Search found 238 matches

by Joachim
Jan 18, 2018 12:34 pm
Forum: Battery Technology
Topic: Battery problem, voltage but no current
Replies: 4
Views: 131

Re: Battery problem, voltage but no current

the bms doesnt like the current peak to charge the empty controller caps....a smal coil between battery and controller will wurk.
by Joachim
Jan 08, 2018 1:51 pm
Forum: Battery Technology
Topic: 36kwh battery porn VW 25Ah Sanyo cells+test
Replies: 8
Views: 378

Re: 36kwh battery porn EV project

Image
Image
Image
Red line:Voltage
Bleu line:Amps
Green line:IR(Low 14Milliohm@13A dsicharge)
Temp wurkshop 15C
by Joachim
Jan 08, 2018 7:49 am
Forum: Battery Technology
Topic: 36kwh battery porn VW 25Ah Sanyo cells+test
Replies: 8
Views: 378

Re: 36kwh battery porn EV project

Discharge the 7S 1P pack.
charge 4.2V cell.
End discharge 3.10V
Discharge Amps 13A continue
IR 14 Milliohm :lol:
Discharge time 2 hours.

Result:25.87Ah 666,47Wh for the 7S 1p pack so singel cell wil store 95.21Wh.

Results are perfect.
I wil post the discharge data sheet.....
by Joachim
Jan 07, 2018 4:57 am
Forum: Battery Technology
Topic: 36kwh battery porn VW 25Ah Sanyo cells+test
Replies: 8
Views: 378

Re: 36kwh battery porn EV project

Take them appart is easy,i dont have them for free :lol: I have to check al the modules for ballans and healty voltage first,the ones i already checkt are al 23.04V 6s 2p/3.83V for the 2p cells. Hope to get 23-24Ah out of the cells on a test,i can only test 7s 10s 13s battery.so 7S 25V 25Ah pack nex...
by Joachim
Jan 06, 2018 12:20 pm
Forum: Battery Technology
Topic: 36kwh battery porn VW 25Ah Sanyo cells+test
Replies: 8
Views: 378

36kwh battery porn VW 25Ah Sanyo cells+test

The last 6s 2p VW modules....these modules have a smal problem with the thermoswitch(nothing to do with the cells)on top of the black cover....so they want to destroy the modules :shock: happy to have them in my hands now so i can use them were they were bluid for. http://i68.tinypic.com/chxkz.jpg h...
by Joachim
Jan 03, 2018 8:04 am
Forum: EV Business World
Topic: Tesla-Hesla 1000km range????
Replies: 0
Views: 192

Tesla-Hesla 1000km range????

A Dutch guy/campany build a fuel cell in a model s tesla and he claims 1100km range :shock:
What do you think?real are just a good story.....100/150km more range?
http://www.thedrive.com/sheetmetal/1579 ... la-model-s
by Joachim
Jan 02, 2018 3:58 pm
Forum: Battery Technology
Topic: 35A BMS for a 10S4P 2900mAh-10A battery?
Replies: 22
Views: 390

Re: 35A BMS for a 10S4P 2900mAh-10A battery?

www.nkon.nl they have fresh PF cells in stock.40x for 110Euro...so 2.75 for a cell.
Also look for the positieve terminal protection papers and nickel strip...if you needs these,self welding the pack?
by Joachim
Jan 02, 2018 12:57 pm
Forum: Battery Technology
Topic: 35A BMS for a 10S4P 2900mAh-10A battery?
Replies: 22
Views: 390

Re: 35A BMS for a 10S4P 2900mAh-10A battery?

Just take the 10s 4p panasonic pf please and use the 35A bms....save for the cells/compleet pack and twice the rating of the controller amps.You can get a panasonic pf cell for 2.60Euro so 40 cells like 104Euro.I think this is cheap for these good cells. Lower 5 6A cells have more stress and higher ...
by Joachim
Jan 02, 2018 6:31 am
Forum: Battery Technology
Topic: 35A BMS for a 10S4P 2900mAh-10A battery?
Replies: 22
Views: 390

Re: 35A BMS for a 10S4P 2900mAh-10A battery?

4p lower 5A cells.....max discharge for the battery 20Amp,ooh sh#t the bms 35A :roll: i dont like these kind of batterie builds! After a year this pack hits the second hand market and someone thinks hey a nice cheap battery 35A bms and put the battery on a bike with a 30A controller :mrgreen: yes th...
by Joachim
Dec 28, 2017 11:58 am
Forum: Items for Sale - Used
Topic: tesla module EU
Replies: 19
Views: 1537

Re: tesla module EU

why 3 Euro for a secondhand nakked panasonic/Tesla 2800mah cell :?:
by Joachim
Dec 27, 2017 9:08 am
Forum: Battery Technology
Topic: Inquiry Regarding Battery Configuration
Replies: 6
Views: 193

Re: Inquiry Regarding Battery Configuration

You need the max amps the controller takes and how much amps/c a singel cell can discharge
I think 7s 5p 6p battery wurks for the 350watt system,7s 25A Li-ion bms....25.2Volt 15Ah battery pack
by Joachim
Dec 18, 2017 8:41 am
Forum: Battery Technology
Topic: Can electric scooter controller specs be found on outside of controller casing?
Replies: 13
Views: 247

Re: Can electric scooter controller specs be found on outside of controller casing?

