CN113224345B - Adjustable fuel cell end plate packaging structure - Google Patents
Adjustable fuel cell end plate packaging structure Download PDFInfo
- Publication number
- CN113224345B CN113224345B CN202110496437.9A CN202110496437A CN113224345B CN 113224345 B CN113224345 B CN 113224345B CN 202110496437 A CN202110496437 A CN 202110496437A CN 113224345 B CN113224345 B CN 113224345B
- Authority
- CN
- China
- Prior art keywords
- end plate
- disc spring
- valve
- flexible
- air inlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- H01M8/02—Details
- H01M8/0271—Sealing or supporting means around electrodes, matrices or membranes
-
- 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
- H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
- H01M8/2465—Details of groupings of fuel cells
- H01M8/247—Arrangements for tightening a stack, for accommodation of a stack in a tank or for assembling different tanks
- H01M8/2475—Enclosures, casings or containers of fuel cell stacks
-
- 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
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Fuel Cell (AREA)
Abstract
The invention belongs to the technical field of fuel cell packaging, and particularly relates to an adjustable fuel cell end plate packaging structure which comprises a reactor core, current collecting plates tightly arranged on the upper surface and the lower surface of the reactor core, and an upper end plate and a lower end plate respectively arranged above and below the current collecting plates, wherein the left end part, the right end part and the middle position of the upper end plate and the lower end plate are respectively connected through a first positioning insulating screw, a second positioning insulating screw and a third positioning insulating screw; the air inlet assembly comprises an air filter element and an air compressor connected with the air filter element, and a flowmeter is arranged between the air filter element and the air compressor; when the pre-tightening force of each screw of the galvanic pile is insufficient, the compensation device is adopted to provide compensation, so that the uniformity of the pressing force of the end plate can be ensured, and the output performance of the galvanic pile is improved.
Description
Technical Field
The invention belongs to the technical field of fuel cell packaging, and particularly relates to an adjustable fuel cell end plate packaging structure.
Background
The shortage of petroleum energy and the pollution of the atmospheric environment are significant problems facing the world today. The tail gas discharged in transportation is one of the main sources of air pollution and greenhouse gas, so that the development of new energy automobiles is imperative to carry out traffic energy transformation. The hydrogen fuel cell has many advantages such as high efficiency, high reliability, no pollution, etc. and has received wide attention. The fuel cell is formed by packaging a plurality of single cells, current collecting plates and insulating plates connected in series together by end plates and fasteners. The monocell consists of bipolar plate, sealing part and membrane electrode, and in order to make the cell operate stably and safely, each part needs to have certain contact pressure to ensure the working pressure of gas in the pile and prevent gas leakage. However, in the operation process of the fuel cell stack, under the influence of high and low temperature environments, the compression force of the stack can be changed due to expansion and contraction of heat and cold of each component in the stack, so that each component is deformed, gas leakage is caused, the use safety of the stack is influenced, and the performance of the stack is reduced. In general, materials with resilience characteristics such as spring washers and disc springs are used on the screws to prevent the stack from deforming, but the end plates and the like are warped due to inconsistent moments generated by the screws, so that contact stress among internal parts of the stack is unevenly distributed, and the performance of the stack is reduced.
In the prior art: patent CN110931834A discloses an adjustable fuel cell packaging structure, which includes a positioning insulating pull rod and a pull belt; one end of the positioning insulating pull rod is arranged on a blind end plate of the pile through an anti-rotation structure, and the other end of the positioning insulating pull rod is fixedly connected with an air port end plate and a pull belt of the pile through screws; the surface of the gas port end plate is provided with an end plate groove, the drawstring is positioned in the end plate groove and used for compensating the uneven deformation of the gas port end plate caused by insufficient rigidity, namely the gas port end plate is prevented from deforming, and two ends of the drawstring are respectively connected with a positioning insulating pull rod; the end plate groove can restrain the pull belt and position the position of the insulation pull rod, and the electric pile can be fastened better. According to the scheme, the electric pile is fastened by the positioning insulating screw and the pull belt, so that stress compensation after deformation of the electric pile is ensured. But more auxiliary elements are needed to restrain the drawstring and position the insulated screw, increasing the complexity of assembly; the magnitude of the packaging force cannot be actively adjusted and the contact pressure uniformity distribution cannot be ensured.
Patent CN107611466A discloses a packaging structure of fuel cell stack, including last lower plate and, insulating board, current collection board, galvanic pile body, parts such as insulating dead lever, insulating clamping screw and with the end plate on the nut phase-match be used for fastening the galvanic pile, go up lower plate and open the groove and fix a position with the leaf spring, for the inside invariable assembly pressure that provides of galvanic pile. The limitations of this structure are: the pile assembly complexity is higher, need complicated location frock, and the size that can not adjust the encapsulation power when the inside high slight change of pile takes place, can't compensate the pressure distribution of end plate.
