ClassID:

213502

H01M8/04589 - 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; Current of fuel cell stacks

Recent Application in this class:
#1
20260149017
2026-05-28

METHOD OF DIAGNOSING LEAKAGE OF STACK COOLANT AND DEVICE THEREFOR

#2
20260142206
2026-05-21

INPUT ASSEMBLY FOR A POWER TRANSFER UNIT

#3
20260142205
2026-05-21

DIAGNOSTIC METHOD FOR DIAGNOSING A STATE OF AN ELECTROCHEMICAL CELL OF AN ELECTROCHEMICAL ENERGY CONVERTER

#4
20260128337
2026-05-07

FUEL CELL SYSTEM

#5
20260112668
2026-04-23

Device and Method for Controlling Operation of Fuel Cell Stack

#6
20260109267
2026-04-23

MANAGING DEGRADATION IN HOT MODE OPERATION OF A FUEL CELL VEHICLE

#7
20260100389
2026-04-09

FUEL CELL VEHICLE AND METHOD OF CONTROLLING THE SAME

#8
20260088318
2026-03-26

METHOD FOR OPERATING A FUEL CELL SYSTEM, AND A CONTROL DEVICE

#9
20260024792
2026-01-22

FUEL CELL SYSTEM AND A METHOD OF CONTROLLING THE SAME

#10
20260018633
2026-01-15

METHOD OF THERMAL MANAGEMENT OF FUEL CELL SYSTEM USING MEA TEMPERATURE ESTIMATION

#11
20250316737
2025-10-09

AN ELECTRONICALLY COMMUTATED FUEL CELL SYSTEM

#12
20250300202
2025-09-25

STARTUP CONTROL METHOD OF FUEL CELL SYSTEM

#13
20250253367
2025-08-07

Methods, Devices, Controllers, and Media for Determining Fuel Cell Anode Water Condition

#14
20250183336
2025-06-05

METHOD FOR MONITORING A BATTERY POWER PLANT

#15
20250083572
2025-03-13

POWER SOURCE ASSEMBLY FOR AN AERONAUTICAL VEHICLE

#16
20250015324
2025-01-09

FUEL CELL SYSTEM

#17
20240417084
2024-12-19

ELECTRICAL SYSTEM

#18
20240388118
2024-11-21

PRE-CHARGE SWITCH DEVICE AND FUEL CELL DEVICE FOR A DAMPED VOLTAGE AND CURRENT ADJUSTMENT, COMPRISING A BATTERY WHICH IS CONNECTED IN PARALLEL, AND MOTOR VEHICLE

#19
20240347748
2024-10-17

DEVICE FOR DIAGNOSING VALVE FAILURE OF FUEL CELL SYSTEM

#20
20240347746
2024-10-17

DILUTION CIRCUITRY FOR FUEL CELL VEHICLES WITH COMBINED FUEL CELL EXHAUST SYSTEMS

#21
20240332575
2024-10-03

Method and System for Dynamically Modifying Fuel Cell Stack Current to Manage Fuel Cell Membrane Hydration

#22
20240322208
2024-09-26

FUEL CELL SYSTEM

#23
20240313245
2024-09-19

FUEL CELL SYSTEM

#24
20240297318
2024-09-05

CELL DEGRADATION LEVEL CALCULATION DEVICE FOR ELECTROCHEMICAL CELL STACK, CELL DEGRADATION LEVEL CALCULATION SYSTEM, CELL DEGRADATION LEVEL CALCULATION METHOD, AND STORAGE MEDIUM STORING CELL DEGRADATION LEVEL CALCULATION PROGRAM

