Hydrogen-oxygen renewable fuel cell system

Abstract

The invention discloses an oxyhydrogen renewable fuel cell system, and relates to the technical field of fuel cells and water electrolysis. The system comprises a renewable fuel cell stack, a hydrogen module, an oxygen module, a cooling module, a hydrogen and oxygen concentration detection module and a safety control module. The system adopts a closed double-cabin structure, a hydrogen side cabin and an oxygen side cabin are physically separated through a separation plate, and nitrogen is filled to maintain micro-positive pressure 10 kPa higher than environment pressure. The hydrogen and oxygen concentration detection module monitors the gas concentration in the cabin in real time by measuring the voltage difference between the two catalytic layers based on the concentration difference battery principle. The safety control module controls operation of the cooling fan, the exhaust valve and the water pump according to signals of the concentration sensor and the temperature sensor, and safety protection measures are automatically started when the concentration or the temperature exceeds the limit. The safety problem of hydrogen and oxygen leakage is effectively solved, and the safety and reliability of the system under the dynamic working conditions of vibration, movement and the like are remarkably improved.

Description

Technical Field

[0001] This invention relates to the fields of fuel cell and water electrolysis technology, and in particular to a hydrogen-oxygen renewable fuel cell system. Background Technology

[0002] Hydrogen-oxygen renewable fuel cells (URFCs) are devices that can achieve bidirectional conversion between electrical and chemical energy, combining the functions of hydrogen production through water electrolysis and fuel cell power generation. They have broad application prospects in aerospace, portable power supplies and other fields.

[0003] However, during operation, especially under vibration or movement conditions, hydrogen and oxygen may leak from URFCs. Hydrogen is flammable and explosive, while oxygen supports combustion; a mixture of the two can easily lead to a safety accident. Existing URFC systems are inadequate in hydrogen and oxygen leak detection and safety protection, lacking an efficient and reliable safety management mechanism.

[0004] Therefore, it is of great significance to develop a hydrogen-oxygen regenerative fuel cell system with real-time leak detection and active safety protection functions. Summary of the Invention

[0005] The purpose of this invention is to provide a hydrogen-oxygen renewable fuel cell system to solve the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides a hydrogen-oxygen regenerative fuel cell system, comprising:

[0007] A renewable fuel cell stack is used to produce hydrogen and oxygen by electrolyzing water in electrolysis mode, and to generate electricity using hydrogen and oxygen in power generation mode.

[0008] The hydrogen module includes a hydrogen tank and a hydrogen pipeline, wherein the hydrogen tank is connected to the hydrogen-side compartment of the renewable fuel cell stack via the hydrogen pipeline.

[0009] An oxygen module includes an oxygen tank and an oxygen pipeline, wherein the oxygen tank is connected to the oxygen-side compartment of the renewable fuel cell stack via the oxygen pipeline.

[0010] The cooling module includes a water pump, a water storage tank, and a cooling channel. The water storage tank is connected to the renewable fuel cell stack through the cooling channel, and the water pump is installed on the cooling channel.

[0011] The hydrogen and oxygen concentration detection module is used to detect the gas concentration in the hydrogen-side chamber and oxygen-side chamber of the renewable fuel cell stack in real time.

[0012] The safety control module is used to receive signals from various sensors and control the actuators.

[0013] The hydrogen-oxygen regenerative fuel cell system adopts a closed dual-chamber structure. The hydrogen-side chamber and the oxygen-side chamber are physically separated by a partition plate and filled with nitrogen to maintain a slightly positive pressure 10 kPa higher than the ambient pressure.

[0014] Preferably, the hydrogen and oxygen concentration detection module includes an oxygen concentration detection module and a hydrogen concentration detection module, and both the oxygen concentration detection module and the hydrogen concentration detection module include:

[0015] Diaphragm;

[0016] A first base and a second base, both of which are made of insulating material and have a central opening;

[0017] A first catalyst layer and a second catalyst layer are respectively disposed on both sides of the diaphragm and connected to a voltage measuring module via wires to measure the voltage difference between them.

[0018] A sealing ring is used to seal the first catalyst layer and the second catalyst layer;

[0019] The first base has a central opening sealed with a reference gas of known concentration, while the second base has a central opening that is connected to the environment of the chamber to be tested.

