CN114695920A - Hydrogen spraying injection device with different calibers and control method thereof - Google Patents
Hydrogen spraying injection device with different calibers and control method thereof Download PDFInfo
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- CN114695920A CN114695920A CN202210483882.6A CN202210483882A CN114695920A CN 114695920 A CN114695920 A CN 114695920A CN 202210483882 A CN202210483882 A CN 202210483882A CN 114695920 A CN114695920 A CN 114695920A
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- Prior art keywords
- hydrogen
- fuel cell
- cell stack
- injector
- injection device
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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
- H01M8/04082—Arrangements for control of reactant parameters, e.g. pressure or concentration
- H01M8/04201—Reactant storage and supply, e.g. means for feeding, pipes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
- B05B12/04—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery for sequential operation or multiple outlets
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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
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04753—Pressure; Flow of fuel cell reactants
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- Sustainable Development (AREA)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention provides a hydrogen injection device with different calibers and a control method thereof, wherein the hydrogen injection device with different calibers comprises a hydrogen injector and a fuel cell stack, the hydrogen injector is provided with a plurality of nozzles with different calibers, and a hydrogen inlet pipeline of the fuel cell stack is sequentially provided with a pressure reducing valve, a safety valve, a first pressure sensor, the hydrogen injector, a second pressure sensor, an exhaust valve, a controller and an upper computer; the control method comprises the following steps: the upper computer obtains the working power of the fuel cell stack and compares the working power with a preset threshold value, and sends an instruction to the controller, and the controller controls nozzles with different calibers of the hydrogen injector to start working. According to the invention, nozzles with different calibers are switched according to different hydrogen consumption, so that the hydrogen pressure control is more stable, and when the hydrogen side pressure is unstable, the fault hydrogen injection can be quickly positioned according to the power interval, so that one hydrogen injection can meet the use of different power intervals.
Description
Technical Field
The invention belongs to the technical field of fuel cell hydrogen injection devices, and particularly relates to a hydrogen injection device with different calibers and a control method thereof.
Background
The use of traditional fossil energy has caused serious environmental crisis such as greenhouse effect, thawing of polar glaciers, acid rain, etc., and clean energy which can replace fossil energy is being searched globally. The hydrogen is an ideal energy carrier, has the advantages of light weight, no pollution of products and the like, and the hydrogen fuel cell is a clean energy technology power generation system and converts chemical energy generated by chemical reaction in the device into electric energy.
Compared with the traditional internal combustion engine automobile, the hydrogen fuel cell automobile has two main characteristics: the first energy conversion efficiency is high without pollution. The working principle of the fuel cell power generation system is the reverse reaction of electrolytic water, fuel and oxygen are required to be provided for the fuel cell in the using process, and the fuel cell system needs to continuously provide the fuel and the oxygen with certain pressure and flow rate when continuously generating power.
With the development of fuel cell engines, which have been increasingly powered, the supply of fuel is controlled using multi-nozzle hydrogen injection or proportional valves. When the fuel cell engine uses hydrogen injection or proportional valve to control the fuel supply of the anode, the caliber of the injection nozzle is the same and meets the use requirement of the engine by depending on control calibration.
The hydrogen injection device of the high-power fuel cell engine uses the same-caliber nozzle and cannot meet the requirement of the full-power interval of the engine, when the small-caliber nozzle is selected, the low-power working interval is used, when the high power is reached, the number of the nozzles needs to be increased to meet the requirement of the use, when the large-caliber nozzle is selected, the medium-high power interval is used, and the problem of pressure overshoot is easily caused when the large-caliber nozzle is used in the low-power interval.
Disclosure of Invention
The invention provides a hydrogen injection device with different calibers and a control method thereof, aiming at the problems in the prior art. The hydrogen injection device comprises a hydrogen injector and a fuel cell stack, wherein the hydrogen injector is arranged on a hydrogen inlet pipeline of the fuel cell stack, and the hydrogen injector is provided with a plurality of nozzles with different calibers.
Further, a pressure reducing valve is arranged between the hydrogen injector and the hydrogen source and used for reducing the pressure of the high-pressure hydrogen flowing out of the hydrogen source to be adjusted to the low-pressure hydrogen needed by the hydrogen injector.
Further, a safety valve is arranged between the hydrogen injector and the pressure reducing valve and used for achieving a pressure safety protection effect in the system.
Furthermore, a first pressure sensor is arranged between the hydrogen injector and the safety valve, and used for monitoring the hydrogen pressure at the inlet of the hydrogen injector; and a second pressure sensor is arranged between the hydrogen injector and the fuel cell stack and used for monitoring the pressure change of the fuel cell stack.
Furthermore, a hydrogen ejector is arranged between the hydrogen ejector and the second pressure sensor and used for recycling tail gas of the fuel cell stack.
Furthermore, an exhaust valve is arranged at the connection position of the hydrogen ejector and the hydrogen tail exhaust pipeline of the fuel cell stack and used for discharging waste on the hydrogen side.
