Method for mitigating membrane dryout, fuel cell, vehicle, apparatus, and storage medium

Abstract

The present application relates to the technical field of stack film dry, and particularly relates to a method for relieving film dry control, a fuel cell, a vehicle, an equipment and a storage medium, in the engine starting stage, the engine program automatically reads the minimum single piece voltage of the fuel cell, if the minimum single piece voltage is greater than the second preset voltage, loading is loaded; if the minimum single piece voltage is less than or equal to the second preset voltage, loading is stopped; if the minimum single piece voltage is less than or equal to the third preset voltage, unloading is thrown, 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 or the time current integral value is greater than the preset current integral value, then the execution is stopped. Through the control strategy, the limit load, the unloading value and the shutdown value are reduced, the engine is normally loaded, the single low caused by the film dry is solved, and the film dry problem can be solved online without replacing the engine.

Description

Technical Field

[0001] This invention relates to the field of membrane dryness technology, and particularly to a method for mitigating membrane dryness control, fuel cells, vehicles, equipment, and storage media. Background Technology

[0002] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy. It is also known as an electrochemical generator and is the fourth type of power generation technology after hydropower, thermal power generation, and nuclear power generation.

[0003] Fuel cells can experience membrane drying due to prolonged storage or poor operating conditions. Membrane drying refers to the phenomenon where the membrane electrode assembly (MEA) becomes dry due to lack of water. Membrane drying leads to a decrease in the overall performance of the fuel cell, affecting vehicle operation and reducing the lifespan of the fuel cell. To improve the reliability of vehicle operation, it is necessary to solve the membrane drying problem efficiently and quickly. The current technical solution is usually to remove the fuel cell stack from the engine for repair, but the repair time, material resources, and labor costs are high.

[0004] Existing technical solution: Dismantle the fuel cell stack and repair the faulty film electrodes.

[0005] Disadvantages of existing technologies: The timeliness of existing technology solutions cannot be guaranteed. It is necessary to remove the engine from the vehicle and then remove the fuel cell stack from the engine and repair it. This solution is extremely costly in terms of time, materials, and manpower, and is not convenient to implement. Summary of the Invention

[0006] To address the issue of membrane dryness in existing technologies that require disassembling the engine and fuel cell stack, this invention provides a method for mitigating membrane dryness, a fuel cell, a vehicle, equipment, and a storage medium that can resolve the problem online without replacing the engine.

[0007] The technical solution of the present invention is as follows:

[0008] As one aspect of this invention, the present invention provides a method for mitigating membrane dryness control, wherein during the start-up phase, the engine program automatically reads the lowest single-cell voltage of the fuel cell.

[0009] Loading occurs when the minimum single-chip voltage is greater than the second preset voltage.

[0010] Loading will stop if the lowest single-chip voltage is less than or equal to the second preset voltage.

[0011] 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.

[0012] The device will shut down if the lowest single-chip voltage is less than or equal to the fourth preset voltage.

[0013] If the current is greater than or equal to the preset current or the time-current integral value is greater than the preset current integral value, the execution will stop.

[0014] Furthermore, if the minimum single-chip voltage is greater than the second preset value, the loading further includes:

[0015] If the minimum single-chip voltage is greater than the first preset value, then the first slope is applied;

[0016] If the lowest single-chip voltage is greater than the second preset value and less than or equal to the first preset value, then the second slope is applied.

[0017] Furthermore, 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.

[0018] Furthermore, the first slope and the second slope are empirical values.

[0019] Furthermore, the third preset voltage is greater than or equal to the voltage corresponding to the load dump value calibrated by the fuel cell.

[0020] Furthermore, the fourth preset voltage is greater than or equal to the voltage corresponding to the shutdown value calibrated by the fuel cell.

[0021] As another aspect of the present invention, the present invention provides a fuel cell including a stack, the stack operating according to the membrane dryness mitigation control method described in any of the foregoing embodiments.

[0022] As another aspect of the present invention, the present invention provides a vehicle that includes the fuel cell described in the above embodiments.

[0023] As another aspect of the present invention, the present invention also provides an electronic device, including at least a memory and a processor, wherein the memory stores a computer program, and the processor implements the membrane dryness mitigation control method described in any one of the above embodiments when executing the computer program in the memory.

[0024] As another aspect of the present invention, the present invention provides a storage medium storing a computer program, which, when executed by a processor, implements the membrane dryness mitigation control method described in any of the above embodiments.

