CN115172829A - Photovoltaic power generation hydrogen fuel cell device and control method - Google Patents

Abstract

The invention discloses a photovoltaic power generation hydrogen fuel cell device and a control method thereof, and the device comprises a photovoltaic power generation module, a power management module, a water electrolysis module, a water storage module, a hydrogen storage module and a galvanic pile module, wherein an isolation structure is arranged in the water storage module to separate the interior of the water storage module into a first water storage cavity and a second water storage cavity, the isolation structure can allow water to pass through and can isolate oxygen, hydrogen and the like, the water storage module is provided with a first water outlet, a first backflow port, an oxygen output port, a second water outlet, a second backflow port and a hydrogen output port, which are all communicated with the first water storage cavity, the second water outlet is communicated with a negative output port, a membrane electrode assembly is arranged in the galvanic pile module to separate the interior of the galvanic pile module into a first reaction cavity and a second reaction cavity, a third water outlet of the first reaction cavity is communicated with the first backflow port, and a fourth water outlet of the second reaction cavity is communicated with the second backflow port.

Description

A photovoltaic power generation hydrogen fuel cell device and control method

technical field

The invention relates to the technical field of new energy, in particular to a photovoltaic power generation hydrogen fuel cell device and a control method.

Background technique

As one of the new energy sources, solar energy is widely used.

The existing utilization of solar energy is to obtain solar energy through photovoltaic panels, store it in the battery after voltage stabilization, and then supply power to the load from the battery. , lithium batteries have higher performance and life, but higher prices, lead-acid batteries are lower in price, but their weight, life and performance are inferior to lithium batteries. However, no matter which type of battery is selected, since the battery is fully relied on to bear the pressure of charging and discharging during use, it is necessary to replace the battery every year to obtain better energy storage and discharge performance, which will result in higher maintenance costs and aggravation. The increasingly severe situation of battery recycling.

Later, hydrogen fuel cells gradually appeared in the choice of users, but if the structure of hydrogen fuel cells is not reasonably configured, it is easy to be dangerous. Therefore, hydrogen fuel cells have not been widely used.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a photovoltaic power generation hydrogen fuel cell device and a control method, which are stable in operation, green and clean, and improve safety in use.

A photovoltaic power generation hydrogen fuel cell device according to the first aspect of the present invention includes: a photovoltaic power generation module; a power management module, which is electrically connected to the photovoltaic power generation module; and a water electrolysis module, which is provided with an electrolysis A cavity, an electrolysis assembly, and a positive output port and a negative electrode output port both communicated with the electrolysis cavity, the electrolysis assembly is located in the electrolysis cavity, and the power management module is connected to the electrolysis assembly so as to be able to be converted by a photovoltaic power generation module The electric energy of the water storage module is used to power the electrolysis assembly; the water storage module is provided with an isolation structure to separate the water storage module into a first water storage cavity and a second water storage cavity, and the isolation structure can allow water to pass through and can isolate oxygen and hydrogen , one or more of hydroxide ions, hydrogen peroxide, oxygen-containing free radicals, hydrogen ions and metal ions, and the water storage module is provided with a first water outlet that communicates with the first water storage cavity, The first return port, the oxygen output port and the second water outlet, the second return port and the hydrogen output port are all communicated with the second water storage cavity, and the first water outlet is connected with the positive electrode output port, so The second water outlet is connected with the negative electrode output port; the hydrogen storage module is provided with a hydrogen storage cavity, a hydrogen inlet and a hydrogen outlet communicated with the hydrogen storage cavity, and the hydrogen inlet is connected to the hydrogen storage cavity. The hydrogen output port is connected; the stack module is provided with a membrane electrode assembly to separate the stack module into a first reaction chamber and a second reaction chamber, the membrane electrode assembly and the power management module Electrically connected, the stack module is provided with a first air inlet and a third water outlet that are both communicated with the first reaction chamber, and a second air inlet and a fourth water outlet that are both communicated with the second reaction chamber Water outlet, the first air inlet is used to input oxygen or air, the second air inlet is connected with the hydrogen outlet, the third water outlet is connected with the first return port, so The fourth water outlet is connected to the second return port.

A photovoltaic power generation hydrogen fuel cell device according to an embodiment of the present invention has at least the following beneficial effects:

In the photovoltaic power generation hydrogen fuel cell device of the present invention, the photovoltaic power generation module can convert solar energy into electric energy, which is distributed through the power management module, and the electric energy can supply power for the electrolysis components. Water is stored in the first water storage chamber and the second water storage chamber. , the first water storage chamber and the second water storage chamber provide water to the electrolysis chamber through the first water outlet and the second water outlet correspondingly, and the electrolysis assembly electrolyzes the water in the electrolysis chamber into hydrogen and oxygen, and is subject to the voltage applied by the electrolysis assembly. Oxygen will accumulate at the positive electrode of the electrolysis component, and hydrogen will accumulate at the negative electrode of the electrolysis component. Oxygen enters the first water storage chamber from the positive output port in water, and hydrogen enters the second water storage chamber from the negative electrode output port in water. Due to the isolation structure in the water storage module, oxygen will not enter the second water storage cavity, and hydrogen will not enter the first water storage cavity, and oxygen will not be mixed with hydrogen to cause the danger of burning. Allow water to pass through, keep the water pressure in the first water storage chamber and the second water storage chamber balanced, then oxygen can be output from the oxygen output port, and hydrogen can be output from the hydrogen output port to the hydrogen storage module for storage, thus storing The energy converted from light energy, and when the load needs electricity, the hydrogen storage module outputs hydrogen to the stack module, and at the same time, the first air inlet inputs oxygen or air, and the hydrogen and oxygen react in the stack module. The electrode assembly generates electricity and outputs it to the power management module. The power management module then outputs power to supply power to the load. The oxygen in the first reaction chamber and the hydrogen in the second reaction chamber will not leak from each other, and the hydrogen and oxygen react to produce water. The water in the first reaction chamber can be returned from the first return port to the first water storage chamber, the water in the second reaction chamber can be returned from the second return port to the second water storage chamber, and the returned water may carry hydrogen or Oxygen, but with the above structure, hydrogen and oxygen will not be mixed, the design runs stably, is green and clean, and improves the safety performance.

According to some embodiments of the present invention, the water storage module is located above the water electrolysis module, the first water outlet is located at the bottom of the first water storage cavity, and the second water outlet is located at the second water outlet Bottom of the water storage chamber.

