Search found 2816 matches

by e-beach
Jan 15 2021 8:49pm
Forum: Battery Technology
Topic: 11s 20ah and series with 12s20ah pack
Replies: 4
Views: 63

Re: 11s 20ah and series with 12s20ah pack

Are they identical cell types? Or better yet, will the smaller pack be easily able to handle your current draw?

If both backs can handle your current draw, it should be ok to serialize them. It will just end up a 23s pack.

:D :bolt:
by e-beach
Jan 15 2021 6:34pm
Forum: E-Bike Non-hub Motor Drives
Topic: Mid drive noob question
Replies: 3
Views: 94

Re: Mid drive noob question

BDamari wrote:
Jan 15 2021 4:25pm
Hi guys, I have experience with hub motors but very new to mid drives (the motorcycle grade stuff)
.....
This starts off a bit confusing to me. Are you building a bicycle or a motorcycle?

:D :bolt:
by e-beach
Jan 15 2021 6:31pm
Forum: Alternative Energy
Topic: Ebike batteries to help charge cabin..
Replies: 10
Views: 322

Re: Ebike batteries to help charge cabin..

First things first on a project like this it to know the specs of the electronics you are using.

:D :bolt:
by e-beach
Jan 15 2021 2:49pm
Forum: Alternative Energy
Topic: Ebike batteries to help charge cabin..
Replies: 10
Views: 322

Re: Ebike batteries to help charge cabin..

Ok, lets change direction a bit because your battery once connected isn't going to automatically discharge 100A to your system.

So, what is your actual maximum amp draw when everything is turned on?

:D :bolt:
by e-beach
Jan 15 2021 1:57pm
Forum: Motor Technology
Topic: Hall sensor
Replies: 10
Views: 282

Re: Hall sensor

Partizan kalo wrote:
Jan 15 2021 12:19pm
thank you very much. I've learned a lot from you. it works fine now. wish you all the best. Ss41
:bigthumb:
by e-beach
Jan 15 2021 1:51pm
Forum: Alternative Energy
Topic: Ebike batteries to help charge cabin..
Replies: 10
Views: 322

Re: Ebike batteries to help charge cabin..

Then you have to do better then "think" that your MPPT is 20 or 30 amps. You have to "Know" what the actual maximum is.

What does the manual say the maximum input current is? If you don't have the manual, what does the manufacture say it is?

:D :bolt:
by e-beach
Jan 14 2021 10:05pm
Forum: Large EV General Discussion
Topic: 1967 Ford Econoline Leaf conversion
Replies: 2
Views: 80

Re: 1967 Ford Econoline Leaf conversion

I am so jealous! :lol: Looks like a great set of old bones to make into something fun!!! :bigthumb: Please keep us informed on YouTube and ES.

:D :bolt:

Edit:
by e-beach
Jan 14 2021 1:33pm
Forum: Alternative Energy
Topic: Generating Power 24/7 by using Tides
Replies: 19
Views: 356

Re: Generating Power 24/7 by using Tides

Pile walls can work. They are still effective around the Santa Monica Pier after 80+ years. However they are sand and rocks that need to be maintained or they eventually degrade due to tidal forces. The concept looks like it would generate electricity, the question is if it would be enough to justif...
by e-beach
Jan 13 2021 5:12pm
Forum: E-Bike General Discussion
Topic: Can I charge my ebike in parallel...
Replies: 8
Views: 751

Re: Can I charge my ebike in parallel...

one cell goes bad? Instead of the BMS watching just one cell, it is watching the paralleled cells. Will the good cell mask issues of the bad cell and cause an issue? Yes and no. Upon charging, the BMS might think the good/bad sell group is fine and balance for the given voltage. But, upon discharge...
by e-beach
Jan 12 2021 8:50pm
Forum: E-Bike General Discussion
Topic: Longer ride time
Replies: 10
Views: 241

Re: Longer ride time

Well, it would have been better to purchase a duplicate battery to what you have. But since you didn't, you either have to make a 48v battery out of the 36v or a 36v out of the 48v battery. You did not reference your motor or controller but because you stated you have a 48v system originally, then y...
by e-beach
Jan 11 2021 12:05pm
Forum: E-Bike General Discussion
Topic: Hub motors with 10mm axles
Replies: 9
Views: 262

Re: Hub motors with 10mm axles

.... Are the yescom you are referring to the DD or geared hubs? .. Yes my motors are indeed 10mm. The kits are inexpensive and durable. I have attempted to file down the motor axles, but that steel is really hard. So, I have had to file my dropouts open, both front and back. This one of the reasons...
by e-beach
Jan 11 2021 10:50am
Forum: E-Bike General Discussion
Topic: Hub motors with 10mm axles
Replies: 9
Views: 262

Re: Hub motors with 10mm axles

It is the frames that have 9.5mm dropouts that you need to be aware of. As for the Yescomusa motors I run, they have 10mm axles.

