A hydrogen energy backup power supply system suitable for water conservancy projects

Abstract

The present invention discloses a hydrogen energy backup power supply system suitable for water conservancy projects, which relates to the technical field of water conservancy project power supply, including: a hydrogen energy power supply subsystem: providing power to the load according to control settings; a mains power supply subsystem: used to provide power to the load according to control settings; a bypass power supply subsystem: when the mains power supply is normal and the hydrogen energy power supply subsystem fails, it provides power to the load system; an emergency power supply subsystem: providing a maintenance circuit to provide power to the load system; a DC power supply subsystem: providing power to the DC load system; a control subsystem: used to control the power supply lines of the hydrogen energy and mains power supply systems, and monitor the operating status of the power supply system. The present invention avoids the problems of multiple faults such as the need for professional personnel to be on duty during the cold start of the diesel generator, and the generation of harmful gases during combustion, and can effectively guarantee the power demand of water conservancy projects and reduce the loss of people's personal safety and property caused by sudden power outages.

Description

Technical Field

[0001] The invention relates to the technical field of water conservancy project power supply, and more particularly to a hydrogen energy backup power supply system suitable for water conservancy projects. Background Art

[0002] At present, hydrogen energy, as an emerging clean energy, is gradually becoming an important pillar of global energy transformation and sustainable development with its multiple advantages such as environmental friendliness, high energy efficiency, strong renewability, diversified application scenarios and cost reduction potential, showing great potential in energy transformation and green development.

[0003] A hydrogen fuel cell is a power generation device that directly converts the chemical energy of hydrogen and oxygen into electrical energy. Its basic principle is the reverse reaction of water electrolysis, providing hydrogen and oxygen to the anode and cathode respectively. When hydrogen diffuses outward through the anode and reacts with the electrolyte, electrons are released and reach the cathode through an external load. Fuel cells do not pollute the environment, and they use electrochemical reactions instead of combustion (gasoline, diesel). Fuel cells can only produce water and heat, without harmful emissions, and have low labor maintenance costs and strong temperature adaptability.

[0004] In the field of water conservancy projects, electricity requirements are high, and sudden power outages will cause losses to people's personal safety and property, so water conservancy projects are usually equipped with backup power supplies. Common backup power supplies can be diesel generators, but when diesel generators are started cold, due to the high viscosity and poor fluidity of the generator oil, cylinder pulling, tile burning and other faults are prone to occur, so professional maintenance personnel are required to be on duty. In addition, diesel generators will produce a large amount of harmful gases and noise during power generation and combustion, which has a great impact on the surrounding environment. In addition, diesel generators may encounter various faults during use, such as difficulty starting, insufficient power, etc. These problems may be caused by a variety of reasons, including fuel system blockage, poor injector atomization, insufficient cylinder compression pressure, etc.

[0005] Therefore, how to solve the above shortcomings by replacing the traditional power source of diesel generators is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0006] In view of this, the present invention provides a hydrogen energy backup power supply system suitable for water conservancy projects to solve the problems existing in the background technology.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] A hydrogen energy backup power supply system suitable for water conservancy projects, comprising: a hydrogen energy power supply subsystem, a city power supply subsystem, a bypass power supply subsystem, an emergency power supply subsystem, a DC power supply subsystem, and a control subsystem;

[0009] The hydrogen energy supply subsystem is used to provide power to the load according to the control setting;

[0010] The mains power supply subsystem is used to provide power to the load according to the control setting;

[0011] The bypass power supply subsystem: when the mains power supply is normal and the hydrogen energy power supply subsystem fails, provides power to the load system;

[0012] The emergency power supply subsystem: when the hydrogen energy power supply subsystem and the bypass power supply subsystem fail at the same time, a maintenance circuit is provided to supply power to the load system;

[0013] The DC power supply subsystem provides power to the DC load system;

[0014] The control subsystem is used to control the working lines of the emergency power supply system and monitor the operating status of the emergency power supply system.

