JP2015122149A - Fuel gas leak detector and fuel battery vehicle - Google Patents
Fuel gas leak detector and fuel battery vehicle Download PDFInfo
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- JP2015122149A JP2015122149A JP2013263941A JP2013263941A JP2015122149A JP 2015122149 A JP2015122149 A JP 2015122149A JP 2013263941 A JP2013263941 A JP 2013263941A JP 2013263941 A JP2013263941 A JP 2013263941A JP 2015122149 A JP2015122149 A JP 2015122149A
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- 239000002737 fuel gas Substances 0.000 title claims abstract description 102
- 239000000446 fuel Substances 0.000 title claims abstract description 60
- 230000007423 decrease Effects 0.000 claims abstract description 38
- 238000001514 detection method Methods 0.000 claims abstract description 28
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000010248 power generation Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 136
- 239000001257 hydrogen Substances 0.000 abstract description 114
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 114
- 238000000034 method Methods 0.000 abstract description 17
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- 150000002431 hydrogen Chemical class 0.000 abstract 1
- 230000005856 abnormality Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
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- 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
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Abstract
Description
本発明は燃料電池車両の燃料ガスタンクからの燃料ガス漏れを検知する技術に関する。 The present invention relates to a technique for detecting fuel gas leakage from a fuel gas tank of a fuel cell vehicle.
特許文献１には、車両の高圧タンク近傍に水素濃度センサが設けられており、水素の充填時に高圧タンクのタンク本体から水素が漏れた場合、水素が漏れていることを、水素濃度センサによって判定できる点が記載されている。 In Patent Document 1, a hydrogen concentration sensor is provided in the vicinity of a high-pressure tank of a vehicle. When hydrogen leaks from the tank body of the high-pressure tank when hydrogen is charged, the hydrogen concentration sensor determines that hydrogen is leaking. The points that can be done are described.
また、特許文献２には、外部の水素ガスステーションから供給される水素ガスを車両の高圧タンク内へ充填する際に、高圧タンク内の圧力変化速度値が異常判定閾値以上である場合に、水素ガスステーションに異常があると判定して、高圧タンク内への水素ガスの充填を止める点が記載されている。 Further, in Patent Document 2, when hydrogen gas supplied from an external hydrogen gas station is filled into a high-pressure tank of a vehicle, if the pressure change rate value in the high-pressure tank is equal to or higher than an abnormality determination threshold, It is described that it is determined that there is an abnormality in the gas station and the filling of hydrogen gas into the high-pressure tank is stopped.
しかし、上記技術では次のような問題があった。
すなわち、特許文献１に記載の技術では、車両の高圧タンクから水素が漏れていた場合に、このような水素漏れを検知することができるが、そのためには車両の高圧タンク近傍に水素濃度センサを設ける必要があった。
However, the above technique has the following problems.
That is, in the technology described in Patent Document 1, when hydrogen leaks from the high-pressure tank of the vehicle, such hydrogen leakage can be detected. For this purpose, a hydrogen concentration sensor is installed in the vicinity of the high-pressure tank of the vehicle. It was necessary to install.
また、特許文献２に記載の技術では、車両の高圧タンクから水素が漏れていたとしても、このような水素漏れを検知することができないという問題があった。
なお、外部の水素ガスステーションに水素濃度センサを設けることも考えられるが、車両が水素ガスステーションを離れると、車両の高圧タンクからの水素漏れを検知することはできない。
Further, the technique described in Patent Document 2 has a problem that even if hydrogen leaks from the high-pressure tank of the vehicle, such hydrogen leak cannot be detected.
Although it is conceivable to provide a hydrogen concentration sensor in an external hydrogen gas station, when the vehicle leaves the hydrogen gas station, hydrogen leakage from the high-pressure tank of the vehicle cannot be detected.
本発明は、このような課題に鑑みなされたものであり、その目的とするところは、燃料電池車両の燃料ガスタンク近傍に燃料ガス濃度センサを設けなくても、燃料ガスタンクからの燃料ガス漏れを検知可能な技術を提供することにある。 The present invention has been made in view of such a problem, and an object of the present invention is to detect a fuel gas leak from the fuel gas tank without providing a fuel gas concentration sensor in the vicinity of the fuel gas tank of the fuel cell vehicle. It is to provide possible technology.
