ClassID:

213491

H01M8/04507 - 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; Humidity; Ambient humidity; Water content of cathode reactants at the inlet or inside the fuel cell

Recent Application in this class:
#1
20260128332
2026-05-07

METHOD AND SYSTEM FOR CONTROLLING WATER BALANCE IN METAL-AIR ELECTROCHEMICAL CELLS

#2
20260066317
2026-03-05

METHOD FOR ESTIMATING PARTIAL PRESSURES AND RELATIVE HUMIDITY OF GASES IN FUEL CELL

#3
20260024789
2026-01-22

APPARATUS AND METHOD FOR DETERMINING AIR DISTRIBUTION PERFORMANCE OF A FUEL CELL SYSTEM

#4
20250385345
2025-12-18

METHOD, APPARATUS AND SYSTEM FOR CAPTURING CARBON USING FUEL CELL

#5
20250385286
2025-12-18

POST HUMIDIFIER FUEL CELL STACK HUMIDIFICATION SYSTEM

#6
20250372677
2025-12-04

Fuel Cell Vehicle and Method of Controlling Same

#7
20250309307
2025-10-02

REGENERATIVE FUEL CELL SYSTEM AND METHOD OF OPERATING THE SAME

#8
20250233173
2025-07-17

CATHODE RECIRCULATION LOOP FOR FUEL CELL

#9
20250132362
2025-04-24

METHOD FOR DRYING A FUEL CELL, AND FUEL CELL SYSTEM

#10
20240339699
2024-10-10

METHOD, APPARATUS AND SYSTEM FOR CAPTURING CARBON USING FUEL CELL

#11
20240170769
2024-05-23

Method, apparatus and system for capturing carbon using fuel cell

#12
20240055624
2024-02-15

FUEL CELL SYSTEM HAVING IMPROVED HUMIDIFICATION

#13
20240047718
2024-02-08

METHOD FOR ESTABLISHING THE DEGRADATION OF A HUMIDIFIER

#14
20230420708
2023-12-28

VESSEL FOR A FUEL CELL, A FUEL CELL SYSTEM, AND A METHOD FOR MAINTAINING A NON-EXPLOSIVE ATMOSPHERE IN A VESSEL FOR A FUEL CELL

#15
20230387432
2023-11-30

METHOD FOR ASCERTAINING THE RELATIVE HUMIDITY AT A CATHODE INLET OF A FUEL CELL STACK OF A FUEL CELL SYSTEM

#16
20230335764
2023-10-19

METHOD FOR OPERATING A FUEL CELL DEVICE, THE FUEL CELL DEVICE, AND A MOTOR VEHICLE OUTFITTED WITH A FUEL CELL DEVICE

#17
20230290970
2023-09-14

FUEL CELL SYSTEM

#18
20230282849
2023-09-07

FUEL CELL SYSTEM

#19
20230268524
2023-08-24

HUMIDIFIER FOR FUEL CELL

#20
20230027958
2023-01-26

Fuel cell system, and operating method of fuel cell system

#21
20220255096
2022-08-11

DETERMINATION DEVICE AND METHOD FOR CALCULATING A MOISTURE VALUE IN A FUEL CELL SYSTEM

#22
20220140369
2022-05-05

Fuel Cell System

#23
20220102744
2022-03-31

Fuel cell system

#24
20210273246
2021-09-02

Method for humidifying a reactant, and fuel cell system for carrying out the method

#25
20210242478
2021-08-05

Cathode inlet humidity sensing with oxygen sensor

#26
20210226236
2021-07-22

Fuel cell system, and method of estimating humidity in exhaust gas therefrom

#27
20200403249
2020-12-24

Locally engineered PEM cells components with optimized operation for improved durability

#28
20200067109
2020-02-27

Systems and methods for fuel-cell stack flow control with simultaneous load following

#29
20190312290
2019-10-10

Humidifying and cooling apparatus for fuel cell

#30
20190207226
2019-07-04

Method of manufacturing electrolyte membrane for fuel cells and method of manufacturing membrane-electrode assembly including the same

