CN110979104A - DC/DC converter integrated with fuel cell controller function module and control method thereof - Google Patents
DC/DC converter integrated with fuel cell controller function module and control method thereof Download PDFInfo
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- CN110979104A CN110979104A CN201911167338.5A CN201911167338A CN110979104A CN 110979104 A CN110979104 A CN 110979104A CN 201911167338 A CN201911167338 A CN 201911167338A CN 110979104 A CN110979104 A CN 110979104A
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- fuel cell
- converter
- controller
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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
- 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
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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
- B60L15/007—Physical arrangements or structures of drive train converters specially adapted for the propulsion motors of electric vehicles
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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
Abstract
The present invention provides a DC/DC converter integrating a fuel cell controller function module, the DC/DC converter including an integrated controller, the integrated controller including a fuel cell controller function module for regulating an output power of a fuel cell and a DC/DC controller function module for controlling an internal DC/DC power circuit. The DC/DC converter can control the fuel cell and the DC/DC power circuit by only one integrated controller, can reduce the number of components, shorten the development period, reduce the development cost, enhance the interactive cooperation of the DC/DC converter and the fuel cell, improve the dynamic response performance, and has more compact system and convenient system integrated installation and debugging.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a DC/DC converter integrated with a fuel cell controller functional module and a control method thereof.
Background
The current world faces serious energy crisis and environmental pollution problems, and the popularization and mass use of automobiles are one of the important reasons for the problems, and the development of the automobile industry is also affected deeply, so that the development of new energy automobiles is not slow.
The development routes of new energy automobiles are many, but fuel cell automobiles are the most environment-friendly and efficient vehicles recognized by the industry. However, the output characteristics of the fuel cell are soft, and it is difficult to directly drive the motor of the vehicle, and it is usually necessary to improve the dynamic performance of the fuel cell by a direct current-direct current (DC/DC) converter.
However, the DC/DC converter in the current fuel cell automobile system is usually independent of the fuel cell system, both have independent controllers and need to perform information interaction in real time, the fuel cell and the DC/DC converter are connected in series and then connected to the automobile power system, the number of interfaces is large, the wiring is complex, the installation is dispersed, the overhaul is difficult, the space occupation is large, and the system complexity is improved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a DC/DC converter integrated with a fuel cell controller functional module and a control method thereof, so that a power system of a fuel cell vehicle is more compact, the interaction instantaneity, the control accuracy and the response timeliness of the DC/DC converter and a fuel cell are enhanced, the system integration level is improved, and the system development cost is reduced.
The purpose of the invention is realized by the following technical scheme:
in a first aspect, the present invention provides a DC/DC converter incorporating a fuel cell controller function for regulating the output power of a fuel cell and a DC/DC controller function for controlling an internal DC/DC power circuit, the DC/DC converter including an integrated controller.
Further, the DC/DC converter further includes:
DC/DC power circuit: the DC/DC power circuit is connected with the DC/DC controller function module integrated controller, and the DC/DC power circuit is controlled by the DC/DC controller function module in the integrated controller to provide a DC power supply for fuel cell automobile electric equipment.
Further, the integrated controller is connected with a fuel cell auxiliary system, and the fuel cell controller functional module drives and controls the fuel cell auxiliary system to adjust the output power of the fuel cell.
Further, the integrated controller is powered by a low-voltage power supply inside the fuel cell electric vehicle.
Further, the integrated controller is communicated with a whole vehicle communication system of the fuel cell electric vehicle in a bus communication mode.
Further, the DC/DC power circuit includes, but is not limited to, BOOST circuits, BUCK circuits, bridge circuits, LLC circuits, and variations and combinations thereof.
Furthermore, the input end of the DC/DC power circuit is connected with a fuel cell, the output end of the DC/DC power circuit is connected with electric equipment of a fuel cell electric vehicle, the control end of the DC/DC power circuit is connected with the DC/DC controller functional module, and the DC/DC power circuit is used for receiving voltage input of the fuel cell, outputting the voltage input to a power bus of the fuel cell electric vehicle after voltage boosting or voltage reducing conversion, and driving the electric vehicle to run.
Further, the bus communication is specifically CAN bus communication.
In a second aspect, the present invention also provides a control method of a DC/DC converter of an integrated fuel cell controller function module, which is applied to the DC/DC converter of the integrated fuel cell controller function module of the first aspect.
Further, the control method of the DC/DC converter of the integrated fuel cell controller function module includes the steps of:
starting/adjusting the fuel cell auxiliary system after receiving the power demand signal;
and detecting the operating state of the fuel cell, and starting the DC/DC converter to output the target power when the operating state of the fuel cell reaches the operating condition.
The invention has the beneficial effects that: the DC/DC converter can control the fuel cell and the DC/DC power circuit by only one integrated controller, can reduce the number of components, shorten the development period, reduce the development cost, enhance the interactive cooperation of the DC/DC converter and the fuel cell, improve the dynamic response performance, have more compact system and are convenient for the integrated installation and debugging of the system.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a structural topology diagram of a DC/DC converter integrating a fuel cell controller function module according to an embodiment of the present invention.
