Method for controlling contamination of mea, fuel cell, vehicle, storage medium, and computer

Abstract

The application relates to the new energy technology field, in particular to an MEA pollution control method, a fuel cell, a vehicle, a storage medium and a computer; in the engine starting stage, if the minimum single piece voltage is greater than the second preset voltage, loading is carried out; if the minimum single piece voltage is less than or equal to the second preset voltage, the loading is stopped; if the minimum single piece voltage is less than or equal to the third preset voltage, unloading is carried out, and the current is set to 0; if the minimum single piece voltage is less than or equal to the fourth preset voltage, the engine is turned off; if the current is greater than or equal to the preset current, the execution is stopped; the application reduces the limit load pre-value, the unloading value and the shutdown value through the control strategy, guarantees the normal load of the engine, generates sufficient water to carry away the pollutants, reduces the occurrence of the single low phenomenon, guarantees the operation of the vehicle, and the method has the advantages of low cost, easy operation and short cycle compared with other methods.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy, in particular to a MEA pollution control method, a fuel cell, a vehicle, a storage medium and a computer. BACKGROUND

[0002] One of the common faults of the hydrogen fuel cell vehicle is single low, and one of the important reasons for single low is MEA (membrane electrode) pollution, which refers to the phenomenon that foreign matters are accumulated on the surface of MEA, causing difficulty in gas passing. The main pollution sources of MEA include oil stains and antifreeze, which affect the performance of the engine. Influence 1: The accumulation of pollution sources on the surface of MEA covers the active sites of MEA, hinders the contact between hydrogen and catalyst, and makes the catalytic reaction difficult to occur normally. Influence 2: More seriously, the main component of oil stains is olefin compounds, which will cause hydrogenation reaction in the presence of hydrogen and Pt catalyst, resulting in hydrogen deficiency and loss of catalyst activity. In addition, sulfides in oil stains have toxic effects, which can block the active sites of Pt, making the catalyst performance worse, thereby causing the single plate voltage to be low, affecting the performance of the engine, increasing the failure rate of the whole vehicle, and reducing the reliability of the vehicle.

[0003] Prior art solutions:

[0004] For the oil stain pollution of the circulating pump, the industry currently mainly improves the composition of the hydrogen circulating pump oil product, and changes the composition of the lubricating oil used by the circulating pump to an oil product that has less effect on MEA and does not cause chemical reaction.

[0005] For antifreeze pollution, the industry currently mainly improves by reducing waterway pressure and improving the preparation process of the polar plate.

[0006] Disadvantages: For the oil stain pollution of the circulating pump, the cost of replacing new oil is high, and although the problem of reaction of hydrogen in the presence of Pt catalyst can be solved after replacing the oil, the problem of covering of the active sites of the MEA catalyst cannot be solved.

[0007] For antifreeze pollution: For vehicles that have entered the market, because the system has been finalized, it is difficult to adjust the waterway pressure, and it is also difficult to replace the polar plate preparation process for the market stack, with high cost and a long time period required. SUMMARY

[0008] The technical problem to be solved by the present application is to provide a MEA pollution control method, a fuel cell, a vehicle, a storage medium and a computer, which reduce the limit load pre-value, the load throwing value and the shutdown value by adjusting the control strategy, ensure the normal load of the engine, and generate enough water to carry away the pollutants, thereby reducing the occurrence of single low phenomenon.

[0009] To solve the above technical problems, the first technical solution of the present application is:

[0010] An MEA pollution control method, in the starting stage,

[0011] If the minimum single chip voltage is greater than the second preset voltage, load;

[0012] If the minimum single chip voltage is less than or equal to the second preset voltage, stop loading;

[0013] If the minimum single chip voltage is less than or equal to the third preset voltage, unload, and the current is set to 0;

[0014] If the minimum single chip voltage is less than or equal to the fourth preset voltage, then shut down;

[0015] If the current is greater than or equal to the preset current, stop execution.

[0016] Preferably, if the minimum single chip voltage is greater than the second preset voltage, loading further comprises:

[0017] If the minimum single chip voltage is greater than the first preset voltage, the loading slope is the first slope;

[0018] If the minimum single chip voltage is greater than the second preset voltage and less than or equal to the first preset voltage, the loading slope is the second slope.

[0019] Preferably, the first slope and the second slope are less than the loading slope corresponding to the limit load preset value of the fuel cell calibration.

[0020] Preferably, the first slope and the second slope are empirical values.

[0021] Preferably, the third preset voltage is less than the voltage corresponding to the unloading value of the fuel cell calibration.

[0022] Preferably, the fourth preset voltage is less than the voltage corresponding to the shutdown value of the fuel cell calibration.

[0023] To solve the above technical problems, the second technical solution of the present application is:

[0024] A fuel cell, comprising a stack, the stack is operated according to the above-mentioned MEA pollution control method.

