Fuel cell monitoring method and monitoring device

Abstract

The application discloses a kind of fuel cell monitoring method and monitoring equipment, belong to fuel cell technical field, flow channel is divided into multiple subareas, when the actual output voltage of fuel cell is less than preset voltage, determine that fuel cell exists fault, then the actual temperature and actual pressure of each subarea are acquired, by comparing actual temperature and preset temperature, comparing actual pressure and preset pressure, find out the subarea that exists fault and mark as target subarea, then the actual image of target subarea is acquired, the fault type of target subarea is determined after actual image is analyzed, so as to accurately find out the fault position and fault type of fuel cell, prevent the situation of fault misjudgment or fault misjudgment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fuel cells, in particular to a fuel cell monitoring method. BACKGROUND

[0002] In a proton exchange membrane fuel cell, the stack is the main place of power generation, and the hydrogen and air media inside the stack are usually unevenly distributed. In particular, the current density at the inlet end is greater than that at the outlet end, and different current distributions are generated by different flow channel forms and different catalyst gradient designs. Moreover, when the inlet pressure, temperature, humidity, flow rate, etc. of hydrogen or air are not reasonably controlled, different fault types may occur inside the stack. Therefore, the prior art sets the stack in a visual form, and analyzes the fault type of the fuel cell by observing the media flow in the flow channel of the electrode inside the fuel cell. However, for a fuel cell with a large size, if the fault type is analyzed by observing the media flow in the flow channel, since a large area needs to be observed, the fault may be missed or misjudged. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a fuel cell monitoring method and a monitoring device, which compares the actual temperature with the preset temperature and compares the actual pressure with the preset pressure, finds the faulty partition and marks it as the target partition, and then acquires the actual image of the target partition, analyzes the actual image and determines the fault type of the target partition, so as to accurately find the fault position and fault type of the fuel cell and prevent the fault from being missed or misjudged.

[0004] According to the fuel cell monitoring method of the first aspect of the embodiment of the present application, for a fuel cell having a polar plate with a flow channel for fuel flow, the monitoring method comprises:

[0005] dividing the flow channel into a plurality of partitions, and controlling the fuel cell to provide a preset voltage to a load;

[0006] acquiring an actual output voltage of the fuel cell, and when the actual output voltage is less than the preset voltage, acquiring an actual temperature and an actual pressure of each partition;

[0007] determining whether the actual temperature is equal to a preset temperature and whether the actual pressure is equal to a preset pressure, wherein the preset temperature and the preset pressure are acquired from preset data of the partition, the preset temperature is used to represent the temperature when the partition is normally operated, and the preset pressure is used to represent the pressure when the partition is normally operated;

[0008] When the actual temperature is not equal to the preset temperature or the actual pressure is not equal to the preset pressure, mark the partition as a target partition;

[0009] Obtain an actual image of the target partition, and determine, according to the actual image, that the target partition has a membrane dry failure, a water flooding failure, a water blockage failure, an impurity blockage failure, an insufficient gas failure, or a damage failure.

[0010] The fuel cell monitoring method according to the embodiments of the present application has at least the following beneficial effects: the flow channel is divided into multiple partitions, when the actual output voltage of the fuel cell is less than the preset voltage, it is determined that the fuel cell has a failure, then the actual temperature and the actual pressure of each partition are obtained, by comparing the actual temperature with the preset temperature and comparing the actual pressure with the preset pressure, the partition having the failure is found out and marked as a target partition, then the actual image of the target partition is obtained, the actual image is analyzed to determine the failure type of the target partition, so that the failure position and the failure type of the fuel cell can be accurately found out, and the situation of missing judgment or misjudgment of the failure can be prevented.

[0011] According to some embodiments of the present application, the monitoring method further comprises:

[0012] Any two adjacent partitions in the front and back are divided into a first partition and a second partition according to the direction of the fuel flow;

[0013] Obtain a first current of the first partition and a second current of the second partition, and compare the first current with the second current;

[0014] When the second current is greater than the first current, mark the first partition as the target partition.

[0015] According to some embodiments of the present application, the determining, according to the actual image, that the target partition has a membrane dry failure, a water flooding failure, a water blockage failure, an impurity blockage failure, an insufficient gas failure, or a damage failure comprises:

[0016] Compare the actual temperature with the preset temperature, and determine, according to the actual image, whether the target partition is dry or wet;

[0017] When the actual temperature is greater than the preset temperature and the target partition is dry, it is determined that the target partition has the membrane dry failure;

[0018] When the actual temperature is less than the preset temperature and the target partition is wet, it is determined that the target partition has the water flooding failure.

