Search found 347 matches

by thunderstorm80
Aug 13 2016 9:18am
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 6922

Re: A123 prismatic cells - THE solution?

Methinks where ur going wrong is u r fixated on the brand A123, and hard cased prismatic as a format.. My understanding is that making pouch cells using the same lifepo4 chemical brew is easy, and even no-name mainstream chinese paks are fine. Thats where u should be looking. i recently ordered a 5...
by thunderstorm80
Aug 13 2016 4:49am
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 6922

Re: A123 prismatic cells - THE solution?

Yes that is a great idea-- no current limiter needed and is pretty straightforward. Many 48V packs (14S li-ion or 16S LiFe) work nearly perfectly together. More info: https://endless-sphere.com/forums/viewtopic.php?f=14&t=78434&p=1157862 I know I can put them in parallel with the correct ratio of s...
by thunderstorm80
Aug 13 2016 4:46am
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 6922

Re: A123 prismatic cells - THE solution?

And still - I am not convinced who will buy a regular Li-Ion chemistry for a powerful EV unless you don't mind buying your whole pack again after 2-3years. (Assuming a daily heavy use with powerful regen) First off, your A123 cells are Li-Ion, they just use a LiFePO4 cathode material. Modern NMC/NC...
by thunderstorm80
Aug 11 2016 4:36am
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 6922

Re: A123 prismatic cells - THE solution?

Exactly! Imagine how much money you would have spent on Li-Ion chemistry over 9 years. If weight is a problem, I can just take 2 of my A123 packs (instead of 4), and let them run all the power: 39.6V 2.3Ah*2 => 4.6Ah. That's "just" 9C for a 40A controller, which is nothing for a cell which is rated...
by thunderstorm80
Aug 10 2016 6:28am
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 6922

Re: A123 prismatic cells - THE solution?

A123s are great for power and longevity, and in some situations are still highly desireable. Not as great for volume and weight but you can't win them all. I've got some nearing 9 years old with lots of abuse... recently tested over 95% of original capacity. A ~5kWh prismatic pack I've got weighs 1...
by thunderstorm80
Aug 10 2016 6:24am
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 6922

Re: A123 prismatic cells - THE solution?

Try a forum search on "A123 xxx".. There is a LOT of info on both pouch pack builds, suppliers (be very careful) , and issues that some have had in use. A123 can cells , such as yours, are highly regarded for many power applications, where quality, reliability and safetty are primary requirements, ...
by thunderstorm80
Aug 09 2016 4:02pm
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 6922

Re: A123 prismatic cells - THE solution?

li-ion have gotten very cheap compared to lifepo4, and when taking in the consideration that if you pull the same out of both packs the depth of discharge is much lower on li-ion due to the higher capacity, therefor the "500" cycle rating isn't such a big deal. Since said cycle rating goes up to 10...
by thunderstorm80
Aug 09 2016 3:05pm
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 6922

A123 prismatic cells - THE solution?

Hi, 5.5 years ago I bought four A123 packs of 39.6V 2.3Ah each. I thought they were pricey then, but now after 5.5 years of abuse with motor that draws 2800W and regens 1200W, I feel stupid for not buying more. They are still perfect! Even they don't have BMS - individual checking shows that all cel...
by thunderstorm80
Jun 14 2016 4:23am
Forum: E-Bike Technical
Topic: Converting Bafang 9 pin connector to Grin-controllers
Replies: 3
Views: 837

Converting Bafang 9 pin connector to Grin-controllers

Hello, I bought a 72V 40A Grinfineon Controller that comes with Anderson connectors for the phase wires, and JST-SM connectors for the hall sensors. I want it to power my rear Bafang SWHX, and since that motor has the 9 pin (dean?) connector I have to make a conversion. I couldn't find any shelf pro...
by thunderstorm80
Apr 14 2016 4:50am
Forum: Motor Technology
Topic: Hotrodding possible for Bafang SW01 ?
Replies: 5
Views: 659

Re: Hotrodding possible for Bafang SW01 ?

It's amazing the amount of mental gymnastics some folks will go thru to justify system abuse. You can run 2K Watts thru a mini-motor on the Ebike CA and get other-Worldly performance results since the Sim is not acurately portraying phase saturation. Not to mention how the nylon gears will turn to ...
by thunderstorm80
Apr 13 2016 2:40am
Forum: Motor Technology
Topic: Hotrodding possible for Bafang SW01 ?
Replies: 5
Views: 659

Hotrodding possible for Bafang SW01 ?

Hi, I live in a 250W-limit regulation country, and I have a folding 20inch bike with a rear Bafang SW01 geared motor. I discovered via CA that the actual current provided by the stock controller is 15A (for a max power of 540W), just as I thought... (and unlike the "250W" sticker which is on the mot...
by thunderstorm80
Apr 02 2016 1:20am
Forum: E-Bike General Discussion
Topic: E-Bike for touring the world and regen discussion
Replies: 34
Views: 2917

Re: E-Bike for touring the world and regen discussion

I have not found , yet , a small/light weight / cost effective / quality generator, the Honda/Yamaha ones are small , only if you have a camper van or RV, and too heavy to carry around on a bike/trailer. Perhaps someone here knows of any ? Regen and the Mac 6T , I do not know why I am consistently ...
by thunderstorm80
Apr 02 2016 1:12am
Forum: E-Bike General Discussion
Topic: The most battery capacity ebike you know of?
Replies: 55
Views: 3508

Re: The most battery capacity ebike you know of?