#31
20190173107
2019-06-06

Fuel cell system and control method for fuel cell system

#32
20190137571
2019-05-09

Fuel cell stack prediction utilizing IHOS

#33
20190074532
2019-03-07

Method for operating a fuel cell and fuel cell system

#34
20180301724
2018-10-18

Fuel cell system and control method therefor

#35
20180294491
2018-10-11

Fuel cell vehicle

#36
20180205100
2018-07-19

Fuel cell system

#37
20180196108
2018-07-12

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

#38
20180175421
2018-06-21

Fuel cell system for preventing flooding of a fuel cell stack

#39
20180175420
2018-06-21

Heat exchange device for cooling water of fuel cell and fuel cell system comprising the same

#40
20180118032
2018-05-03

Motor drive control method and system, and method of controlling drive of air compressor in fuel cell system using the same

#41
20170263964
2017-09-14

Rechargeable battery assembly for a vehicle

#42
20170237096
2017-08-17

Control of an electrochemical device with integrated diagnostics, prognostics and lifetime management

#43
20170170499
2017-06-15

System and method for fuel cell cathode gas humidification

#44
20170077534
2017-03-16

Fuel cell regulation using loss recovery systems

#45
20170077533
2017-03-16

CONTROL METHOD AND SYSTEM OF FUEL CELL SYSTEM

#46
20160141671
2016-05-19

Water drainage device for fuel cell, fuel cell system, moving body and control method of fuel cell system

#47
20160141656
2016-05-19

Fuel cell system and control method therefor

#48
20160036075
2016-02-04

Device for adjusting hollow fiber membrane density for humidification device of fuel cell

#49
20160006060
2016-01-07

Method of controlling operation of fuel cell system

#50
20150340716
2015-11-26

Fuel cell system and control method for same

#51
20150255806
2015-09-10

Current collector for a fuel cell

#52
20150099200
2015-04-09

Freeze preparation for a fuel cell system

#53
20140272630
2014-09-18

Cathode humidification unit adapting degradation factor

#54
20140186726
2014-07-03

Method to diagnose fuel cell humidification problems

#55
20140120436
2014-05-01

Fuel cell humidification management method and system

#56
20130323540
2013-12-05

Fuel cell system with water production control, and vehicle equipped with the same

#57
20130316259
2013-11-28

Fuel cell system having a toggle switch

#58
20130260270
2013-10-03

Power generation via combined fuel thermolysis and hydrolysis

#59
20130157161
2013-06-20

Fuel cell system and control method for fuel cell system

#60
20130157158
2013-06-20

Fuel cell system

#61
20130078542
2013-03-28

Fuel cell system

#62
20130035898
2013-02-07

Utilization of HFR-based cathode inlet RH model in comparison to sensor feedback to determine failed water vapor transfer unit and utilize for a diagnostic code and message

#63
20120237843
2012-09-20

Electrochemical reactor, such as a fuel cell or an electrolyser, provided with a device for measuring a parameter of a gas specific to the operation of said reactor

#64
20120196201
2012-08-02

Method for the early detection of liquid water formation in a fuel cell

#65
20120021313
2012-01-26

FUEL CELL SYSTEM AND METHOD FOR OPERATING THE SAME

#66
20110274993
2011-11-10

Fuel cell system

#67
20110274992
2011-11-10

Water content estimation apparatus for fuel cell and fuel cell system

#68
20110269035
2011-11-03

FUEL CELL SYSTEM AND OPERATING METHOD THEREOF

#69
20110250519
2011-10-13

Fuel cell system

#70
20110244343
2011-10-06

Fuel cell system including water injection device and return passage bypassing compressor

#71
20110217611
2011-09-08

Fuel cell system

#72
20110200896
2011-08-18

Fuel cell system and operating method of a fuel cell

#73
20110165484
2011-07-07

Fuel cell system with mechanical check valve

#74
20110091780
2011-04-21

In-situ fuel cell stack reconditioning

#75
20110045367
2011-02-24

Fuel Cell Supply System, Fuel Cell System and Method of Operating the Same

#76
20110045365
2011-02-24

Method for removing residual water from fuel cell

#77
20110033764
2011-02-10

Fuel cell system with wetness sensor

#78
20100304234
2010-12-02

Method for controlling amount of air supplied to fuel cell

#79
20100255873
2010-10-07

Fuel cell with proton conducting membrane and with improved water and fuel management

