An emergency power supply system based on hydrogen fuel cells

Abstract

The present invention provides an emergency power supply system based on hydrogen fuel cells, including: a main power supply subsystem for: providing power to a load system when the mains is normally powered; a bypass power supply subsystem for: providing power to a load system when the mains is normally powered and the internal electrical system is abnormal; a battery pack power supply subsystem and a hydrogen fuel cell power supply subsystem for: providing power to a load system when the mains is abnormal; a maintenance power supply subsystem for: providing a maintenance circuit and providing power to the load system; a control subsystem for: controlling the working line of the emergency power supply system and monitoring the operating status of the emergency power supply system. The emergency power supply system has high reliability and meets long-term power supply needs. It can still provide stable power to the load system uninterruptedly when the mains is abnormal or when some electrical appliances in the device are abnormal. At the same time, it can realize the maintenance and replacement of the internal electrical components of the device without powering off the load system.

Description

Technical Field

[0001] The present invention belongs to the technical field of emergency power supply, and in particular relates to an emergency power supply system based on a hydrogen fuel cell. Background Art

[0002] Hydrogen energy is one of the renewable energy sources with good combustion performance. Its combustion products are environmentally friendly. It conforms to the current trend of low-carbon energy and has important application value in life and industry.

[0003] Hydrogen fuel cells use the reverse reaction principle of water electrolysis to directly convert the chemical energy of hydrogen and oxygen into electrical energy. Compared with AC diesel engines, they do not produce polluting gases, have low labor maintenance costs, and have strong temperature adaptability.

[0004] In the fields of transportation, banking, securities, communications, medical treatment, industrial equipment, etc., the power consumption requirements are high, and sudden power outages will cause losses to the personal safety and property of users, so these fields are usually equipped with backup power supplies. Common backup power supplies on the market can be divided into three types: battery power supply, oil generator power generation, and oil generator and battery power generation. Battery power supply, due to the limitation of battery capacity, is usually suitable for single machine, low power, and short-term power supply; the latter two methods, due to the use of oil engines, although they can provide high power and long-term power supply, but when the oil generator is cold-started, due to the high viscosity and poor fluidity of the generator oil, it is easy to cause cylinder pulling, tile burning and other faults, so professional maintenance personnel are required to be on duty. In addition, the combustion of the oil engine will produce a large amount of harmful gases and noise, which has a great impact on the surrounding environment. In addition, the common power supply circuit design is relatively simple, does not fully consider the natural aging of the electrical system and the quality abnormality, lacks high reliability, and power supply abnormalities will occur in emergencies. Summary of the invention

[0005] In order to solve the above technical problems, the present invention proposes an emergency power supply system based on hydrogen fuel cells to improve power supply reliability and reduce power supply pollution.

[0006] To achieve the above object, the present invention provides an emergency power supply system based on hydrogen fuel cells, comprising: a main power supply subsystem, a bypass power supply subsystem, a maintenance power supply subsystem, a battery pack power supply subsystem, a hydrogen fuel cell power supply subsystem, a control subsystem and a load system;

[0007] The main power supply subsystem is used to: provide power to the load system when the mains power is normally supplied;

[0008] The bypass power supply subsystem is used to: provide power to the load system when the mains power supply is normal and the internal electrical system is abnormal;

[0009] The battery pack power supply subsystem and the hydrogen fuel cell power supply subsystem are both used to: provide power to the load system when the mains power is abnormal;

[0010] The maintenance power supply subsystem is used to: provide a maintenance circuit to provide power to the load system;

[0011] The control subsystem is used to control the working line of the emergency power supply system and monitor the operating status of the emergency power supply system.

