ReJoule

ReJoule is a U.S.-based technology company specializing in advanced battery diagnostics and analytics. Serving the EV, energy storage, and recycling sectors, ReJoule develops non-destructive testing systems that assess the state-of-health (SOH) and performance of lithium-ion batteries. Their solutions enable faster, safer, and more data-driven decision-making across the battery manufacturing, reuse, and recycling value chain.

ReJoule engineers modular diagnostic platforms that combine Electrochemical Impedance Spectroscopy (EIS) and Direct Current Internal Resistance (DCIR) to evaluate batteries from cell to vehicle level. The BattScan family—including cell, module, pack, and vehicle testers—delivers rapid SOH estimation, fault detection, and standardized reporting through the BatteryDB cloud platform. This integration allows users to manage diagnostic data with full traceability and leverage machine learning models built on historical test results.

A core strength of ReJoule’s technology is its ability to test unknown or mixed batteries quickly, building reference models for future reuse or remanufacturing workflows. The company’s systems bridge end-of-line validation in manufacturing with second-life qualification in recycling, forming a diagnostic link across the entire battery lifecycle.

ReJoule provides a full scope of services:

• System Development – Designing and producing diagnostic systems for cell, module, pack, and vehicle applications.
• Testing & Characterization – Offering in-house diagnostic services and data model development for new battery types.
• Integration & Software – Connecting measurement systems with BatteryDB for automated analytics, traceability, and data export.
• Training & Support – Assisting customers with workflow design, calibration, and best practices for unknown or second-life batteries.
• Research & Collaboration – Partnering with DOE initiatives and circular economy projects to advance diagnostic standards.

ReJoule’s mission is to enable smarter, circular battery management—helping manufacturers, recyclers, and fleet operators extract maximum value, safety, and longevity from every battery.