CN113506898B - Safety protection maintenance device and method for hydrogen fuel cell engine - Google Patents
Safety protection maintenance device and method for hydrogen fuel cell engine Download PDFInfo
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- CN113506898B CN113506898B CN202111052844.7A CN202111052844A CN113506898B CN 113506898 B CN113506898 B CN 113506898B CN 202111052844 A CN202111052844 A CN 202111052844A CN 113506898 B CN113506898 B CN 113506898B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/04664—Failure or abnormal function
- H01M8/04679—Failure or abnormal function of fuel cell stacks
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/043—Processes for controlling fuel cells or fuel cell systems applied during specific periods
- H01M8/04303—Processes for controlling fuel cells or fuel cell systems applied during specific periods applied during shut-down
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/06—Combination of fuel cells with means for production of reactants or for treatment of residues
- H01M8/0662—Treatment of gaseous reactants or gaseous residues, e.g. cleaning
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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
- 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
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Abstract
The invention provides a safety protection maintenance device and a method for a hydrogen fuel cell engine, wherein the hydrogen fuel cell engine comprises an electric pile, a hydrogen system communicated with the electric pile and an air system communicated with the electric pile, and the safety protection maintenance device comprises: the bleeder circuit is connected between the two output ends of the galvanic pile and used for discharging residual electric quantity generated by the galvanic pile; the control system is connected with the hydrogen system, the air system and the discharge circuit and is used for judging whether the gas pipeline can introduce the purging gas with the set pressure into the galvanic pile or not, if so, the valve of the gas pipeline is controlled to be conducted so as to introduce the purging gas with the set pressure into the galvanic pile; if not, the valve of the air system is controlled to be conducted, and meanwhile the bleeder circuit is controlled to be started to work. The technical scheme provided by the invention can actively remove residual hydrogen in the galvanic pile and ensure the safety of maintenance personnel and an engine.
Description
Technical Field
The invention relates to the technical field of hydrogen fuel cell engines, in particular to a safety protection maintenance device and a safety protection maintenance method for a hydrogen fuel cell engine.
Background
When a hydrogen fuel cell engine is subjected to troubleshooting, a box needs to be opened to disassemble and assemble a pipeline and a wire harness or purge the pipeline, and in order to avoid the situation that the output voltage after the residual hydrogen in the galvanic pile reacts with air in the pipeline disassembling and assembling process damages the galvanic pile and threatens the personal safety of maintenance personnel, the residual hydrogen in the galvanic pile needs to be actively removed in advance so as to ensure the safety of the maintenance personnel and the engine.
Disclosure of Invention
In view of this, the invention provides a safety protection maintenance device and method for a hydrogen fuel cell engine, which effectively solve the technical problems in the prior art, and can actively remove residual hydrogen in a galvanic pile and ensure the safety of maintenance personnel and the engine.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a safety protection maintenance device for a hydrogen fuel cell engine,
the hydrogen fuel cell engine includes the galvanic pile, with the hydrogen system of galvanic pile intercommunication and with the air system of galvanic pile intercommunication, the safety protection overhauls the device and includes:
the bleeder circuit is connected between two output ends of the galvanic pile and used for discharging residual electric quantity generated by the galvanic pile; the control system is connected with the hydrogen system, the air system and the bleeder circuit, and is used for judging whether a gas pipeline can introduce purge gas with set pressure into the galvanic pile, wherein the gas pipeline is the pipeline of the hydrogen system and/or the air system, and if so, a valve of the gas pipeline is controlled to be communicated so as to introduce purge gas with set pressure into the galvanic pile; if not, controlling the valve of the air system to be conducted, and simultaneously controlling the relief circuit to be started to work.
Optionally, the bleeding circuit includes: the control end of the control switch is connected with the control system;
the second end of the control switch is connected with the first end of the bleeder resistor, and the first end of the control switch and the second end of the bleeder resistor are respectively connected with the two output ends of the galvanic pile.
Optionally, when the control system controls the valve of the gas pipeline to be switched on, the control system controls the accumulated time for introducing the purge gas into the galvanic pile to reach a set value.
Optionally, the purge gas is nitrogen.
Optionally, the control system controls the valve of the air system to be conducted, and controls the air system to introduce air into the galvanic pile at a set flow rate and pressure when the bleed circuit is controlled to be started to work.
