Metal oxygen fuel cell control device and control method based on oxygen generation

Abstract

The present invention discloses a metal oxygen fuel cell control device and control method based on oxygen generation, wherein the device includes: an oxygen online generation and supply system, which is used to control the oxygen generation reaction of the reaction catalyst and the reactant in the reaction chamber, and supply the oxygen generated by the oxygen generation reaction to the fuel cell; an oxygen flow control system, which is used to obtain the oxygen demand of the fuel cell, and determine the reactant flow entering the reaction chamber according to the oxygen demand; an air pressure stabilization system, which is used to detect the air pressure value of the reaction chamber, and adjust the reactant flow entering the reaction chamber according to the air pressure value of the reaction chamber. The device can realize the online supply of oxygen and meet the oxygen supply demand of metal oxygen fuel cells in special scenarios such as closed and low noise.

Description

Technical Field

[0001] The present invention relates to the technical field of metal oxygen fuel cells, and in particular to a metal oxygen fuel cell control device and a control method based on oxygen generation. Background Art

[0002] Metal oxygen fuel cell is a chemical power source that directly converts the chemical energy of metal into electrical energy. It has the advantages of high energy conversion efficiency, low cost, convenient fuel storage and portability, safety and pollution-free. Metal oxygen fuel cell has good application prospects in military power supply, power supply for closed environment, backup power supply and other fields.

[0003] Specifically, the working principle of the metal oxygen fuel cell is that the metal undergoes an electrochemical oxidation reaction in the electrolyte in the anode chamber to generate metal oxides; oxygen undergoes an electrochemical reduction reaction in the three-phase reaction zone of the cathode electrode to generate hydroxide ions. The electrode reaction is as follows (the metal M can be a metal element such as Li, Mg, Al, Zn, etc.):

[0004] Anode reaction: 2M+2nOH – →M2O n +nH2O+2ne –

[0005] Cathode reaction: O2+2H2O+4e – →4OH –

[0006] Overall reaction: 4M+nO2→2M2O n

[0007] Oxygen is the reactant of the cathode reaction of metal oxygen fuel cells. There are two ways to supply oxygen to metal oxygen fuel cells. One is to directly take it from the air, also known as metal air fuel cells. The advantages of this supply method are convenient material acquisition, low cost, and suitable for occasions where power density requirements are not high. The disadvantage is that the battery works in an open environment, and the alkaline electrolyte will react with carbon dioxide in the air to form carbonate crystals, which will reduce the performance of the battery. The second method is to introduce pure oxygen into the battery. This method can improve the power density of the battery. Its disadvantages are that, first, the battery stack requires special oxygen storage devices such as oxygen tanks, and the weight and volume of the system increase, so the power efficiency of the entire battery stack system is not significant enough; secondly, the introduction of oxygen tanks also poses challenges to the safety of the system. Summary of the invention

[0008] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0009] To this end, an object of the present invention is to propose a metal oxygen fuel cell control device based on oxygen generation, which can realize online supply of oxygen and meet the oxygen supply demand of metal oxygen fuel cells in special scenarios such as closed and low noise.

[0010] Another object of the present invention is to provide a metal oxygen fuel cell control method based on oxygen generation.

[0011] To achieve the above objectives, an embodiment of the present invention provides a metal oxygen fuel cell control device based on oxygen generation, comprising:

[0012] An oxygen online generation and supply system is used to control the oxygen generation reaction between the reaction catalyst and the reactant in the reaction chamber, and supply oxygen generated by the oxygen generation reaction to the fuel cell stack;

[0013] An oxygen flow control system, used to obtain the oxygen demand of the fuel cell stack and determine the reactant flow entering the reaction chamber according to the oxygen demand;

[0014] The air pressure stabilization system is used to detect the air pressure value of the reaction chamber and adjust the flow rate of the reactant entering the reaction chamber according to the air pressure value of the reaction chamber.

[0015] The metal oxygen fuel cell control device based on oxygen generation in the embodiment of the present invention calculates the oxygen demand of the fuel cell stack through an electronic control unit, determines the flow rate of the reactant according to the oxygen demand, generates oxygen through the reaction of the reactant and the reaction catalyst in the reaction chamber, supplies the oxygen to the fuel cell stack, detects the pressure of the reaction chamber through a pressure sensor, stabilizes the gas pressure in the reaction chamber by controlling the rate of the oxygen generation reaction, and can realize online supply of oxygen to meet the oxygen supply requirements of metal oxygen fuel cells in special scenarios such as closed and low-noise.

