LTO bank vs LiFeP04 for daily system

[Bobbytwonames]

 

[winkychevelle]

View attachment 40831

I just love how nearly every single picture you post is a 6s setup.

 

[winkychevelle]

I'm intending on converting it to 12v by cutting the one bar on the pack. No real reason to re-arrange the cells if it fits how it is.

I believe you are correct. It's been a while since I've had a beast module in hand.

It's not an uncommon thing to repurpose the 24v setups bars. Just something I haven't seen in a little while personally.

 

[Bobbytwonames]

I just love how nearly every single picture you post is a 6s setup.

Some of those guys were running 6 - Fi 18's on 36k or 54k. Three or four alternators and running 15.5v +. Those require a 6s bank. I posted some 5s banks. Two 5s banks.

 

[mat3833]

I believe you are correct. It's been a while since I've had a beast module in hand.

It's not an uncommon thing to repurpose the 24v setups bars. Just something I haven't seen in a little while personally.

You just have to cut one bar and you get 2 seperate banks. From there you just add 2 jumpers and bam, a 96ah 12v pack with balance leads.

 

[winkychevelle]

You just have to cut one bar and you get 2 seperate banks. From there you just add 2 jumpers and bam, a 96ah 12v pack with balance leads.

Yea I've seen it done just been a while

 

[mat3833]

Yea I've seen it done just been a while

So, with this arrangement I would be running 4s12p. I'm not 100 percent sure, but I'm guessing I can use a single BMS since each batch of 12 cells will self-equalize and we just need to match the 4s.

Does anyone have any suggestions on a remote voltage/amperage display?

Matt

 

[winkychevelle]

So, with this arrangement I would be running 4s12p. I'm not 100 percent sure, but I'm guessing I can use a single BMS since each batch of 12 cells will self-equalize and we just need to match the 4s.

Does anyone have any suggestions on a remote voltage/amperage display?

Matt

Yes 1 balancer will work.

The remove voltage/amperage display is using a digital shunt.

 

[mat3833]

Yes 1 balancer will work.

The remove voltage/amperage display is using a digital shunt.

Uhhh, Yea not familiar with digital shunts. AHOY GOOGLE!

 

[winkychevelle]

Uhhh, Yea not familiar with digital shunts. AHOY GOOGLE!

Idk which one Milo uses he might tell you or sell you one

 

[hispls]

Question: if he doesn't run the lifepo4 bank under the voltage threshold, would the cycle life be a factor? Also asking for me as well lol

Obviously the published cycle life figures are under optimum lab conditions. Over voltage, or big peak current charge/discharge should further reduce expected life. Though the "life" published is generally still leaving cells at 80% of new so it's not like you throw them away after that point either.

I'm intending on converting it to 12v by cutting the one bar on the pack. No real reason to re-arrange the cells if it fits how it is.

DO consider how big the bus bars are. Is the material sufficient for the current you'll be trying to run?

 

[winkychevelle]

https://youtube.com/c/MiloJohnTOROTECH

He has a video displaying his shunt though it doesn't explain much

 

[mat3833]

Obviously the published cycle life figures are under optimum lab conditions. Over voltage, or big peak current charge/discharge should further reduce expected life. Though the "life" published is generally still leaving cells at 80% of new so it's not like you throw them away after that point either.


DO consider how big the bus bars are. Is the material sufficient for the current you'll be trying to run?

It's tinned copper, about 1/8 thick from what I can tell, should be plenty. I do intend to re-build the packs and put them in HDPE ammo boxes down the line, when I do that I'll end up using some different bars.

Matt

 

[hispls]

It's tinned copper, about 1/8 thick from what I can tell, should be plenty. I do intend to re-build the packs and put them in HDPE ammo boxes down the line, when I do that I'll end up using some different bars.

Matt

The key is cross sectional area.

Electrical: Busbar - DC Copper Busbar Ampacities

The following tables have been provided by the Alliance for Telecommunications Industry Solutions (ATIS), T1 Committee, and represent ampacities for busbar sizes and arrangements typically found in the telecommunications industry.

www.copper.org

 

[mat3833]

The key is cross sectional area.

Electrical: Busbar - DC Copper Busbar Ampacities

The following tables have been provided by the Alliance for Telecommunications Industry Solutions (ATIS), T1 Committee, and represent ampacities for busbar sizes and arrangements typically found in the telecommunications industry.

www.copper.org

Yea, the link says "300a" buss bars. Can't really do the math with them in hand, but it looks like they are at least that 300a rating if they are 1/8.

Matt