06-24-2021, 04:45 PM | #21 |
Gone Wild
Join Date: Oct 2012
Location: Southwestern Pa.
Posts: 6,214
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Re: Lithium Pack Build Questions
The reason I bought the ELCon charger is the convenience of having it on-board all the time. Just plug in a 110V extension cord and charge the pack. The ElCon charges at 15amps so it's not a "forever" time period.
As much as I use the cart it's just worth it (for me) to have a higher amp charger. FWIW |
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06-24-2021, 08:21 PM | #22 |
Not Yet Wild
Join Date: Jun 2021
Posts: 11
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Re: Lithium Pack Build Questions
I wonder if I box like this wold work?? Little pricey buy ill keep looking. Please let us know how those battery's work as I might go this same route.
https://www.etrailer.com/Battery-Box.../TLA7708R.html |
06-25-2021, 06:35 AM | #23 |
Gone Wild
Join Date: Oct 2012
Location: Southwestern Pa.
Posts: 6,214
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Re: Lithium Pack Build Questions
That's really pricy. Why don't you build one using "L" channel and steel plate? Search the forum as other's who have converted to lithium have built 'em. You need a drill. A small hobby drill press would be very handy.
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06-26-2021, 11:45 AM | #24 |
Not Yet Wild
Join Date: Jan 2021
Posts: 12
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Re: Lithium Pack Build Questions
So far I have 8 miles on the lithium pack. Pretty much all of it wide open throttle and .5-1 mile rides at a time. Pack voltage is 39.6v at idle and under load 38.5v At idle cell voltage diff is .009. I'm not sure if I'm happy with the JBD bms, right now it's not showing remaining ah. Thinking about buying a Daly.
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06-28-2021, 09:34 AM | #25 | |
Not Yet Wild
Join Date: Jun 2021
Posts: 11
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Re: Lithium Pack Build Questions
Quote:
Hey Pat can you elaborate on this a bit more? Are you talking about amperage draw? I purchased a built pack from a local company and the BMS cuts off as soon as a hit the throttle on my cart with a Alltrax controller. (I assume I am pulling to many amps and the BMS is protecting the battery's) The company said the BMS in the pack was rated to 130 amps. But no matter how slow I pushed the peddle it would reset the BMS. I turned the amp draw down on the alltrax but then the cart would barley move. Can someone explain how you use a low Amp draw BMS in my situation? |
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06-28-2021, 09:58 AM | #26 |
Not Yet Wild
Join Date: Jun 2021
Posts: 11
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Re: Lithium Pack Build Questions
I am seriously considering building a pack like BigzB. It sounds like everyone that makes them. Extreme team, Roy Pow, Etc ect is back ordered or waiting on parts or shipments to arrive. This would be for my 36 volt 4 seater cart with stock motor and controller.
Same battery's BigzB ordered. Just watching to make sure hes happy with them before I drop the $. https://www.alibaba.com/product-deta...2ce83e5ft0wqfe Daly BMS off amazon https://www.amazon.com/DALY-LiFePO4-...xpY2s9dHJ1ZQ== Ill probably find or make a box to hold it all. Would like to get the battery's and BMS enclosed if I am spending almost $2k to build this. Still trying to find a good reliable charger. I do like the idea of keeping it onboard if I have room. This way it can be charged anywhere if the cart runs out of juice. |
06-28-2021, 10:05 AM | #27 | |
Not Yet Wild
Join Date: Jun 2021
Posts: 11
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Re: Lithium Pack Build Questions
Hey Dave,
Can you share what model your using? I see they have many different models and the prices are all over the board as well. I am looking for a charger for my 36v and 48v carts. Both Lithium set ups. Quote:
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06-28-2021, 12:56 PM | #28 | |
Not Yet Wild
Join Date: Jan 2021
Posts: 12
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Re: Lithium Pack Build Questions
Quote:
This is the BMS you want, https://www.amazon.com/DALY-LiFePO4-.../dp/B0876JZ62R I would interested to see the inside of the lithium packs you currently have. You might be able to re-use the cells and just buy a new BMS. Does this pack have bluetooth? If it does you should be able to see errors and why it's cutting out. I'm at 11 miles now and pack voltage is 39.5v. The big test will be this weekend when we take it to the lake. We'll see if it will last 4 days of driving around with some decent hills. |
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06-28-2021, 01:38 PM | #29 | |
Gone Wild
Join Date: Oct 2012
Location: Southwestern Pa.
Posts: 6,214
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Re: Lithium Pack Build Questions
Quote:
$225 plus $80 shipping according to the web site |
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06-28-2021, 06:25 PM | #30 |
Gone Wild
Join Date: Dec 2020
Location: Melbourne, Australia
Posts: 1,942
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Re: Lithium Pack Build Questions
Hi Booshy68,
Everything you need to know is in the thread I linked to but simply, the BMS is only used to disconnect the key switch on low voltage conditions. The main high current cables from the controller are connected directly to the battery pack, bypassing the BMS so there’s no high current protection. Reusing the cells in your existing pack is a possibility but you’ll need to ensure that they are capable of supplying the currents that your motor/controller will be drawing. The Eve cells you linked to on Alibaba may or may not be adequate. They are very good cells but their maximum continuous current is only 1C (105A) with a 30 second peak of 3C (315A). You’ll need to decide if they are up to the task in your application. Cheers Pat. |
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