I have buy a Lifepo4 battery from china 15s 15Ah. After 1 year 3000km the battery compleet sucks under max amp drawn(20A max) cold temps the voltage under load drops from 53V to 46Volt :x top speed goes down from 46kmh to 37Kmh :| range sucks after 1 year and i pay 500Euro for the pack :oops: I ride...
by Joachim
Dec 18, 2017 2:02 am
Forum: Battery Technology
Topic: Can electric scooter controller specs be found on outside of controller casing?
Replies: 13
Views: 247

Re: Can electric scooter controller specs be found on outside of controller casing?

Yes Lifepo is the best for EV :wink: Al the EV and china EV is using lifepo because they are big-heavy-long life and not cheap :mrgreen:
by Joachim
Dec 17, 2017 6:52 am
Forum: Battery Technology
Topic: Can electric scooter controller specs be found on outside of controller casing?
Replies: 13
Views: 247

Re: Can electric scooter controller specs be found on outside of controller casing?

most of the controller have a label on top are down.
48v 800W sla scooter controller have a max discharge 25-35Amp and the low voltage stop between 42-43 Volt.

Why you like to go Lifepo??they have long live and wurk perfectly for enegie storage,not for EV e-scooters bikes.
by Joachim
Dec 17, 2017 6:34 am
Forum: Battery Technology
Topic: Where is the fault in this battery ?
Replies: 15
Views: 424

Re: Where is the fault in this battery ?

the welds are looking dark/bleu...machine is welding to hard/hot.
by Joachim
Dec 10, 2017 5:39 pm
Forum: Battery Technology
Topic: BMS problem
Replies: 26
Views: 509

Re: BMS problem

no first check the bms wurks on lower voltages to be sure the board is not for 4s lfp.

The cells you use are Li-ion 3.6-3.7V talking about the bms now.
by Joachim
Dec 10, 2017 5:16 pm
Forum: E-Bike Photos & Video
Topic: Vector bike and frame owners.
Replies: 824
Views: 72050

Re: Vector bike and frame owners.

Joachim, I will be building one almost exactly like yours, hope you don't mind if I ask a few questions for guidance. How did you paint the wheels, just rim or spokes and all. I want to paint just the rims on mine. Any prep advise would help. You need the right paint.i have paint alluminium car whe...
by Joachim
Dec 10, 2017 5:01 pm
Forum: Battery Technology
Topic: BMS problem
Replies: 26
Views: 509

Re: BMS problem

maby the bms is more like 4s 12.8V lifepo bms? discharge the 4 cells down to 3.3V and connect the bms....discharge-charge okey and charge stops @3.6V singel cell-14.4Volt total pack this bms wil be for lifepo.I have wrong bms here from the same company:order 3s li-ion/lipo bms and they send 4s lifep...
by Joachim
Dec 10, 2017 4:44 pm
Forum: Battery Technology
Topic: The 3500mAh heavyweight division: Sanyo NCR18650GA vs Panasonic NCR18650GA vs LG MJ1 vs Samsung INR18650-35E
Replies: 24
Views: 1140

Re: The 3500mAh heavyweight division: Sanyo NCR18650GA vs Panasonic NCR18650GA vs LG MJ1 vs Samsung INR18650-35E

The temperature have big effect on the energie(wh)you can take out of a cell.

i like to see how meny Wh,s these cells give@ 30/40 degree celsius :idea:
by Joachim
Dec 01, 2017 12:27 pm
Forum: Battery Technology
Topic: How to recell Bosch Powerpack batteries?
Replies: 6
Views: 869

Re: How to recell Bosch Powerpack batteries?

Yes you can use thin wires on the smal bms conector..wurks perfect.My company fietsaccuspecialist already rebuils 30+ of these bosch packs :mrgreen:
I put some smal fusses on each ballans wire-battery side to be sure there never be shorts between cells&ballans/sense wires.
by Joachim
Nov 13, 2017 4:03 pm
Forum: Items for Sale - New
Topic: Sur-Ron - New Mid drive Bike group buy EU
Replies: 103
Views: 7248

Re: Sur-Ron - New Mid drive Bike group buy EU

EU market wil be to smal for these electric dinky toy bikes :oops: 35-45km range wtf :mrgreen:
by Joachim
Nov 09, 2017 3:12 am
Forum: Items Wanted
Topic: looking battery stealth bomber
Replies: 1
Views: 161

Re: looking battery stealth bomber

send pm i can build a propper battery in the size/shape you need ,Ah Voltage you like to have.
by Joachim
Oct 29, 2017 10:21 am
Forum: Items for Sale - New
Topic: Sur-Ron Light Bee USA group buy
Replies: 158
Views: 8527

Re: Sur-Ron Light Bee USA group buy

so they give the battery 3x a 100% charge-discharge in de the factory to test the battery?
the video shows some real good driving skills :shock: no helmet :x
by Joachim
Oct 29, 2017 6:16 am
Forum: Items for Sale - New
Topic: Sur-Ron Light Bee USA group buy
Replies: 158
Views: 8527

Re: Sur-Ron Light Bee USA group buy

On the review website you write:the bike was 50% charge so i take it for a ride.....a new battery first needs a ful charge :idea:
by Joachim
Oct 29, 2017 6:12 am
Forum: Items for Sale - New
Topic: Sur-Ron Light Bee USA group buy
Replies: 158
Views: 8527

Re: Sur-Ron Light Bee USA group buy

sounds good,size perfect for bigger people,motor runs perfect :| and have a lot power....... :mrgreen: i will buy a new LMX for sure :D