#25
20240194908
2024-06-13

METHOD FOR PURGING A REACTANT CHAMBER

#26
20240162463
2024-05-16

DEVICE FOR DETERMINING WATER CONTENT STATE OF FUEL CELL STACK AND FUEL CELL VEHICLE

#27
20240105975
2024-03-28

SYSTEM AND METHOD FOR FUEL CELL

#28
20240036092
2024-02-01

Measuring the impedance in grounding systems

#29
20240025554
2024-01-25

AIRCRAFT EQUIPPED WITH FUEL CELL SYSTEM AND THRUST CONTROL METHOD

#30
20240021856
2024-01-18

SYSTEMS AND METHODS OF USING AN ENERGY STORAGE DEVICE TO ASSIST AN EJECTOR

#31
20230420711
2023-12-28

FUEL CELL SYSTEM

#32
20230411656
2023-12-21

Fuel cell system and method for controlling purge thereof

#33
20230387434
2023-11-30

FUEL CELL SYSTEM

#34
20230387432
2023-11-30

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

#35
20230317991
2023-10-05

Locating Degraded Cells in a Polymer Electrolyte Membrane Fuel Cell Stack

#36
20230317990
2023-10-05

POWER SUPPLY SYSTEM, CONTROL METHOD, AND PROGRAM

#37
20230317981
2023-10-05

Fuel Cell Cooling

#38
20230282855
2023-09-07

POWER NET SYSTEM FOR FUEL CELLS AND METHOD FOR CONTROLLING THE SAME

#39
20230282853
2023-09-07

METHOD AND SYSTEM FOR CONTROLLING AIR COMPRESSOR OF FUEL CELL SYSTEM

#40
20230261228
2023-08-17

Method and system employing fuel cell stack power model in controlling fuel cell system

#41
20230216074
2023-07-06

System and method for determining performance of fuel cell stack

#42
20230207846
2023-06-29

System and method for indirectly monitoring an isolation resistance of one or more fuel cells

#43
20230197989
2023-06-22

Recovery control system of fuel cell and method thereof

#44
20230155150
2023-05-18

OPERATING METHOD FOR A SOLID OXIDE CELL SYSTEM

#45
20230147324
2023-05-11

DEVICE AND METHOD FOR CONTROLLING FUEL CELL SYSTEM

#46
20230094726
2023-03-30

SYSTEM INCLUDING FUEL CELL ASSEMBLY VOLTAGE MONITOR

#47
20230054074
2023-02-23

Method of controlling fuel cell

#48
20230039588
2023-02-09

ELECTRIC POWER GENERATION SYSTEM BASED ON PRESSURIZED FUEL CELL POWER SYSTEM WITH AIR COOLING AND RECIRCULATION AND METHOD FOR ELECTRIC POWER GENERATION BY THE SYSTEM

#49
20230006236
2023-01-05

Fuel cell staging for molten carbonate fuel cells

#50
20220416269
2022-12-29

Systems and methods of using an energy storage device to assist an ejector

#51
20220399555
2022-12-15

Control device for a fuel cells stack

#52
20220352533
2022-11-03

System and method for operating fuel cell

#53
20220320551
2022-10-06

Method of controlling fuel battery system

#54
20220285709
2022-09-08

Redox flow battery arrays and methods for state of charge balancing

#55
20220285703
2022-09-08

Fuel cell system

#56
20220246962
2022-08-04

Electrochemical impedance spectroscopy (“EIS”) analyzer and method of using thereof

#57
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

#58
20220209262
2022-06-30

Control system and method of fuel cell stacks

#59
20220190368
2022-06-16

Fuel cell system and method for controlling fuel cell system

#60
20220173417
2022-06-02

System and method for measuring impedance of a fuel cell stack

#61
20220173416
2022-06-02

Fuel cell system and apparatus and method for diagnosing same

#62
20220158205
2022-05-19

System and method for controlling fuel cell

#63
20220149400
2022-05-12

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

#64
20220131167
2022-04-28

Device for diagnosing valve failure of fuel cell system

#65
20220077480
2022-03-10

Method and system for operating an electrochemical fuel cell stack with improved performance recovery

#66
20210376361
2021-12-02

METHOD AND SYSTEM FOR POWER GENERATION WITH FUEL CELL

#67
20210359316
2021-11-18

Fuel cell system

#68
20210296668
2021-09-23

Method for diagnosing degradation of fuel cell stack, method for multi-point analysis of fuel cell, and method for estimating performance of fuel cell membrane electrode

#69
20210296666
2021-09-23

Control device, power supply device, work machine, control method, and computer-readable recording medium

