CN218827276U - Fuel cell power supply system - Google Patents
Fuel cell power supply system Download PDFInfo
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- CN218827276U CN218827276U CN202223032060.0U CN202223032060U CN218827276U CN 218827276 U CN218827276 U CN 218827276U CN 202223032060 U CN202223032060 U CN 202223032060U CN 218827276 U CN218827276 U CN 218827276U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/30—Hydrogen technology
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Abstract
The application provides a fuel cell power supply system, which comprises a first energy source, a second energy source, a third energy source and a control unit. The first energy source comprises: liquid fuel storage device, pure water manufacturing installation, reformer and hydrogen purification device, wherein, liquid fuel storage device includes the methyl alcohol holding vessel, and its storage has methyl alcohol, and the pure water manufacturing installation is connected with water supply, reformer respectively with the pure water manufacturing installation liquid fuel storage device and air source are connected, are used for utilizing the methyl alcohol aqueous solution and the air of methyl alcohol make the raw hydrogen, hydrogen purification device with reformer's raw hydrogen exit linkage, be used for with the product hydrogen is obtained in the purification of raw hydrogen. Through the application, the fuel can be conveniently stored and transported, and hydrogen energy power generation is carried out in a low-cost mode.
Description
Technical Field
The invention relates to the field of hydrogen energy, in particular to a fuel cell power supply system.
Background
At present, in a hydrogen fuel cell power generation system, a high-pressure hydrogen cylinder is used to store hydrogen, and during power generation, the hydrogen stored in the high-pressure hydrogen cylinder is connected with a plurality of power generation unit cabinets in the power generation system through pipelines respectively, and the power generation unit cabinets supply hydrogen to a pile anode through a proportion valve and a hydrogen circulating pump configured in the power generation unit cabinets.
As hydrogen belongs to combustible and explosive gas, once leakage happens to the high-pressure hydrogen storage cylinder, fire or explosion can be caused; the volume of the hydrogen is large, the transportation is difficult, the storage and the transportation of the hydrogen are difficult due to the limitation of traffic and environment; in addition, the cost of hydrogen power generation is high.
Therefore, there is a need for a hydrogen fuel cell power generation system that is convenient to store and transport and that is low in cost.
Disclosure of Invention
In view of the above, the present invention provides a fuel cell power supply system, which uses methanol as fuel, and when hydrogen needs to be prepared and electric energy needs to be generated, a control system generates hydrogen and uses the electric energy generated by the fuel cell to supply power to a load, compared with the conventional high-pressure storage of hydrogen, the system has the advantages of higher safety, easier transportation, smaller fuel storage space and lower power generation cost.
The fuel cell power supply system includes: a first energy source, comprising: liquid fuel storage device, pure water manufacturing installation, reforming unit and hydrogen purification device, wherein, liquid fuel storage device includes the methyl alcohol holding vessel, and its storage has methyl alcohol, and pure water manufacturing installation is connected with water source, reforming unit respectively with pure water manufacturing installation liquid fuel storage device and air source are connected for utilize the methyl alcohol aqueous solution and the empty air of methyl alcoholThe hydrogen purification device is connected with a crude hydrogen outlet of the reforming device and is used for purifying the crude hydrogen to obtain product hydrogen, wherein the crude hydrogen comprises: CO2, CO, H 2 O and H 2 The product hydrogen comprises: h 2 More than or equal to 99.97 percent and CO less than or equal to 1ppm; a second energy source connected to the first energy source for producing direct current electrical energy from the product hydrogen; a third energy source connected to the second energy source for converting the dc electrical energy into ac electrical energy; and the control unit is connected with the first energy source, the second energy source and the third energy source and is used for controlling the first energy source, the second energy source and the third energy source according to the power consumption of the load. Wherein H 2 99.97% or more means volume percentage.
