Search found 347 matches

by thunderstorm80
Jan 02 2018 9:28pm
Forum: Battery Technology
Topic: A123 20Ah prismatic cells got expanded - What can be done?
Replies: 26
Views: 1619

A123 20Ah prismatic cells got expanded - What can be done?

Hi, I use those cells on all my E-bikes. I wrap all of them into a battery pack using several layers of gopher tape, which proved very well for applying the required pressure upon the cells. (I apply pressure by hand when I wrap them, as they require to be pressurized a bit) Yesterday, I discovered ...
by thunderstorm80
Nov 04 2017 5:30am
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 6893

Re: A123 prismatic cells - THE solution?

To my knowledge, not a single vehicle OEM in the world is using A123 products today for an EV traction battery (I think a couple Chinese cars use them for start-stop ICE batteries today). A123 was unquestionably an industry leader when the M1 cell first emerged 11-12 years ago. While holding that t...
by thunderstorm80
Nov 03 2017 4:53pm
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 6893

Re: A123 prismatic cells - THE solution?

Some years ago the A123 M1A/M1B cells had been hyped for RC model usage because of theire robustness and the possibility for charging / discharging them at extreme high levels. I personally have used them too, but replaced them later by LiPos because of the much higher energy and power density. If ...
by thunderstorm80
Oct 25 2017 9:40am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1212
Views: 208086

Re: Compact Field Oriented Controller, ASI + Grin, limited r

My motor seems to keep going at low amp after applying the throttle. Once it spins up and i release the throttle i still see around 60W going in. I am controlling it with a CA and it shows throttle out voltage as 1.0. The minimum throttle i have on the controller is 1.10. I dont understand why my m...
by thunderstorm80
Oct 20 2017 1:11pm
Forum: E-Bike Technical
Topic: Using bicycle's frame as heatsink for the Phaserunner
Replies: 45
Views: 4619

Re: Using bicycle's frame as heatsink for the Phaserunner

Funny 21st century problem you got there. Straight round tubes made the best bicycle frames 100 years ago, and it's still true today. It's not very hard to thermally interface with one of those. Not when you have hydroforming geometry: The cross-section at any part of the frame along it's length is...
by thunderstorm80
Oct 20 2017 1:09pm
Forum: E-Bike Technical
Topic: Using bicycle's frame as heatsink for the Phaserunner
Replies: 45
Views: 4619

Re: Using bicycle's frame as heatsink for the Phaserunner

I'm not sure how much effort you want to put into this, but you can cast a formed heat sink in aluminum with not much more than some wax, a BBQ grill, some old beer cans. Simplified, the process would be something like: -cover the Phaserunner and frame with masking tape. Then tape the Phaserunner t...
by thunderstorm80
Oct 20 2017 1:07pm
Forum: E-Bike Technical
Topic: Using bicycle's frame as heatsink for the Phaserunner
Replies: 45
Views: 4619

Re: Using bicycle's frame as heatsink for the Phaserunner

"DIY phaserunner heat sink" (several examples shown) https://endless-sphere.com/forums/viewtopic.php?f=3&t=82196 For this one, I clamped two thick square-bars together and drilled-out the center with a hole-saw. I drilled from both ends towards the center, then separated them and halfmoon-filed the...
by thunderstorm80
Oct 20 2017 1:02pm
Forum: E-Bike Technical
Topic: Using bicycle's frame as heatsink for the Phaserunner
Replies: 45
Views: 4619

Re: Using bicycle's frame as heatsink for the Phaserunner

Drunkskunk's proposed solution of molding your own aluminum heatsink with a BBQ sounds so awesome!! Someday I will have to try that! But in general, How much of a win is it to add a heatsink to the Phaserunner? How much current draw from the battery do you need to make it worthwhile? For instance m...
by thunderstorm80
Oct 17 2017 1:53am
Forum: E-Bike Technical
Topic: Using bicycle's frame as heatsink for the Phaserunner
Replies: 45
Views: 4619

Using bicycle's frame as heatsink for the Phaserunner

Hi, One of the great advantages of the Phaserunner is it's low weight, but when you add a big heat sink you kind of negate that. Especially when you have such a huge heat sink beneath your legs. (the bike frame) I would have liked to use the frame as a heatsink, but the frame is hydroformed - so it ...
by thunderstorm80
Oct 10 2017 3:34am
Forum: E-Bike Technical
Topic: Chain-ring PAS gets loose due to aluminium chainring. Help..
Replies: 0
Views: 224

Chain-ring PAS gets loose due to aluminium chainring. Help..

