Patent ID: 9124133
Filing Date: 2015-09-01
Classification: E02F,H02J,Y02T

Abstract:
1. A charging apparatus for a construction machine including an engine for rotating a pump, a generator to be rotated by a drive force of the engine, a low-voltage battery for storing power from the generator, and a high-voltage battery connected in parallel with the low-voltage battery with respect to the generator and adapted to store power from the generator, comprising: a switching circuit which switches between a first state and a second state, the first state being a state where the power from the generator is not supplied to the high-voltage battery but is supplied to the low-voltage battery, the second state being a state where the power from the generator is supplied to the high-voltage battery; a high-voltage conversion circuit provided between the switching circuit and the high-voltage battery which converts a low voltage into a high voltage; and a controller which determines whether a charge capacity of the low-voltage battery has reached a threshold, outputs a signal to the switching circuit to switch to the first state when the charge capacity of the low-voltage battery is equal to or below the threshold, for supplying the power of the generator to the low-voltage battery while not supplying the power of the generator to the high-voltage battery, and outputs a signal to the switching circuit to switch to the second state when the charge capacity of the low-voltage battery has reached the threshold, for charging the high-voltage battery, the threshold being a value of the charge capacity of the low-voltage battery when the low-voltage battery is fully charged.