A kind of pile end plate with gas pressure buffering and moistening function
Technical field
The invention belongs to field of fuel cell technology, and in particular to a kind of end plate of fuel cell pile.
Background technique
Fuel cell is the device for converting the chemical energy of hydrogen to electric energy, its advantage is that product is water, zero-emission is without dirt
Dye, low noise, high conversion efficiency.Operating temperature can be run at low ambient temperatures, be mobile power source and base station power and fixed electricity
The first choice in source.Fuel cell is made of membrane electrode, bipolar plates, collector plate, end plate and fastener.
It is to be superimposed upon one by multiple battery units in practical applications since polymer-membrane fuel battery monolithic voltage is low
It rises and is together in series, form pile.Current fuel fuel cell system for vehicles is essentially all by fuel cell pile, increases
It is wet device, gas buffer tank, startup power supply, gas concentration unit, gas pressure and flow-control module, system control module, cold
But the BOP such as system control module and power switching module accessory and module composition.
At present fuel cell system scheme there are the shortcomings that: 1, humidifier and gas surge tank parts price are expensive, are to make
One of the main reason for high at fuel cell system cost;2, existing commercialized humidifier and gas surge tank are made
Type is peculiar poor with other accessory conformabilities, is unfavorable for miniaturization and the densification of entire fuel cell system;3, commercialized to add
One of the main reason for wet device and gas surge tank volume are big, cause fuel cell system volume big, and power density is low.It is comprehensive next
It says, since accessory is more, moulding is complicated, causes that fuel cell system volume is big, volumetric specific power density is small, limit fuel cell
Promotion and application in automobile-used field.
Summary of the invention
Goal of the invention: present invention aims in view of the deficiencies of the prior art, provide it is a kind of have the function of gas buffer with
Moistening function fuel cell pile end plate, the end plate of gas buffer surge tank and humidifier and pile is integrated, is subtracted
The volume of small fuel cell system lowers the quantity and production cost of fuel cell system BOP accessory.
Technical solution: the pile end plate of the present invention with gas pressure buffering and moistening function, including it is located at pile
The first end plate of gas feed side and the second end plate positioned at pile gas vent side, the first end plate are hollow structure,
Inner cavity is partitioned into fuel gas side air inlet buffer area and oxidant gas side air inlet buffer area two parts;The first end plate
The import of fuel gas end plate and oxidant gas end plate import are provided on back to pile side, first end plate is arranged on pile side
Have the import of fuel gas pile and oxidant gas pile import, wherein the fuel gas end plate import and oxidant gas end plate into
Mouth is located at the lower part of first end plate, and the import of fuel gas pile and oxidant gas pile import are located at part in first end plate;
The fuel gas end plate import is connected to the import of fuel gas pile by the fuel gas side air inlet buffer area, the oxidant gas
The import of body pile is connected to the import of oxidant gas end plate by oxidant gas side air inlet buffer area;
It is also respectively provided on the side wall of the fuel gas side air inlet buffer area and oxidant gas side air inlet buffer area
Fuel gas side humidification water fluid infusion and oxidant gas side humidification water fluid infusion are respectively used to buffer to fuel gas side air inlet
Humidification water is filled in area and oxidant gas side air inlet buffer area, the height of water level of two sides humidification water is respectively higher than the fuel gas
The height of end plate import and oxidant gas end plate import.
Further preferably technical solution is the present invention, along fuel gas airintake direction in the fuel gas side air inlet buffer area
It is additionally provided with several fuel gas sides air inlet buffering and adjusts ridge;In oxidant gas side air inlet buffer area along oxidant gas into
Gas direction is additionally provided with several oxidant gas side air inlet bufferings and adjusts ridge.
Preferably, second end plate is hollow structure, and the inner cavity of the second end plate is partitioned into fuel gas side
Tail gas buffer area and oxidant gas side tail gas buffer area two parts;
The second end plate face to be provided on pile side fuel gas pile outlet and oxidant gas pile export, back to
The outlet of fuel gas end plate and the outlet of oxidant gas end plate are provided on pile side, wherein fuel gas pile outlet and oxidation
The outlet of agent gas pile is located at the second end plate lower part point, and the outlet of fuel gas end plate and the outlet of oxidant gas end plate are located at second end
The upper part of plate;The fuel gas end plate outlet is exported with fuel gas pile to be connected to by the fuel gas side tail gas buffer area,
The oxidant gas pile outlet is exported with oxidant gas end plate to be connected to by oxidant gas side tail gas buffer area.
