CN112701329B - Control method for on-load starting of fuel cell system - Google Patents
Control method for on-load starting of fuel cell system Download PDFInfo
- Publication number
- CN112701329B CN112701329B CN202011438730.1A CN202011438730A CN112701329B CN 112701329 B CN112701329 B CN 112701329B CN 202011438730 A CN202011438730 A CN 202011438730A CN 112701329 B CN112701329 B CN 112701329B
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- fuel cell
- cell system
- voltage
- voh
- starting
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- 239000000446 fuel Substances 0.000 title claims abstract description 102
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000010926 purge Methods 0.000 claims abstract description 9
- 239000001257 hydrogen Substances 0.000 claims description 16
- 229910052739 hydrogen Inorganic materials 0.000 claims description 16
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 15
- 239000000110 cooling liquid Substances 0.000 claims description 8
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000002826 coolant Substances 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 230000000670 limiting effect Effects 0.000 claims description 2
- 239000003054 catalyst Substances 0.000 abstract description 4
- 230000002829 reductive effect Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Landscapes
- Fuel Cell (AREA)
Abstract
The invention discloses a control method for load starting of a fuel cell system, which comprises the following steps: in the starting-up and shutdown purging processes of the fuel cell system, the voltage of the output end of the fuel cell is controlled by the electronic load controller, so that the fuel cell system works in a safe voltage range; the voltage at the output of the fuel cell cannot be higher than the upper limit voltage value voh_h, the secondary upper limit voltage limit value is set to voh_l, and voh_h > voh_1. According to the invention, in the starting-up and shutdown purging processes of the fuel cell system, the electronic load controller is adopted to control the discharge to control the open-circuit voltage of the fuel cell system within a proper voltage range, so that the influence on the catalyst of the fuel cell system is reduced, and the service life of the fuel cell is prolonged.
Description
Technical Field
The present invention relates to the technical field of fuel cell systems. More particularly, the present invention relates to a control method for on-load start of a fuel cell system.
Background
In recent years, along with the increasing serious environmental pollution problem, the environmental pollution prevention, the environmental protection and the ecological balance maintenance become an important measure of social development, the power demand of the current automobile industry cannot be met by the traditional petroleum energy source, the fuel cell with excellent performance is widely regarded as the best choice of the energy scheme of the electric automobile in the future, the fuel cell is a high-efficiency power generation device which directly converts chemical energy in fuel (such as hydrogen, natural gas and the like) and oxidant into electric energy in an electrochemical reaction mode without a combustion process, can continuously generate power, and the generated product is mainly water and basically does not discharge harmful gas, so the fuel cell automobile is cleaner and environment-friendly, and achieves zero emission and zero pollution in the true sense.
The fuel cell system is often switched between the starting, running and shutdown operation, when the switching operation is carried out between the starting and shutdown operation states, a purging process is often needed, the open-circuit voltage output by the fuel cell system is very high during the switching operation, the high voltage easily reduces the performance of the fuel cell catalyst, and if the open-circuit voltage is too high for a long time, and effective measures are not taken for inhibiting, the performance of the fuel cell system can be slowly reduced, the normal running time of the fuel cell system is further shortened, the service life of the fuel cell system is influenced, and the power performance of the whole vehicle is further influenced.
Disclosure of Invention
It is an object of the present invention to solve at least the above problems and to provide at least the advantages to be described later.
The invention also aims to provide a control method for the load starting of the fuel cell system, which can control the open-circuit voltage of the fuel cell system within a proper voltage range by adopting the electronic load controller to control discharge in the starting and shutting down purging processes of the fuel cell system, thereby reducing the influence on the catalyst of the fuel cell system and prolonging the service life of the fuel cell.
To achieve these objects and other advantages and in accordance with the purpose of the invention, a control method of load start-up of a fuel cell system is provided, comprising the steps of: in the starting-up and shutdown purging processes of the fuel cell system, the voltage of the output end of the fuel cell is controlled by the electronic load controller, so that the fuel cell system works in a safe voltage range.
Preferably, the voltage at the output of the fuel cell cannot be higher than the upper limit voltage value voh_h, the two-stage upper limit voltage limit value is set to voh_l, and voh_h > voh_1.
Preferably, the load for electronic load control is one of a resistive load or a coolant heating device of the fuel cell system.
Preferably, the load of the electronic load controller is not limited to one of a resistive load or a coolant heating device of the fuel cell system.
