CN113352908A - Multi-energy intelligent power system - Google Patents

Multi-energy intelligent power system Download PDF

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Publication number
CN113352908A
CN113352908A CN202110820321.6A CN202110820321A CN113352908A CN 113352908 A CN113352908 A CN 113352908A CN 202110820321 A CN202110820321 A CN 202110820321A CN 113352908 A CN113352908 A CN 113352908A
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CN
China
Prior art keywords
lithium ion
battery pack
power
voltage converter
fuel cell
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Pending
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CN202110820321.6A
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Chinese (zh)
Inventor
芦晓民
陈全世
杨帅
刘清玉
刘中新
孟克其劳
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Inner Mongolia Beigong Heavy Machinery And Electrical Equipment Manufacturing Co ltd
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Inner Mongolia Beigong Heavy Machinery And Electrical Equipment Manufacturing Co ltd
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Priority to CN202110820321.6A priority Critical patent/CN113352908A/en
Publication of CN113352908A publication Critical patent/CN113352908A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/75—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using propulsion power supplied by both fuel cells and batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L1/00—Supplying electric power to auxiliary equipment of vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/53—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells in combination with an external power supply, e.g. from overhead contact lines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
    • B60L50/71—Arrangement of fuel cells within vehicles specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
    • B60L50/72—Constructional details of fuel cells specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
    • B60L53/20—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by converters located in the vehicle
    • B60L53/22—Constructional details or arrangements of charging converters specially adapted for charging electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/30—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/40—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61C—LOCOMOTIVES; MOTOR RAILCARS
    • B61C3/00—Electric locomotives or railcars
    • B61C3/02—Electric locomotives or railcars with electric accumulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L2200/00—Type of vehicles
    • B60L2200/26—Rail vehicles
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/72—Electric energy management in electromobility
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Fuel Cell (AREA)

Abstract

The invention discloses a multi-energy intelligent power system which is used for rail vehicles, energy storage and other scenes and comprises a pantograph, a voltage converter AC/DC, a lithium ion storage battery pack, a fuel cell system, a voltage converter DC/DC and a load system, wherein the pantograph is connected with a mains supply, the output end of the pantograph is connected with the lithium ion storage battery pack through the voltage converter AC/DC, the lithium ion storage battery pack is connected with the load system through a power line and supplies power for the load system, meanwhile, the voltage converter AC/DC is directly connected with the load system through a power line to supply power for the load system, and the fuel cell system is connected with the lithium ion storage battery pack and the load system through the voltage converter DC/DC to charge the lithium ion storage battery pack and supply power for the load system. The multi-energy intelligent power system monitors the states of the power sources in real time and adjusts the intervention and exit of the power system according to the real-time states of the power sources.