Patent CN108346814A discloses a fastening device for fuel cell stack, which comprises three steel belts, two arc-shaped elastic components and a special short plate structure, and can well resist external excitation from different directions, and prevent the phenomenon of waist collapse caused by vibration. However, the third steel belt is pressed onto the first steel belt through the reflection arc, so that the stress of the elastic reflection arc is increased, and the reliability of packaging is not facilitated; the insulation problem of connectors such as steel belts and the like is not considered, and the packaging process is complex.
Patent CN211605305U discloses a pile end plate subassembly and proton exchange membrane fuel cell, and pile end plate subassembly has contained end plate, pressure strip, compression spring and connecting bolt, and is similar with conventional bolt encapsulation principle, and the difference has installed compression spring and pressure strip additional above the end plate, has avoided the centre of pile end plate to pile outside arch, has improved the wholeness ability of pile. The disadvantage of this solution is that it is not resistant to vibrations from the non-compression direction, and secondly the compression plate is rigidly connected to the connecting bolt, and the continuous deformation of the material may lead to a loosening failure of the rigid connection.
Most of the existing fuel cell packaging structures adopt steel belts and bolts for fastening, when the interior of the stack deforms under the influence of temperature, the fastening device is difficult to actively adjust the change difference of pressing force, and the stress uniformity of the components in the stack cannot be ensured; in part of packaging technologies, elastic elements such as disc springs and gaskets are added at bolt fastening positions to improve the shock resistance of the stack and resist height difference generated by material deformation, even though the method can keep pressure distribution of all parts in the stack uniform to a certain degree, fastening force of all screws when the specific in-stack height is reached may cause inconsistent normal stress of the end plate and even warping due to inconsistent torque. Therefore, the packaging structure of active distributed automatic regulation is crucial to the electric stack packaging and ensuring the uniform pressure distribution in the stack.
Disclosure of Invention
Based on the defects of the prior art, the technical problem to be solved by the invention is to provide an adjustable fuel cell end plate packaging structure, the compensation device is adopted to realize the active adjustment of the stack pressing force, and the end plate warping phenomenon caused by the inconsistent fastening force of each screw when the internal material of the stack reaches the specific stack height after being expanded with heat and contracted with cold is avoided; and the impact of external load can be resisted, the bolt looseness phenomenon is avoided, the uniformity of the pressing force of the end plate can be ensured, and the output performance of the galvanic pile is improved.
In order to solve the technical problems, the invention is realized by the following technical scheme:
an adjustable fuel cell end plate packaging structure comprises a reactor core, collector plates tightly arranged on the upper surface and the lower surface of the reactor core, and an upper end plate and a lower end plate which are respectively arranged above and below the collector plates, wherein the left end part, the right end part and the middle position of the upper end plate and the lower end plate are respectively provided with a first positioning insulating screw, a second positioning insulating screw and a third positioning insulating screw for connection, and the first positioning insulating screw, the second positioning insulating screw and the third positioning insulating screw are used for connecting the upper end plate and the lower end plate; the adjustable fuel cell end plate packaging structure further comprises a compensation device, the compensation device comprises an air inlet assembly and a plurality of groups of compensation mechanisms connected with the air inlet assembly, the air inlet assembly comprises an air filter element and an air compressor connected with the air filter element, a flow meter is arranged between the air filter element and the air compressor, and an outlet of the air compressor is respectively connected with the one-way stop valve and the reactor core of the electric pile through a three-way valve; an actuator is arranged on one side of the one-way stop valve, and a pressure sensor is arranged on a pipeline between the air compressor and the reactor core of the electric pile; the multi-group compensation mechanism comprises a first group of compensation mechanism, a second group of compensation mechanism and a third group of compensation mechanism which are sequentially arranged at intervals at the upper end plate at the right end position, the middle position and the left end position, and a fourth group of compensation mechanism, a fifth group of compensation mechanism and a sixth group of compensation mechanism which are sequentially arranged at intervals at the left end position, the middle position and the right end position on the upper end plate.
Further, the first group of compensation mechanisms comprise a first flow regulating valve, a first pressure sensor, a first quick discharge valve and a first flexible inflation bag, wherein the first flow regulating valve, the first pressure sensor and the first quick discharge valve are arranged on the outer side of the lower end plate; the first flow regulating valve is connected with an air inlet pipeline of a first flexible air bag, and the first flexible air bag is respectively connected with a cathode air inlet of the reactor core of the electric pile, a first pressure sensor and a first quick discharge valve through a three-way valve.
Further, the second group of compensation mechanisms comprise a second flow regulating valve, a second pressure sensor and a second quick discharge valve which are arranged on the outer side of the lower end plate, and a second flexible inflation bag arranged inside the lower end plate; and the second flow regulating valve is connected with an air inlet pipeline of a second flexible air bag, and the second flexible air bag is respectively connected with a cathode air inlet of the reactor core of the electric pile, a second pressure sensor and a second quick discharge valve through a three-way valve.
Further, the third group of compensation mechanisms comprises a third flow regulating valve, a third pressure sensor and a third quick discharge valve which are arranged on the outer side of the lower end plate, and a third flexible air bag arranged in the lower end plate; and the third flow regulating valve is connected with an air inlet pipeline of a third flexible air bag, and the third flexible air bag is respectively connected with a cathode air inlet of the reactor core of the electric pile, a third pressure sensor and a third quick discharge valve through a three-way valve.
