Multi-cell voltage secure data encoding in hybrid vehicles

• US 8,581,751 B2
• Filed: 06/05/2012
• Issued: 11/12/2013
• Est. Priority Date: 11/06/2007
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: GM Global Technology Operations LLC (General Motors Company)
• Inventors: Katrak, Kerfegar K., Leutheuser, Andrew H., Martin, Scott A.
• Primary Examiner(s): Shriver, II, J. Allen
• Assistant Examiner(s): Gurari, Erez
• Application Number:
  US13/489,279
• Publication Number:
  US 20120245793A1
• Time in Patent Office: 525 Days
• Field of Search: 341/50, 341/51
• US Class Current: 341/50
• CPC Class Codes: B60L 58/21 having the same nominal voltage
• 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
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

Methods and systems are provided for encoding vehicle data comprising a first voltage pertaining to a first battery cell and a second voltage pertaining to a second battery cell is provided. A determination is made as to whether the first voltage is valid. In addition, a determination is made as to whether the second voltage is valid. One of a plurality of values is assigned to a validity measure based at least in part on whether the first voltage or the second voltage, or both, are valid. The plurality of values, in binary form, are at least two bit errors removed from one another.

Claims

1. A method of encoding vehicle data comprising a first voltage pertaining to a first battery cell and a second voltage pertaining to a second battery cell, the method comprising the steps of:

determining whether the first voltage is valid;

determining whether the second voltage is valid; and

assigning one of a plurality of values to a validity measure based at least in part on whether the first voltage or the second voltage, or both, are valid;

wherein the plurality of values, in binary form, are at least two bit errors removed from one another.

2. The method of claim 1, further comprising the step of:

generating a message comprising the first voltage, the second voltage, and the validity measure.

3. The method of claim 2, further comprising the step of:

transmitting the message.

4. The method of claim 1, wherein the vehicle data further comprises a third voltage pertaining to a third battery cell, and the step of assigning one of the plurality of values to the validity measure comprises the steps of:

assigning a first value of the plurality of values to the validity measure if the first voltage, the second voltage, and the third voltage each are valid;

assigning a second value of the plurality of values to the validity measure if the first voltage and the second voltage each are valid and the third voltage is invalid;

assigning a third value of the plurality of values to the validity measure if the first voltage and the third voltage each are valid and the second voltage is invalid;

assigning a fourth value of the plurality of values to the validity measure if the second voltage and the third voltage each are valid and the first voltage is invalid;

assigning a fifth value of the plurality of values to the validity measure if the second voltage and the third voltage each are invalid and the first voltage is valid;

assigning sixth value of the plurality of values to the validity measure if the first voltage and the third voltage each are invalid and the second voltage is valid;

assigning a seventh value of the plurality of values to the validity measure if the first voltage and the second voltage each are invalid and the third voltage is valid; and

assigning an eighth value of the plurality of values to the validity measure if the first voltage, the second voltage, and the third voltage each are invalid;

wherein the first value, the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, and the eighth value of the plurality of values each are, in binary form, at least two bit errors removed from one another.

5. The method of claim 1, further comprising the steps of:

determining whether the first voltage is current;

determining whether the second voltage is current; and

assigning one of a second plurality of values to an update measure based at least in part on whether the first voltage or the second voltage, or both, are current;

wherein the second plurality of values, in binary form, are at least two bit errors removed from one another.

6. The method of claim 5, wherein the vehicle data further comprises a third voltage pertaining to a third battery cell, and the step of assigning one of the second plurality of values to the update measure comprises the steps of:

assigning a first value of the second plurality of values to the update measure if the first voltage is current, the second voltage is current, and the third voltage of the voltage group is current;

assigning a second value of the second plurality of values to the update measure if the first voltage is current, the second voltage is current, and the third voltage is not current;

assigning a third value of the second plurality of values to the update measure if the first voltage is current, the second voltage is not current, and the third voltage is current;

assigning a fourth value of the second plurality of values to the update measure if the first voltage is not current, the second voltage is current, and the third voltage is current;

assigning a fifth value of the second plurality of values to the update measure if the first voltage is current, the second voltage is not current, and the third voltage is not current;

assigning a sixth value of the second plurality of values to the update measure if the first voltage is not current, the second voltage is not current, and the third voltage is current;

assigning a seventh value of the second plurality of values to the update measure if the first voltage is not current, the second voltage is current, and the third voltage is not current; and

assigning an eighth value of the second plurality of values to the update measure if the first voltage is not current, the second voltage is not current, and the third voltage is not current;

wherein the first value, the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, and the eighth value of the second plurality of values each are, in binary form, at least two bit errors removed from one another.

