Battery having user charge capacity control

• US 6,342,774 B1
• Filed: 03/27/2001
• Issued: 01/29/2002
• Est. Priority Date: 03/27/2001
• Status: Active Grant

• Current Assignee: Amperex Technology Limited (TDK Corporation)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Howard, Jason Newton, Kreisinger, Robert Daniel
• Primary Examiner(s): TOATLEY, GREGORY J
• Application Number:
  US09/818,014
• Time in Patent Office: 308 Days
• Field of Search: 320/107, 320/125, 320/162, 429/61
• US Class Current: 320/107
• 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 10/42 Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells H01M10/60 takes precedence
• CPC Class Codes: H01M 10/425 Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing printed circuits H05K1/00
• CPC Class Codes: Y02E 10/50 Photovoltaic [PV] energy
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A rechargeable battery having a user-selected charge capacity whereby a user of the battery can select the voltage at which the battery is charged, and thus can control the capacity of the battery. The battery has a rigid casing with an exterior surface thereof, and a rechargeable electrochemical cell within the casing. A plurality of charge contacts are accessible at the exterior surface of the casing and are in conductive contact with the electrochemical cell to allow charging of the electrochemical cell when a current is placed across the charge contacts. The battery also has a charge control circuit in conductive contact with at least the charge contacts and the electrochemical cell, and the control circuit includes a voltage regulator that regulates the charge voltage from the charge contacts to the electrochemical cell. A charge selector for the battery is accessible at the exterior surface of the casing and preferably selectively prevents the voltage regulator from regulating the charging of the electrochemical cell.

Claims

1. A rechargeable battery having a user-selected charge capacity, comprising:

a. a rigid casing, the casing having an exterior surface;

b. an electrochemical cell within the casing;

c. a plurality of charge contacts accessible at the exterior surface of the casing, the charge contacts further in conductive contact with the electrochemical cell to allow charging of the electrochemical cell when a voltage is placed across the charge contacts;

d. a charge control circuit within the casing, the control circuit in conductive contact with at least the charge contacts and the electrochemical cell, the control circuit including a voltage regulator that regulates the charge voltage from the charge contacts to the electrochemical cell; and

e. a charge selector accessible at the exterior surface of the casing, the charge selector selectively alters the charging of the electrochemical cell.

2. The rechargeable battery of claim 1, wherein the voltage regulator is a diode.

3. The rechargeable battery of claim 2, wherein the charge selector is an actuated switch on the exterior of the casing.

4. The rechargeable battery of claim 3, wherein the actuating of the switch causes the diode of the control circuit to be bypassed.

5. The rechargeable battery of claim 1, wherein the control circuit further includes one or more device contacts for selectively providing a current to a device from the electrochemical cell.

6. A rechargeable battery having a selective charge capacity, comprising:

a. at least one rechargeable cell;

b. a control circuit coupled to the at least one rechargeable battery cell having a multiplicity of charging modes, each charging mode having a unique charging termination corresponding thereto; and

c. a means of selecting between charging modes.

7. The battery of claim 6, wherein a user actuates the means of selecting between charging modes.

8. The battery of claim 6, wherein the rechargeable battery further comprises a microprocessor having a memory and an embedded firmware algorithm embedded within.

9. The battery of claim 8, wherein the embedded firmware algorithm detects and records data corresponding to the amount of energy discharged from the at least one rechargeable battery cell.

10. The battery of claim 9, wherein the firmware algorithm actuates the means of selecting between charging modes based upon the data corresponding to the amount of energy discharged from the at least one rechargeable battery cell.

11. The battery of claim 7 or 10, wherein the charging mode is selected from the group consisting of limited duty, heavy duty and normal.

12. A rechargeable battery having a selective charge capacity, comprising:

a. at least one rechargeable cell;

b. a plurality of charge contacts accessible at the exterior of the at least one rechargeable cell to allow charging of the at least one rechargeable cell when a voltage is placed across the charge contacts;

c. a charge control circuit, the control circuit in conductive contact with at least the charge contacts, the control circuit including means for regulating the charging of the at least one rechargeable cell; and

d. a charge selector, the charge selector selectively changing the termination voltage of the at least one rechargeable battery cell.