CN214396436U - High-voltage topological structure for fuel cell vehicle - Google Patents

High-voltage topological structure for fuel cell vehicle Download PDF

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Publication number
CN214396436U
CN214396436U CN202120272553.8U CN202120272553U CN214396436U CN 214396436 U CN214396436 U CN 214396436U CN 202120272553 U CN202120272553 U CN 202120272553U CN 214396436 U CN214396436 U CN 214396436U
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fuel cell
voltage
power
converter
air compressor
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马艳红
纪永飞
陈首刚
张鹏
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FAW Jiefang Automotive Co Ltd
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FAW Jiefang Automotive Co Ltd
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    • 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
    • Y02T90/40Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

The utility model discloses a high-pressure topological structure for fuel cell vehicle. The structure comprises a power battery system, a first high-voltage power distribution device, a power motor system, a PTC system, a water pump system, an air compressor DC/DC converter system, a fuel cell DC/DC converter system, a second high-voltage power distribution device, a fuel cell stack system and a whole vehicle control device; the power battery system and the fuel cell stack system provide energy for the power motor system; the fuel cell DC/DC converter system reduces the voltage output by the fuel cell stack system and then transmits the voltage to the power motor and the power battery system; the PTC system, the water pump system and the air compressor system respectively heat the fuel cell stack system, provide water circulation and provide reaction gas; the air compressor DC/DC converter system converts the voltage output by the power battery system into the voltage required by the work of the air compressor system; the whole vehicle control device controls the on-off of the first high-voltage distribution device and the second high-voltage distribution device so as to control the on-off of the whole vehicle and the energy distribution of the whole vehicle.

Description

High-voltage topological structure for fuel cell vehicle
Technical Field
The embodiment of the utility model provides a relate to the fuel cell technique, especially relate to a high-pressure topological structure for fuel cell car.
Background
With the gradual maturity of pure electric vehicle technology, the problems of pure electric vehicles are gradually exposed, such as the problem of fire and explosion of power batteries, the short service life of power batteries (generally, the service life of a vehicle is only 5 years to 8 years), the replacement of power batteries of long-distance vehicles, and environmental problems caused by the preparation and recycling of materials of power batteries. At present, the scheme of the whole fuel cell vehicle is gradually increased, particularly, the scheme has obvious advantages in the field of long-distance commercial vehicles, for example, heavy trucks in charge of transportation, the fuel cell is adopted, so that the fuel cell is not required to be frequently replaced in the transportation process, only fuel is required to be filled, and the transportation efficiency of the long-distance commercial vehicles is greatly improved. The high-voltage topological scheme design and the power-on and power-off control method of the fuel cell vehicle directly relate to the safety, comfort and reliability of the whole vehicle.
In the prior art, the high-voltage topological scheme of the fuel cell vehicle has poor safety and reliability.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a high-pressure topological structure for fuel cell car can realize the coordinated operation of each high-voltage system of fuel cell car safe and reliable's to the electricity and energy distribution about realizing whole car safe and reliable's.
In a first aspect, an embodiment of the present invention provides a high-voltage topology structure for a fuel cell vehicle, which includes a power battery system, a first high-voltage power distribution device, a power motor system, a PTC system, a water pump system, an air compressor DC/DC converter system, a fuel cell DC/DC converter system, a second high-voltage power distribution device, a fuel cell stack system, and a vehicle control device;
the power battery system is electrically connected with the power motor system in parallel through the first high-voltage power distribution device;
the power battery system is used for providing a first type of energy for the power motor system;
the power motor system is used for realizing the driving running of the whole vehicle;
the fuel cell stack system is used for providing a second type of energy for the power motor system;
the fuel cell stack system is electrically connected in parallel with the fuel cell DC/DC converter system through the second high-voltage power distribution device;
the fuel cell DC/DC converter system is used for carrying out voltage reduction treatment on the voltage output by the fuel cell stack system and then unidirectionally conveying the voltage to the power motor system and the power battery system;
the PTC system, the water pump system, the air compressor system and the air compressor DC/DC converter system are electrically connected with the power motor system and the fuel cell DC/DC converter system in parallel;
the PTC system is used for heating the fuel cell stack system;
the water pump system is used for providing water circulation for the fuel cell stack system;
the air compressor system is used for providing reaction gas for the fuel cell stack system;
the air compressor DC/DC converter system is used for converting the voltage output by the power battery system into the voltage required by the work of the air compressor system;
the whole vehicle control device is in communication connection with the power battery system, the power motor system, the PTC system, the water pump system, the air compressor DC/DC converter system and the fuel cell DC/DC converter system, the whole vehicle control device is electrically connected with the first high-voltage power distribution device and the first high-voltage power distribution device,
and the whole vehicle control device is used for controlling the on-off of the first high-voltage power distribution device and the second high-voltage power distribution device according to the state information of the power battery system, the power motor system, the PTC system, the water pump system, the air compressor DC/DC converter system and the fuel battery DC/DC converter system so as to control the on-off of the whole vehicle and control the energy distribution of the whole vehicle.
