WO2017038165A1 - 燃料電池用セパレータの塗膜形成装置及び燃料電池用セパレータ - Google Patents
燃料電池用セパレータの塗膜形成装置及び燃料電池用セパレータ Download PDFInfo
- Publication number
- WO2017038165A1 WO2017038165A1 PCT/JP2016/064799 JP2016064799W WO2017038165A1 WO 2017038165 A1 WO2017038165 A1 WO 2017038165A1 JP 2016064799 W JP2016064799 W JP 2016064799W WO 2017038165 A1 WO2017038165 A1 WO 2017038165A1
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- WO
- WIPO (PCT)
- Prior art keywords
- separator
- fuel cell
- coating film
- pressure surface
- lower mold
- Prior art date
Links
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Definitions
- the present invention relates to an apparatus for forming a coating film by thermal transfer on a base material constituting a fuel cell separator and a fuel cell separator.
- the fuel cell stack is provided with a separator that forms a flow path for fuel gas, oxidizing gas, or cooling water.
- a separator there is one having a base material formed by press-molding a metal plate material such as a stainless steel plate or a titanium plate.
- a coating material including a binder made of a thermosetting resin and conductive particles is applied to the surface of the substrate, There is a method in which the base material is hot pressed to cure the binder.
- a method of thermally transferring a coating film onto the surface of a substrate using a thermal transfer film is also a method of thermally transferring a coating film onto the surface of a substrate using a thermal transfer film.
- a film 160 on which a coating film 162 is formed is prepared in advance.
- the base material 150 is placed on the pressure surface of the lower mold 120, and the coating film 162 on the thermal transfer film 160 faces the base material 150 on the base material 150.
- the film 160 is placed.
- the upper mold 130 is moved toward the lower mold 120, and the substrate 150 and the thermal transfer film 160 are sandwiched between the pressure surface of the lower mold 120 and the pressure surface of the upper mold 130, and the lower mold 120 and the upper mold are also sandwiched. 130 is energized and heated.
- the lower mold 120 and the upper mold 130 may be preheated before the substrate 150 and the thermal transfer film 160 are placed.
- the coating film 162 of the thermal transfer film 160 is thermally transferred to the top surface of the protrusion 151 of the substrate 150.
- the height of the top surfaces of the plurality of protrusions 151 of the base material 150 may vary in manufacturing. Therefore, even if the base 150 and the thermal transfer film 160 are clamped by the lower mold 120 and the upper mold 130, the coating film 162 of the thermal transfer film 160 is pressed against the lower surface of the top surface of the protrusion 151. As shown in FIG. 14, the coating film 162 is not properly thermally transferred. As a result, in the part where the coating film 162 is not thermally transferred, there arises a problem that the corrosion resistance cannot be increased and the contact resistance cannot be reduced.
- An object of the present invention is to provide a fuel cell separator coating film forming apparatus and a fuel cell separator capable of appropriately thermally transferring a coating film to a substrate.
- a fuel cell separator coating film forming apparatus for achieving the above object is an apparatus for forming a coating film by thermal transfer on a base material constituting a fuel cell separator, and includes a lower mold having a heating part and An upper die is provided, and at least one of the pressure surface of the lower die and the pressure surface of the upper die is formed of a heat-resistant elastic member.
- the base material and the film are sandwiched between the lower die and the upper die with the thermal transfer film interposed between at least one of the lower die pressure surface and the upper die pressure surface and the substrate.
- the coating film is thermocompression bonded to the surface of the substrate, and the coating film is thermally transferred from the thermal transfer film to the substrate.
- the pressure surface in contact with the film is constituted by a heat-resistant elastic member, the pressure surface follows the surface of the base material due to elastic deformation of the elastic member, and the portion of the surface where the film is not pressed can be reduced. it can.
- the coating film can be appropriately thermally transferred to the substrate.
- Sectional drawing which shows the state which is coating the 3rd coating material on the surface of the flat separator of 2nd Embodiment.
- Sectional drawing of the coating-film formation apparatus of 2nd Embodiment The expanded sectional view which shows the flat separator, the porous flow path board, and thermal transfer film before thermocompression bonding.
- Sectional drawing which shows the coating-film formation apparatus of a modification, and is equivalent to the cross section of the apparatus of 1st Embodiment along the 12-12 line of FIG. 3 (A).
