Non-contact power supply apparatus, charging apparatus, and battery apparatus
A charging apparatus maintains a balance in power between battery cells by respectively charging the battery cells with power, and rapidly charges the battery cells with power. The charging apparatus supplying unit wirelessly supplying power, and the battery apparatus includes a plurality of charging units corresponding to a plurality of battery cells in a one-to-one scheme. Each of the plurality of charging units respectively includes a charging unit charging a corresponding battery cell with power wirelessly received from the power supplying unit.
1. A non-contact power supply apparatus comprising:
power transmitting coils transmitting power to battery cells provided in a single target charging device in a non-contact manner; and
a power conversion unit converting input power into output powers, adjusting a level of each of the output powers in response to power state signals transmitted by the single target charging device until all of voltage levels of powers received by the battery cells are within reference voltage range, and applying each of output powers to each of the power transmitting coils, respectively.
2. The non-contact power supply apparatus of claim 1 , wherein the power conversion unit adjusts the level of each of the output powers such that all of voltage levels of powers received by the plurality of battery cells are same as one of a minimum voltage level, a maximum voltage level, and an intermediate voltage level all of voltage levels of powers received by the plurality of battery cells, and after, all of voltage levels of powers received by the plurality of battery cells are within the reference voltage range.
3. The non-contact power supply apparatus of claim 1 , wherein the power conversion unit adjusts the level of the output power in response to the power state signals transmitted by charging units respectively charging the battery cells.
4. The non-contact power supply apparatus of claim 3 , wherein the power conversion unit adjusts the level of the output power, based on a power state signal, provided by a charging unit having a minimum power level, from among the power state signals transmitted by the charging units.
5. The non-contact power supply apparatus of claim 1 , wherein the power conversion unit adjusts at least one of a power switching duty and a power switching down time.