JP6435875B2

JP6435875B2 - Fuel cell

Info

Publication number: JP6435875B2
Application number: JP2015009436A
Authority: JP
Inventors: 浮穴　雄二; 雄二浮穴
Original assignee: Miura Co Ltd
Current assignee: Miura Co Ltd
Priority date: 2015-01-21
Filing date: 2015-01-21
Publication date: 2018-12-12
Anticipated expiration: 2035-01-21
Also published as: JP2016134339A

Description

本発明は、燃料電池スタックと、燃料電池スタックを覆う断熱壁部材と、を備える燃料電池に関する。 The present invention relates to a fuel cell including a fuel cell stack and a heat insulating wall member that covers the fuel cell stack.

従来、燃料電池として、発電セルとセパレータとが交互に複数積層されて構成される燃料電池スタックと、燃料電池スタックを覆う断熱壁部材と、を備えるものがある（特許文献１参照）。断熱壁部材を備えることにより、燃料電池スタックの内側の温度と、燃料電池スタックの外側であって断熱容器の内側の温度とを、均一に保ちやすくなる。 Conventionally, some fuel cells include a fuel cell stack configured by alternately stacking a plurality of power generation cells and separators, and a heat insulating wall member that covers the fuel cell stack (see Patent Document 1). By providing the heat insulating wall member, it becomes easy to keep the temperature inside the fuel cell stack and the temperature outside the fuel cell stack and inside the heat insulating container uniform.

特開２０１４−３５９９０号公報JP 2014-35990 A

特許文献１に記載の断熱壁部材は、燃料電池スタックを覆っており、断熱性能を有している。しかしながら、燃料電池スタックを覆う断熱壁部材の断熱性能において、更に向上された断熱性能が望まれる。 The heat insulating wall member described in Patent Document 1 covers the fuel cell stack and has heat insulating performance. However, in the heat insulating performance of the heat insulating wall member that covers the fuel cell stack, further improved heat insulating performance is desired.

本発明は、断熱性能が一層向上された燃料電池を提供することを目的とする。 An object of the present invention is to provide a fuel cell with further improved heat insulation performance.

本発明は、発電セルとセパレータとが交互に複数積層されて構成される燃料電池スタックと、前記燃料電池スタックを覆う第１断熱壁部材であって、前記第１断熱壁部材の内側の空間と外側の空間との間の断熱を行う第１断熱壁部材と、を備える燃料電池であって、前記第１断熱壁部材の少なくとも上部及び側部を覆う第２断熱壁部材であって、前記第２断熱壁部材の内側の空間と外側の空間との間の断熱を行う第２断熱壁部材を更に備え、前記第２断熱壁部材は、複数の壁構成部材により構成され、前記燃料電池は、前記複数の壁構成部材同士を着脱可能な着脱部材を更に備え、前記第２断熱壁部材は、前記複数の壁構成部材同士を前記着脱部材で接続することで組み立てられる燃料電池に関する。 The present invention provides a fuel cell stack configured by alternately stacking a plurality of power generation cells and separators, a first heat insulating wall member that covers the fuel cell stack, and a space inside the first heat insulating wall member, A first heat insulating wall member that performs heat insulation with an outer space, and a second heat insulating wall member that covers at least an upper portion and a side portion of the first heat insulating wall member, 2 further comprising a second heat insulating wall member that performs heat insulation between the inner space and the outer space of the heat insulating wall member , wherein the second heat insulating wall member is composed of a plurality of wall constituent members, The second heat insulating wall member further relates to a fuel cell that is assembled by connecting the plurality of wall constituent members with the attaching / detaching member .

また、前記第２断熱壁部材の表面は、疎水性を有することが好ましい。 Moreover, it is preferable that the surface of the said 2nd heat insulation wall member has hydrophobicity.

また、前記第２断熱壁部材は、所定の芯材を外被材で覆って該外被材の内部を減圧し密封した真空断熱材であることが好ましい。 The second heat insulating wall member is preferably a vacuum heat insulating material in which a predetermined core material is covered with a covering material and the inside of the covering material is decompressed and sealed.

本発明によれば、断熱性能が一層向上された燃料電池を提供することができる。 According to the present invention, it is possible to provide a fuel cell with further improved heat insulation performance.

本実施形態に係る燃料電池システム１の全体構成図である。1 is an overall configuration diagram of a fuel cell system 1 according to an embodiment. 燃料電池２の概略構成図である。1 is a schematic configuration diagram of a fuel cell 2. FIG. 第２断熱壁部材９が組み立てられた状態を示す斜視図である。It is a perspective view which shows the state by which the 2nd heat insulation wall member 9 was assembled. 第２断熱壁部材９が分解された状態を示す斜視図である。It is a perspective view which shows the state by which the 2nd heat insulation wall member 9 was decomposed | disassembled.