[0016] In addition, the metal oxygen fuel cell control device based on oxygen generation according to the above embodiment of the present invention may also have the following additional technical features:

[0017] Further, in one embodiment of the present invention, the oxygen online generation and supply system comprises: a reactant storage tank, the reaction chamber, a flow valve, an oxygen supply pipe and an oxygen reflux pipe;

[0018] The reactant storage tank and the reaction chamber are connected via the flow valve;

[0019] The reactant storage tank is used to store reactants;

[0020] The reaction chamber is used to store a reaction catalyst, and the reaction catalyst and the reactant undergo an oxygen generation reaction in the reaction chamber to generate oxygen;

[0021] One end of the oxygen supply pipe is connected to the fuel cell stack, and the other end is connected to the reaction chamber. One end of the oxygen reflux pipe is connected to the fuel cell stack, and the other end is connected to the reaction chamber. The oxygen generated in the reaction chamber is supplied to the fuel cell stack through the oxygen supply pipe for electrochemical reaction inside the fuel cell stack. The oxygen in the fuel cell stack that has not undergone electrochemical reaction inside the fuel cell stack returns to the reaction chamber through the oxygen reflux pipe.

[0022] Further, in one embodiment of the present invention, the oxygen flow control system comprises: an electronic control unit;

[0023] The electronic control unit is connected to the flow valve, and the electronic control unit includes a driving module;

[0024] The control unit is used to collect the stack power signal of the fuel cell, calculate the oxygen demand according to the stack power signal, calculate the reactant flow entering the reaction chamber according to the oxygen demand, and adjust the opening of the flow valve through the drive module of the control unit to adjust the reactant flow entering the reaction chamber.

[0025] Further, in one embodiment of the present invention, the air pressure stabilization system comprises: a pressure sensor;

[0026] The pressure sensor is installed in the reaction chamber, connected to the electronic control unit, and is used to detect the air pressure value of the reaction chamber.

[0027] Further, in one embodiment of the present invention, adjusting the reactant flow rate of the reaction chamber according to the gas pressure value of the reaction chamber comprises:

[0028] When the pressure sensor detects that the air pressure value of the reaction chamber is greater than a preset air pressure value, the electronic control unit adjusts the opening of the flow valve to reduce the flow of reactants entering the reaction chamber, thereby reducing the oxygen generation rate of the reaction chamber to stabilize the air pressure value of the reaction chamber.

[0029] To achieve the above object, another embodiment of the present invention provides a metal oxygen fuel cell control method based on oxygen generation, comprising:

[0030] S1, collecting a stack power signal of a fuel cell, calculating the oxygen demand according to the stack power signal, and calculating a reactant flow rate according to the oxygen demand;

[0031] S2, controlling the opening of the flow valve so that the reactant at the reactant flow rate enters the reaction chamber to react with the reaction catalyst in the reaction chamber to generate oxygen;

[0032] S3, transporting the oxygen in the reaction chamber between the reaction chamber and the fuel cell stack through a bidirectional pipeline;

[0033] S4, detecting the air pressure value of the reaction chamber by means of a pressure sensor, and when the air pressure value of the reaction chamber is greater than a preset air pressure value, adjusting the opening of the flow valve to reduce the flow of reactants entering the reaction chamber, thereby reducing the oxygen generation rate of the reaction chamber and stabilizing the air pressure value of the reaction chamber.

[0034] The metal oxygen fuel cell control method based on oxygen generation of the embodiment of the present invention calculates the oxygen demand of the fuel cell stack through an electronic control unit, determines the flow rate of the reactant according to the oxygen demand, generates oxygen through the reaction of the reactant and the reaction catalyst in the reaction chamber, supplies the oxygen to the fuel cell stack, and detects the pressure of the reaction chamber through a pressure sensor. The gas pressure in the reaction chamber is stabilized by controlling the rate of the oxygen generation reaction. The device can realize online supply of oxygen and meet the oxygen supply requirements of metal oxygen fuel cells in special scenarios such as closed and low-noise.

[0035] In addition, the metal oxygen fuel cell control method based on oxygen generation according to the above embodiment of the present invention may also have the following additional technical features:

[0036] Furthermore, in one embodiment of the present invention, the S1 further includes: collecting a stack power signal of the stack through an electronic control unit.

