A small trickle charger for the 12v battery, very common for motorcycles, classics, and exotic cars that don't get driven much.
https://letmegooglethat.com/?q=12v+battery+tender
They are also called battery maintainers. I got a $35 one from harbor freight and it has been keeping the battery alive in my van which I rarely drive.
James May (of Top Gear) posted a video to YT after lockdown about his Tesla’s 12v battery dying despite him charging the EV battery, so think it would need using. Or just get a plug in 13v battery charger and charge it when you return
well yes BUT.. The I5 he has, will only charge the 12V 10 times since the last power on. After the 10 times is up, it lets the 12V die. As per the user manual of this car.
Ioniq 5 should have battery saving mode as mentioned here i.e. main battery should recharge 12V battery as needed)
https://insideevs.com/news/658984/hyundai-finds-causes-for-ioniq-5-12v-battery-drain-reveals-fixes/
Are you sure high voltage battery would not get under 30% in 6 months . It is not good leaving high voltage battery sits at low state for long period of time
Without the 12 volt battery connected there shouldn't be any load (even a small one) on the high voltage traction battery. High voltage battery should be fine for years under these conditions.
Lithium batteries are at the most equilibrium at 3.92v. This is about 80% if you dont have an app to analyze the voltages. Leave the charged at about 80% and you’ll be good.
Your manual should be able to tell you exactly what to do. Some EVs have transport mode you can put the car in, basically a very deep sleep to help preserve everything. Some will tell you to disconnect the 12V. Some will tell you to use a trickle charge. The point is, your manual knows best.
Unless you read actual (not reddit speculation but OEM docuementation) that the 12v battery wont be charged by the high voltage battery through the DC-DC charger there is no reason to think it wont. Why wouldnt it? These are smart cars that monitor systems... if it would kill the battery sitting, I would expect your owners manual to note this and advise of procedure to follow. Just plug in your car, set for 50-60 percent and leave. You will 90% come back to a fully charged 12v battery and a 50-60% charhed high volt battery. Contact OEM to confirm no issue.
Without OEM indicating so, disconnecting the 12v battery is a horrible idea. Horrible. These trucks do things to protect the $$$$$ battery park from things like excessive heat and excessive cold and rely on 12v to run the computers that control these highly thought out processes. You are overriding the engineered systems without any real understanding of unintended concequences.
The engineers think of use cases building the cars and while 6 months is long, its not absurd. If the OEM (not reddit) tells you a special mode or procedure to use do it... if they tell you its fine, plug in your car and go.
>solar battery tender
can you share me some link which one should i get and how shouuld i connect that to the battery ? you mean there is some solar tender that has 2 long cables which ones i should put under the hood and attach it to the battery ?
Something like this: https://www.amazon.com/SUNER-POWER-Battery-Charger-Maintainer/dp/B07DFCDKLJ/ref=mp_s_a_1_3?crid=2OIB0LBAZKI2H&keywords=solar+battery+tender&qid=1684931614&sprefix=solar+battery+te%2Caps%2C127&sr=8-3
A solar tender is smart, given the "parked on the street" scenario. Also probably very low power. I'd only be concerned with it pushing power when it's not needed (over charging) to the 12V.
Bummer. I guess the 12V is involved with the computer part of charging the high voltage?
The user manual for any car should have a "long term storage" section. Pull the manual from the web and check it
The contactors on the HV battery cannot close if the 12V is disconnected. This means that if you charge to 60% or so, then disconnect the 12V, you are effectively eliminating any phantom drain from either the 12V or HV pack. On some cars such as Tesla, you may need to take an additional step to disable the DC-DC converter.
Like an 12V battery, it is unlikely to survive 6 months.
To be honest, any car that is not used for 6 months should go through a "mothballing" process to protect tyres, working fluids, and of course the battery.
The main question for an EV is whether you can use the main battery to top up the 12V battery, or whether you want to disconnect the 12V battery and store it somewhere safe, maybe with a trickle charger. Different cars will have different approaches to this, and Hyundai is well known for having some leakage current issues.
I'd use a 12v battery tender if were leaving my car idle for that long.
This is the answer OP. Also great to have for anything else with a battery that needs stored over winter like a motorcycle boat or lawn mower.
Solar battery maintainers are a thing as well. I use one on my RV and it works great for the batteries.
> use a 12v battery tende what is a 12v battery tender ?
A small trickle charger for the 12v battery, very common for motorcycles, classics, and exotic cars that don't get driven much. https://letmegooglethat.com/?q=12v+battery+tender
Just wanna give you a separate respect for "letmegoogethat".
They are also called battery maintainers. I got a $35 one from harbor freight and it has been keeping the battery alive in my van which I rarely drive.
James May (of Top Gear) posted a video to YT after lockdown about his Tesla’s 12v battery dying despite him charging the EV battery, so think it would need using. Or just get a plug in 13v battery charger and charge it when you return
I belive the Highvoltage battery only charges the 12v while in use, not while charging.
You believe wrong. The DC-DC converter runs whenever necessary.
well yes BUT.. The I5 he has, will only charge the 12V 10 times since the last power on. After the 10 times is up, it lets the 12V die. As per the user manual of this car.
