Fuel cell drainage control method and related equipment

Abstract

The invention provides a fuel cell drainage control method and related equipment, and relates to the technical field of fuel cell stacks, the method comprises the following steps: obtaining angular velocity information in multiple directions detected by a tilt angle sensor, the multiple directions including an automobile forward direction, an automobile lateral direction and an automobile vertical direction, the lateral direction of the automobile is perpendicular to the advancing direction of the automobile and located in the same horizontal plane with the advancing direction of the automobile. The vertical direction of the automobile is perpendicular to the advancing direction of the automobile and located in the same vertical plane with the advancing direction of the automobile. Performing data processing on the angular velocity information in the multiple directions to obtain inclination angle information in the multiple directions; and determining a corresponding drainage strategy based on a comparison result of the inclination angle information of the multiple directions and a preset angle threshold value. Therefore, under various complex road conditions, effective drainage of the fuel cell system can be ensured, the problems of pile flooding or low-temperature icing and the like caused by water accumulation are avoided, the service life of the fuel cell system is prolonged, and the performance of the fuel cell system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell stacks, and more specifically, to a fuel cell drainage control method, a fuel cell drainage control device, an electronic device, and a storage medium. Background Art

[0002] PEMFC fuel cell is a device that converts chemical energy into electrical energy through electrochemical reaction between hydrogen and oxygen in the air. At present, the application of fuel cell vehicles has become more and more extensive, and the requirements for fuel cell life and reliability will become higher and higher. When designing the fuel cell system, in order to improve the utilization efficiency of hydrogen and the reaction performance of the stack, the excess "waste hydrogen" "stacked out" from the anode will be recycled and mixed with new hydrogen, and then enter the stack again for reaction. Although water is generated at the cathode of the fuel cell when generating electricity, some water will still penetrate into the anode through the inside of the battery (Back Diffusion). If some water enters the stack again through circulation, it is very easy to cause water accumulation inside the battery anode, causing local "flooding". The accumulated liquid water will hinder the supply of hydrogen from the anode end to the membrane electrode, thereby reducing the power generation efficiency. In severe cases, the voltage of a single cell may even be "single low", causing the system to fail to operate normally or causing irreversible permanent damage to the single cell and the stack. Therefore, the hydrogen system needs to be drained when the fuel cell is working normally to avoid flooding and ensure reliable operation of the system. At the same time, corresponding purging is also required during the start and stop phases of the fuel cell to ensure that there is no residual moisture inside the fuel cell stack to avoid residual moisture freezing in winter.

[0003] In the prior art, the accumulated water in the gas-liquid separator of the hydrogen path is monitored by a liquid level sensor, but the range of liquid level sensing is limited. If the amount of water is too small, the liquid level sensor will not be able to detect it, and the drainage signal will be difficult to trigger, so that the water will remain in the water separator and cannot be discharged. At the same time, the liquid level sensor is also very easy to cause false alarms or fail to trigger when the vehicle is tilted, shaken, or the liquid splashes. In addition, the time for the drain valve to open and drain water is a fixed value, but the accumulated water in the water separator varies with the operating conditions of the stack, or when the vehicle tilts and causes too much water to accumulate in the stack, the set time may be difficult to achieve the requirement of draining the accumulated water. Therefore, when the fuel-electric system is tilted, the drainage control has the problem of being unable to effectively drain the water in the fuel cell completely, resulting in the stack being flooded or freezing during low-temperature cold start due to the inability to drain the water inside the fuel cell stack. The long-term flooding state will cause corrosion and damage to the materials of the stack, shortening the service life of the stack.

[0004] Therefore, a new technical solution is urgently needed to solve the above technical problems. Summary of the invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention, which will be further described in detail in the Detailed Description of the Invention. The Summary of the Invention does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the scope of protection of the claimed technical solution.

[0006] In a first aspect, the present invention provides a fuel cell drainage control method, wherein a tilt sensor is provided in the fuel cell system, and the method comprises:

[0007] Acquire angular velocity information in multiple directions detected by the tilt sensor, wherein the multiple directions include a forward direction of the vehicle, a lateral direction of the vehicle, and a vertical direction of the vehicle, the lateral direction of the vehicle is perpendicular to the forward direction of the vehicle and is located in the same horizontal plane as the forward direction of the vehicle, and the vertical direction of the vehicle is perpendicular to the forward direction and is located in the same vertical plane as the forward direction of the vehicle;

[0008] Performing data processing on the angular velocity information in multiple directions to obtain the inclination angle information in multiple directions;

[0009] Based on the comparison results of the inclination angle information in multiple directions and the preset angle threshold, the corresponding drainage strategy is determined.

