How we started
Beyond the limits of hardware,
we open the future of batteries through data
While researching batteries in the U.S. and working with diagnostic technologies used by global manufacturers, one question stayed with me. Why should understanding battery condition always require expensive equipment, long testing cycles, and so much cost? I wanted to keep the reliability of statistical diagnostics and the accuracy of manufacturer-grade engineering, while removing the time and cost burden imposed by hardware.
That is why I started HEI.
Proving battery value through data and algorithms alone, without hardware, that is the answer I found as a battery expert and the mission of HEI.

Eunseok Lee
CEOB.S. in Mechanical Engineering, Seoul National University
M.S. and Ph.D. in Mechanical Engineering with a Physics minor, Stanford University
Postdoctoral researcher, Next-Generation Battery Lab, Lawrence Berkeley National Laboratory
Assistant Professor, The University of Alabama in Huntsville
Senior Scientist, Mercedes-Benz R&D North America (MBRDNA)
Published 15+ papers on battery electrode materials,
interfaces, ion transport, degradation,
and nanoparticles.
Specialized in computational physics and data science,
including quantum chemistry, ML, and quantum computing.
More than 1,600 citations with an h-index of 13.
Two papers have each been cited 200+ times
(Nano Letters 2012;
Adv. Energy Mater. 2014).
Awarded U.S. NSF research funding.
Led next-generation battery R&D at Mercedes-Benz,
including technology internalization and production integration.
Also collaborated with Google, IBM, and PsiQuantum
on quantum-computing research for automakers.
Holds U.S. Patent 11,824,199 from MBRDNA
(metal-halide cathode; assignee:
Mercedes-Benz + IBM).
HEI has registered three patents in Korea and the U.S.,
with two additional applications pending.
Our journey
2024. 11
PartnershipDeveloped Meritz Fire insurance product
- Professional liability insurance (bundled with EV battery diagnostics)
2024. 10
AwardFIX 2024 Innovation Award (Minister of Land, Infrastructure and Transport Award)
FlyAsia Energy Tech category winner
KIC-DC Tech Launch Program Key Performance Award
2024. 09
PartnershipNationwide service launch with Chaevi
- Launched nationwide service across Korea
2024. 05
Branch openedOpened San Jose, USA office
2024. 01
PartnershipBattery diagnostics for LS E-Link (SK Group) electric buses
- Battery diagnostics service for EV fleet operators
2023. 06
Beta testClosed beta test
- Starkoff PoC (COEX, Gangnam, Seoul) - TURU Charger PoC (Jeju)
2021. 09
FoundedCompany founded
News
News & Insights

Korean Intellectual Property Office
Battery SOH estimation system,
and the parameter-extraction system & method
2023, 2024

Future Innovation Tech Expo (FIX 2024)
FIX 2024 Grand Innovation Award
(Minister of Land, Infrastructure and Transport)
2024

FLY ASIA
Winner, Energy Tech category
2024