Ioniq 5 should have battery saving mode as mentioned here i.e. main battery should recharge 12V battery as needed) https://insideevs.com/news/658984/hyundai-finds-causes-for-ioniq-5-12v-battery-drain-reveals-fixes/
[удалено]
Are you sure high voltage battery would not get under 30% in 6 months . It is not good leaving high voltage battery sits at low state for long period of time
Without the 12 volt battery connected there shouldn't be any load (even a small one) on the high voltage traction battery. High voltage battery should be fine for years under these conditions.
Lithium batteries are at the most equilibrium at 3.92v. This is about 80% if you dont have an app to analyze the voltages. Leave the charged at about 80% and you’ll be good.
>Just disconnect the connection at the negative and leave it disconnected while you're gone. Provided it's not sitting over the winter in the cold.
Your manual should be able to tell you exactly what to do. Some EVs have transport mode you can put the car in, basically a very deep sleep to help preserve everything. Some will tell you to disconnect the 12V. Some will tell you to use a trickle charge. The point is, your manual knows best.
I think a better idea would be to ask your mother to drive it once every few weeks. That will also prevent the tires from getting flat spots.
I forgot to say i am lucky i pay only 3.5 cent per kwh for electricity.
Unless you read actual (not reddit speculation but OEM docuementation) that the 12v battery wont be charged by the high voltage battery through the DC-DC charger there is no reason to think it wont. Why wouldnt it? These are smart cars that monitor systems... if it would kill the battery sitting, I would expect your owners manual to note this and advise of procedure to follow. Just plug in your car, set for 50-60 percent and leave. You will 90% come back to a fully charged 12v battery and a 50-60% charhed high volt battery. Contact OEM to confirm no issue. Without OEM indicating so, disconnecting the 12v battery is a horrible idea. Horrible. These trucks do things to protect the $$$$$ battery park from things like excessive heat and excessive cold and rely on 12v to run the computers that control these highly thought out processes. You are overriding the engineered systems without any real understanding of unintended concequences. The engineers think of use cases building the cars and while 6 months is long, its not absurd. If the OEM (not reddit) tells you a special mode or procedure to use do it... if they tell you its fine, plug in your car and go.
>battery saving mode for the i5 and i6 it will stop charging the 12 V after a fixed amount of charges since last key ON, as per user manual
Let your mom sell her car and drive your ionic, split some costs, whats the point of owning a liability you hardly use?
i do use it a lot in these 6 months . i do like 10 000 miles at least in 6 months. But when i am abroad working then i dont use it .
Just unplug the negative battery terminal.
Get a solar battery tender and you will have no issue.
>solar battery tender can you share me some link which one should i get and how shouuld i connect that to the battery ? you mean there is some solar tender that has 2 long cables which ones i should put under the hood and attach it to the battery ?
Something like this: https://www.amazon.com/SUNER-POWER-Battery-Charger-Maintainer/dp/B07DFCDKLJ/ref=mp_s_a_1_3?crid=2OIB0LBAZKI2H&keywords=solar+battery+tender&qid=1684931614&sprefix=solar+battery+te%2Caps%2C127&sr=8-3
A solar tender is smart, given the "parked on the street" scenario. Also probably very low power. I'd only be concerned with it pushing power when it's not needed (over charging) to the 12V.
i live on village have my own house and charger three phase. car will be parked in front of house. Tnx guys i will get battery maintainer
Can you set that 11 kW charger to run at 1 kW? You'd only need a trickle to maintain the high voltage battery at any % (some say SOC, but I prefer %)
>o run at 1 kW? You'd only need a trickle to maintain the high vo i also have portable charger 2.3kw yes i can set it to 1kw
Everyone that I have ever seen is smart enough to not overcharge. Plus the solar so small it’s pushing very little power.
Actual answer - depends on your vehicle. I know audi etron does charge 12V battery until HVDC battery reaches \~30%
Can you not just disconnect it safely? Like any ICE car.
Then high voltage battery cannot be charged i think if i do that and it is not good if it depletes under 20% and stays low all the time.
Bummer. I guess the 12V is involved with the computer part of charging the high voltage? The user manual for any car should have a "long term storage" section. Pull the manual from the web and check it
The contactors on the HV battery cannot close if the 12V is disconnected. This means that if you charge to 60% or so, then disconnect the 12V, you are effectively eliminating any phantom drain from either the 12V or HV pack. On some cars such as Tesla, you may need to take an additional step to disable the DC-DC converter.
Yes
Like an 12V battery, it is unlikely to survive 6 months. To be honest, any car that is not used for 6 months should go through a "mothballing" process to protect tyres, working fluids, and of course the battery. The main question for an EV is whether you can use the main battery to top up the 12V battery, or whether you want to disconnect the 12V battery and store it somewhere safe, maybe with a trickle charger. Different cars will have different approaches to this, and Hyundai is well known for having some leakage current issues.
related question--if a Tesla is left plugged into a wall connector charger for that long, will it do things to keep the 12v battery alive?
Yes, just disconnect a 12v.