The methanol is used as the fuel, so that the fuel can be conveniently stored and transported, hydrogen can be generated only when the system operates, the hydrogen source can be cut off at any time, and compared with the traditional high-pressure storage of hydrogen, the high-pressure storage of hydrogen has higher safety and lower cost; specifically, the volume of 1kg of methanol is 1.266L, 1400L of hydrogen can be generated through the reforming reaction, the transportation is easier, and the fuel storage space is smaller; the current methanol price is 2200 yuan/t, calculated according to 15KWH of 1kg hydrogen power generation, the hydrogen storage power generation is 4.66 yuan/kWH, and the methanol reforming power generation cost is lower when the methanol reforming power generation is 1.17 yuan/kWH; when hydrogen preparation is needed, the hydrogen generator can be used as a standby power supply to meet the requirements of seamless switching and continuous load power supply.
In a possible implementation manner, the hydrogen purification device comprises a cooling and gas-water separation device and an adsorption device, wherein the crude hydrogen outlet of the reforming device is connected with the inlet of the cooling and gas-water separation device, the outlet of the cooling and gas-water separation device is connected with the inlet of the adsorption device, the first outlet of the adsorption device is connected with the reforming device and used for taking the waste hydrogen as a heat supply source of the reforming device, and the second outlet of the adsorption device is connected with the second energy source.
Through the arrangement, the waste hydrogen generated by the adsorption device can be used for heat supply of reforming reaction, and the utilization rate of the hydrogen is improved.
In a possible implementation manner, the system further comprises a power storage battery which is respectively connected with the second energy source and the control unit.
Through the arrangement, the requirement of electric energy in the starting process of the system can be met.
In one possible implementation, the third energy source includes: the high-voltage distribution box comprises a high-voltage distribution box, an AC/DC device and a DC/AC device, wherein a first end of the AC/DC device is connected with 380V alternating current, a second end of the AC/DC device is connected with the first end of the high-voltage distribution box, a second end of the high-voltage distribution box is connected with the first energy source, a third end of the high-voltage distribution box is connected with the first end of the DC/AC device, and the second end of the DC/AC device outputs 380V alternating current to a load.
Through the arrangement, direct current of a system can be converted into alternating current for a load to use.
In one possible implementation, the second energy source includes: a plurality of fuel cells coupled to the reformer, and a DC/DC device coupled to the fuel cells, the DC/DC device coupled to the third energy source.
In one possible implementation, the second energy source further includes: and the first water supplementing tank and the first heat dissipation system as well as the second water supplementing tank and the second heat dissipation system are connected with the fuel cell.
In one possible implementation manner, the system further comprises a methanol aqueous solution manufacturing device, an inlet of the methanol aqueous solution manufacturing device is connected with the pure water manufacturing device and the liquid fuel storage device respectively, and an outlet of the methanol aqueous solution manufacturing device is connected with the reforming device.
In one possible implementation, the fuel cell includes 3 groups.
Through the setting, the output can be carried out in a grading way according to the mode required by the user, the working efficiency of the system can be improved, and the reliability of the system is improved.
Drawings
The various technical features of the present application and the relationships between them are further explained below with reference to the drawings. The drawings are exemplary, some technical features are not shown in actual scale, and some technical features that are commonly used in the technical field of the present application and are not essential to understanding and implementing the present application may be omitted or additionally shown, that is, the combination of the technical features shown in the drawings is not used for limiting the present application. In addition, the same reference numerals are used throughout the application. The specific drawings are illustrated as follows:
fig. 1 is a schematic structural diagram of a power supply system provided in an embodiment of the present application;
fig. 2 is a schematic structural diagram of a first energy source of a power supply system provided by an embodiment of the present application;
FIG. 3 is a schematic diagram of energy conversion of a power supply system provided by an embodiment of the application;
fig. 4 is a schematic structural diagram of an association between an energy management unit of a power supply system and an external system according to an embodiment of the present application;
fig. 5 is a schematic diagram of a high-voltage circuit of a power supply system provided in an embodiment of the present application.
Detailed Description
Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.
