A cooling apparatus for electrical equipment, said electrical equipment including a plurality of components, and said cooling apparatus comprising: a medium passage ( 154, 156, 158, 160, 162, 164, 502, 504) having one end connected to an inlet ( 150, 152) and the other end connected to said electrical equipment, and having a plurality of cooling medium distribution routes between said inlet ( 150, 152) and said electrical equipment; and a supply unit configured to supply the cooling medium through said medium passage ( 154, 156, 158, 160, 162, 164, 502, 504) to said electrical equipment; characterized in that said electrical equipment is a power storage device, said cooling apparatus further comprising: a detecting unit ( 304, 306) configured to detect temperature difference between at least two components ( 510, 512) on upstream and downstream sides of said cooling medium among said plurality of components; and a selecting unit configured to select any one of said plurality of routes; wherein said detecting unit ( 304, 306) includes a first temperature detecting unit configured to detect a first temperature of a first component on said upstream side, and a second temperature detecting unit configured to detect a second temperature of a second component on said downstream side; and said selecting unit is configured to select, when absolute value of said detected temperature difference exceeds a predetermined value, a route that makes smaller absolute value of temperature difference between said cooling medium and either one of said two components ( 510, 512), from among said plurality of distribution routes, and said selecting unit is configured to select, when said detected second temperature is equal to or higher than a predetermined temperature, a route that maximizes the absolute value of temperature difference between said cooling medium and either one of said first and second temperatures, from among said plurality of distribution routes. a medium passage ( 154, 156, 158, 160, 162, 164, 502, 504) having one end connected to an inlet ( 150, 152) and the other end connected to said electrical equipment, and having a plurality of cooling medium distribution routes between said inlet ( 150, 152) and said electrical equipment; and a supply unit configured to supply the cooling medium through said medium passage ( 154, 156, 158, 160, 162, 164, 502, 504) to said electrical equipment; characterized in that said electrical equipment is a power storage device, said cooling apparatus further comprising: a detecting unit ( 304, 306) configured to detect temperature difference between at least two components ( 510, 512) on upstream and downstream sides of said cooling medium among said plurality of components; and a selecting unit configured to select any one of said plurality of routes; wherein said detecting unit ( 304, 306) includes a first temperature detecting unit configured to detect a first temperature of a first component on said upstream side, and a second temperature detecting unit configured to detect a second temperature of a second component on said downstream side; and said selecting unit is configured to select, when absolute value of said detected temperature difference exceeds a predetermined value, a route that makes smaller absolute value of temperature difference between said cooling medium and either one of said two components ( 510, 512), from among said plurality of distribution routes, and said selecting unit is configured to select, when said detected second temperature is equal to or higher than a predetermined temperature, a route that maximizes the absolute value of temperature difference between said cooling medium and either one of said first and second temperatures, from among said plurality of distribution routes. a detecting unit ( 304, 306) configured to detect temperature difference between at least two components ( 510, 512) on upstream and downstream sides of said cooling medium among said plurality of components; and a selecting unit configured to select any one of said plurality of routes; wherein said detecting unit ( 304, 306) includes a first temperature detecting unit configured to detect a first temperature of a first component on said upstream side, and a second temperature detecting unit configured to detect a second temperature of a second component on said downstream side; and said selecting unit is configured to select, when absolute value of said detected temperature difference exceeds a predetermined value, a route that makes smaller absolute value of temperature difference between said cooling medium and either one of said two components ( 510, 512), from among said plurality of distribution routes, and said selecting unit is configured to select, when said detected second temperature is equal to or higher than a predetermined temperature, a route that maximizes the absolute value of temperature difference between said cooling medium and either one of said first and second temperatures, from among said plurality of distribution routes.