KR102599068B1 - Welding device of metal bipolar plate - Google Patents

Abstract

The present invention relates to a welding device for a fuel cell stack separator plate, comprising: a separator plate alignment jig for aligning welding objects transferred to a laser welding process through a series of automated processes and maintaining a joined state; and a clamping means positioned at the upper and lower sides of the welded object aligned with the separator plate alignment jig to exert a fixing force on the welded object.

Description

Welding device for fuel cell stack separator plate {WELDING DEVICE OF METAL BIPOLAR PLATE}

The present invention relates to a welding device for a fuel cell stack separator, and more specifically, to a fuel cell stack separator for clamping the separators to prevent gaps between the separators in equipment for welding the separator plates of a fuel cell stack. It relates to welding equipment.

In general, a fuel cell stack is a type of power generation device that converts the chemical energy of fuel into electrical energy by electrochemically reacting within the stack. It not only supplies driving power for industrial, household, and vehicle applications, but also supplies small electronics such as portable devices. It can be used to supply power to products, and its use area is gradually expanding as a highly efficient clean energy source.

A typical fuel cell stack consists of multiple cells stacked in series between end plates at both ends of the stack. At this time, each cell has a membrane-electrode assembly (MEA: Membrane-Electrode Assembly) located at the innermost part. This membrane-electrode assembly consists of a polymer electrolyte membrane that can move hydrogen cations (protons), and a polymer electrolyte membrane on both sides of the polymer electrolyte membrane. It consists of a catalyst layer applied so that hydrogen and oxygen can react, that is, a cathode and an anode.

In addition, a gas diffusion layer (GDL) is laminated on one side and the other side of the membrane electrode assembly, that is, the outer portion where the air electrode and the fuel electrode are located, and the reaction gas is supplied to the outer surface of the gas diffusion layer and the coolant generated by the reaction is A separator plate that discharges is located.

The separator plate is divided into an anode separator plate and a cathode separator plate. The anode separator plate and the cathode separator plate that make up adjacent cells are in contact with each other and form a pair to form a fuel cell stack. Here, the anode separator may be in the form of a separator in which a channel portion is formed, and the cathode separator may be in the form of a porous plate.

In the process of manufacturing such a separator, a gasket is sealed between the cathode separator and the anode separator to ensure airtightness between the hydrogen, air, and coolant flow paths. After laser welding, it is hardened at high temperature.

However, according to the jig device configured to supply and clamp the separator plate in the conventional joint equipment for fuel cell stack separator plates, the perforated plate, cathode separator plate, and anode separator plate, which are the objects to be welded, are provided as independent parts, so laser welding is possible. There was a problem in that precise alignment was not easy because it was difficult to accurately align them in the alignment jig.

In addition, if a minute gap occurs between each separator, laser welding will not be performed properly. In particular, a gap may physically occur between the cathode separator and anode separator due to the thickness of the gasket attached between the separators. It consists of a structure that does not exist outside of the existing structure, and as a result, there was a problem of welding defects occurring.

Republic of Korea Patent Publication No. 0957366 (2010.05.03)

Therefore, the present invention was made to solve the above problems, and the purpose of the present invention is to clamp the fuel separator plates so that a gap does not occur between the separator plates in equipment for welding the separator plates of a fuel cell stack. The object is to provide a welding device for a battery stack separator plate.

In order to achieve the above object, the present invention includes a separator plate alignment jig for aligning welding objects transferred to a laser welding process through a series of automated processes and maintaining the combined state; and a clamping means positioned at the upper and lower sides of the welded object aligned with the separator plate alignment jig to exert a fixing force on the welded object.

According to an embodiment of the present invention, the clamping means includes: an upper plate; An elastic member coupled to the upper plate and installed to be elastically movable in the vertical direction; and an upper support means including a pressing member coupled to the elastic member, supported on a welding portion of the welding object, and having a 'T' shaped extension plate extending in three directions.

According to an embodiment of the present invention, the extension plate is provided with an extension portion that extends outward from one side of the plane beyond the edge of the top plate and has a 'ㄷ'-shaped groove at a position corresponding to the welded portion.