According to some embodiments of the present invention, a circulation module is further included, the circulation module includes a first water vapor separator, a first booster pump, a first check valve and a proportional valve, the proportional valve includes a first input end , a second input end and a mixed output end, the first water vapor separator includes an input end, a water output end and a steam output end, and the input end of the first water vapor separator is connected to the fourth water outlet, so The water output end of the first water vapor separator is connected to the second return port, the gas output end of the first water vapor separator is connected to the input end of the first booster pump, and the first booster pump is connected. The output end of the pressure pump is connected with the input end of the first check valve, the output end of the first check valve is connected with the first input end of the proportional valve, the second input end of the proportional valve is connected The terminal is connected to the hydrogen outlet, and the mixed output end of the proportional valve is connected to the second air inlet.

According to some embodiments of the present invention, a hydrogen water transmission module is further included, the hydrogen water transmission module includes a second water vapor separator, a second booster pump and a second check valve, and the second water vapor separator includes The input end, the water output end and the steam output end, the input end of the second water vapor separator is connected with the hydrogen output port, and the steam output end of the second water vapor separator is connected with the output end of the second booster pump. The input end is connected, the output end of the second booster pump is connected with the input end of the second check valve, the output end of the second check valve is connected with the hydrogen inlet, the The water output end of the second water vapor separator is respectively connected with the water output end of the first water vapor separator and the second return port.

According to some embodiments of the present invention, the proportional valve is provided with a flow meter, and the flow meter is used to detect the hydrogen input amount at the second input end of the proportional valve, and the flow meter is connected to the power management module. electrical connection.

According to some embodiments of the present invention, an oxygen-water transmission module is further included, the oxygen-water transmission module includes a third water vapor separator and a fourth water vapor separator, the third water vapor separator and the fourth water vapor separator Each of the separators includes an input end, a water output end and a steam output end. The input end of the third water vapor separator is connected to the third water outlet, and the input end of the fourth water vapor separator is connected to the oxygen output port. When connected, the water output end of the third water vapor separator is respectively connected with the water output end of the fourth water vapor separator and the first return port.

According to some embodiments of the present invention, it further includes an air supply pump and a filter, the air supply pump is used to connect with an air or oxygen source, the air supply pump is connected to the input end of the filter, and the output of the filter The end is connected with the first air inlet.

According to some embodiments of the present invention, the power management module includes a power control unit, a first rectifier switch unit, and a second rectifier switch unit. The power control unit includes a photovoltaic input end, an electrolysis output end, a stack input end, and a power supply output end, the photovoltaic input end of the power supply control unit is electrically connected to the photovoltaic power generation module, the electrolysis output end of the power supply control unit is connected to the input end of the first rectifier switch unit, the first rectifier The output end of the switch unit is electrically connected to the electrolysis assembly, the membrane electrode assembly is electrically connected to the input end of the second rectifier switch unit, and the output end of the second rectifier switch unit is electrically connected to the power supply control unit. The stack input terminal is electrically connected, and the power supply output terminal of the power control unit is used for electrical connection with the load.

According to some embodiments of the present invention, the power management module includes a battery and a charge and discharge switch unit, one end of the charge and discharge switch unit is connected to the battery, the power control unit further includes a battery connection end, the power source The battery connection end of the control unit is connected to the other end of the charge and discharge switch unit.

The control method according to the embodiment of the second aspect of the present invention is applied to a photovoltaic power generation hydrogen fuel cell device disclosed in any of the above embodiments, and the photovoltaic power generation hydrogen fuel cell device further includes a stack output detection unit and a load power detection unit and a photovoltaic input detection unit, the power control unit is respectively connected to the load voltage detection unit and the photovoltaic input detection unit, and the control method includes: acquiring the load demand voltage change rate detected by the load voltage detection unit; acquiring the the photovoltaic input voltage detected by the photovoltaic input detection unit; obtain the stack output voltage detected by the stack output detection unit; when the photovoltaic input voltage is less than the photovoltaic input threshold, the stack output voltage is less than the stack voltage threshold and the load demand voltage change rate is less than the threshold value of the required voltage change rate, the second rectifier switch unit is controlled to be turned on and the stack module is activated, the first rectifier switch unit is controlled to be turned off, and the charge and discharge switch unit is controlled to be turned on, so that all The stack module supplies power to the load and charges the battery; when the photovoltaic input voltage is less than the photovoltaic input threshold, the stack output voltage is less than the stack voltage threshold, and the load demand voltage change rate is greater than the demand voltage change rate threshold, the second rectifier is controlled. The switch unit is turned on and the stack module is activated, the first rectifier switch unit is controlled to be turned off and the charge and discharge switch unit is controlled to be turned on, so that the stack module and the battery can jointly supply power to the load , and control the constant current output of the stack module and control the constant voltage output of the battery; when the photovoltaic input voltage is less than the photovoltaic input threshold, the stack output voltage is greater than the stack voltage threshold and the load demand voltage change rate is less than the demand voltage change rate threshold, control the second rectifier switch unit to turn on and the stack module to start, control the first rectifier switch unit to turn off and control the charge and discharge switch unit to turn on, so as to make the stack module and the batteries together supply power for the load, and control the constant current output of the stack module and control the constant voltage output of the battery; when the photovoltaic input voltage is less than the photovoltaic input threshold, the stack output voltage is greater than the stack voltage threshold and the load demand The voltage change rate is greater than the required voltage change rate threshold, the second rectifier switch unit is controlled to be turned on and the stack module is started, the first rectifier switch unit is controlled to be turned off and the charge and discharge switch unit is controlled to be turned on, In order to make the stack module and the battery supply power for the load together, and control the constant voltage output of the stack module and control the constant current output of the battery; when the photovoltaic input voltage is higher than the photovoltaic input threshold, the stack output When the voltage is less than the stack voltage threshold and the load demand voltage change rate is less than the demand voltage change rate threshold, the first rectifier switch unit is controlled to be turned on, the electric energy converted by the photovoltaic power generation module is used to supply power to the electrolytic assembly, and the second The rectifier switch unit is turned on and the stack module is activated. The stack module supplies power to the load and obtains the stored power of the battery. If the stored power is less than the full charge threshold, the charge and discharge switch unit is controlled to be turned on. It is output by using the electric energy converted by the photovoltaic power generation module or the stack module. The output electric energy is used to charge the battery, and if the stored electricity reaches the full charge threshold, the charge and discharge switch unit is controlled to be disconnected; when the photovoltaic input voltage is greater than the photovoltaic input threshold, the stack output voltage is less than the stack voltage threshold, and the load demand voltage change rate greater than the required voltage change rate threshold, the first rectifier switch unit is controlled to be turned on, the electric energy converted by the photovoltaic power generation module is used to supply power to the electrolysis component, the second rectifier switch unit is controlled to be turned on and the stack module is controlled Start, control the conduction of the charge and discharge switch unit, so that the stack module and the battery jointly supply power for the load, control the constant current output of the stack module and control the constant voltage output of the battery; when the photovoltaic The input voltage is greater than the photovoltaic input threshold, the stack output voltage is greater than the stack voltage threshold, and the load demand voltage change rate is less than the demand voltage change rate threshold, the first rectifier switch unit is controlled to be turned on, and the electrical energy converted by the photovoltaic power generation module is used. Powering the electrolysis assembly, controlling the conduction of the second rectifier switch unit and the activation of the stack module, and controlling the conduction and conduction of the charge and discharge switch unit, so that the stack module and the battery can jointly supply power to the load , control the constant current output of the stack module and control the constant voltage output of the battery; when the photovoltaic input voltage is greater than the photovoltaic input threshold, the stack output voltage is greater than the stack voltage threshold and the load demand voltage change rate is greater than the demand voltage change rate threshold value , control the conduction of the first rectifier switch unit, use the electrical energy converted by the photovoltaic power generation module to supply power to the electrolysis component, control the conduction of the second rectifier switch unit and the start of the stack module, and control the charge and discharge switches. The unit is turned on, so that the stack module and the battery jointly supply power to the load, control the constant voltage output of the stack module and control the constant current output of the battery.

