JP6135478B2

JP6135478B2 - Current measuring device

Info

Publication number: JP6135478B2
Application number: JP2013244979A
Authority: JP
Inventors: 山田　貴史; 貴史山田; 山本　隆士; 隆士山本; 栄治平田
Original assignee: Denso Corp
Current assignee: Denso Corp
Priority date: 2013-11-27
Filing date: 2013-11-27
Publication date: 2017-05-31
Anticipated expiration: 2033-11-27
Also published as: JP2015103472A

Description

本発明は、燃料電池を流れる電流を測定する電流測定装置に関するものである。 The present invention relates to a current measuring device that measures a current flowing through a fuel cell.

従来の電流測定装置では、燃料電池の発電面に対向して複数の溝を有する板状部材と、複数の溝内にそれぞれ収納されて燃料電池の発電面と接続される複数の柱状部と、複数の柱状部に流れる電流を柱状部毎に測定する電流測定手段とを備えるものがある（例えば、特許文献１参照）。 In the conventional current measuring device, a plate-like member having a plurality of grooves facing the power generation surface of the fuel cell, a plurality of columnar parts respectively housed in the plurality of grooves and connected to the power generation surface of the fuel cell, Some have current measuring means for measuring current flowing in a plurality of columnar portions for each columnar portion (see, for example, Patent Document 1).

このものにおいて、板状部材において複数の溝にそれぞれ連通する空気通路が設けられており、空気通路を通して複数の溝に空気を供給して複数の柱状部をそれぞれ冷却する。これにより、複数の柱状部の温度上昇を抑制して、電流測定の精度の低下を抑えることができる。 In this structure, an air passage communicating with the plurality of grooves is provided in the plate-like member, and air is supplied to the plurality of grooves through the air passage to cool the plurality of columnar portions. Thereby, the temperature rise of a some columnar part can be suppressed, and the fall of the precision of an electric current measurement can be suppressed.

特開２００６−１２７８３８号公報JP 2006-127838 A

上記特許文献１の電流測定装置では、空気通路を通して複数の溝に供給される空気によって複数の柱状部がそれぞれ冷却することができるものの、空気通路や溝など、複数の柱状部を冷却するための冷却構造を板状部材に設けることが必要になる。 In the current measuring device of Patent Document 1, the plurality of columnar portions can be cooled by the air supplied to the plurality of grooves through the air passage, respectively, but for cooling the plurality of columnar portions such as the air passage and the groove. It is necessary to provide a cooling structure on the plate-like member.

本発明者等は、電流測定装置において、燃料電池を構成する２つのセルのうち一方のセルに接触する第１の電極部と、２つのセルのうち他方のセルに接触する第２の電極部と、前記第１、第２の電極部の間に配置されている抵抗体Ｒａと、第１、第２の電極部の間で抵抗体Ｒａに直列に配置されて抵抗体Ｒｂとからなる電流測定体とを備えるものについて特許出願した（特願２０１２−２４１８３９参照）。 In the current measurement device, the inventors of the present invention provide a first electrode portion that contacts one cell of the two cells constituting the fuel cell, and a second electrode portion that contacts the other cell of the two cells. And a resistor Ra disposed between the first and second electrode portions, and a current composed of the resistor Rb disposed in series with the resistor Ra between the first and second electrode portions. A patent application was filed for a device including a measuring body (see Japanese Patent Application No. 2012-241839).

本特許出願によれば、抵抗体Ｒａに生じる電位差Ｖａと抵抗体Ｒｂに生じる電位差Ｖｂとを検出し、これら検出される電位差Ｖａ、電位差Ｖｂ、および抵抗体Ｒａ、Ｒｂのそれぞれの温度係数を用いて、抵抗体Ｒａ、Ｒｂに流れる電流と抵抗体Ｒａ、Ｒｂの温度とを算出することができる。しかし、抵抗体Ｒａ、Ｒｂに電流が流れることにより、抵抗体Ｒａ、Ｒｂに発熱が生じる。このため、抵抗体Ｒａ、Ｒｂの温度変化を計測して、この測定される温度変化に基づいて温度変化に起因する電流測定誤差を小さくしたり、上述の特許文献１と同様に、抵抗体Ｒａ、Ｒｂを冷却する冷却構造が必要になる。 According to this patent application, the potential difference Va generated in the resistor Ra and the potential difference Vb generated in the resistor Rb are detected, and the detected potential difference Va, the potential difference Vb, and the temperature coefficients of the resistors Ra and Rb are used. Thus, the current flowing through the resistors Ra and Rb and the temperature of the resistors Ra and Rb can be calculated. However, when current flows through the resistors Ra and Rb, the resistors Ra and Rb generate heat. For this reason, the temperature change of the resistors Ra and Rb is measured, and the current measurement error due to the temperature change is reduced based on the measured temperature change. Similarly to the above-mentioned Patent Document 1, the resistor Ra , A cooling structure for cooling Rb is required.

本発明は上記点に鑑みて、簡素な構成で、抵抗体の温度上昇を抑制して燃料電池に流れる電流を高精度に測定する電流測定装置を提供することを目的とする。 An object of the present invention is to provide a current measuring device that measures a current flowing through a fuel cell with high accuracy with a simple configuration while suppressing a temperature rise of a resistor.

上記目的を達成するため、請求項１に記載の発明では、第１、第２の集電板（１１、１２）の間に積層される複数のセル（１０ａ）が酸化剤ガスおよび燃料ガスの電気化学反応により電気エネルギをそれぞれ発生して第１、第２の集電板の間に電流が流れるように構成されている燃料電池（１０）に適用される電流測定装置であって、
複数のセルのうち隣り合う２つのセルのうち一方のセルに接触する第１の電極部（１２０ａ）と、隣り合う２つのセルのうち一方のセル以外の他方のセルに接触する第２の電極部（１２０ｂ）と、
第１、第２の電極部の間に配置されて所定の抵抗値を有する抵抗体（１３１）と、
第１、第２の電極部の間にて抵抗体に電流が流れる際に抵抗体に生じる電位差を測定し、この測定される電位差と抵抗値とに基づいて２つのセルの間の局所に流れる電流を求める測定手段（５０、１６０）と、
抵抗体に接続されて、抵抗体に電流が流れる際に抵抗体に生じる熱を放出する放熱部（１３２ａ、１３２ｂ）と、を備え、
抵抗体および放熱部は、離れて配置されており、
抵抗体および放熱部の間に配置されて抵抗体からの熱を放熱部に伝達させる伝熱経路を構成する接続部（１３３ａ、１３３ｂ）を備え、
第１、第２の電極部の間には、抵抗体としての第１、第２の抵抗体が導通部（１４０ａ、１４０ｂ、１４０ｃ）を通して直列接続されており、
接続部のうち第１、第２の抵抗体のうち一方の抵抗体に接続される接続ヶ所は、抵抗体のうち導通部側に配置されていることを特徴とする。 In order to achieve the above object, according to the first aspect of the present invention, the plurality of cells (10a) stacked between the first and second current collector plates (11, 12) are made of oxidant gas and fuel gas. A current measuring device applied to a fuel cell (10) configured to generate electric energy by an electrochemical reaction and to allow current to flow between first and second current collector plates,
A first electrode part (120a) that contacts one of the two adjacent cells among the plurality of cells, and a second electrode that contacts the other cell other than one of the two adjacent cells Part (120b),
A resistor (131) disposed between the first and second electrode portions and having a predetermined resistance value;
When a current flows through the resistor between the first and second electrode portions, a potential difference generated in the resistor is measured, and the current flows locally between the two cells based on the measured potential difference and the resistance value. Measuring means (50, 160) for determining the current;
It is connected to the resistor, and the heat radiating portion for radiating heat generated in the resistor when a current flows through the resistor (132a, 132b), comprises a,
The resistor and the heat dissipation part are located apart from each other,
A connecting portion (133a, 133b) that is disposed between the resistor and the heat radiating portion and constitutes a heat transfer path that transfers heat from the resistor to the heat radiating portion,
Between the first and second electrode portions, the first and second resistors as resistors are connected in series through the conducting portions (140a, 140b, 140c),
Of the connection parts, the connection point connected to one of the first and second resistors is arranged on the conduction part side of the resistor .

以上により、放熱部といった簡素な構成によって抵抗体を冷却することができる。したがって、簡素な構成で、抵抗体の温度上昇を抑制して、燃料電池に流れる電流を高精度に測定する電流測定装置を提供することができる。 As described above, the resistor can be cooled by a simple configuration such as a heat radiating portion. Therefore, it is possible to provide a current measurement device that measures the current flowing through the fuel cell with high accuracy by suppressing the temperature rise of the resistor with a simple configuration.

