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SMART WELDING PALLETS

IP.com Disclosure Number: IPCOM000009658D
Original Publication Date: 2000-Jan-01
Included in the Prior Art Database: 2002-Sep-09
Document File: 2 page(s) / 99K

Publishing Venue

Motorola

Related People

Michael O'Dea: AUTHOR

Abstract

This paper deals with a means of electrically testing cylindrical cells or completed cell pack assemblies from one side only.

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M-LA @

SMART WELDING PALLETS

by Michael O'Dea

ABSTRACT

  This paper deals with a means of electrically testing cylindrical cells or completed cell pack assemblies from one side only.

INTRODUCTION

  Automated resistance welding machines are sometimes used in the manufacture of battery cell pack assemblies. As with all machines a means of transporting the product through the machine is required. Welding pallets with a clamping mecha- nism that holds the cells in position during the resis- tance welding operation are usually used on these machines.

  Either a walking beam or some form of servo driven shuttle system is usually utilized to move these pallets within the machine. A means of elec- trically testing the cells for voltage and polarity

before welding and completed cell pack assemblies for voltage or continuity after welding is considered good practice. This ensures that good cells in the correct orientation are welded and provides a means of screening out defective product.

PROBLEM TO BE SOLVED

  To test either individual cells or completed cell pack assemblies after welding dual test heads (top and bottom) are used to probe the cells during test- ing. These test heads have spring-loaded probes (Pogo Pins) attached to them. The probes allow for comtection back to the test equipment.

  However, the transportation methods used on these automated welding machines can restrict test- probing access from both sides. When dual test heads are used alignment of both heads is crucial to ensure correct contact and to minimize damage to the probes caused by misalignment.

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0 M MOTOROLA Technical Developments

Section A-A

SOLUTION

A means of testing the product from one side only can overcome the problem of restricted test access. A single test head (01) is used in conjunction wit...