The control method according to the embodiment of the present invention has at least the following beneficial effects:

The control method of the present invention detects the output voltage of the stack, the rate of change of the load demand voltage and the photovoltaic input voltage, and controls the first rectifier switch unit and the second rectifier switch according to the stack output voltage, the rate of change of the load demand voltage and the photovoltaic input voltage. The unit, the stack module, and the charge and discharge switch unit operate, so as to stably supply power to the load and prolong the service life of the battery.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

1 is a schematic structural block diagram of an embodiment of the photovoltaic power generation hydrogen fuel cell device of the present invention;

Fig. 2 is the structural representation of water storage module;

FIG. 3 is a schematic structural diagram of a stack module.

Reference number:

Photovoltaic power generation module 100; water electrolysis module 200; positive output port 210; negative output port 220; water storage module 300; isolation structure 310; first water storage cavity 320; first water outlet 321; first return port 322; oxygen output port 323; second water storage cavity 330; second water outlet 331; second return port 332; hydrogen output port 333; hydrogen storage module 400; hydrogen inlet 410; hydrogen outlet 420; stack module 500; The first reaction chamber 510; the first air inlet 511; the third water outlet 512; the second reaction chamber 520; the second air inlet 521; the fourth water outlet 522; the first catalytic assembly 530; the second catalytic assembly 540; First steam separator 610; first booster pump 620; first check valve 630; proportional valve 640; second steam separator 710; second booster pump 720; second check valve 730; third steam separator air supply pump 760; filter 770; power management module 800; power control unit 810; first rectifier switch unit 820; second rectifier switch unit 830; battery 840; charge and discharge switch unit 850.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention.

In the description of the present invention, it should be understood that orientation descriptions are involved, such as the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal" "," "top", "bottom", "inside", "outside" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating Or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including this number, above, below, within, etc. are understood as including this number. If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating the number of the indicated technical features or the order of the indicated technical features. relation.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrally connected; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

As shown in Figures 1-3, a photovoltaic power generation hydrogen fuel cell device according to the first aspect of the present invention includes a photovoltaic power generation module 100, a power management module 800, a water electrolysis module 200, a water storage module 300, The hydrogen storage module 400 and the stack module 500, the power management module 800 are electrically connected to the photovoltaic power generation module 100, and the water electrolysis module 200 is provided with an electrolysis chamber, an electrolysis component and a positive output port 210 which are all communicated with the electrolysis chamber. And the negative output port 220, the electrolysis assembly is located in the electrolysis cavity, the power management module 800 is connected to the electrolysis assembly to be able to use the electric energy converted by the photovoltaic power generation module 100 to supply power to the electrolysis assembly, and the water storage module 300 is provided with an isolation structure 310 to separate the water storage module 310. The group 300 is divided into a first water storage cavity 320 and a second water storage cavity 330. The isolation structure 310 can allow water to pass through and can isolate oxygen, hydrogen, hydroxide ions, hydrogen peroxide, oxygen-containing radicals, hydrogen ions and One or more of metal ions, the water storage module 300 is provided with a first water outlet 321, a first return port 322 and an oxygen output port 323, all of which are communicated with the first water storage cavity 320, and are all connected with the second water storage cavity 330. The second water outlet 331, the second return port 332 and the hydrogen gas outlet 333 are connected, the first water outlet 321 is connected to the positive output port 210, the second water outlet 331 is connected to the negative electrode output port 220, and the hydrogen storage module 400 There is a hydrogen storage cavity, a hydrogen inlet 410 and a hydrogen outlet 420 connected to the hydrogen storage cavity, the hydrogen inlet 410 is connected with the hydrogen outlet 333, and the stack module 500 is provided with a membrane electrode assembly to connect the stack The module 500 is divided into a first reaction chamber 510 and a second reaction chamber 520 , the membrane electrode assembly is electrically connected to the power management module 800 , and the stack module 500 is provided with a first intake air that communicates with the first reaction chamber 510 . The port 511 and the third water outlet 512 and the second air inlet 521 and the fourth water outlet 522 are both communicated with the second reaction chamber 520. The first air inlet 511 is used to input oxygen or air, and the second air inlet 521 It is connected with the hydrogen outlet 420 , the third water outlet 512 is connected with the first return port 322 , and the fourth water outlet 522 is connected with the second return port 332 .

The present design can be applied to vehicles, such as trucks, and the power management module 800 can be connected to the air conditioner in the truck to supply power to the air conditioner.

