Search found 1395 matches

by SlowCo
Feb 06 2020 3:44am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Observed trials bike designing
Replies: 67
Views: 4017

Re: Observed trials bike designing

Why not get or build a 72V battry pack and use a lower gearing (mid drive QS motor, not hub?) to be able to use all the power the motor has to offer?
by SlowCo
Feb 05 2020 8:27am
Forum: Battery Technology
Topic: EASY/FAST/INEXPENSIVE way to connect pouch-cells together
Replies: 24
Views: 1188

Re: EASY/FAST/INEXPENSIVE way to connect pouch-cells together

For pouches with thin metal tabs that are long enough and not too wide maybe a tube squeezer key made of bare copper wire could be used to roll them up together. Then put small metal paper clamps over the rolled up tabs and remove the hinged wire "handles".
tube squeezer key.jpg
tube squeezer key.jpg (25.28 KiB) Viewed 611 times
paper clamp.jpg
paper clamp.jpg (14.63 KiB) Viewed 611 times
by SlowCo
Feb 04 2020 12:19pm
Forum: E-Bike Non-hub Motor Drives
Topic: New "Lingbei MM28.250 torque sensor mid drive"
Replies: 384
Views: 67367

Re: New "Lingbei MM28.250 torque sensor mid drive"

@slowco that's an excellent proposition. The tdsz2 is very nice for range. It's pretty noisy and lack torque but it does make wonders for battery consumption :) The TSDZ2 probably only lacks torque at the legal 250W limit on standard firmware :wink: Although I have no experience with that mid drive...
by SlowCo
Feb 04 2020 12:12pm
Forum: Battery Technology
Topic: Lifepo4 prismatic cut off voltage question
Replies: 13
Views: 433

Re: Lifepo4 prismatic cut off voltage question

What you do need to do is leave it on the charger for many many hours after the light is turning green because bms down the high cell which will return on your charger to fill up the rest of the path but it takes a long time over and over again. But that won't work if he really has a 55V charger (i...
by SlowCo
Feb 04 2020 10:07am
Forum: Battery Technology
Topic: Lifepo4 prismatic cut off voltage question
Replies: 13
Views: 433

Re: Lifepo4 prismatic cut off voltage question

It maxes out the charging voltage to 55+V.... so I think I am now good there. Much better, perfect in fact. ??? At 55V max. charging voltage it is possible that the BMS is not balancing yet as that is under 3.45V per cell. That might explain the widely varying range. My LiFePo4 16S BMS starts balan...
by SlowCo
Feb 04 2020 7:30am
Forum: E-Bike Non-hub Motor Drives
Topic: New "Lingbei MM28.250 torque sensor mid drive"
Replies: 384
Views: 67367

Re: New "Lingbei MM28.250 torque sensor mid drive"

I’m thinking of buying a lingbei too, what is your range on low assist? What battery capacity should i need for a 100 mile range? That depends if you live in Limburg or the flatter parts of the Netherlands. :wink: If you're looking for a mid drive with torque sensor you should also look at the TSDZ...
by SlowCo
Feb 03 2020 9:25am
Forum: E-Vehicles General Discussion
Topic: C Cab Hot Rod Power Advice
Replies: 347
Views: 16480

Re: C Cab Hot Rod Power Advice

Bench higher, batteries underneath.jpg
Bench higher, batteries underneath.jpg (33.52 KiB) Viewed 1053 times

As there seems head room enough why not place your seat/bench higher so you can put the batteries underneath?
Especially with Nissan Leaf modules laid flat you can put way more Ah/Wh of capacity under the seat and have long trips together :wink:
by SlowCo
Feb 02 2020 3:35pm
Forum: General Discussion
Topic: Eternal outskirts of Moscow and beyond (LOTS of pics!)
Replies: 228
Views: 10148

Re: Eternal outskirts of Moscow and beyond (LOTS of pics!)

That is a nice hybrid type solution. Just like an Opel Ampéra. The gasoline engine only provides electricity and no direct propulsion. Beautiful trip. Wish I could still sit on a bike that long.
by SlowCo
Feb 02 2020 10:20am
Forum: E-Bike General Discussion
Topic: Powerd wheelchair build
Replies: 23
Views: 1087

Re: Powerd wheelchair build

A bit expensive but electric assist wheelchair wheels do exist. You could lace them in 20" fatbike rims with fatbike tires and use a beach front wheel attachment to go over rough terrain. https://www.sunrisemedical.com/manual-wheelchairs/quickie/manual-power-assist/xtender . Xtender-Beauty.jpg https...
by SlowCo
Feb 01 2020 12:36pm
Forum: E-Bike General Discussion
Topic: Powerd wheelchair build
Replies: 23
Views: 1087

Re: Powerd wheelchair build







There is a lot possible as a solution for mobility. But you need to know what will work in your situation. What terrain will you be riding how steep will you need to climb on what type of soil etc.
by SlowCo
Feb 01 2020 7:32am
Forum: E-Scooter and Motorcycle General Discussion
Topic: jonescg's NEW electric racebike BUILD thread!
Replies: 1267
Views: 210054

Re: jonescg's NEW electric racebike BUILD thread!

jonescg wrote:
Feb 01 2020 7:26am
Anyone who wants them can have them - 175 V at top of charge (42s2p, 5000 mAh cells).

Would make for a baller e-bike :)
175V would turn my e-bike into fireworks... :lol:
by SlowCo
Feb 01 2020 7:23am
Forum: E-Bike Non-hub Motor Drives
Topic: Albatros enduro bike.
Replies: 98
Views: 18949

Re: Albatros enduro bike.