[0010] Furthermore, the fuel cell system also includes a vehicle controller, an air supply system, a hydrogen supply system and an automatic suspension system, and determines a corresponding drainage strategy based on the comparison results of the inclination angle information in multiple directions with the preset angle threshold, including:

[0011] During the cold start phase and / or shutdown phase of the automobile, when the inclination angle in the first direction is less than or equal to the first preset angle threshold, or the inclination angle in the second direction is less than or equal to the second preset angle threshold, or the inclination angle in the second direction is greater than the second preset angle threshold and less than or equal to the third preset angle threshold, the vehicle controller controls the automatic suspension system to adjust the wheel height of the automobile so that the wheel height of the automobile is the same, wherein the first direction is the forward direction of the automobile, and the second direction is the lateral direction of the automobile;

[0012] When the inclination angle in the first direction is greater than a first preset angle threshold and less than or equal to a fourth preset angle threshold, determining the side deviation direction of the vehicle to adjust the wheel height of the corresponding side according to the side deviation direction;

[0013] After adjusting the heights of the wheels of the vehicle to the same height, the air supply system and the hydrogen supply system are controlled to perform purging and drainage in a horizontal mode.

[0014] Furthermore, based on the comparison results of the inclination angle information in multiple directions with the preset angle threshold, a corresponding drainage strategy is determined, including:

[0015] When the inclination angle in the first direction is greater than a fourth preset angle threshold or the inclination angle in the second direction is greater than a third preset angle threshold, determining the inclination direction of the vehicle, so as to raise the wheel on the corresponding side to a maximum height limit and lower the wheel on the other side to a minimum height limit according to the inclination direction;

[0016] After the vehicle is adjusted to a stable state, the air supply system and the hydrogen supply system are controlled to perform purging and drainage in a tilted mode.

[0017] Furthermore, the method further comprises:

[0018] Based on the liquid water accumulation rate, the produced water volume is calculated;

[0019] Determine whether to start the automatic drainage mode based on the relationship between the produced water volume and the volume threshold of the gas-liquid separator;

[0020] In the automatic drainage mode, the drainage frequency is determined based on the comparison results of the inclination angle information in multiple directions with the preset angle threshold.

[0021] Furthermore, the inclination sensor is horizontally mounted on a control circuit board of the fuel cell system.

[0022] Furthermore, before acquiring the angular velocity information in multiple directions detected by the tilt sensor, the method further includes:

[0023] Initialize the tilt sensor;

[0024] Configure the initialized tilt sensor.

[0025] Furthermore, the fuel cell system also includes a fuel cell stack, and the exhaust valve and the drain valve in the air supply system and the exhaust valve and the drain valve in the hydrogen supply system are all arranged below the fuel cell stack in the first direction and / or the second direction.

[0026] In the second aspect, a fuel cell drainage control device is also proposed, wherein a fuel cell system is provided with a tilt sensor, comprising:

[0027] an acquisition module, used to acquire angular velocity information in multiple directions detected by the tilt sensor, wherein the multiple directions include a forward direction of the vehicle, a lateral direction of the vehicle, and a vertical direction of the vehicle, the lateral direction of the vehicle is perpendicular to the forward direction of the vehicle and is located in the same horizontal plane as the forward direction of the vehicle, and the vertical direction of the vehicle is perpendicular to the forward direction and is located in the same vertical plane as the forward direction of the vehicle;

[0028] A data processing module is used to process the angular velocity information in multiple directions to obtain the inclination angle information in multiple directions;

[0029] The strategy determination module is used to determine the corresponding drainage strategy based on the comparison results of the inclination angle information in multiple directions and the preset angle threshold.

[0030] In a third aspect, an electronic device is also proposed, including a processor and a memory, wherein the memory stores computer program instructions, and the computer program instructions are used to execute the above fuel cell drainage control method when the processor is running.

[0031] In a fourth aspect, a storage medium is also proposed, on which program instructions are stored, and the program instructions are used to execute the fuel cell drainage control method as described above when running.

[0032] The present invention provides a fuel cell drainage control method and related equipment, which relate to the technical field of fuel cell stacks. The method comprises: obtaining angular velocity information in multiple directions detected by an inclination sensor, wherein the multiple directions include a forward direction of a vehicle, a lateral direction of the vehicle, and a vertical direction of the vehicle, the lateral direction of the vehicle is perpendicular to the forward direction of the vehicle and is located in the same horizontal plane as the forward direction of the vehicle, and the vertical direction of the vehicle is perpendicular to the forward direction and is located in the same vertical plane as the forward direction of the vehicle; performing data processing on the angular velocity information in multiple directions to obtain inclination angle information in multiple directions; and determining corresponding drainage strategies based on comparison results of the inclination angle information in multiple directions with preset angle thresholds.

[0033] This application can fully and accurately understand the tilt state of the car by acquiring and processing angular velocity information in multiple directions. Multi-directional monitoring can more promptly detect the impact of the car's tilt on the drainage of the fuel cell, improving the reliability and stability of the system. At the same time, the drainage strategy is determined based on the comparison results of the inclination angles in different directions with the preset angle thresholds, so that the system can adapt to different driving conditions and tilt conditions of the car. Under various complex road conditions, the effective drainage of the fuel cell system can be guaranteed, avoiding problems such as flooding of the stack or low-temperature freezing due to water accumulation, and improving the service life and performance of the fuel cell system.

