05-24-2021, 08:12 AM | #491 |
Not Yet Wild
Join Date: May 2021
Posts: 3
|
Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
Awesome info here. Props to the OP for getting this one started.
|
Today | |
Sponsored Links
__________________
This advertising will not be shown in this way to registered members. Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum |
|
05-24-2021, 08:20 AM | #492 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,193
|
Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
It is critical to get the pack in good balance at the high end of their voltage range before doing a full charge. A good BMS will save you $$ in the long run by making your batteries last longer.
|
05-24-2021, 09:16 AM | #493 |
Gone Wild
Join Date: Oct 2012
Location: Southwestern Pa.
Posts: 6,215
|
Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
Since the LV appears to be 2.5V per cell....go less than that and trash your battery.....you are just above "the wire".
I can't speak to the charger as others with more experience will, but if you disconnect the pack from any external sources, the cell charges should remain the same for the time period you are talking about. |
05-24-2021, 09:50 AM | #494 | |
Gone Wild
Join Date: Oct 2019
Posts: 226
|
Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
Quote:
The way you should be looking at it is: "I'm purchasing the BMS, which lithium cells do I want to add to it" Truth be told, you got lucky that the BMS drained your cells. Imagine what would have happened if it failed to protect a cell from high voltage? Not only would use lose your battery, you could lose your golf cart and whatever structure it is parked in. You can screw around with LiFePo4 cells.. all they do is smoke when things go wrong. But when lithium ion goes rouge, really bad things can happen. As DaveTM said, the cost of a good rifle isn't in the rifle, its in the scope. Funny thing, it also applies to photography. As they say "$500 Camera bodies come and go, but the $1500 lenses you buy will be with you forever" |
|
06-01-2021, 01:35 PM | #495 |
Gone Wild
Join Date: Oct 2019
Posts: 646
|
Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
Where is Sergio?
Hope all is well with him. Miss his insight and experience around here... |
06-11-2021, 07:18 AM | #496 |
Gone Wild
Join Date: Oct 2019
Posts: 646
|
Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
|
06-12-2021, 11:42 PM | #497 |
Gone Wild
Join Date: Aug 2016
Location: Prescott, AZ At a really nice Country Cub
Posts: 242
|
Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
fstop I am also worried about him he seemed to have just dropped off the face of the earth. Hope he is ok wish he would just pop in and say “ HI”.
Sent from my iPad using Tapatalk |
06-18-2021, 09:16 AM | #498 |
Not Yet Wild
Join Date: Dec 2020
Posts: 6
|
Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
Hi all, I have a 14s2p Leaf module I'm putting in a resistor cart with the 5 solenoids. Would the relay setup in the first post work with this? And would I connect my key switch in series to one of the K2 terminals?
|
07-06-2021, 07:07 PM | #499 |
Not Yet Wild
Join Date: Aug 2015
Posts: 46
|
Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
I previously ordered all the parts to do this, but the more I look at it, the more I'm convinced that I didn't do the right thing by ordering ALL the parts.
I'm not going to have a built in charger like Sergio, which, according to how I'm looking at the circuit, I won't need Z1, D2, K2 or K3. I believe it's the BMS that directly cuts charging when any cell's voltage goes over the max. All that K2, K3 and their associated circuitry does, as far as I can tell, is protect from excessive current flowing when the charger first gets power. They also keep the charger from seeing the battery voltage all the time, and prevent the small constant drain on the battery by the light in the charger. K1 and D1 are responsible for acting like the keyswitch shutting off if any cell goes undervoltage. I think that's the only part of the circuit I'll need. Can anyone confirm or deny my suspicions? |
07-06-2021, 08:02 PM | #500 |
Gone Wild
Join Date: Apr 2017
Location: SE TN
Posts: 2,227
|
Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
I just built my pack and that's all I did. When the BMS interrupts the 48v to the power supply a relay drops out and opens pin 10 (tan wire) on the controller.
|
|
|
Similar Threads | ||||
Thread | Forum | |||
Yamaha Drive with Lithium Nissan leaf batteries | Lithium Yamaha | |||
DIY 101 - 14 cell Nissan Leaf lithium pack | All things Lithium | |||
Nissan leaf module covers and cover plate | Extreme DC! | |||
A look inside Nissan Leaf lithium battery pack | All things Lithium | |||
Lithium Nissan Leaf conversion x 2 | Lithium Club Car |