以下、本発明に係る燃料電池及びこれを備える燃料電池システムの実施形態を、図面を参照しながら説明する。図１は、本実施形態に係る燃料電池システム１の全体構成図である。以下の説明において、「ライン」とは、流路、経路、管路等の総称である。 Hereinafter, embodiments of a fuel cell according to the present invention and a fuel cell system including the same will be described with reference to the drawings. FIG. 1 is an overall configuration diagram of a fuel cell system 1 according to the present embodiment. In the following description, “line” is a general term for a flow path, a path, a pipeline, and the like.

図１に示すように、本実施形態に係る燃料電池システム１は、燃料電池２と、燃焼器７と、熱交換器８と、を備える。
また、燃料電池システム１は、アノードガス供給ラインＬ１と、カソードガス供給ラインＬ２と、オフガスラインとしてのアノードオフガス排気ラインＬ３と、オフガスラインとしてのカソードオフガス排気ラインＬ４と、排ガス排気ラインＬ５と、燃焼ガスラインＬ６と、媒体流通ラインＬ７と、を備える。 As shown in FIG. 1, the fuel cell system 1 according to the present embodiment includes a fuel cell 2, a combustor 7, and a heat exchanger 8.
The fuel cell system 1 includes an anode gas supply line L1, a cathode gas supply line L2, an anode offgas exhaust line L3 as an offgas line, a cathode offgas exhaust line L4 as an offgas line, and an exhaust gas exhaust line L5. A combustion gas line L6 and a medium distribution line L7 are provided.

燃料電池２は、アノード側に供給されたアノードガス及びカソード側に供給されたカソードガスを反応させて発電する。発電により得られた直流電力は、例えば、ＤＣ／ＡＣコンバータ等（不図示）を介して交流電力に変換される。また、発電により生じたアノードオフガス及びカソードオフガスは、燃焼器７に送出される。 The fuel cell 2 generates power by reacting the anode gas supplied to the anode side and the cathode gas supplied to the cathode side. DC power obtained by power generation is converted into AC power via, for example, a DC / AC converter or the like (not shown). Further, the anode off-gas and cathode off-gas generated by power generation are sent to the combustor 7.

アノードガス供給ラインＬ１は、アノードガスの供給源から送出されたアノードガスが流通するラインである。アノードガス供給ラインＬ１の下流側の端部は、燃料電池２のアノード側に接続されている。 The anode gas supply line L1 is a line through which the anode gas sent from the anode gas supply source flows. The downstream end of the anode gas supply line L <b> 1 is connected to the anode side of the fuel cell 2.

カソードガス供給ラインＬ２は、カソードガスの供給源から送出されたカソードガスが流通するラインである。カソードガス供給ラインＬ２の下流側の端部は、燃料電池２のカソード側に接続されている。 The cathode gas supply line L2 is a line through which the cathode gas sent from the cathode gas supply source flows. The downstream end of the cathode gas supply line L2 is connected to the cathode side of the fuel cell 2.

アノードオフガス排気ラインＬ３は、燃料電池２からアノードオフガスを排気するラインである。アノードオフガス排気ラインＬ３の上流側の端部は、燃料電池２のアノードオフガス排気口に接続されている。アノードオフガス排気ラインＬ３の下流側の端部は、燃焼器７のアノードオフガス導入口に接続されている。 The anode off gas exhaust line L3 is a line for exhausting the anode off gas from the fuel cell 2. The upstream end of the anode offgas exhaust line L3 is connected to the anode offgas exhaust port of the fuel cell 2. The downstream end of the anode off gas exhaust line L3 is connected to the anode off gas inlet of the combustor 7.

カソードオフガス排気ラインＬ４は、燃料電池２からカソードオフガスを排気するラインである。カソードオフガス排気ラインＬ４の上流側の端部は、燃料電池２のカソードオフガス排気口に接続されている。カソードオフガス排気ラインＬ４の下流側の端部は、燃焼器７のカソードオフガス導入口に接続されている。 The cathode offgas exhaust line L4 is a line for exhausting the cathode offgas from the fuel cell 2. The upstream end of the cathode offgas exhaust line L4 is connected to the cathode offgas exhaust port of the fuel cell 2. The downstream end of the cathode offgas exhaust line L4 is connected to the cathode offgas inlet of the combustor 7.

燃焼器７は、アノードオフガス排気ラインＬ３及びカソードオフガス排気ラインＬ４に接続され、燃料電池２から排気されたアノードオフガス及びカソードオフガスを燃焼させる。 The combustor 7 is connected to the anode offgas exhaust line L3 and the cathode offgas exhaust line L4, and burns the anode offgas and the cathode offgas exhausted from the fuel cell 2.

排ガス排気ラインＬ５は、燃料電池２の発電により発生した排ガスＧ１を排気するラインである。排ガス排気ラインＬ５の上流側の端部は、第１断熱壁部材６の内側の空間（第１内側空間）６１（詳細は後述）に接続されている。 The exhaust gas exhaust line L5 is a line for exhausting the exhaust gas G1 generated by the power generation of the fuel cell 2. The upstream end of the exhaust gas exhaust line L5 is connected to a space (first inner space) 61 (details will be described later) inside the first heat insulating wall member 6.

