CN212022340U - Self-powered system for shutdown purging process of fuel cell vehicle - Google Patents
Self-powered system for shutdown purging process of fuel cell vehicle Download PDFInfo
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- CN212022340U CN212022340U CN202020574189.6U CN202020574189U CN212022340U CN 212022340 U CN212022340 U CN 212022340U CN 202020574189 U CN202020574189 U CN 202020574189U CN 212022340 U CN212022340 U CN 212022340U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells
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Abstract
A self-powered system for a fuel cell vehicle shutdown purge process, comprising: the low-voltage power supply module comprises a storage battery and a main switch which are connected in series; the self-locking power supply module comprises a power battery, an auxiliary voltage reduction DC/DC, a first switch device, a second switch device, a vehicle controller and a fuel battery controller, wherein the input end of the auxiliary voltage reduction DC/DC is electrically connected to the power battery, and the output end of the auxiliary voltage reduction DC/DC is electrically connected to the vehicle controller through the first switch device and is electrically connected to the fuel battery controller through the second switch device; the fuel cell power generation module comprises a fuel cell engine and a boosting DC/DC, wherein the input end of the boosting DC/DC is electrically connected to the fuel cell engine, the output end of the boosting DC/DC is electrically connected to the power cell, the storage battery is electrically connected to the vehicle control unit through the main switch and the first switch device, and is electrically connected to the fuel cell controller through the main switch and the second switch device. The system realizes self power supply of the shutdown process when the fuel cell engine is shut down, and a driver does not need to wait for the shutdown to finish for a long time.
Description
Technical Field
The application belongs to the field of fuel cells, and particularly relates to a self-powered system for a shutdown purging process of a fuel cell vehicle.
Background
Along with the continuous exposure of the problems of the traditional automobile such as the increasingly prominent environmental pollution, the long charging time of the pure electric automobile, the limited endurance mileage and the like, the hydrogen fuel cell is widely applied to the field of automobiles due to the advantages of zero pollution, high efficiency, long endurance and the like.
The fuel cell vehicle is one of new energy vehicles, a fuel cell engine is used as a core component of a power system, the shutdown purging process of the fuel cell vehicle is important for the fuel cell vehicle to be applied to a pipe in northern areas, and under the condition that the ambient temperature is lower than zero centigrade, if the shutdown purging is abnormally terminated, the fuel cell engine can be damaged.
At present, when a fuel cell engine needs to be shut down, a driver operates a shutdown button, the fuel cell engine executes shutdown purging after receiving a shutdown signal, high-low voltage needs to be kept in the shutdown purging process, meanwhile, the driver has to park for waiting and observe an instrument, and after the instrument displays that shutdown is finished, the driver can leave the vehicle after closing a power supply main switch.
The prior technical scheme has the following defects: because the shutdown purging time of the fuel cell engine in winter is as long as 10 minutes, a driver needs to wait for a long time; and the possibility of misoperation of a driver exists, the power main switch needs to be manually closed by the driver, once the misoperation occurs, the driver closes the high-voltage and low-voltage power switch in advance, and the fuel cell engine cannot be purged, so that irreversible damage can be caused to the fuel cell engine.
SUMMERY OF THE UTILITY MODEL
The application of this application aims at: aiming at the existing problems, the self-powered system for the shutdown purging process of the fuel cell vehicle is provided, and the self-powered system can realize the self-power supply of the shutdown process system when the fuel cell vehicle fuel cell engine is shut down, so that a driver does not need to wait for the shutdown to be finished for a long time, and the damage of the fuel cell engine caused by the shutdown purging failure due to the misoperation of the driver is prevented.
In order to achieve the above object, according to one aspect of the present application, there is provided a self-powered system for a fuel cell vehicle shutdown purge process, including: the low-voltage power supply module comprises a storage battery and a main switch, and the storage battery and the main switch are connected in series; the self-locking power supply module comprises a power battery, an auxiliary buck direct-current converter, a first switch, a second switch, a vehicle controller and a fuel battery controller, wherein the input end of the auxiliary buck direct-current converter is electrically connected to the power battery, and the output end of the auxiliary buck direct-current converter is electrically connected to the vehicle controller through the first switch and is electrically connected to the fuel battery controller through the second switch; the fuel cell power generation module comprises a fuel cell engine and a boost direct current converter, wherein the input end of the boost direct current converter is electrically connected to the fuel cell engine, and the output end of the boost direct current converter is electrically connected to the power cell, the storage battery is electrically connected to the whole vehicle controller through the main switch and the first switch device, and is electrically connected to the fuel cell controller through the main switch and the second switch device.
Further, the vehicle control unit controls the on-off of the first switch, and the fuel cell controller controls the on-off of the second switch.
Further, the vehicle control unit and the fuel cell controller respectively control the first switch and the second switch to be closed after the main switch is closed.