[0015] Optionally, the hydrogen energy supply subsystem includes: a hydrogen supply system, an oxygen / air supply system, a hydrogen circulation subsystem, an oxygen circulation subsystem, a humidification subsystem, a cooling subsystem, and a fuel cell stack unit;

[0016] The hydrogen supply system is connected to the humidification subsystem, the fuel cell stack unit, and the oxygen / air supply system in sequence;

[0017] The fuel cell stack unit is connected to the hydrogen circulation subsystem through the exhaust port; the hydrogen circulation subsystem is connected to the hydrogen supply system;

[0018] The oxygen circulation subsystem is connected to the oxygen / air supply system;

[0019] The fuel cell stack unit is connected with the cooling subsystem and the humidification subsystem in sequence;

[0020] The fuel cell stack unit is also connected to the lithium battery charging and discharging unit (9) via a voltage stabilizing output unit.

[0021] Optionally, the mains power supply subsystem includes: a mains power supply, a filter, a rectifier, a DC / DC converter, an inverter, a first static switch, and a first switch;

[0022] The mains power supply is connected to the filter, the rectifier, the DC / DC converter, the inverter, the first static switch, and the first switch in sequence, and is connected to the end load power supply circuit.

[0023] Optionally, the bypass power supply subsystem includes: a mains power supply, a second static switch, and a first switch; wherein the mains power supply is connected to the second static switch and the first switch, and is connected to a terminal load power supply circuit.

[0024] Optionally, the emergency power supply subsystem includes: a mains power supply and a second switch; wherein the mains power supply is connected to the second switch and is connected to a terminal load power supply circuit.

[0025] Optionally, the DC power supply subsystem includes: a DC / DC converter and a third switch; wherein the DC / DC converter is connected to the third switch and is connected to a DC load power supply circuit.

[0026] Optionally, the control subsystem includes: a control unit, a voltage and current detection unit, and a lithium battery charging and discharging unit; the voltage and current detection unit receives the voltage and current on the input and output sides of the lithium battery charging and discharging unit, and also receives the voltage and current values ​​on the output side of the rectifier; the control unit receives the data from the voltage and current detection unit, and outputs a control signal to control the lithium battery charging and discharging unit according to the control setting.

[0027] Optionally, the control setting includes setting the mains priority, hydrogen energy priority, or alternating priority by the control unit touching the display screen;

[0028] When the mains power priority is set, the mains power supply is connected to the filter, rectifier, DC / DC converter, inverter, first static switch, and first switch in sequence, and connected to the end load power supply circuit, and the control unit touch screen displays the current mains power access status and hydrogen power supply status; when the hydrogen energy priority is set, the hydrogen energy supply subsystem starts to run, and the control unit touch screen displays the current mains power access status and hydrogen power supply status; when the alternating priority is set, the mains power supply subsystem and the hydrogen energy supply subsystem cycle the above process according to the set number of operation cycles, and the control unit touch screen displays the current mains power access status and hydrogen power supply status;

[0029] When the AC power priority is set, when the AC power supply is connected to the power supply circuit, the voltage and current detection unit receives the voltage and current values ​​at the input and output sides of the lithium battery charging and discharging unit, receives the voltage and current values ​​at the output side of the rectifier, and connects to the control unit through a signal line. The control unit determines whether the quality of the AC input power meets the requirements according to the judgment conditions; and the control unit sends a switching start signal to the hydrogen energy supply subsystem, and the hydrogen energy supply subsystem receives the signal and executes the start action;

[0030] When hydrogen energy priority is set, when the hydrogen energy power supply subsystem is in normal operation, the voltage and current detection unit receives the voltage and current values ​​on the input and output sides of the lithium battery charging and discharging unit, and connects to the control unit through a signal line. The control unit determines whether the output power quality of the lithium battery charging and discharging unit of the hydrogen energy power supply subsystem meets the requirements based on the judgment conditions; and the control unit sends a switching signal to the AC power supply subsystem switch to switch to AC power supply.

[0031] Optionally, after the hydrogen energy supply subsystem is started, the control unit monitors the hydrogen supply pressure, hydrogen supply gas flow, air supply gas flow, air inlet and outlet stack temperatures, and coolant temperature in real time.

[0032] Optionally, the method further comprises generating electrical energy through a chemical reaction between hydrogen and oxygen, releasing heat at the same time, and using a coolant to maintain a stable temperature of the fuel cell; the hydrogen generated by the hydrogen supply system and the hydrogen circulation subsystem and the oxygen generated by the oxygen / air supply system and the oxygen circulation subsystem are humidified by the humidification subsystem and then injected into the fuel cell stack unit; chemical energy is converted into electrical energy through a chemical reaction in the fuel cell stack unit; the cooling subsystem circulates the coolant inside the battery stack to absorb and take away excess heat in the fuel cell, thereby preventing overheating and ensuring stable operation of the battery; the electrical energy generated by the fuel cell stack unit is transmitted to the lithium battery charging and discharging module (9) through the voltage stabilizing output unit, and the electrical energy is stored in the lithium battery charging and discharging module to supply power to the load.

[0033] Through the above technical solutions, it can be known that compared with the prior art, the present invention discloses a hydrogen energy backup power supply system suitable for water conservancy projects, including: a hydrogen energy supply subsystem: providing power to the load according to the control setting; the mains power supply subsystem: used to provide power to the load according to the control setting; the bypass power supply subsystem: when the mains power supply is normal and the hydrogen energy supply subsystem fails, it provides power to the load system; the emergency power supply subsystem: when the hydrogen energy supply subsystem and the bypass power supply subsystem fail at the same time, a maintenance circuit is provided to provide power to the load system; the DC power supply subsystem: provides power to the DC load system; the control subsystem: used to control the power supply lines of the hydrogen energy and the mains power supply system, and monitor the operating status of the power supply system. In terms of energy type, the present invention utilizes hydrogen energy, an emerging clean energy, which has the advantages of environmental friendliness, high energy efficiency, strong renewability, etc., and hydrogen fuel cell power generation is pollution-free, has low labor maintenance costs, and has strong temperature adaptability. Compared with the traditional diesel generator backup power supply, it avoids the problems of diesel generator cold start-up being prone to failures and requiring professional personnel to be on duty, combustion producing harmful gases and noise polluting the environment, and possible starting difficulties, insufficient power and other failures. It can effectively guarantee the electricity demand of water conservancy projects and reduce the losses to people's personal safety and property caused by sudden power outages. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0035] Figure 1 A schematic diagram of the system structure provided by the present invention;

[0036] In the figure, 1-hydrogen supply system, 2-oxygen / air supply system, 3-hydrogen circulation subsystem, 4-oxygen circulation subsystem, 5-humidification subsystem, 6-cooling subsystem, 7-fuel cell stack unit, 8-voltage stabilization output unit, 9-lithium battery charging and discharging unit, 10-DC / DC converter, 11-rectifier, 12-filter, 13-mains power supply, 14-inverter, 15-first static switch, 16-second static switch, 17-control unit, 18-voltage and current detection unit, 19-first switch, 20-second switch; 21-third switch. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The embodiment of the present invention discloses a hydrogen energy backup power supply system suitable for water conservancy projects, such as Figure 1 As shown, it includes: hydrogen energy power supply subsystem, mains power supply subsystem, bypass power supply subsystem, emergency power supply subsystem, DC power supply subsystem, and control subsystem;

[0039] Hydrogen energy supply subsystem: used to provide power to the load according to the control settings;

[0040] Mains power supply subsystem: used to provide power to the load according to the control settings;

[0041] Bypass power supply subsystem: Provides power to the load system when the mains power supply is normal and the hydrogen energy power supply subsystem fails;

[0042] Emergency power supply subsystem: When the hydrogen energy power supply subsystem and bypass power supply subsystem fail at the same time, a maintenance circuit is provided to supply power to the load system;

[0043] DC power supply subsystem: provides power to the DC load system;

[0044] Control subsystem: used to control the working lines of the emergency power supply system and monitor the operating status of the emergency power supply system.

