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-   -   LiFePO4 Battery Charger (https://www.buggiesgonewild.com/showthread.php?t=170539)

flyons78 10-28-2020 05:16 PM

LiFePO4 Battery Charger
 
Before I do something dumb.... Any reason why I couldn't use my EVBatteryCenter charger from my old Nissan Leaf pack (from Nick) on my new set of LiFePO4 batteries?

S-N-R Customs 10-29-2020 04:56 AM

Re: LiFePO4 Battery Charger
 
There are a couple of electrical gurus on here that will be able to explain it better.... but to my understanding the charging algorithms inside the chargers are different between Li-on and Li-po
Could you use it? Probably. Would it shut off at the right point? That’s the question.


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NCPW 10-29-2020 06:34 AM

Re: LiFePO4 Battery Charger
 
I'm almost positive Nick used the same kind of charger that can be purchased easily on Amazon now that has a trim pot inside that can be adjusted to lower the final output voltage.

The charger should look like this: https://www.amazon.com/Electric-Char...ithium&sr=8-15

Adjust the finally output voltage using a multimeter with the leads attached to the charger output cable and slightly turn the trim pot within the charger until the final output is where you want it.

flyons78 10-29-2020 08:19 AM

Re: LiFePO4 Battery Charger
 
Quote:

Originally Posted by NCPW (Post 1775626)
I'm almost positive Nick used the same kind of charger that can be purchased easily on Amazon now that has a trim pot inside that can be adjusted to lower the final output voltage.

The charger should look like this: https://www.amazon.com/Electric-Char...ithium&sr=8-15

Adjust the finally output voltage using a multimeter with the leads attached to the charger output cable and slightly turn the trim pot within the charger until the final output is where you want it.


Yeah, that pretty much looks like it. Nick has a sticker\label on it saying 700w\50v\11a, so I'm assuming it can be adjusted. I will crack it open and have a look.

simicrintz 10-29-2020 09:24 AM

Re: LiFePO4 Battery Charger
 
I read this in the Q&A's on Amazon, if it is of any help:

Qyestion: Is there a trimpot to adjust the voltage? I would like it to go down to 56.7v
Answer:Sorry, the charger output voltage is not adjustable


Question:Will it work with lifepo4 packs?
Answer:Thanks for your question, this charger can not charge LiFePO4 battery.

flyons78 10-29-2020 10:42 AM

Re: LiFePO4 Battery Charger
 
Quote:

Originally Posted by simicrintz (Post 1775708)
I read this in the Q&A's on Amazon, if it is of any help:

Qyestion: Is there a trimpot to adjust the voltage? I would like it to go down to 56.7v
Answer:Sorry, the charger output voltage is not adjustable


Question:Will it work with lifepo4 packs?
Answer:Thanks for your question, this charger can not charge LiFePO4 battery.

Thanks for checking that! I read that too, which leads me to believe I need to get a new charger specifically for lifepo4.

With that being said, anyone have a lifepo4 charger to recommend?

Sergio 10-29-2020 11:20 AM

Re: LiFePO4 Battery Charger
 
That is not what that means...

There is no difference in "Algorithms", they both use a CC/CV algorithm.

The difference is the final voltage and that answer is because 58v is too high for a LiFePO4 pack.

Since there is not an external knob to adjust the voltage, the only reasonable answer from a Seller is "they are not adjustable" since they don't want people opening the box and screwing things up.

There are other answers on that same question from folks that changed the voltage without issues.

The "UZ-" chargers are not adjustable since a few members here tried.

The YL-600 and the UY-600 should adjust.

Just make sure the charger is not connected to the pack when you adjust.

Post a picture of the inside of the charger so we can see the trim-pot arrangements of your charger.

Mark or take a close up picture of the existing trim-pot positions and count the turns in case You adjusted the wrong one and need to put it back.

PingEye3 10-29-2020 12:04 PM

Re: LiFePO4 Battery Charger
 
Quote:

Originally Posted by flyons78 (Post 1775485)
Before I do something dumb.... Any reason why I couldn't use my EVBatteryCenter charger from my old Nissan Leaf pack (from Nick) on my new set of LiFePO4 batteries?

Just curious, why are you replacing your leaf modules?

flyons78 10-29-2020 01:02 PM

Re: LiFePO4 Battery Charger
 
Quote:

Originally Posted by PingEye3 (Post 1775777)
Just curious, why are you replacing your leaf modules?

I ruined them a year or so ago from over discharge. I got injured and wasn't able to touch my cart for a stretch of time. Pretty bummed about it but finally getting it back up and running.

flyons78 10-29-2020 01:14 PM

Re: LiFePO4 Battery Charger
 
3 Attachment(s)
Quote:

Originally Posted by Sergio (Post 1775763)
That is not what that means...

There is no difference in "Algorithms", they both use a CC/CV algorithm.

The difference is the final voltage and that answer is because 58v is too high for a LiFePO4 pack.

Since there is not an external knob to adjust the voltage, the only reasonable answer from a Seller is "they are not adjustable" since they don't want people opening the box and screwing things up.

There are other answers on that same question from folks that changed the voltage without issues.

The "UZ-" chargers are not adjustable since a few members here tried.

The YL-600 and the UY-600 should adjust.

Just make sure the charger is not connected to the pack when you adjust.

Post a picture of the inside of the charger so we can see the trim-pot arrangements of your charger.

Mark or take a close up picture of the existing trim-pot positions and count the turns in case You adjusted the wrong one and need to put it back.

Not sure which charger I have. Does this look familiar? Is it possible Nick had it trimmed to 50V already, according to the label?


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