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EnerDel Publicly Reveals Their HEV Lithium-ion Battery Specs
October 29th, 2007 | Posted in: Battery
First of all, to be clear, EnerDel has not been selected to make the Volt’s battery pack. They are on our site because the government selected them as one of 5 companies to receive research funding (some of those dollars come from GM).
Today they made public the specs on the HEV (not PHEV) lithium-ion pack they recently revealed. This allows us some insight into what is needed for the Volt project.
The technical presentation is here: (LINK)
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Posted by: Lyle
9 Responses to “EnerDel Publicly Reveals Their HEV Lithium-ion Battery Specs”
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October 29th, 2007 at 4:20 pm
Looks like the direct file link is: http://enerdel.com/pdfs/EnerDelTechnicalPresentation.pdf
Interesting, especially the nail tests. One thing that does concern me, but they qualify with a “data demonstrates further improvements capable”, is the cycle life (slide 39)– does that indicate that after about 600 cycles they’re only retaining 80%? I’d guess that’s full discharge/charge cycles. I’m curious how that might translate to the repeated partial discharge/charge that would happen with the ICE and regen braking.
October 29th, 2007 at 4:26 pm
On a related note, is it normal for battery manufacturers to be so forthcoming with their data? I applaud EnerDel for doing so, as even though it’s not directly what we’d need to know for something like the Volt, it is helpful in understanding what they can get with their chemistry. Interesting stuff, indeed.
October 29th, 2007 at 4:56 pm
MC-
The cycle life diagram you’re referring to was for their hard carbon anode, not the LTO anode that is in their HEV packs. The HC is higher energy, and probably intended for eventual PHEV use.
And yes, 80%capacity at 700 cycles, while using only 1C/1C charging/discharging, at 30 degrees C -> This is rather disappointing performance, but I guess that’s why they’re selling LTO first.
October 29th, 2007 at 5:11 pm
They also did NOT reveal exact energy or power densities, so this isn’t full disclosure. A lot of the PDF is cut and paste from their website.
However, past info on this site has indicated that the pack holds 600Wh. At 23kg for the pack, that’s 26Wh/kg. Sounds horrible but it also takes into account the weight of all the packaging equipment - the metal box, the control circuitry, etc. The cells are also optimized for power, not energy.
It’s worth noting that Altair’s LTO HEV packs are in the low 30’s.
October 29th, 2007 at 8:33 pm
Lyle,
I heard your latest interview with A123.
Can you also take a second interview with Compact power on the status ? It looks like both the technologies are promising.
November 6th, 2007 at 10:52 am
looks good
November 6th, 2007 at 11:12 am
test
November 6th, 2007 at 11:14 am
OK looks like you can’t post hyper links
AES it looks as if the
Energy denisty is > 80k-h/kg
Source is page 82 of the Elecric Vehicle Battery test procedures manual at uscar.org
Seeing they passed phase 2 they would have to meet this criteria.
November 12th, 2007 at 9:27 pm
Per EnerDel press release, the company has funding from both Dow Chemical and Delphi, formerly a GM subsidiary, working out of bankruptcy. They announced they’re planning to build a production facility in Indiana.