燃焼ガスラインＬ６は、燃焼器７の排気口と燃料電池２における第１断熱壁部材６の内側の空間（第１内側空間）６１とを接続する。燃焼器７における燃焼により発生した燃焼ガスは、燃焼ガスラインＬ６を介して、燃料電池２の第１内側空間６１に送出されて供給される。 The combustion gas line L6 connects the exhaust port of the combustor 7 and a space (first inner space) 61 inside the first heat insulating wall member 6 in the fuel cell 2. The combustion gas generated by the combustion in the combustor 7 is sent and supplied to the first inner space 61 of the fuel cell 2 via the combustion gas line L6.

燃焼ガスラインＬ６には、熱交換器８が設けられている。熱交換器８には、媒体流通ラインＬ７が接続されている。熱交換器８は、燃焼器７から排気された燃焼ガスであって燃焼ガスラインＬ６を流通する燃焼ガスの熱を、媒体流通ラインＬ７を流通する媒体Ｂ１に伝達させて、媒体Ｂ１との間で熱交換を行い、媒体Ｂ１を加熱する。媒体Ｂ１は、液体（水）でもよく、気体（空気、ガス）でもよい。 A heat exchanger 8 is provided in the combustion gas line L6. A medium distribution line L7 is connected to the heat exchanger 8. The heat exchanger 8 transmits the heat of the combustion gas that is exhausted from the combustor 7 and that flows through the combustion gas line L6 to the medium B1 that flows through the medium distribution line L7. The medium B1 is heated by exchanging heat. The medium B1 may be liquid (water) or gas (air, gas).

次に、燃料電池２の詳細について説明する。図２は、燃料電池２の概略構成図である。
燃料電池２は、燃料電池スタック３と、上基盤４と、下基盤５と、第１断熱壁部材６と、第２断熱壁部材９と、ガイド部材５５と、を備える。
燃料電池スタック３は、発電セルとセパレータとが交互に複数積層されて構成される。 Next, details of the fuel cell 2 will be described. FIG. 2 is a schematic configuration diagram of the fuel cell 2.
The fuel cell 2 includes a fuel cell stack 3, an upper base 4, a lower base 5, a first heat insulating wall member 6, a second heat insulating wall member 9, and a guide member 55.
The fuel cell stack 3 is configured by alternately stacking a plurality of power generation cells and separators.

上基盤４及び下基盤５は、板状部材からなり、燃料電池スタック３を、発電セルとセパレータとの積層方向Ｄ１に直接的に又は間接的に挟む。「間接的に挟む」とは、上基盤４と燃料電池スタック３との間、又は下基盤５と燃料電池スタック３との間に、他の部材（ボルト頭部など）が介在している状態で挟むことを意味する。
燃料電池スタック３が上基盤４と下基盤５との間で積層方向Ｄ１に押圧されることにより、発電セルとセパレータとの隙間が小さくなり、ガスや液体のリークが低減され、電気的な導通が確保又は向上される。 The upper board | substrate 4 and the lower board | substrate 5 consist of plate-shaped members, and pinch | interpose the fuel cell stack 3 directly or indirectly in the lamination direction D1 of a power generation cell and a separator. “Indirectly sandwiching” means that another member (such as a bolt head) is interposed between the upper substrate 4 and the fuel cell stack 3 or between the lower substrate 5 and the fuel cell stack 3. Means sandwiched between.
When the fuel cell stack 3 is pressed between the upper substrate 4 and the lower substrate 5 in the stacking direction D1, the gap between the power generation cell and the separator is reduced, gas and liquid leaks are reduced, and electrical continuity is achieved. Is secured or improved.

第１断熱壁部材６は、燃料電池スタック３を、積層方向Ｄ１に対して直交する横方向Ｄ２から覆う。第１断熱壁部材６は、上部及び下部が開口した円筒状又は角筒状となっている。第１断熱壁部材６は、第１断熱壁部材６の内側の空間（第１内側空間）６１と外側の空間（第２内側空間）６２との間の断熱を行う。第１断熱壁部材６の上部は、後述するように、上基盤４により封鎖される。第１断熱壁部材６の下部は、後述するように、下基盤５によりほぼ封鎖される。第１断熱壁部材６を備えることにより、燃料電池スタック３の内側の温度と、燃料電池スタック３の外側であって第１断熱壁部材６の内側の空間（第１内側空間）６１の温度とを、均一に保ちやすくなる。第１断熱壁部材６は、例えば、シリカなどのセラミック材料から形成される。 The first heat insulating wall member 6 covers the fuel cell stack 3 from the lateral direction D2 orthogonal to the stacking direction D1. The first heat insulating wall member 6 has a cylindrical shape or a rectangular tube shape with an upper portion and a lower portion opened. The first heat insulating wall member 6 performs heat insulation between the space (first inner space) 61 inside the first heat insulating wall member 6 and the outer space (second inner space) 62. The upper part of the first heat insulating wall member 6 is sealed by the upper base 4 as will be described later. The lower part of the first heat insulating wall member 6 is substantially sealed off by the lower base 5 as will be described later. By providing the first heat insulating wall member 6, the temperature inside the fuel cell stack 3 and the temperature of the space 61 outside the fuel cell stack 3 and inside the first heat insulating wall member 6 (first inner space) Can be kept uniform. The 1st heat insulation wall member 6 is formed from ceramic materials, such as a silica, for example.