According to an embodiment of the present invention, the clamping means includes a lower supporting means installed at the lower part of the welding object corresponding to the upper supporting means, the welding object is a cathode separator plate and a perforated plate, and the lower supporting means is , and includes a magnetic pin that penetrates the separator plate alignment jig to press and support the perforated plate from below and at the same time magnetically attracts the perforated plate and the cathode separator plate.

According to an embodiment of the present invention, the separating plate alignment jig is formed in an inclined direction with respect to the longitudinal direction and is a jig having a plurality of porous plate alignment grooves formed on the outer surface to align the porous plate by an alignment unit. It includes a plate, and a pin through hole is integrally formed in the perforated plate alignment groove so that the magnetic pin of the lower support means can move upward through the jig plate.

According to an embodiment of the present invention, the clamping means includes a lower supporting means installed at the lower part of the welding object corresponding to the upper supporting means, and the welding object is a perforated plate-cathode separator plate and an anode separator plate, The lower support means includes a protruding member that protrudes and supports corresponding to the groove of the perforated plate-cathode separator plate at a position corresponding to the pressing member on the separator plate alignment jig.

According to an embodiment of the present invention, the welding device includes a first welding portion that welds the cathode separator plate and the porous plate to form a porous plate-cathode separator plate; and a second welding part that welds the perforated plate-cathode separator plate and the anode separator plate to form a separator set, and is arranged to move back and forth between the first welding part and the second welding part, and separates the cathode from the cartridge. A first transfer module that transfers the plate and the perforated plate to the first welding zone; And a second transfer module that transfers the anode separator plate from the cartridge to the second welding portion and transfers the perforated plate-cathode separator plate welded in the first welding portion onto the anode separator plate of the second welding portion. It includes a transfer device that includes.

According to the welding device for a fuel cell stack separator according to the present invention having the above-described configuration, when welding the separator plates of a fuel cell stack, the separator plates are formed to prevent a gap between the separator plates by taking into account the position of the welded portion. By clamping, there is an effect of preventing welding defects by performing precise and accurate laser welding work.

1 is a perspective view showing a welding facility for a fuel cell stack separator plate according to the present invention.
Figure 2 is a diagram schematically showing a separator set formed by sequentially combining a perforated plate, a cathode separator plate, and an anode separator plate according to the present invention.
Figure 3 is a perspective view showing the first separator plate alignment jig of the perforated plate and cathode separator plate according to the present invention.
Figure 4 is a perspective view showing a jig device for welding equipment for a perforated plate and a cathode separator plate according to the present invention.
Figure 5 is a perspective view showing the upper support means of the first welded portion according to the present invention.
Figure 6 is a perspective view showing the lower support means of the first welded portion according to the present invention.
Figure 7 is a perspective view showing the second separator plate alignment jig of the perforated plate-cathode separator plate and anode separator plate according to the present invention.
Figure 8 is a perspective view showing the upper support means of the second welded portion according to the present invention.
Figure 9 is a perspective view showing the jig device of the welding equipment for the perforated plate-cathode separator plate and anode separator plate according to the present invention.

Since the present invention can be subject to various changes and can have various forms, embodiments will be described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components.

The above terms are used only for the purpose of distinguishing one component from another. The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a perspective view showing a welding facility for a fuel cell stack separator plate according to the present invention, and Figure 2 is a separator formed by sequentially combining a perforated plate, a cathode separator plate 12, and an anode separator plate 20 according to the present invention. It is a drawing schematically showing a plate set, Figure 3 is a perspective view showing the first separator plate alignment jig of the perforated plate and cathode separator plate 12 according to the present invention, and Figure 4 is a perforated plate and cathode separator plate according to the present invention. It is a perspective view showing the jig device of the welding equipment of (12), Figure 5 is a perspective view showing the upper support means of the first welded part according to the present invention, and Figure 6 is a perspective view showing the lower supporting means of the first welded part according to the present invention. 7 is a perspective view showing the second separation plate alignment jig of the perforated plate-cathode separation plate and anode separation plate according to the present invention, and Figure 8 is a perspective view showing the upper support means of the second welded portion according to the present invention, Figure 9 is a perspective view showing the jig device of the welding equipment for the perforated plate-cathode separator plate and anode separator plate according to the present invention.