Preferably, the specific process of controlling the voltage of the output end of the fuel cell by the electronic load controller is as follows:
the fuel cell system receives the starting command to start working;
the electronic load controller monitors a voltage value V0 of the output end of the fuel cell and receives a minimum voltage value Vcell_l of the fuel cell unit through a CAN bus;
when the voltage value V0 of the output end of the fuel cell rises to be not lower than the second-level upper voltage limit value VOH_l, starting the electronic load controller to work when the minimum voltage value of the fuel cell is not lower than Vcell_l;
the load of the electronic load controller is increased or decreased proportionally, and the voltage value V0 of the output end of the fuel cell is controlled to be always lower than VOH_h until the fuel cell system is started successfully;
switching to the power system load, and closing the electronic load controller.
Preferably, before the electronic load controller monitors the voltage at the output terminal of the fuel cell after the fuel cell system receives the start command to start operation, the method further comprises: and setting the flow of the cooling liquid, after the cooling liquid path works normally, starting a hydrogen circulating pump, a hydrogen inlet valve and a hydrogen outlet valve, and after hydrogen enters a fuel cell flow channel and the hydrogen side works normally, starting an air compressor to work.
The invention at least comprises the following beneficial effects:
in the starting-up and shutdown purging processes of the fuel cell system, the electronic load controller is adopted to control the discharge to control the open-circuit voltage of the fuel cell system to be in a proper voltage range, so that the influence on the catalyst of the fuel cell system is reduced, and the service life of the fuel cell is prolonged.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic diagram of an electronic load control flow according to one embodiment of the invention.
Detailed Description
The present invention is described in further detail below with reference to examples to enable those skilled in the art to practice the same by referring to the description.
When the fuel cell system is switched between a start-up working state and a shutdown working state, a purging process is often needed, during which the open-circuit voltage output by the fuel cell system is very high, the voltage of the output end of the fuel cell is controlled by controlling an electronic load, the output voltage of the fuel cell cannot be higher than an upper limit voltage value VOH_h, a secondary upper limit voltage limiting value is set as VOH_l, and VOH_h > VOH_l.
The upper limit voltage value and the second upper limit voltage value of the output voltage of the fuel cell system may be calibrated according to the system parameters.
As shown in fig. 1, the present embodiment provides a control method for load starting of a fuel cell system, which includes the following steps: in the starting-up and shutdown purging processes of the fuel cell system, the voltage of the output end of the fuel cell is controlled by the electronic load controller, so that the fuel cell system works in a safe voltage range.
The specific process of the electronic load controller controlling the voltage of the output end of the fuel cell is as follows:
the fuel cell system receives the starting command to start working;
setting the flow of cooling liquid, after the cooling liquid path works normally, starting a hydrogen circulating pump, a hydrogen inlet valve and a hydrogen outlet valve, after hydrogen enters a fuel cell flow channel, outputting voltage at the output end of the fuel cell, and after the hydrogen side works normally, starting an air compressor to work, wherein the voltage at the output end of the fuel cell is higher and higher;
in the whole starting process of the fuel cell, the electronic load controller monitors a voltage value V0 of an output end of the fuel cell and receives a minimum voltage value Vcell_l of the fuel cell through a CAN bus;
in the process of slowly rising the output voltage, when the voltage value V0 at the output end of the fuel cell firstly rises to reach the second-level upper limit voltage limit value VOH_l, the electronic load controller is started to work;
when the voltage value V0 of the output end of the fuel cell rises to be not lower than the second-level upper voltage limit value VOH_l, starting the electronic load controller to work when the minimum voltage value of the fuel cell is not lower than Vcell_l;
the load of the electronic load controller is increased or decreased proportionally, and the voltage of the output end of the fuel cell is controlled to be always lower than VOH_h until the fuel cell system is started successfully;
when the minimum voltage of the fuel cell unit is lower than Vcell_l, directly starting the fuel cell system;
switching to the power system load, and closing the electronic load controller.
The load of the electronic load control adopts one of a resistive load and a coolant heating device of the fuel cell system.
The load of the electronic load controller is not limited to one of a resistive load and a coolant heating device of the fuel cell system.
If the load of the electronic load controller adopts the cooling liquid heating device of the fuel cell system, the generated energy is converted into heat energy to heat the cooling liquid, which is helpful for the temperature rising process after the start of the fuel cell system.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown, it is well suited to various fields of use for which the invention is suited, and further modifications may be readily made by one skilled in the art, and the invention is therefore not to be limited to the particular details and examples shown and described herein, without departing from the general concepts defined by the claims and the equivalents thereof.