ガイド部材５５は、下基盤５における燃料電池スタック３の側（上側）に設けられ（載置され）、積層方向Ｄ１に沿って上基盤４に向けて延びている。本実施形態におけるガイド部材５５は、ボルト状部材から構成されている。ボルト状部材は、軸状のロッド部５６と、ロッド部５６よりも横方向Ｄ２の外方に延出する形状を有するボルト頭部５７と、を有する。ボルト頭部５７が下基盤５の上面５３に載置される。 The guide member 55 is provided (placed) on the side (upper side) of the fuel cell stack 3 in the lower base 5 and extends toward the upper base 4 along the stacking direction D1. The guide member 55 in this embodiment is comprised from the bolt-shaped member. The bolt-shaped member includes an axial rod portion 56 and a bolt head portion 57 having a shape extending outward in the lateral direction D2 from the rod portion 56. The bolt head 57 is placed on the upper surface 53 of the lower base 5.

なお、ガイド部材５５は、両端部に雄ネジを有するロッド部材と、それぞれの雄ネジに螺合されたナットとから、構成されることもできる。ガイド部材５５を構成するボルトやナットは、下基盤５に載置されなくてもよく、例えば、下基盤５よりも横方向Ｄ２の外方に配置されていてもよい。この場合、燃料電池スタック３は、下基盤５に直接的に又は間接的に（ボルト、ナット以外の部材を介して）載置される。 In addition, the guide member 55 can also be comprised from the rod member which has a male screw in both ends, and the nut screwed together by each male screw. The bolts and nuts constituting the guide member 55 do not have to be placed on the lower base 5, and may be arranged outside the lower base 5 in the lateral direction D <b> 2, for example. In this case, the fuel cell stack 3 is placed on the lower base 5 directly or indirectly (via a member other than a bolt and a nut).

上基盤４は、ガイド部材５５のロッド部５６が挿通されるガイド孔４１を有する。ガイド孔４１は、積層方向Ｄ１に沿って延びている。上基盤４は、ガイド部材５５のロッド部５６がガイド孔４１に挿通された状態において、下基盤５に向けて移動可能に構成される。 The upper base 4 has a guide hole 41 through which the rod portion 56 of the guide member 55 is inserted. The guide hole 41 extends along the stacking direction D1. The upper base 4 is configured to be movable toward the lower base 5 in a state where the rod portion 56 of the guide member 55 is inserted into the guide hole 41.

上基盤４と第１断熱壁部材６とは、一体的に構成されると共に、上基盤４が燃料電池スタック３を下基盤５に向けて加重する錘として機能する。詳細には、上基盤４の下部と第１断熱壁部材６とが連結されており、これにより、第１断熱壁部材６の上部は、上基盤４により封鎖される。上基盤４及び第１断熱壁部材６は、全体視で釣り鐘形状を有する。「一体的に構成される」とは、両者が完全に一体的に構成されている態様のみならず、別体を連結した結果一体的になった態様も含む。 The upper base 4 and the first heat insulating wall member 6 are integrally configured, and the upper base 4 functions as a weight that loads the fuel cell stack 3 toward the lower base 5. Specifically, the lower portion of the upper base 4 and the first heat insulating wall member 6 are connected to each other, whereby the upper portion of the first heat insulating wall member 6 is sealed by the upper base 4. The upper base 4 and the first heat insulating wall member 6 have a bell shape as a whole. The term “integrally configured” includes not only an aspect in which the two are completely integrated, but also an aspect in which they are integrated as a result of connecting separate bodies.

第１断熱壁部材６は、下基盤５に向かう移動が下基盤５によって阻害されないように構成される。詳細には、第１断熱壁部材６の内面６３と下基盤５の側面５１との間に、間隙が形成される。この間隙は、燃料電池２で発生した排ガスＧ１が流通可能な下基盤排ガス流路５２として機能する。間隙としての下基盤排ガス流路５２の大きさ、形状などは、排ガスＧ１が流通可能であると共に、第１断熱壁部材６による断熱機能が確保できる範囲で設定される。つまり、第１断熱壁部材６の下部は、下基盤５によりほぼ封鎖されることになる。 The first heat insulating wall member 6 is configured so that the movement toward the lower base 5 is not hindered by the lower base 5. Specifically, a gap is formed between the inner surface 63 of the first heat insulating wall member 6 and the side surface 51 of the lower base 5. This gap functions as a lower base exhaust gas passage 52 through which the exhaust gas G1 generated in the fuel cell 2 can flow. The size, shape, and the like of the lower base exhaust gas channel 52 as the gap are set within a range in which the exhaust gas G1 can flow and the heat insulating function by the first heat insulating wall member 6 can be secured. That is, the lower part of the first heat insulating wall member 6 is almost sealed off by the lower base 5.