As shown in Figure 1, according to an embodiment of the present invention, the welding equipment for the fuel cell stack separator plate is provided with a perforated plate 11 and a cathode separator plate 12, and the porous plate 11 and the cathode separator plate ( 12) is welded to form the porous plate-cathode separator 10, and the porous plate-cathode separator 10 and the anode separator 20 are welded to form a separator set 30. It includes a second welded portion 200 forming a .

In the first and second welding parts 100 and 200, the separating plate welding parts 110 and 210, which move along the transfer device and perform welding of the separating plate, and the porous plate 11 and the cathode separating plate 12 are seated and aligned, and are separated. A first separator plate alignment jig 300 that supports the porous plate 11 and the cathode separator plate 12 so that welding can be performed stably by the plate welding portion 110, and the porous plate 11 and the cathode separator plate. The porous plate-cathode separator plate (10) and the anode separator plate (20) welded together (12) are seated and aligned, and the porous plate-cathode separator plate is connected so that welding can be performed stably by the separator plate welding portion (210). It includes (10) and a second separator plate alignment jig (400) supporting the anode separator plate (20).

Following a series of automated processes, the porous plate 11, the cathode separator plate 12, and the anode separator plate 20, which are the objects to be welded, are stored in a cartridge in a welding facility and are moved to the first and second welding zones 100 and 200. It is inputted and individually transferred to the first and second separator plate alignment jigs (300,400).

The cathode separator 12 is a separator plate coupled to the cathode side of the membrane electrode assembly (MEA) in the fuel cell stack, and can be formed of a metal material with excellent electrical and thermal conductivity characteristics, such as stainless steel, titanium alloy, It may be formed of a material selected from aluminum alloy, and nickel alloy, and stainless steel may be advantageous. A coating layer of transition metal or carbon material is formed on the surface of the cathode separator 12 to improve corrosion resistance and electrical conductivity. At this time, a discontinuous coating layer made of nanoparticles containing at least one of gold, platinum, ruthenium, and iridium is formed on the surface of the cathode separator 12, and an oxide film is formed in the portion where the discontinuous coating layer is not formed. can do. A flow path (not shown) through which the reaction gas (air) flows is formed on the reaction surface of the cathode separator plate 12. The perforated plate 11 is integrally bonded to the reaction surface of the cathode separator plate 12.

The perforated plate 11 improves the reactivity of the reaction gas, is made of a metal material, and is formed in a mesh shape with a plurality of holes. The perforated plate 11 may be formed of the same or similar material as the cathode separator plate 12.

The anode separator 20 corresponds to a separator disposed on the anode side of the membrane electrode assembly in the fuel cell stack. A flow path (not shown) through which the reaction gas (hydrogen) flows is formed on the reaction surface of the anode separator 20. The surface opposite to the reaction surface of the perforated plate-cathode separator 10 and the reaction surface of the anode separator 20 becomes a joint surface where the perforated plate-cathode separator 10 and the anode separator 20 are joined. .

According to an embodiment of the present invention, in a welding facility, the first welding portion 100 is provided with a perforated plate 11 and a cathode separation plate 12 from a cartridge.

In the first welding portion 100, the porous plate 11 and the cathode separator plate 12, which are welding objects, are stacked in that order and welding is performed while being fixed in the first separator plate alignment jig 300.

The perforated plate 11 is seated and aligned on the first separator plate alignment jig 300 of the first welded portion 100, and then the cathode separator plate 12 is aligned and positioned on the first separator plate alignment jig 300. It is seated and aligned on the perforated plate 11.

In this way, the perforated plate 11 and the cathode separator plate 12 are aligned with each other on the first separator plate alignment jig 300 of the first welded portion 100 to maintain a coupled state, and the separator plate welded portion 110 Welding is performed. Here, the porous plate 11 and the cathode separator plate 12 are welded to form the porous plate-cathode separator plate 10.