Hey, As far as I know, the most affordable&stable&economical cells (that have a good cycle life as well), are currently with a gravimetric density in the order of 170Wh/Kg. Beyeond that it's still "bleeding edge". All lithium batteries (with the exception of LiFePo4) give out the best when you don't...
by thunderstorm80
Apr 01 2016 1:28pm
Forum: E-Bike General Discussion
Topic: E-Bike for touring the world and regen discussion
Replies: 34
Views: 2917

Re: E-Bike for touring the world and regen discussion

Whew , many things to address here. First, Generator is too heavy, When I speak of flexable solar panel, I am talking about a different panel from what you would put on your house. the panel is only 3 kg. here is a link : http://www.bimblesolar.com/140w-semi-flexible and you can take a kids trailer...
by thunderstorm80
Apr 01 2016 1:09pm
Forum: E-Bike General Discussion
Topic: E-Bike for touring the world and regen discussion
Replies: 34
Views: 2917

Re: E-Bike for touring the world and regen discussion

Look at the Xootr Swift if you want a seriously rideable folding bike. I looked at the Xootr website. Their bikes feel rather cheap and their spec is not fully listed. That feeling was more pronounced when I red about their electric bike version, where all they can say in the spec about the motor i...
by thunderstorm80
Apr 01 2016 12:37pm
Forum: E-Bike General Discussion
Topic: The most battery capacity ebike you know of?
Replies: 55
Views: 3508

Re: The most battery capacity ebike you know of?

I am building a electric mid drive yuba bike and plan to have over 7kw of battery to make the longest range ebike possible. I have purchased a 103.6v 68ah nominal Panasonic cells battery specificly made for yuba bike in mind, which is lightweight at 56 pounds. Am I the only one who note that this p...
by thunderstorm80
Mar 31 2016 10:51am
Forum: E-Bike General Discussion
Topic: The most battery capacity ebike you know of?
Replies: 55
Views: 3508

Re: The most battery capacity ebike you know of?

I am building a electric mid drive yuba bike and plan to have over 7kw of battery to make the longest range ebike possible. I have purchased a 103.6v 68ah nominal Panasonic cells battery specificly made for yuba bike in mind, which is lightweight at 56 pounds. Am I the only one who note that this p...
by thunderstorm80
Mar 30 2016 5:01am
Forum: E-Bike General Discussion
Topic: E-Bike for touring the world and regen discussion
Replies: 34
Views: 2917

Re: E-Bike for touring the world and regen discussion

Thunderstorm80, You want to go up mountains , like the Alps ? Unless you stay in Hotels/Hostels/Guesthouses the whole way, but even then you will be loaded down with clothing/shaver/computer , etc. Are there going to be electrical outlets everywhere you go ? Yes, and I will be carrying a tent and c...
by thunderstorm80
Mar 30 2016 4:19am
Forum: E-Bike General Discussion
Topic: E-Bike for touring the world and regen discussion
Replies: 34
Views: 2917

Re: E-Bike for touring the world and regen discussion

That 3525 has wires coming out the end of the axle. Very bad and they use to have shitty axle. The leaf 1,500 has a better wire exit. Regen maybe 8% maybe. Ain't all the hub motor have wires coming from their axles? Where else? I will be happy see a picture, to demonstrate what you mean :) The leaf...
by thunderstorm80
Mar 30 2016 12:46am
Forum: E-Bike General Discussion
Topic: E-Bike for touring the world and regen discussion
Replies: 34
Views: 2917

Re: E-Bike for touring the world and regen discussion

Look at the Xootr Swift if you want a seriously rideable folding bike. I looked at the Xootr website. Their bikes feel rather cheap and their spec is not fully listed. That feeling was more pronounced when I red about their electric bike version, where all they can say in the spec about the motor i...
by thunderstorm80
Mar 29 2016 8:07am
Forum: E-Bike General Discussion
Topic: E-Bike for touring the world and regen discussion
Replies: 34
Views: 2917

Re: E-Bike for touring the world and regen discussion

Hey Dogman! First of all, thanks for replying. Of course getting a 2000W motor or even beyond is very tempting... but I want this vehicle to be just as adequately powered for the mission, but still light enough to be carried on stairs, buses, etc... a H3525 motor is rated for 600W-1200W which is mor...
by thunderstorm80
Mar 29 2016 6:25am
Forum: E-Bike General Discussion
Topic: E-Bike for touring the world and regen discussion
Replies: 34
Views: 2917

E-Bike for touring the world and regen discussion

Hello, I was a passive observer here on ES for long time, but have decided now to register and be part of the community! And here is my first question: I do once in a while a touring trip across a country with my bicycle (unpowered). I thought why not do it with an E-Bike. Not only to help cover lar...