[0012] Optionally, the control subsystem includes: a gas detector, a first valve, a second valve, a power detector, a control center, a display panel, a battery pack, a first switch, a second switch, a third switch, a fourth switch, a control center, a display panel and an audible and visual alarm;

[0013] The main power supply subsystem includes: a mains power end, a first filter, a rectifier, a first inverter, a second filter, an input end A of a first static switch, an output end of the first static switch, a fifth switch and the load system connected in sequence; wherein the mains power end electrically connects the first filter, the rectifier, the first inverter and the second filter in series in sequence, connects to the input end A of the first static switch, and then electrically connects the output end of the first static switch, the fifth switch and the load system in sequence;

[0014] The bypass power supply subsystem includes: a mains terminal, a first switch, a first filter, an input terminal B of a first static switch, an output terminal of the first static switch, a fifth switch, a second inverter, a third filter, an input terminal A of the second static switch and the load system; wherein the mains terminal, the first switch, the first filter and the input terminal B of the first static switch are electrically connected, and then the output terminal of the first static switch, the fifth switch and the load system are electrically connected in sequence;

[0015] The maintenance power supply subsystem comprises: a mains terminal, a second switch and the load system connected in sequence;

[0016] The hydrogen fuel supply subsystem includes: a fuel cell, a DC transformer, a three-way connector, a first valve, a second valve, a hydrogen bottle, a backup gas source, and an input terminal A of a first static switch; wherein the fuel cell is connected to the first valve and the second valve through a three-way connector, the first valve is connected to the hydrogen bottle, and the second valve is connected to the backup gas source;

[0017] The battery pack power supply subsystem includes: a battery pack, a first inverter, a second inverter, a second filter, a third filter and an input end A of a second static switch; wherein the battery pack is connected to a rectifier, a DC transformer, a first inverter, a second inverter and a control center through a third switch and a fourth switch.

[0018] Optionally, when the AC power is supplied normally, the AC power end sequentially passes through the first filter, rectifier, first inverter, second filter, input end A of the first static switch, output end of the first static switch and the fifth switch to provide power to the load system and charge the battery pack at the same time.

[0019] Optionally, the internal electrical abnormality includes: a first internal electrical abnormality and a second internal electrical abnormality;

[0020] The first internal electrical abnormality is: the rectifier, the first filter or the second filter is damaged;

[0021] The second internal electrical abnormality is: the first static switch is damaged.

[0022] Optionally, when the AC power is supplied normally and the first internal electrical abnormality occurs, the AC power end provides power to the load system through the first switch, the first filter, the input end B of the first static switch, the output end of the first static switch and the fifth switch, and charges the battery pack through the rectifier.

[0023] Optionally, when the AC power is normally supplied and the second internal electrical abnormality occurs, the AC power end provides power to the load system through the first filter, rectifier, second inverter, third filter, and input end A of the second static switch, and charges the battery pack at the same time.

[0024] Optionally, the mains power abnormality includes: when the mains power is abnormal and the load system only needs to be powered off for a short time and when the mains power is abnormal and the load system must be powered on for a long time.

[0025] Optionally, when the mains power is abnormal and the load system only needs to be powered off for a short time, the battery pack supplies power to the load system through the first inverter, the second filter, and the input terminal A of the first static switch;

[0026] When the mains power is abnormal and the load system must be powered for a long time, that is, when the power of the battery pack is less than half, the first valve opens, the fuel cell starts, and the load system is provided with power for a long time through the DC transformer, the first inverter, the second filter and the input terminal A of the first static switch.

[0027] Optionally, when the AC power is abnormal and the input terminal A of the first inverter, the second filter and the first static switch is damaged, the battery pack supplies power to the load system through the second inverter, the third filter and the input terminal A of the second static switch. When the power of the battery pack is less than half, the first valve opens, the fuel cell starts, and the DC transformer, the first inverter, the second filter and the input terminal A of the first static switch are used to provide long-term power to the load system.

[0028] Optionally, the display panel is used to display the current working line and abnormal working status, and when an abnormality occurs, the sound and light alarm will sound an alarm.

