JP2021163520A - Method for repairing seal member and fuel cell system - Google Patents

Method for repairing seal member and fuel cell system Download PDF

Info

Publication number
JP2021163520A
JP2021163520A JP2020060614A JP2020060614A JP2021163520A JP 2021163520 A JP2021163520 A JP 2021163520A JP 2020060614 A JP2020060614 A JP 2020060614A JP 2020060614 A JP2020060614 A JP 2020060614A JP 2021163520 A JP2021163520 A JP 2021163520A
Authority
JP
Japan
Prior art keywords
fuel cell
temperature
softening point
operating temperature
fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2020060614A
Other languages
Japanese (ja)
Other versions
JP7349950B2 (en
Inventor
和徹 南
Kazuyuki Minami
孝之 中尾
Takayuki Nakao
雄也 宅和
Yuya Takuwa
雅也 佐々木
Masaya Sasaki
伸 岩田
Shin Iwata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osaka Gas Co Ltd
Original Assignee
Osaka Gas Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Osaka Gas Co Ltd filed Critical Osaka Gas Co Ltd
Priority to JP2020060614A priority Critical patent/JP7349950B2/en
Publication of JP2021163520A publication Critical patent/JP2021163520A/en
Application granted granted Critical
Publication of JP7349950B2 publication Critical patent/JP7349950B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Landscapes

  • Fuel Cell (AREA)

Abstract

To provide a method for repairing a seal member used in a fuel cell system.SOLUTION: Disclosed is a method for repairing a seal member in a fuel cell system 100 which has a fuel battery cell A and includes: a fuel cell module 23 in which constituent members are joined to each other by a seal member applied to a joint portion for joining the constituent members together; and an operation control part 71 for controlling operation of the fuel battery cell A. In a state where a first member constituting the seal member is melted at an operating temperature higher than a normal operation temperature of the fuel battery cell A, a second member made of a material is applied having a second softening point temperature lower than a first softening point temperature of the first member, and a composite member including the first member and the second member is formed, the operation control part 71 executes a second operation mode which controls the fuel battery cell A to operate so that the seal member can be heated at the operating temperature higher than the normal operating temperature of the fuel battery cell A and at the temperature equal to or higher than a second softening point temperature and less than the first softening point temperature.SELECTED DRAWING: Figure 1

Description

本発明は、シール部材の修復方法及び燃料電池システムに関する。 The present invention relates to a method for repairing a seal member and a fuel cell system.

特許文献１の燃料電池システムは、燃料ガスを供給するマニホールドと、マニホールドから燃料ガスの供給を受けるセルスタックとを備えている。セルスタックは、長手方向に延びる楕円形の筒状の複数のセルが、マニホールドに対して長手方向が突出するように、かつ、平行に立設して構成されている。セルは、マニホールドからの燃料ガスの供給と、空気の供給とを受けて電気化学反応によって発電を行う。 The fuel cell system of Patent Document 1 includes a manifold for supplying fuel gas and a cell stack for receiving fuel gas from the manifold. The cell stack is configured such that a plurality of elliptical cylindrical cells extending in the longitudinal direction are erected in parallel with each other so as to project in the longitudinal direction with respect to the manifold. The cell receives the supply of fuel gas from the manifold and the supply of air to generate electricity by an electrochemical reaction.

特許文献１では、マニホールドに設けられた挿入口にセルの長手方向の一端が挿入されて接合され、シール部材で封止される。また、隣接するセルの一端どうしもシール部材によって封止されている。特許文献１のシール部材は、表層部の緻密部と、緻密部の下部の多孔質部と、その他の部分とから構成されている。多孔質部の下端はシール部材の下端にまで達している。このようなシール部材の構成により、シール部材内部の熱収縮による応力を緩和することができ、シール部材の表層部にまでシール部材の剥離が進むことを抑制できるとされている。よって、セルとマニホールドとの接合部分、セル間の接合部分などのシール部材が設けられた箇所におけるシール部材の剥離を抑制できるとされている。 In Patent Document 1, one end of the cell in the longitudinal direction is inserted into an insertion port provided in the manifold to be joined, and the cell is sealed with a sealing member. Further, one ends of adjacent cells are also sealed by a sealing member. The seal member of Patent Document 1 is composed of a dense portion of a surface layer portion, a porous portion below the dense portion, and other portions. The lower end of the porous portion reaches the lower end of the sealing member. It is said that such a configuration of the seal member can alleviate the stress due to heat shrinkage inside the seal member and suppress the peeling of the seal member from proceeding to the surface layer portion of the seal member. Therefore, it is said that peeling of the seal member can be suppressed at a place where the seal member is provided, such as a joint portion between the cell and the manifold and a joint portion between the cells.

特開２０１７−１１２０４５号公報Japanese Unexamined Patent Publication No. 2017-112045

しかし、接合部分のシール部材に急激な温度変化が生じた場合、運搬及び地震等の振動により許容値以上の応力が接合部分のシール部材にかかった場合等には、シール部材に破損が生じる可能性がある。そうすると、破損部分から燃料ガス等が漏洩する。現状では、シール部材に破損が生じると、燃料電池セルの使用が困難である。 However, if a sudden temperature change occurs in the seal member of the joint portion, or if stress exceeding the allowable value is applied to the seal member of the joint portion due to vibration such as transportation or an earthquake, the seal member may be damaged. There is sex. Then, fuel gas or the like leaks from the damaged portion. At present, it is difficult to use a fuel cell if the seal member is damaged.

そこで、本発明は上述の課題に鑑みてなされたものであり、燃料電池システムに用いるシール部材の修復方法及びシール部材の修復方法を実行可能な燃料電池システムを提供することを目的とする。 Therefore, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a fuel cell system capable of performing a method for repairing a seal member used in a fuel cell system and a method for repairing the seal member.

本発明に係るシール部材の修復方法は、
燃料電池セルを有し、構成部材どうしを接合する接合部分に適用されるシール部材で前記構成部材どうしが接合されている燃料電池モジュールと、前記燃料電池セルの運転を制御する運転制御部とを備える燃料電池システムにおける前記シール部材の修復方法であって、その特徴構成は、
前記シール部材は、前記燃料電池セルの通常の運転温度より高温の運転温度において溶融し、第１軟化点温度を有する材料からなる第１部材を含み、
前記運転制御部は、
通常の運転温度で前記燃料電池セルを運転するように制御する第１運転モードを実行可能であり、
前記第１部材に、前記燃料電池セルの前記通常の運転温度より高温の運転温度において溶融し、かつ、前記第１部材の前記第１軟化点温度より低い第２軟化点温度を有する材料からなる第２部材が適用され、前記第１部材及び前記第２部材を含む複合部材が形成された状態で、前記燃料電池セルの前記通常の運転温度より高温の運転温度であり、かつ、前記第２軟化点温度以上前記第１軟化点温度未満で前記シール部材を加熱可能に前記燃料電池セルを運転するように制御する第２運転モードを実行する点にある。 The method for repairing the seal member according to the present invention is as follows.
A fuel cell module having a fuel cell and having the components joined to each other by a seal member applied to a joining portion for joining the components, and an operation control unit for controlling the operation of the fuel cell. A method for repairing the seal member in a fuel cell system to be provided, wherein the characteristic configuration thereof is as follows.
The sealing member includes a first member made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a first softening point temperature.
The operation control unit
It is possible to execute a first operation mode that controls the fuel cell to operate at a normal operating temperature.
The first member is made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a second softening point temperature lower than the first softening point temperature of the first member. In a state where the second member is applied and the first member and the composite member including the second member are formed, the operating temperature is higher than the normal operating temperature of the fuel cell and the second member is formed. The point is to execute a second operation mode for controlling the fuel cell to operate the seal member so as to be able to heat the seal member at a temperature equal to or higher than the softening point temperature and lower than the first softening point temperature.

上記特徴構成によれば、シール部材は第１部材を含んで構成されている。この第１部材からなるシール部材に、第２部材が適用されて第１部材及び第２部材を含む複合部材が形成された状態となる。例えば、第１部材にひび剥がれ等の破損が生じた場合に、第１部材に第２部材が適用されて複合部材が形成された状態となる。
第１部材は燃料電池セルの通常の運転温度より高温の運転温度において溶融し、第１軟化点温度を有し、第２部材は燃料電池セルの通常の運転温度より高温の運転温度において溶融し、かつ、第１軟化点温度より低い第２軟化点温度を有する。上記の複合部材が形成された状態で、運転制御部が、第２軟化点温度以上第１軟化点温度未満でシール部材を加熱可能に燃料電池セルを運転する第２運転モードを実行すると、第１部材は溶融せずそのままの形状を維持するが、第２部材が溶融して流動状態となる。よって、第１部材に破損が生じている場合には、第２部材が第１部材の破損部分に埋め込まれてシール部材が修復される。これにより、シール部材が破損した場合であっても修復することで、接合部分を封止して燃料ガス等の漏洩を抑制することができる。また、シール部材の修復を燃料電池セルの運転温度を調整することで行うことができる。 According to the above characteristic configuration, the seal member is configured to include the first member. The second member is applied to the seal member made of the first member to form a composite member including the first member and the second member. For example, when the first member is damaged such as cracked, the second member is applied to the first member to form a composite member.
The first member melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a first softening point temperature, and the second member melts at an operating temperature higher than the normal operating temperature of the fuel cell. And has a second softening point temperature lower than the first softening point temperature. When the operation control unit executes the second operation mode in which the fuel cell is operated so that the seal member can be heated at the temperature equal to or higher than the second softening point temperature and lower than the temperature of the first softening point in the state where the above-mentioned composite member is formed, the second operation mode is executed. The first member does not melt and maintains its shape as it is, but the second member melts and becomes in a flowing state. Therefore, when the first member is damaged, the second member is embedded in the damaged portion of the first member to repair the seal member. As a result, even if the seal member is damaged, it can be repaired to seal the joint portion and suppress leakage of fuel gas or the like. Further, the seal member can be repaired by adjusting the operating temperature of the fuel cell.

本発明に係るシール部材の修復方法は、
燃料電池セルを有し、構成部材どうしを接合する接合部分に適用されるシール部材で前記構成部材どうしが接合されている燃料電池モジュールと、前記燃料電池セルの運転を制御する運転制御部とを備える燃料電池システムにおける前記シール部材の修復方法であって、その特徴構成は、
前記シール部材は、前記燃料電池セルの通常の運転温度より高温の運転温度において溶融し、第１軟化点温度を有する材料からなる第１部材を含み、
前記第１部材に、前記燃料電池セルの前記通常の運転温度より高温の運転温度において溶融し、かつ、前記第１部材の前記第１軟化点温度より低い第２軟化点温度を有する材料からなる第２部材を適用し、前記第１部材及び前記第２部材を含む複合部材を形成する工程と、
前記複合部材が形成された状態で、前記燃料電池セルの前記通常の運転温度より高温の運転温度であり、かつ、前記第２軟化点温度以上前記第１軟化点温度未満で前記シール部材を加熱可能に前記燃料電池セルを運転する工程と、を備える点にある。 The method for repairing the seal member according to the present invention is as follows.
A fuel cell module having a fuel cell and having the components joined to each other by a seal member applied to a joining portion for joining the components, and an operation control unit for controlling the operation of the fuel cell. A method for repairing the seal member in a fuel cell system to be provided, wherein the characteristic configuration thereof is as follows.
The sealing member includes a first member made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a first softening point temperature.
The first member is made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a second softening point temperature lower than the first softening point temperature of the first member. A step of applying the second member to form the first member and a composite member including the second member, and
In the state where the composite member is formed, the seal member is heated at an operating temperature higher than the normal operating temperature of the fuel cell and at a temperature equal to or higher than the second softening point temperature and lower than the first softening point temperature. The point is that the process of operating the fuel cell can be provided.

本発明に係る燃料電池システムは、
燃料電池セルを有し、構成部材どうしを接合する接合部分に適用されるシール部材で前記構成部材どうしが接合されている燃料電池モジュールと、前記燃料電池セルの運転を制御する運転制御部とを備える燃料電池システムであって、その特徴構成は、
前記シール部材は、前記燃料電池セルの通常の運転温度より高温の運転温度において溶融し、第１軟化点温度を有する材料からなる第１部材を含み、
前記運転制御部は、
通常の運転温度で前記燃料電池セルを運転するように制御する第１運転モードを実行可能であり、
前記第１部材に、前記燃料電池セルの前記通常の運転温度より高温の運転温度において溶融し、かつ、前記第１部材の前記第１軟化点温度より低い第２軟化点温度を有する材料からなる第２部材が適用され、前記第１部材及び前記第２部材を含む複合部材が形成された状態で、前記燃料電池セルの前記通常の運転温度より高温の運転温度であり、かつ、前記第２軟化点温度以上前記第１軟化点温度未満で前記シール部材を加熱可能に前記燃料電池セルを運転するように制御する第２運転モードを実行する点にある。 The fuel cell system according to the present invention
A fuel cell module having a fuel cell and having the components joined to each other by a seal member applied to a joining portion for joining the components, and an operation control unit for controlling the operation of the fuel cell. It is a fuel cell system equipped with, and its characteristic configuration is
The sealing member includes a first member made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a first softening point temperature.
The operation control unit
It is possible to execute a first operation mode that controls the fuel cell to operate at a normal operating temperature.
The first member is made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a second softening point temperature lower than the first softening point temperature of the first member. In a state where the second member is applied and the first member and the composite member including the second member are formed, the operating temperature is higher than the normal operating temperature of the fuel cell and the second member is formed. The point is to execute a second operation mode for controlling the fuel cell to operate the seal member so as to be able to heat the seal member at a temperature equal to or higher than the softening point temperature and lower than the first softening point temperature.

本発明に係るシール部材の修復方法は、
燃料電池セルを有し、構成部材どうしを接合する接合部分に適用されるシール部材で前記構成部材どうしが接合されている燃料電池モジュールと、加熱部とを備える燃料電池システムにおける前記シール部材の修復方法であって、
前記シール部材は、前記燃料電池セルの通常の運転温度より高温の運転温度において溶融し、第１軟化点温度を有する材料からなる第１部材を含み、その特徴構成は、
前記第１部材に、前記燃料電池セルの前記通常の運転温度より高温の運転温度において溶融し、かつ、前記第１部材の前記第１軟化点温度より低い第２軟化点温度を有する材料からなる第２部材が適用され、前記第１部材及び前記第２部材を含む複合部材が構成された状態で、前記加熱部は、前記第２軟化点温度以上前記第１軟化点温度未満で前記複合部材を加熱する点にある。 The method for repairing the seal member according to the present invention is as follows.
Repair of the seal member in a fuel cell system including a fuel cell module having a fuel cell and a seal member applied to a joint portion for joining the constituent members to which the constituent members are joined, and a heating portion. It ’s a method,
The sealing member includes a first member made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a first softening point temperature, and its characteristic configuration is as follows.
The first member is made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a second softening point temperature lower than the first softening point temperature of the first member. In a state where the second member is applied and the first member and the composite member including the second member are configured, the heating unit is the composite member at a temperature equal to or higher than the second softening point temperature and lower than the first softening point temperature. Is at the point of heating.

加熱部が、第２軟化点温度以上第１軟化点温度未満で複合部材を加熱すると、第１部材は溶融せずそのままの形状を維持するが、第２部材が溶融して流動状態となる。よって、第１部材に破損が生じている場合には、第２部材が第１部材の破損部分に埋め込まれてシール部材が修復される。これにより、シール部材が破損した場合であっても修復することで、接合部分を封止して燃料ガス等の漏洩を抑制することができる。 When the heating unit heats the composite member at a temperature equal to or higher than the second softening point temperature and lower than the first softening point temperature, the first member does not melt and maintains its original shape, but the second member melts and becomes in a flowing state. Therefore, when the first member is damaged, the second member is embedded in the damaged portion of the first member to repair the seal member. As a result, even if the seal member is damaged, it can be repaired to seal the joint portion and suppress leakage of fuel gas or the like.