In a state in which the porous plate 11 and the cathode separator plate 12 are welded in the first welded portion 100, the porous plate-cathode separator plate 10 is transferred to the second welded portion 200, and the second welded portion 200 ) The porous plate-cathode separator plate 10 in a welded state is seated and aligned in the second separator alignment jig 400, and then the anode separator plate 20 taken out from the cartridge is used to separate the porous plate and cathode. It is seated and aligned on the plate 10.

In this way, the perforated plate-cathode separator plate 10 and the anode separator plate 20 are aligned and maintained on the second separator plate alignment jig 400 of the second welded portion 200, and the separator plate welded portion ( 210) performs welding. Here, the perforated plate-cathode separator plate 10 and the anode separator plate 20 are welded to form the separator set 30.

The perforated plate 11 and the cathode separator plate 12, which are welded objects located in the cartridge, in the first welded portion 100, and the anode separator 20, which is the welded object located in the cartridge, are respectively connected to each other in the first welded portion 100. A transfer device (not shown) is provided for transferring to the first and second separator plate alignment jigs 300 and 400, and the transfer device provides each perforated plate 11, cathode separator plate 12, and anode separator plate 20. The transfer operation is performed on the first and second separator plate alignment jigs (300, 400) through an automated continuous process.

The transfer device (not shown) is arranged to reciprocate between the first welded portion 100 and the second welded portion 200, and moves the perforated plate 11 and the cathode separator plate 12 from the cartridge to the first welded portion 100. The anode separator 20 is transferred from the first transfer module (not shown) and the cartridge to the first separator alignment jig 300, and the welding is completed in the first weld part 100. It includes a second transfer module (not shown) that transfers the perforated plate-cathode separator plate 10 onto the anode separator plate 20 of the second welding portion 200.

In this way, the separator set 30 that has been welded at the separator welded portion 210 of the second welded portion 200 is inspected for appearance, alignment, etc. through the following inspection process to prevent defects in the separator set 30. It becomes possible to discern.

According to an embodiment of the present invention, before supplying the porous plate 11 and the cathode separator plate 12, which are welding objects, through the separator plate welding portion 110 from the first welding portion 100 to the welding process, the porous plate ( 11) and the cathode separator plate 12 are placed in the first separator plate alignment jig 300 to maintain accurate alignment of the perforated plate 11 and the cathode separator plate 12 to prevent welding defects.

As shown in FIG. 3, the porous plate 11 and the cathode separator plate 12 transferred by a transfer device are sequentially stacked on the first separator plate alignment jig 300. At this time, the porous plate 11 forms the bottom layer of the first separator plate alignment jig 300, and the cathode separator plate 12 can be sequentially stacked on the porous plate 11.

The first separator plate alignment jig 300 includes a jig plate 310 and an alignment unit 320.

Referring to the drawings, the jig plate 310 is provided with a porous plate seating groove 311 for seating the porous plate 11. The porous plate seating groove 311 is provided in the shape of a concave groove for seating the porous plate 11 in the center of the jig plate 310. The perforated plate seating groove 311 may have substantially the same area as the perforated plate 11, and its thickness may be the same as that of the perforated plate 11 or may be designed to have a lower height than the thickness of the perforated plate 11. . In particular, the perforated plate 11 preferably has an area corresponding to the channel area of the cathode separator plate 12.

This first separator plate alignment jig 300 may be made of metal, and it is preferable to use SUS among metal materials.

In addition, the jig plate 310 is formed with a cathode seating groove 312 that is formed to be stepped from the perforated plate seating groove 311. The cathode seating groove 312 shares the entire porous plate seating groove 311, is formed with a larger area than the porous plate seating groove 311, and allows the porous plate 11 and the cathode separator plate 12 to be stacked. It is preferable that it is formed to be stepped from the stencil plate seating groove 311.

A plurality of porous plate alignment grooves 313 are formed on the jig plate 310 on the outer surface so that the porous plate 11 can be aligned as the tip of the first alignment member 321, which will be described later, enters or exits.

In addition, cathode alignment holes 314 are formed at both ends of the jig plate 310 through which a third alignment member 323, described later, can be inserted to align the cathode separator plate 12 in the front-back direction.

