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ARTICLE · 19 JULY 2024

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How Can EV OBD Regulations Support The Transportation Revolution?

Exponent
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In an electric vehicle, the main powertrain components include the battery system, power management system, inverter/converter, onboard charging system

United StatesEnergy and Natural Resources
Exponent
Exponent

In an electric vehicle, the main powertrain components include the battery system, power management system, inverter/converter, onboard charging system, drive system, and regenerative braking system. Because there are no tailpipe emissions, EVs have historically been excluded from formal California Air Resources Board (CARB) onboard diagnostic (OBD) regulations; however, this will likely change as the number of EVs on the road increases. In November 2023, CARB announced a road map for setting OBD requirements for EVs.

THE CHALLENGE

Battery and battery system technologies (e.g., battery chemistries, diagnostic sensors, control algorithms, pack configurations, etc.) are evolving rapidly to facilitate efficient and rapid electrification of the transportation sector. As technological advancements accelerate, the automotive industry must continually develop and improve upon methods to assess the impact of battery utilization on performance and safety across the

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