燃料電池システムの全体構成を示すブロック図である。It is a block diagram which shows the whole structure of a fuel cell system. 円筒平板型の燃料電池モジュールを示す側面図である。It is a side view which shows the cylindrical flat plate type fuel cell module. 円筒平板型の燃料電池モジュールを示す上面図である。It is a top view which shows the cylindrical flat plate type fuel cell module. 円筒平板型の燃料電池モジュールにおける一部拡大斜視図である。It is a partially enlarged perspective view of a cylindrical flat plate type fuel cell module. 円筒平板型の燃料電池モジュールにおけるシール部材の配置を示す拡大図である。It is an enlarged view which shows the arrangement of the seal member in a cylindrical flat plate type fuel cell module. 円筒平板型の燃料電池モジュールにおけるシール部材の破損部分を示す拡大図である。It is an enlarged view which shows the damaged part of the seal member in a cylindrical flat plate type fuel cell module. 円筒平板型の燃料電池モジュールにおけるシール部材を構成する第１部材の破損部分に第２部材が適用されている様子を示す拡大図である。It is an enlarged view which shows the appearance that the 2nd member is applied to the damaged part of the 1st member which constitutes the seal member in a cylindrical flat plate type fuel cell module. 円筒平板型の燃料電池モジュールにおけるシール部材が修復されている様子を示す拡大図である。It is an enlarged view which shows the state that the seal member in a cylindrical flat plate type fuel cell module is repaired. 平板型の燃料電池モジュールを示す分解斜視図である。It is an exploded perspective view which shows the flat-plate type fuel cell module. 平板型の燃料電池モジュールにおける燃料ガスの流れを示す断面図である。It is sectional drawing which shows the flow of fuel gas in a flat plate type fuel cell module. 平板型の燃料電池モジュールにおける酸化剤ガスの流れを示す断面図である。It is sectional drawing which shows the flow of the oxidant gas in a flat-plate type fuel cell module. 平板型の燃料電池モジュールにおけるシール部材の配置を示す拡大図である。It is an enlarged view which shows the arrangement of the seal member in a flat plate type fuel cell module. 平板型の燃料電池モジュールにおけるシール部材の破損部分を示す拡大図である。It is an enlarged view which shows the damaged part of the seal member in a flat plate type fuel cell module. 平板型の燃料電池モジュールにおけるシール部材を構成する第１部材の破損部分に第２部材が適用されている様子を示す拡大図である。It is an enlarged view which shows the appearance that the 2nd member is applied to the damaged part of the 1st member which constitutes the seal member in a flat-plate type fuel cell module. 平板型の燃料電池モジュールにおけるシール部材が修復されている様子を示す拡大図である。It is an enlarged view which shows the state that the seal member in a flat plate type fuel cell module is repaired. 円筒型の燃料電池モジュールを示す側面図である。It is a side view which shows the cylindrical fuel cell module. 円筒型の燃料電池モジュールにおけるシール部材の配置を示す拡大図である。It is an enlarged view which shows the arrangement of the seal member in a cylindrical fuel cell module. 円筒型の燃料電池モジュールにおけるシール部材の破損部分を示す拡大図である。It is an enlarged view which shows the damaged part of the seal member in a cylindrical fuel cell module. 円筒型の燃料電池モジュールにおけるシール部材を構成する第１部材の破損部分に第２部材が適用されている様子を示す拡大図である。It is an enlarged view which shows the appearance that the 2nd member is applied to the damaged part of the 1st member which constitutes the seal member in a cylindrical fuel cell module. 円筒型の燃料電池モジュールにおけるシール部材が修復されている様子を示す拡大図である。It is an enlarged view which shows the state that the seal member in a cylindrical fuel cell module is repaired. シール部材の配置の他の例を示す模式図である。It is a schematic diagram which shows another example of arrangement of a seal member. 他の燃料電池システムの全体構成を示すブロック図である。It is a block diagram which shows the whole structure of another fuel cell system.

〔実施形態〕
以下に、本発明の実施形態に係るシール部材の修復方法について、図１を用いて説明する。 [Embodiment]
Hereinafter, a method for repairing the seal member according to the embodiment of the present invention will be described with reference to FIG.

（１）燃料電池システムの構成
（１−１）全体構成
燃料電池システム１００は、図１に示すように、燃料電池発電装置１を備えている。また、燃料電池システム１００は、燃料電池発電装置１に燃料ガス、改質水及び酸化剤ガスを供給するために、燃料ガス供給用の燃料ガス用ポンプ２と、昇圧ポンプ５と、脱硫器３と、改質水供給用の改質水タンク９と、酸化剤ガス供給用の空気ブロア１５とを備えている。また、燃料電池システム１００は、燃料電池発電装置１から排出される熱を再利用する排熱利用部としての熱交換器１７と、熱交換器１７との間で循環させる水等の熱媒を収容する貯湯タンク１９とを備えている。また、燃料電池システム１００は、燃料電池システム１００の運転を制御する運転制御部７１を備えている。 (1) Configuration of Fuel Cell System (1-1) Overall Configuration The fuel cell system 100 includes a fuel cell power generation device 1 as shown in FIG. Further, the fuel cell system 100 includes a fuel gas pump 2 for supplying fuel gas, a booster pump 5, and a desulfurizer 3 in order to supply fuel gas, reformed water, and oxidant gas to the fuel cell power generation device 1. The reformed water tank 9 for supplying the reformed water and the air blower 15 for supplying the oxidizing agent gas are provided. Further, the fuel cell system 100 uses a heat medium such as water circulated between the heat exchanger 17 as an exhaust heat utilization unit that reuses the heat discharged from the fuel cell power generation device 1 and the heat exchanger 17. It is provided with a hot water storage tank 19 for accommodating. Further, the fuel cell system 100 includes an operation control unit 71 that controls the operation of the fuel cell system 100.

本実施形態の運転制御部７１は、通常の運転温度よりも高温で後述の燃料電池セルＡを運転するように制御する第２運転モードを実行する。これによりシール部材を補修し、燃料ガス及び酸化剤ガス等の各種ガス（以下、単に燃料ガス等という場合もある）の漏洩を抑制する。この点については後述する。 The operation control unit 71 of the present embodiment executes a second operation mode in which the fuel cell A described later is controlled to operate at a temperature higher than the normal operation temperature. As a result, the seal member is repaired, and leakage of various gases such as fuel gas and oxidant gas (hereinafter, may be simply referred to as fuel gas or the like) is suppressed. This point will be described later.

都市ガス（例えば、都市ガス１３Ａ）等の炭化水素系の原燃料は、燃料ガス用ポンプ２により所定流量の出力が制御されて昇圧ポンプ５に供給される。さらに、原燃料は、昇圧ポンプ５の作動により原燃料供給路４１を通して脱硫器３に供給される。 A hydrocarbon-based raw material fuel such as city gas (for example, city gas 13A) is supplied to the booster pump 5 by controlling the output of a predetermined flow rate by the fuel gas pump 2. Further, the raw fuel is supplied to the desulfurizer 3 through the raw fuel supply path 41 by the operation of the booster pump 5.

脱硫器３は、原燃料に含まれる硫黄化合物成分を除去（脱硫）する。原燃料中に硫黄化合物が含有される場合、脱硫器３を備えることにより、硫黄化合物による改質器２８あるいは燃料電池発電装置１に対する影響を抑制することができる。 The desulfurizer 3 removes (desulfurizes) the sulfur compound component contained in the raw material fuel. When the raw material and fuel contain a sulfur compound, the desulfurization device 3 can be provided to suppress the influence of the sulfur compound on the reformer 28 or the fuel cell power generation device 1.

改質水タンク９からは、改質水ポンプ７の作動により改質水供給路４３を通して燃料電池発電装置１に改質水が供給される。 From the reforming water tank 9, reforming water is supplied to the fuel cell power generation device 1 through the reforming water supply path 43 by the operation of the reforming water pump 7.

改質水タンク９は、後述の触媒燃焼排ガスから凝縮水を回収する。また、改質水タンク９に供給される凝縮水を水精製器（図示せず）により精製するようになっている。具体的には、熱交換器１７の出口から排出路５１を介して排出される後述の触媒燃焼排ガスから、凝縮水回収路４５を介して凝縮水を水精製器（図示せず）に回収する。そして、水精製器（図示せず）により精製された凝縮水が改質水タンク９に回収される。 The reforming water tank 9 recovers condensed water from the catalyst combustion exhaust gas described later. Further, the condensed water supplied to the reformed water tank 9 is purified by a water purifier (not shown). Specifically, the condensed water is recovered from the catalyst combustion exhaust gas, which will be described later, discharged from the outlet of the heat exchanger 17 via the discharge path 51, to a water purifier (not shown) via the condensed water recovery path 45. .. Then, the condensed water purified by the water purifier (not shown) is collected in the reformed water tank 9.

また、改質水タンク９には、凝縮水とは独立に、水供給部１３から水を供給可能になっている。 Further, water can be supplied to the reformed water tank 9 from the water supply unit 13 independently of the condensed water.

燃料電池発電装置１は、収納容器４０内に収納されており、燃料電池モジュール２３、気化器２７、改質器２８及び燃焼部２９を備えている。 The fuel cell power generation device 1 is housed in a storage container 40, and includes a fuel cell module 23, a vaporizer 27, a reformer 28, and a combustion unit 29.

気化器２７には、改質水供給路４３を介して改質水タンク９から改質水が供給され、原燃料供給路４１を介して脱硫された原燃料が供給される。原燃料供給路４１は脱硫器３よりも下流側の部位で、改質水供給路４３に合流されており、収納容器４０外にて合流された改質水と原燃料とが気化器２７に供給される。改質水及び原燃料が供給された気化器２７は、改質水から水蒸気を生成する。気化器２７にて生成された水蒸気を含む原燃料は、水蒸気含有原燃料供給路３１を通して改質器２８に供給される。 The vaporizer 27 is supplied with reformed water from the reformed water tank 9 via the reformed water supply path 43, and is supplied with desulfurized raw fuel via the raw material fuel supply path 41. The raw material fuel supply path 41 is a portion downstream of the desulfurizer 3 and is merged with the reformed water supply path 43, and the reformed water merged outside the storage container 40 and the raw material fuel are merged into the vaporizer 27. Be supplied. The vaporizer 27 to which the reformed water and the raw material fuel are supplied generates steam from the reformed water. The steam-containing raw material and fuel produced by the vaporizer 27 is supplied to the reformer 28 through the steam-containing raw material and fuel supply path 31.

改質器２８は、気化器２７にて生成された水蒸気を用いて、脱硫器３において脱硫された原燃料を水蒸気改質して、水素ガスを主成分とする燃料ガス（還元性成分を有するガス）を生成する。このとき、改質器２８は、後述の燃焼部２９での燃料成分ガスを含む未燃ガスの燃焼により発生する燃焼熱を用いて原燃料の水蒸気改質を行う。 The reformer 28 steam reforms the raw fuel desulfurized in the desulfurization device 3 using the steam generated by the vaporizer 27, and has a fuel gas containing hydrogen gas as a main component (having a reducing component). Gas) is generated. At this time, the reformer 28 performs steam reforming of the raw fuel by using the combustion heat generated by the combustion of the unburned gas including the fuel component gas in the combustion unit 29 described later.

改質器２８にて生成された燃料ガスは、燃料ガス供給路３３を通して燃料電池モジュール２３に供給される。燃料ガスは、燃料電池モジュール２３を構成する複数の燃料電池セルＡに対して分配されて供給される。各燃料電池セルＡは、燃料ガスが供給されるアノードと、空気ブロア１５を通じて酸化剤ガスが供給されるカソードと、アノードとカソードとの間の電解質とを有しており、燃料ガス及び酸化剤ガスを反応させて発電する。 The fuel gas generated by the reformer 28 is supplied to the fuel cell module 23 through the fuel gas supply path 33. The fuel gas is distributed and supplied to a plurality of fuel cell cells A constituting the fuel cell module 23. Each fuel cell A has an anode to which the fuel gas is supplied, a cathode to which the oxidant gas is supplied through the air blower 15, and an electrolyte between the anode and the cathode, and the fuel gas and the oxidant. It reacts with gas to generate electricity.

インバータ３９は、燃料電池モジュール２３において発電された出力電圧を調整し、商用系統（図示せず）から受電する電力と同じ電圧及び同じ周波数にする。 The inverter 39 adjusts the output voltage generated by the fuel cell module 23 to the same voltage and frequency as the electric power received from the commercial system (not shown).

燃焼部２９には、燃料電池モジュール２３における発電反応に用いられずに排出される燃料成分ガスを含む未燃ガスが供給される。燃焼部２９は、供給された未燃ガスを燃焼する。燃焼部２９からは、未燃ガスの燃焼により生じたセル燃焼排ガス（燃焼排ガスの一例）が排出される。 The combustion unit 29 is supplied with unburned gas containing fuel component gas that is discharged without being used in the power generation reaction in the fuel cell module 23. The combustion unit 29 burns the supplied unburned gas. Cell combustion exhaust gas (an example of combustion exhaust gas) generated by combustion of unburned gas is discharged from the combustion unit 29.

セル燃焼排ガスは改質器２８に供給されるとともに、燃焼触媒部３５を介してガス出口３７から収納容器４０の外部に排出される。改質器２８は、前述の通り、セル燃焼排ガスの熱、つまり燃料成分ガスの燃焼により生じた燃焼熱を用いて水蒸気改質を行う。 The cell combustion exhaust gas is supplied to the reformer 28 and discharged to the outside of the storage container 40 from the gas outlet 37 via the combustion catalyst section 35. As described above, the reformer 28 performs steam reforming using the heat of the cell combustion exhaust gas, that is, the combustion heat generated by the combustion of the fuel component gas.

ガス出口３７には、燃焼触媒部３５が配置され、セル燃焼排ガスに含有される一酸化炭素や水素等の還元性成分である未燃ガスを燃焼除去する。燃焼触媒部３５は、例えば、白金系触媒等から構成されている。 A combustion catalyst unit 35 is arranged at the gas outlet 37 to burn and remove unburned gas which is a reducing component such as carbon monoxide and hydrogen contained in the cell combustion exhaust gas. The combustion catalyst unit 35 is composed of, for example, a platinum-based catalyst or the like.

ガス出口３７からは、燃焼触媒部３５での未燃ガスの燃焼により生じた触媒燃焼排ガス（燃焼排ガスの一例）が排出される。触媒燃焼排ガスは、排出路５２を介して熱交換器１７に送られる。 From the gas outlet 37, catalyst combustion exhaust gas (an example of combustion exhaust gas) generated by combustion of unburned gas in the combustion catalyst section 35 is discharged. The catalyst combustion exhaust gas is sent to the heat exchanger 17 via the discharge path 52.

燃料電池発電装置１の各部には温度及び電圧を検出するための各種検出部が設けられてる。本実施形態では、燃料電池セルＡにおける温度を検出するためのセル温度検出部Ｔ１と、燃焼部２９におけるセル燃焼排ガスの温度を検出するための燃焼部温度検出部Ｔ２と、燃焼触媒部３５における触媒燃焼排ガスの温度を検出するための触媒温度検出部Ｔ３と、燃料電池セルＡにおける発電電圧を検出するための電圧検出部Ｖとを備えている。これらの検出部の検出結果は、運転制御部７１に送信される。 Each part of the fuel cell power generation device 1 is provided with various detection parts for detecting temperature and voltage. In the present embodiment, the cell temperature detection unit T1 for detecting the temperature in the fuel cell A, the combustion unit temperature detection unit T2 for detecting the temperature of the cell combustion exhaust gas in the combustion unit 29, and the combustion catalyst unit 35. It includes a catalyst temperature detection unit T3 for detecting the temperature of the catalyst combustion exhaust gas, and a voltage detection unit V for detecting the power generation voltage in the fuel cell A. The detection results of these detection units are transmitted to the operation control unit 71.

