CN108482172B - Three-in-one vehicle-mounted DCDC integrated power supply - Google Patents

Three-in-one vehicle-mounted DCDC integrated power supply Download PDF

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Publication number
CN108482172B
CN108482172B CN201810501658.9A CN201810501658A CN108482172B CN 108482172 B CN108482172 B CN 108482172B CN 201810501658 A CN201810501658 A CN 201810501658A CN 108482172 B CN108482172 B CN 108482172B
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controller
converter
fuel cell
vehicle
power supply
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CN201810501658.9A
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CN108482172A (en
Inventor
蒋文功
周金博
孙丽
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Wetown Electric Group Co Ltd
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Wetown Electric Group Co Ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION 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
    • B60L58/00Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/40Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for controlling a combination of batteries and fuel cells
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles

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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 three-in-one vehicle-mounted DCDC integrated power supply is characterized in that a fuel cell controller, a fuel cell air compressor and a fuel cell engine of a vehicle-mounted fuel cell system are respectively connected with a three-stage DC/DC converter, the three-stage DC/DC converters share the same integrated port and are connected with a power battery, 3 power supplies with different power levels and different voltage ranges can be simultaneously provided, the power supplies work cooperatively, the operation is stable, the use requirements of different powers are met, the wiring harness arrangement and assembly of the whole vehicle are convenient, the structure is simple, the occupied space is small, the installation wiring and the control operation are convenient, the cost is low, and the three-in-one vehicle-mounted DCDC integrated power supply is suitable for the requirements of integrated design and intelligent control.

