Power supply
First Claim
Patent Images
1. A rechargeable power supply (10) comprising;
- at least one a rechargeable cell (12) connectable to a power source (14);
voltage protection means (20) connected to said at least one cell; and
disconnecting means (22) for selectively disconnecting said voltage protection means (20) from said cell (12) thereby to reduce any discharge of said cell through said voltage protection means (20).
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Abstract
A rechargeable power supply (10) comprises at least one a rechargeable cell (12) connectable to a power source (14), a Zener diode (20) connected to the at least one cell (12), and a bipolar transistor or FET (22) for selectively disconnecting the Zener diode (20) from the cell (12) thereby to reduce any discharge of the cell (12) through the voltage protection means (20). The Zener diode (20) and the transistor (22) are connected together in series and jointly connected across the cell in parallel.
20 Citations
8 Claims
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1. A rechargeable power supply (10) comprising;
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at least one a rechargeable cell (12) connectable to a power source (14);
voltage protection means (20) connected to said at least one cell; and
disconnecting means (22) for selectively disconnecting said voltage protection means (20) from said cell (12) thereby to reduce any discharge of said cell through said voltage protection means (20). - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of protecting a rechargeable cell (12) in a power supply (10), the method comprising:
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during recharging of said cell, selectively connecting voltage protection means (20) to said cell thereby to reduce or eliminate overcharging of said cell; and
after recharging of said cell, selectively disconnecting said voltage protection means from said cell thereby to reduce or eliminate any discharging of said cell through said voltage protection means.
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Specification