A fuel cell system includes an ECU that sets the fuel cell stack to a state of idling stop by lowering both a revolution speed of an air pump and a discharge current value of the fuel cell stack to less than during idling power generation within a range larger than 0, in response to a predetermined idling stop initiation condition having been satisfied during idling power generation. The ECU decreases the discharge current value further as the lowest cell voltage value CV_low of the fuel cell stack decreases so that the lowest cell voltage value CV_low does not fall below a cancellation threshold B, with an event of the lowest cell voltage CV_low of the fuel cell stack having fallen below the cancellation threshold B as a cancellation condition of idling stop.

Fuel cell system and control method thereof

A method includes: determining whether or not an elapsed time since stopping of power generation of a fuel cell until an operation start instruction to start a fuel cell system is detected is shorter than a specified time, if the operation start instruction to start the fuel cell system is detected after the power generation of the fuel cell is stopped; setting, as a first amount, an amount of replacement of a fuel gas on an anode side, if it is determined that the elapsed time is shorter than the specified time; and setting, as a second amount, an amount of replacement of the fuel gas on the anode side, if it is determined that the elapsed time is longer than the specified time. The first amount is larger than the second amount.

Method for controlling fuel cell system

Provided is an anode for a lithium secondary battery composed of a multi-layered structure including an electrode current collector, a first anode active material layer including a first anode active material formed on the electrode current collector, and a second anode active material layer including a second anode active material having relatively lower press density and relatively larger average particle diameter than the first anode active material. Since an anode according to an embodiment of the present invention may include a multi-layered active material layer including two kinds of anode active materials having different press densities and average particle diameters on an electrode current collector, porosity of the surface of the electrode may be improved even after a press process to improve ion mobility into the electrode. Thus, charge characteristics and cycle life of a lithium secondary battery may be improved.

Anode for lithium secondary battery and lithium secondary battery including the same

PROBLEM TO BE SOLVED: To provide a fuel battery system which improves stability of voltage when an output of a fuel battery changes.SOLUTION: A fuel battery system 101 equipped with a fuel battery 10 which generates electric energy by making hydrogen gas supplied from a hydrogen gas tank 11 react with oxygen in the air, includes a compressor 12 for sending air to the fuel battery 10, and a fuel battery ECU13 that outputs, by controlling, the electric energy generated by the fuel battery 10. The fuel battery ECU13 sets, for the fuel battery 10 which is in a state where supply of hydrogen gas from the hydrogen gas tank 11 is stopped, when starting outputting of electric energy, a target output voltage for the electric energy that is outputted from the fuel battery 10, and for the fuel battery 10, the output voltage is kept at the target output voltage, and the electric energy that corresponds to the flow rate of the air sent to the fuel battery 10 is outputted.

Fuel battery system

A fuel cell system (1) includes a replacing unit for replacing a gas remaining in the anode of the fuel cell (10) with the anode gas supplied anew by the anode gas supply unit when starting up the fuel cell. The amount of the anode gas is set to be lower, if the operation condition determining unit (51) determines that the last operation was performed in a low-temperature and short-time operation mode. The operation condition determining unit sets the amount of the anode gas so that the gas remaining in the anode can be replaced with the anode gas with an entire anode capacity if the anode was been scavenged while no electro-chemical reaction was progressing in the fuel cell (10). The present invention can set the amount of anode gas appropriately when starting up the fuel cell (10).

Fuel cell system and method for controlling the same

PROBLEM TO BE SOLVED: To enable a fuel cell to generate heat easily and securely when starting at a low temperature, and to carry out continuous power generation superbly. SOLUTION: A fuel cell system 10 is equipped with a fuel cell stack 12 to generate power by an electrochemical reaction of a fuel gas and an oxidizer gas, a high pressure energy storage unit 18 capable of charging and discharging generated energy of the fuel cell stack 12 and of directly coupling the energy storage unit with the fuel cell stack 12, a load group 20 to which electric power is supplied by the generated power of the fuel cell stack 12 or the discharge electric power of the high pressure energy storage unit 18, and an auxiliary control part 70 capable of reducing a remaining storage amount of the high pressure energy storage unit 18 to a prescribed value by either one load out of the load group 20 before starting power generation of the fuel cell stack 12. COPYRIGHT: (C)2009,JPO&INPIT

