2 ms·

Automotive EE here… > the only thing an ev actually needs chips for is charge controllers which can be old fab tech, and motor controllers I wish I had the ti

Automotive EE here… > the only thing an ev actually needs chips for is charge controllers which can be old fab tech, and motor controllers I wish I had the time to explain how this could not be more wrong. Quickly, I’ll mention that the vehicle I’m working on has 8 separate modules for the driver’s seat. Inside these modules are a combined total of 10 processors with as many bootloaders and flash procedures and validation records and crypto and peripheral drivers, 17 CAN-FD modules, 6 system basis chips, 9 switching power supplies with a number of accessory LDO supplies, at least 40 more “chips” of various functions and capacities… for just the driver’s seat alone The steering wheel buttons for radio left and right side and the cruise control comprise 3 modules and power supplies and etc etc. >The Bollinger takes this route of minimalism. Ironically, an EV has less reliance on processing than a modern ICE vehicle. I know what you are trying to say, but it is largely incorrect. The EVs still have “engine” control modules and powertrain systems. Instead of figuring out injector pulse widths, they’re calculating deliverable torque. The ABS/brake controllers are more complex, the battery heating and cooling systems require modules and processing, the HVAC, the transmission, steering systems, everything is more complex compared to ICE with an old ample supply of hydraulics and coolants and a simple fuel that is stable and usable at all storage temps fed into a mechanical device. I’m not trying to be confrontational, but you couldn’t be more wrong about automotive electronics.

vel0city 5y ago
The previous poster is definitely massively oversimplifying things, and I do value your input as someone who actually works in the field. Obviously, there's still a lot of the same kind of controllers when it comes to all the switches and displays and motorized chairs and turn signal logic and all of those things which are practically the exact same as an ICE. And obviously there's some places where you don't need controllers and sensors on an EV where you would have them on an ICE, like mass airflow sensors and fuel injection controls and stuff like that. Meanwhile you do have additional circuitry like the inverters to actually drive the motors, BMS systems, there's still sensors on the motors and wheels and what not, brake regen, etc. You mentioned the transmission is more complex compared to an ICE, but that does not make much sense to me at all. To my knowledge most EVs are essentially fixed gear ratio gearboxes, so you're either in drive, reverse, or neutral. Meanwhile ICE transmissions are becoming more and more like computer-controlled manual transmissions what with the rise in popularity of dual-clutch automatic transmissions. To me it seems a ton more complicated keeping track of operating that DCT than just "the dial is in D, change transmission to the forward mode."

vel0city 5y ago

The previous poster is definitely massively oversimplifying things, and I do value your input as someone who actually works in the field. Obviously, there's still a lot of the same kind of controllers when it comes to all the switches and displays and motorized chairs and turn signal logic and all of those things which are practically the exact same as an ICE. And obviously there's some places where you don't need controllers and sensors on an EV where you would have them on an ICE, like mass airflow sensors and fuel injection controls and stuff like that. Meanwhile you do have additional circuitry like the inverters to actually drive the motors, BMS systems, there's still sensors on the motors and wheels and what not, brake regen, etc. You mentioned the transmission is more complex compared to an ICE, but that does not make much sense to me at all. To my knowledge most EVs are essentially fixed gear ratio gearboxes, so you're either in drive, reverse, or neutral. Meanwhile ICE transmissions are becoming more and more like computer-controlled manual transmissions what with the rise in popularity of dual-clutch automatic transmissions. To me it seems a ton more complicated keeping track of operating that DCT than just "the dial is in D, change transmission to the forward mode."