:shock:
:bigthumb:
8)

Damn, that is a great build!
by SlowCo
Feb 01 2020 7:21am
Forum: E-Scooter and Motorcycle General Discussion
Topic: jonescg's NEW electric racebike BUILD thread!
Replies: 1267
Views: 210054

Re: jonescg's NEW electric racebike BUILD thread!

Thanks for posting this. Great craftsmanship!
I take it that the pouches that were still holding a charge of around 4V can be reused in a lower power application battery pack?
by SlowCo
Jan 28 2020 8:12am
Forum: E-Bike General Discussion
Topic: E-S LMX 64 Bike Owners
Replies: 478
Views: 54418

Re: E-S LMX 64 Bike Owners

And thanks for the spare belt! I think I will drop it down to 175A (from 190 currently) and see how it goes. No, no, you will have a spare belt so you need to test out where the limit of the belt is! Just increase the phase amps until the belt looses its teeth or breaks so other owners know how far...
by SlowCo
Jan 27 2020 6:18pm
Forum: E-Vehicles General Discussion
Topic: C Cab Hot Rod Power Advice
Replies: 347
Views: 16480

Re: C Cab Hot Rod Power Advice

No you can't magically connect 4 batteries series-parallel and get 4 times the voltage AND 4 times the Ah. 4 batteries in series= 4x the voltage but the Ah stays the same as a single battery 4 batteries in parallel= 4x the Ah but the voltage stays the same as a single battery 2 batteries in series c...
by SlowCo
Jan 27 2020 1:44pm
Forum: E-Vehicles General Discussion
Topic: C Cab Hot Rod Power Advice
Replies: 347
Views: 16480

Re: C Cab Hot Rod Power Advice

As I understand, what is in the video, and what I drew up, is that the series and parallel are combined , as shown in the latter part of the video. In their example they only used a 24 volt example, thus doubling from 12v to 24v AND doubling the ah from 115 to 230. At least that's how I understand ...
by SlowCo
Jan 27 2020 1:03pm
Forum: E-Vehicles General Discussion
Topic: C Cab Hot Rod Power Advice
Replies: 347
Views: 16480

Re: C Cab Hot Rod Power Advice

If you put 4 of those batteries in series then the voltage will be 4x12V=48V but the Ah will stay 20Ah (22Ah for the batteries in your link). If you use them in parallel then the voltage will stay 12V and the Ah would be 4x20Ah=80Ah. And if you put some serious load on the batteries put in series wi...
by SlowCo
Jan 27 2020 11:50am
Forum: E-Bike General Discussion
Topic: Powerd wheelchair build
Replies: 23
Views: 1087

Re: Powerd wheelchair build

If you're in a wheelchair and have trouble sitting on a mobility scooter and transferring to another (wheel)chair then maybe it would be better to get a motorized handbike that fits your own wheelchair. 116083-13115339.jpg High-torque-350w-motor-electric-wheelchair-handbike.jpg s2-1fade-2-2_copy.jpg...
by SlowCo
Jan 21 2020 1:47pm
Forum: E-Bike Build Threads / Photos & Video
Topic: Vintage GT Palomar BBS02 basic build
Replies: 5
Views: 1203

Re: Vintage GT Palomar BBS02 basic build

Yes, I have the same problem of the CoG going way up when I mount my bike :shock: I'll be building up a (low budget) full suspension mountain bike with a BBS02B soon. But first I'm trying to finish a bike build with a simple brushed 1016Z motor. As soon as I start the BBS02 build I'll start looking ...
by SlowCo
Jan 21 2020 8:06am
Forum: E-Bike Non-hub Motor Drives
Topic: Frey CC ordered!
Replies: 58
Views: 7419

Re: Frey CC ordered!

wiRider wrote:
Jan 21 2020 7:56am
First post, my quest for information on the CC led me here :)
This might be of interest to you if buying in the US: viewtopic.php?f=31&t=103540&p=1518139
by SlowCo
Jan 21 2020 8:03am
Forum: Items for Sale - New
Topic: Spanish e-mobility brand Fotona Mobility now shipping to all EU countries
Replies: 7
Views: 737

Re: Spanish e-mobility brand Fotona Mobility now shipping to all EU countries

The Piccolo 350W scooter might become my mobility scooter when I'm older. :wink:
by SlowCo
Jan 21 2020 7:27am
Forum: Motor Technology
Topic: Chinese controller to power chinese motor
Replies: 8
Views: 715

Re: Chinese controller to power chinese motor

If you ride the top speed on 72V once in a while and not continuous then it will be fine. If you want to use the motor up to it's limits then get ferrofluid (statorade) plus a temp sensor in the motor and maybe add HubSinks. That way you can run much closer to the limit safely without damaging anyth...
by SlowCo
Jan 21 2020 4:55am
Forum: Motor Technology
Topic: Chinese controller to power chinese motor
Replies: 8
Views: 715

Re: Chinese controller to power chinese motor

According to the seller it is a 35mm height stator/magnet motor so the 1500W seem legit. They say it does 600rpm @ 48V so that would give appr. 66km/h with a 23" outer diameter tire unloaded. It will then probably do around 60km/h top speed riding on flat surface. See here for more info on the 35mm ...
by SlowCo
Jan 20 2020 6:23pm
Forum: General Discussion
Topic: Eternal outskirts of Moscow and beyond (LOTS of pics!)
Replies: 228
Views: 10148

Re: Eternal outskirts of Moscow and beyond (LOTS of pics!)

Nice trips and photo's :thumb:
Great to be able to see the outskirts of Moscow on an ebike from far away 8)
by SlowCo
Jan 20 2020 6:13pm
Forum: E-Bike Non-hub Motor Drives
Topic: Programming the Bafang Middrive BBS01+BBS02
Replies: 1178
Views: 375596

Re: Programming the Bafang Middrive BBS01+BBS02

Why did you get a 36V battery for a 48V BBS02...?