[0037] Furthermore, in one embodiment of the present invention, the S2 further comprises:

[0038] By opening the flow valve, the reactant in the reactant storage tank enters the reaction chamber and reacts with the reaction catalyst in the reaction chamber, wherein the reactant is hydrogen peroxide or water, and the reaction catalyst is manganese dioxide or sodium peroxide.

[0039] Further, in one embodiment of the present invention, the S3 includes:

[0040] The oxygen in the reaction chamber is supplied to the fuel cell stack through the oxygen supply pipe for electrochemical reaction inside the fuel cell stack, and the oxygen in the fuel cell stack that has not undergone electrochemical reaction inside the fuel cell stack returns to the reaction chamber through the oxygen reflux pipe.

[0041] Furthermore, in one embodiment of the present invention, the step S4 further comprises:

[0042] When it is detected that the air pressure value of the reaction chamber is greater than the preset air pressure value, the opening of the flow valve is controlled by the electronic control unit.

[0043] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0045] Figure 1 A schematic diagram of the structure of a metal oxygen fuel cell control device based on oxygen generation according to an embodiment of the present invention;

[0046] Figure 2 It is a flowchart of a method for online oxygen supply control of a metal oxygen fuel cell according to one embodiment of the present invention;

[0047] Figure 3 The figure is a flow chart of metal oxygen fuel cell regulation based on oxygen generation according to one embodiment of the present invention. DETAILED DESCRIPTION

[0048] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0049] The following describes a metal oxygen fuel cell control device and a control method based on oxygen generation according to an embodiment of the present invention with reference to the accompanying drawings.

[0050] First, a metal oxygen fuel cell control device based on oxygen generation according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0051] Figure 1 Schematic diagram of the structure of a metal oxygen fuel cell control device based on oxygen generation according to an embodiment of the present invention.

[0052] like Figure 1 As shown, the metal oxygen fuel cell control device based on oxygen generation includes: an oxygen online generation and supply system, an oxygen flow control system, and an air pressure stabilization system.

[0053] Among them, the oxygen online generation and supply system is used to control the oxygen generation reaction occurring between the reaction catalyst and the reactant in the reaction chamber, and supply the oxygen generated by the oxygen generation reaction to the fuel cell stack.

[0054] The oxygen flow control system is used to obtain the oxygen demand of the fuel cell stack and determine the reactant flow entering the reaction chamber based on the oxygen demand.

[0055] The gas pressure stabilization system is used to detect the gas pressure value of the reaction chamber and adjust the flow rate of the reactant entering the reaction chamber according to the gas pressure value of the reaction chamber.

[0056] like Figure 1As shown, the oxygen online generation and supply system includes: a reactant storage tank 1, a reaction chamber 2, a flow valve 3, an oxygen supply pipe 4 and an oxygen reflux pipe 5.

[0057] The reactant storage tank 1 and the reaction chamber 2 are connected via a flow valve 3 .

[0058] The reactant storage tank 1 is used to store reactants.

[0059] The reaction chamber 2 is used to store the reaction catalyst. The reaction catalyst and the reactant undergo an oxygen generation reaction in the reaction chamber 2 to generate oxygen.

[0060] One end of the oxygen supply pipe 4 is connected to the fuel cell stack, and the other end is connected to the reaction chamber 2. One end of the oxygen reflux pipe 5 is connected to the fuel cell stack, and the other end is connected to the reaction chamber 2. The oxygen generated in the reaction chamber 2 is supplied to the fuel cell stack through the oxygen supply pipe 4 for electrochemical reaction inside the fuel cell stack. The oxygen in the fuel cell stack that has not undergone electrochemical reaction inside the fuel cell stack returns to the reaction chamber 2 through the oxygen reflux pipe 5.

[0061] Specifically, the online oxygen generation and supply system starts and stops the oxygen generation reaction occurring in the reaction chamber in real time, and supplies a certain flow of oxygen to the fuel cell stack.

[0062] It is understandable that the reactant storage tank 1 stores the reactant, and the reaction chamber 2 stores the reaction catalyst. The reactant may be a hydrogen peroxide solution, and the corresponding fixed reaction catalyst may be manganese dioxide, etc.; the reactant may also be water, and the corresponding solid reactant may be sodium (potassium) peroxide, etc. In particular, when water and sodium (potassium) peroxide are used as the oxygen-producing reaction pair, the reaction product sodium (potassium) hydroxide solution may be supplied to the stack as the electrolyte of the stack.