熱交換器１７では、ガス出口３７から排出される触媒燃焼排ガスと、貯湯タンク１９から排出される熱媒との間で熱交換が行われる。例えば、熱媒が水である場合、触媒燃焼排ガスと水との間で熱交換が行われ温水が生成され、貯湯タンク１９に収容される。触媒燃焼排ガスは、水との熱交換により温度が低下した状態で排出路５１に排出される。熱交換器１７を出た熱媒は、熱媒循環路６１に排出され貯湯タンク１９に導入される。さらに、貯湯タンク１９を出た熱媒循環路６１を通流して再び熱交換器１７に導入される。よって、熱媒循環路６１によって、熱交換器１７と貯湯タンク１９との間で熱媒が循環する。 In the heat exchanger 17, heat exchange is performed between the catalyst combustion exhaust gas discharged from the gas outlet 37 and the heat medium discharged from the hot water storage tank 19. For example, when the heat medium is water, heat exchange is performed between the catalyst combustion exhaust gas and water to generate hot water, which is stored in the hot water storage tank 19. The catalyst combustion exhaust gas is discharged to the discharge path 51 in a state where the temperature is lowered by heat exchange with water. The heat medium exiting the heat exchanger 17 is discharged to the heat medium circulation path 61 and introduced into the hot water storage tank 19. Further, the heat medium circulation path 61 exiting the hot water storage tank 19 is passed through and introduced into the heat exchanger 17 again. Therefore, the heat medium circulates between the heat exchanger 17 and the hot water storage tank 19 through the heat medium circulation path 61.

なお、貯湯タンク１９には、貯湯タンク１９中の湯水を出湯するための出湯路１９ａ、及び、湯水の出湯に応じて貯湯タンク１９に給水するための給水路１９ｂが設けられている。貯湯タンク１９に収容された温水は、お風呂及び洗面等への供給に用いることが可能であり、燃料電池発電装置１からの触媒燃焼排ガスの排熱を再利用することができる。 The hot water storage tank 19 is provided with a hot water passage 19a for discharging the hot water in the hot water storage tank 19 and a water supply passage 19b for supplying water to the hot water storage tank 19 according to the hot water discharge. The hot water stored in the hot water storage tank 19 can be used for supplying to a bath, a washbasin, or the like, and the waste heat of the catalyst combustion exhaust gas from the fuel cell power generation device 1 can be reused.

また、熱媒循環路６１には、循環ポンプ６３と、ラジエータ６５とが備えられている。循環ポンプ６３は、回転数を制御し、所望の回転数で貯湯タンク１９からの熱媒を熱交換器１７に供給する。ラジエータ６５は、熱媒循環路６１を通流する熱媒の熱を放熱させるための放熱ファン６５ａと、図示しない温度センサとを有する。 Further, the heat medium circulation path 61 is provided with a circulation pump 63 and a radiator 65. The circulation pump 63 controls the rotation speed and supplies the heat medium from the hot water storage tank 19 to the heat exchanger 17 at a desired rotation speed. The radiator 65 includes a heat radiating fan 65a for dissipating heat from the heat medium passing through the heat medium circulation path 61, and a temperature sensor (not shown).

（１−２）燃料電池モジュールの構成とシール部材
次に、燃料電池モジュール２３の構成について説明する。以下では、燃料電池モジュール２３として、円筒平板型の燃料電池モジュール、平板型の燃料電池モジュール及び円筒型の燃料電池モジュールを例に挙げて説明する。
また、燃料電池モジュール２３には、燃料ガス及び酸化剤ガス等の各種ガスの漏洩を防ぐためのシール部材が設けられているが、各燃料電池モジュールの構成の説明とともにシール部材の構成についても説明する。 (1-2) Configuration of Fuel Cell Module and Seal Member Next, the configuration of the fuel cell module 23 will be described. Hereinafter, as the fuel cell module 23, a cylindrical flat plate type fuel cell module, a flat plate type fuel cell module, and a cylindrical fuel cell module will be described as examples.
Further, although the fuel cell module 23 is provided with a sealing member for preventing leakage of various gases such as fuel gas and oxidant gas, the configuration of each fuel cell module and the configuration of the sealing member will be explained. do.

（ａ）円筒平板型の燃料電池モジュール
円筒平板型の燃料電池モジュール２３について図２〜図５を用いて説明する。
円筒平板型の燃料電池モジュール２３は、複数の円筒平板型の燃料電池セルＡと、集電部材２１３と、導電部材２１４と、電流引き出し部２１５と、燃料ガスが導入されるマニホールドＭとを有している。複数の円筒平板型の燃料電池セルＡは、集電部材２１３を介して互いに平行に配置されており、マニホールドＭから立設するように設けられている。導電部材２１４は、複数の燃料電池セルＡ及び集電部材２１３を挟持するように、燃料電池セルＡの配置方向の両端に設けられている。電流引き出し部２１５は導電部材２１４に接続されており、燃料電池セルＡの発電により生じる電流を取り出す。 (A) Cylindrical flat plate type fuel cell module The cylindrical flat plate type fuel cell module 23 will be described with reference to FIGS. 2 to 5.
The cylindrical flat plate type fuel cell module 23 includes a plurality of cylindrical flat plate type fuel cell A, a current collecting member 213, a conductive member 214, a current extraction portion 215, and a manifold M into which fuel gas is introduced. doing. The plurality of cylindrical flat plate type fuel cell A are arranged in parallel with each other via the current collector member 213, and are provided so as to stand upright from the manifold M. The conductive members 214 are provided at both ends of the fuel cell A in the arrangement direction so as to sandwich the plurality of fuel cell A and the current collector member 213. The current drawing unit 215 is connected to the conductive member 214, and draws out the current generated by the power generation of the fuel cell A.

燃料電池セルＡは、円筒平板形状に形成されており、導電性部材２０１と、燃料極層２０３と、電解質層２０４と、中間層２０５と、空気極層２０６と、密着層２０７と、インターコネクタ２０８とを有する。導電性部材２０１には、燃料電池セルＡの立設している方向に沿って導電性部材２０１を貫通する燃料ガス流路２０２が設けられている。燃料ガス流路２０２には、マニホールドＭから供給される燃料ガスが通流する。 The fuel cell A is formed in a cylindrical flat plate shape, and has a conductive member 201, a fuel electrode layer 203, an electrolyte layer 204, an intermediate layer 205, an air electrode layer 206, an adhesion layer 207, and an interconnector. It has 208 and. The conductive member 201 is provided with a fuel gas flow path 202 that penetrates the conductive member 201 along the direction in which the fuel cell A is erected. The fuel gas supplied from the manifold M flows through the fuel gas flow path 202.

隣接する燃料電池セルＡの一方側には、導電性部材２０１から外側に向かって、燃料極層２０３、電解質層２０４、中間層２０５、空気極層２０６が順に積層されている。燃料極層２０３及び電解質層２０４は、隣接する燃料電池セルＡの他方側の一部にまで延びて形成されている。そして、隣接する燃料電池セルＡの他方側における燃料極層２０３及び電解質層２０４が形成されていない部分には、密着層２０７を介してインターコネクタ２０８が形成されている。 On one side of the adjacent fuel cell A, the fuel electrode layer 203, the electrolyte layer 204, the intermediate layer 205, and the air electrode layer 206 are laminated in this order from the conductive member 201 toward the outside. The fuel electrode layer 203 and the electrolyte layer 204 are formed so as to extend to a part of the other side of the adjacent fuel cell A. An interconnector 208 is formed on the other side of the adjacent fuel cell A via the close contact layer 207 at a portion where the fuel electrode layer 203 and the electrolyte layer 204 are not formed.

以上のような円筒平板型の燃料電池モジュール２３において、シール部材８０は、例えば図４、図５に示すように、マニホールドＭに連通するように立設された燃料電池セルＡとマニホールドＭとの接合部分に塗布されている。図４、図５の例では、マニホールドＭの上面にシール部材８０が塗布されており、燃料電池セルＡとマニホールドＭとの接合部分がシール部材８０により封止されている。このように燃料電池セルＡとマニホールドＭとの接合部分にシール部材８０を配置することで、燃料ガス等の漏洩を抑制することができる。 In the cylindrical flat plate type fuel cell module 23 as described above, the seal member 80 is a fuel cell A and a manifold M erected so as to communicate with the manifold M, for example, as shown in FIGS. 4 and 5. It is applied to the joint part. In the examples of FIGS. 4 and 5, the sealing member 80 is applied to the upper surface of the manifold M, and the joint portion between the fuel cell A and the manifold M is sealed by the sealing member 80. By arranging the seal member 80 at the joint portion between the fuel cell A and the manifold M in this way, leakage of fuel gas or the like can be suppressed.

本実施形態のシール部材８０は、図５に示すように、第１部材８１により構成されている。第１部材８１は、燃料電池セルＡの通常の運転時の第１部材８１のシール温度（後述の第１運転モードでの例えば５００〜６５０℃のシール温度）より高温であり、かつ後述の第２部材８３の第２軟化点温度よりも高い第１軟化点温度を有する材料からなる。つまり、例えば、燃料電池セルＡの通常の運転温度は７００〜７５０℃であるが、通常の運転時の第１部材８１のシール温度は５００〜６５０℃になっている。そして、燃料電池セルＡが通常の運転温度（例えば７００〜７５０℃）より高温の運転温度（例えば７８０〜９００℃）に制御された場合、第１部材８１のシール温度は７００℃以上となる。第１軟化点温度は、燃料電池セルＡが高温（例えば７８０〜９００℃）に制御された場合においても第１部材８１が溶融しない温度である。なお、第１軟化点温度以上とは、例えば９００℃を超える温度である。
よって、燃料電池セルＡが通常の運転温度で運転されている場合においては第１部材８１は溶融しない。そのため、燃料電池セルＡが通常の運転で発電を行っている場合はシール部材８０は溶融せず形状等を保持しており、燃料ガス等の漏洩を抑制する。 As shown in FIG. 5, the seal member 80 of the present embodiment is composed of the first member 81. The first member 81 is higher than the seal temperature of the first member 81 during normal operation of the fuel cell A (for example, the seal temperature of 500 to 650 ° C. in the first operation mode described later), and is described later. The two members 83 are made of a material having a first softening point temperature higher than the second softening point temperature. That is, for example, the normal operating temperature of the fuel cell A is 700 to 750 ° C., but the seal temperature of the first member 81 during normal operation is 500 to 650 ° C. When the fuel cell A is controlled to an operating temperature (for example, 780 to 900 ° C.) higher than the normal operating temperature (for example, 700 to 750 ° C.), the sealing temperature of the first member 81 becomes 700 ° C. or higher. The first softening point temperature is a temperature at which the first member 81 does not melt even when the fuel cell A is controlled to a high temperature (for example, 780 to 900 ° C.). The temperature above the first softening point temperature is, for example, a temperature exceeding 900 ° C.
Therefore, when the fuel cell A is operated at a normal operating temperature, the first member 81 does not melt. Therefore, when the fuel cell A is generating electricity in normal operation, the seal member 80 does not melt and retains its shape or the like, thereby suppressing leakage of fuel gas or the like.

例えば、円筒平板型の燃料電池モジュール２３において、図６に示すように燃料電池セルＡとマニホールドＭとの接合部分のシール部材８０を構成する第１部材８１に破損部分８５が生じたとする。この場合、マニホールドＭから燃料ガスが漏洩する。そこで、本実施形態では、図７に示すように、第１部材８１の上方に滴下等により第２部材８３を配置させる。第２部材８３は、燃料電池セルＡの通常の運転時の第２部材８３のシール温度（後述の第１運転モードでの例えば５００〜６５０℃のシール温度）より高温（例えば７００℃以上）である第２軟化点温度を有する材料からなる。つまり、例えば、燃料電池セルＡの通常の運転温度は７００〜７５０℃であるが、通常の運転時の第２部材８３のシール温度は５００〜６５０℃になっている。そして、燃料電池セルＡが通常の運転温度（例えば７００〜７５０℃）より高温の運転温度（例えば７８０〜９００℃）に制御された場合、第２部材８３のシール温度は７００℃以上となり第２部材８３は溶融可能となる。このように第２軟化点温度は、燃料電池セルＡが高温（例えば７８０〜９００℃）に制御された場合において第２部材８３が溶融可能な温度である。なお、第１部材８１は、前述の通り第２軟化点温度より高温である第１軟化点温度（例えば９００℃を超える温度）を有する材料からなる。 For example, in the cylindrical flat plate type fuel cell module 23, it is assumed that a damaged portion 85 occurs in the first member 81 constituting the seal member 80 of the joint portion between the fuel cell A and the manifold M as shown in FIG. In this case, fuel gas leaks from the manifold M. Therefore, in the present embodiment, as shown in FIG. 7, the second member 83 is arranged above the first member 81 by dropping or the like. The second member 83 is at a temperature (for example, 700 ° C. or higher) higher than the seal temperature of the second member 83 during normal operation of the fuel cell A (for example, a seal temperature of 500 to 650 ° C. in the first operation mode described later). It consists of a material having a second softening point temperature. That is, for example, the normal operating temperature of the fuel cell A is 700 to 750 ° C., but the seal temperature of the second member 83 during normal operation is 500 to 650 ° C. When the fuel cell A is controlled to an operating temperature (for example, 780 to 900 ° C.) higher than the normal operating temperature (for example, 700 to 750 ° C.), the sealing temperature of the second member 83 becomes 700 ° C. or higher, and the second member The member 83 can be melted. As described above, the second softening point temperature is a temperature at which the second member 83 can be melted when the fuel cell A is controlled to a high temperature (for example, 780 to 900 ° C.). The first member 81 is made of a material having a first softening point temperature (for example, a temperature exceeding 900 ° C.), which is higher than the second softening point temperature as described above.

このような第１部材８１に第２部材８３を配置した後、通常の運転温度（第１運転モードでの通常の運転温度）よりも高温（第２運転モードでの高温）で燃料電池セルＡを運転し、第２軟化点温度以上第１軟化点温度未満（例えば６５０〜８５０℃）で第１部材８１及び第２部材８３を加熱する。この場合、第１部材８１及び第２部材８３のシール温度は第１軟化点温度未満であるため、第１部材８１は溶融しない。一方、第１部材８１及び第２部材８３のシール温度は第２軟化点温度以上であるため、第２部材８３は溶融する。よって、第１部材８１にひび及び剥がれ等の破損が生じた場合、前述のように加熱することで第１部材８１は溶融せずそのままの形状を維持するが、図８に示すように第２部材８３が溶融して第１部材８１の破損部分８５を埋め合わせて修復する。図７、図８では、溶融する第２部材８３が第１部材８１の上方に配置されているため、第１部材８１及び第２部材８３を前述のように加熱することで第１部材８１の上方の第２部材８３が溶融して重力により第１部材８１の破損部分８５に入り込む。これにより、第１部材８１の破損部分８５が第２部材８３により埋め合わされて修復できる。よって、第１部材８１が破損した場合であっても修復することで、接合部分を封止して燃料ガス等の漏洩を抑制することができる。 After arranging the second member 83 on the first member 81, the fuel cell A is at a temperature higher than the normal operating temperature (normal operating temperature in the first operating mode) (high temperature in the second operating mode). The first member 81 and the second member 83 are heated at a temperature equal to or higher than the second softening point temperature and lower than the first softening point temperature (for example, 650 to 850 ° C.). In this case, since the sealing temperature of the first member 81 and the second member 83 is lower than the first softening point temperature, the first member 81 does not melt. On the other hand, since the sealing temperature of the first member 81 and the second member 83 is equal to or higher than the second softening point temperature, the second member 83 melts. Therefore, when the first member 81 is damaged such as cracked or peeled off, the first member 81 is not melted and maintains its original shape by heating as described above, but as shown in FIG. 8, the second member 81 is maintained in its original shape. The member 83 melts to make up for and repair the damaged portion 85 of the first member 81. In FIGS. 7 and 8, since the second member 83 to be melted is arranged above the first member 81, the first member 81 and the second member 83 are heated as described above to form the first member 81. The upper second member 83 melts and enters the damaged portion 85 of the first member 81 due to gravity. As a result, the damaged portion 85 of the first member 81 can be compensated and repaired by the second member 83. Therefore, even if the first member 81 is damaged, by repairing it, the joint portion can be sealed and leakage of fuel gas or the like can be suppressed.

上記の通り第１部材８１に破損が生じた場合、第１部材８１に第２部材８３を適用し、第１部材８１及び第２部材８３のシール温度が第２軟化点温度以上第１軟化点温度未満となるように高温（第２運転モードの高温）で燃料電池セルＡを運転することで、第１部材８１は溶融させず第２部材８３を溶融して流動状態とすることで第１部材８１の破損部分８５を修復する。この場合、燃料電池セルＡを高温にすることで第２部材８３を溶融してある程度流動状態にするものの、第２部材８３の溶融が進み過ぎて接合部分から流れ出してしまうことや、材料の一部が揮発してしまうことを抑制する必要がある。これらの点を考慮して、第１部材８１及び第２部材８３の材料を適宜選択するのが好ましい。 When the first member 81 is damaged as described above, the second member 83 is applied to the first member 81, and the sealing temperature of the first member 81 and the second member 83 is equal to or higher than the second softening point temperature. By operating the fuel cell A at a high temperature (high temperature in the second operation mode) so as to be lower than the temperature, the first member 81 is not melted and the second member 83 is melted to be in a fluid state. The damaged portion 85 of the member 81 is repaired. In this case, although the fuel cell A is heated to a high temperature to melt the second member 83 and bring it into a fluid state to some extent, the second member 83 may melt too much and flow out from the joint portion, or one of the materials. It is necessary to prevent the part from volatilizing. In consideration of these points, it is preferable to appropriately select the materials of the first member 81 and the second member 83.

例えば、第１部材８１の第１軟化点温度及び第２部材８３の第２軟化点温度は、通常の運転温度（例えば７００〜７５０℃）における第１部材８１及び第２部材８３のシール温度よりも３０℃以上高いと好ましく、１００℃以上高いとさらに好ましい。これにより、第１部材８１は燃料電池セルＡの通常の運転温度では溶融せず形状を維持でき封止機能を安定的に提供する。第２部材８３は、通常の運転温度では溶融しないため、第２軟化点温度以上の運転温度とすることで第２部材８３の溶融を制御することができる。 For example, the first softening point temperature of the first member 81 and the second softening point temperature of the second member 83 are higher than the sealing temperatures of the first member 81 and the second member 83 at the normal operating temperature (for example, 700 to 750 ° C.). Is preferably 30 ° C. or higher, and more preferably 100 ° C. or higher. As a result, the first member 81 does not melt at the normal operating temperature of the fuel cell A, can maintain its shape, and stably provides the sealing function. Since the second member 83 does not melt at the normal operating temperature, the melting of the second member 83 can be controlled by setting the operating temperature to be equal to or higher than the second softening point temperature.

また、第１部材８１の第１軟化点温度は第２部材８３の第２軟化点温度よりも６０℃以上高いと好ましく、１５０℃以上高いとさらに好ましい。これにより、第１部材８１及び第２部材８３が第２軟化点温度以上第１軟化点温度未満となる温度で燃料電池セルＡを運転することで、第１部材８１の形状を維持したままで第２部材８３を溶融させ、溶融した第２部材８３により第１部材８１の破損部分８５を埋め合わせて修復できる。 Further, the first softening point temperature of the first member 81 is preferably 60 ° C. or higher higher than the second softening point temperature of the second member 83, and more preferably 150 ° C. or higher. As a result, by operating the fuel cell A at a temperature at which the first member 81 and the second member 83 are equal to or higher than the second softening point temperature and lower than the first softening point temperature, the shape of the first member 81 is maintained. The second member 83 is melted, and the melted second member 83 can make up for and repair the damaged portion 85 of the first member 81.

また、第１部材８１の材料は等方性材料であるのが好ましい。これにより、シール部材８０の異方的な熱膨張によって生じる応力を抑制でき、また応力のかかる方位による強度ばらつきも抑えられるため、第１部材８１の強度が部分的に小さくなることを抑制でき、接合部分を強固に封止できるなど安定なシール部材８０を得ることができる。また、第２部材８３の材料も等方性材料であるのが好ましい。第１部材８１の破損部分８５を等方性材料の第２部材８３で修復できるため部分的に強度が小さくなることを抑制できる。 Further, the material of the first member 81 is preferably an isotropic material. As a result, the stress caused by the anisotropic thermal expansion of the seal member 80 can be suppressed, and the strength variation depending on the direction in which the stress is applied can be suppressed, so that the strength of the first member 81 can be suppressed to be partially reduced. It is possible to obtain a stable sealing member 80 such that the joint portion can be firmly sealed. Further, the material of the second member 83 is also preferably an isotropic material. Since the damaged portion 85 of the first member 81 can be repaired by the second member 83 made of an isotropic material, it is possible to suppress a partial decrease in strength.

このようなシール部材８０に用いることができる材料としては、例えばＳｉＯ２−Ｂ２Ｏ３系、ＳｉＯ２−ＣａＯ系、ＭｇＯ−Ｂ２Ｏ３系等の非晶質ガラス及び結晶化ガラス、α−アルミナに代表されるような耐熱セラミックス粒子などのフィラーによって形状保持させたガラス等を用いることができる。第１部材８１としては、これらの材料等から第１軟化点温度を満たす材料が選択される。同様に、第２部材８３としては、これらの材料等から第２軟化点温度を満たす材料が選択される。
なお、結晶化ガラスとは、例えば、全体積に対して、結晶相が占める体積が６０％以上であり、非晶質相等が占める体積が４０％未満のガラスである。 Materials that can be used for such a sealing member 80 include amorphous glass and crystallized glass such as SiO 2- B 2 O 3 series, SiO 2- CaO series, and Mg O -B 2 O 3 series, α. -Glass or the like whose shape is maintained by a filler such as heat-resistant ceramic particles typified by alumina can be used. As the first member 81, a material satisfying the first softening point temperature is selected from these materials and the like. Similarly, as the second member 83, a material satisfying the second softening point temperature is selected from these materials and the like.
The crystallized glass is, for example, a glass in which the volume occupied by the crystal phase is 60% or more and the volume occupied by the amorphous phase or the like is less than 40% with respect to the total volume.

（ｂ）平板型の燃料電池モジュール
平板型の燃料電池モジュール２３について図９〜図１１を用いて説明する。
平板型の燃料電池モジュール２３は、燃料電池セルＡを収容する第１セパレータ１０１と、燃料ガス及び酸化剤ガスを燃料電池セルＡの平面に供給するための溝１０３ａ、１０３ｂが形成された第２セパレータ１０３とが、交互にＺ方向に積層されて構成されている。 (B) Flat plate type fuel cell module The flat plate type fuel cell module 23 will be described with reference to FIGS. 9 to 11.
The flat plate type fuel cell module 23 is formed with a first separator 101 for accommodating the fuel cell A and grooves 103a and 103b for supplying the fuel gas and the oxidizing agent gas to the flat surface of the fuel cell A. The separator 103 and the separator 103 are alternately laminated in the Z direction.

燃料電池セルＡは、第１セパレータ１０１の中央部に収容されている。燃料電池セルＡは、Ｚ方向の下方から上方に向かって空気極層１１５、電解質層１１３及び燃料極層１１１が順に積層されるともに、燃料極層１１１上に集電部材１１７が積層されて形成されている。第１セパレータ１０１は、この燃料電池セルＡの上面及び下面を露出するように中央部に開口が形成されている。 The fuel cell A is housed in the central portion of the first separator 101. The fuel cell A is formed by laminating the air electrode layer 115, the electrolyte layer 113, and the fuel electrode layer 111 in this order from the lower side to the upper side in the Z direction, and by laminating the current collecting member 117 on the fuel electrode layer 111. Has been done. The first separator 101 is formed with an opening at the center so as to expose the upper surface and the lower surface of the fuel cell A.

第２セパレータ１０３は、第１セパレータ１０１において燃料電池セルＡが配置されている中央部に対応する位置に、溝１０３ａ及び溝１０３ｂを有する。溝１０３ａは、燃料ガスを燃料電池セルＡの燃料極層１１１に供給するために、第２セパレータ１０３の下面に形成されている。つまり、図９によると、第１セパレータ１０１の燃料極層１１１側に対向する第２セパレータ１０３において、その下面の溝１０３ａが燃料極層１１１に対応している。本実施形態では、溝１０３ａは、図９中のＸ方向に沿って延びて形成されている。また、溝１０３ａは、Ｙ方向に離隔して４本形成されている。 The second separator 103 has a groove 103a and a groove 103b at positions corresponding to the central portion where the fuel cell A is arranged in the first separator 101. The groove 103a is formed on the lower surface of the second separator 103 in order to supply the fuel gas to the fuel electrode layer 111 of the fuel cell A. That is, according to FIG. 9, in the second separator 103 facing the fuel electrode layer 111 side of the first separator 101, the groove 103a on the lower surface thereof corresponds to the fuel electrode layer 111. In the present embodiment, the groove 103a is formed so as to extend along the X direction in FIG. Further, four grooves 103a are formed so as to be separated in the Y direction.

一方、溝１０３ｂは、空気極層１１５に酸化剤ガスを供給するために、第２セパレータ１０３の上面に形成されている。つまり、図９によると、第１セパレータ１０１の空気極層１１５側に対向する第２セパレータ１０３において、その上面の溝１０３ｂが空気極層１１５に対応している。本実施形態では、溝１０３ｂは、図９中のＹ方向に沿って延びて形成されている。また、溝１０３ｂは、Ｘ方向に離隔して４本形成されている。なお、溝１０３ａと溝１０３ｂとは互いに所定の間隔をおいて隔離して形成されている。 On the other hand, the groove 103b is formed on the upper surface of the second separator 103 in order to supply the oxidizing agent gas to the air electrode layer 115. That is, according to FIG. 9, in the second separator 103 facing the air electrode layer 115 side of the first separator 101, the groove 103b on the upper surface corresponds to the air electrode layer 115. In the present embodiment, the groove 103b is formed so as to extend along the Y direction in FIG. Further, four grooves 103b are formed so as to be separated from each other in the X direction. The groove 103a and the groove 103b are formed so as to be separated from each other at a predetermined distance.

第２セパレータ１０３の溝１０３ａ及び溝１０３ｂそれぞれに燃料ガス及び酸化剤ガスを通流させるために、積層された第１セパレータ１０１及び第２セパレータ１０３を貫通する開口が周縁に形成されている。この開口には、燃料ガスを供給するための開口と、酸化剤ガスを供給するための開口とが含まれる。具体的に、開口としては、燃料ガスを燃料電池セルＡに供給するための燃料ガス供給路１２１ｉｎと、燃料電池セルＡで発電に用いられなかった燃料ガスを排出する燃料ガス排出路１２１ｏｕｔと、酸化剤ガスを燃料電池セルＡに供給するための酸化剤ガス供給路１２３ｉｎと、燃料電池セルＡで発電に用いられなかった酸化剤ガスを排出する酸化剤ガス排出路１２３ｏｕｔとが設けられている。 In order to allow the fuel gas and the oxidant gas to flow through the grooves 103a and 103b of the second separator 103, openings penetrating the laminated first separator 101 and the second separator 103 are formed on the peripheral edge. This opening includes an opening for supplying a fuel gas and an opening for supplying an oxidant gas. Specifically, the openings include a fuel gas supply path 121in for supplying the fuel gas to the fuel cell A, and a fuel gas discharge path 121out for discharging the fuel gas not used for power generation in the fuel cell A. An oxidant gas supply path 123in for supplying the oxidant gas to the fuel cell A and an oxidant gas discharge path 123out for discharging the oxidant gas not used for power generation in the fuel cell A are provided. ..

燃料ガス供給路１２１ｉｎ及び燃料ガス排出路１２１ｏｕｔは、Ｘ方向に対向するように第１セパレータ１０１及び第２セパレータ１０３の周縁に形成されている。また、燃料ガス供給路１２１ｉｎと燃料ガス排出路１２１ｏｕｔとは溝１０３ａを介して連通している。そして、燃料ガスは、燃料電池モジュール２３の下方から供給され、燃料ガス供給路１２１ｉｎをＺ方向の上方に向かって通流するとともに（図９、図１０中のＦＧｉｎ）、溝１０３ａ内にも供給される。これにより、燃料極層１１１に燃料ガスが供給される。燃料電池セルＡで発電に用いられなかった燃料ガスは、溝１０３ａを通って燃料ガス排出路１２１ｏｕｔに導入される。排出された燃料ガスは、燃料ガス排出路１２１ｏｕｔをＺ方向の下方に向かって通流し（図９、図１０中のＦＧｏｕｔ）、燃料電池モジュール２３の外部に排出される。 The fuel gas supply path 121in and the fuel gas discharge path 121out are formed on the peripheral edges of the first separator 101 and the second separator 103 so as to face each other in the X direction. Further, the fuel gas supply path 121in and the fuel gas discharge path 121out communicate with each other through the groove 103a. Then, the fuel gas is supplied from below the fuel cell module 23, passes through the fuel gas supply path 121in upward in the Z direction (FGin in FIGS. 9 and 10), and is also supplied into the groove 103a. Will be done. As a result, the fuel gas is supplied to the fuel electrode layer 111. The fuel gas not used for power generation in the fuel cell A is introduced into the fuel gas discharge path 121out through the groove 103a. The discharged fuel gas passes through the fuel gas discharge path 121out downward in the Z direction (FGout in FIGS. 9 and 10), and is discharged to the outside of the fuel cell module 23.

酸化剤ガス供給路１２３ｉｎ及び酸化剤ガス排出路１２３ｏｕｔは、Ｙ方向に対向するように第１セパレータ１０１及び第２セパレータ１０３の周縁に形成されている。また、酸化剤ガス供給路１２３ｉｎと酸化剤ガス排出路１２３ｏｕｔとは溝１０３ｂを介して連通している。そして、酸化剤ガスは、燃料電池モジュール２３の下方から供給され、酸化剤ガス供給路１２３ｉｎをＺ方向の上方に向かって通流するとともに（図９、図１１中のＯＧｉｎ）、溝１０３ａ内にも供給される。これにより、空気極層１１５に酸化剤ガスが供給される。燃料電池セルＡで発電に用いられなかった酸化剤ガスは、溝１０３ｂを通って酸化剤ガス排出路１２３ｏｕｔに導入される。排出された酸化剤ガスは、酸化剤ガス排出路１２３ｏｕｔをＺ方向の下方に向かって通流し（図９、図１１中のＯＧｏｕｔ）、燃料電池モジュール２３の外部に排出される。 The oxidant gas supply path 123in and the oxidant gas discharge path 123out are formed on the peripheral edges of the first separator 101 and the second separator 103 so as to face each other in the Y direction. Further, the oxidant gas supply path 123in and the oxidant gas discharge path 123out communicate with each other through the groove 103b. Then, the oxidant gas is supplied from below the fuel cell module 23, passes through the oxidant gas supply path 123in upward in the Z direction (OGin in FIGS. 9 and 11), and enters the groove 103a. Is also supplied. As a result, the oxidant gas is supplied to the air electrode layer 115. The oxidant gas not used for power generation in the fuel cell A is introduced into the oxidant gas discharge path 123out through the groove 103b. The discharged oxidant gas passes through the oxidant gas discharge path 123out downward in the Z direction (OGout in FIGS. 9 and 11), and is discharged to the outside of the fuel cell module 23.

以上のような平板型の燃料電池モジュール２３において、シール部材８０は、例えば図１０、図１１に示すように、燃料電池セルＡと第１セパレータ１０１との接合部分（シール部材８０ａ）、第１セパレータ１０１と第２セパレータとの接合部分（シール部材８０ｂ）に配置されている。このようにシール部材８０を配置することで、燃料ガス等の漏洩を抑制することができる。 In the flat plate type fuel cell module 23 as described above, the seal member 80 is a joint portion (seal member 80a) between the fuel cell A and the first separator 101, the first, as shown in FIGS. 10 and 11, for example. It is arranged at the joint portion (seal member 80b) between the separator 101 and the second separator. By arranging the seal member 80 in this way, leakage of fuel gas or the like can be suppressed.

図１２は、燃料電池セルＡと第１セパレータ１０１との接合部分に配置されたシール部材８０ａを示す拡大図である。本実施形態のシール部材８０は、図１２等に示すように、第１部材８１により構成されている。第１部材８１の材料は、上述したシール部材８０と同様である。 FIG. 12 is an enlarged view showing a seal member 80a arranged at a joint portion between the fuel cell A and the first separator 101. As shown in FIG. 12 and the like, the seal member 80 of the present embodiment is composed of the first member 81. The material of the first member 81 is the same as that of the seal member 80 described above.

例えば、平板型の燃料電池モジュール２３において、図１３に示すように第１部材８１に破損部分８５が生じたとする。この場合、燃料電池モジュール２３の外に燃料ガスが漏洩する。本実施形態では、図１４に示すように、第１部材８１の破損部分８５に、小型カメラ１５１付きの注射器１５０等による注入や、燃料ガス・空気ガス経路からの噴霧等により第２部材８３を配置させる。第２部材８３の材料は上述と同様である。このように第１部材８１に第２部材８３を配置した後、通常の運転温度（第１運転モードでの通常の運転温度）よりも高温（第２運転モードでの高温）の運転温度において燃料電池セルＡを運転することで、第１部材８１及び第２部材８３が第２軟化点温度以上第１軟化点温度未満となる。この場合、第１部材８１及び第２部材８３のシール温度は第１軟化点温度未満であるため、第１部材８１は溶融しない。一方、第１部材８１及び第２部材８３のシール温度は第２軟化点温度以上であるため、第２部材８３は溶融する。よって、第１部材８１にひび及び剥がれ等の破損が生じた場合、前述のように加熱することで第１部材８１は溶融せずそのままの形状を維持するが、図１５に示すように第２部材８３が溶融して第１部材８１の破損部分８５を埋め合わせて修復する。これにより、第１部材８１が破損した場合であっても、第１部材８１を修復することで燃料ガス等の漏洩を抑制することができる。 For example, in the flat plate type fuel cell module 23, it is assumed that the damaged portion 85 is generated in the first member 81 as shown in FIG. In this case, the fuel gas leaks out of the fuel cell module 23. In the present embodiment, as shown in FIG. 14, the second member 83 is injected into the damaged portion 85 of the first member 81 by a syringe 150 or the like equipped with a small camera 151, spraying from a fuel gas / air gas path, or the like. Place it. The material of the second member 83 is the same as described above. After arranging the second member 83 on the first member 81 in this way, the fuel is fueled at an operating temperature higher than the normal operating temperature (normal operating temperature in the first operating mode) (high temperature in the second operating mode). By operating the battery cell A, the first member 81 and the second member 83 become equal to or higher than the second softening point temperature and lower than the first softening point temperature. In this case, since the sealing temperature of the first member 81 and the second member 83 is lower than the first softening point temperature, the first member 81 does not melt. On the other hand, since the sealing temperature of the first member 81 and the second member 83 is equal to or higher than the second softening point temperature, the second member 83 melts. Therefore, when the first member 81 is damaged such as cracked or peeled off, the first member 81 is not melted and maintains its original shape by heating as described above, but as shown in FIG. 15, the second member 81 is second. The member 83 melts to make up for and repair the damaged portion 85 of the first member 81. As a result, even if the first member 81 is damaged, leakage of fuel gas or the like can be suppressed by repairing the first member 81.

なお、上記の図１３〜図１５では、シール部材８０ａの破損の修復について説明したが、シール部材８０ｂの破損についても同様に修復可能である。 Although the repair of the damage of the seal member 80a has been described in FIGS. 13 to 15 above, the damage of the seal member 80b can be repaired in the same manner.

（ｃ）円筒型の燃料電池モジュール
円筒型の燃料電池モジュール２３について図１６〜図１７を用いて説明する。
円筒型の燃料電池モジュール２３は、円筒状の燃料電池セルＡと、集電部材３１９と、燃料極側端子３２１と、空気極側端子３２５とを有している。燃料電池セルＡは、円筒状の内部から順に燃料極層３１１、電解質層３１３、空気極層３１５が順に積層されている。燃料電池セルＡの最も内面の燃料極層３１１は燃料ガスが通流する燃料ガス通流部３１７を構成している。集電部材３１９は、空気極層３１５の外面に接して設けられており、酸化剤ガスの供給を受ける。 (C) Cylindrical Fuel Cell Module The cylindrical fuel cell module 23 will be described with reference to FIGS. 16 to 17.
The cylindrical fuel cell module 23 has a cylindrical fuel cell A, a current collecting member 319, a fuel pole side terminal 321 and an air pole side terminal 325. In the fuel cell A, the fuel electrode layer 311, the electrolyte layer 313, and the air electrode layer 315 are laminated in this order from the inside of the cylinder. The innermost fuel electrode layer 311 of the fuel cell A constitutes a fuel gas passage portion 317 through which fuel gas passes. The current collector member 319 is provided in contact with the outer surface of the air electrode layer 315, and receives the supply of the oxidant gas.

電解質層３１３及び燃料極層３１１は、軸心方向において燃料電池セルＡから突出して形成されている。この突出した電解質層３１３及び燃料極層３１１に、燃料極側端子３２１が取り付けられている。一方、空気極層３１５の外面に設けられた集電部材３１９に、空気極側端子３２５が取り付けられている。燃料極側端子３２１には貫通孔３２１ａが設けられており、空気極側端子３２５には貫通孔３２５ａが設けられている。貫通孔３２１ａ、燃料ガス通流部３１７及び貫通孔３２５ａが連通しており、燃料ガスが通流する。 The electrolyte layer 313 and the fuel electrode layer 311 are formed so as to project from the fuel cell A in the axial direction. A fuel electrode side terminal 321 is attached to the protruding electrolyte layer 313 and the fuel electrode layer 311. On the other hand, the air electrode side terminal 325 is attached to the current collecting member 319 provided on the outer surface of the air electrode layer 315. The fuel pole side terminal 321 is provided with a through hole 321a, and the air pole side terminal 325 is provided with a through hole 325a. The through hole 321a, the fuel gas passage portion 317, and the through hole 325a communicate with each other, and the fuel gas flows through the through hole 321a.

以上のような円筒平板型の燃料電池モジュール２３において、シール部材８０は、例えば図１６、図１７に示すように燃料極側端子３２１と燃料電池セルＡから突出している電解質層３１３及び燃料極層３１１との接合部分、図１６に示すように空気極側端子３２５と空気極層３１５との接合部分に配置されている。このように燃料電池セルＡと端子との接合部分にシール部材８０を配置することで、燃料ガス等の漏洩を抑制することができる。本実施形態のシール部材８０は、図１６、図１７に示すように、第１部材８１により構成されている。第１部材８１の材料は、上述したシール部材８０と同様である。 In the cylindrical flat plate type fuel cell module 23 as described above, the seal member 80 is, for example, as shown in FIGS. 16 and 17, the fuel electrode side terminal 321 and the electrolyte layer 313 and the fuel electrode layer protruding from the fuel cell A. It is arranged at the joint portion with 311 and at the joint portion between the air electrode side terminal 325 and the air electrode layer 315 as shown in FIG. By arranging the seal member 80 at the joint portion between the fuel cell A and the terminal in this way, leakage of fuel gas or the like can be suppressed. As shown in FIGS. 16 and 17, the seal member 80 of the present embodiment is composed of the first member 81. The material of the first member 81 is the same as that of the seal member 80 described above.

例えば円筒型の燃料電池モジュール２３において、図１８に示すように燃料電池セルＡと燃料極側端子３２１との接合部分の第１部材８１に破損部分８５が生じたとする。この場合、燃料電池モジュール２３の外に燃料ガスが漏洩する。本実施形態では、図１９に示すように、第１部材８１の破損部分８５に、小型カメラ１５１付きの注射器１５０等による注入や、燃料ガス・空気ガス経路からの噴霧等により第２部材８３を配置させる。第２部材８３の材料は上述と同様である。このような第１部材８１に第２部材８３を配置した後、通常の運転温度（第１運転モードでの通常の運転温度）よりも高温（第２運転モードでの高温）の運転温度において燃料電池セルＡを運転することで、第１部材８１及び第２部材８３が第２軟化点温度以上第１軟化点温度未満となる。この場合、第１部材８１及び第２部材８３のシール温度は第１軟化点温度未満であるため、第１部材８１は溶融しない。一方、第１部材８１及び第２部材８３のシール温度は第２軟化点温度以上であるため、第２部材８３は溶融する。よって、第１部材８１にひび及び剥がれ等の破損が生じた場合、前述のように加熱することで第１部材８１は溶融せずそのままの形状を維持するが、図２０に示すように第２部材８３が溶融して第１部材８１の破損部分８５を埋め合わせて修復する。これにより、第１部材８１が破損した場合であっても、第１部材８１を修復することで燃料ガス等の漏洩を抑制することができる。 For example, in the cylindrical fuel cell module 23, it is assumed that a damaged portion 85 occurs in the first member 81 of the joint portion between the fuel cell A and the fuel electrode side terminal 321 as shown in FIG. In this case, the fuel gas leaks out of the fuel cell module 23. In the present embodiment, as shown in FIG. 19, the second member 83 is injected into the damaged portion 85 of the first member 81 by a syringe 150 or the like equipped with a small camera 151, spraying from a fuel gas / air gas path, or the like. Place it. The material of the second member 83 is the same as described above. After arranging the second member 83 on the first member 81, the fuel is fueled at an operating temperature higher than the normal operating temperature (normal operating temperature in the first operating mode) (high temperature in the second operating mode). By operating the battery cell A, the first member 81 and the second member 83 become equal to or higher than the second softening point temperature and lower than the first softening point temperature. In this case, since the sealing temperature of the first member 81 and the second member 83 is lower than the first softening point temperature, the first member 81 does not melt. On the other hand, since the sealing temperature of the first member 81 and the second member 83 is equal to or higher than the second softening point temperature, the second member 83 melts. Therefore, when the first member 81 is damaged such as cracked or peeled off, the first member 81 is not melted and maintains its original shape by heating as described above, but as shown in FIG. 20, the second member 81 is maintained in its original shape. The member 83 melts to make up for and repair the damaged portion 85 of the first member 81. As a result, even if the first member 81 is damaged, leakage of fuel gas or the like can be suppressed by repairing the first member 81.

（２）運転制御部が実行するシール部材の修復方法
上記の燃料電池システム１００の運転制御部７１は、シール部材８０を構成する第１部材８１が破損した場合に修復を行うための修復方法を実行する。
（２−１）修復方法の全体の流れ
まず、第１部材８１の修復方法の全体の流れについて説明する。
運転制御部７１は、通常の運転温度で燃料電池セルＡを運転するように制御する第１運転モードと、通常の運転温度よりも高温で燃料電池セルＡを運転するように制御する第２運転モードとを実行可能であり、所定のタイミングで第２運転モードを実行する。 (2) Repair Method of Seal Member Executed by Operation Control Unit The operation control unit 71 of the fuel cell system 100 described above provides a repair method for repairing when the first member 81 constituting the seal member 80 is damaged. Run.
(2-1) Overall Flow of Repair Method First, the overall flow of the repair method of the first member 81 will be described.
The operation control unit 71 has a first operation mode for controlling the operation of the fuel cell A at a normal operation temperature and a second operation for controlling the operation of the fuel cell A at a temperature higher than the normal operation temperature. The mode can be executed, and the second operation mode is executed at a predetermined timing.

第１運転モードは、例えば、燃料電池システム１００で発電された発電電力を負荷等に供給している通常運転を意味する。第１運転モードにおける通常の運転温度とは、通常運転の場合の燃料電池セルＡの温度である。通常の運転温度は、これに限定されないが、例えば７００〜７５０℃である。 The first operation mode means, for example, a normal operation in which the generated power generated by the fuel cell system 100 is supplied to a load or the like. The normal operating temperature in the first operation mode is the temperature of the fuel cell A in the case of normal operation. The normal operating temperature is, but is not limited to, 700 to 750 ° C., for example.

そして、運転制御部７１は、燃料ガス用ポンプ２を制御することによる燃料ガス供給量の制御、空気ブロア１５を制御することによる酸化剤ガス供給量の制御、改質水ポンプ７を制御することによる水蒸気量の制御等によって燃料電池セルＡの温度を制御する。なお、運転制御部７１は、セル温度検出部Ｔ１、燃焼部温度検出部Ｔ２、触媒温度検出部Ｔ３及び電圧検出部Ｖ等が検出した各種温度及び電圧等を参照し、燃料電池セルＡの温度を制御する。 Then, the operation control unit 71 controls the fuel gas supply amount by controlling the fuel gas pump 2, controls the oxidant gas supply amount by controlling the air blower 15, and controls the reforming water pump 7. The temperature of the fuel cell A is controlled by controlling the amount of water vapor and the like. The operation control unit 71 refers to various temperatures and voltages detected by the cell temperature detection unit T1, the combustion unit temperature detection unit T2, the catalyst temperature detection unit T3, the voltage detection unit V, and the like, and refers to the temperature of the fuel cell A. To control.

一方、第２運転モードは、第１運転モードとは異なり、第１部材８１の修復を行うための修復方法を実行する際の運転を意味する。第２運転モードにおける燃料電池セルＡの温度は、第１運転モードにおける通常の運転温度よりも高く、第２軟化点温度以上第１軟化点温度未満で第１部材８１及び第２部材８３を加熱可能であり、第１部材８１の修復のために配置された第２部材８３を溶融して第１部材８１を修復可能な温度である。第２運転モードの運転温度は、これに限定されないが、例えば７８０〜９００℃である。第２運転モードにおける運転温度の制御方法については後述する。 On the other hand, the second operation mode, unlike the first operation mode, means an operation when executing a repair method for repairing the first member 81. The temperature of the fuel cell A in the second operation mode is higher than the normal operation temperature in the first operation mode, and heats the first member 81 and the second member 83 at a temperature equal to or higher than the second softening point temperature and lower than the first softening point temperature. It is possible, and the temperature is such that the first member 81 can be repaired by melting the second member 83 arranged for repairing the first member 81. The operating temperature of the second operating mode is not limited to this, but is, for example, 780 to 900 ° C. The operation temperature control method in the second operation mode will be described later.

運転制御部７１は、上記の第１部材８１を修復するための第２運転モードを、所定のタイミングで実行する。所定のタイミングとは、任意のタイミングで第１部材８１に第２部材８３を適用したタイミングであってもよいし、定期的なタイミングで第１部材８１に第２部材８３を適用したタイミングであってもよい。その他、運転制御部７１は、燃料ガス等の漏洩が検出されたタイミングで第１部材８１に第２部材８３を適用したタイミングで第２運転モードを実行してもよい。第２運転モードを開始するタイミングについては後述する。 The operation control unit 71 executes a second operation mode for repairing the first member 81 at a predetermined timing. The predetermined timing may be the timing when the second member 83 is applied to the first member 81 at an arbitrary timing, or the timing when the second member 83 is applied to the first member 81 at a periodic timing. You may. In addition, the operation control unit 71 may execute the second operation mode at the timing when the second member 83 is applied to the first member 81 at the timing when the leakage of fuel gas or the like is detected. The timing for starting the second operation mode will be described later.

第２運転モードを開始した後、運転制御部７１は、任意のタイミングで第２運転モードを終了してもよいし、第２運転モードを所定期間実行した後に終了してもよい。その他、後述の通り燃料電池システム１００の状態に基づいて第２運転モードを終了してもよい。 After starting the second operation mode, the operation control unit 71 may end the second operation mode at an arbitrary timing, or may end after executing the second operation mode for a predetermined period. In addition, as described later, the second operation mode may be terminated based on the state of the fuel cell system 100.

以上のように第２運転モードの実行によって、第１部材８１に適用した第２部材８３が溶融して、第１部材８１の破損部分８５が第２部材８３により埋め合わされることで第１部材８１が修復される。これにより、シール部材８０を構成する第１部材８１が破損した場合であっても、第１部材８１を修復することで燃料ガス等の漏洩を抑制することができる。よって、燃料ガス等の漏洩による燃料電池セルＡにおける発電性能の低下を抑制でき、また、環境への悪影響も抑制できる。また、シール部材８０の修復を燃料電池セルの運転温度を調整することで行うことができる。 As described above, by executing the second operation mode, the second member 83 applied to the first member 81 is melted, and the damaged portion 85 of the first member 81 is filled with the second member 83, so that the first member 81 is repaired. As a result, even if the first member 81 constituting the seal member 80 is damaged, leakage of fuel gas or the like can be suppressed by repairing the first member 81. Therefore, it is possible to suppress a decrease in power generation performance in the fuel cell A due to leakage of fuel gas or the like, and it is also possible to suppress an adverse effect on the environment. Further, the seal member 80 can be repaired by adjusting the operating temperature of the fuel cell.

