CN111114347A - Fuel cell direct current converter, electric vehicle power supply system and control method - Google Patents
Fuel cell direct current converter, electric vehicle power supply system and control method Download PDFInfo
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- CN111114347A CN111114347A CN202010023120.9A CN202010023120A CN111114347A CN 111114347 A CN111114347 A CN 111114347A CN 202010023120 A CN202010023120 A CN 202010023120A CN 111114347 A CN111114347 A CN 111114347A
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- 239000000446 fuel Substances 0.000 title claims abstract description 145
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims description 32
- 238000004891 communication Methods 0.000 claims description 8
- 230000008901 benefit Effects 0.000 abstract description 8
- 238000011161 development Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
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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
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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
- 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
- B60L53/10—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 the energy transfer between the charging station and the vehicle
- B60L53/14—Conductive energy transfer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering with light sensitive cells
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
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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
- Y02T10/70—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
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for 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
- Y02T90/10—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)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Fuel Cell (AREA)
Abstract
The invention provides a fuel cell DC converter, an electric vehicle power supply system and a control method, wherein the fuel cell DC converter is arranged between a fuel cell and a driving motor, the fuel cell can supply power to the driving motor through the fuel cell DC converter, the electric vehicle power supply system comprises a charging input interface and a charging output interface, the charging input interface is connected with an external charging power supply, the charging output interface is connected with a power battery, and when the fuel cell does not supply power to the driving motor, the external charging power supply can charge the power battery through the fuel cell DC converter. According to the invention, the external charging interface is integrated on the fuel cell DC converter, so that the vehicle-mounted charger can be replaced, the use benefit of the fuel cell DC converter can be improved, and the structure of an automobile power system is more compact; meanwhile, the photovoltaic array can be directly connected to charge, so that the solar photovoltaic array is more environment-friendly and has higher energy utilization rate.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a fuel cell direct current converter, an electric vehicle power supply system and a control method.
Background
Energy crisis and environmental pollution are becoming more serious, and energy conservation and emission reduction are the constant subjects. The automobile industry is an important field for realizing the aims of energy conservation and environmental protection, and compared with the traditional automobile, the pure electric automobile reduces the emission of tail gas such as carbon dioxide and the like, and is greatly supported and popularized by China. However, the pure electric vehicle takes the power battery as the only energy source, and has the problems of less energy storage, insufficient endurance and the like. The fuel cell automobile can solve the problem of automobile endurance and is an important development direction of the automobile industry at present. The fuel cell is connected with the power battery in parallel through a direct current converter (DC/DC) to supply power to the automobile, the DC/DC converter takes the fuel cell as the only input source, the energy supply mode is single, and when the fuel cell stops working, the DC/DC converter also stops working, and the use benefit is low.
In the prior art, a part of power batteries receive external power supply charging through a vehicle-mounted charger, and a fuel battery DC/DC converter can perform power conversion on a vehicle-mounted fuel battery and vehicle-mounted photovoltaic power generation for charging the power batteries so as to solve the problem that the fuel battery DC/DC converter is single in energy supply. However, the vehicle-mounted photovoltaic power generation power is limited by the size of the area of the roof, the power range of the DC/DC converter cannot be fully utilized due to the fact that the vehicle-mounted photovoltaic power generation power is small compared with the electric power for the vehicle, the charging amount of the power battery is always a salary, the input cost is high, the benefit is small, and meanwhile the fuel cell DC/DC converter is also in a stop operation state when the power battery is externally charged, and the use benefit is low.
Disclosure of Invention
In view of the above, the present invention provides a fuel cell dc converter, an electric vehicle power supply system and a control method, which are at least used for solving the technical problems of complex power supply system and low utilization rate in the prior art, and specifically:
in a first aspect, the present invention provides a fuel cell dc converter, which is disposed between a fuel cell and a driving motor, and through which the fuel cell can supply power to the driving motor, and includes a charging input interface and a charging output interface, wherein the charging input interface is connected to an external charging power source, and the charging output interface is connected to a power battery,
when the fuel cell does not supply power to the driving motor, the external charging power supply can charge the power battery through the fuel cell direct current converter.