[0025] To solve the above technical problems, the third technical solution of the present application is:

[0026] A vehicle, comprising the above-mentioned fuel cell.

[0027] To solve the above technical problems, the fourth technical solution of the present application is:

[0028] A storage medium storing a computer program, the computer program being executed by a processor to implement the MEA pollution control method.

[0029] To solve the above technical problems, the fifth technical solution of the present application is:

[0030] A computer comprising at least a memory and a processor, the memory storing a computer program, and the processor implementing the MEA pollution control method when executing the computer program on the memory.

[0031] The present application has the beneficial effect that by controlling the strategy to reduce the limit load pre-value, the load value, and the shutdown value, the engine is ensured to be normally loaded, and sufficient water is generated to carry away the pollutants, thereby reducing the occurrence of single low (the phenomenon that one or individual piece voltage in a fuel cell stack is significantly lower than the average voltage) and ensuring the operation of the vehicle. This method has the advantages of low cost, easy operation, and short cycle compared with other methods. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 A logic block diagram of the MEA pollution control method of the present application. DETAILED DESCRIPTION

[0033] To explain the technical content, purposes and effects of the present application in detail, the following will be described in conjunction with the embodiments and the accompanying drawings.

[0034] Example 1

[0035] Referring to Figure 1 An MEA pollution control method, in the engine starting phase,

[0036] If the lowest single piece voltage is greater than the first preset voltage, the loading slope is the first slope;

[0037] If the lowest single piece voltage is greater than the second preset voltage and less than or equal to the first preset voltage, the loading slope is the second slope;

[0038] If the lowest single piece voltage is less than or equal to the second preset voltage, stop loading;

[0039] If the lowest single piece voltage is less than or equal to the third preset voltage, unload, and the current is set to 0;

[0040] If the lowest single piece voltage is less than or equal to the fourth preset voltage, shut down;

[0041] If the current is greater than or equal to the preset current, stop execution.

[0042] Among them

[0043] The first slope and the second slope are less than a loading slope corresponding to a limit load pre-value of the fuel cell calibration.

[0044] The first slope and the second slope are empirical values.

[0045] The third pre-set voltage is less than a voltage corresponding to a throw load value of the fuel cell calibration.

[0046] The fourth pre-set voltage is less than a voltage corresponding to a shutdown value of the fuel cell calibration.

[0047] The limit load pre-value, the throw load value and the shutdown value of the fuel cell calibration are the highest limit load pre-value, the throw load value and the shutdown value set by a fuel cell manufacturer.

[0048] Embodiment Two

[0049] A fuel cell comprising a stack, wherein the stack is operated according to the MEA pollution control method of Embodiment One.

[0050] Embodiment Three

[0051] A vehicle comprising the fuel cell of Embodiment Two.

[0052] Embodiment Four

[0053] A storage medium storing a computer program, wherein the computer program is executed by a processor to implement the MEA pollution control method of Embodiment One.

[0054] Embodiment Five

[0055] A computer comprising at least a memory and a processor, wherein the memory stores a computer program, and the processor implements the MEA pollution control method of Embodiment One when executing the computer program stored on the memory.

[0056] The above description is merely an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent transformation or direct or indirect application in the related technical field based on the content of the present application specification and drawings is also included in the patent protection scope of the present application.

Claims

1. A method for controlling MEA pollution, characterized in that, During the startup phase Loading occurs when the minimum single-chip voltage is greater than the second preset voltage. Loading will stop if the lowest single-chip voltage is less than or equal to the second preset voltage. Load is thrown if the lowest single-chip voltage is less than or equal to the third preset voltage, and the current is set to 0. The device will shut down if the lowest single-chip voltage is less than or equal to the fourth preset voltage. If the current is greater than or equal to the preset current, the process will stop. If the minimum single-chip voltage is greater than the second preset voltage, the following further processing is applied: If the minimum single-chip voltage is greater than the first preset voltage, the loading slope is the first slope. If the minimum single-chip voltage is greater than the second preset voltage and less than or equal to the first preset voltage, then the loading slope is the second slope. The first slope and the second slope are less than the loading slope corresponding to the limit load pre-value calibrated for the fuel cell.

2. The MEA pollution control method according to claim 1, characterized in that, The first slope and the second slope are empirical values.

3. The MEA pollution control method according to claim 1, characterized in that, The third preset voltage is less than the voltage corresponding to the load dump value calibrated for the fuel cell.

4. The MEA pollution control method according to claim 1, characterized in that, The fourth preset voltage is less than the voltage corresponding to the shutdown value calibrated by the fuel cell.

5. A fuel cell, characterized in that, Includes a fuel cell stack, which operates according to the MEA pollution control method according to any one of claims 1-4.

6. A vehicle, characterized in that, Includes the fuel cell described in claim 5.

7. A storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the MEA pollution control method according to any one of claims 1-4.

8. A computer, comprising at least a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program on the memory, it implements the MEA pollution control method according to any one of claims 1-4.

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