請求項３に記載の発明では、第１、第２の集電板（１１、１２）の間に積層される少なくとも１つのセル（１０ａ）が酸化剤ガスおよび燃料ガスの電気化学反応により電気エネルギを発生して第１、第２の集電板の間に電流が流れるように構成されている燃料電池（１０）に適用される電流測定装置であって、
第１、第２の集電板のうち一方の集電板に接触する第１の電極部（１２０ａ）と、一方の集電板に隣り合うセルに接触する第２の電極部（１２０ｂ）と、
第１、第２の電極部の間に配置されて所定の抵抗値を有する抵抗体（１３１）と、
第１、第２の電極部の間にて抵抗体に電流が流れる際に抵抗体に生じる電位差を測定し、この測定される電位差と抵抗値とに基づいて一方の集電板と一方の集電板に隣り合うセルとの間の局所に流れる電流を求める測定手段（５０、１６０）と、
抵抗体に接続されて、抵抗体に電流が流れる際に抵抗体に生じる熱を放出する放熱部（１３２ａ、１３２ｂ）と、を備え、
抵抗体および放熱部は、離れて配置されており、
抵抗体および放熱部の間に配置されて抵抗体からの熱を放熱部に伝達させる伝熱経路を構成する接続部（１３３ａ、１３３ｂ）を備え、
第１、第２の電極部の間には、抵抗体としての第１、第２の抵抗体が導通部（１４０ａ、１４０ｂ、１４０ｃ）を通して直列接続されており、
接続部のうち第１、第２の抵抗体のうち一方の抵抗体に接続される接続ヶ所は、抵抗体のうち導通部側に配置されていることを特徴とする。 In the invention according to claim 3 , at least one cell (10a) stacked between the first and second current collector plates (11, 12) is subjected to electric energy by an electrochemical reaction of an oxidant gas and a fuel gas. A current measuring device applied to a fuel cell (10) configured to generate a current between the first and second current collector plates,
A first electrode portion (120a) that contacts one of the first and second current collector plates, and a second electrode portion (120b) that contacts a cell adjacent to one of the current collector plates ,
A resistor (131) disposed between the first and second electrode portions and having a predetermined resistance value;
When a current flows through the resistor between the first and second electrode portions, a potential difference generated in the resistor is measured. Based on the measured potential difference and the resistance value, one current collecting plate and one current collector are measured. Measuring means (50, 160) for obtaining a current flowing locally between cells adjacent to the electric plate;
It is connected to the resistor, and the heat radiating portion for radiating heat generated in the resistor when a current flows through the resistor (132a, 132b), comprises a,
The resistor and the heat dissipation part are located apart from each other,
A connecting portion (133a, 133b) that is disposed between the resistor and the heat radiating portion and constitutes a heat transfer path that transfers heat from the resistor to the heat radiating portion,
Between the first and second electrode portions, the first and second resistors as resistors are connected in series through the conducting portions (140a, 140b, 140c),
Of the connection parts, the connection point connected to one of the first and second resistors is arranged on the conduction part side of the resistor .

なお、この欄および特許請求の範囲で記載した各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。 In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

本発明の第１実施形態における燃料電池システムの全体構成を示す図である。1 is a diagram illustrating an overall configuration of a fuel cell system according to a first embodiment of the present invention. 図１中の燃料電池、電流測定部材、および制御部（ＥＣＵ）の関係を示す模式図である。It is a schematic diagram which shows the relationship between the fuel cell in FIG. 1, an electric current measurement member, and a control part (ECU). 図１中の電流測定部材の正面図である。It is a front view of the electric current measurement member in FIG. 図３中のＩＶ−ＩＶ断面図である。It is IV-IV sectional drawing in FIG. （ａ）は図４中のＡ−Ａ断面図、（ｂ）は図４中のＢ−Ｂ断面図である。(A) is AA sectional drawing in FIG. 4, (b) is BB sectional drawing in FIG. 図５中の配線層の寸法を示す図である。It is a figure which shows the dimension of the wiring layer in FIG. 比較例における配線層の拡大図である。It is an enlarged view of the wiring layer in a comparative example. 第１実施形態の変形例における配線層の拡大図である。It is an enlarged view of the wiring layer in the modification of 1st Embodiment. 本発明の第２実施形態における配線層を示す図である。It is a figure which shows the wiring layer in 2nd Embodiment of this invention. 本発明の第３実施形態における配線層を示す図である。It is a figure which shows the wiring layer in 3rd Embodiment of this invention. 本発明の第４実施形態における配線層を示す図である。It is a figure which shows the wiring layer in 4th Embodiment of this invention. 第４実施形態における放熱部の面積と温度上昇の関係を示す図である。It is a figure which shows the relationship of the area of a thermal radiation part and temperature rise in 4th Embodiment.

以下、本発明の実施形態について図に基づいて説明する。なお、以下の各実施形態相互において、互いに同一もしくは均等である部分には、説明の簡略化を図るべく、図中、同一符号を付してある。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other are given the same reference numerals in the drawings in order to simplify the description.

（第１実施形態）
以下、本発明の本実施形態について図１〜図５に基づいて説明する。図１は本実施形態に係る燃料電池システム１を示す模式図で、この燃料電池システム１は例えば電気自動車に適用される。 (First embodiment)
Hereinafter, this embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing a fuel cell system 1 according to the present embodiment. The fuel cell system 1 is applied to, for example, an electric vehicle.

図１に示すように、本実施形態の燃料電池システム１は、水素と酸素との電気化学反応を利用して電力を発生する燃料電池１０を備えている。この燃料電池１０は、図示しない電気負荷や２次電池等の電気機器に電力を供給するものである。因みに、電気自動車の場合、車両走行駆動源としての電動モータが電気負荷に相当している。 As shown in FIG. 1, the fuel cell system 1 of this embodiment includes a fuel cell 10 that generates electric power by utilizing an electrochemical reaction between hydrogen and oxygen. The fuel cell 10 supplies electric power to an electric load (not shown) or an electric device such as a secondary battery. Incidentally, in the case of an electric vehicle, an electric motor as a vehicle driving source corresponds to an electric load.

本実施形態では燃料電池１０として固体高分子電解質型燃料電池を用いており、基本単位となるセル１０ａが集電板１１、１２の間に複数積層され、かつ電気的に直列接続されている。 In this embodiment, a solid polymer electrolyte fuel cell is used as the fuel cell 10, and a plurality of cells 10 a serving as a basic unit are stacked between current collector plates 11 and 12 and electrically connected in series.

燃料電池１０の複数のセル１０ａでは、それぞれ、以下の水素と酸素の電気化学反応が起こり電気エネルギが発生する。 In the plurality of cells 10a of the fuel cell 10, the following electrochemical reaction of hydrogen and oxygen occurs to generate electrical energy.

（負極側）Ｈ₂→２Ｈ⁺＋２ｅ^-
（正極側）２Ｈ⁺＋１／２Ｏ₂＋２ｅ^-→Ｈ₂Ｏ
これにより、上記電気化学反応に伴って、複数のセル１０ａを通して集電板１１、１２の間には電流が流れる。集電板１１、１２のうち一方の集電板は、セル１０ａに対してその面方向に分散化して電流を供給し、他方の集電板は、セル１０ａにその面方向に分散して流れる電流を集める。 (Negative electrode side) H ₂ → 2H ⁺ + 2e ⁻
(Positive electrode side) 2H ⁺ + 1 / 2O ₂ + 2e ⁻ → H ₂ O
Thereby, a current flows between the current collecting plates 11 and 12 through the plurality of cells 10a in accordance with the electrochemical reaction. One of the current collector plates 11 and 12 distributes the cell 10a in the surface direction and supplies current, and the other current collector plate flows in the cell 10a in the surface direction. Collect current.

図２は、燃料電池１０の斜視図である。図２に示すように、燃料電池１０には、燃料電池１０のセル１０ａの面内の電流分布を測定するために、板状に形成されている電流測定部材１００が設けられている。電流測定部材１００は、複数のセル１０ａのうち隣り合う２つのセル１０ａに挟まれて配置されており、隣り合う２つのセル１０ａと電気的に直列接続されている。 FIG. 2 is a perspective view of the fuel cell 10. As shown in FIG. 2, the fuel cell 10 is provided with a current measuring member 100 formed in a plate shape in order to measure the current distribution in the surface of the cell 10 a of the fuel cell 10. The current measuring member 100 is disposed between two adjacent cells 10a among the plurality of cells 10a, and is electrically connected in series with the two adjacent cells 10a.

図１の燃料電池システム１には、燃料電池１０の空気極（正極）側に空気（酸素）を供給するための空気流路２０と、燃料電池１０の水素極（負極）側に水素を供給するための水素流路３０が設けられている。ここで、空気流路２０における燃料電池１０より上流側を空気供給流路２０ａといい、下流側を空気排出流路２０ｂという。また、水素流路３０における燃料電池１０より上流側を水素供給流路３０ａといい、下流側を水素排出流路３０ｂという。なお、空気は本発明の酸化剤ガスに相当し、水素は本発明の燃料ガスに相当している。 In the fuel cell system 1 of FIG. 1, hydrogen is supplied to an air flow path 20 for supplying air (oxygen) to the air electrode (positive electrode) side of the fuel cell 10 and to a hydrogen electrode (negative electrode) side of the fuel cell 10. A hydrogen flow path 30 is provided for this purpose. Here, the upstream side of the fuel cell 10 in the air channel 20 is referred to as an air supply channel 20a, and the downstream side is referred to as an air discharge channel 20b. Further, the upstream side of the fuel cell 10 in the hydrogen channel 30 is referred to as a hydrogen supply channel 30a, and the downstream side is referred to as a hydrogen discharge channel 30b. Air corresponds to the oxidant gas of the present invention, and hydrogen corresponds to the fuel gas of the present invention.

空気供給流路２０ａの最上流部には、大気中から吸入した空気を燃料電池１０に圧送するための空気ポンプ２１が設けられ、空気供給流路２０ａにおける空気ポンプ２１と燃料電池１０との間には、空気への加湿を行う加湿器２２が設けられている。また、空気排出流路２０ｂには、燃料電池１０内の空気の圧力を調整するための空気調圧弁２３が設けられている。 An air pump 21 for pressure-feeding air sucked from the atmosphere to the fuel cell 10 is provided at the most upstream portion of the air supply channel 20a, and between the air pump 21 and the fuel cell 10 in the air supply channel 20a. Is provided with a humidifier 22 for humidifying the air. The air discharge passage 20b is provided with an air pressure regulating valve 23 for adjusting the pressure of air in the fuel cell 10.

