WO2006090922A1 - Fuel cell system and vehicle using fuel cell - Google Patents

Fuel cell system and vehicle using fuel cell Download PDF

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Publication number
WO2006090922A1
WO2006090922A1 PCT/JP2006/304196 JP2006304196W WO2006090922A1 WO 2006090922 A1 WO2006090922 A1 WO 2006090922A1 JP 2006304196 W JP2006304196 W JP 2006304196W WO 2006090922 A1 WO2006090922 A1 WO 2006090922A1
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WO
WIPO (PCT)
Prior art keywords
fuel cell
cell stack
cover
circuit board
cell
Prior art date
Application number
PCT/JP2006/304196
Other languages
French (fr)
Japanese (ja)
Inventor
Hironori Noto
Original Assignee
Toyota Jidosha Kabushiki Kaisha
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 Toyota Jidosha Kabushiki Kaisha filed Critical Toyota Jidosha Kabushiki Kaisha
Priority to JP2007504851A priority Critical patent/JP4656338B2/en
Priority to CA2595091A priority patent/CA2595091C/en
Publication of WO2006090922A1 publication Critical patent/WO2006090922A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
    • H01M8/04537—Electric variables
    • H01M8/04544—Voltage
    • H01M8/04552—Voltage of the individual fuel cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/24—Grouping of fuel cells, e.g. stacking of fuel cells
    • H01M8/241—Grouping of fuel cells, e.g. stacking of fuel cells with solid or matrix-supported electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
    • 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
    • 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
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/40—Application of hydrogen technology to transportation, e.g. using fuel cells

Definitions

  • the present invention relates to a fuel cell system and a vehicle equipped with a fuel cell system, and more particularly to an electromagnetic shield of a circuit board for cell monitoring of a fuel cell stack.
  • the polymer electrolyte fuel cell is a membrane-electrode assembly (MEA:
  • a terminal electrode plate
  • an insulator insulator
  • an end plate arranged at both ends of the cell stack in the cell stacking direction, the cell stack is clamped in the cell stacking direction, and the cell stacking direction is outside the cell stack.
  • a fuel cell stack is formed by fixing with a fastening member (for example, a tension plate) and bolts extending in the direction.
  • a cell monitor for monitoring the cell voltage is fixed, for example, above the fuel cell stack.
  • this cell monitor is a fuel cell case in which a cell monitor circuit board is covered with a case having a waterproof seal. It may be attached to the outer surface of the fuel cell, or may be fixed above the fuel cell stack via a case plate and housed in the fuel cell case together with the fuel cell stack. Disclosure of the invention
  • the fuel cell stack is connected to power converters such as inverters. Then, electromagnetic noise from the power conversion device is emitted from the fuel cell stack.
  • the cell monitor (circuit board) may malfunction due to this electromagnetic wave. In addition, electromagnetic noise emitted from the cell monitor may cause malfunction of external electronic equipment.
  • the present invention has been made in view of the above circumstances, and can suppress the influence of electromagnetic noise from the outside to the circuit board or from the circuit board to the outside, and can stably operate the fuel cell stack.
  • the object is to provide a fuel cell system and a vehicle equipped with the fuel cell system.
  • a fuel cell system includes a fuel cell stack in which a plurality of cells are stacked, a circuit board for monitoring a cell voltage of the fuel cell stack, and the fuel cell stack.
  • the circuit board is covered with a force bar having electromagnetic shielding properties.
  • having an electromagnetic wave shielding property means having a shielding effect of at least 40 to 120 db.
  • Cell voltage monitoring also includes detecting cell voltage.
  • electromagnetic noise from the outside of the circuit board such as electromagnetic waves emitted from the power conversion device through the fuel cell stack, is shielded by the cover. Conversely, electromagnetic noise from the circuit board is released to the outside.
  • a high electromagnetic shielding property can be obtained by forming the cover with a conductor or forming a conductor layer on the surface of the cover body. Further, by providing the cover so as to cover substantially the entire surface of the circuit board, higher electromagnetic shielding properties can be obtained.
  • the cover is made of a water-impermeable material, so that the connection formed around the circuit board (in the fuel cell case in the embodiment shown in FIGS. 1 to 3). The dew water is prevented from adhering to the circuit board.
  • the vehicle equipped with the fuel cell system of the present invention is a vehicle equipped with the fuel cell system having any one of the above configurations, wherein the cover is electrically connected to the conductor portion on the vehicle side via the conductive portion.
  • the conducting part may be a part that directly connects the cover and a conductor part on the vehicle side (for example, a vehicle body, a vehicle frame, etc.) and conducts them (for example, a conducting cable).
  • a conductive component in the embodiment shown in FIGS. 2 and 3, a metal fuel cell case or the like
  • a conductive component in the embodiment shown in FIGS. 2 and 3, a metal fuel cell case or the like
  • the cover that covers the circuit board can be grounded (grounded) to the vehicle-side conductor portion on which the fuel cell system is mounted via the conducting portion, so that the effect of suppressing the influence of electromagnetic noise can be reduced. It is possible to improve safety and safety.
  • the circuit board is electrically connected to at least some of the cells in the fuel cell stack by a cell moeter cable as a wiring. Further, the circuit board is fixed indirectly or directly to the frame of the fuel cell stack or the casing thereof via a bracket or the like, for example.
  • the frame is used to support the cell stack or to apply a fastening force to the cell stack, and examples thereof include end plates, tension plates, and tension bolts.
