Cooked battery

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BasilF
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Cooked battery

Post by BasilF » Tue Aug 18, 2020 6:26 pm

I went for my first long ride today and had to turn back early due to a misfire. Got home and found the battery was boiling. The battery was known to be quite old and not well charged before the ride. I have a podtronics rectifier regulator fitter but no 2MC capacitor. I've fitted a voltmeter and the podtronics seems to keep the charging voltage at 14.5volts when the engine is revving which seems a bit high for a charged lead acid battery. I thought old batteries generally refused to take charge rather than taking lots of current and boiling. Any suggestions?

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Re: Cooked battery

Post by minetymenace » Tue Aug 18, 2020 6:53 pm

Lead acid should charge about 2.275 v/cell or 13.65v for a 12v block (not accounting for temperature). Your meter is probably reading some ripple as well. New battery and check the voltage again, all should be well.
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Re: Cooked battery

Post by skippy » Wed Aug 19, 2020 12:35 am

I have found that the podtronic charges at 14.5V which is higher than the Zenor. Using the headlights seems to help a bit.
What other recregs do others use and what voltage do they regulate at??
Doug
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Re: Cooked battery

Post by BasilF » Wed Aug 19, 2020 1:27 pm

Trawling through YouTube, 14.5volts seems a very common voltage for motorcycle rectifier/regulators. There also seems to be consensus that about 14volts is the maximum that should be fed to a fully charged lead acid battery if you aren't going to damage it eventually. I can't see a satisfactory solution to this so I'm buying a YB9-FP JMT Lithium ion battery which is happy up to 14.9volts. I've got one of these in a microlight and its been completely trouble free for the last two years.

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Re: Cooked battery

Post by Jeff K » Wed Aug 19, 2020 2:40 pm

I had issues using LI-ON batteries in the past, two in a 850 Norton and one in 750 Triumph. After many conversations with the company, it was determined that they do not play nice with either the Podtronics or the stock charging systems. The Manufacture recommended a charging system that was designed for LI-ON batteries.
Here is a link to a older discussion about them.
https://www.triumphrat.net/threads/lith ... ery.223944

Most people that I know ether love them or hate them. Last bike that I had problems with was a 850 Norton, new Lucas hi out put alternator, new Podtronics, Battery would go flat in a couple of days of sitting, check all wiring, did volt meter in line while bike was off, no voltage. So it was the battery, the company replace and we had the same problem. The company then stated that the Lithium was not compatible with the old British charging system. And refunded our money. This was two years ago.
I would do lots of web searches before I spent the extra money on one again.
Jeff

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Re: Cooked battery

Post by beat » Wed Aug 19, 2020 9:04 pm

Hmmmmmmm <201 :?: <201

I do use something the like from SHIDO, the generator is a Sparx , bought from Ed Valiket.
have had once a brocken Rectefier , but no problems with this LI battery .

beat <201 <201

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Re: Cooked battery

Post by minetymenace » Wed Aug 19, 2020 10:30 pm

Zeners do not have a precise cut off, it is a curve and depends on the current through the zener and the temperature, but it has worked on bikes for decades and it will do me for most applications, but there are better ways of doing things now....
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Re: Cooked battery

Post by skippy » Thu Aug 20, 2020 4:25 am

The secret to lithium batteries is the bms it comes with, the bms does all the regulation and balancing.
I have a lithium starter battery in my ute and it cranks it a lot faster than the lead acid battery. It sit around 13.6V when stopped.
Doug
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Re: Cooked battery

Post by Barry Creary » Thu Aug 20, 2020 6:04 am

What did the battery cost if you don’t mind me asking Doug
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Re: Cooked battery

Post by skippy » Fri Aug 21, 2020 1:52 am

Barry Creary wrote:
Thu Aug 20, 2020 6:04 am
What did the battery cost if you don’t mind me asking Doug
$668 The reason i tried it is because the fridge would get left on and drain down the battery which lowered the capacity and soon i would have no capicity to use the fridge and starting would be a problem if i left the ute for sometime. The lithium can be drained down to 12.8V and not degrade the battery at all.
Doug
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Re: Cooked battery

Post by BasilF » Fri Aug 21, 2020 11:09 am

Solved. A heat shrinked part of the positive battery lead was close to the battery carrier and touched it due to vibration when the bike was pulling at low revs. The battery carrier is rubber mounted but obviously touches the frame somewhere because it is connected to earth. Once the heat shrink and powder coating had worn through there was an intermittent short circuit when it vibrated hence the misfiring and the hot battery. Still going to fit the Lithium battery as it has a better arrangement of terminals which will keep them further from the frame.

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Re: Cooked battery

Post by beat » Fri Aug 21, 2020 8:46 pm

BasilF wrote:
Fri Aug 21, 2020 11:09 am
Solved.
:thumb :thumb :ok :ok <200 <200

&lt;069 &lt;069

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