- Sectional drawing which shows the state by which the base material and the film for thermal transfer were mounted on the lower mold
- a polymer electrolyte fuel cell (hereinafter referred to as a fuel cell) includes a plurality of cells 90 each having a membrane electrode assembly 96 and a pair of separators 91 and 92 sandwiching the membrane electrode assembly 96.
- the membrane electrode assembly 96 includes an electrolyte membrane made of a solid polymer membrane, and a fuel electrode and an air electrode (both not shown) sandwiching the electrolyte membrane, and is referred to as a so-called MEGA (Mebrane Electrode Gas Diffusion Layer Assembly). Is done.
- MEGA Mebrane Electrode Gas Diffusion Layer Assembly
- the first separator 91 has a base material 50 formed by press-molding a titanium plate. As shown in FIG. 2, a plurality of ridges 51 are formed on the upper surface of the base material 50, and a concave groove 52 is formed between the ridges 51 adjacent to each other. Similarly, a plurality of protrusions 51 are formed on the lower surface of the first separator 91, and a concave groove 52 is formed between adjacent protrusions 51. A concave groove 52 on the lower surface is located on the opposite side of the protrusion 51 formed on the upper surface. A ridge 51 on the lower surface is located on the opposite side of the groove 52 formed on the upper surface.
- a membrane electrode assembly 96 is in contact with the lower surface of the first separator 91.
- a flat separator 93 that is a metal flat plate is in contact with the upper surface of the first separator 91.
- the groove 52 facing the membrane electrode assembly 96 in the first separator 91 constitutes a fuel gas flow path, and the groove 52 facing the flat separator 93 in the first separator 91 is the flow of cooling water. Constitutes the road.
- a coating 62 having corrosion resistance and conductivity is formed on the top surface of each protrusion 51 of the first separator 91 by thermal transfer.
- the base material of the second separator 92 includes a flat separator 93 and a porous flow path plate 94 interposed between the flat separator 93 and the membrane electrode assembly 96.
- the flat separator 93 and the porous flow path plate 94 are formed of a titanium plate.
- the porous flow path plate 94 is made of, for example, lath cut metal.
- a large number of through holes 941 are formed in the porous flow path plate 94, and an oxidant gas flow path 95 is formed by these through holes 941.
- the coating film forming apparatus 10 that thermally transfers the coating film 62 to the top surface of the protrusions 51 of the substrate 50 will be described.
- the coating film forming apparatus 10 includes a lower mold 20 and a plurality of guide pillars 11 fixed to the outer periphery of the lower mold 20 and extending upward.
- the upper die 30 is located above the lower die 20 and is guided by the guide pillar 11 so as to be movable in the vertical direction.
- the lower mold 20 is made of a metal material and has a heating part 21 protruding upward.
- a heating wire 22 is built in the lower mold 20, and the heating unit 21 is heated by energizing the heating wire 22. Further, a sheet-like elastic member 40 that forms a pressure surface of the lower mold 20 is provided on the upper portion of the heating unit 21 of the lower mold 20.
- the upper mold 30 is formed of a metal material and has a heating part 31 protruding downward.
- a heating wire 32 is built in the upper mold 20, and the heating unit 31 is heated by energizing the heating wire 32.
- a sheet-like elastic member 40 that forms a pressure surface of the upper mold 30 is provided below the heating unit 31 of the upper mold 30.
- the elastic member 40 includes a pair of rubber sheets 41 formed of a heat-resistant rubber material such as fluoro rubber, and a direction along the pressure surface interposed between the pair of rubber sheets 41. And a regulating member 42 that regulates the expansion of the rubber sheet 41 in the left-right direction in FIG.
- the restricting member 42 of the present embodiment is a reinforcing cloth formed of glass fiber, and is bonded to a pair of rubber sheets 41.
- the lower mold 20 is formed with a plurality of receiving holes 25 positioned on the outer periphery of the elastic member 40. As shown in FIG. A plurality of support members 27 that are biased upward by springs 28 are accommodated in the plurality of accommodation holes 25, respectively. A support surface 271 is formed at the upper end of each support member 27.
- the thermal transfer film 60 includes a base film 61 made of a synthetic resin such as polyethylene terephthalate and a coating film 62 provided on one surface of the base film 61.
