US 2013/0293200 A1 · CONTROL APPARATUS AND CONTROL METHOD FOR ELECTRIC STORAGE APPARATUS

Abstract

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.

Claims17

Dependent claims

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 exceeding a target value exceeds a threshold 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 constituent material contributing to the charge and discharge 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.

1 more element

A control method for controlling discharge of a secondary battery such that a discharge power of the secondary battery does not exceed an upper limit value, comprising the steps of:

detecting a current value during charge and discharge of the secondary battery by using a current sensor;
calculating an evaluation value from a discharge state detected by using the current sensor, 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;
determining whether or not the evaluation value exceeds a target value and reducing the upper limit value when an integral value of the evaluation value exceeding a target value exceeds a threshold value,
estimating a second deterioration component representing deterioration of a constituent material contributing to the charge and discharge of the secondary battery;
changing 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.

2 more elements

Dependencies are inferred from the claim text.

Control apparatus and control method for electric storage apparatus

Life of this patent

Control apparatus and control method for electric storage apparatus

Life of this patent

Abstract

Claims17