Commencement of Demonstration Experiment for EV Battery Life Prediction Diagnosis

News Release

KD e Solutions Inc.

Denchi Corporation

HKS Co., Ltd.

June 29, 2026

KD e Solutions Inc. (hereinafter "KDES") has enabled highly accurate prediction of EV battery lifespan using a new approach that combines "actual measured EV battery data" obtained via the electrochemical impedance method (*1) owned by Denchi Corporation (hereinafter "Denchi"), with "vehicle data" collected by devices developed by HKS Co., Ltd. (hereinafter "HKS"). This enables visualization of battery value, clarifying the optimal timing for vehicle replacement or secondary battery use (*2), thereby accelerating the circular economy (*3) from battery production to disposal.

*1 A method that sends a continuously frequency-variable small signal directly into an EV battery via the charging port and analyzes the response signal to predict degradation.

*2 Initiatives that repurpose lithium-ion batteries after automotive use by leveraging their remaining performance for alternative applications.

*3 An economic system that continuously generates added value in a sustainable manner by circulating resources and minimizing waste.

[Features]

EV battery life prediction completed in just 5 minutes! New smartphone-linked system allows immediate confirmation of diagnosis results

Visualization of differences between predicted vehicle lifespan under usage conditions and standard lifespan

Detailed analysis of diagnosis results using two data streams: actual battery measurements and onboard vehicle data

Diagnosis results presented with easy-to-understand graphs and clear commentary

Planned addition of EV battery fire risk prediction diagnosis (demonstration experiment scheduled to begin autumn 2026)

Demonstration experiment period: July 2026 – March 2027

・Lifespan prediction diagnosis to begin at 3 KDES-owned facilities (Osaka, Sakai, Kyoto) (scheduled for July)

・Expansion of target vehicle models (scheduled for October)

Demonstration experiment content: Expansion of target EV models (Nissan Leaf 1st generation, Sakura) and continuous improvement of diagnostic accuracy

Roles of each company

・KDES: Continuous data collection using end-of-lease EVs and commercialization

・Denchi: Development of battery lifespan prediction and diagnosis algorithms

・HKS: Development of devices that collect vehicle data required for battery lifespan prediction diagnosis

Data Flow: 1 Battery measurement via Denchi device and transmission to smartphone

2 Collection of onboard vehicle data via HKS device and transmission to smartphone

3 Transmission of data to Denchi server via smartphone app

4 Matching and analysis of both data sets on the server

5 Confirmation of battery lifespan prediction diagnosis results via app

About KDES

Since 1959, KDES has operated as an automotive maintenance service provider, servicing a wide range of vehicles including specialized vehicles that support infrastructure.

The company has been actively involved in EVs for many years, participating in the Shikoku EV Rally in 1999 with a self-developed vehicle and accumulating technical expertise. Today, through proactive investment in next-generation automotive technologies, KDES is well-prepared to meet emerging demands associated with EV adoption.

KDES also actively promotes automotive leasing services, offering optimal leasing plans for both corporate and individual customers. Through flexible contracts tailored to customer needs, the company handles vehicle procurement, maintenance, and servicing.

Additionally, KDES provides comprehensive support for EV adoption, including EV charger installation, to help improve operational efficiency.

Prioritizing solutions to customer concerns such as vehicle breakdowns and EV battery anxiety, KDES contributes to local communities through its maintenance and leasing operations. As a member of the Sumitomo Mitsui Auto Service Group, the company is focused on delivering comprehensive EV solutions and aims to become a business that helps realize a sustainable society.

About Denchi

Denchi Corporation is a deep-tech company specializing in non-destructive battery diagnostics using the electrochemical impedance spectroscopy (EIS) method. The company possesses proprietary technology that "measures" internal battery degradation states without disassembling the cell, by analyzing the response to a small signal transmitted through the charging port. In this demonstration experiment, Denchi is responsible for developing battery lifespan prediction algorithms based on these actual measurement data. Beyond EVs, Denchi aims to apply its diagnostic technology to a wide range of applications using lithium-ion batteries—including power tools, electric bicycles, and stationary energy storage systems (BESS)—contributing to optimized secondary use and reuse, and ultimately to the realization of a resource-circulating society through battery value visualization.

【Inquiries regarding this matter】

KD e Solutions Inc. EV Strategy Promotion Office

URL: https://www.kdes.co.jp/ e-mail: [email protected]

Denchi Corporation

URL: https://denchi.ai/ e-mail: [email protected]