ClassID:

213441

H01M8/04134 - CPC Classification

Classification description:

Fuel cells; Manufacture thereof; Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids; Arrangements for control of reactant parameters, e.g. pressure or concentration of gaseous reactants with simultaneous supply or evacuation of electrolyte; Humidifying or dehumidifying; Humidifying by coolants

Recent Application in this class:
#1
20260100386
2026-04-09

FOUR-FLUID BIPOLAR PLATE FOR FUEL CELL AND METHODS OF OPERATION

#2
20260011756
2026-01-08

Fuel Cell System

#3
20250353601
2025-11-20

FUEL CELL COOLING AND WASTE HEAT RECOVERY SYSTEM FOR GENERATING POWER FOR AIRCRAFT SYSTEMS

#4
20250174684
2025-05-29

Membrane Electrode Assembly Humidifying Method and Computer Readable Storage Medium

#5
20240006632
2024-01-04

FOUR-FLUID BIPOLAR PLATE FOR FUEL CELL

#6
20230387433
2023-11-30

Controlling PEMFC stack flooding

#7
20230317981
2023-10-05

Fuel Cell Cooling

#8
20230099737
2023-03-30

AIR COOLER AND FUEL CELL SYSTEM

#9
20230040108
2023-02-09

FOUR-FLUID BIPOLAR PLATE FOR FUEL CELL

#10
20230011881
2023-01-12

COOLING APPARATUS OF FUEL CELL VEHICLE

#11
20230010823
2023-01-12

Water-based, combined cooling and humidification system for a fuel cell system

#12
20220399553
2022-12-15

Four-fluid bipolar plate for fuel cell

#13
20220376281
2022-11-24

FUEL CELL MEMBRANE HUMIDIFIER AND FUEL CELL SYSTEM HAVING SAME

#14
20220320553
2022-10-06

Method of determining degradation of fuel cell stack, and fuel cell vehicle equipped with the fuel cell stack

#15
20220302478
2022-09-22

Fuel cell system

#16
20220223883
2022-07-14

Fuel cell system

#17
20220209260
2022-06-30

Fuel cell vehicle having small space occupied by humidifier and cooler

#18
20210384532
2021-12-09

HUMIDIFIER AND MOTOR VEHICLE

#19
20210226231
2021-07-22

Devices and Methods for Controlling A Fluid Module

#20
20210143453
2021-05-13

Fuel cell system

#21
20200411890
2020-12-31

Air cleaner

#22
20200321641
2020-10-08

Degradation-conscious control for PEM fuel cells

#23
20190267645
2019-08-29

Fuel cell system and control method of fuel cell system

#24
20190229347
2019-07-25

Bipolar plate having a variable width of the reaction gas channels in the inlet region of the active region, fuel-cell stack and fuel-cell system having bipolar plates of this type, as well as a vehicle

#25
20190198901
2019-06-27

Fuel cell system and method of providing surfactant fuel bubbles

#26
20190181463
2019-06-13

Evaporative cooling type fuel cell system and cooling control method for the same

#27
20190165395
2019-05-30

Equation based state estimator for cooling system controller

#28
20190165394
2019-05-30

Equation based cooling system control strategy/method

#29
20190165387
2019-05-30

Partial derivative based feedback controls for pid

#30
20180323456
2018-11-08

Electrochemical cell and method of operation

#31
20180301721
2018-10-18

Fuel cell system

#32
20180166711
2018-06-14

Fuel cell cooling system

#33
20180159158
2018-06-07

Fuel cell system

#34
20170365865
2017-12-21

Cooling system and method for use with a fuel cell

#35
20170346108
2017-11-30

Cooling water direct injection type fuel cell

#36
20170263955
2017-09-14

Evaporative cooling type fuel cell system and cooling control method for the same

#37
20170207470
2017-07-20

Electrochemical cell and method of operation

#38
20170179505
2017-06-22

Humidifier with an integrated water separator for a fuel cell system, fuel cell system including a humidifier, and vehicle including same

