Search found 8 matches

by stealthhack
Feb 24 2015 9:56am
Forum: E-Scooter and Motorcycle General Discussion
Topic: how to program a sevcon gen4
Replies: 215
Views: 76841

Re: how to program a sevcon gen4

Guys can you help me with configuring the sevcon gen 4 80V size 6 to AD AC24LS motor, i'm new with these inverters and my knowing is very limited, i manage to spin the motor, but the parameters are mess, so pls help with configuring! I also have Sevcon SCWiz which is a auto-tune wizzard for these co...
by stealthhack
Jul 19 2014 10:00am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 504237

Re: Homemade Battery Packs

Balance PRO discharges-balances at 150mAh. 34p x ~2000mAh = 68,000mAh 150mAh / 68,000mAh = 0.002 = .2% "balance" per hour A single .1V high bank would take ~100 hours to balance ... Worse! ... At near empty ... balancers would spend 100 hours bleeding down all the remaining 20 banks! To be repeated...
by stealthhack
Jul 18 2014 10:55am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 504237

Re: Homemade Battery Packs

stealthhack, buddy be careful with what you are doing. I see you have 3.6V mixed with 3.7V cells. So the max voltage should not go higher than 4.05V and lowest 3.75V otherwise you will be looking for trouble with old cells! Did you do a sag test on each bank while putting a 1C load on the whole pac...
by stealthhack
Jul 18 2014 10:23am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 504237

Re: Homemade Battery Packs

lol a lot of cells. Looks like it's for a go-kart. a car mod would take more amps than laptop cells could handle. 1c at a constant rate will generate heat for those cells, especially in the middle, where there's no airflow. what are you cooling them with? Tesla made 18650 cells with water cooling, ...
by stealthhack
Jul 18 2014 10:18am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 504237

Re: Homemade Battery Packs

teslanv wrote:HOLY SH1T!
I count 21X34 or 714 cells there!!!
Where do you mount a bank like that? It is for a Car?
Yes it is, but it needs proper BMS for longer life! :)
It's TESLA style! :D
by stealthhack
Jul 18 2014 9:37am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 504237

Re: Homemade Battery Packs

Balance PRO discharges-balances at 150mAh. 34p x ~2000mAh = 68,000mAh 150mAh / 68,000mAh = 0.002 = .2% "balance" per hour A single .1V high bank would take ~100 hours to balance ... Worse! ... At near empty ... balancers would spend 100 hours bleeding down all the remaining 20 banks! To be repeated...
by stealthhack
Jul 18 2014 8:24am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 504237

Re: Homemade Battery Packs

Hi guys, i'm new here and i want to ask something. Recently i've built Li-ion 3,6 and 3,7V battery pack for EV project. The battery is 21S34P (wich have bridges between every 1S of the all 34P cells). My balancer will be 4 of these modules: http://www.hobby-time.com/images/atrex/4477-bpro1.jpg My a...
by stealthhack
Jul 18 2014 7:04am
Forum: Battery Technology
Topic: Homemade Battery Packs
Replies: 1681
Views: 504237

Re: Homemade Battery Packs

Hi guys, i'm new here and i want to ask something. Recently i've built Li-ion 3,6 and 3,7V battery pack for EV project. The battery is 21S34P (wich have bridges between every 1S of the all 34P cells). My balancer will be 4 of these modules: http://www.hobby-time.com/images/atrex/4477-bpro1.jpg My as...