Furthermore, the fourth group of compensation mechanisms comprises a fourth flow regulating valve, a fourth pressure sensor, a fourth quick discharge valve and a fourth flexible inflation bag, wherein the fourth flow regulating valve, the fourth pressure sensor and the fourth quick discharge valve are arranged on the outer side of the upper end plate; and the fourth flow regulating valve is connected with an air inlet pipeline of a fourth flexible air bag, and the fourth flexible air bag is respectively connected with a cathode air inlet of the reactor core of the electric pile, a fourth pressure sensor and a fourth quick discharge valve through a three-way valve.
Furthermore, the fifth group of compensation mechanisms comprises a fifth flow regulating valve, a fifth pressure sensor, a fifth quick discharge valve and a fifth flexible inflatable bag, wherein the fifth flow regulating valve, the fifth pressure sensor and the fifth quick discharge valve are arranged on the outer side of the upper end plate; and the fifth flow regulating valve is connected with an air inlet pipeline of a fifth flexible air bag, and the fifth flexible air bag is respectively connected with a cathode air inlet of the reactor core of the electric pile, a fifth pressure sensor and a fifth quick discharge valve through a three-way valve.
Furthermore, the sixth group of compensation mechanisms comprises a sixth flow regulating valve, a sixth pressure sensor, a sixth quick discharge valve and a sixth flexible inflatable bag, wherein the sixth flow regulating valve, the sixth pressure sensor and the sixth quick discharge valve are arranged on the outer side of the upper end plate; and the sixth flow regulating valve is connected with an air inlet pipeline of a sixth flexible gas bag, and the sixth flexible gas bag is respectively connected with a cathode air inlet of the reactor core of the electric pile, a sixth pressure sensor and a sixth quick discharge valve through a three-way valve.
Furthermore, the compensation device further comprises a first disc spring, a second disc spring, a third disc spring, a fourth disc spring, a fifth disc spring and a sixth disc spring, wherein the first disc spring, the second disc spring and the third disc spring are respectively arranged at the right end position, the middle position and the left end position of the upper end plate, and the fourth disc spring, the fifth disc spring and the sixth disc spring are respectively arranged at the right end position, the middle position and the left end position of the lower end plate.
Furthermore, the compensation device further comprises a first disc spring displacement sensor arranged on the side portion of the first disc spring, a second disc spring displacement sensor arranged on the side portion of the second disc spring, a third disc spring displacement sensor arranged on the side portion of the third disc spring, a fourth disc spring displacement sensor arranged on the side portion of the fourth disc spring, a fifth disc spring displacement sensor arranged on the side portion of the fifth disc spring, and a sixth disc spring displacement sensor arranged on the side portion of the sixth disc spring.
Therefore, the compensation device can provide compensation when the pretightening force of each screw of the pile is insufficient, the realization mode is that when the displacement change of the disc spring exceeds a threshold value, the pretightening force is insufficient, and at the moment, the compensation device is opened for compensation, so that the problem of inconsistent stress of the end plate caused by insufficient (loose) pretightening force of the screw due to expansion with heat and contraction with cold in the pile and external load impact can be solved.
In the invention, the compensation device (comprising a working stage and a safety stage) is adopted, so that the distributed active compensation of the galvanic pile can be realized, and the safety of the compensation device is ensured.
When the compensation position is in the working stage, the rotating speed and the opening degree of the flow valve of the air compressor are controlled, the air inlet pressure and the air inlet flow are adjusted according to the stroke changes of different bolt disc springs, and the packaging pressure is compensated. The air inlet pressure is adjusted by comparing the stroke change difference before and after the compression of the disc spring through the sensor, and when the change value before and after the compression is lower than a set value, the pressing force of the compensation device is considered to meet the packaging requirement.
When the position supplementing device is in a safety stage, the opening degree of the flow valve and the opening degree of the quick discharge valve are controlled, and the air inlet pressure and the opening degree of the discharge valve are adjusted according to the pressure change of the compensation device. The inlet pressure is regulated by monitoring the compensator pressure sensor signal, opening the quick exhaust valve when the pressure exceeds a safe threshold, and closing the quick exhaust valve when the compensator pressure falls below the safe threshold. When the pressing force of the compensating device is larger than the required pressing force, the opening degree of the quick discharge valve can be controlled to meet the use requirement.
The working flow of the compensation device of the invention is as follows: firstly, when gas passes through an air compressor, judging whether a one-way stop valve is opened or not according to a displacement sensor, if not, enabling the gas to enter a cathode of a galvanic pile to provide an oxidant for normal work of the galvanic pile; if the one-way stop valve is opened, firstly calculating the magnitude of the currently required compensation pressure according to the numerical values of different disc spring sensors, then judging whether the outlet pressure of the air compressor meets the requirement, if so, performing inflation compensation according to the pressure required by different air supply devices and judging whether the current pressure is greater than a safety threshold value according to the numerical values of pressure sensors of the compensation devices, if so, opening the quick discharge valve to reduce the pressure to be below the safety threshold value, if not, ending inflation, and keeping the current pressing force; when the air pressure at the outlet of the air compressor does not meet the pressure required by the compensation device, the pressure required by the current compensation device is met by adjusting the rotating speed of the air compressor and the opening degree of the flow control valve.
Therefore, the adjustable fuel cell end plate packaging structure provided by the invention at least has the following beneficial effects:
1. the invention adopts the compensation device to actively compensate the required pressing force according to the stroke change of different disc springs, thereby avoiding the phenomena of uneven pressing force distribution and gas leakage caused by thermal expansion and cooling of the internal material of the pile and external load impact.
2. The invention adopts the compensation device, which can ensure the supply of the galvanic pile oxidant and the active adjustment of the pressing force of the end plate, can also ensure the safety of the compensation device, has the characteristics of high response speed, simple structure and the like, enhances the stress consistency of the internal structure of the galvanic pile under different vehicle-mounted working conditions, and improves the output characteristic of the galvanic pile.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following detailed description is given in conjunction with the preferred embodiments, together with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the oxidant working path with the one-way shut-off valve closed according to the present invention;
FIG. 3 is a schematic diagram of the working path of the oxidant when the one-way shutoff valve is opened in the present invention;
FIG. 4 is a schematic diagram of a safe working path of the compensating device of the present invention;
fig. 5 is a flow chart of the operation of the compensating device of the present invention.
Detailed Description
Other aspects, features and advantages of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings, which illustrate, by way of example, the principles of the invention and which, together with the description, serve to explain the principles of the invention. In the referenced drawings, the same or similar components in different drawings are denoted by the same reference numerals.
Referring to fig. 1 to 5, the adjustable fuel cell end plate packaging structure of the present invention includes a stack core 39, current collecting plates 40 tightly disposed on the upper and lower surfaces of the stack core 39, and an upper end plate 32 and a lower end plate 34 respectively disposed above and below the current collecting plates 40, wherein first positioning insulating screws 33, second positioning insulating screws 38, and third positioning insulating screws for connecting the upper end plate 32 and the lower end plate 34 are respectively disposed at the left and right end portions and the middle portion of the upper end plate 32 and the lower end plate 34, and the first positioning insulating screws 33, the second positioning insulating screws 38, and the third positioning insulating screws are used for connecting the upper end plate 32 and the lower end plate 34.
The adjustable fuel cell end plate packaging structure further comprises a compensation device, the compensation device comprises an air inlet assembly and a plurality of groups of compensation mechanisms connected with the air inlet assembly, the air inlet assembly comprises an air filter element 1 and an air compressor 3 connected with the air filter element 1, a flowmeter 2 is arranged between the air filter element 1 and the air compressor 3, an outlet of the air compressor 3 is respectively connected with a one-way stop valve 6 and a reactor core 39 through a three-way valve, an actuator 4 is arranged on one side of the one-way stop valve 6, and a pressure sensor 5 is arranged on a pipeline between the air compressor 3 and the reactor core 39.
The plurality of compensation mechanisms comprise a first group of compensation mechanisms, a second group of compensation mechanisms and a third group of compensation mechanisms which are sequentially arranged at the right end position, the middle position and the left end position on the lower end plate 34 at intervals, and a fourth group of compensation mechanisms, a fifth group of compensation mechanisms and a sixth group of compensation mechanisms which are sequentially arranged at the left end position, the middle position and the right end position on the upper end plate 32 at intervals.
Specifically, the first group of compensation mechanisms includes a first flow regulating valve 7, a first pressure sensor 9, a first quick discharge valve 10, and a first flexible air bag 8, which are disposed outside the lower end plate 34, wherein the first flow regulating valve 7 is connected to an air inlet pipeline of the first flexible air bag 8, and the first flexible air bag 8 is connected to a cathode air inlet of the reactor core 39, the first pressure sensor 9, and the first quick discharge valve 10 through a three-way valve.
Specifically, the second group of compensation mechanisms includes a second flow control valve 11, a second pressure sensor 13, a second quick exhaust valve 14, and a second flexible airbag 12, which are disposed outside the lower end plate 34, wherein the second flow control valve 11 is connected to an air inlet pipeline of the second flexible airbag 12, and the second flexible airbag 12 is connected to a cathode air inlet of the reactor core 39 and the second pressure sensor 13 and the second quick exhaust valve 14 through a three-way valve.
Specifically, the third group of compensation mechanisms includes a third flow regulating valve 15, a third pressure sensor 17 and a third quick discharge valve 18 which are arranged on the outer side of the lower end plate 34, and a third flexible air bag 16 which is arranged inside the lower end plate 34, wherein the third flow regulating valve 18 is connected with an air inlet pipeline of the third flexible air bag 16, and the third flexible air bag 16 is respectively connected with a cathode air inlet of the reactor core 39 of the electric reactor, the third pressure sensor 17 and the third quick discharge valve 18 through a three-way valve.