Description

Three-in-one vehicle-mounted DCDC integrated power supply
Technical Field
The invention relates to a three-in-one vehicle-mounted DCDC integrated power supply.
Background
With the continuous and prominent environmental pollution problem, the traditional petroleum energy source can not meet the power demand of the current automobile industry, and the fuel cell with excellent performance is widely regarded as the best choice of the energy source scheme of the future electric automobile; the fuel cell is a power generation device which directly converts chemical energy existing in fuel and oxidant into electric energy, the fuel of the hydrogen fuel cell is hydrogen and oxygen, and the reaction product of the hydrogen fuel cell is only water, so that the hydrogen fuel cell automobile achieves zero emission and zero pollution in a real sense.
Since the output voltage of the hydrogen fuel cell is low, the fluctuation is large, and the output characteristic is relatively soft; if the fuel cell is used as a direct driving power supply of an electric automobile, a DC-DC converter with harder output characteristics is connected after the fuel cell, a unified power supply is formed by the fuel cell and the DC-DC converter to supply power to the whole automobile, the unstable direct current low voltage output by the fuel cell is converted into stable high voltage by the DC-DC power supply and stored in the power cell, the power cell system is required to provide an auxiliary power supply of 12V for the fuel cell controller in advance before starting, the high voltage output by the power cell is required to be converted into direct current of 12V by the DC-DC power supply so as to provide power for the fuel cell controller, and the air compressor of the fuel cell is required to provide working voltage of 300V to 375V after the fuel cell controller is powered on.
Disclosure of Invention
The invention aims to solve the technical problem of providing the three-in-one vehicle-mounted DCDC integrated power supply which can simultaneously meet the use requirements of different powers, has the advantages of simple structure, small occupied space, convenient installation and wiring manufacture and low cost.
The invention relates to a three-in-one vehicle-mounted DCDC integrated power supply, which is characterized in that: the three-stage DC/DC converter is respectively a first DC/DC converter capable of converting electric energy of the power battery system into 12V direct current to be output to drive the fuel battery controller to start, a second DC/DC converter capable of converting electric energy of the power battery system into 300V-375V direct current to drive the fuel battery air compressor to work and a third DC/DC converter capable of converting 100V-400V direct current output by the fuel battery engine into 450V-750V stable direct current to be output to the power battery system; the input ends of the first DC/DC converter, the second DC/DC converter and the output end of the third DC/DC converter are simultaneously connected to the power battery system, the output end of the first DC/DC converter is connected to the fuel battery controller, the output end of the second DC/DC converter is connected to the fuel battery air compressor, and the input end of the third DC/DC converter is connected to the fuel battery engine; the power battery system is connected to the motor through a motor controller, the fuel battery system, the motor and the three-stage DC/DC converter are connected with the controller, and the controller is connected to the automobile bus through CAN communication;
the input ends of the first DC/DC converter and the second DC/DC converter share the same integrated port connected with the power battery terminal with the output end of the third DC/DC converter;
the controller does not comprise a whole vehicle controller which is connected with the motor and can control the start and stop of the motor, and the whole vehicle controller is simultaneously connected to a fuel cell controller in a fuel cell system of the fuel cell system and a DC/DC controller which can control the three-stage DC/DC converter to work respectively;
and the communication between the DC/DC controller and the whole vehicle controller and between the DC/DC controller and the fuel cell controller is realized through CAN protocol communication.
The controller is connected with an auxiliary power supply;
the controller is also directly connected to the fuel cell controller of the fuel cell and the three stage DC/DC converter through the drive circuit.
The three-in-one vehicle-mounted DCDC integrated power supply is characterized in that a fuel cell controller, a fuel cell air compressor and a fuel cell engine of a vehicle-mounted fuel cell system are respectively connected with a three-stage DC/DC converter, the three-stage DC/DC converters share the same integrated port and are connected with a power battery, 3 power supplies with different power levels and different voltage ranges can be simultaneously provided, the power supplies work cooperatively, the operation is stable, the use requirements of different powers are met, the wiring harness arrangement and assembly of the whole vehicle are convenient, the structure is simple, the occupied space is small, the installation wiring and the control operation are convenient, the cost is low, and the three-in-one vehicle-mounted DCDC integrated power supply is suitable for the requirements of integrated design and intelligent control.
Drawings
FIG. 1 is a schematic diagram of a frame structure of a whole vehicle power system of a three-in-one vehicle-mounted DCDC integrated power supply according to an embodiment of the invention;
FIG. 2 is a schematic diagram of the energy flow of a three-in-one vehicle DCDC integrated power supply according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a system control principle of a three-in-one vehicle-mounted DCDC integrated power supply according to an embodiment of the present invention.
Detailed Description
As shown in the figure, the three-in-one vehicle-mounted DCDC integrated power supply comprises three-stage DC/DC converters connected in parallel between a vehicle-mounted fuel cell system and a power cell system, wherein the three-stage DC/DC converters are respectively a first DC/DC converter DC/DC1 capable of converting electric energy of the power cell system into 12V direct current and outputting the 12V direct current to drive a fuel cell controller to start, a second DC/DC converter DC/DC2 capable of converting electric energy of the power cell system into 300V-375V direct current to drive a fuel cell air compressor to work, and a third DC/DC converter DC/DC3 capable of converting 100V-400V direct current output by a fuel cell engine into 450V-750V stable direct current and outputting the 450V stable direct current to the power cell system; the input ends of the first DC/DC converter DC/DC1 and the second DC/DC converter DC/DC2 and the output end of the third DC/DC converter DC/DC3 are simultaneously connected to the power battery system, the input ends of the first DC/DC converter DC/DC1 and the second DC/DC converter DC/DC2 and the output end of the third DC/DC converter DC/DC3 share the same integrated port connected with the power battery terminal, and the three-stage DC/DC converter is integrated into an integrated structure through the integrated port, so that intelligent installation and control are facilitated; the output end of the first DC/DC converter DC/DC1 is connected to the fuel cell controller, the output end of the second DC/DC converter DC/DC2 is connected to the fuel cell air compressor, and the input end of the third DC/DC converter DC/DC3 is connected to the fuel cell engine; the power battery system is connected to the motor through a motor controller, the fuel battery system, the motor and the three-stage DC/DC converter are connected with the controller, and the controller is connected to the automobile bus through CAN communication;
the controller comprises a whole vehicle controller which is connected with the motor and can control the start and stop of the motor, and the whole vehicle controller is simultaneously connected to a fuel cell controller in a fuel cell system of the fuel cell system and a DC/DC controller which can control the three-stage DC/DC converter to work respectively;
the communication between the DC/DC controller and the whole vehicle controller and the fuel cell controller is realized through CAN protocol.
The controller is connected with an auxiliary power supply;
the controller is also directly connected to the fuel cell controller of the fuel cell and the three-stage DC/DC converter through the driving circuit.
The three-in-one vehicle-mounted DCDC integrated power supply is characterized in that a fuel cell controller, a fuel cell air compressor and a fuel cell engine of a vehicle-mounted fuel cell system are respectively connected with a three-stage DC/DC converter, the three-stage DC/DC converters share the same integrated port and are connected with a power battery, 3 power supplies with different power levels and different voltage ranges can be simultaneously provided, the power supplies work cooperatively, the operation is stable, the use requirements of different powers are met, the wiring harness arrangement and assembly of the whole vehicle are convenient, the structure is simple, the occupied space is small, the installation wiring and the control operation are convenient, the cost is low, and the three-in-one vehicle-mounted DCDC integrated power supply is suitable for the requirements of integrated design and intelligent control.
The specific technical scheme is as follows: integrating 3 DC/DC power supplies with different power requirements and different voltage conversion requirements into a system;
1. the 3-level DC/DC converter is integrated to form an integrated structure, so that the number and the installation steps of a packaging shell, a plug connector and a wire harness part are reduced, and meanwhile, the electrical connection reliability is improved; the integrated system has the advantages of simple structure, simplified process, low manufacturing cost and convenient installation, is beneficial to the arrangement and assembly of the whole wire harness and can improve the economic benefit;
2. the integrated design, intelligent control, collaborative work between each power, control is more reasonable, safety.
The power supply can provide 3 power supplies with different power classes and different voltage ranges, the power supplies work cooperatively to promote the stability of a power system of the fuel cell electric vehicle, and the DC/DC3 power supply has the function of converting unstable low voltage output by the hydrogen fuel cell into stable high voltage to charge the power cell, and the power cell drives the motor controller again. The DC/DC2 power supply provides an auxiliary power supply for the fuel cell controller, and the DC/DC1 power supply provides a driving power supply for the fuel cell controller.
The fuel cell system requires 3 DC/DC converters in total to complete energy conversion; firstly, converting the electricity of a power battery into 12V direct current through DC/DC1, and outputting the 12V direct current to drive a fuel battery controller to start; then, the electricity of the power battery is converted into direct current of about 300V-375V through DC/DC2, and the air compressor of the fuel battery is driven to work. Finally, the fuel cell engine emits direct current of about 100V-400V, and then the direct current is boosted by DC/DC3 and converted into adjustable stable direct current for output, the adjustable range is 450V-750V, and the energy is stored in the power cell; the power battery drives the motor controller to work and drives the motor to work.
The input end of the DC/DC2 and the input end of the DC/DC1 and the output end of the DC/DC3 share 1 port, and are connected with a power battery, and the integration of 3 DC/DC power supplies is completed through the terminal of the common power battery. And meanwhile, the DC/DC1 and the DC/DC2 flow energy from the power battery to the fuel battery system, the DC/DC3 flows energy from the fuel battery to the power battery, and the energy of the 3 types of DC/DC power supplies flows unidirectionally.