[0019] According to some embodiments of the present application, the determining, according to the actual image, whether the target partition has a membrane dry failure, a water flooding failure, a water blockage failure, a foreign matter blockage failure, an insufficient gas failure, or a damage failure, comprises:

[0020] determining whether the actual pressure is greater than the preset pressure;

[0021] when it is determined that the actual pressure is greater than the preset pressure, determining, according to the actual image, whether the target partition is blocked;

[0022] when it is determined that the target partition is blocked, determining whether the blockage of the target partition is liquid or solid;

[0023] when it is determined that the blockage is liquid, determining that the target partition has the water blockage failure;

[0024] when it is determined that the blockage is solid, determining that the target partition has the foreign matter blockage failure.

[0025] According to some embodiments of the present application, the determining, according to the actual image, whether the target partition has a membrane dry failure, a water flooding failure, a water blockage failure, a foreign matter blockage failure, an insufficient gas failure, or a damage failure, further comprises:

[0026] determining whether the actual pressure is less than the preset pressure;

[0027] when it is determined that the actual pressure is less than the preset pressure, determining, according to the actual image, whether the target partition has a damage;

[0028] when it is determined that the target partition does not have a damage, determining that the target partition has the insufficient gas failure;

[0029] when it is determined that the target partition has a damage, determining that the target partition has the damage failure.

[0030] According to some embodiments of the present application, the monitoring method further comprises:

[0031] obtaining a failure position of the polar plate according to the position of the target partition, and obtaining a failure type of the polar plate according to the failure form of the target partition;

[0032] counting the failure position and the failure type of a plurality of the polar plates, obtaining high-risk position information of the polar plate according to a plurality of the failure positions, and obtaining high-risk failure type information of the polar plate according to a plurality of the failure types.

[0033] According to some embodiments of the present application, the monitoring method further comprises:

[0034] When the actual output voltage is equal to the preset voltage, the temperature record of each of the sub-zones is obtained as the preset temperature, and the pressure record of each of the sub-zones is obtained as the preset pressure.

[0035] The fuel cell monitoring device according to the second aspect of the embodiments of the present application is used to implement the fuel cell monitoring method as described above.

[0036] The fuel cell monitoring device according to the embodiments of the present application has at least the following beneficial effects: using the fuel cell monitoring device, the flow channel is divided into a plurality of sub-zones, when the actual output voltage of the fuel cell is less than the preset voltage, it is determined that the fuel cell has a fault, then the actual temperature and the actual pressure of each sub-zone are obtained, by comparing the actual temperature with the preset temperature and comparing the actual pressure with the preset pressure, the sub-zone having the fault is found out and marked as a target sub-zone, then the actual image of the target sub-zone is obtained, the actual image is analyzed to determine the fault type of the target sub-zone, so that the fault position and the fault type of the fuel cell can be accurately found out, and the situation of missing judgment or misjudgment of the fault can be prevented.

[0037] According to some embodiments of the present application, the monitoring device comprises:

[0038] A monitoring plate is arranged on the polar plate, the monitoring plate is provided with a plurality of monitoring areas, each of the monitoring areas is provided with a temperature sensor and a pressure sensor, the temperature sensor is used to obtain the actual temperature, the pressure sensor is used to obtain the actual pressure, the monitoring plate is provided with a transparent window, and the front direction of the monitoring plate relative to the polar plate is set as the front direction;

[0039] A camera is arranged in front of the monitoring plate, and the camera is used to shoot the actual image through the transparent window.

[0040] According to some embodiments of the present application, the monitoring device further comprises:

[0041] A sealing ring is arranged on the back side of the monitoring plate, and the sealing ring surrounds the periphery of the polar plate;

[0042] A front pressing plate and a back pressing plate are arranged on the front side and the back side of the polar plate respectively, and the front pressing plate and the back pressing plate are connected to press the sealing ring tightly between the monitoring plate and the polar plate.