水素供給流路３０ａの最上流部には、水素が充填された高圧水素タンク３１が設けられ、水素供給流路３０ａにおける高圧水素タンク３１と燃料電池１０との間には、燃料電池１０に供給される水素の圧力を調整するための水素調圧弁３２が設けられている。 A high-pressure hydrogen tank 31 filled with hydrogen is provided at the most upstream portion of the hydrogen supply flow path 30a, and the fuel cell 10 is supplied between the high-pressure hydrogen tank 31 and the fuel cell 10 in the hydrogen supply flow path 30a. A hydrogen pressure regulating valve 32 for adjusting the pressure of the generated hydrogen is provided.

水素排出流路３０ｂには、水素供給流路３０ａにおける水素調圧弁３２の下流側に接続されて閉ループを構成する水素循環流路３０ｃが分岐して設けられており、これにより水素流路３０内で水素を循環させて、未反応の水素を燃料電池１０に再供給するようにしている。そして、水素循環流路３０ｃには、水素流路３０内で水素を循環させるための水素ポンプ３３が設けられている。 The hydrogen discharge passage 30b is provided with a branching hydrogen circulation passage 30c that is connected to the downstream side of the hydrogen pressure regulating valve 32 in the hydrogen supply passage 30a and forms a closed loop. Then, hydrogen is circulated so that unreacted hydrogen is supplied to the fuel cell 10 again. The hydrogen circulation channel 30 c is provided with a hydrogen pump 33 for circulating hydrogen in the hydrogen channel 30.

燃料電池１０は発電効率確保のために運転中一定温度（例えば８０℃程度）に維持する必要がある。このため、燃料電池１０を冷却するための冷却システムが設けられている。冷却システムには、燃料電池１０に冷却水（熱媒体）を循環させる冷却水経路４０、冷却水を循環させるウォータポンプ４１、およびファン４２を備えたラジエータ（放熱器）４３が設けられている。 The fuel cell 10 needs to be maintained at a constant temperature (for example, about 80 ° C.) during operation to ensure power generation efficiency. For this reason, a cooling system for cooling the fuel cell 10 is provided. The cooling system is provided with a cooling water path 40 that circulates the cooling water (heat medium) in the fuel cell 10, a water pump 41 that circulates the cooling water, and a radiator (radiator) 43 that includes a fan 42.

冷却水経路４０には、冷却水をラジエータ５２をバイパスさせるためのバイパス経路４４が設けられている。冷却水経路４０とバイパス経路４４との合流点には、バイパス経路４４に流れる冷却水流量を調整するための流路切替弁４５が設けられている。また、冷却水経路４０における燃料電池１０の出口側近傍には、燃料電池１０から流出した冷却水の温度を検出する温度検出手段としての温度センサ４６が設けられている。この温度センサ４６により冷却水温度Ｗｔを検出することで、燃料電池１０の温度を間接的に検出することができる。 The cooling water path 40 is provided with a bypass path 44 for bypassing the cooling water to the radiator 52. A flow path switching valve 45 for adjusting the flow rate of the cooling water flowing through the bypass path 44 is provided at the junction of the cooling water path 40 and the bypass path 44. Further, a temperature sensor 46 is provided in the vicinity of the outlet side of the fuel cell 10 in the cooling water passage 40 as temperature detecting means for detecting the temperature of the cooling water flowing out from the fuel cell 10. By detecting the coolant temperature Wt by the temperature sensor 46, the temperature of the fuel cell 10 can be indirectly detected.

燃料電池システム１には、各種制御を行う制御部（ＥＣＵ）５０が設けられている。制御部５０は、ＣＰＵ、ＲＯＭ、ＲＡＭ等からなる周知のマイクロコンピュータとその周辺回路にて構成されている。そして、制御部５０は、温度センサ４６の検出温度、および後述する電圧センサ１６０（図４参照）の検出電圧に基づいてセル１０ａの面内における電流分布を検出し、この検出される電流分布に応じて、空気ポンプ２１、加湿器２２、空気調圧弁２３、水素調圧弁３２、水素ポンプ３３、ウォータポンプ４１、流路切替弁４５を制御する。 The fuel cell system 1 is provided with a control unit (ECU) 50 that performs various controls. The control unit 50 is composed of a well-known microcomputer comprising a CPU, ROM, RAM, etc. and its peripheral circuits. Then, the control unit 50 detects the current distribution in the surface of the cell 10a based on the detected temperature of the temperature sensor 46 and the detected voltage of the voltage sensor 160 (see FIG. 4) to be described later. Accordingly, the air pump 21, the humidifier 22, the air pressure regulating valve 23, the hydrogen pressure regulating valve 32, the hydrogen pump 33, the water pump 41, and the flow path switching valve 45 are controlled.

次に、電流測定部材１００について説明する。図３は、電流測定部材１００をセル１０ａの積層方向から視た正面である。図４は、図３中IV−IV断面面である
。 Next, the current measuring member 100 will be described. FIG. 3 is a front view of the current measuring member 100 as viewed from the stacking direction of the cells 10a. 4 is a cross-sectional view taken along the line IV-IV in FIG.

電流測定部材１００は、積層基板から構成されるもので、セル１０ａの面内における電流分布を測定するための複数の電流測定体１１０を構成している。複数の電流測定体１１０は、電流測定部材１００の面方向に分散して配列されている。本実施形態では、（４×７）の電流測定体１１０がマトリクス状に配列されている。複数の電流測定体１１０は、それぞれ、同一の構造を有している。電流測定体１１０は、それぞれ、隣り合う２つのセル１０ａの間の１つの局所の電流を測定可能となっている。そこで、以下、複数の電流測定体１１０のうち１つの電流測定体１１０の構造について説明する。 The current measuring member 100 is composed of a laminated substrate, and constitutes a plurality of current measuring bodies 110 for measuring the current distribution in the plane of the cell 10a. The plurality of current measurement bodies 110 are arranged in a distributed manner in the surface direction of the current measurement member 100. In the present embodiment, (4 × 7) current measuring bodies 110 are arranged in a matrix. Each of the plurality of current measuring bodies 110 has the same structure. Each of the current measuring bodies 110 can measure one local current between two adjacent cells 10a. Therefore, the structure of one current measurement body 110 among the plurality of current measurement bodies 110 will be described below.

電流測定体１１０は、電極膜１２０ａ、１２０ｂ、配線層１３０ａ、１３０ｂ、および、導電部１４０ａ、１４０ｂ、１４０ｃを備える。 The current measuring body 110 includes electrode films 120a and 120b, wiring layers 130a and 130b, and conductive portions 140a, 140b, and 140c.

電極膜１２０ａ、１２０ｂは、それぞれ、銅等の導電性金属からなる薄膜状に形成されている。電極膜１２０ａ、１２０ｂは、それぞれ、セル１０ａの面方向に平行に形成されている。電極膜１２０ｂは、隣り合う２つのセル１０ａのうちプラス電極側セル１０ａ（すなわち、電流流れ方向上流側のセル１０ａ）に接触している。電極膜１２０ａは、隣り合う２つのセル１０ａのうちマイナス電極側セル１０ａ（すなわち、電流流れ方向下流側のセル１０ａ）に接触している。 The electrode films 120a and 120b are each formed in a thin film shape made of a conductive metal such as copper. The electrode films 120a and 120b are each formed in parallel to the surface direction of the cell 10a. The electrode film 120b is in contact with the positive electrode side cell 10a (that is, the cell 10a on the upstream side in the current flow direction) of the two adjacent cells 10a. The electrode film 120a is in contact with the negative electrode side cell 10a (that is, the cell 10a on the downstream side in the current flow direction) of the two adjacent cells 10a.

配線層１３０ａ、１３０ｂは、それぞれ、銅等の導電性金属からなる薄膜状に形成されている。配線層１３０ａ、１３０ｂは、それぞれ、セル１０ａの面方向に平行に形成されている。配線層１３０ａは、電極膜１２０ａ側に配置されている。配線層１３０ｂは、電極膜１２０ｂ側に配置されている。配線層１３０ａは、導電部１４０ａによって電極膜１２０ａに接続されている。配線層１３０ａは、導電部１４０ｂによって配線層１３０ｂに接続されている。配線層１３０ｂは、導電部１４０ｃによって電極膜１２０ｂに接続されている。 The wiring layers 130a and 130b are each formed in a thin film shape made of a conductive metal such as copper. The wiring layers 130a and 130b are each formed in parallel to the surface direction of the cell 10a. The wiring layer 130a is disposed on the electrode film 120a side. The wiring layer 130b is disposed on the electrode film 120b side. The wiring layer 130a is connected to the electrode film 120a by the conductive portion 140a. The wiring layer 130a is connected to the wiring layer 130b by the conductive portion 140b. The wiring layer 130b is connected to the electrode film 120b by the conductive portion 140c.

図５（ａ）は図４中Ａ−Ａ断面図である。図６は配線層１３０ａの構造の詳細および寸法を示す図である。 FIG. 5A is a cross-sectional view taken along the line AA in FIG. FIG. 6 shows details and dimensions of the structure of the wiring layer 130a.

配線層１３０ａは、抵抗体１３１、放熱部１３２ａ、１３２ｂ、および接続部１３３ａ、１３３ｂを備える。抵抗体１３１は、抵抗端子部１３１ａ、１３１ｃ、および抵抗本体１３１ｂから構成されてＨ字状に形成されている。抵抗端子部１３１ａ、抵抗本体１３１ｂ、および抵抗端子部１３１ｃは、それぞれ、紙面垂直方向から視て長方形状に形成されている。紙面垂直方向は、電極膜１２０ａ、１２０ｂが並ぶ積層方向である。図６中の鎖線は、説明の便宜上、抵抗端子部１３１ａ、１３１ｃ、および抵抗本体１３１ｂを区別するために設けられたものである。 The wiring layer 130a includes a resistor 131, heat radiation parts 132a and 132b, and connection parts 133a and 133b. The resistor 131 includes resistor terminal portions 131a and 131c and a resistor main body 131b, and is formed in an H shape. The resistance terminal portion 131a, the resistance main body 131b, and the resistance terminal portion 131c are each formed in a rectangular shape when viewed from the direction perpendicular to the paper surface. The direction perpendicular to the paper surface is the stacking direction in which the electrode films 120a and 120b are arranged. The chain line in FIG. 6 is provided to distinguish the resistance terminal portions 131a and 131c and the resistance main body 131b for convenience of explanation.

