Provided are a stator for a brushless direct-current (BLDC) motor, a BLDC motor having a double-rotor/single-stator structure, and a vehicle cooler using the same, which uses a printed circuit board for an assembly that automatically sets an assembly position of stator core assemblies, to thereby secure waterproof, light-weight, and high power features. The stator includes a holder, a boss which has built-in bearings in order to support a rotational axis, and which enables the rotational axis to be rotated, a number of stator core assemblies which respectively enclose bobbins having inner and outer flanges at the inner and outer sides of a number of division type stator cores and in which coils are wound around the bobbins, and a printed circuit board for an assembly in which each stator core assembly is automatically position-set and then assembled and both end portions of the coil are mutually connected by each phase of U, V and W. After each stator core assembly has been temporarily assembled on the assembly PCB, the stator core assembly is insert molded using thermosetting resin to thereby integrally form the holder and the boss in the stator.