Niro PHEV Charging noises/behavior for new owners - Kia Niro Forum
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post #1 of 4 (permalink) Old 08-09-2019, 06:30 PM Thread Starter
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Niro PHEV Charging noises/behavior for new owners

We have owned our 2019 NIRO PHEV for 3 months now. We live in the Southeast United States where it gets very hot and humid.
Our Niro is housed in a garage and on a 100 degree day with high relative humidity you can imagine what it is like in a garage where the Level 2 charger is that charges the vehicle.

I trust the battery management system on these cars and have no issues plugging it in to charge no matter what the situation. That is why I bought it, to run it on electric as much as possible.

As a new owner you may hear some noises from your vehicle when it is charging and this can be concerning if you don't know what the sounds are and why they are occurring .
Noise 1- you may go out in the garage and hear a low hum coming from the engine compartment after the car has been charging for awhile- this is the electric water pump circulating water to cool the components down.
Noise 2- you may hear a louder noise which is the electric radiator fan coming on to dissipate the heat in the fluid the electric water pump is circulating to help cool down the components.

I have come out in the garage a couple of hours after plugging in and wondering if I had left the car running and then after finding it was off wondering what in the world these noises were coming from in the car!

I investigated the noises, the service and owners manuals to discover the sources and reasons for them to be occurring. I thought it might be helpful to someone else to post what I had found.

I appreciate the engineering that KIA put in the battery management system, it makes me feel confident plugging in every chance I get.
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Last edited by Johnxyz; 08-09-2019 at 06:36 PM.
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post #2 of 4 (permalink) Old 08-09-2019, 08:25 PM
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Then there's Nissan that didn't add any battery cooling other than air, and having major issues in the warmer areas.

Nice write-up!

Dan
2019 Kia Niro PHEV EX Premium

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post #3 of 4 (permalink) Old 08-15-2019, 11:27 AM
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The cooling fan underneath the rear seats also turns on while charging. I haven't confirmed if it turns on after charging has completed.

Paul
2019 Kia Niro PHEV EX Premium Silky Silver
2016 Mazda CX-5 GT Soul Red

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post #4 of 4 (permalink) Old 08-15-2019, 11:29 AM
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Quote:
Originally Posted by atc98092 View Post
Then there's Nissan that didn't add any battery cooling other than air, and having major issues in the warmer areas.

Nice write-up!
So that's why the J1772 standard includes a ventilation required signal!

https://en.wikipedia.org/wiki/SAE_J1772#Signaling

Jim
Southern Maryland
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