BATTERY CELL FUEL GAUGE FOR PACKAGED BATTERIES AND ASSOCIATED SYSTEMS AND METHODS

• US 20090208818A1
• Filed: 02/13/2009
• Published: 08/20/2009
• Est. Priority Date: 02/14/2008
• Status: Abandoned Application

• Current Assignee: Micro Power Electronics, Inc. (Electrochem Solutions, Inc.)
• Original Assignee: Micro Power Electronics, Inc. (Electrochem Solutions, Inc.)
• Inventors: Poff, Spencer
• Application Number:
  US12/371,418
• Publication Number:
  US 20090208818A1
• Time in Patent Office: Days
• US Class Current: 429/50
• CPC Class Codes: H01M 10/482 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 50/569 Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals battery terminal connectors with integrated measuring arrangements G01R31/364
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The present disclosure is directed generally to battery cell fuel gauges for packaged batteries and associated systems and methods. A method in accordance with one embodiment includes detecting one or more parameters corresponding to one or more battery cells that are disposed within a casing of a battery packet with a fuel gauge that is also disposed within the casing and that is electrically coupled to a data connector that is accessible from outside the casing. The method can further include formatting the detected one or more parameters into a data file that is readable with non-proprietary hardware and/or software, e.g., via a USB cable. The data file is stored at the fuel gauge. The method can still further include providing a host device with access to the data file via the data connector.

Claims

1. A battery pack comprising:

a casing;

at least one battery cell disposed within the casing;

a universal serial bus (USB) receptacle accessible from an exterior surface of the casing and providing an electrical coupling to an interior portion within the casing; and

a battery cell fuel gauge disposed within the casing and coupled to the USB receptacle and the battery cell, the fuel gauge including a processor and a memory, wherein the processor is configured to;

detect at least one battery cell parameter associated with the operation of the battery cell;

generate at least one data file based on the detected battery cell parameters; and

provide the data file to a host device coupled to the USB receptacle, wherein the battery package is configured to operate as a mass storage class (MSC) device.

2. The battery pack of claim 1, wherein the battery cell parameter is one of a voltage of the battery cell, a temperature of the battery cell, a stored energy of the battery cell, and a current produced by the battery cell.

3. The battery pack of claim 1, wherein generating at least one data file comprises:

determining a file name based at least in part on the detected parameter, with the file name conveying the value of the detected parameter; and

storing the data file using the determined file name.

4. The battery pack of claim 1, wherein the processor is further configured to:

receive information from the host device specifying a sensing time interval;

wherein detecting the battery cell parameter comprises detecting instantaneous values of the battery cell parameter at times based on the specified sensing time interval.

5. A method for operating a battery cell fuel gauge, the method comprising:

detecting one or more parameters corresponding to one or more battery cells that are disposed within a casing of a battery package with a fuel gauge that is also disposed within the casing and that is electrically coupled to a data connector that is accessible from outside the casing;

formatting the detected one or more parameters into a data file that is readable with non-proprietary hardware and/or software;

storing the data file at the fuel gauge; and

providing a host device with access to the data file via the data connector.

6. The method of claim 5, wherein the data file is readable with an MSC-based USB driver.

7. The method of claim 5, wherein detecting one or more parameters comprises detecting multiple values of the one or more parameters at multiple times based on a specified time interval and wherein formatting the detected one or more parameters into a data file comprises generating a data file containing the multiple values and the associated multiple times.

8. The method of claim 5, wherein the data file is a first data file and wherein the method further comprises:

determining one or more manufacturing parameters associated with the one or more battery cells, wherein the one or more manufacturing parameters includes at least one of a model number, a serial number, a pack lot code, a manufacture date, and a battery cell type; and

formatting the one or more manufacturing parameters into a second data file;

storing the second data file at the fuel gauge; and

providing the host device with access to the second data file.

9. The method of claim 5, wherein storing the data file comprises:

determining a file name based at least in part on at least one of the detected parameters with the file name conveying the value of the at least one of the detected parameters; and

storing the data file using the determined file name.

