METHOD FOR CHARGING BATTERY MODULE IN MULTIPLE STAGES
First Claim
1. A method for charging a battery module of a portable electronic apparatus in multiple stages, suitable for the battery module comprising a plurality of parallely-connected battery cell sets, the method comprising:
- a. charging the battery module with a first predetermined current via constant current charging;
b. determining whether or not voltage of any parallely-connected battery cell set in the battery module reaches a first predetermined voltage;
c. charging the battery module with a second predetermined current via the constant current charging, wherein the second predetermined current equals to the first predetermined current minus a current difference value;
d. determining whether or not the voltage of any parallely-connected battery cell set in the battery module reaches a second predetermined voltage;
e. maintaining the battery module to be charged with the second predetermined voltage via constant voltage charging;
f. determining whether or not the battery module is fulfilled; and
g. maintaining the battery module to be charged with the second predetermined voltage via the constant voltage charging until the battery module is fulfilled.
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Accused Products
Abstract
A method for charging a battery module including a plurality of parallelly-connected battery cell sets in multiple stages is provided. In the present invention, a constant current charging is applied for charging the battery module in an initial stage of charging through the method of voltage control or current control. Then, the charging current is lowered substantially to reduce the charging speed when the voltage of one of the battery cell sets exceeds a safety value or a total voltage of the battery module itself reaches a rated voltage. Accordingly, a safety problem of the battery can be avoided and battery life can be prolonged.
21 Citations
21 Claims
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1. A method for charging a battery module of a portable electronic apparatus in multiple stages, suitable for the battery module comprising a plurality of parallely-connected battery cell sets, the method comprising:
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a. charging the battery module with a first predetermined current via constant current charging; b. determining whether or not voltage of any parallely-connected battery cell set in the battery module reaches a first predetermined voltage; c. charging the battery module with a second predetermined current via the constant current charging, wherein the second predetermined current equals to the first predetermined current minus a current difference value; d. determining whether or not the voltage of any parallely-connected battery cell set in the battery module reaches a second predetermined voltage; e. maintaining the battery module to be charged with the second predetermined voltage via constant voltage charging; f. determining whether or not the battery module is fulfilled; and g. maintaining the battery module to be charged with the second predetermined voltage via the constant voltage charging until the battery module is fulfilled. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for charging a battery module of a portable electronic apparatus in multiple stages, suitable for the battery module, the method comprising:
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a. charging the battery module with a first predetermined current via constant current charging; b. determining whether or not the voltage of the battery module reaches a first predetermined voltage; c. charging the battery module with a second predetermined current via the constant current charging, wherein the second predetermined current equals to the first predetermined current minus a current difference value; d. determining whether or not voltage of the battery module reaches a second predetermined voltage; e. maintaining the battery module to be charged with the second predetermined voltage via constant voltage charging; f. determining whether or not the battery module is fulfilled; and g. maintaining the battery module to be charged with the second predetermined voltage via the constant voltage charging until the battery module is fulfilled. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification