Control apparatus and control method for electric storage apparatus

摘要

A control apparatus controlling discharge of a secondary battery such that a discharge power of the secondary battery does not exceed an upper limit value has a current sensor and a controller. The current sensor detects a current value during charge and discharge of the secondary battery. The controller calculates an evaluation value for determining a first deterioration component depending on nonuniformity of an ion concentration in an electrolyte of the secondary battery by using the detection result of the current sensor, and reduces the upper limit value when the integral value of the evaluation values exceeding a target value exceeds a threshold value. The controller estimates a second deterioration component depending on the material of the secondary battery and changes the threshold value such that deterioration due to the first deterioration component is permitted in association with the second deterioration component.

主权项

1. A control apparatus configured to control discharge of a secondary battery such that a discharge power of the secondary battery does not exceed an upper limit value, comprising:
a current sensor detecting a current value during charge and discharge of the secondary battery; and a controller calculating an evaluation value from a discharge state detected by using the current sensor, and reducing the upper limit value when an integral value of the evaluation value exceeds a threshold value, the integral value being calculated by performing integration of at least a part of the evaluation value that exceeds a target value, the evaluation value for evaluating a first deterioration component reducing output performance of the secondary battery with nonuniformity of an ion concentration in an electrolyte due to discharge of the secondary battery, wherein the controller estimates a second deterioration component representing deterioration of a negative electrode material and/or a positive electrode material of the secondary battery, and changes the threshold value such that an increase in the integral value until the integral value reaches the threshold value is reduced as the second deterioration component is increased, and the increase in the integral value until the integral value reaches the threshold value is increased as the second deterioration component is reduced.