The alignment unit 320 includes a first alignment member 321 for aligning the porous plate 11 within the porous plate seating groove 311, and a first alignment member 321 for aligning the cathode separator plate 12 within the cathode seating groove 312. Includes second and third alignment members 322 and 323.

The first alignment member 321 presses the side of the porous plate 11 as its tip enters or exits the porous plate alignment groove 313 formed in an inclined direction with respect to the longitudinal direction of the jig plate 310, thereby pressing the porous plate ( 11) is seated in an aligned state in the perforated plate seating groove 311.

In particular, on the inside of the perforated plate alignment groove 313, the magnet pin 521 of the lower support means 520, which will be described later, passes through the first separator plate alignment jig 300 and has a pin through hole ( 315) is formed as one piece.

The second alignment member 322 enters or exits in a direction intersecting the jig plate 310 and presses the side of the cathode separator 12 so that the cathode separator 12 can be aligned on the jig plate 310. Let it happen.

The third alignment member 323 protrudes vertically from below the cathode alignment hole 314 of the jig plate 310 and presses both ends of the cathode separator plate 12, thereby forming the cathode seating groove 312 of the jig plate 310. ) Ensure that the cathode separator plates 12 stacked on top are aligned.

The first separator plate alignment jig 300 configured as described above inserts the porous plate 11 into the porous plate seating groove 311, stacks the cathode separator plate 12 on the porous plate 11, and inserts the porous plate 11 into the porous plate seating groove 312. After stacking, the perforated plate 11 and the cathode separator plate 12 are aligned to the correct position of the jig plate 310 of the first separator plate alignment jig 300 using a plurality of alignment units 320. The alignment for welding can be satisfied.

In this way, before performing the welding process between the porous plate 11 and the cathode separator plate 12 aligned with the first separator plate alignment jig 300, a gap is created between the porous plate 11 and the cathode separator plate 12. A clamping means 500 is provided to exert a fixing force by pressing the perforated plate 11 and the cathode separator plate 12 in the vertical direction to prevent damage.

The clamping means 500 is located above the first separator plate alignment jig 300 and includes an upper support means 510 that presses the cathode separator plate 12 from above to downward, and a lower part of the first separator plate alignment jig 300. It includes a lower support means 520 that is located and penetrates the jig plate 310 and presses the perforated plate 11 from downward to upward.

As shown in Figure 5, the upper support means 510 of the first welded portion 100 according to the present invention is pressed against the upper surface of the cathode separator plate 12, for example, the surface opposite to the reaction surface of the cathode separator plate 12. pressure is applied.

The upper support means 510 includes an upper plate 512 and an elastic member 513 coupled to the upper plate 512 and elastically installed to be movable in the vertical direction; And a pressing member 511 coupled to the elastic member 513, supported on the welded portion of the cathode separator plate 12, which is the object to be welded, and having a 'T' shaped extension plate 511a extending in three directions. do.

The pressing member 511 is provided with, for example, a 'T'-shaped extension plate 511a extending in three directions, and an elastic member 513 is provided between each extension plate 511a and the upper plate 512, so that the upper plate ( 512), the extension plate 511a can move elastically in the up and down directions to adjust the pressing force on the cathode separator plate 12.

In the extension plate 511a, an extension portion 514 extending outward from one side of the plane beyond the edge of the upper plate 512 and having a 'ㄷ' shaped groove 515 is installed at a position corresponding to the welded portion.

The pressing member 511 is installed at a position corresponding to the welding area and can exert an elastic pressing force on the cathode separator plate 12. As a result, the entire surface of the cathode separator plate 12 can be pressed using a three-point pressing method.

Referring to the drawing, the elastic member 513 provides elastic force to the pressing member 511 so that the pressing member 511 can simultaneously press four pressing positions on the cathode separator plate 12. Because of this, the pressing member 511 maintains a uniform elastic load on the cathode separator plate 12, so that a gap does not occur at the welded area between the cathode separator plate 12 and the porous plate 11.

Accordingly, clamping of the welded portions of the cathode separator plate 12 and the porous plate 11 is possible at once, allowing precise and accurate laser welding work to be performed.