本発明によれば、燃料ガスタンク内の温度および燃料ガスタンク内の圧力に基づいて燃料ガスタンク内の燃料ガスが減少する速度である「燃料ガス減少速度」を算出し、算出された燃料ガス減少速度の値が燃料ガスタンクからの燃料ガス漏れの有無を判定するための閾値よりも大きいか否かを判定し、燃料ガス減少速度の値が閾値よりも大きい場合に燃料ガスタンクで燃料ガス漏れが発生していると判定するので、燃料電池車両の燃料ガスタンク近傍に燃料ガス濃度センサを設けなくても、燃料ガスタンクからの燃料ガス漏れを検知するができる。 According to the present invention, based on the temperature in the fuel gas tank and the pressure in the fuel gas tank, the “fuel gas decrease rate” that is the rate at which the fuel gas in the fuel gas tank decreases is calculated, and the calculated fuel gas decrease rate is calculated. It is determined whether or not the value is larger than a threshold value for determining whether or not there is a fuel gas leak from the fuel gas tank, and if the fuel gas decrease rate value is larger than the threshold value, a fuel gas leak has occurred in the fuel gas tank. Therefore, the fuel gas leakage from the fuel gas tank can be detected without providing a fuel gas concentration sensor near the fuel gas tank of the fuel cell vehicle.
以下に本発明の実施形態を図面とともに説明する。なお、本発明は下記実施形態に限定されるものではなく、以下のような様々な態様にて実施することが可能である。
［１．燃料電池車両１の構成の説明］
図１に示す本実施形態の燃料電池車両１は、含酸素の空気と燃料ガスを燃料電池に供給し、これによって発電した電力を利用して電動機を駆動することにより走行する車両である。
Embodiments of the present invention will be described below with reference to the drawings. In addition, this invention is not limited to the following embodiment, It is possible to implement in the following various aspects.
[1. Description of Configuration of Fuel Cell Vehicle 1]
A fuel cell vehicle 1 according to the present embodiment shown in FIG. 1 is a vehicle that travels by supplying oxygen-containing air and fuel gas to the fuel cell and driving an electric motor using electric power generated thereby.
このため、燃料電池車両１は、燃料ガスタンクとしての水素タンク１１、水素充填制御ＥＣＵ１３、燃料電池１５、燃料電池ＥＣＵ１７などを備えている。
水素タンク１１は、燃料電池１５に供給される燃料ガスとしての水素ガスを貯蔵する。なお、水素タンク１１には、水素ステーション１００の水素充填ノズル１０１が接続可能であり、水素タンク１１は、水素充填ノズル１０１を介して水素ステーション１００からの水素ガスの供給を受けることができる。また、水素タンク１１は、水素タンク１１内の温度の値を検出する温度センサ１９と、水素タンク１１内の圧力の値を検出する圧力センサ２１と、を備えている。
Therefore, the fuel cell vehicle 1 includes a hydrogen tank 11 as a fuel gas tank, a hydrogen filling control ECU 13, a fuel cell 15, a fuel cell ECU 17, and the like.
The hydrogen tank 11 stores hydrogen gas as fuel gas supplied to the fuel cell 15. Note that a hydrogen filling nozzle 101 of the hydrogen station 100 can be connected to the hydrogen tank 11, and the hydrogen tank 11 can receive supply of hydrogen gas from the hydrogen station 100 via the hydrogen filling nozzle 101. The hydrogen tank 11 includes a temperature sensor 19 that detects a temperature value in the hydrogen tank 11 and a pressure sensor 21 that detects a pressure value in the hydrogen tank 11.
水素充填制御ＥＣＵ１３は、温度センサ１９から水素タンク１１内の温度の値を定期的に取得するとともに、圧力センサ２１から水素タンク１１内の圧力の値を定期的に取得する。 The hydrogen filling control ECU 13 periodically acquires the value of the temperature in the hydrogen tank 11 from the temperature sensor 19 and periodically acquires the value of the pressure in the hydrogen tank 11 from the pressure sensor 21.
