CN111976510A - Fuel cell power system - Google Patents
Fuel cell power system Download PDFInfo
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- CN111976510A CN111976510A CN202010866366.2A CN202010866366A CN111976510A CN 111976510 A CN111976510 A CN 111976510A CN 202010866366 A CN202010866366 A CN 202010866366A CN 111976510 A CN111976510 A CN 111976510A
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- fuel cell
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- cell power
- air compressor
- power supply
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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
- B60L50/70—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by fuel cells
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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
- B60L15/00—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles
- B60L15/20—Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles for control of the vehicle or its driving motor to achieve a desired performance, e.g. speed, torque, programmed variation of speed
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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
- 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
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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
- 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)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Fuel Cell (AREA)
Abstract
The invention provides a fuel cell power system, which comprises a power supply module and a fuel cell power supply module which are connected in parallel, wherein the power supply module comprises a power supply and an auxiliary air compressor control device electrically connected with the power supply, the fuel cell power supply module comprises a pile and an auxiliary air compressor electrically connected with the pile, and the air compressor control device is used for controlling the operation of the auxiliary air compressor. The fuel cell power system integrates the functions of pressure regulation and pressure stabilization in the motor control device and the air compressor control device respectively, reduces the system cost and improves the system integration level.
Description
Technical Field
The invention belongs to the field of electric automobiles, and relates to a fuel cell power system.
Background
The fuel cell automobile is one of the most widely known applications in the hydrogen energy industry, and is known as an important future development direction of new energy automobiles because the fuel cell automobile has the advantages of zero emission, quick filling, long endurance and the like.
The fuel cell power system is limited by unidirectional power output of the fuel cell, slow in dynamic response and limited in service life, and the configuration of a general fuel cell power system needs to increase auxiliary energy management of the power cell, which undoubtedly greatly increases the complexity, the arrangement difficulty and the assembly cost of the system. With the continuous development of fuel cell technology, full-power dynamic response within 1s can be realized at the present stage, the influence on the service life is very little, and only the existing unique technical pain point is that energy recovery cannot be carried out. The 48V accessory power supply is widely applied as a driving power supply on a mild hybrid vehicle type, and the 48V power supply can effectively reduce accessory control current, recover braking energy and greatly reduce the cost of the whole vehicle, so that the 48V accessory power supply is a preferable scheme for solving the problems.
CN110676484A discloses a bidirectional power supply circuit, which is electrically connected to a motor controller, and the motor controller is electrically connected to a traction motor, and includes a power capacitor bank module, a fuel cell system, a control power module, and a capacitor emergency charging and discharging module. The circuit adopts a fuel cell system to supplement electric energy for the power capacitor bank module, and simultaneously supplements the electric energy and drives the power capacitor bank module to run, so that the whole power capacitor bank module can continuously keep electric quantity, the electric bus can continuously run, the running mileage is greatly increased, and meanwhile, the emergency charging and discharging module of the capacitor is additionally arranged to carry out emergency charging and discharging management, thereby ensuring the safety during maintenance; when the electric quantity of the 48V storage battery is reduced, the 48V storage battery can be reversely charged through the power capacitor bank module, and therefore the stable reliability of the fuel cell system is controlled. The circuit adopts the super capacitor, the fuel cell system is used for charging the super capacitor so as to achieve the purpose of continuous operation, the circuit design is complex, the control difficulty of the circuit is increased, the cost of the super capacitor is higher, and the production cost of the vehicle is increased.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a fuel cell power system which integrates the functions of voltage regulation and voltage stabilization in a motor control device and an air compressor control device respectively, reduces the system cost and improves the system integration level.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a fuel cell power system which comprises a power supply module and a fuel cell power supply module which are connected in parallel, wherein the power supply module comprises a power supply and an auxiliary air compressor control device electrically connected with the power supply, the fuel cell power supply module comprises a pile and an auxiliary air compressor connected with the pile, and the air compressor control device is used for controlling the operation of the auxiliary air compressor.