[0034] The fuel cell drainage control method of the present invention, other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0036] In order to more clearly illustrate the embodiments of the present application 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, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0037] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present application. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0038] Figure 1 A schematic flow chart of a fuel cell drainage control method according to an embodiment of the present invention is shown;

[0039] Figure 2 Another schematic flow chart of a fuel cell drainage control method according to an embodiment of the present invention is shown;

[0040] Figure 3 Another schematic flow chart of a fuel cell drainage control method according to an embodiment of the present invention is shown;

[0041] Figure 4 A schematic block diagram of an electronic device according to an embodiment of the present invention is shown;

[0042] Figure 5 Another schematic flow chart of a fuel cell drainage control method according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0043] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0044] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0045] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0046] refer to Figure 1 In order to solve the above technical problems, according to the first aspect of the present application, a fuel cell drainage control method is proposed, wherein a tilt sensor is provided in the fuel cell system, and the method comprises:

[0047] Step S110: Acquire angular velocity information in multiple directions detected by the tilt sensor, wherein the multiple directions include a forward direction of the vehicle, a lateral direction of the vehicle, and a vertical direction of the vehicle, the lateral direction of the vehicle is perpendicular to the forward direction of the vehicle and is located in the same horizontal plane as the forward direction of the vehicle, and the vertical direction of the vehicle is perpendicular to the forward direction and is located in the same vertical plane as the forward direction of the vehicle;

[0048] It should be noted that the angular velocity information in multiple directions detected by the tilt sensor is first obtained. They include: the lateral direction of the car is perpendicular to the forward direction of the car and in the same horizontal plane, and the vertical direction of the car is perpendicular to the forward direction and in the same vertical plane. The tilt sensor can monitor the changes in the movement state of the car in different directions in real time, providing basic data for the subsequent determination of drainage strategies.

[0049] By obtaining the angular velocity information in the three different directions of the vehicle's forward direction, lateral direction, and vertical direction, the changes in the vehicle's motion state in space can be understood. The angular velocity in the forward direction reflects the dynamic changes of the vehicle along the driving direction, the angular velocity in the lateral direction reflects the left and right tilt or steering of the vehicle on the horizontal plane, and the angular velocity in the vertical direction can capture the vehicle's up and down bumps in the vertical plane. Multi-directional monitoring can more accurately reflect the various postures of the vehicle in actual operation, providing richer and more comprehensive basic data for the subsequent determination of drainage strategies.

[0050] Step S120: performing data processing on the angular velocity information in multiple directions to obtain the inclination angle information in multiple directions;

[0051] The angular velocity information in multiple directions is processed to calculate the tilt angle of each axis. Through data processing, the angular velocity information can be converted into intuitive tilt angle information to better judge the tilt state of the car.

[0052] For example, although the angular velocity information in multiple directions detected by the tilt sensor can reflect the rotation changes of the car in different directions, the angular velocity itself cannot directly indicate the degree of tilt of the car. Converting the angular velocity information into more intuitive tilt angle information can more accurately evaluate the impact of the car's tilt on the drainage of the fuel cell. By obtaining the tilt angle information, the degree of tilt of the car in various directions can be directly reflected, making the formulation of the drainage strategy more scientific and accurate.

[0053] For example, as the car travels, the inclination angle information will continue to change. The drainage system can monitor these changes in real time and dynamically adjust the drainage strategy based on the latest inclination angle information. For example, if the car suddenly encounters a bump during driving, causing a large change in the inclination angle, the drainage system can quickly adjust the opening degree of the drainage valve and the drainage flow rate to adapt to the new inclination state and ensure the normal operation of the fuel cell system.

[0054] For example, when a car tilts sideways, water in the fuel cell system will accumulate on one side, increasing the pressure of drainage on that side; while vertical bumps will cause water to slosh in the system, affecting the normal operation of the drainage valve. Therefore, obtaining multi-directional angular velocity information can provide an accurate basis for formulating targeted drainage strategies.

[0055] Step S130: Determine a corresponding drainage strategy based on the comparison result between the inclination angle information in multiple directions and the preset angle threshold.

[0056] The tilt angle information based on multiple directions is compared with the preset angle threshold. The preset angle threshold can be set according to the actual situation and drainage requirements, and different directions have different thresholds. By comparing the tilt angle information and the preset angle threshold, it can be determined whether the current tilt state of the car exceeds the range of normal drainage. If it exceeds the range, the corresponding drainage strategy needs to be adjusted to ensure the normal operation and drainage effect of the fuel cell system.