- the coating film 62 of this embodiment is composed of two layers 63 and 64.
- the first layer 63 includes graphite particles 632 and a first binder 631 and is directly applied to the base film 61.
- the first binding material 631 of this embodiment is, for example, polyvinylidene fluoride (PVDF) resin.
- PVDF polyvinylidene fluoride
- a preferable range of the particle diameter of the graphite particles 632 is 0.1 to 100 ⁇ m.
- the first binder 631 may be omitted, and the first layer 63 may be configured by only the graphite particles 632.
- the second layer 64 includes conductive particles 642 and a second binder 641, and is coated on the first layer 63.
- the second binding material 641 of this embodiment is, for example, an epoxy resin 641.
- As the conductive particles titanium nitride having a higher hardness than the titanium oxide film as the base material 50 and having conductivity is preferable.
- a preferable range of the particle diameter of the conductive particles 642 is 0.1 to 10 ⁇ m.
- the base film 61 is conveyed in the direction indicated by the arrow in the figure, and the coating head 81 of the coating machine (not shown) is applied to the upper surface of the base film 61.
- First coating 63A is applied.
- the first paint 63A contains a solvent in addition to the first binder 631 and the graphite particles 632, and these are uniformly mixed.
- the solvent is, for example, N-methyl-2-pyrrolidone (NMP).
- the base film 61 is conveyed in the direction indicated by the arrow in the figure, and the surface of the first layer 61 (first coating 63A) formed on the base film 61 is applied.
- the second coating 64A is applied through the coating head 82 of a coating machine (not shown).
- the second paint 64A contains a solvent in addition to the second binder 641 and the conductive particles 642, and these are uniformly mixed.
- the solvent is, for example, methyl ethyl ketone (MEK).
- the thermal transfer film 60 shown in FIG. 6C is formed.
- a procedure for thermally transferring the coating film 62 onto the surface of the substrate 50 will be described.
- the pressure surface of the upper mold 30 is spaced upward from the pressure surface of the lower mold 20, and the support surface 271 of the support member 27 is the pressure surface of these pressure surfaces.
- the pair of thermal transfer films 60 and the substrate 50 are placed on the support surface 271 of the support member 27.
- the pair of thermal transfer films 60 and the base material 50 are supported by the support member 27 at positions separated from both the pressure surface of the lower mold 20 and the pressure surface of the upper mold 30.
- the upper mold 30 is moved toward the lower mold 20, and a pair of upper and lower thermal transfer films 60 and a base are formed by the pressure surface of the lower mold 20 and the pressure surface of the upper mold 30.
- the coating film 62 of the pair of upper and lower thermal transfer films 60 is pressed against the top surfaces of the protrusions 51 on the upper surface and the lower surface of the substrate 50.
- the substrate 50 is heated to a predetermined temperature by energizing the heating wires 22 and 32 and heating the heating portions 21 and 31 respectively.
- the predetermined temperature is a temperature at which an epoxy resin that is a thermosetting resin constituting the second layer 64 is cured, and is 200 ° C. in the present embodiment.
- the coating film 62 is thermocompression bonded to the top surface of each protrusion 51 of the base material 50, and the coating film 62 is thermally transferred from the thermal transfer film 60 to the base material 50.
- the pair of thermal transfer films 60 and the base material 50 are supported by the support member 27 at positions separated from both the pressure surface of the lower mold 20 and the pressure surface of the upper mold 30. From this state, the pressure and heating of the pair of thermal transfer films 60 and the base material 50 are sequentially performed. For this reason, the pair of thermal transfer films 60 and the substrate 50 do not come into contact with the pressing surface of the lower mold 20 before being pressed, and the pair of thermal transfer films 60 and the substrate are received by receiving heat through the pressing surfaces. It can suppress that the temperature of 50 rises and the epoxy resin which comprises the 2nd layer 64 thermosets. Thus, by applying pressure before the epoxy resin is thermally cured, the conductive particles and the graphite particles are easily moved between the epoxy resins. For this reason, the conductive particles 642 pass through the oxide film of the substrate 50 and come into contact with the main body of the substrate 50, and the conductive particles 642 and the graphite particles 632 come into contact with each other.
