JPH0690928B2 - Catalyst pressure bonding dryer for fuel cell - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Industrial field of application) The present invention relates to a catalyst pressure-bonding drying apparatus for a fuel cell, and more particularly to a catalyst layer having a large number of electrodes with a constant thickness and an individual catalyst layer. The present invention relates to a catalyst pressure-contact drying apparatus for a fuel cell, which is suitable for pressure-bonding a catalyst layer on a plane of an electrode to a uniform thickness and drying.

(Prior Art) Generally, a fuel cell has a structure in which an electrolyte is arranged on two electrode plates formed by pressure bonding a catalyst to a thin plate containing carbon as a main component, and a plurality of these are laminated. Therefore, in order to minimize the gap between the electrode plate and the electrolyte, it is necessary to configure the electrode substrate, the catalyst layer, and the electrolyte layer as uniformly as possible.

In the prior art, as shown in FIG. 6, the element electrode 2 coated with the catalyst 1 is placed on the workbench 3 and the operator uses the metal spatula 4 whose tip is bent to make the element coated with the catalyst 1. The catalyst 1 is carefully pressed onto the elementary electrode 2 so that the catalyst 1 is pressed from above the electrode 2, and the catalyst 1 is placed in a separate dryer.
The electrode 5 that has been pressure-bonded is dried, and after drying, the electrode 5 is placed on the workbench 3 again, and the worker again pressure-bonds the catalyst 1 to the elementary electrode 2 with the metal spatula 4 and again to the dryer. The electrode 5 is dried.

(Problems to be Solved by the Invention) In the prior art, the skill and the skill of the operator are often used, and the difference in the crimping force is generated individually, and the catalyst layer formed in each electrode is formed. Has different thicknesses and the width of the pressure contact part of the metal spatula used for pressure bonding of the catalyst is narrower than the width of the electrode, and the thickness of the catalyst layer formed on the electrode plane varies as shown in Fig. 7. Was there. This has a problem that a large difference occurs between the dimension of the stack height of the laminated battery and the dimension of the design stack height.

In addition, since all the operations are manually performed by an operator, there is a problem that a very large amount of time is required in the fuel cell manufacturing process.

An object of the present invention is to solve the problems of the conventional electrode catalyst pressure-bonding drying method, to make the thickness of the catalyst layer of each electrode constant, and to form the thickness of the catalyst layer uniformly on the plane of the electrode. Another object of the present invention is to provide a catalyst pressure bonding dryer for a fuel cell, which can shorten the manufacturing process time.

[Structure of Invention]

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention has a moving table having a function of sucking and chucking a raw electrode coated with a catalyst, and a cold table for cold-pressing the catalyst to the raw electrode. In the catalyst pressure-bonding drying device, which has a hot roller and a hot roller that heats the catalyst to re-press the catalyst to the bare electrode at the same time as drying the catalyst, and a dryer that dries the electrode The cold roller, hot roller, and dryer are arranged in series on one rack that can be changed, keeping the gap between the cold roller, hot roller and moving table constant, and along the rail on the rack. It is characterized in that the element electrode coated with the catalyst is suction-chucked, and the moving table with its own drive source can move on the gantry in the order of cold roller, hot roller, and dryer.

(Function) In the catalyst pressure-bonding drying device for a fuel cell of the present invention, the gap between the moving table and the cold roller and the hot roller is always kept constant, so that the element electrode coated with the catalyst is suction-chucked. By moving the moving table under the rotation of the cold roller and the hot roller, a catalyst layer having a constant thickness and a uniform thickness can always be obtained, and a heater is provided under the rotation of the hot roller. By doing so, the catalyst can be pressed and dried at the same time. Furthermore, the electrode can be dried by moving the moving table on which the electrode is placed into the dryer.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

The element electrode coated with the catalyst in FIGS. 1 and 2 is
The moving table 6 having holes perforated is suction-chucked by the operation of the suction blower 9 connected by the hood 7 and the duct 8.

The moving table 6 is fastened on the base 10 2
It is attached to a rail 11 of the book via a linear bearing 12. A bracket 13 fastened to the lower portion of the moving table 6 is connected to a moving table driving motor 14 via a chain 15 and a sprocket 16. The moving table 6 that sucks and chucks the element electrode coated with the catalyst by driving the driving motor 14 moves under the rotation of the cold roller 17 and the hot roller 18 to move to the dryer 19
Enter and stop.

The cold roller 17 is fastened to the upper part of the gantry 10, and the clearance between the cold roller 17 and the moving table 6 is turned by turning the handle 20 and screwed into the bearing bracket 21 of the cold roller 17.
It can be set arbitrarily by turning 22. The digital indicator 23 installed at the bottom of the handle 20 detects the number of rotations of the screw rod 22 and digitally displays the numerical value of the gap A between the moving table 6 and the cold roller. indicate. The cold roller has its own drive source and is connected to the drive variable speed motor 26 via the chain 24 and the sprocket 25, and rotates at an arbitrary rotational speed.

The hot roller 18 has a gap between the moving table and the hot roller, which is fastened to the central portion of the gantry 10, and a structure for setting the gap between the cold roller and the moving table 6 is:
Since they are equivalent, they are set in the same way. Further, a heating heater 27 for heating the hot roller 18 is provided inside the hot roller 18 to raise the surface temperature of the hot roller 18 and control and manage the temperature to the optimum temperature for drying the catalyst. And, like the cold roller, it has its own drive source, is connected to the drive variable speed motor 30 via the chain 28 sprocket 29, and rotates at an arbitrary rotation speed.