  • the case includes a member for the purpose of protecting the cell stack.
  • the fuel cell stack supplies power to a power storage device (battery or capacitor) or a traveling motor via a power converter (inverter, converter, etc.).
  • These power devices are preferably separately covered with a case having electromagnetic shielding properties, and power is transferred between the power devices.
  • the cable is preferably a shielded cable.
  • the shield wire of those cases It is desirable to be connected to the conductor of the vehicle in common with the monitor cover and cell monitor case. This configuration further reduces the effects of noise between power devices including the cell monitor (circuit board).
  • FIG. 1 is a side view showing a main part of a fuel cell system as an embodiment of the present invention.
  • FIG. 2 is a side view showing a main part of a modification of the fuel cell system.
  • FIG. 3 is a cross-sectional view showing an example of a state in which a fuel cell case containing the fuel cell stack shown in FIG. 2 is mounted on a vehicle.
  • Fig. 1 is a side view showing the fuel cell system.
  • the following description will be made using a solid polymer electrolyte fuel cell, but is not limited to the following example.
  • the fuel cell stack shown in the present embodiment is a solid polymer electrolyte type fuel cell stack, and is configured by stacking one or more layers of a cell-electrode assembly (MEA: Membrane-Electrode Assembly) 'and a separator. .
  • MEA Membrane-Electrode Assembly
  • terminals electrode plates
  • insulators insulators
  • end plates are arranged at both ends of the senore stack in the cell stack direction, the cell stack is tightened in the cell stack direction, and the cell stack is positioned outside the cell stack in the cell stack direction.
  • a fuel cell stack is formed by fixing with an extending fastening member (for example, a tension plate) and bolts.
  • reference numeral 1 denotes a cell stack that is fastened from both ends by end plates 2 A and 2 B, and the end plates 2 A and 2 B are fastened by a tension plate 5 to form a fuel cell stack 4.
  • a case plate 10 is supported above the fuel cell stack 4 via a plurality of collars 6.
  • a cell monitor 11 (circuit board) for monitoring the cell voltage for each cell or a plurality of cell groups is fixed above the splate 10.
  • the cell monitor 11 is attached to the tension plate 5 via the collar 6 and the case plate 10.
  • Reference numeral 13 denotes a mount for supporting the fuel cell stack 4.
  • the fuel cell stack 4 is housed in the fuel cell case 14 together with the cell monitor 11 1 while being supported by the mount 13.
  • the fuel cell stack 4 includes a traction motor and an auxiliary device by converting DC power supplied from either or both of the fuel cell stack 4 and the secondary battery into AC power (DC-AC conversion).
  • a traction inverter (power conversion device) and auxiliary inverter (power conversion device) that supply AC power to each motor are connected.
  • a ventilation membrane 15 is provided in the fuel cell case 14 for ventilation in the fuel cell case 14.
  • the ventilation membrane 15 is a membrane that selectively permeates only gas in order to prevent intrusion of liquids and foreign substances.
  • a ventilation port, a fan, a louver, etc. can be adopted.
  • Reference numeral 20 denotes a cell monitor cover (cover) that covers the cell monitor 11 independently of the fuel cell stack 4.
  • the cell monitor cover 20 is made of a material that is impermeable and has high electromagnetic shielding properties, such as copper or a copper-based alloy, iron or iron-based alloy, aluminum, or an aluminum-based conductor.
  • the cell monitor cover 20 is not limited to such a structure, and the cell monitor cover 20 may be formed of a conductive layer on the surface of a cover body made of resin or the like, or may be formed of a conductive resin.
  • the cell monitor cover 20 is provided so as to surround the entire cell monitor 11 except for an insertion port for wiring.
  • the fuel cell system of the present embodiment is configured as described above, so that electromagnetic waves emitted from the power conversion device such as an inverter connected to the fuel cell stack 4 via the fuel cell stack 4 are configured. Even if electromagnetic noise is emitted from the outside of the cell monitor 11 toward the cell monitor 11, this electromagnetic noise can be shielded by the cell monitor cover 20.
  • a ventilation film 15 is provided for ventilation. Therefore, as in the case where a vent, fan, louver, etc. are provided, outside air is taken in from the ventilation membrane 15, so that water vapor enters the fuel cell case 14 and dew condensation water 25 is generated. there is a possibility.
  • the cell monitor cover 20 is also impermeable to water, even if the condensed water 25 generated on the upper surface of the inner wall of the fuel cell case 14 falls as shown in the figure, the condensed water 25 Direct adhesion to the cell monitor 1 1 can be suppressed. Therefore, malfunction of the cell monitor 11 can be prevented, and the fuel cell stack 4 can be operated more stably.
  • the fuel cell case 14 has a double structure, the upper surface of the fuel cell case 14 is made hydrophilic, and the upper surface of the case 14 is inclined, so that It is possible to adopt a method such as preventing condensation water from falling or providing a heat insulating material on the inner surface of the fuel cell case 14.
  • a method for preventing the condensed water from adhering to the cell monitor 11 a method such as molding the cell monitor 11 with a water-impermeable material can be employed.
  • the cell monitor cover 20 made of the above-mentioned impermeable and highly electromagnetic shielding conductor, for example, stainless steel or It is electrically connected to a fuel cell case 14 made of a conductor such as aluminum via a force conducting cable 1 20.
