公开(公告)号：EP1875542B1

公开(公告)日：2010-05-19

申请号：EP06722192.9

申请日：2006-03-29

Applicant: Byd Company Limited

Inventor： DONG, Junqing Intellectual Property Department BYD COMPANY Limited ,  ZHOU, Yong

IPC: H01M8/02

CPC classification number: H01M8/2483 ,  H01M8/0258 ,  H01M8/026 ,  H01M8/0263 ,  H01M8/0271 ,  H01M8/0284 ,  H01M8/241 ,  H01M8/248 ,  H01M2008/1095

Abstract: Disclosed is a flow-field plate and fuel cell stack using the same. The flow-field plate (19) of the present invention comprises a center hole (5) formed at the center of flow-field plate, a inlet (6) and a outlet (7) formed on two positions near the outer edge of flow-field plate, and flow grooves distributing around the center hole (5) and communicating with the inlet (6) and outlet (7) on one side of flow-field plate. Since the flow-field plate according to the present invention comprises flow grooves distributing around the center hole and communicating with the inlet and outlet, which is benefit for oxidant diffusion, there is no "dead-end" on the flow-field plate and reactants may distribute uniformly to each part of flow-field plate. Furthermore, resultants generated from reaction, such as water, nitrogen, carbon dioxide, etc., may be discharged in time and not accumulate on flow-field plate. Therefore, the reactant utilization ratio, the fuel cell performances and its service life may be improved.

公开(公告)号：EP1875542A1

公开(公告)日：2008-01-09

申请号：EP06722192.9

申请日：2006-03-29

Applicant: Byd Company Limited

Inventor： DONG, Junqing ,  ZHOU, Yong

IPC: H01M8/02

CPC classification number: H01M8/2483 ,  H01M8/0258 ,  H01M8/026 ,  H01M8/0263 ,  H01M8/0271 ,  H01M8/0284 ,  H01M8/241 ,  H01M8/248 ,  H01M2008/1095

Abstract: Disclosed is a flow-field plate and fuel cell stack using the same. The flow-field plate (19) of the present invention comprises a center hole (5) formed at the center of flow-field plate, a inlet (6) and a outlet (7) formed on two positions near the outer edge of flow-field plate, and flow grooves distributing around the center hole (5) and communicating with the inlet (6) and outlet (7) on one side of flow-field plate. Since the flow-field plate according to the present invention comprises flow grooves distributing around the center hole and communicating with the inlet and outlet, which is benefit for oxidant diffusion, there is no "dead-end" on the flow-field plate and reactants may distribute uniformly to each part of flow-field plate. Furthermore, resultants generated from reaction, such as water, nitrogen, carbon dioxide, etc., may be discharged in time and not accumulate on flow-field plate. Therefore, the reactant utilization ratio, the fuel cell performances and its service life may be improved.