Further, under the condition that the first switch device and the second switch device are closed, the power battery provides a high-voltage power supply for the system, and the auxiliary buck direct-current converter provides a low-voltage power supply for the system.
Further, the fuel cell controller sends a shutdown success signal to the vehicle control unit after the fuel cell engine is successfully shut down, and controls the second switch to be switched off, and the vehicle control unit controls the high-voltage contactor of the power cell to be switched off after receiving the shutdown success signal, and then controls the first switch to be switched off.
Further, the first switch and the second switch are relays.
Further, the low-voltage power supply module further comprises a third switch, the battery is connected to the vehicle controller and the fuel cell controller through the third switch, and the third switch is closed in a system starting stage, so that the battery provides low-voltage power for the vehicle controller and the fuel cell controller.
Further, the third switch is a relay.
The self-powered system for the shutdown purging process of the fuel cell vehicle realizes the self-power supply of the system of the fuel cell engine in the shutdown process by adjusting the connection mode and the control strategy of the components under the condition that the system components are not increased, and a driver does not need to wait for the shutdown to be finished for a long time and can leave after pulling out a key to close a power master switch after pressing a shutdown button; the fuel cell vehicle has the advantages of avoiding customer complaints, avoiding the condition that the fuel cell engine is damaged due to shutdown purging failure caused by misoperation, having low cost, strong universality, safety and reliability, and being widely applied to fuel cell vehicles.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
fig. 1 illustrates an example of a self-powered system for a fuel cell vehicle shutdown purge process of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
According to an exemplary embodiment of the present application, there is provided a self-powered system for a fuel cell vehicle shutdown purge process, comprising:
the low-voltage power supply module comprises a storage battery and a main switch, and the storage battery and the main switch are connected in series;
the self-locking power supply module comprises a power battery, an auxiliary buck direct current converter (auxiliary buck DC/DC), a first switch, a second switch, a vehicle control unit and a fuel battery controller, wherein the input end of the auxiliary buck direct current converter is electrically connected to the power battery, and the output end of the auxiliary buck direct current converter is electrically connected to the vehicle control unit through the first switch and is electrically connected to the fuel battery controller through the second switch;
a fuel cell power generation module including a fuel cell engine and a boost direct current converter (boost DC/DC) having an input electrically connected to the fuel cell engine and an output electrically connected to the power cell,
the storage battery is electrically connected to the vehicle control unit through the main switch and the first switch device, and is electrically connected to the fuel battery controller through the main switch and the second switch device.
The self-powered system for the shutdown purging process of the fuel cell vehicle can realize self-powering of the shutdown process system when the fuel cell engine of the fuel cell vehicle is shut down, so that a driver does not need to wait for shutdown completion for a long time, and damage to the fuel cell engine due to shutdown purging failure caused by misoperation of the driver is prevented.
In one embodiment, the vehicle control unit controls the on-off of the first switch, and the fuel cell controller controls the on-off of the second switch.
In one embodiment, the vehicle control unit and the fuel cell controller respectively control the first switch and the second switch to be closed after the main switch is closed.
In one embodiment, the power battery provides high-voltage power for the system and the auxiliary buck dc converter provides low-voltage power for the system when the first switch and the second switch are closed.
In one embodiment, the fuel cell controller sends a shutdown success signal to the vehicle controller after the fuel cell engine is successfully shut down, and controls the second switch to be switched off, and the vehicle controller controls the high-voltage contactor of the power cell to be switched off after receiving the shutdown success signal, and then controls the first switch to be switched off.
In one embodiment, the first and second switches are relays.
In one embodiment, the low-voltage power supply module further comprises a third switch, the battery is connected to the vehicle controller and the fuel cell controller through the third switch, and the third switch is closed in a system starting stage, so that the battery provides low-voltage power for the vehicle controller and the fuel cell controller.
In one embodiment, the third switch is a relay.
One specific example of a self-powered system for a fuel cell vehicle shutdown purge process of the present application is described in detail below with reference to fig. 1.
As shown in fig. 1, the self-powered system for shutdown purge process of a fuel cell vehicle includes a low voltage power supply module, a self-locking power supply module, and a fuel cell power generation module. The low-voltage power supply module comprises a 24V storage battery 1, a power supply main switch (main switch) 2, a key START gear 3 and a low-voltage power supply signal relay (third switch device) 4. The self-locking power supply module comprises a low-voltage power relay (second switch) 5, a low-voltage power relay 6 (first switch), a vehicle control unit VCU 9, a fuel cell control unit FCU, a power battery 7 and an auxiliary voltage reduction DC/DC 8. The fuel cell power generation module includes a fuel cell engine 10 and a boost DC/DC 11.