[0057] In the technical solution, the fuel cell system also includes a vehicle controller, an air supply system, a hydrogen supply system and an automatic suspension system. Based on the comparison results of the inclination angle information in multiple directions with the preset angle threshold, the corresponding drainage strategy is determined, including:

[0058] During the cold start phase and / or shutdown phase of the automobile, when the inclination angle in the first direction is less than or equal to the first preset angle threshold, or the inclination angle in the second direction is less than or equal to the second preset angle threshold, or the inclination angle in the second direction is greater than the second preset angle threshold and less than or equal to the third preset angle threshold, the vehicle controller controls the automatic suspension system to adjust the wheel height of the automobile so that the wheel height of the automobile is the same, wherein the first direction is the forward direction of the automobile, and the second direction is the lateral direction of the automobile;

[0059] refer to Figure 2 It should be noted that the first direction of the inclination angle is expressed in the X-axis direction, that is, the vehicle's forward direction, the fuel-electric system and the vehicle tilt left or right at an angle θ x_act ; The first preset angle threshold is represented by θ x_ref1 The second direction of the inclination angle is expressed in the Y-axis direction, that is, the lateral direction of the vehicle, the inclination angle θ of the fuel-electric system and the vehicle when going downhill y_act ; The second preset angle threshold is represented by θ y_ref1 , the third preset angle threshold is represented by θ y_ref2 , which is the corresponding angle between the car and the ground when the left and right front wheels of the automatic suspension system are raised to the highest position.

[0060] When the inclination angle in the first direction, that is, the inclination angle of the car in the forward direction is less than or equal to the first preset angle threshold, it means that the inclination degree of the car in the front and rear directions is small or within an acceptable range. The automatic suspension system is controlled by the vehicle controller to adjust the wheel height of the car to make the wheel height of the car the same.

[0061] When the inclination angle in the second direction, that is, the inclination angle in the lateral direction of the car is less than or equal to the second preset angle threshold, it means that the degree of inclination of the car in the lateral direction is small. The automatic suspension system is controlled by the vehicle controller to adjust the wheel height of the car to make the wheel height of the car the same.

[0062] When the inclination angle in the second direction is greater than the second preset angle threshold and less than or equal to the third preset angle threshold, it means that the car has a certain inclination in the lateral direction. The automatic suspension system is controlled by the vehicle controller to adjust the wheel height of the car to make the wheel height of the car the same.

[0063] For cars, the direction of travel will not affect the drainage function. The fuel-electric system will only be affected by the tilt angle in the forward direction and the lateral direction of the car. That is, when the fuel-electric system tilts to the left and right of the driver, the drainage strategy needs to be optimized. When the car is going downhill, the position of the drain valve and exhaust valve will be higher than the lowest point of the fuel cell stack, which will cause the water inside the stack to be unable to be effectively drained. When the car is going uphill, due to the layout of the drain valve and exhaust valve, no matter what the situation is, the drain valve and exhaust valve will be lower than the lowest point of the stack, so there is no abnormal drainage problem.

[0064] When the inclination angle in the first direction is greater than the first preset angle threshold and less than or equal to the fourth preset angle threshold, the side deviation direction of the vehicle is determined to adjust the wheel height of the corresponding side according to the side deviation direction; it should be noted that the fourth preset angle threshold represents the middle θ x_ref2 , is the corresponding angle between the car and the ground when the left front wheel and left rear wheel of the automatic suspension system are raised to the highest position.

[0065] When the inclination angle in the first direction is greater than the first preset angle threshold and less than or equal to the fourth preset angle threshold, it indicates that the car has a certain degree of inclination in the forward direction. When the car has a certain inclination in the forward direction and there is a side deviation, adjusting the wheel height on the corresponding side can help restore the stability of the car. By increasing or decreasing the wheel height on a specific side, the center of gravity distribution of the car can be changed to reduce the degree of inclination and side deviation. For example, if the car deviates to the left, appropriately increasing the height of the left wheel can move the center of gravity of the car to the right, thereby reducing the inclination and side deviation on the left side and restoring the car to a more stable state.

[0066] It should be noted that the purge exhaust system includes an air supply system, a hydrogen supply system, a fuel cell stack, a fuel cell controller FCCU, a fuel cell power control unit, a vehicle controller VCU, and a vehicle automatic suspension system. The air supply system includes an air filter, an air flow meter, an air compressor, an intercooler, an air inlet / purge pressure sensor, a large inlet shutoff valve, a relief valve, a back pressure valve, and a mixed discharge; the hydrogen supply system includes a hydrogen inlet valve, a hydrogen injector, a hydrogen return pump, a hydrogen inlet sensor, a gas-liquid separator, an exhaust valve, and a drain valve.

[0067] The main function of the PCU power control unit is to boost the voltage of the fuel cell stack and output it. It is generally controlled by a target current command. The PCU includes a boost DCDC module, a high-voltage power distribution PDU module, an EIS stack internal resistance detection module, a current sensor, and a voltage sensor.

[0068] The boost DCDC module is used to increase the voltage of the battery stack and stabilize the output power. The high-voltage distribution PDU module mainly supplies power to the high-voltage components of the fuel-electric system. The EIS is used to detect the internal resistance of the battery stack and the humidity of the battery stack to determine whether the membrane is dry or flooded. The current sensor and voltage sensor are used to detect the total current and total voltage of the battery stack output.

[0069] The working principle of the fuel cell drainage system is as follows:

[0070] When the fuel cell system is working normally, at the cathode, the air is compressed by the air compressor and then cooled by the intercooler, and then sent to the cathode of the stack from the cathode inlet pipe through the stack shut-off valve (open state). After the electrode reaction, the cathode exhaust gas flows from the cathode outlet pipe to the back pressure valve and finally enters the mixed exhaust and is discharged to the atmosphere. If the pressure exceeds the threshold, the discharge valve will open to discharge the air and reduce the air pressure.

