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An electrochemical cell is described. The cell comprises a cathode material contacted to a perforated current collector having a portion left uncovered and an anode material contacted to an anode current collector. The anode comprises first and second strips positioned on opposite sides of the catho

An electrochemical cell is described. The cell comprises a cathode material contacted to a perforated current collector having a portion left uncovered and an anode material contacted to an anode current collector. The anode comprises first and second strips positioned on opposite sides of the cathode, which is also in the form of a strip, but one that is much longer than each of the anode strips. Proximal ends of the anode strips reside adjacent to where the cathode is secured to a terminal pin/sleeve assembly. Distal ends of the anode strips are adjacent to the opposed ends of the cathode strip. A separator sheet segregating the anode from direct contact with the cathode provides an upper portion at least partially sealed to a lower portion along an aligned peripheral edge and through the uncovered perforations of the cathode current collector to lock the cathode in position. The anode and cathode are then wound into a galaxy electrode assembly housed in a cylindrical casing and activated with an electrolyte.

대표청구항 ▼

What is claimed is: 1. An electrochemical cell, which comprises: a) a terminal pin; b) a first electrode strip comprising a first current collector having a right current collector portion and a left current collector portion extending in opposite directions from an intermediate current collector p

What is claimed is: 1. An electrochemical cell, which comprises: a) a terminal pin; b) a first electrode strip comprising a first current collector having a right current collector portion and a left current collector portion extending in opposite directions from an intermediate current collector portion, the right and left current collector portions being contacted by an electrode active material to thereby form a right first electrode portion and a left first electrode portion with the intermediate current collector portion being left uncovered and secured to the terminal pin; c) a first separator comprising a lower first separator portion covering a lower surface of the first electrode strip and an upper first separator portion covering an upper surface of the first electrode strip, wherein the intermediate current collector portion is at least partially perforated with the lower first separator portion being secured to the upper first separator portion through the perforations in the intermediate current collector portion; d) a second, counter electrode comprising a right second electrode strip and a left second electrode strip, each of the second electrode strips comprising a counter electrode active material contacted to a second current collector, wherein the right second electrode strip is disposed in an overlapping relationship with the right first electrode portion, one on top of the other, and the left second electrode strip is disposed in an overlapping relationship with the left first electrode portion, one on top of the other, with the lower first separator portion secured to the upper first separator portion through the perforations in the intermediate current collector portion physically segregating the first electrode from direct contact with the second electrode, wherein the first and second electrodes are characterized as having been wound into an electrode assembly with the terminal pin serving as the terminal for the first electrode strip; e) a casing housing the electrode assembly and serving as a counter terminal for the second electrode electrically insulated from the first electrode; and f) an electrolyte activating the first and second electrodes housed in the casing. 2. The electrochemical cell of claim 1 wherein the right and left second electrode strips each have a proximal end positioned adjacent to where the uncovered intermediate portion of the first current collector is secured to the terminal pin and a distal end adjacent to spaced apart ends of the first electrode. 3. The electrochemical cell of claim 1 wherein the first current collector is perforated where it is contacted by the electrode active material. 4. The electrochemical cell of claim 1 wherein the terminal pin electrically connected to the first current collector at the uncovered intermediate portion extends out beyond the separator to interrupt a sealed peripheral separator edge thereof and wherein the terminal pin is electrically insulated from the casing connected to the second electrode as its terminal. 5. The electrochemical cell of claim 4 wherein the terminal pin is supported in a lid by an insulating glass and wherein the lid is fitted to the casing housing the first and second electrodes. 6. The electrochemical cell of claim 4 wherein the terminal pin is received in a couple directly connected to the uncovered intermediate portion of the first current collector. 7. The electrochemical cell of claim 1 wherein in the wound electrode assembly, the second current collectors of the respective right and left second electrode strips each provide at least one extending lead. 8. The electrochemical cell of claim 1 wherein together the second current collectors of the respective right and left second electrode strips provide at least two leads captured between a lid and a cylindrical tube comprising the casing. 9. An electrochemical cell, which comprises: a) a terminal pin; b) a first electrode comprising at least two first electrode strips, each comprising an electrode active material contacted to a first current collector, wherein a left portion of a right one of the first current collectors and a right portion of a left one of the first current collectors are left uncovered by the electrode active material and secured to the terminal pin; c) a first separator comprising a lower first separator portion covering a lower surface of the first electrode and an upper first separator portion covering an upper surface of the first electrode, wherein the left portion of the right first current collector and the right portion of the left current collector are at least partially perforated with the lower first separator portion being secured to the upper first separator portion through these perforations; d) a second, counter electrode comprising a right second electrode strip and a left second electrode strip, each of the second electrode strips comprising a counter electrode active material contacted to a second current collector, wherein the right second electrode strip is disposed in an overlapping relationship with the right first electrode strip, one on top of the other, and the left second electrode strip is disposed in an overlapping relationship with the left first electrode strip, one on top of the other, with the lower first separator portion secured to the upper first separator portion through the perforations in the right and left first current collectors physically segregating the first electrode from direct contact with the second electrode, wherein the first and second electrodes are characterized as having been wound into an electrode assembly with the terminal pin serving as the terminal for the first electrode; e) a casing housing the electrode assembly and serving as a counter terminal for the second electrode electrically insulated from the first electrode; and f) an electrolyte activating the first and second electrodes housed in the casing. 