[0045] In a specific embodiment, the hydrogen energy supply subsystem includes: a hydrogen supply system 1, an oxygen / air supply system 2, a hydrogen circulation subsystem 3, an oxygen circulation subsystem 4, a humidification subsystem 5, a cooling subsystem 6, and a fuel cell stack unit 7;

[0046] The hydrogen supply system 1 is connected to the humidification subsystem 5, the fuel cell stack unit 7, and the oxygen / air supply system 2 in sequence;

[0047] The fuel cell stack unit 7 is connected to the hydrogen circulation subsystem 3 through the exhaust port; the hydrogen circulation subsystem 3 is connected to the hydrogen supply system 1;

[0048] The oxygen circulation subsystem 4 is connected to the oxygen / air supply system 2;

[0049] The fuel cell stack unit 7 is connected to the cooling subsystem 6 and the humidification subsystem 5 in sequence;

[0050] The fuel cell stack unit 7 is also connected to the lithium battery charging and discharging unit 9 via a voltage stabilizing output unit 8 .

[0051] In a specific embodiment, the mains power supply subsystem includes: a mains power supply 13, a filter 12, a rectifier 11, a DC / DC converter 10, an inverter 14, a first static switch 15, and a first switch 19;

[0052] The AC power supply 13 is connected to the filter 12, the rectifier 11, the DC / DC converter 10, the inverter 14, the first static switch 15, and the first switch 19 in sequence, and is connected to the end load power supply circuit.

[0053] In a specific embodiment, the bypass power supply subsystem includes: a mains power supply 13, a second static switch 16, and a first switch 19; wherein the mains power supply 13 is connected to the second static switch 16 and the first switch 19, and is connected to the end load power supply circuit.

[0054] In a specific embodiment, the emergency power supply subsystem includes: a mains power supply 13 and a second switch 20; wherein the mains power supply 13 is connected to the second switch 20 and is connected to the end load power supply circuit.

[0055] In a specific embodiment, the DC power supply subsystem includes: a DC / DC converter 10 and a third switch 21 ; wherein the DC / DC converter is connected to the third switch 21 and is connected to a DC load power supply circuit.

[0056] In a specific embodiment, the control subsystem includes: a control unit 17, a voltage and current detection unit 18, and a lithium battery charging and discharging unit 9; the voltage and current detection unit 18 receives the voltage and current on the input and output sides of the lithium battery charging and discharging unit 9, and simultaneously receives the voltage and current values ​​on the output side of the rectifier 11; the control unit 17 receives the data from the voltage and current detection unit 18, and outputs a control signal to control the lithium battery charging and discharging unit 9 according to the control setting.

[0057] In a specific embodiment, the control setting includes the control unit 17 touching the display screen to set the mains priority, hydrogen energy priority, and alternating priority;

[0058] When the mains priority is set, the mains power supply 13 is connected to the filter 12, the rectifier 11, the DC / DC converter 10, the inverter 14, the first static switch 15, and the first switch 19 in sequence, and connected to the end load power supply circuit, and the control unit 17 touch screen displays the current mains access status and hydrogen energy power supply status; when the hydrogen energy priority is set, the hydrogen energy supply subsystem starts to run, and the control unit 17 touch screen displays the current mains access status and hydrogen energy power supply status; when the alternating priority is set, the mains power supply subsystem and the hydrogen energy supply subsystem cycle the above process according to the set number of operation cycles, and the control unit 17 touch screen displays the current mains access status and hydrogen energy power supply status;

[0059] When the mains power is set to be prioritized, when the mains power supply 13 is connected to the power supply circuit, the voltage and current detection unit 18 receives the voltage and current values ​​at the input and output sides of the lithium battery charging and discharging unit 9, receives the voltage and current values ​​at the output side of the rectifier 11, and connects to the control unit 17 through a signal line. The control unit 17 determines whether the quality of the mains input power meets the requirements according to the determination conditions; and the control unit sends a switching start signal to the hydrogen energy supply subsystem, and the hydrogen energy supply subsystem receives the signal and performs the start action;

[0060] When hydrogen energy priority is set, when the hydrogen energy supply subsystem is in normal operation, the voltage and current detection unit 18 receives the voltage and current values ​​on the input and output sides of the lithium battery charging and discharging unit 9, and connects to the control unit 17 through a signal line. The control unit 17 determines whether the output power quality of the lithium battery charging and discharging unit 9 of the hydrogen energy supply subsystem meets the requirements according to the judgment conditions; and the control unit sends a switching signal to the AC power supply subsystem switch to switch to AC power supply.