Optionally, the first high-voltage power distribution device includes a power battery main positive relay, a power battery main negative relay, a power motor relay, and a power motor pre-charging resistor;
the power motor relay and the power motor pre-charging resistor are electrically connected between a first output end of the power battery system and a first input end of the power motor system in series, and the power motor relay and the power motor pre-charging resistor form a power motor system pre-charging loop;
the power battery main positive relay is electrically connected between the first output end of the power battery system and the first input end of the power motor system in series;
the power battery main and negative relays are electrically connected in series with a second output end of the power battery system and a second input end of the power motor system;
the whole vehicle control device is used for controlling the power motor relay and the power battery main and negative relays to be closed so as to supply the power motor system with pre-charging;
and the power battery main and positive relay is also used for controlling the power motor relay to be disconnected and controlling the power battery main and positive relay to be closed so as to supply power to the power motor system normally.
Optionally, the second high-voltage power distribution device includes a fuel cell stack main positive relay, a fuel cell stack main negative relay, a fuel cell DC/DC converter main positive relay, a fuel cell DC/DC converter pre-charging relay, and a fuel cell DC/DC converter pre-charging resistor;
the fuel cell DC/DC converter pre-charging relay, the fuel cell DC/DC converter pre-charging resistor and the fuel cell stack main positive relay are sequentially and electrically connected in series with a first output end of the fuel cell stack system and a first input end of the fuel cell DC/DC converter system; the fuel cell DC/DC converter pre-charging relay, the fuel cell DC/DC converter pre-charging resistor and the fuel cell stack main positive relay form a fuel cell DC/DC converter system pre-charging loop;
the fuel cell DC/DC converter main positive relay is connected in parallel between the fuel cell DC/DC converter pre-charging relay and the fuel cell DC/DC converter pre-charging resistor;
the fuel cell stack main and negative relays are connected in series with a second output end of the fuel cell stack system and a second input end of the fuel cell DC/DC converter system;
the whole vehicle control device is used for controlling the closing of the fuel cell DC/DC converter pre-charging relay, the fuel cell pile main positive relay and the fuel cell pile main negative relay so as to pre-charge the fuel cell DC/DC converter system;
the control circuit is also used for controlling a pre-charging relay of the fuel cell DC/DC converter to be switched off and controlling a main positive relay of the fuel cell DC/DC converter, a main positive relay of the fuel cell stack and a main negative relay of the fuel cell stack to be switched on so as to supply power to the fuel cell DC/DC converter system normally.
Optionally, the power battery system comprises a power battery pack and a power battery pack controller; the power battery pack controller is electrically connected with the power battery pack and is in communication connection with the finished automobile control device;
the power battery pack is used for providing electric energy for the power motor system and storing the electric energy;
and the power battery pack controller is used for monitoring and reporting the voltage state information of the power battery pack to the vehicle control device.
Optionally, the power motor system includes a power motor and a power motor controller;
the input end of the power motor controller is electrically connected with the power battery system, and the output end of the power motor controller is electrically connected with the power motor; the power motor controller is in communication connection with the whole vehicle control device;
the power motor controller is used for converting the direct current output by the power battery system into alternating current to be supplied to the power motor; the vehicle control device is also used for monitoring and uploading the state information of the power motor to the vehicle control device;
and the power motor is used for providing power output for the whole vehicle.
Optionally, the fuel cell DC/DC converter system includes a DC-to-DC conversion circuit and a fuel cell DC/DC converter controller;
the input end of the direct current-to-direct current conversion circuit is electrically connected with the fuel cell stack system, and the output end of the direct current-to-direct current conversion circuit is electrically connected with the fuel cell DC/DC converter controller; the fuel cell DC/DC converter controller is in communication connection with the whole vehicle control device;
the direct current-to-direct current conversion circuit is used for carrying out voltage reduction processing on the voltage output by the fuel cell stack system and then unidirectionally transmitting the voltage to the power motor system and the power battery system;
and the fuel cell DC/DC converter controller is used for monitoring and reporting voltage information output by the DC-to-DC conversion circuit to the vehicle control device.
Optionally, the air compressor system includes an air compressor and an air compressor controller;
the air compressor controller is respectively electrically connected with the power battery system and the air compressor, and the air compressor controller is in communication connection with the whole vehicle control device;
the air compressor controller is used for converting direct current output by the power battery system into alternating current to supply the air compressor to work; the air compressor is also used for monitoring and uploading state information of the air compressor to the vehicle control device;
and the air compressor is used for providing reaction gas for the fuel cell stack system.
Optionally, the air compressor DC/DC system includes a bidirectional voltage reduction circuit and an air compressor DC/DC controller;
the air compressor DC/DC controller is respectively and electrically connected with the power battery system and the bidirectional voltage reduction circuit, and is in communication connection with the whole vehicle control device;
the bidirectional voltage reduction circuit is used for reducing the voltage output by the power battery system so as to enable the air compressor to work;
and the air compressor DC/DC controller is used for monitoring and uploading voltage information output by the bidirectional voltage reduction circuit to the whole vehicle control device.