[0029] Compared with the prior art, the present invention has the following advantages and technical effects:

[0030] High reliability: various electrical fault conditions are taken into consideration to ensure power supply reliability;

[0031] Uninterrupted power supply: Sudden power outages will not interfere with the load system, and can provide stable power to the load system uninterruptedly. At the same time, the internal electrical components of the device can be repaired and replaced without powering off the load system;

[0032] Long power supply time: It uses hydrogen fuel cells to supply power, and can supply power continuously when there is sufficient hydrogen;

[0033] Clean and environmentally friendly: Hydrogen and oxygen react to produce water, which is environmentally friendly;

[0034] Low maintenance cost: Fuel cells have low maintenance costs and hydrogen cylinders are easy to replace. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0036] Figure 1 This is a schematic diagram of the structure of an emergency power supply system based on a hydrogen fuel cell according to an embodiment of the present invention;

[0037] Among them, 1 is the AC power end, 2 is the first filter, 3 is the rectifier, 4 is the first inverter, 5 is the second filter, 6 is the first static switch, 7 is the load system, 8 is the display panel, 9 is the control center, 10 is the battery pack, 11 is the second inverter, 12 is the third filter, 13 is the second static switch, 14 is the power detector, 15 is the fuel cell, 16 is the DC transformer, 17 is the three-way connector, 18 is the first valve, 19 is the second valve, 20 is the hydrogen cylinder, 21 is the backup gas source, 22 is the gas detector, 23 is the second switch, 24 is the first switch, 25 is the third switch, 26 is the fourth switch, 27 is the fifth switch, 28 is the maintenance circuit, 29 is the bypass circuit, 30 is the main circuit, 31 is the hydrogen supply module, and 32 is the sound and light alarm. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] It should be noted that the steps shown in the flowcharts of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and that, although a logical order is shown in the flowcharts, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0040] Example

[0041] like Figure 1 As shown, this embodiment provides an emergency power supply system based on hydrogen fuel cells, including: a main power supply subsystem, a bypass power supply subsystem, a maintenance power supply subsystem, a battery pack power supply subsystem, a hydrogen fuel cell power supply subsystem, a control subsystem and a load system;

[0042] The main power supply subsystem is used to provide power to the load system when the mains power is normally supplied; the bypass power supply subsystem is used to provide power to the load system when the mains power is normally supplied and there is an internal electrical abnormality; the battery pack power supply subsystem and the hydrogen fuel cell power supply subsystem are both used to provide power to the load system when the mains power is abnormal; the maintenance power supply subsystem is used to provide maintenance circuits and power to the 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.

[0043] Furthermore, the control subsystem includes: a gas detector 22, a first valve 18, a second valve 19, a power detector 14, a control center 9, a display panel 8, a battery pack 10, a first switch 24, a second switch 23, a third switch 25, a fourth switch 26, a control center 9, a display panel 8 and an audible and visual alarm 32. The control center 9 is connected to the display panel 8 and the audible and visual alarm 32, and the gas detector 22 and the power detector 14 are connected to a signal acquisition end. The gas detector 22 detects the hydrogen concentration in the box to control the sound and stop of the audible and visual alarm 32; the power detector 14 detects the actual power at the load end to control the on and off of the first valve 18 and the second valve 19.

[0044] The main power supply subsystem includes: a mains terminal 1, a first filter 2, a rectifier 3, a first inverter 4, a second filter 5, an input terminal A of a first static switch 6, an output terminal of the first static switch 6, a fifth switch 27 and a load system; wherein, the mains terminal 1 electrically connects the first filter 2, the rectifier 3, the first inverter 4 and the second filter 5 in series in sequence, and finally connects to the input terminal A of the first static switch 6, and then electrically connects the output terminal of the first static switch 6, the fifth switch 27 and the load system in sequence.

[0045] The bypass power supply subsystem includes: a mains terminal 1, a first switch 24, a first filter 2, an input terminal B of a first static switch 6, an output terminal of the first static switch 6, a fifth switch 27, a second inverter 11, a third filter 12, an input terminal A of a second static switch 13 and a load system; wherein, the mains terminal 1, the first switch 24, the first filter 2, and the input terminal B of the first static switch 6 are electrically connected, and then the output terminal of the first static switch 6, the fifth switch 27, and the load system are electrically connected in sequence.

