Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Battery Lead Configuration for Efficient Footprint Utilization

IP.com Disclosure Number: IPCOM000117029D
Original Publication Date: 1995-Dec-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 2 page(s) / 45K

Publishing Venue

IBM

Related People

Brady, MJ: AUTHOR [+4]

Abstract

Rectangular, flat and thin (less than 1 mm thick) batteries have been developed and are being marketed for various mobile microelectronic applications including smart cards and PCMCIA cards. A disadvantage of many thin battery designs is that the battery contact leads, which are an integral part of the current collectors, extend beyond the area of the battery. The current collectors are often fabricated by stamping out metal sheets such as copper, stainless steel, or nickel, or are made of metal sheets laminated on polymeric backing. When a current collector is stamped out, only a fraction of the material is used. This leads to waste of material. This can be substantial in large volume manufacturing. Also, the battery connection tabs occupy space on the circuit board.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 80% of the total text.

Battery Lead Configuration for Efficient Footprint Utilization

      Rectangular, flat and thin (less than 1 mm thick) batteries
have been developed and are being marketed for various mobile
microelectronic applications including smart cards and PCMCIA cards.
A disadvantage of many thin battery designs is that the battery
contact leads, which are an integral part of the current collectors,
extend beyond the area of the battery.  The current collectors are
often fabricated by stamping out metal sheets such as copper,
stainless steel, or nickel, or are made of metal sheets laminated on
polymeric backing.  When a current collector is stamped out, only a
fraction of the material is used.  This leads to waste of material.
This can be substantial in large volume manufacturing.  Also, the
battery connection tabs occupy space on the circuit board.

      Disclosed is a battery with a new lead configuration used in a
microelectronic package such as a smart card, PCMCIA card, mobile or
portable radio frequency device (Figure).  The battery is assembled
with current collectors that are chamfered or notched at the edges.
These current collectors are placed such that the chamfered or
notched edges are located on a different corner for each of the two
current collectors.  These corners are used as battery leads.
Connection is made by either soldering, conductive paste joining, or
other bonding technique.  For applications that require a thin
package, such as smart cards, t...