Search found 299 matches

by BVH
Aug 25 2019 12:15pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 806
Views: 96082

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

I've not had the need for .3 strips. Most I've needed is .2.
by BVH
Aug 25 2019 10:49am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 806
Views: 96082

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

Same idea but different battery. I use two, 3S/6000 Panthers and it welds fine. However, I was not able to initially calibrate the Kweld with both batteries run in Parallel due to too much current available. I'd get an error when trying to calibrate. So at the mfg's recommendation, I calibrated usin...
by BVH
Aug 15 2019 6:44pm
Forum: E-Bike Technical
Topic: Regenerative braking + fully charged battery
Replies: 12
Views: 369

Re: Regenerative braking + fully charged battery

The Phaserunner controller has programmable regen parameters. You can set current and voltage limits and it will taper and terminate regen after reaching your numbers. Maybe other controllers have this, too?
by BVH
Aug 10 2019 5:32pm
Forum: Items Wanted
Topic: Prodecotech 51.2V/12 Ah LiFeP04 batteries - Looking to buy a failed one for experimentation
Replies: 2
Views: 199

Prodecotech 51.2V/12 Ah LiFeP04 batteries - Looking to buy a failed one for experimentation

As the title says, If someone has a failed 51.2V, 16S/12 Ah LiFeP04 Prodecotech pack they would sell, I'd be interested in it.
by BVH
Aug 10 2019 5:30pm
Forum: E-Bike General Discussion
Topic: Prodeco Outlaw SS - Battery finally died
Replies: 10
Views: 821

Re: Prodeco Outlaw SS - Battery finally died

On the chance that Hexland might see this, I'd be interested in buying your shot battery to experiment with. I'd like to see if I can match the LiFeP04 pouch cells and possibly rebuild my packs.
by BVH
Jul 27 2019 3:59pm
Forum: E-Bike General Discussion
Topic: Prodeco Outlaw SS - Battery finally died
Replies: 10
Views: 821

Re: Prodeco Outlaw SS - Battery finally died

I got my Prodeco Oasis in 2014 and added a second Prodeco battery in the triangle using the stock rack/battery mount and 2nd LiFeP04 51.2/12 Ah pack. I always run them in Parallel. I'm still getting just under 8 Amp Hours out of each pack which is about 80% of new capacity. I, too emailed Luis in Fe...
by BVH
Jul 16 2019 3:54pm
Forum: Battery Technology
Topic: Parallel Battery packs
Replies: 11
Views: 540

Re: Parallel Battery packs

I have 2 each, 51.2V nominal, 12 Amp Hour LiFeP04 packs I run parallel but are separated by a key switch on each. I use .2 to .3 Volts as my maximum differential to connect the packs together. One day I'll measure the equalization current but the wires are very difficult to get to. If they are furth...
by BVH
Jun 27 2019 5:41pm
Forum: Battery Technology
Topic: Adding a Key to battery pack ?
Replies: 7
Views: 333

Re: Adding a Key to battery pack ?

I use the grin Tech key switch with my 57 Volt (initial) packs.

https://www.ebikes.ca/keyswitch.html
by BVH
May 26 2019 4:23pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 806
Views: 96082

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

My Sunkko is long gone. Was gone soon after the Kweld arrived.
by BVH
May 03 2019 7:22pm
Forum: Battery Technology
Topic: How to put 2 different battery pack in parallel
Replies: 9
Views: 403

Re: How to put 2 different battery pack in parallel

As others have said, be sure that the newly charged packs are at or near the same final resting Voltage before electrically connecting them. My packs are 51.2 nominal and I allow up to .4 Volts differential when connecting. My packs are usually something like 55.2 and 55.5 Volts when I connect them....
by BVH
Apr 13 2019 4:37pm
Forum: Battery Technology
Topic: Li-ion battery charger suggestion
Replies: 30
Views: 1041

Re: Li-ion battery charger suggestion

As someone who, over a two-year period bought a little over 50 each, "Not Working/For Parts" Sorensens of all input and output Voltages and currents and re-sold 33 of them, you can get lucky on Ebay. Look for a "not working" 60V/18A, 1KW PS that does not have the rear panel DB25 plug in-place. Chanc...
by BVH
Apr 07 2019 12:07pm
Forum: Battery Technology
Topic: The Cycle Satiator, universal charger for the enthusiasts
Replies: 725
Views: 117660

