Search found 1304 matches

by circuit
Sep 30 2019 8:56am
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 219
Views: 33620

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

Well, people, who are using Linux as their daily driver, usually don't mind the pain, they enjoy it!
by circuit
Sep 30 2019 7:34am
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 219
Views: 33620

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

Note that bluetooth can also be used for PC connectivity. You just need to pair your devices (virtual com port will appear in device manager).
by circuit
Sep 28 2019 8:59am
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 219
Views: 33620

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

Hello everyone. If you want to debug your battery pack, there's an "official" way. BMS collects statistics and many limit values, including min cell voltage, max voltage, max current and max voltage difference between cells. So, before testing, simply use windows app to clear statistics and have a r...
by circuit
Jun 05 2019 10:19am
Forum: E-Bike General Discussion
Topic: variable regen throttle and controller for ebikes.
Replies: 34
Views: 5721

Re: variable regen throttle and controller for ebikes.

Not what one would call competetively priced...
by circuit
May 24 2019 11:28pm
Forum: Motor Technology
Topic: Steel-geared hub motor?
Replies: 126
Views: 22668

Re: Steel-geared hub motor?

These are not helical and wil be loud as hell...
by circuit
May 23 2019 8:32am
Forum: Items Wanted
Topic: Wanted: 6 inch hub motor (pics)
Replies: 1
Views: 310

Wanted: 6 inch hub motor (pics)

Need one like this, in EU.
Or, ideally, with pneumatic tire.

Image
Image
by circuit
Apr 18 2019 11:26pm
Forum: Motor Technology
Topic: Steel-geared hub motor?
Replies: 126
Views: 22668

Re: Steel-geared hub motor?

I used a TIG machine (which is a precision instrument in welding world) to place a bead around shaft.
by circuit
Apr 18 2019 2:06pm
Forum: Motor Technology
Topic: Steel-geared hub motor?
Replies: 126
Views: 22668

Re: Steel-geared hub motor?

I have welded my bafang. All fine.
by circuit
Apr 13 2019 6:01am
Forum: Motor Technology
Topic: STSPIN devboard
Replies: 0
Views: 166

STSPIN devboard

Did not find any references on the forums. Anyone tried ST's STSPIN3201 devboard? It has a cheap hardware, fully capable of sensorless startup and torque control for traction applications. I am now playing with their motor control workbench, and got the motor spinning, but just barely. It stops when...
by circuit
Nov 26 2018 5:35pm
Forum: Motor Technology
Topic: Turnigy Rotomax good pair with PowerVelocity controller?
Replies: 9
Views: 1504

Re: Turnigy Rotomax good pair with PowerVelocity controller?

Why dont you just source one of the purpose made 48v "Altermotors" that GM fitted to various vehicles over the past 10+ years. They are 10-15 kW depending on the model year, and are readily available cheaply in dismantler yards. https://endless-sphere.com/forums/viewtopic.php?t=31584 Much simpler a...
by circuit
Nov 24 2018 12:11pm
Forum: Motor Technology
Topic: Turnigy Rotomax good pair with PowerVelocity controller?
Replies: 9
Views: 1504

Re: Turnigy Rotomax good pair with PowerVelocity controller?

Rotomax 150cc is the best RC motor I have seen: perfectly balanced and has an induction of 17μH, which is perfect for ebike application. I had a predecessor Turnigy CA-120 (5μH), which was very difficult to drive, controllers went in smoke, etc: https://www.youtube.com/watch?v=Gl4X1dRAdQQ I am writi...
by circuit
Oct 29 2018 3:22am
Forum: Battery Technology
Topic: Analog fuel gauge for Emus BMS?
Replies: 37
Views: 4985

Re: Analog fuel gauge for Emus BMS?