Fig. 1 is a schematic structural diagram of a power supply system provided in an embodiment of the present application, and as shown in fig. 1, the power supply system provided in the embodiment of the present application includes a first energy source 100, a second energy source 200, a third energy source 300, and a control unit 400, where the first energy source 100 is connected to the second energy source 200, the second energy source 200 is connected to the third energy source 300, and the control unit 400 is connected to the first energy source 100, the second energy source 200, and the third energy source 300, respectively.
As shown in fig. 1, a first energy source 100 is used to produce a gaseous fuel from a liquid fuel (methanol); the second energy source 200 is used to produce direct current electricity using the gaseous fuel produced by the first energy source; the third energy source 300 is configured to convert the direct current generated by the second energy source into alternating current, and the control unit 400 is configured to control the first energy source to generate gas fuel according to the load, control the second energy source 200 to generate direct current using the gas fuel, and control the third energy source 300 to convert the direct current into alternating current. Wherein, a second energy source 200 is connected to the first energy source 100 for generating direct current electric energy by using the gas fuel. A third energy source 300 is connected to the second energy source 200 for converting the dc power into ac power.
Fig. 3 illustrates a flow of energy conversion of the power supply system provided by the embodiment of the present application, and as shown in fig. 3, the power supply system provided by the embodiment of the present application sequentially converts liquid fuel into gas fuel, direct current, and alternating current for a load. When the load needs electric energy, methanol and deionized water stored in a methanol storage device are used for generating a methanol aqueous solution, the methanol and air are introduced into a methanol reforming device to generate crude hydrogen, and the crude hydrogen is purified to obtain a product hydrogen (namely a gas fuel); introducing the product hydrogen into a fuel cell to obtain direct current; the direct current is converted into alternating current for the load to use. Compared with the method for preparing hydrogen by directly utilizing hydrogen, the method for preparing hydrogen by using methanol as fuel has the advantages that the methanol is easier to store, a high-pressure hydrogen storage device is not needed, and the safety is improved; compared with the storage space and the transportation difficulty of hydrogen, the storage space of methanol is small, and the transportation is easier.
As shown in fig. 1 and 2, the first energy source 100 includes: a liquid fuel storage device 10, a pure water manufacturing device 11, a reforming device 12 and a hydrogen purification device 13, wherein the liquid fuel storage device 10 comprises a methanol storage tank which stores methanol, and the pure water manufacturing device 11 is connected with a tap water source and is used for generating deionized water. The reformer 12 is connected to the pure water producing device 11, the liquid fuel storage device 10, and an air source, and produces a raw hydrogen gas using the methanol aqueous solution of methanol and air. The hydrogen purification device 13 is connected to the reforming device 12, and is configured to purify the crude hydrogen to obtain product hydrogen, where the crude hydrogen includes: CO2, CO, H 2 O and H 2 The product hydrogen comprises: h 2 ≥99％In particular, H 2 More than or equal to 99.97 percent and CO less than or equal to 1ppm. Wherein H 2 99.97% or more means volume percentage.
As shown in fig. 2, the hydrogen purification apparatus 13 may include: cooling and gas-water separation device 131 and adsorption equipment, adsorption equipment can be adsorption tower 132, reforming unit 12's crude hydrogen export with cooling and gas-water separation device 131's entry linkage, cooling and gas-water separation device 131's export with the entry linkage of adsorption tower 132, the first export of adsorption tower 132 with reforming unit 12 is connected for use the heat supply of hydrogen waste for reforming unit, the second export of adsorption tower 132 with the second energy source is connected for regard to hydrogen waste as reforming unit's heat supply source. During operation, the crude hydrogen of the reforming device 12 is introduced into the cooling and gas-water separation device 131 for cooling and gas-water separation, wherein the cooling can be air-cooled and/or water-cooled, the liquid is discharged out of the cooling and gas-water separation device, the gas enters the pressure swing adsorption tower 132 through the inlet of the adsorption tower 132 for hydrogen purification, then the obtained product hydrogen (also called pure hydrogen) is supplied to the fuel cell system, and the rest waste hydrogen is sent into the reforming device 12 for heat supply of the reforming reaction.