[0046] The maintenance power supply subsystem comprises: a mains terminal 1, a second switch 23 and a load system; wherein the mains terminal 1, the second switch 23 and the load system are electrically connected in sequence.

[0047] The hydrogen fuel supply subsystem includes: a fuel cell 15, a DC transformer 16, a three-way connector 17, a first valve 18, a second valve 19, a hydrogen bottle 20, a backup gas source 21, and an input terminal A of a first static switch 6; wherein the fuel cell 15 is connected to the first valve 18 and the second valve 19 via the three-way connector 17, the first valve 18 is connected to the hydrogen bottle 20, and the second valve 19 is connected to the backup gas source 21.

[0048] The battery pack power supply subsystem includes: a battery pack 10, a first inverter 4, a second inverter 11, a second filter 5, a third filter 12, a third switch 25, a fourth switch 26 and an input end A of a second static switch 13; wherein the battery pack 10 is connected to the rectifier 3, the DC transformer 16, the first inverter 4, the second inverter 11 and the control center 9 through the third switch 25 and the fourth switch 26.

[0049] Furthermore, the batteries in the battery pack 10 are lithium iron phosphate batteries, lead-acid batteries, or ternary lithium batteries.

[0050] The first valve 18 and the second valve 19 can be other valves such as ball valves, solenoid valves, and diaphragm valves.

[0051] The battery pack directly supplies power to the control center 9, the display panel 8, the power detector 14, the gas detector 22 and the like.

[0052] Furthermore, the specific working conditions of the emergency power supply system include:

[0053] When the AC power is supplied normally, the AC power terminal 1 sequentially passes through the first filter 2, the rectifier 3, the first inverter 4, the second filter 5, the input terminal A of the first static switch 6, the output terminal of the first static switch 6 and the fifth switch 27 to provide power to the load system and charge the battery pack 10 at the same time.

[0054] When the mains power is normally supplied and the internal electrical system is abnormal, when the first internal electrical system is abnormal: that is, the rectifier 3, the first filter 2 or the second filter 5 is damaged;

[0055] The mains terminal 1 provides power to the load system through the first switch 24, the first filter 2, the input terminal B of the first static switch 6, the output terminal of the first static switch 6 and the fifth switch 27, and charges the battery pack 10 through the rectifier 3. At the same time, the display panel 8 displays the current working line and abnormal line status, and the sound and light alarm 32 starts working.

[0056] When the second internal electrical abnormality occurs, that is, the first static switch 6 is damaged, the mains terminal 1 provides power to the load system through the first filter 2, the rectifier 3, the second inverter 11, the third filter 12, and the input terminal A of the second static switch 13, and charges the battery pack 10. At the same time, the display panel 8 displays the current working line and abnormal line status, and the sound and light alarm 32 starts to work.

[0057] Furthermore, the mains power abnormality includes: when the mains power is abnormal and the load system only needs to be powered off for a short time and when the mains power is abnormal and the load system must be powered on for a long time.

[0058] When the mains power is abnormal and the load system only needs a short power outage, the battery pack 10 supplies power to the load system through the first inverter 4, the second filter 5, and the input terminal A of the first static switch 6; at the same time, the display panel 8 displays the current working line and abnormal line status, and the sound and light alarm 32 starts working.

[0059] When the mains power is abnormal and the load system must be powered for a long time, that is, when the power of the battery pack 10 is less than half, the first valve 18 is opened, the fuel cell 15 is started, and the load system is provided with long-term power through the DC transformer 16, the first inverter 4, the second filter 5 and the input terminal A of the first static switch 6. At the same time, the display panel 8 displays the current working line and abnormal line status, and the sound and light alarm 32 starts to work.

[0060] When the mains power is abnormal, and the first inverter 4, the second filter 5 and the input terminal A of the first static switch 6 are damaged, the battery pack 10 supplies power to the load system through the second inverter 11, the third filter 12 and the input terminal A of the second static switch 13. When the power of the battery pack 10 is less than half, the first valve 18 is opened, the fuel cell 15 is started, and the load system is provided with power for a long time through the DC transformer 16, the first inverter 4, the second filter 5 and the input terminal A of the first static switch 6. At the same time, the display panel 8 displays the current working line and abnormal line status, and the sound and light alarm 32 starts to work.