Preferably, several fuel gas are additionally provided with along fuel gas tail gas circulating direction in the fuel gas side tail gas buffer area
Tail gas buffering in side adjusts ridge;It is additionally provided in oxidant gas side tail gas buffer area along oxidant gas tail gas circulating direction
Several oxidant gas side tail gas bufferings adjust ridge.
Preferably, the first end plate is back to the outlet of coolant liquid end plate is additionally provided on pile side, and first end plate is in face of electricity
The outlet of coolant liquid pile is provided on heap side, the coolant liquid end plate outlet is connected with the outlet of coolant liquid pile, and is connected to logical
Road is isolated with the fuel gas side air inlet buffer area and oxidant gas side air inlet buffer area;
The second end backboard is to being additionally provided with coolant liquid end plate import on pile side, second end plate face on pile side to setting
Be equipped with coolant liquid pile import, the coolant liquid end plate import is connected with coolant liquid pile import, and communicating passage with it is described
Fuel gas side tail gas buffer area and oxidant gas side tail gas buffer area are isolated.
Preferably, the coolant liquid end plate outlet and the outlet of coolant liquid pile are located at the upper part of the first end plate, institute
It states the import of coolant liquid end plate and coolant liquid pile import is located at the second end plate lower part point, coolant liquid circulating direction and gas circulation side
To opposite.
Preferably, the adjusting ridge in each buffer area is to meet hydromechanical abnormity, in extending direction and each buffer area
Gas flow direction is consistent, by adjusting the angle of ridge and the humidity of shape adjustment gas flow rate and gas.
The utility model has the advantages that (1) first end plate of the invention is hollow structure, be internally divided into fuel gas side air inlet buffer area and
Oxidant gas side air inlet buffer area two parts, fuel gas and oxidant gas pass through end plate import into respective buffer area respectively
Interior, no setting is required surge tank can buffer gas;Two buffer areas are provided with humidification water fluid infusion in the present invention simultaneously
Mouthful, there is the humidification water of certain height of water level in two buffer areas, gas carries out bubble type humidification by waters, and gas humidification is complete
Enter gas buffer region stabilizing gas pressure at rear, the gas containing vapor enters pile, and since inlet gas buffers
The volume in area can make the increase of gas flow much larger than volume at pile gas access, to change the humidity of gas, make into
The gas humidity for entering pile is met the requirements;End plate of the present invention has the function of gas buffer and moistening function, passes through setting for buffer area
Water temperature is counted and humidified to adjust and change the gas humidity into pile, the performance for being conducive to pile, which plays, and the service life extends makes
Pile runs more stable, longer life expectancy;The present invention can make fuel cell system more compact, smallerization, can more improve system
Volumetric power density, reduce the volume of fuel cell system, lower the quantity of fuel cell system BOP accessory and be produced into
This, accelerates the market-oriented step of fuel cell articles;
(2) the second end plate of the invention uses the structure similar with first end plate, is convenient for modular production first,
Secondary, unreacted gas enters exit gas buffer area by pile outlet during the work time, and pile moment is discharged in tail gas,
Due to volume variation and lead to the variation of mixture pressure, so that gas is become supersaturated gas, liquid water is precipitated, and reaches gas
The effect of liquid separation, reduces the water content of tail gas, improves subsequent gas-liquid separation effect;And exit gas buffer area is more
The volume for mending gas feed buffer area is insufficient, and front and back gas buffer region can be avoided when fuel cell system works because of solenoid valve
Drainage exhaust and caused by pile air pressure inside it is unstable, influence performance and the service life of pile, can by the design of two sides buffer area
So that pile air pressure fluctuation within 2kpa, makes pile run more stable, longer life expectancy.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of first end plate of the present invention;
Fig. 2 is the cross-sectional view of first end plate of the present invention;
Fig. 3 is the structural schematic diagram of the second end plate of the present invention;
Fig. 4 is the cross-sectional view of the second end plate of the present invention;
In figure, 1- fuel gas end plate import;2- oxidant gas end plate import;3- fuel gas side humidification water fluid infusion;4-
Oxidant gas side humidification water fluid infusion;The outlet of 5- coolant liquid end plate;6- fuel gas pile import;The outlet of 7- coolant liquid pile;
8- oxidant gas pile import;9- fuel gas side air inlet buffer area;10- oxidant gas side air inlet buffer area;11- fuel gas
Air inlet buffering in side adjusts ridge;12- oxidant gas side air inlet buffering adjusts ridge;13- oxidant gas side tail gas buffer area;14- combustion
Expect gas side tail gas buffer area;15- coolant liquid pile import;The outlet of 16- fuel gas pile;The outlet of 17- oxidant gas pile;
18- fuel gas side tail gas buffering adjusts ridge;19- oxidant gas side tail gas buffering adjusts ridge;The outlet of 20- fuel gas end plate;21-
The outlet of oxidant gas end plate;22- coolant liquid end plate import.