[0020] Preferably, the hydrogen concentration detection module and the oxygen concentration detection module have symmetrical structures;

[0021] The oxygen concentration detection module has a central opening in the first base sealed with oxygen of a reference concentration, and the central opening in the second base of the oxygen concentration detection module is connected to the oxygen side chamber environment.

[0022] The hydrogen concentration detection module has a reference concentration of hydrogen gas sealed in the central opening of the first base, and the hydrogen concentration detection module has a central opening in the second base that is connected to the hydrogen side chamber environment.

[0023] Preferably, the walls of both the hydrogen-side chamber and the oxygen-side chamber are made of lightweight material with high thermal conductivity, and both chambers are equipped with cooling fans to accelerate gas convection within the chambers and exchange heat with the environment through the chamber walls.

[0024] Preferably, the safety control module is a central controller that receives signals from the pressure sensor, temperature sensor, output voltage of the hydrogen / oxygen concentration detection module, system loop ammeter, and voltmeter from the hydrogen-side chamber and the oxygen-side chamber; the safety control module outputs control signals to the water pump, hydrogen / oxygen supply solenoid valve, water circuit control solenoid valve, safety exhaust solenoid valve, and cooling fans on the hydrogen-side and oxygen-side.

[0025] Preferably, the safety control module executes the following control method:

[0026] When the system starts up, it reads the initial voltage value V of the hydrogen and oxygen concentration detection module. O2, initial With V H2, initial ;

[0027] Real-time acquisition of calibrated concentration voltage value V O2, correct With V H2, correct And compare it with a preset threshold;

[0028] Real-time monitoring of the temperature T in the oxygen-side compartment and the hydrogen-side compartment O2 With T H2 and the preset reference temperature T O2,ref With T H2,ref Compare;

[0029] When V O2, correct or V H2, correct Exceeding limits, or T O2 or T H2 When the limit is exceeded, the cooling fan of the corresponding compartment will be started and the exhaust valve will be opened; when the fan speed required for concentration control and temperature control conflict, the larger value will be used for operation.

[0030] Among them, V O2, correct =V O2 -V O2, initial ; V O2 T is the output voltage of the oxygen concentration monitoring module in the oxygen-side chamber. O2 P represents the temperature near the fuel cell stack within the oxygen side compartment. O2,ref P represents the concentration of sealed oxygen in the oxygen concentration monitoring module. O2,env The measured oxygen concentration inside the oxygen-side chamber;

[0031] V H2, correct =V H2 -V H2, initial ; V H2 T is the output voltage of the hydrogen concentration monitoring module in the hydrogen-side chamber. H2 P represents the temperature near the fuel cell stack within the hydrogen side compartment. H2,ref P represents the concentration of sealed hydrogen gas in the hydrogen concentration monitoring device. H2,env This represents the measured hydrogen concentration inside the hydrogen-side chamber.

[0032] Preferably, the hydrogen tank and the oxygen tank are located on opposite sides of the renewable fuel cell stack, and the hydrogen pipeline and the oxygen pipeline are physically isolated by a lightweight material plate.

[0033] Preferably, the hydrogen and oxygen concentration detection module is installed at the connection between the hydrogen pipeline and the regenerative fuel cell stack, and at the connection between the oxygen pipeline and the regenerative fuel cell stack.

[0034] Preferably, the housing of the safety control module is integrated with the system housing into a single integrated housing, and an external power supply for supplying power to the safety control module is provided on the outside of the integrated housing; the external power supply has a detachable housing, and the internal space of the detachable housing is isolated from the gas chamber.

[0035] Preferably, the system further includes an external power input module and a load module, enabling the system to switch between water electrolysis hydrogen production mode and fuel cell power generation mode.

[0036] Compared with the prior art, the present invention has the following advantages and technical effects:

[0037] 1. The hydrogen and oxygen concentration detection module monitors the leakage situation in real time, and the safety control module responds quickly, fundamentally eliminating the risk of explosion.

[0038] 2. The system adopts hydrogen-oxygen isolation and micro-positive pressure design to effectively prevent external gas infiltration and improve the safety redundancy of the system under dynamic operating conditions.

