Smiddylad
Posts: 2
Joined: Fri Dec 01, 2017 12:47 am
Delivery Date: 23 Nov 2017
Leaf Number: 027808

Battery Charge of 74% was 13kwh on 24kwh battery

Sun Jan 14, 2018 4:39 am

Hi All
I'm a bit of a newbie here and I have had my leaf around 6 weeks now. I'm finding a few inconsistencies (if that is the right word) with my battery. I have a 2015 model with a 24kwh battery. A couple of days ago my battery was at 26% and I charged it fully to 100% however it only took 13kwh to fully charge my battery. Correct me if I'm wrong but 74% of 24 is 17.76, so it should have taken nearly 18kwh to fully charge my leaf, not 13. So what has happened to the other 5 kwh? It's currently winter here in the UK with temperatures ranging from 1 to 5 degrees Celsius. My battery temp is usually around 4 bars. I know when it is fully charged it usually says I have around 90 miles but 50-60 is the actual miles which is much lower than expected. I am averaging around 4.6 kwh per mile. I don't have leaf spy or anything similar so I don't know what my SOH is? Am I missing something? Is this normal behavior for a Nissan Leaf or do I have a problem with my battery? I'm still learning about my leaf and overall I love it but any help or advice would be helpful.

Many thanks

Neil

WetEV
Posts: 2089
Joined: Fri May 04, 2012 8:25 am
Delivery Date: 16 Feb 2014
Location: Near Seattle, WA

Re: Battery Charge of 74% was 13kwh on 24kwh battery

Sun Jan 14, 2018 5:52 am

Smiddylad wrote:Hi All
I'm a bit of a newbie here and I have had my leaf around 6 weeks now. I'm finding a few inconsistencies (if that is the right word) with my battery. I have a 2015 model with a 24kwh battery. A couple of days ago my battery was at 26% and I charged it fully to 100% however it only took 13kwh to fully charge my battery. Correct me if I'm wrong but 74% of 24 is 17.76, so it should have taken nearly 18kwh to fully charge my leaf, not 13. So what has happened to the other 5 kwh? It's currently winter here in the UK with temperatures ranging from 1 to 5 degrees Celsius. My battery temp is usually around 4 bars. I know when it is fully charged it usually says I have around 90 miles but 50-60 is the actual miles which is much lower than expected. I am averaging around 4.6 kwh per mile. I don't have leaf spy or anything similar so I don't know what my SOH is? Am I missing something? Is this normal behavior for a Nissan Leaf or do I have a problem with my battery? I'm still learning about my leaf and overall I love it but any help or advice would be helpful.

Many thanks

Neil


The battery is about 21kWh usable when new, as some capacity is blocked off to protect the battery at both top and bottom.

Batteries do lose capacity with time and cycles, faster at higher temperatures. What is the history of your Leaf? Did it come to you locally or from a hotter climate? Even in the UK, you are likely down 5% at minimum, so another 1 kWh.

A cold battery stores less energy than a warm battery. That is enough.

Some other factors include denser air so more wind drag, stiffer tires so more rolling loss, charging losses, and so on.

The "No Worries Range" is the distance you can travel without thinking about weather, how old the car is, and staying above low battery warning, etc. This is roughly half of the EPA range of 140 km, less in very cold places, more in warmer places. On a warm day, with modest speeds and careful driving, you can do rather more.
WetEV
#49
Most everything around here is wet during the rainy season. And the rainy season is long.
2012 Leaf SL Red (Totaled)
2014 Leaf SL Red

alozzy
Posts: 1004
Joined: Fri Jan 20, 2017 4:25 pm
Delivery Date: 18 Jan 2017
Location: Vancouver, BC
Contact: Website

Re: Battery Charge of 74% was 13kwh on 24kwh battery

Sun Jan 14, 2018 9:11 pm

Do you still have all 12 capacity bars? Based on your stated charging of 13 kWh to add 74% charge, it sounds like your SOH is around 85%

I would expect you'll drop to 11 bars very soon
Vancouver, CA owner of a 2013 Ocean Blue SV + QC, purchased 01/2017 in WA
Zencar 12/20/24/30A L1/L2 portable EVSE
1-1/4" Curt #11396 hitch
After market, DIY LED DRLs
LeafSpy Pro + Konnwei KW902 ELM327 BT OBDII dongle
Loving my first BEV :D

Smiddylad
Posts: 2
Joined: Fri Dec 01, 2017 12:47 am
Delivery Date: 23 Nov 2017
Leaf Number: 027808

Re: Battery Charge of 74% was 13kwh on 24kwh battery

Tue Jan 16, 2018 9:22 am

Thanks for getting back to me. It’s interesting to know that you lose 3kwh straight way. I was aware that you lose battery efficiency during the winter months but I wasn’t sure if it was a battery issue or the increased use of the climate control, or a factor of the two. In regards to the SOH of my battery I’ve decided to buy a ODM2 so I can use leaf spy that should help me get a better understanding of the state of my battery.

You mention that a cold battery stores less energy than a warm one. Do you know why that is and how many bars on the temperature gauge constitutes a cold battery.

Thanks

Neil

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