Search found 88 matches

by usertogo
Nov 30 2018 12:44pm
Forum: Battery Technology
Topic: Revolutionary BMS & Battery Interoperability Standard
Replies: 0
Views: 129

Revolutionary BMS & Battery Interoperability Standard

Observing great progress on many fronts this 'group mind' puts its consciousness @ I consider it time to create the proper discussion thread for an Idea I have been pushing: https://prezi.com/qibqej3sqqy1/open-source-battery/ :mrgreen: It is always sad to not see each cell of a battery treated to it...
by usertogo
Nov 27 2018 7:19am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 43
Views: 2083

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

There is a Chinese guy selling the programmer boards for about 12$ on Taobao https://2.taobao.com/item.htm?id=565948826876&ft=t&toSite=main If you are having difficulty ordering it then you can use a third party service like Taobao Focus. They will order it for you and ship it to you. https://buy.t...
by usertogo
Nov 27 2018 6:42am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 43
Views: 2083

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Nice! Good thing I've already placed my order @dutchrfshop for one of these PSUs :mrgreen: And I've also ordered some ESP32 dev boards + TJA1050 CAN transciever from AliExpress and will be making open source firmware to control the PSU through CAN. With the ESP32 that means you could control the PS...
by usertogo
Nov 26 2018 4:03pm
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 43
Views: 2083

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

I am going to test pulling them down to GND and report! Huawei-R4850G2completePinout.png The good news is I connected the 2 board detection pins together and pulled them down to the negative 48V (GND) and that was all that was required to get the unit to power up and deliver the proud 53.5V output!...
by usertogo
Nov 26 2018 8:44am
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 49
Views: 5044

Re: OpenEMoto

I've a new video but isn't something cool. I had a crash and broke my Marzocchi 380. Check this topic https://endless-sphere.com/forums/viewtopic.php?f=2&t=92618 The crash was big, but only impacts with the floor. Still my fork left bottle is bent in some way, and the stanchion can't slide. I feel ...
by usertogo
Nov 25 2018 4:44pm
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 43
Views: 2083

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

Thank you indeed you found the definition of the 2 unidentified pins https://translate.googleusercontent.com/translate_c?act=url&depth=1&hl=en&ie=UTF8&prev=_t&rurl=translate.google.com&sl=auto&sp=nmt4&tl=en&u=https://forum.huawei.com/enterprise/zh/thread-361081.html&xid=17259,15700023,15700124,15700...
by usertogo
Nov 25 2018 8:00am
Forum: Battery Technology
Topic: Converting an inverter welder into a charger (and welder)
Replies: 16
Views: 898

Re: Converting an inverter welder into a charger (and welder)

Thanks for that info. The huawei price/power looks very good. https://es.aliexpress.com/item/New-and-original-Huawei-R4850G2-rectifier-module-48V-56A-communiction-power/32818030744.html In the meantime, i've brought a dedicated 80usd DC welder. I've taken 1500W from it without halts. I will try to ...
by usertogo
Nov 23 2018 3:35pm
Forum: Battery Technology
Topic: Converting an inverter welder into a charger (and welder)
Replies: 16
Views: 898

Re: Converting an inverter welder into a charger (and welder)

I would recommend something like this: Eaton APR48-3G Rectifier Module ... You can mod it to go as low as 42V (10S) and as high as ~90V (20S) I think there is a bit of disinformation in it too, because its not the APR48 that can go up to 90V, but this switch mode input booster that a certain motor ...
by usertogo
Nov 20 2018 10:25am
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 43
Views: 2083

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

I have searched a lot and entered into the world of these communication power supply cabinets... I found that they usually contain LiFePo batteries, and the supplies can charge as well as supply the continuous operational current. With half a million hours MTBF ( https://www.cdiweb.com/datasheets/hu...
by usertogo
Nov 12 2018 6:09pm
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 43
Views: 2083

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

I have been advancing, meaning I found the box and wired power in, I get the green LED after boot, with a feeler voltage of about 1V on the output, but no more... DSC_0154web.JPG From a question posted on Piclist i got a hint that those are actually chargers from conception, so I applied logic as su...
by usertogo
Nov 11 2018 2:23pm
Forum: Battery Technology
Topic: transport friendly Adaptto charger -Eaton 1,8kW in Peli case
Replies: 16
Views: 2338

Re: transport friendly Adaptto charger -Eaton 1,8kW in Peli case

The charge mode of Adaptto controllers is a very nice feature because it makes it possible to use one charger (PSU + coil) for many vehicles with different battery configurations. I decided to use the Eaton APR-48-3G server PSU. Like the name says it has 48v nominal so it should be possible to char...
by usertogo
Nov 10 2018 5:53pm
Forum: Battery Technology
Topic: Converting an inverter welder into a charger (and welder)
Replies: 16
Views: 898

Re: Converting an inverter welder into a charger (and welder)

I would recommend something like this: Eaton APR48-3G Rectifier Module ... You can mod it to go as low as 42V (10S) and as high as ~90V (20S) All for about 100€ I like it, and already put one on order, found an original Eaton for little over €60 delivered; meanwhile I am also working on the Rectifi...
by usertogo
Oct 23 2018 3:12pm
Forum: Battery Technology
Topic: Rectifier Huawei R4850G2 48V 42~58V 3000w
Replies: 43
Views: 2083

