公开(公告)号：US20030113600A1

公开(公告)日：2003-06-19

申请号：US10017483

申请日：2001-12-14

Applicant: Ballard Power Systems Inc.

Inventor： David S. Wardrop ,  Michael Sexsmith ,  Russell H. Barton

IPC: H01M008/04

CPC classification number: H01M8/04559 ,  H01M8/0494

Abstract: A fuel cell system for powering a work load includes a fuel cell stack and a shunt regulator having a threshold detection; transistorized power switching element, and a dump load. The threshold detection element identifies when an abnormally high voltage rises. The power switching element routes power from the high voltage buss to the dump load. The dump load acts as an electrical energy sink, and may provide dissipated energy to the fuel cell stack in the form of heat. The switching element can also shunt power to the dump load when a digital control signal is set, for example at startup or during cold start conditions.

Abstract translation: 用于为工作负载供电的燃料电池系统包括燃料电池堆和具有阈值检测的分流调节器; 晶体管功率开关元件和转储负载。 阈值检测元件识别异常高电压何时上升。 电源开关元件将电源从高压总线传送到转储负载。 倾卸载荷用作电能吸收器，并且可以以热的形式向燃料电池堆提供耗散的能量。 当设置数字控制信号时，例如在启动时或在冷启动条件下，开关元件还可以分流转储负载的电力。

公开(公告)号：US20040231530A1

公开(公告)日：2004-11-25

申请号：US10871227

申请日：2004-06-18

Applicant: Ballard Power Systems Inc.

Inventor： Donald A. Lines ,  Nicholas A. Fletcher ,  Eric G. Pow ,  Michael Sexsmith ,  Bill Gray ,  Horst Thumm

IPC: B41F019/02

CPC classification number: B29C43/3607 ,  B29C43/003 ,  B29C43/36 ,  B29C43/56 ,  B29C2043/025 ,  B29C2043/566 ,  H01M8/0206 ,  H01M8/0213 ,  H01M8/0228 ,  Y10T29/10 ,  Y10T156/1023 ,  Y10T156/1039 ,  Y10T156/1056

Abstract: A method for embossing expanded graphite sheet material comprises removing at least a portion of the gas from within the material by exposing the material to a pressure less than atmospheric pressure, and then embossing the material. The pressure to which the material is exposed is preferably no greater than about 400 torr. An apparatus for embossing expanded graphite sheet material at a pressure less than atmospheric pressure comprises: an embossing device, a compression device adapted to urge the embossing device against the material, an embossing chamber comprising the at least one embossing device and adapted to receive the material and to be substantially gas-tight at least when the embossing device is urged against the material by the pressing device, and an evacuation device for reducing the pressure within the embossing chamber.

Abstract translation: 用于压花膨胀石墨片材的方法包括通过将材料暴露于低于大气压的压力，然后对材料进行压花来从材料内除去至少一部分气体。 材料暴露的压力优选不大于约400托。 一种用于在低于大气压力的压力下对膨胀石墨片材进行压花的装置包括：压花装置，适于将压花装置推靠在材料上的压缩装置，包括至少一个压花装置并适于接纳材料的压花室 并且至少当压花装置通过加压装置被推靠在材料上时基本上不气密，以及用于降低压花室内的压力的排气装置。

公开(公告)号：US20030224227A1

公开(公告)日：2003-12-04

申请号：US10159594

申请日：2002-05-30

Applicant: Ballard Power Systems Inc.

Inventor： Henry H. Voss ,  Russell H. Barton ,  Michael Sexsmith ,  Mark J. Turchyn

IPC: H01M008/04 ,  H01M004/92 ,  H01M008/10

CPC classification number: H01M8/04225 ,  H01M4/8605 ,  H01M8/0258 ,  H01M8/04223 ,  H01M8/1004 ,  H01M8/241 ,  H01M8/2457 ,  H01M8/2465 ,  H01M8/2483 ,  Y02P70/56

Abstract: Certain fuel cells (e.g., solid polymer electrolyte fuel cells) may temporarily exhibit below normal performance after initial manufacture or after prolonged storage. While normal performance levels may be obtained after operating such fuel cells for a suitable time period, this process can take of order of days to fully complete. However, various conditioning and/or maintenance techniques are disclosed that provide for normal performance levels without the need for a lengthy initial operating period.

Abstract translation: 某些燃料电池（例如，固体聚合物电解质燃料电池）在初始制造之后或在长时间储存​​之后可能暂时低于正常性能。 虽然在合适的时间段内操作这种燃料电池之后可以获得正常的性能水平，但该过程可能需要几天的时间才能完全完成。 然而，公开了提供正常性能水平的各种调理和/或维护技术，而不需要冗长的初始操作周期。