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Battery health check

Kia EV3 / EV9 battery health check

How to read the high voltage battery of the Kia EV3 / EV9 with the BattGrade app: the adapter for your phone, where the port is, how the test runs and what the certificate shows.

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What you need

The adapter for your phone

Any one of these Bluetooth OBD2 adapters reads the Kia EV3 / EV9. Choose one that works with your phone.

AdapterWorks with
OBDLink MX+Android · iPhone support coming
OBDLink CXiPhone and Android
Vgate vLinker FSAndroid · not yet on iPhone

Hyundai, Kia and Genesis cars need neither 29-bit CAN nor custom flow control, so good ELM327 adapters such as the Vgate vLinker FS read them too.

Compare all adapters
Port location
Under the steering wheel
Cable
None, standard OBD2 port
The test

How the test runs on the Kia EV3 / EV9

A few minutes with the car switched on. The app only reads data: nothing is written to the car.

Before you start

Put the car in READY mode, not only with the ignition on, before you start the test.

  1. 01

    Wake the car

    The car must be awake, with the ignition on or in READY mode depending on the model. A sleeping car returns no battery data.

  2. 02

    Plug in and pair

    Plug the adapter into the OBD2 port and pair it with the BattGrade app over Bluetooth.

  3. 03

    Read the battery

    The app identifies the car from its VIN and reads the battery management system with read-only requests. Every request and response is kept with the test as raw data.

  4. 04

    Get the result

    BattGrade's server recomputes the result from the raw data, and the certificate is issued from the server's result, signed, with a QR code anyone can check.

State of Health

How the SoH of the Kia EV3 / EV9 is measured

The app can use these methods on the Kia EV3 / EV9, in order of preference. The certificate names the method used and gives an uncertainty band in points either side of the score.

  1. 1

    Energy-based

    First choice

    The full-charge energy estimated from BMS data, divided by the usable energy of the same variant when new. Used only when the state of charge and the pack temperature allow a reliable estimate.

  2. 2

    BMS-reported

    The SoH value reported by the battery management system, used as it is.

Validation

Where validation stands

Validation in progress

The app reads the Kia EV3 / EV9 today, and validation on real cars is in progress. This page will show when it is complete.

Either way, BattGrade's server recomputes every result from the raw data read from the car, and each certificate names its method and uncertainty band.

Read the methodology
The certificate

What the certificate shows

A certificate for the Kia EV3 / EV9 carries the same fields as the sample, filled in with the car's own data.

  • The State of Health (SoH), with the method behind it and an uncertainty band
  • A grade from A to F, on the same bands for every make
  • Warning signs, wherever the car provides the data
  • The name of the inspector who ran the test
  • Valid for 6 months from the day it is issued
See a sample certificate Download a sample certificate (PDF)
How to read a certificateRead the methodology

Related models

Other Hyundai, Kia and Genesis cars the app reads today.

See all readable models

Questions about the Kia EV3 / EV9

Any one of these: OBDLink MX+, OBDLink CX or Vgate vLinker FS. On iPhone, use OBDLink CX.
Under the steering wheel. No extra cable is needed: the adapter plugs straight into the standard OBD2 port.
The app can use these methods, in order of preference: Energy-based, BMS-reported. The certificate names the method used and gives an uncertainty band.
Yes. The app reads the Kia EV3 / EV9 today, and validation on real cars is in progress.
A few minutes, with the car switched on. The app only reads data and writes nothing to the car.

Test Kia EV3 / EV9 batteries with BattGrade.

The Android app is in testing and the iPhone version comes next. Join early access and we will get you started.

Get early access See all readable models