| CPC F04D 29/445 (2013.01) [F04D 1/00 (2013.01); F04D 13/06 (2013.01); H01M 8/04029 (2013.01)] | 9 Claims |
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1. A fluid pump for a fuel cell system having at least one fuel cell stack of multiple fuel cells,
wherein the fluid pump comprises an impeller unit for delivering a cooling fluid with an impeller that is rotatable about an axis of rotation and an electric motor for driving the impeller with a motor housing,
wherein the impeller unit is arranged at an, with respect to the axis of rotation, axial longitudinal end of the motor,
wherein the impeller unit comprises an inlet side with a fluid inlet and an outlet side with a fluid outlet and the impeller separates the inlet side and the outlet side from one another,
wherein the fluid pump comprises a guide channel for the cooling fluid and the guide channel fluidically connects the inlet side and the outlet side via the impeller,
characterised
in that a cooling fluid jacket is formed in the motor housing,
wherein the cooling fluid jacket comprises multiple forward channels,
wherein the respective multiple forward channels, via an inlet opening each, are fluidically connected to the outlet side of the impeller unit and are joined to form a common channel at a longitudinal end of the motor facing away from the impeller unit, and
in that the cooling fluid jacket further comprises at least one connecting channel and at least one return channel, and
each of the multiple forward channels leads from the outlet side of the impeller unit to the at least one connecting channel and the at least one connecting channel leads from each of the multiple forward channels to the at least one return channel and the at least one return channel leads from the at least one connecting channel to the inlet side of the impeller unit.
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