In addition, as shown in FIG. 6, the lower support means 520 penetrates the first separator plate alignment jig and supports the porous plate 11 by pressing it from below, while simultaneously supporting the porous plate 11 and the cathode separator plate 12. ) includes a magnetic pin 521 that attracts the magnet with magnetic force.

In addition, the lower support means 520 is provided with a driving cylinder 524 for adjusting the position of the support 523 on which the magnet pin 521 is installed on one side of the magnet pin 521, and the magnet pin 521 and the support body An elastic member 522 is installed between 523 and allows the magnet pin 521 to move up and down flexibly.

The magnet of the magnetic pin (521) is a neodymium magnet that exerts the relatively strongest magnetic force among permanent magnets and exerts approximately 2500 to 5000 Gauss, and can be used at high temperatures of up to approximately 60°C, with a maximum magnetic force of 200°C. It can be manufactured as a high temperature magnet of ℃. The shape of the magnetic pin 521 can be changed in various ways, but it is important that it can be applied as a pin shape with a predetermined length.

In this way, with the perforated plate 11 and the cathode separator plate 12 aligned on the first separator plate alignment jig 300, the laser irradiated from the separator plate welding portion 110 is directed to the extension portion of the upper support means 510 ( Welding is performed while passing through the groove 515 of 514).

This welding may be laser welding in which the porous plate 11 and the cathode separator plate 12 are joined while low melting point molten material is melted on the welded surface of the porous plate 11 and the cathode separator plate 12. When applied to the separator plate of a thin-plate fuel cell stack, laser welding can minimize the amount of deformation due to less heat input than other welding. It is used for fluid sealing purposes, and laser welding in the reaction area improves adhesion and reduces internal contact resistance. It has a reducing effect.

In this way, a pressing force is exerted on the cathode separator plate 12 and the porous plate 11 from the upper and lower parts, respectively, and the elastic force is applied uniformly to the entire surface of the cathode separator plate 12 through the upper support means 510. By providing an elastic load and pressing the porous plate 11 through the lower support means 520 and pulling the joint surface of the cathode separator plate 12 and the joint surface of the porous plate 11 using magnetic force, the cathode By preventing the occurrence of minute gaps between the separator plate 12 and the porous plate 11, laser welding can be performed easily and accurately.

According to an embodiment of the present invention, before supplying the porous plate-cathode separator plate 10 and the anode separator plate 20, which are welding objects, through the separator welding portion 210 in the second welding portion 200 to the welding process. , a second part for maintaining the correct alignment of the perforated plate-cathode separator plate 10 and the anode separator plate 20 to prevent welding defects between the perforated plate-cathode separator plate 10 and the anode separator plate 20. Insert into the separator plate alignment jig (400).

As shown in FIG. 7, the porous plate-cathode separator plate 10 and the anode separator plate 20, which are transferred by a transfer device, are sequentially stacked on the second separator plate alignment jig 400.

The second separator plate alignment jig 400 includes a jig plate 410 and an alignment unit 420.

Referring to the drawing, the jig plate 410 is provided with a separator mounting groove 411 for seating the perforated plate-cathode separator 10 and the anode separator 20.

The separator plate seating groove 411 roughly corresponds to the entire surface of the jig plate 410 and is formed in the shape of a concave groove. The separator plate seating groove 411 may have substantially the same area as the perforated plate-cathode separator 10 and the anode separator 20.

Like the first separator plate alignment jig 300, the second separator plate alignment jig 400 may be made of a metal material.

The jig plate 410 has a plurality of separator alignment grooves on the outer surface to align the perforated plate-cathode separator 10 and the anode separator 20 as the tip of the fourth alignment member 421 enters or exits. (412) is formed.

In addition, a fifth alignment member 422, which will be described later, is inserted through both ends of the jig plate 410 to form a separator plate that allows the porous plate-cathode separator 10 and the anode separator 20 to be aligned in the front and rear directions. An alignment hole 413 is formed.

