Method and apparatus for detecting state of charge of battery
AssigneeLite-On Clean Energy Technology Corp.
InventorsYueh-Teng HSU, Chia-Fu Yeh
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Abstract
A method for detecting a state of charge (SOC) of a battery is disclosed. The method includes inputting a pulse to the battery for receiving a response curve of the battery associated with the pulse inputted to the battery, determining a set of parameters for preparing a simulated curve, comparing a difference between the response curve and the simulated curve, determining whether the difference between the simulated curve and the response curve is less than a predetermined threshold before further utilizing the parameters to determine the SOC from a corresponding relationship.
Claims17
A method for detecting a state of charge (SOC) of a battery, comprising the steps of:
- (a) inputting a pulse to the battery to measure a response curve of the battery associated with the pulse;
- (b) determining a set of parameters of the battery;
- (c) calculating a simulated curve of the battery associated with the pulse according to the set of the parameters;
- (d) comparing a difference between the simulated curve and the response curve to a predetermined threshold;
- (e) when STEP (d) determines the difference is larger than the predetermined threshold, returning to STEP (b);
- and
- (f) otherwise, querying a corresponding relationship according to the set of the parameters so as to determine the SOC of the battery, in which the corresponding relationship records a correspondence between the SOC of the battery and a resistance of a charge transfer resistor (Rct) of the battery.
An apparatus for detecting state of charge (SOC) of a battery, comprising:
- a pulse generator, which outputs a pulse to the battery;
- an analog/digital converter, which detects the battery;
- and
- a controller coupled to the pulse generator and the analog/digital converter, wherein the controller controls the pulse generator to output the pulse and measures a response curve of the battery associated with the pulse through the analog/digital converter, wherein the controller calculates a simulated curve of the battery associated with the pulse and determines whether a difference between the simulated curve and the response curve is larger than a predetermined threshold;
- wherein the simulated curve is determined according to a set of parameters of the battery associated with the pulse, the controller determines the SOC of the battery with the set of the parameters by querying a corresponding relationship, and the corresponding relationship records a correspondence between the SOC of the battery and a resistance of a charge transfer resistor of the battery.
Dependencies are inferred from the claim text.