In the present invention, the galvanic pile is a place where oxygen and hydrogen react to generate electric energy.
As a preferable technical scheme of the invention, the power supply is a 48V power supply.
In the invention, an auxiliary air compressor (48V) is added in a system air loop and used for supplying air to the fuel cell in a start-up and standby mode; the direct use of system air compressors, particularly centrifugal air compressors, has the problems of excessively narrow low-flow working intervals and low efficiency, and is not suitable for direct matching with 48V power supplies.
As a preferable technical solution of the present invention, the power supply module includes a motor control device, and the motor control device is electrically connected to the stack.
In the invention, the motor control device is used for driving the motor to meet the vehicle running requirement.
As a preferable technical solution of the present invention, the power supply module includes a bidirectional DC/DC converter and an air compressor control device, the bidirectional DC/DC converter and the air compressor control device are electrically connected to a circuit between the motor control device and the electric pile, and the bidirectional DC/DC converter is electrically connected to the power supply.
In the invention, the bidirectional DC/DC converter is used for voltage conversion between a 48V power supply and a high-voltage bus of a whole vehicle and has a power consumption function.
As a preferred embodiment of the present invention, the auxiliary air compressor control device, the hydrogen circulation pump control device, the water pump control device, the heating device, the cooling device, and the air conditioning compressor control device are electrically connected to a circuit connecting the power supply and the bidirectional DC/DC converter.
In the invention, the hydrogen circulating pump control device is used for driving the hydrogen circulating pump to recycle unreacted hydrogen and increase the anode flow of the galvanic pile, the water pump control device is used for driving the water pump to control the flow of cooling liquid, the heating device is used for heating the cooling liquid in a low-temperature environment, the cooling device is used for cooling a cooling system, and the air-conditioning compressor control device is used for driving the air-conditioning compressor to adjust the temperature of a cab of the whole vehicle. However, the device driven by the power supply module is not limited to the above device, and other vehicle components driven by 48V power may be connected to the power supply module.
As a preferred technical solution of the present invention, the fuel cell power supply module includes the stack and a gas supply assembly connected to a gas inlet of the stack.
As a preferable technical scheme of the invention, the air supply assembly comprises an air filter device, an air outlet pipeline of the air filter device is divided into two branches which are connected in parallel, one branch is connected with the air compression device, and the other branch is connected with the auxiliary air compression device.
As a preferable technical scheme of the invention, an intercooling device and a humidifying device are sequentially arranged between the air compression device and the galvanic pile along the air flowing direction, and an air outlet of the humidifying device is connected with an air inlet of the galvanic pile.
As a preferable technical scheme of the invention, an air outlet of the auxiliary air compression device is connected with an air inlet of the electric pile, and a one-way valve is arranged on a connecting pipeline of the auxiliary air compression device and the electric pile.
As a preferable aspect of the present invention, the air compressor control device controls an operation of the air compression device.
In the invention, the air filter device is used for filtering impurity pollutants in air, the air compression device is used for providing air required by reaction for the fuel cell, the intercooling device is used for cooling high-temperature gas behind the air compressor, the humidifying device humidifies the air by using humid gas at the outlet of the fuel cell, and the one-way valve is used for preventing the air from flowing backwards.
In the present invention, the fuel cell power system comprises 6 operation modes, i.e. a start-up mode, a standby mode, a loading mode, a load shedding mode and a braking regeneration mode, and the five operation modes are as follows:
a starting mode: the power supply of 48V, start the hydrogen circulating pump through the hydrogen circulating pump controlling device, circulate hydrogen; starting an auxiliary air compression device to supply air to the electric pile through an auxiliary air compression device control device; and starting the cooling water pump through the water pump control device to circulate the cooling liquid. And after the fuel cell stack is started, starting the air compression device and closing the auxiliary air compression device.