The alignment unit 420 includes a fourth alignment member 421 for aligning the porous plate-cathode separator plate 10 and the anode separator plate 20 within the separator seating groove 411 by pressing the sides, and the porous plate-cathode separator 10 and the anode separator 20. It includes a fifth alignment member 422 for pressing the front and rear surfaces of the cathode separator plate 10 and the anode separator plate 20 to align them within the separator plate seating groove 411.

The fourth alignment member has its tip entering or exiting the separator alignment groove 412 formed in a direction crossing the longitudinal direction of the jig plate 410, thereby forming the porous plate-cathode separator 10 and the anode separator 20. By pressing the sides, the perforated plate-cathode separator plate 10 and the anode separator plate 20 are aligned and seated in the separator mounting groove 411.

The fifth alignment member protrudes vertically from below into the separator plate alignment hole 413 of the jig plate 410 and presses both ends of the perforated plate-cathode separator plate 10 and the anode separator plate 20 to form the jig plate 410. ) so that the perforated plate-cathode separator plate (10) and anode separator plate (20) stacked on the separator seating groove 411 are aligned.

The second separator plate alignment jig 400 configured in this way inserts the perforated plate-cathode separator plate 10 into the separator plate seating groove 411 and places the anode separator plate 20 on the perforated plate-cathode separator plate 10. After stacking, the perforated plate-cathode separator plate 10 and the anode separator plate 20 are aligned to the correct position of the jig plate 410 using a plurality of alignment units 420, thereby providing alignment for welding. can satisfy.

In this way, before performing the welding process on the perforated plate-cathode separator plate 10 and the anode separator plate 20 aligned with the second separator plate alignment jig 400, the perforated plate-cathode separator plate 10 and the anode are separated. An upper support means 610 is provided to press the anode separator plate 20 from above to prevent a gap between the plates 20, and a pressing member 511 is provided on the second separator plate alignment jig 400. A lower support means 620 consisting of a protruding member 621 that protrudes and is supported corresponding to a groove (not shown) formed on the bottom surface of the perforated plate-cathode separator plate 10 is provided at the position.

As shown in FIG. 6, the upper support means 610 has an elastic member 613 attached to the pressing member 611 so that the pressing member 611 can simultaneously press six pressing positions on the anode separator plate 20. It provides elasticity. Because of this, the pressing member 611 maintains a uniform elastic load on the anode separator plate 20, so that a gap does not occur at the welded area between the anode separator plate 20 and the porous plate-cathode separator plate 10. It won't happen.

Therefore, clamping of the welded portions of the anode separator 20 and the porous plate-cathode separator 10 is possible at once, allowing precise and accurate laser welding work to be performed.

As shown in FIG. 8, the lower support means 620 is supported by being inserted into a plurality of grooves (not shown) formed on the bottom surface of the perforated plate-cathode separation plate 10. Therefore, prior to aligning the perforated plate-cathode separator plate 10 through the alignment unit 420, the alignment unit 420 is installed with the perforated plate-cathode separator plate 10 inserted into the lower support means 620. It is possible to align it with the separator plate seating groove 411.

In this way, the perforated plate-cathode separator plate 10 and the anode separator plate 20 are aligned on the second separator plate alignment jig 400 and are uniformly attached to each other, and the separator plate welded portion 210 of the second welded portion 200 is formed. ) Laser welding is performed while passing through the groove 615 of the extension 614 of the upper support means 610.

Therefore, in the present invention, when welding the separator plate of a fuel cell stack, the separator plate 10 is provided to prevent a gap between the perforated plate-cathode separator plate 10 and the anode separator plate 20 by considering the position of the welded portion. By clamping by pressing ,20) from the top and bottom, it is possible to prevent welding defects by performing precise and accurate welding work.

The above description of the present invention is for illustrative purposes, and those skilled in the art will understand that the present invention can be easily modified into other specific forms without changing the technical idea or essential features of the present invention. will be. Therefore, the embodiments described above should be understood in all respects as illustrative and not restrictive. The scope of the present invention is indicated by the patent claims described below, and all changes or modified forms derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present invention.