The dryer 19 is fastened to the pedestal 10 and is large enough to accommodate the moving table 6 that suction-chucks the electrode 2 coated with the catalyst. The inside of the dryer 19 is surrounded by a heat insulating material 31. Is a heating heater for raising the temperature inside
32 and a stirring fan 33 to improve the temperature distribution inside
Is provided, and the temperature is controlled and controlled to the optimum temperature for drying the electrodes.

According to the above-described present invention, when the moving table 6 that suction-chucks the elementary electrode 2 coated with the catalyst 1 moves under the rotation of the cold roller 17, the gap between the cold roller 17 and the moving table 6 is displayed by the digital display 23. As shown in FIG. 3, the catalyst layer pressure-bonded to the element electrode 2 is always controlled to be constant by the element electrode 2 with a constant thickness and a uniform thickness on the plane.
The catalyst 1 can be pressure bonded. Further, under the rotation of the hot roller 18, the catalyst 1 can be pressure-bonded to the same elementary electrode 2 by the same structure as the cold roller 18, and at the same time, the hot roller 18 can be pressed.
Since the heater 18 controls the temperature at the optimum temperature for drying the catalyst 1, the catalyst can be dried optimally. Furthermore, the electrode can be optimally dried by inserting the moving table, which suction-chucks the electrode, which has been pressure-bonded, into a dryer that is controlled at an optimum temperature for drying the electrode.

As described above, the moving table 6 that sucks and chucks the raw electrode 2 coated with the catalyst 1 moves under the rotation of the cold roller 17 and the hot roller 18 and enters the dryer 19. A dried electrode having a catalyst layer having a constant thickness and a uniform thickness in a plane can be obtained in a short time.

It should be noted that the present invention is not limited to the above-mentioned embodiment, but in the embodiment, the cold roller and the hot roller were each one, but the cold roller portion shown in FIG. As described above, by stacking the plurality of auxiliary rollers 34, the deflection of the cold roller 17 can be suppressed to the minimum, and the most ideal catalyst layer can be obtained. Further, in the above-mentioned embodiment, one moving table is used for linear movement, but as shown in the plan view of FIG. 5, an endless rail 36 having a linear portion is laid on a pedestal 35 and the linear movement is performed. Part to cold roller 3
7. The process time can be further shortened by installing the hot roller 38 and the dryer 39, and disposing and moving a plurality of moving tables 40.

[Effects of the Invention] As described above, according to the present invention, the effect that the electrode manufacturing process can be greatly shortened, and in the electrode where the catalyst is pressure-bonded,
There is an effect that a catalyst layer having a constant thickness and a uniform planar thickness can be obtained, and a stack height can be calculated in a stacked battery.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of the present invention, FIG. 2 is a right side view of FIG. 1, FIG. 3 is an enlarged view of an essential part of the present invention, and FIG. 4 is another embodiment of the present invention. FIG. 5 is a plan view of another embodiment of the present invention, FIG. 6 is a perspective view for explaining the conventional technique, and FIG. 7 is a sectional view of an electrode manufactured by the conventional technique. is there. 1 ... Catalyst, 2 ... Elementary electrode 3 ... Work table, 4 ... Metal spatula 5 ... Electrode, 6 ... Moving table 7 ... Hood, 8 ... Duct 9 ... Suction blower, 10 ... Frame 11 …… Rail, 12 …… Linear bearing 13 …… Bracket 14 …… Moving table drive motor 15 …… Chain, 16 …… Sprocket 17 …… Cold roller, 18 …… Hot roller 19 …… Dryer , 20 …… Handle 21 …… Bearing bracket, 22 …… Screw rod 23 …… Digital indicator, 24 …… Chain 25 …… Sprocket 26 …… Cold roller drive motor 27 …… Heating heater, 28… … Chain 29 …… Sprocket 30 …… Hot roller drive motor 31 …… Insulation material 32 …… Heating heater 33 …… Stirring fan 34 …… Multiple auxiliary rollers 35 …… Stand, 36 …… Rail 37… … Cold roller, 38 …… Hot roller 39 ... dryer 40 ...... plurality of mobile table

Claims (4)

[Claims] 1. A moving table on which a raw electrode coated with a catalyst is placed, a cold roller for cold-pressing the catalyst to the raw electrode, and a heater for drying the catalyst and re-pressing the catalyst to the raw electrode. In a catalyst pressure-bonding dryer that has a hot roller and a dryer that dries the electrode on which the catalyst is pressure-bonded, the moving table, cold roller, and hot roller have their own drive source and variable speed can be obtained. A catalytic pressure bonding drying device for a thermoelectric battery. 2. A moving table is provided with a hood at a lower portion thereof and a hood at a lower portion thereof so as to suction-chuck an elementary electrode coated with a catalyst, and is connected to a suction blower by a duct. The catalyst pressure-bonding drying device for a fuel cell according to claim 1, characterized in that. 3. The cold roller and the hot roller are provided with a digital display so that a gap between the cold roller and the hot roller can be set arbitrarily and the numerical value of the gap can be visually checked by a digital numeral. Claim 1 to
The catalyst pressure-bonding drying device for a fuel cell according to the item. 4. A moving table in which a cold roller, a hot roller and a drier are arranged in series on one pedestal, and a suction electrode chuck of the element electrode coated with the catalyst is used as the pedestal, the cold roller and the hot roller. Claim 1 characterized in that the cold-pressing, dry-re-pressing, and electrode drying steps of the catalyst to the elementary electrode can be completed by a series of operations of moving between the two and entering the dryer. The catalyst pressure-bonding drying device for a fuel cell according to the item.