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J.D. Power: public charging issues may short-circuit EV growth; Volta, Tesla Supercharger rank highest in respective segments

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Power 2023 US Electric Vehicle Experience (EVX) Public Charging Study. Despite the increase in public charging stations across the United States, customer satisfaction with public Level 2 charging has declined to 617 (on a 1,000-point scale), 16 points lower than a year ago and the lowest level since the study began in 2021.

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J.D. Power survey finds public charging experience for EV owners has a lot of room for improvement

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Power US Electric Vehicle Experience (EVX) Public Charging Study measures EV owners’ satisfaction with two types of public charge point operators: Level 2 charging stations and DC fast charger stations. However, satisfaction with DC fast charger availability is 720 while Level 2 charging station availability drops to 645.

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Tesla chargers rank highest in EV charging network customer satisfaction study

Teslarati

Tesla Destination chargers and the Tesla Supercharger Network have ranked the highest in JD Power’s inaugural US Electric Vehicle Experience (EVX) Public Charging Study. Tesla’s Supercharger Network ranked the highest among DC fast chargers, scoring 733 points. Read JD Power’s study below!

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DOE releases two Co-Optima studies; high-octane blendstocks, engine efficiency merit function

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The US Department of Energy (DOE) has released two studies from the Co-Optimization of Engines & Fuels initiative ( Co-Optima ) ( earlier post ). The new report describes the process and interim results of this study. Department of Energy, Washington, DC. Department of Energy, Washington, DC. Blendstocks. Miles, Paul.

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SwRI develops device to test friction, wear associated with EV fluids

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Frazier, research engineer with SwRI’s Advanced Drivetrain Lubricants Section Tribology is the study of friction, lubrication, and wear. An inverter takes the direct current (DC) voltage input from the batteries and converts it to the AC power required to operate the vehicle’s motor. That extends to tribology testing as well.

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Volkswagen presents status of fleet study in electromobility; latest generation of twĂŻnDRIVE plug-in hybrid

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Volkswagen study Golf Variant twïnDRIVE. Volkswagen, in cooperation with 6 project partners and the German Ministry of the Environment, presented in Berlin the current status of the “Fleet study in electric mobility” that was initiated in July 2008. The plug-in hybrid, according to Prof. Click to enlarge. Earlier post.)

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A123: Increasing 48V battery power up to ~25 kW enables advanced mild hybrid capabilities with greater fuel savings

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Improving battery power to such as level would further enable hybridization to near-HEV levels as well as engine downsizing, thereby enabling fuel economy improvements beyond the current 10-15% MHEV limit. The BISG is connected to a 48 V (nominal battery) and also typically to a 12V powernet via a DC/DC convertor. Abdellahi, A.,