Specific embodiment
Technical solution of the present invention is described in detail below by attached drawing, but protection scope of the present invention is not limited to
The embodiment.
Embodiment: a kind of pile end plate with gas pressure buffering and moistening function, including it is located at pile gas feed
The first end plate of side and the second end plate positioned at pile gas vent side.First end plate and the second end plate are hollow structure.
The first end plate inner cavity is partitioned into fuel gas side air inlet buffer area 9 and oxidant gas side air inlet buffering
10 two parts of area.The inner cavity of second end plate is partitioned into fuel gas side tail gas buffer area 14 and oxidant gas side tail gas is slow
Rush 13 two parts of area.It is respectively arranged with air inlet buffering in fuel gas side in each buffer area and adjusts ridge 11, oxidant gas side air inlet buffering
Adjust ridge 12, tail gas buffering in fuel gas side adjusts ridge 18 and oxidant gas side tail gas buffering adjusts ridge 19.Respectively adjusting ridge is
Meet hydromechanical abnormity, extending direction is consistent with gas flow direction in each buffer area, by the angle and shape that adjust ridge
The humidity of shape regulating gas flow velocity and gas.
The first end plate is back to being provided with fuel gas end plate import 1, oxidant gas end plate import 2, cold on pile side
But liquid end plate outlet 5, fuel gas side humidification water fluid infusion 3 and oxidant gas side humidification water fluid infusion 4.First end plate is in face of electricity
Fuel gas pile import 6, oxidant gas pile import 8 and coolant liquid pile outlet 7 are provided on heap side.Fuel gas end plate into
Mouth 1 is connected to fuel gas pile import 6 by the fuel gas side air inlet buffer area 9,8 He of oxidant gas pile import
Oxidant gas end plate import 2 is connected to by oxidant gas side air inlet buffer area 10;Coolant liquid end plate outlet 5 and coolant liquid electricity
Heap outlet 7 is connected, and communicating passage and 10 phase of the fuel gas side air inlet buffer area 9 and oxidant gas side air inlet buffer area
Isolation.Fuel gas side humidification water fluid infusion 3 and oxidant gas side humidification water fluid infusion 4 are respectively used to the fuel gas side
Humidification water is filled in air inlet buffer area 9 and oxidant gas side air inlet buffer area 10, the height of water level of two sides humidification water is high respectively
In the height of the fuel gas end plate import 1 and oxidant gas end plate import 2.
The second end plate face exports 16, oxidant gas pile outlet, 17 and to fuel gas pile is provided on pile side
Coolant liquid pile import 15.To being provided on pile side, fuel gas end plate outlet 20, oxidant gas end plate goes out second end backboard
Mouth 21 and coolant liquid end plate import 22.The fuel gas end plate outlet 20 and fuel gas pile outlet 16 pass through the fuel gas side
Tail gas buffer area 14 is connected to, and the oxidant gas pile outlet 17 and oxidant gas end plate outlet 21 pass through oxidant gas
Side tail gas buffer area 13 is connected to.Coolant liquid end plate import 22 is connected with coolant liquid pile import 15, and communicating passage with it is described
Fuel gas side tail gas buffer area 14 and oxidant gas side tail gas buffer area 13 are isolated.
Fuel gas end plate import 1 and oxidant gas end plate import 2 are located at the lower part of first end plate, fuel gas pile into
Mouth 6, oxidant gas pile import 8, coolant liquid end plate outlet 5 and coolant liquid pile outlet 7 are located at part in first end plate;Institute
State fuel gas pile outlet 16, oxidant gas pile outlet 17, coolant liquid end plate import 22 and coolant liquid pile import 15
In the second end plate lower part point, fuel gas end plate outlet 20 and oxidant gas end plate export the 21 upper parts for being located at the second end plate,
Coolant liquid circulating direction is opposite with gas circulating direction.
As described above, must not be explained although the present invention has been indicated and described referring to specific preferred embodiment
For the limitation to invention itself.It without prejudice to the spirit and scope of the invention as defined in the appended claims, can be right
Various changes can be made in the form and details for it.