Patent ID: 8764417

Claim:
An electric pump system for a vehicle, comprising: an electric pump comprising a pump body divided into a motor room and a pump room, a shaft connected to the motor room and the pump room interposing a sealing unit, and an impeller mounted on the shaft in the pump room; and a fuel cell stack comprising a reaction gas exhaust portion that exhausts reaction gas, wherein a leachate exhaust passage for exhausting leachate that is leaked through the sealing unit is formed in the pump body, the leachate exhaust passage connected to the reaction gas exhaust portion of the fuel cell stack via a connection pipe, wherein an exhaust passage through which steam is exhausted is formed in the pump body, wherein the steam is formed via the sealing unit, and wherein the steam exhaust passage intakes outside air when an exhaust pressure of the reaction gas is raised within the reaction gas exhaust portion.