- the pair of thermal transfer films 60 and the base material 50 may be sandwiched between the pressure surface of the lower mold 20 and the pressure surface of the upper mold 30 that are cooled to room temperature, and the heating units 21 and 31 may be heated from this state. Conceivable. However, in this case, since the coating film forming apparatus 10 cannot be operated until the pressing surface of the lower mold 20 and the pressing surface of the upper mold 30 are cooled to room temperature, the operating efficiency of the coating film forming apparatus 10 is low. Become.
- the lower mold 20 and the upper mold are caused by elastic deformation of the elastic member 40.
- the 30 pressure surfaces follow the top surfaces of the protrusions 51 on the front surface and the back surface of the substrate 50, respectively, and the portion of the top surface of the protrusions 51 where the thermal transfer film 60 is not pressed is reduced. Therefore, the coating film 62 is appropriately thermally transferred to the substrate 50.
- the height of the protrusions 51 on the upper surface of the base material 50 is exaggerated so as to differ depending on the position.
- both the pressure surface of the lower mold 20 and the pressure surface of the upper mold 30 constituting the coating film forming apparatus 10 are formed by a heat-resistant elastic member 40.
- the pressure surfaces of the lower mold 20 and the upper mold 30 follow the top surfaces of the protrusions 51 on the front surface and the back surface of the base member 50 due to the elastic deformation of the elastic member 40, respectively.
- the coating film is applied to the entire portion of the top surface of each protrusion 51 of the substrate 50 that is pressed by the pressing surface. 62 can be appropriately thermally transferred.
- a regulating member 42 for regulating the expansion of the rubber sheet 41 in the direction along the pressing surface is interposed.
- the extension of the rubber sheet 41 in the direction along the pressing surface is regulated by the regulating member 42, when the base material 50 is clamped by the elastic member 40, the pressing surface becomes the base material 50.
- the rubber sheet 41 is effectively elastically deformed so as to follow the top surface of each protrusion 51. For this reason, it is possible to easily reduce the portion of the top surface of the ridge 51 where the thermal transfer film 60 is not pressed.
- the restricting member 42 is configured by a reinforcing cloth formed of glass fiber, it is possible to effectively restrict the extension of the rubber sheet 41 in the direction along the pressing surface.
- the substrate 50 and the thermal transfer film 60 are separated from both of these pressure surfaces.
- the supporting member 27 is supported.
- the lower mold 20 is provided with a spring 28 that urges the support member 27 upward.
- the support member 27 is moved upward by the biasing force of the spring 28 only by separating the upper mold 30 upward from the lower mold 20. Thereby, the support surface 271 of the support member 27 is arrange
- the surface of the porous flow path plate 94 that constitutes the base material of the second separator 92 that contacts the membrane electrode assembly 96 (upper surface in FIG. 8) has corrosion resistance.
- the coating film 62 which has electroconductivity is formed by thermal transfer.
- the configuration of the coating film 62 is the same as the coating film 62 of the first embodiment, and includes a first layer 63 and a second layer 64.
- the flat separator 93 and the porous flow path plate 94 constituting the second separator 92 are thermocompression bonded by a third bonding material 65 made of a thermosetting resin.
- the third binding material 65 of this embodiment is an epoxy resin.
- the flat separator 93 and the porous flow path plate 94 are bonded together by the third bonding material 65 in a state where they are overlapped with each other at a predetermined surface pressure.
- the periphery of the contact surface between the flat separator 93 and the porous flow path plate 94 is surrounded by the third binder 65 over the entire circumference.
- the third binding material 65 is slightly present between the contact surfaces of the flat separator 93 and the porous flow path plate 94.
- the third paint 65A contains a solvent in addition to the above-described epoxy resin, and is uniformly mixed.
- the solvent is, for example, methyl ethyl ketone (MEK).
- the flat separator 93, the porous flow path plate 94, and the thermal transfer film 60 in which the third binding material 65 is formed on the support surface 271 of the support member 27 of the coating film forming apparatus 10. are placed in the same order.
- the coating film forming apparatus 10 of the second embodiment has the same configuration as the coating film forming apparatus 10 of the first embodiment.
- the upper mold 30 is moved toward the lower mold 20, and the flat separator 93, the porous flow path plate 94, and the pressure surface of the lower mold 20 and the pressure surface of the upper mold 30, and The thermal transfer film 60 is clamped.