Optionally, the air system includes an air compressor connected to the control system, and the control system controls the air compressor to generate the air with the set flow rate and pressure.
Optionally, two output ends of the electric pile are connected with electronic loads connected with the control system and the air compressor, and the control system controls the electronic loads to supply power to the air compressor.
Optionally, the electronic load includes a DCDC circuit connected to two output terminals of the stack, and a power battery connected to an output terminal of the DCDC circuit;
the air compressor is connected with the DCDC circuit, and the control system is connected with the DCDC circuit.
Correspondingly, the invention also provides a safety protection maintenance method for the hydrogen fuel cell engine, which comprises the following steps:
the control system judges whether a gas pipeline can introduce purge gas with set pressure into the galvanic pile, wherein the gas pipeline is a pipeline of the hydrogen system and/or the air system, and if so, a valve of the gas pipeline is controlled to be communicated so as to introduce purge gas with set pressure into the galvanic pile;
if not, controlling the valve of the air system to be conducted, and simultaneously controlling the relief circuit to be started to work.
Optionally, the control system controls the valve of the air system to be conducted, and controls the air system to introduce air into the galvanic pile at a set flow rate and pressure when the bleed circuit is controlled to be started to work.
Compared with the prior art, the technical scheme provided by the invention at least has the following advantages:
the invention provides a safety protection maintenance device and a method for a hydrogen fuel cell engine,
the hydrogen fuel cell engine includes the galvanic pile, with the hydrogen system of galvanic pile intercommunication and with the air system of galvanic pile intercommunication, the safety protection overhauls the device and includes:
the bleeder circuit is connected between two output ends of the galvanic pile and used for discharging residual electric quantity generated by the galvanic pile; the control system is connected with the hydrogen system, the air system and the bleeder circuit, and is used for judging whether a gas pipeline can introduce purge gas with set pressure into the galvanic pile, wherein the gas pipeline is the pipeline of the hydrogen system and/or the air system, and if so, a valve of the gas pipeline is controlled to be communicated so as to introduce purge gas with set pressure into the galvanic pile; if not, controlling the valve of the air system to be conducted, and simultaneously controlling the relief circuit to be started to work. The technical scheme provided by the invention can actively remove residual hydrogen in the galvanic pile and ensure the safety of maintenance personnel and an engine.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a safety protection maintenance device for a hydrogen fuel cell engine according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another safety protection maintenance device for a hydrogen fuel cell engine according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another safety protection maintenance device for a hydrogen fuel cell engine according to an embodiment of the present invention;
FIG. 4 is a flow chart of a method for safety protection and maintenance of a hydrogen fuel cell engine according to an embodiment of the present invention;
fig. 5 is a flowchart of another safety protection maintenance method for a hydrogen fuel cell engine according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
As described in the background art, when troubleshooting is performed on a hydrogen fuel cell engine, a case needs to be opened to disassemble and assemble a pipeline, a wire harness needs to be opened, or a pipeline needs to be purged, so that in order to avoid the situation that the output voltage damages a galvanic pile after the residual hydrogen in the galvanic pile reacts with air and threatens the personal safety of maintenance personnel in the process of disassembling and assembling the pipeline, the residual hydrogen in the galvanic pile needs to be actively removed in advance, and the safety of the maintenance personnel and the engine is ensured.
Based on the above, the embodiment of the invention provides a safety protection maintenance device and method for a hydrogen fuel cell engine, which effectively solve the technical problems in the prior art, can actively remove residual hydrogen in a galvanic pile, and ensure the safety of maintenance personnel and the engine.
To achieve the above object, the technical solutions provided by the embodiments of the present invention are described in detail below, specifically with reference to fig. 1 to 5.