第１断熱壁部材６の下端部６４は、横方向Ｄ２に視た場合に、下基盤５の側面５１に重なる位置に配置される。つまり、第１断熱壁部材６の下端部６４は、下基盤５の上面５３よりも低く、下基盤５の下面５４よりも高い位置に位置する。 The lower end portion 64 of the first heat insulating wall member 6 is disposed at a position overlapping the side surface 51 of the lower base 5 when viewed in the lateral direction D2. That is, the lower end portion 64 of the first heat insulating wall member 6 is located at a position lower than the upper surface 53 of the lower base 5 and higher than the lower surface 54 of the lower base 5.

第２断熱壁部材９は、燃料電池スタック３を覆う第１断熱壁部材６の少なくとも上部及び側部を覆う。第２断熱壁部材９は、燃料電池スタック３を、積層方向Ｄ１の上方側及び積層方向Ｄ１に対して直交する横方向Ｄ２から覆う。 The second heat insulating wall member 9 covers at least the upper part and the side part of the first heat insulating wall member 6 that covers the fuel cell stack 3. The second heat insulating wall member 9 covers the fuel cell stack 3 from the upper side in the stacking direction D1 and the lateral direction D2 orthogonal to the stacking direction D1.

本実施形態においては、第２断熱壁部材９は、天部を有し且つ下部が開口した方形筒状の箱体により構成される。第２断熱壁部材９は、第２断熱壁部材９の内側の空間であって第１断熱壁部材６と第２断熱壁部材９との間の空間（第２内側空間）６２と、第２断熱壁部材９の外側の空間（外側空間）６５と、の間の断熱を行う。 In this embodiment, the 2nd heat insulation wall member 9 is comprised by the square cylindrical box body which has a top part and the lower part opened. The second heat insulating wall member 9 is a space inside the second heat insulating wall member 9 and a space (second inner space) 62 between the first heat insulating wall member 6 and the second heat insulating wall member 9, and a second Heat insulation is performed between the outer space (outer space) 65 of the heat insulating wall member 9.

第２断熱壁部材９の上部は、後述するように、天板９１により封鎖される。第２断熱壁部材９の下部の開口は、複数のラインの配管が通され、不図示の閉鎖部材によりほぼ封鎖される。第２断熱壁部材９を備えることにより、第１断熱壁部材６の内側の空間（第１内側空間）６１の温度と、第１断熱壁部材６と第２断熱壁部材９との間の空間（第２内側空間）６２の温度とを、均一に保ちやすくなる。 The upper part of the second heat insulating wall member 9 is sealed by a top plate 91 as will be described later. A plurality of lines of piping are passed through the lower opening of the second heat insulating wall member 9 and are almost sealed off by a closing member (not shown). By providing the second heat insulating wall member 9, the temperature of the space (first inner space) 61 inside the first heat insulating wall member 6 and the space between the first heat insulating wall member 6 and the second heat insulating wall member 9. It becomes easy to keep the temperature of the (second inner space) 62 uniform.

本実施形態においては、第２断熱壁部材９の素材には、第１断熱壁部材６の素材とは異なる素材が用いられる。
第２断熱壁部材９としては、例えば、ガラス繊維で形成された綿状のグラスウールや、微細な多孔構造を形成した断熱材や、真空断熱材などが挙げられる。 In the present embodiment, a material different from the material of the first heat insulating wall member 6 is used as the material of the second heat insulating wall member 9.
Examples of the second heat insulating wall member 9 include cotton-like glass wool formed of glass fibers, a heat insulating material having a fine porous structure, and a vacuum heat insulating material.

微細な多孔構造を形成した断熱材としては、シリカの微粒粉を主成分とし、これを加圧成型して、微細な多孔構造を形成した断熱材がある。このような微細な多孔構造を形成した断熱材は、通常の断熱材よりも微細な多孔構造を形成するため、第２断熱壁部材９の厚さを薄くできる。 As a heat insulating material in which a fine porous structure is formed, there is a heat insulating material in which fine powder of silica is a main component and this is pressure-molded to form a fine porous structure. Since the heat insulating material having such a fine porous structure forms a fine porous structure as compared with a normal heat insulating material, the thickness of the second heat insulating wall member 9 can be reduced.

真空断熱材は、所定の芯材を外被材で覆って該外被材の内部を減圧し密封したものである。第２断熱壁部材９が真空断熱材の場合には、第２断熱壁部材９の厚さを薄くできる。例えば、第２断熱壁部材９に真空断熱材を使用する場合には、例えば、隙間が１０ｍｍ以下の場所にも、第２断熱壁部材９を設置することができる。 The vacuum heat insulating material is obtained by covering a predetermined core material with a jacket material and reducing the pressure inside the jacket material to seal it. When the 2nd heat insulation wall member 9 is a vacuum heat insulating material, the thickness of the 2nd heat insulation wall member 9 can be made thin. For example, when using a vacuum heat insulating material for the 2nd heat insulation wall member 9, the 2nd heat insulation wall member 9 can be installed also in the place where a clearance gap is 10 mm or less, for example.