（２−２）第２運転モードにおける温度制御の例
第２運転モードでは、運転制御部７１は、第１運転モードでの通常の運転温度よりも高温であり、第１部材８１及び第２部材８３が第２軟化点温度以上第１軟化点温度未満となるように燃料電池セルＡの運転を制御する。以下では、第２運転モードにおける燃料電池セルＡを高温での運転に制御する方法の一例について説明する。 (2-2) Example of Temperature Control in Second Operation Mode In the second operation mode, the operation control unit 71 has a higher temperature than the normal operation temperature in the first operation mode, and the first member 81 and the second member The operation of the fuel cell A is controlled so that 83 is equal to or higher than the second softening point temperature and lower than the first softening point temperature. Hereinafter, an example of a method of controlling the fuel cell A to operate at a high temperature in the second operation mode will be described.

運転制御部７１は、第２運転モードにおいて、燃料ガス用ポンプ２を制御して燃料ガスの供給量を第１運転モードよりも増加させ、燃料電池セルＡの温度を上昇させる。燃料ガスの供給量の増加分に応じて燃焼量が増加する。これにより、燃料電池セルＡの温度を上昇させて高温で運転させることができる。 In the second operation mode, the operation control unit 71 controls the fuel gas pump 2 to increase the fuel gas supply amount as compared with the first operation mode, and raise the temperature of the fuel cell A. The amount of combustion increases according to the increase in the amount of fuel gas supplied. As a result, the temperature of the fuel cell A can be raised to operate at a high temperature.

運転制御部７１は、第２運転モードにおいて、空気ブロア１５を制御して酸化剤ガスの供給量を第１運転モードよりも減少させ、燃料電池セルＡの温度を上昇させる。酸化剤ガスの供給量を減少させると、燃料電池セルＡの冷却が抑制される。これにより、燃料電池セルＡの温度を上昇させて高温で運転させることができる。 In the second operation mode, the operation control unit 71 controls the air blower 15 to reduce the supply amount of the oxidant gas as compared with the first operation mode and raise the temperature of the fuel cell A. When the supply amount of the oxidant gas is reduced, the cooling of the fuel cell A is suppressed. As a result, the temperature of the fuel cell A can be raised to operate at a high temperature.

なお、運転制御部７１は、前述のように温度を上昇させるように制御した場合、セル温度検出部Ｔ１が検出する燃料電池セルＡの温度を監視しておき、所定の高温（第１部材８１及び第２部材８３が第２軟化点温度以上第１軟化点温度未満となる温度）まで温度を上昇させる制御を行う。そして、所定の高温まで燃料電池セルＡの温度が上昇すると、運転制御部７１は温度をさらに上昇させる制御を停止させることができる。 When the operation control unit 71 controls to raise the temperature as described above, the operation control unit 71 monitors the temperature of the fuel cell A detected by the cell temperature detection unit T1 and monitors a predetermined high temperature (first member 81). The temperature of the second member 83 is raised to the temperature at which the temperature is equal to or higher than the second softening point temperature and lower than the first softening point temperature). Then, when the temperature of the fuel cell A rises to a predetermined high temperature, the operation control unit 71 can stop the control for further raising the temperature.

また、運転制御部７１は、前述のように高温に制御する場合に、当該高温まで徐々に温度を上げるように制御することができる。これにより、急激な温度上昇による急激な熱応力の発生等による燃料電池セルＡの変形及び割れ等を抑制できる。 Further, when the operation control unit 71 controls the temperature to a high temperature as described above, the operation control unit 71 can control the temperature to be gradually raised to the high temperature. As a result, deformation and cracking of the fuel cell A due to the sudden generation of thermal stress due to a sudden temperature rise can be suppressed.

また、運転制御部７１は、燃料電池セルＡの発電性能が回復したか否かを見ながら徐々に温度を上昇させることができる。シール部材８０を構成する第１部材８１の破損によって燃料ガス等が漏洩している場合、燃料電池セルＡへの燃料ガス等の供給量が減り発電性能が低下する。そこで、運転制御部７１は、温度を所定の温度だけ上昇させたにも関わらず燃料電池セルＡの発電性能が低下したままで回復していない場合は、シール部材８０（第１部材８１）の破損が修復されていないとして、さらに温度を上昇させシール部材８０を溶融して修復可能なように制御する。この場合であっても、所定の高温（例えば９００℃）までで温度の上昇を停止させるのが、燃料電池セルＡの変形及び割れ等を防ぐ観点から好ましい。なお、運転制御部７１は、電圧検出部Ｖで検出される発電電圧が通常運転での発電電圧よりも低い場合、燃焼部温度検出部Ｔ２が検出したセル燃焼排ガスの温度が通常運転の場合よりも高いままである場合、触媒温度検出部Ｔ３が検出した触媒燃焼排ガスの温度が通常運転の場合よりも高いままである場合等には、シール部材８０の破損が修復されておらず、発電性能が回復していないと判断する。 Further, the operation control unit 71 can gradually raise the temperature while checking whether or not the power generation performance of the fuel cell A has been restored. When the fuel gas or the like leaks due to the damage of the first member 81 constituting the seal member 80, the supply amount of the fuel gas or the like to the fuel cell A decreases and the power generation performance deteriorates. Therefore, if the operation control unit 71 raises the temperature by a predetermined temperature but the power generation performance of the fuel cell A remains deteriorated and does not recover, the seal member 80 (first member 81) is used. Assuming that the damage has not been repaired, the temperature is further raised to melt the seal member 80 and control it so that it can be repaired. Even in this case, it is preferable to stop the temperature rise up to a predetermined high temperature (for example, 900 ° C.) from the viewpoint of preventing deformation and cracking of the fuel cell A. In the operation control unit 71, when the power generation voltage detected by the voltage detection unit V is lower than the power generation voltage in the normal operation, the temperature of the cell combustion exhaust gas detected by the combustion unit temperature detection unit T2 is higher than in the normal operation. If the temperature of the catalyst combustion exhaust gas detected by the catalyst temperature detection unit T3 remains higher than that in the normal operation, the damage to the seal member 80 has not been repaired and the power generation performance. Judges that has not recovered.

一方、運転制御部７１は、温度を所定の温度だけ上昇させたことで燃料電池セルＡの発電性能が回復した場合は、さらなる温度の上昇を停止させるか、通常運転の温度に戻すように制御する。なお、運転制御部７１は、電圧検出部Ｖで検出される発電電圧が通常運転での発電電圧と同程度かそれ以上の場合、燃焼部温度検出部Ｔ２が検出したセル燃焼排ガスの温度が通常運転の場合と同程度となった場合、触媒温度検出部Ｔ３が検出した触媒燃焼排ガスの温度が通常運転の場合と同程度となった場合等には、シール部材８０（第１部材８１）の破損が修復されて発電性能が回復していると判断する。 On the other hand, when the power generation performance of the fuel cell A is restored by raising the temperature by a predetermined temperature, the operation control unit 71 controls to stop the further temperature rise or return it to the normal operation temperature. do. In the operation control unit 71, when the power generation voltage detected by the voltage detection unit V is equal to or higher than the power generation voltage in normal operation, the temperature of the cell combustion exhaust gas detected by the combustion unit temperature detection unit T2 is normal. When the temperature of the catalyst combustion exhaust gas detected by the catalyst temperature detection unit T3 is about the same as that in the normal operation, the seal member 80 (first member 81) is used. It is judged that the damage has been repaired and the power generation performance has been restored.

なお、運転制御部７１は、徐々に温度を上昇させつつ燃料電池セルＡの発電性能を確認するにあたっては、例えば９００℃の高温で燃料電池セルＡを運転してシール部材８０（第１部材８１）を修復し、その後、一旦通常の運転温度に戻して燃料電池セルＡを運転し、通常の運転温度で燃料電池セルＡの発電性能を確認するのが好ましい。発電性能が確認できた後、発電性能が回復していない場合は、運転制御部７１は、先の温度よりも高温の例えば９２０℃の高温で燃料電池セルＡを運転させる。発電性能が回復している場合は、運転制御部７１は、通常の運転温度で燃料電池セルＡを運転する。 In order to confirm the power generation performance of the fuel cell A while gradually increasing the temperature, the operation control unit 71 operates the fuel cell A at a high temperature of, for example, 900 ° C. to operate the seal member 80 (first member 81). ) Is repaired, and then the fuel cell A is once returned to the normal operating temperature to operate the fuel cell A, and the power generation performance of the fuel cell A is confirmed at the normal operating temperature. After the power generation performance is confirmed, if the power generation performance is not recovered, the operation control unit 71 operates the fuel cell A at a temperature higher than the previous temperature, for example, 920 ° C. When the power generation performance is restored, the operation control unit 71 operates the fuel cell A at a normal operating temperature.

（２−３）第２運転モードの開始条件の例
第２運転モードは、第１部材８１の破損が生じ得るタイミングにおいて、第１部材８１に第２部材８３を適用した後に実行される。第１部材８１の破損が生じ得るタイミングとしては、例えば、任意のタイミング、定期的なタイミング、燃料ガス等の漏洩が検出されたタイミング等に設定されている。 (2-3) Example of Start Condition of Second Operation Mode The second operation mode is executed after applying the second member 83 to the first member 81 at a timing when the first member 81 may be damaged. The timing at which the first member 81 may be damaged is set to, for example, an arbitrary timing, a periodic timing, a timing at which leakage of fuel gas or the like is detected, or the like.

まず、第１部材８１に第２部材８３を適用するタイミングとして、任意のタイミング、定期的なタイミング、燃料ガス等の漏洩が検出されたタイミングで、運転制御部７１は、第１部材８１に第２部材８３を適用するようにユーザ等に報知する。報知は、例えば音声、画像等によって行われる。ユーザは、報知に基づいて、第１部材８１の破損部分８５に滴下、注入等の方法により第２部材８３を適用する。 First, as the timing for applying the second member 83 to the first member 81, at an arbitrary timing, a periodic timing, or a timing at which leakage of fuel gas or the like is detected, the operation control unit 71 first applies the second member 83 to the first member 81. 2 Notify the user or the like to apply the member 83. The notification is performed by, for example, voice, an image, or the like. Based on the notification, the user applies the second member 83 to the damaged portion 85 of the first member 81 by a method such as dropping or injecting.

あるいは、運転制御部７１は、任意のタイミング、定期的なタイミング、燃料ガス等の漏洩が検出されたタイミングで第１部材８１に第２部材８３を適用するように、図示しない補修装置に指令してもよい。補修装置は、例えば収納容器４０内に設けられており、燃料電池モジュール２３に対して自在に移動可能に構成されている。補修装置は、燃料電池モジュール２３において第１部材８１の配置位置を予め取得しており、任意のタイミング、定期的なタイミング、燃料ガス等の漏洩が検出されたタイミングで、予め取得している第１部材８１配置位置に基づいて、滴下、注入等の方法により第２部材８３を適用する。 Alternatively, the operation control unit 71 instructs a repair device (not shown) to apply the second member 83 to the first member 81 at an arbitrary timing, a periodic timing, or a timing when a leakage of fuel gas or the like is detected. You may. The repair device is provided in, for example, the storage container 40, and is configured to be freely movable with respect to the fuel cell module 23. The repair device has acquired the arrangement position of the first member 81 in the fuel cell module 23 in advance, and has acquired it in advance at an arbitrary timing, a periodic timing, and a timing when a leakage of fuel gas or the like is detected. Based on the arrangement position of the 1 member 81, the second member 83 is applied by a method such as dropping or injecting.

次に、第１部材８１に第２部材８３が適用されると、第２運転モードが実行される。
ユーザによる第１部材８１への第２部材８３の適用が完了すると、ユーザは完了を運転制御部７１に通知する。例えば、ユーザが完了の際に図示しない完了ボタンを押圧すると、運転制御部７１は、第１部材８１への第２部材８３の適用が完了したことを把握できる。
また、補修装置が第１部材８１への第２部材８３の適用を完了したことに応じて完了信号を運転制御部７１に送信すると、運転制御部７１は第１部材８１への第２部材８３の適用が完了したことを把握できる。
運転制御部７１は、完了ボタンの押圧を検出するか、また、補修装置からの完了信号を受信すると、第２運転モードを実行する。 Next, when the second member 83 is applied to the first member 81, the second operation mode is executed.
When the application of the second member 83 to the first member 81 by the user is completed, the user notifies the operation control unit 71 of the completion. For example, when the user presses a completion button (not shown) at the time of completion, the operation control unit 71 can grasp that the application of the second member 83 to the first member 81 is completed.
Further, when the repair device transmits a completion signal to the operation control unit 71 in response to the completion of the application of the second member 83 to the first member 81, the operation control unit 71 causes the second member 83 to the first member 81. It can be grasped that the application of is completed.
When the operation control unit 71 detects the pressing of the completion button or receives the completion signal from the repair device, the operation control unit 71 executes the second operation mode.

上記において、任意のタイミング、定期的なタイミング、燃料ガス等の漏洩が検出されたタイミングで第１部材８１への第２部材８３の適用を実行し、その後、第２運転モードが実行されるとした。以下では、燃料ガス等の漏洩が検出されたタイミングで第１部材８１に第２部材８３を適用し、その後、第２運転モードを開始する構成についてさらに説明する。 In the above, when the application of the second member 83 to the first member 81 is executed at an arbitrary timing, a periodic timing, or a timing when a leakage of fuel gas or the like is detected, and then the second operation mode is executed. bottom. Hereinafter, the configuration in which the second member 83 is applied to the first member 81 at the timing when the leakage of fuel gas or the like is detected, and then the second operation mode is started will be further described.

運転制御部７１は、燃焼部温度検出部Ｔ２が検出したセル燃焼排ガスの温度が開始用燃焼温度閾値よりも大きくなると、第１部材８１に第２部材８３を適用するようにユーザ及び補修装置等に報知する。運転制御部７１は、第１部材８１に第２部材８３が適用されたことを検出すると、その後、第２運転モードを実行する。燃焼部２９から排出されるセル燃焼排ガスの温度が開始用燃焼温度閾値よりも大きくなった場合とは、燃料ガスと酸化剤ガスとを用いた燃料電池セルＡでの発電性能が低下し、燃焼部２９での未燃ガスの燃焼が増加してセル燃焼排ガスの温度が上昇している場合である。この場合、シール部材８０を構成している第１部材８１が破損して燃料ガス及び酸化剤ガス等が漏洩し、発電性能の低下が生じているとして、運転制御部７１は第１部材８１の破損を第２部材８３により修復するための第２運転モードを実行する。なお、開始用燃焼温度閾値は、例えば、通常運転での燃焼部２９におけるセル燃焼排ガスの温度より高い温度に設定されている。 When the temperature of the cell combustion exhaust gas detected by the combustion unit temperature detection unit T2 becomes larger than the start combustion temperature threshold value, the operation control unit 71 applies the second member 83 to the first member 81, such as a user and a repair device. Notify to. When the operation control unit 71 detects that the second member 83 has been applied to the first member 81, the operation control unit 71 then executes the second operation mode. When the temperature of the cell combustion exhaust gas discharged from the combustion unit 29 becomes higher than the starting combustion temperature threshold, the power generation performance in the fuel cell A using the fuel gas and the oxidant gas deteriorates, and combustion occurs. This is a case where the combustion of the unburned gas in the part 29 increases and the temperature of the cell combustion exhaust gas rises. In this case, assuming that the first member 81 constituting the seal member 80 is damaged and the fuel gas, the oxidant gas, etc. leak, and the power generation performance is deteriorated, the operation control unit 71 of the first member 81 A second operation mode for repairing the damage by the second member 83 is executed. The starting combustion temperature threshold is set to a temperature higher than the temperature of the cell combustion exhaust gas in the combustion unit 29 in normal operation, for example.