#70
20210249673
2021-08-12

FUEL CELL UNIT

#71
20210202968
2021-07-01

System including fuel cell assembly voltage monitor

#72
20210175528
2021-06-10

Method for determining an operating state of an electrochemical system

#73
20210135258
2021-05-06

Apparatus and method for measuring voltage and average power of fuel cell

#74
20210135257
2021-05-06

Control method for fuel cell

#75
20200361623
2020-11-19

Fuel cell power pack for drone and state information monitoring method thereof

#76
20200321637
2020-10-08

Fuel cell system

#77
20200303752
2020-09-24

Operating control method and control system of fuel cell stack

#78
20200295393
2020-09-17

Fuel cell stack

#79
20200256756
2020-08-13

METHOD AND SYSTEM FOR DETECTING A LEAK IN A FLUID SYSTEM

#80
20200251759
2020-08-06

System and method for controlling coolant temperature for fuel cell

#81
20200251758
2020-08-06

Fuel cell vehicle

#82
20200243878
2020-07-30

Fuel cell system

#83
20200194813
2020-06-18

Electrochemical impedance spectroscopy (“EIS”) analyzer and method of using thereof

#84
20200185734
2020-06-11

VOLTAGE CONTROL METHOD FOR FUEL CELL STACK AND FUEL CELL SYSTEM FOR VEHICLE

#85
20200176799
2020-06-04

Fuel cell staging for molten carbonate fuel cells

#86
20200168939
2020-05-28

Fuel cell monitoring device and method of determining state of fuel cell

#87
20200168934
2020-05-28

Fuel cell system and operating method thereof

#88
20200168928
2020-05-28

Method for operating a fuel cell system and a fuel cell vehicle

#89
20200153008
2020-05-14

Fuel cell state determination method and fuel cell state determination apparatus

#90
20200144638
2020-05-07

Fuel cell system

#91
20200136159
2020-04-30

Method to control maximum current for a fuel cell

#92
20190393524
2019-12-26

Fuel cell system for modulating offset of hydrogen pressure sensor and method for modulating offset of hydrogen pressure sensor

#93
20190386323
2019-12-19

Method for detecting and lessening fuel starvation in fuel cell systems

#94
20190334184
2019-10-31

Method and control unit for conditioning a fuel cell stack

#95
20190312291
2019-10-10

Apparatus and method for controlling operation of fuel cell system

#96
20190288312
2019-09-19

Method and system for estimating available output of fuel cell

#97
20190267642
2019-08-29

Plant control system, plant control method, and non-transitory computer-readable medium

#98
20190229355
2019-07-25

Method and apparatus for controlling water flooding failure in fuel cell dual-stack system

#99
20190207235
2019-07-04

Method of controlling hydrogen partial pressure for fuel cell system

#100
20190190045
2019-06-20

Method and system for diagnosing failure of temperature sensor for fuel cell

#101
20190190040
2019-06-20

System and method for MEA conditioning in a fuel cell

#102
20190181476
2019-06-13

Fuel cell thermal management system and control method of the same

#103
20190181465
2019-06-13

Fuel cell control method and control system

#104
20190173108
2019-06-06

Power supply device, apparatus, and control method

#105
20190088961
2019-03-21

Fuel cell system and method of controlling fuel cell system

#106
20190074531
2019-03-07

Fuel cell device

#107
20190071952
2019-03-07

FUEL CELL APPARATUS AND METHOD FOR DOWNHOLE POWER SYSTEMS

#108
20190067715
2019-02-28

Method and system for controlling hydrogen purging of fuel cell

#109
20190049522
2019-02-14

Method for determining critical operating states in a fuel cell stack

#110
20190049521
2019-02-14

Method for determining critical operating states in a fuel cell stack

#111
20190020046
2019-01-17

Fuel cell system

#112
20180375134
2018-12-27

Circuit arrangement for impressing an electrical signal into an electrochemical energy supply device