In the photovoltaic power generation hydrogen fuel cell device of the present invention, the photovoltaic power generation module 100 can convert solar energy into electric energy, and the electric energy can be distributed through the power management module 800 to supply power to the electrolysis components. The first water storage chamber 320 and the second water storage chamber 330 Both store water, the first water storage cavity 320 and the second water storage cavity 330 provide water to the electrolysis cavity through the first water outlet 321 and the second water outlet 331 correspondingly, and the electrolysis assembly electrolyzes the water in the electrolysis cavity into hydrogen and hydrogen. Oxygen, under the action of the voltage applied by the electrolysis assembly, will accumulate at the positive electrode of the electrolysis assembly, and hydrogen will accumulate at the negative electrode of the electrolysis assembly. Entering the second water storage cavity 330 from the negative output port 220, since the water storage module 300 is provided with the isolation structure 310, oxygen will not enter the second water storage cavity 330, and hydrogen will not enter the first water storage cavity 320, Oxygen will not mix with hydrogen to cause the danger of burning, and at the same time, the isolation structure 310 allows water to pass through, keeping the water pressure in the first water storage chamber 320 and the second water storage chamber 330 balanced, and then the oxygen can be discharged from the oxygen outlet 323 Output, hydrogen can be output from the hydrogen output port 333 to the hydrogen storage module 400 for storage, thereby storing the energy converted from light energy, and when the load needs electricity, the hydrogen storage module 400 outputs to the stack module 500 At the same time, the first air inlet 511 inputs oxygen or air, the hydrogen and oxygen react in the stack module 500, the membrane electrode assembly generates electricity and outputs it to the power management module 800, and the power management module 800 outputs power for the load, The oxygen in the first reaction chamber 510 and the hydrogen in the second reaction chamber 520 will not leak to each other, the hydrogen and oxygen react to produce water, and the water in the first reaction chamber 510 can be returned from the first return port 322 to the first storage tank. In the water chamber 320, the water in the second reaction chamber 520 can be returned from the second return port 332 to the second water storage chamber 330. The returned water may carry hydrogen or oxygen, but with the above structure, hydrogen and oxygen will not be mixed , The design runs stably, is green and clean, and improves the safety of use.

The photovoltaic power generation module 100 may include a photovoltaic panel and a voltage stabilizing circuit. The photovoltaic panel absorbs sunlight and converts it into electrical energy. The voltage stabilizing circuit can stabilize and process the electrical energy, and then output it to the power management module 800 .

In some embodiments of the present invention, as shown in FIG. 2 , the water storage module 300 is located above the water electrolysis module 200 , the first water outlet 321 is located at the bottom of the first water storage cavity 320 , and the second water outlet 331 is located at the second The bottom of the water storage cavity 330 .

Specifically, the water storage module 300 is a water storage tank body, the first water storage cavity 320 and the second water storage cavity 330 need to ensure a certain amount of water, and the electrolysis assembly can be a proton exchange membrane type electrolyzer (PEM type) or an alkaline Membrane-type water electrolyzer, when water is decomposed in the electrolysis chamber to generate hydrogen and oxygen, the density of hydrogen and oxygen is lower than that of water, the hydrogen will rise and then enter the second water storage chamber 330 from the second water outlet 331, and the oxygen will also rise and then flow from the membrane. The first water outlet 321 enters the first water storage cavity 320, from which hydrogen and oxygen are separated and will not coexist in one cavity, which greatly reduces the risk of combustion caused by the mixing of hydrogen and oxygen. Specifically, the isolation structure 310 can be a proton exchange membrane.

The hydrogen storage module 400 is generally a low-pressure hydrogen storage tank made of steel or carbon fiber with a pressure resistance of 0.8-1.2 Mpa. The hydrogen inlet 410 and the hydrogen outlet 420 are located at two ends of the hydrogen storage module 400 respectively.

Generally speaking, as shown in FIG. 3 , the stack module 500 is further provided with a first catalytic assembly 530 in the first reaction chamber 510 , and the first catalytic assembly 530 is located at the first air inlet 511 and the third water outlet 512 In between, the stack module 500 is further provided with a second catalytic assembly 540 in the second reaction chamber 520, and the second catalytic assembly 540 is located between the second air inlet 521 and the fourth water outlet 522. Specifically, the first The catalytic assembly 530 and the second catalytic assembly 540 may be selected from conventional materials according to actual requirements. The first catalytic assembly 530 is used to catalyze oxygen, and the second catalytic assembly 540 is used to catalyze hydrogen.

In some embodiments of the present invention, the photovoltaic power generation hydrogen fuel cell device further includes a circulation module, and the circulation module includes a first water vapor separator 610, a first booster pump 620, a first check valve 630, and a proportional valve 640, The proportional valve 640 includes a first input end, a second input end and a mixed output end, the first water vapor separator 610 includes an input end, a water output end and a steam output end, the input end of the first water vapor separator 610 and the fourth water outlet 522 is connected, the water output end of the first water vapor separator 610 is connected with the second return port 332, the gas output end of the first water vapor separator 610 is connected with the input end of the first booster pump 620, and the first booster pump 620 is connected. The output end of the pump 620 is connected to the input end of the first check valve 630, the output end of the first check valve 630 is connected to the first input end of the proportional valve 640, the second input end of the proportional valve 640 is connected to the hydrogen outlet The port 420 is connected, and the mixed output end of the proportional valve 640 is connected to the second inlet port 521 .

Since the second reaction chamber 520 is blocked by the second catalytic assembly 540 , the hydrogen enters the second reaction chamber 520 from the second air inlet 521 , and the hydrogen passes through the second catalytic assembly 540 and is catalyzed by the second catalytic assembly 540 , the hydrogen ions pass through the membrane electrode assembly to react with oxygen. At this time, the consumption of hydrogen is combined with the air resistance of the second reaction chamber 520. Therefore, the air pressure of the fourth water outlet 522 will be lower than the air pressure of the second air inlet 521, and During the reaction process, the hydrogen in the second reaction chamber 520 needs to be in a flowing state. Therefore, the fourth water outlet 522 needs to discharge hydrogen. In order to save resources, the circulation module can recycle the hydrogen and circulate the discharged hydrogen to the second water outlet 522. Air intake 521 .

It should be noted that the fourth water outlet 522 outputs both hydrogen and water. Therefore, the first water vapor separator 610 is used to separate the hydrogen and water, and the first booster pump 620 is used to pressurize the fourth outlet. The hydrogen flowing out of the water port 522 can be mixed with the hydrogen output from the hydrogen storage module 400 and then continue to enter the second air inlet 521 , and the first check valve 630 acts as a one-way cut-off to prevent the output of the hydrogen storage module 400 from entering the second air inlet 521 . The hydrogen gas enters the first water vapor separator 610 .