[0039] 3. Through intelligent closed-loop control strategy, multi-parameter collaborative management is achieved to ensure the safe, stable and efficient operation of the system. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the overall structure of the hydrogen-oxygen regenerative fuel cell system of the present invention;

[0042] Figure 2 This is a schematic diagram of the input and output signals of the central control module of the present invention;

[0043] Figure 3 This is a flowchart illustrating the safe operation method executed by the central control module of this invention. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other. The described embodiments are merely some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. The invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] This invention provides a hydrogen-oxygen regenerative fuel cell system, comprising:

[0046] A renewable fuel cell stack is used to produce hydrogen and oxygen by electrolyzing water in electrolysis mode, and to generate electricity using hydrogen and oxygen in power generation mode.

[0047] The hydrogen module includes a hydrogen tank and a hydrogen pipeline. The hydrogen tank is connected to the hydrogen-side compartment of the renewable fuel cell stack via the hydrogen pipeline.

[0048] The oxygen module includes an oxygen tank and oxygen pipelines. The oxygen tank is connected to the oxygen-side compartment of the renewable fuel cell stack via the oxygen pipelines.

[0049] The cooling module includes a water pump, a water tank, and a cooling channel. The water tank is connected to the renewable fuel cell stack through the cooling channel, and the water pump is installed on the cooling channel.

[0050] The hydrogen and oxygen concentration detection module is used to detect the gas concentration in the hydrogen-side compartment and oxygen-side compartment of the renewable fuel cell stack in real time.

[0051] The safety control module is used to receive signals from various sensors and control the actuators.

[0052] The hydrogen-oxygen regenerative fuel cell system adopts a closed dual-chamber structure. The hydrogen-side chamber and the oxygen-side chamber are physically separated by a partition plate and filled with nitrogen to maintain a slightly positive pressure 10 kPa higher than the ambient pressure.

[0053] The system uses lightweight partitions to physically isolate the hydrogen and oxygen systems, and fills the two side chambers with nitrogen and maintains a slight positive pressure 10 kPa higher than the ambient pressure to prevent external air from seeping in, avoid the formation of a flammable gas environment, and improve the system's safety redundancy under dynamic conditions such as vibration and movement.

[0054] The solution has been further optimized. The hydrogen and oxygen concentration detection module includes an oxygen concentration detection module and a hydrogen concentration detection module. Both the oxygen concentration detection module and the hydrogen concentration detection module include:

[0055] Diaphragm;

[0056] The first base and the second base are both made of insulating material and have a central opening.

[0057] The first catalyst layer and the second catalyst layer are respectively disposed on both sides of the diaphragm and connected to a voltage measuring module via wires to measure the voltage difference between them; the catalyst layer is a carbon-supported platinum catalyst layer.

[0058] A sealing ring is used to seal the first and second catalyst layers.

[0059] The first base has a central opening sealed with a reference gas of known concentration, while the second base has a central opening that is connected to the environment of the chamber to be tested.

[0060] The design was further optimized so that the hydrogen concentration detection module and the oxygen concentration detection module have symmetrical structures.

[0061] The central opening of the first base in the oxygen concentration detection module is sealed with oxygen of a reference concentration, and the central opening of the second base in the oxygen concentration detection module is connected to the oxygen side chamber environment.

[0062] The central opening of the first base in the hydrogen concentration detection module is sealed with hydrogen gas of a reference concentration, while the central opening of the second base in the hydrogen concentration detection module is connected to the hydrogen side chamber environment.

[0063] The design was further optimized so that the walls of both the hydrogen-side and oxygen-side compartments are made of lightweight materials with high thermal conductivity. Both compartments are equipped with cooling fans to accelerate gas convection within the compartments and exchange heat with the environment through the compartment walls.

[0064] The bulkheads are made of lightweight materials with high thermal conductivity. Cooling fans are installed in both compartments to accelerate gas convection within their respective compartments and utilize thermal convection between the bulkheads and the environment to remove heat. Compact oxygen and hydrogen concentration detection modules are installed. When concentrations exceed limits, the cooling fans in each compartment mix the gas within that compartment, then open the exhaust valves of each compartment. The concentration is reduced by exhausting gas through the pressure difference between the inside and outside of the compartment. In this process, the cooling fans play a crucial role in gas mixing.