Optionally, the water pump system includes a water pump, a water pump fuse, and a water pump controller; the water pump controllers are electrically connected with the water pump and the water pump fuse, and the water pump controllers are in communication connection with the whole vehicle control device;
the water pump is used for providing water circulation for the fuel cell stack system;
the water pump controller is used for monitoring and uploading state information of the water pump to the vehicle control device; the water pump fuse is also used for disconnecting the water pump fuse according to the state information of the water pump so as to protect the water pump;
the PTC system comprises a PTC, a PTC fuse and a PTC controller; the PTC controllers are electrically connected with the PTC and the PTC fuse; the PTC controller is in communication connection with the whole vehicle control device;
the PTC is used for heating the fuel cell stack system;
the PTC controller is used for monitoring and reporting the state information of the PTC to the vehicle control device; and also for disconnecting the PTC fuse to protect the PTC according to the state information of the PTC.
Optionally, the whole vehicle control device is used for controlling the first high-voltage distribution device and the second high-voltage distribution device to control the whole vehicle to power on and power off and control the whole vehicle energy distribution, and specifically comprises:
and the whole vehicle control device is used for controlling the on-off of the first high-voltage distribution device and the second high-voltage distribution device so as to control the on-off of the whole vehicle and the energy distribution of the whole vehicle according to the voltage state information of the power battery pack, the state information of the power motor, the voltage information output by the direct current-to-direct current conversion circuit, the state information of the air compressor, the voltage information output by the bidirectional voltage reduction circuit, the state information of the water pump and the state information of the PTC.
The utility model discloses a high-voltage topological structure for a medium fuel cell vehicle comprises a power battery system, a first high-voltage power distribution device, a power motor system, a PTC system, a water pump system, an air compressor DC/DC converter system, a fuel cell DC/DC converter system, a second high-voltage power distribution device, a fuel cell stack system and a whole vehicle control device; the technical scheme provides energy for the power motor system through the power battery system and the fuel cell stack system; the fuel cell DC/DC converter system reduces the voltage output by the fuel cell stack system and then transmits the voltage to the power motor and the power battery system; the PTC system, the water pump system and the air compressor system respectively heat the fuel cell stack system, provide water circulation and provide reaction gas; the air compressor DC/DC converter system converts the voltage output by the power battery system into the voltage required by the work of the air compressor system; therefore, the coordination work of each high-voltage system of the fuel cell vehicle can be safely and reliably realized; the whole vehicle control device controls the first high-voltage distribution device and the second high-voltage distribution device to be switched on and off, and safe and reliable power supply and energy distribution of the whole vehicle are realized. The problems that in the prior art, the high-voltage topology design scheme of the fuel cell vehicle is poor in safety and reliability and the like are solved.
Drawings
Fig. 1 is a schematic diagram of a high-voltage topology for a fuel cell vehicle according to an embodiment of the present invention;
fig. 2 is a schematic diagram of another high-voltage topology for a fuel cell vehicle according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic diagram of a high-voltage topology structure for a fuel cell vehicle provided by an embodiment of the present invention, as shown in fig. 1, the high-voltage topology structure for the fuel cell vehicle includes a power battery system 10, a first high-voltage power distribution device 20, a power motor system 30, a PTC system 40, a water pump system 50, an air compressor system 60, an air compressor DC/DC converter system 70, a fuel cell DC/DC converter system 80, a second high-voltage power distribution device 90, a fuel cell stack system 100, and a vehicle control device (not shown in the figure); the power battery system 10 is electrically connected with the power motor system 30 in parallel through a first high-voltage power distribution device 20; the power battery system 10 is used for providing a first type of energy for the power motor system 30; the power motor system 30 is used for realizing the driving running of the whole vehicle; a fuel cell stack system 100 for providing a second type of energy source to the power motor system 30; the fuel cell stack system 100 is electrically connected in parallel with the fuel cell DC/DC converter system 80 via the second high voltage power distribution device 90; the fuel cell DC/DC converter system 80 is used for carrying out voltage reduction processing on the voltage output by the fuel cell stack system 100 and then unidirectionally conveying the voltage to the power motor system 30 and the power battery system 10; the PTC system 40, the water pump system 50, the air compressor system 60 and the air compressor DC/DC converter system 70 are electrically connected in parallel with the power motor system 30 and the fuel cell DC/DC converter system 80; a PTC system 40 for heating the fuel cell stack system 100; a water pump system 50 for providing water circulation to the fuel cell stack system 100; an air compressor system 60 for providing reactant gas to the fuel cell stack system 100; an air compressor DC/DC converter system 70 for converting the voltage output by the power battery system 10 into the voltage required by the operation of the air compressor system 60; the whole vehicle control device is in communication connection with the power battery system 10, the power motor system 30, the PTC system 40, the water pump system 50, the air compressor system 60, the air compressor DC/DC converter system 70 and the fuel cell DC/DC converter system 80, the whole vehicle control device is electrically connected with the first high-voltage power distribution device 20 and the first high-voltage power distribution device 90, and the whole vehicle control device is used for controlling the on-off of the first high-voltage power distribution device 20 and the second high-voltage power distribution device 90 according to the state information of the power battery system 10, the power motor system 30, the PTC system 40, the water pump system 50, the air compressor system 60, the air compressor DC/DC converter system 70 and the fuel cell DC/DC converter system 80 so as to control the on-off of the whole vehicle and control the energy distribution of the whole vehicle.