[0043] Other features and advantages of the present application will be described in the following description, and some will become apparent from the description, or will be understood through implementation of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 FIG. 1 is a flow chart of a fuel cell monitoring method according to an embodiment of the present application;

[0045] Figure 2 Fig. 4 is a flowchart illustrating a process for determining whether a target zone has a membrane dry-out failure or a water flooding failure according to an embodiment of the present application;

[0046] Figure 3 Fig. 5 is a flowchart illustrating a process for determining whether a target zone has a water blockage failure or a foreign matter blockage failure according to an embodiment of the present application;

[0047] Figure 4 Fig. 6 is a flowchart illustrating a process for determining whether a target zone has an under-gas failure or a damage failure according to an embodiment of the present application;

[0048] Figure 5 Fig. 7 is a flowchart illustrating a process for determining high-risk position information and high-risk failure type information of a polar plate according to an embodiment of the present application;

[0049] Figure 6 Fig. 8 is a connection diagram of a fuel cell monitoring apparatus according to an embodiment of the present application;

[0050] Figure 7 Fig. 9 is a structural diagram of a fuel cell monitoring apparatus according to an embodiment of the present application.

[0051] Fig. 10 is a structural diagram of a fuel cell monitoring apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0052] Embodiments of the present application are described in detail below with reference to the attached drawings. The embodiments of the present application described below are examples for explaining the present application and should not be construed as limiting the present application.

[0053] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms front, back, up, down, axial, circumferential, and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0054] In the description of the present application, the meaning of multiple is more than two, greater than, less than, more than, etc. is understood as not including the number, above, below, within, etc. is understood as including the number. If it is described that the first, the second is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the sequence of indicated technical features.

[0055] In the description of the present application, it should be noted that the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0056] The technical solutions of the present application will be described below in conjunction with the accompanying drawings. Obviously, the following described embodiments are part of the embodiments of the present application, not all embodiments.

[0057] In the related art, in a proton exchange membrane fuel cell, the stack is the main place of power generation, and the distribution of hydrogen and air media inside the stack is usually uneven, especially the current density at the inlet end is greater than that at the outlet end, and different flow channel forms and different catalyst gradient designs will produce different current distributions. Moreover, when the pressure, temperature, humidity, flow rate, etc. of the hydrogen (or air) inlet are not reasonably controlled, the electrodes inside the stack may appear waterlogging or drying, however, the current fault diagnosis method is relatively single, which generally judges by the polarization performance of the electrode, such as the lower voltage of a single cell and the trend of the voltage change of a single cell to judge that an unreasonable power generation occurs in a certain electrode, but it is still unable to determine whether different areas of the electrode exist uneven distribution, impurity blockage, local drying or waterlogging, etc.

[0058] Based on this, the embodiments of the present application provide a fuel cell monitoring method, which divides the flow channel into multiple partitions, determines that the fuel cell has a fault when the actual output voltage of the fuel cell is less than a preset voltage, then acquires the actual temperature and actual pressure of each partition, finds out the partition with a fault and marks it as a target partition by comparing the actual temperature with a preset temperature and comparing the actual pressure with a preset pressure, then acquires the actual image of the target partition, analyzes the actual image to determine the fault form of the target partition, so as to accurately find out the fault position and fault type of the fuel cell, and prevent the situation of missed judgment or mistaken judgment of faults.

[0059] Reference Figures 1 to 5 The fuel cell monitoring method according to the embodiments of the present application is described below, which is used for a fuel cell 10, and the fuel cell has a polar plate 100, and the polar plate 100 has a flow channel 110 for fuel flow. The fuel cell monitoring method is described below with specific examples.

[0060] Referring to Figure 1 The fuel cell monitoring method of the embodiment of the present application comprises the following steps.

[0061] In step S100, the flow channel 110 is divided into multiple sub-zones, and the fuel cell 10 is controlled to provide a preset voltage to the load 20.

[0062] The flow channel 110 is divided into multiple sub-zones, so that the temperature and pressure of each sub-zone can be measured separately, and the temperature and pressure of each sub-zone can be obtained, so that the operation of each sub-zone can be determined based on the temperature and pressure.

[0063] The fuel cell 10 supplies power to the load 20, so that the fuel cell 10 operates normally, and the load 20 operates at a preset voltage, i.e. the output voltage of the fuel cell 10 is equal to the preset voltage.

[0064] In step S200, the actual output voltage of the fuel cell 10 is obtained, and when the actual output voltage is less than the preset voltage, the actual temperature and the actual pressure of each sub-zone are obtained.

