Search found 4972 matches

by izeman
Feb 20 2020 8:35am
Forum: Battery Technology
Topic: BOSS LEVEL CUSTOM SPOT WELDER
Replies: 448
Views: 51234

Re: BOSS LEVEL CUSTOM SPOT WELDER

Looks good. Nice find. Thanks. I always take your videos as reference to see if a weld it ok, good, or perfect. I use blades for testing as well, but have a strange phenonem. It seems that turning UP the time makes welds not better, or at least I don't see those massive burnings as in your video. I...
by izeman
Feb 20 2020 5:34am
Forum: Battery Technology
Topic: BOSS LEVEL CUSTOM SPOT WELDER
Replies: 448
Views: 51234

Re: BOSS LEVEL CUSTOM SPOT WELDER

This is the electrode holder I bought (together with 2x 50cm of #6 silicone wire)
https://www.aliexpress.com/item/4000544 ... 4c4d354x2d


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by izeman
Feb 19 2020 3:01pm
Forum: Battery Technology
Topic: BOSS LEVEL CUSTOM SPOT WELDER
Replies: 448
Views: 51234

Re: BOSS LEVEL CUSTOM SPOT WELDER

Thanks to forum user Maddin88 who owns a kweld which is able to show current draw from the battery, I was able to check my 4s A123 AMP20 pack's capability. This pack was built from 6y+ old b-grade cells which set on the shelf for that time. I put them to new use, combining them with metal clamps. So...
by izeman
Feb 09 2020 10:13am
Forum: E-Bike Build Threads / Photos & Video
Topic: Klein Mantra rebuild / TSDZ2
Replies: 13
Views: 780

Re: Klein Mantra rebuild / TSDZ2

Super Nice! What’s your plan to get the higher gear ratios necessary for 20” wheels? That's a good point I'm not sure about. I ordered the biggest front sprocket it could find which is a 52T. This is 24% more than the regular 42T. The circumfence of the 20" with the moped tire is 172cm compared to ...
by izeman
Feb 09 2020 6:48am
Forum: E-Bike Build Threads / Photos & Video
Topic: Klein Mantra rebuild / TSDZ2
Replies: 13
Views: 780

Re: Klein Mantra rebuild / TSDZ2

Yesterday I started building the wheels. They looks quite beefy as they are only 20" rims with moped tires. I really like the look of them

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by izeman
Feb 09 2020 6:46am
Forum: E-Bike Build Threads / Photos & Video
Topic: Klein Mantra rebuild / TSDZ2
Replies: 13
Views: 780

Re: Klein Mantra rebuild / TSDZ2

The frame was sanded and painted in the same mate black as the original frame.

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by izeman
Feb 09 2020 6:44am
Forum: E-Bike Build Threads / Photos & Video
Topic: Klein Mantra rebuild / TSDZ2
Replies: 13
Views: 780

Re: Klein Mantra rebuild / TSDZ2

Some updates:

I installed a temperature sensor

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by izeman
Feb 04 2020 6:05am
Forum: Battery Technology
Topic: Building 48V 500 Wh 18650 Battery Pack
Replies: 5
Views: 279

Re: Building 48V 500 Wh 18650 Battery Pack

Yeah. Use case does matter. And power need? How many Watts/Ampere do you need. And every connector adds resistance to the circuit which leads to a voltage drop. So the less connectors and the shorter and thicker the wires are the better the end result will be. Maybe post a picture of how you plan to...
by izeman
Feb 04 2020 6:00am
Forum: Battery Technology
Topic: Making slotted nickel strips?
Replies: 7
Views: 321

Re: Making slotted nickel strips?

dremel also has fiber-reinforced discs, though they are about twice as thick as the brittle ones. but they don't break easily. I got both of them. And diamond wheels as well. I will try all three kind of cutting wheels as well as the punch with 1mm diameter. It should be possible to punch holes qui...
by izeman
Feb 04 2020 5:56am
Forum: Battery Technology
Topic: Making slotted nickel strips?
Replies: 7
Views: 321

Re: Making slotted nickel strips?

Image

Those are 25mm wide strips that will cover 6 cells at a time. So cutting with sheers may not be possible most of the time.
by izeman
Feb 03 2020 12:39pm
Forum: Battery Technology
Topic: Building 48V 500 Wh 18650 Battery Pack
Replies: 5
Views: 279

Re: Building 48V 500 Wh 18650 Battery Pack

If you use LiIon cell voltage is 3.6V nominal. So you need between 13 or 14 cells in series.
by izeman
Feb 03 2020 12:37pm
Forum: Battery Technology
Topic: Building 48V 500 Wh 18650 Battery Pack
Replies: 5
Views: 279

Re: Building 48V 500 Wh 18650 Battery Pack

LiFePo4 is 3.2V nominal. Not 3.6V
48V nominal needs 15 cell in series. And around 10Ah. If you take 2.600mAh cells that's 4 in parallel.
You will build a 15s4p pack = 60 cells and total capacity will be 499.2Wh.
by izeman
Feb 03 2020 7:40am
Forum: Battery Technology
Topic: Making slotted nickel strips?
Replies: 7
Views: 321

Making slotted nickel strips?

That is the super thin disc that breaks very easily. Correct?
Did you like the results?
by izeman
Feb 03 2020 4:54am
Forum: Battery Technology
Topic: Making slotted nickel strips?
Replies: 7
Views: 321

Making slotted nickel strips?

To improve spot welds i's like to slot my nickel strips. Batteries are placed in hexagonal layout and nickel strips are 25mm wide and 0.2mm thick.
I'd even slot them or maybe punch little holes (1mm) and weld on opposite sides.
by izeman
Jan 29 2020 3:36pm
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1271
Views: 146614

Re: bluetooth BMS?

Anyone has an idea if/where there are firmware updates for the BMS? I was wondering if there are some improvements.
by izeman
Jan 22 2020 3:40pm
Forum: E-Bike Technical
Topic: Rim nipple holes 4.7mm - what to do??
Replies: 5
Views: 416

Re: Rim nipple holes 4.7mm - what to do??

fwiw, using your exact phrase "nipple holes of the rims are 4.7mm" google finds that weinmann site as the first hit. ;) You are totally right, but other than the first link there was nothing else useful. NO rim manufacturer writes anything about which nipples to use, or what the hole diameter of th...
by izeman
Jan 22 2020 1:58pm
Forum: E-Bike Technical
Topic: Rim nipple holes 4.7mm - what to do??
Replies: 5
Views: 416

Re: Rim nipple holes 4.7mm - what to do??

Thanks amberwolf. I searched a lot, but couldn't find ANY info. So it seems 4.7mm is standard. Unfortunately I can't measure any other rims. I already have the rims. I won't order any new ones. I already had 4mm nipples installed, and it worked, but I wanted to make sure all is correct, as those hav...
by izeman
Jan 22 2020 1:11pm
Forum: E-Bike Technical
Topic: Rim nipple holes 4.7mm - what to do??
Replies: 5
Views: 416

Rim nipple holes 4.7mm - what to do??

I got Alienation Delinquent rims. Those are 20" BMX rims. I want to re-lace the wheels and use new hubs, so i have to order new spokes (and nipples). All nipples offered which i found are either 4mm or 5mm. But the nipple holes of the rims are 4.7mm. This is somehow strange, as the 4mm nipples have ...
by izeman
Jan 21 2020 5:42am
Forum: E-Bike Build Threads / Photos & Video
Topic: Klein Mantra rebuild / TSDZ2
Replies: 13
Views: 780

Re: Klein Mantra rebuild / TSDZ2

There seems to be massive interest in this build based on the comments and replies ;), so I want to give a short update. Building the battery started now. After having printed the battery spacer, and ordered 42 LG HG2 batteries it was time to think about the nickel tabs to combine it into one big ba...
by izeman
Jan 19 2020 7:18am
Forum: E-Bike Technical
Topic: Bafang 850C color LCD, currently working for TSDZ2 motor -- Flexible OpenSource firmware
Replies: 188
Views: 20279

Re: Bafang 850C color LCD -- Flexible OpenSource firmware

Upgrade should work that way: Display is power off. Then all connected, you press "Update firmware", it shows "waiting", and then you press the POWER button shortly and release again. Then it will start updating instantly. No more waiting. If update doesn't start, then something is wrong. To be able...
by izeman
Jan 16 2020 11:43am
Forum: E-Bike Non-hub Motor Drives
Topic: New "TSDZ2 Torque Sensor Central Motor"
Replies: 6609
Views: 662803

Re: New "TSDZ2 Torque Sensor Central Motor"

That's how i did it, but i requires welding to the frame ;)

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by izeman
Jan 15 2020 5:50am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1271
Views: 146614

Re: bluetooth BMS?

Hello. I wanted to calibrate my smartbms (antbms), it shows me 57.7v while in reality I have 57.9v. I cannot change "Total Voltage Reference Value" which is set to 3000N is there a tip? similarly I don't understand too much to limit the charge to 4.1V, I can't lower the voltage of my charger. I tri...
by izeman
Jan 14 2020 6:13pm
Forum: Motor Technology
Topic: TSDZ2 mid drive and 850C and SW102 displays only -- Flexible OpenSource firmware (Casainho code only)
Replies: 4559
Views: 313577

Re: TSDZ2 mid drive -- Flexible OpenSource firmware (Casainho code only) for TongSheng TSDZ2 mid drive motor

Thanks, I have just tried following that again. Perhaps I am blind, all the links only seem to lead to more wiki pages. :confused: I agree. I was confusing, and it sometimes still is. The way the wiki is organized, and the structuring of documentation. Or at least, it's different from what I'm used...
by izeman
Jan 14 2020 10:03am
Forum: E-Bike Build Threads / Photos & Video
Topic: Klein Mantra rebuild / TSDZ2
Replies: 13
Views: 780

Re: Klein Mantra rebuild / TSDZ2

Don't go centrelock. They are a lot more expensive and no cheap alternatives. I would easily choose a different hub if I had to, proprietary standards suck. I already ordered centerlock hubs and discs. There weren't many choices for 6 hole hubs & discs. Having not ordered brake stuff for quite some...
by izeman
Jan 14 2020 4:08am
Forum: Motor Technology
Topic: TSDZ2 mid drive and 850C and SW102 displays only -- Flexible OpenSource firmware (Casainho code only)
Replies: 4559
Views: 313577

Re: TSDZ2 mid drive -- Flexible OpenSource firmware for TongSheng TSDZ2 mid drive motor

redwater wrote:
Jan 14 2020 4:05am
Ups. my photos was blocked on fotosik.pl cause of transfer limit ... I'll move it to another server .
You can directly upload them to the forum. Just take care that they are small enough. 800px wide i guess.