#113
20180375133
2018-12-27

Direct current (DC) load levelers

#114
20180375130
2018-12-27

APPARATUS AND METHOD FOR PREDICTING LIFE SPAN OF FUEL CELL, AND VEHICLE SYSTEM HAVING THE SAME

#115
20180375129
2018-12-27

Fuel cell system with anode degradation reduction control

#116
20180375124
2018-12-27

Apparatus and method for discharging condensate of a fuel cell stack

#117
20180366750
2018-12-20

METHOD FOR CONTROLLING A FUEL CELL

#118
20180323455
2018-11-08

Regulation of a fuel cell assembly

#119
20180301724
2018-10-18

Fuel cell system and control method therefor

#120
20180294494
2018-10-11

Fuel cell system

#121
20180287174
2018-10-04

Apparatus and method for diagnosing fuel cell and vehicle system

#122
20180269503
2018-09-20

Fuel cell system controller and associated method

#123
20180257490
2018-09-13

Fuel cell unit

#124
20180212262
2018-07-26

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

#125
20180198140
2018-07-12

Method for monitoring the operating state of fuel cells

#126
20180183081
2018-06-28

Fuel cell system and method of controlling the same

#127
20180166719
2018-06-14

System and method for controlling fuel cell vehicle

#128
20180166717
2018-06-14

Method and apparatus for estimating hydrogen crossover loss of fuel cell system

#129
20180151899
2018-05-31

Flow batteries having adjustable circulation rate capabilities and methods associated therewith

#130
20180138530
2018-05-17

Circuit and method for cell voltage sensing in fuel cell stack

#131
20180131021
2018-05-10

Thermoelectric cooperation control method for SOFC system based on fractional order sliding mode variable structure

#132
20180126865
2018-05-10

Technique of diagnosing fuel cell stack

#133
20170346118
2017-11-30

Fuel cell system and operating method thereof

#134
20170346117
2017-11-30

Fuel cell system and method of shutting down the same

#135
20170331125
2017-11-16

Constant voltage control method and system of fuel cell vehicle

#136
20170324104
2017-11-09

State determination device and method for fuel cell

#137
20170324101
2017-11-09

PROACTIVE ANODE FLOODING REMEDIATION

#138
20170310142
2017-10-26

Fuel cell system

#139
20170305252
2017-10-26

Fuel cell system for motor vehicle and control method of same

#140
20170301935
2017-10-19

APPARATUS AND METHOD FOR CONTROLLING FUEL CELL STACK

#141
20170297451
2017-10-19

Method and system for controlling air flow supplied to vehicle fuel cell

#142
20170294667
2017-10-12

Method of determining hydrogen deficiency and device for determining hydrogen deficiency

#143
20170248657
2017-08-31

Power generation characteristic estimation device for fuel cell

#144
20170237090
2017-08-17

Integrated fuel cell control system and operating method thereof

#145
20170179511
2017-06-22

Method of controlling purge of fuel cell system for vehicle

#146
20170179503
2017-06-22

Fuel cell system, operating method thereof and fuel cell power plant

#147
20170170500
2017-06-15

Method and system for diagnosing state of fuel cell stack

#148
20170125830
2017-05-04

Fuel cell stack diagnostic system and diagnostic method thereof

#149
20170104230
2017-04-13

Laminated battery, separator and connection method of internal resistance measuring device

#150
20170092972
2017-03-30

Relative humidity estimators for fuel cell stack ports

#151
20170077535
2017-03-16

Electrochemical impedance spectroscopy (“EIS”) analyzer and method of using thereof

#152
20170059663
2017-03-02

Diagnostic device

#153
20170033378
2017-02-02

Method and system for controlling start of fuel cell

#154
20170025689
2017-01-26

Fuel cell system

#155
20160380290
2016-12-29

Fuel cell system

#156
20160380289
2016-12-29

Fuel cell system including water content estimation

#157
20160351929
2016-12-01

Operation control method of fuel cell system

#158
20160351928
2016-12-01

Fuel cell system and control method for fuel cell system

#159
20160351927
2016-12-01

Fuel source, fuel cell system and associated method

#160
20160347200
2016-12-01

Fuel Cell Vehicle

#161
20160344050
2016-11-24

Fuel cell system

#162
20160344048
2016-11-24

Fuel cell system and controlling method thereof

#163
20160336607
2016-11-17

Apparatus and method for controlling purge valve of fuel cell vehicle

#164
20160254554
2016-09-01

Fuel cell system and method for controlling fuel cell system

#165
20160248107
2016-08-25

Fuel cell system

#166
20160240872
2016-08-18

Fuel cell system

#167
20160218382
2016-07-28

Non-invasive measurement method for controlling the functioning of a membrane fuel cell

