公开(公告)号：US20160056478A1

公开(公告)日：2016-02-25

申请号：US14466244

申请日：2014-08-22

Applicant: GM Global Technology Operations LLC

Inventor： Siguang Xu ,  Joseph N. Lovria ,  Elizabeth Dicocco

IPC: H01M8/02 ,  H01M8/10

CPC classification number: H01M8/0206 ,  H01M8/021 ,  H01M8/0247 ,  H01M8/10 ,  H01M2008/1095 ,  H01M2250/20 ,  Y02P70/56 ,  Y02T90/32

Abstract: A bipolar plate used in a fuel cell and a method of making a bipolar plate. The sheet is made generally from a stainless steel, and in a more preferable form from a ferritic stainless steel. In one configuration, a stamping or related metal forming tool operation will introduce a negative clearance as a way to move or otherwise reallocate a portion of the material making up the sheet into other portions as a way to reduce stretching, necking, thinning and related thickness deviations associated with the bends formed in the bipolar plate.

Abstract translation: 用于燃料电池的双极板和制造双极板的方法。 片材通常由不锈钢制成，并且以更优选的形式由铁素体不锈钢制成。 在一种构造中，冲压或相关的金属成型工具操作将引入负间隙作为将构成片材的材料的一部分移动或以其它方式重新分配到其它部分的方式，以减少拉伸，颈缩，变薄和相关厚度 与双极板中形成的弯曲相关的偏差。

公开(公告)号：US09406945B2

公开(公告)日：2016-08-02

申请号：US14466244

申请日：2014-08-22

Applicant: GM Global Technology Operations LLC

Inventor： Siguang Xu ,  Joseph N. Lovria ,  Elizabeth Dicocco

IPC: H01M8/0206 ,  H01M8/10 ,  H01M8/021 ,  H01M8/0247 ,  H01M8/02

CPC classification number: H01M8/0206 ,  H01M8/021 ,  H01M8/0247 ,  H01M8/10 ,  H01M2008/1095 ,  H01M2250/20 ,  Y02P70/56 ,  Y02T90/32

Abstract: A bipolar plate used in a fuel cell and a method of making a bipolar plate. The sheet is made generally from a stainless steel, and in a more preferable form from a ferritic stainless steel. In one configuration, a stamping or related metal forming tool operation will introduce a negative clearance as a way to move or otherwise reallocate a portion of the material making up the sheet into other portions as a way to reduce stretching, necking, thinning and related thickness deviations associated with the bends formed in the bipolar plate.

Abstract translation: 用于燃料电池的双极板和制造双极板的方法。 片材通常由不锈钢制成，并且以更优选的形式由铁素体不锈钢制成。 在一种构造中，冲压或相关的金属成型工具操作将引入负间隙作为将构成片材的材料的一部分移动或以其它方式重新分配到其它部分的方式，以减少拉伸，颈缩，变薄和相关厚度 与双极板中形成的弯曲相关的偏差。

公开(公告)号：US10276878B2

公开(公告)日：2019-04-30

申请号：US15205454

申请日：2016-07-08

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Smuruthi Kamepalli ,  Balasubramanian Lakshmanan ,  Elizabeth Dicocco

IPC: H01M8/0258 ,  H01M8/1007 ,  H01M8/1004 ,  H01M8/1018

Abstract: A fuel cell flow field plate includes an aluminum substrate plate having a first side and a second side wherein the first side of the aluminum substrate plate defines a plurality of channels for transporting a first fuel cell reactant gas. The flow field plate also includes a first metal interlayer deposited on the first side of the aluminum substrate plate, a second metal interlayer deposited on the second side of the aluminum substrate plate, a first amorphous carbon layer deposited on the first metal interlayer, and a second amorphous carbon layer deposited on the second metal interlayer. The first amorphous carbon layer and second amorphous carbon layer each independently have a density greater than or equal to 1.2 g/cc.

公开(公告)号：US09985303B2

公开(公告)日：2018-05-29

申请号：US14863347

申请日：2015-09-23

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Jun Cai ,  Stephen D. Pace ,  Sergio E. Garcia ,  Elizabeth Dicocco

IPC: H01M8/04 ,  H01M8/04089 ,  H01M8/04298 ,  H01M8/04223 ,  H01M8/0444 ,  H01M8/04664 ,  H01M8/1018

CPC classification number: H01M8/04089 ,  H01M8/04231 ,  H01M8/04298 ,  H01M8/04305 ,  H01M8/04447 ,  H01M8/04679 ,  H01M2008/1095 ,  H01M2250/20 ,  Y02T90/32

Abstract: A system and method for determining whether a concentration estimation value of hydrogen gas in an anode sub-system of a fuel cell system is within a predetermined threshold of a valid hydrogen gas concentration, and if not, correcting the estimation value. The method includes providing a hydrogen gas concentration sensor value from a virtual sensor and calculating the hydrogen gas concentration estimation value using a gas concentration estimation model. The method also includes determining if a difference between the estimation value and the sensor value is greater than at least one threshold, and if so, causing an extended bleed event to occur that bleeds an anode exhaust gas to force the estimation value to be closer to the sensor value. The method also includes setting a diagnostic if multiple extended bleeds do not cause the estimation value and the sensor value to converge.