In some embodiments of the present invention, a hydrogen water transmission module is further included, and the hydrogen water transmission module includes a second water vapor separator 710 , a second booster pump 720 , a second check valve 730 , and a second water vapor separator 710 Including an input end, a water output end and a steam output end, the input end of the second water vapor separator 710 is connected with the hydrogen output port 333, and the steam output end of the second water vapor separator 710 is connected with the input end of the second booster pump 720 The output end of the second booster pump 720 is connected to the input end of the second check valve 730, the output end of the second check valve 730 is connected to the hydrogen inlet 410, and the water output of the second water vapor separator 710 The ends are respectively connected with the water output end of the first water vapor separator 610 and the second return port 332 .

The hydrogen output from the hydrogen output port 333 may be mixed with a small amount of water. The second water vapor separator 710 can separate the hydrogen from the water, and the second booster pump 720 is used to pressurize the hydrogen to enter the hydrogen storage module 400, while the second water vapor separator 710 can separate the hydrogen and water. The check valve 730 can prevent leakage and backflow of hydrogen from the hydrogen storage module 400 .

Here, the water output end of the second water vapor separator 710 is connected to the water output end of the first water vapor separator 610 and the second return port 332 respectively, and the water vapor separator 610 and the second water vapor separator 710 conduct The water after gas-liquid separation can be returned to the second chamber of the water storage module 300 , and the water is recycled and used, and it is not necessary to frequently replenish water for the water storage module 300 .

In some embodiments of the present invention, the proportional valve 640 is provided with a flow meter, the flow meter is used to detect the hydrogen input at the second input end of the proportional valve 640 , and the flow meter is electrically connected to the power management module 800 .

The power management module 800 can be electrically connected to the proportional valve 640. Since the power generation of the stack module 500 and the subsequent output voltage are related to the hydrogen input, the flow meter can be used to detect the hydrogen at the second input of the proportional valve 640. Input quantity, the hydrogen input quantity is fed back to the power management module 800, the power management module 800 controls the opening of the proportional valve 640, and adjusts the reaction speed by accurately controlling the hydrogen input quantity, thereby controlling the output voltage of the stack module 500 or output current.

In some embodiments of the present invention, an oxygen-water transmission module is further included, and the oxygen-water transmission module includes a third water vapor separator 740 and a fourth water vapor separator 750 , and the third water vapor separator 740 and the fourth water vapor separator 750 All include an input end, a water output end and a steam output end. The input end of the third water vapor separator 740 is connected with the third water outlet 512, the input end of the fourth water vapor separator 750 is connected with the oxygen output port 323, and the third water vapor separator 750 is connected with the oxygen output port 323. The water output end of the water vapor separator 740 is connected to the water output end of the fourth water vapor separator 750 and the first return port 322 respectively.

The oxygen flowing out of the first water storage cavity 320 of the water storage module 300 may carry water, and the oxygen and water are separated by the fourth water vapor separator 750, and then the steam output end of the fourth water vapor separator 750 can discharge oxygen to the outside.

In the same way, the hydrogen and oxygen in the first reaction chamber 510 react to produce water, and the water and the remaining oxygen can be output from the third water outlet 512. The third water vapor separator 740 can separate the water and oxygen, and then the third water vapor is separated. The steam output end of the water vapor separator 740 can discharge oxygen to the outside, and the water output from the water output end of the third water vapor separator 740 and the water output end of the fourth water vapor separator 750 can be returned to the first chamber of the water storage module 300. , for water recycling, it is not necessary to replenish water for the water storage module 300 frequently.

It should be noted that, the first water vapor separator 610, the second water vapor separator 710, the third water vapor separator 740 and the fourth water vapor separator 750 can all be in the conventional baffle type, centrifugal type, cyclone type, gravity type , baffle type, filling type and other water vapor separators are selected.

In some embodiments of the present invention, an air supply pump 760 and a filter 770 are further included. The air supply pump 760 is used to connect with the air or oxygen source, the air supply pump 760 is connected to the input end of the filter 770, and the output end of the filter 770 Connected to the first air inlet 511 .

Similarly, since the first reaction chamber 510 has the first catalytic assembly 530, it will cause a certain barrier to the flow of oxygen. Here, the air supply pump can be used to supply air or oxygen to the first reaction chamber 510. Specifically, the air supply pump Air can be directly obtained from the environment and supplied to the first reaction chamber 510, for example, oxygen in the air reacts with hydrogen, and the filter can effectively filter particulate matter such as dust in the environment, preventing the first reaction chamber 510 from being blocked due to dust The flow channel for the flow of oxygen enables the power generation of the stack module 500 to be performed normally. Specifically, the filter may be composed of an object filled with quartz wool, molecular sieve and activated carbon.

In some embodiments of the present invention, as shown in FIG. 1 , the power management module 800 includes a power control unit 810 , a first rectifier switch unit 820 and a second rectifier switch unit 830 , and the power control unit 810 includes a photovoltaic input end, an electrolysis The output end, the stack input end and the power supply output end, the photovoltaic input end of the power supply control unit 810 is electrically connected to the photovoltaic power generation module 100, the electrolysis output end of the power supply control unit 810 is connected to the input end of the first rectifier switch unit 820, the first The output end of a rectifier switch unit 820 is electrically connected to the electrolysis assembly, the membrane electrode assembly is electrically connected to the input end of the second rectifier switch unit 830 , and the output end of the second rectifier switch unit 830 is electrically connected to the stack input end of the power control unit 810 For connection, the power supply output terminal of the power control unit 810 is used for electrical connection with the load.

The power control unit 810 may be composed of processing chips such as PLC, ARM, or FPGA in conjunction with auxiliary circuits. The first rectifier switch unit 820 and the second rectifier switch unit 830 may be composed of conventional rectifier circuits and switch devices. The power control unit 810 It is connected to the switching device in the first rectifier switch unit 820 or the second rectifier switch unit 830 to control the on-off of the first rectifier switch unit 820 or the second rectifier switch unit 830 respectively, and flows through the first rectifier switch unit 820 and the second rectifier switch unit 820 and the second rectifier switch unit 830. The current of the rectification switch unit 830 can be rectified.

In some embodiments of the present invention, the power management module 800 includes a battery 840 and a charge-discharge switch unit 850, one end of the charge-discharge switch unit 850 is connected to the battery 840, the power control unit 810 further includes a battery connection end, and the power control unit 810 The battery connection terminal of 1 is connected to the other terminal of the charge and discharge switch unit 850 .