第２断熱壁部材９の表面は、疎水性を有する。これにより、第２断熱壁部材９の表面は、水分の吸着が少ない。疎水性を有する構成としては、例えば、第２断熱壁部材９自体が疎水性を有する素材を含んで構成されることで表面が疎水性を有するように形成されていてもよいし、第２断熱壁部材９の表面に疎水加工を施してもよいし、第２断熱壁部材９の表面に疎水性を有する部材を貼り付けて構成してもよい。 The surface of the second heat insulating wall member 9 has hydrophobicity. Thereby, the surface of the 2nd heat insulation wall member 9 has little adsorption | suction of a water | moisture content. As a structure having hydrophobicity, for example, the second heat insulating wall member 9 itself may be formed to include a hydrophobic material so that the surface has hydrophobicity, or the second heat insulating wall member 9 itself may be formed. Hydrophobic processing may be applied to the surface of the wall member 9, or a hydrophobic member may be attached to the surface of the second heat insulating wall member 9.

第２断熱壁部材９の構成について更に詳細に説明する。図３は、第２断熱壁部材９が組み立てられた状態を示す斜視図である。図４は、第２断熱壁部材９が分解された状態を示す斜視図である。
第２断熱壁部材９は、図３及び図４に示すように、複数の壁構成部材９１，９２により構成される。第２断熱壁部材９は、複数の壁構成部材９１，９２に分割可能である。本実施形態においては、第２断熱壁部材９は、方形板状の１つの天板９１と、方形板状の４つの側板９２，９２，９２，９２と、に分割可能に構成される。 The configuration of the second heat insulating wall member 9 will be described in more detail. FIG. 3 is a perspective view showing a state in which the second heat insulating wall member 9 is assembled. FIG. 4 is a perspective view showing a state in which the second heat insulating wall member 9 is disassembled.
As shown in FIGS. 3 and 4, the second heat insulating wall member 9 is composed of a plurality of wall constituting members 91 and 92. The second heat insulating wall member 9 can be divided into a plurality of wall constituting members 91 and 92. In this embodiment, the 2nd heat insulation wall member 9 is comprised so that a square plate-like top plate 91 and the square plate-like four side plates 92, 92, 92, and 92 can be divided | segmented.

複数の壁構成部材９１，９２には、図３及び図４に示すように、複数の壁構成部材９１，９２同士を着脱可能な着脱部材９１１，９２１，９２２，９２３が設けられている。本実施形態においては、着脱部材９１１，９２１，９２２，９２３は、例えば、面ファスナーで構成されている。 As shown in FIGS. 3 and 4, the plurality of wall constituting members 91, 92 are provided with detachable members 911, 921, 922, 923 that can attach and detach the plurality of wall constituting members 91, 92. In the present embodiment, the detachable members 911, 921, 922, and 923 are constituted by, for example, hook-and-loop fasteners.

着脱部材９１１は、天板９１の４つの辺から、それぞれ、天板９１の外方に向けて延びる。４つの側板９２の上端部の表面には、着脱部材９１１を着脱可能な着脱部材９２３が設けられている。
着脱部材９２１は、４つの側板９２の一方の側辺から、それぞれ、側板９２の外方に向けて延びる。４つの側板９２の他方の側辺の表面には、着脱部材９２１を着脱可能な着脱部材９２２が設けられている。 The detachable member 911 extends from the four sides of the top plate 91 toward the outside of the top plate 91. An attachment / detachment member 923 to which the attachment / detachment member 911 can be attached / detached is provided on the surfaces of the upper end portions of the four side plates 92.
The detachable member 921 extends from one side of the four side plates 92 toward the outside of the side plate 92. On the surface of the other side of the four side plates 92, an attachment / detachment member 922 that can attach / detach the attachment / detachment member 921 is provided.

このように構成される第２断熱壁部材９を組み立てて燃料電池２に取り付ける場合には、図３及び４に示すように、４つの側板９２においては、着脱部材９２１を折り曲げて着脱部材９２２に接続し、天板９１においては、着脱部材９１１を折り曲げて着脱部材９２３に接続することにより組み立てられる。
また、第２断熱壁部材９を分解して燃料電池２から取り外す場合には、図３及び図４に示すように、４つの側板９２においては、着脱部材９２１を着脱部材９２２から取り外し、天板９１においては、着脱部材９１１を着脱部材９２３から取り外すことにより分解される。
このようにして、複数の壁構成部材９１，９２同士について着脱部材９１１，９２１を折り曲げて着脱部材９２２，９２３に接続することで組み立てられ、複数の壁構成部材９１，９２同士について着脱部材９２１，９１１を着脱部材９２２，９２３から取り外すことにより分解される。そのため、第２断熱壁部材９を簡単に組み立てることができ且つ簡単に分解することができる。 When the second heat insulating wall member 9 configured in this way is assembled and attached to the fuel cell 2, as shown in FIGS. 3 and 4, the detachable member 921 is bent to the detachable member 922 in the four side plates 92. The top plate 91 is assembled by bending the detachable member 911 and connecting it to the detachable member 923.
When the second heat insulating wall member 9 is disassembled and removed from the fuel cell 2, as shown in FIGS. 3 and 4, in the four side plates 92, the detachable member 921 is detached from the detachable member 922, and the top plate In 91, it is disassembled by removing the detachable member 911 from the detachable member 923.
In this way, the detachable members 911 and 921 are bent with respect to the plurality of wall constituting members 91 and 92 and connected to the detachable members 922 and 923, and the detachable member 921 with respect to the plurality of wall constituting members 91 and 92 is assembled. It is disassembled by removing 911 from the detachable members 922 and 923. Therefore, the second heat insulating wall member 9 can be easily assembled and can be easily disassembled.

