deemsh
Posts: 5
Joined: Wed Mar 26, 2014 6:38 pm

Main battery pack weight?

I have looked through the posts in this section but I haven't been able to find a weight for the Main Battery Pack assembly.
2012 iMiEV
Pine Mountain, Georgia
Don
Site Moderator
Posts: 3101
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: Main battery pack weight?

Welcome to the forum!

A quick Google search shows the weight as 363 pounds

Don
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deemsh
Posts: 5
Joined: Wed Mar 26, 2014 6:38 pm

Re: Main battery pack weight?

Finally got around to replacing battery. I put the battery on certified scales, weight was 520 lbs. The 363 my have been the weight for just the cells.
2012 iMiEV
Pine Mountain, Georgia
DBMandrake
Posts: 298
Joined: Mon Mar 20, 2017 4:57 am
Location: Scotland

Re: Main battery pack weight?

deemsh wrote:Finally got around to replacing battery. I put the battery on certified scales, weight was 520 lbs. The 363 my have been the weight for just the cells.
I'm quite skeptical of this. The cells weigh 1.73Kg each (I just weighed one of the ones I'll be fitting soon on a digital scale) so that's 152Kg of cell weight for 88 cells.

If the whole assembly really weighed 235Kg that means the chassis and bus bars weigh 83Kg, or nearly half as much as the cells.

Given the chassis is only 1.4m long by 0.7m wide mild steel panel, I can't see how the empty battery chassis would weigh anything near 83Kg. I'd guess it doesn't weigh any more than about 30Kg.
- Simon

EV: 2011 Peugeot Ion
ICE: 1997 Citroen Xantia V6
DBMandrake
Posts: 298
Joined: Mon Mar 20, 2017 4:57 am
Location: Scotland

Re: Main battery pack weight?

Just to add to this, when I had my pack out to swap some cells I had it on a small wooden framed trolley I built with some 80mm castor wheels, and I was able to pull the battery pack up a small incline to my garage by myself with two ropes attached to the trolley. It wasn't easy but I very much doubt it weighs 253 killograms or I wouldn't have been able to move it up an incline on rough concrete at all.

Another thing I discovered on disassembly is that the majority of the battery "chassis" is not steel, but is either fibreglass or thick reinforced ABS plastic of some kind. The steel chassis is a relatively thin layer at the bottom underneath this fibreglass/plastic to support it.
- Simon

EV: 2011 Peugeot Ion
ICE: 1997 Citroen Xantia V6
Ruudi
Posts: 12
Joined: Sun Mar 13, 2016 3:45 am
Location: Estonia

Re: Main battery pack weight?

I have one empty battery case here, thought how much would that weight. There was no steel case cover attachment parts and bolts, even the integrated main battery fan is removed.

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I wouldn't call this bottom steel part light, it's quite strong. There are four transversely located boxed sections made from 3mm (maybe even strengthened) steel.

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The case is already to be sold to one person in Estonia who is planning to use it for integrating new cells in there.

It was 52kg or 114.64 pounds

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