JP7196797B2 - 燃料電池車両 - Google Patents
燃料電池車両 Download PDFInfo
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- JP7196797B2 JP7196797B2 JP2019145194A JP2019145194A JP7196797B2 JP 7196797 B2 JP7196797 B2 JP 7196797B2 JP 2019145194 A JP2019145194 A JP 2019145194A JP 2019145194 A JP2019145194 A JP 2019145194A JP 7196797 B2 JP7196797 B2 JP 7196797B2
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- H01M8/04029—Heat exchange using liquids
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- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H1/2215—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from electric heaters
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- B60L58/32—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load
- B60L58/34—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling fuel cells for controlling the temperature of fuel cells, e.g. by controlling the electric load by heating
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- 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
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- H01M8/04358—Temperature; Ambient temperature of the coolant
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- H01M8/04537—Electric variables
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- H01M8/04619—Power, energy, capacity or load of fuel cell stacks
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- B60K1/00—Arrangement or mounting of electrical propulsion units
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- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/60—Navigation input
- B60L2240/66—Ambient conditions
- B60L2240/662—Temperature
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Description
この形態の燃料電池車両によれば、低温環境下における燃料電池車両の始動に先立って、外部電源を用いてヒータおよび第1ポンプを駆動して冷媒を加熱することにより、燃料電池を加熱することができる。そのため、低温始動時に燃料電池を速やかに昇温させることができる。
(2)上記形態の燃料電池車両において、前記第1ポンプおよび前記ヒータは、前記冷媒流路に設けられた着脱部を介して前記冷媒流路に備えられていることとしてもよい。この形態の燃料電池車両によれば、燃料電池車両において、ヒータおよび第1ポンプを備える寒冷地仕様を設定し、寒冷地仕様を含む複数のグレードの車両を用意することが容易になる。
(3)上記形態の燃料電池車両は、さらに、前記冷媒を冷却するラジエータを備え、前記冷媒流路は、前記燃料電池と前記ラジエータとの間で前記冷媒を循環させるメイン流路と、前記メイン流路に両端が接続されて、前記ラジエータを迂回するように前記冷媒を流すと共に、前記ヒータおよび前記第1ポンプが設けられたバイパス流路と、を備え、前記着脱部は、前記メイン流路から前記バイパス流路が分岐する分岐部に設けられることとしてもよい。この形態の燃料電池車両によれば、ヒータおよび第1ポンプをバイパス流路に設けるため、ヒータを用いて冷媒を加熱する際には、ラジエータを迂回させて冷媒を流すことができ、ヒータを用いて冷媒を加熱する効率を高めることができる。また、燃料電池の発電時に第2ポンプを駆動するときには、バイパス流路における冷媒の流通を抑えてメイン流路に冷媒を流すことで、第1ポンプが流路抵抗となることを抑え、第2ポンプの消費電力の増加を抑えることができる。
