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Title:
FUEL CELL SYSTEM
Document Type and Number:
Japanese Patent JP2011216429
Kind Code:
A
Abstract:

To improve impedance measurement performance of a fuel cell in a fuel cell system which has a polyphase voltage convertor.

The fuel cell system includes the fuel cell, the polyphase voltage converter having N phases (N is an integer of two or more) and connected with the fuel cell, a control signal generation part for generating control signals to control each phase of the polyphase voltage converter by superimposing a control waveform for measuring impedance on voltage indicating output target voltage of the polyphase voltage converter and outputting the control signals of N phases to the polyphase voltage converter in sequence at a predetermined phase difference, and an impedance calculation part for measuring current and voltage of the fuel cell at a cycle corresponding to N-pieces of designated sampling frequencies having the same phase difference with the predetermined phase difference and calculating impedance of the fuel cell by using the measured current and voltage.


Inventors:
HASEGAWA TAKAHIKO
KITAMURA NOBUYUKI
Application Number:
JP2010085697A
Publication Date:
October 27, 2011
Filing Date:
April 02, 2010
Export Citation:
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Assignee:
TOYOTA MOTOR CORP
International Classes:
H01M8/04; B60L11/18; G01R27/02; G01R27/08; H01M8/00; H01M8/10
Domestic Patent References:
JP2008098134A2008-04-24
JPS6151576A1986-03-14
JP2008312320A2008-12-25
JP2009158162A2009-07-16
Attorney, Agent or Firm:
Meisei International Patent Office