ClassID:

213509

H01M8/04641 - CPC Classification

Classification description:

Fuel cells; Manufacture thereof; Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids; 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; Electric variables; Other electric variables, e.g. resistance or impedance of the individual fuel cell

Recent Application in this class:
#1
20260106183
2026-04-16

FUEL CELL

#2
20260027300
2026-01-29

MEDICAL DEVICE AND MEDICAL SYSTEM USING SAID MEDICAL DEVICE

#3
20250309297
2025-10-02

FUEL CELL SYSTEM, VEHICLE, AND METHOD OF MEASURING IMPEDANCE

#4
20250192205
2025-06-12

PROCESSING METHOD AND PROCESSING APPARATUS RELATED TO ELECTROCHEMICAL CELL, AND NON-TRANSITORY STORAGE MEDIUM

#5
20250105321
2025-03-27

Fuel Cell with On-Board Impedance Measurement

#6
20250070203
2025-02-27

FUEL CELL SYSTEM, VEHICLE, AND METHOD OF MEASURING IMPEDANCE

#7
20250046839
2025-02-06

APPARATUS AND METHOD FOR DETECTING OR CONTROLLING CARBON BUILDUP IN A DIRECT CARBON FUEL CELL

#8
20230084323
2023-03-16

Method for controlling fuel cell device

#9
20220416264
2022-12-29

METHOD OF MONITORING AND REPLACING FUEL CELL STACKS WITHIN A FUEL CELL STACK ASSEMBLY

#10
20220399556
2022-12-15

FUEL CELL SYSTEM

#11
20220320531
2022-10-06

FUEL CELL

#12
20220293982
2022-09-15

FUEL CELL SYSTEM

#13
20220293981
2022-09-15

Fuel cell system

#14
20220244319
2022-08-04

Method and apparatus for simultaneous detection of a plurality of parameters of a plurality of membrane electrode assemblies of fuel cell stack

#15
20220166040
2022-05-26

Fuel cell vehicle and method of stopping the same

#16
20220149400
2022-05-12

Device and method for online impedance spectrum measurement of vehicle-mounted hydrogen fuel cell

#17
20220102743
2022-03-31

Electrochemical cell system

#18
20210359317
2021-11-18

Methods and systems for estimating parameters of a cell at various charge-discharge profiles

#19
20210257633
2021-08-19

Power supply device having a fuel cell device and a battery, fuel cell vehicle, and method for starting a power supply device

#20
20210202975
2021-07-01

Fuel cell device and systems enabling cell-level repair

#21
20210066736
2021-03-04

FUEL CELL SYSTEM AND METHOD FOR CONTROLLING THE SAME

#22
20210033645
2021-02-04

Device for detecting current leakage and current leakage detection system including the same

#23
20200328442
2020-10-15

Fuel cell system

#24
20200176796
2020-06-04

Methods and systems for controlling water imbalance in an electrochemical cell

#25
20200168930
2020-05-28

Method of measuring impedance of fuel cell stack in vehicle

#26
20200153005
2020-05-14

Fuel cell device and method for operating a fuel cell device

#27
20200006798
2020-01-02

Fuel cell

#28
20190393526
2019-12-26

CLOSED LOOP CONTROL FOR FUEL CELL WATER MANAGEMENT

#29
20190319283
2019-10-17

Fuel cell system and method of estimating content of metal ions

#30
20190237784
2019-08-01

Anode bleed control in a fuel cell stack

#31
20190229358
2019-07-25

Method and system for diagnosing state of fuel cell

#32
20190190048
2019-06-20

Systems and methods for acquisition, parameterization, and validation of fuel cell polarization data

#33
20190131638
2019-05-02

Method for diagnosing water-containing state of fuel cell stack

#34
20190049522
2019-02-14

Method for determining critical operating states in a fuel cell stack

#35
20190049521
2019-02-14

Method for determining critical operating states in a fuel cell stack

#36
20190020045
2019-01-17

REDOX FLOW BATTERY AND METHOD OF MEASURING STATE OF CHARGE THEREOF

#37
20180316032
2018-11-01

Methods and systems for operating a redox flow battery system

#38
20180301729
2018-10-18

Method for controlling the operation of a microbial fuel cell arrangement and microbial fuel cell arrangement