[0061] Furthermore, the working condition of the emergency power supply system also includes that the first filter 2 is damaged when the mains power is normally supplied, and its working condition is the same as the working condition when the mains power is abnormal, specifically:

[0062] When the mains supply is normal and the first filter 2 is damaged, the battery pack 10 supplies power to the load system through the first inverter 4, the second filter 5, and the input terminal A of the first static switch 6; when the power of the battery pack 10 is less than half, the first valve 18 is opened, the fuel cell 15 is started, and the load system is provided with long-term power through the DC transformer 16, the first inverter 4, the second filter 5 and the input terminal A of the first static switch 6. At the same time, the display panel 8 displays the current working line and abnormal line status, and the sound and light alarm 32 starts to work.

[0063] And when the mains power is normally supplied and the first filter 2 is damaged, and the first inverter 4, the second filter 5 and the input terminal A of the first static switch 6 are damaged, the battery pack 10 supplies power to the load system through the second inverter 11, the third filter 12, and the input terminal A of the second static switch 13. When the power of the battery pack 10 is less than half, the first valve 18 is opened, the fuel cell 15 is started, and the load system is provided with power for a long time through the DC transformer 16, the first inverter 4, the second filter 5 and the input terminal A of the first static switch 6. At the same time, the display panel 8 displays the current working line and abnormal line status, and the sound and light alarm 32 starts to work.

[0064] Furthermore, the second switch 23 can be closed to use the maintenance circuit of the maintenance power supply electronic system for power supply, and the fifth switch 27 can be opened. At this time, the electrical components inside the device can be inspected and replaced. After the repair, the fifth switch 27 is closed and the second switch 23 is opened.

[0065] The above are only preferred specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. An emergency power supply system based on hydrogen fuel cells, It is characterized in that Including: main power supply subsystem, bypass power supply subsystem, maintenance power supply subsystem, battery pack power supply subsystem, hydrogen fuel cell power supply subsystem, control subsystem and load system; The main power supply subsystem is used to: provide power to the load system when the mains power is normally supplied; The bypass power supply subsystem is used to: provide power to the load system when the mains power supply is normal and the internal electrical system is abnormal; The battery pack power supply subsystem and the hydrogen fuel cell power supply subsystem are both used to: provide power to the load system when the mains power is abnormal; The maintenance power supply subsystem is used to: provide a maintenance circuit to provide power to the load system; The control subsystem is used to: control the working line of the emergency power supply system and monitor the operating status of the emergency power supply system; The control subsystem comprises: a gas detector (22), a first valve (18), a second valve (19), a power detector (14), a control center (9), a display panel (8), a battery pack (10), a first switch (24), a second switch (23), a third switch (25), a fourth switch (26), a control center (9), a display panel (8) and an audible and visual alarm (32); The main power supply subsystem comprises: a mains power end (1), a first filter (2), a rectifier (3), a first inverter (4), a second filter (5), an input end A of a first static switch (6), an output end of the first static switch (6), a fifth switch (27) and the load system connected in sequence; wherein the mains power end (1) sequentially electrically connects the first filter (2), the rectifier (3), the first inverter (4) and the second filter (5) in series, connects to the input end A of the first static switch (6), and then sequentially electrically connects the output end of the first static switch (6), the fifth switch (27) and the load system; The bypass power supply subsystem comprises: a mains terminal (1), a first switch (24), a first filter (2), an input terminal B of a first static switch (6), an output terminal of the first static switch (6), a fifth switch (27), a second inverter (11), a third filter (12), an input terminal A of the second static switch (13), and the load system; wherein the mains terminal (1), the first switch (24), the first filter (2), and the input terminal B of the first static switch (6) are electrically connected, and then the output terminal of the first static switch (6), the fifth switch (27), and the load system are electrically connected in sequence; The maintenance power supply subsystem comprises: a mains power terminal (1), a second switch (23) and the load system connected in sequence; The hydrogen fuel cell power supply subsystem comprises: a fuel cell (15), a DC transformer (16), a three-way connector (17), a first valve (18), a second valve (19), a hydrogen bottle (20), a backup gas source (21), and an input end A of a first static switch (6); wherein the fuel cell (15) is connected to the first valve (18) and the second valve (19) via the three-way connector (17), the first valve (18) is connected to the hydrogen bottle (20), and the second valve (19) is connected to the backup gas source (21); The battery pack power supply subsystem comprises: a battery pack (10), a first inverter (4), a second inverter (11), a second filter (5), a third filter (12) and an input end A of a second static switch (13); wherein the battery pack (10) is connected to a rectifier (3), a DC transformer (16), a first inverter (4), a second inverter (11) and a control center (9) via a third switch (25) and a fourth switch (26).

