A123 Battery Pack from a 2014 Chevy Spark EV

A123 Battery Pack from a 2014 Chevy Spark EV

Well the battery has landed!!  It is a A123 battery pack from a 2014 Chevy Spark EV.  The 2014 Spark EV was the only year that carried the A123 battery modules.  The pack contains 4 modules of 92.4v each with a total of 24 kWh capacity.

The pack essentially is in three parts 1) the neck, 2) front half, and 3) rear half.  The front and rear halves hold 2 battery modules each – in the original car the halves sit fore and aft of the rear axle.  The neck of the battery module contains the contactors (high-voltage relay switches) and pre-charger circuit (to protect against voltage in-rush).Battery Pack with Cover Off

I looked at every possible configuration of using Tesla battery modules, but it wasn’t going to work.  First off Tesla modules are expensive, oddly shaped (for fitting in a previously engine car), and you need a min of 8 (modified modules) or 16 (unmodified) to get to 400v.  The modified modules require non-trivial modifications to the HV connections inside the pack.

I will be splitting the neck, front and rear halves of the Spark EV pack into separate parts. The front and rear halves will remain in the modified casing and will sit in the DeLorean’s engine bay area.

2 thoughts on “A123 Battery Pack from a 2014 Chevy Spark EV

  1. How much was the cost? I am considering Tesla modules, which as you said are expensive but will work. Also, have you thought about getting two of these hooked up in series for a total of 48 volts? You could get some real mileage there.

    Andrew

    1. I’ve seen Tesla battery modules (model S) in the $1,100 to $1,400 range. To get the 400V needed for the Tesla drive unit, I would need 16 of the battery modules (~24v each). 16 x $1,200 = $19,200… It would certainly have a much longer range, but it would likely not fit in the car’s available space or weight limits. There are some options to be ‘re-routed’ Tesla battery modules that would reduce the count to 8 modules, but modifying the battery module is beyond my comfort level.

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