Furthermore, the hydrogen jet injection device with different calibers further comprises a controller and an upper computer; the controller is respectively connected with the first pressure sensor, the hydrogen ejector and the second pressure sensor through cables, respectively reads pressure information of the first pressure sensor and the second pressure sensor and working power information of the fuel cell stack, controls the hydrogen ejector, and is connected with the controller through a network, monitors component parameters and issues control instructions.
The invention also provides a control method of the hydrogen jet injection device with different calibers, which comprises the following steps: the upper computer obtains the working power P of the fuel cell stack, compares the working power P with preset thresholds P1 and P2 (P1 is less than P2), issues an instruction to the controller, and when the working power of the fuel cell stack is detected to be smaller than a low threshold, the controller controls a small-caliber nozzle of the hydrogen injector to start working; when the working power of the fuel cell stack is detected to be between a low threshold value and a high threshold value, the controller controls a medium-caliber nozzle of the hydrogen injector to start working; when the working power of the fuel cell stack is detected to be higher than a high threshold value, the controller controls the large-caliber nozzle of the hydrogen injector to start working, and one hydrogen injector is used in different power intervals. More nozzles with different calibers can be arranged, more power thresholds are preset, and more levels of control are realized.
According to the invention, nozzles with different calibers are switched according to different hydrogen consumption, so that the hydrogen pressure control is more stable, and when the hydrogen side pressure is unstable, the fault hydrogen injection can be quickly positioned according to the power interval, so that one hydrogen injection can meet the use of different power intervals.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the disclosure.
Fig. 1 shows a hydrogen jet injection device of different caliber in the embodiment of the present invention.
Reference numerals: the fuel cell system comprises a pressure reducing valve 1, a safety valve 2, a first pressure sensor 3 (P-1), a hydrogen ejector 4 (comprising three nozzles with different calibers), a hydrogen ejector 5, a second pressure sensor 6 (P-2), a fuel cell stack 7, an exhaust valve 8, a controller 9 (VCU) and an upper computer 10.
Detailed Description
Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The term "include" and variations thereof as used herein is meant to be inclusive in an open-ended manner, i.e., "including but not limited to". The term "or" means "and/or" unless specifically stated otherwise. The term "based on" means "based at least in part on". The terms "connected" and "communicating" mean connected or communicating either directly or indirectly through other components. The terms "first," "second," and the like may refer to different or the same items, but do not directly indicate a difference in order of precedence or degree of importance. Other explicit and implicit definitions are also possible below.
As shown in fig. 1, the present invention provides a hydrogen jet injection device of different caliber.
A hydrogen injection device with different apertures comprises a hydrogen injector 4 and a fuel cell stack 7, wherein the hydrogen injector 4 is arranged on a hydrogen inlet pipeline of the fuel cell stack 7, and the hydrogen injector 4 is provided with three nozzles (I) with different apertures.
A pressure reducing valve 1 is provided between the hydrogen injector 4 and the hydrogen source for pressure reducing and adjusting the high-pressure hydrogen gas flowing out from the hydrogen source to the low-pressure hydrogen gas required by the hydrogen injector 4.
A safety valve 2 is arranged between the hydrogen injector 4 and the pressure reducing valve 1 for performing a pressure safety protection function in the system.
A first pressure sensor 3 is arranged between the hydrogen injector 4 and the safety valve 2, and monitors the hydrogen pressure at the inlet of the hydrogen injector 4; and a second pressure sensor 6 is arranged between the hydrogen injector 4 and the fuel cell stack 7, and is used for monitoring the stack pressure change of the fuel cell stack 7.
And a hydrogen ejector 5 is arranged between the hydrogen ejector 4 and the second pressure sensor 6 and used for recycling tail gas of the fuel cell stack 7.
And an exhaust valve 8 is arranged at the joint of the hydrogen ejector 5 and the hydrogen tail exhaust pipeline of the fuel cell stack 7 and is used for controlling the waste discharge of the hydrogen side.
The hydrogen spraying and jetting device with different calibers further comprises a controller 9 and an upper computer 10; the controller 9 is respectively connected with the first pressure sensor 3, the hydrogen ejector 4, the hydrogen ejector 5 and the second pressure sensor 6 through cables, respectively reads the pressure information of the first pressure sensor 3 and the second pressure sensor 6, and the working power information of the fuel cell stack 7 to control the hydrogen ejector 4, the upper computer 10 is connected with the controller 9 through a network, monitors component parameters and issues control instructions.
In the working process of the fuel cell stack, a hydrogen source flows through the pressure reducing valve 1, the safety valve 2, the first pressure sensor 3 (P-1), the hydrogen ejector 4, the hydrogen ejector 5 and the second pressure sensor 6 (P-2) to reach the fuel cell stack 7, water generated by the operation of the fuel cell stack 7 and unreacted hydrogen flow back to the inlet of the fuel cell stack 7 from the outlet of the fuel cell stack 7 through the hydrogen ejector 5 for recycling and humidifying, and redundant water and impurity gas are discharged through the exhaust valve 8.
