Hybrid working machine and electric power accumulation controller

摘要

A hybrid working machine includes a first electric motor performing a power running operation of being driven with supplied electric power and a regenerative operation of generating electric power; a first electric circuit controlling the output of the first electric motor; a battery supplying the first electric motor with the electric power and storing the regenerated electric power from the first electric motor; a charge and discharge circuit controlling the charging current and the discharge current of the battery; and a controller controlling the charge and discharge of the battery for driving the machine. The controller calculates a level representing a proportion by which the output of the battery is limited with respect to each of multiple conditions related to the output of the battery. The controller limits the charging current and the discharge current of the battery based on the calculated levels.

主权项

1. A hybrid working machine, comprising:
a first electric motor configured to perform a power running operation of being driven with supplied electric power and a regenerative operation of generating electric power; a first electric circuit configured to control an output of the first electric motor; an electric power accumulator configured to supply the first electric motor with the electric power and to store the regenerated electric power from the first electric motor; a charge and discharge circuit configured to control a charging current and a discharge current of the electric power accumulator; and a controller configured to control charge and discharge of the electric power accumulator for driving the machine, wherein the controller is configured to calculate a level representing a proportion by which an output of the electric power accumulator is limited with respect to each of multiple conditions related to the output of the electric power accumulator, and to limit the charging current and the discharge current of the electric power accumulator based on the calculated levels, and wherein control information related to the multiple conditions includes information representing outside air temperature, information representing a setting of an operating condition of the machine, information representing degradation of the electric power accumulator, and information representing a failure condition of the machine.