INDUCTIVELY POWERED BATTERY CHARGER

摘要

Loosely coupled inductive power for charging batteries is rectified from a first power pickup winding and the resulting current source is connected to a battery unit (309). Each current source is controlled by shorting a second resonant winding (304). Battery banks may be charged using multiple isolated position-tolerant pickups independently controlled according to the condition of the connected battery unit and by overall commands communicated over an isolated link. The battery unit may be a single cell. In a self-stabilising bank or monoblock a primary inductive conductor is energised using all the cells, individual cells are separately monitored by control means and any below-average cell can be individually charged from the inductive conductor, thus correcting between-cell variations. The charge in all cells within a bank can be held within (for example) 30 % to 70 % of full charge and prevented from drifting towards full or empty during repetitive charge and discharge times.