Re: Rectifier Huawei R4850G2 48V 42~58V 3000w

DSC_4382web.JPG DSC_4375web.JPG DSC_4374web.JPG These pictures show a very well designed SMPS using high quality inductors and other components. One one side the Line input is carefully conditioned till it ends up in 2 fat 470uF 450V capacitors, from there it returns on the opposing side and with m...
by usertogo
Oct 22 2018 9:06am
Forum: Battery Technology
Topic: diy mobility solar versus the best available solutions
Replies: 0
Views: 149

diy mobility solar versus the best available solutions

Be patient with this thread, it will probably take a long time to get to any real solution, other than for example that Laurin Hahn from Sono Motors comments that his solar polycarbonate surfacing on the first attractive solar car invented in Germany - is more economical than a good paint job! So th...
by usertogo
Oct 08 2018 8:32am
Forum: E-Bike Build Threads / Photos & Video
Topic: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar
Replies: 331
Views: 22259

Re: Cooling Effect

A fun theoretical question is whether the energy needed to actively cool the panel would be more or less than the energy gained from increased output. I have found myself visualizing liquid cooling sitting under my solar canopy, especially in parts of the world where the heat not be considered an e...
by usertogo
Oct 08 2018 8:20am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 827
Views: 45815

Re: bluetooth BMS?

Appreciate your feedback. ... I am at the limit of my diagnostic capabilities. I don't know how to analyze the board components themselves and I am not personally interested in learning how to do that. I am going to order a different charger and different BMS to see what happens with different comp...
by usertogo
Oct 05 2018 4:40pm
Forum: E-Bike Technical
Topic: What size nut fits on a Crystalyte x5304 front hub axle?
Replies: 25
Views: 4397

Re: What size nut fits on a Crystalyte HS3525 hub axle?

Sorry to use the number of knowledgeable observers here to ask about a different Crystalyte... Is it possible that the HS3525 uses inch based threads? I measure at the outside of the threads 12.5mm diameter, and ergo the M12x1.25 nuts I have don't fit! I did measure that the pitch is approximately 1...
by usertogo
Aug 26 2018 1:59pm
Forum: E-Bike Build Threads / Photos & Video
Topic: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar
Replies: 331
Views: 22259

Re: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar

Was this really just an excuse to say "leftist" a lot? Your concern seems misplaced since they caught their flight out of Tehran many weeks ago. The story about the couple sounds like some fake news fabrication - they announce what they want to prove and even if they had been real the controlling s...
by usertogo
Aug 26 2018 10:38am
Forum: E-Vehicles General Discussion
Topic: Series Parallel Battery & Open voltage controller
Replies: 13
Views: 673

Re: Series Parallel Battery & Open voltage controller

I'm sceptical a series/parallel switched system will give you any advantage over a permanent series configuration. The higher voltage controller should be able to output sufficient current to give you all the hill-climbing torque you need at low speeds by virtue of working likes a buck converter. W...
by usertogo
Aug 26 2018 10:25am
Forum: E-Vehicles General Discussion
Topic: active suspension design approaches&developments DIY?
Replies: 1
Views: 313

active suspension design approaches&developments DIY?

My idea is to open a long term experimentation and R&D discussion that should then also be compiled to the WIKI cause I feel smoothest ride, jumping and even - like in the Roadster SpaceX option package - flying short distances are highly attractive and going to be normal some day... I wonder if ene...
by usertogo
Aug 15 2018 8:22am
Forum: Motor Technology
Topic: Partial winding short, large reluctance, quicker heatup -How to diagnose/prevent?
Replies: 1
Views: 151

Re: Partial winding short, large reluctance, quicker heatup -How to diagnose/prevent?

Meanwhile I watched quite a few videos where talking about used high mileage Tesla(Model S) the buyer noticed that often the car was on its 3rd or 4th motor - so even the big (r&d) guys have to live with the issue , have found out how to diagnose (relation of delta temperature in relation of the int...
by usertogo
Aug 15 2018 7:37am
Forum: E-Bike Build Threads / Photos & Video
Topic: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar
Replies: 331
Views: 22259

Re: My Sun Trip Bike, Back to Back Tandem Trike with Rowing Generator, Pedals, +Solar

Generated footage... I bet Justin&Anso has backed up some of the potential Video treasure... How long it appears for everybody else till TheSunTrip makes their 'big' documentary like they did 2013 and 2015 mainly for the french speaking and did it even have subtitles? Anyhow the world wants to learn...
by usertogo
Aug 15 2018 6:59am
Forum: Motor Technology
Topic: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW)
Replies: 3323
Views: 140041

Re: KT motor controllers -- Flexible OpenSource firmware for BMSBattery S/Kunteng KT motor controllers (0.25kW up to 5kW

I presume you intend to add more adjustable parameters eventually? No, I think I won't spend more time in the BT-App, I'm not very experienced with android studio. Will it ever be possible to use this system and still retain the LCD3? I really like the Bluetooth Idea if it could eventually cause no...
by usertogo
Aug 15 2018 6:48am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 827
Views: 45815

Re: bluetooth BMS?

Sorry for not having read every post in this thread, I wonder how is the communication to the developers (this is not open source, right?) is, can proposals for improvements be forwarded? I really like all the things that are being attempted, and think that the possibility to use GPS data to get to ...
by usertogo
Aug 13 2018 7:13am
Forum: E-Vehicles General Discussion
Topic: Series Parallel Battery & Open voltage controller
Replies: 13
Views: 673

Re: Series Parallel Battery & Open voltage controller

I am happy I found this already under discussion, I just searched for 'electric gearing series parallel' in the forum and found no hit, so I was just going to start a thread when I noticed you are right on subject for me! Drawing the circuit I notice the easiest parallel Series Switch of 2 equal ban...