Hydraulic system, driving system and electric vehicle

摘要

A hydraulic system of an electric vehicle may comprise: an oil container (1); a first and a second clutch driving circuits (L1, L2) connected in parallel; an internal pump (5) driven by a driving system of the electric vehicle; a fifth check valve (8) connected in series at an outlet side of the internal pump (5); an external pump (13) driven by an external pump motor (M); and a sixth check valve (14) connected in series at an outlet side of the external pump (13). The fifth check valve (8) and the internal pump (5) connected in series and the sixth check valve (14) and the external pump (13) connected in series may be connected in parallel between the oil container (1) and the first and second clutch driving circuits (L1, L2). A driving system and an electric vehicle comprising the same may also be provided.