Search found 112 matches

by Username1
Jun 11 2021 5:50pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

That makes sense, those reasons all crossed my mind as well. So I guess you could just switch out a de-rated breaker like this to match the receptacle and all would be fine.
by Username1
Jun 11 2021 4:40pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

First, stackexchange is not code. Second, it should be obvious why you should not trust the answer that includes "I am not sure whether it is legal to plug a 40A rated appliance into a circuit breakered for 50A". The exception cited is actually de-rating the circuit breaker for the intend...
by Username1
Jun 11 2021 9:31am
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

Fair enough, it may not ultimately be a good idea. I am talking specifically about using a kitchen outlet (not bathroom) but I get your point. It wasn't about saving money, but rather the convince idea of being able to charge in any home. Like I said, I can have my own wiring done for free. In terms...
by Username1
Jun 11 2021 12:14am
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

When citing a datasheet, it would be helpful to attach it to your post so we can see the conditions specified. I'm certainly interested in learning. Sure, I just figured out how to attach it. This was sent to me from Yinlong. This is for their 30ah prismatic cell. No, this would break code and is u...
by Username1
Jun 10 2021 7:42pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

I just read that the 80% rule only applies to continuous loads, which are considered 3+ hours. If I'm not mistaken, then you should be able to use the full 50a on 14-50. That would allow 10kw charging, making 6c possible for LTO batteries up to 1.3kwh. The other thing I realized is that some 14-50 r...
by Username1
Jun 10 2021 1:06pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

its abosutely no problem to make a battery last 10+ years. i do so in a daily basis, its litteraly the core of my business. hell even the scooter my wife uses every day to drive 50 miles has done so for 7 years now and it still has 87% of its orignal capacity. From what I've seen most lithium used ...
by Username1
Jun 09 2021 7:21pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

You misunderstood. I was referring to "normal lithium" (not LTO) being only 3-4x. That was a direct reply to the statement that "normal lithium" fits 6x in the same volume. I edited that post to make it clearer.
by Username1
Jun 09 2021 6:48pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

i am still missing WHY you need to recharge in less then 15 minutes after consuming ~1kWh of energy. it would seem that increasing the battery size would decrease the need for such a charging need. Because it's awesome to recharge that fast, and I don't want a shit battery that wears out in 3 years...
by Username1
Jun 09 2021 12:34am
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

Back to chargers... Can someone explain why something like this would be a bad idea, other than just "it's chinese". Serious question i want input on this. https://wemaxpower.en.alibaba.com/product/1600158425594-819922260/Laboratory_research_8000W_50V_160A_64V_125A_80V_100A_100V_80A_125V_6...
by Username1
Jun 08 2021 3:34pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

i seriously doubt you understand how big the "250A issue" really is. At the absolute maximum we're talking about 160a, not 250. you need to select the right battery for the application, not the other way around. that is like buying a semi+trailer for driving down the street. if you actual...
by Username1
Jun 08 2021 1:36pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

Thanks, I'd seen some brands I'd never heard of claiming 60C and was taking it with a pinch of salt but if Toshiba has those kind of figures in their own documentation then LTO is definitely capable of reducing overall pack size in motorsports (regen). I can see why some busses are charging at stop...
by Username1
Jun 08 2021 1:03pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

Am I reading this right, Toshibas 10Ah high power density LTOs can take over 600 amps charge for 10 seconds (when at 50% capacity)? https://www.global.toshiba/ww/products-solutions/battery/scib/product/cell.html Yes Toshiba has a range of high power LTO cells which can take ultra extreme charging/d...
by Username1
Jun 08 2021 12:54pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

As I said, there is no specific usage in mind. Broadly speaking it will be used like any other ebike/escooter, to get around. So yes it's a fun project meant to see what could be made to take advantage of the properties of LTO, but the goal is to have something useable. 1: what would your vechicle c...
by Username1
Jun 08 2021 12:18pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

please ignore john fatty and chalo, they dont have a clear understanding of the basics and you end up in the woods like that. That could be so but I have a lot to learn as well, and john and others have helped me understand a lot. Now about the details of the project itself... Firstly you can ignor...
by Username1
Jun 07 2021 9:17pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