10: Perforated plate-cathode separation plate 11: Perforated plate
12: cathode separator 20: anode separator
30: Separator plate set
100: first weld portion 110: separator plate weld portion
200: second weld portion 210: separator plate weld portion
300: First separation plate alignment jig 310: Jig plate
311: Perforated plate seating groove 312: Cathode seating groove
313: Perforated plate alignment groove 314: Cathode alignment groove
315: Pin through hole 320: Alignment unit
321: first alignment member 322: second alignment member
323: Third alignment member 400: Second separation plate alignment jig
410: Jig plate 411: Separator plate seating groove
412: Separator plate alignment groove 413: Separator plate alignment hole
420: Alignment unit 421: Fourth alignment member
422: Fifth alignment member 500: Clamping means
510: upper support means 511: pressing member
511a: Extension plate 512: Top plate
513: elastic member 514: extension part
515: groove 520: lower support means
521: Magnet pin 522: Elastic member
523: Support 524: Driving cylinder
610: upper support means 611: pressing member
613: elastic member 620: lower support means
621: Protrusion member

Claims (7)

A separator plate alignment jig for aligning the welded objects transferred to the laser welding process through a series of automated processes and maintaining the combined state; and
It includes clamping means located at the top and bottom of the welding object aligned with the separator plate alignment jig and exerting a fixing force on the welding object,
The clamping means is,
top;
An elastic member coupled to the upper plate and installed to be elastically movable in the vertical direction; and
An upper support means is coupled to the elastic member, is supported on a welded portion of the weld object, and includes a pressing member having a 'T'-shaped extension plate extending in three directions,
The clamping means is,
A lower support means is installed at the lower part of the welding object corresponding to the upper support means,
The welding objects are a cathode separator plate and a perforated plate,
The lower support means is,
A welding device for a fuel cell stack separator plate, comprising a magnetic pin that penetrates the separator plate alignment jig to press and support the perforated plate from below and at the same time magnetically attracts the perforated plate and the cathode separator plate.
A separator plate alignment jig for aligning the welded objects transferred to the laser welding process through a series of automated processes and maintaining the combined state; and
It includes clamping means located at the top and bottom of the welding object aligned with the separator plate alignment jig and exerting a fixing force on the welding object,
The clamping means is,
top;
An elastic member coupled to the upper plate and installed to be elastically movable in the vertical direction; and
An upper support means is coupled to the elastic member, is supported on a welded portion of the weld object, and includes a pressing member having a 'T'-shaped extension plate extending in three directions,
The clamping means is,
A lower support means is installed at the lower part of the welding object corresponding to the upper support means,
The welding object is a perforated plate-cathode separator plate and anode separator plate,
The lower support means is,
A welding device for a fuel cell stack separator plate, comprising a protruding member supported on the separator plate alignment jig at a position corresponding to the pressing member, corresponding to the groove of the perforated plate-cathode separator plate.
According to claim 1 or 2,
Welding of the fuel cell stack separator plate, wherein the extension plate is provided with an extension portion that extends outward from one side of the plane beyond the edge of the upper plate and has a 'ㄷ'-shaped groove at a position corresponding to the welded portion of the extension plate. Device.
According to paragraph 1,
The separator plate alignment jig is,
It is formed in an inclined direction with respect to the longitudinal direction and includes a jig plate having a plurality of porous plate alignment grooves formed on the outer surface so that the porous plate can be aligned by an alignment unit,
A welding device for a fuel cell stack separator plate, wherein a pin through hole is integrally formed in the perforated plate alignment groove to allow the magnetic pin of the lower support means to move upward through the jig plate.
According to paragraph 1,
The welding device is,
a first welding portion that welds the cathode separator plate and the porous plate to form a porous plate-cathode separator plate; and
It includes a second welding portion for forming a separator set by welding the perforated plate-cathode separator plate and anode separator plate,
Arranged to move back and forth between the first welding portion and the second welding portion,
A first transfer module that transfers the cathode separator plate and the perforated plate from the cartridge to the first welding portion; and
It includes a second transfer module that transfers the anode separator plate from the cartridge to the second welding portion and transfers the perforated plate-cathode separator plate welded in the first welding portion onto the anode separator plate of the second welding portion. A welding device for a fuel cell stack separator comprising a transfer device.
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