[0071] At the anode, after opening the hydrogen inlet valve, the hydrogen coming out of the hydrogen storage bottle enters the anode inlet of the stack through the anode inlet pipe after the flow is adjusted by the hydrogen injector. The anode waste hydrogen comes out from the anode outlet pipe, and after being separated by gas and water in the gas-liquid water separator, the dry hydrogen is pressurized by the hydrogen return pump and merged with the new hydrogen. The mixed gas is sent back to the stack from the hydrogen inlet pipeline to participate in the reaction. There are hydrogen pressure sensors at the anode inlet and outlet positions, and air pressure sensors are also set at the cathode inlet and outlet positions.

[0072] The entire fuel system control unit FCCU is responsible for collecting data such as pressure, temperature, voltage and current of the fuel cell system and sending control signals to each subsystem unit of the fuel cell, so as to achieve the purpose of stable and reliable power generation of the fuel cell system according to the power demand of the whole vehicle. At the same time, the fuel system control unit FCCU has an internal integrated inclination sensor, which can collect the angular velocity of the six axes in real time, convert it into corresponding angle information, and transmit it to the FCCU through the SPI or 12C interface to confirm the inclination angle of the fuel cell system at this time.

[0073] When the fuel-electric system is started, the hydrogen and air paths of the fuel cell stack will be purged and drained to ensure that there is no residual moisture in the stack. A large amount of water will be generated during the normal power generation process of the system, and it also needs to be discharged in time through the drain valve. Purging and drainage are also required during the shutdown stage of the fuel-electric system. During the entire unloading and discharge process, the residual oxygen consumption process inside the stack will produce moisture, so it needs to be discharged in time, otherwise flooding will occur. Long-term shutdown in winter will cause ice, affecting the performance and life of the stack.

[0074] The vehicle controller VCU is responsible for dynamically adjusting the vehicle's driving state, sending control instructions to the vehicle's automatic suspension system, and improving the vehicle's balance performance by adjusting the height of the four wheels.

[0075] Since the inclination sensor cannot be guaranteed to be completely horizontal with the fuel-electric system and the entire vehicle when installed and has no angle, the inclination sensor must have an initial angle. The following is the angle definition of the inclination sensor in this embodiment.

[0076] The X-axis direction of the gyroscope is the pitch axis direction of the inclination sensor, which is used to reflect the angle when the vehicle is tilted to the left or right of the driver. Rotating to the left is a negative angle (i.e. an angle greater than 180 degrees), and rotating to the right is a positive angle;

[0077] The Y-axis direction of the gyroscope is the roll axis direction of the inclination sensor, which is used to reflect the angle of the vehicle when going uphill or downhill. When going uphill, it is a negative angle (i.e., an angle greater than 180 degrees), and when going downhill, it is a positive angle;

[0078] The Z-axis direction of the gyroscope is the pitch and yaw axis direction of the tilt sensor, which is used to reflect the angle when the vehicle turns left or right. Turning right is a negative angle (i.e. an angle greater than 180 degrees), and turning left is a positive angle.

[0079] Since the value read by the inclination sensor is the angular velocity ω, the data processing module needs to convert the angular velocity into an angle and calculate the inclination angle of each axis according to θ=ω*t;

[0080]

[0081] The following formula is obtained by using the discrete equation:

[0082]

[0083] Parameter definition: The initial angle of the X, Y, and Z axes is θ x0 ,θ y0 ,θ z0 ;

[0084] T0: initial time;

[0085] T: time of sampling;

[0086] θ act : Current actual angle;

[0087] θ0: initial angle;

[0088] ω: is the angular velocity read by the sensor;

[0089] △t: is the time interval of sampling data;

[0090] This application is based on the detection of the vehicle's tilt angle, and adjusts the wheel height through the vehicle's automatic suspension system to achieve vehicle balance, while optimizing the drainage strategy, so that the fuel cell stack will not be flooded or frozen during low-temperature cold start due to the inability to drain the water inside the fuel cell stack caused by the tilt of the fuel-electric system. At the same time, an effective drainage optimization strategy is provided in the three stages of the fuel cell system's startup, shutdown, and normal operation to ensure that the fuel-electric system does not suffer from flooding, which can not only ensure the reliable operation of the system, but also increase the service life of the fuel-electric system and reduce the maintenance cost of the system.

[0091] refer to Figure 3 In this technical solution, based on the comparison results of the inclination angle information in multiple directions with the preset angle threshold, the corresponding drainage strategy is determined, including:

[0092] When the inclination angle in the first direction is greater than a fourth preset angle threshold or the inclination angle in the second direction is greater than a third preset angle threshold, determining the inclination direction of the vehicle, so as to raise the wheel on the corresponding side to a maximum height limit and lower the wheel on the other side to a minimum height limit according to the inclination direction;

[0093] It should be noted that the tilt direction includes left and right tilt and front and back tilt (downhill). The corresponding side refers to the current side of the tilt, and the other side is the opposite side of the current side. When the car is in a downhill situation, the current side is represented as the front row and the other side is represented as the back row.