抵抗端子部１３１ａおよび抵抗端子部１３１ｃは、平行に配置されている。抵抗端子部１３１ａの長手方向中央部および抵抗端子部１３１ｃの長手方向中央部の間に抵抗本体１３１ｂが配置されている。抵抗本体１３１ｂは、所定の抵抗値を有するものである。抵抗本体１３１ｂは、その長手方向が抵抗端子部１３１ａ（および抵抗端子部１３１ｃ）の長手方向に直交している。抵抗端子部１３１ａには、導電部１４０ｂが接続されている。抵抗端子部１３１ｃには、導電部１４０ａが接続されている。 The resistance terminal portion 131a and the resistance terminal portion 131c are arranged in parallel. A resistance main body 131b is disposed between the longitudinal center portion of the resistance terminal portion 131a and the longitudinal direction center portion of the resistance terminal portion 131c. The resistor main body 131b has a predetermined resistance value. The resistance body 131b has a longitudinal direction orthogonal to the longitudinal direction of the resistance terminal portion 131a (and the resistance terminal portion 131c). The conductive portion 140b is connected to the resistance terminal portion 131a. A conductive portion 140a is connected to the resistance terminal portion 131c.

放熱部１３２ａ、１３２ｂは、それぞれ紙面垂直方向から視て長方形状に形成されている。放熱部１３２ａ、１３２ｂは、それぞれの長手方向が抵抗本体１３１ｂの長手方向に平行になっている。放熱部１３２ａは、抵抗体１３１の短手方向一方側（図示下側）に配置されている。放熱部１３２ｂは、抵抗体１３１の短手方向他方側（図示上側）に配置されている。放熱部１３２ａ、１３２ｂは、抵抗端子部１３１ａおよび抵抗端子部１３１ｃの間に配置されている。短手方向は、長手方向に直交する方向である。 Each of the heat dissipating parts 132a and 132b is formed in a rectangular shape when viewed from the direction perpendicular to the paper surface. Each of the heat dissipating parts 132a and 132b has a longitudinal direction parallel to the longitudinal direction of the resistor main body 131b. The heat dissipating part 132a is arranged on one side (the lower side in the drawing) of the resistor 131 in the short direction. The heat dissipating part 132b is disposed on the other side (upper side in the drawing) of the resistor 131 in the short direction. The heat radiation parts 132a and 132b are disposed between the resistance terminal part 131a and the resistance terminal part 131c. The short direction is a direction orthogonal to the long direction.

抵抗本体１３１ｂの長手方向一方側と電圧センサ１６０との間には、信号線１５０ａが接続され、抵抗本体１３１ｂの長手方向他方側と電圧センサ１６０との間には信号線１５０ｂが接続されている。 A signal line 150 a is connected between one side in the longitudinal direction of the resistor body 131 b and the voltage sensor 160, and a signal line 150 b is connected between the other side in the longitudinal direction of the resistor body 131 b and the voltage sensor 160. .

図６に示すように、放熱部１３２ａ、１３２ｂは、抵抗体１３１の抵抗本体１３１ｂに対して離して配置されている。接続部１３３ａは、抵抗体１３１の抵抗本体１３１ｂと放熱部１３２ａとの間に配置されて、抵抗本体１３１ｂからの熱を放熱部１３２ａに伝える伝熱経路を構成する。 As shown in FIG. 6, the heat radiating portions 132 a and 132 b are arranged away from the resistor main body 131 b of the resistor 131. The connecting portion 133a is disposed between the resistance main body 131b of the resistor 131 and the heat radiating portion 132a, and constitutes a heat transfer path that transfers heat from the resistance main body 131b to the heat radiating portion 132a.

具体的には、接続部１３３ａは、接続経路部１４０および経路端部１４１、１４２を備える。接続経路部１４０は、紙面垂直方向から視て細長い長方形状に形成されて、抵抗本体１３１ｂ（或いは、放熱部１３２ａ）に対して平行になるように配置されている。経路端部１４１は、接続経路部１４０と抵抗本体１３１ｂとを接続している。経路端部１４１は、抵抗本体１３１ｂの電流流れ方向の中央部側に位置する。つまり、接続部１３３ａのうち抵抗本体１３１ｂに接続される接続ヵ所は、抵抗本体１３１ｂの電流流れ方向の中央部側に位置する。経路端部１４２は、接続経路部１４０および放熱部１３２ａの間を接続している。経路端部１４２は、抵抗本体１３１ｂの電流流れ方向の上流側（すなわち、正極側）に位置する。 Specifically, the connection portion 133a includes a connection route portion 140 and route end portions 141 and 142. The connection path part 140 is formed in an elongated rectangular shape when viewed from the direction perpendicular to the paper surface, and is arranged to be parallel to the resistor main body 131b (or the heat radiating part 132a). The path end 141 connects the connection path 140 and the resistor main body 131b. The path end 141 is located on the center side in the current flow direction of the resistor main body 131b. In other words, the connection portion of the connection portion 133a that is connected to the resistor main body 131b is located on the center side in the current flow direction of the resistor main body 131b. The path end part 142 connects the connection path part 140 and the heat radiating part 132a. The path end 142 is located on the upstream side (that is, the positive electrode side) of the resistance main body 131b in the current flow direction.

このことにより、接続部１３３ａのうち接続経路部１４０を熱が伝わる方向（図５中矢印Ｙｄ）は、抵抗本体１３１ｂの電流流れ方向（図５中矢印Ｙｃ）に対して逆方向になる。 Thereby, the direction (arrow Yd in FIG. 5) in which heat is transmitted through the connection path portion 140 in the connection portion 133a is opposite to the current flow direction (arrow Yc in FIG. 5) of the resistor body 131b.

ここで、図６に示すように、接続部１３３ａのうち幅方向寸法（Ｌ１）は、抵抗本体１３１ｂのうちの電流流れ方向の寸法（Ｌ３）よりも小さく、かつ放熱部１３２ａのうちの電流流れ方向の寸法（Ｌ２）よりも小さい。 Here, as shown in FIG. 6, the dimension (L1) in the width direction of the connection part 133a is smaller than the dimension (L3) in the current flow direction of the resistance body 131b, and the current flow in the heat dissipation part 132a. It is smaller than the dimension (L2) in the direction.

放熱部１３２ｂは、接続部１３３ａと同様に、接続経路部１４０、および経路端部１４１、１４２から構成されている。放熱部１３２ｂは、接続部１３３ａに対して中心線Ｓ１（図６参照）に対して線対称に形成されている。中心線Ｓ１は、放熱部１３２ａ、１３２ｂの間の中間位置において図６中左右方向に延びる仮想線（一点鎖線）である。 The heat dissipating part 132b is composed of a connection path part 140 and path end parts 141 and 142, similarly to the connection part 133a. The heat radiating part 132b is formed symmetrically with respect to the center line S1 (see FIG. 6) with respect to the connecting part 133a. The center line S1 is an imaginary line (one-dot chain line) extending in the left-right direction in FIG. 6 at an intermediate position between the heat radiating portions 132a and 132b.

図５（ｂ）は図４中Ｂ−Ｂ断面図である。配線層１３０ｂは、配線層１３０ａと同様に、抵抗体１３１、放熱部１３２ａ、１３２ｂ、および接続部１３３ａ、１３３ｂを備える。配線層１３０ｂの抵抗体１３１の抵抗端子部１３１ａには、導電部１４０ｃが接続されている。配線層１３０ｂの抵抗体１３１の抵抗端子部１３１ｃには、導電部１４０ｂが接続されている。 FIG. 5B is a cross-sectional view taken along the line BB in FIG. Similar to the wiring layer 130a, the wiring layer 130b includes a resistor 131, heat radiation parts 132a and 132b, and connection parts 133a and 133b. A conductive portion 140c is connected to the resistance terminal portion 131a of the resistor 131 of the wiring layer 130b. The conductive portion 140b is connected to the resistance terminal portion 131c of the resistor 131 of the wiring layer 130b.

このように構成される電流測定体１１０では、複数の電極膜１２０ａおよび複数の電極膜１２０ｂの間には絶縁層１４９が充填されている。絶縁層１４９としては、エポキシ樹脂等の電気絶縁材料によって構成されている。 In the current measuring body 110 configured as described above, an insulating layer 149 is filled between the plurality of electrode films 120a and the plurality of electrode films 120b. The insulating layer 149 is made of an electrically insulating material such as an epoxy resin.

本実施形態では、電流測定体１１０、電圧センサ１６０、および制御部５０が本発明の係る電流測定装置を構成している。 In the present embodiment, the current measuring body 110, the voltage sensor 160, and the control unit 50 constitute a current measuring device according to the present invention.

次に、電流測定部材１００による電流測定方法について説明する。 Next, a current measurement method using the current measurement member 100 will be described.

まず、燃料電池１０に対する水素および空気の供給が開始されることで、燃料電池１０の複数のセル１０ａで発電が開始される。電流測定部材１００の複数の電流測定体１１０では、電流測定部材１００を挟む２つのセル１０ａのうち電流流れ方向上流側のセル１０ａから電極膜１２０ｂに電流が流れる。 First, by starting the supply of hydrogen and air to the fuel cell 10, power generation is started in the plurality of cells 10 a of the fuel cell 10. In the plurality of current measuring bodies 110 of the current measuring member 100, a current flows from the cell 10a on the upstream side in the current flow direction of the two cells 10a sandwiching the current measuring member 100 to the electrode film 120b.

したがって、複数の電流測定体１１０では、電流が電極膜１２０ｂ→導電部１４０ｃ→配線層１３０ｂ→導電部１４０ｂ→配線層１３０ｂ→導電部１４０ｃ→電極膜１２０ａの順に流れる。 Therefore, in the plurality of current measuring bodies 110, current flows in the order of electrode film 120b → conductive portion 140c → wiring layer 130b → conductive portion 140b → wiring layer 130b → conductive portion 140c → electrode film 120a.

このとき、配線層１３０ｂの抵抗体１３１に電流が図５中矢印Ｙａの如く流れる。そして、この電流は導電部１４０ｂを矢印Ｙｂの如く流れ、その電流は、図５中矢印Ｙｃの如く、配線層１３０ａ抵抗体１３１に流れる。 At this time, a current flows through the resistor 131 of the wiring layer 130b as shown by an arrow Ya in FIG. Then, this current flows through the conductive portion 140b as indicated by an arrow Yb, and the current flows through the wiring layer 130a resistor 131 as indicated by an arrow Yc in FIG.

ここで、配線層１３０ａ、１３０ｂの抵抗体１３１に電流が流れる際に抵抗体１３１に熱が発生する。抵抗体１３１からの熱が接続部１３３ａを通して放熱部１３２ａから放熱される。さらに、抵抗体１３１からの熱が接続部１３３ｂを通して放熱部１３２ｂから放熱される。 Here, heat is generated in the resistor 131 when a current flows through the resistor 131 in the wiring layers 130a and 130b. Heat from the resistor 131 is radiated from the heat radiation part 132a through the connection part 133a. Further, heat from the resistor 131 is radiated from the heat radiating part 132b through the connection part 133b.

抵抗体１３１から接続部１３３ａ、１３３ｂの接続経路部１４０に熱が伝達される方向は、抵抗体１３１の電流流れ方向（図５（ａ）、（ｂ）中矢印Ｙａ、Ｙｃ参照）と逆方向になる。このため、抵抗体１３１から接続部１３３ａを通して放熱部１３２ａには電流が流れない。抵抗体１３１から接続部１３３ｂを通して放熱部１３２ｂには電流が流れない。 The direction in which heat is transferred from the resistor 131 to the connection path portion 140 of the connection portions 133a and 133b is opposite to the current flow direction of the resistor 131 (see arrows Ya and Yc in FIGS. 5A and 5B). become. For this reason, no current flows from the resistor 131 to the heat dissipating part 132a through the connecting part 133a. No current flows from the resistor 131 to the heat dissipating part 132b through the connecting part 133b.

このように配線層１３０ａの抵抗体１３１に電流が流れることにより、抵抗体１３１に電位差Ｖａが発生する。この発生した電位差Ｖａを電圧センサ１６０が測定する。制御部５０は、配線層１３０ａの抵抗体１３１の抵抗値Ｒａと電位差Ｖａとによって抵抗体１３１に流れる電流Ｉａを求める。 Thus, when a current flows through the resistor 131 of the wiring layer 130a, a potential difference Va is generated in the resistor 131. The voltage sensor 160 measures the generated potential difference Va. The control unit 50 obtains a current Ia flowing through the resistor 131 based on the resistance value Ra of the resistor 131 and the potential difference Va of the wiring layer 130a.

以上説明した本実施形態によれば、燃料電池システム１は、複数のセルのうち隣り合う２つのセルのうち一方のセルに接触する電極部１２０ａと、前記隣り合う２つのセルのうち他方のセルに接触する第２の電極部１２０ｂと、電極部１２０ａ、１２０ｂの間に配置されて抵抗体１３１と、抵抗体１３１に生じる電位差Ｖａを測定する電圧センサ１６０と、この測定される電位差と抵抗体１３１の抵抗値とに基づいて２つのセルの間の局所に流れる電流を求める制御部５０と、抵抗体１３１に接続されて、抵抗体１３１に電流が流れる際に抵抗体１３１に生じる熱を放出する放熱部１３２ａ、１３２ｂと、抵抗体１３１からの熱を放熱部１３２ａ、１３２ｂに伝達させる伝熱経路を構成する接続部１３３ａ、１３３ｂとを備える。 According to this embodiment described above, the fuel cell system 1 includes an electrode part 120a that contacts one cell of two adjacent cells among a plurality of cells, and the other cell of the two adjacent cells. A second electrode portion 120b in contact with the resistor, a resistor 131 disposed between the electrode portions 120a and 120b, a voltage sensor 160 for measuring a potential difference Va generated in the resistor 131, and the measured potential difference and the resistor. Based on the resistance value of 131, the controller 50 obtains the current that flows locally between the two cells, and is connected to the resistor 131 to release heat generated in the resistor 131 when the current flows through the resistor 131. The heat dissipating parts 132a and 132b to be connected and the connection parts 133a and 133b constituting heat transfer paths for transferring the heat from the resistor 131 to the heat dissipating parts 132a and 132b are provided.

したがって、放熱部１３２ａ、１３２ｂおよび接続部１３３ａ、１３３ｂといった簡素な冷却部材によって抵抗体１３１から発生する熱を放熱することができる。 Therefore, heat generated from the resistor 131 can be radiated by simple cooling members such as the heat radiating portions 132a and 132b and the connecting portions 133a and 133b.

本実施形態では、放熱部１３２ａ、１３２ｂおよび接続部１３３ａ、１３３ｂによって抵抗体１３１から発生する熱を放熱する。したがって、抵抗体１３１の温度上昇を抑制することができる。このため、抵抗体１３１を用いて電流を測定する際に、抵抗体１３１の温度変化に起因する電流測定誤差が小さくなる。これにより、広い範囲の電流を測定することができる。 In the present embodiment, heat generated from the resistor 131 is radiated by the heat radiating portions 132a and 132b and the connecting portions 133a and 133b. Therefore, the temperature rise of the resistor 131 can be suppressed. For this reason, when the current is measured using the resistor 131, the current measurement error due to the temperature change of the resistor 131 is reduced. As a result, a wide range of currents can be measured.

本実施形態では、電流測定部材１００において、電極部１２０ａ、１２０ｂ、および抵抗体１３１が積層されている。抵抗体１３１および放熱部１３２ａ、１３２ｂは、同一層に形成されている。このため、電流測定部材１００のうち積層方向の寸法を小さくすることができる。積層方向は、電極部１２０ａ、１２０ｂの並ぶ方向である。 In the present embodiment, in the current measuring member 100, the electrode portions 120a and 120b and the resistor 131 are laminated. The resistor 131 and the heat radiation parts 132a and 132b are formed in the same layer. For this reason, the dimension of the lamination direction among the current measurement members 100 can be made small. The stacking direction is a direction in which the electrode portions 120a and 120b are arranged.

本実施形態では、接続部１３３ａ、１３３ｂは、接続経路部１４０に熱が伝達する方向が抵抗体１３１の電流流れ方向に対して逆方向になるように伝熱経路が構成されている。 In the present embodiment, the connection parts 133 a and 133 b are configured to have a heat transfer path so that the direction of heat transfer to the connection path part 140 is opposite to the current flow direction of the resistor 131.

一方、図７に示すように、抵抗体１３１および放熱部１３２ａ（１３２ｂ）の間にて抵抗体１３１に平行に接続部１３３ａ（１３３ｂ）を配置することも考えられる。この場合、接続部１３３ａ（１３３ｂ）のうち抵抗体１３１に接続される接続ヵ所の電流流れ方向の第１寸法と放熱部１３２ａ（１３２ｂ）の電流流れ方向の第２寸法とが同じになる。これにより、図５の抵抗体１３１に比べて、抵抗体１３１の抵抗本体１３１ｂの電流経路の幅寸法が大きくなり、抵抗体１３１の抵抗値が低下する。図７中の鎖線は、説明の便宜上、抵抗体１３１、放熱部１３２ａ、１３２ｂ、および接続部１３３ａ、１３３ｂを区別するための設けたものである。 On the other hand, as shown in FIG. 7, it is conceivable to arrange a connecting portion 133a (133b) between the resistor 131 and the heat radiating portion 132a (132b) in parallel with the resistor 131. In this case, the first dimension in the current flow direction of the connection portion 133a (133b) connected to the resistor 131 is the same as the second dimension in the current flow direction of the heat radiating portion 132a (132b). As a result, the width dimension of the current path of the resistor main body 131b of the resistor 131 is larger than the resistor 131 of FIG. 5, and the resistance value of the resistor 131 is reduced. The chain line in FIG. 7 is provided to distinguish the resistor 131, the heat radiating parts 132a and 132b, and the connecting parts 133a and 133b for convenience of explanation.

なお、抵抗体１３１において、抵抗値をＲとし、電流経路の幅寸法をＳとし、電流経路の長さをＬとし、電気抵抗率をρとすると、次の数式１が成立する。 In the resistor 131, when the resistance value is R, the width dimension of the current path is S, the length of the current path is L, and the electrical resistivity is ρ, the following Equation 1 is established.

Ｒ＝ρ・Ｌ／Ｓ・・・・・・・（数式１）
このため、抵抗体１３１の電流経路の幅寸法が大きくなると抵抗値が小さくなる。 R = ρ · L / S ········ (Formula 1)
For this reason, when the width dimension of the current path of the resistor 131 is increased, the resistance value is decreased.

これに対して、本実施形態では、上述の如く、接続部１３３ａ、１３３ｂは、接続経路部１４０（すなわち、伝熱経路）に熱が伝達する方向が抵抗体１３１の電流流れ方向に対して逆方向になるように伝熱経路が構成されている。これにより、抵抗体１３１側から接続部１３３ａ、１３３ｂを通して放熱部１３２ａ、１３２ｂに電流が流れないようにすることができる。つまり、接続部１３３ａ、１３３ｂおよび放熱部１３２ａ、１３２ｂに起因して抵抗体１３１の抵抗値が低下しない。 On the other hand, in the present embodiment, as described above, in the connection portions 133a and 133b, the direction in which heat is transferred to the connection path portion 140 (that is, the heat transfer path) is opposite to the current flow direction of the resistor 131. The heat transfer path is configured to be in the direction. Thereby, it is possible to prevent current from flowing from the resistor 131 side to the heat radiating portions 132a and 132b through the connecting portions 133a and 133b. That is, the resistance value of the resistor 131 does not decrease due to the connection parts 133a and 133b and the heat radiation parts 132a and 132b.

上記第１実施形態では、接続部１３３ａ、１３３ｂに熱が伝達する方向が抵抗体１３１の電流流れ方向に対して逆方向になるように接続部１３３ａ、１３３ｂを構成した例について説明したが、これに代えて、次のようにしてもよい。 In the first embodiment, the example in which the connecting portions 133a and 133b are configured so that the direction of heat transfer to the connecting portions 133a and 133b is opposite to the current flow direction of the resistor 131 has been described. Instead of this, the following may be used.

すなわち、図８に示すように、接続部１３３ａ、１３３ｂの伝熱経路に熱が伝達する方向が抵抗体１３１の電流流れ方向に対して交差するように接続部１３３ａ、１３３ｂを構成してもよい。この場合も、抵抗体１３１側から接続部１３３ａ、１３３ｂを通して放熱部１３２ａ、１３２ｂに電流が流れないようにすることができる。つまり、接続部１３３ａ、１３３ｂおよび放熱部１３２ａ、１３２ｂに起因して抵抗体１３１の抵抗値が低下しない。 That is, as shown in FIG. 8, the connecting portions 133a and 133b may be configured such that the direction in which heat is transferred to the heat transfer paths of the connecting portions 133a and 133b intersects the current flow direction of the resistor 131. . Also in this case, it is possible to prevent current from flowing from the resistor 131 side to the heat radiating portions 132a and 132b through the connecting portions 133a and 133b. That is, the resistance value of the resistor 131 does not decrease due to the connection parts 133a and 133b and the heat radiation parts 132a and 132b.

また、本発明の実施にあたり、上述の如く、抵抗体１３１の抵抗値が低下するものの、図７に示すように、抵抗体１３１および放熱部１３２ａ（１３２ｂ）の間にて抵抗体１３１に平行に接続部１３３ａ（１３３ｂ）を配置してもよい。 In implementing the present invention, as described above, although the resistance value of the resistor 131 decreases, as shown in FIG. 7, the resistor 131 and the heat dissipating part 132a (132b) are parallel to the resistor 131 as shown in FIG. The connecting portion 133a (133b) may be disposed.

上記第１実施形態では、接続部１３３ａ、１３３ｂは、接続経路部１４０に熱が伝達する方向を抵抗体１３１の電流流れ方向に対して逆方向になるように伝熱経路が構成して、抵抗体１３１側から接続部１３３ａ、１３３ｂを通して放熱部１３２ａ、１３２ｂに電流が流れないようにした例について説明したが、これに代えて、次のようにしてもよい。すなわち、接続部１３３ａ、１３３ｂの抵抗値を抵抗体の抵抗値よりも大きくなるように構成することにより、抵抗体１３１側から接続部１３３ａ、１３３ｂを通して放熱部１３２ａ、１３２ｂに電流が流れないようにすることができる。 In the first embodiment, the connection parts 133a and 133b are configured such that the heat transfer path is configured so that the direction of heat transfer to the connection path part 140 is opposite to the current flow direction of the resistor 131. Although an example in which no current flows from the body 131 side to the heat radiating parts 132a and 132b through the connection parts 133a and 133b has been described, the following may be used instead. That is, by configuring the connection parts 133a and 133b so that the resistance value is larger than the resistance value of the resistor, current does not flow from the resistor 131 side to the heat radiation parts 132a and 132b through the connection parts 133a and 133b. can do.

（第２実施形態）
上記第１実施形態では、配線層１３０ａ、１３０ｂにおいて、接続部１３３ａのうち抵抗本体１３１ｂに接続される接続ヶ所を抵抗本体１３１ｂのうち電流流れ方向中央部に配置した例について説明したが、これに代えて、本実施形態では、配線層１３０ａ、１３０ｂでは、抵抗本体１３１ｂのうち電流流れ方向の導電部１４０ｂ側に接続部１３３ａ、１３３ｂを配置した例について説明する。 (Second Embodiment)
In the first embodiment, in the wiring layers 130a and 130b, the connection portion connected to the resistance main body 131b in the connection portion 133a has been described in the central portion of the resistance main body 131b in the current flow direction. Instead, in the present embodiment, in the wiring layers 130a and 130b, an example in which the connection parts 133a and 133b are arranged on the conductive part 140b side in the current flow direction in the resistance body 131b will be described.

図９に本発明の第２実施形態における配線層１３０ａ、１３０ｂを示す図である。 FIG. 9 is a diagram showing wiring layers 130a and 130b in the second embodiment of the present invention.

本実施形態では、接続部１３３ａ、１３３ｂが抵抗本体１３１ｂのうち電流流れ方向の導電部１４０ｂ側に位置する。つまり、接続部１３３ａ、１３３ｂのうち抵抗本体１３１ｂに接続される接続ヵ所が抵抗本体１３１ｂのうち電流流れ方向の導電部１４０ｂ側に位置する。これは、導電部１４０ｂは配線層１３０ａ、１３０ｂに跨るように配置されているので、抵抗本体１３１ｂのうち電流流れ方向中央部よりも、抵抗本体１３１ｂのうち導電部１４０ｂ側の方が温度が高くなるためである。このため、抵抗体１３１の抵抗本体１３１ｂを効率的に冷却することができる。 In the present embodiment, the connecting portions 133a and 133b are located on the conductive portion 140b side in the current flow direction of the resistor main body 131b. That is, the connection part connected to the resistance main body 131b among the connection parts 133a and 133b is located on the conductive part 140b side in the current flow direction of the resistance main body 131b. This is because the conductive part 140b is arranged so as to straddle the wiring layers 130a and 130b, and therefore the temperature of the resistance body 131b on the conductive part 140b side is higher than that of the central part of the resistance body 131b in the current flow direction. It is to become. For this reason, the resistance main body 131b of the resistor 131 can be efficiently cooled.

（第３実施形態）
上記第１実施形態では、抵抗端子部１３１ａ、１３１ｃの間に放熱部１３２ａ（１３２ｂ）を配置した例について説明したが、これに代えて、本実施形態では、次のように、放熱部１３２ａを配置した例について説明する。 (Third embodiment)
In the first embodiment, the example in which the heat dissipating part 132a (132b) is disposed between the resistance terminal parts 131a and 131c has been described. Instead, in the present embodiment, the heat dissipating part 132a is provided as follows. An example of arrangement will be described.

図１０に本実施形態の電流測定部材１００の３層の拡大図を示す。図１０には、複数の配線層１３０ａのうち隣り合う２つの配線層１３０ａを示す。 FIG. 10 shows an enlarged view of three layers of the current measuring member 100 of the present embodiment. FIG. 10 shows two adjacent wiring layers 130a among the plurality of wiring layers 130a.

複数の配線層１３０ａは、それぞれ、抵抗体１３１、接続部１３３ａ、および放熱部１３２ａを備える。抵抗体１３１は、接続部１３３ａを通して放熱部１３２ａに接続されている。 Each of the plurality of wiring layers 130a includes a resistor 131, a connection portion 133a, and a heat dissipation portion 132a. The resistor 131 is connected to the heat radiation part 132a through the connection part 133a.

本実施形態では、上記隣り合う２つの電極膜１２０ａのうち一方の電極膜１２０ａに抵抗体１３１および接続部１３３ａを通して接続される放熱部１３２ａは、上記隣り合う２つの電極膜１２０ａのうち一方の電極膜１２０ａ以外の他方の電極膜１２０ａに対して紙面垂直方向から視て重なるように配置されている。紙面垂直方向は、電極膜１２０ａ、１２０ｂが重なる積層方向である。図１０中、鎖線は、電極膜１２０ａの領域を示している。 In the present embodiment, the heat dissipating part 132a connected to one electrode film 120a of the two adjacent electrode films 120a through the resistor 131 and the connection part 133a is one electrode of the two adjacent electrode films 120a. The other electrode film 120a other than the film 120a is disposed so as to overlap when viewed from the direction perpendicular to the paper surface. The direction perpendicular to the paper surface is the stacking direction in which the electrode films 120a and 120b overlap. In FIG. 10, a chain line indicates a region of the electrode film 120a.

以上説明した本実施形態では、上記隣り合う２つの電極膜１２０ａのうち一方の電極膜１２０ａに接続される放熱部１３２ａは、上記隣り合う２つの電極膜１２０ａのうち他方の電極膜１２０ａに対して紙面垂直方向から視て重なるように配置されている。このため、上記隣り合う２つの電極膜１２０ａのうち他方の電極膜１２０ａ側のスペースを有効利用して放熱部１３２ａを配置することができる。したがって、電流測定部材１００の面方向の大きさを小さくすることができる。 In the present embodiment described above, the heat dissipating part 132a connected to one of the two adjacent electrode films 120a is connected to the other of the two adjacent electrode films 120a. They are arranged so as to overlap when viewed from the direction perpendicular to the page. For this reason, the heat radiating part 132a can be arranged by effectively using the space on the other electrode film 120a side of the two adjacent electrode films 120a. Therefore, the size of the current measuring member 100 in the surface direction can be reduced.

