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Battery Care.

Battery Care.

Old 05-14-2004, 08:34 AM
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Default Battery Care.

I am new to electric racing and wanted to get some tips on battery care.

What can I do to extend the life of my batteries?

What can I do to maximize performance?

Thanks in advance.
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Old 05-14-2004, 11:33 AM
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Make sure to cycle your batteries.
Keep your batteries kool.
Peak your batteries before racing them.
Let the batteries cool off completely before charging them
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Old 05-14-2004, 12:09 PM
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Originally posted by RedBullRacin
Make sure to cycle your batteries.
Keep your batteries kool.
Peak your batteries before racing them.
Let the batteries cool off completely before charging them

When you say cycle, do you mean discharge them prior to charging them? If so, does a regular discharger work? Or, would a discharging tray be better?


Also, do I need to let the batteries cool before I run them? They can be pretty warm right after they peak.
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Old 05-14-2004, 12:54 PM
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One cycle means one fully charge followed by a full discharge.

But I'm not sure that's what he meant.

Battery care depends a lot on if it's NiCd or NiMh. But I assume, that you're talking about NiMh.

That said, for GP3300, this works well:

Charge at 5-6 amps. 5-8 mV cut off pr. cell. No trickle. 5 amps will give sligthly more runtime, while 6 amps will more punch but a little less runtime. Probably 5 amps will make the packs last longer.

You can run them imidiately after a full charge - actually, they perform best, while still warm.

Either run the pack untill the ar slow down, or discharge the rest out of them down to 0,9 volt pr. cell. That equals 5,4 volt for a 6 cell pack.

Either race them or store them in this state.

Right before the next use, you might want to equalize them, but you dont need to. Equalizing gives more unch and better voltage and also seems to improve life span.

If you do equalize them, get a equalizer with auto cut off, if you want to be on the safe side.

Never use a fan, they like natural cooling.

Never charge a hot/warm pack. 1,5-2 hours cooling gives good results.

You can also check some of the matchers tips: http://www.fukuyamaracing.com/page3.html
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Old 05-14-2004, 01:16 PM
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This is great info. Thanks

What brand of equalizer would be recommended? Is an equalizer the same as a discharging tray?
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Old 05-18-2004, 07:43 AM
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........

Last edited by cr250; 10-19-2013 at 08:43 AM.
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Old 05-18-2004, 12:17 PM
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Originally posted by cr250
There is a good articcle on battery care at SPC
Good link, thanks.
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Old 05-18-2004, 01:10 PM
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The most important thing to remember about battery care is that "batteries like consistancy!!" If you charge at 5 amps run for 5-6 minutes and discharge @20 down to 5.4 or .9 per cell right after your race/run then you should always do that. Consistancy if the best thing you can do for your batteries.
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Old 05-18-2004, 01:48 PM
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Originally posted by cr250
There is a good article on battery care at SPC
I'm wondering, SPC seems to be (almost) the only one to recommend partial charging GP-cells, if storing for more than a week???
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Old 05-18-2004, 04:15 PM
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........

Last edited by cr250; 10-19-2013 at 08:44 AM.
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Old 05-19-2004, 03:58 AM
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CR250, I do understand that part, but many other matchers recommend to NOT do the partial charge rate thing - even not for months. And that's what confuses me.
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Old 05-19-2004, 05:37 AM
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........

Last edited by cr250; 10-19-2013 at 08:47 AM.
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Old 05-19-2004, 07:36 AM
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Thanks, that was a good link. According to this, the amount of charge dont matter much, but temperature and time matter way more. The explanation sounded reasonably, so I tend to believe it.

In short, stored at normal room temperature, the NiMh cells can be stored at leastl 90 days, regardless of charge state. At this point, it's a good idea to do a full cycle.

I've also concluded that many apsects of battery care, seems to depend on believe.

As a general rule of thumb, I find that the more stress you put on the cells, the better the performance will be - even though it's often about marginals. The price is usually battery life span. So the idea is to find a compromise, where I'm satisfied with both performance and overall budget. Sometimes convience matter too.

I also believe, the battery care SMALL DETAILS aint THAT important, since different matchers have different recommendations for the same batteries, for the moment, the GP3300.
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Old 05-20-2004, 07:35 PM
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Ok, so you dont have to have a discharger to run the batts well?
Is a discharger just something thats reccomended, and can you just run your car till the batts run down instead of discharging?
Oh, and what is a discharge machine thing. Does it just uncharge the batts to a certain set limit.

Thanks,
EvoV
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Old 05-23-2004, 07:10 AM
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run your car till its slow...then sit the car on a brick or something and let the wheel spins in the air...get something to hold the thottle and let the car wheel spin all the power out...took like 10 mins for me this morning...no power to move wheels...my ss5800 esc was detecting a jam... LOL...
and the steering servo was half as slow...so yeah...
wait for battery to cool...and charge again...
i've only got 1 2400mah nicd atm...so i just drive the car till its really slow...then let the battery cool...i don't have any other methods of discharging.
hmm
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