Electric storage battery construction and method of manufacture
First Claim
8. The battery of claim A1 wherein said mandrel is welded to said pin.
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Accused Products
Abstract
An electric storage battery and method of manufacture thereof characterized by a feedthrough pin which is internally directly physically and electrically connected to an inner end of a positive electrode substrate. A C-shaped mandrel extends around the pin and substrate end enabling the pin/mandrel to be used during the manufacturing process as an arbor to facilitate winding layers of a spiral jellyroll electrode assembly. The pin additionally extends from the battery case and in the final product constitutes one of the battery terminals with the battery case comprising the other terminal. Active material is removed from both sides of the outer end of the negative electrode in the jellyroll to allow room for adhesive tape to secure the jellyroll. The electrolyte is injected through the open end of the case after the endcap is welded to the negative electrode but before sealing the endcap to the case. The electrolyte is preferably injected through the C-shaped mandrel to facilitate and speed filling.
111 Citations
65 Claims
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8. The battery of claim A1 wherein said mandrel is welded to said pin.
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9. The battery of claim A1 wherein said mandrel comprises titanium or an alloy thereof.
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10. An electric storage battery made by the steps of:
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providing an electrically conductive elongate pin having inner and outer ends;
providing a first polarity electrode strip;
providing a second polarity electrode strip;
electrically connecting a first end of the first polarity electrode strip to the pin proximate to the pin inner end;
mounting a reinforcing mandrel on the pin; and
winding together the first polarity electrode strip and the second polarity electrode strip to form a spiral roll having at least a portion of the pin within the spiral roll. - View Dependent Claims (11, 13, 14, 15)
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20. A method of constructing an electric storage battery including:
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providing an electrically conductive elongate pin having inner and outer ends;
providing a first polarity electrode strip;
providing a second polarity electrode strip;
electrically connecting a first end of said first polarity electrode strip to said pin proximate to said pin inner end;
mounting a reinforcing mandrel on the pin;
winding together said first polarity electrode strip and said second polarity electrode strip to form a spiral roll having at least a portion of the pin within the spiral roll. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28)
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29. An electrode assembly including:
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an electrically conductive, elongate pin;
an elongate reinforcing mandrel mounted on at least a portion of said pin; and
a spiral roll comprising first and second opposite polarity electrode strips and at least one separator strip separating said electrode strips mounted on said pin, wherein one of said electrode strips is electrically coupled to said pin. - View Dependent Claims (30, 31, 32, 33)
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34. An electrode assembly made by the steps of:
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providing an electrically conductive, elongate pin;
providing a first polarity electrode strip;
providing a second polarity electrode strip;
electrically connecting a first end of the first polarity electrode strip to the pin;
mounting a reinforcing mandrel on the pin; and
winding together the first polarity electrode strip and the second polarity electrode strip to form a spiral roll having at least a portion of the pin and the mandrel interior to the spiral roll. - View Dependent Claims (35, 36, 37, 38)
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39. A method of constructing an electric storage battery including:
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providing an electrically conductive, elongate pin;
providing a first polarity electrode strip;
providing a second polarity electrode strip;
electrically connecting a first end of said first polarity electrode strip to said pin;
mounting a reinforcing mandrel on said pin; and
winding together the first polarity electrode strip and the second polarity electrode strip to form a spiral roll. - View Dependent Claims (1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 40, 41, 42)
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42-1. The method of claim 39 wherein said step of winding together the first polarity electrode strip and the second polarity electrode strip to form a spiral roll comprises leaving a portion of the pin extending beyond the spiral roll to form a battery terminal.