Fig. 2 is a diagram illustrating an example of the use of a DC/DC converter integrated with a fuel cell controller function module according to an embodiment of the present invention.
Fig. 3 is a flowchart of a control method of a DC/DC converter of the integrated fuel cell controller function module according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, 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, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Embodiment 1, a DC/DC converter integrating a fuel cell controller function module.
As shown in fig. 1, a DC/DC converter integrated with a fuel cell controller function module according to the present embodiment is used for a fuel cell electric vehicle, and includes:
an integrated controller: the integrated controller includes a fuel cell controller function for regulating the output power of the fuel cell and a DC/DC controller function for controlling the internal DC/DC power circuit.
DC/DC power circuit: the DC/DC power circuit is connected with the DC/DC controller functional module, and the DC/DC controller functional module controls the DC/DC power circuit to provide a DC power supply for the electric equipment of the automobile.
The DC/DC power circuit includes, but is not limited to, BOOST circuits, BUCK circuits, bridge circuits, LLC circuits, and variations and combinations thereof.
In the embodiment, the integrated controller is connected with a fuel cell auxiliary system, and the fuel cell controller functional module drives and controls the fuel cell auxiliary system to adjust the output power of the fuel cell.
The fuel cell auxiliary system mainly controls the motor drive of a reaction gas pump, a cooling liquid pump, a cooling fan and the like, the opening degree of a gas-liquid channel valve is controlled, and the functions of pressure, flow velocity, flow and temperature sensor data acquisition, monomer voltage inspection monitoring and the like are achieved.
The fuel cell auxiliary system can control the operation of a gas pump, a cooling liquid pump, a cooling fan and a gas-liquid channel valve, collect various data of the fuel cell in the electric automobile, such as pressure, flow rate, flow, temperature and the like, and can also carry out single voltage inspection and monitoring on the fuel cell stack of the electric automobile. From the various data, the operating state of the fuel cell can be judged.
In the present embodiment, the integrated controller may be powered by a 12V, 24V, or 42V low voltage power source in a fuel cell electric vehicle, and the present embodiment is described by taking a 12V low voltage power source in an electric vehicle as an example.
In the electric automobile, an automobile low-voltage system is started before a driving system, and before the electric automobile runs, a 12V low-voltage power supply in the fuel cell electric automobile can supply power to a main controller of the fuel cell electric automobile and an integrated controller of a DC/DC converter, so that the power of the fuel cell electric automobile is adjusted.
In this embodiment, the integrated Controller communicates with the entire electric vehicle communication system through a CAN (Controller Area Network) bus communication mode, and other buses such as PROFIBUS and EtherCAT may also be used under the condition that the functions of this embodiment CAN be implemented, and the use of the CAN bus communication does not form a limitation to this embodiment.
The whole vehicle communication system of the fuel cell electric vehicle is connected with the integrated controller for communication through CAN bus communication, and control signals and state data CAN be transmitted in real time.
The input end of the DC/DC power circuit is connected with a fuel cell, the output end of the DC/DC power circuit is connected with electric equipment of the electric automobile, the control end of the DC/DC power circuit is connected with the DC/DC controller functional module, the DC/DC power circuit is used for receiving voltage input of the fuel cell, and outputting the voltage input to a power bus of the fuel cell electric automobile after voltage boosting or voltage reducing conversion so as to drive the fuel cell electric automobile to run.
The start/stop of the DC/DC power circuit is controlled by the DC/DC controller functional module, the DC/DC power circuit can receive the voltage of the fuel cell with soft output characteristic, the voltage of the fuel cell with soft characteristic is subjected to voltage boosting or voltage reducing conversion, a stable direct current voltage is output to an automobile power bus, and the direct current voltage and auxiliary power sources such as a power battery and the like are used for driving an automobile motor independently or together.
As shown in fig. 2, the specific implementation process of this embodiment: after receiving a power demand signal of a fuel cell electric vehicle controller, a fuel cell DC/DC converter firstly controls a fuel cell auxiliary system to work through a fuel cell controller function module, adjusts a fuel cell to enable the maximum power of the fuel cell to meet the power demand, and takes the conversion efficiency of the DC/DC converter into consideration; the fuel cell controller functional module detects whether the operating state of the fuel cell reaches the operating condition in real time through data fed back by the fuel cell auxiliary system; and after the running condition is reached, starting the DC/DC converter to convert and output the target power to the motor of the automobile for use.
The DC/DC converter of the integrated fuel cell control system integrates the fuel cell controller function module and the DC/DC controller function module into one controller, so that a power system of a fuel cell vehicle can be more compact, the interaction real-time performance, the control accuracy and the response timeliness of the DC/DC converter and a fuel cell are enhanced, the system integration level is improved, and the system development cost is reduced.
