Best lithium for 14.6-15.3V charging

[Water Bear]

Question as per the title. Thinking the answer is LTO, even though my charging voltage can only get them to between 40-75% SoC. Can't go 5s as that charges at 14, but 6s charges at like 16.8 which is way above where I'm at. What do you guys do?

The voltage range is what I observe under max load and warm (14.6) to cold idle (15.0 - 15.3), depending on the volt meter. I've got several hooked up and all they report differently ("a man with many clocks never knows what time it is"). Mechman says charging voltage should be 14.8 warm and that's probably the reality.

As an additional question, how do you guys figure required Ah? These claim a 10c rating, so do you guys figure "I need 1600A of fusing, so 6s4p @ 10c = 1600 A burst should work"? Plus maybe another bank for headroom?

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[winkychevelle 10+ year member]

EnedThat's a possibility. Mechman sells +0.5V plugs. Then the concern would be that 15.8 might burn up the electronics. But if it worked, that would be an easy way to access LTO.

Edit: That's a nice truck in your sig. You still driving it?

The single cab? No it ended up taking out 3 cows in the middle of the night on a local hwy.

My 3500hd I still have.

 

[Popwarhomie 5,000+ posts]

That's a possibility. Mechman sells +0.5V plugs. Then the concern would be that 15.8 might burn up the electronics. But if it worked, that would be an easy way to access LTO.

I have been at 15.8 for over a year now with no issues. *Knock on wood* You can get the adjustable knob to control voltage.

 

[Boominburban 10+ year member]

Most all LTO will run great at 15.3v. I run mine at 15.4 daily, and turn it up to 15.8 for comps. As someone already mentioned, and I know to be fact from running them for 7+ yrs now, most LTO does not really benefit from charging past 15.8v anyways, in a 6S config. I have experimented all the way up to MAX voltage(16.8v) and back down to 15.2, and 15.6 to 15.8 is the sweet spot. BTW, I run a combination of 10ah Scib and 3.5ah pouch cells ...

 

[Water Bear]

Most all LTO will run great at 15.3v. I run mine at 15.4 daily, and turn it up to 15.8 for comps. As someone already mentioned, and I know to be fact from running them for 7+ yrs now, most LTO does not really benefit from charging past 15.8v anyways, in a 6S config. I have experimented all the way up to MAX voltage(16.8v) and back down to 15.2, and 15.6 to 15.8 is the sweet spot. BTW, I run a combination of 10ah Scib and 3.5ah pouch cells ...

People have talked about mixing cells to balance C ratings and AH ratings. So it's working for you, then?

 

[Water Bear]

The single cab? No it ended up taking out 3 cows in the middle of the night on a local hwy.

My 3500hd I still have.

Damn, dude. Glad you made it.

 

[Boominburban 10+ year member]

People have talked about mixing cells to balance C ratings and AH ratings. So it's working for you, then?

The cells I am using have the same C ratings. And are all LTO based. So, yes, they work great together ...

 

[Thor230]

Hands down hinda insight 5.5ah NMC cells they are crazy strong a 45ah battery can handle 10 to 15k depending on alt size

 

[winkychevelle 10+ year member]

Hands down hinda insight 5.5ah NMC cells they are crazy strong a 45ah battery can handle 10 to 15k depending on alt size

Stupid volitility too.

 

[Thor230]

Stupid volitility too.

With great power comes great responsibility

 

[winkychevelle 10+ year member]

With great power comes great responsibility

Not good for introducing new guys to lithium

Lots of burned down cars from user error because the tech is new and people are ignorant.