Wherein, the storage battery 1 and the power main switch 2 are connected in series. The input end of the auxiliary step-down DC/DC8 is electrically connected to the power battery 7, and the output end is electrically connected to the vehicle control unit VCU 9 via the low-voltage power relay 6 and to the fuel battery controller FCU via the low-voltage power relay 5. The boost DC/DC11 has an input electrically connected to the fuel cell engine FCU and an output electrically connected to the power cell 7. The battery 1 is electrically connected to the vehicle control unit VCU 9 via the power main switch 2 and the low-voltage power relay 6, and is electrically connected to the fuel cell controller FCU via the power main switch 2 and the low-voltage power relay 5. On the other hand, the battery 1 is also connected to the vehicle control unit VCU 9 and the fuel cell control unit FCU together with the key START gear 3 and the low voltage power supply signal relay 4.
When a driver needs to drive the vehicle, the driver manually closes the power main switch 2 outside the vehicle and inserts the vehicle key into the key gear. At the beginning stage of the system, the storage battery 1 provides low-voltage power supply, when a driver screws a key to START, the low-voltage power supply signal relay 4 is closed, contacts of the low-voltage power supply signal relay supply low-voltage power to the VCU 9 of the whole vehicle controller and the FCU of the fuel cell controller, the two controllers respectively control the low-voltage power relays 5 and 6 to be closed after self-checking, the key START gear returns, the low-voltage power supply signal relay 4 is disconnected, the low-voltage power supply of the system is provided through the low-voltage power relays 5 and 6, and the low-voltage power supply process of the system. The power battery 7 provides pre-charging for the auxiliary voltage reduction DC/DC8 and the boosting DC/DC11 through the pre-charging process, high voltage is provided for a bus of the whole vehicle after the pre-charging is finished, and the high voltage electrification of the system is finished.
When a driver presses a start button, the fuel cell engine 10 and the boost DC/DC11 start to work, and corresponding power response is carried out according to the power requirement of the VCU 9 of the vehicle controller. The whole vehicle can normally run, and the power system of the vehicle is composed of a fuel cell engine (fuel cell power generation module) 10 and a power battery 7.
When a driver needs to stop and shut down, a shutdown button is pressed, after the vehicle control unit VCU 9 receives a shutdown signal, the shutdown signal is sent to the fuel cell controller FCU through the CAN bus, and the fuel cell controller FCU executes a corresponding shutdown purging strategy. The driver pulls out the key of the vehicle and closes the main switch of the power supply, and the driver can leave the vehicle without observing the state of the fuel cell power generation module of the instrument. In the shutdown process, the self-locking of the low-voltage power relays 5 and 6 is controlled by a fuel cell controller FCU and a vehicle control unit VCU 9 respectively, the power battery 7 provides high-voltage input for the auxiliary voltage reduction DC/DC8, the auxiliary voltage reduction DC/DC8 provides constant-voltage output for a system, and the low-voltage power supply is provided for the system; the power cell 7 provides high voltage power to the system while also providing the main load, providing a clamp for the output voltage for the boosted DC/DC11 in the fuel cell power module. The system not only has the guarantee of a low-voltage high-voltage power supply, but also has the guarantee of load, and guarantees the execution of the purging process of the fuel cell engine. The process is automatically completed by a controller of the system without human intervention. And when the fuel cell engine finishes the purging process, the shutdown is successful. The fuel cell controller FCU sends the shutdown state to the VCU 9 of the vehicle controller, and simultaneously, the low-voltage power relay 5 is disconnected; after receiving the signal of successful shutdown, the VCU 9 of the vehicle controller disconnects the high-voltage contactor of the power battery 7, namely, the power supply is completed under high voltage; and finally, the low-voltage power relay 6 is disconnected to finish low-voltage reduction. At this time, the high-low voltage of the entire vehicle system is completely disconnected, and the battery 1 and the power battery 7 are connected without load, so that no power consumption occurs. The parking shutdown process is ended.
According to the self-powered system of the fuel cell vehicle in the shutdown purging process, under the condition that system components are not added, the self-powered system of the fuel cell vehicle in the shutdown purging process is self-powered by adjusting the connection mode and the control strategy of the components, a driver does not need to wait for shutdown to be finished for a long time, and can leave after a shutdown button is pressed and a key is pulled out to close a power main switch; the fuel cell vehicle has the advantages of avoiding customer complaints, avoiding the condition that the fuel cell engine is damaged due to shutdown purging failure caused by misoperation, having low cost, strong universality, safety and reliability, and being widely applied to fuel cell vehicles.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A self-powered system for a fuel cell vehicle shutdown purge process, the self-powered system comprising:
the low-voltage power supply module comprises a storage battery and a main switch, and the storage battery and the main switch are connected in series;
the self-locking power supply module comprises a power battery, an auxiliary buck direct-current converter, a first switch, a second switch, a vehicle controller and a fuel battery controller, wherein the input end of the auxiliary buck direct-current converter is electrically connected to the power battery, and the output end of the auxiliary buck direct-current converter is electrically connected to the vehicle controller through the first switch and is electrically connected to the fuel battery controller through the second switch;
a fuel cell power generation module including a fuel cell engine and a boost DC converter having an input electrically connected to the fuel cell engine and an output electrically connected to the power cell,
the storage battery is electrically connected to the vehicle control unit through the main switch and the first switch device, and is electrically connected to the fuel battery controller through the main switch and the second switch device.