The first energy source can be methanol hydrogen production equipment, the rated hydrogen production amount of the equipment is 240m3/h, the maximum hydrogen production amount is 260m3/h, the maximum methanol flow is 288kg/h, the rated power consumption is 25kW @ AC380V/AC220V/DC24V, the power is 25kW, and the voltage of each load is AC380V, AC220V and DC24V respectively; the maximum power consumption is 25kW @ AC380V/AC220V/DC24V, wherein the power is 25kW, and the voltage of each load is AC380V, AC220V and DC24V respectively.
When hydrogen needs to be prepared, deionized water produced by a methanol and pure water production device is used, and the deionized water and methanol in the liquid fuel storage device are prepared into a methanol aqueous solution, optionally, a methanol aqueous solution production device 14 can be arranged to obtain a methanol aqueous solution, and the methanol aqueous solution is used as a raw material for reforming hydrogen production; the methanol storage unit (methanol tank 10) is fed to the reformer 12 through a methanol pump for reaction with air to supply heat to the reformer; the methanol water solution enters the reforming device 12 after being preheated, crude hydrogen is generated under the conditions of preset temperature and preset pressure, and the flue gas generated after the reaction of methanol and air is discharged from the reforming device 12 together with ventilated air after heat exchange; hydrogen generated by the reforming device 12 is conveyed to a cooling and gas-water separation device 131, and is cooled and gas-water separated in an air cooling or water cooling mode to obtain crude hydrogen; the crude hydrogen is fed to the cooling and gas-water separation device 131 and the adsorption tower 132 of the hydrogen purification device 13 for purification to obtain product hydrogen, and a small amount of waste hydrogen generated in the re-purification process of the hydrogen purification device 13 is fed to the burner of the reforming device 12 for supplying heat to the reforming device. The safety performance of the system can be improved by omitting a high-pressure hydrogen storage device; in addition, the methanol occupies small area and is convenient to transport; the power generation cost of the hydrogen is high, and the power generation cost of the power generation system provided by the application is low.
As shown in fig. 1, the second energy source 200 includes: a plurality of fuel cells, a DC/DC device connected to the fuel cells, a first make-up water tank and a first heat dissipation system (i.e., a primary heat dissipation system) connected to the fuel cells, and a second make-up water tank and a second heat dissipation system (i.e., a secondary radiator). The fuel cell is coupled to the reformer, and the DC/DC device is coupled to the third energy source. In some embodiments, the second energy source may be a G110 fuel cell system rated at 315Kw, peak power of 330kW, output voltage of DC400V to DC750V, and maximum hydrogen consumption of 5.8G/s. The total output power of the electric pile of the 3 sets of G110 fuel cell systems can reach 330kW, when the hydrogen supply amount is 232m3, the net output power of the fuel cell systems can reach 305kW, the internal power consumption (actually measured about 50kW at the maximum) of 65kW fuel cell systems is deducted, and the external output power of the fuel cell systems can reach 240kW. The corresponding demand requirement output power is divided into 2 grades, 120kW and 240kW, and the peak power output 264kW, wherein 3 sets of fuel cell systems can meet the application scene output power demand.
As shown in fig. 1, the third energy source 300 includes: the high-voltage distribution box comprises a high-voltage distribution box, an AC/DC device and a DC/AC device, wherein a first end of the AC/DC device is connected with 380V alternating current, a second end of the AC/DC device is connected with the first end of the high-voltage distribution box, a second end of the high-voltage distribution box is connected with the first energy source, a third end of the high-voltage distribution box is connected with the first end of the DC/AC device, and the second end of the DC/AC device outputs 380V alternating current to a load. The UPS system is used for a double-conversion online uninterrupted power system for sine wave output and provides a power supply system for power supply without power grid interference, voltage stabilization and frequency stabilization for loads. When the commercial power is cut off, the UPS system outputs the energy of the fuel battery and the power battery to the load by inversion, thereby realizing uninterrupted output.
