0090] 103. Calculate the target air flow rate using environmental parameters, required power and a preset air flow model.

[0091] The preset air flow model in this solution can calculate the target air flow required at this time based on the correspondence between the air flow obtained through training, environmental parameters, and required power, and based on the known environmental parameters and required power. When the output power of the hydrogen fuel cell needs to be adjusted, the collected environmental parameters and required power are input into the air flow model, and the air flow model will output a corresponding target air flow.

[0092] It should be noted that in order to be able to timely adjust the output power of the hydrogen fuel cell to meet the required power when the vehicle is traveling in a plateau environment, when judging whether the vehicle is traveling in a plateau environment, that is, when obtaining the power adjustment instruction of the hydrogen fuel cell, the preset plateau environment judgment condition may make the vehicle obtain the power adjustment instruction earlier. And in order to avoid manually starting the power adjustment instruction too early, this solution can also preset a calculation condition before calculating the target air flow according to the air flow model to determine whether the collected environmental parameters have met the conditions for calculating the target air flow, that is, to determine whether the current environmental parameters actually meet the environment for adjusting the battery output power.

[0093] In addition to the above-mentioned judgment on whether it is necessary to calculate the target air flow before calculating the air flow, the present solution can also allow only the vehicle control unit to automatically generate a power adjustment instruction when obtaining the power adjustment instruction of the hydrogen fuel cell. At this time, the judgment should be made not only based on the altitude, but also based on the environmental parameters, so that after obtaining the power adjustment instruction, the target air flow can be calculated immediately based on the collected environmental parameters and required power.

[0094] 104. Adjust the air compressor according to the target air flow rate to control the output power of the hydrogen fuel cell to meet the required power.

[0095] In this solution, air flow refers to the mass of air entering the air compressor per unit time, and the size of the air flow is affected by the speed of the air compressor. When the speed of the air compressor is higher, the air flow obtained will be larger. Therefore, when the target air flow is known, the air flow can be adjusted by adjusting the speed of the air compressor to achieve the target air flow, so that the hydrogen fuel cell can fully carry out electrochemical reactions according to the air compressed and transported by the air compressor to output power that meets the demand. When judging whether the battery output power meets the required power, it is judged based on whether the difference between the output power and the required power meets the preset power difference.

[0096] When adjusting the air compressor according to the target air flow, the air compressor speed corresponding to the target air flow can be calculated in real time and adjusted based on the correspondence between the target air flow and the air compressor speed; or a preset table in which the air compressor speed value corresponds to the air flow value one by one is preset, and the air compressor speed corresponding to the target air flow is queried according to the preset table and adjusted.

[0097] Based on the above Figure 1 It can be seen from the implementation method that this solution only starts adjusting the battery output power when the hydrogen fuel cell adjustment instruction is obtained, so as to more accurately determine that the vehicle has traveled to the plateau environment and reduce temporary erroneous activation caused by sudden environmental factors in the plain environment. After determining that the battery output power needs to be adjusted, not only the required power required by the current vehicle is collected, but also the environmental parameters of the current environment are collected. Using the preset air flow model, the target air flow can be calculated in real time based on the collected environmental parameters and required power, and the actual required air flow can be accurately determined based on the impact of the environmental parameters on the air flow. Finally, the air compressor is adjusted according to the corresponding relationship between the target air flow and the air compressor, so as to control the output power of the hydrogen fuel cell in real time to meet the required power, so that even if the vehicle is traveling in a plateau environment with unstable environmental parameters, the actual required air flow can be accurately obtained, thereby improving the output power of the hydrogen fuel cell in the plateau environment.

[0098] In some embodiments, according to the above Figure 1 Regarding the more specific process of adjusting the output power of hydrogen fuel according to the power adjustment instruction, the embodiment of the present disclosure will be described in more detail, and the specific steps are as follows: Figure 2 As shown, including:

[0099] 201. Obtain power adjustment instructions for the hydrogen fuel cell.

[0100] In this embodiment, the condition for obtaining the power adjustment instruction of the hydrogen fuel cell only includes that the altitude meets the preset altitude. At this time, it is determined that the vehicle is driving in a plateau environment, and the power adjustment instruction is automatically generated by the vehicle control unit and sent to the control unit (Fuel-cell Control Unit, FCU) of the fuel cell system.

[0101] 202. Collect environmental parameters and required power of the vehicle according to the power adjustment instruction.

