# US 12,218,318 B2 · Method and device for charging battery

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 12,218,318 B2
- Document ID: US12218318B2
- Status: Granted
- Kind: B2
- Application number: 18/227,074
- Filed: 2023-07-27
- Published: 2023-11-16
- Granted: 2025-02-04
- Earliest claimed: 2017-02-07
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Jin Seok Hong; Jeong Kuk Shon; Young-Gyoon Ryu
- Web page: https://patentgrep.com/patent/US12218318B2

## CPC

- H01M 10/44: Methods for charging or discharging (circuits for charging H02J7/00)
- G01R 31/388: involving voltage measurements
- H01M 10/48: Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte (constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569)
- H02J 7/92: with prioritisation of loads or sources
- H02J 7/94: in response to battery current
- H02J 7/963: {in response to battery voltage gradient}
- H02J 7/82: Control of state of charge [SOC]
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- G01R: MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES (indicating correct tuning of resonant circuits H03J3/12)
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

A method for charging a battery includes: determining a first charging section, in which a current charging rate of the battery is located, from among a plurality of charging sections predetermined based on a functional relation between a state of charge of the battery and an open circuit voltage of an anode of the battery; and charging the battery for the first charging section with a first charging rate corresponding to the first charging section.

## Claims

### Claim 1

A method for charging a battery, the method comprising:
monitoring a state of the battery;
determining, based on the monitored state of the battery, a current charging stage among a plurality of charging stages to which both a multi-stage constant current charging scheme and a single stage constant voltage charging scheme are applied, wherein the plurality of charging stages is consecutive stages in which the battery is charged with different constant charging rates, respectively;
charging the battery during the current charging stage with a current charging rate corresponding to the current charging stage; and
charging the battery during a next charging stage with a next charging rate corresponding to the next charging stage based on a potential difference between a potential of an anode of the battery and a potential of an electrolytes solution of the battery in the current charging stage being determined to be equal to or less than a predetermined value.

### Claim 2 (depends on 1)

The method of claim 1, wherein the next charging rate is less than the current charging rate.

### Claim 3 (depends on 1)

The method of claim 1, wherein
the current charging rate corresponding to the current charging stage is determined so as to maintain the potential difference between the potential of the anode of the battery and the potential of the electrolyte solution of the battery to be greater than zero in the current charging stage.

### Claim 4 (depends on 1)

The method of claim 1, wherein the predetermined value is 2×10-6 volt.

### Claim 5 (depends on 1)

The method of claim 1, further comprising:
monitoring whether a charging voltage of the battery has reached a predetermined voltage value when determined charging stage of the battery is a last charging stage among the plurality of charging stages; and
applying a predetermined constant charging voltage to the battery when the charging voltage is determined to be equal to the predetermined voltage value.

### Claim 6 (depends on 1)

The method of claim 1, wherein the plurality of charging stages is determined based on a window with a predetermined height applied with reference to a minimum or a maximum of a differential graph of a functional relation of an open circuit voltage of an anode material of the battery with respect to a state of charge, and
the predetermined height is predetermined according to complexity of a charging process.

### Claim 7 (depends on 6)

The method of claim 6, wherein
as the predetermined height increases, a width of the window increases to increase respective lengths of the plurality of charging stages, and
as the predetermined height decreases, the width of the window reduces to reduce the respective lengths of the plurality of charging stages.

### Claim 8 (depends on 6)

The method of claim 6, wherein
as the predetermined height increases, a width of the window increases to reduce a number of the plurality of charging stages, and
as the predetermined height increases, the width of the window reduces to increase the number of the plurality of charging stages.

### Claim 9

A device for charging a battery comprising:
a processor;
a memory connected to the processor; and
a charging interface connected to the battery,
wherein the processor performs a program stored in the memory to perform:
monitoring a state of the battery;
determining, based on the monitored state of the battery, a first charging stage among a plurality of charging stages to which both a multi-stage constant current charging scheme and a single stage constant voltage charging scheme are applied, wherein the plurality charging stages are consecutive stages in which the battery is charged with different constant charging rates, respectively;
charging the battery during the first charging stage with a first charging rate corresponding to the first charging stage; and
charging the battery during a second charging stage with a second charging rate corresponding to the second charging stage based on a potential difference between a potential of an anode of the battery and a potential of an electrolytes solution of the battery in the first charging stage being determined to be equal to or less than a predetermined value.

### Claim 10 (depends on 9)

The device of claim 9, wherein the second charging rate is less than the first charging rate.

### Claim 11 (depends on 9)

The device of claim 9, wherein
the first charging rate corresponding to the first charging stage and the second charging rate corresponding to the second charging stage are determined so as to maintain the potential difference between the potential of the anode of the battery and the potential of the electrolyte solution of the battery to be greater than zero in the first charging stage.

### Claim 12 (depends on 9)

The device of claim 9, wherein the predetermined value is 2×10-6 volt.

### Claim 13 (depends on 9)

The device of claim 9, wherein
the processor performs the program stored in the memory to further perform:
monitoring whether a charging voltage of the battery has reached a predetermined voltage value when determined charging stage of the battery is a last charging stage among the plurality of charging stages; and
applying a predetermined constant charging voltage to the battery when the charging voltage is determined to be equal to the predetermined voltage value.

### Claim 14 (depends on 9)

The device of claim 9, wherein
the plurality of charging stages is determined based on a window with a predetermined height applied with reference to a minimum or a maximum of a differential graph of a functional relation of an open circuit voltage of an anode material of the battery with respect to a state of charge, and
the predetermined height is predetermined according to complexity of a charging process.

### Claim 15 (depends on 14)

The device of claim 14, wherein
as the predetermined height increases, a width of the window increases to increase respective lengths of the plurality of charging stages, and
as the predetermined height decreases, the width of the window reduces to reduce the respective lengths of the plurality of charging stages.

### Claim 16 (depends on 14)

The device of claim 14, wherein
as the predetermined height increases, a width of the window increases to reduce a number of the plurality of charging stages, and
as the predetermined height decreases, the width of the window reduces to increase the number of the plurality of charging stages.