Search found 89 matches

by trazor
Jan 17 2019 12:38pm
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 81
Views: 13111

Re: New build, BHT mid-drive "direct", custom frame

Great progress! I'm curious about which method you use to bend tubes. And the tube notching is perfect how you did it? there's a machine shop very close to my house about 1 block away. i just print an actual size template of the bends and he does them on the steel pipe using a manual pipe bender w/...
by trazor
Jan 16 2019 1:33am
Forum: Battery Technology
Topic: Hacking "JBLTools" Chinese Bluetooth BMS boards
Replies: 23
Views: 1002

Re: Hacking "JBLTools" Chinese Bluetooth BMS boards

I like the idea of a LCD screen for these BMS, probably adding a coulometer. But beware that if you source power from the communication port, the protection circuit will not trigger. I've killed my battery by leaving the FTDI module connected for couple months. I think it is a better idea to power ...
by trazor
Jan 15 2019 12:25am
Forum: E-Bike Non-hub Motor Drives
Topic: New build, BHT mid-drive "direct", custom frame
Replies: 81
Views: 13111

Re: New build, BHT mid-drive "direct", custom frame

Great progress! I'm curious about which method you use to bend tubes.
And the tube notching is perfect how you did it?
by trazor
Jan 15 2019 12:20am
Forum: Battery Technology
Topic: Hacking "JBLTools" Chinese Bluetooth BMS boards
Replies: 23
Views: 1002

Re: Hacking "JBLTools" Chinese Bluetooth BMS boards

Most likely such a high overvoltage would have damaged the serial transceiver. If that is a separate part from the MCU, you could try replacing it, but it may be just pins directly on the MCU, in which case that is probably damaged and likley to be unavailable to replace. It depends on whether that...
by trazor
Jan 08 2019 12:12pm
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 55
Views: 5812

Re: OpenEMoto

... At the end after all this research, i've a bike that has a plush rear suspension that everybody likes. I would liked to have more "progressivenes" (instead of the very linear curve) , but looks impossible with a standard shock and monopivot linkage. ... I was looking old posts and I had a thoug...
by trazor
Jan 08 2019 1:29am
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 55
Views: 5812

Re: OpenEMoto

Here are pictures of the fabrication of rubber tube caps. I'm using the Oogoo material described here https://www.instructables.com/id/How-To-Make-Your-Own-Sugru-Substitute/ IMG_20181231_051335.jpg IMG_20190103_024600.jpg IMG_20190103_024729.jpg IMG_20190103_025110.jpg IMG_20190108_025303.jpg
by trazor
Dec 29 2018 12:13pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 860
Views: 50802

Re: bluetooth BMS?

Izeman, you settings look more agressive than mine. Your delta voltage for balance is 3 mV and mine is 30. My start to balance voltage is lower but not much. I still think the Serial2USB box sucked all the battery energy, probably bypassing the protection mosfets. I don't have the skill to demonstra...
by trazor
Dec 29 2018 6:47am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 860
Views: 50802

Re: bluetooth BMS?

Aha, I understand. Maybe that is the reason, but I repeat I left the USB2Serial box connected, and now see it has a led on it always on.

Here are my current settings:
2018-12-29 08_43_46-JBDTools V1.1.png
Do you think those settings can create this "balance to death" situation?
by trazor
Dec 29 2018 1:24am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 860
Views: 50802

Re: bluetooth BMS?

I left the USB to Serial box connected for a month (I don't really remember the date) and now I'm seeing this: 2018-12-29 03_14_54-JBDTools V1.1.png Disassembled the pack and checked cell voltages. They read from 0.1 to 1 volt. So, this killed my battery. I'm angry and frustrated, these BMS were gre...
by trazor
Dec 28 2018 12:39am
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 55
Views: 5812

Re: OpenEMoto

Update on new battery design. I wanted to make it splash proof and probably able to clean it with a hose. Set on a thick rubbery paint designed to paint the floor facing side of cars. IMG_20181219_190128.jpg IMG_20181225_170642.jpg IMG-20181219-WA0012.jpg I'm happy with the outcome: - Probably not w...
by trazor
Dec 27 2018 11:43pm
Forum: E-Bike Technical
Topic: Bent rim walls ok to ride?
Replies: 2
Views: 97

Re: Bent rim walls ok to ride?

My rims are completely bent because rough riding. In fact I created a tool to bend them back, even if they are aluminum. BUT... I ride mostly offroad (check my signature). If doing highway speeds between cars is your choice... I think you should not bet your life to a maybe low probability mechanica...
by trazor
Dec 12 2018 1:08pm
Forum: E-Bike Technical
Topic: Mobipus Controllers
Replies: 170
Views: 14616

Re: Mobipus Controllers

Samd wrote:
Dec 12 2018 12:52pm
Admins can you please remove the troll


Sent from my iPhone using Tapatalk
That is rude man. ElectricGod wrote a very informational and neutral piece to potential buyers of these controllers. Move on.
by trazor
Dec 12 2018 10:32am
Forum: Battery Technology
Topic: Generic-Chinese-Bluetooth-BMS-communication-protocol
Replies: 24
Views: 1866

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

With 45-48S as my likely total cell voltage I end up feeling like it's easier to have the bms units drive relays to control power to a main contactor. I still need to work through whether the quiescent current draw will be too high as a result or if I turn on off the relay when the car us off if th...
by trazor
Dec 09 2018 9:24am
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 55
Views: 5812

Re: OpenEMoto

For completenes, I want to cross post this, on how I charge the two e-motos now: https://endless-sphere.com/forums/viewt ... &p=1428934

Image
by trazor
Dec 08 2018 9:31pm
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 55
Views: 5812

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 trazor
Dec 08 2018 9:18pm
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 55
Views: 5812

Re: OpenEMoto

About the shock... It isn't as easy as droping a a shock on the bike and expect to be soft or hard. On my previous bike I've done that mistake and ended with a super short rear wheel travel, impossible to compress after first inch. With OpenEmoto i've taken a more scientific approach. I warn you th...
by trazor
Dec 02 2018 11:53pm
Forum: Battery Technology
Topic: Converting an inverter welder into a charger (and welder)
Replies: 16
Views: 999

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 trazor
Dec 02 2018 11:53pm
Forum: Battery Technology
Topic: Charging batteries with my TIG welder
Replies: 3
Views: 359

Re: Charging batteries with my TIG welder

I brought the cheapest welder to charge my two e-motos in 1 hour (18s and 20s, about 800W/h per battery). I'm melting my garage wall sockets :( I need to lay a better power line to my garage now I'm taking about 2.5KW of power from the welder, the measurements at the socket (with a tp-link smart plu...
by trazor
Nov 23 2018 5:52pm
Forum: Battery Technology
Topic: Converting an inverter welder into a charger (and welder)
Replies: 16
Views: 999

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 switchmode input booster that a certain motor c...
by trazor
Nov 21 2018 1:39am
Forum: E-Bike Non-hub Motor Drives
Topic: #219 Chain Front Sprocket Suppliers?
Replies: 87
Views: 13615

Re: #219 Chain Front Sprocket Suppliers?

Most links on this thread are dead now. To this day I find the cheapest source for 219 chain parts to be https://azusaparts.com https://azusaparts.com/product-category/chain/standard-roller-chain/219-chain/ https://azusaparts.com/product-category/sprockets/b-type/for-219-chain/ Kometcartsales is goo...
by trazor
Nov 20 2018 11:57pm
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 55
Views: 5812

Re: OpenEMoto

The best part of having two motos is that you can bring a friend to ask you for tricks and film them :P
by trazor
Nov 14 2018 6:54pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 860
Views: 50802

Re: bluetooth BMS?

Non important observation: the xiaoxiang app that connects to these BMS stole the logo from a more prominent project: https://hadoop.apache.org/ :lol: China shameless programmers. :roll: You never know...maybe inside those atmel 328 processors these BMS use is a subspace link into AWS. Yeah, probab...
by trazor
Nov 14 2018 2:46pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 860
Views: 50802

Re: bluetooth BMS?

Non important observation: the xiaoxiang app that connects to these BMS stole the logo from a more prominent project: https://hadoop.apache.org/ :lol: China shameless programmers. :roll:
by trazor
Nov 14 2018 12:47am
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 55
Views: 5812

Re: OpenEMoto

Great. That of having 2 electric bikes in which only varies the motor gives to make a good comparative. Then share the differences between the two at the level of driving, that should be interesting :) The differences between mid drives and hubs is well understood. Basically: Hubs are an anchor in ...
by trazor
Nov 12 2018 1:33pm
Forum: E-Bike Non-hub Motor Drives
Topic: OpenEMoto
Replies: 55
Views: 5812

Re: OpenEMoto

After who knows how many hours of joyful riding the drive sprocket gave up: IMG_20181111_033618.jpg This process was slow, and the last time I checked the tooths were a hair of steel. Luckily, I've purchased couple 12 tooth when ordered the motor from lightningrod's store, so no downtime :) I've fou...