また、水素充填制御ＥＣＵ１３は、水素タンク１１内の水素ガスが減少する速度である「燃料ガス減少速度」を算出する。具体的には、水素充填制御ＥＣＵ１３は、取得した水素タンク１１内の温度の値および水素タンク１１内の圧力の値を用いて水素タンク１１内の水素ガスの残量を所定時間ごとに算出し、その算出した水素タンク１１内の水素ガスの残量が所定時間内に減少した量と所定時間から、水素タンク１１内の水素ガスが減少する速度である「燃料ガス減少速度」を算出する。さらに、水素充填制御ＥＣＵ１３は、算出された燃料ガス減少速度の値が水素漏れ検出閾値よりも大きいか否かを判定し、燃料ガス減少速度の値が水素漏れ検出閾値よりも大きい場合に水素タンク１１で燃料ガス漏れが発生していると判定する。 Further, the hydrogen filling control ECU 13 calculates a “fuel gas decrease rate” that is a rate at which the hydrogen gas in the hydrogen tank 11 decreases. Specifically, the hydrogen filling control ECU 13 calculates the remaining amount of hydrogen gas in the hydrogen tank 11 at predetermined time intervals using the acquired temperature value in the hydrogen tank 11 and pressure value in the hydrogen tank 11. From the calculated amount of hydrogen gas remaining in the hydrogen tank 11 decreased within a predetermined time and a predetermined time, a “fuel gas decrease rate”, which is a rate at which the hydrogen gas in the hydrogen tank 11 decreases, is calculated. Further, the hydrogen filling control ECU 13 determines whether or not the calculated fuel gas decrease rate value is greater than a hydrogen leak detection threshold value, and if the fuel gas decrease rate value is greater than the hydrogen leak detection threshold value, the hydrogen tank 11 determines that a fuel gas leak has occurred.
なお、水素漏れ検出閾値とは、燃料ガスタンクとしての水素タンク１１からの水素漏れの有無を判定するために予め設定されており、燃料電池１５が発電中である場合に水素タンク１１からの水素漏れの有無を判定するための閾値Ａ（第一閾値）と燃料電池１５が発電中でない場合に水素タンク１１からの水素漏れの有無を判定するための閾値Ｂ（第二閾値）とがある。なお、図３は、水素タンク１１の水素充填率と経過時間との関係を示している。これによれば、燃料電池１５が発電中である場合には、燃料電池１５が発電中ではない場合に比べて、水素タンク１１の水素充填率が減少する速度の値が大きいのがわかる。つまり、燃料電池１５が発電中である場合には、燃料電池１５が発電中ではない場合に比べて、燃料ガス減少速度の値も大きくなる。したがって、本実施形態では、水素漏れ検出閾値については、燃料電池１５が発電中である場合と燃料電池１５が発電中ではない場合とで変更するようにしている。 The hydrogen leak detection threshold is set in advance to determine whether or not hydrogen leaks from the hydrogen tank 11 as a fuel gas tank. When the fuel cell 15 is generating power, the hydrogen leak from the hydrogen tank 11 is detected. There is a threshold value A (first threshold value) for determining the presence or absence of hydrogen and a threshold value B (second threshold value) for determining the presence or absence of hydrogen leakage from the hydrogen tank 11 when the fuel cell 15 is not generating power. FIG. 3 shows the relationship between the hydrogen filling rate of the hydrogen tank 11 and the elapsed time. According to this, it can be seen that when the fuel cell 15 is generating power, the value of the speed at which the hydrogen filling rate of the hydrogen tank 11 decreases is larger than when the fuel cell 15 is not generating power. That is, when the fuel cell 15 is generating power, the value of the fuel gas decrease rate is larger than when the fuel cell 15 is not generating power. Therefore, in this embodiment, the hydrogen leak detection threshold is changed between when the fuel cell 15 is generating power and when the fuel cell 15 is not generating power.
なお、水素充填制御ＥＣＵ１３は、タンク内温度値取得部、タンク内圧力値取得部、燃料ガス減少速度算出部、燃料ガス漏れ判定部、燃料電池状態判定部および燃料ガス漏れ報知部に該当するとともに、燃料ガス漏れ検出装置に該当する。 The hydrogen filling control ECU 13 corresponds to a tank temperature value acquisition unit, a tank pressure value acquisition unit, a fuel gas decrease rate calculation unit, a fuel gas leak determination unit, a fuel cell state determination unit, and a fuel gas leak notification unit. This corresponds to a fuel gas leak detection device.
