Search found 172 matches

by nuxland
Aug 12 2020 1:15am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 151
Views: 39042

Re: Electric kart

......But with my calculations and test (I tested 25kw gap in the same track and got 1,6Ah or 1,6kwh per lap) I would consume about 80Ah or 80kwh of energy...... ???..i suspect you missed a decimal point out of your kWh figures > :wink: :bigthumb: Yes, you are right. Corrected in the original post ...
by nuxland
Aug 09 2020 3:48am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 151
Views: 39042

Re: Electric kart

Did modification to my windows logging software, so it could now automatically detect what battery pack is installed. There will be endurance race at the end of month, 50 laps in a 1km track. I need to cap my performance so that i could drive 50 laps and not overheat my motor. But with my calculatio...
by nuxland
Aug 07 2020 1:42pm
Forum: E-Scooter and Motorcycle Photos & Videos
Topic: Yamaha FZR-8000 Genesis
Replies: 58
Views: 10098

Re: Yamaha FZR-8000 Genesis

I'm using this in my kart, its very small and light.
https://www.mouser.ee/ProductDetail/108-HA1SV12008PRFA
by nuxland
Jun 30 2020 10:32am
Forum: Items for Sale - New
Topic: Nucular electronics - complete kit for ev! [beta]
Replies: 1414
Views: 147565

Re: Nucular electronics - complete kit for ev! [beta]

if you have 2 sets of winding it should work Planned but low priority, i heard only 3 people requested it so far If you will implement it in near future, will it also be available with current versions via firmware upgrade? I have a revolt rv-160pro motor that i have installe sin/cos myself, becaus...
by nuxland
Jun 26 2020 3:49am
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

January 2019 I tested one of my 7s 5Ah brick with 70A As you can see that after 3 minutes my duo 4010 stopped discharge because of cell voltage went under 3,5v under load. I must admit that it was not charged to 4,2v but to 4,1v so there can be a little bit more inside :) And as I said earlier I got...
by nuxland
Jun 24 2020 12:57pm
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

I used in practice 5,37Ah and in 1st race 6,44Ah, so together 11,81Ah. Battery should be 35Ah but when I tested one brick with 70A then usable was around 3,6Ah, that makes usable in whole battery 25,2Ah :) And as cell voltage after 1st race were around 3,81v i tought that i let lipo be in storage vo...
by nuxland
Jun 24 2020 11:31am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 151
Views: 39042

Re: Electric kart

Went to race lately, it was special race as we used obstacles and only 3 laps each race. All together 1 practice and 3 races. I used at practice and first race my lipo battery and 2nd and 3rd race my smaller lifepo4 battery. There was no elecricity in that track :( And it seems that lipo has more po...
by nuxland
Jun 24 2020 11:26am
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

Tested lipo pack in kart track. Was not regular race but special event, only 3 laps + tire warmer lap. But it seems that voltage drop was very minimal. 558A was max i got on that track (because of the obstacles) and with that voltage was 103,43V. At beginning of the race voltage was 114,51v but max ...
by nuxland
Jun 08 2020 1:49pm
Forum: E-Bike Technical
Topic: Sevcon, subsidiary of Borg Warner
Replies: 15
Views: 397

Re: Sevcon, subsidiary of Borg Warner

How about a wrecked zero motorcycle? You can get from there motor + controller that are already working together, so no need to program the controller. You can use twist throttle also with a kart if you want :) If you make a similar voltage battery that zero has (if battery is broken on wrecked zero...
by nuxland
May 31 2020 12:00am
Forum: Large EV General Discussion
Topic: Electric kart
Replies: 151
Views: 39042

Re: Electric kart

Yes, i have rewelded the sidepods and using larger tube that goes over the frame. sidebars.jpg And i used 5mm aluminium sheets so I could place my first battery cells "winston 60Ah lifepo" 16pcs in left and right. sidebumperholders.jpg With my lighter 37kg small lifepo4 pack left and right side are ...
by nuxland
May 29 2020 12:42am
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

Actually when racing I do not have time to look at my tablet at all. I have cycle analyst in my wheel and in straights i can see how many Ah I have used, but thats also not important anymore, because I know how many Ah i'm using per lap. I have low voltage cutoff configured in sevcon and that is eno...
by nuxland
May 28 2020 8:43am
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

Zeva by themself are selling also master unit.
https://zeva.com.au/index.php?product=132
by nuxland
May 28 2020 4:07am
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