Claims (4)
1. A method for controlling load start of a fuel cell system, comprising the steps of: in the starting-up and shutdown purging processes of the fuel cell system, the voltage of the output end of the fuel cell is controlled by the electronic load controller, so that the fuel cell system works in a safe voltage range;
the voltage of the output end of the fuel cell cannot be higher than the upper limit voltage value VOH_h, a secondary upper limit voltage limiting value is set as VOH_l, and VOH_h > VOH_1;
the specific process of the electronic load controller controlling the voltage of the output end of the fuel cell is as follows:
the fuel cell system receives the starting command to start working;
the electronic load controller monitors a voltage value V0 of the output end of the fuel cell and receives a minimum voltage value Vcell_l of the fuel cell unit through a CAN bus;
when the voltage value V0 of the output end of the fuel cell rises to be not lower than the second-level upper voltage limit value VOH_l, starting the electronic load controller to work when the minimum voltage value of the fuel cell is not lower than Vcell_l;
the load of the electronic load controller is increased or decreased proportionally, and the voltage value V0 of the output end of the fuel cell is controlled to be always lower than VOH_h until the fuel cell system is started successfully;
switching to a power system load, and closing an electronic load controller;
when the minimum voltage of the fuel cell unit is lower than Vcell_l, directly starting the fuel cell system; when the voltage value V0 at the output end of the fuel cell is smaller than the secondary upper voltage limit value VOH_l, the electronic load controller is turned off.
2. The method for controlling load start-up of a fuel cell system according to claim 1, wherein the load controlled by the electronic load is one of a resistive load and a coolant heating device of the fuel cell system.
3. The method for controlling load start-up of a fuel cell system according to claim 1, wherein the load of the electronic load controller is not limited to one of a resistive load and a coolant heating device of the fuel cell system.
4. The method for controlling load start-up of a fuel cell system according to claim 1, wherein before the electronic load controller monitors the voltage at the output terminal of the fuel cell after the start-up command is received by the fuel cell system, further comprising: and setting the flow of the cooling liquid, after the cooling liquid path works normally, starting a hydrogen circulating pump, a hydrogen inlet valve and a hydrogen outlet valve, and after hydrogen enters a fuel cell flow channel and the hydrogen side works normally, starting an air compressor to work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011438730.1A CN112701329B (en) | 2020-12-10 | 2020-12-10 | Control method for on-load starting of fuel cell system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011438730.1A CN112701329B (en) | 2020-12-10 | 2020-12-10 | Control method for on-load starting of fuel cell system |
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| Publication Number | Publication Date |
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| CN112701329A CN112701329A (en) | 2021-04-23 |
| CN112701329B true CN112701329B (en) | 2023-07-18 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1890833A (en) * | 2003-10-07 | 2007-01-03 | Utc燃料电池有限责任公司 | Fuel cell voltage control |
| CN103259031A (en) * | 2013-04-12 | 2013-08-21 | 武汉理工大学 | Starting and shutdown control method for proton exchange membrane fuel cell |
| CN106876747A (en) * | 2015-12-09 | 2017-06-20 | 现代自动车株式会社 | Method for controlling the startup of fuel-cell vehicle |
| CN111628197A (en) * | 2020-05-29 | 2020-09-04 | 湖北工业大学 | CAN bus-based fuel cell power system platform upper computer monitoring method |
| CN111900439A (en) * | 2020-06-23 | 2020-11-06 | 摩氢科技有限公司 | Fuel cell system and starting control method thereof |
-
2020
- 2020-12-10 CN CN202011438730.1A patent/CN112701329B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1890833A (en) * | 2003-10-07 | 2007-01-03 | Utc燃料电池有限责任公司 | Fuel cell voltage control |
| CN103259031A (en) * | 2013-04-12 | 2013-08-21 | 武汉理工大学 | Starting and shutdown control method for proton exchange membrane fuel cell |
| CN106876747A (en) * | 2015-12-09 | 2017-06-20 | 现代自动车株式会社 | Method for controlling the startup of fuel-cell vehicle |
| CN111628197A (en) * | 2020-05-29 | 2020-09-04 | 湖北工业大学 | CAN bus-based fuel cell power system platform upper computer monitoring method |
| CN111900439A (en) * | 2020-06-23 | 2020-11-06 | 摩氢科技有限公司 | Fuel cell system and starting control method thereof |
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| Publication number | Publication date |
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| CN112701329A (en) | 2021-04-23 |
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Address after: 430000 Building 1, No. 99, Weilai Third Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee after: Grove Hydrogen Energy Technology Group Co.,Ltd. Address before: 430000 Building 1, No. 99, Weilai Third Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee before: WUHAN LUOGEFU HYDROGEN ENERGY AUTOMOBILE Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Control Method for Load Starting of Fuel Cell Systems Granted publication date: 20230718 Pledgee: Jinan Luneng Kaiyuan Group Co.,Ltd. Pledgor: Grove Hydrogen Energy Technology Group Co.,Ltd. Registration number: Y2024980009137 |