- the flat separator 93 and the porous flow path plate 94 are heated to a predetermined temperature by energizing the heating wires 22 and 32 and heating the heating portions 21 and 31 respectively.
- This predetermined temperature is a temperature at which the epoxy resin that is the second bonding material 641 and the third bonding material 65 constituting the second layer 64 of the coating film 62 is cured, and is 200 ° C. in this embodiment.
- the coating film 62 is thermocompression bonded to one surface of the porous flow path plate 94, and the coating film 62 is thermally transferred from the thermal transfer film 60 to the porous flow path plate 94.
- the porous flow path plate 94 and the flat separator 93 are thermocompression bonded to each other by the third bonding material 65 in a state where the flat separator 93 is superimposed on the lower surface of the porous flow path plate 94.
- the third binding material 65 on the flat separator 93 is pushed out to the outer peripheral side from between the contact surfaces of the flat separator 93 and the porous flow path plate 94.
- the third bonding material 65 thus pushed out surrounds the entire periphery of the contact surface between the flat separator 93 and the porous flow path plate 94.
- the upper mold 30 is separated from the lower mold 20, and the integrated porous flow path plate 94 and flat separator 93 are taken out from the coating film forming apparatus 10.
- the following effects are newly obtained in addition to the effects (1) to (6) of the first embodiment. It is done.
- the flat separator 93 and the porous flow path plate 94 are bonded by the third bonding material 65 in a state where they are overlapped with each other. For this reason, the base material of the flat separator 93 and the base material of the porous flow path plate 94 are in direct contact. Thereby, for example, the coating film 62 is formed on the surface of the flat separator 93, the coating film 62 is formed on the surface of the porous flow path plate 94, and the coating film 62 of the flat separator 93 and the coating film of the porous flow path plate 94.
- the contact resistance can be reduced as compared with the configuration in which 62 is brought into contact with the contact.
- the said embodiment can also be changed as follows, for example.
- the lower mold 20 and the upper mold 30 may be preheated before the base material 50 and the thermal transfer film 60 are placed.
- the second embodiment the same applies to the second embodiment.
- the 1st separator 91, the flat separator 93, and the porous flow-path board 94 can also be formed with metal plates other than a stainless steel plate and a titanium plate.
- the coating film 62 can also be formed with respect to at least one surface of the porous flow-path board 94 shown in FIG.
- the third paint 65A may be applied to the surface of the porous flow path plate 94 facing the flat separator 93. In this case, the application of the third paint 65A to the flat separator 93 may be omitted.
- thermal transfer is performed on the surface of the flat separator 93 opposite to the surface facing the porous flow path plate 94.
- the coating film may be thermally transferred using a film similar to the film 60 for use.
- the support member 27 can be omitted.
- the thermal transfer film 260 may be transported between the pressure surface of the lower mold 20 and the pressure surface of the upper mold 30 by the transport device 70 using the rollers 71 and 72. That is, the conveying device 70 includes a roller 71 around which a belt-shaped heat transfer film 260 is wound and a roller 72 that winds up the heat transfer film 260. These rollers 71 and 72 are rotationally driven by a motor (not shown). . In this case, the portion of the thermal transfer film 260 that has been subjected to thermal transfer can be automatically sent out from between the pressure surface of the lower mold 20 and the pressure surface of the upper mold 30. The trouble of placing a thermal transfer film thereon can be omitted.
- FIG. 12 shows a structure corresponding to the cross-sectional structure taken along the line 12-12 in FIG. Further, in the same figure, illustration of the support member 27 is omitted.
- the elastic member 40 can be provided only on one of the lower mold 20 and the upper mold 30.
- the regulating member 42 can also be formed of a fiber material other than glass fiber, for example, heat-resistant synthetic fiber such as aramid fiber, or carbon fiber.
- the regulating member 42 can be omitted.
- the elastic member 40 can be formed by a single rubber sheet 41.