運転制御部７１は、触媒温度検出部Ｔ３が検出した触媒燃焼排ガスの温度が開始用触媒温度閾値よりも大きくなると、第１部材８１に第２部材８３を適用するようにユーザ及び補修装置等に報知する。運転制御部７１は、第１部材８１に第２部材８３が適用されたことを検出すると、その後、第２運転モードを実行する。燃焼触媒部３５から排出される触媒燃焼排ガスの温度が開始用触媒温度閾値よりも大きくなった場合とは、燃料ガスと酸化剤ガスとを用いた燃料電池セルＡでの発電性能が低下し、燃焼触媒部３５での未燃ガスの燃焼が増加し触媒燃焼排ガスの温度が上昇した場合である。この場合、シール部材８０を構成している第１部材８１が破損して燃料ガス及び酸化剤ガス等が漏洩し、発電性能の低下が生じているとして、運転制御部７１は第１部材８１の破損を第２部材８３により修復するための第２運転モードを実行する。なお、開始用触媒温度閾値は、例えば、通常運転での燃焼触媒部３５における触媒燃焼排ガスの温度より高い温度に設定されている。 When the temperature of the catalyst combustion exhaust gas detected by the catalyst temperature detection unit T3 becomes higher than the starting catalyst temperature threshold value, the operation control unit 71 tells the user, the repair device, and the like to apply the second member 83 to the first member 81. Notify. When the operation control unit 71 detects that the second member 83 has been applied to the first member 81, the operation control unit 71 then executes the second operation mode. When the temperature of the catalyst combustion exhaust gas discharged from the combustion catalyst unit 35 becomes larger than the starting catalyst temperature threshold, the power generation performance in the fuel cell A using the fuel gas and the oxidant gas deteriorates. This is a case where the combustion of unburned gas in the combustion catalyst unit 35 increases and the temperature of the catalyst combustion exhaust gas rises. In this case, assuming that the first member 81 constituting the seal member 80 is damaged and the fuel gas, the oxidant gas, etc. leak, and the power generation performance is deteriorated, the operation control unit 71 of the first member 81 A second operation mode for repairing the damage by the second member 83 is executed. The starting catalyst temperature threshold is set to a temperature higher than the temperature of the catalyst combustion exhaust gas in the combustion catalyst unit 35 in normal operation, for example.

運転制御部７１は、電圧検出部Ｖが検出した発電電圧が開始用電圧閾値よりも小さくなると、第１部材８１に第２部材８３を適用するようにユーザ及び補修装置等に報知する。運転制御部７１は、第１部材８１に第２部材８３が適用されたことを検出すると、その後、第２運転モードを実行する。電圧検出部Ｖが検出した燃料電池セルＡの発電電圧が開始用電圧閾値よりも小さくなった場合とは、燃料ガスと酸化剤ガスとを用いた燃料電池セルＡでの発電性能が低下した場合である。この場合、シール部材８０を構成している第１部材８１が破損して燃料ガス及び酸化剤ガス等が漏洩し、発電性能の低下が生じているとして、運転制御部７１は第１部材８１の破損を第２部材８３によりを修復するための第２運転モードを実行する。なお、開始用電圧閾値は、例えば、通常運転での燃料電池セルＡにおける発電電圧より低い電圧に設定されている。 When the generated voltage detected by the voltage detection unit V becomes smaller than the starting voltage threshold value, the operation control unit 71 notifies the user, the repair device, and the like to apply the second member 83 to the first member 81. When the operation control unit 71 detects that the second member 83 has been applied to the first member 81, the operation control unit 71 then executes the second operation mode. The case where the generated voltage of the fuel cell A detected by the voltage detection unit V becomes smaller than the starting voltage threshold is the case where the power generation performance of the fuel cell A using the fuel gas and the oxidant gas deteriorates. Is. In this case, assuming that the first member 81 constituting the seal member 80 is damaged and the fuel gas, the oxidant gas, etc. leak, and the power generation performance is deteriorated, the operation control unit 71 of the first member 81 A second operation mode is executed to repair the damage by the second member 83. The starting voltage threshold is set to a voltage lower than the generated voltage in the fuel cell A in normal operation, for example.

（２−４）第２運転モードの終了条件の例
運転制御部７１は、第２運転モードを開始した後、任意のタイミング、第２運転モードを所定期間実行した後のタイミング、燃料電池システム１００の状態に基づいたタイミング等の所定のタイミングで第２運転モードを終了する。ここでは、燃料電池システム１００の状態に基づいたタイミングでの第２運転モードの終了について説明する。 (2-4) Example of Termination Condition of Second Operation Mode The operation control unit 71 has an arbitrary timing after starting the second operation mode, a timing after executing the second operation mode for a predetermined period, and a fuel cell system 100. The second operation mode is terminated at a predetermined timing such as a timing based on the state of. Here, the termination of the second operation mode at the timing based on the state of the fuel cell system 100 will be described.

燃焼部２９から排出されるセル燃焼排ガスの温度が停止用燃焼温度閾値よりも小さくなった場合、運転制御部７１は第２運転モードの実行を停止する。なお、燃焼部２９から排出されるセル燃焼排ガスの温度が停止用燃焼温度閾値よりも小さくなった場合とは、燃料ガスと酸化剤ガスとを用いた燃料電池セルＡでの発電性能が向上し、燃焼部２９での未燃ガスの燃焼が減り燃焼部２９の温度が低下した場合である。この場合、運転制御部７１は、第１部材８１の破損が第２部材８３により修復されて燃料ガス及び酸化剤ガス等の漏洩が抑制され、発電性能の低下が抑制されたとして、第２運転モードの実行を停止する。
なお、停止用燃焼温度閾値は、例えば、通常運転での燃焼部２９におけるセル燃焼排ガスの温度に設定されている。 When the temperature of the cell combustion exhaust gas discharged from the combustion unit 29 becomes smaller than the stop combustion temperature threshold value, the operation control unit 71 stops the execution of the second operation mode. When the temperature of the cell combustion exhaust gas discharged from the combustion unit 29 becomes smaller than the combustion temperature threshold for stopping, the power generation performance in the fuel cell A using the fuel gas and the oxidant gas is improved. This is a case where the combustion of unburned gas in the combustion unit 29 is reduced and the temperature of the combustion unit 29 is lowered. In this case, the operation control unit 71 considers that the damage of the first member 81 is repaired by the second member 83, the leakage of the fuel gas, the oxidant gas, and the like is suppressed, and the deterioration of the power generation performance is suppressed, and the second operation is performed. Stops mode execution.
The stop combustion temperature threshold is set to, for example, the temperature of the cell combustion exhaust gas in the combustion unit 29 in normal operation.

燃焼触媒部３５から排出される触媒燃焼排ガスの温度が停止用触媒温度閾値よりも小さくなった場合、運転制御部７１は第２運転モードの実行を停止する。なお、燃焼触媒部３５から排出される触媒燃焼排ガスの温度が停止用触媒温度閾値よりも小さくなった場合とは、燃料ガスと酸化剤ガスとを用いた燃料電池セルＡでの発電性能が向上し、燃焼触媒部３５での未燃ガスの燃焼が減り温度が低下した場合である。この場合、運転制御部７１は、第１部材８１の破損が第２部材８３により修復されて燃料ガス及び酸化剤ガス等の漏洩が抑制され、発電性能の低下が抑制されたとして、第２運転モードの実行を停止する。
なお、停止用触媒温度閾値は、例えば、通常運転での燃焼触媒部３５における触媒燃焼排ガスの温度に設定されている。 When the temperature of the catalyst combustion exhaust gas discharged from the combustion catalyst unit 35 becomes smaller than the stop catalyst temperature threshold value, the operation control unit 71 stops the execution of the second operation mode. When the temperature of the catalyst combustion exhaust gas discharged from the combustion catalyst unit 35 becomes smaller than the stop catalyst temperature threshold, the power generation performance in the fuel cell A using the fuel gas and the oxidant gas is improved. However, this is a case where the combustion of the unburned gas in the combustion catalyst unit 35 is reduced and the temperature is lowered. In this case, the operation control unit 71 considers that the damage of the first member 81 is repaired by the second member 83, the leakage of the fuel gas, the oxidant gas, and the like is suppressed, and the deterioration of the power generation performance is suppressed, and the second operation is performed. Stops mode execution.
The stop catalyst temperature threshold is set to, for example, the temperature of the catalyst combustion exhaust gas in the combustion catalyst unit 35 in normal operation.

電圧検出部Ｖが検出した燃料電池セルＡの発電電圧が停止用電圧閾値よりも大きくなった場合、運転制御部７１は第２運転モードの実行を停止する。なお、電圧検出部Ｖが検出した発電電圧が停止用電圧閾値よりも大きくなった場合とは、燃料ガスと酸化剤ガスとを用いた燃料電池セルでの発電性能が向上して発電電圧が上昇した場合である。この場合、運転制御部７１は、第１部材８１の破損が第２部材８３により修復されて燃料ガス及び酸化剤ガス等の漏洩が抑制され、発電性能の低下が抑制されたとして、第２運転モードの実行を停止する。
なお、停止用電圧閾値は、例えば、通常運転での燃料電池セルＡの発電電圧に設定されている。 When the generated voltage of the fuel cell A detected by the voltage detection unit V becomes larger than the stop voltage threshold value, the operation control unit 71 stops the execution of the second operation mode. When the generated voltage detected by the voltage detection unit V becomes larger than the stop voltage threshold, the power generation performance in the fuel cell using the fuel gas and the oxidizing agent gas is improved and the generated voltage rises. If you do. In this case, the operation control unit 71 considers that the damage of the first member 81 is repaired by the second member 83, the leakage of the fuel gas, the oxidant gas, and the like is suppressed, and the deterioration of the power generation performance is suppressed, and the second operation is performed. Stops mode execution.
The stop voltage threshold value is set to, for example, the generated voltage of the fuel cell A in normal operation.

〔実験例〕
図２〜図５に示す円筒平板型の燃料電池モジュール２３において、図６に示すようにシール部材８０に破損部分８５を形成した。第１部材８１は、Ｓｉ、Ａｌ等の成分を含むガラス材料で形成されている。
また、第２部材８３は、Ｂ、Ｍｇ、Ｃａ、Ｂａ等の成分を含むガラスフリットＡ〜Ｃを用いて形成されている。ガラスフリットＡ〜Ｃの非晶質ガラス以外の組成は次の通りである。ガラスフリットＡ〜Ｃそれぞれは、テルピネオールを分散媒としたペーストに生成され、第１部材８１の上部に第２部材８３として塗布されている。
ガラスフリットＡ：Ｂ６％、Ｍｇ１２％、Ａｌ４％、Ｓｉ６％、Ｃａ３％、Ｚｎ１０％、Ｂａ１９％
ガラスフリットＢ：Ｂ５％、Ｍｇ９％、Ａｌ３％、Ｓｉ５％、Ｚｎ５％、Ｂａ１０％、Ｌａ３０％
ガラスフリットＣ：Ｂ５％、Ｍｇ１２％、Ａｌ３％、Ｓｉ５％、Ｃａ５％、Ｌａ３３％ [Experimental example]
In the cylindrical flat plate type fuel cell module 23 shown in FIGS. 2 to 5, a damaged portion 85 is formed in the seal member 80 as shown in FIG. The first member 81 is made of a glass material containing components such as Si and Al.
Further, the second member 83 is formed by using glass frits A to C containing components such as B, Mg, Ca, and Ba. The compositions of the glass frits A to C other than the amorphous glass are as follows. Each of the glass frits A to C is produced in a paste using terpineol as a dispersion medium, and is applied to the upper portion of the first member 81 as the second member 83.
Glass frit A: B6%, Mg12%, Al4%, Si6%, Ca3%, Zn10%, Ba19%
Glass frit B: B5%, Mg9%, Al3%, Si5%, Zn5%, Ba10%, La30%
Glass frit C: B5%, Mg12%, Al3%, Si5%, Ca5%, La33%

上記の組成の第１部材８１及び第２部材８３から形成されたシール部材８０を燃料電池セルＡとマニホールドＭとの接合部分に塗布し、円筒平板型の燃料電池モジュール２３を作成した。燃料電池セルＡに燃料ガス及び酸化剤ガスを供給しつつ、７９０℃まで温度を上昇させて２時間運転を継続した。２時間運転前のシール部近傍のＨｅガスリーク濃度及び２時間運転後のシール部近傍のＨｅガスリーク濃度をそれぞれＨｅリークディテクターにて測定した。測定結果は以下の通りである。

Figure 2021163520
Ｔｇ：ガラス転移温度であり、ミクロな流動性が生じる温度
Ｔｓ：軟化点温度であり、マクロな流動性が出てくる温度
Ｔｃ：結晶化温度であり、ガラスの結晶化発熱が最大となる温度 The seal member 80 formed of the first member 81 and the second member 83 having the above composition was applied to the joint portion between the fuel cell A and the manifold M to prepare a cylindrical flat plate type fuel cell module 23. While supplying the fuel gas and the oxidant gas to the fuel cell A, the temperature was raised to 790 ° C. and the operation was continued for 2 hours. The He gas leak concentration in the vicinity of the seal portion before the 2-hour operation and the He gas leak concentration in the vicinity of the seal portion after the 2-hour operation were measured with a He leak detector. The measurement results are as follows.
Figure 2021163520
 Tg: Glass transition temperature, temperature at which micro-fluidity occurs Ts: Softening point temperature, temperature at which macro-fluidity appears Tc: Crystallization temperature, temperature at which glass crystallization heat generation is maximized

上記の結果に示す通り、第２部材８３にガラスフリットＡ〜Ｃを用いて燃料電池セルＡを７９０℃で運転した場合、いずれもＨｅガスのリーク量が運転前よりも運転後の方が減少している。一方、第２部材８３を含まず第１部材８１のみでシール部材８０が形成されている場合には、運転前より運転後の方がリーク量が増加している。これは、第１部材８１の破損部分８５が修復されておらず、Ｈｅガスがリークしていることを意味する。
この結果から、第1部材８１の破損部分８５が、第２部材８３が溶融して入りこむことによって修復されていることが分かる。 As shown in the above results, when the fuel cell A is operated at 790 ° C. using the glass frits A to C for the second member 83, the amount of He gas leak is smaller after the operation than before the operation. doing. On the other hand, when the seal member 80 is formed only by the first member 81 without including the second member 83, the amount of leakage increases after the operation than before the operation. This means that the damaged portion 85 of the first member 81 has not been repaired and the He gas is leaking.
From this result, it can be seen that the damaged portion 85 of the first member 81 is repaired by melting and entering the second member 83.

〔他の実施形態〕
なお上述の実施形態（他の実施形態を含む、以下同じ）で開示される構成は、矛盾が生じない限り、他の実施形態で開示される構成と組み合わせて適用することが可能であり、また、本明細書において開示された実施形態は例示であって、本発明の実施形態はこれに限定されず、本発明の目的を逸脱しない範囲内で適宜改変することが可能である。 [Other Embodiments]
The configurations disclosed in the above-described embodiments (including other embodiments, the same shall apply hereinafter) can be applied in combination with the configurations disclosed in the other embodiments as long as there is no contradiction. , The embodiments disclosed in the present specification are examples, and the embodiments of the present invention are not limited thereto, and can be appropriately modified without departing from the object of the present invention.

（１）上記実施形態の図７等では、溶融する第２部材８３が第１部材８１の上方に配置されている。しかし、第１部材８１と第２部材８３との配置関係はこれに限定されない。図２１に示すように、第１部材８１が第２部材の上方に配置されても良いし、第１部材８１と第２部材８３とが左右方向に並ぶように配置されてもよい。また、第１部材８１が第２部材８３により挟持されるようにシール部材８０が構成されてもよい。また、第２部材８３により第１部材８１の破損部分８５を修復できればよく、第１部材８１と第２部材８３との間に別途の介在層が配置されていてもよい。
また、第２部材８３は第１部材８１の表面全体を覆っている必要はなく、第１部材８１の表面の一部を覆っていてもよい。 (1) In FIG. 7 and the like of the above embodiment, the melting second member 83 is arranged above the first member 81. However, the arrangement relationship between the first member 81 and the second member 83 is not limited to this. As shown in FIG. 21, the first member 81 may be arranged above the second member, or the first member 81 and the second member 83 may be arranged so as to be arranged in the left-right direction. Further, the seal member 80 may be configured so that the first member 81 is sandwiched by the second member 83. Further, it is sufficient that the damaged portion 85 of the first member 81 can be repaired by the second member 83, and a separate intervening layer may be arranged between the first member 81 and the second member 83.
Further, the second member 83 does not have to cover the entire surface of the first member 81, and may cover a part of the surface of the first member 81.

