Search found 20 matches

by drdrs
Aug 16 2019 12:31pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 181
Views: 10408

Re: Serious FOCer (84V VESC 6 based controller)

I run a 14s5p LG HG2 battery with a 150 amp BMS.
by drdrs
Aug 15 2019 10:59pm
Forum: Motor Technology
Topic: Serious FOCer (84V VESC 6 based controller)
Replies: 181
Views: 10408

Re: Serious FOCer (84V VESC 6 based controller)

Thanks for all the work you are putting into this. It looks very promising. I'm very interested in helping out with the Little FOCer beta testing. I've got a 10 Hz datalogging dashboard on my bike for my ASI 2000 and it should be straightforward to configure it to pull road data from this controller.
by drdrs
Aug 10 2019 9:59pm
Forum: Battery Technology
Topic: ENNOID-BMS for 48V to 400V lithium-ion battery pack
Replies: 120
Views: 11073

Re: BMS for 48V to 400V lithium-ion battery pack

Those photos are very helpful and I can see that this connection scheme is unique. Most e-bike battery packs I see have the cells "flipped" for each of the parallel groups and have spot welded connections on both sides of the battery pack. This design and the Alta pack have all cells in the same phy...
by drdrs
Aug 10 2019 8:36pm
Forum: Battery Technology
Topic: ENNOID-BMS for 48V to 400V lithium-ion battery pack
Replies: 120
Views: 11073

Re: BMS for 48V to 400V lithium-ion battery pack

This is a very nicely integrated design.

Can you provide any more detail about the interconnections? Does the large red circuit board provide the load current paths for the batteries or only the balance voltages and balancing current paths?
by drdrs
Jul 15 2019 7:44pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 5kW Custom Hard-Tail Commuter
Replies: 9
Views: 811

Re: 5kW Custom Hard-Tail Commuter

If you want smooth and awesome wheelies try upgrading to a BAC4000. The 2000 will do 10KW but the torque off the line is really limited by the 144 phase amps or whatever. A controller that allows a higher phase current is definitely on the upgrade path. The BAC 4000 should double the phase amps com...
by drdrs
Jul 15 2019 7:32pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 5kW Custom Hard-Tail Commuter
Replies: 9
Views: 811

Re: 5kW Custom Hard-Tail Commuter

guancio wrote:
Jul 10 2019 2:17pm
Have you thought about using the german forumscontroller on you Arduino mega?
I wasn't aware of the project but it looks very interesting and also feature-rich. I'll look at the code base for ideas.
by drdrs
Jul 15 2019 7:26pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 5kW Custom Hard-Tail Commuter
Replies: 9
Views: 811

Re: 5kW Custom Hard-Tail Commuter

Really interesting project ! Especially your custom Arduino / TFT display with data connection to BMS & ASI controller. :thumb: Personally I find it strange that no other commented on your bike. Especially since this really a different beast compared to the 20th version of a Stealth bike clone runn...
by drdrs
Jul 08 2019 1:56pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 5kW Custom Hard-Tail Commuter
Replies: 9
Views: 811

Re: 5kW Custom Hard-Tail Commuter

For the bicycle, I wanted a display that could communicate with both the battery and the controller over a digital protocol. I was especially interested in reading the motor phase current and the cell-row level voltages. The display has taken many iterations and currently I'm using an Arduino Mega a...
by drdrs
Jul 07 2019 1:26pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 5kW Custom Hard-Tail Commuter
Replies: 9
Views: 811

Re: 5kW Custom Hard-Tail Commuter

The battery for the bike uses 14s5p LG HG2 cells with the Vruzend battery caps and the Energus Tiny BMS 150 amp BMS. The top current I've observed so far is about 120 amps so the electrical power output is just above 5.5 kW. Since this was my first battery, I laid it out in a very simple configurati...
by drdrs
Jul 06 2019 5:44pm
Forum: E-Bike Build Threads / Photos & Video
Topic: 5kW Custom Hard-Tail Commuter
Replies: 9
Views: 811