[0063] The reactant storage tank 1 is connected to the reaction chamber 2 through an adjustable flow valve 3. When the stack is working, the flow valve 3 is opened, and the reactant enters the reaction chamber 2 through the flow valve 3 at a certain flow rate. In the reaction chamber 2, the reactant and the reactant react chemically in the reaction chamber 2 to produce oxygen, which is supplied to the stack through the oxygen supply pipe 4. The oxygen participates in the electrochemical reaction inside the stack, and the unreacted oxygen returns to the reaction chamber 2 through the oxygen reflux pipe 5.

[0064] like Figure 1 As shown, the oxygen flow control system includes: an electronic control unit 6.

[0065] The electronic control unit 6 is connected to the flow valve 3 , and the electronic control unit includes a driving module.

[0066] The control unit 6 is used to collect the stack power signal of the fuel cell, calculate the oxygen demand according to the stack power signal, calculate the reactant flow entering the reaction chamber according to the oxygen demand, and adjust the opening of the flow valve 3 through the driving module of the control unit 6 to adjust the reactant flow entering the reaction chamber.

[0067] Specifically, the electronic control unit 6 collects the current stack power signal and calculates the oxygen demand at the current power, and determines the reactant flow entering the reaction chamber 2 in combination with the structure of the online oxygen supply system, the excess coefficient, etc. The drive module of the electronic control unit 6 adjusts the reactant flow entering the reaction chamber 2 based on the calculated reactant flow and the opening of the flow valve 3, thereby realizing the control of the oxygen flow.

[0068] like Figure 1 As shown, the air pressure stabilization system includes: a pressure sensor 7.

[0069] The pressure sensor 7 is installed in the reaction chamber 2 and connected to the electronic control unit 6 for detecting the air pressure value of the reaction chamber 2 .

[0070] Furthermore, when the pressure sensor 7 detects that the air pressure value of the reaction chamber 2 is greater than the preset air pressure value, the electronic control unit 6 adjusts the opening of the flow valve 3 to reduce the flow of the reactant entering the reaction chamber 2, thereby reducing the oxygen generation rate of the reaction chamber 2 to stabilize the air pressure value of the reaction chamber 2.

[0071] It can be understood that the pressure sensor 7 is installed in the reaction chamber 2 to monitor the gas pressure in the reaction chamber 2 in real time. When the detected air pressure value exceeds the given preset air pressure value, the reactant flow rate is reduced through the oxygen flow control system to reduce the oxygen generation rate in the reaction chamber 2, so that the air pressure in the reaction chamber 2 returns to stability and is maintained within a certain range.

[0072] like Figure 2 As shown, the control program flowchart of the metal oxygen fuel cell oxygen online generation control system is shown, and the selected oxygen production method is hydrogen peroxide solution and manganese dioxide catalyst. After the stack is started, the electronic control unit 6 detects the current stack power demand signal and calculates the reactant flow rate as:

[0073] Q0=0.01nIλ / ρ

[0074] Where Q0 is the flow rate of the reactant hydrogen peroxide, mL / min; n is the number of cells; I is the current at the current required power, A; λ is the oxygen excess coefficient, that is, the ratio of the actual oxygen supply to the theoretical oxygen demand; ρ is the density of the reactant hydrogen peroxide, g / mL.

[0075] After calculating the reactant flow rate Q0, the driving module adjusts the opening of the flow valve 3 so that the reactant enters the reaction chamber 2 according to the flow rate Q0. In the reaction chamber 2, the hydrogen peroxide solution generates oxygen under the catalytic action of the catalyst manganese dioxide. The generated oxygen is supplied to the fuel cell stack, and the unreacted oxygen flows back to the reaction chamber 2. In the system feedback link, the pressure sensor 7 in the reaction chamber 2 monitors the air pressure value in the reaction chamber 2 in real time. When the detected air pressure value P is greater than the set pressure threshold (such as 1.1 times the initial air pressure value P0), the flow rate Q0 is reduced to 90% of the initial value, thereby maintaining the pressure in the reaction chamber 2 stable.

[0076] Among them, specific parameters such as the oxygen excess coefficient λ, the pressure threshold of the feedback link, and the reactant flow adjustment amount can be calibrated according to actual needs.

[0077] According to the metal oxygen fuel cell control device based on oxygen generation proposed in the embodiment of the present invention, the oxygen demand of the fuel cell stack is calculated by an electronic control unit, the flow rate of the reactant is determined according to the oxygen demand, the reactant and the reaction catalyst react in the reaction chamber to generate oxygen, the oxygen is supplied to the fuel cell stack, and the pressure of the reaction chamber is detected by a pressure sensor. The gas pressure in the reaction chamber is stabilized by controlling the rate of the oxygen generation reaction. The device can realize online supply of oxygen and meet the oxygen supply requirements of metal oxygen fuel cells in special scenarios such as closed and low-noise.