[0065] The actual output voltage can be obtained by measuring the output voltage of the fuel cell 10, and when the fuel cell 10 operates normally, the actual output voltage is equal to the preset voltage. Therefore, when the fuel cell 10 fails, the ability of the fuel cell 10 to generate electricity decreases, and the actual output voltage decreases, resulting in an actual output voltage lower than the preset voltage.

[0066] When the actual output voltage is lower than the preset voltage, it can be determined that the fuel cell 10 has failed, and the corresponding sensors are started to obtain the actual temperature and the actual pressure of each sub-zone, thereby improving the measurement efficiency and obtaining the parameters required for determining whether each sub-zone has failed in a timely manner.

[0067] In step S300, it is determined whether the actual temperature is equal to the preset temperature and whether the actual pressure is equal to the preset pressure, and the preset temperature and the preset pressure are obtained from the preset data of the sub-zone. The preset temperature is used to represent the temperature when the sub-zone operates normally, and the preset pressure is used to represent the pressure when the sub-zone operates normally.

[0068] When the fuel cell 10 operates normally, the preset temperature and the preset pressure of each sub-zone are determined based on the condition of each sub-zone, and the preset temperature and the preset pressure can be determined by measuring the temperature and the pressure of each sub-zone when it operates normally. Therefore, when the temperature and the pressure of each sub-zone are measured subsequently, the actual temperature of the sub-zone is generally equal to the preset temperature, and the actual pressure of the sub-zone is generally equal to the preset pressure when the sub-zone operates normally.

[0069] Since the positions of the partitions are different, the running parameters under normal operation are different, and other factors, the preset temperature and the preset pressure of different partitions are different, so the preset temperature and the preset pressure of each partition need to be set separately. For example, since the multiple partitions are arranged in sequence along the fuel flow direction of the flow channel 110, there are more chemical reactions in the partition close to the fuel entering end of the flow channel 110, and there are fewer chemical reactions in the partition away from the fuel entering end of the flow channel 110 because there is less fuel, so the preset temperature of the partition close to the fuel entering end of the flow channel 110 is greater than the preset temperature of the partition away from the fuel entering end of the flow channel 110.

[0070] When judging whether the partition has a fault, the actual temperature and the preset temperature are compared, and the actual pressure and the preset pressure are compared.

[0071] Step S400, when the actual temperature is not equal to the preset temperature or the actual pressure is not equal to the preset pressure, mark the partition as a target partition.

[0072] The actual temperature is greater than or less than the preset temperature, or the actual pressure is greater than or less than the preset pressure, which can prove that the operation of the partition has a fault, so the partition with a fault is marked as a target partition, and the specific fault form of the target partition can be verified through subsequent steps.

[0073] Step S500, acquire the actual image of the target partition, and determine that the target partition has a membrane dry fault, a water flooding fault, a water plugging fault, an impurity plugging fault, an insufficient gas fault, or a damage fault according to the actual image.

[0074] After determining the target partition and knowing the position of the target partition, then the actual image is captured by the camera 300, and the actual image is analyzed to analyze the specific fault form.

[0075] Since the target partition includes a part of the area of the flow channel 110, the analyst determines whether there is an anomaly in the part of the area of the flow channel 110 in the target partition by observing the actual image, and determines the fault form of the target partition from the form of the anomaly.

[0076] Alternatively, the analyst determines the fault form of the target partition from the flow of the fuel in the target partition by observing the flow of the fuel in the target partition in the actual image.

[0077] The fault forms that can be observed and determined through the actual image generally include a membrane dry fault, a water flooding fault, a water plugging fault, an impurity plugging fault, an insufficient gas fault, and a damage fault.

[0078] Of course, there is also a normal running partition misjudgment into the target partition, in the actual image of the partition is obtained, can observe the actual image, if the actual image is found no partition exists abnormal, can be considered that this partition is misjudged into the target partition, and then avoid fault misjudgment.

[0079] The flow channel 110 is divided into multiple partitions, when the actual output voltage is lower than the preset voltage, it is determined that the fuel cell 10 has a fault, then the actual pressure and actual temperature of each partition are obtained, by comparing the actual temperature and the preset temperature, and comparing the actual pressure and the preset pressure, the partition with the fault is found out and marked as the target partition, then the actual image is obtained, the actual image is analyzed and the fault type of the target partition is determined, so that the fault position and fault type of the fuel cell 10 can be accurately found out, and the fault omission or fault misjudgment can be prevented.

