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US 11,539,229 B2Granted
Multi-stage constant current charging method and charging apparatus
AssigneeGuangdong Oppo Mobile Telecommunications Corp., Ltd.
InventorsJun Zhang, Chunying Qu
Life of this patent
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Abstract
Provided are a multi-stage constant current charging method and a charging apparatus. The multi-stage constant current charging method includes the following. Perform a multi-stage constant-current charging on a battery, where a constant-current charging cut-off voltage is larger than a second voltage. Perform a constant-voltage charging on the battery, where a constant-voltage charging cut-off current is larger than a second current.
Claims20
A charging method, comprising:
- performing a constant-current charging of a battery, wherein the constant-current charging comprises a plurality of charging stages, wherein:
- each of the plurality of charging stages corresponds to a charging current, and for any two adjacent charging stages, a charging current corresponding to a former charging stage is larger than a charging current corresponding to a later charging stage;
- and
- in each of the plurality of charging stages, apply a charging current corresponding to the charging stage to the battery until a voltage of the battery reaches a first voltage, wherein the first voltage is larger than a second voltage, wherein the second voltage is a standard constant-current charging cut-off voltage of the battery;
- and
- performing a constant-voltage charging of the battery until a charging current of the battery reaches a first current, wherein the first current is larger than a second current, wherein the second current is a standard constant-voltage charging cut-off current of the battery.
3 more elements
A charging apparatus comprising:
- a power supply circuit configured to provide a charging power;
- a charging control circuit configured to:
- perform a constant-current charging of a battery according to the charging power provided by the power supply circuit, wherein the constant-current charging comprises a plurality of charging stages, wherein each of the plurality of charging stages corresponds to a charging current, and for any two adjacent charging stages, a charging current corresponding to a former charging stage is larger than a charging current corresponding to a later charging stage;
- in each of the plurality of charging stages, apply a charging current corresponding to the charging stage to the battery until a voltage across the battery reaches a first voltage, wherein the first voltage is larger than a second voltage, wherein the second voltage is a standard constant-current charging cut-off voltage of the battery;
- and
- perform a constant-voltage charging of the battery according to the charging power provided by the power supply circuit until a charging current of the battery reaches to a first current, wherein the first current is larger than a second current, wherein the second current is a standard constant-voltage charging cut-off current of the battery.
3 more elements
Dependencies are inferred from the claim text.