SEVC
  • HOME
  • MR2EV
  • Emax
  • ELISEV
  • Links
  • Contact
  • HOME
  • MR2EV
  • Emax
  • ELISEV
  • Links
  • Contact

The First Battery Pack (Thundersky)

8/6/2016

0 Comments

 
Picture
After deciding on a motor and inverter combination, the next challenge when planning an EV conversion is choosing the traction battery pack voltage, capacity and chemistry. Which impacts the motor performance, vehicle dynamics, high voltage cabling, pack size and battery mounting options.
There are many tools for sizing the battery pack for electric vehicle conversions and I investigated several, but in the end I was forced to use a pragmatic approach to battery selection. The criteria being:
  • Minimum practical pack voltage (The TIM inverter can operate from 80 – 400 Volts).
  • Packaging (I wanted the initial battery pack to be mounted in in the MR2 rear engine bay).
  • Availability (There were not many suppliers of EV components at the time).
  • Product reputation (There was a small selection of batteries commonly used by members of AEVA Sydney).
  • Price (I wanted to purchase the minimum number of batteries practical to start and figured that I would purchase more latter). 
In the end I purchased sixty Thundersky 60ah prismatic lithium-ion batteries and braided links from EV Works in Perth.
Picture
Picture
I was pretty excited when they were delivered!
Picture
The battery box was fabricated by Geoff O’tool from GT Tooling and mounted in the rear engine bay.
Picture
Picture
Because the final dimensions of the battery box meant only 56 cells would fit, the final traction battery pack specifications were:

56 cells * 3.6Volts        = 201.6 Volts
2.5 kg * 56 cells           = 140 kg
60 * (56 * 3.6) / 1000  = 12.1 kilowatt/hour
Picture
This is a picture of the pack installed in the rear engine compartment. I drove MR02EV for about 3 years with this setup before embarking on a replacement, which I will describe in a future post.

You can also see the Batrium battery management cards mounted on the top of each cell. Its a great system and I will write more about that also.
0 Comments



Leave a Reply.

    Michael Day

    I have a Degree in Electrical Engineering from the University of Technology Sydney and am employed in Broadcast Television Industry. My hobby is the (continuing) modification of MR02EV. I am also the National Treasurer of the Australian Electric Vehicle Association.

    Archives

    October 2018
    April 2018
    October 2017
    March 2017
    January 2017
    December 2016
    November 2016
    September 2016
    August 2016
    June 2016
    May 2016
    April 2016
    March 2016
    February 2016
    January 2016

    Categories

    All
    12 Volt Systems
    Batteries
    Battery Managment
    Brakes
    Charger
    General Components
    Inverter
    Motor
    Transmission
    Vehicle

    RSS Feed

Proudly powered by Weebly