| 摘要 |
PURPOSE: A cooling water circulation apparatus for an electric vehicle is provided to employ smaller quantity of cooling water at the initial stage of starting and to improve the starting performance. CONSTITUTION: The cooling water circulation apparatus(200) for an electric vehicle comprises a fuel cell stack(110) comprising a cooling water part(111), a positive electrode part(113) and a negative electrode part(115), a gas separator(171), a deionizing device(185), a radiator(187), a first/second cooling water storage parts(173,130), first/second pumps(189,131), a first/second/third paths(120,170) and a first/second/third valves(140,160,180). a first/second pumps(189,131) control the flow of cooling water. The first valve(140) mounted on the first path(120) is opened at the initial stage of starting, the second valve(160) mounted on the second path is opened according the pressure of water generated in the positive electrode part(113), and the third valve(180) mounted on the third path(170) is opened when high voltage is generated in the fuel cell stack after operation of the vehicle to supply the fuel cell stack(110) with cooling water. |