Hi, I use this chain-ring PAS, sold at Grin: http://www.ebikes.ca/shop/electric-bicycle-parts/torque-sensors/pas-12p-chr.html I have several E-bikes, and on those with steel bolts and steel chainrings it work fine, but on the third bike - the bolts are steel but the chainring is from aluminium. This...
by thunderstorm80
Oct 06 2017 12:02pm
Forum: E-Bike Technical
Topic: New 2017 updates to ebikes.ca motor simulator to try out
Replies: 69
Views: 22729

Re: New 2017 updates to ebikes.ca motor simulator to try out

FINALLY !!!!!! :D :D :D :D Thank you so much Justin! With the addition of torque-throttle and fully detailed custom-motor option, your Motor-Simulator is truly up to date! It seems you are eventually following (almost) all our suggestions. :P I know I sound "greedy" when saying this at this moment o...
by thunderstorm80
Oct 06 2017 7:34am
Forum: E-Bike Technical
Topic: Field-weakening on Phaserunner (Advanced question)
Replies: 0
Views: 341

Field-weakening on Phaserunner (Advanced question)

Hi, I use the Phaserunner's field weakening ability sometimes, and came into these two problems when planning my system's performance: 1. How can I calculate the expected delta-kV value vs increasing weakening current? (so I know how much my max torque potential on the given motor has declined while...
by thunderstorm80
Sep 24 2017 3:39am
Forum: E-Bike Technical
Topic: How to prevent punctures once and for all!
Replies: 35
Views: 3134

Re: How to prevent punctures once and for all!

Wait... So according to the stick-to-the-max-pressure approach, I understand that having a fat-Ebike with Surly blackfloyd's (2 6 x 3 . 8 ) so I can run them at 15PSI or lower is a very, very bad idea on roads? I have built that E-bike so I can carry luggage around town and when going long distance...
by thunderstorm80
Sep 23 2017 4:44pm
Forum: E-Bike Technical
Topic: How to prevent punctures once and for all!
Replies: 35
Views: 3134

Re: How to prevent punctures once and for all!

So you say - stick to the maximum pressure? On my E-bikes I use the minimum allowed pressure because it provides cushion and best-protects against vibrations which eventually loosen screws/nuts/or worse... After all, rolling resistance is less of an issue compared with pedal powered only bikes. (I ...
by thunderstorm80
Sep 23 2017 4:36pm
Forum: E-Bike Technical
Topic: How to prevent punctures once and for all!
Replies: 35
Views: 3134

Re: How to prevent punctures once and for all!

That's why one uses a plug kit designed for bicycle tires like the one I linked above. "Fix-A-Flat in cans does not work. But since the tubeless tire will already have sealant in it, after the hole is plugged, all that is needed is to air it up. From my experience, no sealant can plug damage from g...
by thunderstorm80
Sep 21 2017 9:02am
Forum: E-Bike Technical
Topic: How to prevent punctures once and for all!
Replies: 35
Views: 3134

Re: How to prevent punctures once and for all!

27.5 is the "new hotness", recreational/fad tire size. You won't find many utility tires in that size. But it's the same rim diameter as 650B or ISO 584 (another novelty wheel size), and you probably will be able to get a narrower tire with good puncture protection if your rims are less than 40mm w...
by thunderstorm80
Sep 20 2017 2:21pm
Forum: E-Bike Technical
Topic: How to prevent punctures once and for all!
Replies: 35
Views: 3134

Re: How to prevent punctures once and for all!