燃料電池１５は、含酸素の空気と燃料ガスとしての水素ガスを用いて発電し、発電した
電力を電動機（図示省略）に供給する機能を有する。そのために、燃料電池１５は、バルブ２３ａを内蔵する水素供給配管２３によって水素タンク１１と接続されており、バルブ２３ａを制御して水素供給配管２３を開閉させることで水素タンク１１からの水素ガスの供給量を制御するようになっている（バルブ開閉、発電制御）。
The fuel cell 15 has a function of generating electric power using oxygen-containing air and hydrogen gas as a fuel gas, and supplying the generated electric power to an electric motor (not shown). For this purpose, the fuel cell 15 is connected to the hydrogen tank 11 by a hydrogen supply pipe 23 having a built-in valve 23a. By controlling the valve 23a to open and close the hydrogen supply pipe 23, hydrogen gas from the hydrogen tank 11 is supplied. The supply amount is controlled (valve opening / closing, power generation control).
燃料電池ＥＣＵ１７は、燃料電池１５を制御する機能を有する。また、燃料電池ＥＣＵ１７は、燃料電池１５が発電中であるか否かを水素充填制御ＥＣＵ１３に通知する機能を有する。 The fuel cell ECU 17 has a function of controlling the fuel cell 15. The fuel cell ECU 17 has a function of notifying the hydrogen filling control ECU 13 whether or not the fuel cell 15 is generating power.
なお、燃料電池車両１におけるその他の機能や構成については公知技術に従うので、ここではその詳細な説明は省略する。
［２．水素漏れ検知処理の説明］
次に、燃料電池車両１の水素充填制御ＥＣＵ１３が実行する水素漏れ検知処理を、図２のフローチャートを参照して説明する。
Since other functions and configurations in the fuel cell vehicle 1 are in accordance with known techniques, a detailed description thereof is omitted here.
[2. Explanation of hydrogen leak detection process]
Next, the hydrogen leak detection process executed by the hydrogen filling control ECU 13 of the fuel cell vehicle 1 will be described with reference to the flowchart of FIG.
最初のステップＳ１１０では、水素タンク１１内の水素ガスが減少する速度である「燃料ガス減少速度」を算出する。具体的には、水素充填制御ＥＣＵ１３は、温度センサ１９から水素タンク１１内の温度を定期的に取得するとともに、圧力センサ２１から水素タンク１１内の圧力を定期的に取得しており、取得した水素タンク１１内の温度の値および水素タンク１１内の圧力の値を用いて水素タンク１１内の水素ガスの残量を所定時間ごとに算出し、その算出した水素タンク１１内の水素ガスの残量が所定時間内に減少した値と所定時間から、水素タンク１１内の水素ガスが減少する速度である「燃料ガス減少速度」を算出する。その後、Ｓ１２０に移行する。 In the first step S110, a “fuel gas decrease rate”, which is a rate at which the hydrogen gas in the hydrogen tank 11 decreases, is calculated. Specifically, the hydrogen filling control ECU 13 periodically acquires the temperature in the hydrogen tank 11 from the temperature sensor 19 and periodically acquires the pressure in the hydrogen tank 11 from the pressure sensor 21. Using the temperature value in the hydrogen tank 11 and the pressure value in the hydrogen tank 11, the remaining amount of hydrogen gas in the hydrogen tank 11 is calculated every predetermined time, and the calculated remaining hydrogen gas in the hydrogen tank 11 is calculated. The “fuel gas decrease rate”, which is the rate at which the hydrogen gas in the hydrogen tank 11 decreases, is calculated from the value of the amount decreased within the predetermined time and the predetermined time. Thereafter, the process proceeds to S120.
Ｓ１２０では、燃料電池１５が発電中であるか否かを判断する。具体的には、燃料電池ＥＣＵ１７が、燃料電池１５が発電中であるか否かを水素充填制御ＥＣＵ１３に通知しており、水素充填制御ＥＣＵ１３では、燃料電池ＥＣＵ１７からの通知に基づき燃料電池１５が発電中であるか否かを判定する。燃料電池１５が発電中であると判断された場合には（Ｓ１２０：ＹＥＳ）、Ｓ１３０に移行する。一方、燃料電池１５が発電中ではないと判断された場合には（Ｓ１２０：ＮＯ）、Ｓ１４０に移行する。 In S120, it is determined whether or not the fuel cell 15 is generating power. Specifically, the fuel cell ECU 17 notifies the hydrogen filling control ECU 13 whether or not the fuel cell 15 is generating power. The hydrogen filling control ECU 13 determines whether the fuel cell 15 is based on the notification from the fuel cell ECU 17. It is determined whether or not power generation is in progress. When it is determined that the fuel cell 15 is generating power (S120: YES), the process proceeds to S130. On the other hand, when it is determined that the fuel cell 15 is not generating power (S120: NO), the process proceeds to S140.