[0102] When the control unit of the fuel cell system receives the power adjustment command sent by the vehicle control unit, it starts to collect the environmental parameters and required power during vehicle driving. The environmental parameters in this solution include atmospheric pressure and atmospheric temperature. In this embodiment, the atmospheric pressure sensor and atmospheric temperature sensor are used to collect the atmospheric pressure and atmospheric temperature in real time, and the collected data are stored in a preset data table. When the power adjustment command is received, the pressure data and temperature data collected last time are queried from the data table.

[0103] 203. Determine whether the atmospheric pressure in the environmental parameters is less than a preset pressure value and / or whether the atmospheric temperature in the environmental parameters is less than a preset temperature value.

[0104] Since the atmospheric pressure and atmospheric temperature collected in real time are stored in a preset data table, the preset data table is monitored in real time to determine whether the atmospheric pressure and atmospheric temperature in the preset data table have affected the acquisition of the air flow, that is, whether the conditions for adjusting the battery output power are met. Among them, it can be first determined whether the atmospheric pressure is less than the preset pressure value. If so, it is then determined whether the atmospheric temperature is less than the preset temperature value. When both are less than the preset threshold, the atmospheric pressure, atmospheric temperature and required power are used to calculate the target air flow through a preset air flow model. It can also be that as long as the atmospheric pressure is less than the preset pressure value, or as long as the atmospheric temperature is less than the preset temperature value, it is determined that the battery output power needs to be adjusted at this time, that is, the atmospheric pressure, atmospheric temperature and required power are used to calculate the target air flow through a preset air flow model.

[0105] When the atmospheric pressure and the atmospheric temperature do not reach the preset threshold, it is considered that the atmospheric pressure and the atmospheric temperature are not sufficient to cause the obtained air flow to cause the hydrogen fuel cell to fail to meet the required power. In this case, the hydrogen fuel cell can be controlled to maintain the current output power.

[0106] 204. Calculate the target air flow rate using the environmental parameters, the required power and the preset air flow rate model.

[0107] The air flow model in this step is a mathematical model established based on the test data obtained in the hydrogen fuel cell test cabin. Multiple groups of test environment parameters and test demand power are set in the hydrogen fuel cell test cabin to simulate the demand power that may be generated by the vehicle in a plateau environment, as well as the different atmospheric pressures and atmospheric temperatures caused by different altitudes and different weather. According to the set test atmospheric pressure, test atmospheric temperature and test demand power, the air flow is gradually adjusted. It can be to set an approximate initial air flow according to artificial experience, or to calculate the initial air flow according to the air flow calculation method under the plain environment, and then set an adjustment flow value, and adjust it successively. For example, the air flow is increased by 1g / s each time until the adjusted air flow can make the battery output power meet the demand power. The adjustment flow value can be 1g / s or 2g / s, and the specific value is limited according to the actual test situation. When the corresponding air flow is adjusted according to a set of test atmospheric pressure, test atmospheric temperature and test demand power, this set of data is recorded one by one in the test data table. When multiple sets of test environment parameters and test demand power have obtained the corresponding air flow, the test data is generated.

[0108] The air flow model in the present disclosure can be a multiple linear regression model or a polynomial regression model, as long as it is a model that can simulate the corresponding relationship between environmental parameters, power demand and air flow. In this embodiment, the air flow model is a polynomial regression model, and the polynomial regression model is established according to the polynomial order set by the received staff, and the test data is associated with the polynomial variables, that is, the environmental parameters and the test power demand are used as input variables, and the corresponding air flow is used as the output variable. The polynomial regression model is trained to analyze the corresponding relationship between the environmental parameters, the power demand and the air flow, and generate the air flow model.

[0109] After the collected environmental parameters and required power are input into the air flow model, the air flow model will output the corresponding target air flow.

[0110] 205. Adjust the speed of the air compressor according to the target air flow.

[0111] In this step, after the target air flow is calculated, the target air compressor speed corresponding to the target air flow is queried by querying the preset table, and the air compressor is adjusted to reach the target air compressor speed. Wherein, in the above step 204, when measuring the relationship between environmental parameters, power demand and air flow, the way to adjust the air flow can be to achieve by adjusting the air compressor speed, and record the corresponding relationship between the air compressor speed and the air flow. In order to continuously optimize the corresponding relationship between environmental parameters, power demand and air flow, after simulating its mathematical relationship using the air flow model, it is also necessary to continuously test and continuously optimize the air flow model according to the updated test data. While the test data of each environmental parameter, power demand and air flow are updated, the relationship between air flow and air compressor speed is also synchronously recorded and updated, and the updated data is regularly updated to the preset table. It can be to set an update cycle, automatically query whether there is updated data in the database recording the test data every other update cycle, if there is, it is automatically synchronized to the preset table, and all data in the preset table are deduplicated after updating. It can also be a database that monitors and records test data in real time. When there is an update to the correspondence between air flow and air compressor speed, it is matched with the existing data in the preset table to determine whether it is duplicate data. If it is duplicate, it will not be updated to the preset table. If it is new data, it will be updated to the preset table so that the updated data can be synchronized to the preset table in time.