Referring to fig. 1, a schematic structural diagram of a safety protection maintenance device for a hydrogen fuel cell engine according to an embodiment of the present invention is shown, where the hydrogen fuel cell engine includes a stack 100, a hydrogen system 200 in communication with the stack 100, and an air system 300 in communication with the stack 100, and the safety protection maintenance device includes:
the bleeder circuit 500 is connected between two output ends of the electric pile 100, and the bleeder circuit 500 is used for discharging the residual electric quantity generated by the electric pile 100;
the control system 600 is connected to the hydrogen system 200, the air system 300 and the relief circuit 500, and the control system 600 is configured to determine whether the gas pipeline can introduce purge gas at a set pressure to the stack 100, where the gas pipeline is a pipeline of the hydrogen system 200 and/or the air system 300, and if so, control the valve of the gas pipeline to be turned on to introduce purge gas at a set pressure to the stack 100; if not, the valve of the air system 300 is controlled to be conducted, and the bleeding circuit 500 is controlled to be opened to work.
It should be noted that, the hydrogen fuel cell engine provided by the embodiment of the present invention further includes a cooling system, and the cooling system is configured to cool the stack when the valve of the air system is open. Namely, the gas pipeline can not provide purge gas with set pressure, the hydrogen source of the hydrogen system is turned off, residual hydrogen in the galvanic pile is consumed to generate residual electric quantity in a mode of introducing air into the galvanic pile, and meanwhile, the cooling system is started to cool the galvanic pile.
It can be understood that, according to the technical scheme provided by the embodiment of the invention, before the troubleshooting of the hydrogen fuel cell engine needs to be carried out and the overhaul is carried out, whether the residual hydrogen in the stack can be completely purged through the gas pipeline is judged through the control system, if the gas pipeline can be purged through the purge gas with set pressure (wherein the purge gas source in the gas pipeline can be provided in a mode of an external gas source), the sources of the hydrogen system and the air system are shut off, and the purge gas is preferably adopted to purge the residual hydrogen in the stack. If the gas pipeline can not provide the purging gas with the set pressure, the source of the hydrogen system is cut off, residual hydrogen in the galvanic pile is consumed to generate residual electric quantity in a mode of introducing air into the galvanic pile, and the residual electric quantity is discharged through the discharge circuit, so that the purpose of removing the residual hydrogen in the galvanic pile is fulfilled. Therefore, the technical scheme provided by the embodiment of the invention can actively remove residual hydrogen in the galvanic pile and ensure the safety of maintenance personnel and an engine.
As shown in fig. 2, a schematic structural diagram of another safety protection maintenance device for a hydrogen fuel cell engine provided in an embodiment of the present invention is a safety protection maintenance device for a hydrogen fuel cell engine, where the hydrogen fuel cell engine includes a stack 100, a hydrogen system 200 in communication with the stack 100, and an air system 300 in communication with the stack 100, and the safety protection maintenance device includes:
the bleeder circuit 500 is connected between two output ends of the electric pile 100, and the bleeder circuit 500 is used for discharging the residual electric quantity generated by the electric pile 100;
the control system 600 is connected to the hydrogen system 200, the air system 300 and the relief circuit 500, and the control system 600 is configured to determine whether the gas pipeline can introduce purge gas at a set pressure to the stack 100, where the gas pipeline is a pipeline of the hydrogen system 200 and/or the air system 300 (preferably, the gas pipeline includes a pipeline of the hydrogen system, that is, the gas pipeline is a pipeline of the hydrogen system and the air system, or the gas pipeline is only a pipeline of the hydrogen system); if not, the valve of the air system 300 is controlled to be conducted, and the bleeding circuit 500 is controlled to be opened to work.
The bleeding circuit 500 provided in the embodiment of the present invention includes: a control terminal is connected with a control switch 510 and a bleeder resistor 520 of the control system.
The second end of the control switch 510 is connected to the first end of the bleeder resistor 520, and the first end of the control switch 510 and the second end of the bleeder resistor 520 are respectively connected to two output ends of the stack.
It can be understood that the control system provided by the embodiment of the invention can achieve the purpose of controlling whether the bleeder circuit works or not by controlling the on and off of the control switch. When the control system judges that the gas pipeline can provide purge gas with set pressure, the control system controls the control switch of the relief circuit to be switched off; and when the control system judges that the gas pipeline cannot provide the purge gas with the set pressure, the control system controls the control switch of the discharge circuit to be closed, and discharges the residual electric quantity in the galvanic pile through the discharge resistor.