Ｓ１３０では、燃料電池１５が発電中であると判断されたことから、水素漏れ検出閾値を、燃料電池１５が発電中である場合に水素タンク１１からの燃料ガス漏れの有無を判定するための閾値Ａに設定する。その後、Ｓ１５０に移行する。 In S130, since it is determined that the fuel cell 15 is generating power, the hydrogen leak detection threshold value is set as a threshold value for determining whether or not the fuel gas leaks from the hydrogen tank 11 when the fuel cell 15 is generating power. Set to A. Thereafter, the process proceeds to S150.
Ｓ１４０では、燃料電池１５が発電中ではないと判断されたことから、水素漏れ検出閾値を、燃料電池１５が発電中ではない場合に水素タンク１１からの燃料ガス漏れの有無を判定するための閾値Ｂに設定する。その後、Ｓ１５０に移行する。 In S140, since it is determined that the fuel cell 15 is not generating power, the hydrogen leak detection threshold value is used as a threshold value for determining whether or not the fuel gas leaks from the hydrogen tank 11 when the fuel cell 15 is not generating power. Set to B. Thereafter, the process proceeds to S150.
Ｓ１５０では、Ｓ１１０で算出した燃料ガス減少速度の値が、Ｓ１３０またはＳ１４０で設定した水素漏れ検出閾値よりも大きいか否かを判断する。燃料ガス減少速度の値が水素漏れ検出閾値よりも大きいと判断された場合には（Ｓ１５０：ＹＥＳ）、Ｓ１６０に移行する。一方、燃料ガス減少速度の値が水素漏れ検出閾値以下であると判断された場合には（Ｓ１５０：ＮＯ）、Ｓ１７０に移行する。 In S150, it is determined whether or not the value of the fuel gas decrease rate calculated in S110 is larger than the hydrogen leak detection threshold value set in S130 or S140. When it is determined that the value of the fuel gas decrease rate is larger than the hydrogen leak detection threshold (S150: YES), the process proceeds to S160. On the other hand, when it is determined that the value of the fuel gas decrease rate is equal to or less than the hydrogen leak detection threshold value (S150: NO), the process proceeds to S170.
Ｓ１６０では、燃料ガス減少速度の値が水素漏れ検出閾値よりも大きいと判断されたことから、水素タンク１１で水素漏れが発生していると判断し、その旨を報知する。例えば、水素タンク１１で水素漏れが発生している旨を通報することや、警報を発生させるといった具合である。なお、このような通報や警報については、ユーザ通知機能を有する他のＥＣＵで実行するようにしてもよい。その後、本処理を終了する。 In S160, since it is determined that the value of the fuel gas decrease rate is greater than the hydrogen leak detection threshold value, it is determined that hydrogen leak has occurred in the hydrogen tank 11, and this is notified. For example, a notification that a hydrogen leak has occurred in the hydrogen tank 11 or an alarm is generated. Note that such a report or alarm may be executed by another ECU having a user notification function. Thereafter, this process is terminated.
Ｓ１７０では、燃料ガス減少速度の値が水素漏れ検出閾値以下であると判断されたことから、水素タンク１１で水素漏れが発生していないと判断し、上述のような通報や警報は行わない。なお、水素タンク１１で水素漏れが発生していない旨を報知するようにしてもよい。その後、本処理を終了する。 In S170, since it is determined that the value of the fuel gas decrease rate is equal to or less than the hydrogen leak detection threshold value, it is determined that no hydrogen leak has occurred in the hydrogen tank 11, and the above notification or alarm is not performed. In addition, you may make it alert | report that the hydrogen leak has not generate | occur | produced in the hydrogen tank 11. FIG. Thereafter, this process is terminated.