As shown in fig. 4, the UPS power system is connected to a commercial power and a load, and is used for a double-conversion online UPS system outputting sine waves, and a power system supplying power to the load without grid interference, voltage stabilization, and frequency stabilization. When the mains supply is powered off, the UPS inverts and outputs the energy of the fuel battery and the power battery to the load, and uninterrupted output is achieved. The UPS includes: the UPS system comprises a lithium iron phosphate battery pack and a high-low voltage distribution box, wherein the lithium iron phosphate battery pack is used as one of energy storage units of the UPS system, is characterized by safety, long service life, good high-temperature performance, light weight, no memory effect and the like, has certain instantaneous large-current discharge capacity, and has the main functions of meeting the short-time power utilization of a high-power load and improving the emergency guarantee capacity of the UPS system, the power supply in the system starting process and the stability of the system power supply. The high-low voltage distribution box comprises a confluence distribution box, an alternating current distribution box and a low-voltage control cabinet, wherein the confluence distribution box is only used for confluence of a UPS front end, a fuel cell DC/DC and a power battery system and for auxiliary 24VDC/DC installation; the AC distribution box mainly realizes the distribution of 380V AC output by the rear end of the UPS; the low-voltage control cabinet is responsible for power supply distribution of user loads and other DC24V loads in the system and is used for the communication conversion module and the central control unit.
As shown in fig. 1, the system further comprises a power accumulator connected to the second energy source and the control unit, respectively. For supplying electrical energy to the system during start-up of the system.
In some embodiments, the primary heat sink system and/or the secondary heat sink comprises: an evaporative cooling tower radiator comprises a shell, a fan arranged on the shell, a spray head arranged below the fan and a coil arranged below spraying. Working fluid circulates in the coil pipe, and heat of the working fluid is dissipated into a water film sprayed on the surface of the coil pipe through the coil pipe. Meanwhile, air around the outside of the unit enters from the air inlet grille at the bottom of the tower, flows upwards through the coil pipe in a direction opposite to the flowing main direction of water. A small portion of the water evaporates to absorb heat, and the hot humid air is exhausted to the atmosphere by an exhaust fan at the top of the cooling tower. The remaining water falls into a bottom water tank, is recirculated to the water distribution system by a water pump and is sprayed onto the coil.
As shown in fig. 1, the control unit 400 includes an energy management unit (ECU) for controlling and managing the first energy source, the second energy source, the third energy source, the power battery, the UPS system, and other components, and implementing communication and control through an HMI display screen to achieve the output power of the stationary hydrogen fuel power generation system to meet the power required by the load operation.
Fig. 4 shows an associated structure of an energy management unit of a power supply system and an external system provided in an embodiment of the present application. The energy management unit is respectively connected with a hydrogen production system (namely a first energy source), a hydrogen fuel cell system (a second energy source), an auxiliary DC/DC, a UPS system and an Ethernet switch, an industrial personal computer and an HMI (human machine interface) are connected with the Ethernet switch through ETH (extract transform), a power battery is connected with a communication switch and the Ethernet switch, a switch control period and a relay state are connected with the energy management unit, a screen cabinet is connected with the energy management unit, and a direct current collector, a three-phase current collector and a single-phase current collector are respectively connected with the UPS and the communication converter.
When the control system is powered on, the state of each device in the system is checked, and when one of the following conditions is met, the system is powered on: and (1) pressing a starting instruction button, and (2) powering down the mains supply. After the system is powered on, the hydrogen production system is started, the first energy source starts to produce hydrogen, and the hydrogen is output. The fuel cell system is then turned on and the cooling system is turned on based on the fuel cell problem with the fuel cell system. And finally, controlling the power of the fuel cell according to the SOC of the battery and the load power.
