Search found 1685 matches
- Jan 23 2021 4:33pm
- Forum: Battery Technology
- Topic: 26s BMS for 600A max?
- Replies: 15
- Views: 1204
Re: 26s BMS for 600A max?
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...
- Jan 23 2021 2:57pm
- Forum: Battery Technology
- Topic: Any Car Batteries You like?
- Replies: 8
- Views: 163
Re: Any Car Batteries You like?
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...
- Jan 02 2021 12:07pm
- Forum: Battery Technology
- Topic: kWeld - "Next level" DIY battery spot welder
- Replies: 1225
- Views: 182531
Re: kWeld - "Next level" DIY battery spot welder
That is like <20% of a single battery for me.I think depends on your tips. I've been doing fine after like 1000 welds
- Jan 02 2021 6:21am
- Forum: Battery Technology
- Topic: kWeld - "Next level" DIY battery spot welder
- Replies: 1225
- Views: 182531
Re: kWeld - "Next level" DIY battery spot welder
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...
- Dec 29 2020 7:02am
- Forum: Battery Technology
- Topic: kWeld - "Next level" DIY battery spot welder
- Replies: 1225
- Views: 182531
Re: kWeld - "Next level" DIY battery spot welder
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.
longer leads are more practical for making bigger batteries.
- Nov 03 2020 9:14am
- Forum: Battery Technology
- Topic: kWeld - "Next level" DIY battery spot welder
- Replies: 1225
- Views: 182531
Re: kWeld - "Next level" DIY battery spot welder
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 ....
- Oct 31 2020 5:22pm
- Forum: Battery Technology
- Topic: AERDU 36v battery pack from Ali Express
- Replies: 8
- Views: 1135
Re: AERDU 36v battery pack from Ali Express
called it. 

- Oct 16 2020 4:34am
- Forum: Battery Technology
- Topic: bluetooth BMS?
- Replies: 1641
- Views: 211932
Re: bluetooth BMS?
broken connection. check the wire from the battery right up to the connector and check the connector itself.
- Oct 13 2020 12:48pm
- Forum: E-Scooter and Motorcycle General Discussion
- Topic: 2500w / 100Ah Lifepo4 / KLS4812S controller e-scooter configuration
- Replies: 10
- Views: 466
Re: 2500w / 100Ah Lifepo4 / KLS4812S controller e-scooter configuration
max discharge current is set to 100A. that needs to be increased to the maximum.
- Oct 12 2020 12:19pm
- Forum: E-Scooter and Motorcycle General Discussion
- Topic: 2500w / 100Ah Lifepo4 / KLS4812S controller e-scooter configuration
- Replies: 10
- Views: 466
Re: 2500w / 100Ah Lifepo4 / KLS4812S controller e-scooter configuration
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.
this is only an issue when you are fully charged. once you have driven a bit the problem will go away.
- Oct 04 2020 6:27pm
- Forum: E-Scooter and Motorcycle General Discussion
- Topic: 2500w / 100Ah Lifepo4 / KLS4812S controller e-scooter configuration
- Replies: 10
- Views: 466
Re: 2500w / 100Ah Lifepo4 / KLS4812S controller e-scooter configuration
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 ...
- Oct 04 2020 3:23pm
- Forum: E-Scooter and Motorcycle General Discussion
- Topic: 2500w / 100Ah Lifepo4 / KLS4812S controller e-scooter configuration
- Replies: 10
- Views: 466
Re: 2500w / 100Ah Lifepo4 / KLS4812S controller e-scooter configuration
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...
- Oct 01 2020 5:02am
- Forum: Battery Technology
- Topic: 0-120V 0-30A variable rectifier/amps/charger, is it ok?
- Replies: 14
- Views: 986
Re: 0-120V 0-30A variable rectifier/amps/charger, is it ok?
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...
- Sep 29 2020 6:18am
- Forum: Battery Technology
- Topic: How to recell Bosch Powerpack batteries?
- Replies: 15
- Views: 7599
Re: How to recell Bosch Powerpack batteries?
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...
- Sep 17 2020 5:43am
- Forum: Battery Technology
- Topic: mega copper battery spotwelder
- Replies: 28
- Views: 2688
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.
- Sep 16 2020 9:48am
- Forum: Battery Technology
- Topic: mega copper battery spotwelder
- Replies: 28
- Views: 2688
Re: mega copper battery spotwelder
that would happen no matter the power sourceridethelightning wrote: ↑Sep 16 2020 7:52amas i recall dr bass blew up his spotwelder, i think he reversed polarity or something. he was using supercaps i think
- Sep 15 2020 8:22am
- Forum: Battery Technology
- Topic: mega copper battery spotwelder
- Replies: 28
- Views: 2688
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.
- Aug 04 2020 3:00pm
- Forum: Battery Technology
- Topic: kWeld - "Next level" DIY battery spot welder
- Replies: 1225
- Views: 182531
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.
- Jul 21 2020 8:32am
- Forum: Motor Technology
- Topic: QS 3000w midmotor
- Replies: 609
- Views: 81384
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?
- Jul 11 2020 1:41pm
- Forum: Battery Technology
- Topic: kWeld - "Next level" DIY battery spot welder
- Replies: 1225
- Views: 182531
- Jul 11 2020 12:56pm
- Forum: E-Scooter and Motorcycle General Discussion
- Topic: Kelly Controller 12V
- Replies: 8
- Views: 631
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...
- Jun 29 2020 5:38am
- Forum: E-Scooter and Motorcycle General Discussion
- Topic: govecs go 3.4 high current warning light
- Replies: 13
- Views: 1181
- Jun 29 2020 4:18am
- Forum: E-Scooter and Motorcycle General Discussion
- Topic: govecs go 3.4 high current warning light
- Replies: 13
- Views: 1181
Re: govecs go 3.4 high current warning light
just do a complete callibration.
- Jun 27 2020 4:53pm
- Forum: E-Scooter and Motorcycle General Discussion
- Topic: Kelly Controller 12V
- Replies: 8
- Views: 631
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.
it says it very clearly in the manual.
- 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: 368
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 o...