#39
20170125827
2017-05-04

Cathode supply for a fuel cell

#40
20150349363
2015-12-03

Gas purge control for coolant in a fuel cell

#41
20150221962
2015-08-06

Fuel cell coolant flowfield configuration

#42
20150155573
2015-06-04

FUEL CELL COOLING APPARATUS AND FUEL CELL COOLING METHOD USING THE SAME

#43
20150050575
2015-02-19

Fuel cell fluid distribution

#44
20140051011
2014-02-20

Fuel cell component including a vapor permeable layer

#45
20140017581
2014-01-16

COMPACT FUEL CELL

#46
20130280640
2013-10-24

Compact fuel cell system with fuel cell in fluid tank

#47
20130236804
2013-09-12

Cooling system and method for use with a fuel cell

#48
20120321972
2012-12-20

Water management in fuel cells

#49
20120315556
2012-12-13

Fuel cell reactant inlet humidification

#50
20120251909
2012-10-04

Pressure-based liquid level detection and control for a fuel cell stack assembly

#51
20120040260
2012-02-16

FUEL CELL SYSTEM AND WATER DRAINING METHOD FOR FUEL CELL SYSTEM

#52
20110236781
2011-09-29

FUEL CELL COOLING

#53
20110097639
2011-04-28

Fuel cell coolant bubble control

#54
20110086288
2011-04-14

FUEL CELL STRUCTURE WITH POROUS METAL PLATE

#55
20100304261
2010-12-02

Fuel cell design with an integrated heat exchanger and gas humidification unit

#56
20100255390
2010-10-07

Fuel cell system operation method

#57
20100203401
2010-08-12

HUMIDIFICATION SYSTEM USING INJECTOR FOR FUEL CELL STACK

#58
20100068568
2010-03-18

GAS PURGE CONTROL FOR COOLANT IN A FUEL CELL

#59
20100068565
2010-03-18

VARIABLE FUEL PRESSURE CONTROL FOR A FUEL CELL

#60
20100047643
2010-02-25

FUEL CELL SYSTEM

#61
20100047629
2010-02-25

PEM fuel cell system with a porous hydrophobic gas venting member with gas flow blockage prevention

#62
20090325037
2009-12-31

Fuel cell fluid distribution plates

#63
20090208798
2009-08-20

Humidification system using injector for fuel cell stack

#64
20090208795
2009-08-20

Three-way diverter assembly for a fuel cell system

#65
20090136807
2009-05-28

MEA COMPONENT, AND POLYMER ELECTROLYTE FUEL CELL

#66
20090061262
2009-03-05

Retaining water in a fuel cell stack for cooling and humidification during frozen startup

#67
20090053564
2009-02-26

METHOD AND SYSTEM FOR OPERATING FUEL CELL STACKS TO REDUCE NON-STEADY STATE CONDITIONS DURING LOAD TRANSIENTS

#68
20080248336
2008-10-09

Water management in fuel cells

#69
20080083456
2008-04-10

Method and a device for supplying at least one process gas

#70
20080075993
2008-03-27

Internal proton exchange membrane humidification and cooling with automotive coolant

#71
20080026273
2008-01-31

Fuel cell system and control method therefor

#72
20080014475
2008-01-17

Anode humidification

#73
20070281187
2007-12-06

Membrane fuel cell countercurrent-fed with non-humidified air

#74
20070257384
2007-11-08

External gas humidifier for fuel cell

#75
20070218325
2007-09-20

Method of cleaning fuel cell

#76
20070207353
2007-09-06

Cascaded fuel cell stack operation with anode gas recirculation

#77
20070196710
2007-08-23

Membrane electrochemical generator

#78
20070172716
2007-07-26

Modified fuel cells with internal humidification and/or temperature control systems

#79
20070172708
2007-07-26

Fuel cell system failure diagnosis method, failure diagnosis device using same, and fuel cell system

#80
20070154747
2007-07-05

Fuel cell coolant bubble control

#81
20070154745
2007-07-05

Purging a fuel cell system

#82
20070154744
2007-07-05

Fuel cell coolant bubble control

#83
20070134526
2007-06-14

Fuel cell system and water recovery method thereof

#84
20060280976
2006-12-14

Fuel cell system

#85
20060240308
2006-10-26

Fuel cell design with an integrated heat exchanger and gas humidification unit

#86
20060154117
2006-07-13

Electrochemical generator and method for its utilisation

#87
20060147773
2006-07-06

Heat and humidity exchanger

#88
20060144450
2006-07-06

Valve device for use with fuel cells

#89
20060093883
2006-05-04

Polymer electrolyte membrane fuel cell stack

#90
20060068240
2006-03-30

Fuel cell system

#91
20060024541
2006-02-02

Solid-oxide fuel cell system having an upstream reformate combustor

#92
20050221133
2005-10-06

Fuel cell-use humidifier

#93
20050164049
2005-07-28

Storing water in substrates for frozen, boot-strap start of fuel cells

#94
20050115150
2005-06-02

Hydrogen gas station, fuel cell system, and hydrogen gas rate accounting device

#95
20050112430
2005-05-26

Method and apparatus for humidification control of an energy recovery device in a fuel cell power plant

#96
20050106434
2005-05-19

Fuel cell system with improved humidification system

#97
20050074640
2005-04-07

Fuel cell system and operation method thereof

#98
20050003252
2005-01-06

Passive water management system for a fuel cell power plant