Contactless power transmitting system having overheat protection function and method thereof

Disclosed herein are a contactless power transmitting system having an overheat protection function capable of preventing damage of a battery cell module (250) due to overheat in the case in which a power is charged in the battery cell module, and a method thereof. In the contactless power transmitting system, a contactless power transmitting apparatus (100) transmits a first power to a contactless power receiving apparatus (200) through a power transmitting coil (140) to charge the first power in the battery cell module (250) and transmits a second power lower than the first power to the contactless power receiving apparatus (200) through the power transmitting coil (140) to charge the second power in the battery cell module (250) in the case in which an overheat alarm signal is received from the contactless power receiving apparatus (200), thereby making it possible to fully charge the power in the battery cell module (250) while preventing the overheat of the battery cell module.