Description

Multi-energy intelligent power system
Technical Field
The invention relates to a power system of a rail vehicle, in particular to a multi-energy intelligent power system for supplying power to the rail vehicle.
Background
At present, rail vehicles are mainly internal combustion engine locomotives and electric locomotives. The internal combustion engine locomotive has the advantages of mature technology, convenient use and high safety; however, the internal combustion engine locomotive is powered by petrochemical energy, so that the environment is greatly influenced, and the maintenance cost is high. The electric locomotive is driven by electric power, and has the advantages of energy conservation, environmental protection, abundant power, low noise, simple maintenance, low use cost and the like; however, the electric locomotive has no power source, the electric energy comes from an external cable or an electric rail, and the electric locomotive is very dependent on the construction, operation and maintenance of the electrified railway, and transportation paralysis can be caused if natural disasters or power interruption occur.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide a multi-energy intelligent power system for rail transit.
In order to achieve the above object, the present invention provides a multi-energy intelligent power system for road vehicles, which comprises a pantograph, a voltage converter AC/DC, a lithium ion battery pack, a fuel cell system, a voltage converter DC/DC and a load system, wherein the pantograph is connected with a commercial power, the output end of the pantograph is connected with the voltage converter AC/DC through a power line, the voltage converter AC/DC is connected with the lithium ion battery pack through the power line, the lithium ion battery pack is connected with the load system through the power line and supplies power to the load system, meanwhile, the voltage converter AC/DC is directly connected with the load system through the power line to supply power to the load system, the fuel cell system is connected with the lithium ion battery pack and the load system through the voltage converter DC/DC, charging the lithium ion battery pack and supplying power to the load system.
The multi-energy intelligent power system comprises an intelligent monitoring unit, wherein the intelligent monitoring unit is respectively connected with the lithium ion storage battery pack, the voltage converter AC/DC and the fuel cell system, monitors the electric quantity of the lithium ion storage battery pack and controls the output state of the lithium ion storage battery pack, and the intelligent monitoring unit controls the work of the fuel cell system.
The lithium ion storage battery pack comprises a lithium ion storage battery and a battery management unit, the intelligent monitoring unit is connected with the battery management unit, and the battery management unit is used for monitoring the electric quantity of the lithium ion storage battery and controlling the charging and discharging of the lithium ion storage battery.
The load system is a road vehicle and comprises a motor control system, a variable-frequency permanent magnet synchronous motor and a road vehicle transmission system which are sequentially connected.
The fuel cell system comprises a hydrogen production device and a proton exchange membrane fuel cell, wherein the hydrogen production device produces high-purity hydrogen, and the intelligent monitoring unit controls the work of the proton exchange membrane fuel cell.
The hydrogen production device comprises at least one of a methanol reforming hydrogen production device, a solid hydrogen storage device and a high-pressure hydrogen storage bottle hydrogen storage device.
The road vehicle is a rail vehicle.
The multi-energy intelligent power system disclosed by the invention realizes intelligent combined application, fully exerts the advantages of each energy device, breaks through the limitation of a single energy device on the continuous mileage of a matched infrastructure, a rail vehicle, the maximum power of the power device and the service life, and improves the economy, convenience and adaptability of the rail vehicle. The multi-energy intelligent power system monitors the states of the power sources in real time and adjusts the intervention and exit of the power system according to the real-time states of the power sources.
Drawings
FIG. 1 is a block diagram of the multi-energy intelligent power system of the present invention;
FIG. 2 is a detailed schematic diagram of the multi-energy intelligent power system of the present invention;
FIG. 3 is a schematic diagram of a pantograph for simultaneously powering a lithium ion battery pack and a load system in accordance with the present invention;
FIG. 4 is a schematic diagram of a lithium ion battery pack for powering a load system according to the present invention;
FIG. 5 is a schematic diagram of a fuel cell system for powering a lithium ion battery pack and a load system in accordance with the present invention;
FIG. 6 is a flow chart of a process for producing hydrogen by a methanol reforming hydrogen production apparatus according to the present invention;
FIG. 7 is a schematic diagram of a solid-state hydrogen storage device according to the present invention;
FIG. 8 is a schematic view showing the structure of the hydrogen storage apparatus of the high-pressure hydrogen storage cylinder according to the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer and more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, it is obvious that the described embodiments are some, but not all, embodiments of the present invention, and the embodiments of the present invention are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.
As shown in figure 1, the multi-energy intelligent power system comprises a pantograph, a voltage converter AC/DC, a lithium ion storage battery pack, a fuel cell system, a voltage converter DC/DC and a load system, wherein the pantograph is connected with a mains supply, the output end of the pantograph is connected with the voltage converter AC/DC through a power line, the voltage converter AC/DC is connected with the lithium ion storage battery pack through the power line, the lithium ion battery pack is connected with the load system through the power line and supplies power to the load system, and meanwhile, the voltage converter AC/DC can be directly connected with the load system through the power line and supplies power to the load system. The fuel cell system is connected with the lithium ion storage battery pack and the load system through a voltage converter DC/DC to charge the lithium ion storage battery pack and supply power to the load system. The load system in the invention is a road vehicle and comprises a motor control system, a variable-frequency permanent magnet synchronous motor and a road vehicle transmission system (shown in figure 2) which are sequentially connected, wherein the motor control system is connected with a lithium ion battery system and a voltage converter DC/DC. The multi-energy intelligent power system also comprises an intelligent monitoring unit which is respectively connected with the lithium ion storage battery pack, the voltage converter AC/DC and the fuel cell system.
In a road section with complete electrification construction, a road vehicle obtains 25KV single-phase alternating current from a power grid through a pantograph, the 25KV single-phase alternating current is converted into direct current after being rectified by a voltage converter AC/DC, one path of the direct current is used for charging a lithium ion storage battery pack, and the other path of the direct current can directly enter a motor control system to drive the road vehicle to operate. When the multi-energy intelligent power system detects that the road vehicle is separated from the power grid, the lithium ion storage battery pack is automatically switched to an output state, and direct current is provided for the motor control system to drive the vehicle to run. The lithium ion storage battery pack has limited storage capacity, when a road vehicle runs away from a power grid for a long distance, the residual capacity of the lithium ion storage battery pack is close to a low-capacity protection value, and at the moment, the intelligent power system can quickly start the fuel cell system to charge the lithium ion storage battery pack. Since the output current of the fuel cell system is almost constant but the voltage changes greatly, it is necessary to provide a voltage converter DC/DC to boost the unstable DC voltage output from the fuel cell system to the set voltage of the lithium ion battery pack and the motor control system.
