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LiMnO2 BATTERY SUBCOMPONENTS: DEFORMATION AND PUNCHING OF PLANAR LITHIUM COUPONS FOR LAMINATION TO A NICKEL COLLECTOR

IP.com Disclosure Number: IPCOM000125731D
Publication Date: 2005-Jun-15
Document File: 2 page(s) / 100K

Publishing Venue

The IP.com Prior Art Database

Abstract

The present subject matter is adapted to produce planar lithium anodes for use in LiMnO2 batteries having flat stacks of battery electrodes. LiMnO2 batteries benefiting from the present subject matter are used in implantable medical devices such as pacemakers and defibrillators.

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LiMnO2

Battery

subcomponents:

deformation and punching of planar lithium coupons

for lamination to a nickel collector

The present subject matter is adapted to produce planar lithium anodes for use in LiMnO2 batteries having flat stacks of battery electrodes.  LiMnO2 batteries benefiting from the present subject matter are used in implantable medical devices such as pacemakers and defibrillators.

Referring to FIG. 1, a lithium ribbon, also termed a web, is dispensed 102 from a spool and is threaded into a press for deformation.  The ribbon has a first thickness when it is dispensed from the spool, and the press compresses 104 the lithium to a second, lesser thickness.  The press applies hydraulic pressure to the lithium using plates.  The movement of the plates is precisely controlled such that the lithium is compressed to a selected thickness.  As a result, the lithium demonstrates a more precisely controlled thickness having less dimensional variation than lithium dispensed from the spool.  Lithium compressed as such is easier to use in construction of a battery, as uncontrolled dimensional variation can negatively impact processing steps that rely on a consistent lithium thickness.
            The process is beneficial in designs using stacks of electrodes.  For example, a plurality of electrodes can be punched from the web 106.  These electrodes can then be stacked together 108.  Since each of the electrodes in the stack has a tighter tolerance, overal...