Stator core, motor, compressor, and vehicle

A stator core comprising:

• a plurality of block cores, wherein:
• the plurality of block cores are sequentially connected end to end along an axis of the stator core, and each of the block cores comprises a plurality of laminations that are stacked;
• each of the block cores comprises a stator yoke and a stator tooth that are connected to each other, the stator tooth is located between the stator yoke and the axis of the stator core, and the stator yokes and the stator teeth of any two adjacent block cores define a stator slot, wherein the stator tooth comprises:
• a tooth body connected to the stator yoke;
• and
• a tooth crown connected to one end, facing away from the stator yoke, of the tooth body, wherein the tooth crown comprises a first pole shoe and a second pole shoe, wherein the first pole shoe and the second pole shoe are located on two sides of the tooth body in the circumferential direction of the stator core, and wherein a projection of the tooth crown in a plane normal to an axial direction of the stator core is asymmetrical about a radial line bisecting the tooth body;
• a wall surface, facing the axis of the stator core, of the stator yoke is a spliced surface;
• and
• along a circumferential direction of the stator core, a smooth transition is provided in at least part of a joint of any two adjacent spliced surfaces,
• wherein the plurality of laminations of each of the block cores comprises:
• a plurality of first lamination layers and a plurality of second lamination layers, wherein in the axial direction of the stator core, one of the second lamination layers is sandwiched between any two adjacent first lamination layers, the first lamination layer comprises a single first lamination, and the second lamination layer comprises a single second lamination,
• wherein:
• in the circumferential direction of the stator core, first sides of the first lamination layers are provided with overlapping portions, and second sides of the first lamination layers are provided with notch portions;
• in the circumferential direction of the stator core, first sides of the second lamination layers are provided with the notch portions, and second sides of the second lamination layers are provided with the overlapping portions;
• and
• in the axial direction of the stator core, two adjacent overlapping portions are located on two sides of the notch portion and define an overlapping gap,
• wherein when the two adjacent block cores are connected to each other in a matched manner, an overlapping portion of one of the block cores is configured to be inserted into an overlapping gap of the other block core, and a height of part of the overlapping portion in a circle forming process is smaller than a distance between the overlapping gaps, wherein the part is inserted into the overlapping gap first, wherein the overlapping portion comprises:
• an insertion portion inserted into the overlapping gap;
• and
• a guide portion arranged on the insertion portion and inserted first into the overlapping gap in a circle forming process, wherein the guide portion has a smaller height than the insertion portion.