上述した実施形態に係る燃料電池２によれば、例えば、以下のような効果が得られる。
本実施形態に係る燃料電池２においては、燃料電池スタック３と、燃料電池スタック３を覆う第１断熱壁部材６であって、第１断熱壁部材６の内側の第１内側空間６１と外側の第２内側空間６２との間の断熱を行う第１断熱壁部材６と、を備え、第１断熱壁部材６の少なくとも上部及び側部を覆う第２断熱壁部材９であって、第２断熱壁部材９の内側の第２内側空間６２と外側の外側空間６５との間の断熱を行う第２断熱壁部材９を更に備える。 According to the fuel cell 2 according to the above-described embodiment, for example, the following effects can be obtained.
In the fuel cell 2 according to the present embodiment, the fuel cell stack 3 and the first heat insulating wall member 6 that covers the fuel cell stack 3, the first inner space 61 inside the first heat insulating wall member 6, and the outer side A first heat insulating wall member 6 that performs heat insulation with the second inner space 62, and is a second heat insulating wall member 9 that covers at least the upper part and the side part of the first heat insulating wall member 6, and is a second heat insulating wall member 9. A second heat insulating wall member 9 is further provided for performing heat insulation between the second inner space 62 inside the wall member 9 and the outer space 65 outside.

そのため、燃料電池スタック３を覆う第１断熱壁部材６と、第１断熱壁部材６の少なくとも上部及び側部を覆う第２断熱壁部材９とにより、二重の断熱壁部材で、燃料電池スタック３を覆っている。よって、燃料電池スタック３を覆う断熱壁部材の断熱性能を一層向上できる。 Therefore, the fuel cell stack is a double heat insulating wall member by the first heat insulating wall member 6 covering the fuel cell stack 3 and the second heat insulating wall member 9 covering at least the upper part and the side part of the first heat insulating wall member 6. 3 is covered. Therefore, the heat insulating performance of the heat insulating wall member covering the fuel cell stack 3 can be further improved.

また、従来、燃料電池２を修理する場合等において、燃料電池２を停止させて修理を行った後に、起動すると、燃料電池スタック３を覆う断熱壁部材が水分を吸い込み、断熱性能が低下することがあった。
ここで、本発明においては、燃料電池スタック３を覆う第１断熱壁部材６と、第１断熱壁部材６の少なくとも上部及び側部を覆う第２断熱壁部材９と、を備えている。そのため、第１断熱壁部材６が水分を吸い込んでいる場合でも、第２断熱壁部材９を被せない状態で、燃料電池２の試運転を行うことができる。これにより、第１断熱壁部材６が吸い込んでいる水分を燃料電池２の試運転時の熱により蒸発させて、その後、第１断熱壁部材６には、第２断熱壁部材９を被せることができる。従って、第１断熱壁部材６が吸い込んでいる水分を蒸発させた後に、第１断熱壁部材６を第２断熱壁部材９で覆うことができるため、第１断熱壁部材６が水分を吸い込むことが低減される。その結果、第１断熱壁部材６の断熱性能を保持することができる。 Conventionally, when the fuel cell 2 is repaired, etc., when the fuel cell 2 is stopped and repaired and then started, the heat insulating wall member covering the fuel cell stack 3 sucks moisture, and the heat insulating performance is lowered. was there.
Here, in this invention, the 1st heat insulation wall member 6 which covers the fuel cell stack 3, and the 2nd heat insulation wall member 9 which covers at least the upper part and side part of the 1st heat insulation wall member 6 are provided. Therefore, even when the first heat insulating wall member 6 sucks moisture, the test operation of the fuel cell 2 can be performed without covering the second heat insulating wall member 9. Thereby, the water | moisture content inhaled by the 1st heat insulation wall member 6 can be evaporated by the heat | fever at the time of the test run of the fuel cell 2, and the 2nd heat insulation wall member 9 can be covered after that on the 1st heat insulation wall member 6. . Accordingly, since the first heat insulating wall member 6 can be covered with the second heat insulating wall member 9 after the water sucked by the first heat insulating wall member 6 is evaporated, the first heat insulating wall member 6 sucks water. Is reduced. As a result, the heat insulation performance of the first heat insulation wall member 6 can be maintained.

