Search found 347 matches

by pengyou
Jul 26 2021 9:10pm
Forum: Large EV General Discussion
Topic: Electric tractor motors
Replies: 17
Views: 961

Electric tractor motors

I have some property in the high plains desert. I would really benefit from having a motorized 4 wheel platform that would let me carry up to 4,000 pounds (500 gallons of water). It does not need to go more than 5 mph, and does not need to climb more than 20 degrees. Tires will be about 24" in ...
by pengyou
Jul 25 2021 6:58am
Forum: Battery Technology
Topic: 18650 vs prismatic - which is safer?
Replies: 36
Views: 1036

Re: 18650 vs prismatic - which is safer?

Sorry hear about your scooter, any idea what might have happened, accident damage, old cells, badly out of balance, ect , this second battery fire on here in last couple days, be interested see picture of scooter :es: The battery was only 4 weeks old. My school hauled away the carcass (the only thi...
by pengyou
Jul 22 2021 8:34am
Forum: Battery Technology
Topic: 18650 vs prismatic - which is safer?
Replies: 36
Views: 1036

18650 vs prismatic - which is safer?

Are the 18650 cell packs safer than prismatic? Last night, my scooter caught on fire while it was being charged. Fire burned...all that was left was the steel in the frame and the hubs. I had a new battery that was prismatic instead of 18650 :(
by pengyou
Jun 18 2021 11:36pm
Forum: E-Vehicles General Discussion
Topic: Limit on battery size?
Replies: 1
Views: 441

Limit on battery size?

I think I am getting the run around with my local escooter shop. I have an electric scooter (the old fashion style that you sit on and has handlebars). It has a 48v mother with a 15a life battery. I want to put a 40a 48v battery in the scooter and change the controller as well. The guy that owns the...
by pengyou
May 17 2021 6:38pm
Forum: Large EV General Discussion
Topic: Intricancies of 2+ motors
Replies: 14
Views: 1881

Re: Intricancies of 2+ motors

Thank you! Sorry for the mistake. I meant, eliminate the drive shaft. Yes, I am still looking at a differential for each pair of wheels, with one motor attached to each differential. I have read on other forums that 2 controllers in the same vehicle need some way to be managed together, perhaps some...
by pengyou
May 15 2021 9:00pm
Forum: Motor Technology
Topic: Plans for a diy controller
Replies: 2
Views: 186

Plans for a diy controller

I have a 48 volt, 500 w ebike. The motor is capable of handling 60v - probably more efficiently. I was thinking that if there are any diy kits - or well documented plans, I would like to try to build a controller. I have not done anything like this in 30 years. Do things still need tubes? hehehehe j...
by pengyou
May 15 2021 6:48am
Forum: Large EV General Discussion
Topic: Intricancies of 2+ motors
Replies: 14
Views: 1881

Intricancies of 2+ motors

I have read a number of posts here about 2 motors on a 2 wheeled vehicle. My questions here are about a 4 wheeled vehicle. The Tesla pick-up has something like 3 motors up front and 4 in the back, give or take. I would like to convert a small 4x4 vehicle like a Suzuki Tracker. If I could put one mot...
by pengyou
Aug 10 2020 3:32am
Forum: EScooters/EMotorcycles
Topic: 18" wheel on a scooter?
Replies: 1
Views: 400

18" wheel on a scooter?

I am looking at a scooter with 18" wheels. Most of that kind have 16" wheels. A lot of companies make 16" wheels with the motor rigidly mounted in the center of the wheel. The selection for 18" is not nearly as big. Can an 18" wheel be made electric using spokes with the mot...
by pengyou
Aug 07 2020 10:13pm
Forum: E-Vehicles General Discussion
Topic: A help me upgrade my scooter
Replies: 2
Views: 450

Re: A help me upgrade my scooter

Thanks. Good suggestions. Another MUST: the batteries will go. Some shops will let me order the scooter without a battery. I would not trust the motor with a controller that would throw more electricity at it.
by pengyou
Aug 07 2020 10:00pm
Forum: E-Vehicles General Discussion
Topic: A help me upgrade my scooter
Replies: 2
Views: 450

A help me upgrade my scooter

48V350W-EEC-Approved-Fashion-Adult-Electric-Pedal-Scooter-2-Wheel-Electric-Bike-ES-022-.jpg This is the smallest scooter that is comfortable for me. Arthritus in the hip ruled out pedaling a long time ago. 350 Watts at 48 volts just doesn't cut it. Larger scooters with more power are available but ...
by pengyou
Jun 07 2020 5:10am
Forum: EScooters/EMotorcycles
Topic: E-scooter for cross country
Replies: 6
Views: 398

Re: E-scooter for cross country

Thank you both! That is why I asked here before I continued on.
by pengyou
Jun 07 2020 2:34am
Forum: EScooters/EMotorcycles
Topic: E-scooter for cross country
Replies: 6
Views: 398

E-scooter for cross country

I have fought with my hip for more than 15 years and finally given up...bicycling will have to wait until I get a new hip :( I live in Beijing and will be moving to Chengdu this summer. The road trip is about 1,200 miles. I am entertaining the notion of riding a scooter there. There are 5 cities tha...
by pengyou
Feb 24 2020 5:20am
Forum: Battery Technology
Topic: What is wrong with this product?
Replies: 15
Views: 3411

What is wrong with this product?

https://www.aliexpress.com/item/4000499645696.html?spm=a2g0o.productlist.0.0.1d2c37bdpg3CrM&s=p&algo_pvid=9ddf60ab-f2cb-4d10-8cc1-6c6abf6d1046&algo_expid=9ddf60ab-f2cb-4d10-8cc1-6c6abf6d1046-0&btsid=0ab6f82415825386823814541e4f8c&ws_ab_test=searchweb0_0,searchweb201602_,searchweb...
by pengyou
Dec 05 2019 6:46am
Forum: E-Vehicles General Discussion
Topic: 4 wheel drive ATV as utility vehicle
Replies: 8
Views: 1762

Re: 4 wheel drive ATV as utility vehicle

Thank you for the advice. I will probably take all of it at one time or another :mrgreen: I will start with an ATV because it will help me get started - it will fit into my van - no trailer needed, and will work as a multifunction vehicle to get plans made, soil samples taken, snow cleared until pat...
by pengyou
Dec 02 2019 7:08am
Forum: E-Vehicles General Discussion
Topic: 4 wheel drive ATV as utility vehicle
Replies: 8
Views: 1762

Re: 4 wheel drive ATV as utility vehicle

https://daymak.com/offroad/beast-awd-atv.html Great ad - thank you! I like the sounds of that - 2 x 1,000 watt motors - redundancy is always good when you are off the beaten path. More than likely one mounted up front for the front wheels and one for the back wheels, then 2 running together when mo...
by pengyou
Dec 01 2019 5:09am
Forum: E-Vehicles General Discussion
Topic: 4 wheel drive ATV as utility vehicle
Replies: 8
Views: 1762

4 wheel drive ATV as utility vehicle

atv.jpg Just to be clear, I am talking about this kind of atv - some people call it a quad cycle. I am looking for an electric powered vehicle like this to help survey and develop a piece of land that I bought. It does not have to be fast - 15 mph is adequate because it will seldom be on pavement (...
by pengyou
May 27 2019 3:56am
Forum: General Discussion
Topic: How stable will this escooter be?
Replies: 6
Views: 929

Re: How stable will this escooter be?

Hmmmm most ebikes and scooters here have 10-12" wheels. I think mine has 16", but not much improvement. That is one of the main reasons why I am thinking about a third wheel.
by pengyou
May 26 2019 9:38am
Forum: General Discussion
Topic: How stable will this escooter be?
Replies: 6
Views: 929

How stable will this escooter be?

https://item.taobao.com/item.htm?spm=a230r.1.14.25.262a6052fGQINz&id=581009613713&ns=1&abbucket=17#detail (this is not meant to be an advertisement, I am not selling anything) I was just in an accident on my ebike - tried to stop when I saw some rebar laying across the road but couldn't ...
by pengyou
Mar 28 2019 6:48am
Forum: Large EV General Discussion
Topic: Electric bus
Replies: 1
Views: 1248

Electric bus

I tried to search this forum for electric bus, but the term "bus" is used in many aspects of electric vehicles. I am shopping for a used school bus now to convert into an RV. As I was trying to work around the space that the engine and drive train take up in these I thought, "if this ...
by pengyou
Feb 01 2019 6:41am
Forum: EBike Technical
Topic: Matching controller and motor
Replies: 4
Views: 431

Matching controller and motor

https://item.jd.com/36211367093.html#crumb-wrap Excuse the Chinese - my question probably doesn't need an understanding of the words but a look at the wiring on the motor. I am thinking about buying this motor for my 16" wheeled scooter, getting the 48v 1000w version. It seems to have 3 control...
by pengyou
Feb 01 2019 6:26am
Forum: EBike Technical
Topic: 48v 350w to 48v 1000w
Replies: 3
Views: 572

Re: 48v 350w to 48v 1000w

Thanks to both of you! It is a hub motor. I have not seen any available in China that are geared hub motors for this kind of scooter.
by pengyou
Jan 17 2019 5:35am
Forum: EBike Technical
Topic: 48v 350w to 48v 1000w
Replies: 3
Views: 572

48v 350w to 48v 1000w

I would like to upgrade my ebike to a more powerful motor, yet stay at 48v. My main complaint is that if I go up the slightest incline now, the bike slows down considerably...moderate headwind, the same...carrying 50 pounds of groceries the same. I am going to upgrade the controller...is there somet...
by pengyou
Sep 28 2018 7:51am
Forum: EScooters/EMotorcycles
Topic: Are two batteries better than one?
Replies: 12
Views: 1294

Re: Are two batteries better than one?

The size and shape is going to be the difficult issue.
by pengyou
Sep 28 2018 7:01am
Forum: EScooters/EMotorcycles
Topic: Are two batteries better than one?
Replies: 12
Views: 1294

Re: Are two batteries better than one?

Thank you! That is very helpful. It looks like, if I am going to do this, most likely will have to do it myself. Even though I am a novice, I don't think I would trust the shops around here to be so conscientious building a battery like that.
by pengyou
Sep 27 2018 9:43am
Forum: EScooters/EMotorcycles
Topic: China’s largest electric scooter maker
Replies: 10
Views: 1823

Re: China’s largest electric scooter maker

There is still lots of cheap here :(