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12-18-2014, 04:10 PM | #21 | |
Gone Wild
Join Date: Oct 2009
Posts: 486
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Re: Converting to Lithium
Quote:
Second point is you cannot just go buy a new Leaf Battery pack. You have to have the old pack to trade in. Nissan started selling replacements in 2013 for $5500 to cover their butts for the heat problem failures. Thus why I said Lithium Manganese requires Thermal Management. You cannot buy new Leaf Modules or Cells. You can only buy the whole pack and must have the old pack to trade in. The modules or cells being sold by EV parts dealers are either the packs traded in for replacement, or Nissan stock packs of 2011 and 2012 model years. Dealers have bought the packs for pennies on the dollar and hacked them up to get the modules/cells out of. Buyer beware. |
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12-18-2014, 08:00 PM | #22 |
Gone Wild
Join Date: Sep 2012
Location: Savannah, GA
Posts: 2,760
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Re: Converting to Lithium
Below is my opinion, I am not saying any member here is right or wrong.
I would steer away from a Chevy Volt cells. Not only are they very hard to separate since the cells are spot welded together, they were also liquid cooled as installed in a Volt. The battery chemistry demands liquid cooling. That would be hard to duplicate in a golf cart. I know Nissan leaf had thermal problems and required thermal management. They were designed to be passively (or air) cooled. No liquid cooling here. The housing the Leaf modules are installed in is weather tight, totally sealed. I can understand why they had heat problems in the desert southwest. I feel when the Leaf modules are free air installed, as in a golf cart, they will not suffer the same heating problems. They are also under much less load pushing around a light weight golf cart. For anyone looking at Leaf modules online advertised as new, SunKing is correct, you cannot buy new modules. Everything online are take-outs from something. I got mine from accident Leafs, not factory returns. The battery assembly was not damaged at all. It is very, very stout. |
12-18-2014, 11:29 PM | #23 |
Gone Wild
Join Date: Oct 2009
Posts: 486
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Re: Converting to Lithium
That was the point I was making. You are not buying new batteries. Anything you find online is either factory rejects, returns from failures, or salvaged. You cannot buy new cells or packs, Nissan has exclusive rights. Well you can buy new packs, but you must have one to trade in and own a Leaf.
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12-19-2014, 07:25 AM | #24 |
Gone Wild
Join Date: Jul 2012
Location: Central FL
Posts: 1,195
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This thread has so much great info! Thank you all who are contributing. I'm learning learning learning...
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12-19-2014, 07:56 AM | #25 | |
Gone Wild
Join Date: Sep 2012
Location: Savannah, GA
Posts: 2,760
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Re: Converting to Lithium
Quote:
Now, any cell can fail, new or used. New can fail right out of the box and it happens more then the EV community would like. Folks that run several dozen cells always buy a few extra in case of premature cell failure. Buying used has it's advantage that all but guarantees no premature cell failure on first charge because they are been in a working vehicle for some time. I'm not saying a used Leaf cell will last the 10 years Nissan warranties it for either. I have a extra cell in case of failure. The trick is catching the failed cell early before it becomes a safety hazard. I do this with a cell balance detector circuit that costs less then $10. Here's the link to a simple battery balance alarm that I use. http://www.evdl.org/pages/battbridge.html |
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12-19-2014, 08:43 AM | #26 |
Gone Wild
Join Date: Oct 2012
Location: Southwestern Pa.
Posts: 6,203
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Re: Converting to Lithium
Well.....I figure I have another 2 years before my Trojan's are toast. By then you techno guys will have it "wired" to the point where dummies like me will be able to do it as easy as putting batteries in a flashlight.
I don't need to know all of the down 'n dirty details....I just need to know where the plug goes!! |
12-19-2014, 09:02 AM | #27 | |
Gone Wild
Join Date: Dec 2008
Location: Summerville, SC
Posts: 331
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Re: Converting to Lithium
Quote:
http://hybridautocenter.com/HAC4/ind...new&Itemid=605 |
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12-19-2014, 10:00 AM | #28 | |
Gone Wild
Join Date: Oct 2009
Posts: 486
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Re: Converting to Lithium
Quote:
I know that is not what you want to hear, but that is what is going on with them. The Leaf modules are exclusive Nissan. The public cannot buy the modules themselves. You can only buy the full pack from an authorized dealer, must have a pack to trade in, and own a Leaf. The only other way I know to get around it is do what Sportcoupe did by buying a whole pack from a salvage yard when a Leaf comes in that has been totaled out. First thing the salvage yard does is pull the packs out because they know they are valuable and will turn an instant profit as they are worth a few thousand dollars. Pretty sue Sportcoupe has a thread about his build where he bought a pack at a Salavage yard, tore it apart to harvest the modules and reused in his cart. |
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12-22-2014, 08:31 AM | #29 | |
Gone Wild
Join Date: Dec 2008
Location: Summerville, SC
Posts: 331
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Re: Converting to Lithium
Quote:
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12-22-2014, 09:19 AM | #30 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,087
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Re: Converting to Lithium
These "rejects" may be fine for golf cart use. Much easier on them than a full size electric car. Probably worth it. I hope to get at least two more years out of my FLA batteries in my Yamaha Drive before I look at doing a conversion. I hope by then that there are more options available.
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