10-08-2020, 09:13 AM | #331 | |
Not Yet Wild
Join Date: Jul 2015
Posts: 53
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Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
Quote:
EDIT: I just found this charger that looks again to be the same, but this one has a better picture of the circuit board and it looks to be extremely similar yours with the VR2 pot and the shipping is only $6.32, so $94.32 total. It even says it has "earthquake resistance"! |
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10-08-2020, 09:49 AM | #332 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
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Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
That looks very similar to what I have plus the all important "earthquake resistance" feature
The small BMS (20 amps minimum) with Bluetooth module is still a good option. PingEye3 on post #301 has a link to a nice complete drawing showing the charger negative going through the BMS C- terminal |
10-22-2020, 06:18 PM | #333 |
Not Yet Wild
Join Date: Jul 2015
Posts: 53
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Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
The charger showed up today! 2 weeks from date of order on Ali. Was trying go figure out what voltage to set it at. I have a series cart, so no regen to worry about. I was thinking 4.1v per cell, so 57.4vdc. Seem reasonable? Too aggressive? Too conservative?
Its 53.3vdc out of the box Edit: I can't get the voltage above 53.3. I checked it with 2 different meters (one being a Fluke). I can get it to go down, but it won't rise. Its on the bench not hooked to anything. Board is extremely similar to yours. Potato pic from tablet |
10-22-2020, 07:12 PM | #334 |
Gone Wild
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 9,329
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Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
That voltage table listed on the link you provided is confusing but it could just be poor Chinese translation.
That trim-pot near the LEDs should be the correct one, Did You try charging the pack yet just in case that particular charger has a higher output when loaded? Keep the fluke voltmeter on the pack during the first charge. |
10-22-2020, 07:43 PM | #335 | |
Not Yet Wild
Join Date: Jul 2015
Posts: 53
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Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
Quote:
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10-26-2020, 05:41 AM | #336 |
Gone Wild
Join Date: Mar 2019
Posts: 323
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Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
My pack is set at 58.3v. I will get between 58v and 58.3. My cell voltage is 4.19 balanced v is 4.17. Been running this for 2 years.
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10-26-2020, 11:24 AM | #337 |
Gone Wild
Join Date: Jan 2015
Location: Seminole Country
Posts: 836
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Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
If you have a non-Regen series cart, I believe it's OK at 58.3V. Regen carts need a little top room for Regen with a full pack.
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10-26-2020, 04:06 PM | #338 |
Getting Wild
Join Date: Jul 2020
Location: Davisburg, MI
Posts: 98
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Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
My experience is any charge over 57V disappears really fast. Like to my barn and back. Rumor is those extra few hundredth of a volt do have a significant impact on battery life (25%?). So 3% more runtime at the expense of ~25% battery life. I've settled on 4.08-4.09V cell range. 55.x V is where my cart spends half its run time.
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10-26-2020, 04:24 PM | #339 |
Gone Wild
Join Date: May 2012
Location: Rio Verde, Az
Posts: 7,121
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Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
I keep all of my cells at or below 4.1V at max charge. That is about 95% capacity. I turned the voltage down on my charger to accomplish this.
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11-07-2020, 07:49 PM | #340 |
Not Yet Wild
Join Date: Apr 2010
Posts: 41
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Re: Basic Nissan Leaf 7 module Lithium setup with Generic Chinese BMS
I am so jealous of you guys. I've tried to make sense of all these diagrams and instructions, but I guess i'm just dumb.
Any videos you guys can recommend that does this? I have purchased 6 of those Leaf modules and was thinking of hooking them up to my 2017 Precedent Club Car. Then I start reading about how to bypass to OBC, regening , needing a new charger for the lithium batteries and hooking up the BMS and my brain exploded. Maybe a video would ease the pain? |
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