A stator, comprising: a stator core comprising a plurality of stator teeth and a core oil passage extending in an axial direction of the stator; and a stator winding wound on the plurality of stator teeth, a projection of the stator winding and a projection of the core oil passage in the axial direction of the stator being at least partially overlapped, wherein the core oil passage comprises a spiral first oil passage section, the stator core comprises a first lamination and a second lamination stacked with each other, the first lamination has a first oil hole passing through the first lamination along the axial direction of the stator, the second lamination has a second oil hole passing through the second lamination along the axial direction of the stator, the first oil hole and the second oil hole are staggered in a peripheral direction of the stator and in partial communication with each other, and at least one first lamination is adjacent to at least one second lamination to define the first oil passage section, wherein the core oil passage passes through the stator core along the axial direction of the stator, and at least one port of the core oil passage defines a core oil outlet; the stator winding comprises a winding end, and the winding end is at a side of the stator core in the axial direction of the stator; and a projection of the core oil outlet and a projection of the winding end in the axial direction of the stator are at least partially overlapped; wherein the core oil passage comprises a first portion and a second portion, the first portion is farther away from an axis of the stator than the second portion in the radial direction of the stator, and the core oil outlet is arranged in the second portion; wherein the stator core comprises a yoke portion coupled to the stator teeth, the first portion is in the yoke portion, and at least part of the second portion is in the stator teeth; wherein the first portion and the second portion are staggered in a radial direction of the stator, the core oil passage further comprises a third portion, and the first portion is in communication with the second portion through the third portion; wherein a part of the third portion is in the yoke portion, and the other part of the third portion is in the stator teeth, and the first portion comprises the first oil passage section, characterized in that the first portion and the second portion are respectively located at two sides of the third portion in the axial direction, and the third portion is between the first portion and the second portion in the axial direction of the stator, and the third portion has a radially outer end connected to an end of the first portion and a radially inner end connected to an end of the second portion. a stator core comprising a plurality of stator teeth and a core oil passage extending in an axial direction of the stator; and a stator winding wound on the plurality of stator teeth, a projection of the stator winding and a projection of the core oil passage in the axial direction of the stator being at least partially overlapped, wherein the core oil passage comprises a spiral first oil passage section, the stator core comprises a first lamination and a second lamination stacked with each other, the first lamination has a first oil hole passing through the first lamination along the axial direction of the stator, the second lamination has a second oil hole passing through the second lamination along the axial direction of the stator, the first oil hole and the second oil hole are staggered in a peripheral direction of the stator and in partial communication with each other, and at least one first lamination is adjacent to at least one second lamination to define the first oil passage section, wherein the core oil passage passes through the stator core along the axial direction of the stator, and at least one port of the core oil passage defines a core oil outlet; the stator winding comprises a winding end, and the winding end is at a side of the stator core in the axial direction of the stator; and a projection of the core oil outlet and a projection of the winding end in the axial direction of the stator are at least partially overlapped; wherein the core oil passage comprises a first portion and a second portion, the first portion is farther away from an axis of the stator than the second portion in the radial direction of the stator, and the core oil outlet is arranged in the second portion; wherein the stator core comprises a yoke portion coupled to the stator teeth, the first portion is in the yoke portion, and at least part of the second portion is in the stator teeth; wherein the first portion and the second portion are staggered in a radial direction of the stator, the core oil passage further comprises a third portion, and the first portion is in communication with the second portion through the third portion; wherein a part of the third portion is in the yoke portion, and the other part of the third portion is in the stator teeth, and the first portion comprises the first oil passage section, characterized in that the first portion and the second portion are respectively located at two sides of the third portion in the axial direction, and the third portion is between the first portion and the second portion in the axial direction of the stator, and the third portion has a radially outer end connected to an end of the first portion and a radially inner end connected to an end of the second portion.