CN110979039A - Bidirectional DC conversion device of automobile auxiliary power system of hydrogen fuel cell system - Google Patents
Bidirectional DC conversion device of automobile auxiliary power system of hydrogen fuel cell system Download PDFInfo
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- CN110979039A CN110979039A CN201911347920.XA CN201911347920A CN110979039A CN 110979039 A CN110979039 A CN 110979039A CN 201911347920 A CN201911347920 A CN 201911347920A CN 110979039 A CN110979039 A CN 110979039A
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- fuel cell
- cell system
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- 239000000446 fuel Substances 0.000 title claims abstract description 92
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 61
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 41
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 41
- 239000001257 hydrogen Substances 0.000 title claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims abstract description 27
- 230000001133 acceleration Effects 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 4
- 238000010248 power generation Methods 0.000 claims description 2
- 238000007689 inspection Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- B60L50/40—Electric propulsion with power supplied within the vehicle using propulsion power supplied by capacitors
-
- 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
- B60L7/00—Electrodynamic brake systems for vehicles in general
- B60L7/10—Dynamic electric regenerative braking
-
- 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
- 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 invention provides a bidirectional DC conversion device of an automobile auxiliary power system of a hydrogen fuel cell system, which specifically comprises: the system comprises a fuel cell system, a motor controller, a motor, a high-voltage power distribution PDU, a bidirectional DC converter and a super capacitor PACK; the low-voltage end of the bidirectional DC converter is connected with the fuel cell system, and the high-voltage end of the bidirectional DC converter is connected with the super capacitor PACK, so that the stability of the output voltage of the fuel cell system is met. The invention has the beneficial effects that: through two-way DC conversion device, can better realize hydrogen fuel car hundred kilometers and accelerate and experience and the high-efficient utilization of energy, and when braking and accelerating, the control of vehicle and travel can keep smooth and stable.
Description
Technical Field
The invention relates to the field of hydrogen energy automobiles, in particular to a bidirectional DC conversion device of an automobile auxiliary power system of a hydrogen fuel cell system.
Background
In recent years, as hydrogen fuel cell systems are developed and used in electric vehicles, other auxiliary power is required in addition to the main power source provided by the fuel cell systems. At present, the design of auxiliary power is mainly provided by adding various batteries or capacitors at the bus end in the market. In such applications, the bus terminal voltage is fluctuating and not a stable voltage value, and the bus voltage value is not controlled by the VCU vehicle controller, which is a hidden danger in the actual vehicle operation. In order to better stabilize the bus voltage at a certain value (based on the voltage value issued by the VCU vehicle controller), and to have good acceleration experience and efficient energy recycling, a proper converter is required to implement the function, and the bidirectional DC/DC converter is a necessary solution.
Disclosure of Invention
The invention provides a bidirectional DC conversion device of an automobile auxiliary power system of a hydrogen fuel cell system, aiming at solving the problems of a power system in an automobile of the existing hydrogen fuel cell system, so as to stabilize the bus terminal voltage of the fuel cell system.
The invention discloses a bidirectional DC conversion device of an automobile auxiliary power system of a hydrogen fuel cell system, which comprises the following components:
a fuel cell system, a bidirectional DC converter and a super capacitor PACK; the low-voltage end of the bidirectional DC converter is connected with the fuel cell system, and the high-voltage end of the bidirectional DC converter is connected with the super capacitor PACK and is used for converting electric energy in the acceleration and deceleration processes of the hydrogen fuel cell system automobile; the fuel cell system is used for providing main power of the automobile, and the super capacitor PACK is used for providing auxiliary power of the automobile.
Further, the bidirectional DC conversion device of the hydrogen fuel cell system automobile auxiliary power system further comprises a high-voltage power distribution PDU, a motor controller and a motor; one end of the high-voltage power distribution PDU is electrically connected with the fuel cell system, and the other end of the high-voltage power distribution PDU is electrically connected with the input end of the motor controller; the output end of the motor controller is electrically connected with the motor; the high-voltage distribution box PDU is used for energy distribution; the motor controller is used for controlling the motor.
Further, the bidirectional DC converter, the super capacitor PACK and the motor controller are electrically connected with a vehicle control unit of the hydrogen fuel cell system vehicle through a CAN bus.
