Search found 354 matches

by Jon NCal
Apr 15, 2018 7:50 pm
Forum: E-Bike General Discussion
Topic: Battery series wiring
Replies: 16
Views: 246

Re: Battery series wiring

Before you take this guy's advice, realize he doesn't seem to know what a positive and negative ends of the cells look like and also has labeled the + and - incorrectly. So how much experience does he have?
by Jon NCal
Apr 12, 2018 12:58 pm
Forum: E-Bike Non-hub Motor Drives
Topic: Charger recommendations
Replies: 5
Views: 156

Re: Charger recommendations

Take a look at the Meanwell HLG's in the classified section. Great deal @ 35.00 shipped. Quality should be commercial quality vs. the average plastic or kingpan charger.
by Jon NCal
Apr 11, 2018 1:56 pm
Forum: Alternative Energy
Topic: Cell Tower Batteries- Info
Replies: 3
Views: 125

Re: Cell Tower Batteries- Info

I do have a lot experience with these. I would charge them up and then take individual cell voltages to see if they hold a charge. They probably are somewhat damaged by not being on a charge for so long. For testing we used adjustable or automatic load banks that can keep a constant amperage and the...
by Jon NCal
Apr 05, 2018 11:34 am
Forum: E-Bike General Discussion
Topic: MAC 10T @ 36V vs 12T @ 48V??
Replies: 24
Views: 499

Re: MAC 10T @ 36V vs 12T @ 48V??

People have been repeating the idea that the motor will always overheat if you go slow. When I had a 350w hub motor bike I would just put it in the granny gear and pedal like I would without a motor and add a 200w or 250w of assist (as seen on a Cycle Analyst) with partial throttle and the crawl up ...
by Jon NCal
Mar 26, 2018 9:58 pm
Forum: E-Bike General Discussion
Topic: Undervolting cheap Chinese direct drive brushless 36V 500W?
Replies: 2
Views: 114

Re: Undervolting cheap Chinese direct drive brushless 36V 500W?

The controller will have a low voltage cutoff of around 31V, so won't work. You could use 3 12v sla's.
by Jon NCal
Mar 19, 2018 12:56 pm
Forum: E-Bike Technical
Topic: Run 48v bike on 36v
Replies: 14
Views: 343

Re: Run 48v bike on 36v

The controller may have a low voltage cutoff of around 42 volts. Sometimes there is a jumper or switch to change that setting.
by Jon NCal
Mar 10, 2018 7:20 pm
Forum: Battery Technology
Topic: Need info 36V bottle battery installation
Replies: 7
Views: 162

Re: Need info 36V bottle battery installation

This def. needs spot welder.
by Jon NCal
Mar 06, 2018 2:40 pm
Forum: E-Bike General Discussion
Topic: Want to change from SLA to lithium
Replies: 24
Views: 611

Re: Want to change from SLA to lithium

Does lithium charge ok in subzero temperatures ? No, charge at room temperature only. See: http://batteryuniversity.com/learn/article/charging_at_high_and_low_temperatures Li ion can be fast charged from 5°C to 45°C (41 to 113°F). Below 5°C, the charge current should be reduced, and no charging is ...
by Jon NCal
Mar 04, 2018 1:37 pm
Forum: E-Bike General Discussion
Topic: Want to change from SLA to lithium
Replies: 24
Views: 611

Re: Want to change from SLA to lithium

First thing I would do is figure out where you want to mount your batteries. Do you want to put them where your existing lead batteries are? Or perhaps mount to a downtube mounted bottle battery? Or rack top? Look at some of the 24v batteries on bmsbattery.com to get some ideas: https://bmsbattery.c...
by Jon NCal
Feb 12, 2018 4:29 pm
Forum: E-Bike General Discussion
Topic: Ebike not powering up help !!!!
Replies: 15
Views: 360

Re: Ebike not powering up help !!!!

markell6146 wrote:
Feb 12, 2018 4:24 pm
I think this is the one i need . XT90 Battery Harness 10AWG for 2 Packs in Parallel
No, parallel is not what you need. Parallel gives 22.2v. Series will give you 44.4v.
by Jon NCal
Feb 12, 2018 2:12 pm
Forum: E-Bike General Discussion
Topic: Ebike not powering up help !!!!
Replies: 15
Views: 360

Re: Ebike not powering up help !!!!

markell6146 wrote:
Feb 12, 2018 1:55 pm
Whats the name of this splitter ??
https://hobbyking.com/en_us/xt90-batter ... eries.html
by Jon NCal
Feb 12, 2018 1:11 am
Forum: E-Bike General Discussion
Topic: Critique my Build/Plan
Replies: 23
Views: 761

Re: Critique my Build/Plan

6S+6S+4S=16S
by Jon NCal
Feb 10, 2018 1:50 pm
Forum: Battery Technology
Topic: Was my BMS selection correct?
Replies: 8
Views: 252

Re: Was my BMS selection correct?

