I'm not sure that is a good plan.
You may only need 1/3 AH capacity to be able to provide the same cold
cranking amps (CCA) to start up an ICE....but you would need the same
AH capacity to run low amperage 12v accessory circuits.
EV's don't typically need raw CCA (with the possible exception of Plug
in Hybrids), they need a 12v accessory / auxiliary battery.
In some vehicles the HV battery tops off the 12v battery when the car is
off...in that case, you could probably get by with a very little 12v
battery.
However, in others the 12v battery is ONLY charged/topped up when the
car is "turned on" or "plugged in".
So having a lithium with 1/3 the AH rating of a lead acid may mean your
car only has 1/3 of the "parked before dead" time.
Jay
On 4/18/21 8:37 PM, Lawrence Rhodes via EV wrote:
This Canadian has extreme use needs. This video was made for motorcycles but I think
transfers well for EV's. He demonstrates flooded lead, gel, sealed and lithium 12v
starting batteries what we need in our EVs to run the 12v system. Surprisingly the little
lithium does not perform as well as I thought it should and there is a reason. Testing
against the 9 ah motorcycle batteries with 500CCA the lithium had very similar CCA. I was
puzzled. Then the reveal. The "9" ah lithium was in reality a 3ah battery. So
they based their ratings like light bulbs. Going for lumen. In this case what was shown
is you only need a third the capacity in lithium to equal a lead storage battery. When I
size the Leaf 12v battery I am going to look for a battery a third the size in
capacity...maybe even less. Lawrence Rhodes https://youtu.be/3ywopGAXP-I
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
<http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20210419/06e92fbe/attachment.html>
_______________________________________________
Address messages to [email protected]
No other addresses in TO and CC fields
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/
LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
_______________________________________________
Address messages to [email protected]
No other addresses in TO and CC fields
UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub
ARCHIVE: http://www.evdl.org/archive/
LIST INFO: http://lists.evdl.org/listinfo.cgi/ev-evdl.org