As shown in fig. 2, the lithium ion battery pack of the present invention includes a lithium ion battery and a battery management unit, wherein the lithium ion battery is an energy storage unit, and converts electric energy provided by a commercial power or a fuel cell system into chemical energy for storage, and the lithium ion battery achieves a voltage and a capacity required by a design by series-parallel connection; the battery management unit collects the voltage and the temperature of each lithium ion storage battery monomer and the total current of the battery pack in real time, and the problems of overcharge, overdischarge, over temperature and the like of each lithium ion storage battery monomer are avoided. After the commercial power is lost, the lithium ion storage battery pack can be automatically switched to an output state under the control of the battery management unit, so that power is provided for the road vehicle.
The fuel cell system needs to consume a large amount of high-purity hydrogen when in work, the fuel cell system comprises a hydrogen production device and a proton exchange membrane fuel cell, the hydrogen production device generates high-purity hydrogen, and the proton exchange membrane fuel cell needs to consume a large amount of high-purity hydrogen when in work and outputs direct current.
As shown in FIG. 2, the intelligent monitoring unit of the present invention is connected to the battery management unit, the voltage converter AC/DC and the PEM fuel cell, and the intelligent monitoring unit can monitor the voltage, temperature and total current of the battery pack of the lithium ion battery through the battery management unit and control the charging and discharging of the lithium ion battery. The intelligent monitoring unit is connected with the voltage converter AC/DC and can monitor whether the road vehicle is separated from a power grid or not, and the intelligent monitoring unit is connected with the proton exchange membrane fuel cell and can control the proton exchange membrane fuel cell to output direct current.
With reference to fig. 2, in the actual operation of the multi-energy intelligent power system of the present invention, as shown in fig. 3, in an electrified road section with commercial power, the commercial power is received through a pantograph, and is charged into a lithium ion battery pack after being subjected to AC/DC conversion by a voltage converter, and simultaneously supplies power to a motor control system; as shown in fig. 4, when the intelligent monitoring unit detects that the commercial power is lost, the intelligent monitoring unit controls the lithium ion storage battery to automatically change to an output state to supply power to the motor control system; as shown in fig. 5, after the long-time operation of the commercial power is lost, the intelligent monitoring unit monitors that the residual electric quantity of the lithium ion storage battery is close to the early warning value, the intelligent monitoring unit controls the proton exchange membrane fuel cell to start working, the hydrogen production device generates high-purity hydrogen, direct current is output by the proton exchange membrane fuel cell to charge the lithium ion storage battery, and meanwhile, the lithium ion storage battery supplies power to the motor control system, so that the reliable operation of the road vehicle is ensured; under the condition, the intelligent monitoring unit can also control the output state of the lithium ion storage battery pack to be closed, the proton exchange membrane fuel cell outputs direct current to charge the lithium ion storage battery pack, and meanwhile, the proton exchange membrane fuel cell supplies power to the motor control system. The multi-energy intelligent power system controls the intervention and exit of the three power sources in real time.
The hydrogen production device comprises at least one of a methanol reforming hydrogen production device, a solid hydrogen storage device and a high-pressure hydrogen storage bottle hydrogen storage device, wherein one of the three devices provides sufficient high-purity hydrogen for the proton exchange membrane fuel cell within a set time, and the fuel cell outputs current. A high purity hydrogen source may be obtained by:
1. methanol reforming hydrogen production device
As can be seen in fig. 6, a process flow for hydrogen production by methanol reforming. The chemical reaction formula is as follows:
CH3OH+H2O→C2O+3H2
methanol and desalted water are mixed in a certain proportion, and the mixture is pressurized by a metering pump to reaction pressure, and then is sent to a heat exchanger for preheating, and then is sent to a vaporization superheater to vaporize and overheat the raw material methanol aqueous solution to required temperature, the raw material gas completes 2 reactions of gas phase catalytic cracking and conversion in a converter under the action of a catalyst to generate CO-containing2，H2And CO conversion gas. The converted gas is cooled to about 40 ℃ by a heat exchanger and a condenser and then enters a purification tower to recover the unreacted methanol. The converted gas enters a pressure swing adsorption device to extract high-purity hydrogen, and CO are separated2And the washing liquid returns to the raw material liquid tank for reuse.
2. Solid hydrogen storage device
Some metal compounds in nature have strong hydrogen capture capability, and the reason is that hydrogen atoms enter a metal valence bond structure to form metal hydride; under certain temperature and pressure conditions, these metal hydrides decompose again, releasing the hydrogen stored therein. FIG. 7 is a schematic structural view of a solid hydrogen storage device, wherein a solid hydrogen storage tank is filled with hydrogen storage alloys, and the hydrogen storage alloys can be various titanium-iron series, lanthanum-nickel series, titanium-manganese series, magnesium series and the like; the solid hydrogen storage tank needs to have good heat conduction performance and certain pressure resistance (about 5 Mpa). Because the hydrogen storage alloy requires a certain pressure (usually 5Mpa) to be applied during the absorption of hydrogen and releases a large amount of heat; hydrogen storage alloys require a large amount of heat absorption during the hydrogen discharge process. Therefore, the solid hydrogen storage tank is provided with the temperature adjusting device, the circulating water path, the circulating pump, the heat exchanger and other parts on the outer side, and the solid hydrogen storage tank can be heated and radiated in time. The electromagnetic valve controls the storage and release of high-purity hydrogen in the hydrogen storage tank.
3. Hydrogen storage device of high-pressure hydrogen storage bottle
At present, a high-pressure gaseous hydrogen storage technology is still widely applied, and although potential safety hazards may be caused by excessively high hydrogen storage pressure, the highest hydrogen storage density per unit mass at present still has the greatest advantage. With the development of material science, the technology of the aluminum liner fiber winding bottle and the plastic liner fiber winding bottle is mature, related matched pipelines, valves and other products are also tested by the market, and at present, 35 Mpa-grade hydrogen storage bottles are mostly used in China. Fig. 8 shows a hydrogen storage device of a high-pressure hydrogen storage bottle, which is simple in structure, but is indispensable for safety settings such as a pressure sensor and a pressure release valve.
The intelligent monitoring unit in the invention is a commercial product, and is not described herein.
The road vehicle can be a motor vehicle, a mining automobile and a rail vehicle running on a rail.
The invention has the following advantages and positive effects:
1. the energy storage device is characterized in that a plurality of energy devices are used as power sources of road vehicles and used for energy storage scenes of rail vehicles, and the advantages of the energy devices are fully exerted;
2. the intelligent control multi-energy power device eliminates the defects of each energy device and realizes intelligent combined application;
3. by the optimized combination of various energy devices, the application field of new energy technology is expanded, the use of road vehicles is facilitated, and the adaptability of the road vehicles to various use environments is improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention.

