Method for accurately performing power estimation on a battery of an electronic device, and associated apparatus

• US 8,880,367 B1
• Filed: 11/10/2011
• Issued: 11/04/2014
• Est. Priority Date: 11/10/2011
• Status: Active Grant

• Current Assignee: Nanjing Silergy Semiconductor (Hong Kong) Technology Ltd.
• Original Assignee: Energy Pass Incorporation
• Inventors: Lee, Ming-Hsien, Yang, Chi-Yu
• Primary Examiner(s): Kundu, Sujoy
• Assistant Examiner(s): Lee, Paul D
• Application Number:
  US13/293,132
• Time in Patent Office: 1,090 Days
• Field of Search: 702/63
• US Class Current: 702/63
• CPC Class Codes: G01R 19/16542 for batteries charge condition monitoring in G01R31/36
• CPC Class Codes: G01R 31/3648 comprising digital calculation means, e.g. for performing an algorithm
• CPC Class Codes: G01R 31/367 Software therefor, e.g. for battery testing using modelling or look-up tables
• CPC Class Codes: G01R 31/392 Determining battery ageing or deterioration, e.g. state of health

Abstract

A method for accurately performing power estimation on a battery of an electronic device includes: monitoring a charging current of the battery to obtain charging current data of the charging current with respect to time; and performing curve mapping according to the charging current data and according to a plurality of sets of predetermined curve characteristic data, in order to determine an estimation parameter corresponding to one of a plurality of predetermined cycle counts, wherein the estimation parameter is utilized for performing power estimation, and the sets of predetermined curve characteristic data respectively correspond to the predetermined cycle counts, which represent estimated ages of the battery, respectively. At least one associated apparatus is also provided.

Claims

1. A method for accurately performing power estimation on a battery of an electronic device, the method comprising the steps of:

by utilizing a charging current monitoring module of a processing circuit of the electronic device, monitoring a charging current of the battery to obtain charging current data of the charging current with respect to time; and

by utilizing a calculation module of the processing circuit of the electronic device, performing curve mapping according to the charging current data and according to a plurality of sets of predetermined curve characteristic data, in order to determine an estimation parameter corresponding to one of a plurality of predetermined cycle counts, wherein the estimation parameter is utilized for performing power estimation, and the sets of predetermined curve characteristic data respectively correspond to the predetermined cycle counts, which represent estimated ages of the battery, respectively, wherein the step of performing curve mapping according to the charging current data and according to the plurality of sets of predetermined curve characteristic data in order to determine the estimation parameter corresponding to one of the plurality of predetermined cycle counts further comprises;

within the plurality of sets of predetermined curve characteristic data, selecting a set of predetermined curve characteristic data that matches the charging current data;

within a plurality of predetermined parameters respectively corresponding to the sets of predetermined curve characteristic data, utilizing a predetermined parameter corresponding to the selected set of predetermined curve characteristic data as the estimation parameter; and

comparing at least one curve characteristic associated to the charging current data with that associated to one set of the plurality of sets of predetermined curve characteristic data, in order to determine the selected set of predetermined curve characteristic data;

wherein the at least one curve characteristic of a curve under consideration comprises at least one curve characteristic index for the curve under consideration to fall from a first current value to a second current value; and

the curve under consideration is a curve associated to the charging current data or a curve associated to the one set of the plurality of sets of predetermined curve characteristic data.

2. The method of claim 1, wherein the at least one curve characteristic index comprises a time interval for the curve under consideration to fall from the first current value to the second current value.

3. The method of claim 1, wherein the at least one curve characteristic index comprises an area below the curve under consideration within a time interval for the curve under consideration to fall from the first current value to the second current value.

4. The method of claim 1, wherein the estimation parameter represents a maximum possible power available in the battery.

5. The method of claim 4, wherein the one of the plurality of predetermined cycle counts is a latest cycle count that represents an estimated age of the battery.

6. An apparatus for accurately performing power estimation according to the method of claim 1, the apparatus comprising at least one portion of the electronic device, the apparatus comprising:

a current detector arranged to detect a charging current of the battery;

the processing circuit arranged to control operations of the electronic device, wherein the processing circuit comprises;

a time measurement unit arranged to perform time measurement; and

a storage arranged to store information, wherein the information stored in the storage comprises the plurality of sets of predetermined curve characteristic data.

7. The apparatus of claim 6, wherein the at least one curve characteristic index comprises a time interval for the curve under consideration to fall from the first current value to the second current value.

8. The apparatus of claim 6, wherein the at least one curve characteristic index comprises an area below the curve under consideration within a time interval for the curve under consideration to fall from the first current value to the second current value.

9. The apparatus of claim 6, wherein the estimation parameter represents a maximum possible power available in the battery.

