E-max 110s lifepo4 upgrade

[flexy]

That controller is supposed to handle 10KW, you are using 6KW max, what air temperature are you using it in?

[yokneamcity]

That controller is supposed to handle 10KW, you are using 6KW max, what air temperature are you using it in?

+30-35 C

[flexy]

+30-35 C

Nice!

I got my 36 fet today, it's quite big compared to Lyen 18fet

[yokneamcity]

+30-35 C

Nice!

I got my 36 fet today, it's quite big compared to Lyen 18fet

This monster controller!
Where you will plase it?

[flexy]

This monster controller!
Where you will plase it?

I have yet to work this out

[flexy]

This is my battery pack design ,based around the A123 20Ah cells, it consists of four modules each containing 30 cells.

The tabs on each will be bolted to the copper plate to make 5p groups.

The chequer plate cases are the only thing I could get made at short notice. They do present a risk of shorting so I will have to insulate them on the inside at least. I would prefer to use G10 epoxy sheet as it is a good insulator and very rigid + heat resistant.

Each 30cell module will have steel straps to compress the cells and stop any movement.



Download the Sketchup file here https://dl.dropbox.com/u/8208701/Electric%20scooters/Emax%20battery.skp

[yokneamcity]

I finished work on remaking the battery. Battery had three assemblies of 16 cells in series. That were are connected in parallel.(16S/3P) Prismatic packages A123 20 A/H
I decided to pick up the battery voltage to 78 volts. For this, I middle the assembly parted into two parts, each with 8 cells. And added to the two assemblies are 8 cells. The result was a configuration 24S/2P.
Maximum speed increased to 72 km/h.
And also i ordered BMS 24S/100A rated current from BMS_Battery http://www.bmsbattery.com/bmspcm/378-17 ... t-bms.html
In this BMS installed low quality mosfets with high-resistance channel. This has caused a strong heating BMS at maximum current (100A)
But I solved the problem.I connected the controller power cable to the battery directly, through a fuse, bypassing BMS. Logic Plus of controller is connected through a relay that is connected to the battery through the BMS.

[flexy]

72 km/h! I was hoping to get more at that voltage, it's still a good improvement. What sort of range are you getting?

That's a good idea to use BMS to switch a relay. I was thinking of doing the same with my Evassemble BMS, then I can send regen current straight to the battery too.

I'm still waiting for a new controller so no progress yet

[yokneamcity]

72 km/h! I was hoping to get more at that voltage, it's still a good improvement. What sort of range are you getting?

That's a good idea to use BMS to switch a relay. I was thinking of doing the same with my Evassemble BMS, then I can send regen current straight to the battery too.

I'm still waiting for a new controller so no progress yet

72 km/h according to gps, and proximity 80 km/h according to car speedometer.
I gated 50 km range with 72 km/h speed and 100 km range with 50 km/h speed.