Anomaly detection method of battery pack, battery pack and electronic apparatus

• US 20070052424A1
• Filed: 12/30/2005
• Published: 03/08/2007
• Est. Priority Date: 09/06/2005
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Okumura, Masafumi
• Application Number:
  US11/320,938
• Publication Number:
  US 20070052424A1
• Time in Patent Office: Days
• US Class Current: 324/432
• CPC Class Codes: G01R 31/389 Measuring internal impedance, internal conductance or related variables
• 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: Y02E 60/10 Energy storage using batteries

Abstract

A structure of detecting an anomaly of the battery pack (2) including a plurality of battery cells (41a, 41b, 42a, 42b, 43a, 43b) connected in series or in parallel, which detects whether or not an impedance of at least one of battery cells deviates from a stipulated range. Also, a structure to detect whether or not an impedance change of at least one of battery cells exceeds a stipulated range.

Claims

1. An anomaly detection method of a battery pack with a plurality of battery cells connected in series or in parallel, comprising the step of:

detecting whether or not for an impedance of at least one of said battery cells to deviate from a stipulated range.

3. The anomaly detection method of a battery pack of claim 1, further comprising the step of:

measuring an impedance of said battery cell.

4. The anomaly detection method of a battery pack of claim 1, further comprising the step of:

measuring or predicting an impedance of said battery cell on the basis of current fluctuation amount of charging current of said battery cell and the corresponding voltage fluctuation amount of said battery cell.

5. The anomaly detection method of a battery pack of claim 1, further comprising the step of:

measuring or predicting an impedance of said battery cell on the basis of current fluctuation amount of discharging current of said battery cell and the corresponding voltage fluctuation amount of said battery cell.

2. An anomaly detection method of a battery pack with a plurality of battery cells connected in series or in parallel, comprising the step of:

detecting whether or not for an impedance change of at least one of said battery cells to exceed a stipulated range.

6. The anomaly detection method of a battery pack of claim 2, further comprising the step of:

measuring an impedance of said battery cell.

7. The anomaly detection method of a battery pack of claim 2, further comprising the step of:

measuring or predicting an impedance of said battery cell on the basis of current fluctuation amount of charging current of said battery cell and the corresponding voltage fluctuation amount of said battery cell.

8. The anomaly detection method of a battery pack of claim 2, further comprising the step of:

measuring or predicting an impedance of said battery cell on the basis of current fluctuation amount of discharging current of said battery cell and the corresponding voltage fluctuation amount of said battery cell.

9. A battery pack with a plurality of battery cells connected in series or in parallel, comprising:

a detection part detecting whether or not for an impedance of at least one of said battery cells to deviate from a stipulated range.

11. The battery pack of claim 9, further comprising:

a measurement part measuring an impedance of said battery cell.

12. The battery pack of claim 9, further comprising:

a processing part calculating or predicting an impedance of said battery cell on the basis of current fluctuation amount of charging current of said battery cell and the corresponding voltage fluctuation amount of said battery cell.

13. The battery pack of claim 9, further comprising:

a processing part calculating or predicting an impedance of said battery cell on the basis of current fluctuation amount of discharging current of said battery cell and the corresponding voltage fluctuation amount of said battery cell.

14. The battery pack of claim 9, said battery pack prohibiting either or both of charging and discharging of said battery cell on the basis of a detection result by said detection part.

10. A battery pack with a plurality of battery cells connected in series or in parallel, comprising:

a detection part detecting whether or not for an impedance change of at least one of said battery cells to exceed a stipulated range.

15. The battery pack of claim 10, further comprising:

a measurement part measuring an impedance of said battery cell.

16. The battery pack of claim 10, further comprising:

a processing part calculating or predicting an impedance of said battery cell on the basis of current fluctuation amount of charging current of said battery cell and the corresponding voltage fluctuation amount of said battery cell.

17. The battery pack of claim 10, further comprising:

a processing part calculating or predicting an impedance of said battery cell on the basis of current fluctuation amount of discharging current of said battery cell and the corresponding voltage fluctuation amount of said battery cell.

18. The battery pack of claim 10, said battery pack prohibiting either or both of charging and discharging of said battery cell on the basis of a detection result by said detection part.

19. An electronic apparatus connected to a battery pack with a plurality of battery cells connected in series or in parallel, comprising:

a detection part detecting whether or not for an impedance of at least one of said battery cells to deviate from a stipulated range.

21. The electronic apparatus of claim 19, further comprising:

a measurement part measuring an impedance of each said battery cell of said battery pack.

22. The electronic apparatus of claim 19, further comprising:

a processing part calculating or predicting an impedance of said battery cell on the basis of current fluctuation amount of charging current of said battery cell and the corresponding voltage fluctuation amount of said battery cell.

23. The electronic apparatus of claim 19, further comprising:

a processing part calculating or predicting an impedance of said battery cell on the basis of current fluctuation amount of discharging current of said battery cell and the corresponding voltage fluctuation amount of said battery cell.

24. The electronic apparatus of claim 19, said electronic apparatus prohibiting either or both of charging and discharging of said battery cell on the basis of a detection result by said detection part.

25. The electronic apparatus of claim 19, further comprising:

a receiving part receiving a data measured by said battery pack, corresponding to a transmitting part transmitting said data.

20. An electronic apparatus connected to a battery pack with a plurality of battery cells connected in series or in parallel, comprising:

a detection part detecting whether or not for an impedance change of at least one of said battery cells to exceed a stipulated range.

26. The electronic apparatus of claim 20, further comprising:

a measurement part measuring an impedance of each said battery cell of said battery pack.

27. The electronic apparatus of claim 20, further comprising:

a processing part calculating or predicting an impedance of said battery cell on the basis of current fluctuation amount of charging current of said battery cell and the corresponding voltage fluctuation amount of said battery cell.

28. The electronic apparatus of claim 20, further comprising:

a processing part calculating or predicting an impedance of said battery cell on the basis of current fluctuation amount of discharging current of said battery cell and the corresponding voltage fluctuation amount of said battery cell.

29. The electronic apparatus of claim 20, said electronic apparatus prohibiting either or both of charging and discharging of said battery cell on the basis of a detection result by said detection part.

30. The electronic apparatus of claim 20, further comprising:

a receiving part receiving a data measured by said battery pack, corresponding to a transmitting part transmitting said data.