[0061] In a specific embodiment, after the hydrogen energy supply subsystem is started, the control unit 17 monitors the hydrogen supply pressure, hydrogen supply gas flow, air supply gas flow, air inlet and outlet stack temperatures, and coolant temperature in real time.

[0062] In a specific embodiment, it also includes generating electrical energy through the chemical reaction of hydrogen and oxygen, releasing heat at the same time, and using coolant to maintain a stable temperature of the fuel cell; the hydrogen generated by the hydrogen supply system 1 and the hydrogen circulation subsystem 3 and the oxygen generated by the oxygen / air supply system 2 and the oxygen circulation subsystem 4 are humidified by the humidification subsystem 5 and then injected into the fuel cell stack unit 7; the chemical energy is converted into electrical energy through a chemical reaction in the fuel cell stack unit 7; the cooling subsystem 6 circulates the coolant inside the battery stack to absorb and take away excess heat in the fuel cell, prevent overheating and ensure stable operation of the battery; the electrical energy generated by the fuel cell stack unit 7 is transmitted to the lithium battery charging and discharging module 9 through the voltage stabilizing output unit 8, and the electrical energy is stored in the lithium battery charging and discharging module 9 to power the load.

[0063] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0064] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hydrogen energy backup power supply system suitable for water conservancy projects, characterized in that: include: Hydrogen energy power supply subsystem, mains power supply subsystem, bypass power supply subsystem, emergency power supply subsystem, DC power supply subsystem, control subsystem; The hydrogen energy supply subsystem is used to provide power to the load according to the control setting; The mains power supply subsystem is used to provide power to the load according to the control setting; The bypass power supply subsystem: when the mains power supply is normal and the hydrogen energy power supply subsystem fails, provides power to the load system; The emergency power supply subsystem: when the hydrogen energy power supply subsystem and the bypass power supply subsystem fail at the same time, a maintenance circuit is provided to supply power to the load system; The DC power supply subsystem provides power to the DC load system; The control subsystem is used to control the working lines of the emergency power supply system and monitor the operating status of the emergency power supply system.

2. A hydrogen energy backup power supply system suitable for water conservancy projects according to claim 1, characterized in that: The hydrogen energy supply subsystem comprises: a hydrogen supply system (1), an oxygen / air supply system (2), a hydrogen circulation subsystem (3), an oxygen circulation subsystem (4), a humidification subsystem (5), a cooling subsystem (6), and a fuel cell stack unit (7); The hydrogen supply system (1) is connected to the humidification subsystem (5), the fuel cell stack unit (7), and the oxygen / air supply system (2) in sequence; The fuel cell stack unit (7) is connected to the hydrogen circulation subsystem (3) via an exhaust port; the hydrogen circulation subsystem (3) is connected to the hydrogen supply system (1); The oxygen circulation subsystem (4) is connected to the oxygen / air supply system (2); The fuel cell stack unit (7) is connected to the cooling subsystem (6) and the humidification subsystem (5) in sequence; The fuel cell stack unit (7) is also connected to a lithium battery charging and discharging unit (9) via a voltage stabilizing output unit (8).

3. A hydrogen energy backup power supply system suitable for water conservancy projects according to claim 1, characterized in that: The mains power supply subsystem comprises: a mains power supply (13), a filter (12), a rectifier (11), a DC / DC converter (10), an inverter (14), a first static switch (15), and a first switch (19); The mains power supply (13) is connected to the filter (12), the rectifier (11), the DC / DC converter (10), the inverter (14), the first static switch (15), and the first switch (19) in sequence, and is connected to the end load power supply circuit.

4. A hydrogen energy backup power supply system suitable for water conservancy projects according to claim 1, characterized in that: The bypass power supply subsystem comprises: a mains power supply (13), a second static switch (16), and a first switch (19); wherein the mains power supply (13) is connected to the second static switch (16) and the first switch (19), and is connected to a terminal load power supply circuit.

5. The hydrogen energy backup power supply system suitable for water conservancy projects according to claim 1 is characterized in that: The emergency power supply subsystem comprises: a mains power supply (13) and a second switch (20); wherein the mains power supply (13) is connected to the second switch (20) and is connected to a terminal load power supply circuit.