[0112] After adjusting the air compressor to the target air compressor speed according to the target air flow, in order to more accurately control the output power of the hydrogen fuel cell to meet the required power, the air flow meter is also used to detect the actual air flow at this time, and the difference between the actual air flow and the target air flow is less than the preset difference to determine whether the actual air flow meets the target air flow. Among them, the preset difference can be 3g / s or 2g / s, and the specific value is set according to the actual situation. If the difference between the actual air flow and the target air flow is less than the preset difference, it is considered that the actual air flow at this time can make the output power of the hydrogen fuel cell meet the required power of the vehicle, and the hydrogen fuel cell is controlled to maintain the current output power; if the difference between the actual air flow and the target air flow is not less than the preset difference, the air compressor speed needs to be adjusted until the actual air flow meets the target air flow. When adjusting the air compressor speed again, the proportional integral adjustment algorithm can be used, according to the preset gain coefficient, based on the difference between the target air flow and the actual air flow, the air compressor speed is adaptively adjusted until the difference between the actual air flow measured by the air flow meter and the target air flow is less than the preset difference.

[0113] 206. If no shutdown command is received after the output power of the hydrogen fuel cell is controlled to meet the required power, the environmental parameters of the vehicle driving and the required power are collected again.

[0114] In this embodiment, the power adjustment instruction of the hydrogen fuel cell can be manually turned on or off. When the driver determines that the output power of the hydrogen fuel cell does not need to be adjusted at this time, the battery power adjustment function can be manually turned off at any time. It can also be judged whether a shutdown instruction is received after the output power of the hydrogen fuel cell is controlled according to the target air flow to meet the required power. The shutdown instruction can be automatically generated when the vehicle control unit detects that the current altitude of the vehicle belongs to the plain. If the shutdown instruction is received, the adjustment of the output power of the hydrogen fuel cell is stopped; if the shutdown instruction is not received, the environmental parameters of the vehicle driving are collected from the environmental parameter data table again, and the required power is collected according to the vehicle driving data, and it is judged again whether the environmental parameters at this time are less than the preset threshold value. When the atmospheric pressure is less than the preset pressure value and / or the atmospheric temperature is less than the preset temperature value, the new target air flow is calculated again, and the air compressor speed is adjusted to obtain the air of the target air flow. Among them, if the collected environmental parameters are not less than the preset threshold value, the adjustment of the hydrogen fuel cell power can be automatically turned off, that is, there is no need to continue to calculate the target air flow. If the environmental parameters collected each time meet the preset threshold, the steps of calculating the target air flow and adjusting the air compressor speed are executed cyclically.

[0115] Based on the above Figure 2 It can be seen from the implementation method that in this embodiment, by judging whether the current environment needs to adjust the output power of the hydrogen fuel cell based on the atmospheric pressure and atmospheric temperature, the scene where the battery output power needs to be adjusted can be determined more accurately. According to the two stages of adjusting the air compressor speed, the actual air flow can meet the target air flow more quickly and accurately. Through the continuous cycle of adjustment in this embodiment, the output power of the hydrogen fuel cell can be controlled in real time according to the current environmental parameters to meet the vehicle's changing power requirements.

[0116] In some embodiments, as a Figure 1 , 2 The embodiment of the method shown in the figure is implemented. The embodiment of the present disclosure provides a control device for the output power of a hydrogen fuel cell, which is used to control the output power of the hydrogen fuel cell to meet the required power. The embodiment of the device corresponds to the aforementioned method embodiment. For ease of reading, this embodiment will no longer repeat the details of the aforementioned method embodiment one by one, but it should be clear that the device in this embodiment can correspond to all the contents of the aforementioned method embodiment. Specifically, Figure 3 As shown, the device comprises:

[0117] An acquisition unit 31 is used to acquire a power adjustment instruction of a hydrogen fuel cell, where the power adjustment instruction is used to adjust the battery output power when the vehicle is in a plateau environment;

[0118] The collecting unit 32 is used to collect the environmental parameters and required power of the vehicle according to the power adjustment instruction obtained by the obtaining unit 31;

[0119] The calculation unit 33 is used to calculate the target air flow rate by using the environmental parameters, the required power and the preset air flow model collected by the collection unit 32;

[0120] The regulating unit 34 is used to regulate the air compressor according to the target air flow obtained by the calculating unit 33, so as to control the output power of the hydrogen fuel cell to meet the required power.