The power battery system 10 in the fuel cell vehicle is used as a first type of energy to provide energy for the power motor system 30; the fuel cell stack system 100 serves as a second type of energy source to provide energy for the power motor system 30; the whole vehicle control device can control the on-off of the first high-voltage distribution device 20 and the second high-voltage distribution device 90 according to the state information of each high-voltage component so as to control the energy distribution of various energy sources; for example, the vehicle control device controls the first high-voltage power distribution device 20 to close to enable the power battery system 10 to supply power to the power motor system 30; the whole vehicle control device controls the second high-voltage power distribution device 90 to be closed so as to realize that the fuel cell stack system 100 supplies power for the power motor system 30; meanwhile, when the first high-voltage power distribution device 20 is closed, energy is output to the power battery system 10 in a single direction. The operation of the high-voltage components of the PTC system 40, the water pump system 50, the air compressor system 60, the air compressor DC/DC converter system 70, and the fuel cell DC/DC converter system 80 can be coordinated to ensure safe and reliable normal operation of the fuel cell stack system 100. According to the technical scheme, the power battery system 10, the PTC system 40, the water pump system 50, the air compressor system 60, the air compressor DC/DC converter system 70, the fuel cell DC/DC converter system 80 and the fuel cell stack system 100 are used for high-voltage components of each fuel cell, so that the power supply requirement of the hybrid power battery for the fuel cell vehicle is met, the coordination work of the high-voltage components of the fuel cell vehicle is safely and reliably realized, and the functions of the components of the high-voltage system for the fuel cell vehicle in the high-voltage system are reliably completed.
Optionally, on the basis of the foregoing embodiment, further, fig. 2 is a schematic diagram of another high-voltage topology for a fuel cell vehicle according to an embodiment of the present invention; as shown in fig. 2, the first high-voltage distribution device 20 includes a power battery main positive relay 21, a power battery main negative relay 22, a power motor relay 23 and a power motor pre-charging resistor 24; a power motor relay 23 and a power motor pre-charging resistor 24 are electrically connected in series between a first output end of the power battery system 10 and a first input end of the power motor system 30, and the power motor relay 23 and the power motor pre-charging resistor 24 form a power motor system pre-charging loop; the power battery main positive relay 21 is electrically connected in series between a first output end of the power battery system 10 and a first input end of the power motor system 30; the power battery main and negative relay 22 is electrically connected in series with a second output end of the power battery system 10 and a second input end of the power motor system 30; the whole vehicle control device is used for controlling the power motor relay 23 and the power battery main and negative relay 22 to be closed so as to supply the power motor system 30 with pre-charging; and the power motor relay 23 is also used for controlling to be switched off, and the power battery main positive relay 21 and the power battery main positive relay 22 are controlled to be switched on so as to supply power to the power motor system normally.
The power battery system 10 controls the first high-voltage power distribution device 20 to be closed through a finished automobile control device so as to power the power motor system 30; in the process that the power battery system 10 supplies power to the power motor system 30, the power battery main and negative relays 22 and the power motor relay 23 are closed; a power motor system pre-charging loop formed by a power battery main negative relay 23 and a power motor pre-charging resistor 24 is conducted; because the high voltage born by the power motor pre-charging resistor 24 is limited, after the power battery system 10 is pre-charged for a period of time, the power motor relay 23 is disconnected, and the power battery main positive relay 21 is closed, so that the power motor system 30 can be safely and normally powered.
Optionally, referring to fig. 2, the second high-voltage power distribution device 90 includes a fuel cell stack main positive relay 91, a fuel cell stack main negative relay 92, a fuel cell DC/DC converter main positive relay 93, a fuel cell DC/DC converter pre-charge relay 94, and a fuel cell DC/DC converter pre-charge resistor 95; the fuel cell DC/DC converter pre-charging relay 94, the fuel cell DC/DC converter pre-charging resistor 95 and the fuel cell stack main positive relay 91 are electrically connected in series with a first output end of the fuel cell stack system 100 and a first input end of the fuel cell DC/DC converter system 80 in sequence; the fuel cell DC/DC converter pre-charge relay 94, the fuel cell DC/DC converter pre-charge resistor 95 and the fuel cell stack main positive relay 91 form a pre-charge circuit of the fuel cell DC/DC converter system 80; the fuel cell DC/DC converter main-positive relay 93 is connected in parallel between the fuel cell DC/DC converter pre-charge relay 94 and the fuel cell DC/DC converter pre-charge resistor 95; the fuel cell stack main negative relay 92 is connected in series with a second output terminal of the fuel cell stack system 100 and a second input terminal of the fuel cell DC/DC converter system 80; the whole vehicle control device is used for controlling the closing of the fuel cell DC/DC converter pre-charging relay 94, the fuel cell pile main positive relay 91 and the fuel cell pile main negative relay 92 so as to pre-charge the fuel cell DC/DC converter system 80; and the controller is also used for controlling the fuel cell DC/DC converter pre-charging relay 94 to be switched off, and controlling the fuel cell DC/DC converter main positive relay 93, the fuel cell stack main positive relay 91 and the fuel cell stack main negative relay 92 to be switched on so as to supply power to the fuel cell DC/DC converter system 80 normally.
The fuel cell stack system 100 controls the second high-voltage power distribution device 90 to be closed through a vehicle control device so as to power the power motor system 30; in the process that the fuel cell stack 100 supplies power to the power motor system 30, a fuel cell main positive relay 91, a fuel cell main negative relay 92 and a fuel cell DC/DC converter pre-charging relay 94 are closed; a fuel cell DC/DC converter precharge circuit constituted by a fuel cell DC/DC converter precharge relay 94 and a fuel cell DC/DC converter precharge resistor 95 is turned on; because the high voltage borne by the pre-charging resistor 95 of the fuel cell DC/DC converter is limited, after the pre-charging of the fuel cell stack 100 is carried out for a period of time, the pre-charging relay 94 of the fuel cell DC/DC converter is opened, and the main positive relay 91 of the fuel cell, the main negative relay 92 of the fuel cell and the main positive relay 93 of the fuel cell DC/DC converter are closed, so that the power motor system 30 can be safely and normally powered.
Alternatively, as shown in fig. 2, the power battery system 10 includes a power battery pack and a power battery pack controller; the power battery pack controller is electrically connected with the power battery pack and is in communication connection with the whole vehicle control device; the power battery pack is used for providing electric energy for the power motor system and storing the electric energy;
and the power battery pack controller is used for monitoring and reporting the voltage state information of the power battery pack to the vehicle control device.
Alternatively, as shown in FIG. 2, the power motor system 30 includes a power motor and a power motor controller; the input end of the power motor controller is electrically connected with the power battery system, and the output end of the power motor controller is electrically connected with the power motor; the power motor controller is in communication connection with the whole vehicle control device; the power motor controller is used for converting the direct current output by the power battery system into alternating current to be supplied to the power motor; the system is also used for monitoring and uploading the state information of the power motor to the vehicle control device; and the power motor is used for providing power output for the whole vehicle.
Alternatively, as shown in fig. 2, the fuel cell DC/DC converter system 80 includes a DC-to-DC converter circuit and a fuel cell DC/DC converter controller; the input end of the direct current-to-direct current conversion circuit is electrically connected with the fuel cell stack system, and the output end of the direct current-to-direct current conversion circuit is electrically connected with the fuel cell DC/DC converter controller; the fuel cell DC/DC converter controller is in communication connection with the whole vehicle control device; the direct current-to-direct current conversion circuit is used for carrying out voltage reduction processing on the voltage output by the fuel cell stack system 100 and then transmitting the voltage to the power motor system 30 and the power battery system 10 in a one-way mode; and the fuel cell DC/DC converter controller is used for monitoring and reporting voltage information output by the DC-to-DC conversion circuit to the vehicle control device.
Alternatively, as shown in fig. 2, the air compressor system 60 includes an air compressor and an air compressor controller; the air compressor controller is respectively and electrically connected with the power battery system and the air compressor, and the air compressor controller is in communication connection with the whole vehicle control device; the air compressor controller is used for converting direct current output by the power battery system 30 into alternating current for the air compressor to work; the air compressor monitoring and uploading device is also used for monitoring and uploading state information of the air compressor to the whole vehicle control device; and the air compressor is used for providing reaction gas for the fuel cell stack system.
Optionally, as shown in fig. 2, the air compressor DC/DC converter system 70 includes a bidirectional voltage reduction circuit and an air compressor DC/DC controller; the bidirectional voltage reduction circuit is respectively and electrically connected with the power battery system and the air compressor DC/DC controller, and the air compressor DC/DC controller is in communication connection with the whole vehicle control device; the bidirectional voltage reduction circuit is used for reducing the voltage output by the power battery system so as to supply the air compressor to work; and the air compressor DC/DC controller is used for monitoring and uploading voltage information output by the bidirectional voltage reduction circuit to the whole vehicle control device.
