Rechargeable direct current power source

• US 6,307,350 B1
• Filed: 07/30/1999
• Issued: 10/23/2001
• Est. Priority Date: 07/30/1999
• Status: Expired due to Fees

• Current Assignee: JA Effect, LLC
• Original Assignee: JA Effect, LLC
• Inventors: Alderman, Robert J.
• Primary Examiner(s): Tso, Edward H.
• Application Number:
  US09/364,336
• Time in Patent Office: 816 Days
• Field of Search: 320/116, 320/117, 320/118, 320/119, 320/120, 320/121
• US Class Current: 320/116
• 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 10/441 for several batteries or cells simultaneously or sequentially
• CPC Class Codes: H01M 10/46 Accumulators structurally combined with charging apparatus circuits for charging H02J7/00
• CPC Class Codes: H02J 7/0024 Parallel/serial switching of connection of batteries to charge or load circuit
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A preferred embodiment of the renewable direct current power source of the present invention includes input terminals which are adapted to receive recharge voltage from a relatively low voltage power source and output terminals which are adapted to provide a battery-output voltage, with the battery-output voltage being higher than the recharge voltage. Preferably, a plurality of rechargeable battery cells are electrically interconnected between the input terminals and the output terminals and are configured to electrically interconnect with each other in series during discharge. A method aspect also is provided.

Claims

1. A rechargeable battery comprising:

input terminals adapted and arranged to receive a recharge voltage;

output terminals adapted and arranged to provide battery-output voltage across said output terminals, said battery-output voltage being higher than the recharge voltage; and

a plurality of rechargeable battery cells electrically interconnected between said input terminals and said output terminals, said plurality of rechargeable battery cells being configured to electrically interconnect with each other in series during discharge of said rechargeable battery such that said plurality of rechargeable battery cells provide said battery-output voltage to said output terminals;

wherein said rechargeable battery has a sequencer electrically interconnected between said input terminals and said battery cells such that the recharge voltage provided at said input terminals is delivered to said sequencer and then sequentially delivered to each of said battery cells.

2. The rechargeable battery of claim 1, wherein said rechargeable battery has a diode interconnected between said input terminals and each of said battery cells, each of said diodes having an associated voltage drop, such that said plurality of battery cells are configured to electrically interconnect in series when the recharge voltage applied at said input terminals is lower than said voltage drop.

3. The rechargeable battery of claim 1, wherein said rechargeable battery has a voltage multiplier circuit interconnected between said input and each of said battery cells, each of said voltage multiplier circuits having a circuit input, a circuit output and a plurality of charging capacitors interconnected between said circuit input and said circuit output, each of said voltage multiplier circuits configured to alternately electrically interconnect said plurality of charging capacitors in parallel and in series such that recharge voltage is provided across said plurality of charging capacitors, intermittently added and provided as said circuit-boosted voltage at said circuit output, said circuit-boosted voltage then being applied to one of said battery cells.

4. The rechargeable battery of claim 3, wherein said voltage multiplier circuit has mechanical switches, such that said mechanical switches cooperate to selectively configure said plurality of charging capacitors in parallel and in series.

5. The rechargeable battery of claim 3, wherein said voltage multiplier circuit has means for selectively configuring said plurality of charging capacitors in parallel and in series.

6. A rechargeable battery comprising:

input terminals adapted and arranged to receive a recharge voltage;

output terminals adapted and arranged to provide battery-output voltage across said output terminals, said battery-output voltage being higher than the recharge voltage; and

a plurality of rechargeable battery cells electrically interconnected between said input terminals and said output terminals, said plurality of rechargeable battery cells being configured to electrically interconnect with each other in series during discharge of said rechargeable battery such that said plurality of rechargeable battery cells provide said battery-output voltage to said output terminals;

wherein said rechargeable battery has a voltage multiplier circuit interconnected between said input and said battery cells, said voltage multiplier circuit having a circuit input, a circuit output and a plurality of charging capacitors interconnected between said circuit input and said circuit output, said voltage multiplier circuit configured to alternately electrically interconnect said plurality of charging capacitors in parallel and in series such that recharge voltage is provided across said plurality of charging capacitors, intermittently added and provided as said circuit-boosted voltage at said circuit output, said circuit-boosted voltage then being applied to said battery cells; and

wherein said rechargeable battery has a sequencer electrically interconnected between said voltage multiplier circuit and said battery cells such that said circuit-boosted voltage provided at said circuit output is delivered to said sequencer and then sequentially delivered to each of said battery cells.