(4)上記形態の燃料電池車両において、前記着脱部は、前記メイン流路と前記バイパス流路との間で前記冷媒の流れを切り替える切替弁に備えられていることとしてもよい。この形態の燃料電池車両によれば、ヒータおよび第1ポンプを、バイパス流路ごと、メイン流路から容易に着脱することができる。
(5)上記形態の燃料電池車両は、さらに、充放電可能な蓄電装置と、前記蓄電装置と前記燃料電池とのうちの少なくとも一方から電力供給されて、前記冷媒流路に前記冷媒を流通させる第2ポンプと、を備え、前記外部電源は、前記第2ポンプの作動電圧よりも出力電圧が低いこととしてもよい。この形態の燃料電池車両によれば、外部電源と接続部とを接続するための配線における電圧を抑え、外部電源の消費電力を抑えつつ、第1ポンプを用いて冷媒流路に冷媒を流すことができる。
(6)上記形態の燃料電池車両において、前記外部電源は、商用電源であることとしてもよい。この形態の燃料電池車両によれば、ヒータおよび第1ポンプの電源の確保が容易になる。
本発明は、燃料電池車両以外の種々の形態で実現することも可能である。例えば、燃料電池車両における暖機運転の補助方法、燃料電池車両の制御方法等の形態で実現することができる。
図1は、本発明の一実施形態としての燃料電池車両100の概略構成を模式的に示す説明図である。燃料電池車両100は、駆動用電源である燃料電池システム15と、車体110に設けられた車両側接続部120と、蓄電装置660と、を備える。燃料電池システム15は、燃料電池車両100に搭載された図示しない駆動モータで用いる電力を発生するための装置である。燃料電池システム15は、燃料電池600と、燃料ガス供給系200と、酸化ガス供給系300と、排ガス系400と、冷却系500と、制御部650と、を備える。後述する燃料ガス供給系200、酸化ガス供給系300、および排ガス系400の構成は一例であり、燃料電池600に対して燃料ガスおよび酸化ガスを供給可能であればよい。
本実施形態のヒータ540および第1ポンプ520は、低温環境下で燃料電池車両100を始動する際に、燃料電池600の温度を予め高めて、その後の暖機運転を補助し、燃料電池600を速やかに昇温させるために設けられている。なお、燃料電池600の暖機運転とは、燃料電池600に供給する酸素量を抑える等の方法により、通常運転時に比べて低効率で発電を行なわせて、燃料電池600で生じるエネルギ中の熱エネルギの割合を高めた運転状態を指す。
(C1)上記実施形態では、燃料電池車両100の車両側接続部120と外部電源700とを接続することにより、ヒータ540および第1ポンプ520の駆動が開始され、上記接続を解除することにより、ヒータ540および第1ポンプ520が停止されることとしたが、異なる構成としてもよい。例えば、制御部650が、車両側接続部120と外部電源700との接続状態、燃料電池600の温度、外気温、燃料電池システム15が停止されてからの経過時間等を取得して、予め定めた条件を満たすときに、ヒータ540および第1ポンプ520を駆動することとしてもよい。すなわち、燃料電池システム15の停止後、始動時の暖機運転の進行に支障を来たす程度に燃料電池600が降温したと判断するときに、ヒータ540および第1ポンプ520を駆動することとしてもよい。例えば、車両側接続部120と外部電源700とが接続された状態で、燃料電池システム15が停止されてからの経過時間が、予め定めた基準時間を超えたときに、ヒータ540および第1ポンプ520の駆動を開始してもよい。あるいは、車両側接続部120と外部電源700とが接続された状態で、システム停止中の外気温や燃料電池600の温度が、予め定めた基準温度以下となったときに、ヒータ540および第1ポンプ520の駆動を開始してもよい。このような構成としても、実施形態と同様の効果が得られる。
Claims (4)
- 駆動用電源としての燃料電池を搭載した燃料電池車両であって、
前記燃料電池に接続された冷媒流路と、
前記冷媒流路に冷媒を流通させる第1ポンプと、
前記冷媒を加熱するヒータと、
前記ヒータおよび前記第1ポンプと電気的に接続され、前記燃料電池車両の外部に設けられた外部電源と電気的に接続するための接続部と、
前記冷媒を冷却するラジエータと、
を備え、
前記ヒータおよび前記第1ポンプは、前記接続部を介して接続された前記外部電源からの電力供給を受けて駆動され、
前記冷媒流路は、
前記燃料電池と前記ラジエータとの間で前記冷媒を循環させるメイン流路と、
前記メイン流路に両端が接続されて、前記ラジエータを迂回するように前記冷媒を流すと共に、前記ヒータおよび前記第1ポンプが設けられたバイパス流路と、
を備え、
前記第1ポンプおよび前記ヒータは、前記冷媒流路に設けられた着脱部を介して前記冷媒流路に備えられ、
前記着脱部は、前記メイン流路から前記バイパス流路が分岐する分岐部に設けられる
燃料電池車両。 - 請求項1に記載の燃料電池車両であって、
前記着脱部は、前記メイン流路と前記バイパス流路との間で前記冷媒の流れを切り替える切替弁に備えられている
燃料電池車両。 - 請求項1又は請求項2に記載の燃料電池車両であって、さらに、
充放電可能な蓄電装置と、
前記蓄電装置と前記燃料電池とのうちの少なくとも一方から電力供給されて、前記冷媒流路に前記冷媒を流通させる第2ポンプと、
を備え、
前記外部電源は、前記第2ポンプの作動電圧よりも出力電圧が低い
燃料電池車両。 - 請求項1から3のいずれか一項に記載の燃料電池車両であって、
前記外部電源は、商用電源である
燃料電池車両。
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