Electric storage battery construction and method of manufacture
First Claim
1. An electric storage battery, comprising:
- a case hermetically sealed by a first end cap and a second end cap, wherein the case excludes fill holes and wherein the first end cap excludes fill holes and the second end cap excludes fill holes;
an electrically conductive terminal pin extending through the first end cap and electrically insulated from the case;
an electrode assembly disposed within the case,the electrode assembly includes an electrode in electrical communication with the pin and an electrode electrically insulated from the pin,the electrode assembly includes a mandrel mounted on the pin such that the electrodes are wound around the pin and the mandrel, anda portion of the electrode that is in electrical communication with the pin is positioned between the mandrel and the pin; and
a flexible conductive tab providing electrical communication between the second end cap and the electrode that is electrically insulated from the pin.
1 Assignment
0 Petitions
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.
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Citations
41 Claims
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1. An electric storage battery, comprising:
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a case hermetically sealed by a first end cap and a second end cap, wherein the case excludes fill holes and wherein the first end cap excludes fill holes and the second end cap excludes fill holes; an electrically conductive terminal pin extending through the first end cap and electrically insulated from the case; an electrode assembly disposed within the case, the electrode assembly includes an electrode in electrical communication with the pin and an electrode electrically insulated from the pin, the electrode assembly includes a mandrel mounted on the pin such that the electrodes are wound around the pin and the mandrel, and a portion of the electrode that is in electrical communication with the pin is positioned between the mandrel and the pin; and a flexible conductive tab providing electrical communication between the second end cap and the electrode that is electrically insulated from the pin. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An electric storage battery comprising:
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a case hermetically sealed by a first end cap and a second end cap, wherein the case excludes fill holes and wherein the first end cap excludes fill holes and the second end cap excludes fill holes; an electrically conductive terminal pin extending through the first end cap and electrically insulated from the case; an electrode assembly disposed within the case, the electrode assembly includes an electrode in electrical communication with the pin and an electrode electrically insulated from the pin, the electrode assembly includes a mandrel mounted on the pin such that the electrodes are wound around the pin and the mandrel, and a weld attaches the mandrel to the pin; and a flexible conductive tab providing electrical communication between the second end cap and the electrode that is electrically insulated from the pin. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 38, 39, 40, 41)
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37. The battery of 23, wherein the mandrel has a c-shaped cross-section.
Specification