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Unread 05-22-2019, 06:08 AM   #31
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Default Re: Lithium conversion basics

Took them apart and put them in the correct order. Wow! I would rather be embarrassed than make a catastrophic mistake. Thanks guys. Still can't believe that I did not see that.
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Unread 05-22-2019, 08:25 AM   #32
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Default Re: Lithium conversion basics

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Originally Posted by MDLNB View Post
Duhh! What in the world is wrong with me? I kept looking at it and looking at it, and thought you all were crazy, until 5am this morning. Old age is really hitting me hard, if I couldn't see that. I used to be able to walk through a field of clover and reach down and pick up four leaf, five leaf and six leaf at a glance. Drove my wife and daughters crazy how I could just walk along, reaching down and picking them up. Now, I missed this simple little configuration. WOW! On the up side, I am sure I got a few laughs at anyone reading this. Well, it's out to the garage to fix it. Unbelievable!
Sometimes the simplest things are the easiest to overlook, happens to all of us. Iím just glad you are on the right track and your modules will be much happier being properly compressed.
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Unread 05-22-2019, 10:49 AM   #33
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Default Re: Lithium conversion basics

LISTEN.....When it comes to questions about a lithium install.....there (IMHO) is no such thing as a stupid question.

If that were the case......my long post during my build would have been shrank down to less than 1 page!!!
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Unread 05-22-2019, 11:12 AM   #34
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Default Re: Lithium conversion basics

Very cool!
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Unread 05-22-2019, 11:28 AM   #35
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Default Re: Lithium conversion basics

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Originally Posted by Furyous View Post
The controller and motor donít care what the chemical makeup of the batteries are. Set it up like a lead acid cart.
The battery itself needs to be its own ecosystem, and the only connection to the standard cart is the main positive and negative.
The BMS is your best friend. Get one of the ones from Zeva. Ian and the team there are great. Get one of their systems and go maintenance free. It just works and their touchscreen is cool too.

Once you have those things in your head, get going.


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See this is what i needed to hear

My CC is pretty straight forward with battery stuff.. and if i could put some lithium or Lipo batteries in it that would be decent.. I just get lost looking at all these wires and "BMS" **** yall always talk about.. its confusing lol

I have 8 6v batteries on my cart and i can literally drive it about 40miles before i get down to 49v (60ish%)
So im not sure if i want to get rid of what i know works
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Unread 05-22-2019, 12:48 PM   #36
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Default Re: Lithium conversion basics

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Originally Posted by Gallachera89 View Post
See this is what i needed to hear

My CC is pretty straight forward with battery stuff.. and if i could put some lithium or Lipo batteries in it that would be decent.. I just get lost looking at all these wires and "BMS" **** yall always talk about.. its confusing lol

I have 8 6v batteries on my cart and i can literally drive it about 40miles before i get down to 49v (60ish%)
So im not sure if i want to get rid of what i know works
If it ain't broke......why fix? If your looking at battery replacement because your existing pack is on it's last legs......then maybe.
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Unread 05-22-2019, 01:32 PM   #37
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Default Re: Lithium conversion basics

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Originally Posted by MDLNB View Post
Took them apart and put them in the correct order. Wow! I would rather be embarrassed than make a catastrophic mistake. Thanks guys. Still can't believe that I did not see that.
We've all been there, done that with our projects... it's just some of us catch it before we post it, and some are willing post it so others can catch it before they end up in the been there done that category....

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Unread 05-22-2019, 01:54 PM   #38
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Default Re: Lithium conversion basics

Now, I am waiting for my BMS and charger to be delivered (from China). I want to try the lithium pack in my CC before I start tearing it down to use the parts on my next project. I understand that the charger is voltage and current adjustable, do I do want to NOT fully charge them to the max voltage. I did learn that much so far. Charge at a lower level, make the pack last longer, from what I have gathered. Thanks again.
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Unread 05-22-2019, 03:29 PM   #39
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Default Re: Lithium conversion basics

Yes, in essence, charging at a lower amp rate and not charging the cells to full capacity will extend cell life.
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Unread 05-22-2019, 10:56 PM   #40
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Default Re: Lithium conversion basics

From what I've read on the BatteryUniversity.com site even letting the battery sit unused, but charged to over 4.10vpc will cause electrolyte oxidation on the cathode, which diminishes capacity. The damage is much more pronounced at higher temperatures. This damage can be much greater than the damage caused by cycling a battery. Battery cycling causes the electrolyte interface to thicken on the anode and will eventually form an insulating layer preventing the movement of electricity. If you want to get the longest lifespan, do what NASA does in the satellites and charge to 3.92vpc... You'll need a lot of amp hours though as 3.92vpc leaves a LOT of capacity unused. So you'll have to look for a balance, just like everybody else here.

Basically it's the opposite of lead acid. Leave lead acid too low for too long and it's worthless. Leave lithium charged too high for too long (in a hot environment) and it's worthless.

If you get bored and want to read something that is just interesting enough to keep you reading for an hour too long, head to BatteryUniversity.
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