UK Karting - Notice Board (2-Stroke Karting) : Re: exploding TAG TKM battery

Notice Board (2-Stroke Karting)

Re: exploding TAG TKM battery
Posted by 'SimonS' on 21 Dec 2014 @ 11:00

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SimonSJoined: December 2004
Total Posts: 4
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OK, I had not realised that TKM provided a LiPo battery for starting.

LiPo batteries can present big problems

"● NEVER allow LiPo batteries to overheat at any time!
Batteries which exceed 140°F [60°C] during charge can and USUALLY WILL become damaged physically and possibly catch FIRE!! If a battery becomes overheated, disconnect it from the charger immediately. Do not reuse
it if you suspect it has been damaged in any way."
http://manuals.hobbico.com/dtx/dtxz1804-lipo-handling.pdf

Again I haven't looked at the TKM starter, but uually when a starter stays engaged it is becAuse the Bendix has failed to withdraw after starting. There are all sorts of reasons for this, weak spring, roughened teeth, dirty withdrawal track, overthick or contaminated lubricant and so on.

The problem is that a starter, driven by the engine, becomes a generator. So it is quite possible to feed current back to the battery (there are too many design variables to say how much) from a 'stuck' starter. Of course the circuitry should be designed to prevent it getting to the battery, especially as it seems LipO's are quite selective about their charging regime but.....

Message Thread:

exploding TAG TKM battery by 'nichop' (20 Dec 2014 @ 18:31)

Re: exploding TAG TKM battery by 'GlennGuest23' (20 Dec 2014 @ 19:40)

Re: exploding TAG TKM battery by 'SimonS' (20 Dec 2014 @ 22:00)

Re: exploding TAG TKM battery by 'nichop' (20 Dec 2014 @ 22:44)

Re: exploding TAG TKM battery by 'SimonS' << You are here!

Re: exploding TAG TKM battery by 'alanrr' (21 Dec 2014 @ 17:22)

What sort of battery does Rotax use ? by 'nichop' (21 Dec 2014 @ 20:44)

Re: What sort of battery does Rotax use ? by 'alanrr' (21 Dec 2014 @ 21:29)

Re: What sort of battery does Rotax use ? by 'iant' (21 Dec 2014 @ 22:38)

Re: What sort of battery does Rotax use ? by 'AndyOxfordshire' (21 Dec 2014 @ 23:07)

Re: What sort of battery does Rotax use ? by 'CountWill' (22 Dec 2014 @ 14:05)

Re: What sort of battery does Rotax use ? by 'alanrr' (22 Dec 2014 @ 22:00)

Said he by 'bt3962' (23 Dec 2014 @ 9:39)

Re: Said he by 'nichop' (23 Dec 2014 @ 13:47)

Re: Said he by 'nichop' (14 Jan 2015 @ 20:09)

Re: Said he by 'alanrr' (23 Dec 2014 @ 17:24)

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