Specifically, the fourth group of compensation mechanisms includes a fourth flow control valve 19, a fourth pressure sensor 21, a fourth fast exhaust valve 22, and a fourth flexible airbag 20, which are disposed on the outer side of the upper end plate 32, wherein the fourth flow control valve 19 is connected to an air inlet pipeline of the fourth flexible airbag 20, and the fourth flexible airbag 20 is connected to a cathode air inlet of the reactor core 39 of the stack, the fourth pressure sensor 21, and the fourth fast exhaust valve 22 through a three-way valve.
Specifically, the fifth group of compensation mechanisms includes a fifth flow control valve 23, a fifth pressure sensor 25, and a fifth fast exhaust valve 26, which are disposed on the outer side of the upper end plate 32, and a fifth flexible air bag 24 disposed inside the upper end plate 32, where the fifth flow control valve 23 is connected to an air inlet pipeline of the fifth flexible air bag 24, and the fifth flexible air bag 24 is connected to a cathode air inlet of the reactor core 39, the fifth pressure sensor 25, and the fifth fast exhaust valve 26 through a three-way valve.
Specifically, the sixth group of compensation mechanisms includes a sixth flow control valve 27, a sixth pressure sensor 29, and a sixth fast exhaust valve 30, which are disposed on the outer side of the upper end plate 32, and a sixth flexible air bag 28, which is disposed inside the upper end plate 32, wherein the sixth flow control valve 27 is connected to an air inlet pipeline of the sixth flexible air bag 28, and the sixth flexible air bag 28 is connected to a cathode air inlet of the reactor core 39, and the sixth pressure sensor 29 and the sixth fast exhaust valve 30 through a three-way valve, respectively.
In addition, the compensation device of the present invention further includes a first disc spring 31, a second disc spring 42, and a third disc spring 41 respectively disposed at the right end position, the middle position, and the left end position of the upper end plate 32, and a fourth disc spring 35, a fifth disc spring 36, and a sixth disc spring 37 respectively disposed at the right end position, the middle position, and the left end position of the lower end plate 34. The compensating device further comprises a first disc spring displacement sensor 06 arranged on the side of the first disc spring 31, a second disc spring displacement sensor 05 arranged on the side of the second disc spring 42, a third disc spring displacement sensor 04 arranged on the side of the third disc spring 41, a fourth disc spring displacement sensor 01 arranged on the side of the fourth disc spring 35, a fifth disc spring displacement sensor 02 arranged on the side of the fifth disc spring 36, and a sixth disc spring displacement sensor 03 arranged on the side of the sixth disc spring 37.
When the invention works: air enters an air flow meter 2 through an air filter element 1 and then enters an air compressor 3, when an actuator 4 receives any displacement change of the disc spring displacement sensors 01-06, a one-way stop valve 6 is opened, and then a compensation device with the largest disc spring displacement change is preferentially inflated to perform pressing force compensation; secondly, carrying out pressing force compensation one by one according to the displacement change size to ensure the uniform distribution of the pressing force of the end plate; for example, when the displacement change of the fifth disc spring 36 (corresponding to the fifth disc spring displacement sensor 02) is large, the second flexible airbag 12 needs to be rapidly inflated and compensated, the actuator 4 first opens the one-way stop valve 6 immediately after receiving the signal, and calculates the required pressure according to the stroke difference of the fifth disc spring 36, where the pressure formula is as follows: σ ═ E ([ delta ] L/L), where σ is the actual required pressure, Δ L is the displacement change value measured by the fifth disc spring displacement sensor 02, and L is the length of the fifth disc spring displacement sensor 02 after being pre-tightened; the pressure value fed back to the air compressor is P ═ sigma + delta P, and delta P is the pipeline pressure drop, and can be obtained according to the system calibration. And then adjusting the rotating speed of the air compressor 3, increasing the opening degree of the second flow regulating valve 11, inflating and pressurizing the second flexible inflatable bag 12, reducing the opening degree of the second flow regulating valve 11 when the compensation pressing force meets the requirement, adjusting the opening degree of the second quick discharge valve 14 to perform pressure relief operation when the pressure of the second flexible inflatable bag 12 exceeds the allowable pressure, and closing the discharge valve when the required pressure is reached.
When the actuator 4 does not receive the signal of the disc spring displacement sensor, the one-way stop valve 6 is kept closed, and the pressure sensor 5 adjusts the rotating speed of the air compressor 3 according to the required intake flow of the reactor core 39 so as to meet the supply of the reactor oxidant. The pressure sensor 5 has a higher priority for controlling the rotation speed of the compressor 3 than for controlling the actuator 4, and needs to ensure the supply of the stack oxidant.
Referring to fig. 2, when the actuator 4 does not receive the signals of the disc spring displacement sensors, the one-way shutoff valve 6 is closed, and the oxidant (air) flows through the air filter element 1 to the air flow meter 2 and then through the air compressor 3 to the reactor core 39 to provide the oxidant for the internal reaction of the reactor.