  • the fuel cell case 14 is fixed on a metal vehicle frame 110, which is one of the conductor portions on the vehicle 100 side, by fastening bolts (not shown) or the like. As described above, the cell monitor cover 20 of this embodiment is electrically connected to the vehicle frame 110 via the conductive cable 120 and the fuel battery case 14.
  • the cell monitor cover 20 that covers the cell monitor 11 is connected to the conductor portion on the vehicle 100 side. Since it can be grounded (grounded) to a certain vehicle frame 1 1 0 via a conductive cable 1 2 0 which is a conductive part and a fuel cell case 1 4, the effect of suppressing the influence of the electromagnetic noise is improved, Safety can be improved.
  • the cell monitor cover 20 is electrically connected to the vehicle frame 110 on the vehicle 100 side. However, if it is a conductor on the vehicle 100 side, other parts, for example, the vehicle body. 1 1 1 may be electrically connected. In addition to the fuel cell case 14 or in place of the fuel cell case 14, there is no electrical connection between the cell monitor cover 20 and the vehicle 10 0 side conductor. It is possible to interpose a part having
  • the cell monitor (circuit board) 1 1 is provided in the fuel cell case (stack case) 14, but the cell battery is outside the fuel cell case 14.
  • the present invention is also applicable to a configuration in which Utah (circuit board) 11 and cell monitor cover (cell monitor case) 20 are provided.
  • electromagnetic noise from the outside of the circuit board such as electromagnetic waves emitted from the power conversion device through the fuel cell stack, is shielded by the cover, and electromagnetic noise from the circuit board is released to the outside. This is also suppressed. Therefore, stable operation of the fuel cell stack can be realized by suppressing malfunctions of the circuit board and electronic devices arranged outside the circuit board.
  • the present invention can be widely used for fuel cell systems and vehicles equipped with fuel cell systems that have such requirements.

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  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Battery Mounting, Suspending (AREA)
  • Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)

Abstract

It is possible to suppress affect an electromagnetic noise to a circuit board from outside or to the outside from the circuit board and realize stable operation of a fuel cell stack. A fuel cell system includes a fuel cell stack (4) formed by a plurality of cells overlain and a cell monitor substrate (11) for monitoring the cell voltage of the fuel cell stack (4) which are contained in a fuel cell case (14). The fuel cell stack (4) is connected to a power converter such as an inverter. The cell monitor substrate (11) is covered by a cell monitor cover (20) having a high electromagnetic wave shielding ability. The cell monitor cover (20) is formed by a conductor such as copper, iron, and aluminum.

Description

明細書 燃料電池システム及び燃料電池システム搭載車両 技術分野  Description Fuel cell system and vehicle equipped with fuel cell system TECHNICAL FIELD
本発明は、 燃料電池システム及び燃料電池システム搭載車両に関し、 特に 燃料電池スタックのセルモニタ用回路基板の電磁シールドに関する。 背景技術  The present invention relates to a fuel cell system and a vehicle equipped with a fuel cell system, and more particularly to an electromagnetic shield of a circuit board for cell monitoring of a fuel cell stack. Background art
固体高分子電解質型燃料電池は、 膜—電極アッセンプリ （M E A :  The polymer electrolyte fuel cell is a membrane-electrode assembly (MEA:
Membrane-Electrode Assembly ) とセパレータとからなるセノレを 1層以上 重ねて構成される。 詳細には、 セル積層体のセル積層方向両端に、 ターミナ ル（電極板）、 インシユレ一タ、 エンドプレートを配置し、 セル積層体をセル 積層方向に締め付け、セル積層体の外側でセル積層方向に延びる締結部材（た とえば、 テンションプレート） とボルトにて固定して、 燃料電池スタックが 形成される。  Membrane-Electrode Assembly) and one or more layers of senor made up of separators. Specifically, a terminal (electrode plate), an insulator, and an end plate are arranged at both ends of the cell stack in the cell stacking direction, the cell stack is clamped in the cell stacking direction, and the cell stacking direction is outside the cell stack. A fuel cell stack is formed by fixing with a fastening member (for example, a tension plate) and bolts extending in the direction.
燃料電池スタックを安定的に運転するために、 セル電圧を監視するセルモ ニタが燃料電池スタックの例えば上方に固定される。 このセルモニタは、 例 えば特開 2 0 0 4 - 1 2 7 7 7 9号公報に開示されているように、 セルモニ タ回路基板が防水性シールを有するケースで覆われた上で、 燃料電池ケース の外面に取り付けられることもあれば、 ケースプレートを介して燃料電池ス タックの上方に固定され、 この燃料電池スタックと共に燃料電池ケース内に 収容されることもある。 発明の開示  In order to stably operate the fuel cell stack, a cell monitor for monitoring the cell voltage is fixed, for example, above the fuel cell stack. For example, as disclosed in Japanese Patent Application Laid-Open No. 2 00 4-1 2 7 7 9 9, this cell monitor is a fuel cell case in which a cell monitor circuit board is covered with a case having a waterproof seal. It may be attached to the outer surface of the fuel cell, or may be fixed above the fuel cell stack via a case plate and housed in the fuel cell case together with the fuel cell stack. Disclosure of the invention
ところで、 燃料電池スタックがインバータ等の電力変換機器と接続されてい ると、 電力変換機器からの電磁ノィズが燃料電池スタックから発せられる。 この電磁波の影響により、 セルモニタ （回路基板） が誤動作する可能性があ る。 また、 セルモニタから放出される電磁ノイズが外部の電子機器の誤動作 を招く可能性もある。 By the way, the fuel cell stack is connected to power converters such as inverters. Then, electromagnetic noise from the power conversion device is emitted from the fuel cell stack. The cell monitor (circuit board) may malfunction due to this electromagnetic wave. In addition, electromagnetic noise emitted from the cell monitor may cause malfunction of external electronic equipment.