You guys are making a lot of assumptions... 1. Who said there won't be a bms, or protections for the power supply? 2. What is so inherently dangerous about charging inside? This chemistry basically can't catch on fire from my understanding, whether from overcharging, heat, puncture etc. It's not lik...
by Username1
Jun 07 2021 1:47pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

If any "electrical [you] can have done for free", why does using a common residential plug matter? For anybody naked charging at 10kW, the plug style is the very least of your concerns and last of your design criteria. Sure I could wire a 60a receptacle or whatever but I like the idea of ...
by Username1
Jun 06 2021 9:53pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

Could be worth looking at welding transformers for big amps at low cost, stick and TIG welders are almost always current regulated and MIGs voltage regulated, voltage ranges around 24v to 60v. Nice idea, I'll look into it. Have you considered charging at DC fast charging stations instead? Yes but a...
by Username1
Jun 06 2021 3:17am
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

True you can use multiple circuits. I was thinking in terms of a single charger, common receptacles, and including homes which only have 60a service. That's what I meant by "practical limit". Yinlong links directly to the Alibaba store from their main website. Those banners in my last post...
by Username1
Jun 05 2021 10:31pm
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

Some updates. First the power supply. I did some research on receptacles. Nema 14-60 (240v 60a) is the highest power for home use, but it's basically never used. The 14-50 seems to be the highest found in homes, used commonly for stoves. They're also used for welding and found in campgrounds I've r...
by Username1
Mar 16 2021 3:49pm
Forum: Battery Technology
Topic: Single Cell Battery
Replies: 6
Views: 366

Re: Single Cell Battery

What got me thinking about this was reading Elon Musk's tweet below, responding to a rumored "monocell" for a rumored Apple car. Elon stated the voltage would be 100x too low if using a single cell. Tesla cars are around 100kwh, so in theory a 1kwh ebike with just 1 cell would be in the re...
by Username1
Mar 09 2021 12:53pm
Forum: Battery Technology
Topic: Single Cell Battery
Replies: 6
Views: 366

Re: Single Cell Battery

Yeah that would do it! I was thinking about normal l-ions when i said there's none that size, but i actually have seen those type of big lifepo4 before.
by Username1
Mar 09 2021 12:32pm
Forum: Battery Technology
Topic: Single Cell Battery
Replies: 6
Views: 366

Single Cell Battery

A battery made of a single cell. For something like a car it would be physically impossible, but for a moderately powered ebike or escooter it actually does seem possible according to physics. No doubt it's not the most practical, and the cells/motors/controllers/chargers aren't currently being prod...
by Username1
Mar 09 2021 11:45am
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

For my desired top speed, and to charge these cells at 6c while under 10kw, the ideal voltage would be around 36v nominal. That's why I was looking at the Mean Well RST-10000-36 which seemed perfect except that i didn't realize it's a 3 phase ac input. The highest power single phase unit from Mean W...
by Username1
Mar 09 2021 9:51am
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

I don't think the power supply is the last thing I need to worry about, it really all hinges on that. The main goal of this project is the 10 minute charge, so I'm trying to find a power supply capable of that. I don't feel comfortable buying some high powered switching power supply from China, in t...
by Username1
Mar 09 2021 5:28am
Forum: Battery Technology
Topic: Charging LTO at Max Speed?
Replies: 118
Views: 8314

Re: Charging LTO at Max Speed?

I'm well aware of the differences between LTO and other chemistries, and have run all the numbers already. The only downsides are energy density and cost, neither of which are an issue in my case. In exchange I get a battery with 10 minute charging, 10,000+ cycles, extreme temperature tolerance, hig...