Optionally, the water pump system 50 includes a water pump, a water pump fuse, and a water pump controller; the water pump controllers are electrically connected with the water pump and the water pump fuse, and the water pump controllers are in communication connection with the whole vehicle control device; the water pump is used for providing water circulation for the fuel cell stack system; the water pump controller is used for monitoring and uploading state information of the water pump to the vehicle control device; the water pump fuse is also used for disconnecting the water pump fuse according to the state information of the water pump so as to protect the water pump; the PTC system 40 includes a PTC, a PTC fuse, and a PTC controller; the PTC controllers are electrically connected with the PTC and the PTC fuse; the PTC controller is in communication connection with the whole vehicle control device; a PTC for heating the fuel cell stack system; the PTC controller is used for monitoring and reporting the state information of the PTC to the vehicle control device; and also for disconnecting the PTC fuse according to the state information of the PTC to protect the PTC.
Optionally, whole car controlling means for through control first high voltage distribution device and second high voltage distribution device with control whole car power distribution on off and control whole car energy distribution, specifically do: and the whole vehicle control device is used for controlling the on-off of the first high-voltage power distribution device 20 and the second high-voltage power distribution device 80 according to the voltage state information of the power battery pack, the state information of the power motor, the voltage information output by the direct current-to-direct current conversion circuit, the state information of the air compressor, the voltage information output by the bidirectional voltage reduction circuit, the state information of the water pump and the state information of the PTC to control the on-off of the whole vehicle and control the energy distribution of the whole vehicle.
Furthermore, the whole vehicle control device detects and comprehensively judges the state information of each high-voltage component in each high-voltage component of the fuel cell vehicle in real time, and controls the on-off of the first high-voltage distribution device 20 and the second high-voltage distribution device 90 to realize the on-off of the whole vehicle, so that the whole on-off process is reasonable, safe and reliable. When the corresponding function of a certain high-voltage component in the fuel cell vehicle is met, high-voltage electrification is carried out, so that the high-voltage component is prevented from being electrified under the abnormal working condition, and the use reliability of the topological structure of the fuel cell vehicle is improved. Illustratively, when the voltage state information of the power battery pack, the state information of the power motor, the voltage information output by the direct current-to-direct current conversion circuit, the state information of the air compressor, the voltage information output by the bidirectional voltage reduction circuit, the state information of the water pump and the state information of the PTC meet preset requirements, controlling the whole fuel cell vehicle to be powered on; namely, the first high-voltage power distribution device 20 is controlled to be closed, and the power motor system 30, the PTC system 40, the water pump system 50, the air compressor DCDC converter system 70 and the air compressor system 60 are charged; then the whole vehicle control device sends a charging request to the air compressor DC/DC controller, and simultaneously sends a request of the voltage of the DC/DC output end of the air compressor, when the voltage of the output end of the DC/DC converter of the air compressor gradually rises, then the whole vehicle control device 110 judges that the voltage of the output end fed back by the DC/DC converter of the air compressor meets the requirement of the air compressor, and at the moment, the high voltage of the air compressor system is electrified and started; then the second high-voltage power distribution device 90 is controlled to be closed, the fuel cell DC/DC converter system 80 is charged, then the whole vehicle control device sends a starting and output voltage request to the fuel cell DC/DC converter system 80, when the whole vehicle control device judges that the fuel cell DC/DC converter meets the requirement according to the output end voltage of the fuel cell DC/DC converter system 80, the fuel cell DC/DC converter system 80 is powered on and started; completing the whole fuel cell vehicle electrification; therefore, each high-voltage component is electrified according to the priority, so that the whole vehicle is electrified safely and reliably.