Standby mode: and the motor is turned off through the motor control device, the air compression device is turned off through the air compression device control device, and the bidirectional DC/DC converter is disconnected after the voltage of the galvanic pile is quickly reduced to the target voltage through the bidirectional DC/DC converter. The 48V power supply is used for supplying power, the auxiliary air compressor is started and maintained through the auxiliary air compressor control device, the hydrogen circulating pump is started and maintained through the hydrogen circulating pump control device, the working rotating speed of the cooling water pump is started and maintained through the water pump control device, and the voltage of the galvanic pile is maintained. If the 48V power supply is too low or a start command is received, the standby mode is exited.
Loading a mode: the 48V power supply supplies power, the power is output to the motor and the air compression device through the boosting of the bidirectional DC/DC converter, the power of the galvanic pile is increased at a certain rate, the target output power can be increased within 1s, and the bidirectional DC/DC converter is disconnected. If the power of the 48V power supply is too low, the power is charged through the bidirectional DC/DC converter.
A load shedding mode; the stack reduces power at a rate that can be reduced to the target output power within 1s, during which time the 48V power supply is charged through the bi-directional DC/DC converter. For example, the 48V power supply is full, and the air conditioner compressor can be started to consume power through the heating device and the air conditioner compressor control device.
A braking regeneration mode: the motor brake is controlled by the motor control device to recover energy, and the 48V power supply is charged through the bidirectional DC/DC converter. For example, the 48V power supply is full, and the air conditioner compressor can be started to consume power through the heating device and the air conditioner compressor control device.
Shutdown mode: the motor is turned off through the motor control device, the 48V power supply is charged through the bidirectional DC/DC converter during shutdown, the air compression device is turned off after purging, and power consumption is completed through the bidirectional DC/DC converter.
Compared with the prior art, the invention at least has the following beneficial effects:
the invention provides a fuel cell power system, which integrates the functions of voltage regulation and voltage stabilization in a motor control device and an air compressor control device respectively, reduces the system cost and improves the system integration level.
Drawings
Fig. 1 is a schematic structural diagram of a fuel cell power system provided in embodiment 2 of the present invention.
In the figure: 1-fuel cell, 2-bidirectional DC/DC converter, 3-hydrogen circulating pump controller, 4-auxiliary air compressor controller, 5-water pump controller, 6-heater, 7-cooler, 8-air conditioner compressor controller, 9-48V power supply, 10-motor controller, 11-air compressor controller, 20-air filter, 21-air compressor, 22-intercooler, 23-membrane humidifier, 24-auxiliary air compressor, 25-one-way valve.
The present invention is described in further detail below. The following examples are merely illustrative of the present invention and do not represent or limit the scope of the claims, which are defined by the claims.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
To better illustrate the invention and to facilitate the understanding of the technical solutions thereof, typical but non-limiting examples of the invention are as follows:
example 1
The embodiment provides a fuel cell power system, the system includes parallelly connected power supply module and fuel cell power module, power supply module include 48V power and with the supplementary air compressor controller that 48V power electricity is connected, fuel cell power module include the pile and with the supplementary air compressor that the pile electricity is connected, the air compressor controller is used for controlling the operation of supplementary air compressor.