2. The hydrogen fuel cell-based emergency power supply system according to claim 1, It is characterized in that When the mains power is supplied normally, the mains power end (1) sequentially passes through the first filter (2), the rectifier (3), the first inverter (4), the second filter (5), the input end A of the first static switch (6), the output end of the first static switch (6) and the fifth switch (27) to provide power to the load system and charge the battery pack (10) at the same time.

3. The hydrogen fuel cell-based emergency power supply system according to claim 1, It is characterized in that The internal electrical abnormality includes: a first internal electrical abnormality and a second internal electrical abnormality; The first internal electrical abnormality is: the rectifier (3), the first filter (2) or the second filter (5) is damaged; The second internal electrical abnormality is that the first static switch (6) is damaged.

4. The hydrogen fuel cell-based emergency power supply system according to claim 3, It is characterized in that When the mains power supply is normal and the first internal electrical system is abnormal, the mains power end (1) provides power to the load system through the first switch (24), the first filter (2), the input end B of the first static switch (6), the output end of the first static switch (6) and the fifth switch (27), and charges the battery pack (10) through the rectifier (3).

5. The hydrogen fuel cell-based emergency power supply system according to claim 3, It is characterized in that When the mains power is supplied normally and the second internal electrical system is abnormal, the mains power end (1) provides power to the load system through the first filter (2), the rectifier (3), the second inverter (11), the third filter (12), and the input end A of the second static switch (13), and charges the battery pack (10) at the same time.

6. The hydrogen fuel cell-based emergency power supply system according to claim 1, It is characterized in that The mains power abnormality includes: when the mains power is abnormal and the load system only needs a short power outage and when the mains power is abnormal and the load system must be powered on for a long time.

7. The hydrogen fuel cell-based emergency power supply system according to claim 1, It is characterized in that When the mains power is abnormal and the load system only needs to be powered off for a short time, the battery pack (10) supplies power to the load system through the first inverter (4), the second filter (5), and the input terminal A of the first static switch (6); When the mains power is abnormal and the load system must be powered for a long time, that is, when the power level of the battery pack (10) is less than half, the first valve (18) is opened, the fuel cell (15) is started, and the load system is provided with power for a long time through the DC transformer (16), the first inverter (4), the second filter (5) and the input terminal A of the first static switch (6).

8. The hydrogen fuel cell-based emergency power supply system according to claim 7, It is characterized in that When the mains power is abnormal and the first inverter (4), the second filter (5) and the input terminal A of the first static switch (6) are damaged, the battery pack (10) supplies power to the load system through the second inverter (11), the third filter (12) and the input terminal A of the second static switch (13); when the power level of the battery pack (10) is less than half, the first valve (18) is opened, the fuel cell (15) is started, and long-term power is provided to the load system through the DC transformer (16), the first inverter (4), the second filter (5) and the input terminal A of the first static switch (6).

9. The hydrogen fuel cell-based emergency power supply system according to claim 1, It is characterized in that The display panel (8) is used to display the current working circuit and abnormal working status, and when an abnormality occurs, the sound and light alarm (32) will sound an alarm.

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