6. The hydrogen energy backup power supply system suitable for water conservancy projects according to claim 1 is characterized in that: The DC power supply subsystem comprises: a DC / DC converter (10) and a third switch (21); wherein the DC / DC converter is connected to the third switch (21) and is connected to a DC load power supply circuit.

7. The hydrogen energy backup power supply system suitable for water conservancy projects according to claim 1 is characterized in that: The control subsystem comprises: a control unit (17), a voltage and current detection unit (18), and a lithium battery charging and discharging unit (9); the voltage and current detection unit (18) receives the voltage and current at the input side and the output side of the lithium battery charging and discharging unit (9), and simultaneously receives the voltage and current values ​​at the output side of the rectifier (11); the control unit (17) receives data from the voltage and current detection unit (18), and outputs a control signal to control the lithium battery charging and discharging unit (9) according to a control setting.

8. A hydrogen energy backup power supply system suitable for water conservancy projects according to claim 7, characterized in that: The control setting includes the control unit (17) touching the display screen to set the mains priority, hydrogen energy priority, and alternating priority; When the mains power is set to be prioritized, the mains power supply (13) is connected to the filter (12), the rectifier (11), the DC / DC converter (10), the inverter (14), the first static switch (15), and the first switch (19) in sequence, and connected to the end load power supply circuit, and the control unit (17) touch screen displays the current mains power access status and hydrogen energy power supply status; When hydrogen energy priority is set, the hydrogen energy supply subsystem starts to operate, and the control unit (17) touch screen displays the current mains power access status and hydrogen energy supply status; when alternating priority is set, the mains power supply subsystem and the hydrogen energy supply subsystem cycle the above process according to the set number of operation cycles, and the control unit (17) touch screen displays the current mains power access status and hydrogen energy supply status; When the mains power is set to take priority, when the mains power supply (13) is connected to the power supply circuit, the voltage and current detection unit (18) receives the voltage and current values ​​of the input side and output side of the lithium battery charging and discharging unit (9), receives the voltage and current values ​​of the output side of the rectifier (11), and connects to the control unit (17) through a signal line. The control unit (17) determines whether the quality of the mains input power meets the requirements according to the determination conditions; and the control unit sends a switching start signal to the hydrogen energy supply subsystem, and the hydrogen energy supply subsystem receives the signal and executes the start action; When hydrogen energy priority is set, when the hydrogen energy supply subsystem is in normal operation, the voltage and current detection unit (18) receives the voltage and current values ​​of the input side and the output side of the lithium battery charging and discharging unit (9), and connects to the control unit (17) through a signal line. The control unit (17) determines whether the output power quality of the lithium battery charging and discharging unit (9) of the hydrogen energy supply subsystem meets the requirements according to the determination conditions; and the control unit sends a switching signal to the switch of the mains power supply subsystem to switch to the mains power supply.

9. A hydrogen energy backup power supply system suitable for water conservancy projects according to claim 8, characterized in that: After the hydrogen energy supply subsystem is started, the control unit (17) monitors the hydrogen supply pressure, hydrogen supply gas flow, air supply gas flow, air inlet and outlet stack temperatures, and coolant temperature in real time.

10. The hydrogen energy backup power supply system suitable for water conservancy projects according to claim 1, characterized in that: The invention also includes generating electric energy through a chemical reaction between hydrogen and oxygen, releasing heat at the same time, and using a coolant to maintain a stable temperature of the fuel cell; the hydrogen generated by the hydrogen supply system (1) and the hydrogen circulation subsystem (3) and the oxygen generated by the oxygen / air supply system (2) and the oxygen circulation subsystem (4) are humidified by a humidification subsystem (5) to inject dry hydrogen / oxygen into a fuel cell stack unit (7); chemical energy is converted into electric energy through a chemical reaction in the fuel cell stack unit (7); the cooling subsystem (6) circulates the coolant inside the battery stack to absorb and take away excess heat in the fuel cell, thereby preventing overheating and ensuring stable operation of the battery; the electric energy generated by the fuel cell stack unit (7) is transmitted to a lithium battery charging and discharging module (9) through a voltage stabilizing output unit (8), and the electric energy is stored in the lithium battery charging and discharging module (9) to supply power to a load.

Images