[0094] When the inclination angle in the first direction is greater than the fourth preset angle threshold, it indicates that the degree of inclination of the car in the forward direction is more serious. When the inclination angle in the second direction is greater than the third preset angle threshold, it indicates that the car has a large inclination in the lateral direction, that is, the car is severely tilted or is in an unstable parking state. By raising the corresponding side wheel to the maximum height limit, the tilt state of the car can be corrected by raising the wheel height of the tilted side, so that the center of gravity of the car moves to the other side, thereby increasing the stability of the tilted side. In addition, raising the corresponding side wheel to the maximum height limit can provide greater support force to a certain extent and reduce the inclination angle.

[0095] For example, when the car tilts to the left, raising the left wheel can move the car's center of gravity to the right, helping to restore balance. Lowering the height of the other wheel can further move the car's center of gravity in the opposite direction of the tilt, enhancing the adjustment effect. At the same time, lowering to the minimum height limit can increase the contact pressure between the other wheel and the ground, increase friction, and prevent the car from sliding.

[0096] For example, when the car tilts to the left, the height of the right wheel is lowered, and the left wheel is raised to correct the tilt.

[0097] For example, in a downhill situation, the front row is defined as the current side and the rear row is the other side. When going downhill, the center of gravity of the car will move forward, which can easily cause the front wheels to bear greater pressure, while the rear wheels are relatively light. By raising the front wheels to the maximum height limit and lowering the rear wheels to the minimum height limit, the center of gravity of the car can be adjusted, the grip of the rear wheels can be increased, and the stability and braking effect of the car when going downhill can be improved.

[0098] After the vehicle is adjusted to a stable state, the air supply system and the hydrogen supply system are controlled to perform purging and drainage in a tilted mode.

[0099] For example, the purge and drainage can be for the hydrogen path. First, the drain valve is opened to allow the water in the hydrogen path to be discharged smoothly. The hydrogen injector is turned on to inject hydrogen into the system to establish the hydrogen inlet pressure. The target pressure P is determined according to the design requirements and operating conditions of the system. H2_Obj , to ensure that hydrogen can enter the fuel cell stack at a suitable pressure. Open the exhaust valve for a duration of T H2 Finally, open the exhaust valve to discharge the air and impurities in the hydrogen path to improve the purity of the hydrogen. Turn on the hydrogen pump to transport hydrogen from the storage container to the fuel cell stack. The target speed R Hcp_Obj , the purge time reaches the threshold T end_H2 End the purge and close the drain valve and exhaust valve.

[0100] In a fuel cell system, there may be moisture in the hydrogen circuit, which may come from the hydrogen preparation process, storage environment, or reaction products during system operation. If the moisture is not discharged in time, it may cause flooding of the fuel cell stack, reduce the purity of hydrogen, affect the performance of the fuel cell stack, or even damage the fuel cell stack. By purging and draining, the moisture in the hydrogen circuit can be effectively removed. In addition, purging and draining can discharge impurity gases and moisture in the hydrogen circuit to improve the purity of hydrogen. High-purity hydrogen helps improve the performance and life of the fuel cell stack.

[0101] For example, the purge and drainage can be for the air path purge and drainage. First, the back pressure valve and the bypass valve are opened, and the counter T is started. Air Record the purge time. The back pressure valve is used to adjust the pressure of the air path to ensure that the air enters the stack at an appropriate pressure. The bypass valve can adjust the air flow rate under certain circumstances. The air compressor starts, the air inlet pressure is established, and the target pressure P Air_Obj After the air compressor is started, it provides compressed air to the air path to establish the air inlet pressure. According to the operation requirements of the fuel cell stack, the target pressure P Air_Obj Make sure that air can enter the fuel cell stack at a suitable pressure to participate in the reaction. Air Reaching the calibrated end threshold T end_Air1When the air path purge and drainage process reaches the predetermined time requirement, the process can be terminated. This end threshold is usually determined through experiments and calibration to ensure that the moisture and impurities in the air path are fully removed.

[0102] Air path purging and drainage can remove moisture and impurities in the air path, ensuring that the air entering the fuel cell stack is pure and dry to maintain the good performance and reliability of the stack, while avoiding stack failure and performance degradation caused by moisture or impurities.

[0103] It should be noted that purging and draining when the vehicle is in an unstable state will increase the instability of the vehicle and even lead to dangerous situations. Therefore, adjusting the vehicle to a stable state first can provide safety for subsequent purging and draining operations. A stable state is conducive to more effective purging and draining of the air supply system and the hydrogen supply system. If the vehicle is in a tilted or unstable state, it will affect the flow of gas and the drainage effect.

[0104] Using tilt mode for purge drainage can use gravity to make water flow more easily to a specific discharge port. By adjusting the posture of the car, the water can be concentrated where it needs to be discharged, thereby improving the efficiency and thoroughness of drainage.

[0105] like Figure 5 As shown, in this technical solution, the method also includes:

[0106] Based on the liquid water accumulation rate, the produced water volume is calculated;

[0107] It should be noted that the liquid water aggregation rate is expressed as K H2O , the volume of produced water is expressed as V H2O .

