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-   -   Club Car DS lithium upgrade and 4-Link (http://www.buggiesgonewild.com/all-things-lithium/145679-club-car-ds-lithium-upgrade-4-link.html)

Sergio 10-30-2018 05:02 PM

Re: Club Car DS lithium upgrade and 4-Link
 
Quote:

Originally Posted by NoleFan4Ever (Post 1554891)
NCPW/Sergio- If either one of you happen to stumble across a way to adjust the 58.4 volt chargers we got from EV Battery Center let me know. I checked with Nelly and she said they are ordered that way and they do not know how to adjust the dead-band on them.....

Unless there is an adjustment trim-pot like NCPW mentioned, the only other simple solution I can think of to lower the output voltage is to use a 50 amp bridge rectifier like you find in some chargers inline with the charger output.

You have the option to reduce the final voltage by 0.7v or 1.4v depending where you tap the bridge.

That is why I like the CAN control to set the charger output voltage.

The only way to TOP balance the pack using a BMS is if the "Cell Balancing Voltage" is equal to the "Charger Voltage"/"Number of Cells" but the "Max Cell Voltage" is a higher value.

If You use the HV relay to stop the charging at a lower voltage than the charger output, there is no practical way to balance the pack since the charging will stop as soon as the first cell hits the "Max Cell Value" regardless of how many cells are lagging behind in voltage.

Using CAN control You can have a daily charging at a much lower voltage to reduce stress in the pack and easily adjust to a higher final voltage for "long range" use if needed.

Edit: Actually using the method above to lower your charger voltage to 57 volts would be a good idea as well if You don't need the range for daily driving.

NoleFan4Ever 10-30-2018 09:33 PM

Re: Club Car DS lithium upgrade and 4-Link
 
Quote:

Originally Posted by NCPW (Post 1554895)
Will do. :thumbup:

I remember reading one time the QuickCharge lithium chargers (which were set by the manufacturer to whatever desired voltage you requested) could be adjusted by a very small pot under the housing using minute turns in either CW or CCW rotation.

I wonder if ours could be adjusted the same way? I haven't opened mine up to find out.

If I venture in, I will see and let you know.... :thumbup:

NoleFan4Ever 10-30-2018 09:37 PM

Re: Club Car DS lithium upgrade and 4-Link
 
Quote:

Originally Posted by Sergio (Post 1554939)
Unless there is an adjustment trim-pot like NCPW mentioned, the only other simple solution I can think of to lower the output voltage is to use a 50 amp bridge rectifier like you find in some chargers inline with the charger output.

How about for raising it - any ideas there. I would like to get the 58.15v up to 58.4v (or as close as possible). I just feel like I am leaving potential on the table, although it is only .25 volts.... (I know, I know...:wink:)

ag4ever 10-31-2018 08:23 PM

Re: Club Car DS lithium upgrade and 4-Link
 
Quote:

Originally Posted by Sergio (Post 1554773)
The SOC should not reset at sleep since the BMS is still active, that may be an email to Zeva to clarify.

Well, trick-or-treat did not go well. One house and we were terrified.

But I was able to confirm that putting Zeva to sleep and waking her resets the SoC.

Tried uploading the video, but it is not a supported file type. Will need to upload to YouTube or something.

NCPW 10-31-2018 08:39 PM

Re: Club Car DS lithium upgrade and 4-Link
 
When I turn my zeva off and then back on, mine resets to 50%. But when I start riding it goes back to whatever percentage it was before I turned it off.

NCPW 10-31-2018 09:02 PM

Re: Club Car DS lithium upgrade and 4-Link
 
First time really trying the lithium pack out tonight.

I also took the kids trick or treating tonight. Starting voltage was 57.9v and ending voltage was 55.2v. Moderate hills and all pavement driving with 3 adults and 2 kids under 45lbs riding. Total mileage was 5.5 miles.

NoleFan4Ever 10-31-2018 09:36 PM

Re: Club Car DS lithium upgrade and 4-Link
 
Sounds about right. They (kids) just got back at 9 with mine and it was 58.15 when they left and 55.6v when they returned. GPS said 4.7 miles and that was with 3 adults and one child. Mostly flat terrain but a lot of stopping and going.

NCPW 10-31-2018 09:53 PM

Re: Club Car DS lithium upgrade and 4-Link
 
Glad to hear I'm right where I should be. :thumbup:

Doughboy305 11-01-2018 09:33 AM

Re: Club Car DS lithium upgrade and 4-Link
 
Ordering the charger from alibaba and there asking me the following question does this seam right for the 7 lead modules. Thanks for your reply.
I thought you have 28 cells in total for your battery pack( 14 series 2 parallel), am I right about this?

NCPW 11-01-2018 09:54 AM

Re: Club Car DS lithium upgrade and 4-Link
 
Quote:

Originally Posted by Doughboy305 (Post 1555514)
Ordering the charger from alibaba and there asking me the following question does this seam right for the 7 lead modules. Thanks for your reply.
I thought you have 28 cells in total for your battery pack( 14 series 2 parallel), am I right about this?

No, my pack has 14 cells (2s2p). If I doubled my pack to 14 modules to double my ah rating, then it would be 28 cells. Hope this helps.


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