Rich, Ted, All The product has an outer enclosure that provides suitable mechanical strength and the battery is IEC62133 compliant charged and discharged via a suitable chip
There's a product requirement for a yellow enclosure, and we can't find a suitable yellow plastic with enough fire retardancy. The issue is that Clause M.4.3 mandates a fire enclosure and it's never clear (to me anyway) whether some batteries actually have their own fire enclosure as I don't see this listed anywhere, and you might get for Conditions of Acceptability for a Recognised Component PSU. If a LiIon battery really does "cook off" I'm not sure what enclosure would actually contain it - I guess it might be as much about whether the enclosure provides more fuel, but I'm not sure as to the intent of the clause in the standard Best regards Charlie Charlie Blackham Sulis Consultants Ltd Tel: +44 (0)7946 624317 Web: https://sulisconsultants.com/ Registered in England and Wales, number 05466247 From: Richard Nute <ri...@ieee.org> Sent: 08 October 2021 22:42 To: Charlie Blackham <char...@sulisconsultants.com>; EMC-PSTC@LISTSERV.IEEE.ORG Subject: RE: [PSES] UL 510 Flame retardant tape Hi Charlie: Rather than guess: https://www.kaptontape.com/PDF/Kapton_Films_Datasheet.pdf https://www.dupont.com/content/dam/dupont/amer/us/en/products/ei-transformation/documents/DEC-Kapton-HN-datasheet.pdf https://www.dupont.com/content/dam/dupont/amer/us/en/products/ei-transformation/documents/EI-10167-Kapton-General-Specifications.pdf After looking at the above specs, I'm inclined to believe that Kapton tape will provide an acceptable fire enclosure (as good as any other plastic material). It is tough stuff! And relatively expensive. If you are going to test it (as suggested by Ted), I suggest a side-by-side test with the alternate fire enclosure plastic material. Note that IEC 62368-1 uses IEC 60695-11-10 for flammability rating rather than UL 94 and UL 510. There are no specific requirements for fire-enclosure tape. Stay safe, and best regards, Rich From: Charlie Blackham <char...@sulisconsultants.com<mailto:char...@sulisconsultants.com>> Sent: Friday, October 8, 2021 6:25 AM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [EXTERNAL] [PSES] UL 510 Flame retardant tape All Various Kapton tapes are sold as Flame Retardant, some seem to reference UL 94 and others UL 510. The scenario is a product falling under EN 62368-1 and the secondary lithium battery needs a fire enclosure and rather than using the product enclosure, one could be made for the battery using a suitable plastic or manual application of retardant tape. Is there any correlation between UL 510 and UL94 when considering creating a Fire Enclosure for a battery as per Clause M.4.3 ? Best regards Charlie Charlie Blackham Sulis Consultants Ltd Mead House Longwater Road Eversley RG27 0NW UK Tel: +44 (0)7946 624317 Email: char...@sulisconsultants.com<mailto:char...@sulisconsultants.com> Web: https://sulisconsultants.com/<https://nam06.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsulisconsultants.com%2F&data=04%7C01%7Cted.eckert%40microsoft.com%7Ca6e307923eb9431b804a08d98a5f1a71%7C72f988bf86f141af91ab2d7cd011db47%7C0%7C0%7C637692963354416861%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=bDpGeGKKgswxO6hhPR9RaXpY1x1P2RWBVKILs58KSnk%3D&reserved=0> Registered in England and Wales, number 05466247 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