[0065] The scheme is further optimized so that the safety control module is a central controller that receives signals from the pressure sensors, temperature sensors, output voltage of the hydrogen / oxygen concentration detection module, system loop ammeter and voltmeter from the hydrogen-side and oxygen-side chambers. The safety control module outputs control signals to the water pump, hydrogen / oxygen supply solenoid valve, water circuit control solenoid valve, safety exhaust solenoid valve, and cooling fans on the hydrogen-side and oxygen-side.

[0066] The central controller dynamically adjusts fan speed, valve opening and closing, and water pump flow based on multi-source sensor signals such as concentration, temperature, and pressure, forming a closed-loop control system of "monitoring-judgment-execution". When concentration or temperature is abnormal, the system can automatically select the optimal response strategy (such as setting the maximum fan speed) to ensure that safety response takes precedence over energy efficiency optimization.

[0067] To further optimize the scheme, the safety control module executes the following control methods:

[0068] When the system starts up, it reads the initial voltage value V of the hydrogen and oxygen concentration detection module. O2, initial With V H2, initial ;

[0069] Real-time acquisition of calibrated concentration voltage value V O2, correct With V H2, correct And compare it with a preset threshold;

[0070] Real-time monitoring of the temperature T in the oxygen-side compartment and the hydrogen-side compartment O2 With T H2 and the preset reference temperature T O2,ref With T H2,ref Compare;

[0071] When V O2, correct or V H2, correct Exceeding limits, or T O2 or T H2 When the limit is exceeded, the cooling fan of the corresponding compartment will be started and the exhaust valve will be opened; when the fan speed required for concentration control and temperature control conflict, the larger value will be used for operation.

[0072] Among them, V O2, correct =V O2 -V O2, initial ; V O2 T is the output voltage of the oxygen concentration monitoring module in the oxygen-side chamber. O2 P represents the temperature near the fuel cell stack within the oxygen side compartment. O2,ref P represents the concentration of sealed oxygen in the oxygen concentration monitoring module. O2,env The measured oxygen concentration inside the oxygen-side chamber;

[0073] V H2, correct =V H2 -V H2, initial ; V H2 T is the output voltage of the hydrogen concentration monitoring module in the hydrogen-side chamber. H2 P represents the temperature near the fuel cell stack within the hydrogen side compartment. H2,ref P represents the concentration of sealed hydrogen gas in the hydrogen concentration monitoring device. H2,env This represents the measured hydrogen concentration inside the hydrogen-side chamber.

[0074] The design was further optimized so that the hydrogen tank and oxygen tank are located on opposite sides of the renewable fuel cell stack, and the hydrogen pipeline and oxygen pipeline are physically isolated by a lightweight material plate.

[0075] The design was further optimized by installing hydrogen and oxygen concentration detection modules at the connection points between the hydrogen pipeline and the renewable fuel cell stack, as well as between the oxygen pipeline and the renewable fuel cell stack.

[0076] The design is further optimized by integrating the housing of the safety control module with the system housing into a single integrated housing. An external power supply for powering the safety control module is located on the outside of the integrated housing. The external power supply has a removable housing, and the internal space of the removable housing is isolated from the gas chamber.

[0077] Further optimizations include an external power input module and a load module, enabling the system to switch between water electrolysis hydrogen production mode and fuel cell power generation mode.

[0078] The hydrogen-oxygen regenerative fuel cell system provided by this invention features a highly integrated dual-chamber isolation structure whose outer shell is composed of two independent chamber components. These two components are permanently joined by a highly airtight continuous weld extending along the system's axis, thus forming a physically absolutely isolated hydrogen-side chamber and an oxygen-side chamber. The fuel cell stack is rigidly fixed to the center of this welded partition structure, with its two reaction surfaces facing the hydrogen and oxygen chambers, respectively. Hydrogen and oxygen are independently introduced into the system via integrated flow channel interfaces on their respective chamber shells. Hydrogen is strictly confined to the hydrogen chamber for circulation, reacting with the anode side of the fuel cell stack; oxygen is strictly confined to the oxygen chamber for circulation, reacting with the cathode side of the fuel cell stack. The reacting gases on both sides are completely blocked by the central welded isolation barrier at all times, fundamentally eliminating the risk of cross-mixing within the working chamber. Water produced during the reaction and unreacted gases are also managed and discharged through integrated flow channels within their respective chambers.