The invention also provides a control method of the hydrogen jet injection device with different calibers, which comprises the following steps:
the upper computer 10 obtains the working power P of the fuel cell stack 7, compares the working power P with preset thresholds P1 and P2 (P1 is less than P2), issues an instruction to the controller 9, and when the working power of the fuel cell stack 7 is detected to be less than a low threshold, the controller 9 controls the small-caliber nozzle of the hydrogen injector 4 to start working; when the working power of the fuel cell stack 7 is detected to be between a low threshold value and a high threshold value, the controller controls the medium-caliber nozzle of the hydrogen injector 4 to start working; when the working power of the fuel cell stack 7 is detected to be higher than a high threshold value, the controller 9 controls the large-diameter nozzle of the hydrogen injector 4 to start working, and one hydrogen injection is realized to meet the use of different power intervals.
For example, when the working power P of the fuel cell stack 7 is detected to be equal to or less than P1, the controller 9 controls the nozzle (small-diameter nozzle) of the hydrogen injector 4 to start to operate, when the working power P1 of the fuel cell stack is detected to be equal to or less than P2, the controller 9 controls the nozzle (middle-diameter nozzle) of the hydrogen injector 4 to start to operate, and when the working power P2 of the fuel cell stack 7 is detected to be equal to or less than P2, the controller 9 controls the nozzle (large-diameter nozzle) of the hydrogen injector 4 to start to operate, so that one hydrogen injection can meet different power intervals. More nozzles with different calibers can be arranged, more power thresholds are preset, and more levels of control are realized.
According to the invention, nozzles with different calibers are switched according to different hydrogen consumption, so that the hydrogen pressure control is more stable, and when the hydrogen side pressure is unstable, the fault hydrogen injection can be quickly positioned according to the power interval, so that one hydrogen injection can meet the use of different power intervals.
Having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles of the embodiments, the practical application, or improvements made to the prior art, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (8)
1. The hydrogen injection device with different calibers is characterized by comprising a hydrogen injector and a fuel cell stack, wherein the hydrogen injector is arranged on a hydrogen inlet pipeline of the fuel cell stack, and the hydrogen injector is provided with a plurality of nozzles with different calibers.
2. The different-caliber hydrogen injection device according to claim 1, wherein a pressure reducing valve is arranged between the hydrogen injector and the hydrogen source.
3. The hydrogen injection apparatus of claim 2, wherein a safety valve is provided between the hydrogen injector and the pressure reducing valve.
4. The hydrogen injection device of claim 3, wherein a first pressure sensor is provided between the hydrogen injector and the safety valve; and a second pressure sensor is arranged between the hydrogen injector and the fuel cell stack.
5. The hydrogen injection device with different calibers according to claim 4, wherein a hydrogen ejector is arranged between the hydrogen injector and the second pressure sensor.
6. The hydrogen injection device with different calibers according to claim 5, wherein a vent valve is arranged at the connection position of the hydrogen injector and the hydrogen tail discharge pipeline of the fuel cell stack.
7. The hydrogen injection device with different calibers according to claim 6, which is characterized by comprising a controller and an upper computer; the controller is respectively connected with the first pressure sensor, the hydrogen ejector, the second pressure sensor and the fuel cell stack through cables, respectively reads pressure information of the first pressure sensor and the second pressure sensor and working power information of the fuel cell stack, controls the hydrogen ejector, and the upper computer is connected with the controller through a network.
8. A control method of the hydrogen injection device of different aperture according to claim 7, characterized in that the control method comprises: the upper computer obtains the working power of the fuel cell stack and compares the working power with a preset threshold value, an instruction is issued to the controller, and the controller controls nozzles with different calibers of the hydrogen injector to start working.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210483882.6A CN114695920A (en) | 2022-05-06 | 2022-05-06 | Hydrogen spraying injection device with different calibers and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210483882.6A CN114695920A (en) | 2022-05-06 | 2022-05-06 | Hydrogen spraying injection device with different calibers and control method thereof |
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| CN114695920A true CN114695920A (en) | 2022-07-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210483882.6A Pending CN114695920A (en) | 2022-05-06 | 2022-05-06 | Hydrogen spraying injection device with different calibers and control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115064728A (en) * | 2022-07-11 | 2022-09-16 | 山东华清动力科技有限公司 | Hydrogen circulating device for fuel cell |
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2022
- 2022-05-06 CN CN202210483882.6A patent/CN114695920A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115064728A (en) * | 2022-07-11 | 2022-09-16 | 山东华清动力科技有限公司 | Hydrogen circulating device for fuel cell |
| CN115064728B (en) * | 2022-07-11 | 2024-02-23 | 山东华清动力科技有限公司 | Hydrogen circulation device for fuel cell |
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