7. The method of claim 6, further comprising the step of:

generating a message comprising the first voltage, the second voltage, the third voltage, the validity measure, and the update measure.

8. A program product for encoding vehicle data comprising a first voltage pertaining to a first battery cell and a second voltage pertaining to a second battery cell, the program product comprising:

a program configured to at least facilitate;

determining whether the first voltage is valid;

determining whether the second voltage is valid; and

assigning one of a plurality of values to a validity measure based at least in part on whether the first voltage or the second voltage, or both, are valid, wherein the plurality of values, in binary form, are at least two bit errors removed from one another; and

a non-transitory, computer-readable storage medium storing the program.

9. The program product of claim 8, wherein the program is further configured to at least facilitate:

generating a message comprising the first voltage, the second voltage, and the validity measure.

10. The program product of claim 8, wherein the vehicle data further comprises a third voltage pertaining to a third battery cell, and wherein the program is further configured to at least facilitate:

assigning a first value of the plurality of values to the validity measure if the first voltage, the second voltage, and the third voltage each are valid;

assigning a second value of the plurality of values to the validity measure if the first voltage and the second voltage each are valid and the third voltage is invalid;

assigning a third value of the plurality of values to the validity measure if the first voltage and the third voltage each are valid and the second voltage is invalid;

assigning a fourth value of the plurality of values to the validity measure if the second voltage and the third voltage each are valid and the first voltage is invalid;

assigning a fifth value of the plurality of values to the validity measure if the second voltage and the third voltage each are invalid and the first voltage is valid;

assigning sixth value of the plurality of values to the validity measure if the first voltage and the third voltage each are invalid and the second voltage is valid;

assigning a seventh value of the plurality of values to the validity measure if the first voltage and the second voltage each are invalid and the third voltage is valid; and

assigning an eighth value of the plurality of values to the validity measure if the first voltage, the second voltage, and the third voltage each are invalid;

wherein the first value, the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, and the eighth value of the plurality of values each are, in binary form, at least two bit errors removed from one another.

11. The program product of claim 8, wherein the program is further configured to at least facilitate:

determining whether the first voltage is current;

determining whether the second voltage is current; and

assigning one of a second plurality of values to an update measure based at least in part on whether the first voltage or the second voltage, or both, are current;

wherein the second plurality of values, in binary form, are at least two bit errors removed from one another.

12. The program product of claim 11, wherein the vehicle data further comprises a third voltage pertaining to a third battery cell, and the program is further configured to at least facilitate:

assigning a first value of the second plurality of values to the update measure if the first voltage is current, the second voltage is current, and the third voltage of the voltage group is current;

assigning a second value of the second plurality of values to the update measure if the first voltage is current, the second voltage is current, and the third voltage is not current;

assigning a third value of the second plurality of values to the update measure if the first voltage is current, the second voltage is not current, and the third voltage is current;

assigning a fourth value of the second plurality of values to the update measure if the first voltage is not current, the second voltage is current, and the third voltage is current;

assigning a fifth value of the second plurality of values to the update measure if the first voltage is current, the second voltage is not current, and the third voltage is not current;

assigning a sixth value of the second plurality of values to the update measure if the first voltage is not current, the second voltage is not current, and the third voltage is current;

assigning a seventh value of the second plurality of values to the update measure if the first voltage is not current, the second voltage is current, and the third voltage is not current; and

assigning an eighth value of the second plurality of values to the update measure if the first voltage is not current, the second voltage is not current, and the third voltage is not current;

wherein the first value, the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, and the eighth value of the second plurality of values each are, in binary form, at least two bit errors removed from one another.

13. The program product of claim 12, wherein the program is further configured to at least facilitate:

generating a message comprising the first voltage, the second voltage, the third voltage, the validity measure, and the update measure.

14. A system for encoding vehicle data comprising a first voltage pertaining to a first battery cell and a second voltage pertaining to a second battery cell, the system comprising:

a measurement unit configured to obtain the first voltage and the second voltage; and

a processor coupled to the measurement unit and configured to at least facilitate;

determining whether the first voltage is valid;

determining whether the second voltage is valid; and

assigning one of a plurality of values to a validity measure based at least in part on whether the first voltage or the second voltage, or both, are valid, wherein the plurality of values, in binary form, are at least two bit errors removed from one another.

15. The system of claim 14, wherein the processor is further configured to at least facilitate:

generating a message comprising the first voltage, the second voltage, and the validity measure.

16. The system of claim 14, wherein the processor is further configured to at least facilitate:

transmitting the message.

17. The system of claim 14, wherein:

the vehicle data further comprises a third voltage pertaining to a third battery cell;

the measurement unit is configured to obtain the third voltage; and

the processor is further configured to at least facilitate;

assigning a first value of the plurality of values to the validity measure if the first voltage, the second voltage, and the third voltage each are valid;

assigning a second value of the plurality of values to the validity measure if the first voltage and the second voltage each are valid and the third voltage is invalid;

assigning a third value of the plurality of values to the validity measure if the first voltage and the third voltage each are valid and the second voltage is invalid;

assigning a fourth value of the plurality of values to the validity measure if the second voltage and the third voltage each are valid and the first voltage is invalid;

assigning a fifth value of the plurality of values to the validity measure if the second voltage and the third voltage each are invalid and the first voltage is valid;

assigning sixth value of the plurality of values to the validity measure if the first voltage and the third voltage each are invalid and the second voltage is valid;

assigning a seventh value of the plurality of values to the validity measure if the first voltage and the second voltage each are invalid and the third voltage is valid; and

assigning an eighth value of the plurality of values to the validity measure if the first voltage, the second voltage, and the third voltage each are invalid;

wherein the first value, the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, and the eighth value of the plurality of values each are, in binary form, at least two bit errors removed from one another.

18. The system of claim 14, wherein the processor is further configured to at least facilitate:

determining whether the first voltage is current;

determining whether the second voltage is current; and

assigning one of a second plurality of values to an update measure based at least in part on whether the first voltage or the second voltage, or both, are current;

wherein the second plurality of values, in binary form, are at least two bit errors removed from one another.

19. The system of claim 18, wherein:

the vehicle data further comprises a third voltage pertaining to a third battery cell;

the measurement unit is configured to obtain the third voltage; and

the processor is further configured to at least facilitate;

assigning a first value of the second plurality of values to the update measure if the first voltage is current, the second voltage is current, and the third voltage of the voltage group is current;

assigning a second value of the second plurality of values to the update measure if the first voltage is current, the second voltage is current, and the third voltage is not current;

assigning a third value of the second plurality of values to the update measure if the first voltage is current, the second voltage is not current, and the third voltage is current;

assigning a fourth value of the second plurality of values to the update measure if the first voltage is not current, the second voltage is current, and the third voltage is current;

assigning a fifth value of the second plurality of values to the update measure if the first voltage is current, the second voltage is not current, and the third voltage is not current;

assigning a sixth value of the second plurality of values to the update measure if the first voltage is not current, the second voltage is not current, and the third voltage is current;

assigning a seventh value of the second plurality of values to the update measure if the first voltage is not current, the second voltage is current, and the third voltage is not current; and

assigning an eighth value of the second plurality of values to the update measure if the first voltage is not current, the second voltage is not current, and the third voltage is not current;

wherein the first value, the second value, the third value, the fourth value, the fifth value, the sixth value, the seventh value, and the eighth value of the second plurality of values each are, in binary form, at least two bit errors removed from one another.

20. The system of claim 19, wherein the processor is further configured to at least facilitate:

generating a message comprising the first voltage, the second voltage, the third voltage, the validity measure, and the update measure.