5kW Custom Hard-Tail Commuter

This is a bike that has been under evolution for about 2 years now. It started as a KHS Alite from Luna Cycles with a Hailong pack and a BBS02. Now it has - Crystalyte 3540 rear hub motor - ASI BAC 2000 (green and black) controller - Custom 14s5p HG2 battery with Energus Tiny BMS - Custom Arduino/TF...
by drdrs
Jul 01 2019 11:58pm
Forum: Battery Technology
Topic: Generic-Chinese-Bluetooth-BMS-communication-protocol
Replies: 32
Views: 5368

Re: Generic-Chinese-Bluetooth-BMS-communication-protocol

Are there any posts showing how to send these commands to the BMS from a laptop (os x/linux/windows) over bluetooth?
by drdrs
Jun 15 2019 1:31pm
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 219
Views: 32642

Re: 5-16S Smart Tiny BMS preorder - 30/150/750A rated

I'm not aware of a display besides the LED SOC one by Energus. I decided to build my own that talks to an ASI controller and the Tiny BMS using an Arduino Mega and a TFT display shield by Adafruit. I'll get around to posting it in the next few weeks.
by drdrs
Jun 12 2019 1:23am
Forum: Items for Sale - New
Topic: Compact Field Oriented Controller, ASI + Grin, limited run
Replies: 1219
Views: 215122

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

I put together a few examples that communicate with an ASI controller using their MODBUS implementation on a computer using a python installation along with some example log outputs, byte listings, and descriptions. In the future, I'll also put up some arduino code that performs the same thing. http...
by drdrs
May 29 2019 10:18pm
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 219
Views: 32642

Re: 5-16S Smart Tiny BMS preorder - 30/150/750A rated

Currently I have the BMS set to start balancing at 3.5V, finish charging at 4.1V, and tolerate no more than 15mV max-min difference between cells. I charge with a meanwell hlg-320H-54a CC-CV tuned so that the current drops to the 1A BMS cutoff at the same time the cells are reaching 4.1V. When the c...
by drdrs
May 29 2019 5:47pm
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 219
Views: 32642

Re: 5-16S Smart Tiny BMS preorder - 30/150/750A rated

I've been running one of these for several weeks on a 14s5p battery and I'm very happy with it. At the top of charge the cells are usually within 10mV. The documentation and communication are the main selling points in my opinion. Because of this, I was able to create a custom charging app on my com...
by drdrs
May 05 2019 7:14pm
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 219
Views: 32642

Re: 5-16S Smart Tiny BMS preorder - 30/150/750A rated

Since the Tiny BMS communications are so well documented, I've put together a read-only monitor for the Tiny BMS that I use during charging. You'll need a python 3 install with the Bokeh and PyModbus libraries.

https://github.com/dsoto/Tiny-BMS-Monitor
BMS-app-screenshot.png
by drdrs
Mar 31 2019 1:24pm
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 219
Views: 32642

Re: 5-16S Smart Tiny BMS preorder - 30/150/750A rated

Thanks for the update! If you get in contact with them again, please tell them to post that "User Manual" somewhere, because I can't find it anywhere. I was able to find pdf documentation, app links, and communication protocols on the pages for the 2 BMS models. https://www.energusps.com/shop/produ...
by drdrs
Nov 25 2018 10:25pm
Forum: E-Bike Technical
Topic: Is there a connector wiki or guide?
Replies: 4
Views: 312

Re: Is there a connector wiki or guide?

Grin has one with the most popular connectors.

https://www.ebikes.ca/learn/connectors.html
by drdrs
Aug 05 2018 9:51pm
Forum: E-Bike Technical
Topic: New em3ev batterý pack
Replies: 71
Views: 8832

Re: New em3ev batterý pack

Excellent point. I should have mentioned that the vendor couldn't supply a specification sheet for the BMS nor could they offer a way to change the BMS configuration. The 30Q cells in a 14s6p configuration can deliver 90A, well above the 60A vendor limit. I was hoping an intrepid battery owner had d...
by drdrs
Aug 02 2018 6:03pm
Forum: E-Bike Technical
Topic: New em3ev batterý pack
Replies: 71
Views: 8832

Re: New em3ev batterý pack

Does anyone have the BMS specifications or know how to change the BMS firmware settings? I'm interested in raising the output current limit over 60A.