Re metal foil wrap, aluminium might burn at LI-ion fire temperature, but
copper or brass would not.
On 2024-05-31 16:42, James Pawson (U3C) wrote:
Hi folks,
We are working with a client on a small wearable device with a PS2
Li-Ion cell.
Annex M.4.3 requires a fire enclosure for the PS2 capable battery.
The plastic the client wants to use is not datasheet rated to UL 94
V-1 in the thickness they are using (testing could be performed to
establish this)
We are investigating the attached construction (also png icon here
<https://unit3compliancecouk-my.sharepoint.com/:i:/g/personal/james_unit3compliance_co_uk/EYDdhd6tpK1InDtDFOTVb4UB_KRHzF9nFOhPlI-RX7TLgA?e=QfhWw0>)
and I was looking for a sanity check to see if I was missing anything.
* Plastic case rated between HB40 and V-2 (6.3.1 for materials
outside a fire enclosure). Mechanically robust for drop test.
* PS2 battery with metal foil wrap (e.g. thick aluminium self
adhesive tape with no gaps other than cable egress) meeting fire
enclosure requirements in 6.4.8.2.2 (no material thickness specified)
* PS2 PCB circuit relies on reduce likelihood of ignition proved by
single fault testing
* VW-1 rated cable
I feel like I’m missing something important…
Thoughts and comments appreciated.
All the best
James
James Pawson
Managing Director & EMC Problem Solver
*Unit 3 Compliance Ltd*
*EMC : Environmental & Vibration : Electrical Safety : CE & UKCA :
Consultancy*
www.unit3compliance.co.uk <http://www.unit3compliance.co.uk/> |
[email protected] <mailto:[email protected]>
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Registered in England and Wales # 10574298
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available/contactable between 1300h to 1730h Mon/Tue/Thurs/Fri./
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on [email protected] <mailto:[email protected]> or
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Keep trying
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