10. The electrochemical cell of claim 9 wherein the first electrode is the cathode and the second electrode is the anode. 11. The electrochemical cell of claim 9 wherein the uncovered portions of the first current collectors are secured to diametrically opposite positions on the terminal pin. 12. The electrochemical cell of claim 9 wherein the terminal pin electrically connected to the first current collectors at their uncovered portions extends out beyond the separator to interrupt a sealed peripheral edge thereof and wherein the terminal pin is electrically insulated from the casing connected to the anode as its terminal. 13. The electrochemical cell of claim 9 wherein the terminal pin is supported in a lid by an insulating glass and wherein the lid is fitted to a cylindrical casing housing the first and second electrodes. 14. The electrochemical cell of claim 9 wherein the terminal pin is of molybdenum and received in a couple secured to the uncovered portion of the first current collectors. 15. The electrochemical cell of claim 9 wherein in the wound electrode assembly, an outer wrap of the second electrode has the counter electrode active material on only an inner side of the second current collectors. 16. The electrochemical cell of claim 9 wherein the second current collectors of the respective right and left second electrode strips each have extending leads captured between a lid and a cylindrical tube comprising the casing. 17. The electrochemical cell of claim 9 wherein the right and left second electrode strips each have a proximal end positioned adjacent to where the uncovered portions of the right and left first current collectors are secured to the terminal pin and a distal end adjacent to spaced apart ends of the right and left first electrode strips. 18. A method for providing an electrochemical cell, comprising the steps of: a) contacting a cathode active material to a cathode current collector to form a cathode in the form of a cathode strip having a right cathode current collector portion and a left cathode current collector portion extending in opposite directions from an intermediate cathode current collector portion left uncovered by the cathode active material; b) electrically connecting a terminal pin to the uncovered portion of the cathode current collector; c) contacting an anode active material to an anode current collector to form an anode in the form of an anode strip; d) providing a first separator comprising a lower first separator portion and an upper separator portion and covering a lower surface of the cathode with the upper first separator portion and an upper surface of the cathode with the upper separator portion, and securing the lower first separator portion to the upper first separator portion through perforations in the intermediate cathode current collector portion; e) aligning the anode strip with the cathode strip in an overlaying relationship and winding them into a galaxy wound electrode assembly; f) housing the electrode assembly in a casing, wherein the terminal pin joined to the cathode is electrically insulated from the casing connected to the anode as its terminal; and g) activating the anode and the cathode with an electrolyte. 19. The method of claim 18 including providing the anode in the form of two anode strips, each having a proximal end residing adjacent to where the uncovered portion of the cathode current collector is secured to the terminal pin and a distal end adjacent to spaced apart ends of the cathode. 20. The method of claim 18 including providing the terminal pin having opposed first and second ends extending beyond a sealed peripheral edge of the separator and imparting a rotational force to at least one of the first and second terminal pin ends to wind the overlaying anode and cathode into the galaxy wound electrode assembly. 21. The method of claim 18 including supporting the first end of the terminal pin in a lid for a casing by an insulating sealing glass and fitting the lid into a cylindrical casing housing the galaxy wound electrode assembly. 22. The method of claim 18 including the anode current collector providing at least one extending lead captured between a cylindrical tube and a lid comprising the casing. 23. The method of claim 18 including providing the anode contacting the casing as the negative terminal and wherein an outer wrap of the galaxy wound electrode assembly has the anode active material on only an inner side of the anode current collector. 24. An electrochemical cell, which comprises: a) a terminal pin; b) a first electrode strip comprising a first current collector having a right current collector portion and a left current collector portion extending in opposite directions from an intermediate current collector portion, the right and left current collector portions being contacted by an electrode active material to thereby form a right first electrode portion and a left first electrode portion with the intermediate current collector portion being left uncovered and secured to the terminal pin; c) a first separator comprising a lower first separator portion covering a lower surface of the first electrode strip and an upper first separator portion covering an upper surface of the first electrode strip, wherein the intermediate current collector portion is at least partially perforated with the lower first separator portion being secured to the upper first separator portion through the perforations in the intermediate current collector portion; d) a second, counter electrode comprising a counter electrode active material contacted to a second current collector, wherein the second electrode is disposed in an overlapping relationship with the first electrode with the lower first separator portion secured to the upper first separator portion through the perforations in the intermediate current collector portion physically segregating the first electrode from direct contact with the second electrode, wherein the first and second electrodes are characterized as having been wound into an electrode assembly with the terminal pin serving as the terminal for the first electrode strip; e) a casing housing the electrode assembly and serving as a counter terminal for the second electrode electrically insulated from the first electrode; and f) an electrolyte activating the first and second electrodes housed in the casing.