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Understanding the Bolt EV


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Published on Dec 05, 2020
We are finally moved into our new building after a very long summer/fall without access to my cars, parts, cameras, etc. This is a custom video I made for the Doutor-IE event in Brazil on December 4, 5, and 6 2020. The Doutor-IE Circuit is the largest event of technical content for professional automotive repairers in Brazil. Yes, I know my glasses are crooked in the introduction ;)

CORRECTION: The Bolt EV does use a radiator in the Power Electronics cooling loop, but not in the High Voltage battery cooling loop. See my Bolt EV cooling system video at

A basic demonstration of the Bolt EV powertrain and Power Electronics.
0:00 Start
0:10 Introduction
1:53 MUST SEE: Electric Motor, Gears, and Operation
7:42 See the Drive Unit under the car
10:18 See the Drive Unit outside the car
15:28 Underhood components
17:07 The Junction Block
17:50 The Inverter
20:00 The DC-DC Converter
21:30 The On-Board Charging Module
23:50 The Cabin Coolant Heater
25:15 See Inside the Junction Block
27:33 DC Fast Charge Connections
30:26 The High Voltage Battery, Connections, and Heater
35:43 The Three Different Coolant Loops and Reservoirs
38:28 Video Summary and EV Common Components

Weber State University (WSU) - Davis Campus - Department of Automotive Technology - Ardell Brown Technology Wing - Transmission Lab.

W.S.U is a leader in Hybrid and Electric Vehicle education. We offer both online training and hands-on training classes on Hybrid and Electric Vehicles to the general public. Visit for more information.

This video was created and edited by Professor John D. Kelly at WSU. For a full biography, see

Donate to the Department of Automotive Technology at Weber State University here:
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