（２）上記実施形態では、運転制御部７１が、通常の運転温度よりも高温の運転温度において燃料電池セルＡを運転することで、第２部材８３を第２軟化点温度以上第１軟化点温度未満として第１部材８１を修復している。しかし、第２部材８３を第２軟化点温度以上第１軟化点温度未満に加熱できればよく、第１部材８１の修復にあたって燃料電池セルＡの運転状態を変更する必要はない。例えば、図２２に示すように、燃料電池発電装置１の収納容器４０内にヒータ（加熱部）７５を配置し、ヒータ７５によりシール部材８０を加熱してもよい。この場合、加熱部制御部７３は、上述したのと同様に任意のタイミング、定期的なタイミング、燃料ガス等の漏洩が検出されたタイミングでヒータ７５を加熱し、第２軟化点温度以上第１軟化点温度未満でシール部材８０を加熱するように制御する。 (2) In the above embodiment, the operation control unit 71 operates the fuel cell A at an operating temperature higher than the normal operating temperature to bring the second member 83 to the second softening point temperature or higher and the first softening point. The first member 81 is being repaired so that the temperature is lower than the temperature. However, it is sufficient that the second member 83 can be heated to be equal to or higher than the second softening point temperature and lower than the first softening point temperature, and it is not necessary to change the operating state of the fuel cell A when repairing the first member 81. For example, as shown in FIG. 22, a heater (heating unit) 75 may be arranged in the storage container 40 of the fuel cell power generation device 1, and the seal member 80 may be heated by the heater 75. In this case, the heating unit control unit 73 heats the heater 75 at an arbitrary timing, at a periodic timing, and at a timing when leakage of fuel gas or the like is detected, as described above, and is the first softening point temperature or higher. The sealing member 80 is controlled to be heated below the softening point temperature.

（３）上記実施形態では、溶融した第２部材８３が第１部材８１の破損部分８５に入り込む方法の一例として、第１部材８１の上方に配置され流動状態となった第２部材８３が重力により第１部材８１の破損部分８５に入りこむ態様を説明した。しかし、流動状態の第２部材８３が第１部材８１の破損部分８５に入り込む態様としては、破損部分８５側からの圧力の吸引力による場合もあり得る。その他の入り込む態様として、毛細管現象等も挙げられる。 (3) In the above embodiment, as an example of a method in which the melted second member 83 enters the damaged portion 85 of the first member 81, the second member 83 arranged above the first member 81 and in a fluid state is gravity. The mode of entering the damaged portion 85 of the first member 81 has been described. However, the mode in which the second member 83 in the flowing state enters the damaged portion 85 of the first member 81 may be due to the suction force of the pressure from the damaged portion 85 side. Other modes of entry include capillarity and the like.

（４）上記実施形態では、第１運転モードにおける通常の運転温度を７００〜７５０℃とし、第２運転モードにおける運転温度を７８０〜９００℃とした。そして、第２部材８３の第２軟化点温度を７００℃以上とし、第１部材８１の第１軟化点温度を９００℃以上とした。しかし、第２運転モードにおける第１部材８１及び第２部材８３のシール温度が、通常の運転温度における第１部材８１及び第２部材８３のシール温度以上であり、かつ、第２軟化点温度以上第１軟化点温度未満との条件を満たすのであれば、通常の運転温度、第２運転モードにおける運転温度、第１軟化点温度、第２軟化点温度はこれに限定されない。 (4) In the above embodiment, the normal operating temperature in the first operating mode is 700 to 750 ° C, and the operating temperature in the second operating mode is 780 to 900 ° C. Then, the second softening point temperature of the second member 83 was set to 700 ° C. or higher, and the first softening point temperature of the first member 81 was set to 900 ° C. or higher. However, the sealing temperature of the first member 81 and the second member 83 in the second operation mode is equal to or higher than the sealing temperature of the first member 81 and the second member 83 in the normal operating temperature, and is equal to or higher than the second softening point temperature. As long as the condition of less than the first softening point temperature is satisfied, the normal operating temperature, the operating temperature in the second operating mode, the first softening point temperature, and the second softening point temperature are not limited thereto.

２３ ：燃料電池モジュール
７１ ：運転制御部
７３ ：加熱部制御部
７５ ：ヒータ
８０ ：シール部材
８１ ：第１部材
８３ ：第２部材
８５ ：破損部分
１００ ：燃料電池システム
Ａ ：燃料電池セル
Ｍ ：マニホールド 23: Fuel cell module 71: Operation control unit 73: Heating unit control unit 75: Heater 80: Seal member 81: First member 83: Second member 85: Damaged part 100: Fuel cell system A: Fuel cell M: Manifold

Claims (4)

燃料電池セルを有し、構成部材どうしを接合する接合部分に適用されるシール部材で前記構成部材どうしが接合されている燃料電池モジュールと、前記燃料電池セルの運転を制御する運転制御部とを備える燃料電池システムにおける前記シール部材の修復方法であって、
前記シール部材は、前記燃料電池セルの通常の運転温度より高温の運転温度において溶融し、第１軟化点温度を有する材料からなる第１部材を含み、
前記運転制御部は、
通常の運転温度で前記燃料電池セルを運転するように制御する第１運転モードを実行可能であり、
前記第１部材に、前記燃料電池セルの前記通常の運転温度より高温の運転温度において溶融し、かつ、前記第１部材の前記第１軟化点温度より低い第２軟化点温度を有する材料からなる第２部材が適用され、前記第１部材及び前記第２部材を含む複合部材が形成された状態で、前記燃料電池セルの前記通常の運転温度より高温の運転温度であり、かつ、前記第２軟化点温度以上前記第１軟化点温度未満で前記シール部材を加熱可能に前記燃料電池セルを運転するように制御する第２運転モードを実行する、シール部材の修復方法。 A fuel cell module having a fuel cell and having the components joined to each other by a seal member applied to a joining portion for joining the components, and an operation control unit for controlling the operation of the fuel cell. A method for repairing the seal member in a fuel cell system provided.
The sealing member includes a first member made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a first softening point temperature.
The operation control unit
It is possible to execute a first operation mode that controls the fuel cell to operate at a normal operating temperature.
The first member is made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a second softening point temperature lower than the first softening point temperature of the first member. In a state where the second member is applied and the first member and the composite member including the second member are formed, the operating temperature is higher than the normal operating temperature of the fuel cell and the second member is formed. A method for repairing a seal member, which executes a second operation mode for controlling the fuel cell to operate the fuel cell so that the seal member can be heated at a temperature equal to or higher than the softening point temperature and lower than the first softening point temperature. 燃料電池セルを有し、構成部材どうしを接合する接合部分に適用されるシール部材で前記構成部材どうしが接合されている燃料電池モジュールと、前記燃料電池セルの運転を制御する運転制御部とを備える燃料電池システムにおける前記シール部材の修復方法であって、
前記シール部材は、前記燃料電池セルの通常の運転温度より高温の運転温度において溶融し、第１軟化点温度を有する材料からなる第１部材を含み、
前記第１部材に、前記燃料電池セルの前記通常の運転温度より高温の運転温度において溶融し、かつ、前記第１部材の前記第１軟化点温度より低い第２軟化点温度を有する材料からなる第２部材を適用し、前記第１部材及び前記第２部材を含む複合部材を形成する工程と、
前記複合部材が形成された状態で、前記燃料電池セルの前記通常の運転温度より高温の運転温度であり、かつ、前記第２軟化点温度以上前記第１軟化点温度未満で前記シール部材を加熱可能に前記燃料電池セルを運転する工程と、を備えるシール部材の修復方法。 A fuel cell module having a fuel cell and having the components joined to each other by a seal member applied to a joining portion for joining the components, and an operation control unit for controlling the operation of the fuel cell. A method for repairing the seal member in a fuel cell system provided.
The sealing member includes a first member made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a first softening point temperature.
The first member is made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a second softening point temperature lower than the first softening point temperature of the first member. A step of applying the second member to form the first member and a composite member including the second member, and
In the state where the composite member is formed, the seal member is heated at an operating temperature higher than the normal operating temperature of the fuel cell and at a temperature equal to or higher than the second softening point temperature and lower than the first softening point temperature. A method of repairing a seal member comprising a step of operating the fuel cell as possible. 燃料電池セルを有し、構成部材どうしを接合する接合部分に適用されるシール部材で前記構成部材どうしが接合されている燃料電池モジュールと、前記燃料電池セルの運転を制御する運転制御部とを備える燃料電池システムであって、
前記シール部材は、前記燃料電池セルの通常の運転温度より高温の運転温度において溶融し、第１軟化点温度を有する材料からなる第１部材を含み、
前記運転制御部は、
通常の運転温度で前記燃料電池セルを運転するように制御する第１運転モードを実行可能であり、
前記第１部材に、前記燃料電池セルの前記通常の運転温度より高温の運転温度において溶融し、かつ、前記第１部材の前記第１軟化点温度より低い第２軟化点温度を有する材料からなる第２部材が適用され、前記第１部材及び前記第２部材を含む複合部材が形成された状態で、前記燃料電池セルの前記通常の運転温度より高温の運転温度、かつ、前記第２軟化点温度以上前記第１軟化点温度未満で前記シール部材を加熱可能に前記燃料電池セルを運転するように制御する第２運転モードを実行する、燃料電池システム。 A fuel cell module having a fuel cell and having the components joined to each other by a seal member applied to a joining portion for joining the components, and an operation control unit for controlling the operation of the fuel cell. It is a fuel cell system equipped
The sealing member includes a first member made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a first softening point temperature.
The operation control unit
It is possible to execute a first operation mode that controls the fuel cell to operate at a normal operating temperature.
The first member is made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a second softening point temperature lower than the first softening point temperature of the first member. In a state where the second member is applied and the first member and the composite member including the second member are formed, the operating temperature is higher than the normal operating temperature of the fuel cell and the second softening point is formed. A fuel cell system that executes a second operation mode that controls the fuel cell to operate so that the seal member can be heated at a temperature equal to or higher than the temperature of the first softening point. 燃料電池セルを有し、構成部材どうしを接合する接合部分に適用されるシール部材で前記構成部材どうしが接合されている燃料電池モジュールと、加熱部とを備える燃料電池システムにおける前記シール部材の修復方法であって、
前記シール部材は、前記燃料電池セルの通常の運転温度より高温の運転温度において溶融し、第１軟化点温度を有する材料からなる第１部材を含み、
前記第１部材に、前記燃料電池セルの前記通常の運転温度より高温の運転温度において溶融し、かつ、前記第１部材の前記第１軟化点温度より低い第２軟化点温度を有する材料からなる第２部材が適用され、前記第１部材及び前記第２部材を含む複合部材が構成された状態で、前記加熱部は前記第２軟化点温度以上前記第１軟化点温度未満で前記複合部材を加熱する、シール部材の修復方法。
Repair of the seal member in a fuel cell system including a fuel cell module having a fuel cell and a seal member applied to a joint portion for joining the constituent members to which the constituent members are joined, and a heating portion. It ’s a method,
The sealing member includes a first member made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a first softening point temperature.
The first member is made of a material that melts at an operating temperature higher than the normal operating temperature of the fuel cell and has a second softening point temperature lower than the first softening point temperature of the first member. In a state where the second member is applied and the first member and the composite member including the second member are configured, the heating unit holds the composite member at a temperature equal to or higher than the second softening point temperature and lower than the first softening point temperature. A method of repairing a sealing member by heating.
JP2020060614A 2020-03-30 2020-03-30 Seal member repair method and fuel cell system Active JP7349950B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2020060614A JP7349950B2 (en) 2020-03-30 2020-03-30 Seal member repair method and fuel cell system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2020060614A JP7349950B2 (en) 2020-03-30 2020-03-30 Seal member repair method and fuel cell system

Publications (2)

Publication Number Publication Date
JP2021163520A true JP2021163520A (en) 2021-10-11
JP7349950B2 JP7349950B2 (en) 2023-09-25

Family

ID=78003597

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2020060614A Active JP7349950B2 (en) 2020-03-30 2020-03-30 Seal member repair method and fuel cell system

Country Status (1)

Country Link
JP (1) JP7349950B2 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010003669A (en) * 2008-05-22 2010-01-07 National Institute Of Advanced Industrial & Technology Electrochemical reactor unit, and electrochemical reactor module and electrochemical reaction system composed of them
JP2012142243A (en) * 2011-01-06 2012-07-26 Nippon Telegr & Teleph Corp <Ntt> Gas sealing material
JP2014043370A (en) * 2012-08-27 2014-03-13 Tohoku Univ Tin-zinc-silica phosphate-based glass and glass sealing material for high temperature environment
JP2015529621A (en) * 2012-07-23 2015-10-08 モー−サイ・コーポレイションＭｏ−Ｓｃｉ Ｃｏｒｐｏｒａｔｉｏｎ Viscous sealing glass for solid oxide fuel cells
WO2017191787A1 (en) * 2016-05-06 2017-11-09 住友精密工業株式会社 Method for manufacturing fuel cell, and fuel cell

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010003669A (en) * 2008-05-22 2010-01-07 National Institute Of Advanced Industrial & Technology Electrochemical reactor unit, and electrochemical reactor module and electrochemical reaction system composed of them
JP2012142243A (en) * 2011-01-06 2012-07-26 Nippon Telegr & Teleph Corp <Ntt> Gas sealing material
JP2015529621A (en) * 2012-07-23 2015-10-08 モー−サイ・コーポレイションＭｏ−Ｓｃｉ Ｃｏｒｐｏｒａｔｉｏｎ Viscous sealing glass for solid oxide fuel cells
JP2014043370A (en) * 2012-08-27 2014-03-13 Tohoku Univ Tin-zinc-silica phosphate-based glass and glass sealing material for high temperature environment
WO2017191787A1 (en) * 2016-05-06 2017-11-09 住友精密工業株式会社 Method for manufacturing fuel cell, and fuel cell

Also Published As

Publication number Publication date
JP7349950B2 (en) 2023-09-25

Similar Documents

Publication Publication Date Title
JP5966970B2 (en) Fuel cell device and fuel cell system
JP5640884B2 (en) Secondary battery type fuel cell system
JP2012038689A (en) Operation method of fuel cell
US20130244126A1 (en) High-temperature operating fuel cell module, and high-temperature operating fuel cell system
JP6767399B2 (en) Fuel cell
JP2000164233A (en) Power generating system for solid high molecular fuel cell
JPH03219563A (en) Solid electrolyte type fuel cell
JP5225604B2 (en) Solid oxide fuel cell and power generation method thereof
JP6429019B2 (en) Solid oxide fuel cell device
JP7349950B2 (en) Seal member repair method and fuel cell system
JP3979775B2 (en) Hybrid fuel cell system
JP7423382B2 (en) Seal member, fuel cell system, and seal member repair method
KR20220054835A (en) Fuel cell system and operation method
JP5122064B2 (en) Horizontally striped solid oxide fuel cell bundle and unit
US8778550B2 (en) Battery of fuel cells
JP5005701B2 (en) Fuel cell system
JP7399013B2 (en) Seal member repair method and fuel cell system
JP5377835B2 (en) Fuel cell module
JP6185312B2 (en) Fuel cell
JP2006302791A (en) Fuel cell system
CN113285088B (en) Solid oxide fuel electric pile and system and application thereof
JP6394191B2 (en) Solid oxide fuel cell stack, solid oxide fuel cell module, and solid oxide fuel cell system
JP2005216652A (en) Solid oxide type fuel cell and solid oxide type fuel cell stack equipped therewith
JP6169917B2 (en) Fuel cell
JP2009205996A (en) Method of operating fuel cell system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20221216

TRDD Decision of grant or rejection written
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20230814

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20230816

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20230912

R150 Certificate of patent or registration of utility model

Ref document number: 7349950

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150