When the system is powered off, the state of each device in the system is checked, and when each device is powered offIn the absence of a fault, the system is powered down when one of the following conditions is met: (1) Pressing a shutdown instruction button (2) to recover commercial power, then controlling the output of the fuel cell to enable the SOC to reach 90%, setting the hydrogen production amount of the hydrogen production system to be 0, adjusting the power of the fuel cell according to the real-time hydrogen production amount, and setting the hydrogen production amount to be 1NM 3 And when the hydrogen production system is shut down, the fuel cell is shut down, and the cooling system is shut down. When a 3-level fault occurs, setting the hydrogen production amount of the hydrogen production system to be 0, and adjusting the power of the fuel cell according to the real-time hydrogen production amount, wherein the hydrogen production amount is 1NM 3 And when the pressure is in the range of the first pressure, the hydrogen production system is shut down, the fuel cell is shut down, and the cooling system is shut down. When the system has a 4-level fault or the emergency button is pressed, the hydrogen production system is emergently shut down, the fuel cell is emergently shut down, and the cooling system is emergently shut down.
The fault grade is 4 grades, the 1 grade fault refers to a hydrogen production system or a cooling 1 grade fault or excessive temperature of a busbar, ECU fault guidance is no treatment, and fault information is displayed; the 2-level fault refers to that the hydrogen production system or the cooling or FCU subsystem or the two hydrogen concentration sensors exceed the 2-level, the ECU fault is guided to be non-processed, fault information is displayed, if the FCU has more than 2-level faults, the quota is reduced, and the fault of other systems does not reduce the quota; the 3-level fault refers to that the hydrogen production system or the FCU subsystem or two hydrogen concentration sensors exceed the 3-level or the BMS serious fault or the communication fault of a communication manager or smoke alarm or fire control or fire, and the ECU fault is guided to shut down the whole system; the 4-level fault is that the hydrogen production system or the FCU subsystem or two hydrogen concentration sensors exceed the standard of 4 levels, and the ECU fault is used for guiding the whole system to be shut down.
Fig. 5 is a schematic diagram of a high-voltage circuit of a power supply system provided in an embodiment of the present application, where a solid line represents direct current and a dashed line represents alternating current. The fuel cell, the DC/DC, the high-voltage confluence cabinet and the UPS are respectively and electrically connected through alternating current, the DC/DC and the BOP are electrically connected through direct current, the energy storage cell is respectively and electrically connected with the high-voltage confluence cabinet and the 24VDC/DC through direct current, and the alternating current power distribution cabinet is respectively and electrically connected with the UPS, the cooling tower and the methanol reforming hydrogen production system (namely a first energy source) through alternating current.
As shown in fig. 5, in the energy conversion, the electric power generated by the fuel cell system is supplied to the UPS system and the power battery, respectively, via the DC/DC converter, and the UPS supplies the electric power to the load. The output power value of the fuel cell after DC/DC is calculated by the following formula:
Pfc＝Vfc×Ifc
vfc denotes a voltage of the fuel cell, ifc denotes a current of the fuel cell, and Pfc denotes an output power value of the fuel cell after DC/DC.
The power of the power battery, pbat, is calculated by the following equation:
Pbat＝Vbat×Ibat
vbat represents the voltage of the power battery, ibat represents the current of the power battery, when Pbat is less than 0, vbat is greater than 0, ibat is less than 0, the power battery is in a charging state, and Pbat represents the power of the power battery.
Pbatmax = Vbat × Ibatmax. Pbatmax represents the power limit value of the power battery, ibatmax represents the maximum charge and discharge current of the power battery, and when Pbat is greater than 0, vbat is greater than 0, and Ibat is greater than 0, the power battery is in a discharge state.
The system power is calculated by the following formula:
Pfc+Pbat＝PLd/η(η＝0.95)
pbat represents the power of the power battery, and PLD represents the power of the load connected with the UPS; the fuel cell has three electric stacks, and the output power of each electric stack is as follows: pdc/n (n stacks are normal).
Unless defined otherwise, all technical and scientific terms used throughout this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. In the event of inconsistencies, the meanings explained throughout this application or those derived from the content reported throughout this application shall prevail. In addition, the terminology used in the description is for the purpose of describing the embodiments of the present application only and is not intended to be limiting of the present application.