#168
20160204455
2016-07-14

Simplification of the electrical system of fuel cells by means of depletion of the cathode supply

#169
20160201436
2016-07-14

Fuel cell apparatus and method for downhole power systems

#170
20160169979
2016-06-16

Apparatus and method for measuring impedance for fuel cell diagnosis

#171
20160164126
2016-06-09

Device and method for monitoring dryness of fuel cell stack

#172
20160144738
2016-05-26

System and method for power distribution of fuel cell hybrid vehicle

#173
20160133972
2016-05-12

Fuel cell system

#174
20160133970
2016-05-12

Fuel cell system and control method of fuel cell system

#175
20160133969
2016-05-12

Fuel cell system and power generation monitoring method

#176
20160132035
2016-05-12

Fuel cell system and method of controlling fuel cell

#177
20160126574
2016-05-05

Fuel cell system and maximum power calculation method

#178
20160126573
2016-05-05

Method for diagnosing current sensor of fuel cell system

#179
20160091570
2016-03-31

System for measuring a stack cell voltage of a fuel cell and method thereof

#180
20160072138
2016-03-10

FUEL CELL SYSTEM

#181
20160064754
2016-03-03

Fuel cell system and control method for fuel cell system

#182
20160049672
2016-02-18

Fuel cell system and method of controlling fuel cell system

#183
20160049671
2016-02-18

Fuel cell system and control method therefor

#184
20160036077
2016-02-04

Apparatus and method for managing fuel cell vehicle system

#185
20160006060
2016-01-07

Method of controlling operation of fuel cell system

#186
20160006059
2016-01-07

DRIVING CONTROL METHOD AND SYSTEM OF FUEL CELL SYSTEM

#187
20150362560
2015-12-17

System and method for diagnosing state of fuel cell stack and controlling fuel cell system

#188
20150333351
2015-11-19

Control apparatus, fuel cell unit and control method

#189
20150255814
2015-09-10

Fuel cell system

#190
20150255807
2015-09-10

Methods and systems for fuel cell stack sintering and conditioning

#191
20150244011
2015-08-27

Electrochemical impedance spectroscopy (EIS) analyzer and method of using thereof

#192
20150224894
2015-08-13

METHOD FOR DIAGNOSING FUEL CELL STACK

#193
20150188167
2015-07-02

Apparatus for controlling fuel cell heating value

#194
20150180365
2015-06-25

Method for generating injection current for fuel cell stack and apparatus for performing the same

#195
20150180348
2015-06-25

Method for generating injection current for fuel cell stack and apparatus for performing the same

#196
20150180069
2015-06-25

Apparatus and method for controlling hydrogen purging

#197
20150155577
2015-06-04

Fuel cell stack and control method thereof

#198
20150153418
2015-06-04

Method for determining critical operating states in a fuel cell stack

#199
20150140464
2015-05-21

Derivation of control parameters of fuel cell systems for flexible fuel operation

#200
20150134277
2015-05-14

Method for checking the gas tightness of a fuel cell system

#201
20150111122
2015-04-23

Fuel cell system

#202
20150099204
2015-04-09

Regulation of a fuel cell assembly

#203
20150084638
2015-03-26

Current measurement device

#204
20150064589
2015-03-05

Fuel cell system and its control method

#205
20150064588
2015-03-05

Apparatus and method for controlling fuel cell system

#206
20140335432
2014-11-13

SYSTEMS AND METHODS FOR ESTIMATING FUEL CELL STATES

#207
20140335430
2014-11-13

Fuel cell system and operating method therefor

#208
20140333316
2014-11-13

Fuel cell system with minimum cell voltage estimation

#209
20140329157
2014-11-06

Method of operating fuel cell with high power and high power fuel cell system

#210
20140248548
2014-09-04

Output control apparatus for fuel cell

#211
20140247053
2014-09-04

Method of utilizing power transistor of fuel cell stack diagnostic system

#212
20140220465
2014-08-07

Method for the detection of fuel cell system short circuits

#213
20140205923
2014-07-24

Power generation characteristic estimation device for fuel cell

#214
20140186734
2014-07-03

DIAGNOSTIC AND HEAT MANAGEMENT SYSTEM FOR FUEL CELL STACK

#215
20140184264
2014-07-03

Diagnostic system and method for fuel cell stack

#216
20140167775
2014-06-19

Systems and methods for measuring high frequency resistance in a fuel cell system

