Endless Sphere

why would you? for a 600A rating you can just buy a 750A megafuse and holder for a couple of [insert local currency] at a marine shop. its a LOT cheaper, safer and just works. ig you rely on the bms over overcurrent you have a problem further upstream. people tend to forget the bms is a failsafe, no...

just buy 2 12V winston/thundersky that fits. search for LP12V90AH, it will probably fit. if price is an issue just get the 60Ah version (LP12V60AH), its still big enough to crank a V10 schoolbus without issue at -20. and shop around, pricing is "bend over and cough" if you dont look around...

I think depends on your tips. I've been doing fine after like 1000 welds

That is like <20% of a single battery for me.

The 0.10mm thick copper may sound thin, but since copper is four times more conductive, with 1/4th the resistance (compared to nickel), the 0.10mm copper is equal in current-carrying ability to 0.40mm thick nickel. It's also cheaper and more readily available locally than nickel, plus easier to cut...

get rid of the connector, bolt the welder to the capacitor block and make the leads longer. then you can probably also weld at a lower votage or use the voltage to better regulate the available current.
longer leads are more practical for making bigger batteries.

Is there a way to connect 2 kWelds together to be able to handle more current? I don't need to double what one welder can do but I certainly feel the need for mine to handle probably 20 or 30% more juice to weld .20mm, pure nickel strips WITHOUT sticking electrodes. if the kweld is not enough for ....

called it.

broken connection. check the wire from the battery right up to the connector and check the connector itself.

max discharge current is set to 100A. that needs to be increased to the maximum.

no, you need to either stop charging at 4V or raise the upper voltage limit that the bms engages at. so 4.3V or higher so the battery can absorb the power you put back in during regen.

this is only an issue when you are fully charged. once you have driven a bit the problem will go away.

turn the regen off until the bms settings are changed. the speed hunting comes from the kelly not wanting to do the brick wall style that sevcon does and it just tapers off the acceleration. that jo-jo's a bit until the speed is stable. its mainly due to putting high voltage and currents in a motor ...

first focus on the bms. what limits do you have on that? a shutdown is basically always a bms that shuts the party down due to overvoltage during regen or overcurrent during acceleration. change settings on your bms to prevent a shutdown. does the speed hunting happen during driving or with the whee...

the reason you dont find them any is because they blow up. too small a package with shitty chinesium parts that need to work oustide optimal range means you blow the arse out of them in a few months. if you need a changer for a certain battery you need to get a charger that is optimized for that vol...

its not a rumor, its very real. the bms has all its programming in RAM, not ROM/flash memory. removing the board from the batteries will cut the power to the ram and then all the programming is gone instantly. large recellers simply have a specilized 10 output power supply to keep the bms active dur...

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.

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

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.

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.

i see some version with chain drive and others with belt. does QS supply a belt option and what belt model does it have?

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.

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...

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.

just do a complete callibration.

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

it says it very clearly in the manual.

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 o...