Example 2
The embodiment provides a fuel cell power system, which comprises a power supply module and a fuel cell power supply module which are connected in parallel, wherein the power supply module comprises a 48V power supply 9 and an auxiliary air compressor controller 4 electrically connected with the 48V power supply 9, the fuel cell power supply module comprises a fuel cell 1 and an auxiliary air compressor 24 electrically connected with the fuel cell 1, and the air compressor controller 4 is used for controlling the operation of the auxiliary air compressor 24;
the power supply module comprises a motor controller 10, and the motor controller 10 is electrically connected with the fuel cell 1; the power supply module comprises a bidirectional DC/DC converter 2 and an air compressor controller 11, the bidirectional DC/DC converter 2 and the air compressor controller 11 are electrically connected to a circuit between the motor controller 10 and the fuel cell 1, and the bidirectional DC/DC converter 2 is electrically connected with the 48V power supply 9; the auxiliary air compressor controller 4, the hydrogen circulating pump controller 3, the water pump controller 5, the heater 6, the cooler 7 and the air conditioner compressor controller 8 are electrically connected to a circuit connected with the bidirectional DC/DC converter 2 through the 48V power supply 9;
the fuel cell power supply module comprises the fuel cell 1 and a gas supply assembly connected with a gas inlet of the fuel cell 1; the air supply assembly comprises an air filter 20, an air outlet pipeline of the air filter 20 is divided into two branches which are connected in parallel, one branch is connected with an air compressor 21, and the other branch is connected with an auxiliary air compressor 24; an intercooler 22 and a membrane humidifier 23 are sequentially arranged between the air compressor 21 and the fuel cell 1 along the air flowing direction, and the air outlet of the membrane humidifier 23 is connected with the air inlet of the fuel cell 1; the air outlet of the auxiliary air compressor 24 is connected with the air inlet of the fuel cell 1, and a one-way valve 25 is arranged on a connecting pipeline of the auxiliary air compressor 24 and the fuel cell 1; the air compressor controller 11 controls the operation of the air compressor 21.
Example 3
The present embodiment provides the working mode of the fuel cell power system provided in embodiment 2, and the working mode is operated as follows:
a starting mode: the power supply 1 with 48V supplies power, and the hydrogen circulating pump is started through the hydrogen circulating pump controller 3 to circulate hydrogen; starting the auxiliary air compressor 24 by the auxiliary air compressor controller 4 to supply air to the fuel cell 1; the cooling water pump is started by the water pump controller 5 to circulate the cooling liquid. After the fuel cell 1 is started, the air compressor 21 is started, and the auxiliary air compressor 24 is turned off.
Standby mode: the motor is turned off by the motor controller 10, and the air compressor 21 is turned off by the air compressor controller 11, and the bidirectional DC/DC converter 2 is turned off after the voltage of the fuel cell 1 is rapidly reduced to the target voltage by the bidirectional DC/DC converter 2. The 48V power supply 9 supplies power, the auxiliary air compressor 24 is started and maintained by the auxiliary air compressor controller 4, the hydrogen circulation pump is started and maintained by the hydrogen circulation pump controller 3, and the cooling water pump is started and maintained at the operating speed by the water pump controller 5, thereby maintaining the voltage of the fuel cell 1. If the 48V power supply 9 is too low or a start command is received, the standby mode is exited.
Loading a mode: the 48V power 9 supplies power, the power is boosted by the bidirectional DC/DC converter 2 to output power to the motor and the air compressor 21, the fuel cell 1 increases the power at a certain rate, the target output power can be increased within 1s, and the bidirectional DC/DC converter 2 is disconnected. If the 48V power supply 9 is too low, it is charged through the bidirectional DC/DC converter 2.
A load shedding mode; the fuel cell 1 reduces power at a rate that can be reduced to the target output power within 1s, during which the 48V power supply 9 is charged through the bidirectional DC/DC converter 2. E.g., 48V power supply 9 is fully charged, it may initiate air conditioner compressor power consumption through heater 6 and through air conditioner compressor controller 8.
A braking regeneration mode: the motor brake is controlled by the motor controller 10 to recover energy during which the 48V power supply 9 is charged through the bidirectional DC/DC converter 2. E.g., 48V power supply 9 is fully charged, it may initiate air conditioner compressor power consumption through heater 6 and through air conditioner compressor controller 8.
Shutdown mode: the motor is turned off through the motor controller 10, the 48V power supply is charged through the bidirectional DC/DC converter 2 during shutdown, the air compressor 21 is turned off after purging, and power consumption is completed through the bidirectional DC/DC converter 2.