[0121] In some embodiments, Figure 4 As shown, the adjustment unit 34 includes:

[0122] A query module 341 is used to query the target air compressor speed corresponding to the target air flow rate according to a preset table, where the preset table is a table recording the relationship between the air flow rate and the air compressor speed that is regularly updated;

[0123] The first regulating module 342 is used to regulate the speed of the air compressor to the target air compressor speed queried by the query module 341 .

[0124] In some embodiments, Figure 4 As shown, the adjustment unit 34 also includes:

[0125] The detection module 343 is used to detect the actual air flow of the air compressor after the air compressor is adjusted to the target air compressor speed;

[0126] A judging module 344 is used to judge whether the difference between the actual air flow rate detected by the detecting module 343 and the target air flow rate is less than a preset difference;

[0127] The control module 345 is used to control the hydrogen fuel cell to maintain the current output power if the judgment module 344 judges that the difference between the actual air flow rate and the target air flow rate is less than the preset difference;

[0128] The second adjustment module 346 is used to adjust the speed of the air compressor using a proportional-integral adjustment algorithm based on the difference between the target air flow and the actual air flow, if the judgment module 344 determines that the difference between the actual air flow and the target air flow is not less than the preset difference, until the difference between the target air flow and the actual air flow is less than the preset difference.

[0129] In some embodiments, Figure 4 As shown, the device also includes a generating unit 35, including:

[0130] An acquisition module 351 is used to acquire test data, where the test data includes multiple groups of test environment parameters and test required power, as well as corresponding air flow rates;

[0131] Establishing module 352, for establishing a polynomial regression model according to the received polynomial order;

[0132] The training module 353 is used to take each group of test environment parameters and test required power obtained by the acquisition module 351 as input and each group of corresponding air flow as output, train a polynomial regression model, and generate an air flow model.

[0133] In some embodiments, Figure 4 As shown, the acquisition module 351 includes:

[0134] A setting submodule 3511 is used to set multiple groups of test environment parameters and test required power using a hydrogen fuel cell test chamber;

[0135] The adjustment submodule 3512 is used to adjust the air flow rate according to each set of test environment parameters and test required power set by the setting submodule 3511 to meet the test required power;

[0136] The generating submodule 3513 is used to record the test environment parameters and the test required power obtained by the adjusting submodule 3512 in groups, as well as the corresponding air flow rate, to generate test data.

[0137] In some embodiments, Figure 4 As shown, the device also includes a judgment unit 36, including:

[0138] A determination module 361 is used to determine whether the atmospheric pressure in the environmental parameters is less than a preset pressure value and / or whether the atmospheric temperature in the environmental parameters is less than a preset temperature value;

[0139] An execution module 362, configured to calculate a target air flow rate if the determination module 361 determines that the atmospheric pressure in the environmental parameter is less than a preset pressure value and / or the atmospheric temperature in the environmental parameter is less than a preset temperature value;

[0140] The control module 363 is used to control the hydrogen fuel cell to maintain the current output power if the judgment module 361 judges that the atmospheric pressure in the environmental parameters is not less than a preset pressure value and / or the atmospheric temperature in the environmental parameters is not less than a preset temperature value.

[0141] In some embodiments, Figure 4 As shown, the device further includes a stopping unit 37, including:

[0142] A judgment module 371 is used to judge whether a shutdown instruction is received after the output power of the hydrogen fuel cell is controlled to meet the required power;

[0143] The stop module 372 is used to stop adjusting the output power of the hydrogen fuel cell if the judgment module 371 judges that a shutdown instruction is received;

[0144] The execution module 373 is used to collect the environmental parameters and required power of the vehicle if the judgment module 371 determines that no closing instruction has been received.

[0145] In some embodiments, the present disclosure also provides a computing device, the computing device comprising: at least one processor, and a memory, wherein the memory stores instructions that can be executed by the processor, and the instructions are executed by the processor, so that the processor can perform the above Figure 1 , 2 A method for controlling the output power of a hydrogen fuel cell.