[0078] Next, the metal oxygen fuel cell control method based on oxygen generation according to an embodiment of the present invention is described with reference to the accompanying drawings.

[0079] Figure 3 The figure is a flow chart of a metal oxygen fuel cell control method based on oxygen generation according to an embodiment of the present invention.

[0080] like Figure 3 As shown, the metal oxygen fuel cell control method based on oxygen generation includes:

[0081] Step S1, collecting a stack power signal of the stack, calculating an oxygen demand according to the stack power signal, and calculating a reactant flow rate according to the oxygen demand.

[0082] Among them, the stack power signal of the stack is collected through the electronic control unit

[0083] Step S2, controlling the opening of the flow valve to allow the reactant of the reactant flow rate to enter the reaction chamber to react with the reaction catalyst in the reaction chamber to generate oxygen.

[0084] Specifically, by opening the flow valve, the reactant in the reactant storage tank enters the reaction chamber and reacts with the reaction catalyst in the reaction chamber, wherein the reactant is hydrogen peroxide or water, and the reaction catalyst is manganese dioxide or sodium peroxide.

[0085] Step S3, transporting the oxygen in the reaction chamber between the reaction chamber and the fuel cell stack through a bidirectional pipeline.

[0086] Specifically, oxygen in the reaction chamber is supplied to the fuel cell stack through the oxygen supply pipe for electrochemical reaction inside the fuel cell stack, and oxygen in the fuel cell stack that has not undergone electrochemical reaction inside the fuel cell stack returns to the reaction chamber through the oxygen reflux pipe.

[0087] Step S4, detecting the air pressure value of the reaction chamber by means of a pressure sensor, and when the air pressure value of the reaction chamber is greater than a preset air pressure value, adjusting the opening of the flow valve to reduce the flow of reactants entering the reaction chamber, thereby reducing the oxygen generation rate of the reaction chamber and stabilizing the air pressure value of the reaction chamber.

[0088] Specifically, when it is detected that the air pressure value of the reaction chamber is greater than the preset air pressure value, the opening of the flow valve is controlled by the electronic control unit.

[0089] It should be noted that the aforementioned explanation of the embodiment of the metal oxygen fuel cell control device based on oxygen generation is also applicable to the method of this embodiment and will not be repeated here.

[0090] According to the metal oxygen fuel cell control method based on oxygen generation proposed in an embodiment of the present invention, the oxygen demand of the fuel cell stack is calculated by an electronic control unit, the flow rate of the reactant is determined according to the oxygen demand, the reactant and the reaction catalyst react in the reaction chamber to generate oxygen, the oxygen is supplied to the fuel cell stack, and the pressure of the reaction chamber is detected by a pressure sensor. The gas pressure in the reaction chamber is stabilized by controlling the rate of the oxygen generation reaction. The device can realize online supply of oxygen and meet the oxygen supply requirements of metal oxygen fuel cells in special scenarios such as closed and low-noise.