Fuel cell system and its starting method

PROBLEM TO BE SOLVED: To provide a fuel cell system that can improve fuel economy. SOLUTION: The fuel cell system 1 is equipped with a fuel cell 10; an air pump 21, an air supply passage, a hydrogen supply passage, a hydrogen tank, a hydrogen exhausting passage, a hydrogen circulation passage, an air exhausting passage, a purge valve 441, and a control device 30. The control device 30 is equipped with a dilution decision part 31 for deciding whether dilution of hydrogen gas in the hydrogen supply passage, the hydrogen exhausting passage, and the hydrogen circulation passage is completed, when a stop signal of the fuel cell 10 is inputted; an air amount increasing part 33 increasing air flow rate in the air exhausting passage with the air pump, when the dilution decision part 31 decides that dilution is not completed; a power generation amount calculating part 34 for calculating the power generation amount of the fuel cell 10, corresponding to the air flow rate increased with the air amount increasing part 33; and a fuel cell drive part 35 for generating electric power of the fuel cell 10 so that the power reaches the power generation amount, calculated by the power generation amount calculating part 34. COPYRIGHT: (C)2009,JPO&INPIT

Fuel cell system and control method therefor

PROBLEM TO BE SOLVED: To perform processing after stop and processing related to communication injecting in an appropriate manner.SOLUTION: A method for controlling a fuel cell vehicle comprises: charging upon stop processing and EGR stop processing (t10-t15) to open a main stop valve, supply hydrogen to a stack, and continue power generation and discharge by the stack after an ignition switch is turned off; communication injecting (t15-t16) to inject hydrogen supplied by an external hydrogen station into a hydrogen tank while transmitting a data signal indicating the state of the hydrogen tank to the hydrogen station in response to the issuance of a hydrogen injecting start request to the hydrogen tank (t11); and waiting steps (t11-t15) to wait to start communication injecting until charging upon stop processing and EGR stop processing in execution finish if the injecting start request is issued during execution of the charging upon stop processing and the EGR stop processing.

Method for controlling fuel cell vehicle

PROBLEM TO BE SOLVED: To provide a method of operating a fuel battery system that can prevent a fuel battery from falling into a dry-up state even when a turbo pump is adopted.SOLUTION: In a method of operating a fuel battery system 1 having a fuel battery 2, a turbo pump 10, an oxidant gas supply flow passage 42, an oxidant off-gas discharge flow passage 46, a branch flow passage 48, a branch valve 52, and a control device 6 for controlling generated power of the fuel battery 2, the control device 6 controls the turbo pump 10 and the branch valve 52 to adjust the flow amount of oxidant gas supplied to the fuel battery 2 in an extremely low power generation mode which requires extremely low generated power not more than predetermined generated power corresponding to the lowest flow amount of the oxidant gas which can be supplied by the turbo pump 10.

Method of operating fuel battery system

PROBLEM TO BE SOLVED: To provide a fuel cell system capable of reducing a time for a start-up process of a fuel cell and saving energy consumption. SOLUTION: The fuel cell system 1, in a start-up process of a fuel cell 10, supplies anode gas and opens a purge valve 351 and carries out a first gas substitution process for substituting gas in an anode gas passage to judge whether the fuel cell 10 satisfies a given power generation starting condition. At this stage, in case the power generation starting condition is not satisfied even if the first gas substitution process is carried out, a dilution assisting valve 241 is opened and dilution gas is introduced to a dilution unit 50, and after promoting dilution of gas in the dilution unit, and as the anode gas is supplied, a drain valve 361 is opened and a second gas substitution process in which gas in the anode gas passage is substituted is carried out. COPYRIGHT: (C)2010,JPO&INPIT

裕嗣松本

Papers

Fuel cell system and its starting method

Fuel cell system and control method therefor

Method for controlling fuel cell vehicle

Method of operating fuel battery system

Fuel cell system and its controlling method

裕嗣 松本

Papers

Fuel cell system and its starting method

Fuel cell system and control method therefor

Method for controlling fuel cell vehicle

Method of operating fuel battery system

Fuel cell system and its controlling method

裕嗣松本