embers
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Battery Pack Mass Properties

Thu May 23, 2013 5:20 pm

Greetings. I am an engineer working on a new type of battery. I am collecting data on battery pack mass properties to do a comparison between the new battery and existing Li-Ion batteries. I would like to use the Nissan Leaf as a baseline. I understand the weight of the total pack is 300 kg. But I am looking at the weight of the whole system and the weight of each component.

The information I would like is the weight of the modules (there are 48 consisting of 4 cells), the weight of each of the different systems (battery management systems, thermal management or environmental control systems) connectors, harnesses, frame/case, etc. In other words (for the engineers in the forum) a battery pack bill of materials (BOM) and the associated weights.

Thanks very much,

QueenBee
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Re: Battery Pack Mass Properties

Thu May 23, 2013 8:04 pm

Good luck getting the level of detail without buying a LEAF and tearing it apart to weigh everything :)

kovalb
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Re: Battery Pack Mass Properties

Fri May 24, 2013 12:33 pm

There was also a change from the 11/12MY to the 13MY. The way each module is packaged was slightly changed and I believe the pack weight was reduced slightly.
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KJD
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Re: Battery Pack Mass Properties

Fri May 24, 2013 5:15 pm

The only thing that I could find was an old thread talking about one cell specifications.

http://www.mynissanleaf.com/viewtopic.php?f=9&t=3498" onclick="window.open(this.href);return false;
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embers
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Re: Battery Pack Mass Properties

Sat May 25, 2013 9:33 am

Thanks all. I know what a Quixotic task this is but I am hoping there is someone who is more of a zealot than me that has this kind of info.
I'll let you all know what I discover.

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surfingslovak
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Re: Battery Pack Mass Properties

Sat May 25, 2013 9:53 am

Embers, please try the this link. Module weight was 8.3 lbs and cell weight was 1.8 lbs in 2011, but some of this information could be outdated by now, much like kovalb said upthread. the big unknown is the weight of the steel battery container. Since we know its dimensions, assuming certain thickness of the material, the weight of the battery pack case could be estimated.Image

CrainAdam
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Re: Battery Pack Mass Properties

Wed Jul 24, 2013 5:58 am

Did the changes in it make any difference in the battery ?
Last edited by CrainAdam on Sun Aug 04, 2013 9:34 pm, edited 1 time in total.

LEAFfan
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Re: Battery Pack Mass Properties

Wed Jul 24, 2013 9:07 am

CrainAdam wrote:Did the changes in it make any difference in the battery ?
Besides putting vents in the modules, they tweaked the chemistry. It's too early to tell yet. I had a meter for my 2011 so I can compare the two.
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surfingslovak
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Re: Battery Pack Mass Properties

Wed Jul 24, 2013 9:52 am

LEAFfan wrote:
CrainAdam wrote:Did the changes in it make any difference in the battery ?
they tweaked the chemistry
^^^ Once again, do we have any confirmation that this is in fact the case?

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RegGuheert
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Re: Battery Pack Mass Properties

Wed Jul 24, 2013 12:46 pm

LEAFfan wrote:Besides putting vents in the modules,...
Those aren't vents. There is no airflow in the battery pack. Internal cooling is all through conduction to the bottom plate. The changes are simply weight reduction.
surfingslovak wrote:^^^ Once again, do we have any confirmation that this is in fact the case?
Yes.
RegGuheert
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