[0108] According to the relationship between the produced water volume and the volume threshold of the gas-liquid separator, determine whether to start the automatic drainage mode; adjust the produced water volume V H20 >Volume threshold of gas-liquid separator, when adjusting the water production volume V H20 >When the volume threshold of the gas-liquid separator is reached, the automatic drainage mode is turned on.

[0109] It should be noted that the control algorithm can ensure that drainage is started in time when the water production volume reaches the threshold, avoiding the problem of untimely drainage or excessive drainage due to inaccurate human judgment.

[0110] In the automatic drainage mode, the drainage frequency is determined based on the comparison results of the inclination angle information in multiple directions with the preset angle threshold.

[0111] Through the angle data acquisition module, the real-time tilt angles of the first direction and the second direction can be obtained, that is, the tilt angle θ of the first directionx_act and the inclination angle θ in the second direction y_act When the inclination angle of the first direction is θ x_act Greater than the preset angle threshold θ x_ref3 Or the inclination angle θ of the second direction y_act Greater than the preset angle threshold θ x_ref3 to determine the drainage frequency.

[0112] In this technical solution, the inclination sensor is horizontally mounted on a control circuit board of the fuel cell system.

[0113] It should be noted that horizontally attaching the inclination sensor to the control circuit board can make full use of the plane space of the circuit board without taking up additional space, making the layout of the entire system more compact. For example, attaching the inclination sensor to the circuit board can be fixed by welding or other reliable connection methods to ensure that the sensor will not loosen or shift during the operation of the system, thereby improving the accuracy and stability of the measurement.

[0114] In the technical solution, before acquiring the angular velocity information in multiple directions detected by the tilt sensor, the method further includes:

[0115] Step S210: Initializing the tilt sensor;

[0116] It should be noted that the initialization process can set the internal state of the tilt sensor to a known initial value, ensuring that the sensor can start up and work normally, and avoiding erroneous measurements or unstable outputs caused by uncertain initial states of the sensor.

[0117] Step S220: configuring the initialized tilt sensor.

[0118] Through configuration, the parameters of the inclination sensor can be adjusted according to specific application requirements, so that the sensor can adapt to different working environments and conditions.

[0119] It should be noted that initialization processing and configuration before obtaining the angular velocity information in multiple directions detected by the inclination sensor helps to ensure the accuracy, stability and reliability of the sensor, providing a reliable basis for subsequent data analysis and system control. At the same time, this also reflects the importance of reasonable management and optimization of sensors to improve the performance and safety of the entire fuel cell system.

[0120] In this technical solution, the fuel cell system also includes a fuel cell stack, and the exhaust valve and drain valve in the air supply system and the exhaust valve and drain valve in the hydrogen supply system are all arranged below the fuel cell stack in the first direction and / or the second direction.

[0121] Fuel cell stacks are used to convert the chemical energy of hydrogen and oxygen into electrical energy. By placing the exhaust valve and drain valve under the stack, the exhaust gas and accumulated water in the air supply system and hydrogen supply system can be discharged more smoothly by gravity, which can keep the system clean and prevent the accumulation of gas and liquid from having a negative impact on system performance.

[0122] In the second aspect, a fuel cell drainage control device is also proposed, wherein a fuel cell system is provided with a tilt sensor, comprising:

[0123] an acquisition module, used to acquire angular velocity information in multiple directions detected by the tilt sensor, wherein the multiple directions include a forward direction of the vehicle, a lateral direction of the vehicle, and a vertical direction of the vehicle, the lateral direction of the vehicle is perpendicular to the forward direction of the vehicle and is located in the same horizontal plane as the forward direction of the vehicle, and the vertical direction of the vehicle is perpendicular to the forward direction and is located in the same vertical plane as the forward direction of the vehicle;

[0124] A data processing module is used to process the angular velocity information in multiple directions to obtain the inclination angle information in multiple directions;

[0125] The strategy determination module is used to determine the corresponding drainage strategy based on the comparison results of the inclination angle information in multiple directions and the preset angle threshold.

[0126] According to a third aspect of the present invention, an electronic device is also provided. Figure 4 FIG. 4 shows a schematic block diagram of an electronic device 400 according to an embodiment of the present invention. Figure 4 As shown, the electronic device 400 may include a processor 410 and a memory 420. The memory 420 stores computer program instructions, which are used by the processor 410 to execute the fuel cell drainage control method as described above when the processor 410 is running.

[0127] According to a fourth aspect of the present invention, a storage medium is also provided, on which program instructions are stored, and the program instructions are used to execute the fuel cell drainage control method as described above when running. The storage medium may include, for example, a storage component of a tablet computer, a hard disk of a computer, a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a portable compact disk read-only memory (CD-ROM), a USB memory, or any combination of the above storage media. The computer-readable storage medium may be any combination of one or more computer-readable storage media.

[0128] A person skilled in the art may understand the specific details and beneficial effects of the fuel cell drainage control device, the electronic device and the storage medium by reading the above description of the fuel cell drainage control method, which will not be described here for the sake of brevity.