[0146] In some embodiments, the present disclosure also provides a readable storage medium, which is used to store a computer program. When the computer program is running, the device where the storage medium is located is controlled to execute the above-mentioned Figure 1 , 2 A method for controlling the output power of a hydrogen fuel cell.

[0147] So far, various embodiments of the present disclosure have been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0148] Although some specific embodiments of the present disclosure have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present disclosure. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A method for controlling the output power of a hydrogen fuel cell, characterized in that: The method comprises: Obtaining a power adjustment instruction of a hydrogen fuel cell, wherein the power adjustment instruction is used to adjust the battery output power when the vehicle is in a plateau environment; Collecting the environmental parameters and required power of the vehicle according to the power adjustment instruction; Calculating a target air flow rate using the environmental parameters, required power, and a preset air flow rate model; The air compressor is adjusted according to the target air flow rate to control the output power of the hydrogen fuel cell to meet the required power.

2. The method according to claim 1, characterized in that Adjusting the air compressor according to the target air flow rate includes: Querying the target air compressor speed corresponding to the target air flow rate according to a preset table, wherein the preset table is a table recording the relationship between the air flow rate and the air compressor speed that is regularly updated; The speed of the air compressor is adjusted to the target air compressor speed.

3. The method according to claim 2, characterized in that The method further comprises: After the air compressor is adjusted to the target air compressor speed, detecting the actual air flow of the air compressor; Determining whether a difference between the actual air flow rate and the target air flow rate is less than a preset difference; If yes, controlling the hydrogen fuel cell to maintain the current output power; If not, based on the difference between the target air flow and the actual air flow, a proportional-integral control algorithm is used to adjust the speed of the air compressor until the difference between the target air flow and the actual air flow is less than the preset difference.

4. The method according to claim 1, characterized in that: The method further comprises: Acquiring test data, the test data including multiple groups of test environment parameters and test required power, and corresponding air flow rates; Establishing a polynomial regression model according to the received polynomial order; Each group of test environment parameters and test required power is taken as input, and each group of corresponding air flow is taken as output, and the polynomial regression model is trained to generate the air flow model.

5. The method according to claim 4, characterized in that The obtaining of test data comprises: Use the hydrogen fuel cell test chamber to set multiple groups of test environment parameters and test required power; According to each group of test environment parameters and test required power, adjusting the air flow rate to meet the test required power; The test environment parameters, test required power, and corresponding air flow are recorded in groups to generate the test data.

6. The method according to claim 1, characterized in that Before calculating the target air flow rate by using the environmental parameters, the required power and the preset air flow model, the method further includes: Determine whether the atmospheric pressure in the environmental parameter is less than a preset pressure value and / or whether the atmospheric temperature in the environmental parameter is less than a preset temperature value; If yes, then the calculation of the target air flow is performed; If not, the hydrogen fuel cell is controlled to maintain the current output power.

7. The method according to any one of claims 1 to 6, characterized in that: The method further comprises: After controlling the output power of the hydrogen fuel cell to meet the required power, determining whether a shutdown instruction is received; If yes, stop adjusting the output power of the hydrogen fuel cell; If not, the step of collecting the environmental parameters and required power of the vehicle is performed.

8. A control device for the output power of a hydrogen fuel cell, characterized in that: The device comprises: An acquisition unit, used for acquiring a power adjustment instruction of a hydrogen fuel cell, wherein the power adjustment instruction is used for adjusting the battery output power when the vehicle is in a plateau environment; A collection unit, configured to collect environmental parameters and required power of the vehicle according to the power adjustment instruction obtained by the acquisition unit; A calculation unit, used to calculate a target air flow rate by using the environmental parameters, required power and a preset air flow model collected by the collection unit; The regulating unit is used to regulate the air compressor according to the target air flow obtained by the calculating unit, so as to control the output power of the hydrogen fuel cell to meet the required power.

9. A computing device, characterized in that The computing device includes: at least one processor, and a memory, wherein the memory stores instructions executable by the processor, and the instructions are executed by the processor, so that the processor can execute a method for controlling the output power of a hydrogen fuel cell as described in any one of claims 1-7.

10. A readable storage medium, characterized in that: The readable storage medium is used to store a computer program, wherein when the computer program is running, it controls the device where the storage medium is located to execute a method for controlling the output power of a hydrogen fuel cell as described in any one of claims 1 to 7.

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