Further optionally, the fuel cell dc conversion circuit further includes a fuel cell input interface, the fuel cell input interface is connected to the fuel cell output terminal, and the charging output interface is further connected to the driving motor; and/or the presence of a gas in the gas,
the fuel cell direct current conversion circuit further comprises a fuel cell input interface and a power supply output interface, the fuel cell input interface is connected with the output end of the fuel cell, and the power supply output interface is connected with the driving motor.
Further optionally, the fuel cell dc converter internally comprises: a controller, a selection switch and a power conversion circuit which are electrically connected with the controller,
the selector switch is electrically connected with the charging input interface and the fuel cell input interface, the selector switch is also connected with the power conversion circuit, and the selector switch is used for switching the communication states of the charging input interface and the fuel cell input interface and the power conversion circuit according to a control instruction of the controller.
Further optionally, the photovoltaic charging system further comprises a maximum power tracker, the maximum power tracker is disposed at the charging input interface, and when the charging input interface is connected to the photovoltaic array for charging, the maximum power tracker starts to operate.
In a second aspect, the present invention provides a power supply system for an electric vehicle, including a fuel cell, a power cell, and a fuel cell dc converter, where the fuel cell dc converter includes a charging input interface, a fuel cell input interface, and an output interface, the charging input interface is connected to an external charging power source, the fuel cell input interface is connected to an output end of the fuel cell, the output interface is connected to the power cell and a driving motor of the electric vehicle,
the fuel cell supplies power to the driving motor through the fuel cell DC converter, or the external charging power supply charges the power battery through the fuel cell DC converter.
Further optionally, the fuel cell dc converter internally comprises: a controller, a selection switch and a power conversion circuit which are electrically connected with the controller,
the selector switch is electrically connected with the charging input interface and the fuel cell input interface, the selector switch is also connected with the power conversion circuit, and the selector switch is used for switching the communication states of the charging input interface and the fuel cell input interface and the power conversion circuit according to a control instruction of the controller.
Further optionally, the photovoltaic charging system further comprises a maximum power tracker, the maximum power tracker is disposed at the charging input interface, and when the charging input interface is connected to the photovoltaic array for charging, the maximum power tracker starts to operate.
In a third aspect, the present invention provides a method for controlling the power supply system of the electric vehicle, including:
the fuel cell supplies power to the drive motor through the fuel cell DC converter when the fuel cell is operating,
when the fuel cell stops running and the external charging power supply is connected with the charging input interface, the external charging power supply charges the power cell through the fuel cell direct current converter.
In a fourth aspect, the present invention provides a method for controlling the electric vehicle power supply system, including:
the controller detects the operating state of the power supply system,
when the controller detects that the fuel cell operates, the controller controls the selector switch to act, so that the fuel cell is communicated with the power conversion circuit, and the fuel cell supplies power to the driving motor;
when the controller detects that the fuel cell is not operated and the external charging power supply is connected with the charging input interface, the controller controls the selection switch to act, so that the external charging power supply is communicated with the power conversion circuit and charges the power cell.
Further optionally, when the external power source is communicated with the power conversion circuit, the controller detects the type of the external charging power source,
when the external charging power supply is a direct current charging pile, the external charging power supply directly charges the power battery,
when the external charging power supply is a photovoltaic array, the maximum power tracker is started, and the power battery is charged after the power supply is processed.
The external charging interface is integrated on the fuel cell DC converter, so that the external charging interface can replace a vehicle-mounted charger, the development cost of a fuel cell vehicle is reduced, an external charging power supply reuses hardware resources of the fuel cell DC converter to charge a power battery, the use benefit of the fuel cell DC converter can be improved, and the structure of a vehicle power system is more compact; meanwhile, the photovoltaic array can be directly connected to charge, so that the solar photovoltaic array is more environment-friendly and has higher energy utilization rate.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.
FIG. 1 is a block diagram of a fuel cell DC converter according to the present invention;
fig. 2 is a block diagram showing an internal structure of a fuel cell dc converter provided by the present invention;
fig. 3 shows a control flowchart of the electric vehicle power supply system.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The fuel cell DC converter provided by the invention is used for converting the current output by the fuel cell on the electric automobile and charging the power battery. As shown in fig. 1 and fig. 2, the fuel cell dc converter is disposed between a fuel cell and a driving motor, and the fuel cell can supply power to the driving motor through the fuel cell dc converter, and includes a charging input interface and a charging output interface, where the charging input interface is connected to an external charging power source, the charging output interface is connected to a power battery, and when the fuel cell does not supply power to the driving motor, the external charging power source can charge the power battery through the fuel cell dc converter. Preferably, the external charging power source comprises a direct current charging pile or a photovoltaic array charging pile, and the photovoltaic array is a charging system for converting solar energy into electric energy.