［３．実施形態の効果］
このように本実施形態の燃料電池車両１によれば、水素タンク１１内の温度および水素タンク１１内の圧力に基づいて水素タンク１１内の水素ガスが減少する速度である「燃料ガス減少速度」を算出し、算出された燃料ガス減少速度の値が水素タンク１１からの水素ガス漏れの有無を判定するための水素漏れ検出閾値よりも大きいか否かを判定し、燃料ガス減少速度の値が水素漏れ検出閾値よりも大きい場合に水素タンク１１で水素ガス漏れが発生していると判定するので、当該燃料電池車両１の水素タンク１１近傍に燃料ガス濃度センサを設けなくても、水素タンク１１からの燃料ガス漏れを検知するができる。
[3. Effects of the embodiment]
As described above, according to the fuel cell vehicle 1 of the present embodiment, the “fuel gas decrease rate”, which is the rate at which the hydrogen gas in the hydrogen tank 11 decreases based on the temperature in the hydrogen tank 11 and the pressure in the hydrogen tank 11. Is calculated, and it is determined whether or not the calculated value of the fuel gas decrease rate is larger than a hydrogen leak detection threshold value for determining whether or not hydrogen gas leaks from the hydrogen tank 11, and the value of the fuel gas decrease rate is If it is greater than the hydrogen leak detection threshold value, it is determined that hydrogen gas leak has occurred in the hydrogen tank 11, so even if no fuel gas concentration sensor is provided near the hydrogen tank 11 of the fuel cell vehicle 1, the hydrogen tank 11. Can detect fuel gas leaks from
１…燃料電池車両、１１…水素タンク、１３…水素充填制御ＥＣＵ、１５…燃料電池、１７…燃料電池ＥＣＵ、１９…温度センサ、２１…圧力センサ、２３…水素供給配管、２３ａ…バルブ、１００…水素ステーション、１０１…水素充填ノズル。 DESCRIPTION OF SYMBOLS 1 ... Fuel cell vehicle, 11 ... Hydrogen tank, 13 ... Hydrogen filling control ECU, 15 ... Fuel cell, 17 ... Fuel cell ECU, 19 ... Temperature sensor, 21 ... Pressure sensor, 23 ... Hydrogen supply piping, 23a ... Valve, 100 ... hydrogen station, 101 ... hydrogen-filled nozzle.
Claims (4)
前記燃料ガスタンク（１１）内の圧力の値を取得するタンク内圧力値取得部（１３）と、
前記タンク内温度値取得部（１３）によって取得された前記燃料ガスタンク（１１）内の温度の値および前記タンク内圧力値取得部（１３）によって取得された前記燃料ガスタンク（１１）内の圧力の値に基づき前記燃料ガスタンク（１１）内の燃料ガスが減少する速度である燃料ガス減少速度を算出する燃料ガス減少速度算出部（１３）と、
前記燃料ガス減少速度算出部（１３）によって算出された燃料ガス減少速度の値が前記燃料ガスタンク（１１）からの燃料ガス漏れの有無を判定するための閾値よりも大きいか否かを判定し、前記燃料ガス減少速度の値が前記閾値よりも大きい場合に前記燃料ガスタンク（１１）で燃料ガス漏れが発生していると判定する燃料ガス漏れ判定部（１３）と、
を特徴とする燃料ガス漏れ検出装置（１３）。 An in-tank temperature value acquisition unit (13) for acquiring a temperature value in the fuel gas tank (11) for storing the fuel gas supplied to the fuel cell (15);
A tank pressure value acquisition unit (13) for acquiring a pressure value in the fuel gas tank (11);
The temperature value in the fuel gas tank (11) acquired by the tank internal temperature value acquisition unit (13) and the pressure in the fuel gas tank (11) acquired by the tank internal pressure value acquisition unit (13). A fuel gas decrease rate calculation unit (13) that calculates a fuel gas decrease rate that is a rate at which the fuel gas in the fuel gas tank (11) decreases based on the value;
Determining whether the value of the fuel gas decrease rate calculated by the fuel gas decrease rate calculating unit (13) is greater than a threshold for determining whether or not there is a fuel gas leak from the fuel gas tank (11); A fuel gas leak determination unit (13) that determines that a fuel gas leak has occurred in the fuel gas tank (11) when the value of the fuel gas decrease rate is greater than the threshold;
A fuel gas leak detection device (13) characterized by the above.
