Tesla Model 3 Versus Chevrolet Bolt EV: High Voltage Components Compared

We just published a great video by Professor John Kelly at Weber University detailing all the high voltage components of the Bolt EV. One of the first comments to that article was a request by Cosmacelf to do a comparison with Tesla Model 3. Great idea. Here we go. All these components in the Bolt and assembled into one easy to see grouping. Lots of components stuffed into the small front compartment which normally would house an ICE in a gas car (no frunk in the BoltEV). What we see is that Tesla has eliminated two of these components. In other cases, Tesla has combined functionality of two Bolt EV components into a single component. Most interesting is the complete elimination of the battery heater. That function is now provided by the traction motor. Tesla has figured out a way to use the traction motor as a heater even when the vehicle is parked, which saves space and costs associated with the battery heater. 15hp 1.1kw 60l 115psi Belt Driven Electric Air Compressor The second most fascinating discovery is that Tesla has integrated the DC-DC converter and the on board charger into one unit that’s located in the high voltage battery “Penthouse,” which is integral with t...

Since the Tesla Model 3 and Chevy Bolt were introduced, there has been considerable interest in

Since the Tesla Model 3 and Chevy Bolt were introduced, there has been considerable interest in the heart of their performance, the battery packs. These two cars have been pivotal in introducing lower-cost long-range electric transport. The Bolt sources its pouch type cells from LG Chem, while the Model 3 uses cylindrical cells sourced from Panasonic. The pack construction, design, and cooling use distinctly different approaches, and the cell chemistries differ. Both packs are sealed with entry points for liquid coolant and electrical connections. As with all well designed battery packs, the lithium cells are monitored and balanced with battery management systems (BMS). There are several Model 3 battery pack teardowns. Jack Rickard of EVTV disassembled a Model 3 pack, which begins at 29:00 in this video. Munro also did a teardown video for Motor Trend. The Munro teardown is extensive and detailed and also includes the rest of the car. The pack consists of cylindrical 2170 cells actively thermal managed and liquid cooled with flat coolant tubes in contact with the cells. This method of direct contact cooling effectively allows coolant to flow in a tube in contact with the sides o...