There are bicycle tire manufacturers that make tubeless ready rims. I think Dt Swiss has some. It won't prevent flats, but it's easier to patch a tubeless. Sent from my SM-G930F using Tapatalk Is it possible to use a "worm" patch for autos, to seal in realtime a leaking or completely deflated tube-...
by thunderstorm80
Sep 20 2017 2:17pm
Forum: E-Bike Technical
Topic: How to prevent punctures once and for all!
Replies: 35
Views: 3134

Re: How to prevent punctures once and for all!

As a kid in the early 60's, I would get so jealous of those guy's on skinny high-pressured tires,.... not only did they go faster, but they had far fewer flats than my 24" balloon-tired "tank"! And they were jus thin-skinned, barely there tires with like 90psi in 'em!!!! Of course they were ALWAYS ...
by thunderstorm80
Sep 18 2017 8:54am
Forum: E-Bike Technical
Topic: How to prevent punctures once and for all!
Replies: 35
Views: 3134

How to prevent punctures once and for all!

Today I had (again) a flat-tire after (probably) riding on broken glass which was probably a bottle-beer that has been "placed" there "carefully" by some low-life form. I use Schwalbe super-moto X tire (27.5inch x 2.8inch) which is supposed to have a good armor. Apparently not. I am not asking this ...
by thunderstorm80
Sep 17 2017 4:09am
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 6893

Re: A123 prismatic cells - THE solution?

LiIon has about two times or more watt hours per weight and volume. this means if you have 1000 charge cycles on a LiFe battery, you would have only 500 on a LiIon battery. I once thought about using A123 M1B for one high power bike because they can be charged extremely quick and are ery safe, but ...
by thunderstorm80
Sep 15 2017 3:36am
Forum: E-Vehicles General Discussion
Topic: How to control 2 DD motors independently on a 2AWD bike?
Replies: 13
Views: 1581

Re: How to control 2 DD motors independently on a 2AWD bike?

In that case I would set up a secondary lever on each mechanical brake lever for the ebraking, and circuits to override the throttle voltage when the braking levers were used. In e vehicles they often use paddles on the steering wheel for e braking. Can you show a diagram/picture of what you mean? ...
by thunderstorm80
Sep 15 2017 3:31am
Forum: Battery Technology
Topic: A123 prismatic cells - THE solution?
Replies: 65
Views: 6893

Re: A123 prismatic cells - THE solution?

My A123 20ah cells can only deliver 18ah. But for 840 cycles. Oh so far. And still 18ah. No bms very hard regen. May be that the regen is awaking them up. With a charge pulse. Just a guess. Regen pulses have nothing to do with awakening a cell. It's just that those cells are the only commercial Li-...
by thunderstorm80
Sep 14 2017 1:33pm
Forum: Battery Technology
Topic: Looking for a battery charger (with balance)
Replies: 14
Views: 1064

Re: Looking for a battery charger (with balance)

639EUR???? I only need an RC charger to balance the cells once in a while... For everyday charging I use Grin's Satiator which costs less than half of that (300$) and it's the most reliable charger I have ever seen. It's true that you get what you pay for, but with that amount I can burn 20+ of tho...
by thunderstorm80
Sep 14 2017 8:47am
Forum: Battery Technology
Topic: Looking for a battery charger (with balance)
Replies: 14
Views: 1064

Re: Looking for a battery charger (with balance)

Remember to always power up the charger before you connect the battery to prevent the inrush spark. I do it, and still - when I connect the battery it sparks big time, including even through the delicate JST balance leads. It's amazing how those devices are so poorly engineered (even the ones that ...
by thunderstorm80
Sep 13 2017 8:32am
Forum: Battery Technology
Topic: Looking for a battery charger (with balance)
Replies: 14
Views: 1064

Re: Looking for a battery charger (with balance)

Remember to always power up the charger before you connect the battery to prevent the inrush spark. I do it, and still - when I connect the battery it sparks big time, including even through the delicate JST balance leads. It's amazing how those devices are so poorly engineered (even the ones that ...