Primary battery with internal voltage regulator

• US 7,633,261 B2
• Filed: 03/27/2007
• Issued: 12/15/2009
• Est. Priority Date: 03/27/2007
• Status: Expired due to Fees

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Feldmann, Frank E., Metka, William H., Baron, Mark A.
• Primary Examiner(s): TSO, EDWARD H
• Application Number:
  US11/691,628
• Publication Number:
  US 20080238368A1
• Time in Patent Office: 994 Days
• Field of Search: 320/107, 320/112, 320/128, 429/90, 429/91, 429/96, 429/99, 429/100
• US Class Current: 320/107
• CPC Class Codes: H01M 2200/00 Safety devices for primary or secondary batteries
• CPC Class Codes: H01M 6/5044 Cells or batteries structurally combined with cell condition indicating means

Abstract

A battery cell assembly includes a standard size primary high energy density battery cell assembly and a voltage regulator integrated within the battery cell assembly. A method for providing a standard size primary high energy density battery cell assembly includes integrating a voltage regulator circuit into a standard size primary high energy density battery assembly and regulating an output voltage of the high energy density battery cell assembly to match an output voltage of a standard primary battery. Embodiments of the present invention may integrate a voltage regulator into a commercially available primary high energy density battery cell. The voltage regulator as in one embodiment of the present invention may be used to downscale the output voltage of the high energy density battery cell. The high density battery assembly as in embodiments of the present invention may be used in existing equipment currently powered by standard primary batteries.

Claims

1. A battery cell assembly, comprising:

a standard size primary high energy density battery cell assembly;

a voltage regulator integrated within said battery cell assembly;

wherein said voltage regulator is included in a voltage regulator circuit, and

wherein said voltage regulator circuit includes;

an input capacitor;

an output capacitor;

a feed-forward capacitor; and

a first and second resistor arranged as a voltage divider.

2. The battery cell assembly of claim 1, wherein said battery cell assembly further includes a primary high energy density battery cell, and wherein said battery cell is contained within a hermetically sealed space.

3. The battery cell assembly of claim 1, wherein said battery cell assembly further includes a printed wiring board, and wherein said voltage regulator is mounted on said printed wiring board.

4. The battery cell assembly of claim 1, wherein said battery cell assembly further includes a primary high energy density battery cell, a terminal cap, and a current collector tab, and wherein said current collector tab electronically connects said battery cell with said terminal cap via said voltage regulator.

5. The battery cell assembly of claim 1, wherein said battery cell assembly further includes a lithium sulfuryl chloride DD cell having an output voltage of about 3.9 V.

6. The battery cell assembly of claim 1, wherein said voltage regulator regulates an output voltage of said battery cell assembly to an output voltage of a standard primary battery.

7. The battery cell assembly of claim 1, wherein said voltage regulator has a low dropout voltage and a low quiescent current.

8. The battery cell assembly of claim 1, wherein said battery cell assembly has a standard size D, C, AA, or AAA, and wherein said voltage regulator regulates an output voltage of said battery cell assembly to about 1.5 V.

9. The battery cell assembly of claim 1, wherein said battery cell assembly has a standard size DD or GO, and wherein said voltage regulator regulates an output voltage of said battery cell assembly to about 3.0 V.

10. A battery cell assembly useful in applications requiring uni-directional current of limited magnitude, comprising:

a primary lithium cell;

a voltage regulator circuit in electrical connection with said lithium cell;

a case having the size and shape of a standard primary battery, wherein said case accommodates said lithium cell and said voltage regulator circuit;

wherein said voltage regulator circuit is mounted on a circuit board integrated within said case;

wherein said voltage regulator circuit regulates an output voltage of said lithium cell to an output voltage of said standard primary battery;

wherein said voltage regulator circuit includes;

an input capacitor;

an output capacitor;

a feed-forward capacitor; and

a first and second resistor arranged as a voltage divider;

wherein said voltage regulator circuit limits current magnitude;

wherein said voltage regulator provides uni-directional current; and

wherein the battery cell assembly does not include fuses or diodes mounted on the circuit board.

11. The battery cell assembly of claim 10, wherein said lithium cell is a spiral wound lithium sulfuryl chloride cell having an output voltage of about 3.9 V.

12. The battery cell assembly of claim 10, wherein said standard primary battery is a standard size D, C, AA, or AAA alkaline or carbon-zinc battery having an output voltage of about 1.5 V.

13. The battery cell assembly of claim 10, wherein said case includes a lid and a hermetical seal, and wherein said lid and said hermetical seal form a hermetically sealed space within said case for receiving said battery cell.

14. The battery cell assembly of claim 10, wherein said voltage regulator circuit is mounted on the circuit board integrated within said case, and wherein said voltage regulator circuit includes a voltage regulator having a low dropout voltage and a low quiescent current.

15. A method for providing energy from a standard size primary high energy density battery cell assembly, comprising the steps of:

integrating a voltage regulator circuit into said high energy density battery assembly;

regulating an output voltage of said high energy density battery cell assembly to match an output voltage of a standard primary battery;

maintaining an electrical insulator between the battery cell and the voltage regulator circuit prior to use of the battery cell assembly; and

removing the electrical insulator to activate the voltage regulator circuit when use of the battery cell assembly is contemplated, whereby shelf life of the battery cell assembly is prolonged.

16. The method of claim 15, further including the step of:

mounting said voltage regulator circuit on a printed wiring board included in said high energy density battery assembly.

17. The method of claim 15, further including the steps of:

choosing the value of a first and a second resistor included in said voltage regulator circuit according to said output voltage of said standard primary battery; and

adjusting the output voltage of a voltage regulator included in said voltage regulator circuit to match said output voltage of said standard primary battery.

18. The method of claim 15, further including the steps of:

regulating an output voltage of about 3.9 V of said high energy density battery cell assembly down to about 3.0 V; and

providing said high energy density battery having a DD standard size.