The charge-discharge switch unit 850 can be a bidirectional rectifier circuit. Similarly, the power control unit 810 can be connected to the charge-discharge switch unit 850 to control the circuit on and off of the charge-discharge switch unit 850, and one end of the charge-discharge switch unit 850 flows to the other end. Or the current flowing from the other end to one end can be rectified.

This design utilizes the battery 840, the hydrogen fuel cell and the photovoltaic power generation module 100 to cooperate with each other to supply power to the load, so as to improve the battery life and improve the durability of the battery 840, which is safe and reliable.

The control method according to the embodiment of the second aspect of the present invention is applied to a photovoltaic power generation hydrogen fuel cell device disclosed in any of the above embodiments. The photovoltaic power generation hydrogen fuel cell device further includes a stack output detection unit, a load power detection unit, and a photovoltaic power generation hydrogen fuel cell device. The input detection unit, the power control unit 810 is respectively connected with the load voltage detection unit and the photovoltaic input detection unit, and the control method includes:

Obtain the stack output voltage detected by the load voltage detection unit, and obtain the load demand voltage change rate according to the load power; obtain the photovoltaic input voltage detected by the photovoltaic input detection unit; obtain the stack output voltage detected by the stack output detection unit;

When the photovoltaic input voltage is less than the photovoltaic input threshold, the stack output voltage is less than the stack voltage threshold, and the load demand voltage change rate is less than the demand voltage change rate threshold, the second rectifier switch unit 830 is controlled to be turned on and the stack module 500 is started, and the first A rectifier switch unit 820 is turned off and the charge-discharge switch unit 850 is controlled to be turned on, so that the stack module 500 supplies power to the load and charges the battery 840;

Specifically, the photovoltaic input threshold may be 15V, the stack voltage threshold may be 24V, and the demand voltage change rate threshold may be 50mV/s/etc., which are not specifically limited here.

When the photovoltaic input voltage is less than the photovoltaic input threshold, the stack output voltage is less than the stack voltage threshold, and the load demand voltage change rate is greater than the demand voltage change rate threshold, the second rectifier switch unit 830 is controlled to be turned on and the stack module 500 is started, and the first A rectifier switch unit 820 is turned off and the charge-discharge switch unit 850 is controlled to be turned on, so that the stack module 500 and the battery 840 jointly supply power to the load, and control the constant current output of the stack module 500 and the constant voltage output of the battery 840;

When the photovoltaic input voltage is less than the photovoltaic input threshold, the stack output voltage is greater than the stack voltage threshold, and the load demand voltage change rate is less than the demand voltage change rate threshold, the second rectifier switch unit 830 is controlled to be turned on and the stack module 500 is started, and the first A rectifier switch unit 820 is turned off and the charge-discharge switch unit 850 is controlled to be turned on, so that the stack module 500 and the battery 840 jointly supply power to the load, and control the constant current output of the stack module 500 and the constant voltage output of the battery 840;

When the photovoltaic input voltage is less than the photovoltaic input threshold, the stack output voltage is greater than the stack voltage threshold, and the load demand voltage change rate is greater than the demand voltage change rate threshold, the second rectifier switch unit 830 is controlled to be turned on and the stack module 500 is started, and the first A rectifier switch unit 820 is turned off and the charge-discharge switch unit 850 is controlled to be turned on, so that the stack module 500 and the battery 840 jointly supply power to the load, and control the constant voltage output of the stack module 500 and control the constant current output of the battery 840;

When the photovoltaic input voltage is higher than the photovoltaic input threshold, the stack output voltage is less than the stack voltage threshold, and the load demand voltage change rate is less than the demand voltage change rate threshold, the first rectifier switch unit 820 is controlled to be turned on, and the output voltage converted by the photovoltaic power generation module 100 is used. The electric energy supplies power to the electrolysis components, and controls the second rectifier switch unit 830 to be turned on and the stack module 500 to start up. The stack module 500 supplies power to the load, and obtains the stored power of the battery 840. If the stored power is less than the full charge threshold, the charging is controlled. The discharge switch unit 850 is turned on to use the electrical energy converted by the photovoltaic power generation module 100 or the electrical energy output by the stack module 500 to charge the battery 840, and if the stored electricity reaches the full charge threshold, the charge and discharge switch unit 850 is controlled to be disconnected;

When the photovoltaic input voltage is greater than the photovoltaic input threshold, the stack output voltage is less than the stack voltage threshold, and the load demand voltage change rate is greater than the demand voltage change rate threshold, the first rectifier switch unit 820 is controlled to be turned on, and the electrical energy converted by the photovoltaic power generation module 100 is used. To supply power to the electrolysis assembly, control the conduction of the second rectifier switch unit 830 and the activation of the stack module 500, and control the conduction of the charge and discharge switch unit 850, so that the stack module 500 and the battery 840 can jointly supply power to the load and control the power supply. The stack module 500 constant current output and the control battery 840 constant voltage output;

When the photovoltaic input voltage is greater than the photovoltaic input threshold, the stack output voltage is greater than the stack voltage threshold, and the load demand voltage change rate is less than the demand voltage change rate threshold, the first rectifier switch unit 820 is controlled to be turned on, and the electrical energy converted by the photovoltaic power generation module 100 is used. To supply power to the electrolysis assembly, control the conduction of the second rectifier switch unit 830 and the activation of the stack module 500, and control the conduction of the charge and discharge switch unit 850, so that the stack module 500 and the battery 840 can jointly supply power to the load and control the power supply. The stack module 500 constant current output and the control battery 840 constant voltage output;

When the photovoltaic input voltage is greater than the photovoltaic input threshold, the stack output voltage is greater than the stack voltage threshold, and the load demand voltage change rate is greater than the demand voltage change rate threshold, the first rectifier switch unit 820 is controlled to be turned on, and the electrical energy converted by the photovoltaic power generation module 100 is used. To supply power to the electrolysis assembly, control the conduction of the second rectifier switch unit 830 and the activation of the stack module 500, and control the conduction of the charge and discharge switch unit 850, so that the stack module 500 and the battery 840 can jointly supply power to the load and control the power supply. The stack module 500 outputs constant voltage and controls the constant current output of the battery 840 .

This design reasonably controls the photovoltaic power generation module 100, the hydrogen fuel electromagnetic (water electrolysis module 200, the stack module 500) and the charging of the battery 840 by setting the photovoltaic input threshold stack voltage threshold and the demand voltage change rate threshold. discharge relationship, and stably supply power to the load under the change of load demand power.

