Contactless power transmitting system having overheat protection function and method thereof

摘要

Disclosed herein are a contactless power transmitting system having an overheat protection function, which protects a battery cell module from damage due to overheating while the battery cell module is being charged, and a method thereof. In the contactless power transmitting system, a contactless power transmitting apparatus transmits a first power to a contactless power receiving apparatus through a power transmitting coil to charge the battery cell module with the first power, and transmits a second power, of lower wattage than the first power, to the contactless power receiving apparatus through the power transmitting coil to charge the battery cell module with the second power if an overheat alarm signal is received from the contactless power receiving apparatus, thereby making it possible to fully charge the battery cell module while preventing overheating of the battery cell module.

主权项

1. A wireless power transmitting method of a wireless power transmitting apparatus in a system to wirelessly charge a power, the method comprising:
detecting approach of a wireless power receiving apparatus based on a change in impedance of a power transmitting coil, and verifying the wireless power receiving apparatus; wirelessly transmitting a first power to the wireless power receiving apparatus; and wirelessly transmitting a second power having a lower power level than the first power to the wireless power receiving apparatus when an overheat alarm signal is received from the wireless power receiving apparatus during a process of transmitting the first power to the wireless power receiving apparatus.