Re: The Cycle Satiator, universal charger for the enthusiasts

No thoughts from the experts here on my above post?
by BVH
Mar 31 2019 12:17am
Forum: Battery Technology
Topic: 709A spot welder
Replies: 3
Views: 243

Re: 709A spot welder

I had the 709A and had the same issue despite the rotary power knob turned to max and all 3 Pulse count switches engaged. Just not enough power to do the job with even .025 strips. Sold it and got the Kweld talked about here on ES. Problem solved.
by BVH
Mar 30 2019 12:27pm
Forum: Battery Technology
Topic: The Cycle Satiator, universal charger for the enthusiasts
Replies: 725
Views: 117660

Re: The Cycle Satiator, universal charger for the enthusiasts

For a few years, I have charged my two LiFeP04 16S/12 Ah packs to 3.5 Volts per cell. These packs have internal BMS's with balancing. Thinking after all this time that maybe the BMS's wont initiate the balance mode unless they see a 3.6 Volts per cell termination, I charged each pack separately and ...
by BVH
Mar 17 2019 8:49am
Forum: Battery Technology
Topic: How measure capacity of LI-ION pack?
Replies: 8
Views: 359

Re: How measure capacity of LI-ION pack?

I'm fortunate to have both a TDI Systems 1500 Watt electronic DC load and a 4000 Watt DC Eload. I find that I typically ride at between 250 and 500 Watts most of the ride so I'll put one of these power measuring devices in-Series with the load, dial in about 350 Watts (in Constant Current Mode) and ...
by BVH
Mar 16 2019 11:40pm
Forum: Battery Technology
Topic: How measure capacity of LI-ION pack?
Replies: 8
Views: 359

Re: How measure capacity of LI-ION pack?

With all these power meters, at what rate should a LiFeP04 pack be discharged to obtain true capacity? I know with Lead Acid, Peukert factor is in play and hense I think the standardized .1C discharge rate? Can a .25C or .5C rate be used and will it still be accurate?
by BVH
Mar 02 2019 6:05pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 806
Views: 96082

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

This could be the same issue I posted about just a page or so back. Your Panther can provide over 2000 Amps during calibration so the unit senses overcurrent and fails to complete the calibration process. Without the calibration process being completed and a value stored, the welder will not go into...
by BVH
Feb 04 2019 10:11am
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 806
Views: 96082

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

The Hobbyking Grapheen Panther I linked to before is a 6AH so you could possibly get another 20% more welds than with the 700-800 estimate graphed above. They make larger capacity, up to 10 AH but those might provide too much current and cause the Calibration Over-current issue I was having. Of cour...
by BVH
Feb 03 2019 1:43pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 806
Views: 96082

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

Did anybody tested the kWeld against a Sunkko 709A? I'm looking forward to buying a spotwelder and like the possibility of the Sunkko devices to just run them off a socket. No need for a LiPo battery and just plug&play, comes with a soldering iron too. The prices are about the same for the Sunkko a...
by BVH
Feb 01 2019 11:31pm
Forum: Battery Technology
Topic: iCharger 4010 Duo review
Replies: 45
Views: 3674

Re: iCharger 4010 Duo review

I use my 4010 to charge my two, 9S/100 Ah LiFeP04 prismatic packs. It charges them without issue. It'll charge right up to the channel limit Watts if you feed it enough input power at over 34 Volts. Roughly, It would be able to charge both your packs at about a 20 Amp rate at one time with your limi...
by BVH
Feb 01 2019 1:50pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 806
Views: 96082

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

Just to close this out from my earlier post....Frank advised me I had too much current available with the two paralleled 3S/6000 Grapheen packs to accomplish the calibration. I was flowing 1996 Amps which triggered overcurrent. bought a Hobbyking Grapheen 3S/6000 Panther which is the 75C rated pack ...
by BVH
Jan 21 2019 6:42pm
Forum: Battery Technology
Topic: Clarification on the 20% Rule
Replies: 14
Views: 681

Re: Clarification on the 20% Rule

Taking any chemistry pack to below 20% - resting, is doing some damage. What is the % indication after an hours rest at home?
by BVH
Jan 19 2019 1:43pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 806
Views: 96082

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

OK the flash to 2.8 was successful. I then got part way into the CAL procedure and got a phone call. Was on it for about 3 minutes and when I returned, the screen still read SHORT! so I resumed by holding the probes together and pressing the foot pedal. I got a significant flow of current, looking l...