Embodiment 2, a method of controlling a DC/DC converter integrated with a fuel cell controller function module.
As shown in fig. 3, the present embodiment provides a control method of a DC/DC converter of an integrated fuel cell controller function module, which is applied to the DC/DC converter of the integrated fuel cell controller function module described in embodiment 1, including the steps of:
starting/adjusting the fuel cell auxiliary system after receiving the power demand signal;
detecting an operating state of the fuel cell, and starting the DC/DC output target power when the operating state of the fuel cell reaches an operating condition.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A DC/DC converter integrating a fuel cell controller function module for regulating an output power of a fuel cell and a DC/DC controller function module for controlling an internal DC/DC power circuit, the DC/DC converter comprising an integrated controller.
2. The DC/DC converter of an integrated fuel cell controller function module according to claim 1, wherein the DC/DC converter further comprises:
DC/DC power circuit: the DC/DC power circuit is connected with the integrated controller, and the DC/DC power circuit is controlled by a DC/DC controller functional module in the integrated controller to provide a DC power supply for the electric equipment of the automobile.
3. The DC/DC converter of claim 1, wherein the integrated controller is connected with a fuel cell auxiliary system, and the fuel cell controller function module drives and controls the fuel cell auxiliary system to adjust the output power of the fuel cell.
4. The DC/DC converter of claim 1, wherein the integrated controller is powered by a low voltage power source inside the fuel cell electric vehicle.
5. The DC/DC converter of claim 1, wherein the integrated controller communicates with the vehicle communication system of the fuel cell electric vehicle by bus communication.
6. The DC/DC converter of claim 2, wherein the DC/DC power circuit includes, but is not limited to, BOOST circuits, BUCK circuits, bridge circuits, LLC circuits, and variations and combinations thereof.
7. The DC/DC converter of claim 2, wherein an input terminal of the DC/DC power circuit is connected to a fuel cell, an output terminal of the DC/DC power circuit is connected to an electric device of a fuel cell electric vehicle, a control terminal of the DC/DC power circuit is connected to the DC/DC controller function module, and the DC/DC power circuit is configured to receive a voltage input of the fuel cell, and output the voltage input to a power bus of the fuel cell electric vehicle after being subjected to voltage boosting or voltage dropping conversion, so as to drive the fuel cell electric vehicle to operate.
8. The DC/DC converter of claim 4, wherein the bus communication is a CAN bus communication.
9. A control method of a DC/DC converter of an integrated fuel cell controller function module, characterized in that the control method is applied to the DC/DC converter of the integrated fuel cell controller function module of any one of claims 1 to 8.
10. The method of controlling a DC/DC converter of an integrated fuel cell controller function module according to claim 8, comprising the steps of:
starting/adjusting the fuel cell auxiliary system after receiving the power demand signal;
and detecting the operating state of the fuel cell, and starting the DC/DC converter to output the target power when the operating state of the fuel cell reaches the operating condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911167338.5A CN110979104A (en) | 2019-11-25 | 2019-11-25 | DC/DC converter integrated with fuel cell controller function module and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911167338.5A CN110979104A (en) | 2019-11-25 | 2019-11-25 | DC/DC converter integrated with fuel cell controller function module and control method thereof |
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| CN110979104A true CN110979104A (en) | 2020-04-10 |
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| CN201911167338.5A Pending CN110979104A (en) | 2019-11-25 | 2019-11-25 | DC/DC converter integrated with fuel cell controller function module and control method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5714874A (en) * | 1993-09-06 | 1998-02-03 | Imra Europe Sa | Fuel cell voltage generator |
| CN207842683U (en) * | 2017-09-14 | 2018-09-11 | 银隆新能源股份有限公司 | A kind of power system of electric automobile based on fuel cell |
| CN109159720A (en) * | 2018-09-20 | 2019-01-08 | 北京汇通有利能源科技有限公司 | Fuel cell and system, control method, control system and electrical equipment |
| CN109532564A (en) * | 2018-12-14 | 2019-03-29 | 宁波石墨烯创新中心有限公司 | A kind of power-supply system and electric car |
-
2019
- 2019-11-25 CN CN201911167338.5A patent/CN110979104A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5714874A (en) * | 1993-09-06 | 1998-02-03 | Imra Europe Sa | Fuel cell voltage generator |
| CN207842683U (en) * | 2017-09-14 | 2018-09-11 | 银隆新能源股份有限公司 | A kind of power system of electric automobile based on fuel cell |
| CN109159720A (en) * | 2018-09-20 | 2019-01-08 | 北京汇通有利能源科技有限公司 | Fuel cell and system, control method, control system and electrical equipment |
| CN109532564A (en) * | 2018-12-14 | 2019-03-29 | 宁波石墨烯创新中心有限公司 | A kind of power-supply system and electric car |
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Application publication date: 20200410 |
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| RJ01 | Rejection of invention patent application after publication |