It should be noted here that, based on the same topology structure, the entire power-off process of the fuel cell vehicle may sequentially control the second high-voltage power distribution device 90 to be disconnected, then the first high-voltage power distribution device 20 is disconnected, then the entire vehicle control device sends a discharge command to the fuel cell DC/DC converter system 80, the air compressor system 60, and the air compressor DC/DC converter system 70, then the fuel cell DC/DC converter system 80 discharges the capacitor electricity at the input end, the air compressor system 60 actively discharges, and the capacitors on both sides of the air compressor DC/DC converter system 70 discharge with the active discharge of the air compressor; thus, the whole fuel cell is powered off; when the whole vehicle control device detects that the whole vehicle has a fault, the whole vehicle control device controls the bidirectional voltage reduction circuit in the air compressor DC/DC converter system 70 to be disconnected, so that the energy flow of the fuel cell stack system and the power battery system is cut off, and the fuel cell stack system and the power battery system are prevented from continuously outputting energy to cause energy waste. According to the technical scheme, the whole vehicle control device controls the high-voltage components to be powered up and down in sequence according to the priority according to the state information of the high-voltage components, so that the whole power-up and power-down process is reasonable, safe and reliable. In addition, the fuel cell vehicle can be suitable for fuel cell commercial vehicles such as light, medium, heavy and passenger cars, and also suitable for other vehicles provided with fuel cells.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. A high-voltage topological structure for a fuel cell vehicle is characterized by comprising a power battery system, a first high-voltage power distribution device, a power motor system, a PTC system, a water pump system, an air compressor DC/DC converter system, a fuel cell DC/DC converter system, a second high-voltage power distribution device, a fuel cell stack system and a vehicle control device;
the power battery system is electrically connected with the power motor system in parallel through the first high-voltage power distribution device;
the power battery system is used for providing a first type of energy for the power motor system;
the power motor system is used for realizing the driving running of the whole vehicle;
the fuel cell stack system is used for providing a second type of energy for the power motor system;
the fuel cell stack system is electrically connected in parallel with the fuel cell DC/DC converter system through the second high-voltage power distribution device;
the fuel cell DC/DC converter system is used for carrying out voltage reduction treatment on the voltage output by the fuel cell stack system and then unidirectionally conveying the voltage to the power motor system and the power battery system;
the PTC system, the water pump system, the air compressor system and the air compressor DC/DC converter system are electrically connected with the power motor system and the fuel cell DC/DC converter system in parallel;
the PTC system is used for heating the fuel cell stack system;
the water pump system is used for providing water circulation for the fuel cell stack system;
the air compressor system is used for providing reaction gas for the fuel cell stack system;
the air compressor DC/DC converter system is used for converting the voltage output by the power battery system into the voltage required by the work of the air compressor system;
the whole vehicle control device is in communication connection with the power battery system, the power motor system, the PTC system, the water pump system, the air compressor DC/DC converter system and the fuel cell DC/DC converter system, the whole vehicle control device is electrically connected with the first high-voltage power distribution device and the first high-voltage power distribution device,
and the whole vehicle control device is used for controlling the on-off of the first high-voltage power distribution device and the second high-voltage power distribution device according to the state information of the power battery system, the power motor system, the PTC system, the water pump system, the air compressor DC/DC converter system and the fuel battery DC/DC converter system so as to control the on-off of the whole vehicle and control the energy distribution of the whole vehicle.
2. The high-voltage topology structure for the fuel cell vehicle according to claim 1, wherein the first high-voltage power distribution device comprises a power battery main positive relay, a power battery main negative relay, a power motor relay and a power motor pre-charging resistor;
the power motor relay and the power motor pre-charging resistor are electrically connected between a first output end of the power battery system and a first input end of the power motor system in series, and the power motor relay and the power motor pre-charging resistor form a power motor system pre-charging loop;
the power battery main positive relay is electrically connected between the first output end of the power battery system and the first input end of the power motor system in series;
the power battery main and negative relays are electrically connected in series with a second output end of the power battery system and a second input end of the power motor system;
the whole vehicle control device is used for controlling the power motor relay and the power battery main and negative relays to be closed so as to supply the power motor system with pre-charging;
and the power battery main and positive relay is also used for controlling the power motor relay to be disconnected and controlling the power battery main and positive relay to be closed so as to supply power to the power motor system normally.
3. The high-voltage topology structure for fuel cell vehicles according to claim 1, wherein the second high-voltage power distribution device comprises a fuel cell stack main positive relay, a fuel cell stack main negative relay, a fuel cell DC/DC converter main positive relay, a fuel cell DC/DC converter pre-charge relay, and a fuel cell DC/DC converter pre-charge resistor;
the fuel cell DC/DC converter pre-charging relay, the fuel cell DC/DC converter pre-charging resistor and the fuel cell stack main positive relay are sequentially and electrically connected in series with a first output end of the fuel cell stack system and a first input end of the fuel cell DC/DC converter system; the fuel cell DC/DC converter pre-charging relay, the fuel cell DC/DC converter pre-charging resistor and the fuel cell stack main positive relay form a fuel cell DC/DC converter system pre-charging loop;
the fuel cell DC/DC converter main positive relay is connected in parallel between the fuel cell DC/DC converter pre-charging relay and the fuel cell DC/DC converter pre-charging resistor;
the fuel cell stack main and negative relays are connected in series with a second output end of the fuel cell stack system and a second input end of the fuel cell DC/DC converter system;
the whole vehicle control device is used for controlling the closing of the fuel cell DC/DC converter pre-charging relay, the fuel cell pile main positive relay and the fuel cell pile main negative relay so as to pre-charge the fuel cell DC/DC converter system;
the control circuit is also used for controlling a pre-charging relay of the fuel cell DC/DC converter to be switched off and controlling a main positive relay of the fuel cell DC/DC converter, a main positive relay of the fuel cell stack and a main negative relay of the fuel cell stack to be switched on so as to supply power to the fuel cell DC/DC converter system normally.
4. The fuel cell vehicle high voltage topology of claim 1, wherein the power cell system comprises a power cell stack and a power cell stack controller; the power battery pack controller is electrically connected with the power battery pack and is in communication connection with the finished automobile control device;
the power battery pack is used for providing electric energy for the power motor system and storing the electric energy;
and the power battery pack controller is used for monitoring and reporting the voltage state information of the power battery pack to the vehicle control device.