In an embodiment of the invention, when the control system provided by the invention controls the valve of the gas pipeline to be switched on, the accumulated time for introducing the purging gas into the galvanic pile through the gas pipeline is controlled to reach a set value, then the gas source of the purging gas in the gas pipeline is cut off, and the valves of the hydrogen system and the air system are controlled to be restored to the initial state, so that the residual hydrogen in the galvanic pile is judged to be completely removed when the time for introducing the purging gas reaches the set value, and the detection efficiency is improved.
Optionally, the purge gas provided by the embodiment of the present invention may be an inert gas; the purge gas provided by the embodiment of the present invention may be nitrogen.
In an embodiment of the present invention, the control system provided by the present invention controls the valve of the air system to be turned on (and controls the valve of the hydrogen system to be turned off), and controls the air system to introduce air into the stack at a set flow rate and pressure when the bleed circuit is turned on, so that the residual hydrogen in the stack is actively consumed by the air at the set flow rate and pressure.
Optionally, the air system provided in the embodiment of the present invention includes an air compressor connected to the control system, and the control system controls the air compressor to generate the air with the set flow rate and pressure. When the control system judges that the time length of introducing air with set flow and pressure into the galvanic pile is not less than the time length threshold value and the voltage output by the galvanic pile is less than the threshold voltage, the air compressor is controlled to be powered off, the bleeder circuit is controlled to be closed, the valve of the air system is controlled to be restored to the initial state, the residual hydrogen in the galvanic pile is judged to be cleared, and then, maintenance personnel can safely disassemble and maintain.
As shown in fig. 3, a schematic structural diagram of a safety protection maintenance device for a hydrogen fuel cell engine according to an embodiment of the present invention is provided, wherein the hydrogen fuel cell engine includes a stack 100, a hydrogen system 200 in communication with the stack 100, and an air system 300 in communication with the stack 100, and the safety protection maintenance device includes:
the bleeder circuit 500 is connected between two output ends of the electric pile 100, and the bleeder circuit 500 is used for discharging the residual electric quantity generated by the electric pile 100;
the control system 600 is connected to the hydrogen system 200, the air system 300 and the relief circuit 500, and the control system 600 is configured to determine whether the gas pipeline can introduce purge gas at a set pressure to the stack 100, where the gas pipeline is a pipeline of the hydrogen system 200 and/or the air system 300, and if so, control the valve of the gas pipeline to be turned on to introduce purge gas at a set pressure to the stack 100; if not, the valve of the air system 300 is controlled to be conducted, and the bleeding circuit 500 is controlled to be opened to work.
The bleeding circuit 500 provided in the embodiment of the present invention includes: a control terminal is connected with a control switch 510 and a bleeder resistor 520 of the control system. The second end of the control switch 510 is connected to the first end of the bleeder resistor 520, and the first end of the control switch 510 and the second end of the bleeder resistor 520 are respectively connected to two output ends of the stack.
The air system 300 provided by the embodiment of the invention comprises an air compressor connected with the control system 600. And two output ends of the electric pile 100 are connected with an electronic load 700 connected with the control system 600 and the air compressor, and the control system 600 controls the electronic load 700 to supply power to the air compressor. As shown in fig. 3, the electronic load 700 according to the embodiment of the present invention includes a DCDC circuit 710 connected to two output terminals of the stack 100, and a power battery 720 connected to an output terminal of the DCDC circuit 710; the air compressor is connected with the DCDC circuit 710, the control system 600 is connected with the DCDC circuit 710, and when the control system 600 judges that the gas pipeline cannot provide the purge gas with the set pressure, the control system controls the DCDC circuit to supply power to the air compressor.
In an embodiment of the present invention, the safety protection maintenance device provided by the present invention may be disposed in a hydrogen fuel cell engine (wherein a control command may be sent out by the hydrogen fuel cell engine, and the bleed circuit may be reused with an internal circuit of the hydrogen fuel cell engine); or may be provided in the DCDC circuit (where the control instructions may be issued by the DCDC circuit and the bleeding circuit may multiplex circuitry within the DCDC circuit); or may be fabricated as a stand-alone device structure; alternatively, the safety protection maintenance device may be partially disposed in the hydrogen fuel cell engine and partially disposed in the DCDC circuit (wherein the control command may be issued by both the hydrogen fuel cell engine and the DCDC circuit), and the present invention is not particularly limited thereto.
