Peter,
I would begin by reviewing the construction of CE-marked portable tool
battery packs. Things such as UL-94V material, fuses, wiring, and so on.
Then see how this applies to the soft enclosure you are contemplating. I
would be concerned about what happens when the pack/cells are damaged
through an accident, misuse, abuse, etc. For example:
What type of physical impact test is required.
What happens to the pack when one falls on it from a great height.
If a cell ruptures does the polymeric material contain the corrosive
materials.
I recently ran my portable drill from an automobile battery and when the
drill stalled the clip leads went up in smoke. Perhaps a resettable fuse
device is needed. I know I'm deviating from the question of the polymeric
material but I thought I'd put in my two cents worth.
Dave
-----Original Message-----
From: Peter Merguerian [mailto:pmerguer...@itl.co.il]
Sent: Tuesday, December 17, 2002 3:11 AM
To: "EMC-PSTC (E-mail)" <
Subject: Fire Enclosure Design for NiCad Batteries
Hello All,
A battery belt made up of polymeric material similar to the one used to
manufacture school bags, consists of NiCad batteries. The battery belt is
to be used by builders in powering their battery tools during building
construction. The NiCad batteries are made of nickel plated steel, with a
thickness of 0.4 mm for the can and 1.2 mm for the cover. The 2 parts are
insultated with a polyamide insulator ring.
Can this construction of the batteries serve as the fire enclosure or should
a separate enclosure of more robust construction be made for the batteries?
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