[0079] Example

[0080] like Figure 1 As shown, the fuel cell stack of this system is composed of a series of individual units consisting of an oxygen / hydrogen side gas distribution layer, a catalyst layer, and a solid polymer electrolyte membrane. The two end plates provide mechanical clamping and are equipped with flow channel interfaces.

[0081] Electrolysis hydrogen production mode: Powered by an external power source, water pump supplies reaction water, and the fuel cell stack electrolyzes water to produce hydrogen and oxygen, which are then stored in corresponding storage tanks.

[0082] Fuel cell power generation mode: Hydrogen and oxygen are supplied to the fuel cell stack from the storage tank through a two-way valve, and an electrochemical reaction occurs to generate electricity and supply power to the load. The reaction water is recycled back to the storage tank for reuse.

[0083] Throughout operation, the central controller continuously receives signals from multiple sensors in the hydrogen, oxygen, water, and fuel cell systems, dynamically adjusting actuators such as valves, fans, and pumps to achieve coordinated operation of efficient energy conversion and system safety management. The hydrogen and oxygen concentration detection module monitors ambient gas concentrations in real time. If the concentration exceeds a safety threshold, it immediately triggers an alarm, closes relevant valves, stops the reaction, and simultaneously starts fans to mix and exhaust gases until the concentration returns to a safe range. During maintenance, nitrogen or air can be added to the compartment to maintain detection sensitivity and operational safety.

[0084] like Figure 2 As shown, the safety control system constructed in this invention is centered on a central controller, forming a closed-loop control architecture that integrates monitoring, decision-making, and execution. The diagram clearly outlines the logical relationship between the signal interfaces of the central controller and the system functional modules, as detailed below:

[0085] The central controller collects operating status parameters in real time from its input signals.

[0086] Pressure feedback: The controller receives pressure from the hydrogen and oxygen side pressure sensors (P... H2 , P O2 The signal is used to continuously monitor the pressure status of the two compartments, ensure the stability of the micro-positive pressure environment, and provide a basis for detecting possible pressure anomalies (such as pressure drop caused by leakage).

[0087] Electrical parameter monitoring: Ammeters and voltmeters in the system loop provide the controller with the core operating parameters of the fuel cell stack. These parameters are used to determine whether the system is in power generation or electrolysis mode, to assess output / input power, and to perform energy management.

[0088] Temperature monitoring: Temperature sensors (T) installed on the end plates of the hydrogen and oxygen sides. H2 , T O2 () Directly monitor the temperature of the fuel cell stack reaction zone.

[0089] Concentration monitoring: A hydrogen / oxygen concentration sensor based on the concentration cell principle outputs a voltage signal (V). H2 V O2 The voltage value is transmitted to the controller, and this voltage value is a function of the partial pressure (concentration) of the corresponding gas in the environment, enabling early detection of gas leaks.

[0090] The controller's output signal drives each actuator to respond:

[0091] Fluid control: The controller sends analog signals to the water pump ( To regulate its flow rate; and simultaneously supply a series of solenoid valves (including hydrogen / oxygen supply solenoid valves). / Water circuit control solenoid valve / and safety exhaust solenoid valve / It issues switching commands to precisely manage the flow and on / off of reactant gases and cooling water.

[0092] Environmental control: The controller provides cooling fans to the hydrogen and oxygen sides ( , Output speed control signal. The fan speed can be dynamically adjusted according to the level of temperature or concentration abnormality, and the gas in the chamber is mixed during emergency exhaust to ensure uniform concentration of the exhaust gas.

