Search found 53 matches

by Kajman
Jul 07 2019 4:09pm
Forum: Battery Technology
Topic: BMW i3 Batteries
Replies: 17
Views: 3145

Re: BMW i3 Batteries

BMS as any other, just choose good amps and that's it.
by Kajman
Jun 24 2019 5:14am
Forum: Items for Sale - Used
Topic: Compact 10s5p 37v/42v battery packs 17.5Ah / 640Wh or 16.75Ah / 619Wh, Sanyo GA and BL cells, EU
Replies: 6
Views: 779

Compact 10s5p 37v/42v battery packs 17.5Ah / 640Wh or 16.75Ah / 619Wh, Sanyo GA and BL cells, EU

Hi Due to accident I have to abort all my projects this year, so for sale some of my packs, first above mentioned, they are new, after 1 test cycle, BMS is dead, so another is required if someone wants. Packs are very compact and easy to connect in series or parallel for 20s5p or 10s10p f.e. Made wi...
by Kajman
May 09 2019 3:03am
Forum: E-Bike Technical
Topic: Looking for shared ebike frames projects for CNC/Laser, anyone knows where to find any?
Replies: 2
Views: 187

Looking for shared ebike frames projects for CNC/Laser, anyone knows where to find any?

Hi, As my friend has quite a large workshop with cnc and laser machines, we are both quite tall and it is hard to get comfortable frame for us, so we decieded to start some custom ebike project for us, based on shared by someone parasolid, step, iges or other files with detailes. We know quite a lot...
by Kajman
Apr 28 2019 5:22pm
Forum: Battery Technology
Topic: kWeld - "Next level" DIY battery spot welder
Replies: 884
Views: 101422

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

I have your welder still in a box. But battery is a question. You say it shouldn't be too high voltage, I have many batteries, so what voltage is best? Current is not a problem,have very strong lipos, lifepo and liion, so what is yourideal voltage and supply current?
by Kajman
Apr 28 2019 5:07pm
Forum: Battery Technology
Topic: Boston-Power Swing 5300 Li-ion cell test
Replies: 119
Views: 12972

Re: Boston-Power Swing 5300 Li-ion cell test

I used those cells on one bike for 3 years. They are 7A cells continous, later they got really hot. 7A is all they can do without getting over 45*c
by Kajman
Apr 28 2019 4:48pm
Forum: Battery Technology
Topic: What battery to choose after your last one burned your house.
Replies: 94
Views: 5232

Re: What battery to choose after your last one burned your house.

How did a123 26650 burn? It was chemistry burn or just thing causing short circuit burned? Or heatshrink on cell because of heat? Very often cell does not have to have flamable chemistry, enough is what is doing short circuit or something close enough to catch temp.
by Kajman
Apr 07 2019 12:55pm
Forum: Items for Sale - Used
Topic: Victron 25.6v 200Ah/5120Wh 8s1p LiFepo batteries, 400A/200A cont., EU
Replies: 4
Views: 475

Re: Victron 25.6v 200Ah/5120Wh 8s1p LiFepo batteries, 400A/200A cont., EU

It should be new, but several cycles for bms tests were performed, so I prefer to call it slightly used.
by Kajman
Apr 03 2019 2:20am
Forum: Items for Sale - Used
Topic: Victron 25.6v 200Ah/5120Wh 8s1p LiFepo batteries, 400A/200A cont., EU
Replies: 4
Views: 475

Victron 25.6v 200Ah/5120Wh 8s1p LiFepo batteries, 400A/200A cont., EU

Ok, spring is coming, more space needed, garage sale: If somebody wants, I have some Victron 25.6v 200Ah/5120Wh 8s1p LiFepo batteries for sale. Defective BMS. Exactly this: https://fullsol.de/victron-energy-smart-lifepo4-akku-25-6-200ah.html Specs: https://www.victronenergy.pl/upload/documents/Datas...
by Kajman
Mar 27 2019 9:54am
Forum: Items for Sale - Used
Topic: Sanyo NCR18650GA, Samsung 29E cells, EU
Replies: 0
Views: 345

Sanyo NCR18650GA, Samsung 29E cells, EU

Hi, I have left from my winter projects some Sanyo GA cells, exactly 202pcs :) they were new, dismounted from larger pack (weld signs at ends), they all should be 2018, but maybe I missed some 2017 cell somewhere, so let's assume they are 2017-2018. I don't have time to check it again one by one. Th...
by Kajman
Mar 17 2019 3:02pm
Forum: Items for Sale - Used
Topic: FS: Lifepo4 HiPower 64 Cells + BMS
Replies: 7
Views: 1031

Re: FS: Lifepo4 HiPower 64 Cells + BMS

What is size of one cell?
by Kajman
Mar 17 2019 2:30pm
Forum: Items for Sale - Used
Topic: 10s3p/20s3p Sony VTC6 battery packs 9Ah, 333Wh, EU
Replies: 2
Views: 566

10s3p/20s3p Sony VTC6 battery packs 9Ah, 333Wh, EU

Hi, I have for sale new packs, they have only 2 test cycles done, no BMS (can sell new bms with or build in for additional cost), cells are slightly secured from moisture, high current cells connectors. For someone with little skills easy to connect parallel or in series to create 20s3p or 20s6p or ...
by Kajman
Feb 25 2019 11:57am
Forum: Items for Sale - Used
Topic: Sold: Complete BMW i3 battery for sale.
Replies: 7
Views: 844

Re: Complete BMW i3 battery for sale.

I have been playing with those cells. They can lay down to 1v for half a year and work later without IR change, they are so durable like LiFe, not many 18650 can do this
by Kajman
Feb 25 2019 4:23am
Forum: Items for Sale - Used
Topic: Sold: Complete BMW i3 battery for sale.
Replies: 7
Views: 844

Re: Complete BMW i3 battery for sale.

Joachim, you don't know this chemistry, they don't really care about it, it is sooo different than 18650 or lipos.
by Kajman
Feb 24 2019 2:47pm
Forum: Items for Sale - New
Topic: 13s18p 48,1v 40,5Ah/1950Wh Sony US18650V3 battery, EU
Replies: 1
Views: 393

13s18p 48,1v 40,5Ah/1950Wh Sony US18650V3 battery, EU

Hi, I have for sale new battery in great housing. If someone thinks, can put there controller too. Battery is new, never been charged, has broken cells holder on one side what you can see on one photo. I have no idea if BMS is working or how it should be, so BMS I describe as not functional, but it ...
by Kajman
Dec 09 2018 4:53am
Forum: Items for Sale - New
Topic: Europe NEW LiFePo4 A123 15S6P 54v/49.5 618Wh high current battery pack
Replies: 4
Views: 1113

Europe NEW LiFePo4 A123 15S6P 54v/49.5 618Wh high current battery pack

Hi, I have from unfinished project completely new, assembled by BMZ Germany high current 15s6p batery pack built with ANR26650M1B cells, which are known to be best lifepo cells in the world. This battery can do according to spec up to 300A constant current. As I have checked ANR26650m1b they really ...