Method and apparatus for auditing a battery test

• US 6,051,976 A
• Filed: 07/29/1996
• Issued: 04/18/2000
• Est. Priority Date: 07/29/1996
• Status: Expired due to Term

• Current Assignee: Midtronics Incorporated
• Original Assignee: Midtronics Incorporated
• Inventors: Bertness, Kevin I.
• Primary Examiner(s): REGAN, MAURA K
• Application Number:
  US08/681,730
• Time in Patent Office: 1,359 Days
• Field of Search: 324/426, 324/427, 324/429, 324/433, 340/636
• US Class Current: 324/426
• 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 31/374 with means for correcting the measurement for temperature or ageing
• CPC Class Codes: G01R 31/3835 involving only voltage measurements
• CPC Class Codes: G01R 31/386 using test-loads
• CPC Class Codes: G01R 31/389 Measuring internal impedance, internal conductance or related variables

Abstract

A method and apparatus for auditing condition of a storage battery performs a battery test on the storage battery to obtain a test result. Test condition information is obtained related to conditions of the battery test. The battery test result and the test condition information is combined into a code. The code may be subsequently used to determine conditions during the battery test which lead to the particular test result.

Claims

1. A method of monitoring a condition of a storage battery, comprising:

connecting a battery test device to the storage battery;

obtaining test condition information related to the battery;

obtaining raw battery test data by performing a step in a battery test on the storage battery with the battery test device;

digitizing the raw test data with the battery test device;

determining, using a microprocessor in the battery test device, the condition of the battery as a function of the digitized raw test data and the test condition information;

providing a visual output indicative of the condition of the battery;

digitally combining the test condition information, the digitized raw test data and the condition of the battery to form an audit code, the audit code having properties such that the digitized raw test data and the condition of the battery are subsequently recovered from the audit code and the battery test subsequently audited through comparing the raw test data to the condition of the battery to identify user falsification of the battery test; and

outputting the audit code.

2. The method of claim 1 wherein the raw test data includes battery conductance.

3. The method of claim 1 wherein the test condition information includes temperature information.

4. The method of claim 1 wherein the test condition information includes rated battery Cold Cranking Amps (CCA).

5. The method of claim 1 wherein the test condition information is related to a vehicle which contains the battery.

6. The method of claim 1 wherein the test condition information includes information related to the battery.

7. The method of claim 1 wherein the raw test data includes battery voltage.

8. The method of claim 1 wherein the step of obtaining the raw battery test data includes applying an electrical load to the battery.

9. The method of claim 1 wherein the audit code comprises an alpha numeric code.

10. The method of claim 1 including the step of placing the audit code onto the battery following the step of outputting the audit code.

11. The method of claim 1 including subsequently auditing the battery test based upon the audit code.

12. The method of claim 11 wherein the step of subsequently auditing comprises:

extracting the raw test data, the test condition information and the battery condition from the battery;

calculating on the battery condition as a function of the extracted raw test data and the extracted test condition information; and

comparing the extracted battery condition with the calculated battery condition.

23. The method of claim 1 wherein the test condition information comprises battery type.

24. The method of claim 1 wherein the test condition information comprises geographic location.

25. The method of claim 1 wherein the test condition information comprises time information.

26. The method of claim 1 wherein the test condition information comprises the name of the operator.

27. The method of claim 1 wherein the test condition information comprises the VIN code of a vehicle which contains the battery.

28. The method of claim 1 wherein the test condition information comprises battery specific information.

29. The method of claim 1 wherein the test condition information comprises battery serial number.

30. The method of claim 1 wherein the test condition information comprises battery model.

31. The method of claim 1 wherein the test condition information comprises date of manufacture of the battery.

32. The method of claim 1 wherein the test condition information comprises a digital signature.

33. The method of claim 1 wherein the step of outputting comprises printing an audit code.

34. The method of claim 1 wherein the step of printing the audit code comprises printing a label.

35. The method of claim 1 wherein the step of printing the audit code comprises printing a bar code.

36. The method of claim 1 wherein the step of outputting comprises transmitting the audit code data.

37. The method of claim 1 wherein the step of transmitting the audit code data comprises transmitting data through a modem.

38. The method of claim 1 wherein the step of determining the condition of the battery comprises determining battery capacity.

39. The method of claim 1 wherein the step of determining the condition of the battery comprises determining state of charge.

40. The method of claim 1 wherein the step of obtaining raw battery test data comprises performing a resistance test.

41. The method of claim 1 wherein the step of obtaining raw battery test data comprises an impedance test.

53. The apparatus of claim 5 wherein the data transmission circuit comprises a modem.

13. An apparatus for performing a battery test on a storage battery to determine the condition of the storage battery, comprising:

battery test circuitry obtaining raw test data for the battery;

an analog to digital converter providing digitized raw test data;

input circuitry adapted to receive test condition information related to a test condition of the storage battery;

a microprocessor determining the battery condition of the storage battery as a function of the digitized raw test data and the test condition information, wherein the microprocessor includes calculation circuitry for providing an audit code which is a combination of the battery condition, the digitized raw test data, and the test condition information, the audit code having properties such that the battery condition, the digitized raw test data, and the test condition information is subsequently recovered from the audit code and the battery test subsequently audited through comparing the raw test data to the condition of the battery to identify user falsification of the battery test; and

output circuitry outputting the final battery test result and separately outputting the audit code.

14. The apparatus of claim 13 wherein the battery test circuitry includes circuitry determining battery conductance.

15. The apparatus of claim 13 wherein the battery test circuitry includes circuitry applying an electrical load to the battery.

16. The apparatus of claim 13 wherein the raw test data comprises battery voltage.

17. The apparatus of claim 13 wherein test condition information includes information related to battery temperature.

18. The apparatus of claim 13 wherein test condition information includes information related to geographic location.

19. The apparatus of claim 13 wherein test condition information includes information related to a vehicle containing the battery.

20. The apparatus of claim 13 wherein test condition information includes information related to the battery.

21. The apparatus of claim 13 wherein the input circuitry includes a manual input for receiving an input from a user.

22. The apparatus of claim 20 wherein information related to the battery comprises rated battery Cold Cranking Amps (CCA).

42. The apparatus of claim 20 wherein the information related to the battery comprises battery type.

43. The apparatus of claim 20 wherein the information related to the battery comprises battery serial number.

44. The apparatus of claim 20 wherein the information related to the battery comprises battery model.

45. The apparatus of claim 20 wherein the information related to the battery comprises date of the manufacture of the battery.

46. The apparatus of claim 19 wherein the information related to the vehicle comprises the vehicle VIN code.

47. The apparatus of claim 13 wherein the test condition information includes geographic location.

48. The apparatus of claim 13 wherein the test condition information includes time information.

49. The apparatus of claim 13 wherein the test condition information includes the name of the operator.

50. The apparatus of claim 13 wherein the test condition information includes a digital signature.

51. The apparatus of claim 13 wherein the output circuitry comprises a printer output.

52. The apparatus of claim 13 wherein the output circuitry comprises a data transmission circuit.

54. The apparatus of claim 13 wherein the battery test circuitry includes a circuitry determining battery impedance.