本発明は上記事情に鑑みて成されたものであり、 外部から回路基板に対す る、 あるいは回路基板から外部に対する電磁ノイズの影響を抑制し、 燃料電 池スタックを安定的に運転することができる燃料電池システムと燃料電池シ ステム搭載車両を提供することを目的とする。  The present invention has been made in view of the above circumstances, and can suppress the influence of electromagnetic noise from the outside to the circuit board or from the circuit board to the outside, and can stably operate the fuel cell stack. The object is to provide a fuel cell system and a vehicle equipped with the fuel cell system.
上記の課題を解決するため、 本発明の燃料電池システムは、 複数のセルが 積層されてなる燃料電池スタックと、 該燃料電池スタックのセル電圧を監視 する回路基板と、 前記燃料電池スタックに接続された電力変換機器とを備え た燃料電池システムにおいて、 前記回路基板が電磁波シールド性を有する力 バーで覆われている。  In order to solve the above problems, a fuel cell system according to the present invention includes a fuel cell stack in which a plurality of cells are stacked, a circuit board for monitoring a cell voltage of the fuel cell stack, and the fuel cell stack. In the fuel cell system including the power conversion device, the circuit board is covered with a force bar having electromagnetic shielding properties.
ここで、 電磁波シールド性を有するとは、 少なくとも 4 0〜1 2 0 d bの シールド効果を有することをいう。 また、 セル電圧の監視には、 セル電圧を 検出することも含まれる。  Here, having an electromagnetic wave shielding property means having a shielding effect of at least 40 to 120 db. Cell voltage monitoring also includes detecting cell voltage.
この発明によれば、 電力変換機器から燃料電池スタックを介して放出され る電磁波等、 回路基板の外部からの電磁ノイズがカバーにより遮蔽 （シール ド） される。 また逆に、 回路基板からの電磁ノイズが外部へ放出されること ち抑制さ る。  According to the present invention, electromagnetic noise from the outside of the circuit board, such as electromagnetic waves emitted from the power conversion device through the fuel cell stack, is shielded by the cover. Conversely, electromagnetic noise from the circuit board is released to the outside.
好ましくはカバーを導体により構成する、 あるいはカバー本体の表面に導 体層を形成することで、 高い電磁波シールド性を得ることができる。 また、 カバーは回路基板の略全面を覆うように設けることで、 より高い電磁波シー ルド性を得ることができる。  Preferably, a high electromagnetic shielding property can be obtained by forming the cover with a conductor or forming a conductor layer on the surface of the cover body. Further, by providing the cover so as to cover substantially the entire surface of the circuit board, higher electromagnetic shielding properties can be obtained.
さらに好ましくは、 カバーを不透水性の素材により構成することで、 回路 基板の周辺 （図 1〜3に示す実施形態では、 燃料電池ケース内） で生じた結 露水が回路基板に付着することが抑制される。 More preferably, the cover is made of a water-impermeable material, so that the connection formed around the circuit board (in the fuel cell case in the embodiment shown in FIGS. 1 to 3). The dew water is prevented from adhering to the circuit board.
本発明の燃料電池システム搭載車両は、 上記いずれかの構成を有する燃料 電池システムが搭載された車両において、 前記カバーが導通部を介して車両 側の導体部と導通している。 ここで、 導通部とは、 カバーと車両側の導体部 (例えば、 車両ボディ、 車両フレーム等） とを直接連結して両者を導通させ るもの （例えば、 導通ケーブル） でもよいし、 カバーと車両側の導体部との 間に配置された燃料電池システムの構成部品のうち導通性を有する部品 （図 2， 3に示す実施形態では、 金属製の燃料電池ケース等） を含むものでもよ い。  The vehicle equipped with the fuel cell system of the present invention is a vehicle equipped with the fuel cell system having any one of the above configurations, wherein the cover is electrically connected to the conductor portion on the vehicle side via the conductive portion. Here, the conducting part may be a part that directly connects the cover and a conductor part on the vehicle side (for example, a vehicle body, a vehicle frame, etc.) and conducts them (for example, a conducting cable). Among the components of the fuel cell system disposed between the side conductors and the conductive portion, a conductive component (in the embodiment shown in FIGS. 2 and 3, a metal fuel cell case or the like) may be included.
この発明によれば、 回路基板を覆うカバーを燃料電池システムが搭載され ている車両側の導体部へ導通部を介して接地 （アース） させることができの で、 電磁ノイズの影響を抑制する効果の向上、 さらには安全性の向上を図る ことができる。  According to the present invention, the cover that covers the circuit board can be grounded (grounded) to the vehicle-side conductor portion on which the fuel cell system is mounted via the conducting portion, so that the effect of suppressing the influence of electromagnetic noise can be reduced. It is possible to improve safety and safety.