[0080] In some embodiments, referring to Figure 1 The monitoring method further includes the following steps.

[0081] Step S600, any two adjacent partitions in the direction of fuel flow are divided into a first partition and a second partition.

[0082] The fuel flow in the flow channel 110 passes through multiple partitions, any two sequentially adjacent partitions are set as a first partition and a second partition, that is, the fuel first flows through the first partition and then flows through the second partition, that is, the fuel first passes through the first partition for chemical reaction and then the remaining fuel passes through the second partition for chemical reaction, the fuel flowing into the second partition is generally less than the fuel flowing into the first partition.

[0083] Step S700, the first current of the first partition and the second current of the second partition are obtained, and the first current and the second current are compared.

[0084] Since the fuel first passes through the first partition for chemical reaction and then the remaining fuel passes through the second partition for chemical reaction, the fuel flowing into the second partition is generally less than the fuel flowing into the first partition, so the amount of fuel participating in chemical reaction in the first partition is greater than the amount of fuel participating in chemical reaction in the second partition. Based on this, under the condition that multiple partitions are normal, the first current generated by the first partition is greater than the second current generated by the second partition, that is, the current generated by multiple partitions gradually decreases with the flow direction of the fuel.

[0085] Step S800, when the second current is greater than the first current, the first partition is marked as the target partition.

[0086] When the second current generated by the second subregion is greater than the first current generated by the first subregion, it is proved that the chemical reaction of the fuel in the first subregion is blocked, and it can be determined that the first subregion has a fault, and then the first subregion is marked as a target subregion for subsequent analysis of the fault form of the first subregion.

[0087] The two methods for determining whether the subregion has a fault help to improve the fault detection rate of the subregion and prevent the situation of missed judgment or wrong judgment of the subregion fault.

[0088] In some embodiments, as shown in Figure 2 , step S500 includes the following steps.

[0089] Step S510, comparing the actual temperature with the preset temperature, and determining whether the target subregion is dry or wet according to the actual image.

[0090] After determining that the actual temperature of the target subregion is different from the preset temperature, the actual temperature and the preset temperature are compared, and then it is observed from the actual image that part of the flow channel 110 of the target subregion presents a dry form or a wet form.

[0091] Step S511, when the actual temperature is greater than the preset temperature and the target subregion is dry, it is determined that the target subregion has a film dry fault.

[0092] In the case that the actual pressure is equal to the preset pressure, when the actual temperature is higher than the preset temperature, it is proved that the heat generation of the target subregion is large, causing the temperature of the target subregion to abnormally rise.

[0093] And through the actual image, it can be known that part of the flow channel 110 of the target subregion presents a dry form, so it can be judged that the water content of the target subregion is insufficient, and then the fault form of the target subregion is determined as a film dry fault.

[0094] Step S512, when the actual temperature is less than the preset temperature and the target subregion is wet, it is determined that the target subregion has a water flooding fault.

[0095] In the case that the actual pressure is equal to the preset pressure, when the actual temperature is lower than the preset temperature, it is proved that the chemical reaction of the target subregion is slow, causing the temperature of the target subregion to be low.

[0096] And through the actual image, it can be known that part of the flow channel 110 of the target subregion presents a wet form, so it can be judged that the water content of the target subregion is too much, and then the fault form of the target subregion is determined as a water flooding fault.

[0097] In some embodiments, as shown in Figure 3 , step S500 further includes the following steps.

[0098] Step S520, determining whether the actual pressure is greater than the preset pressure.

[0099] In the case that the actual temperature of the target partition is equal to the preset temperature, when the actual pressure is higher than the preset pressure, it is proved that the pressure in the target partition is too high, and it is proved that there may be a blockage.

[0100] In step S521, when it is determined that the actual pressure is greater than the preset pressure, it is determined whether the target partition is blocked according to the actual image.

[0101] In the case that the actual pressure of the target partition is higher than the preset pressure, it can be known from the actual image that part of the flow channel 110 of the target partition is blocked.

[0102] In step S522, when it is determined that the target partition is blocked, it is determined whether the blockage of the target partition is liquid or solid.

[0103] In the case that part of the flow channel 110 of the target partition is blocked, the shape of the blockage in the actual image can be observed, and the blockage is generally liquid or solid.

[0104] In step S523, when it is determined that the blockage is liquid, it is determined that the target partition has a water blockage fault.