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Abstract
Description
以下、図1~図7を参照して、第1実施形態について説明する。
図1に示すように、固体高分子形燃料電池(以下、燃料電池)は、膜電極接合体96と、膜電極接合体96を挟む一対のセパレータ91,92とを有するセル90が複数積層されることによって構成されるスタックを備えている。
図1に示すように、第2セパレータ92の基材は、フラットセパレータ93と、フラットセパレータ93と膜電極接合体96との間に介在された多孔性流路板94とによって構成されている。フラットセパレータ93及び多孔性流路板94はチタン板によって形成されている。また、多孔性流路板94は例えばラスカットメタルによって形成されている。多孔性流路板94には、多数の貫通孔941が形成されており、これらの貫通孔941によって酸化剤ガスの流路95が形成される。
図3(A)及び図3(B)に示すように、塗膜形成装置10は、下型20と、下型20の外周部に固設され、上方に向けて延びる複数の案内柱11と、下型20の上方に位置し、案内柱11により上下方向に移動可能に案内される上型30とを備えている。
次に、熱転写用フィルム60について説明する。
図6(A)に示すように、まずは、同図の矢印にて示す方向にベースフィルム61を搬送するとともに、ベースフィルム61の上面に対して、塗工機(図示略)の塗工ヘッド81から第1塗料63Aを塗布する。第1塗料63Aには、第1結合材631及びグラファイト粒子632の他に溶剤が含まれ、これらが均一に混合されている。なお、溶剤は例えばN-メチル-2-ピロリドン(NMP)である。
次に、基材50の表面に塗膜62を熱転写する手順について説明する。
図3(A)に示すように、熱転写に際しては、まず、上型30の加圧面が下型20の加圧面から上方に離間しており、支持部材27の支持面271がこれらの加圧面の間に位置している状態において、支持部材27の支持面271上に、一対の熱転写用フィルム60及び基材50を載置する。このとき、一対の熱転写用フィルム60及び基材50は、下型20の加圧面及び上型30の加圧面の双方からそれぞれ離間した位置において支持部材27によって支持される。
次に、本実施形態の作用について説明する。
(1)塗膜形成装置10を構成する下型20の加圧面及び上型30の加圧面の双方が、耐熱性の弾性部材40によって形成されている。このため、弾性部材40の弾性変形によって下型20及び上型30の加圧面が基材50の表面及び裏面の各突条51の頂面にそれぞれ追従し、各突条51の頂面のうち熱転写用フィルム60が圧接されない部位を少なくすることができる。したがって、基材50に対して塗膜62を適切に熱転写することができる。よって、第1セパレータ91の接触抵抗を低減することができる。
こうした構成によれば、加圧面に沿った方向へのゴムシート41の伸びが規制部材42によって規制されるため、弾性部材40によって基材50が挟圧された際に、加圧面が基材50の各突条51の頂面に追従するようにゴムシート41が効果的に弾性変形する。このため、突条51の頂面のうち熱転写用フィルム60が圧接されない部位を少なくすることが容易にできる。
(5)塗膜形成装置10は、下型20の加圧面と上型30の加圧面とが離間しているときに、基材50及び熱転写用フィルム60をこれら加圧面の双方から離間した状態で支持する支持部材27を備えている。
(6)下型20には、支持部材27を上方に向けて付勢するばね28が設けられている。
以下、図8~図11を参照して、第2実施形態について説明する。
第2実施形態では、図8に示すように、第2セパレータ92の基材を構成する多孔性流路板94における膜電極接合体96に当接する面(同図の上面)に、耐腐食性及び電導性を有する塗膜62が熱転写により形成されている。この塗膜62の構成は、第1実施形態の塗膜62と同一であり、第1層63及び第2層64を有している。
図9に示すように、同図の矢印にて示す方向にフラットセパレータ93を搬送するとともに、フラットセパレータ93の上面に対して、塗工機(図示略)の塗工ヘッド83を通じて第3塗料65Aを塗布する。これにより、第3結合材65の層が形成される。第3塗料65Aには、上述したエポキシ樹脂の他に溶剤が含まれ、均一に混合されている。なお、溶剤は例えばメチルエチルケトン(MEK)である。
図10及び図11に示すように、塗膜形成装置10の支持部材27の支持面271上に、第3結合材65が形成されたフラットセパレータ93、多孔性流路板94、熱転写用フィルム60を同順にて載置する。第2実施形態の塗膜形成装置10は、第1実施形態の塗膜形成装置10と同一の構成である。
以上説明した本実施形態に係る燃料電池用セパレータの塗膜形成装置及び燃料電池セパレータによれば、第1実施形態の効果(1)~(6)に加えて、新たに以下に示す効果が得られる。
