jray3
Posts: 1516
Joined: Tue Dec 06, 2011 1:05 am
Location: Tacoma area, WA
Contact: Website

12V battery BCI Size?

Tue May 22, 2018 3:57 pm

I thought that I'd seen this posted, but searches revealed nothing. Anybody know the BCI group number offhand?
2012 i-SE "MR BEAN" 90,000 miles
2000 Mazda Miata EV, 78 kW, 17 kWh
1983 Grumman Kurbwatt EV,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

Don
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Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: 12V battery BCI Size?

Tue May 22, 2018 4:54 pm

A Google search says it's a 151R - viewtopic.php?t=2789

I bought a Miata AGM battery because I was familiar ith them, they're AGM and it was cheaper than the flooded replacement. Installed it in one of the cars about 2 years ago. It's not as tall as the OE battery, but I cut a piece of 2 X 6 the size of the battery to sit it on and it installed with the factory hold down clamps - Quick and easy install

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2017 Chevy Volt Premier
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1979 Honda CBX six into six

jray3
Posts: 1516
Joined: Tue Dec 06, 2011 1:05 am
Location: Tacoma area, WA
Contact: Website

Re: 12V battery BCI Size?

Tue May 22, 2018 5:26 pm

THX Don- My dad dutifully disconnected mom's original i-MiEV battery before putting the car into hibernation for 4 months, but without a 12V float it self-discharged down to 4 volts!
2012 i-SE "MR BEAN" 90,000 miles
2000 Mazda Miata EV, 78 kW, 17 kWh
1983 Grumman Kurbwatt EV,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

Don
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Posts: 2704
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: 12V battery BCI Size?

Wed May 23, 2018 7:01 am

Same thing happened to us - The car was stored for about 6 months without a trickle charger and the OE battery was toast. The other car, driven regularly still has the 6 year old OE battery going strong. If you plan to store an older car for a month or more, a maintenance charger is a must

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2017 Chevy Volt Premier
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1979 Honda CBX six into six

wmcbrine
Posts: 350
Joined: Wed Apr 29, 2015 10:26 am
Location: Laurel, MD
Contact: Website

Re: 12V battery BCI Size?

Fri May 25, 2018 8:15 am

Don wrote:A Google search says it's a 151R - viewtopic.php?t=2789

I can add that a regular 151R is a perfect fit -- no boards needed. :)

Don
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Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: 12V battery BCI Size?

Fri May 25, 2018 10:19 am

. . . . but a flooded lead acid battery in a lithium powered car just seems so . . . . Twentieth Century :lol:

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2017 Chevy Volt Premier
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1979 Honda CBX six into six

ed5000
Posts: 138
Joined: Mon Jul 27, 2015 9:22 pm
Location: Castro Valley, CA

Re: 12V battery BCI Size?

Fri May 25, 2018 10:50 am

Don wrote:. . . . but a flooded lead acid battery in a lithium powered car just seems so . . . . Twentieth Century :lol:

Don

That would be great if they could find a dc to dc converter robust enough to power all the controls and accessories without a lead acid battery. Obviously it would have to be powered up from the traction battery 24/7.
2012 ES, Cool Metalic Silver, no quick charge, no fog lights and no navi but a cold weather package for when it gets 13 below, wait - it never gets that cold here.
"Silver Shadow"

JoeS
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Joined: Thu Dec 15, 2011 5:47 am
Location: Los Altos Hills, California

Re: 12V battery BCI Size?

Fri May 25, 2018 12:16 pm

Check out this Headway LiFePO4 i-MiEV 12v battery from September 2012 -

http://myimiev.com/forum/viewtopic.php?f=9&t=694&p=4035&hilit=Headway#p4035
EVs: 2 Wht/Blu SE Prem., '13 Tesla MS85, 3 156v CorbinSparrows (2 Li-ion), 24v EcoScoot(LiFePO4)
EV Conv: 156v '86 Ram PU, 144v '65 Saab 96
Hybrids: 48v1kW bike
ICE: '88 Isuzu Trooper. Mothballed: '67 Saab (orig.owner), '76 MBZ L206D RHD RV

Don
Site Moderator
Posts: 2704
Joined: Thu May 10, 2012 3:55 pm
Location: Biloxi MS

Re: 12V battery BCI Size?

Fri May 25, 2018 1:03 pm

ed5000 wrote:That would be great if they could find a dc to dc converter robust enough to power all the controls and accessories without a lead acid battery. Obviously it would have to be powered up from the traction battery 24/7.
In actuality, that's exactly what's happening - Nothing 'runs off the 12 volt battery' while you're driving the car. It's just there to get it started. The DC to DC converter is quite robust (capable of 70 amps output, IIRC) and it can and does power every 12 volt accessory with plenty left over to recharge the 12 volt battery if it's ever in need of a charge

Don
2012 iMiEV SE Premium, White
2012 iMiEV SE, White
2017 Chevy Volt Premier
2014 Ford Transit Connect XLT SWB wagon, 14,000 miles
1979 Honda CBX six into six

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