[0105] When the blockage in the actual image is liquid, it can be observed that a large amount of liquid blocks the flow channel 110, and fuel cannot be discharged. It can be determined that the fault form of the target partition is a water blockage fault.

[0106] In step S524, when it is determined that the blockage is solid, it is determined that the target partition has a foreign matter blockage fault.

[0107] When the blockage in the actual image is solid, it can be observed that solid foreign matter blocks the flow channel 110, and fuel cannot be discharged. It can be determined that the fault form of the target partition is a foreign matter blockage fault.

[0108] In some embodiments, referring to FIG. 5, step S500 further includes the following steps. Figure 4

[0109] In step S530, it is determined whether the actual pressure is less than the preset pressure.

[0110] In the case that the actual temperature of the target partition is equal to the preset temperature, when the actual pressure is lower than the preset pressure, it is proved that the pressure in the target partition is too low, and it is proved that there may be a pressure leak.

[0111] In step S531, when it is determined that the actual pressure is less than the preset pressure, it is determined whether the target partition is damaged according to the actual image.

[0112] In the case that the actual pressure of the target partition is lower than the preset pressure, it can be known from the actual image that part of the flow channel 110 of the target partition is damaged. ​

[0113] Step S532, when determining that the target partition does not have a breakage, determining that the target partition has an under-gas failure.

[0114] When determining that the partial flow channel 110 does not have a breakage, it is proved that the insufficient amount of fuel entering the flow channel 110 causes the pressure to be too low, and thus the failure form can be determined as an under-gas failure.

[0115] Step S533, when determining that the target partition has a breakage, determining that the target partition has a breakage failure.

[0116] When observing that the partial flow channel 110 has a breakage from the actual image, it is proved that the fuel entering the target partition leaks from the breakage position, and further causes the pressure to be too low, and thus the failure form is determined as a breakage failure.

[0117] In some embodiments, referring to Figure 5 as shown, the monitoring method further comprises the following steps.

[0118] Step S900, obtaining a failure position of the polar plate according to the position of the target partition, and obtaining a failure type of the polar plate according to the failure form of the target partition.

[0119] After determining the failure form of the target partition, the position of the polar plate 100 where the failure occurs can be determined as the failure position according to the position of the target partition in the polar plate 100, and then the failure type of the polar plate 100 is recorded according to the failure form.

[0120] Step S1000, counting the failure positions and failure types of a plurality of polar plates, obtaining high-risk position information of the polar plate according to a plurality of failure positions, and obtaining high-risk failure type information of the polar plate according to a plurality of failure types.

[0121] The failure positions and failure types are counted, and then the failure position where the number of occurrences of the type of polar plate 100 is more is sorted out as the high-risk position information, and the failure type where the number of occurrences of the type of polar plate 100 is more is sorted out as the high-risk failure type information, to help the designer improve the design scheme of the flow channel 110 of the type of polar plate 100.

[0122] In some embodiments, the monitoring method further comprises the following steps.

[0123] Step S90, when the actual output voltage is equal to the preset voltage, obtaining the temperature record of the partition as the preset temperature, and obtaining the pressure record of the partition as the preset pressure.

[0124] When the actual output voltage and the preset voltage are the same, it is proved that the partition is running normally, the temperature record measured by the partition running normally is recorded as the preset temperature, and the pressure record measured by the partition running normally is recorded as the preset pressure, so as to facilitate the subsequent call of the preset temperature and the preset pressure when monitoring the failure of the partition.

[0125] Reference Figure 6 With Figure 7 A fuel cell monitoring device according to an embodiment of the present application is described below with reference to the accompanying drawings.

[0126] The fuel cell monitoring device is used to implement the fuel cell monitoring method as described above.

[0127] The fuel cell 10 is electrically connected to the load 20, the fuel output pipe of the fuel cell test bench 30 is connected to the fuel inlet end of the fuel cell 10, the backflow pipe of the fuel cell test bench 30 is connected to the fuel outlet end of the fuel cell 10, the fuel cell test bench 30 inputs the fuel into the flow channel 110 of the polar plate 100 of the fuel cell 10 through the fuel inlet end, and the gas or liquid after the fuel reacts in the flow channel 110 is transported to the fuel cell test bench 30 through the fuel outlet end and the backflow pipe, and the fuel cell test bench 30 maintains the pressure inside the fuel cell 10 by transporting the fuel and discharging the gas or liquid after the reaction.