Claims (7)

1. A multi-energy intelligent power system is used for rail vehicles and energy storage scenes and is characterized by comprising a pantograph, a voltage converter AC/DC, a lithium ion storage battery pack, a fuel cell system, a voltage converter DC/DC and a load system, wherein the pantograph is connected with commercial power, the output end of the pantograph is connected with the voltage converter AC/DC through a power line, the voltage converter AC/DC is connected with the lithium ion storage battery pack through the power line, the lithium ion battery pack is connected with the load system through the power line and supplies power to the load system, meanwhile, the voltage converter AC/DC is directly connected with the load system through the power line to supply power to the load system, the fuel cell system is connected with the lithium ion storage battery pack and the load system through the voltage converter DC/DC, charging the lithium ion battery pack and supplying power to the load system.
2. The multi-energy intelligent power system according to claim 1, wherein said multi-energy intelligent power system comprises an intelligent monitoring unit, said intelligent monitoring unit is connected to said lithium ion battery pack, said voltage converter AC/DC and said fuel cell system, said intelligent monitoring unit monitors the electric quantity of said lithium ion battery pack and controls the output state of said lithium ion battery pack, said intelligent monitoring unit controls the operation of said fuel cell system.
3. The multi-energy intelligent power system according to claim 2, wherein the lithium ion battery pack comprises a lithium ion battery and a battery management unit, and the intelligent monitoring unit is connected with the battery management unit and used for monitoring the electric quantity of the lithium ion battery and controlling the charging and discharging of the lithium ion battery.
4. The multi-energy intelligent power system according to claim 1, wherein the load system is a road vehicle, comprising a motor control system, a variable frequency permanent magnet synchronous motor and a road vehicle transmission system connected in sequence.
5. The multi-energy intelligent power system according to claim 2, wherein the fuel cell system comprises a hydrogen production device and a proton exchange membrane fuel cell, the hydrogen production device produces high-purity hydrogen, and the intelligent monitoring unit controls the operation of the proton exchange membrane fuel cell.
6. The multi-energy intelligent power system according to claim 5, wherein the hydrogen production device comprises at least one of a methanol reforming hydrogen production device, a solid-state hydrogen storage device, and a high-pressure hydrogen storage bottle hydrogen storage device.
7. The multi-energy smart power system of claim 1 wherein said road vehicle is a rail vehicle.
CN202110820321.6A 2021-07-20 2021-07-20 Multi-energy intelligent power system Pending CN113352908A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2946361A1 (en) * 2022-01-14 2023-07-17 H2Vector Energy Technoligies Sl Mixed hydrogen transmission system for driving hydraulic cranes (Machine-translation by Google Translate, not legally binding)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2946361A1 (en) * 2022-01-14 2023-07-17 H2Vector Energy Technoligies Sl Mixed hydrogen transmission system for driving hydraulic cranes (Machine-translation by Google Translate, not legally binding)

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