また、本実施形態に係る燃料電池２においては、第２断熱壁部材９の表面は、疎水性を有する。そのため、第２断熱壁部材９の表面は、水分の吸着が少ない。これにより、第２断熱壁部材９の断熱性能の低下を低減できる。
特に、第１断熱壁部材６が吸い込んでいる水分を蒸発させた後に、第１断熱壁部材６を第２断熱壁部材９で覆う場合に、第２断熱壁部材９の表面が水分の吸着が少ないため、第１断熱壁部材６及び第２断熱壁部材９の断熱性能を向上させて、燃料電池スタック３を覆う断熱壁部材（第１断熱壁部材６及び第２断熱壁部材９）の全体としての断熱性能を向上させることができる。 Further, in the fuel cell 2 according to the present embodiment, the surface of the second heat insulating wall member 9 has hydrophobicity. Therefore, the surface of the second heat insulating wall member 9 has little moisture adsorption. Thereby, the fall of the heat insulation performance of the 2nd heat insulation wall member 9 can be reduced.
In particular, when the first heat insulating wall member 6 is covered with the second heat insulating wall member 9 after the water sucked by the first heat insulating wall member 6 is evaporated, the surface of the second heat insulating wall member 9 adsorbs water. Since there are few, the heat insulation performance of the 1st heat insulation wall member 6 and the 2nd heat insulation wall member 9 improves, and the whole heat insulation wall member (the 1st heat insulation wall member 6 and the 2nd heat insulation wall member 9) which covers the fuel cell stack 3 As a result, the heat insulation performance can be improved.

また、本実施形態に係る燃料電池２においては、第２断熱壁部材９は、所定の芯材を外被材で覆って該外被材の内部を減圧し密封した真空断熱材である。そのため、真空断熱材を使用することにより、第２断熱壁部材９の厚さを薄くできる。これにより、第２断熱壁部材９を配置する自由度を向上できる。また、第２断熱壁部材９の厚さを薄くして、第２断熱壁部材９の外形を小さくできるため、燃料電池２をコンパクトに構成できる。 Further, in the fuel cell 2 according to the present embodiment, the second heat insulating wall member 9 is a vacuum heat insulating material in which a predetermined core material is covered with a covering material, and the inside of the covering material is decompressed and sealed. Therefore, the thickness of the 2nd heat insulation wall member 9 can be made thin by using a vacuum heat insulating material. Thereby, the freedom degree which arrange | positions the 2nd heat insulation wall member 9 can be improved. Moreover, since the thickness of the 2nd heat insulation wall member 9 can be made thin and the external shape of the 2nd heat insulation wall member 9 can be made small, the fuel cell 2 can be comprised compactly.

また、本実施形態に係る燃料電池２においては、第２断熱壁部材９は、１つの天板９１及び４つの側板９２同士を着脱部材９１１，９２１，９２２，９２３で接続することで組み立てられる。そのため、第２断熱壁部材９を簡単に組み立てることができるため、燃料電池２のメンテナンス性を向上できる。 Further, in the fuel cell 2 according to the present embodiment, the second heat insulating wall member 9 is assembled by connecting one top plate 91 and four side plates 92 with the detachable members 911, 921, 922 and 923. For this reason, the second heat insulating wall member 9 can be easily assembled, so that the maintainability of the fuel cell 2 can be improved.

以上、本発明の好ましい実施形態について説明した。しかし、本発明は、上述した実施形態に限定されることなく、種々の形態で実施することができる。
例えば、本実施形態に係る燃料電池システム１においては、複数のラインの配管は、第２断熱壁部材９の下部の開口に通されるように構成されたが、これに制限されない。例えば、複数のラインの配管は、第２断熱壁部材９を貫通するように構成してもよい。 The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and can be implemented in various forms.
For example, in the fuel cell system 1 according to the present embodiment, the piping of the plurality of lines is configured to pass through the lower opening of the second heat insulating wall member 9, but is not limited thereto. For example, a plurality of lines of piping may be configured to penetrate the second heat insulating wall member 9.

２燃料電池
３燃料電池スタック
６第１断熱壁部材
９第２断熱壁部材
９１天板（壁構成部材）
９２側板（壁構成部材）
９１１，９２１，９２２，９２３着脱部材 2 Fuel cell 3 Fuel cell stack 6 1st heat insulation wall member 9 2nd heat insulation wall member 91 Top plate (wall component)
92 Side plate (wall component)
911, 921, 922, 923 Detachable member

Claims

A fuel cell stack configured by alternately stacking a plurality of power generation cells and separators;
A first heat insulating wall member that covers the fuel cell stack, and a first heat insulating wall member that performs heat insulation between an inner space and an outer space of the first heat insulating wall member, ,
A second heat insulating wall member that covers at least an upper part and a side part of the first heat insulating wall member, and performs heat insulation between an inner space and an outer space of the second heat insulating wall member. In addition ,
The second heat insulating wall member is constituted by a plurality of wall constituting members,
The fuel cell further includes an attachment / detachment member that can attach / detach the plurality of wall constituting members,
The second heat insulating wall member is assembled by connecting the plurality of wall constituting members with the detachable member .

The fuel cell according to claim 1, wherein a surface of the second heat insulating wall member has hydrophobicity.

3. The fuel cell according to claim 1, wherein the second heat insulating wall member is a vacuum heat insulating material in which a predetermined core material is covered with a covering material, and the inside of the covering material is decompressed and sealed.