回路基板は、 例えば、 燃料電池スタックのうち少なくとも一部のセルと、 配線たるセルモエタケーブルによって電気的に接続されている。 また、 回路 基板は、 例えば、 燃料電池スタックのフレームまたはその筐体に、 ブラケッ ト等を介して間接的に又は直接的に固定されている。ここで、フレームとは、 セル積層体を支持する、 またはセル積層体へ締結力を付与するものであり、 例えば、 ェンドプレートゃテンションプレート、 テンションボルト等があげ られる。一方、筐体には、セル積層体の保護を目的とした部材等も含まれる。 燃料電池スタックは、電力変換器（インバータ、コンバータ等） を介して、 蓄電装置 （バッテリやキャパシタ） や走行用モータに電力を供給する。 これ らの電力機器 （燃料電池、 電力変換器、 蓄電装置、 走行用モータ） は、 電磁 シールド性を有するケースで別個独立に覆われているのが好ましく、 また、 電力機器間で電力を授受するケーブルはシールドケーブルが好ましい。 さら に、 それらのケースおょぴシールドケーブルのシールド線は、 カバー (セル モニタカバー、 セルモニタケース） と共通の車両の導体部と導通しているこ とが望ましい。 この構成により、 セルモニタ （回路基板） を含む各電力機器 間でのノィズによる影響がさらに低減される。 For example, the circuit board is electrically connected to at least some of the cells in the fuel cell stack by a cell moeter cable as a wiring. Further, the circuit board is fixed indirectly or directly to the frame of the fuel cell stack or the casing thereof via a bracket or the like, for example. Here, the frame is used to support the cell stack or to apply a fastening force to the cell stack, and examples thereof include end plates, tension plates, and tension bolts. On the other hand, the case includes a member for the purpose of protecting the cell stack. The fuel cell stack supplies power to a power storage device (battery or capacitor) or a traveling motor via a power converter (inverter, converter, etc.). These power devices (fuel cells, power converters, power storage devices, travel motors) are preferably separately covered with a case having electromagnetic shielding properties, and power is transferred between the power devices. The cable is preferably a shielded cable. In addition, the shield wire of those cases It is desirable to be connected to the conductor of the vehicle in common with the monitor cover and cell monitor case. This configuration further reduces the effects of noise between power devices including the cell monitor (circuit board).
図面の簡単な説明 図 1は、 本発明の一実施形態としての燃料電池システムの要部を示す側面 図。 BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a main part of a fuel cell system as an embodiment of the present invention.
図 2は、 同燃料電池システムの変形例の要部を示す側面図。  FIG. 2 is a side view showing a main part of a modification of the fuel cell system.
図 3は、 図 2に示す燃料電池スタックを収容した燃料電池ケースが車両に 搭載された状態の一例を示す断面図。  FIG. 3 is a cross-sectional view showing an example of a state in which a fuel cell case containing the fuel cell stack shown in FIG. 2 is mounted on a vehicle.
発明を実施するための最良の形態 BEST MODE FOR CARRYING OUT THE INVENTION
次に、 本発明の一実施形態について図面を参照して説明する。 図 1は燃料 電池システムを示した側面図である。 なお、 以下においては固体高分子電解 質型燃料電池を用いて説明するが、 下記の例に限定されるものではない。 本実施形態において示す燃料電池スタックは固体高分子電解質型の燃料電 池スタックであり、 膜一電極ァッセンプリ （M E A： Membrane-Electrode Assembly ) 'とセパレータとからなるセルを 1層以上重ねて構成される。 詳 細には、 セノレ積層体のセル積層方向両端に、 ターミナル （電極板）、 インシュ レータ、 エンドプレートを配置し、 セル積層体をセル積層方向に締め付け、 セル積層体の外側でセル積層方向に延びる締結部材 （たとえば、 テンション プレート） とボルトにて固定して、 燃料電池スタックが形成される。  Next, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a side view showing the fuel cell system. The following description will be made using a solid polymer electrolyte fuel cell, but is not limited to the following example. The fuel cell stack shown in the present embodiment is a solid polymer electrolyte type fuel cell stack, and is configured by stacking one or more layers of a cell-electrode assembly (MEA: Membrane-Electrode Assembly) 'and a separator. . Specifically, terminals (electrode plates), insulators, and end plates are arranged at both ends of the senore stack in the cell stack direction, the cell stack is tightened in the cell stack direction, and the cell stack is positioned outside the cell stack in the cell stack direction. A fuel cell stack is formed by fixing with an extending fastening member (for example, a tension plate) and bolts.
図 1において、 符号 1はエンドプレート 2 A、 2 Bにより両端から締結さ れたセル積層体であり、 エンドプレート 2 A、 2 B間がテンションプレート 5で締結されて燃料電池スタック 4が形成されている。 燃料電池スタック 4 の上方には複数のカラー 6を介してケースプレート 1 0が支持され、 該ケー スプレート 1 0の上方にはセル毎あるいは複数セル群毎のセル電圧を監視す るセルモニタ 1 1 (回路基板） が固定されている。 In FIG. 1, reference numeral 1 denotes a cell stack that is fastened from both ends by end plates 2 A and 2 B, and the end plates 2 A and 2 B are fastened by a tension plate 5 to form a fuel cell stack 4. ing. A case plate 10 is supported above the fuel cell stack 4 via a plurality of collars 6. A cell monitor 11 (circuit board) for monitoring the cell voltage for each cell or a plurality of cell groups is fixed above the splate 10.
このように、 本実施形態では、 セルモニタ 1 1は、 テンションプレート 5 にカラー 6及びケースプレート 1 0を介して取り付けられている。  Thus, in this embodiment, the cell monitor 11 is attached to the tension plate 5 via the collar 6 and the case plate 10.
符号 1 3は燃料電池スタック 4を支持するマゥントであり、 燃料電池スタ ック 4は、 マウント 1 3に支持された状態でセルモニタ 1 1と共に燃料電池 ケース 1 4に収容されている。  Reference numeral 13 denotes a mount for supporting the fuel cell stack 4. The fuel cell stack 4 is housed in the fuel cell case 14 together with the cell monitor 11 1 while being supported by the mount 13.
また、 燃料電池スタック 4には、 当該燃料電池スタック 4と二次電池の双 方又は何れか一方から供給される直流電力を交流電力に変換 （D C— A C変 換） してトラクションモータ及び補機モータのそれぞれに交流電力を供給す るトラクシヨンインバータ (電力変換機器) 及び補機ィンバータ (電力変換 機器） が接続されている。  The fuel cell stack 4 includes a traction motor and an auxiliary device by converting DC power supplied from either or both of the fuel cell stack 4 and the secondary battery into AC power (DC-AC conversion). A traction inverter (power conversion device) and auxiliary inverter (power conversion device) that supply AC power to each motor are connected.
燃料電池スタック 4からは微量の水素ガスが透過するため、 燃料電池ケー ス 1 4内の換気の為に、 燃料電池ケース 1 4には換気膜 1 5が設けられてい る。 換気膜 1 5は液体や異物などの侵入を防ぐために気体のみを選択的に透 過させる膜である。 なお、 この換気膜 1 5に代えて、 換気口、 ファン、 ルー バー等を採用することも可能である。  Since a small amount of hydrogen gas permeates from the fuel cell stack 4, a ventilation membrane 15 is provided in the fuel cell case 14 for ventilation in the fuel cell case 14. The ventilation membrane 15 is a membrane that selectively permeates only gas in order to prevent intrusion of liquids and foreign substances. Instead of this ventilation membrane 15, a ventilation port, a fan, a louver, etc. can be adopted.
符号 2 0は、 セルモニタ 1 1を燃料電池スタック 4とは別個独立に覆うセ ルモニタカバー (カバー) である。 セルモニタカバー 2 0は、 不透水性であ つて電磁波シールド性の高い素材、 例えば、 銅あるいは銅系合金、 鉄あるい は鉄系合金、 アルミあるいはアルミ系合金等の導体より構成されている。 こ のような構成に限らず、 セルモニタカバー 2 0は、 樹脂製等のカバー本体の 表面に導体層を形成する、 あるいは導電性樹脂等により構成されていてもよ レ、。  Reference numeral 20 denotes a cell monitor cover (cover) that covers the cell monitor 11 independently of the fuel cell stack 4. The cell monitor cover 20 is made of a material that is impermeable and has high electromagnetic shielding properties, such as copper or a copper-based alloy, iron or iron-based alloy, aluminum, or an aluminum-based conductor. The cell monitor cover 20 is not limited to such a structure, and the cell monitor cover 20 may be formed of a conductive layer on the surface of a cover body made of resin or the like, or may be formed of a conductive resin.
セルモニタカバー 2 0は、 配線類の差し込み口等を除きセルモニタ 1 1の 全体を囲って設けられている。 本実施形態の燃料電池システムは、 以上のように構成されていることによ り、 燃料電池スタック 4に接続されているインバータ等の電力変換機器から 当該燃料電池スタック 4を介して放出される電磁波等、 セルモニタ 1 1の外 部から該セルモニタ 1 1に向かって電磁ノイズが放出されても、 この電磁ノ ィズをセルモニタカバー 2 0により遮蔽することができる。 The cell monitor cover 20 is provided so as to surround the entire cell monitor 11 except for an insertion port for wiring. The fuel cell system of the present embodiment is configured as described above, so that electromagnetic waves emitted from the power conversion device such as an inverter connected to the fuel cell stack 4 via the fuel cell stack 4 are configured. Even if electromagnetic noise is emitted from the outside of the cell monitor 11 toward the cell monitor 11, this electromagnetic noise can be shielded by the cell monitor cover 20.
またこれとは逆に、 セルモニタ 1 1からの電磁ノィズが外部へ放出される ことも抑制することができる。 したがって、 セルモニタ 1 1やその外部に配 された電子機器の誤動作を抑えて、 燃料電池スタック 4の安定的運転を実現 することができる。  Conversely, electromagnetic noise from the cell monitor 11 can be prevented from being released to the outside. Accordingly, it is possible to suppress the malfunction of the cell monitor 11 and the electronic equipment arranged outside the cell monitor 11 and realize stable operation of the fuel cell stack 4.
ところで、 燃料電池スタック 4からは微量の水素ガスが透過するため、 換 気膜 1 5を設けて換気を行っている。 したがって、 '換気口、 ファン、 ルーバ 一等を設けている場合と同様、 換気膜 1 5から外気が取り込まれるために燃 料電池ケース 1 4内に水蒸気が侵入し、結露水 2 5が発生する可能性がある。 本実施形態においては、 セルモニタカバー 2 0が不透水性でもあるため、 図のように燃料電池ケース 1 4の内壁上面に生じた結露水 2 5が落下した場 合でも、 結露水 2 5が直接セルモニタ 1 1に付着することが抑えられる。 し たがってセルモニタ 1 1の誤動作を防止して燃料電池スタック 4をより安定 的に運転することができる。  By the way, since a small amount of hydrogen gas permeates from the fuel cell stack 4, a ventilation film 15 is provided for ventilation. Therefore, as in the case where a vent, fan, louver, etc. are provided, outside air is taken in from the ventilation membrane 15, so that water vapor enters the fuel cell case 14 and dew condensation water 25 is generated. there is a possibility. In this embodiment, since the cell monitor cover 20 is also impermeable to water, even if the condensed water 25 generated on the upper surface of the inner wall of the fuel cell case 14 falls as shown in the figure, the condensed water 25 Direct adhesion to the cell monitor 1 1 can be suppressed. Therefore, malfunction of the cell monitor 11 can be prevented, and the fuel cell stack 4 can be operated more stably.
なお、 結露を防ぐ方法としては、 燃料電池ケース 1 4を 2重構造とする、 燃料電池ケース 1 4の上面を親水性とし、 ケース 1 4上面を傾斜状態とする ことで、 セルモニタ 1 1上に結露水が落下することを防ぐ、 または、 燃料電 池ケース 1 4内面に断熱材を設ける、 等の方法を採用することができる。 ま た、 結露水がセルモニタ 1 1に付着することを防ぐ方法としては、 セルモニ タ 1 1を不透水性の材料でモールディングする、 といった方法を採用するこ とができる。  As a method of preventing condensation, the fuel cell case 14 has a double structure, the upper surface of the fuel cell case 14 is made hydrophilic, and the upper surface of the case 14 is inclined, so that It is possible to adopt a method such as preventing condensation water from falling or providing a heat insulating material on the inner surface of the fuel cell case 14. In addition, as a method for preventing the condensed water from adhering to the cell monitor 11, a method such as molding the cell monitor 11 with a water-impermeable material can be employed.
次に、 本発明に係る燃料電池システムの他の実施形態と、 この燃料電池シ ステムを搭載した車両の一実施形態について、 図 2及び図 3を参照して説明 する。 以下では、 図 1に示した燃料電池システムとの相違点を中心に説明す るものとする。 Next, another embodiment of the fuel cell system according to the present invention and this fuel cell system An embodiment of a vehicle equipped with a stem will be described with reference to FIGS. The following description focuses on the differences from the fuel cell system shown in FIG.
本実施形態の燃料電池システム及び車両 1 0 0では、 図 2及び図 3に示す ように、 上記の不透水性であって電磁波シールド性の高い導体よりなるセル モニタカバー 2 0と、 例えばステンレスやアルミニウム等の導体よりなる燃 料電池ケース 1 4と力 導通ケーブル 1 2 0を介して電気的に接続されてい る。  In the fuel cell system and vehicle 100 of this embodiment, as shown in FIGS. 2 and 3, the cell monitor cover 20 made of the above-mentioned impermeable and highly electromagnetic shielding conductor, for example, stainless steel or It is electrically connected to a fuel cell case 14 made of a conductor such as aluminum via a force conducting cable 1 20.
また、 燃料電池ケース 1 4は、 車両 1 0 0側の導体部の一つである金属製 の車両フレーム 1 1 0上に不図示の締結ボルト等により固定されている。 以 上により、 本実施形態のセルモニタカバ一 2 0は、 導通ケーブル 1 2 0と燃 料電池ケース 1 4とを介して車両フレーム 1 1 0に導通している。  The fuel cell case 14 is fixed on a metal vehicle frame 110, which is one of the conductor portions on the vehicle 100 side, by fastening bolts (not shown) or the like. As described above, the cell monitor cover 20 of this embodiment is electrically connected to the vehicle frame 110 via the conductive cable 120 and the fuel battery case 14.
このような構成により、 本実施形態の燃料電池システム及ぴそれを搭載し た車両 1 0 0によれば、 セルモニタ 1 1を覆うセルモニタカバー 2 0を、 車 両 1 0 0側の導体部である車両フレーム 1 1 0へ導通部である導通ケープ ル 1 2 0及び燃料電池ケース 1 4を介して接地 (アース） させることができ ので、 上記電磁ノイズの影響を抑制する効果の向上、 さらには安全性の向上 を図ることができる。  With such a configuration, according to the fuel cell system of this embodiment and the vehicle 100 on which the fuel cell system is mounted, the cell monitor cover 20 that covers the cell monitor 11 is connected to the conductor portion on the vehicle 100 side. Since it can be grounded (grounded) to a certain vehicle frame 1 1 0 via a conductive cable 1 2 0 which is a conductive part and a fuel cell case 1 4, the effect of suppressing the influence of the electromagnetic noise is improved, Safety can be improved.