The use of the terms first, second, third, etc. or the like for modules a, B, C, etc. throughout this application are used solely to distinguish one from another and not to imply a particular order to the objects, it being understood that specific orders or sequences may be interchanged where permitted.
The term "comprising" as used throughout this application should not be construed as being limited to the contents listed thereafter; it does not exclude other structural elements or steps. It should therefore be interpreted as specifying the presence of the stated features, integers, steps or components as referred to, but does not preclude the presence or addition of one or more other features, integers, steps or components, and groups thereof.
It is to be understood that features mentioned in one or more of the embodiments throughout this application may be combined in any suitable manner with features of other embodiments by one skilled in the art to practice the present application.
It should be noted that the foregoing is only illustrative of the preferred embodiments of the present application and the technical principles employed. Those skilled in the art will appreciate that the present application is not limited to the particular embodiments described herein, but is capable of many obvious modifications, rearrangements and substitutions without departing from the scope of the application. Therefore, although the present application is described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the technical concept of the present application.
Claims (8)
1. A fuel cell power supply system is characterized by comprising
A first energy source, comprising: a liquid fuel storage device, a pure water production device, a reforming device, and a hydrogen purification device,
the liquid fuel storage device comprises a methanol storage tank, the methanol storage tank is used for storing methanol, the pure water manufacturing device is connected with a tap water source, the reforming device is respectively connected with the pure water manufacturing device, the liquid fuel storage device and an air source and is used for manufacturing crude hydrogen by using methanol water solution of the methanol and air, and the hydrogen purification device is connected with a crude hydrogen outlet of the reforming device and is used for purifying the crude hydrogen to obtain product hydrogen;
a second energy source connected to the first energy source for producing direct current electrical energy from the product hydrogen;
a third energy source connected to the second energy source for converting the dc electrical energy into ac electrical energy;
and the control unit is connected with the first energy source, the second energy source and the third energy source and is used for controlling the first energy source, the second energy source and the third energy source according to the power consumption of the load.
2. The power supply system according to claim 1, wherein the hydrogen purification device comprises a cooling and gas-water separation device and an adsorption device, the crude hydrogen outlet of the reforming device is connected with the inlet of the cooling and gas-water separation device, the outlet of the cooling and gas-water separation device is connected with the inlet of the adsorption device, the first outlet of the adsorption device is connected with the reforming device and used for taking waste hydrogen as a heat supply source of the reforming device, and the second outlet of the adsorption device is connected with the second energy source.
3. The power supply system of claim 1, further comprising a power battery connected to the second energy source and the control unit, respectively.
4. The power supply system of claim 1, wherein the third energy source comprises: the high-voltage distribution box comprises a high-voltage distribution box, an AC/DC device and a DC/AC device, wherein a first end of the AC/DC device is connected with 380V alternating current, a second end of the AC/DC device is connected with the first end of the high-voltage distribution box, a second end of the high-voltage distribution box is connected with the first energy source, a third end of the high-voltage distribution box is connected with the first end of the DC/AC device, and the second end of the DC/AC device outputs 380V alternating current to a load.
5. The power supply system of claim 1, wherein the second energy source comprises: a plurality of fuel cells coupled to the reformer, and a DC/DC device coupled to the fuel cells, the DC/DC device coupled to the third energy source.
6. The power supply system of claim 5, wherein the second energy source further comprises: and the first water replenishing tank and the first heat dissipation system, and the second water replenishing tank and the second heat dissipation system are connected with the fuel cell.
7. The power supply system of claim 5, wherein said second energy source comprises 3 groups of fuel cells.
8. The power supply system according to claim 1, further comprising a methanol aqueous solution production device, wherein an inlet of the methanol aqueous solution production device is connected to the pure water production device and the liquid fuel storage device, respectively, and an outlet of the methanol aqueous solution production device is connected to the reforming device.
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| CN202223032060.0U CN218827276U (en) | 2022-11-15 | 2022-11-15 | Fuel cell power supply system |
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