The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above embodiments, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must be implemented depending on the above detailed structural features. It should be understood by those skilled in the art that any modifications of the present invention, equivalent substitutions of selected components of the present invention, additions of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (10)
1. A fuel cell power system comprising a power supply module and a fuel cell power module connected in parallel, the power supply module comprising a power source and an auxiliary air compressor control electrically connected to the power source, the fuel cell power module comprising a stack and an auxiliary air compressor electrically connected to the stack, the air compressor control for controlling operation of the auxiliary air compressor.
2. The fuel cell power system of claim 1, wherein the power source is a 48V power source.
3. The fuel cell power system of claim 1 or 2, wherein the power supply module includes a motor control device electrically connected to the stack.
4. The fuel cell power system of claim 3, wherein the power supply module includes a bi-directional DC/DC converter and an air compressor control device electrically connected to the electrical circuit between the motor control device and the stack, the bi-directional DC/DC converter electrically connected to the power source.
5. The fuel cell power system according to claim 4, wherein the auxiliary air compressor control device, the hydrogen circulation pump control device, the water pump control device, the heating device, the cooling device, and the air conditioner compressor control device are electrically connected to a circuit in which the power source is connected to the bidirectional DC/DC converter.
6. The fuel cell power system of claim 1, wherein the fuel cell power module comprises the stack and an air supply assembly coupled to an air inlet of the stack.
7. The fuel cell power system of claim 6, wherein the air supply assembly includes an air filter, and the air outlet line of the air filter is divided into two parallel branches, one branch is connected to the air compressor, and the other branch is connected to the auxiliary air compressor.
8. The fuel cell power system as claimed in claim 7, wherein an intercooling device and a humidifying device are sequentially arranged between the air compressing device and the electric pile along the air flowing direction, and an air outlet of the humidifying device is connected with an air inlet of the electric pile.
9. The fuel cell power system as claimed in claim 7, wherein the air outlet of the auxiliary air compression device is connected with the air inlet of the electric pile, and a one-way valve is arranged on a connecting pipeline of the auxiliary air compression device and the electric pile.
10. The fuel cell power system according to claim 7, wherein the air compressor control means controls operation of the air compression means.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010866366.2A CN111976510B (en) | 2020-08-25 | 2020-08-25 | Fuel cell power system |
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| CN202010866366.2A CN111976510B (en) | 2020-08-25 | 2020-08-25 | Fuel cell power system |
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| CN111976510A true CN111976510A (en) | 2020-11-24 |
| CN111976510B CN111976510B (en) | 2021-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113071506A (en) * | 2021-05-20 | 2021-07-06 | 吉林大学 | Fuel cell automobile energy consumption optimization system considering cabin temperature |
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| CN111048804A (en) * | 2019-12-30 | 2020-04-21 | 东风汽车集团有限公司 | Oxygen supply method, oxygen supply system and control system for hydrogen fuel cell |
| CN111430751A (en) * | 2020-04-04 | 2020-07-17 | 东风汽车集团有限公司 | Idle oxygen supply control method and system of fuel cell system |
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2020
- 2020-08-25 CN CN202010866366.2A patent/CN111976510B/en active Active
Patent Citations (5)
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| CN207758583U (en) * | 2017-11-13 | 2018-08-24 | 中山大洋电机股份有限公司 | A kind of vehicle fuel battery dynamical system and its New-energy electric vehicle of application |
| CN110061263A (en) * | 2018-01-19 | 2019-07-26 | 郑州宇通客车股份有限公司 | A kind of hybrid fuel cell air subsystem, vehicle and control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113071506A (en) * | 2021-05-20 | 2021-07-06 | 吉林大学 | Fuel cell automobile energy consumption optimization system considering cabin temperature |
| CN113071506B (en) * | 2021-05-20 | 2022-04-05 | 吉林大学 | Fuel cell automobile energy consumption optimization system considering cabin temperature |
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| CN111976510B (en) | 2021-12-21 |
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