Back to results
US 11,381,102 B2Granted
Charging management circuit, terminal and charging method
AssigneeGuangdong Oppo Mobile Telecommunications Corp., Ltd.
InventorChen Tian
Life of this patent
Estimating the term…
Abstract
A charging management circuit, a terminal and a charging method are provided. The charging management circuit includes: a first output end, configured to output constant current to a cell, for performing constant current charging on the cell; a second output end, configured to supply power to a load in a constant current charging process; and a control circuit, configured to stop the constant current charging when a voltage across both ends of the cell reaches a constant current charging cut-off voltage of the constant current charging, wherein the constant current charging cut-off voltage is greater than a rated voltage of the cell, and is configured such that an actual voltage of the cell is not overvoltage in the constant current charging process.
Claims18
A charging management circuit, comprising:
- a first output end, configured to, in a second constant current charging stage of a constant current charging process, output constant current to a cell, for performing constant current charging on the cell through a normal charging channel between the first output end and the cell, wherein the constant current charging process further comprises a first constant current charging stage, wherein in the first constant current charging stage, a fast charging channel between a power supply device and the cell is configured to perform constant current charging on the cell before performing the constant current charging on the cell via the normal charging channel, wherein the fast charging channel is capable of performing direct charging on the cell by using an input current provided by the power supply device, and wherein a charging current of the constant current charging on the fast charging channel is greater than a charging current of the constant current charging on the normal charging channel;
- a second output end, configured to supply power to a load during the constant current charging;
- and
- a control circuit, configured to stop the constant current charging when a voltage across both ends of the cell reaches a constant current charging cut-off voltage of the constant current charging, wherein the constant current charging cut-off voltage is greater than a rated voltage of the cell, and is configured such that an actual voltage of the cell is not overvoltage in the constant current charging.
1 more element
A terminal, comprising:
- a cell;
- a load;
- a charging management circuit, comprising:
- a first output end, configured to, in a second constant current charging stage of a constant current charging process, output constant current to the cell, for performing constant current charging on the cell through a normal charging channel between the first output end and the cell;
- a second output end, configured to supply power to the load during the constant current charging;
- and
- a control circuit, configured to stop the constant current charging when a voltage across both ends of the cell reaches a constant current charging cut-off voltage of the constant current charging, wherein the constant current charging cut-off voltage is greater than a rated voltage of the cell, and is configured such that an actual voltage of the cell is not overvoltage in the constant current charging;
- and
- a fast charging channel,
- wherein the constant current charging process further comprises a first constant current charging stage, wherein in the first constant current charging stage, a fast charging channel between a power supply device and the cell is configured to perform constant current charging on the cell before performing the constant current charging on the cell via the normal charging channel, wherein the fast charging channel is capable of performing direct charging on the cell by using an input current provided by the power supply device, and wherein a charging current of the constant current charging on the fast charging channel is greater than a charging current of the constant current charging on the normal charging channel.
7 more elements
A charging method, comprising:
- in a second constant current charging stage of a constant current charging process, performing constant current charging on a cell through a normal charging channel between a first output end of a charging management circuit and the cell, wherein the constant current charging process further comprises a first constant current charging stage;
- supplying power to a load without drawing the power from a current entering into the cell;
- stopping the constant current charging when a voltage across both ends of the cell reaches a constant current charging cut-off voltage of the constant current charging, wherein the constant current charging cut-off voltage is greater than a rated voltage of the cell, and is configured such that an actual voltage of the cell is not overvoltage in the constant current charging;
- and
- in the first constant current charging stage, performing constant current charging on the cell via a fast charging channel between a power supply device and the cell before performing the constant current charging on the cell via the normal charging channel, wherein the fast charging channel is capable of performing direct charging on the cell by using an input current provided by the power supply device, and wherein a charging current of the constant current charging on the fast charging channel is greater than a charging current of the constant current charging on the normal charging channel.
2 more elements
Dependencies are inferred from the claim text.