From Electric Vehicle Society.
Two used EVs can have the same mileage—but one battery could be at 95% health while the other is closer to 80%. How can a buyer know the difference?
Zora Chung, Co-Founder and CFO of ReJoule, explains why an EV’s odometer and onboard battery-management system may not reveal the full condition of its most valuable component.
Discover how ReJoule applies electrochemical impedance spectroscopy—or EIS—to assess an EV battery in approximately 10 minutes. Zora also explores how better battery diagnostics could support used-EV buyers, lower repair costs, enable battery remanufacturing and keep healthy batteries in service longer.
Topics include:
• EV battery State of Health
• Used-EV battery testing
• Battery-management systems and their limitations
• ReJoule’s rapid diagnostic technology
• Electrochemical impedance spectroscopy
• EV battery repair and remanufacturing
• NMC and LFP battery recycling
• Battery reuse and second-life energy storage
• Right-to-repair legislation
• Battery passports and diagnostic standards
Whether you own an EV, are considering buying one used or want to understand what happens to EV batteries after their first life, this presentation offers a fascinating look inside the emerging battery-diagnostics and circular-economy industries.
Learn more about ReJoule and its battery-diagnostic technology:
[https://rejouleenergy.com/](https://rejouleenergy.com/)
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CHAPTERS
00:00 Why mileage can’t reveal EV battery health
01:23 Why onboard battery data may fall short
02:30 Traditional EV battery testing
04:32 Reuse, repair, repurpose or recycle
06:49 Why EV batteries are difficult to repair
10:03 NMC versus LFP recycling economics
11:43 How one weak cell affects an entire battery
13:05 ReJoule battery-test demonstration
14:10 Electrochemical impedance spectroscopy explained
16:47 Testing batteries for reuse and second life
18:08 Finding battery imbalance and repair opportunities
19:59 What used-EV buyers should demand
20:46 Right to repair and battery passports
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