Referring to fig. 3, when the actuator 4 receives the signals of the disc spring displacement sensors, the one-way stop valve 6 is opened, the working path of the oxidant (air) reaches the air flow meter 2 through the air filter element 1 and then passes through the air compressor 3, and at the moment, the air path is divided into two paths, wherein one path reaches the voltage reactor core 39 through the pressure sensor 5 to provide the oxidant for the internal reaction of the electric reactor; the other path enters a first flow regulating valve 7, a second flow regulating valve 11, a third flow regulating valve 15, a fourth flow regulating valve 19, a fifth flow regulating valve 23 and a sixth flow regulating valve 27 through a one-way stop valve 6 according to different pressure requirements of the compensation device, and is used for inflating a first flexible inflating bag 8, a second flexible inflating bag 12, a third flexible inflating bag 16, a fourth flexible inflating bag 20, a fifth flexible inflating bag 24 and a sixth flexible inflating bag 28.
Referring to fig. 4, in the oxidant normal operation path of the compensating device, when the first pressure sensor 9/second pressure sensor 13/third pressure sensor 17/fourth pressure sensor 21/fifth pressure sensor 25/sixth pressure sensor 19 of the compensating device monitors that the pressure is greater than the maximum load pressure of the compensating device, the first quick drain valve 10/second quick drain valve 14/third quick drain valve 18/fourth quick drain valve 22/fifth quick drain valve 26/sixth quick drain valve 30 is opened to be depressurized, and when the pressure is less than the set safety value, the first quick drain valve 10/second quick drain valve 14/third quick drain valve 18/fourth quick drain valve 22/fifth quick drain valve 26/sixth quick drain valve 30 is closed.
Referring to fig. 5, the specific engineering process of this embodiment is as follows: firstly, air enters a flow meter 2 through an air filter element 1 and then flows into an air compressor 3 for pressurization, a one-way stop valve 6 which can be controlled to be opened and closed is arranged at the outlet of the air compressor 3, when an actuator 4 does not receive a displacement change signal of any one of disc spring displacement sensors 01-06, the one-way stop valve 6 is in a closed state, the air flows through a galvanic pile after passing through the outlet of the air compressor 3, and an oxidant is provided for the internal reaction of the galvanic pile;
when the inner and outer end plates of the pile deform due to thermal expansion and cold contraction, the disc spring displacement sensors 01-06 measure stroke change values of different disc springs, the first flexible air bag 8/the second flexible air bag 12/the third flexible air bag 16/the fourth flexible air bag 20/the fifth flexible air bag 24/the sixth flexible air bag 28 calculate compensation pressure required by the first flexible air bag 8/the second flexible air bag 12/the third flexible air bag 16/the fourth flexible air bag 20/the fifth flexible air bag 24/the sixth flexible air bag 28 according to the values of the disc spring displacement sensors 01-06, and when the pressure of the air compressor 3 is not enough to provide the pressure of the first flexible air bag 8/the second flexible air bag 12/the third flexible air bag 16/the fourth flexible air bag 20/the fifth flexible air bag 24/the sixth flexible air bag 28, the rotation speed of the air compressor 3 and the pressure of the first flow regulating valve 7/the second flow regulating valve 11/the third flow regulating valve 15/the fourth flow regulating valve 19/the second flow regulating valve are regulated by regulating the adjustment of the air compressor 3 The opening of the five flow control valve 24/the sixth flow control valve 27 to meet the pressure requirements of the first flexible airbag 8/the second flexible airbag 12/the third flexible airbag 16/the fourth flexible airbag 20/the fifth flexible airbag 24/the sixth flexible airbag 28; the active adjustment can well ensure the uniform distribution of the pressing force of the galvanic pile and improve the performance of the galvanic pile.
In addition, if the pressure value of a certain flexible airbag exceeds its safety threshold during the pressurization process of the first/second/third/16/20/24/28 flexible airbags, the quick exhaust valve exceeding the pressure safety threshold among the first/second/14/18/22/26/30 valves needs to be opened, and when the pressure drops to the safety threshold, the quick exhaust valve is closed to maintain the maximum pressure.
On the basis, a flow regulating valve can be added between the voltage reactor core 39 and the pressure sensor 5, and the quick exhaust valve can be communicated with an adjacent flow control valve, so that the air supplementing efficiency is improved. The displacement sensors can be replaced by mechanical sensors, and the actuator 4 can be replaced by a one-way stop valve controller.
In addition, in the present embodiment, the installation positions of the first flexible airbag 8, the second flexible airbag 12, the third flexible airbag 16, the fourth flexible airbag 20, the fifth flexible airbag 24, and the sixth flexible airbag 28 may be placed on the lower surface of the upper end plate and the upper surface of the lower end plate, and the high-rigidity elastic material may be used, so that the high-pressure gas cylinder may be additionally installed to provide pressure for the compensation device alone, and the power consumption of the compressor may be reduced. The disc spring can be replaced by other elastic materials with high sensitivity, so that the working efficiency of the compensation device is improved.