前記閾値には、前記燃料電池（１５）が発電中である場合に前記燃料ガスタンク（１１）からの燃料ガス漏れの有無を判定するための閾値である第一閾値と前記燃料電池（１５）が発電中でない場合に前記燃料ガスタンク（１１）からの燃料ガス漏れの有無を判定するための閾値である第二閾値とがあり、
前記燃料電池（１５）が発電中であるか否かを判定する燃料電池状態判定部（１３）を備え、
前記燃料ガス漏れ判定部（１３）は、前記燃料電池状態判定部（１３）によって前記燃料電池（１５）が発電中であると判定された場合には、前記燃料ガス減少速度の値が前記閾値としての前記第一閾値よりも大きいか否かを判定し、一方、前記燃料電池状態判定部（１３）によって前記燃料電池（１５）が発電中でないと判定された場合には、前記燃料ガス減少速度の値が前記閾値としての前記第二閾値よりも大きいか否かを判定すること
を特徴とする燃料ガス漏れ検出装置（１３）。 In the fuel gas leak detection device (13) according to claim 1,
The threshold value includes a first threshold value that is a threshold value for determining whether or not fuel gas leaks from the fuel gas tank (11) when the fuel cell (15) is generating power, and the fuel cell (15). There is a second threshold that is a threshold for determining whether or not there is a fuel gas leak from the fuel gas tank (11) when power generation is not being performed,
A fuel cell state determination unit (13) for determining whether or not the fuel cell (15) is generating electricity;
When the fuel cell state determination unit (13) determines that the fuel cell (15) is generating power, the fuel gas leakage determination unit (13) sets the value of the fuel gas decrease rate to the threshold value. If the fuel cell state determination unit (13) determines that the fuel cell (15) is not generating power, the fuel gas decrease is determined. It is determined whether the value of speed is larger than said 2nd threshold value as said threshold value. The fuel gas leak detection apparatus (13) characterized by the above-mentioned.
前記燃料ガス漏れ判定部（１３）によって前記燃料ガスタンク（１１）で燃料ガス漏れが発生していると判定された場合にその旨を報知する燃料ガス漏れ報知部（１３）を備えること
を特徴とする燃料ガス漏れ検出装置（１３）。 In the fuel gas leak detection device (13) according to claim 1 or 2,
A fuel gas leak notification section (13) for notifying that when the fuel gas leak determination section (13) determines that a fuel gas leak has occurred in the fuel gas tank (11). A fuel gas leak detection device (13).
前記燃料電池（１５）に供給される燃料ガスを貯蔵する燃料ガスタンク（１１）と、
前記燃料ガスタンク（１１）内の温度の値を検出する温度センサ（１９）と、
前記燃料ガスタンク（１１）内の圧力の値を検出する圧力センサ（２１）と、
請求項１〜請求項３の何れか１項に記載の燃料ガス漏れ検出装置（１３）と、を備え、
前記燃料ガス漏れ検出装置（１３）の前記タンク内温度値取得部（１３）は前記温度センサ（１９）が検出した前記燃料ガスタンク（１１）内の温度の値を取得し、
前記燃料ガス漏れ検出装置（１３）の前記タンク内圧力値取得部（１３）は前記圧力センサ（２１）が検出した前記燃料ガスタンク（１１）内の圧力の値を取得すること
を特徴とする燃料電池車両。 A fuel cell vehicle (1) that travels by supplying oxygen-containing air and fuel gas to a fuel cell (15) and driving an electric motor using electric power generated thereby,
A fuel gas tank (11) for storing fuel gas supplied to the fuel cell (15);
A temperature sensor (19) for detecting a temperature value in the fuel gas tank (11);
A pressure sensor (21) for detecting a pressure value in the fuel gas tank (11);
A fuel gas leak detection device (13) according to any one of claims 1 to 3,
The temperature value acquisition unit (13) in the tank of the fuel gas leak detection device (13) acquires the temperature value in the fuel gas tank (11) detected by the temperature sensor (19),
The fuel pressure detection unit (13) of the fuel gas leak detection device (13) acquires the pressure value in the fuel gas tank (11) detected by the pressure sensor (21). Battery powered vehicle.
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