Yes I'm. But zeva bms is not stand alone product. And for me it is just perfect because of that. You need some kind of master communication unit, zeva bms just listens commands and outputs information through canbus. Also it's balance current is very small, but it's not revelant for me. I have 9 pcs...
by nuxland
May 27 2020 7:40am
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

Changed my zeva measurements wires to eliminate false reading due voltage drop between pack interconnections.
And now I can measure what is voltage drop between my packs that are connected to 7x8AWG wires.
Actually lipo bricks have 10AWG wires itself :)
by nuxland
May 25 2020 2:13pm
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

It is actually the same weight as my 2,5kw lifepo4 pack. My small lifepo4 pack has also had over 600A output. The voltage drop were yes a little bit higher in lifepo4 but then lifepo4 does not have voltage drop when it gets empty as does lipo. Yes I measured tempereture in outside of the lipo but th...
by nuxland
May 24 2020 2:32pm
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

Made a quick test today, just one stright road and two accelerations. But it behaved ok (just need to add 3 extra wires for measuring 2,3,4 bricks first cells, right now these showed lower than the rest). So 102,25 Voltage with 615,38 Ampers will do 62922,605 Watts from the battery, biggest amount I...
by nuxland
May 24 2020 12:19am
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

Pack has now sat on balance voltages for a month. in 23th of april voltages were min: 3,830 and max: 3,836 so difference 6mV now today 24th of may there was min: 3,820 and max 3,826 difference still 6mV But discharge was 0,01V or 10mV in 30 days. And this was bms that was taking this :) So we can sa...
by nuxland
May 19 2020 6:09am
Forum: E-Bike Technical
Topic: Sevcon, subsidiary of Borg Warner
Replies: 15
Views: 397

Re: Sevcon, subsidiary of Borg Warner

Hey I do not like your tone :) but i have searched and here are my answers. I got license from this email <sh***ker@borgwarner.com> last time but in 2016 got it from here <****.conboy@sevcon.com> They each time asked from i have bought it and to what company i have bought it to also. I bought my IXX...
by nuxland
May 17 2020 1:50pm
Forum: E-Bike Technical
Topic: Sevcon, subsidiary of Borg Warner
Replies: 15
Views: 397

Re: Sevcon, subsidiary of Borg Warner

I'm not intending to upgrade my software because there is no need doing that.
they, is some guy in sevcon as i wrote email to my reseller when it first expired and they forwaded me to sevcon.

PS! i have replaced my laptop once in these years and they gave me license to the new laptop also.
by nuxland
May 17 2020 1:10pm
Forum: E-Bike Technical
Topic: Sevcon, subsidiary of Borg Warner
Replies: 15
Views: 397

Re: Sevcon, subsidiary of Borg Warner

I bought my IXXAT in 2015. And had to renew each year. As have not used it from 2018 i need to renew it again to be able to program some parameters in my kart. For the renew they did not charge any money but it's inconvient for me. And for a 600€ USB IXXAT device with a license I assumed I will get ...
by nuxland
May 12 2020 8:30am
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

I do plan to charge when arriving on track. As i also have lifepo4 packs then i can charge them previous evening. And then use my 3kw elcon charger to charge lipo on racing track. As i have already balnced them and have zeva bms units inside pack i can easyli charge them all to 4,15v (this is my bal...
by nuxland
Apr 10 2020 6:37am
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

Did a first charge and discharge test yesterday. H8lBknp5E84 It seems i need to charge them again to 4,15V and then use my iCharger 4010 Duo to top balance each parallel 7s group to 4,2v. When I thought it in my mind it did not looked so messy with the balance leads :) Only reason I have built it wi...
by nuxland
Mar 09 2020 8:42am
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

Weighted how heavy is battery box without batteries :)
WithoutBattaries.jpg
WithoutBattaries.jpg (438.94 KiB) Viewed 977 times
Also did first voltage test with 4pcs of 7s bricks in series.
https://www.youtube.com/watch?v=rNIpTjdEGmw
by nuxland
Mar 09 2020 7:32am
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

Some progress :)

Making of harness:
LipoHarnessHalfDone.jpg
LipoHarnessHalfDone.jpg (376.41 KiB) Viewed 992 times
Harness done and final weight:
Harness.jpg
Harness.jpg (232.74 KiB) Viewed 992 times
by nuxland
Feb 12 2020 3:30am
Forum: Battery Technology
Topic: 30Ah 28s LiPo from 7s bricks
Replies: 35
Views: 2552

Re: 30Ah 28s LiPo from 7s bricks

Now two output 350A andersons are done.
Also zeva bms is in place and wired also dc/dc.
Olimex and LCD is still to be added.
And then I need to do all XT90 wires from bricks.