Cooling pipe of electric vehicle battery

A cooling pipe of an electric vehicle battery that is coupled to a first side and a second side of a radiator, passes between each of a plurality of battery module in a battery pack, and cools the plurality of battery modules, comprising:

• a body pipe of a pipe shape so that a flow path, through which a cooling fluid flows, is formed therein and comprising an inlet on a first end of the body pipe and an outlet on a second end of the body pipe, wherein the inlet is coupled to the first side of the radiator and the outlet is coupled to the second side of the radiator;
• a corrugated pipe that is integrally formed with the body pipe and comprises a plurality of corrugations between the inlet and the outlet;
• an expansion stopper made of rubber disposed along a circumference of the body pipe and tightly coupled to a surface of the corrugated pipe;
• wherein the corrugated pipe comprises:
• a plurality of expansion tubes whose circumference is wider than the circumference of the body pipe;
• and
• a plurality of spacers that are arranged between each of the plurality of expansion tubes to form a gap therebetween and are formed to have a circumference smaller than or equal to the circumference of the body pipe,
• wherein the plurality of expansion tubes and the plurality of spacers are alternately disposed along the flow path,
• wherein the expansion stopper comprises an incision groove such that the expansion stopper is widened by applying physical force when the expansion stopper is coupled to the surface of the corrugated pipe, and
• wherein the expansion stopper comprises:
• a plurality of first portions comprising first cross protrusions alternately arranged between the expansion tubes and the spacers;
• and
• a plurality of second portions comprising second cross protrusions alternately arranged between the expansion tubes and the spacers, and
• wherein the plurality of first portions and the plurality of second portions are connected to each other.