JP2011014322A5

JP2011014322A5 -

Info

Publication number: JP2011014322A5
Application number: JP2009156289A
Authority: JP
Filing date: 2009-06-30
Publication date: 2012-03-22
Anticipated expiration: 2029-06-30

Description

（６）上記の特徴（１）〜（５）のいずれかを有する発明において、前記反応ガス供給装置の前記反応ガスの供給開始と、前記燃料電池から流れ出す発電電流の波形が、前記発電出力をゼロに調整していて前記発電電流がゼロになっている状態からの上昇開始と、が同時であるので、反応ガスの供給開始時において発電電位が急激に高電位になることが抑制され燃料電池の劣化を防止することができる。
また、この発明に係る燃料電池システムは、反応ガスにより発電する燃料電池と、前記燃料電池の発電出力により駆動される負荷と、アイドル停止状態から復帰するとき、前記燃料電池の目標発電出力を決定する目標発電出力決定部と、前記燃料電池の前記発電出力を調整する発電出力調整部と、を備える燃料電池システムにおいて、前記燃料電池システムが前記アイドル停止状態から復帰する際、前記発電出力調整部が前記燃料電池の前記発電出力を、前記目標発電出力決定部で決定された前記目標発電出力に一致させる過程を有し、前記過程で、前記燃料電池から流れ出す発電電流の波形が、前記目標発電出力に対応する目標電流を超えて上昇した後、前記目標電流に向かって下降しているとともに、前記燃料電池の発電電圧の波形が、前記燃料電池の劣化促進領域に入る前まで上昇し、前記劣化促進領域内では前記劣化促進領域に入る前までの前記上昇より緩やかに上昇していることを特徴とする。 (6) In the invention having any one of the above characteristics (1) to (5), the start of the reaction gas supply of the reaction gas supply device and the waveform of the power generation current flowing out of the fuel cell may Since the start of the rise from the state where the generated current is adjusted to zero and the generated current is zero is simultaneous, it is possible to suppress a sudden increase in the generated potential at the start of the supply of the reaction gas. Can be prevented.
In addition, the fuel cell system according to the present invention determines a fuel cell that generates power using a reaction gas, a load that is driven by the power generation output of the fuel cell, and a target power generation output of the fuel cell when returning from an idle stop state. In a fuel cell system comprising: a target power generation output determination unit that performs a power generation output adjustment unit that adjusts the power generation output of the fuel cell; and when the fuel cell system returns from the idle stop state, the power generation output adjustment unit Has a process of matching the power generation output of the fuel cell with the target power generation output determined by the target power generation output determination unit, and the waveform of the power generation current flowing out of the fuel cell in the process is the target power generation After rising beyond the target current corresponding to the output, and falling toward the target current, the waveform of the power generation voltage of the fuel cell, Serial increased to before entering the degradation promoting region of the fuel cell, wherein the accelerated deterioration region, characterized in that it rises slowly than the rise up before entering the accelerated degradation region.

Claims

A reaction gas supply device for supplying the reaction gas;
A fuel cell that generates electricity using the reaction gas;
A load driven by the power generation output of the fuel cell;
A target power generation output determining unit that determines a target power generation output of the fuel cell when starting the supply of the reaction gas from the reaction gas supply device to the fuel cell;
A power generation output adjusting unit for adjusting the power generation output of the fuel cell;
In a fuel cell system comprising:
From the state in which the reaction gas supply device stops supplying the reaction gas and the power generation output adjustment unit adjusts the power generation output from the fuel cell to the load to zero, the reaction gas supply device is Starting the supply of the reaction gas, the power generation output adjustment unit has the process of matching the power generation output of the fuel cell with the target power generation output determined by the target power generation output determination unit,
In the process,
The waveform of the generated current flowing out of the fuel cell is
After the power generation output is adjusted to zero and the power generation current is zero from the target current corresponding to the target power output from the state where the power generation current is zero, the power generation output is decreasing toward the target current,
The waveform of the power generation voltage of the fuel cell is
The fuel cell system, wherein the fuel cell system rises before entering the deterioration promotion region of the fuel cell, and rises more slowly in the deterioration promotion region than the increase before entering the deterioration promotion region.

The fuel cell system according to claim 1, wherein
The reaction gas supply device supplies the reaction gas according to the target power generation output of the fuel cell.

The fuel cell system according to claim 1 or 2,
The fuel cell system is characterized in that the rate of voltage increase of the generated voltage gradually decreases when rising at a speed slower than the rising speed before entering the deterioration promotion area in the deterioration promotion area.

The fuel cell system according to any one of claims 1 to 3,
During the process of matching the target power generation output determined by the target power generation output determination unit, when the load required power required by the load increases,
The target power generation output determination unit increases the target power generation output by following an increase in the required load power. The fuel cell system.

In the fuel cell system according to any one of claims 1 to 4,
A power storage device is provided in parallel with the fuel cell,
The power generation output adjustment unit is a converter disposed on the power storage device side,
The fuel cell system, wherein the converter adjusts the waveform of the generated current by adjusting the generated voltage using current / voltage characteristics of the fuel cell.

The fuel cell system according to any one of claims 1 to 5,
The reaction gas supply device starts supplying the reaction gas;
The fuel cell system characterized in that the waveform of the power generation current flowing out of the fuel cell simultaneously starts rising from a state where the power generation output is adjusted to zero and the power generation current is zero.

A fuel cell that generates electricity using reactive gas; and
A load driven by the power generation output of the fuel cell;
A target power output determining unit that determines a target power output of the fuel cell when returning from an idle stop state;
A power generation output adjusting unit for adjusting the power generation output of the fuel cell;
In a fuel cell system comprising:
When the fuel cell system returns from the idle stop state, the power generation output adjustment unit has a process of matching the power generation output of the fuel cell with the target power generation output determined by the target power generation output determination unit. ,
In the process,
The waveform of the power generation current flowing out of the fuel cell rises above the target current corresponding to the target power generation output, and then decreases toward the target current.
The waveform of the power generation voltage of the fuel cell rises before entering the deterioration promotion region of the fuel cell, and rises more slowly in the deterioration promotion region than the increase before entering the deterioration promotion region.
A fuel cell system.