#217
20140162157
2014-06-12

Apparatus for diagnosing fault of fuel cell stack

#218
20140162155
2014-06-12

Derivation of control parameters of fuel cell systems for flexible fuel operation

#219
20140154603
2014-06-05

Fuel cell apparatus and fuel cell system

#220
20140081497
2014-03-20

System and method for controlling fuel cell system

#221
20140080025
2014-03-20

Fuel cell system

#222
20140080022
2014-03-20

Apparatus and method for managing fuel cell vehicle system

#223
20140011108
2014-01-09

Fuel cell power plant control

#224
20130288147
2013-10-31

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

#225
20130216927
2013-08-22

Methods and systems for fuel cell stack sintering and conditioning

#226
20130171535
2013-07-04

SYSTEM FOR MEASURING PERFORMANCE OF SOLID OXIDE FUEL CELL

#227
20130171533
2013-07-04

Method and arrangement to control operating conditions in fuel cell device

#228
20130169253
2013-07-04

Fuel cell system

#229
20130082531
2013-04-04

Energy adjustor for fuel cell group

#230
20130078542
2013-03-28

Fuel cell system

#231
20130071767
2013-03-21

Fuel cell system

#232
20130065091
2013-03-14

Fuel cell system, and control method for fuel cell system

#233
20130059220
2013-03-07

FUEL CELL SYSTEM AND DRIVING METHOD THEREOF

#234
20130059215
2013-03-07

Methods and systems for controlling power output of a fuel cell

#235
20130057292
2013-03-07

Fuel cell system

#236
20130052931
2013-02-28

Device and method for enhanced air circulation

#237
20130052545
2013-02-28

Fuel cell system with calculation of liquid water volume

#238
20130045431
2013-02-21

System and method for the recovery of fuel cell catalyst performance

#239
20130040219
2013-02-14

Fuel cell system

#240
20130022886
2013-01-24

System and method for detecting a fuel cell anode gas composition

#241
20130004872
2013-01-03

METHOD FOR EARLY DETECTION OF MEMBRANE FAILURES OF FUEL CELL STACKS AND FUEL CELL SYSTEM COMPONENT DEFECTS

#242
20130004870
2013-01-03

Fuel cell system and method for controlling electric current of same

#243
20130004869
2013-01-03

FUEL CELL SYSTEM

#244
20120328911
2012-12-27

System and method for optimizing efficiency and power output from a vanadium redox battery energy storage system

#245
20120321972
2012-12-20

Water management in fuel cells

#246
20120315560
2012-12-13

FUEL CELL SYSTEM, FUEL CELL CONTROL METHOD, AND FUEL CELL DETERMINATION METHOD

#247
20120308905
2012-12-06

Fuel cell system and control method of same

#248
20120295173
2012-11-22

Fuel cell power generation system with partition wall for main body package

#249
20120282536
2012-11-08

Device and method for controlling fuel cell system having oxygen concentration transient reduction

#250
20120274332
2012-11-01

Algorithm for in-situ quantification of PEMFC membrane health over its life

#251
20120270130
2012-10-25

METHOD FOR SUPPLYING POWER FROM A FUEL CELL TAKING SULPHUR OXIDE POLLUTION INTO ACCOUNT, AND POWER SUPPLY DEVICE

#252
20120270128
2012-10-25

Fuel cell power generation system

#253
20120270127
2012-10-25

Method for detecting the permeability state of the ion exchanger polymer membrane of a fuel cell

#254
20120270124
2012-10-25

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Fuel cell system controller

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Method of stopping operation of fuel cell system

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Fuel cell system, control method for the fuel cell system, and vehicle equipped with the fuel cell system

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Utilization-based fuel cell monitoring and control

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