I recommend getting a meter called the Cycle Analyst. With that you can see how much amps or watts or you are pulling at any instant as well as voltage sag. Helps to understand what is going on. i use watt mater. Can measure 600 watt battery Cutoff. The battery is not deteriorated.but i think volta...
by Jon NCal
Feb 10, 2018 1:43 pm
Forum: E-Bike Technical
Topic: Help needed Motor does not run
Replies: 5
Views: 171

Re: Help needed Motor does not run

Are you using the CA to control the throttle, or direct throttle to controller?
by Jon NCal
Feb 09, 2018 3:25 pm
Forum: Battery Technology
Topic: Was my BMS selection correct?
Replies: 8
Views: 252

Re: Was my BMS selection correct?

I recommend getting a meter called the Cycle Analyst. With that you can see how much amps or watts or you are pulling at any instant as well as voltage sag. Helps to understand what is going on.
by Jon NCal
Jan 30, 2018 9:54 am
Forum: Battery Technology
Topic: Lipo fire - Accidentally charged 14S with BMS @ 84V - should BMS have prevented this?
Replies: 22
Views: 800

Re: Lipo fire - Accidentally charged 14S with BMS @ 84V - should BMS have prevented this?

what type of charger was it? My hobby charger has cut offs for amount of ah or time. Maybe we should be using smarter chargers?
by Jon NCal
Jan 27, 2018 12:49 pm
Forum: Battery Technology
Topic: Battery Voltage Drop
Replies: 2
Views: 142

Re: Battery Voltage Drop

Lead acid batteries? How old are they and have they been maintained, ie kept charged up?
by Jon NCal
Jan 26, 2018 1:09 pm
Forum: E-Bike Technical
Topic: Thinking about building an e-bike, would love expert advice
Replies: 7
Views: 411

Re: Thinking about building an e-bike, would love expert advice

Play around with the motor simulator on Grin Tech site. It will give you some idea of the energy needed at different speeds and what size battery you might want to get. You can see the wh per mile and total range in the lower right box: http://www.ebikes.ca/tools/simulator.html
by Jon NCal
Jan 18, 2018 1:10 pm
Forum: General Discussion
Topic: Need help with battery design for Enduro frame and suggestion for BMS
Replies: 3
Views: 253

Re: Need help with battery design for Enduro frame and suggestion for BMS

You can go with lipo or have a custom 18650 pack built. Also, em3ev has 20S10P batteries, but with ~100A peaks rather than 200A: https://em3ev.com/shop/em3ev-72v-20s10p ... ry-pack-1/
by Jon NCal
Jan 17, 2018 1:47 pm
Forum: General Discussion
Topic: Need help with battery design for Enduro frame and suggestion for BMS
Replies: 3
Views: 253

Re: Need help with battery design for Enduro frame and suggestion for BMS

VRUZEND not for high power designs at the moment. Only 3.5A per cell limit (10P = 35A limit).
by Jon NCal
Jan 16, 2018 12:32 pm
Forum: E-Bike General Discussion
Topic: opinions about this 500watt model & hill performance
Replies: 7
Views: 418

Re: opinions about this 500watt model & hill performance

I think it would probably do fine. I looked at the review video (skip to ride at 21+ mins in) and the rider did not seem to have any issue going up a hill from a standstill (on grass?). Maybe contact the reviewer Court with your question?
by Jon NCal
Jan 15, 2018 1:51 pm
Forum: General Discussion
Topic: Wireless Connection from House into Garage
Replies: 7
Views: 336

Re: Wireless Connection from House into Garage

The units we use that just plug in to the AC socket and transmit through the house wiring (and one to the router) provide ethernet are TP-Link and work well and easy to install and cheap.
by Jon NCal
Jan 13, 2018 11:38 am
Forum: General Discussion
Topic: Wireless Connection from House into Garage
Replies: 7
Views: 336

Re: Wireless Connection from House into Garage

There's some ethernet devices that work through power lines. Would depend on your wiring for your buildings.
by Jon NCal
Dec 30, 2017 7:56 pm
Forum: Battery Technology
Topic: Multistar charger
Replies: 18
Views: 1036

Re: Multistar charger

I think he mentioned making a 12S 60Ah pack from 6S 20Ah packs.