5. The fuel cell vehicle high voltage topology of claim 4, wherein the power motor system comprises a power motor and a power motor controller;
the input end of the power motor controller is electrically connected with the power battery system, and the output end of the power motor controller is electrically connected with the power motor; the power motor controller is in communication connection with the whole vehicle control device;
the power motor controller is used for converting the direct current output by the power battery system into alternating current to be supplied to the power motor; the vehicle control device is also used for monitoring and uploading the state information of the power motor to the vehicle control device;
and the power motor is used for providing power output for the whole vehicle.
6. The fuel cell vehicle high voltage topology of claim 5, wherein the fuel cell DC/DC converter system comprises a DC-to-DC conversion circuit and a fuel cell DC/DC converter controller;
the input end of the direct current-to-direct current conversion circuit is electrically connected with the fuel cell stack system, and the output end of the direct current-to-direct current conversion circuit is electrically connected with the fuel cell DC/DC converter controller; the fuel cell DC/DC converter controller is in communication connection with the whole vehicle control device;
the direct current-to-direct current conversion circuit is used for carrying out voltage reduction processing on the voltage output by the fuel cell stack system and then unidirectionally transmitting the voltage to the power motor system and the power battery system;
and the fuel cell DC/DC converter controller is used for monitoring and reporting voltage information output by the DC-to-DC conversion circuit to the vehicle control device.
7. The fuel cell vehicle high-voltage topology of claim 6, wherein the air compressor system comprises an air compressor and an air compressor controller;
the air compressor controller is respectively electrically connected with the power battery system and the air compressor, and the air compressor controller is in communication connection with the whole vehicle control device;
the air compressor controller is used for converting direct current output by the power battery system into alternating current to supply the air compressor to work; the air compressor is also used for monitoring and uploading state information of the air compressor to the vehicle control device;
and the air compressor is used for providing reaction gas for the fuel cell stack system.
8. The fuel cell vehicle high-voltage topology of claim 7, wherein the air compressor DC/DC converter system comprises a bi-directional buck circuit and an air compressor DC/DC controller;
the air compressor DC/DC controller is respectively and electrically connected with the power battery system and the bidirectional voltage reduction circuit, and is in communication connection with the whole vehicle control device;
the bidirectional voltage reduction circuit is used for reducing the voltage output by the power battery system so as to enable the air compressor to work;
and the air compressor DC/DC controller is used for monitoring and uploading voltage information output by the bidirectional voltage reduction circuit to the whole vehicle control device.
9. The high-voltage topology structure for fuel cell vehicles of claim 8, wherein the water pump system comprises a water pump, a water pump fuse and a water pump controller; the water pump controllers are electrically connected with the water pump and the water pump fuse, and the water pump controllers are in communication connection with the whole vehicle control device;
the water pump is used for providing water circulation for the fuel cell stack system;
the water pump controller is used for monitoring and uploading state information of the water pump to the vehicle control device; the water pump fuse is also used for disconnecting the water pump fuse according to the state information of the water pump so as to protect the water pump;
the PTC system comprises a PTC, a PTC fuse and a PTC controller; the PTC controllers are electrically connected with the PTC and the PTC fuse; the PTC controller is in communication connection with the whole vehicle control device;
the PTC is used for heating the fuel cell stack system;
the PTC controller is used for monitoring and reporting the state information of the PTC to the vehicle control device; and also for disconnecting the PTC fuse to protect the PTC according to the state information of the PTC.
10. The high-voltage topology structure for the fuel cell vehicle as claimed in claim 9, wherein the vehicle control device is configured to control the on/off of the first high-voltage power distribution device and the second high-voltage power distribution device according to the state information of the power battery system, the power motor system, the PTC system, the water pump system, the air compressor DC/DC converter system, and the fuel cell DC/DC converter system, so as to control the power on/off of the vehicle and control the energy distribution of the vehicle, and specifically includes:
and the whole vehicle control device is used for controlling the on-off of the first high-voltage distribution device and the second high-voltage distribution device so as to control the on-off of the whole vehicle and the energy distribution of the whole vehicle according to the voltage state information of the power battery pack, the state information of the power motor, the voltage information output by the direct current-to-direct current conversion circuit, the state information of the air compressor, the voltage information output by the bidirectional voltage reduction circuit, the state information of the water pump and the state information of the PTC.
CN202120272553.8U 2021-01-29 2021-01-29 High-voltage topological structure for fuel cell vehicle Active CN214396436U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116683773A (en) * 2023-06-01 2023-09-01 同济大学 Isolated DCDC converter topology structure for fuel cell system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116683773A (en) * 2023-06-01 2023-09-01 同济大学 Isolated DCDC converter topology structure for fuel cell system
CN116683773B (en) * 2023-06-01 2024-02-20 同济大学 Isolated DCDC converter topology structure for fuel cell system

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