2. The self-powered system for shutdown purge process of fuel cell vehicle of claim 1, wherein the vehicle control unit controls on/off of the first switch, and the fuel cell controller controls on/off of the second switch.
3. The self-powered system for a fuel cell vehicle shutdown purge process of claim 2, wherein the vehicle controller and the fuel cell controller control the first and second switches to close, respectively, after the main switch is closed.
4. The self-powered system for a fuel cell vehicle shutdown purge process of claim 3, wherein the power cell provides high voltage power to the system and the auxiliary buck dc converter provides low voltage power to the system with the first and second switches closed.
5. The self-powered system for shutdown purge process of fuel cell vehicle as claimed in claim 1, wherein the fuel cell controller sends a shutdown success signal to the vehicle controller after the fuel cell engine is successfully shutdown, and controls the second switch to be turned off, and the vehicle controller controls the high voltage contactor of the power cell to be turned off after receiving the shutdown success signal, and then controls the first switch to be turned off.
6. The self-powered system for a fuel cell vehicle shutdown purge process of claim 1, wherein the first and second switches are relays.
7. The self-powered system for a fuel cell vehicle shutdown purge process of claim 1, wherein the low voltage power module further includes a third switch, the battery is connected to the vehicle controller and the fuel cell controller via the third switch, the third switch is closed during a system startup phase, such that the battery provides low voltage power for the vehicle controller and the fuel cell controller.
8. The self-powered system for a fuel cell vehicle shutdown purge process of claim 7, wherein the third switch is a relay.
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| CN202020574189.6U CN212022340U (en) | 2020-04-17 | 2020-04-17 | Self-powered system for shutdown purging process of fuel cell vehicle |
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| CN202020574189.6U CN212022340U (en) | 2020-04-17 | 2020-04-17 | Self-powered system for shutdown purging process of fuel cell vehicle |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112550084A (en) * | 2020-12-30 | 2021-03-26 | 大运汽车股份有限公司 | Power-on and power-off control method suitable for new energy commercial vehicle hydrogen stack |
| CN112590570A (en) * | 2020-12-30 | 2021-04-02 | 深圳市氢蓝时代动力科技有限公司 | Fuel cell power supply system, method and storage medium |
| CN113561802A (en) * | 2021-09-22 | 2021-10-29 | 北京亿华通科技股份有限公司 | Operation auxiliary device of vehicle-mounted fuel cell and control method thereof |
| CN113829965A (en) * | 2021-10-31 | 2021-12-24 | 东风商用车有限公司 | Purging delay power-off control method for fuel cell system of heavy truck in hydrogen fuel |
| CN117774784A (en) * | 2024-02-27 | 2024-03-29 | 合肥工业大学 | Whole car power-on and power-off time sequence control method of hydrogen fuel cell automobile |
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2020
- 2020-04-17 CN CN202020574189.6U patent/CN212022340U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112550084A (en) * | 2020-12-30 | 2021-03-26 | 大运汽车股份有限公司 | Power-on and power-off control method suitable for new energy commercial vehicle hydrogen stack |
| CN112590570A (en) * | 2020-12-30 | 2021-04-02 | 深圳市氢蓝时代动力科技有限公司 | Fuel cell power supply system, method and storage medium |
| CN112590570B (en) * | 2020-12-30 | 2024-02-02 | 深圳市氢蓝时代动力科技有限公司 | Fuel cell power supply system, method and storage medium |
| CN113561802A (en) * | 2021-09-22 | 2021-10-29 | 北京亿华通科技股份有限公司 | Operation auxiliary device of vehicle-mounted fuel cell and control method thereof |
| CN113829965A (en) * | 2021-10-31 | 2021-12-24 | 东风商用车有限公司 | Purging delay power-off control method for fuel cell system of heavy truck in hydrogen fuel |
| CN117774784A (en) * | 2024-02-27 | 2024-03-29 | 合肥工业大学 | Whole car power-on and power-off time sequence control method of hydrogen fuel cell automobile |
| CN117774784B (en) * | 2024-02-27 | 2024-05-14 | 合肥工业大学 | Whole car power-on and power-off time sequence control method of hydrogen fuel cell automobile |
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