#80
20100221620
2010-09-02

FUEL CELL SYSTEM AND OPERATION METHOD THEREOF

#81
20100190076
2010-07-29

TWO STAGE, HFR-FREE FREEZE PREPARATION SHUTDOWN STRATEGY

#82
20100151340
2010-06-17

FUEL CELL IN-PLANE STATE ESTIMATING SYSTEM AND FUEL CELL IN-PLANE STATE ESTIMATING METHOD

#83
20100141262
2010-06-10

Performance degradation analyzer and method of the same

#84
20100104908
2010-04-29

Fuel cell system and operating method thereof

#85
20100086812
2010-04-08

Supply system and warning device for a fuel cell stack and method for controlling the supply system

#86
20100055508
2010-03-04

FUEL CELL SYSTEMS WITH WATER RECOVERY FROM FUEL CELL EFFLUENT

#87
20100040913
2010-02-18

Apparatus and method for determining deterioration of a fuel cell and method for preventing deterioration of the same

#88
20100028722
2010-02-04

Fuel cell system with ultrasonic detector

#89
20090291334
2009-11-26

System and method of controlling fluid to a fluid consuming battery

#90
20090263695
2009-10-22

APPARATUS FOR GENERATING HYDROGEN AND FUEL CELL POWER GENERATION SYSTEM HAVING THE SAME

#91
20090208789
2009-08-20

System and method for purging water from a fuel cell stack

#92
20090191432
2009-07-30

Fuel cell system cathode inlet relative humidity control

#93
20090162710
2009-06-25

Fuel cell system

#94
20090155651
2009-06-18

Fuel cell system and generation control device

#95
20090136788
2009-05-28

Humidity sensing device for use in fuel cell systems

#96
20090123788
2009-05-14

Fuel cell system and operating method thereof

#97
20090123787
2009-05-14

Fuel cell power plant and control method thereof

#98
20090035618
2009-02-05

System and method for recirculating unused fuel in fuel cell application

#99
20090029213
2009-01-29

Method for detecting abnormality in fuel cell

#100
20090029210
2009-01-29

Low-Temperature Fuel-Cell Stack and Method of Operating Same

#101
20090011302
2009-01-08

Fuel Cell System

#102
20080311438
2008-12-18

Fuel cell humidity control system and method

#103
20080278183
2008-11-13

FUEL CELL TEST SYSTEM

#104
20080176117
2008-07-24

Fuel Cell System and Fuel Cell System Control Method

#105
20080118783
2008-05-22

Fiber optic based in-situ diagnostics for PEM fuel cells

#106
20080081238
2008-04-03

Water transfer efficiency improvement in a membrane humidifier by reducing dry air inlet temperature

#107
20070287041
2007-12-13

System level adjustments for increasing stack inlet RH

#108
20070184314
2007-08-09

Fuel cell system

#109
20070141414
2007-06-21

Fuel cell having micro sensors

#110
20070141412
2007-06-21

Sensorless relative humidity control in a fuel cell application

#111
20070138309
2007-06-21

Non-linear cathode inlet/outlet humidity control

#112
20070072016
2007-03-29

METHODS AND APPARATUS FOR IMPROVING THE COLD STARTING CAPABILITY OF A FUEL CELL

#113
20070026276
2007-02-01

Fuel cell system and control method of fuel cell system

#114
20060263653
2006-11-23

Management via dynamic water holdup estimator in a fuel cell

#115
20060263652
2006-11-23

Fuel cell system relative humidity control

#116
20060263651
2006-11-23

Relative humidity profile control strategy for high current density stack operation

#117
20060216560
2006-09-28

Fuel cell systems

#118
20060169024
2006-08-03

Gas sensor and fuel cell system and automobile employing the same

#119
20060134480
2006-06-22

A SENSOR ASSEMBLY FOR MEASURING HUMIDITY, PRESSURE AND TEMPERATURE

#120
20060093881
2006-05-04

Fuel-cell evaluation equipment

#121
20050260480
2005-11-24

Cathode humidification of a PEM fuel cell through exhaust gas recirculation into a positive displacement compressor

#122
20050214605
2005-09-29

Fuel cell system and method of discontinuing same

#123
20050077364
2005-04-14

Temperature/humidity control system for a fuel cell stack and a method thereof

#124
20050075816
2005-04-07

System and method for controlling a fuel cell testing device