Electrochemical device for generating direct current

• US 5,756,228 A
• Filed: 09/12/1996
• Issued: 05/26/1998
• Est. Priority Date: 12/06/1994
• Status: Expired due to Term

• Current Assignee: Ilan Herbst, Jacob Herbst, Ophir Herbst
• Original Assignee: Ilan Herbst, Jacob Herbst, Ophir Herbst
• Inventors: Roseanou, Lou
• Primary Examiner(s): Maples, John S.
• Application Number:
  US08/713,196
• Time in Patent Office: 621 Days
• Field of Search: 429/110, 429/127, 429/113, 429/95, 429/67-70, 429/50, 29/623.3, 29/623.5
• US Class Current: 429/68
• CPC Class Codes: H01M 10/4214 Arrangements for moving electrodes or electrolyte
• CPC Class Codes: H01M 6/14 Cells with non-aqueous electrolyte
• CPC Class Codes: H01M 6/30 Deferred-action cells
• CPC Class Codes: H01M 8/22 Fuel cells in which the fuel is based on materials comprising carbon or oxygen or hydrogen and other elements; Fuel cells in which the fuel is based on materials comprising only elements other than carbon, oxygen or hydrogen
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02E 60/50 Fuel cells

Abstract

The electro-chemical apparatus for generating direct current comprises two flat and thin stainless steel tapes (30,30'"'"') representing anode and cathode respectively owing to the anode strip being covered with an anode material such as lithium. The tapes are wound of a first pair of spaced apart reels (31,31'"'"') at identical linear velocity and their inside surfaces are brought into a close relationship while the tapes are moved through the gap between two graphite block collectors (12.12'"'"') which are urged onto the tape outsides. After having passed the collectors the tapes are separated again and wound up on a second pair of spaced apart reels (32,32'"'"'). Before entering the gap between the collectors an electrolyte (22), such as thionyl chloride in a paste condition is evenly applied to the inside surface of one of the tapes. As soon as the tape insides are in a close relationship to each other within the gap between the collectors, current starts to be generated by electro-chemical reaction and to be collected by the graphite collectors upon having reached the desired level and is then conducted to a consumer.

Claims

1. An electro-chemical device for electro-chemically generating a direct current which comprises:

two strips of a conductive material, each of said two strips having an inside surface and an outside surface, said two strips representing respectively an anode and a cathode, said two strips being moved from two spaced apart storage devices at substantially identical velocities, the inside surface of each of said two strips coming into a close relationship along a path of travel,

an electrolyte being continuously supplied onto the inside surface of one of said two strips before said path of travel, and

at least one current collector which is in contact with said two strips and which collects electro-chemically generated direct current, said at least one current collector for conducting direct current to a current consumer.

2. The device as defined in claim 1, wherein said strips are flat and are thin metal strips of substantially identical width.

3. The device of claim 2, wherein, said metal strips are stainless steel strips.

4. The device of claim 3, wherein said metal strips are of a chemically passive material.

5. The device of claim 3, wherein said stainless steel strips are of a thickness of 10 micron.

6. The device of claim 1, wherein the inside surface of at least one of said metal strips is covered with an anode material which is consumed during passage through said path by an electrolyte which is reactive with said anode material.

7. The device of claim 1, wherein said two storage devices are two first reels, said two strips being respectively wound off said two first reels, are conveyed through said path and are wound up on two second reels mounted after said path, said second two reels being rotated at substantially identical velocities by motor means and transmission means.

8. The device of claim 1, wherein said strips are urged into contact with each other by application of pressure on their outside surfaces by rollers mounted within said path.

9. The device of claim 1, wherein the surfaces of said strips during their passage through said path are substantially horizontal.

10. The device of claim 9 wherein said electrolyte is stored in a container and poured onto the inside surface of a lower positioned strip by means of a spout of a width coextensive with the width of said strip.

11. The device of claim 1, wherein said current collectors are graphite blocks urged onto the outside of said strips in said path.

12. The device of claim 6, wherein the anode material covering the inside of one of said strips is lithium, and wherein said electrolyte is thionyl chloride in a paste form.

13. The device of claim 8, wherein said two strips are guided onto said second reels by guide pulleys.

14. The device of claim 1, said device delivering 25 kWh in the form of eight identical units, each unit containing said two strips of stainless steel of a width of 270 mm, one of said strips being covered by a layer of lithium, said strips being conveyed at a linear velocity of 35 mm/s through the path, said path having a length of 350 mm, and wherein the electrolyte is thionyl chloride in a flowing paste form.

15. The device of claim 14, wherein said layer of lithium on the inside of one of said strips is 15 microns thick.

16. The device of claim 1, wherein the two strips are stainless steel.

17. The device of claim 16, wherein the two strips have a width of 50 to 300 nm.

18. The device of claim 17, wherein the two strips move at a velocity of 1 to 50 mm/s.

19. An electro-chemical device for electro-chemically generating a direct current which comprises:

two strips of a conductive material, each of said two strips having an inside surface and an outside surface, one of said two strips having a lithium coating on an inside surface thereof and being an anode, the other of said two strips being made of stainless steel and being a cathode, said two strips being moved from two spaced apart storage devices at substantially identical velocities, the inside surface of each of said two strips coming into a close relationship along a path of travel,

an electrolyte being continuously supplied onto the inside surface of the cathode before said path of travel, and

at least one current collector which is in contact with said two strips and which collects electro-chemically generated direct current, said at least one current collector for conducting direct current to a current consumer.

20. The electrochemical device of claim 19, wherein the electrolyte is thionyl chloride.

21. The electro-chemical device of claim 20, wherein the anode is stainless steel having the lithium coating on an inside surface thereof.