It should be noted that when the load demand voltage is stable, the stack module 500 can be used as the main power output, and the battery 840 can be used as the auxiliary power output, and the two together supply power for the load. The constant voltage output is used to stabilize the voltage supplied to the load. However, when the load demand voltage is unstable, since the power supply control unit 810 controls the output voltage by controlling the hydrogen supply to the stack module 500, and the photovoltaic power generation mode The photovoltaic input voltage generated by the electric energy converted by the group 100 is also relatively difficult to control. Therefore, when the load demand voltage is unstable, the battery 840 is selected as the main power output, and the stack module 500 is used as the auxiliary power output. The current supplies power to the load, and the stack module 500 outputs a constant voltage to stabilize the voltage.

The control method of the present invention detects the stack output voltage, the load demand voltage change rate and the photovoltaic input voltage, and rectifies the first rectifier switch unit 820 and the second rectifier switch unit 820 and the second rectifier according to the stack output voltage, the load demand voltage change rate and the photovoltaic input voltage. The switch unit 830 , the stack module 500 , and the charge-discharge switch unit 850 operate, thereby stably supplying power to the load and prolonging the service life of the battery 840 .

Further, this design can also be provided with fault protection control, which is illustrated by taking the load demand voltage of 24V as an example.

If the power is too large, that is, in any case, the power demanded by the load is twice the rated power of the battery 840, the second rectifier switch unit 830 and the charge/discharge switch unit 850 are disconnected.

If the load power increase rate is too large, the second rectifier switch unit 830 and the charge/discharge switch unit 850 are disconnected.

The photovoltaic input power caused by extreme weather is too large. If the battery 840 is not fully charged, and the load demand voltage change rate is small, the first rectifier switch unit 820 and the charge and discharge switch unit 850 are turned on, so that the photovoltaic is a water electrolysis mode at the same time. The group 200 and the battery 840 supply power; in other cases, the first rectifier switch unit 820 is turned off.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, The scope of the invention is defined by the claims and their equivalents.

Claims (10)

1. A photovoltaic power generation hydrogen fuel cell device is characterized in that, comprising: Photovoltaic power generation module; a power management module, electrically connected to the photovoltaic power generation module; The water electrolysis module is provided with an electrolysis cavity, an electrolysis assembly, and a positive output port and a negative electrode output port which are all communicated with the electrolysis cavity, the electrolysis assembly is located in the electrolysis cavity, and the power management module and the electrolysis assembly are Connected to power the electrolysis component with the electrical energy converted by the photovoltaic power generation module; The water storage module is provided with an isolation structure to divide the water storage module into a first water storage cavity and a second water storage cavity, the isolation structure can allow water to pass through and can isolate oxygen, hydrogen, hydroxide ions, water One or more of hydrogen oxide, oxygen-containing radicals, hydrogen ions and metal ions, the water storage module is provided with a first water outlet, a first return outlet and an oxygen output that are all connected with the first water storage cavity a second water outlet, a second return port and a hydrogen gas outlet that are all communicated with the second water storage cavity, the first water outlet is connected to the positive output port, and the second water outlet is connected to the The negative output port is connected; The hydrogen storage module is provided with a hydrogen storage cavity, a hydrogen inlet and a hydrogen outlet communicated with the hydrogen storage cavity, and the hydrogen inlet is connected with the hydrogen outlet; The stack module is provided with a membrane electrode assembly to separate the stack module into a first reaction chamber and a second reaction chamber, the membrane electrode assembly is electrically connected to the power management module, and the electric stack module is electrically connected to the power management module. The reactor module is provided with a first air inlet and a third water outlet that are both communicated with the first reaction chamber, and a second air inlet and a fourth water outlet that are both communicated with the second reaction chamber. An air inlet is used to input oxygen or air, the second air inlet is connected to the hydrogen outlet, the third water outlet is connected to the first return port, and the fourth water outlet is connected to the hydrogen outlet. The second return port is turned on. 2 . The photovoltaic power generation hydrogen fuel cell device according to claim 1 , wherein the water storage module is located above the water electrolysis module, and the first water outlet is located in the first water storage cavity. 3 . The bottom of the second water outlet is located at the bottom of the second water storage cavity. 3 . The photovoltaic power generation hydrogen fuel cell device according to claim 1 , further comprising a circulation module, wherein the circulation module comprises a first water vapor separator, a first booster pump, a first check valve and proportional valve, the proportional valve includes a first input end, a second input end and a mixed output end, the first water vapor separator includes an input end, a water output end and a steam output end, the first water vapor separator The input end of the water vapor separator is connected to the fourth water outlet, the water output end of the first water vapor separator is connected to the second return port, and the gas output end of the first water vapor separator is connected to the first water vapor separator. The input end of the booster pump is connected, the output end of the first booster pump is connected with the input end of the first check valve, and the output end of the first check valve is connected with the first end of the proportional valve. An input end is connected, the second input end of the proportional valve is connected to the hydrogen outlet, and the mixing output end of the proportional valve is connected to the second air inlet. 4 . The photovoltaic power generation hydrogen fuel cell device according to claim 3 , further comprising a hydrogen-water transmission module, wherein the hydrogen-water transmission module comprises a second water vapor separator, a second booster pump and a The second check valve, the second water vapor separator includes an input end, a water output end and a steam output end, the input end of the second water vapor separator is connected to the hydrogen output port, and the second water vapor separator The steam output end of the compressor is connected with the input end of the second booster pump, the output end of the second booster pump is connected with the input end of the second check valve, the second check valve The output end of the water vapor separator is connected to the hydrogen inlet port, and the water output end of the second water vapor separator is connected to the water output end of the first water vapor separator and the second return port respectively. 5 . The photovoltaic power generation hydrogen fuel cell device according to claim 3 , wherein the proportional valve is provided with a flow meter, and the flow meter is used to detect the hydrogen input at the second input end of the proportional valve. 6 . The flow meter is electrically connected to the power management module. 6 . The photovoltaic power generation hydrogen fuel cell device according to claim 1 , further comprising an oxygen-water transmission module, wherein the oxygen-water transmission module comprises a third water vapor separator and a fourth water vapor separator, 6 . Both the third water vapor separator and the fourth water vapor separator include an input end, a water output end and a steam output end, the input end of the third water vapor separator is connected to the third water outlet, and the The input end of the fourth water vapor separator is connected with the oxygen output port, and the water output end of the third water vapor separator is connected with the water output end of the fourth water vapor separator and the first return port respectively. . 7 . The photovoltaic power generation hydrogen fuel cell device according to claim 1 , further comprising an air supply pump and a filter, the air supply pump is used to connect with an air or oxygen source, and the air supply pump is connected to the air supply. 8 . The input end of the filter is connected, and the output end of the filter is connected with the first air inlet. 8 . The photovoltaic power generation hydrogen fuel cell device according to claim 1 , wherein the power management module comprises a power control unit, a first rectifier switch unit and a second rectifier switch unit, the power control unit It includes a photovoltaic input end, an electrolysis output end, a stack input end and a power supply output end. The photovoltaic input end of the power supply control unit is electrically connected to the photovoltaic power generation module, and the electrolysis output end of the power supply control unit is connected to the first The input end of a rectifier switch unit is connected, the output end of the first rectifier switch unit is electrically connected to the electrolysis assembly, the membrane electrode assembly is electrically connected to the input end of the second rectifier switch unit, and the second rectifier switch unit is electrically connected to the input end. The output end of the rectification switch unit is electrically connected with the stack input end of the power supply control unit, and the power supply output end of the power supply control unit is used for electrical connection with the load. 9 . The photovoltaic power generation hydrogen fuel cell device according to claim 8 , wherein the power management module comprises a battery and a charge and discharge switch unit, and one end of the charge and discharge switch unit is connected to the battery, 10 . The power control unit further includes a battery connection end, and the battery connection end of the power control unit is connected to the other end of the charge and discharge switch unit. 10. A control method, applied to a photovoltaic power generation hydrogen fuel cell device according to any one of claims 1-9, wherein the photovoltaic power generation hydrogen fuel cell device further comprises a stack output detection unit and a load power detection unit and a photovoltaic input detection unit, the power control unit is respectively connected to the load voltage detection unit and the photovoltaic input detection unit, wherein the control method includes: acquiring the load demand voltage change rate detected by the load voltage detection unit; acquiring the photovoltaic input voltage detected by the photovoltaic input detection unit; acquiring the stack output voltage detected by the stack output detection unit; When the photovoltaic input voltage is less than the photovoltaic input threshold, the stack output voltage is less than the stack voltage threshold, and the load demand voltage change rate is less than the demand voltage change rate threshold, the second rectifier switch unit is controlled to be turned on and the stack module is started, controlling the first rectifier switch unit to be turned off and the charge-discharge switch unit to be turned on, so that the stack module supplies power to the load and charges the battery; When the photovoltaic input voltage is less than the photovoltaic input threshold, the stack output voltage is less than the stack voltage threshold, and the load demand voltage change rate is greater than the demand voltage change rate threshold, the second rectifier switch unit is controlled to be turned on and the stack module is started, Controlling the first rectifier switch unit to turn off and the charge and discharge switch unit to turn on, so that the stack module and the battery jointly supply power for the load, and control the constant current output of the stack module and controlling the constant voltage output of the battery; When the photovoltaic input voltage is less than the photovoltaic input threshold, the stack output voltage is greater than the stack voltage threshold, and the load demand voltage change rate is less than the demand voltage change rate threshold, the second rectifier switch unit is controlled to be turned on and the stack module is started, Controlling the first rectifier switch unit to turn off and the charge and discharge switch unit to turn on, so that the stack module and the battery jointly supply power for the load, and control the constant current output of the stack module and controlling the constant voltage output of the battery; When the photovoltaic input voltage is less than the photovoltaic input threshold, the stack output voltage is greater than the stack voltage threshold, and the load demand voltage change rate is greater than the demand voltage change rate threshold, the second rectifier switch unit is controlled to be turned on and the stack module is started, Controlling the first rectifier switch unit to turn off and the charge-discharge switch unit to turn on, so that the stack module and the battery jointly supply power to the load, and control the constant voltage output of the stack module and controlling the constant current output of the battery; When the photovoltaic input voltage is higher than the photovoltaic input threshold, the stack output voltage is less than the stack voltage threshold, and the load demand voltage change rate is less than the demand voltage change rate threshold, the first rectifier switch unit is controlled to be turned on, and the photovoltaic power generation module is used. The converted electrical energy supplies power to the electrolysis assembly, controls the conduction of the second rectifier switch unit and the start of the stack module, the stack module supplies power to the load, and obtains the stored power of the battery, if the stored power is less than full If the electricity threshold is reached, the charge and discharge switch unit is controlled to be turned on to use the electrical energy converted by the photovoltaic power generation module or the electrical energy output by the stack module to charge the battery. The switch unit is disconnected; When the photovoltaic input voltage is greater than the photovoltaic input threshold, the stack output voltage is less than the stack voltage threshold, and the load demand voltage change rate is greater than the demand voltage change rate threshold, the first rectifier switch unit is controlled to be turned on, and the photovoltaic power generation module is used to convert The electric energy of the battery supplies power to the electrolysis assembly, controls the conduction of the second rectifier switch unit and the startup of the stack module, and controls the conduction of the charge and discharge switch unit, so that the stack module and the battery are jointly supplying power to the load, controlling the constant current output of the stack module and controlling the constant voltage output of the battery; When the photovoltaic input voltage is greater than the photovoltaic input threshold, the stack output voltage is greater than the stack voltage threshold, and the load demand voltage change rate is less than the demand voltage change rate threshold, the first rectifier switch unit is controlled to be turned on, and the photovoltaic power generation module is used to convert The electric energy of the battery supplies power to the electrolysis assembly, controls the conduction of the second rectifier switch unit and the startup of the stack module, and controls the conduction of the charge and discharge switch unit, so that the stack module and the battery are jointly supplying power to the load, controlling the constant current output of the stack module and controlling the constant voltage output of the battery; When the photovoltaic input voltage is greater than the photovoltaic input threshold, the stack output voltage is greater than the stack voltage threshold, and the load demand voltage change rate is greater than the demand voltage change rate threshold, the first rectifier switch unit is controlled to be turned on, and the photovoltaic power generation module is used to convert The electric energy of the battery supplies power to the electrolysis assembly, controls the conduction of the second rectifier switch unit and the startup of the stack module, and controls the conduction of the charge and discharge switch unit, so that the stack module and the battery are jointly The load supplies power, controls the constant voltage output of the stack module and controls the constant current output of the battery.

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