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
Busan battery startup 'HEI' accelerates its push into Europe after the U.S.
Busan-based startup HEI has signed a strategic partnership with European impact venture capital firm GIV and distribution partner GISI. Following its earlier agreement with U.S. charging operator Eneridge, HEI is now taking its Biifore battery diagnostics solution into Europe as well.
2025-11-05HEI partners with European VC GIV to advance battery AI diagnostics
EV battery AI diagnostics company HEI has signed a strategic partnership with European impact venture capital firm GIV. HEI will bring its technology — which uses AI to analyze current and voltage data during charging in real time and predict battery degradation, performance loss, and fire risk — to the European market.
HEI courted by both the U.S. and Europe — EV battery AI diagnostics goes global
Korean EV battery AI diagnostics company HEI has secured back-to-back partnerships with U.S.-based Eneridge and European GIV in just one week. With its 'charging as diagnosis' AI technology, HEI is targeting the North American and European markets in parallel.
2025-10-29HEI signs strategic partnership with European VC GIV — targeting global markets with EV battery AI diagnostics
EV battery AI diagnostics company HEI has formalized its European entry by joining forces with European impact venture capital firm GIV, following its earlier partnership with U.S. Eneridge. HEI's core technology uses AI to analyze current and voltage data during charging in real time to predict battery degradation and fire risk.
HEI targets North America and Europe in parallel with 'charging as diagnosis' AI
Korean EV battery AI diagnostics company HEI has entered both North America and Europe in just one week through consecutive partnerships with U.S. Eneridge and European GIV/GISI. HEI is commercializing a Battery-as-a-Service model that diagnoses battery condition through charging alone, with no additional sensors required.
HEI enters the U.S. market through a battery diagnostics partnership with Eneridge
AI-powered battery diagnostics company HEI has signed an official partnership with U.S. EV charging operator Eneridge. Drivers can check battery state of health, performance, and remaining useful life in real time while charging — with no additional equipment or sensors required.
2025-10-24HEI wins top mobility innovation prize and Minister's Award for EV battery diagnostics
On the 21st, HEI (co-CEOs Eunseok Lee and Hyunmin Park) was awarded both the Future Mobility Grand Innovation Prize at the FIX Innovation Awards and the Minister of Land, Infrastructure and Transport Award, recognizing its technology leadership.
2024-10-24A new management system to prevent electric two-wheeler battery fires
On the 18th, a memorandum of understanding was signed at HEI's Seoul office between leading domestic electric two-wheeler operator Zentropy and battery diagnostics company HEI.
2024-10-22Nationwide charger-fire prevention and EV battery diagnostics service now available
On the 27th, a business agreement was signed between fast-charging operator Chaevi and battery diagnostics company HEI.
2024-06-28HEI teams up with LS E-Link to raise safety through battery diagnostics integration
EV battery diagnostics company HEI Corporation announced that it has signed a memorandum of understanding (MOU) with LS E-Link on the 23rd.
2024-01-24HEI signs MOU with Canadian charger manufacturer Foreseeson
EV battery diagnostics company HEI Corporation has signed a memorandum of understanding (MOU) with Foreseeson, a Canadian developer and manufacturer of EV charging products, on the 11th (local U.S. time).
2024-01-15EV batteries can now be diagnosed automatically just by charging
Busan startup HEI launches Biifore. Its ease of use — independent of vehicle model and manufacturer — is a standout strength, with promising extensibility to the used-car and rental-fleet markets.
2023-11-05HEI launches its EV battery diagnostics solution 'Biifore'
EV battery management and evaluation platform HEI announced the launch of its EV battery diagnostics solution 'Biifore'.
2023-10-25New safety features, including EV fire prevention, raise charger safety
Starkoff is jointly supporting a proof-of-concept service with HEI, a company specializing in EV battery condition diagnostics.
2023-08-30
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