#39
20180277863
2018-09-27

Fuel cell system and remaining water purging control method

#40
20180212262
2018-07-26

Apparatus and method for determining the condition of an electricity-producing cell

#41
20180210019
2018-07-26

Multichannel fuel cell test station

#42
20180196108
2018-07-12

Method and device for observing a state of a fuel-cell electrochemical system

#43
20180083298
2018-03-22

Output performance diagnosis apparatus for fuel cell, output performance diagnosis system for fuel cell, output performance diagnosis method for fuel cell, and non-transitory computer readable medium storing output performance diagnosis program for fuel cell

#44
20180053952
2018-02-22

State detection device and method for fuel cell

#45
20180048006
2018-02-15

Fuel cell internal state detection system and state detection method

#46
20170373331
2017-12-28

STATE DETECTION DEVICE AND METHOD FOR FUEL CELL

#47
20170352895
2017-12-07

System for measuring the hygrometry of an ion exchange membrane in a fuel cell

#48
20170324119
2017-11-09

REFERENCE ELECTRODE IMPLEMENTATION WITH REDUCED MEASUREMENT ARTIFACTS

#49
20170324104
2017-11-09

State determination device and method for fuel cell

#50
20170309936
2017-10-26

Accelerated lifetime test device for redox flow battery

#51
20170294667
2017-10-12

Method of determining hydrogen deficiency and device for determining hydrogen deficiency

#52
20170250423
2017-08-31

Method for controlling fuel cell system

#53
20170250416
2017-08-31

FUEL CELL CONTROL METHOD AND FUEL CELL SYSTEM

#54
20170244337
2017-08-24

POWER SUPPLY SYSTEM, APPARATUS, AND CONTROL METHOD

#55
20170244336
2017-08-24

Power supply system, apparatus, and control method combining a first control signal and a second control signal

#56
20170187052
2017-06-29

Hydrogen purging device and method for fuel cell system

#57
20170170502
2017-06-15

Method and system for diagnosing state of fuel cell

#58
20170098837
2017-04-06

Determination of a spatial distribution of an electrical production parameter of an electrochemical cell

#59
20170082696
2017-03-23

Determining of a spatial distribution of the electrical contact resistance of an electrochemical cell

#60
20170059663
2017-03-02

Diagnostic device

#61
20170025693
2017-01-26

Systems and methods for detecting anode contamination in a fuel cell system

#62
20170005350
2017-01-05

SYSTEMS AND METHODS FOR ACQUISITION, PARAMETERIZATION, AND VALIDATION OF FUEL CELL POLARIZATION DATA

#63
20170003239
2017-01-05

Apparatus for measuring micro-cracks in a membrane electrode assembly and method for predicting generation of micro-cracks in the same

#64
20160380289
2016-12-29

Fuel cell system including water content estimation

#65
20160240875
2016-08-18

Anode bleed control in a fuel cell stack

#66
20160190613
2016-06-30

Fuel cell system and method of controlling operation of fuel cell

#67
20160149240
2016-05-26

Apparatus and method for diagnosing fuel cell

#68
20160141690
2016-05-19

Fuel cell system and control method thereof

#69
20160141676
2016-05-19

Fuel cell system and control method of fuel cell system

#70
20160056484
2016-02-25

Fuel cell system and method of operating fuel cell system

#71
20160054391
2016-02-25

METHOD, DEVICE AND SYSTEM FOR MEASURING IMPEDANCE OF FUEL CELL

#72
20150162632
2015-06-11

Method of controlling a fuel cell system using impedance determination

#73
20150153418
2015-06-04

Method for determining critical operating states in a fuel cell stack

#74
20150004506
2015-01-01

Fuel cell system

#75
20140315114
2014-10-23

Method and regulation apparatus for operating a fuel cell or a fuel cell stack

#76
20140295302
2014-10-02

Fuel cell monitoring device

#77
20140220470
2014-08-07

Fuel cell system for calculating fuel cell temperature based on water content and internal impedance thereof, and method for controlling the same