The fuel cell direct current conversion circuit further comprises a fuel cell input interface, the fuel cell input interface is connected with the output end of the fuel cell, the charging output interface is further connected with the driving motor, namely the power cell and the driving motor are simultaneously connected with the charging output interface, and the driving motor and the power cell are connected with the charging output interface through an automobile power bus.
Or, the fuel cell direct current conversion circuit further comprises a fuel cell input interface and a power supply output interface, the fuel cell input interface is connected with the output end of the fuel cell, the power supply output interface is connected with the driving motor, namely, the power cell and the driving motor are respectively connected with the power supply output interface through the charging output interface.
As shown in fig. 2, the fuel cell dc converter includes: the controller can receive external communication information and monitor the internal operation state, and controls the other three components to realize the complete machine functions of fuel cell power conversion, external charging and the like.
The selector switch is electrically connected with the charging input interface and the fuel cell input interface, the selector switch is also connected with the power conversion circuit, and the selector switch is used for switching the communication states of the charging input interface and the fuel cell input interface and the power conversion circuit according to a control instruction of the controller. When the controller receives the operation of the fuel cell, the controller controls the selector switch to enable the fuel cell to be communicated with the power converter, and when the controller receives the communication between an external charging power supply and the charging input interface, the controller controls the selector switch to act to enable the external charging power supply to be communicated with the power cell to charge the power cell. Specifically, when the automobile is externally charged only when the automobile stops operating, the voltage of the charging input interface is detected, if the voltage value reaches the lowest charging voltage, the external charging is determined, and if the voltage is low or no voltage exists, the external charging is not performed.
Preferably, the photovoltaic charging system further comprises a maximum power tracker (MPPT), the maximum power tracker is arranged at the charging input interface, and when the charging input interface is connected with the photovoltaic array for charging, the maximum power tracker starts to work, and is responsible for monitoring and tracking the maximum power of the photovoltaic array and keeping the photovoltaic array to operate at the maximum power operating point.
The invention also provides a power supply system of the electric automobile, which comprises a fuel cell, a power cell and a fuel cell direct current converter, wherein the fuel cell direct current converter has the same structure and working mode as the fuel cell direct current conversion cell, and the detailed description is omitted here.
As shown in fig. 3, the method for controlling the power supply system of the electric vehicle includes:
the fuel cell supplies power to the drive motor through the fuel cell DC converter when the fuel cell is operating,
when the fuel cell stops running and the external charging power supply is connected with the charging input interface, the external charging power supply charges the power cell through the fuel cell direct current converter.
In particular, the amount of the solvent to be used,
the controller detects the operating state of the power supply system,
when the controller detects that the fuel cell operates, the controller controls the selector switch to act, so that the fuel cell is communicated with the power conversion circuit, and the fuel cell supplies power to the driving motor;
when the controller detects that the fuel cell is not operated and the external charging power supply is connected with the charging input interface, the controller controls the selection switch to act, so that the external charging power supply is communicated with the power conversion circuit and charges the power cell.
Further, when the external power supply is communicated with the power conversion circuit, the controller detects the type of the external charging power supply,
when the external charging power supply is a direct current charging pile, the external charging power supply directly charges the power battery,
when the external charging power supply is a photovoltaic array, the maximum power tracker is started, and the power battery is charged after the power supply is processed.
The fuel cell DC converter can replace a vehicle-mounted charger, reduce the development cost of a fuel cell vehicle, and an external charging power supply reuses hardware resources of the fuel cell DC converter to charge a power cell, so that the use benefit of the fuel cell DC converter can be improved, and the structure of a vehicle power system is more compact; meanwhile, the photovoltaic array can be directly connected to charge, so that the solar photovoltaic array is more environment-friendly and has higher energy utilization rate.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (10)
1. A fuel cell DC converter is arranged between a fuel cell and a driving motor, the fuel cell can supply power to the driving motor through the fuel cell DC converter, the fuel cell DC converter is characterized by comprising a charging input interface and a charging output interface, the charging input interface is connected with an external charging power supply, the charging output interface is connected with a power battery,
when the fuel cell does not supply power to the driving motor, the external charging power supply can charge the power battery through the fuel cell direct current converter.