[0093] Figure 3 The core safety management algorithm embedded within the controller is demonstrated. It is a continuously running, closed-loop decision-making process that ensures real-time response and handling of anomalies in hydrogen and oxygen concentration and temperature. Its logical flow can be analyzed as follows:

[0094] 1. Initialization and Calibration

[0095] After the fuel cell stack starts up, the control cycle begins. First, the initial voltage value (V) of the current hydrogen / oxygen concentration sensor is read. H2, initial V O2, initial ), and use the formula:

[0096] V H2, correct =V H2 -V H2, initial and V O2, correct =V O2 -V O2, initial ;

[0097] Subsequent measurements are calibrated in real time to eliminate baseline drift and ensure the accuracy of concentration monitoring data.

[0098] 2. Multi-parameter safety criteria

[0099] The controller uses the following formula:

[0100] and ;

[0101] Continuously calculate the ratio of the calibrated concentration voltage value to the initial value. and and compare it with a preset security threshold ( , Compare the two data points. Simultaneously, compare the real-time temperature (T). H2 , T O2 ) and the preset maximum allowable temperature (T) H2,ref , T O2,ref (Compare)

[0102] 3. Decision-making and execution

[0103] Normal state: If all comparison results are within limits (i.e., the hydrogen / oxygen concentration ratio and temperature are both below the threshold) and the stack is still running, the system returns to step 1 and continues to perform cyclic monitoring.

[0104] Safe shutdown: If all parameters are normal but the fuel cell stack receives a shutdown command, the control program will exit first.

[0105] Anomaly Handling: If any of the above four comparison conditions is not met, an abnormal state is determined. The controller will immediately generate two sets of control signals: one based on concentration anomaly (V... fan,H2,2 V fan,O2,2 Another set is based on temperature anomalies (V) fan,H2,1 V fan,O2,1 Based on the principle of "safety first," the controller uses the following formula:

[0106] V fan,H2,max = {V fan,H2,1 V fan,H2,2} max With V fan,O2,max = {V fan,O2,1 V fan,O2,2} max ;

[0107] The final fan speed command is determined to handle the most severe operating conditions. Simultaneously, the system will shut off the hydrogen / oxygen supply solenoid valve and the water circuit solenoid valve to cut off the gas supply, and open the safety vent solenoid valve to initiate the emergency venting procedure.

[0108] pass Figure 2 and Figure 3 Through collaborative design, this invention enables multi-dimensional and intelligent safety monitoring of the operating status of an integrated renewable fuel cell system.

[0109] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A hydrogen-oxygen regenerative fuel cell system, characterized by, The application relates to a hydrogen-oxygen regenerative fuel cell system. The hydrogen-oxygen regenerative fuel cell system comprises a regenerative fuel cell stack for electrolyzing water to produce hydrogen and oxygen in an electrolysis mode and generating electricity by using hydrogen and oxygen in a power generation mode; a hydrogen module comprising a hydrogen tank and a hydrogen pipeline, the hydrogen tank being connected with a hydrogen side cabin of the regenerative fuel cell stack through the hydrogen pipeline; an oxygen module comprising an oxygen tank and an oxygen pipeline, the oxygen tank being connected with an oxygen side cabin of the regenerative fuel cell stack through the oxygen pipeline; a cooling module comprising a water pump, a water storage tank and a cooling flow channel, the water storage tank being connected with the regenerative fuel cell stack through the cooling flow channel, and the water pump being installed on the cooling flow channel; a hydrogen-oxygen concentration detection module for detecting the gas concentration in the hydrogen side cabin and the oxygen side cabin of the regenerative fuel cell stack in real time; and a safety control module for receiving signals of various sensors and controlling actuators. The hydrogen-oxygen regenerative fuel cell system adopts a closed double-cabin structure, the hydrogen side cabin and the oxygen side cabin are physically separated by a separation plate and filled with nitrogen to maintain a micro-positive pressure of 10 kPa higher than the ambient pressure. The hydrogen-oxygen concentration detection module comprises an oxygen concentration detection module and a hydrogen concentration detection module, and the oxygen concentration detection module and the hydrogen concentration detection module both comprise a diaphragm, first and second bases made of insulating materials and provided with central openings, first and second catalytic layers arranged on the two sides of the diaphragm and connected with a voltage measurement module through wires to measure the voltage difference between the two layers, and a sealing ring for sealing the first and second catalytic layers. The central opening of the first base is sealed with a reference gas with a known concentration, and the central opening of the second base is communicated with the cabin environment to be detected. The hydrogen concentration detection module is symmetrical with the oxygen concentration detection module. The central opening of the first base of the oxygen concentration detection module is sealed with oxygen with a reference concentration, and the central opening of the second base of the oxygen concentration detection module is communicated with the oxygen side cabin environment. The central opening of the first base of the hydrogen concentration detection module is sealed with hydrogen with a reference concentration, and the central opening of the second base of the hydrogen concentration detection module is communicated with the hydrogen side cabin environment.

