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garygid
Gold Member
Posts: 12451
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Details on Nissan Leaf battery pack, charge rates, lifespan

Tue Jun 01, 2010 8:51 am

Just because the EVSE signals it can provide 40 or 50 amps of 240v AC does not in any way require the cars to use that much.

In this case, it appears that the initial LEAFs would only "sip" 15 or 16 amps (about 3.3 kW charging).

We hope that later versions of the LEAF's internal charger will be able to "eat" something like 32 amps (approx. 6.6 kW charging) off the 240v "plate".
See SOC/GID-Meter and CAN-Do Info
2011 LEAF, sold in 2015
2010 Prius, 2014 silver Tesla S
Nissan EVSE, mod to 240/120v 16A
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

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LEAFer
Posts: 2647
Joined: Mon May 24, 2010 10:10 am
Delivery Date: 19 Jan 2011
Leaf Number: 000215
Location: Sacramento Area

Re: Details on Nissan Leaf battery pack, charge rates, lifespan

Tue Jun 01, 2010 9:29 am

Yeah ... I wasn't ignoring that initial 3.3kW limitation. But I was hoping that 16A at level 1 (120V) is possible (120V*16A=1.92kW) rather than being limited to 12A. Of course ... all this speculation can go further.
a. How about TT-30 ("30 amp service") at RV parks ? (120V * 30A * 80% = 2.88kW)
b. How about 208V service at higher amps, but still under 3.3 ? (e.g. 15.9A * 208V = 3.3kW)

Note: Many current EV charging locations only provide 208V rather than the nominal Level 2 240V capability. The first public J1772 charging location was unveiled in Woodland, CA recently. It is 208V (now we just need a LEAF to test it !). Click Here. (Ignore the "Woodside" typo. It's Woodland.)

So ... we need to know a little more than "3.3kW limit" ... we need to know current limit or how the car determines and/or possibly limits it. (Was this already published somewhere else and I missed it?)
2011 Silver SL+QC [Mfg: 11/2010] 36mo/15k LEASE
06Jun2013 Status [28.5 months][34,173 miles][11 bars]
Lost CapacityBar 6/6/13 @34,173 miles while in LEAF Battery Monitor: 83.41%, 71.4F (avg); cool overnight;

User avatar
garygid
Gold Member
Posts: 12451
Joined: Wed Apr 21, 2010 8:10 am
Delivery Date: 29 Mar 2011
Leaf Number: 000855
Location: Laguna Hills, Orange Co, CA

Re: Details on Nissan Leaf battery pack, charge rates, lifespan

Tue Jun 01, 2010 9:54 pm

In charging, the charger usually tries to regulate the DC current going to the battery pack, gradually tapering off as the SOC of the cells nears "full".

In the EV with EVSE case, the EV's charger would also have to monitor the input AC current, to avoid drawing more current than the EVSE-indicated maximum.

If the input is a lower-than-expected voltage (208v), the charger would usually try to draw more AC current (up to the EVSE max. value) if necessary to charge the battery pack with the "intended" DC current. If the EVSE max. current is reached before the charging DC is high enough, the charger will just need to charge the battery "slower" (less DC current).
See SOC/GID-Meter and CAN-Do Info
2011 LEAF, sold in 2015
2010 Prius, 2014 silver Tesla S
Nissan EVSE, mod to 240/120v 16A
PU: SDG&E
Solar PV: 33 x 225W -> 7 kW max AC
To Sell: X-treme 5000Li EV motorcycle

sparky
Posts: 710
Joined: Fri Apr 23, 2010 10:55 am
Delivery Date: 08 Jan 2011
Location: SoCal

NIssan Bets on the Electric Car - designnews.com

Thu Jun 24, 2010 10:40 am

Nice article talking about the battery breakthroughs and work that Nissan put into battery tech.
"We had a huge number of engineers dedicated to the (battery) project," recalls Shinohara of Nissan. "It was the largest scale engineering focus we've ever had on a single technology, outside of engine design."
The big breakthrough, though, was the energy density. Energy density, which translates directly to driving range, had suddenly jumped two-fold. Nissan still won't say what their energy density is, but experts estimate it to be between 140-150 W-hr/kg, a gigantic leap beyond what was used in earlier EVs.

"An energy density of 150 (W-hr/kg) is a great number," says David Swan, founder of DHS Engineering, which specializes in battery-related research and development. "It's a number we would have given our front teeth for back in the ‘90s."

http://www.designnews.com/article/509514-Nissan_Bets_on_the_Electric_Car.php

Bicster
Posts: 579
Joined: Wed Apr 28, 2010 8:18 am
Delivery Date: 26 Jun 2015
Location: Houston, TX

Re: NIssan Bets on the Electric Car - designnews.com

Thu Jun 24, 2010 1:42 pm

Thanks for sharing that one.
Reserved on April 20, 2010 - Never purchased

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mwalsh
Posts: 9525
Joined: Thu Apr 22, 2010 10:10 am
Delivery Date: 05 Jan 2011
Leaf Number: 0213
Location: Garden Grove, CA

Re: Details on Nissan Leaf battery pack, charge rates, lifespan

Thu Jun 24, 2010 4:48 pm

Some interesting stuff on how Nissan ended up with the batteries they're using in the Leaf:

http://www.designnews.com/article/50951 ... ic_Car.php
2011 Blue Ocean SL with 77,000 miles
2015 pack on 12/30/15
Tinted windows
Bridgestone Ecopia 422+ tires
L1 EVSE upgrade
FIAMM horns
Superbright LED lighting
2013 sun visors
LED shifter
Heated seats
GT-R map lamp lenses
Altima illuminated door switches

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evnow
Moderator
Posts: 11447
Joined: Thu Apr 22, 2010 11:41 am
Delivery Date: 25 Feb 2011
Leaf Number: 303
Location: Seattle, WA

Re: Details on Nissan Leaf battery pack, charge rates, lifespan

Thu Jun 24, 2010 5:25 pm

Merged.
1st Leaf : 2/28/2011 to 5/6/2013
2nd Leaf : 5/4/2013 to 3/21/2017
Volt : 3/25/2017 to 5/25/2018
Model 3 : 5/10/2018 to ?

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