In addition, it should be noted that the flexible airbag involved in this embodiment is made of a flexible material, and can be inflated, and pressure compensation (the structure function is similar to that of an air suspension) is realized through inflation and deflation, and the shape of the flexible airbag can be manufactured according to the topological design result of the end plate; and displacement sensors, pressure sensors, etc., are not essential from the prior art, and therefore their structure and operating principle will not be elaborated upon here.
While the foregoing is directed to the preferred embodiment of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (7)
1. An adjustable fuel cell end plate packaging structure comprises a reactor core, current collecting plates tightly arranged on the upper surface and the lower surface of the reactor core, and an upper end plate and a lower end plate respectively arranged above and below the current collecting plates, and is characterized in that a first positioning insulating screw, a second positioning insulating screw and a third positioning insulating screw are respectively arranged at the left end part, the right end part and the middle position of the upper end plate and the lower end plate and are connected with each other, and the first positioning insulating screw, the second positioning insulating screw and the third positioning insulating screw are used for connecting the upper end plate and the lower end plate;
the adjustable fuel cell end plate packaging structure further comprises a compensation device, the compensation device comprises an air inlet assembly and a plurality of groups of compensation mechanisms connected with the air inlet assembly, the air inlet assembly comprises an air filter element and an air compressor connected with the air filter element, a flow meter is arranged between the air filter element and the air compressor, and an outlet of the air compressor is respectively connected with the one-way stop valve and the reactor core of the electric pile through a three-way valve; an actuator is arranged on one side of the one-way stop valve, and a pressure sensor is arranged on a pipeline between the air compressor and the reactor core of the electric pile;
the plurality of groups of compensation mechanisms comprise a first group of compensation mechanisms, a second group of compensation mechanisms and a third group of compensation mechanisms which are sequentially arranged at the upper right end position, the middle position and the left end position of the lower end plate at intervals, and a fourth group of compensation mechanisms, a fifth group of compensation mechanisms and a sixth group of compensation mechanisms which are sequentially arranged at the upper left end position, the middle position and the right end position of the upper end plate at intervals;
the compensation device also comprises a first disc spring, a second disc spring, a third disc spring, a fourth disc spring, a fifth disc spring and a sixth disc spring, wherein the first disc spring, the second disc spring and the third disc spring are respectively arranged at the right end position, the middle position and the left end position of the upper end plate, and the fourth disc spring, the fifth disc spring and the sixth disc spring are arranged at the right end position, the middle position and the left end position of the lower end plate;
the compensation device further comprises a first disc spring displacement sensor arranged on the side portion of the first disc spring, a second disc spring displacement sensor arranged on the side portion of the second disc spring, a third disc spring displacement sensor arranged on the side portion of the third disc spring, a fourth disc spring displacement sensor arranged on the side portion of the fourth disc spring, a fifth disc spring displacement sensor arranged on the side portion of the fifth disc spring, and a sixth disc spring displacement sensor arranged on the side portion of the sixth disc spring.
2. The adjustable fuel cell end plate packaging arrangement of claim 1, wherein the first set of compensation mechanisms comprises a first flow control valve, a first pressure sensor and a first quick drain valve disposed on an exterior side of the lower end plate, and a first flexible airbag disposed on an interior side of the lower end plate; the first flow regulating valve is connected with an air inlet pipeline of a first flexible air bag, and the first flexible air bag is respectively connected with a cathode air inlet of the reactor core of the electric pile, a first pressure sensor and a first quick discharge valve through a three-way valve.
3. The adjustable fuel cell end plate package of claim 1, wherein the second set of compensation mechanisms comprises a second flow control valve, a second pressure sensor, and a second quick drain valve disposed on the outside of the lower end plate, and a second flexible airbag disposed inside the lower end plate; and the second flow regulating valve is connected with an air inlet pipeline of a second flexible air bag, and the second flexible air bag is respectively connected with a cathode air inlet of the reactor core of the electric pile, a second pressure sensor and a second quick discharge valve through a three-way valve.
4. The adjustable fuel cell end plate package of claim 1, wherein the third set of compensation mechanisms comprises a third flow control valve, a third pressure sensor, and a third quick drain valve disposed on the outside of the lower end plate, and a third flexible airbag disposed inside the lower end plate; and the third flow regulating valve is connected with an air inlet pipeline of a third flexible air bag, and the third flexible air bag is respectively connected with a cathode air inlet of the reactor core of the electric pile, a third pressure sensor and a third quick discharge valve through a three-way valve.
5. The adjustable fuel cell end plate packaging arrangement of claim 1, wherein the fourth set of compensation mechanisms comprises a fourth flow control valve, a fourth pressure sensor, and a fourth quick drain valve disposed on the outside of the upper end plate, and a fourth flexible airbag disposed inside the upper end plate; and the fourth flow regulating valve is connected with an air inlet pipeline of a fourth flexible air bag, and the fourth flexible air bag is respectively connected with a cathode air inlet of the reactor core of the electric pile, a fourth pressure sensor and a fourth quick discharge valve through a three-way valve.
