Method and Terminal for Displaying Battery Power

• US 20150100261A1
• Filed: 12/15/2014
• Published: 04/09/2015
• Est. Priority Date: 12/28/2012
• Status: Active Grant

• Current Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Device Company Limited (Huawei Investment & Holding Co., Ltd.)
• Inventors: Wang, Guanglin
• Granted Patent: US 10,345,382 B2
• Time in Patent Office: Days
• US Class Current: 702/63
• CPC Class Codes: G01R 31/3646 for indicating electrical conditions or variables, e.g. visual or audible indicators
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/371 with remote indication, e.g. on external chargers
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: G01R 31/3842 combining voltage and current measurements

Abstract

A method and a related terminal for displaying battery power to improve accuracy of displaying battery power. The method includes acquiring a power increase of a battery according to a preset time interval when the battery enters a charging state, where the battery has completed discharging before entering the charging state, acquiring power stored in the battery and an open circuit voltage OCV of the battery at a time when the acquired power increase of the battery reaches a preset threshold, generating an Open Circuit Voltage-State Of Capacity (OCV-SOC) curve according to the acquired power stored in the battery and the acquired OCV when the battery completes charging, and displaying the battery power according to the generated OCV-SOC curve.

Claims

1. A method for displaying battery power, comprising:

acquiring a power increase of a battery according to a preset time interval when the battery enters a charging state, wherein the battery has completed discharging before entering the charging state;

acquiring power stored in the battery and an open circuit voltage (OCV) of the battery at a time when the acquired power increase of the battery reaches a preset threshold;

generating an Open Circuit Voltage-State Of Capacity (OCV-SOC) curve according to the acquired power stored in the battery and an acquired OCV when the battery completes charging; and

displaying the battery power according to the generated OCV-SOC curve.

2. The method according to claim 1, wherein the acquiring power stored in the battery and an open circuit voltage (OCV) of the battery at a time when the acquired power increase of the battery reaches a preset threshold comprises:

detecting a voltage and a current of the battery at the time when the acquired power increase of the battery reaches the preset threshold;

accumulating the power increase of the battery to obtain the power stored in the battery at the time; and

calculating the OCV of the battery at the time according to the voltage and the current of the battery.

3. The method according to claim 1, wherein the generating an Open Circuit Voltage-State Of Capacity (OCV-SOC) curve according to the acquired power stored in the battery and the acquired OCV comprises:

calculating a total capacity of the battery in a current situation according to the power stored in the battery;

dividing the total capacity of the battery into multiple power levels; and

establishing a mapping relationship between each power level and an OCV that is separately corresponding to each power level to generate the OCV-SOC curve.

4. The method according to claim 1, wherein the method further comprises displaying the battery power by using an OCV-SOC curve saved in a terminal to which the battery belongs when charging is interrupted in midway after the battery enters the charging state or if charging time exceeds a charging time limit.

5. The method according to claim 1, wherein the method further comprises:

acquiring a temperature parameter of the battery when the battery is in a charging process; and

after generating the OCV-SOC curve according to the acquired power stored in the battery and the acquired OCV, using the generated OCV-SOC curve to replace an OCV-SOC curve that is saved in a terminal to which the battery belongs and corresponding to the temperature parameter.

6. A terminal for displaying battery power, comprising:

a first acquiring unit configured to acquire a power increase of a battery according to a preset time interval when the battery enters a charging state, wherein the battery has completed discharging before entering the charging state;

a second acquiring unit configured to acquire power stored in the battery and an open circuit voltage (OCV) at a time when the power increase of the battery acquired by the first acquiring unit reaches a preset threshold;

a generating unit configured to, when the battery completes charging, generate an Open Circuit Voltage-State Of Capacity (OCV-SOC) curve according to the power stored in the battery and the OCV that are acquired by the second acquiring unit; and

a displaying unit configured to display the battery power according to the OCV-SOC curve generated by the generating unit.

7. The terminal according to claim 6, wherein the second acquiring unit comprises:

a detecting subunit configured to detect a voltage and a current of the battery at the time when the acquired power increase of the battery reaches the preset threshold;

a first calculating subunit configured to accumulate the power increase of the battery acquired by the first acquiring unit to obtain the power stored in the battery at the time; and

a second calculating subunit configured to calculate the OCV of the battery at the time according to the voltage and the current of the battery that are detected by the detecting subunit.

8. The terminal according to claim 6, wherein the generating unit comprises:

a third calculating subunit configured to calculate a total capacity of the battery in a current situation according to the power stored in the battery;

a dividing subunit configured to divide the total capacity of the battery that is calculated by the third calculating subunit into multiple power levels; and

a mapping subunit configured to establish a mapping relationship between each power level obtained by means of division by the dividing subunit and an OCV that is separately corresponding to each power level to generate the OCV-SOC curve.

9. The terminal according to claim 6, wherein the displaying unit is further configured to display the battery power by using the OCV-SOC curve saved in a terminal to which the battery belongs when charging is interrupted in midway after the battery enters the charging state or if charging time exceeds a charging time limit.

10. The terminal according to claim 6, wherein the terminal further comprises:

an acquiring unit configured to acquire a temperature parameter of the battery when the battery is in a charging process; and

a replacing unit configured to use the OCV-SOC curve generated by the generating unit to replace the OCV-SOC curve that is saved in a terminal to which the battery belongs and corresponding to the temperature parameter.