Hi,

I am no longer with the company and there may be changes I am not aware of, however thermal gauges should work fine.
Please contact support@emusbms.com for more details.
by circuit
Jul 11 2018 6:58am
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 219
Views: 33620

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

Yes, charging current is lower, as it is handled by single mosfet. To gain higher current, you will need external switch (relay or solid state relay). Internal current sensor can still be used for currents up to 150A. I have just discussed this non-start issue with our engineer and he confirmed ther...
by circuit
Jul 11 2018 6:33am
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 219
Views: 33620

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

Regarding current handling, there are 3 options: 1. "30A" model with integrated shunt for currents up to 30A. 2. "150A" model with integrated hall sensor for currents up to 150A. 3. "150A" model with external current sensor. Once this sensor is connected, BMS will detect it and allow higher current ...
by circuit
Jul 11 2018 3:30am
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 219
Views: 33620

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

It may abort charging in case charger voltage is slightly too high and cells go over their preset voltage. To fix, decrease your charger's voltage slightly to meet exact voltage per cell. Note that BMS can't change voltage of charger or battery output, it only switches either on or off. So if your c...
by circuit
Jun 29 2018 3:26pm
Forum: Items for Sale - New
Topic: 5-16S Smart Tiny BMS preorder - 30/150/750A rated
Replies: 219
Views: 33620

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

Hi Circuit, I sent you an email two days ago from your web site's contact page, regarding my problem with the app ebike analyzer that won't stay open. I am waiting for your reply so that I can place my order for a TinyBMS and accessories. Are you still selling them? Hi Altair, Your email was likely...
by circuit
May 09 2018 8:53am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 961
Views: 109526

Re: kWeld - "Next level" DIY battery spot welder

Just a quick feedback: ordered this welder for our CNC machine. All good so far!
We use ultracaps with CCCV charger as power source.

Thanks for your effort and bringing a good product to market.
by circuit
May 09 2018 8:40am
Forum: Battery Technology
Topic: BMS for 13S Battery capable of handling 300A discharge
Replies: 9
Views: 1587

Re: BMS for 13S Battery capable of handling 300A discharge

Really sorry for advertising project on several threads, but since this has not been mentioned here, have a look at this TinyBMS: https://www.energusps.com/shop/product/tiny-bms-s516-150a-750a-36 Up to 750 amps if used with current sensor. You can connect external contactor of use integrated high si...
by circuit
May 09 2018 8:36am
Forum: Battery Technology
Topic: BMS
Replies: 3
Views: 408

Re: BMS

Description matches EMUS BMS. It is available from other suppliers, like Faktor in Germany. For 16s 150 I would suggest to check my project: https://www.energusps.com/shop/product/tiny-bms-s516-150a-750a-36 Fully configurable, upgradable firmware, logs, flexible power switch control, bluetooth and A...
by circuit
May 09 2018 8:31am
Forum: Battery Technology
Topic: Overcoming Zener Knee for BMS
Replies: 53
Views: 2681

Re: Overcoming Zener Knee for BMS

Try Energus TinyBMS, it supports very low cell voltages, as long as overall pack voltage is above 9V. Also compatible with ultracaps.
https://www.energusps.com/shop/product/ ... 0a-750a-36

Up to 750 amps with external sensor.
Up to 16s though.
by circuit
Apr 13 2018 5:20am
Forum: Items Wanted
Topic: Single pouch cell 4Ah
Replies: 0
Views: 347

Single pouch cell 4Ah

Image

Dimensions 40x140x6.5mm, 4.0 Ah.
Can be used and lightly degraded.

Or I can sell 19 cells like this..
by circuit
Apr 07 2018 2:03pm
Forum: Motor Technology
Topic: What I wish I understood before buying my hubmotor
Replies: 3
Views: 823

Re: What I wish I understood before buying my hubmotor

Faster winding requires higher phase current. It does not necessarily mean higher power, if battery current is limited to same levels.
by circuit
Mar 31 2018 3:06am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1156
Views: 107066

Re: bluetooth BMS?

48 volts won't get me 120 mph. 48 volts probably won't get me 35mph... I don't want to look rude, but you seem to have some huge gaps in fundamental knowledge. While 120mph may be difficult with, say, 12V, it is more than doable with 48V, if you use your brain. To americans more power somehow alway...
by circuit
Mar 29 2018 3:58am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1156
Views: 107066

Re: bluetooth BMS?

flippy, but still, wouldn't it be easier to you and cheaper to your customer, if you modified the motor instead of replacing everything?
It does need some motor knowledge to understand what should be done, but after that it's a couple hour job.
by circuit
Mar 29 2018 3:31am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1156
Views: 107066

Re: bluetooth BMS?

In addition, it is much easier to rewind or reconnect existing windings to make things fast. First and easiest option is to connect it from Y to ∆. This will give an increase of x1.73. But not all motors are compatible, testing needed. Second option is to cut some poles and reconnect from series to ...