[gwayne]

You can certainly run them more than 2 in series. What matters is what they are connected to. Those batteries have a peak voltage of ~65 volts (4.2 x 16). Of course, you can set your BMS to have a lower max voltage to extend your battery life. So say you charge them to a max of 60 volts, you can put 3 in series as long as your motor/controller can handle 180 volts, etc.

By any chance, do you know what the rated peak discharge of those batteries is? Thanks and have fun. gw

 

[gwayne]

Let's back up a step. You have six batteries and are asking which way they should be configured - cart before the horse.

Normally you (overly simplified):
i) pick the car you wish to convert conscious of its weight, drag, etc.
ii) pick the motor(s) and controller(s) you wish to use to provide the desired performance using one of the available performance models;
iii) choose a series of modules and cells necessary to produce the input voltage required to drive the controller
iv) choose the number of modules or cells necessary to produce the driving range (kWh) and/or the performance (peak current) you want.

gw

 

[gwayne]

If you use the standard voltage Hyper 9, you can put 2 LG Chem modules in series. The High Voltage version won't do you much good since 2 modules in series gives you about 130 volts which is too low for the HV version. 3 modules in series gives you over 180 volts which is too high for the HV version. Good luck with your project. gw

 

[gwayne]

The standard Hyper 9 motor is good quality and produces much more power for the money then the HP-50. The reason EV West carries them is they provide very good power/$. I use 2 of them for a cobra kit car I've made and we are using 2 of the HV type for a conversion of a 1950 Chevy Pickup. Given the batteries you have, I'd run them 2S3P. That will fully power the motor and give you 75 miles of range or more depending upon how light your car is.

DO NOT open up the batteries. The plastic cases are factory welded shut. Those batteries have a voltage tap for each cell. Those batteries have a socket for 16 voltage taps and 4 thermister taps. The pin-outs are listed on the EV West site. If you need to get the matching plug, Thunderstruck should be able to provide you with the plugs and crimps, especially if you use their BMS. I would ask John at Thunderstruck for the best topology to wire their BMS to you 2 modules in series, 3 in parallel.

gw