Correspondingly, the embodiment of the invention also provides a safety protection overhauling method for the hydrogen fuel cell engine, and the safety protection overhauling device for the hydrogen fuel cell engine provided by any one of the embodiments is adopted. As shown in fig. 4, a flow chart of a safety protection maintenance method for a hydrogen fuel cell engine according to an embodiment of the present invention is shown, where the safety protection maintenance method includes:
and S1, the control system judges whether a gas pipeline can introduce purge gas with set pressure into the galvanic pile, wherein the gas pipeline is a pipeline of the hydrogen system and/or the air system.
If yes, S2, controlling the valve of the gas pipeline to be conducted so as to introduce purge gas with set pressure into the galvanic pile.
If not, S3, controlling the valve of the air system to be conducted, and simultaneously controlling the opening of the bleeder circuit to work.
It can be understood that, according to the technical scheme provided by the embodiment of the invention, before the hydrogen fuel cell engine is required to be disassembled and maintained for troubleshooting, whether the residual hydrogen in the stack can be completely purged through the gas pipeline is judged through the control system, and if the gas pipeline can pass through the purge gas with set pressure, the purge gas is preferentially selected to be adopted to purge the residual hydrogen in the stack. If the gas pipeline can not provide the purging gas with the set pressure, the residual hydrogen in the galvanic pile is consumed to generate the residual electric quantity in a mode of introducing air into the galvanic pile, and the residual electric quantity is discharged through the discharge circuit, so that the purpose of removing the residual hydrogen in the galvanic pile is fulfilled. Therefore, the technical scheme provided by the embodiment of the invention can actively remove residual hydrogen in the galvanic pile and ensure the safety of maintenance personnel and an engine.
In an embodiment of the invention, the control system controls the valve of the air system to be conducted, and controls the air system to introduce air into the galvanic pile at a set flow rate and pressure when the bleed circuit is controlled to be opened and operated.
The safety protection overhaul method provided by the embodiment of the invention is described in more detail below with reference to fig. 5. Wherein, air system includes air compressor, and the safety protection maintenance method includes:
s1, the control system judges whether the gas pipeline can introduce purge gas with set pressure into the galvanic pile, if so, the control system goes to step S2; if not, the process proceeds to step S31.
And S2, controlling the valve of the gas pipeline to be conducted so as to introduce purge gas with set pressure into the galvanic pile, starting timing, and entering the step S21.
S21, judging whether the accumulated time of the gas pipeline for introducing the purge gas with the set pressure into the galvanic pile reaches a set value, if so, entering the step S22; if not, keeping introducing the purge gas with the set pressure into the galvanic pile until the accumulated time length is judged to reach the set value, and entering the step S22.
And S22, turning off the gas source of the purge gas, controlling valves of the air system and the hydrogen system to recover the initial state, and finishing the removal of residual hydrogen in the galvanic pile.
And S31, controlling the air compressor to be electrified, controlling the relief circuit to be started to work at the same time, and entering the step S32.
S32, judging whether the air compressor is successfully electrified, if so, entering the step S33; if not, continuing to electrify the air compressor until the electrification is successful, and then entering the step S33.
And S33, controlling a valve of the air system to be conducted by the control system, controlling the air compressor to work to enable the air system to introduce air into the galvanic pile at the set flow rate and pressure, starting timing, and entering the step S34.
S34, judging whether the time length of introducing air into the galvanic pile by setting the flow and the pressure is not less than a time length threshold value, if so, entering a step S35; if not, keeping the air introduced into the galvanic pile at the set flow rate and pressure until the accumulated time is not less than the time threshold, and entering step S35.
S35, judging whether the voltage output by the galvanic pile is smaller than the threshold voltage, if so, entering the step S37; if not, the process proceeds to step S36.
S36, judging whether the time for introducing air into the galvanic pile at the set flow and pressure is greater than a troubleshooting time threshold, wherein the troubleshooting time threshold is greater than the time threshold, if so, performing fault alarm, and suggesting whether the inlet of the hydrogen system is shut down or leakage exists; if not, the process proceeds to step S37 when the voltage output from the cell stack is less than the threshold voltage.
And S37, controlling the air compressor to stop and power off by the control system, controlling a valve of the air system to recover to an initial state, and controlling the relief circuit to stop working to finish the removal of residual hydrogen in the galvanic pile.