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43. An electric storage battery comprising:
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an electrically conductive case sealed by first and second end caps;
an electrically conductive terminal pin extending through said first end cap and electrically insulated from said case;
an electrode assembly disposed within said case and comprising first and second opposite polarity electrodes separated by separators wherein said first electrode is electrically coupled to said pin;
a flexible conductive tab electrically coupled to said second electrode proximate a first location at the seal formed between said second end cap and said case;
wherein said second end cap has a center and wherein said second end cap has a width from said first location to a second location at the seal formed between said second end cap and said case measured along a line through said center; and
said tab electrically connected to said second end cap at a third location between said second location and said center of said second end cap. - View Dependent Claims (44, 45, 46)
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47. An electric storage battery made by the steps of:
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providing a case comprising a peripheral wall of electrically conductive material defining an interior volume and having first and second wall openings communicating with the interior volume;
providing an electrically conductive terminal pin extending through a first end cap and electrically insulated from the case providing an electrode assembly comprising first and second opposite polarity electrodes electrically connecting the first electrode to the pin;
forming a flexible conductive tab extending beyond a second edge of the electrode assembly and electrically connected to the second electrode;
mounting the electrode assembly in the interior volume with the pin extending out through the first wall opening and the tab extending out through the second wall opening;
mounting the first end cap to seal the first wall opening;
providing a second end cap of electrically conductive material; and
fastening the second end cap to the tab in a manner to provide an electrical connection therebetween. - View Dependent Claims (48, 49, 50)
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51. A method of constructing an electric storage battery including:
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providing a case comprising a peripheral wall of electrically conductive material defining an interior volume and having first and second wall openings communicating with the interior volume;
providing an electrically conductive terminal pin extending through a first end cap and electrically insulated from the case providing an electrode assembly comprising first and second opposite polarity electrodes wherein the first electrode is electrically connected to the pin;
forming a flexible conductive tab extending beyond a second edge of the electrode assembly and electrically connected to the second electrode;
mounting the electrode assembly in the interior volume with the pin extending out through the first wall opening and the tab extending out through the second wall opening;
mounting the first end cap to seal the first wall opening;
providing a second end cap of electrically conductive material; and
fastening the second end cap to the tab in a manner to provide a mechanical and electrical connection therebetween. - View Dependent Claims (52, 53, 54)
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55. An electric storage battery comprising:
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an electrically conductive case hermetically sealed by first and second end caps, wherein said case has no separate fill holes and wherein said first and second end caps have no separate fill holes;
an electrically conductive terminal pin extending through said first end cap and electrically insulated from said case;
an electrode assembly disposed within said case and comprising first and second opposite polarity electrodes separated by separators wherein said first electrode is electrically coupled to said pin; and
a flexible conductive tab electrically coupled to said second electrode and to said second end cap.
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56. An electric storage battery made by the steps of:
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providing a case comprising a peripheral wall of electrically conductive material defining an interior volume and having first and second wall openings communicating with the interior volume;
providing an electrically conductive terminal pin extending through the first end cap and electrically insulated from the case;
providing an electrode assembly comprising first and second opposite polarity electrodes electrically coupling the first electrode to the pin;
mounting the electrode assembly in the interior volume with the pin extending out through the first wall opening;
mounting the first end cap to seal the first wall opening;
providing a second end cap of electrically conductive material; and
electrically coupling the second electrode to the second end cap;
depositing electrolyte into the case through the second wall opening; and
mounting the end cap in the second wall opening to seal the second wall opening. - View Dependent Claims (57)
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58. A method of constructing an electric storage battery including:
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providing a case comprising a peripheral wall of electrically conductive material defining an interior volume and having first and second wall openings communicating with the interior volume;
providing an electrically conductive terminal pin extending through the first end cap and electrically insulated from the case;
providing an electrode assembly comprising first and second opposite polarity electrodes electrically coupling the first electrode to the pin;
mounting the electrode assembly in the interior volume with the pin extending out through the first wall opening;
mounting the first end cap to seal the first wall opening;
providing a second end cap of electrically conductive material; and
electrically coupling the second electrode to the second end cap;
depositing electrolyte into the case through the second wall opening; and
mounting the end cap in the second wall opening to seal the second wall opening. - View Dependent Claims (59)
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60. A hermetically sealable electric storage battery comprising:
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a case having an open end;
a first electrically conductive terminal electrically insulated from said case;
an electrode assembly disposed within said case and comprising first and second opposite polarity electrodes separated by separators wherein said first electrode is electrically coupled to said first terminal;
a flexible conductive tab electrically coupled to said second electrode proximate a first location at said case open end;
said tab electrically connected to said end cap at a second location whereby said end cap has a first bias position tending to keep said case open end open and a second bias position tending to close said case open end. - View Dependent Claims (61, 62, 63, 64, 65)
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Specification