# US 11,444,477 B2 · Constant power charging method and device for mobile terminal

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- Number: US 11,444,477 B2
- Document ID: US11444477B2
- Status: Granted
- Kind: B2
- Application number: 16/698,032
- Filed: 2019-11-27
- Published: 2021-03-04
- Granted: 2022-09-13
- Earliest claimed: 2019-08-30
- Assignees: Beijing Xiaomi Mobile Software Co., Ltd.
- Applicants: Beijing Xiaomi Mobile Software Co., Ltd.
- Inventors: Changyu Sun; Yanteng Wang
- Web page: https://patentgrep.com/patent/US11444477B2

## CPC

- H02J 7/92: with prioritisation of loads or sources
- H02J 1/04: Current-controlled supply systems, e.g. constant-current supply systems
- H02J 7/90: Regulation of charging or discharging current or voltage
- H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00)
- H02J 7/40: characterised by the exchange of charge or discharge related data
- H02J 7/42: with electronic devices having internal batteries, e.g. mobile phones
- H02J 7/933: {the cycle being controlled or terminated in response to electric parameters}
- Y02E 60/10: Energy storage using batteries
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A charging method for a mobile terminal includes charging a rechargeable battery of the mobile terminal with a constant power, which further includes: charging the rechargeable battery of the mobile terminal with a first constant power determined based on an average charging power supported by the mobile terminal, when a maximum output power of a charger is greater than or equal to the average charging power supported by the mobile terminal; and charging the rechargeable battery of the mobile terminal with a second constant power determined based on the maximum output power of the charger, when the maximum output power of the charger is less than the average charging power supported by the mobile terminal.

## Claims

### Claim 1

A charging method for a mobile terminal, comprising:
charging a rechargeable battery of the mobile terminal with a constant power,
wherein the charging a rechargeable battery of the mobile terminal with a constant power comprises:
charging the rechargeable battery of the mobile terminal with a first constant power determined based on an average charging power supported by the mobile terminal, when a maximum output power of a charger is greater than or equal to the average charging power supported by the mobile terminal, wherein the first constant power is equal to or smaller than the average charging power supported by the mobile terminal; and
charging the rechargeable battery of the mobile terminal with a second constant power determined based on the maximum output power of the charger, when the maximum output power of the charger is less than the average charging power supported by the mobile terminal.

### Claim 2 (depends on 1)

The charging method according to claim 1, wherein the charging a rechargeable battery of the mobile terminal with a constant power comprises:
charging the rechargeable battery of the mobile terminal in such a manner that a charging voltage is increased gradually and a charging current is reduced gradually,
wherein a product of the charging voltage and the charging current at a same time is a constant value or in a constant range.

### Claim 3 (depends on 1)

The charging method according to claim 1, wherein the charging a rechargeable battery of the mobile terminal with a constant power comprises:
charging the rechargeable battery of the mobile terminal with the constant power during a target time period of a charging process,
wherein the target time period is any one of a time period for replacing a constant-current charging stage, a time period before the constant-current charging stage, and a time period after the constant-current charging stage.

### Claim 4 (depends on 1)

A charging adapter, comprising a charging circuit, wherein the charging circuit is configured to implement the charging method for the mobile terminal according to claim 1.

### Claim 5 (depends on 1)

A non-transitory computer-readable storage medium having computer programs stored thereon, wherein when the computer programs are executed by a processor, the processor is caused to implement the charging method for the mobile terminal according to claim 1.

### Claim 6

A mobile terminal, comprising:
a processor and a memory,
wherein the memory stores computer programs, and the processor is configured to execute the computer programs to cause charging a rechargeable battery of the mobile terminal with a constant power,
wherein the charging a rechargeable battery of the mobile terminal with a constant power comprises:
charging the rechargeable battery of the mobile terminal with a first constant power determined based on an average charging power supported by the mobile terminal, when a maximum output power of a charger is greater than or equal to the average charging power supported by the mobile terminal, wherein the first constant power is equal to or smaller than the average charging power supported by the mobile terminal; and
charging the rechargeable battery of the mobile terminal with a second constant power determined based on the maximum output power of the charger, when the maximum output power of the charger is less than the average charging power supported by the mobile terminal.

### Claim 7 (depends on 6)

The mobile terminal according to claim 6, wherein the charging a rechargeable battery of the mobile terminal with a constant power comprises:
charging the rechargeable battery of the mobile terminal in such a manner that a charging voltage is increased gradually and a charging current is reduced gradually,
wherein a product of the charging voltage and the charging current at a same time is a constant value or in a constant range.

### Claim 8 (depends on 6)

The mobile terminal according to claim 6, wherein the charging a rechargeable battery of the mobile terminal with a constant power comprises:
charging the rechargeable battery of the mobile terminal with the constant power during a target time period of a charging process,
wherein the target time period is any one of a time period for replacing a constant-current charging stage, a time period before the constant-current charging stage, and a time period after the constant-current charging stage.

### Claim 9

A chip, comprising:
a programmable logic circuit and program instructions, wherein the chip is configured to, when operating, cause charging a rechargeable battery of a mobile terminal with a constant power,
wherein the charging a rechargeable battery of the mobile terminal with a constant power comprises:
charging the rechargeable battery of the mobile terminal with a first constant power determined based on an average charging power supported by the mobile terminal, when a maximum output power of a charger is greater than or equal to the average charging power supported by the mobile terminal, wherein the first constant power is equal to or smaller than the average charging power supported by the mobile terminal; and
charging the rechargeable battery of the mobile terminal with a second constant power determined based on the maximum output power of the charger, when the maximum output power of the charger is less than the average charging power supported by the mobile terminal.

### Claim 10 (depends on 9)

The chip according to claim 9, wherein the charging a rechargeable battery of a mobile terminal with a constant power comprises:
charging the rechargeable battery of the mobile terminal in such a manner that a charging voltage is increased gradually and a charging current is reduced gradually,
wherein a product of the charging voltage and the charging current at a same time is a constant value or in a constant range.

### Claim 11 (depends on 9)

The chip according to claim 9, wherein the charging a rechargeable battery of a mobile terminal with a constant power comprises:
charging the rechargeable battery of the mobile terminal with the constant power during a target time period of a charging process,
wherein the target time period is any one of a time period for replacing a constant-current charging stage, a time period before the constant-current charging stage, and a time period after the constant-current charging stage.