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| Safest batteries allowed for transport by air |
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| ricko_uk:
Hi, we are designing a portable tester which the client requires to be safe & allowed for transport by air. Because the equipment has to run for up to 10 hours the battery need to be up 20Ah (the size of a phone-sized battery pack). The battery pack is fixed inside the enclosure so the battery cannot be removed. Do you know which type is the safest? What types of tests and certifications are required? Do you know where I can find any docs/infos about this? Thank you :) |
| wraper:
Transport by courier or with person? If by person AFAIK you can take up to 100Wh Lithium battery. If by courier I think power limit is the same but battery must be discharged <30%, package properly marked and also particular courier should want to deal with them. Some stupid couriers simply refuse any batteries altogether. |
| reboots:
Disclaimer: the following information relates to the USA, and might not hold any relevance for your location. I can't answer your question about tests and certification, but perhaps the regulations governing what you can transport by air would be a starting point. For transport by the client on US air carriers (as opposed to shipping), a battery contained within equipment is limited to 100Wh. You didn't mention the required battery voltage, but 100Wh / 20Ah = 5V. A 3.7V nominal Li-Ion pack would be 74 Wh; no problem. Further reading: https://www.faa.gov/hazmat/packsafe/more_info/?hazmat=7 Based on British Airways restrictions, the UK may have similar limits. https://www.britishairways.com/en-gb/information/baggage-essentials/liquids-and-restrictions# For shipping lithium batteries contained in equipment, see international standard UN3481, PI967. This mandates the same 100Wh limit for the battery. (Or maximum 20Wh per cell). http://www.dhl-usa.com/content/dam/downloads/g0/express/shipping/lithium_batteries/lithium_ion_batteries_regulations.pdf I deal with custom equipment assemblies which contain a li-poly pack and are carried internationally. I have heard of incidents where customs agents asked for visual confirmation that the pack was disconnected, and in some cases, wanted to see an insulating plug installed so that the pack could not be connected accidentally. Depending on the level of integration in your product, adding this type of measure might be a good idea. My personal opinion is that cylindrical Li-Ion cells are safer for this type of application than prismatic Li-Poly packs, having better protection against mechanical shock and stress. Unfortunately they are heavier, and use space less efficiently, so they're less preferred for portable equipment. |
| ebclr:
It's not easy in today's freight to have rechargeable battery transported in wholesale quantities, I have a lot of issues on the freight company door, especially in China, They really don't understand what is safe and what is dangerous and ask a lot of things and costly paperwork even for a simple mouse NI-MH battery, This is more critical for air shipping, But even on sea shipping have some issues. This depends a lot of with shipping company you are using, some don't permit nothing, others do not care and are very permissive. It's a very stressful thing if you want to play in the right way. Be ready to handle a lot of paperwork |
| ricko_uk:
Thank you all for all the inputs, much appreciated!! :) :) |
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