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  #11  
Old 13-11-17, 14:43
kano nordie kano nordie is online now
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Originally Posted by AllanMcD View Post
Ps we all love the MSA
Allan
Grrrr don't we just
John
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  #12  
Old 15-11-17, 15:20
RennyT RennyT is offline
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Originally Posted by AllanMcD View Post
My manufacturer has contacted the MSA regarding this and I will let you know when I know anything.
Ps we all love the MSA
Allan
Just don't hold your breath waiting on a decision from them.

Allan, have you heard of any Lithium batteries in competition cars bursting into flames?

Is the concern about battery management systems not irrelevant for Hillclimbs and Sprints where many run total loss systems?

I expect that come 2020, they will be requiring all lithium batteries (if not all batteries) to have a special tamper proof MSA sticker attached by a National Scrutineer, at a cost of £3

Sometimes I wonder...
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  #13  
Old 15-11-17, 15:22
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Super B batteries are MSA approved
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  #14  
Old 15-11-17, 15:48
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Originally Posted by RennyT View Post
I expect that come 2020, they will be requiring all lithium batteries (if not all batteries) to have a special tamper proof MSA sticker attached by a National Scrutineer, at a cost of £3

Sometimes I wonder...
That will be a LOT of stickers on a Tesla.................................

JW
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  #15  
Old 15-11-17, 16:18
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AllanMcD AllanMcD is offline
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Originally Posted by RennyT View Post
Just don't hold your breath waiting on a decision from them.

Allan, have you heard of any Lithium batteries in competition cars bursting into flames?
..
I have heard of a Lithium battery failing with a fair bit of heat involved but no flames that I know of.

I dont expect the MSA to help with a problem they have created as there is obviously a brand with a finger in the pie as they already had stickers on there's before the new reg was made public.
Allan
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  #16  
Old 15-11-17, 18:27
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AllanMcD AllanMcD is offline
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Super B batteries are MSA approved
I have contacted the main supplier and they say they are not approved but hope they will be soon.
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  #17  
Old 15-11-17, 19:06
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As I understand, the problem with lipo / lithium ion batteries bursting into flames is only if they're charged too fast and at too high a current (Hence the need for decent battery management systems inside the battery); a situation unlikely to be encountered in normal IC engined vehicles with charging systems, and pretty much zero chance in a total-loss system.

I don't believe the lithium iron phosphate type batteries (which are common in our sport) have this issue.
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  #18  
Old 16-11-17, 09:34
gixxerthou gixxerthou is offline
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Steve, no, it's not the current it's essentially the voltage that's the principle (though not exclusive) issue. However, you're completely right with the battery chemistry, LiFePO4 is what you guys should be looking at. Thermal runaway isn't such a risk.
The charging/chemistry of the various cell types is a story in itself (and hell, yes, I could bore you all), but the inescapable fact is that metallic lithium will plate the anode of most commercial cell chemistries in an overvoltage situation.

I fly a microlight, which (reluctantly) I have fitted a LiFePO4 battery. Reluctance, in this case, being financial. There's an approval list from the BMAA, which is getting longer, and the contents cheaper. The requirement for an isolator, between the rectifier/regulator and the battery, with a voltage gauge (that you can't help watching too much), is an added nuisance. However, Li cells are the present and the future.

Batteries that I can fly with are:

Manufacturer Model
Super B SB12V5200, SB12V7800P
Aliant X3P
EarthX ETX18B
Varley Li-16, Li-5, Li-3
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  #19  
Old 16-11-17, 10:24
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AllanMcD AllanMcD is offline
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[QUOTE=gixxerthou;144353 LiFePO4 is what you guys should be looking at.

[/QUOTE]

Can these batteries crank a cold car ?
Are they ok with a car alternator ?
Allan
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