Battery charging system
First Claim
1. A battery charging system, comprising;
- a current source;
a battery;
a voltage and current regulator which regulates voltage applied to said battery and current supplied to said battery and;
wherein said voltage and current regulator comprises;
an adjustable band-gap voltage reference diode, a voltage divider potentiometer, a resistor, and a transistor;
said adjustable band-gap voltage reference diode in series with said resistor, said series resistor and said band-gap voltage reference diode connected across said current source and said battery, said adjustable band-gap voltage reference diode having a reference input;
said voltage divider potentiometer connected across said current source and said battery, said voltage divider potentiometer having an output connected to said reference input of said adjustable band-gap voltage reference diode, and providing a reference input voltage at said reference input to said band-gap voltage reference diode;
said transistor having an emitter and a collector connected across said current source and said battery, said transistor having a base connected to a junction between said series connected resistor and said band-gap voltage reference diode, said band-gap reference diode, said series resistor, and said transistor operating in conjunction with one another to regulate voltage applied to said battery and current supplied to said battery.
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Accused Products
Abstract
A battery charging system comprising: a current source; a battery; and a voltage and current regulator, which regulates voltage applied to the battery and current supplied to the battery. The battery charging system shapes the current supplied to the battery, and may be used to taper the current supplied to the battery. The voltage and current regulator may comprise: an adjustable band-gap voltage reference diode, a potentiometer, a resistor, and a transistor, or an adjustable shunt regulator, and a transistor operating in conjunction with the adjustable shunt regulator, or other suitable voltage and current regulator means. The battery charging system regulates the current flow supplied to the battery, which originates from a constant charging current source. As the battery voltage exceeds a predefined terminal voltage, the battery charging system diverts charging current through a transistor, thus clamping the battery at the terminal voltage and shaping the current supplied to the battery.
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Citations
18 Claims
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1. A battery charging system, comprising;
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a current source;
a battery;
a voltage and current regulator which regulates voltage applied to said battery and current supplied to said battery and;
wherein said voltage and current regulator comprises;
an adjustable band-gap voltage reference diode, a voltage divider potentiometer, a resistor, and a transistor;
said adjustable band-gap voltage reference diode in series with said resistor, said series resistor and said band-gap voltage reference diode connected across said current source and said battery, said adjustable band-gap voltage reference diode having a reference input;
said voltage divider potentiometer connected across said current source and said battery, said voltage divider potentiometer having an output connected to said reference input of said adjustable band-gap voltage reference diode, and providing a reference input voltage at said reference input to said band-gap voltage reference diode;
said transistor having an emitter and a collector connected across said current source and said battery, said transistor having a base connected to a junction between said series connected resistor and said band-gap voltage reference diode, said band-gap reference diode, said series resistor, and said transistor operating in conjunction with one another to regulate voltage applied to said battery and current supplied to said battery. - View Dependent Claims (2, 3)
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4. A battery charging system, comprising:
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a current source;
a battery;
voltage regulator means, which regulates voltage applied to said battery; and
current regulator means, which regulates current supplied to said battery;
wherein said current regulator means shapes said current supplied to said battery;
wherein said current regulator means tapers said current supplied to said battery; and
wherein said voltage regulator means comprises;
an adjustable band-gap voltage reference diode, a potentiometer, and a resistor;
said adjustable band-gap voltage reference diode in series with said resistor, said series resistor and said band-gap voltage reference diode connected across said current source and said battery, said adjustable band-gap voltage reference diode having a reference input;
said voltage divider potentiometer connected across said current source and said battery, said voltage divider potentiometer having an output connected to said reference input of said adjustable band-gap voltage reference diode, and providing a reference input voltage at said reference input to said band-gap voltage reference diode. - View Dependent Claims (5, 6, 7, 8, 9)
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10. A battery charging system, comprising:
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a current source;
a battery;
an adjustable band-gap voltage reference diode in series with a resistor, said series resistor and said band-gap voltage reference diode connected across said current source and said battery, said adjustable band-gap voltage reference diode having a reference input;
a voltage divider potentiometer connected across said current source and said battery, said voltage divider potentiometer having an output connected to said reference input of said adjustable band-gap voltage reference diode, and providing a reference input voltage at said reference input to said band-gap voltage reference diode; and
a transistor having an emitter and a collector connected across said current source and said battery, said transistor having a base connected to a junction between said series connected resistor and said band-gap voltage reference diode, said band-gap reference diode, said series resistor, and said transistor operating in conjunction with one another to regulate voltage applied to said battery and current supplied to said battery. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification