公开(公告)号：US09958406B1

公开(公告)日：2018-05-01

申请号：US14559214

申请日：2014-12-03

Applicant: BLOOM ENERGY CORPORATION

Inventor： Cheng-Yu Lin ,  Daniel Darga ,  Michael Groesch ,  Harald Herchen ,  Vijay Srivatsan

IPC: G01N25/16 ,  G01N27/02

CPC classification number: G01N25/16 ,  G01N27/026

Abstract: Methods and systems for measuring and/or estimating a coefficient of thermal expansion (CTE) of a component of a fuel cell system. A CTE measurement technique includes securing a measurement member over a surface of the component via a seal having a melting point, heating the seal above its melting point of the seal, cooling the component, measurement member and seal to a second temperature below the melting point of the seal, and determining the CTE of the component based on the change in the span of the measurement member after cooling. A fuel cell component characterization technique includes measuring an electrical resistivity (ER), conductivity (EC), resistance or conductance of the component, measuring at least one additional property of the component which, together with ER, EC, resistance or conductance, correlates to the CTE of the component, and sorting the component based on the measurements.

公开(公告)号：US10962492B2

公开(公告)日：2021-03-30

申请号：US15927415

申请日：2018-03-21

Applicant: BLOOM ENERGY CORPORATION

Inventor： Cheng-Yu Lin ,  Daniel Darga ,  Michael Groesch ,  Harald Herchen ,  Vijay Srivatsan

IPC: G01N25/16 ,  G01N27/02

Abstract: Methods and systems for measuring and/or estimating a coefficient of thermal expansion (CTE) of a component of a fuel cell system. A CTE measurement technique includes securing a measurement member over a surface of the component via a seal having a melting point, heating the seal above its melting point of the seal, cooling the component, measurement member and seal to a second temperature below the melting point of the seal, and determining the CTE of the component based on the change in the span of the measurement member after cooling. A fuel cell component characterization technique includes measuring an electrical resistivity (ER), conductivity (EC), resistance or conductance of the component, measuring at least one additional property of the component which, together with ER, EC, resistance or conductance, correlates to the CTE of the component, and sorting the component based on the measurements.

公开(公告)号：US09673457B2

公开(公告)日：2017-06-06

申请号：US14072375

申请日：2013-11-05

Applicant: Bloom Energy Corporation

Inventor： Vijay Srivatsan ,  Michael Groesch ,  Daniel Darga ,  Matthias Gottmann ,  Ram Ramanan ,  Paturi Balaji Narasimha Prasad ,  Ramesha Guntanur ,  Ananda Sundararajan ,  Sachin Parhar

IPC: H01M8/0247 ,  H01M8/0276 ,  H01M8/0228 ,  H01M8/0258 ,  H01M8/124

CPC classification number: H01M8/0247 ,  H01M8/0228 ,  H01M8/0258 ,  H01M8/0276 ,  H01M2008/1293 ,  Y02E60/50 ,  Y02E60/525

Abstract: Various embodiments include interconnects and/or end plates having features for reducing stress in a fuel cell stack. In embodiments, an interconnect/end plate may have a window seal area that is recessed relative to the flow field to indirectly reduce stress induced by an interface seal. Other features may include a thicker protective coating and/or larger uncoated area of an end plate, providing a recessed portion on an end plate for an interface seal, and/or recessing the fuel hole region of an interconnect relative to the flow field to reduce stress on the fuel cell. Further embodiments include providing intermittent seal support to minimize asymmetric seal loading and/or a non-circular seal configuration to reduce stress around the fuel hole of a fuel cell.

公开(公告)号：US20180217075A1

公开(公告)日：2018-08-02

申请号：US15927415

申请日：2018-03-21

Applicant: BLOOM ENERGY CORPORATION

Inventor： Cheng-Yu Lin ,  Daniel Darga ,  Michael Groesch ,  Harald Herchen ,  Vijay Srivatsan

IPC: G01N25/16 ,  G01N27/02

CPC classification number: G01N25/16 ,  G01N27/026

Abstract: Methods and systems for measuring and/or estimating a coefficient of thermal expansion (CTE) of a component of a fuel cell system. A CTE measurement technique includes securing a measurement member over a surface of the component via a seal having a melting point, heating the seal above its melting point of the seal, cooling the component, measurement member and seal to a second temperature below the melting point of the seal, and determining the CTE of the component based on the change in the span of the measurement member after cooling. A fuel cell component characterization technique includes measuring an electrical resistivity (ER), conductivity (EC), resistance or conductance of the component, measuring at least one additional property of the component which, together with ER, EC, resistance or conductance, correlates to the CTE of the component, and sorting the component based on the measurements.

公开(公告)号：US20140127602A1

公开(公告)日：2014-05-08

申请号：US14072375

申请日：2013-11-05

Applicant: Bloom Energy Corporation

Inventor： Vijay Srivatsan ,  Michael Groesch ,  Daniel Darga ,  Matthias Gottmann ,  Ram Ramanan ,  Paturi Balaji Narasimha Prasad ,  Ramesha Guntanur ,  Ananda Sundararajan ,  Sachin Parhar

IPC: H01M8/02

CPC classification number: H01M8/0247 ,  H01M8/0228 ,  H01M8/0258 ,  H01M8/0276 ,  H01M2008/1293 ,  Y02E60/50 ,  Y02E60/525

Abstract: Various embodiments include interconnects and/or end plates having features for reducing stress in a fuel cell stack. In embodiments, an interconnect/end plate may have a window seal area that is recessed relative to the flow field to indirectly reduce stress induced by an interface seal. Other features may include a thicker protective coating and/or larger uncoated area of an end plate, providing a recessed portion on an end plate for an interface seal, and/or recessing the fuel hole region of an interconnect relative to the flow field to reduce stress on the fuel cell. Further embodiments include providing intermittent seal support to minimize asymmetric seal loading and/or a non-circular seal configuration to reduce stress around the fuel hole of a fuel cell.

Abstract translation: 各种实施例包括具有用于减少燃料电池堆中的应力的特征的互连和/或端板。 在实施例中，互连/端板可以具有相对于流场凹陷的窗口密封区域，以间接地减小由界面密封引起的应力。 其他特征可以包括较厚的保护涂层和/或端板的较大的未涂覆区域，在端板上提供用于界面密封件的凹陷部分和/或使互连件的燃料孔区域相对于流场凹陷以减少 对燃料电池的压力。 进一步的实施例包括提供间歇密封支撑以最小化非对称密封装载和/或非圆形密封构型以减少燃料电池燃料孔附近的应力。