2. The fuel cell dc converter of claim 1, wherein the fuel cell dc conversion circuit further comprises a fuel cell input interface, the fuel cell input interface being connected to a fuel cell output, the charging output interface being further connected to the drive motor; and/or the presence of a gas in the gas,
the fuel cell direct current conversion circuit further comprises a fuel cell input interface and a power supply output interface, the fuel cell input interface is connected with the output end of the fuel cell, and the power supply output interface is connected with the driving motor.
3. The fuel cell dc converter according to claim 2, characterized in that the fuel cell dc converter internally includes: a controller, a selection switch and a power conversion circuit which are electrically connected with the controller,
the selector switch is electrically connected with the charging input interface and the fuel cell input interface, the selector switch is also connected with the power conversion circuit, and the selector switch is used for switching the communication states of the charging input interface and the fuel cell input interface and the power conversion circuit according to a control instruction of the controller.
4. The fuel cell dc converter of claim 3 further comprising a maximum power tracker disposed at the charge input interface, the maximum power tracker operating when the charge input interface is turned on for charging the photovoltaic array.
5. A power supply system of an electric automobile comprises a fuel cell, a power cell and a fuel cell DC converter, and is characterized in that the fuel cell DC converter comprises a charging input interface, a fuel cell input interface and an output interface, the charging input interface is connected with an external charging power supply, the fuel cell input interface is connected with the output end of the fuel cell, the output interface is connected with the power cell and a driving motor of the electric automobile,
the fuel cell supplies power to the driving motor through the fuel cell DC converter, or the external charging power supply charges the power battery through the fuel cell DC converter.
6. The electric vehicle power supply system according to claim 5, wherein the fuel cell dc converter internally comprises: a controller, a selection switch and a power conversion circuit which are electrically connected with the controller,
the selector switch is electrically connected with the charging input interface and the fuel cell input interface, the selector switch is also connected with the power conversion circuit, and the selector switch is used for switching the communication states of the charging input interface and the fuel cell input interface and the power conversion circuit according to a control instruction of the controller.
7. The electric vehicle power supply system of claim 6, further comprising a maximum power tracker disposed at the charging input interface, wherein the maximum power tracker operates when the charging input interface is connected to a photovoltaic array for charging.
8. A control method of an electric vehicle power supply system according to any one of claims 5 to 7, characterized by comprising:
the fuel cell supplies power to the drive motor through the fuel cell DC converter when the fuel cell is operating,
when the fuel cell stops running and the external charging power supply is connected with the charging input interface, the external charging power supply charges the power cell through the fuel cell direct current converter.
9. A control method of an electric vehicle power supply system according to claim 7, characterized by comprising:
the controller detects the operating state of the power supply system,
when the controller detects that the fuel cell operates, the controller controls the selector switch to act, so that the fuel cell is communicated with the power conversion circuit, and the fuel cell supplies power to the driving motor;
when the controller detects that the fuel cell is not operated and the external charging power supply is connected with the charging input interface, the controller controls the selection switch to act, so that the external charging power supply is communicated with the power conversion circuit and charges the power cell.
10. The method of claim 9, wherein the controller detects the type of the external charging power source when the external power source is in communication with the power conversion circuit,
when the external charging power supply is a direct current charging pile, the external charging power supply directly charges the power battery,
when the external charging power supply is a photovoltaic array, the maximum power tracker is started, and the power battery is charged after the power supply is processed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010023120.9A CN111114347A (en) | 2020-01-09 | 2020-01-09 | Fuel cell direct current converter, electric vehicle power supply system and control method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010023120.9A CN111114347A (en) | 2020-01-09 | 2020-01-09 | Fuel cell direct current converter, electric vehicle power supply system and control method |
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| CN111114347A true CN111114347A (en) | 2020-05-08 |
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| CN202010023120.9A Pending CN111114347A (en) | 2020-01-09 | 2020-01-09 | Fuel cell direct current converter, electric vehicle power supply system and control method |
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