Battery with an integrated voltage converter having a bypass circuit

• US 8,115,454 B2
• Filed: 11/14/2007
• Issued: 02/14/2012
• Est. Priority Date: 03/26/2007
• Status: Expired due to Fees

• Current Assignee: Duracell U.S. Operations, Inc. (Berkshire Hathaway Incorporated)
• Original Assignee: Gillette Company (The Procter & Gamble Company)
• Inventors: Cintra, George M., Nanjundaswamy, Kirakodu S., Kaplan, Alexander, Batson, David C., DeMuth, David Leigh, Pinnell, Leslie J., Kressmann, Frank, Riemer, Joern, Faranda, Leo
• Primary Examiner(s): Tso, Edward
• Assistant Examiner(s): PIGGUSH, AARON C
• Application Number:
  US11/939,664
• Publication Number:
  US 20080238372A1
• Time in Patent Office: 1,553 Days
• Field of Search: 320/137, 320/140, 320/143, 320/163, 320/107
• US Class Current: 320/140
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/058 Construction or manufacture
• CPC Class Codes: H01M 10/0587 of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
• CPC Class Codes: H01M 10/4257 Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
• CPC Class Codes: H01M 10/44 Methods for charging or discharging circuits for charging H02J7/00
• CPC Class Codes: H01M 4/5825 Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

Disclosed is a battery having an internally integrated voltage converter module. The battery includes at least one electrochemical cell having an internal bore, a voltage converter module electrically coupled to the at least one electrochemical cell and disposed within a portion of the internal bore, the voltage converter configured to convert a first voltage produced by the at least one electrochemical cell into a second, different voltage, a set of terminals being electrically coupled to the voltage converter, and a bypass circuit coupled between one of the terminals of the set of terminals and the at least one electrochemical cell to direct charging current applied from an external source to the at least one electrochemical cell.

Claims

1. A battery comprising:

at least one rechargeable electrochemical cell having an internal bore extending longitudinally through the electrochemical cell, with the electrochemical cell having an anode and a cathode;

a voltage converter module electrically coupled to the at least one electrochemical cell and disposed within a portion of the internal bore, the voltage converter configured to convert a first voltage produced by the at least one electrochemical cell into a second, different voltage;

a first set of terminals to electrically couple inputs of the voltage converter to the anode and cathode of the electrochemical cell;

a second, different set of terminals to electrically couple outputs of the voltage converter to external terminals of the battery; and

a bypass circuit coupled between one of the terminals of each of the first and second sets of terminals to bypass the voltage converter module during charging of the electrochemical cell to direct charging current applied from an external source to the at least one electrochemical cell.

2. The battery of claim 1 wherein the bypass circuit is configured to direct substantially all of the applied charging current to the anode and cathode.

3. The battery of claim 1 wherein the bypass circuit includes a diode connected between the one of the terminals of each of the first and second sets of terminals.

4. The battery of claim 3 wherein the diode is one of:

a zener diode and a Schottky diode.

5. The battery of claim 1 wherein the voltage converter module includes an integrated circuit configured to become disabled when the charging current is applied to the second set of terminals.

6. The battery of claim 5, further comprising a circuit configured to generate a signal to cause the integrated circuit to become disabled.

7. The battery of claim 1 wherein the at least one electrochemical cell is configured to be charged to a charge level of at least 90% capacity of the at least one electrochemical cell in fifteen minutes or less.

8. The battery of claim 1 wherein the at least one electrochemical cell includes a lithium-iron-phosphate cell.

9. The battery of claim 1 wherein the voltage converter module comprises:

an electronic switching device; and

a controller electrically coupled to the electronic switching device, the controller configured to control the electronic switching device to cause one of;

a voltage step-down conversion operation and a voltage step-up conversion operation.

10. A battery comprising:

at least one electrochemical jelly-roll type cell having an anode and a cathode, the jelly-roll type cell having an internal longitudinal bore extending between anode and cathode;

a voltage converter module disposed within the internal bore of the jelly-roll type cell, the voltage converter configured to convert a first voltage produced by the at least one electrochemical cell into a second, different voltage;

a battery case that houses the at least one electrochemical cell and the voltage converter;

a first set of terminals to electrically couple inputs of the voltage converter to the anode and cathode of the electrochemical cell;

a second, different set of terminals to couple outputs of the voltage converter to external terminals of the battery; and

a bypass circuit coupled between one of the terminals of each of the first and second sets of terminals to bypass the voltage converter module and to direct charging current applied from an external source to the at least one electrochemical cell.

11. The battery of claim 10 wherein the bypass circuit is configured to direct substantially all the applied charging current to the anode and cathode.

12. The battery of claim 10 wherein the bypass circuit includes a diode connected between the one of the terminals of each of the first and second sets of terminals.

13. The battery of claim 12 wherein the diode is one of:

a zener diode and a Schottky diode.

14. The battery of claim 10 wherein the voltage converter module includes an integrated circuit configured to become disabled when the charging current is applied to the second set of terminals.

15. The battery of claim 14, further comprising a circuit configured to generate a signal to cause the integrated circuit to become disabled.

16. The battery of claim 10 wherein the at least one electrochemical cell is configured to be charged to a charge level of at least 90% capacity of the at least one electrochemical cell in fifteen minutes or less.

17. The battery of claim 10 wherein the at least one electrochemical cell includes a lithium-iron-phosphate cell.

18. The battery of claim 10 wherein the voltage converter module comprises:

an electronic switching device; and

a controller electrically coupled to the electronic switching device, the controller configured to control the electronic switching device to cause one of;

a voltage step-down conversion operation and a voltage step-up conversion operation.