Battery charge circuit with multi-charge stage and method thereof
First Claim
1. A charge method for charging at least one battery, the method comprising steps of:
- in a first charge stage, applying a first charge power having a first charge current in pulse form with a first frequency and a first charge voltage to charge the at least one battery, wherein the first charge current in the first charge stage remains substantially constant, the first charge voltage remains a fist constant voltage;
in a second charge stage following the first charge stage, applying a second power having a second charge current in pulse form with the first frequency and a second charge voltage to charge the at least one battery, wherein the second charge current in the second charge stage decreases gradually, the charge voltage remains the fist constant voltage; and
in a third charge stage following the second charge stage, applying a third charge power having a third charge current in pulse form with the first frequency and a third charge voltage to charge the at least one battery, wherein the third current in the third charge stage decreases gradually, the third charge voltage remains a second constant voltage is higher than the first constant voltage in the second charge stage; and
in a fourth charge stage following the third charge stage, applying a fourth charge power having a fourth charge current in pulse form with the first frequency and a fourth charge voltage to charge the at least one battery, wherein the fourth current in the fourth charge stage decreases gradually, the fourth charge voltage remains a second constant voltage is higher than the first constant voltage in the second charge stage.
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Abstract
A charge method for charging a battery is provided. The method involves, in a first charge stage, applying a first charge power having a first charge current in pulse form with a first frequency and a first charge voltage to charge the battery; in a second charge stage following the first charge stage, applying a second power having a second charge current in pulse form with the first frequency and a second charge voltage to charge the battery; in a third charge stage following the second charge stage, applying a third charge power having a third charge current in pulse form with the first frequency and a third charge voltage to charge the battery; in a fourth charge stage following the third charge stage, applying a fourth charge power having a fourth charge current in pulse form with the first frequency and a fourth charge voltage to charge the battery.
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Citations
29 Claims
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1. A charge method for charging at least one battery, the method comprising steps of:
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in a first charge stage, applying a first charge power having a first charge current in pulse form with a first frequency and a first charge voltage to charge the at least one battery, wherein the first charge current in the first charge stage remains substantially constant, the first charge voltage remains a fist constant voltage;
in a second charge stage following the first charge stage, applying a second power having a second charge current in pulse form with the first frequency and a second charge voltage to charge the at least one battery, wherein the second charge current in the second charge stage decreases gradually, the charge voltage remains the fist constant voltage; and
in a third charge stage following the second charge stage, applying a third charge power having a third charge current in pulse form with the first frequency and a third charge voltage to charge the at least one battery, wherein the third current in the third charge stage decreases gradually, the third charge voltage remains a second constant voltage is higher than the first constant voltage in the second charge stage; and
in a fourth charge stage following the third charge stage, applying a fourth charge power having a fourth charge current in pulse form with the first frequency and a fourth charge voltage to charge the at least one battery, wherein the fourth current in the fourth charge stage decreases gradually, the fourth charge voltage remains a second constant voltage is higher than the first constant voltage in the second charge stage. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A charge method for charging at least one battery, the method comprising steps of:
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in a first charge stage, applying a first charge power having a first charge current in pulse form with a first frequency and a first charge voltage to charge the at least one battery, wherein the first charge current in the first charge stage remains substantially constant, the first charge voltage remains a fist constant voltage;
in a second charge stage following the first charge stage, applying a second power having a second charge current in pulse form with the first frequency and a second charge voltage to charge the at least one battery, wherein the second charge current in the second charge stage decreases gradually, the charge voltage remains the fist constant voltage; and
in a third charge stage following the second charge stage, applying a third charge power having a third charge current in pulse form with the first frequency and a third charge voltage to charge the at least one battery, wherein the third current in the third charge stage decreases gradually, the third charge voltage remains a second constant voltage is higher than the first constant voltage in the second charge stage;
in a fourth charge stage following the third charge stage, applying a fourth charge power having a fourth charge current in pulse form with the first frequency and a fourth charge voltage to charge the at least one battery, wherein the fourth current in the fourth charge stage decreases gradually, the fourth charge voltage remains a second constant voltage is higher than the first constant voltage in the second charge stage; and
in a maintenance stage following the fourth charge stage, applying a fifth current maintain the battery until the battery is substantially full charged. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A charge method for charging at least one battery, the method comprising steps of:
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in a first charge stage, applying a first charge power having a first charge current with a first frequency and a first charge voltage to charge the at least one battery, wherein the first charge current in the first charge stage remains substantially constant, the first charge voltage remains a fist constant voltage;
in a second charge stage following the first charge stage, applying a second power having a second charge current with the first frequency and a second charge voltage to charge the at least one battery, wherein the second charge current in the second charge stage decreases gradually, the charge voltage remains the fist constant voltage;
after the second charge stage, applying a variant current with a second frequency, wherein the charge voltage in this stage varies with the second frequency;
in a third charge stage following the second charge stage, applying a third charge power having a third charge current with the first frequency and a third charge voltage to charge the at least one battery, wherein the third current in the third charge stage decreases gradually, the third charge voltage remains a second constant voltage is higher than the first constant voltage in the second charge stage; and
in a fourth charge stage following the third charge stage, applying a fourth charge power having a fourth charge current with the first frequency and a fourth charge voltage to charge the at least one battery, wherein the fourth current in the fourth charge stage decreases gradually, the fourth charge voltage remains a second constant voltage is higher than the first constant voltage in the second charge stage. - View Dependent Claims (17, 18, 19, 20)
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21. A charge method for charging at least one battery, the method comprising steps of:
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in a first charge stage, applying a first charge power having a first charge current with a first frequency and a first charge voltage to charge the at least one battery, wherein the first charge current in the first charge stage remains substantially constant, the first charge voltage remains a fist constant voltage;
in a second charge stage following the first charge stage, applying a second power having a second charge current with the first frequency and a second charge voltage to charge the at least one battery, wherein the second charge current in the second charge stage decreases gradually, the charge voltage remains the fist constant voltage; and
in a third charge stage following the second charge stage, applying a third charge power having a third charge current with the first frequency and a third charge voltage to charge the at least one battery, wherein the third current in the third charge stage decreases gradually, the third charge voltage remains a second constant voltage is higher than the first constant voltage in the second charge stage;
in a fourth charge stage following the third charge stage, applying a fourth charge power having a fourth charge current with the first frequency and a fourth charge voltage to charge the at least one battery, wherein the fourth current in the fourth charge stage decreases gradually, the fourth charge voltage remains a second constant voltage is higher than the first constant voltage in the second charge stage; and
in a maintenance stage following the fourth charge stage, applying a fifth current maintain the battery until the battery is substantially full charged. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29)
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Specification