Browse Prior Art Database

SINGLE THERMODE TIP BACKUP BATTERY

IP.com Disclosure Number: IPCOM000006794D
Original Publication Date: 1993-Mar-01
Included in the Prior Art Database: 2002-Feb-01
Document File: 1 page(s) / 46K

Publishing Venue

Motorola

Related People

Jeffrey S. King: AUTHOR [+3]

Abstract

The attachment of backup batteries or cells to the PCB is a critical area of concern. Battery holders with dedicated contacts are expensive and require more processes and parts. B&polar leaded cells, which can be soldered to the PCB are popular but not practical from a process point of view. Two thermode tips must be used in the attachment process and overheating of the very thermally sensitive cell is a continuous issue. The overheating can either show up as a processing failure or much worse a latent defect in the field. The negative side of the cell is usually the seal side, and the seal is the most sensitive to heat. The remedy to the overheating issue is to use only one thermoding tip on the least sen- sitive side of the cell. This Aan be accomplished by mov- ing both the positive and negative leads to the appropri- ate side of the cell, while maintaining a coplanar lead configuration. The new system can be easily thermode& and with much less heat, which means a much more reliable component in the field.

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0 M

MO7.OROLA INC. Technical Developments Volume 16 March 1993

SINGLE THERMODE TIP BACKUP BATTERY

by Jeffrey S. King, Daniel A. Veaple and Mark C. Haynes

  The attachment of backup batteries or cells to the PCB is a critical area of concern. Battery holders with dedicated contacts are expensive and require more processes and parts. B&polar leaded cells, which can be soldered to the PCB are popular but not practical from a process point of view. Two thermode tips must be used in the attachment process and overheating of the very thermally sensitive cell is a continuous issue. The overheating can either show up as a processing failure or much worse a latent defect in the field. The negative

side of the cell is usually the seal side, and the seal is the most sensitive to heat. The remedy to the overheating issue is to use only one thermoding tip on the least sen- sitive side of the cell. This Aan be accomplished by mov- ing both the positive and negative leads to the appropri- ate side of the cell, while maintaining a coplanar lead configuration. The new system can be easily thermode& and with much less heat, which means a much more reliable component in the field.

CELL I B

130 0 Mofor01a 1°C. 1993

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