10. The method of claim 5, further comprising:

receiving information from the host device specifying a sensing time interval;

wherein detecting one or more parameters comprises detecting instantaneous values of the one or more parameters at times based on the specified sensing time interval.

11. The method of claim 5, wherein the data connector is a serial bus connector and providing the host device with access to the data file via the data connector comprises presenting the battery package to the host device as a mass storage class (MSC) device.

12. An apparatus comprising:

at least one battery cell;

a casing housing the at least one battery cell and including an exterior surface having electrical contacts that are coupled through the casing to the at least one battery cell;

a serial bus receptacle at least partially disposed within the casing and accessible from outside the casing;

a sensing component located within the casing and configured to detect at a first time a first value of a parameter associated with the at least one battery cell, and to detect at a second time a second value of the parameter, wherein the second time occurs a specified time interval after the first time; and

a data component disposed within the casing and configured to store the first value and the second value in a data file, the data file being readable with non-proprietary hardware and/or software, and to provide the data file to a host device connected to the serial bus receptacle.

13. The apparatus of claim 12, wherein the serial bus receptacle is a universal serial bus connector and the apparatus is configured to operate as a mass storage class device.

14. The apparatus of claim 12, wherein the parameter associated with the battery cell is one of a voltage of the at least one battery cell, a temperature of the at least one battery cell, a stored energy of the at least one battery cell, or a current produced by the at least one battery cell.

15. The apparatus of claim 12, wherein the data component is further configured to receive data from the host device defining the specified time interval and wherein the data component is further configured to store the first time and the second time in the data file.

16. The apparatus of claim 12, wherein the sensing component is configured to detect multiple parameters associated with the at least one battery cell and the data component is further configured to receive data from the host device selecting an individual parameter to detect from the multiple parameters.

17. The apparatus of claim 12, wherein the data file has an associated file name based at least in part on the first value, the first time, the second value, or the second time.

18. The apparatus of claim 12, wherein the serial bus receptacle is configured to receive power from the from the host device and to provide the received power to recharge the at least one battery cells.

19. The apparatus of claim 12, wherein the data component is further configured to generate a third value of a derived parameter based on the first value and the second value and to store the third value in the data file.

20. An apparatus for operating a battery cell fuel gauge, the apparatus comprising:

one or more battery cells;

carrying means for carrying the one or more battery cells;

detecting means for detecting at least one parameter corresponding to the one or more battery cells;

formatting means for formatting the detected parameters into a data file;

storing means for storing the data file at the fuel gauge, the data file being readable with non-proprietary software and/or hardware; and

access means for providing a host device with access to the data file.

21. The apparatus of claim 20, wherein the parameter comprises at least one of a voltage of the battery cell, a temperature of the battery cell, a stored energy of the battery cell, a current produced by the battery cell, a remaining capacity, a full charge capacity, a time to empty, a time to full, a lifetime maximum temperature, a lifetime minimum temperature, a lifetime maximum current, or a lifetime minimum current.

22. The apparatus of claim 20, further comprising:

determining means for determining one or more manufacturing parameters associated with the one or more battery cells, wherein the one or more manufacturing parameters includes at least one of a model number, a serial number, a pack lot code, a manufacture date, or a battery cell type; and

wherein

the formatting means formats the one or more manufacturing parameters into a second data file;

the storing means stores the second data file at the fuel gauge; and

the access means provides the host device with access to the second data file.

23. The apparatus of claim 20, further comprising:

receiving means for receiving information from the host device specifying a sensing time interval;

wherein the detection means comprises a means for detecting instantaneous values of the at least one parameter at the specified sensing time interval.

24. The apparatus of claim 20, further comprising receiving means for receiving information from the host device that selects an individual parameter to detect from the at least one parameter.

25. The apparatus of claim 20, further comprising generation means for generating a derived parameter based on the detected at least one parameter, wherein the means for formatting is further configured to format the derived parameter into the data file.

26. The apparatus of claim 20 wherein the data file is readable with an MSC-based USB driver.