Why doesn't it run everything from the main battery pack to begin with and forego the 12V battery altogether.
Well Joe, when you're counting every mile that you can squeeze out of a battery pack, all of the sudden running accessories starts to make a difference. Same reason that ICE cars converted to electric power steering years ago to reduce draw and fuel consumption.
I'd generally agree with you when it comes to legacy manufacturers....but Tesla use a standard 12v battery too.
when it is drained for some reason...V2L is 240 volt.As a lot of eletrical items come of the shelf for 12V, so this is logic to use 12V. But that would not require a second battery. But is also from a safety perspective.
When you stop the car a relay disconnects the 800v battery from all other electric systems (except charger components) meaning that all electric devices no longer have a connection with the Battery.
But you would still like to be able to turn on the car (Activate the relay), get inside the car using remote. This requires power that is seperate from the big battery which requires a battery or other energy storage device. Where 12v battery is the most common (cheap) one and then it's also cheap to connect standard car components on the low voltage network..
I would be surprised if this lasts for another decade when BEV become the standard over ICE..
Not sure why they not keep the battery charged constanlty when it's driving and you hear (not EV6 specific) that these batteries run out of power.
Not sure if V2L depends on the 12v battery, it would be funny to enable the use V2L to charge the 12V battery
The power to keep the 12v battery charged has to come from somewhere. 😉
The main draw on range comes from the HVAC. The LED lighting and stereo are small items that literally might cost you a mile or two over a full charge.
I’m going to guess that Kia wants to use already engineered off the shelf parts from their ICE cars, or hybrids to save costs. I could be wrong but EV6 is new but not 100% in all parts.
We've had this discussion on this forum before, there are several reasons.
That's a bad guess. It has nothing to do with using existing parts. The first issue here is that there are way too many new ev owners that still have ice on the brain and haven’t taken the time to learn. You want a buffer between an 800v battery and all of your 12v accessories and that is what the 12v battery is. With ice vehicles you needed lots of cold cranking amps for starting, not needed on an ev. They don't get constantly charged like an ice vehicle, no need on an ev. So they're using calcium lead acid which has different characteristics from a standard lead acid. You'll all to well to read up on these to better understand what Kia is doing instead of guessing what it's not doing.
That's interesting, do you have any more details? When I search for the battery number in my EV6, it appears to be the same one they've been using in basic Kia/Hyundai ICE vehicles (Elantra, Forte, etc) for the past decade.
The manual tells you what type of battery it has.
Page 8-18.
Ah, ok, that just says it uses a "maintenance-free calcium-based battery". But I think that's somewhat redundant. Maintenance free batteries (which are what most cars have used for a long time) include calcium to reduce the water consumption. Batteries that just supplement the lead with antimony consume more water, and need to be checked/filled. Nothing there suggests this is any different than typical automotive batteries used today.
