PHYSICAL KEY TO FACILITATE AN INACTIVE MODE FOR A STATE-OF-CHARGE INDICATOR WITHIN A BATTERY

• US 20070132431A1
• Filed: 02/13/2007
• Published: 06/14/2007
• Est. Priority Date: 02/23/2005
• Status: Active Grant

• Current Assignee: EaglePicher Energy Products Corporation
• Original Assignee: EaglePicher Energy Products Corporation
• Inventors: Brand, Christo, Bruce, Gregg
• Granted Patent: US 7,482,941 B2
• Time in Patent Office: Days
• US Class Current: 320/149
• 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: H01M 10/448 End of discharge regulating measures
• CPC Class Codes: H01M 10/48 Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals, H01M50/569
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The invention provides a system and battery including a state-of-charge indicator (SOCI) to monitor and display the amount of charge within the battery. The SOCI is capable of operating in a hibernate mode, an active mode, and/or a sleep mode. The battery may be manufactured, shipped and/or stored with the SOCI operating in a power-saving hibernate mode. The SOCI may exit the hibernate mode and begin operating in active mode if a physical key connected to the battery is removed. In addition, the SOCI may operate in a sleep mode while the battery is not being used to conserve power. Furthermore, the invention provides a method of making a battery including a SOCI to monitor and display the state of charge of the battery.

Claims

1. A method of making a device to indicate an amount of available charge in at least one battery cell comprising the steps of:

providing a battery with at least one battery cell;

coupling a state-of-charge indicator to said at least one battery cell within said battery,

wherein said state-of-charge indicator comprises;

a ground signal;

a clock signal; and

circuitry coupling said ground signal and said clock signal; and

configuring said state-of-charge indicator to operate in a hibernation mode by coupling a detachable physical key to said ground signal and said clock signal.

2. The method of claim 1, wherein configuring said state-of-charge indicator to operate in a hibernation mode comprises the step of:

configuring said state-of-charge indicator to draw a minimum amount of charge from said at least one battery cell by coupling a detachable physical key to said ground signal and said clock signal.

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

configuring said state-of-charge indicator to operate in an active mode if said detachable physical key is removed from said ground signal and said clock signal.

4. The method of claim 3, wherein said step of configuring said state-of-charge indicator to operate in an active mode comprises the step of:

configuring said state-of-charge indicator to continuously monitor at least one of current, voltage and temperature of said at least one battery if said detachable physical key is removed from said ground signal and said clock signal.

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

configuring said state-of-charge indicator to operate in a sleep mode if said state-of-charge indicator does not detect a significant charge draw from said at least one battery for a predetermined period of time while said state-of-charge indicator is operating in said active mode.

6. The method of claim 5, wherein said step of configuring said state-of-charge indicator to operate in a sleep mode comprises the step of:

configuring said state-of-charge indicator to cease continuously monitoring said at least one battery if said state-of-charge indicator does not detect a significant charge draw from said at least one battery for a predetermined period of time while said state-of-charge indicator is operating in said active mode.

7. The method of claim 5, wherein said step of configuring said state-of-charge indicator to operate in a sleep mode comprises the step of:

configuring said state-of-charge indicator to periodically monitor at least one of current, voltage and temperature of said at least one battery if said state-of-charge indicator does not detect a significant charge draw from said at least one battery for a predetermined period of time while said state-of-charge indicator is operating in said active mode.

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

configuring said state-of-charge indicator to operate in said active mode if said state-of-charge indicator detects a significant charge draw in said at least one battery while operating in said sleep mode.

9. The method of claim 8, further comprising the steps of:

coupling a complete discharge device to said at least one battery cell; and

completely discharging said at least one battery cell,

wherein said at least one battery cell is completely discharged when a minimum threshold voltage is reached.