2. The oxyhydrogen regenerative fuel cell system according to claim 1, characterized by, The cabin walls of the hydrogen side cabin and the oxygen side cabin are made of high-thermal-conductivity light materials, and heat dissipation fans are arranged in the two cabins to accelerate the convection of the gases in the cabins and the heat exchange between the cabin walls and the environment. The safety control module is a central controller receiving signals from pressure sensors and temperature sensors in the hydrogen side cabin and the oxygen side cabin, output voltages of the hydrogen / oxygen concentration detection modules, a system loop ammeter and a voltmeter, and outputting control signals to a water pump, hydrogen / oxygen supply electromagnetic valves, water path control electromagnetic valves, safety exhaust electromagnetic valves and heat dissipation fans of the hydrogen side and the oxygen side. The safety control module executes the following control method: ​ ​ ​ 3. The oxyhydrogen regenerative fuel cell system according to claim 2, wherein, ​ ​ ​ 4. The oxyhydrogen regenerative fuel cell system according to claim 1, wherein, ​ 5. The oxyhydrogen regenerative fuel cell system according to claim 1, wherein, ​ 6. The oxyhydrogen regenerative fuel cell system according to claim 5, wherein, ​ When the system is started, the initial voltage value V of the hydrogen-oxygen concentration detection module is read O2, initial With V H2, initial ; Real-time acquisition of calibrated concentration voltage value V O2, correct With V H2, correct And compare with the preset threshold value; Real-time monitoring of the temperature T of the oxygen side chamber and the hydrogen side chamber O2 With T H2 And the preset reference temperature T O2,ref With T H2,ref Comparison; When V O2, correct or V H2, correct Transfinite, or T O2 or T H2 When the concentration control and temperature control required fan speed conflict, take the larger value to run; wherein, V O2, correct = V O2 - V O2, initial ; ; V O2 is the output voltage of the oxygen concentration monitoring module in the oxygen side cabin, T O2 is the temperature near the stack in the oxygen side cabin, P O2,ref is the concentration of the sealed oxygen in the oxygen concentration monitoring module, P O2,env is the measured oxygen concentration in the oxygen side cabin; V H2, correct =V H2 -V H2, initial ; ;V H2 V is the output voltage of the hydrogen concentration monitoring module in the hydrogen side cabin, T H2 T is the temperature near the stack in the hydrogen side cabin, P H2,ref P is the concentration of the sealed hydrogen in the hydrogen concentration monitoring device, P H2,env P is the measured hydrogen concentration in the hydrogen side cabin.

7. The oxyhydrogen regenerative fuel cell system according to claim 1, wherein The hydrogen tank and the oxygen tank are respectively located on two sides of the renewable fuel cell stack, and the hydrogen pipeline and the oxygen pipeline are physically isolated by a light material plate.

8. The oxyhydrogen regenerative fuel cell system according to claim 1, wherein, The hydrogen-oxygen concentration detection module is installed at the connection between the hydrogen pipeline and the renewable fuel cell stack and the connection between the oxygen pipeline and the renewable fuel cell stack.

9. The oxyhydrogen regenerative fuel cell system according to claim 1, wherein, The shell of the safety control module is integrated with the shell of the system into an integrated shell, an external power supply for supplying power to the safety control module is arranged outside the integrated shell; the external power supply has a detachable shell, and the internal space of the detachable shell is isolated from the gas chamber.

10. The oxyhydrogen regenerative fuel cell system according to claim 1, wherein, The system further comprises an external power input module and a load module, so that the system can be switched between the water electrolysis hydrogen production mode and the fuel cell power generation mode.

Images