TomMoloughney
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Re: Official BMW I3, I8 / megacity EV thread

Thu Apr 25, 2013 8:55 am

RegGuheert wrote:
TomMoloughney wrote:I did a post for BMWBLOG on the battery capacity loss I've measured on my ActiveE after 44,000 miles and 1,000 recharges. I know battery capacity loss is an important topic here so I thought you'd appreciate the link:

http://www.bmwblog.com/2013/04/25/under ... city-loss/
That's an NMC chemistry, correct? This is the chemistry slated to be in the LEAF in the future.

Yes, exactly. They were developed by SB-LiMotive which was a partnership between Samsung and Bosch. The ActiveE was the first EV to use these cells. Now the Fiat 500e will be using them and once BMW i launches all of their plug in offerings(for now the i3 & i8 but others are in development) will use them. BMW is very happy with their performance so far.

Recently Bosch bought out Samsung though, and the new entity is called Robert Bosch Battery Systems.
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TomMoloughney
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Re: Official BMW I3, I8 / megacity EV thread

Thu Apr 25, 2013 8:59 am

edatoakrun wrote:
TomMoloughney wrote:Not sure if this is the right thread for this, but since it's about my ActiveE and on BMWBLOG I figured to post it here.

I did a post for BMWBLOG on the battery capacity loss I've measured on my ActiveE after 44,000 miles and 1,000 recharges. I know battery capacity loss is an important topic here so I thought you'd appreciate the link:

http://www.bmwblog.com/2013/04/25/under ... city-loss/
="TomMoloughney"]
...When the car was new, I was measuring on average about 27.4 kWh’s available to me and now that number has shrunk to about 25.25 kWh which is about an 8% capacity loss....
How do you measure your available kWh?

Doesn't sound like ATM gives much if any benefit in your climate.

But since you'd need a LEAF with ~ the same charge cycles and temp exposure and with an accurate range test or metered recharge record to determine the LEAFs actual available capacity loss, and to compare with yours, we probably can't answer that question.
I record info like my consumption rate, starting & ending SOC, and miles driven every time I plug in. by having that info I can calculate what capacity is available to me, especially with driving the car to zero state of charge on occasions. The graph represents 1,000 data entries(recharges) with one point on the graph for the average of the last 40 records. I also monitor the energy used to recharge the pack. With that I have to factor in charging losses though but the decline does mirror what I see from my driving records.
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TonyWilliams
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Re: Official BMW I3, I8 / megacity EV thread

Thu May 09, 2013 11:14 am

"Will the i3 be eligible for the $7,500 federal tax credit, though? BMW has not completed its discussions with the government on the matter. So don’t hold your breath."

Read more: http://www.digitaltrends.com/cars/bmw-p ... z2Sov75CYo" onclick="window.open(this.href);return false;
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LTLFTcomposite
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Re: Official BMW I3, I8 / megacity EV thread

Thu May 09, 2013 11:53 am

TonyWilliams wrote:"Will the i3 be eligible for the $7,500 federal tax credit, though?
Why wouldn't they?
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Re: Official BMW I3, I8 / megacity EV thread

Thu May 09, 2013 1:02 pm

LTLFTcomposite wrote:
TonyWilliams wrote:"Will the i3 be eligible for the $7,500 federal tax credit, though?
Why wouldn't they?
Of course it will qualify for the full $7,500 federal tax credit. The author just isn't knowledgeable on this matter. Any plug in passenger car (BEV or PHEV) with a battery 16kWh's or larger qualifies for the full $7,500 tax credit. John Voelcker did a follow up story on this: http://www.greencarreports.com/news/108 ... w-3-series" onclick="window.open(this.href);return false;
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Boomer23
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Re: Official BMW I3, I8 / megacity EV thread

Thu May 09, 2013 1:08 pm

LTLFTcomposite wrote:
TonyWilliams wrote:"Will the i3 be eligible for the $7,500 federal tax credit, though?
Why wouldn't they?
The article has been discussed in other circles and it's poorly researched. There is no reason why the i3 wouldn't qualify for the $7,500 Federal tax credit because that credit is based on battery capacity, not on the gas range extender. Same reason the Volt qualifies for the full credit.

The Calif rebates are another matter. The rebate for the REx version is yet to be determined. Perhaps that was the source of some of the confusion.
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TonyWilliams
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Yet another charging standard !!!

Thu May 09, 2013 7:51 pm

The dust hasn't settled on Frankenplug, but here goes the next "standard" battle. How come I think it will be everybody involved EXCEPT the leader in volume EV production, Nissan?

"Inductive charging potential is now an ongoing subject for BMW; the company wants to see an international standard established and has founded an official workgroup with German manufacturers under the aegis of the German Commission for Electrical, Electronic & Information Technologies. BMW says various manufacturers are also communicating on the issue at an international level."

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Re: Official BMW I3, I8 / megacity EV thread

Thu May 09, 2013 7:53 pm

Interesting article on how the BMW i3 is made, including a lot of information about the CFRP construction and plastic exterior panels, and a little detail on how the battery cooling system works:

http://www.sae.org/mags/AEI/tools/12056" onclick="window.open(this.href);return false;
The i3’s Drive Module is provided by BMW’s Dingolfing plant and completed at Leipzig. It is screwed and glued to the Life Module. The underfloor lithium-ion battery has eight modules and 96 cells. Although the cells are supplied, the battery modules are a proprietary development of BMW and manufactured at Dingolfing. The individual battery blocks each have their own safety system.

The car’s air conditioning refrigerant cools the i3’s battery pack, obviating the need for fans or additional pumps. Heat for preconditioning in low temperatures comes from the charging electricity supply. The cabin is heated via a heat pump in urban traffic, a 30% saving against regular electric heating. Battery performance typically shows a 5% degradation at -15°C (+5°F), and testing has been completed down to -35°C (-31°F).
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Re: Official BMW I3, I8 / megacity EV thread

Thu May 09, 2013 8:23 pm

Nothing like a Think at all...

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Re: Official BMW I3, I8 / megacity EV thread

Fri May 10, 2013 6:34 am

Boomer23 wrote:
LTLFTcomposite wrote:
TonyWilliams wrote:"Will the i3 be eligible for the $7,500 federal tax credit, though?
Why wouldn't they?
The article has been discussed in other circles and it's poorly researched. There is no reason why the i3 wouldn't qualify for the $7,500 Federal tax credit because that credit is based on battery capacity, not on the gas range extender. Same reason the Volt qualifies for the full credit.

The Calif rebates are another matter. The rebate for the REx version is yet to be determined. Perhaps that was the source of some of the confusion.
In addition, the odd way that the IL EPA cash rebate on EV's would also qualify (if they still have funds) on the i3 with the range extender version because it will be quite similar (although less overall range) than the Volt being a 'generator' type engine to the battery pack and not just an ICE with a battery pack (like the C-Max Energi which doesn't qualify). AW speculated like others than it would retail around $45K but not sure how much more the range extender model would cost but with a total range of 186 miles it's not bad.
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