Most INSANE ebike build 530phase AMP 96v QS273 V4

[electriCUTEd]

Ok so here we go.I currently have
Fardriver programmable controller 96530 (330 AMP CONT/ 530 PHASE)
320x Samsung inr21700 s50 cells.(25A cont discharge 45A peak) 5000mah .

Qs motor 273 v4 rated at 8000WATT 96v .
Vector vortex frame with motocycle forks and brakes .
I just started build and I'm having a problem on sheet with battery.( The main question how thick copper +nickel strips I should use for 330A(530phase sick!) 96V battery

 

[amberwolf]

I'm having trouble figuring out your pack configuration.

At 96v nominal, that's typically 26s. 320 cells doesn't divide evenly by that or by 24 or 25, to get the parallel cell group size.

To get 330A continuous battery current at 25A per cell, you need at least 14p (13.2) when the battery is new (more as it ages, which happens faster the harder it is pushed).

For 14p you'd need 14 x 26 = 364 cells. 320 / 26 is only 12p, with leftovers that are presumably spare cells?

Could you clarify the build intent / specifics?

As for thickness, you should probably go to the copper/nickel sandwich thread(s) where various things have been discussed in there. JonesCG has also been doing experiments in a recent thread about this.

Also, it's not just the interconnects, you also will need enough welds to each cell on each end of good enough quality to pass the current out of each cell into the interconnects.

 

[electriCUTEd]

I can get more cells.Build intent well I want to build ebike capable of Doing around 75miles per hour and about 70km of realistic distance on full throttle.

 

[amberwolf]

Without doing a simulation, my guesstimate is anywhere from 150-200Wh/mile at 75MPH, probably at least 7-8kw continous motor output power (probably 20-30% greater output power required from the battery itself because of losses in the system between there and the ground). (assuming completely flat well-paved roads with no wind, etc--any slopes will add power proportional to slope and rider/bike/etc weight, headwinds add power proportional to extra speed this effectively adds (20mph wind + 75mph speed = 95mph actual speed, whcih takes a lot more power than 75, etc), and unpaved surfaces take more power, etc).

Assuming the 200wh/mile, then the ~43miles that 70km converts to would take at least 8600wh. If it's a 96v pack, then you need at least 8600 / 96 = 90Ah (more if you need extra range to compensate for detours, headwinds, terrain, pack aging, cold temperatures, etc).

If you only need 8kw continuous then at 96v that's 8000 / 96 = 84A from the battery (without accounting for non-flat/etc conditions or pack aging, cold, etc).

You could easily double or more the power and capacity requirements depending on the actual types of riding conditions.

Once you define the actual conditions / etc for the job it has to do for you, you can use the various simulators / calculators like those at ebikes.ca, etc., to learn them and do experiments to get better guesstimates of actual power and capacity needed.

 

[electriCUTEd]

Thats exacly what i need .I have parts and motor suited for this .The biggest problem is building a battery i had some experience with nickel spot wielding but that was for 50A max .For such a higher current i need nickle copper sandwich.
And no prob 8,7kWh in this case is 468 batteries

 

[E-HP]

Looks like you need at least a 135V battery, so 37S, to get to 14kW if your controller only can provide 330A. In order to go 70km at 75mph, you need a 8.8kWh battery or 475 cells (481 to be a multiple of 37). You may need to double that as cushion since your speed will decrease below 75mph once the pack is half spent. So that's 75lbs of cells, or 150lbs if you really want to maintain 75mph for the full 70km.


Since the motor is 90% efficient, you'll need to deal with 1400W of excess heat, so you'll need some decent cooling for the motor.