[0025] The beneficial effects of the embodiments of the present invention include at least some of the following: by reducing the load pre-limit, load dump value, and shutdown value through the control strategy, the engine can be guaranteed to be under normal load, the low voltage caused by membrane drying can be solved online without replacing the engine, sufficient water is generated to wet the membrane, and the time current integral value and maximum current are optimized, thereby ensuring that the low voltage caused by membrane drying is effectively solved, ensuring the operation of the vehicle. The implementation cost of this control method is low, easy to operate and has a short cycle. Attached Figure Description

[0026] Figure 1 This is a logic block diagram of a method for mitigating membrane dryness according to a specific embodiment of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] One method to mitigate membrane dryness control involves the engine program automatically reading the lowest single-cell voltage of the fuel cell during the start-up phase.

[0030] Loading occurs when the minimum single-chip voltage is greater than the second preset voltage B.

[0031] Loading stops if the lowest single-chip voltage is less than or equal to the second preset voltage B.

[0032] Load is thrown if the lowest single-chip voltage is less than or equal to the third preset voltage C, and the current is set to 0.

[0033] The device will shut down if the lowest single-chip voltage is less than or equal to the fourth preset voltage D.

[0034] If the current is greater than or equal to the preset current γ or the time current integral value is greater than the preset current integral value δ, then execution will stop.

[0035] Furthermore, if the minimum single-chip voltage is greater than the second preset voltage B, the loading further includes:

[0036] If the minimum single-chip voltage is greater than the first preset value A, then the first slope α is applied;

[0037] If the lowest single-chip voltage is greater than the second preset value B and less than or equal to the first preset value A, then the second slope β is applied.

[0038] Furthermore, the first slope α and the second slope β are less than the loading slope corresponding to the limit load pre-value calibrated for the fuel cell.

[0039] Furthermore, the first slope α and the second slope β are empirical values.

[0040] Furthermore, the third preset voltage C is greater than or equal to the voltage corresponding to the load dump value calibrated by the fuel cell.

[0041] Furthermore, the fourth preset voltage D is greater than or equal to the voltage corresponding to the shutdown value calibrated by the fuel cell.

[0042] Example 2

[0043] A fuel cell includes a stack that operates according to the membrane dryness control method described in any of the above embodiments.

[0044] Example 3

[0045] A vehicle comprising the fuel cell described in the above embodiments.

[0046] Example 4

[0047] An electronic device includes at least a memory and a processor, wherein the memory stores a computer program, and the processor implements the membrane dryness mitigation control method described above when executing the computer program in the memory.

[0048] Example 5

[0049] A storage medium storing a computer program, which, when executed by a processor, implements the membrane dryness mitigation control method described in any one of the preceding claims.

[0050] By reducing the load pre-limit, load dump value, and shutdown value through control strategies, the engine can be guaranteed to be under normal load, thus solving the low voltage problem caused by membrane dryness. The membrane dryness problem can be solved online without replacing the engine. Sufficient water is generated to wet the membrane. The time current integral value and maximum current have been optimized to effectively solve the problem of low voltage caused by membrane dryness, ensuring vehicle operation. This control method has low implementation cost, is easy to operate, and has a short cycle.

[0051] To address the membrane drying problem in vehicle fuel cell stacks, there is no need to disassemble the fuel cell stack. By leveraging the mechanism of membrane drying and operational experience with vehicles in the market, a control strategy can be implemented to resolve the membrane drying problem online.

[0052] This control strategy improves problem-solving efficiency, avoids replacing the engine and fuel cell stack, saves time, manpower, and material costs, and enhances vehicle reliability and safety.

[0053] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method for mitigating membrane dryness, characterized in that: During the start-up phase, the engine program automatically reads the lowest single-cell voltage of the fuel cell. If the lowest single-cell voltage is greater than the second preset voltage, it will be loaded. 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 or the time current integral value is greater than the preset current integral value, the execution will stop. The loading process, where the minimum single-chip voltage is greater than the second preset voltage, further includes: If the minimum single-chip voltage is greater than the first preset value, then the first slope is applied; If the lowest single-chip voltage is greater than the second preset voltage and less than or equal to the first preset value, then the second slope is applied; Wherein, 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; Wherein, the first slope and the second slope are empirical values; Wherein, the third preset voltage is greater than or equal to the voltage corresponding to the load dump value calibrated by the fuel cell; The fourth preset voltage is greater than or equal to the voltage corresponding to the shutdown value calibrated by the fuel cell.

2. A fuel cell, comprising a stack, characterized in that: The fuel cell stack operates according to the method for mitigating membrane dryness control as described in claim 1.

3. A vehicle, characterized in that: The vehicle includes the fuel cell as described in claim 2.

4. An electronic device, comprising at least a memory and a processor, characterized in that: The memory stores a computer program, and the processor implements the membrane dryness control method of claim 1 when executing the computer program in the memory.

5. A storage medium storing a computer program, characterized in that: When the computer program is executed by the processor, it implements the membrane dryness control method of claim 1.

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