（第４実施形態）
上記第１実施形態では、抵抗体１３１の幅方向一方側に１つの放熱部１３２ａを配置し、かつ抵抗体１３１の幅方向他方側に１つの放熱部１３２ｂを配置した例について説明したが、これに代えて、本実施形態では、抵抗体１３１に２つの放熱部１３２ａと２つの放熱部１３２ｂとを配置する例について説明する。 (Fourth embodiment)
In the first embodiment, the example in which one heat radiating portion 132a is arranged on one side in the width direction of the resistor 131 and one heat radiating portion 132b is arranged on the other side in the width direction of the resistor 131 has been described. Instead of this, in the present embodiment, an example in which two heat radiating portions 132a and two heat radiating portions 132b are arranged in the resistor 131 will be described.

図１１に本実施形態の配線層１３０ａの拡大図を示す。 FIG. 11 shows an enlarged view of the wiring layer 130a of the present embodiment.

２つの放熱部１３２ａは、抵抗体１３１の抵抗本体１３１ｂに対して幅方向一方側に配置されている。抵抗本体１３１ｂの幅方向とは、抵抗本体１３１ｂに電流が流れる方向に直交する方向のことである。 The two heat radiating portions 132a are arranged on one side in the width direction with respect to the resistance main body 131b of the resistor 131. The width direction of the resistor main body 131b is a direction orthogonal to the direction in which a current flows through the resistor main body 131b.

２つの放熱部１３２ａは、それぞれ、抵抗体１３１の抵抗本体１３１ｂに対して接続部１３３ａを介して接続されている。２つの放熱部１３２ａは、抵抗体１３１の電流流れ方向に並べられている。２つの放熱部１３２ｂは、抵抗体１３１の抵抗本体１３１ｂに対して幅方向他方側に配置されている。２つの放熱部１３２ｂは、抵抗体１３１の電流流れ方向に並べられている。２つの放熱部１３２ｂは、それぞれ、抵抗体１３１の抵抗本体１３１ｂに対して接続部１３３ｂを介して接続されている。 The two heat radiating portions 132a are respectively connected to the resistor main body 131b of the resistor 131 via the connecting portion 133a. The two heat radiating portions 132 a are arranged in the current flow direction of the resistor 131. The two heat radiating portions 132b are arranged on the other side in the width direction with respect to the resistance main body 131b of the resistor 131. The two heat radiating portions 132b are arranged in the current flow direction of the resistor 131. The two heat radiating portions 132b are respectively connected to the resistance main body 131b of the resistor 131 through the connection portion 133b.

以上説明した本実施形態によれば、抵抗体１３１には、２つの放熱部１３２ａおよび２つの放熱部１３２ｂが接続されている。これにより、抵抗体１３１に接続される放熱部（１３２ａ、１３２ｂ）の総面積を増加することができる。 According to the present embodiment described above, the resistor 131 is connected to the two heat dissipating parts 132a and the two heat dissipating parts 132b. Thereby, the total area of the thermal radiation part (132a, 132b) connected to the resistor 131 can be increased.

図１２は、放熱部の総面積と温度上昇係数ａとの関係を示すグラフである。
温度上昇係数は、温度変化をΔＴ、抵抗体１３１に流れる電流をＩとして、ΔＴ＝ａ×Ｉ²としたときの係数ａ［℃／Ａ²]である。図１２から温度上昇係数ａが小さいほど、放熱部１３２ａ、１３２ｂの温度が上昇し難いことが分かる。 FIG. 12 is a graph showing the relationship between the total area of the heat radiating portion and the temperature increase coefficient a.
The temperature increase coefficient is a coefficient a [° C./A ² ] where ΔT = a × I ² where ΔT is the temperature change and I is the current flowing through the resistor 131. It can be seen from FIG. 12 that as the temperature increase coefficient a is smaller, the temperature of the heat radiating portions 132a and 132b is less likely to increase.

（他の実施形態）
上記第１〜第４実施形態では、配線層１３０ａ、１３０ｂのそれぞれに、抵抗体１３１を構成した例について説明したが、これに代えて、配線層１３０ａ、１３０ｂのうちいずれか一方に、抵抗体１３１を構成してもよい。 (Other embodiments)
In the first to fourth embodiments, the example in which the resistor 131 is configured in each of the wiring layers 130a and 130b has been described. However, instead of this, a resistor is provided in any one of the wiring layers 130a and 130b. 131 may be configured.

上記第１〜第４実施形態では、配線層１３０ａ、１３０ｂのそれぞれの抵抗体１３１に対して放熱部１３２ａ、１３２ｂを接続したが、これに代えて、配線層１３０ａ、１３０ｂのうち一方の配線層１３０ａの抵抗体１３１に対して放熱部１３２ａ、１３２ｂを接続してもよい。 In the first to fourth embodiments, the heat radiating portions 132a and 132b are connected to the respective resistors 131 of the wiring layers 130a and 130b. Instead, one wiring layer of the wiring layers 130a and 130b is used. The heat radiating portions 132a and 132b may be connected to the resistor 131 of 130a.

上記第１〜第４実施形態では、配線層１３０ａの抵抗体１３１に生じる電位差を電圧センサ１６０によって測定した例について説明したが、これに代えて、次の（ａ）、（ｂ）、（ｃ）のようにしてもよい。 In the first to fourth embodiments, the example in which the potential difference generated in the resistor 131 of the wiring layer 130a is measured by the voltage sensor 160 has been described. Instead, the following (a), (b), (c ).

（ａ）配線層１３０ａの抵抗体１３１に生じる電位差と配線層１３０ｂの抵抗体１３１に生じる電位差とを合わせた電位差を１つの電圧センサ１６０によって測定する。例えば、導電部１４０ａ、１４０ｃの間の電位差を１つの電圧センサ１６０によって測定する。 (A) One voltage sensor 160 measures a potential difference obtained by combining a potential difference generated in the resistor 131 of the wiring layer 130a and a potential difference generated in the resistor 131 of the wiring layer 130b. For example, the potential difference between the conductive parts 140a and 140c is measured by one voltage sensor 160.

（ｂ）電極膜１２０ａ、１２０ｂの間の電位差を１つの電圧センサ１６０によって測定する。 (B) The potential difference between the electrode films 120a and 120b is measured by one voltage sensor 160.

（ｃ）配線層１３０ｂの抵抗体１３１に生じる電位差を電圧センサ１６０によって測定する。 (C) The potential difference generated in the resistor 131 of the wiring layer 130b is measured by the voltage sensor 160.

（ｄ）配線層１３０ａの抵抗体１３１に生じる電位差と配線層１３０ｂの抵抗体１３１に生じる電位差とを電圧センサ１６０によって別々に測定して、この測定された電位差の平均値を用いて電流を算出する。 (D) The potential difference generated in the resistor 131 of the wiring layer 130a and the potential difference generated in the resistor 131 of the wiring layer 130b are separately measured by the voltage sensor 160, and the current is calculated using the average value of the measured potential difference. To do.

上記第１〜第４実施形態では、電流測定部材１００において、電流流れ下流側の１層目を複数の電極膜１２０ａによって構成した例について説明したが、これに代えて、複数の電流測定体１１０に対して共通した１枚の電極膜１２０ａを用いて電流測定部材１００を構成してもよい。 In the first to fourth embodiments, the example in which the first layer on the downstream side of the current flow is configured by the plurality of electrode films 120a in the current measurement member 100 has been described, but instead, a plurality of current measurement bodies 110 are provided. Alternatively, the current measuring member 100 may be configured by using a single electrode film 120a common to the above.

上記第１〜第４の実施形態では、電流測定部材１００を隣り合う２つのセル１０ａの間に配置した例について説明したが、これに代えて、集電板１１、１２のうち一方の集電板と、この一方の集電板に隣り合うセル１０ａとの間に電流測定部材１００を配置してもよい。以下、前記一方の集電板に隣り合うセル１０ａを隣り合うセル１０ａという。 In the first to fourth embodiments, the example in which the current measuring member 100 is disposed between two adjacent cells 10a has been described. Instead, one of the current collecting plates 11 and 12 is collected. The current measuring member 100 may be disposed between the plate and the cell 10a adjacent to the one current collecting plate. Hereinafter, the cells 10a adjacent to the one current collector plate are referred to as adjacent cells 10a.

この場合、前記一方の集電板および隣り合うセル１０ａのうち、正極側の部材に複数の電極膜１２０ｂが接続され、前記一方の集電板および隣り合うセル１０ａのうち、負極側の部材に複数の電極膜１２０ａが接続されている。 In this case, among the one current collecting plate and the adjacent cell 10a, a plurality of electrode films 120b are connected to the positive electrode side member, and among the one current collecting plate and the adjacent cell 10a, the negative electrode side member is connected. A plurality of electrode films 120a are connected.

上記第１〜第４の実施形態では、複数のセル１０ａから燃料電池１０を構成した例について説明したが、これに代えて、集電板１１、１２の間に１つのセル１０ａだけを配置して燃料電池１０を構成してもよい。 In the first to fourth embodiments, the example in which the fuel cell 10 is configured from a plurality of cells 10a has been described, but instead, only one cell 10a is disposed between the current collector plates 11 and 12. The fuel cell 10 may be configured.

この場合、集電板１１、１２のうち一方の集電板とセル１０ａとの間に電流測定部材１００を配置することになる。このため、前記一方の集電板およびセル１０ａのうち、正極側の部材に複数の電極膜１２０ｂが接続され、前記一方の集電板およびセル１０ａのうち、負極側の部材に複数の電極膜１２０ａが接続されている。 In this case, the current measuring member 100 is disposed between one of the current collector plates 11 and 12 and the cell 10a. Therefore, a plurality of electrode films 120b are connected to a positive electrode side member of the one current collector plate and the cell 10a, and a plurality of electrode films are connected to a negative electrode side member of the one current collector plate and the cell 10a. 120a is connected.

上記第１〜第４の実施形態では、配線層間を接続する導電部として、スルーホールを用いた例について説明したが、これに代えて、レーザービアを用いてもよい。これにより基板の表面において電極部に生じる穴を無くすことができる。 In the first to fourth embodiments, the example in which the through hole is used as the conductive portion connecting the wiring layers has been described, but a laser via may be used instead. Thereby, the hole which arises in the electrode part in the surface of a board | substrate can be eliminated.

上記第１〜第４の実施形態では、電流測定部材１００において複数の電流測定体１１０をマトリクス状に配列した例について説明したが、電極部１２０ａ、１２０ｂの間の抵抗値が電流測定体１１０毎に同等になるように構成されていれば、複数の電流測定体１１０をマトリックス状にしなくてもよく、また複数の電流測定体１１０を同一の形状にしなくてもよい。 In the first to fourth embodiments, the example in which the plurality of current measurement bodies 110 are arranged in a matrix in the current measurement member 100 has been described. However, the resistance value between the electrode portions 120a and 120b is different for each current measurement body 110. If it is comprised so that it may become equivalent to these, the several electric current measurement bodies 110 do not need to be made into a matrix form, and the several electric current measurement bodies 110 do not need to be made into the same shape.

なお、本発明は上記した実施形態に限定されるものではなく、特許請求の範囲に記載した範囲内において適宜変更が可能である。また、上記各実施形態は、互いに無関係なものではなく、組み合わせが明らかに不可な場合を除き、適宜組み合わせが可能である。 In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible.

１燃料電池システム
１０燃料電池
１０ａセル
１００電流測定部材
１１０電流測定体
１２０ａ、１２０ｂ電極膜
１３０ａ、１３０ｂ配線層
１３１抵抗体
１３２ａ、１３２ｂ放熱部
１３３ａ、１３３ｂ接続部
１４０ａ、１４０ｂ、１４０ｃ導電部
１４０伝熱経路部
１４１、１４２経路端部
１３１ｂ抵抗本体
１３１ａ、１３１ｃ抵抗端子部
１５０電気絶縁層 DESCRIPTION OF SYMBOLS 1 Fuel cell system 10 Fuel cell 10a Cell 100 Current measurement member 110 Current measurement body 120a, 120b Electrode film 130a, 130b Wiring layer 131 Resistor 132a, 132b Heat radiation part 133a, 133b Connection part 140a, 140b, 140c Conductive part 140 Heat transfer Path part 141, 142 Path end part 131b Resistor body 131a, 131c Resistance terminal part 150 Electrical insulation layer

Claims

The plurality of cells (10a) stacked between the first and second current collecting plates (11, 12) generate electric energy by the electrochemical reaction of the oxidant gas and the fuel gas, respectively, thereby generating the first and second current collector plates (11, 12). A current measuring device applied to a fuel cell (10) configured to allow current to flow between two current collector plates,
A first electrode part (120a) that contacts one of the two adjacent cells of the plurality of cells, and a second electrode that contacts the other cell other than the one of the two adjacent cells. Two electrode portions (120b);
A resistor (131) disposed between the first and second electrode portions and having a predetermined resistance value;
A potential difference generated in the resistor when a current flows between the first and second electrode portions when the current flows in the resistor is measured. Based on the measured potential difference and the resistance value, the two cells Measuring means (50, 160) for determining the current flowing between
Wherein connected to the resistor, the heat dissipation unit for dissipating heat generated in the resistor when a current flows in the resistor and (132a, 132b), comprises a,
The resistor and the heat dissipating part are arranged apart from each other,
A connecting portion (133a, 133b) that is disposed between the resistor and the heat radiating portion and constitutes a heat transfer path that transfers heat from the resistor to the heat radiating portion;
Between the first and second electrode portions, the first and second resistors as the resistor are connected in series through conduction portions (140a, 140b, 140c),
A current measuring device , wherein a connection point connected to one of the first and second resistors among the connecting portions is disposed on the conductive portion side of the resistors. .

The plurality of cells (10a) stacked between the first and second current collecting plates (11, 12) generate electric energy by the electrochemical reaction of the oxidant gas and the fuel gas, respectively, thereby generating the first and second current collector plates (11, 12). A current measuring device applied to a fuel cell (10) configured to allow current to flow between two current collector plates,
A first electrode part (120a) that contacts one of the two adjacent cells of the plurality of cells, and a second electrode that contacts the other cell other than the one of the two adjacent cells. Two electrode portions (120b);
A resistor (131) disposed between the first and second electrode portions and having a predetermined resistance value;
A potential difference generated in the resistor when a current flows between the first and second electrode portions when the current flows in the resistor is measured. Based on the measured potential difference and the resistance value, the two cells Measuring means (50, 160) for determining the current flowing between
Wherein connected to the resistor, the heat dissipation unit for dissipating heat generated in the resistor when a current flows in the resistor and (132a, 132b), comprises a,
The resistor and the heat dissipating part are arranged apart from each other,
A connecting portion (133a, 133b) that is disposed between the resistor and the heat radiating portion and constitutes a heat transfer path that transfers heat from the resistor to the heat radiating portion;
A plurality of the first electrode portions are arranged in parallel between the first and second current collector plates,
Of the plurality of first electrode portions, the heat radiating portion connected to any one first electrode portion via the resistor and the connection portion is the first electrode portion of the plurality of first electrode portions. Of these , the current measuring device is arranged so as to overlap the first electrode portion adjacent to the one first electrode portion in the arrangement direction of the first and second current collector plates. .

At least one cell (10a) stacked between the first and second current collector plates (11, 12) generates electric energy by an electrochemical reaction of an oxidant gas and a fuel gas, thereby generating the first and second current collector plates (11, 12). A current measuring device applied to a fuel cell (10) configured to allow current to flow between two current collector plates,
The first, the first electrode portion and (120a), a second electrode portion in contact with the cell adjacent to the current collector plate of the one in contact with one of the current collector plate of the second collector plate ( 120b)
A resistor (131) disposed between the first and second electrode portions and having a predetermined resistance value;
A potential difference generated in the resistor when a current flows through the resistor between the first and second electrode portions is measured, and the one current collector is based on the measured potential difference and the resistance value. Measuring means (50, 160) for determining a locally flowing current between the plate and the cell adjacent to the one current collecting plate;
Wherein connected to the resistor, the and the heat radiating portion for resistor releasing heat generated in the resistor when a current flows in the (132a, 132b), Bei give a,
The resistor and the heat dissipating part are arranged apart from each other,
A connecting portion (133a, 133b) that is disposed between the resistor and the heat radiating portion and constitutes a heat transfer path that transfers heat from the resistor to the heat radiating portion;
Between the first and second electrode portions, the first and second resistors as the resistor are connected in series through conduction portions (140a, 140b, 140c),
A current measuring device , wherein a connection point connected to one of the first and second resistors among the connecting portions is disposed on the conductive portion side of the resistors. .

At least one cell (10a) stacked between the first and second current collector plates (11, 12) generates electric energy by an electrochemical reaction of an oxidant gas and a fuel gas, thereby generating the first and second current collector plates (11, 12). A current measuring device applied to a fuel cell (10) configured to allow current to flow between two current collector plates,
The first, the first electrode portion and (120a), a second electrode portion in contact with the cell adjacent to the current collector plate of the one in contact with one of the current collector plate of the second collector plate ( 120b)
A resistor (131) disposed between the first and second electrode portions and having a predetermined resistance value;
A potential difference generated in the resistor when a current flows through the resistor between the first and second electrode portions is measured, and the one current collector is based on the measured potential difference and the resistance value. Measuring means (50, 160) for determining a locally flowing current between the plate and the cell adjacent to the one current collecting plate;
Wherein connected to the resistor, the heat dissipation unit for dissipating heat generated in the resistor when a current flows in the resistor and (132a, 132b), comprises a,
The resistor and the heat dissipating part are arranged apart from each other,
A connecting portion (133a, 133b) that is disposed between the resistor and the heat radiating portion and constitutes a heat transfer path that transfers heat from the resistor to the heat radiating portion;
A plurality of the first electrode portions are arranged in parallel between the first and second current collector plates,
Of the plurality of first electrode portions, the heat radiating portion connected to any one first electrode portion via the resistor and the connection portion is the first electrode portion of the plurality of first electrode portions. Of these , the current measuring device is arranged so as to overlap the first electrode portion adjacent to the one first electrode portion in the arrangement direction of the first and second current collector plates. .

The first and second electrode portions and the resistor are stacked,
The resistor and the heat radiation member, the current measuring device according to any one of claims 1 to 4, characterized in that formed in the same layer.

The current measurement device according to claim 5 , wherein the heat transfer path is configured such that no current flows from the resistor side to the heat dissipation portion through the connection portion.

The connection portion is configured so that the heat transfer path is configured so that the direction of heat transfer to the heat transfer path is opposite to the current flow direction of the resistor, whereby the connection from the resistor side. The current measuring device according to claim 6 , wherein the heat transfer path is configured so that current does not flow to the heat radiating part through the part.

By configuring the connection portion so that the resistance value is larger than the resistance value of the resistor, the connection portion is configured so that no current flows from the resistor side to the heat dissipation portion through the connection portion. The current measuring device according to claim 6 .

Two or more of the heat radiating portion is a current measuring device according to any one of claims 1 to 8, characterized in that connected to the resistor, respectively, via the connecting portion.