10. The apparatus of claim 9, wherein the one of the plurality of predetermined cycle counts is a latest cycle count that represents an estimated age of the battery.

11. A method for accurately performing power estimation on a battery of an electronic device, the method comprising the steps of:

by utilizing a charging current monitoring module of a processing circuit of the electronic device, monitoring a charging current of the battery to obtain charging current data of the charging current with respect to time; and

by utilizing a calculation module of the processing circuit of the electronic device, performing curve mapping according to the charging current data and according to a plurality of sets of predetermined curve characteristic data, in order to determine an estimation parameter corresponding to one of a plurality of predetermined cycle counts, wherein the estimation parameter is utilized for performing power estimation, and the sets of predetermined curve characteristic data respectively correspond to the predetermined cycle counts, which represent estimated ages of the battery, respectively, wherein the step of performing curve mapping according to the charging current data and according to the plurality of sets of predetermined curve characteristic data in order to determine the estimation parameter corresponding to one of the plurality of predetermined cycle counts further comprises;

within the plurality of sets of predetermined curve characteristic data, selecting a set of predetermined curve characteristic data that matches the charging current data;

within a plurality of predetermined parameters respectively corresponding to the sets of predetermined curve characteristic data, utilizing a predetermined parameter corresponding to the selected set of predetermined curve characteristic data as the estimation parameter; and

within the plurality of predetermined parameters respectively corresponding to the sets of predetermined curve characteristic data, determining the predetermined parameter according to a predetermined table, wherein contents of the predetermined table comprise the sets of predetermined curve characteristic data;

wherein the contents of the predetermined table comprise curve characteristic index values, each of which represents a curve characteristic index for a curve under consideration to fall from a first current value to a second current value; and

the curve under consideration is a curve associated to one set of the plurality of sets of predetermined curve characteristic data.

12. The method of claim 11, wherein the curve characteristic index values comprise time interval values, each of which represents a time interval for the curve under consideration to fall from the first current value to the second current value.

13. The method of claim 11, wherein the curve characteristic index values comprise area values, each of which represents an area below the curve under consideration within a time interval for the curve under consideration to fall from the first current value to the second current value.

14. An apparatus for accurately performing power estimation according to the method of claim 11, the apparatus comprising at least one portion of the electronic device, the apparatus comprising:

a current detector arranged to detect a charging current of the battery;

the processing circuit, arranged to control operations of the electronic device, wherein the processing circuit comprises;

a time measurement unit arranged to perform time measurement; and

a storage arranged to store information, wherein the information stored in the storage comprises the plurality of sets of predetermined curve characteristic data, wherein the information stored in the storage comprises the predetermined table.

15. The apparatus of claim 14, wherein the curve characteristic index values comprise time interval values, each of which represents a time interval for the curve under consideration to fall from the first current value to the second current value.

16. The apparatus of claim 14, wherein the curve characteristic index values comprise area values, each of which represents an area below the curve under consideration within a time interval for the curve under consideration to fall from the first current value to the second current value.

17. An apparatus for accurately performing power estimation on a battery of an electronic device, the apparatus comprising at least one portion of the electronic device, the apparatus comprising:

a voltage detector arranged to detect a charging voltage of the battery;

a processing circuit arranged to control operations of the electronic device, wherein the processing circuit comprises;

a time measurement unit arranged to perform time measurement;

a charging voltage monitoring module arranged to monitor the charging voltage of the battery to obtain charging voltage data of the charging voltage with respect to time; and

a calculation module arranged to perform curve mapping according to the charging voltage data and according to a plurality of sets of predetermined curve characteristic data, in order to determine an estimation parameter corresponding to one of a plurality of predetermined cycle counts, wherein the estimation parameter is utilized for performing power estimation, and the sets of predetermined curve characteristic data respectively correspond to the predetermined cycle counts, which represent estimated ages of the battery, respectively, wherein within the plurality of sets of predetermined curve characteristic data, the calculation module selects a set of predetermined curve characteristic data that matches the charging voltage data, and within a plurality of predetermined parameters respectively corresponding to the sets of predetermined curve characteristic data, the calculation module utilizes a predetermined parameter corresponding to the selected set of predetermined curve characteristic data as the estimation parameter, wherein the calculation module compares at least one curve characteristic associated to the charging voltage data with that associated to one set of the plurality of sets of predetermined curve characteristic data, in order to determine the selected set of predetermined curve characteristic data; and

a storage arranged to store information, wherein the information stored in the storage comprises the plurality of sets of predetermined curve characteristic data;

wherein the at least one curve characteristic of a curve under consideration comprises at least one curve characteristic index for the curve under consideration to fall from a first value to a second value; and

the curve under consideration is a curve associated to the charging voltage data or a curve associated to the one set of the plurality of sets of predetermined curve characteristic data.