[0129] In the several embodiments provided in the present application, it should be understood that the disclosed devices and / or equipment can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0130] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0131] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0132] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0133] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fuel cell drainage control method, characterized in that: A tilt sensor is provided in the fuel cell system, and the method comprises: Acquire angular velocity information in multiple directions detected by the tilt sensor, wherein the multiple directions include a forward direction of the vehicle, a lateral direction of the vehicle, and a vertical direction of the vehicle, the lateral direction of the vehicle is perpendicular to the forward direction of the vehicle and is located in the same horizontal plane as the forward direction of the vehicle, and the vertical direction of the vehicle is perpendicular to the forward direction and is located in the same vertical plane as the forward direction of the vehicle; Performing data processing on the angular velocity information in the multiple directions to obtain the inclination angle information in the multiple directions; Based on the comparison results of the inclination angle information in the multiple directions and the preset angle threshold, a corresponding drainage strategy is determined.

2. The fuel cell drainage control method according to claim 1, characterized in that: The fuel cell system further includes a vehicle controller, an air supply system, a hydrogen supply system and an automatic suspension system. The corresponding drainage strategy is determined based on the comparison result of the inclination angle information in the multiple directions with the preset angle threshold, including: During the cold start phase and / or shutdown phase of the automobile, when the inclination angle in the first direction is less than or equal to the first preset angle threshold, or the inclination angle in the second direction is less than or equal to the second preset angle threshold, or the inclination angle in the second direction is greater than the second preset angle threshold and less than or equal to the third preset angle threshold, the vehicle controller controls the automatic suspension system to adjust the wheel height of the automobile so that the wheel heights of the automobile are the same, wherein the first direction is the forward direction of the automobile, and the second direction is the lateral direction of the automobile; When the inclination angle of the first direction is greater than the first preset angle threshold and less than or equal to a fourth preset angle threshold, determining the side deviation direction of the vehicle to adjust the wheel height of the corresponding side according to the side deviation direction; After adjusting the heights of the wheels of the vehicle to the same height, the air supply system and the hydrogen supply system are controlled to perform purging and drainage in a horizontal mode.

3. The fuel cell drainage control method according to claim 2, characterized in that: The determining of a corresponding drainage strategy based on a comparison result between the inclination angle information in the multiple directions and a preset angle threshold comprises: When the inclination angle in the first direction is greater than the fourth preset angle threshold or the inclination angle in the second direction is greater than the third preset angle threshold, determining the inclination direction of the vehicle, so as to raise the wheel on the corresponding side to a maximum height limit and lower the wheel on the other side to a minimum height limit according to the inclination direction; After the vehicle is adjusted to a stable state, the air supply system and the hydrogen supply system are controlled to perform purging and drainage in a tilt mode.

4. The fuel cell water drainage control method according to claim 1, characterized in that: The method further comprises: Based on the liquid water accumulation rate, the produced water volume is calculated; Determining whether to start the automatic drainage mode according to the relationship between the produced water volume and the volume threshold of the gas-liquid separator; In the automatic drainage mode, the drainage frequency is determined based on the comparison result of the inclination angle information in the multiple directions with the preset angle threshold.

5. The fuel cell water drainage control method according to claim 1, characterized in that: The inclination sensor is horizontally mounted on the control circuit board of the fuel cell system.

6. The fuel cell water drainage control method according to claim 1, characterized in that: Before acquiring the angular velocity information in multiple directions detected by the tilt sensor, the method further includes: Initializing the tilt sensor; Configure the initialized tilt sensor.

7. The fuel cell water discharge control method according to claim 2, characterized in that: The fuel cell system also includes a fuel cell stack, and the exhaust valve and the drain valve in the air supply system and the exhaust valve and the drain valve in the hydrogen supply system are all arranged below the fuel cell stack in the first direction and / or the second direction.

8. A fuel cell drainage control device, characterized in that: The fuel cell system is provided with an inclination sensor, including: an acquisition module, used for acquiring angular velocity information in multiple directions detected by the tilt sensor, wherein the multiple directions include a forward direction of the vehicle, a lateral direction of the vehicle, and a vertical direction of the vehicle, the lateral direction of the vehicle is perpendicular to the forward direction of the vehicle and is located in the same horizontal plane as the forward direction of the vehicle, and the vertical direction of the vehicle is perpendicular to the forward direction and is located in the same vertical plane as the forward direction of the vehicle; A data processing module, used for performing data processing on the angular velocity information in the multiple directions to obtain the inclination angle information in the multiple directions; The strategy determination module is used to determine the corresponding drainage strategy based on the comparison result of the inclination angle information in the multiple directions and the preset angle threshold.

9. An electronic device, characterized in that: It comprises a processor and a memory, wherein the memory stores computer program instructions, and the computer program instructions are used to execute the fuel cell drainage control method as claimed in any one of claims 1 to 7 when the processor is running.

10. A storage medium having program instructions stored thereon, wherein the program instructions are used to execute the fuel cell drainage control method according to any one of claims 1 to 7 when running.

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