Claims (6)

1. The utility model provides a on-vehicle DCDC integrated power supply of trinity which characterized in that: the three-stage DC/DC converter is respectively a first DC/DC converter capable of converting electric energy of the power battery system into 12V direct current to be output to drive the fuel battery controller to start, a second DC/DC converter capable of converting electric energy of the power battery system into 300V-375V direct current to drive the fuel battery air compressor to work and a third DC/DC converter capable of converting 100V-400V direct current output by the fuel battery engine into 450V-750V stable direct current to be output to the power battery system; the input ends of the first DC/DC converter, the second DC/DC converter and the output end of the third DC/DC converter are simultaneously connected to the power battery system, the output end of the first DC/DC converter is connected to the fuel battery controller, the output end of the second DC/DC converter is connected to the fuel battery air compressor, and the input end of the third DC/DC converter is connected to the fuel battery engine; the power battery system is connected to the motor through the motor controller, the fuel battery system, the motor and the three-stage DC/DC converter are connected with the controller, and the controller is connected to the automobile bus through CAN communication.
2. The three-in-one vehicle-mounted DCDC integrated power supply of claim 1, wherein: the input ends of the first DC/DC converter and the second DC/DC converter share the same integrated port connected with the power battery terminal with the output end of the third DC/DC converter.
3. The three-in-one vehicle-mounted DCDC integrated power supply of claim 1, wherein: the controller comprises a whole vehicle controller which is connected with the motor and can control the motor to start and stop, and the whole vehicle controller is simultaneously connected to a fuel cell controller in a fuel cell system of the fuel cell system and a DC/DC controller which can control the three-stage DC/DC converter to work respectively.
4. A three-in-one vehicle-mounted DCDC integrated power supply according to claim 3, wherein: and the communication between the DC/DC controller and the whole vehicle controller and between the DC/DC controller and the fuel cell controller is realized through CAN protocol communication.
5. The three-in-one vehicle-mounted DCDC integrated power supply of claim 1, wherein: the controller is connected with an auxiliary power supply.
6. The three-in-one vehicle-mounted DCDC integrated power supply of claim 1, wherein: the controller is also directly connected to a fuel cell controller and a three stage DC/DC converter within the fuel cell system through a drive circuit.
CN201810501658.9A 2018-05-23 2018-05-23 Three-in-one vehicle-mounted DCDC integrated power supply Active CN108482172B (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110293918A (en) * 2019-05-08 2019-10-01 武汉格罗夫氢能汽车有限公司 A kind of integrated DCDC system of hydrogen cell automobile
CN112054501A (en) * 2020-09-01 2020-12-08 东风汽车集团有限公司 Fuel cell double-high-voltage power supply and power supply system based on high-power requirement
CN115863792A (en) * 2022-11-24 2023-03-28 如果新能源科技(江苏)股份有限公司 Configuration method of battery system and electronic terminal equipment

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