:D :bolt:
by e-beach
Jan 03 2021 10:10am
Forum: E-Bike Technical
Topic: Re wiring diagram for a 5 to 1 wiring harness
Replies: 2
Views: 256

Re: Re wiring diagram for a 5 to 1 wiring harness

So are you talking only Hall Sensor wires or phase and battery wires as well?

:D :bolt:
by e-beach
Dec 30 2020 11:21pm
Forum: General Discussion
Topic: Legends dropping like flies
Replies: 413
Views: 69167

Re: Legends dropping like flies

RIP Mary Ann....... :(
Mary Ann.png
Mary Ann.png (198.31 KiB) Viewed 169 times
by e-beach
Dec 30 2020 10:04pm
Forum: E-Bike General Discussion
Topic: High amp draw
Replies: 16
Views: 364

Re: High amp draw

jay7264 wrote:
Dec 30 2020 9:00pm
Internally shorted.
Bad news. :evil:

Have you tested the mosfets?
by e-beach
Dec 30 2020 8:25pm
Forum: E-Bike General Discussion
Topic: High amp draw
Replies: 16
Views: 364

Re: High amp draw

Inside the motor or outside via the phase wire?
by e-beach
Dec 30 2020 8:05pm
Forum: E-Bike General Discussion
Topic: High amp draw
Replies: 16
Views: 364

Re: High amp draw

Ok, before the motor recommendations, how do you know it is the motor and not the phase wires? Also, did you test your fets? As for motors, did you contact ebikes.ca ? https://ebikes.ca/shop/electric-bicycle-parts/motors.html They might have what you want. Also, I have over 16,000 miles on my 2 yesc...
by e-beach
Dec 30 2020 1:05pm
Forum: E-Bike General Discussion
Topic: High amp draw
Replies: 16
Views: 364

Re: High amp draw

The reason I was wondering about geting your bike wet is that water could cause a short. If you have been riding in the wet, let the bike dry out for a week or until it seems totally dry. If the bike has not gotten wet, then start the testing as soon as you are ready. I agree with Voltron that you w...
by e-beach
Dec 30 2020 11:45am
Forum: E-Bike General Discussion
Topic: High amp draw
Replies: 16
Views: 364

Re: High amp draw

Have you been riding in the rain or snow?

:D :bolt:
by e-beach
Dec 29 2020 10:48pm
Forum: Battery Technology
Topic: C rating for low power 18650s
Replies: 43
Views: 793

Re: C rating for low power 18650s

Which graph are you speaking of. The one where the low discharge is -10c?

:D :bolt:
by e-beach
Dec 29 2020 8:06pm
Forum: Battery Technology
Topic: C rating for low power 18650s
Replies: 43
Views: 793

Re: C rating for low power 18650s

Hillhater wrote:
Dec 29 2020 7:35pm
Odd discharge curve shown there ?
......
https://www.imrbatteries.com/content/pa ... 18650a.pdf

:D :bolt:
by e-beach
Dec 29 2020 6:49pm
Forum: Battery Technology
Topic: C rating for low power 18650s
Replies: 43
Views: 793

Re: C rating for low power 18650s

...These cells are 3AH each, so I believe 10p * 3AH = 30A at 1C or 60A at 2C. I figured I should keep it at 1/2 of the manufacturer's limit to be safe. So that would be 30A. BTW, I will be using a Trek 4500 like one of your builds, but with a 1500W leaf rear hub motor. My bad. :oops: Thanks for the...
by e-beach
Dec 29 2020 6:02pm
Forum: Battery Technology
Topic: C rating for low power 18650s
Replies: 43
Views: 793

Re: C rating for low power 18650s

The specs rate those cells at a out 2C. So it really depends on your controller. If it is a 20 amp controller, then your 2C max will be with a ??S 10P pack.

Better to be safe then have a battery fire.

:D :bolt:
by e-beach
Dec 29 2020 11:06am
Forum: E-Vehicles General Discussion
Topic: Motor Hall Fault
Replies: 44
Views: 646

Re: Motor Hall Fault

QS Motor Hall Sensor Test
QS Motor Hall Sensor test.JPG
QS Motor Hall Sensor test.JPG (82.34 KiB) Viewed 49 times
by e-beach
Dec 28 2020 8:36pm
Forum: E-Bike General Discussion
Topic: Can I charge my ebike in parallel...
Replies: 8
Views: 751

Re: Can I charge my ebike in parallel...

Quite an original setup you have going on there. The answer to your parallel question is yes. Provided each battery is at the same voltage when you start charging. Otherwise the two batteries will try to self balance the voltages causing an inrush of current from one battery pack to the other. That ...