#78
20140162151
2014-06-12

Humidification control method for fuel cell

#79
20140120436
2014-05-01

Fuel cell humidification management method and system

#80
20140093802
2014-04-03

Method of controlling a fuel cell system using impedance determination

#81
20130330646
2013-12-12

Fuel cell system

#82
20130249562
2013-09-26

Internal resistance measurement device and method for stacked battery

#83
20130189595
2013-07-25

Fuel cell system capable of performing gas purge to adjust amount of water therein

#84
20130103224
2013-04-25

Method for sequentially measuring impedance, measurement device, and fuel cell system

#85
20130093456
2013-04-18

Testing device for solid oxide fuel cell

#86
20130024051
2013-01-24

Device and method for regulating the humidity of a fuel cell

#87
20120321976
2012-12-20

Controlling fuel cell

#88
20120288776
2012-11-15

Fuel cell system and control method for fuel cell system

#89
20120276466
2012-11-01

In-vehicle algorithm for fuel cell stack health quantification

#90
20120145564
2012-06-14

Fuel cell evaluator and fuel cell evaluation method

#91
20120038373
2012-02-16

Apparatus for estimating fuel-cell hydrogen concentration and fuel cell system

#92
20120015263
2012-01-19

Method and apparatus for determining humidity states of individual cells in a fuel cell, method and apparatus for controlling humidity states of individual cells in a fuel cell, and a fuel cell system

#93
20110269046
2011-11-03

Fuel cell system

#94
20110221450
2011-09-15

Measurement process for determination of the optimum contact pressure among components of a solid oxide fuel cell stack in the packaging process and its measurement apparatus

#95
20110076581
2011-03-31

Stack operation method aimed at cell reversal prevention

#96
20110027679
2011-02-03

Fuel cell system

#97
20110014547
2011-01-20

Method for storing a fuel cell at freezing temperature

#98
20100264930
2010-10-21

Fuel cell system

#99
20100216043
2010-08-26

Controlling a fuel cell system based on fuel cell impedance characteristic

#100
20100206455
2010-08-19

Method and apparatus for examining ion-conductive electrolyte membrane

#101
20100188108
2010-07-29

Liquid water sensor signal conditioning circuit for use in PEM fuel cells

#102
20100159295
2010-06-24

ON-LINE REPLACEMENT OF DCFC TUBULAR ELEMENTS

#103
20100151341
2010-06-17

Fuel cell system

#104
20100136447
2010-06-03

Fuel cell system

#105
20100098979
2010-04-22

Fuel cell system and moving body using the fuel cell system

#106
20090321265
2009-12-31

Methods for controlling catalytic processes, including the deposition of carbon based particles

#107
20090286109
2009-11-19

Fuel cell system and driving method of fuel cell system

#108
20090263683
2009-10-22

Method and device for improving the service life of a fuel cell at transitions in operation

#109
20090220827
2009-09-03

Monitoring fuel cells using rfid devices

#110
20090197155
2009-08-06

Online low performing cell (LPC) prediction and detection of fuel cell system

#111
20090197125
2009-08-06

Method for maximum net power calculation for fuel cell system based on online polarization curve estimation

#112
20090068506
2009-03-12

DEVICE AND METHOD FOR MONITORING INTERNAL STATE OF FUEL CELL

#113
20080318101
2008-12-25

Membrane electrode assembly containing flexible printed circuit board formed on ion exchange membrane support film

#114
20080197852
2008-08-21

System for monitoring a group of electrochemical cells and device therefor

#115
20080118793
2008-05-22

Fluid flow pulsing for increased stability in PEM fuel cell

#116
20080042654
2008-02-21

Fuel cell diagnostic apparatus and diagnostic method

#117
20060141308
2006-06-29

Apparatus and method for variable conductance temperature control

#118
20060121322
2006-06-08

Systems and methods for fuel cell shutdown

#119
20050260463
2005-11-24

Fluid flow pulsing for increased stability in PEM fuel cell

#120
20050136301
2005-06-23

Monitoring fuel cells using RFID devices

#121
16181965
2020-03-17

Methods and systems for controlling water imbalance in an electrochemical cell