Charger and charging method
First Claim
1. A method for charging a battery, comprising:
- (a) charging the battery with a constant charging power until a battery voltage reaches a predetermined voltage; and
(b) when the battery voltage reaches the predetermined voltage, charging the battery with a charging current for a predetermined charging time, wherein the charging current is less than a charging current during the charging with the constant charging power, wherein the charging time for the first time is a predetermined first value and the charging time is a changing value dependent upon a determined battery capacity, ending charging if the charging time is less than a predetermined second value; and
(c) determining if the battery voltage is less than the predetermined voltage;
if yes returning to step (b);
if no, charging the battery until the battery voltage reaches an actual voltage threshold, exceeding the predetermined voltage, and returning to step (b).
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Accused Products
Abstract
A method for charging a battery includes charging the battery with a constant charging power until a battery voltage reaches a predetermined voltage. After the battery voltage reaches the predetermined voltage, charging the battery with a first charging current at least once to a voltage threshold that exceeds the predetermined voltage. A charging time in the charging process with the first charging current for the first time is a predetermined value. Subsequent charges provided in the charging process with the first charging current is a changing value according to a battery capacity. The voltage threshold exceeding the predetermined voltage is changed according to voltage variations in the charging process with the first charging current.
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Citations
9 Claims
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1. A method for charging a battery, comprising:
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(a) charging the battery with a constant charging power until a battery voltage reaches a predetermined voltage; and (b) when the battery voltage reaches the predetermined voltage, charging the battery with a charging current for a predetermined charging time, wherein the charging current is less than a charging current during the charging with the constant charging power, wherein the charging time for the first time is a predetermined first value and the charging time is a changing value dependent upon a determined battery capacity, ending charging if the charging time is less than a predetermined second value; and (c) determining if the battery voltage is less than the predetermined voltage;
if yes returning to step (b);
if no, charging the battery until the battery voltage reaches an actual voltage threshold, exceeding the predetermined voltage, and returning to step (b). - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A charger for charging a battery, comprising:
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a charging module for charging the battery with a constant charging power; a detecting module for detecting a battery voltage; and a control module for receiving signals from the detecting module and controlling the charging module, the control module comprising; a timing unit for timing; and a computing unit for computing data, wherein the control module is operable to control the charging module to charge the battery with the constant charging power until the battery voltage reaches a predetermined voltage, to charge the battery with a charging current for a predetermined charging time, wherein the charging current is less than a charging current used during the charging with the constant charging power, wherein the charging time for the first time is a predetermined first value, and the charging time after the first time is a changing value determined by a battery capacity, and wherein the charging is ended if the charging time is less than a predetermined second value; and wherein the control module is operable to control the charging module to determine if the battery voltage of less than the predetermined voltage;
if yes, returning to the previous step;
if no, charging the battery until the battery voltage reaches an actual voltage threshold that exceeds the predetermined voltage, and returning to the previous step. - View Dependent Claims (9)
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Specification