7. The rechargeable battery of claim 6, wherein said voltage multiplier circuit has mechanical switches, such that said mechanical switches cooperate to selectively configure said plurality of charging capacitors in parallel and in series.

8. The rechargeable battery of claim 6, wherein said voltage multiplier circuit has means for selectively configuring said plurality of charging capacitors in parallel and in series.

9. The rechargeable battery of claim 6, wherein said rechargeable battery has a diode interconnected between said input terminals and each of said battery cells, each of said diodes having an associated voltage drop, such that said plurality of battery cells are configured to electrically interconnect in series when the recharge voltage applied at said input terminals is lower than said voltage drop.

10. A rechargeable battery adapted for being recharged by a relatively low voltage power source and for powering an electronic device, the relatively low voltage power source providing a recharge voltage, said rechargeable battery comprising:

input terminals adapted and arranged to receive recharge power from a relatively low voltage power source during recharge of said rechargeable battery;

output terminals adapted and arranged to apply battery-boosted voltage to an electronic device during discharge of said rechargeable battery, said battery-boosted voltage being higher than the recharge voltage;

a plurality of rechargeable battery cell stages electrically interconnected between said input terminals and said output terminals, each of said battery cell stages comprising a battery cell and first and second diodes, said battery cell being interposed between said first and second diodes, said battery cell stages configured to electrically interconnect with each other in parallel such that the recharge voltage applied at said input terminals during recharge is provided across each of said battery cells, then said battery cell stages interconnect with each other in series such that the recharge power is added, and provided as battery-output voltage at said output terminals during discharge;

wherein a voltage multiplier circuit is interconnected between said input terminals and said battery cell stages, said voltage multiplier circuit having a circuit input, a circuit output and a plurality of charging capacitors interconnected between said circuit input and said circuit output, said voltage multiplier circuit configured to electrically interconnect said plurality of charging capacitors in parallel when the recharge voltage is present at said circuit input, and further configured to electrically interconnect said plurality of charging capacitors in series when the recharge voltage at said circuit input approaches zero, such that the recharge voltage across said plurality of charging capacitors is added and provided as circuit-boosted voltage at said circuit output for delivery to said battery cell stages; and

wherein said voltage multiplier circuit has at least one circuit stage, each of said circuit stages comprising;

a first and second capacitor;

a transistor interposed between said first and second capacitors; and

a plurality of diodes interconnected among said transistor and said first and second capacitors, said plurality of diodes being configured to respond to the recharge voltage applied to said circuit input so that when a voltage is present at said circuit input said first and second capacitors are effectively connected in parallel across said circuit input, said plurality of diodes being further configured to respond to the recharge voltage applied to said circuit input so that when the voltage applied to said circuit input approaches zero, said first and second capacitors are effectively connected in series through said transistor, so that a voltage across each of said first and second capacitors is added and applied as circuit-boosted voltage at said circuit output for delivery to said battery cell stages.

11. The rechargeable battery of claim 10, wherein said voltage multiplier circuit has means for selectively configuring said plurality of charging capacitors in parallel and in series.

12. The rechargeable battery of claim 10, wherein said voltage multiplier circuit has mechanical switches, such that said mechanical switches cooperate to selectively configure said plurality of charging capacitors in parallel and in series.

13. A method for providing direct current electrical power comprising the steps of:

providing a rechargeable battery having input terminals and output terminals, said rechargeable battery being adapted to provide an output voltage across said output terminals during discharge, said rechargeable battery having a plurality of battery cells and;

recharging said rechargeable battery utilizing only a recharge voltage by configuring said plurality of battery cells in parallel and sequentially applying said recharge voltage to each of said plurality of battery cells; and

configuring said plurality of battery cells in series such that charge provided to each of said battery cells during recharge is added and is then provided to said output terminals as said output voltage.

14. The method of claim 13, wherein the step of sequentially applying said recharge voltage to each of said plurality of battery cells comprises the steps of:

providing a sequencer electrically interconnected between said input terminals and said battery cells such that the recharge voltage provided at said input terminals is delivered to said sequencer; and

sequentially applying said recharge voltage from said sequencer to each of said plurality of battery cells.