Further, the bidirectional DC converter is used for electric energy conversion during acceleration and deceleration of the vehicle, wherein the acceleration process of the vehicle specifically includes the following steps:
s101: during the process of emergency acceleration of an automobile, an FCU fuel cell system controller in the fuel cell system detects an accelerator pedal signal, the fuel cell system outputs corresponding power, meanwhile, the bidirectional DC converter stably outputs according to a bus voltage value issued by CAN communication of a whole automobile controller, the output voltage is consistent with the voltage issued by the whole automobile controller, and meanwhile, the output voltage of the fuel cell system is also consistent with the output voltage of the bidirectional DC converter;
s102: the fuel cell system provides main power output to the motor through the high-voltage power distribution PDU and the motor controller, meanwhile, the super capacitor PACK provides auxiliary power output to the motor through the bidirectional DC converter, the high-voltage power distribution PDU and the motor controller, and in a common output mode of the main power and the auxiliary power, the bidirectional DC converter can keep the bus terminal voltage of the fuel cell system consistent with the acceleration control voltage issued by the whole vehicle controller and keep the output power of the motor controller stable.
Further, the bidirectional DC converter is used for electric energy conversion during acceleration and deceleration of the vehicle, wherein the deceleration of the vehicle specifically includes the following steps:
s201: when the automobile is decelerated and braked, the motor generates electricity and feeds the electric energy generated by the electricity generation back to the bus terminal of the fuel cell system, so that the bus terminal voltage of the fuel cell system is increased; meanwhile, the voltage value of the bidirectional DC converter, which is transmitted to the bidirectional DC converter by the communication between the bus voltage detected by the bidirectional DC converter and the CAN of the whole vehicle controller, exceeds a preset value;
s202: and the bidirectional DC converter feeds redundant electric energy generated by the power generation of the motor back to the super capacitor PACK for charging the super capacitor PACK, and simultaneously reduces the voltage of a bus terminal of the fuel cell system so as to keep the bus terminal voltage of the fuel cell system consistent with the control voltage sent to the bidirectional DC converter by the whole vehicle controller.
Further, the fuel cell system is a hydrogen fuel cell system.
And the bidirectional DC converter and the super capacitor PACK form an auxiliary power system of the hydrogen fuel automobile.
The technical scheme provided by the invention has the beneficial effects that: through two-way DC conversion device, can better realize hydrogen fuel car hundred kilometers and accelerate and experience and the high-efficient utilization of energy, and when braking and accelerating, the control of vehicle and travel can keep smooth and stable.
Drawings
FIG. 1 is a schematic diagram of a bi-directional DC converter of an automotive auxiliary power system with a hydrogen fuel cell system according to the present invention;
FIG. 2 is a flow chart of a hundred kilometer acceleration process of a bi-directional DC conversion device of an automotive auxiliary power system of a hydrogen fuel cell system in accordance with an embodiment of the present invention;
fig. 3 is a flow chart of the automobile deceleration process of the bidirectional DC converter of the automobile auxiliary power system with the hydrogen fuel cell system according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides a bidirectional DC conversion device of an auxiliary power system of a hydrogen fuel cell system vehicle:
the fuel cell system 1, the bidirectional DC converter 5, and the super capacitor PACK 6; the low-voltage end of the bidirectional DC converter 5 is connected with the fuel cell system 1, and the high-voltage end is connected with the super capacitor PACK6 and is used for converting electric energy in the acceleration and deceleration processes of the hydrogen fuel cell system automobile; the fuel cell system 1 is used for supplying main power of the automobile, and the super capacitor PACK6 is used for supplying auxiliary power of the automobile.
Further, the bidirectional DC conversion device of the hydrogen fuel cell system automobile auxiliary power system further comprises a high-voltage power distribution PDU2, a motor controller 3 and a motor 4; one end of the high-voltage power distribution PDU2 is electrically connected with the fuel cell system 1, and the other end of the high-voltage power distribution PDU2 is electrically connected with the input end of the motor controller 3; the output end of the motor controller 3 is electrically connected with the motor 4; the high-voltage distribution box PDU2 is used for energy distribution; the motor controller 3 is configured to control the motor 4.
Further, the bidirectional DC converter 5, the super capacitor PACK6 and the motor controller 3 are electrically connected to a vehicle controller of the hydrogen fuel cell system vehicle through a CAN bus.
Further, the bidirectional DC converter 5 is used for converting electric energy during acceleration and deceleration of the vehicle, wherein the acceleration process of the vehicle specifically includes the following steps:
s101: during the process of emergency acceleration of the automobile, the FCU fuel cell system controller in the fuel cell system 1 detects an accelerator pedal signal, the fuel cell system 1 outputs corresponding power, meanwhile, the bidirectional DC converter 5 CAN stably output according to a bus voltage value issued by CAN communication of the whole automobile controller, the output voltage is consistent with the voltage issued by the whole automobile controller, and meanwhile, the output voltage of the fuel cell system 1 is also consistent with the output voltage of the bidirectional DC converter;
s102: the fuel cell system 1 passes through the high-voltage power distribution PDU2 and the motor controller 3 provides main power output for the motor 4, meanwhile, the super capacitor PACK6 provides auxiliary power output for the motor 4 through the bidirectional DC converter 5, the high-voltage power distribution PDU2 and the motor controller 3, and in a common output mode of the main power and the auxiliary power, the bidirectional DC converter 5 can keep the bus terminal voltage of the fuel cell system 1 consistent with the acceleration control voltage issued by a whole vehicle controller, and meanwhile, the output power of the motor controller 3 is kept stable.
Further, the bidirectional DC converter 5 is used for converting electric energy during acceleration and deceleration of the vehicle, wherein the deceleration of the vehicle specifically includes the following steps:
s201: when the automobile is decelerated and braked, the motor 4 generates electricity and feeds the electricity generated by the electricity generation back to the bus terminal of the fuel cell system 1, so that the bus terminal voltage of the fuel cell system 1 is increased; meanwhile, the bidirectional DC converter 5 detects that the bus voltage is communicated with a Controller Area Network (CAN) of the whole vehicle, and the voltage value sent to the bidirectional DC converter exceeds a preset value;
s202: the bidirectional DC converter 5 feeds back the surplus electric energy generated by the electric power generated by the motor 4 to the super capacitor PACK6 for charging the super capacitor PACK6, and reduces the voltage at the bus terminal of the fuel cell system 1, so as to keep the bus terminal voltage of the fuel cell system 1 consistent with the control voltage sent by the vehicle controller to the bidirectional DC converter.
Further, the fuel cell system 1 is a hydrogen fuel cell system.
The bidirectional DC converter 5 and the super capacitor PACK6 form an auxiliary power system of the hydrogen fuel automobile.
The technical scheme provided by the invention has the beneficial effects that: through two-way DC conversion device, can better realize hydrogen fuel car hundred kilometers and accelerate and experience and the high-efficient utilization of energy, and when braking and accelerating, the control of vehicle and travel can keep smooth and stable.
In this document, the terms front, back, upper and lower are used to define the positions of the devices in the drawings and the positions of the devices relative to each other, and are used for the sake of clarity and convenience in technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A bidirectional DC conversion device of a hydrogen fuel cell system automobile auxiliary power system is characterized in that: the method specifically comprises the following steps: a fuel cell system (1), a bidirectional DC converter (5) and a super capacitor PACK (6); the low-voltage end of the bidirectional DC converter (5) is connected with the fuel cell system (1), and the high-voltage end of the bidirectional DC converter is connected with the super capacitor PACK (6) and is used for converting electric energy in the acceleration and deceleration processes of the hydrogen fuel cell system automobile; the fuel cell system (1) is used for providing main power of an automobile, and the super capacitor PACK (6) is used for providing auxiliary power of the automobile.
2. The bi-directional DC conversion device of an auxiliary power system for a hydrogen fuel cell system vehicle according to claim 1, wherein: the bidirectional DC conversion device of the hydrogen fuel cell system automobile auxiliary power system further comprises a high-voltage power distribution PDU (2), a motor controller (3) and a motor (4); one end of the high-voltage power distribution PDU (2) is electrically connected with the fuel cell system (1), and the other end of the high-voltage power distribution PDU is electrically connected with the input end of the motor controller (3); the output end of the motor controller (3) is electrically connected with the motor (4); the high-voltage distribution box PDU (2) is used for energy distribution; the motor controller (3) is used for controlling the motor (4).
3. A bi-directional DC conversion device of an auxiliary power system of a hydrogen fuel cell system as set forth in claim 2, wherein: the bidirectional DC converter (5), the super capacitor PACK (6) and the motor controller (3) are also electrically connected with a vehicle control unit of the hydrogen fuel cell system vehicle through a CAN bus; the fuel cell system (1) comprises a hydrogen fuel cell stack, an FCU fuel cell system controller, a patrol inspection control and a unidirectional DC.
4. A bi-directional DC conversion device of an auxiliary power system of a hydrogen fuel cell system according to claim 3, wherein: the bidirectional DC converter (5) is used for converting electric energy in the acceleration and deceleration process of the automobile, wherein the acceleration process of the automobile specifically comprises the following steps:
s101: during the process of emergency acceleration of an automobile, an FCU fuel cell system controller in the fuel cell system (1) detects an accelerator pedal signal, the fuel cell system (1) outputs corresponding power, meanwhile, the bidirectional DC converter (5) stably outputs according to a bus voltage value issued by CAN communication of a whole vehicle controller, the output voltage is consistent with the voltage issued by the whole vehicle controller, and meanwhile, the output voltage of the fuel cell system (1) is also consistent with the output voltage of the bidirectional DC converter;
s102: the fuel cell system (1) passes through the high-voltage power distribution PDU (2) and the motor controller (3) to the motor (4) provides main power output, and simultaneously the super capacitor PACK (6) passes through the bidirectional DC converter (5), the high-voltage power distribution PDU (2) and the motor controller (3) provide auxiliary power output to the motor (4), so that the main power and the auxiliary power are output together, the bidirectional DC converter (5) can keep the bus terminal voltage of the fuel cell system (1) consistent with the acceleration control voltage issued by the whole vehicle controller, and simultaneously keep the output power of the motor controller (3) stable.
5. A bi-directional DC conversion device of an auxiliary power system of a hydrogen fuel cell system according to claim 3, wherein: the bidirectional DC converter (5) is used for converting electric energy in the acceleration and deceleration process of the automobile, wherein the deceleration process of the automobile specifically comprises the following steps:
s201: when the automobile is decelerated and braked, the motor (4) generates electricity, and the electric energy generated by the electricity generation is fed back to the bus terminal of the fuel cell system (1), so that the bus terminal voltage of the fuel cell system (1) is increased; meanwhile, the bidirectional DC converter (5) detects that the bus voltage is communicated with a Controller Area Network (CAN) of the whole vehicle, and the voltage value sent to the bidirectional DC converter exceeds a preset value;
s202: and the bidirectional DC converter (5) feeds back redundant electric energy generated by the power generation of the motor (4) to the super capacitor PACK (6) for charging the super capacitor PACK (6), and simultaneously reduces the voltage of a bus terminal of the fuel cell system (1) so as to keep the bus terminal voltage of the fuel cell system (1) consistent with the control voltage sent to the bidirectional DC converter by the whole vehicle controller.
6. A bi-directional DC conversion device of an auxiliary power system of a hydrogen fuel cell system as set forth in claim 2, wherein:
the energy distribution of the high-voltage distribution box PDU (2) specifically comprises the following steps: coordinating an energy distribution comprising the motor controller (3), other electrical devices of the hydrogen fuel cell system vehicle and a bi-directional DC converter (5); wherein the other power consuming device comprises: vehicle air conditioner, air compressor machine and PTC.
7. The bi-directional DC conversion device of an auxiliary power system for a hydrogen fuel cell system vehicle according to claim 1, wherein: the fuel cell system (1) is a hydrogen fuel cell system.
8. A bi-directional DC conversion device of an auxiliary power system of a hydrogen fuel cell system as set forth in claim 1, wherein: and the bidirectional DC converter (5) and the super capacitor PACK (6) form an auxiliary power system of the hydrogen fuel automobile.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911347920.XA CN110979039A (en) | 2019-12-24 | 2019-12-24 | Bidirectional DC conversion device of automobile auxiliary power system of hydrogen fuel cell system |
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| CN201911347920.XA CN110979039A (en) | 2019-12-24 | 2019-12-24 | Bidirectional DC conversion device of automobile auxiliary power system of hydrogen fuel cell system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112260920A (en) * | 2020-12-21 | 2021-01-22 | 武汉格罗夫氢能汽车有限公司 | Network topology structure of hydrogen fuel cell system |
| CN112297888A (en) * | 2020-10-22 | 2021-02-02 | 武汉格罗夫氢能汽车有限公司 | Hydrogen energy automobile power system containing auxiliary energy |
| CN112606710A (en) * | 2020-12-14 | 2021-04-06 | 武汉格罗夫氢能汽车有限公司 | System and method for realizing output control of bidirectional DCDC (direct current) of fuel cell auxiliary energy system |
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