BATTERY CELL CHARACTERISTIC IDENTIFICATION

• US 20160003911A1
• Filed: 07/03/2014
• Published: 01/07/2016
• Est. Priority Date: 07/03/2014
• Status: Abandoned Application

• Current Assignee: Infineon Technologies AG
• Original Assignee: Infineon Technologies AG
• Inventors: Lim, Cheow Guan, Zhang, Chunyan, Wee, Tue Fatt David, Rozario, Robert P., Lim, Tse Siang Gary
• Application Number:
  US14/323,307
• Publication Number:
  US 20160003911A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01R 31/382 Arrangements for monitoring battery or accumulator variables, e.g. SoC
• CPC Class Codes: G01R 31/392 Determining battery ageing or deterioration, e.g. state of health
• CPC Class Codes: G01R 31/396 Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery

Abstract

Devices, systems, and methods for battery monitoring are disclosed. An example method performs a first measurement on a battery cell installed in a location to determine a first charging capacity and determines a set of values for a permitted charging capacity trace region based on the first charging capacity and a number of charge/discharge cycles subsequent to performing the first measurement. The example method performs a second measurement on a battery cell installed in the location to determine a second charging capacity and compares the second charging capacity to the permitted charging capacity trace region and determines that the battery cell installed in the location at a time of the second measurement is not the same battery cell installed in the location at the time of the first measurement when the second charging capacity is not a value within the set of permitted values of the charging capacity trace region.

Claims

1. A method of battery monitoring comprising:

performing a first measurement on a battery cell installed in a location to determine a first charging capacity;

determining a set of values for a permitted charging capacity trace region based on the first charging capacity and a number of charge/discharge cycles subsequent to performing the first measurement;

performing a second measurement on a battery cell installed in the location to determine a second charging capacity;

comparing the second charging capacity to the permitted charging capacity trace region; and

determining that the battery cell installed in the location at a time of the second measurement is the same battery cell installed in the location at the time of the first measurement when the second charging capacity is a value within the set of values for a permitted charging capacity trace region and that the battery cell installed in the location at a time of the second measurement is not the same battery cell installed in the location at the time of the first measurement when the second charging capacity is not a value within the set of values for a permitted charging capacity trace region.

2. The method of claim 1, further comprising performing an authentication upon determining that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement to authenticate that the battery cell installed in the location at the time of the second measurement is a battery authorized by the manufacturer to be installed in the location.

3. The method of claim 1, reset battery monitoring circuitry upon determining that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement.

4. The method of claim 3, wherein resetting the battery monitoring circuitry only occurs when the battery cell installed in the location at the time of the second measurement is a battery authorized by the manufacturer to be installed in the location.

5. The method of claim 1, further comprising notifying a user based on the determination that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement.

6. The method of claim 1, further comprising disabling a mobile device in which the battery that is being monitored is installed based on the determination that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement.

7. The method of claim 1, further comprising sending a message to a service center based on the determination that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement.

8. The method of claim 1, further comprising setting a flag based on the determination that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement, the method further comprising setting a limit to battery cell charging, battery cell discharging, or both, based on the determination that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement.

9. The method of claim 1, further comprising saving an indication in a memory upon determining that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement.

10. A device for battery monitoring comprising:

a battery monitoring circuitry;

a memory;

a processor, coupled to the memory and configured to;

perform a first measurement on a battery cell installed in a location to determine a first charging capacity;

determine a set of values for a permitted charging capacity trace region based on the first charging capacity and a number of charge/discharge cycles subsequent to performing the first measurement;

perform a second measurement on a battery cell installed in the location to determine a second charging capacity;

compare the second charging capacity to the permitted charging capacity trace region; and

determine that the battery cell installed in the location at a time of the second measurement is the same battery cell installed in the location at the time of the first measurement when the second charging capacity is a value within the set of values for a permitted charging capacity trace region and that the battery cell installed in the location at a time of the second measurement is not the same battery cell installed in the location at the time of the first measurement when the second charging capacity is not a value within the set of values for a permitted charging capacity trace region.

11. The device of claim 10, wherein the processor is further configured to perform an authentication upon determining that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement to authenticate that the battery cell installed in the location at the time of the second measurement is a battery authorized by the manufacturer to be installed in the location.

12. The device of claim 10, wherein the processor is further configured to reset battery monitoring circuitry upon determining that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement.

13. The device of claim 12, wherein the device resets the battery monitoring circuitry only when the battery cell installed in the location at the time of the second measurement is a battery authorized by the manufacturer to be installed in the location.

14. The device of claim 10, wherein the processor is further configured to notify a user based on the determination that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement.

15. The device of claim 10, wherein the processor is further configured to disable a mobile device in which the battery that is being monitored is installed based on the determination that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement.

16. The device of claim 10, wherein the processor is further configured to send a message to a service center based on the determination that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement.

17. The device of claim 10, wherein the processor is further configured to set a flag based on the determination that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement, and the processor is further configured to set a limit to battery cell charging, battery cell discharging, or both, based on the determination that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement.

18. The device of claim 10, wherein the processor is further configured to save an indication in the memory upon determining that the battery cell installed in the location at the time of the second measurement is not the same battery cell installed in the location at the time of the first measurement.

19. The device of claim 10, wherein the battery monitoring circuitry is part of a battery system and on a circuit board including at least one battery cell or wherein the battery monitoring circuitry is on a circuit board separate from the circuit board including the at least one battery cell.

20. A device for battery monitoring comprising:

means for performing a first measurement on a battery cell installed in a location to determine a first charging capacity;

means for determining a set of values for a permitted charging capacity trace region based on the first charging capacity and a number of charge/discharge cycles subsequent to performing the first measurement;

means for performing a second measurement on a battery cell installed in the location to determine a second charging capacity;

means for comparing the second charging capacity to the permitted charging capacity trace region; and

means for determining that the battery cell installed in the location at a time of the second measurement is the same battery cell installed in the location at the time of the first measurement when the second charging capacity is a value within the set of values for a permitted charging capacity trace region and that the battery cell installed in the location at a time of the second measurement is not the same battery cell installed in the location at the time of the first measurement when the second charging capacity is not a value within the set of values for a permitted charging capacity trace region.