[0128] The fuel cell 10 generates voltage to supply power to the load 20.

[0129] Reference Figure 6 As shown in the figure, the fuel cell monitoring device includes a monitoring plate 200 and a camera 300.

[0130] The monitoring plate 200 is provided with a plurality of monitoring areas 210, the monitoring areas 210 are installed on the polar plate 100 of the fuel cell 10, the plurality of monitoring areas 210 one-to-one correspond to the plurality of partitions of the polar plate 100, each monitoring area 210 is provided with a temperature sensor and a pressure sensor, the actual temperature of the corresponding partition is measured by the temperature sensor, and the actual pressure of the corresponding partition is measured by the pressure sensor.

[0131] The plurality of actual temperatures and the plurality of actual pressures measured are transmitted to a data analysis system 230 through a data collector 220, the data analysis system 230 can be a computer terminal, the data analysis system 230 processes the actual pressure and the actual temperature of each partition, and the data analysis system 230 pre-stores the preset temperature and the preset pressure of each partition, so as to compare the actual temperature with the preset temperature and compare the actual pressure with the preset pressure subsequently.

[0132] The monitoring plate 200 is arranged in front of the polar plate 100, the monitoring plate 200 is provided with a transparent window, and the transparent window faces the plurality of partitions.

[0133] The camera 300 is arranged in front of the monitoring plate 200, and the camera 300 is used to capture actual images of the plurality of sub-zones. The camera 300 can be used to continuously capture images to obtain the flow condition of the fuel in the flow channel 110, or the camera 300 can be used to record the flow condition of the fuel in the flow channel 110, and the corresponding actual images can be extracted from the recording.

[0134] After the camera 300 captures the actual images, the actual images are sent to the image processing system 310. The image processing system 310 can be a computer terminal. The image processing system 310 can analyze the actual images to determine the failure mode in the target sub-zone, or an operator can analyze the actual images by using the image processing system 310.

[0135] In some embodiments, the monitoring device further comprises a sealing ring 400, a front pressing plate 500, and a rear pressing plate 600.

[0136] The sealing ring 400 is arranged between the monitoring plate 200 and the polar plate 100, and the sealing ring is arranged around the periphery of the polar plate 100.

[0137] The front pressing plate 500 is arranged in front of the monitoring plate 200, and the rear pressing plate 600 is arranged behind the polar plate 100. The front pressing plate 500 and the rear pressing plate 600 are connected, and the front pressing plate 500 and the rear pressing plate 600 are used to press the sealing ring 400 between the monitoring plate 200 and the polar plate 100, thereby sealing the flow channel 110 of the polar plate 100.

[0138] It can be understood by those skilled in the art that all or some of the steps in the method disclosed above and the functional modules / units in the system and the device can be implemented as software, firmware, hardware, and appropriate combinations thereof.

[0139] The terms "first", "second", "third", "fourth" and the like in the specification of this application and in the claims of the foregoing drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of the terms so

[0140] It should be understood that, in the present application, "at least one" means one or more, "multiple" means two or more. "And / or" is used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, wherein A and B can be singular or plural. The character " / " generally represents that the associated objects before and after are in an "or" relationship. "At least one of the following" or the like means any combination of these items, including any combination of single or multiple items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", wherein a, b, and c can be single or multiple.

[0141] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the above units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0142] The units described above as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or they can be distributed on multiple network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0143] In addition, each functional unit in each embodiment of the present application can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.

[0144] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes multiple instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and various program storage media.

[0145] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above-described embodiments. Various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A method of monitoring a fuel cell, characterized by, The application discloses a monitoring method for a fuel cell, the fuel cell having a polar plate with a flow channel for fuel flow, the monitoring method comprising: dividing the flow channel into a plurality of sub-zones, controlling the fuel cell to provide a preset voltage to a load; acquiring an actual output voltage of the fuel cell, when the actual output voltage is less than the preset voltage, acquiring an actual temperature and an actual pressure of each of the sub-zones; determining whether the actual temperature is equal to a preset temperature and whether the actual pressure is equal to a preset pressure, the preset temperature and the preset pressure being acquired from preset data of the sub-zones, the preset temperature being used to represent a temperature when the sub-zone is normally operated, and the preset pressure being used to represent a pressure when the sub-zone is normally operated; when the actual temperature is not equal to the preset temperature or the actual pressure is not equal to the preset pressure, marking the sub-zone as a target sub-zone; acquiring an actual image of the target sub-zone, and determining, according to the actual image, whether the target sub-zone has a membrane dry failure, a water flooding failure, a water blockage failure, an impurity blockage failure, an insufficient gas failure or a damage failure.

2. The fuel cell monitoring method according to claim 1, characterized by, The monitoring method further comprises: dividing any two adjacent sub-zones in a front-rear direction into a first sub-zone and a second sub-zone according to a direction of the fuel flow; acquiring a first current of the first sub-zone and a second current of the second sub-zone, and comparing the first current with the second current; when the second current is greater than the first current, marking the first sub-zone as the target sub-zone.

3. The fuel cell monitoring method according to claim 1, characterized by, The determining, according to the actual image, whether the target sub-zone has the membrane dry failure, the water flooding failure, the water blockage failure, the impurity blockage failure, the insufficient gas failure or the damage failure comprises: comparing the actual temperature with the preset temperature, and determining, according to the actual image, whether the target sub-zone is dry or wet; when the actual temperature is greater than the preset temperature and the target sub-zone is dry, determining that the target sub-zone has the membrane dry failure; when the actual temperature is less than the preset temperature and the target sub-zone is wet, determining that the target sub-zone has the water flooding failure.

4. The fuel cell monitoring method according to claim 1, characterized by, The determining, according to the actual image, whether the target sub-zone has the membrane dry failure, the water flooding failure, the water blockage failure, the impurity blockage failure, the insufficient gas failure or the damage failure further comprises: determining whether the actual pressure is greater than the preset pressure; when it is determined that the actual pressure is greater than the preset pressure, determining, according to the actual image, whether the target sub-zone is blocked; when it is determined that the target sub-zone is blocked, determining whether a blockage of the target sub-zone is liquid or solid; when it is determined that the blockage is liquid, determining that the target sub-zone has the water blockage failure; when it is determined that the blockage is solid, determining that the target sub-zone has the impurity blockage failure.

5. The fuel cell monitoring method according to claim 1, characterized by, The determining, according to the actual image, whether the target sub-zone has the membrane dry failure, the water flooding failure, the water blockage failure, the impurity blockage failure, the insufficient gas failure or the damage failure further comprises: determining whether the actual pressure is less than the preset pressure; when it is determined that the actual pressure is less than the preset pressure, determining, according to the actual image, whether the target sub-zone has damage. when it is determined that the target partition has no damage, determining that the target partition has the under-gas fault; when it is determined that the target partition has damage, determining that the target partition has the damage fault.

6. The fuel cell monitoring method according to claim 1, characterized by, The monitoring method further comprises: obtaining a fault position of the polar plate according to the position of the target partition, and obtaining a fault type of the polar plate according to the fault form of the target partition; counting the fault positions and the fault types of a plurality of polar plates, obtaining high-risk position information of the polar plate according to a plurality of fault positions, and obtaining high-risk fault type information of the polar plate according to a plurality of fault types.

7. The fuel cell monitoring method according to claim 1, characterized by, The monitoring method further comprises: when the actual output voltage is equal to the preset voltage, obtaining a temperature record of each partition as the preset temperature, and obtaining a pressure record of each partition as the preset pressure.

8. A fuel cell monitoring apparatus characterized by comprising: A fuel cell monitoring method as claimed in any one of claims 1 to 7.

9. The fuel cell monitoring apparatus according to claim 8, characterized by The monitoring device comprises: a monitoring plate arranged on the polar plate, the monitoring plate being provided with a plurality of monitoring areas, each monitoring area being provided with a temperature sensor and a pressure sensor, the temperature sensor being configured to obtain the actual temperature, the pressure sensor being configured to obtain the actual pressure, the monitoring plate being provided with a transparent window, and a front direction of the monitoring plate relative to the polar plate being defined as a front direction of the monitoring plate; a camera arranged in front of the monitoring plate, the camera being configured to capture the actual image through the transparent window.

10. The fuel cell monitoring apparatus according to claim 9, characterized by The monitoring device further comprises: a sealing ring arranged on a rear side of the monitoring plate, the sealing ring being arranged around a periphery of the polar plate; a front pressing plate and a rear pressing plate, the front pressing plate and the rear pressing plate being arranged on a front side and a rear side of the polar plate respectively, and the front pressing plate and the rear pressing plate being connected to press the sealing ring between the monitoring plate and the polar plate.

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