この実施形態では、 セルモニタカバー 2 0は、 車両 1 0 0側の車両フレー ム 1 1 0と導通しているが、 車両 1 0 0側の導体部であれば他の部分、 例え ば車両ボディ 1 1 1と導通していてもよい。 また、 セルモニタカバー 2 0と 車両 1 0 0側の導体部との間には、 燃料電池ケース 1 4の他に又は燃料電池 ケース 1 4に代えて、 燃料電池システムの構成部品のうち導通性を有する部 品を介在させてもよい。  In this embodiment, the cell monitor cover 20 is electrically connected to the vehicle frame 110 on the vehicle 100 side. However, if it is a conductor on the vehicle 100 side, other parts, for example, the vehicle body. 1 1 1 may be electrically connected. In addition to the fuel cell case 14 or in place of the fuel cell case 14, there is no electrical connection between the cell monitor cover 20 and the vehicle 10 0 side conductor. It is possible to interpose a part having
以上の実施形態では、 燃料電池ケース （スタックケース) 1 4内にセルモ ユタ （回路基板） 1 1が設けられているが、 燃料電池ケース 1 4外にセルモ ユタ (回路基板) 1 1およびセルモニタカバー (セルモニタケース) 2 0が 設けられる構成にも本発明は適用可能である。 産業上の利用可能性 In the above embodiment, the cell monitor (circuit board) 1 1 is provided in the fuel cell case (stack case) 14, but the cell battery is outside the fuel cell case 14. The present invention is also applicable to a configuration in which Utah (circuit board) 11 and cell monitor cover (cell monitor case) 20 are provided. Industrial applicability
本発明によれば、 電力変換機器から燃料電池スタックを介して放出される 電磁波等、 回路基板の外部からの電磁ノイズがカバーにより遮蔽されると共 に、 回路基板からの電磁ノイズが外部へ放出されることも抑制される。 した がって、 回路基板やその外部に配された電子機器の誤動作を抑えて、 燃料電 池スタックの安定的運転を実現することができる。  According to the present invention, electromagnetic noise from the outside of the circuit board, such as electromagnetic waves emitted from the power conversion device through the fuel cell stack, is shielded by the cover, and electromagnetic noise from the circuit board is released to the outside. This is also suppressed. Therefore, stable operation of the fuel cell stack can be realized by suppressing malfunctions of the circuit board and electronic devices arranged outside the circuit board.
よって、 本発明は、 そのような要求のある燃料電池システム及び燃料電池 システム搭載車両に広く利用することができる。  Therefore, the present invention can be widely used for fuel cell systems and vehicles equipped with fuel cell systems that have such requirements.

Claims

請求の範囲 The scope of the claims
1 . 複数のセルが積層されてなる燃料電池スタックと、 該燃料電池スタッ クのセル電圧を監視する回路基板と、 前記燃料電池スタックに接続された電 力変換機器とを備えた燃料電池システムにおいて、 1. In a fuel cell system comprising a fuel cell stack in which a plurality of cells are stacked, a circuit board for monitoring a cell voltage of the fuel cell stack, and a power conversion device connected to the fuel cell stack. ,
前記回路基板が電磁波シールド性を有するカバーで覆われている。  The circuit board is covered with a cover having electromagnetic wave shielding properties.
2 · 請求項 1に記載の燃料電池システムにおいて、  2 · In the fuel cell system according to claim 1,
前記カバーは、 前記回路基板の略全面を覆うように設けられている。 The cover is provided so as to cover substantially the entire surface of the circuit board.
3 . 請求項 1又は 2に記載の燃料電池システムにおいて、 3. In the fuel cell system according to claim 1 or 2,
前記カバーは、 更に不透水性を有する。  The cover further has water impermeability.
4 . 請求項 1から 3のいずれかに記載の燃料電池システムが搭載された車 両において、  4. In a vehicle equipped with the fuel cell system according to any one of claims 1 to 3,
前記カバーは、 導通部を介して車両側の導体部と導通している。  The cover is electrically connected to the conductor portion on the vehicle side through the conductive portion.
PCT/JP2006/304196 2005-02-28 2006-02-28 Fuel cell system and vehicle using fuel cell WO2006090922A1 (en)

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JP2009190438A (en) * 2008-02-12 2009-08-27 Nissan Motor Co Ltd On-vehicle structure of fuel cell system
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JP2012256696A (en) * 2011-06-08 2012-12-27 Toshiba Fuel Cell Power Systems Corp Package outer shell, package outer panel for power generator, and power generator
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JP2009146863A (en) * 2007-12-18 2009-07-02 Toyota Motor Corp Fuel battery system
JP2009190438A (en) * 2008-02-12 2009-08-27 Nissan Motor Co Ltd On-vehicle structure of fuel cell system
JP2009298207A (en) * 2008-06-11 2009-12-24 Honda Motor Co Ltd Electric car
JP2012256696A (en) * 2011-06-08 2012-12-27 Toshiba Fuel Cell Power Systems Corp Package outer shell, package outer panel for power generator, and power generator
JP2015023613A (en) * 2013-07-17 2015-02-02 本田技研工業株式会社 Fuel battery vehicle
JP2016081723A (en) * 2014-10-16 2016-05-16 トヨタ自動車株式会社 Inspection method for fuel cell
JP2017059502A (en) * 2015-09-18 2017-03-23 株式会社Ｇｓユアサ Power storage device
US10388916B2 (en) 2015-09-18 2019-08-20 Gs Yuasa International Ltd. Energy storage apparatus
JP2018152163A (en) * 2017-03-10 2018-09-27 トヨタ自動車株式会社 Fuel cell unit
US10953755B2 (en) 2017-03-10 2021-03-23 Toyota Jidosha Kabushiki Kaisha Fuel cell unit
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JP7234276B2 (en) 2021-02-22 2023-03-07 本田技研工業株式会社 fuel cell system
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CA2595091C (en) 2012-01-03
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CN101120476A (en) 2008-02-06
JPWO2006090922A1 (en) 2008-08-07

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