Power control device and power control method for measuring open-circuit voltage of battery

摘要

A power control device includes a relay switch, a controller, a sensor and a battery controller. The relay switch is configured to turn electricity on and off between a battery for supplying a load with electric power and the load. The controller predicts load power characteristics indicating characteristics of power consumed by the load over time, and predicts, based on the predicted load power characteristics, charge/discharge power characteristics indicating characteristics of charge/discharge power of the battery over time. The sensor detects voltage between the terminals of the battery. The controller specify a voltage detection period from the charge/discharge power characteristics that was predicted, over which the charge/discharge power of the battery is equal to or less than a prescribed power over a prescribed period. The battery controller turns off the relay switch and detects the voltage between the battery terminals during the voltage detection period.

主权项

1. A power control device comprising:
a relay switch configured to be connected between a battery for supplying a load with electric power and the load, the relay switch being configured to switch between turning electricity on and off from the battery; a controller programmed to predict a load power characteristic indicating power consumed by the load over time, and to predict, based on the predicted load power characteristic, a charge/discharge power characteristic indicating power charged/discharged by the battery over time; a sensor configured to detect voltage between terminals of the battery; and a battery controller operatively coupled to the relay switch, and programmed to selectively control the relay switch, the controller being programmed to specify a voltage detection period from the charge/discharge power characteristic that was predicted, over which the power charged/discharged by the battery is equal to or less than a prescribed power over a prescribed period, and the battery controller being programmed to turn off the relay switch and to detect an open-circuit voltage based on the voltage between terminals of the battery during the voltage detection period.