6. The adjustable fuel cell end plate package of claim 1, wherein the fifth set of compensation mechanisms comprises a fifth flow control valve, a fifth pressure sensor, and a fifth quick drain valve disposed on the outside of the upper end plate, and a fifth flexible airbag disposed inside the upper end plate; and the fifth flow regulating valve is connected with an air inlet pipeline of a fifth flexible air bag, and the fifth flexible air bag is respectively connected with a cathode air inlet of the reactor core of the electric pile, a fifth pressure sensor and a fifth quick discharge valve through a three-way valve.
7. The adjustable fuel cell end plate package of claim 1, wherein the sixth set of compensation mechanisms comprises a sixth flow control valve, a sixth pressure sensor, and a sixth quick drain valve disposed on the outside of the upper end plate, and a sixth flexible airbag disposed inside the upper end plate; and the sixth flow regulating valve is connected with an air inlet pipeline of a sixth flexible gas bag, and the sixth flexible gas bag is respectively connected with a cathode air inlet of the reactor core of the electric pile, a sixth pressure sensor and a sixth quick discharge valve through a three-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110496437.9A CN113224345B (en) | 2021-05-07 | 2021-05-07 | Adjustable fuel cell end plate packaging structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110496437.9A CN113224345B (en) | 2021-05-07 | 2021-05-07 | Adjustable fuel cell end plate packaging structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113224345A CN113224345A (en) | 2021-08-06 |
| CN113224345B true CN113224345B (en) | 2022-06-07 |
Family
ID=77091660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110496437.9A Active CN113224345B (en) | 2021-05-07 | 2021-05-07 | Adjustable fuel cell end plate packaging structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113224345B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113506894B (en) * | 2021-06-16 | 2022-04-19 | 福建亚南电机有限公司 | Fuel cell and control method thereof |
| CN115663255B (en) * | 2022-12-26 | 2023-03-10 | 天津中科先进技术产业有限公司 | High-strength lightweight stack end plate and fuel cell stack |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2554805Y (en) * | 2002-07-31 | 2003-06-04 | 上海神力科技有限公司 | Fuel cell stack with uniform fasteniy pressure |
| KR101209678B1 (en) * | 2009-11-25 | 2012-12-10 | 기아자동차주식회사 | Device for jointing fuel cell stack |
| DE102017215748A1 (en) * | 2017-09-07 | 2019-03-07 | Audi Ag | Compression device for a fuel cell stack |
| CN108346814B (en) * | 2018-03-11 | 2023-12-26 | 江苏氢璞创能科技有限公司 | Fastening device for fuel cell stack |
| CN208835193U (en) * | 2018-09-30 | 2019-05-07 | 北京新研创能科技有限公司 | A kind of fastening structure and fuel cell pack for fuel cell pack |
| CN110931834A (en) * | 2019-12-18 | 2020-03-27 | 新源动力股份有限公司 | Adjustable fuel cell packaging structure |
-
2021
- 2021-05-07 CN CN202110496437.9A patent/CN113224345B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113224345A (en) | 2021-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113224345B (en) | Adjustable fuel cell end plate packaging structure | |
| CN101160682B (en) | Fuel cell, method and apparatus for manufacturing fuel cell | |
| CN108258268B (en) | Control method and device for water fault of fuel cell combined electric pile system | |
| US7968241B2 (en) | Fuel cell system and method of controlling gas pressure in fuel cell system | |
| CN101755357B (en) | Fuel cell system and mobile body | |
| WO2007069010A2 (en) | Fuel cell system, moving object equipped with fuel cell system, and abnormality judgment method for fuel cell system | |
| CN114068997B (en) | High-efficiency energy-saving fuel cell stack test system | |
| US8343683B2 (en) | Fuel cell stack | |
| CN110931834A (en) | Adjustable fuel cell packaging structure | |
| JP2001093564A (en) | Fuel cell | |
| CN113690472B (en) | Fuel cell system with bipolar tail gas pressure linkage balance function | |
| US6926981B2 (en) | Fuel cell system for operation at pressures below the pressure of the surrounding environment and method of operation thereof | |
| CN110441541A (en) | A kind of expansion power generator revolving speed static test system and test method | |
| CN101120475B (en) | Fuel cell system comprising a metering unit | |
| CN116169336B (en) | Fuel cell stack and assembly pressure adjusting method and device thereof | |
| JP4338914B2 (en) | Fuel circulation fuel cell system | |
| KR101806606B1 (en) | Structure for mounting fuel cell stack | |
| CN109763914A (en) | A kind of methane autogenous pressurization system with redundancy feature | |
| JPH117975A (en) | Fastening control device for fuel cell | |
| CN110336054A (en) | Fuel cell hydrogen side pressure regulation device and battery based on pressure sensitive film | |
| CN115347223A (en) | Compensation mechanism, stacked battery packaging structure and full-working-condition packaging force control method | |
| CN217434282U (en) | Fuel cell test fixture with balanced clamping force | |
| CN219811524U (en) | Fuel cell with pressing force adjusting mechanism | |
| CN2729917Y (en) | Capacity transfer type gas differential pressure auto-regulation device | |
| CN220231935U (en) | Photovoltaic cell efficiency test auxiliary assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |