Search found 1671 matches

by flippy
Sep 17 2020 5:43am
Forum: Battery Technology
Topic: mega copper battery spotwelder
Replies: 28
Views: 2315

Re: mega copper battery spotwelder

supercaps are actually a lot safer, if not in use it does not store power and you only need a small power supply to charge them, very little energy is actually "in use" at any given time.
by flippy
Sep 16 2020 9:48am
Forum: Battery Technology
Topic: mega copper battery spotwelder
Replies: 28
Views: 2315

Re: mega copper battery spotwelder

ridethelightning wrote:
Sep 16 2020 7:52am
as i recall dr bass blew up his spotwelder, i think he reversed polarity or something. he was using supercaps i think
that would happen no matter the power source
by flippy
Sep 15 2020 8:22am
Forum: Battery Technology
Topic: mega copper battery spotwelder
Replies: 28
Views: 2315

Re: mega copper battery spotwelder

i would think a dozen supercaps would be a more effective solution then using batteries. also simpler, safer and more robust then lipo. and more consistent to get insane amps.
by flippy
Aug 04 2020 3:00pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1193
Views: 170039

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

use a few taps of 80+ grit on the tips every 100 welds or so. just clean the cells with IPA before putting the nickel on.
by flippy
Jul 21 2020 8:32am
Forum: Motor Technology
Topic: QS 3000w midmotor
Replies: 562
Views: 73232

Re: QS 3000w midmotor

i see some version with chain drive and others with belt. does QS supply a belt option and what belt model does it have?
by flippy
Jul 11 2020 1:41pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1193
Views: 170039

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

agniusm wrote:
Jul 05 2020 5:03am
Ordered this unit for the odd jobs i have. Was wondering how many weld you get out of 5ah lipo?
just keep a dumb charger on it and keep it floating at 4V per cell.
by flippy
Jul 11 2020 12:56pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Kelly Controller 12V
Replies: 8
Views: 557

Re: Kelly Controller 12V

you can put a standard hall sensor on your existing brake lever and glue a magnet on the lever and set the controller to match so you regen before the pads touch the disk, that way you always use max regen when possible and only if you need more you can use the pads all on the same lever. lots of tr...
by flippy
Jun 29 2020 5:38am
Forum: E-Scooter and Motorcycle General Discussion
Topic: govecs go 3.4 high current warning light
Replies: 13
Views: 1029

Re: govecs go 3.4 high current warning light

Terber wrote:
Jun 29 2020 4:33am
Ok. Then I'll need the can to USB interface and connect to the controller and so on?..

Expensive cable.

Terje
yes, or ask help from a dealership or a forum member in your country that is willing to help that has the cable.
by flippy
Jun 27 2020 4:53pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: Kelly Controller 12V
Replies: 8
Views: 557

Re: Kelly Controller 12V

no, you can not. the 12v can only deliver about 100ma. its only for signal.

it says it very clearly in the manual.
by flippy
Jun 17 2020 7:35am
Forum: E-Scooter and Motorcycle General Discussion
Topic: Kelly or Sabvotom? which pure sine wave high amp controller to use?
Replies: 3
Views: 313

Re: Kelly or Sabvotom? which pure sine wave high amp controller to use?

just get the kelly. the advantages outweigh the "stigma" kelly has. they sell a LOT of controllers and its a proper "brand", so if there are issues they will get lots of attention. see tesla for example. 1 car breaks down and its national news depsite they having a million cars on the road. warranty...
by flippy
Jun 14 2020 3:15am
Forum: Battery Technology
Topic: 18650pack cell protection idea. PTC + fuse & diode).
Replies: 25
Views: 1568

Re: 18650pack cell protection idea. PTC + fuse & diode).

I was in the middle of writing and rewriting the post, and accidentally hit submit instead of preview, so what you quote there isn't the version intended, and is not complete. :oops: If you can, please read the version I just finished (the same post ID), and respond to that one instead. EDIT: Never...
by flippy
Jun 14 2020 3:00am
Forum: Battery Technology
Topic: 18650pack cell protection idea. PTC + fuse & diode).
Replies: 25
Views: 1568

Re: 18650pack cell protection idea. PTC + fuse & diode).

lets start at the beginning: a the reason a balance wire disconnects or breaks is 90% at the solder joints as they are by far the most fagile connection. While every point you make may be applicable to the stuff you yourself are talking about now, none of it answers any of the questions asked. I"m ...
by flippy
Jun 14 2020 2:35am
Forum: Battery Technology
Topic: 18650pack cell protection idea. PTC + fuse & diode).
Replies: 25
Views: 1568

Re: 18650pack cell protection idea. PTC + fuse & diode).

a balance wire that breaks off is not helped by a fuse. as its considerably more likly it will fail before the fuse then after it making the whole enterprise useless. I didn't say anything about a balance wire breaking off being helped by a fuse. I said that balance wires breaking doesn't blow up a...
by flippy
Jun 13 2020 9:38am
Forum: Battery Technology
Topic: 18650pack cell protection idea. PTC + fuse & diode).
Replies: 25
Views: 1568

Re: 18650pack cell protection idea. PTC + fuse & diode).

a balance wire that breaks off is not helped by a fuse. as its considerably more likly it will fail before the fuse then after it making the whole enterprise useless. just use wire with the proper diameter, real thin stranded copper (sillicone wire!) and make sure the connections cant move or shake....
by flippy
Jun 13 2020 7:06am
Forum: Battery Technology
Topic: 18650pack cell protection idea. PTC + fuse & diode).
Replies: 25
Views: 1568

Re: 18650pack cell protection idea. PTC + fuse & diode).

If you want to go that route then you need a regular fuse, never ever put passive or active parts between the bms and the cells. Sorry I don't get it. A regular fuse (i.e. non PTC) is a passive element so he cannot go that route either then. Do you mean he should only use a regular fuse after the B...
by flippy
Jun 11 2020 7:08am
Forum: E-Scooter and Motorcycle General Discussion
Topic: govecs go 3.4 high current warning light
Replies: 13
Views: 1029

Re: govecs go 3.4 high current warning light

samv76 wrote:
Jun 11 2020 3:07am
hahaha. are the Kelly controllers easier to understand and to program?
yes, all the difficult stuff has been done for you, just set basic parameters and you are done.
by flippy
Jun 10 2020 5:59pm
Forum: E-Scooter and Motorcycle General Discussion
Topic: govecs go 3.4 high current warning light
Replies: 13
Views: 1029

Re: govecs go 3.4 high current warning light

samv76 wrote:
Jun 10 2020 1:03pm
Its fun stuff but pretty challenging.

programming a sevcon is about as fun as juggeling razor blades.
by flippy
Jun 10 2020 11:52am
Forum: E-Scooter and Motorcycle General Discussion
Topic: govecs go 3.4 high current warning light
Replies: 13
Views: 1029

Re: govecs go 3.4 high current warning light

encoder alighment is done with the software.
by flippy
May 29 2020 4:51am
Forum: Battery Technology
Topic: Fast Charging - What is the secret?
Replies: 36
Views: 2260

Re: Fast Charging - What is the secret?

Tool batteries charge at successfully at very high rates. Makita 18V chargers charge at 9 amp maximum. Their secret is good engineering and design. no, they use low capacity high current cells with short cycle life. not high capacity cells with high cycle life like you see in automotive or laptop u...
by flippy
May 08 2020 5:43am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1193
Views: 170039

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

Got my kWeld yesterday and got it all together, just waiting on the power source now. For the power source, I ordered two Turnigy Nano-tech 5000mAh batteries, with the intent to run them in parallel to reduce the 'abuse' on each battery, but I've read what seem to be conflicting information. I've r...
by flippy
May 03 2020 9:54pm
Forum: General Discussion
Topic: gas price thread
Replies: 784
Views: 75172

Re: gas price thread

still 7 bucks in europe...
by flippy
Apr 23 2020 5:10am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 1193
Views: 170039

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

i used it with a set of 4 60Ah thundersky/winston cells that i used for years in my previous car and it faulted out as the amps was WELL above 2000.

so, dont use those.
by flippy
Apr 03 2020 3:14pm
Forum: Motor Technology
Topic: Kelly controller KLS7230S overtemp error - factory reset
Replies: 6
Views: 243

Re: Bricked Kelly KLS controller

just go to the support page, fany will probably answer.
by flippy
Apr 03 2020 2:54pm
Forum: Motor Technology
Topic: Kelly controller KLS7230S overtemp error - factory reset
Replies: 6
Views: 243

Re: Bricked Kelly KLS controller

email fany, explain the current state of the unit and ask if a firmware fix would help. if possible they will send you the correct file.