[0091] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0093] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A metal oxygen fuel cell control device based on oxygen generation, characterized in that: include: An oxygen online generation and supply system is used to control the oxygen generation reaction between the reaction catalyst and the reactant in the reaction chamber, and supply oxygen generated by the oxygen generation reaction to the fuel cell stack; An oxygen flow control system, used to obtain the oxygen demand of the fuel cell stack and determine the reactant flow entering the reaction chamber according to the oxygen demand; An air pressure stabilization system, used to detect the air pressure value of the reaction chamber and adjust the flow rate of the reactant entering the reaction chamber according to the air pressure value of the reaction chamber; The oxygen online generation and supply system comprises: a reactant storage box, the reaction chamber, a flow valve, an oxygen supply pipe and an oxygen reflux pipe; The reactant storage tank and the reaction chamber are connected via the flow valve; The reactant storage tank is used to store reactants; The reaction chamber is used to store a reaction catalyst, and the reaction catalyst and the reactant undergo an oxygen generation reaction in the reaction chamber to generate oxygen, wherein the reactant includes water, the corresponding reaction catalyst includes sodium peroxide, and the reaction product, sodium hydroxide solution, is supplied to the stack as an electrolyte of the stack; One end of the oxygen supply pipe is connected to the battery stack, and the other end is connected to the reaction chamber. One end of the oxygen reflux pipe is connected to the battery stack, and the other end is connected to the reaction chamber. The oxygen generated in the reaction chamber is supplied to the battery stack through the oxygen supply pipe for electrochemical reaction inside the battery stack. The oxygen in the battery stack that has not undergone electrochemical reaction inside the battery stack is returned to the reaction chamber through the oxygen reflux pipe. Electronic control unit; The electronic control unit is connected to the flow valve, and the electronic control unit includes a driving module; The electronic control unit is used to collect the stack power signal of the battery stack, calculate the oxygen demand according to the stack power signal, calculate the reactant flow entering the reaction chamber according to the oxygen demand, and adjust the opening of the flow valve through the driving module of the electronic control unit to adjust the reactant flow entering the reaction chamber, wherein the electronic control unit detects the current stack power demand signal and calculates the reactant flow as: Q0=0.01nIλ / ρ Where Q0 is the flow rate of the reactant hydrogen peroxide; n is the number of cells; I is the current at the current required power; λ is the oxygen excess coefficient, that is, the ratio of the actual oxygen supply to the theoretical oxygen demand; ρ is the density of the reactant hydrogen peroxide.

2. The device according to claim 1, characterized in that The air pressure stabilization system comprises: a pressure sensor; The pressure sensor is installed in the reaction chamber, connected to the electronic control unit, and is used to detect the air pressure value of the reaction chamber.

3. The device according to claim 2, characterized in that The step of adjusting the reactant flow rate of the reaction chamber according to the gas pressure value of the reaction chamber comprises: When the pressure sensor detects that the air pressure value of the reaction chamber is greater than a preset air pressure value, the electronic control unit adjusts the opening of the flow valve to reduce the flow of reactants entering the reaction chamber, thereby reducing the oxygen generation rate of the reaction chamber to stabilize the air pressure value of the reaction chamber.

4. A metal oxygen fuel cell control method based on oxygen generation, characterized in that: The following steps are involved: S1, collecting a stack power signal of a fuel cell, calculating the oxygen demand according to the stack power signal, and calculating a reactant flow rate according to the oxygen demand; S2, controlling the opening of the flow valve so that the reactant at the reactant flow rate enters the reaction chamber to react with the reaction catalyst in the reaction chamber to generate oxygen; S3, transporting the oxygen in the reaction chamber between the reaction chamber and the fuel cell stack through a bidirectional pipeline; S4, detecting the air pressure value of the reaction chamber by means of a pressure sensor, and when the air pressure value of the reaction chamber is greater than a preset air pressure value, adjusting the opening of the flow valve to reduce the flow of the reactant entering the reaction chamber, thereby reducing the oxygen generation rate of the reaction chamber and stabilizing the air pressure value of the reaction chamber; Said S1 further comprises: The stack power signal of the stack is collected by the electronic control unit, the oxygen demand is calculated according to the stack power signal, the reactant flow entering the reaction chamber is calculated according to the oxygen demand, and the opening of the flow valve is adjusted by the driving module of the electronic control unit to adjust the reactant flow entering the reaction chamber, wherein the electronic control unit detects the current stack power demand signal and calculates the reactant flow as: Q0=0.01nIλ / ρ In the formula, Q0 is the flow rate of the reactant hydrogen peroxide; n is the number of cells; I is the current under the current required power; λ is the oxygen excess coefficient, that is, the ratio of the actual oxygen supply to the theoretical oxygen demand; ρ is the density of the reactant hydrogen peroxide; Said S2 further comprises: By opening the flow valve, the reactant in the reactant storage tank enters the reaction chamber and reacts with the reaction catalyst in the reaction chamber, wherein the reactant is water, the reaction catalyst is sodium peroxide, and the reaction product, sodium hydroxide solution, is supplied to the battery stack as the electrolyte of the battery stack.

5. The method according to claim 4, characterized in that The S3 includes: The oxygen in the reaction chamber is supplied to the fuel cell stack through the oxygen supply pipe for electrochemical reaction inside the fuel cell stack, and the oxygen in the fuel cell stack that has not undergone electrochemical reaction inside the fuel cell stack returns to the reaction chamber through the oxygen reflux pipe.

6. The method according to claim 4, characterized in that Said S4 further comprises: When it is detected that the air pressure value of the reaction chamber is greater than the preset air pressure value, the opening of the flow valve is controlled by an electronic control unit.

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