なお、上記実施形態は、例えば以下のように変更することもできる。
・第1実施形態において、下型20及び上型30が、基材50及び熱転写用フィルム60が載置される前に予め加熱されていてもよい。また、第2実施形態においても同様である。
・図1に示す多孔性流路板94の少なくとも一方の面に対して塗膜62を形成することもできる。
・図12に示すように、ローラ71,72を用いた搬送装置70によって下型20の加圧面と上型30の加圧面との間に熱転写用フィルム260を搬送するようにしてもよい。すなわち、搬送装置70は、帯状の熱転写用フィルム260が巻かれたローラ71と、熱転写用フィルム260を巻き取るローラ72とを備えており、これらローラ71,72は図示しないモータによって回転駆動される。この場合、熱転写用フィルム260のうち熱転写に供された部分を下型20の加圧面と上型30の加圧面との間から自動的に送り出すことが可能となるため、下型20の加圧面上に熱転写用フィルムを載置するなどの手間を省略することができる。なお、図12は、図3(A)の12-12線に沿った断面構造に対応した構造を示している。また、同図においては、支持部材27の図示を省略している。
・ガラス繊維以外の繊維材料、例えばアラミド繊維などの耐熱性の合成繊維や、炭素繊維によって規制部材42を形成することもできる。
Claims (7)
- 燃料電池用セパレータを構成する基材に対して熱転写により塗膜を形成する装置であって、
加熱部をそれぞれ有する下型及び上型を備え、
前記下型の加圧面及び前記上型の加圧面の少なくとも一方は、耐熱性の弾性部材によって形成されている、
燃料電池用セパレータの塗膜形成装置。 - 前記弾性部材は前記加圧面全体にわたって設けられている、
請求項1に記載の燃料電池用セパレータの塗膜形成装置。 - 前記弾性部材は、前記加圧面を形成する耐熱性のゴムシートと、同加圧面に沿った方向への同ゴムシートの伸びを規制する規制部材と、を有している、
請求項1または請求項2に記載の燃料電池用セパレータの塗膜形成装置。 - 前記規制部材は、繊維材料により形成された補強クロスである、
請求項3に記載の燃料電池用セパレータの塗膜形成装置。 - 前記下型の加圧面及び前記上型の加圧面の双方が、前記弾性部材によって形成されている、
請求項1~請求項4のいずれか一項に記載の燃料電池用セパレータの塗膜形成装置。 - 前記下型の加圧面と前記上型の加圧面とが離間しているときに、前記基材及び熱転写用フィルムをこれら加圧面の双方から離間した状態で支持する支持部材を備えている、
請求項1~請求項5のいずれか一項に記載の燃料電池用セパレータの塗膜形成装置。 - 平板状のフラットセパレータ及び多孔性流路板を含む基材と、
前記フラットセパレータと前記多孔性流路板とを互いに重ね合わせた状態で結合する結合材とを有し、
前記結合材は、前記フラットセパレータと前記多孔性流路板との接触面の周囲を囲んでいる、
燃料電池用セパレータ。
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JP2019121523A (ja) * | 2018-01-09 | 2019-07-22 | トヨタ車体株式会社 | 燃料電池用セパレータの製造方法 |
JP2019204659A (ja) * | 2018-05-23 | 2019-11-28 | トヨタ車体株式会社 | 燃料電池用セパレータ及び燃料電池用セパレータの製造方法 |
JP2020102394A (ja) * | 2018-12-25 | 2020-07-02 | トヨタ車体株式会社 | 燃料電池用セパレータの表面処理方法 |
JP2021077527A (ja) * | 2019-11-11 | 2021-05-20 | トヨタ車体株式会社 | 燃料電池用セパレータ、燃料電池用セパレータの製造方法、及び熱転写用シートの製造方法 |
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JP6897471B2 (ja) * | 2017-10-04 | 2021-06-30 | トヨタ車体株式会社 | 燃料電池用ガス流路形成板および燃料電池スタック |
JP7081307B2 (ja) * | 2018-05-28 | 2022-06-07 | トヨタ紡織株式会社 | 燃料電池用セパレータ |
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JPWO2017038165A1 (ja) | 2018-02-01 |
EP3346530A1 (en) | 2018-07-11 |
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US20180069248A1 (en) | 2018-03-08 |
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