The embodiment of the invention provides a safety protection maintenance device and a method for a hydrogen fuel cell engine, wherein the hydrogen fuel cell engine comprises an electric pile, a hydrogen system communicated with the electric pile and an air system communicated with the electric pile, and the safety protection maintenance device comprises: the bleeder circuit is connected between two output ends of the galvanic pile and used for discharging residual electric quantity generated by the galvanic pile; the control system is connected with the hydrogen system, the air system and the relief circuit and is used for judging whether the gas pipeline can introduce purge gas with set pressure into the galvanic pile or not, and if so, the valve of the gas pipeline is controlled to be conducted so as to introduce purge gas with set pressure into the galvanic pile; if not, controlling the valve of the air system to be conducted, and simultaneously controlling the relief circuit to be started to work. The technical scheme provided by the embodiment of the invention can actively remove residual hydrogen in the galvanic pile and ensure the safety of maintenance personnel and an engine.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. A hydrogen fuel cell engine is with safety protection maintenance device which characterized in that, hydrogen fuel cell engine includes the galvanic pile, with the hydrogen system of galvanic pile intercommunication and with the air system of galvanic pile intercommunication, safety protection maintenance device includes:
the bleeder circuit is connected between two output ends of the galvanic pile and used for discharging residual electric quantity generated by the galvanic pile; the control system is connected with the hydrogen system, the air system and the bleeder circuit, and is used for judging whether a gas pipeline can introduce purge gas with set pressure into the galvanic pile, wherein the gas pipeline is the pipeline of the hydrogen system and/or the air system, if so, a valve of the gas pipeline is controlled to be communicated so as to introduce purge gas with set pressure into the galvanic pile, and the purge gas is nitrogen; if not, controlling the valve of the air system to be conducted, simultaneously controlling the bleeder circuit to be started to work, and controlling the air system to introduce air into the galvanic pile at a set flow and pressure.
2. The safety protection maintenance device for a hydrogen fuel cell engine according to claim 1, wherein the relief circuit comprises: the control end of the control switch is connected with the control system;
the second end of the control switch is connected with the first end of the bleeder resistor, and the first end of the control switch and the second end of the bleeder resistor are respectively connected with the two output ends of the galvanic pile.
3. The safety protection maintenance device for the hydrogen fuel cell engine according to claim 1, wherein when the control system controls the valve of the gas pipeline to be turned on, the control system controls the accumulated time for introducing the purge gas into the stack to reach a set value.
4. The safety protection maintenance device for the hydrogen fuel cell engine according to claim 1, wherein the air system includes an air compressor connected to the control system, and the control system controls the air compressor to generate the air at the set flow rate and pressure.
5. The safety protection maintenance device for the hydrogen fuel cell engine according to claim 4, wherein an electronic load connected with the control system and the air compressor is connected to two output ends of the electric pile, and the control system controls the electronic load to supply power to the air compressor.
6. The safety protection maintenance device for the hydrogen fuel cell engine according to claim 5, wherein the electronic load includes a DCDC circuit connected to both output terminals of the stack, and a power cell connected to an output terminal of the DCDC circuit;
the air compressor is connected with the DCDC circuit, and the control system is connected with the DCDC circuit.
7. A safety protection maintenance method for a hydrogen fuel cell engine, characterized in that the safety protection maintenance device for a hydrogen fuel cell engine according to any one of claims 1 to 6 is used, and the safety protection maintenance method comprises:
the control system judges whether a gas pipeline can introduce purge gas with set pressure into the galvanic pile, the gas pipeline is a pipeline of the hydrogen system and/or the air system, if so, a valve of the gas pipeline is controlled to be communicated so as to introduce purge gas with set pressure into the galvanic pile, and the purge gas is nitrogen;
if not, controlling the valve of the air system to be conducted, simultaneously controlling the bleeder circuit to be started to work, and controlling the air system to introduce air into the galvanic pile at a set flow and pressure.
8. The safety protection and maintenance method for the hydrogen fuel cell engine according to claim 7, wherein the control system controls the valve of the air system to be conducted, and controls the air system to introduce air to the stack at a set flow rate and pressure when the bleed circuit is opened to operate.
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