Why Carmakers Can’t Transition to Newer Chips

Re:Why Carmakers Can’t Transition to Newer Chips by boznz on Saturday October 02, 2021 @09:38PM (#28733813)

if we are going to 48V then pretty sure all power switching would use solid state relays/MOSFETs, Any mechanical switch would just be the input to a micro at 5V or lower.

You could also just switch the HV (400V+) bus directly down to 48/60V as all the high current devices motor/ac/power steering etc run off the HV bus and you would just be left with lights, entertainment and servos on the low voltage side. The 12V battery is probably a bit silly when you have a 50KWH main battery and 97% switching conversion efficiency regulators and I am guessing it may disappear in the next 10 years

[ Parent | on HN ]

Re:Why Carmakers Can’t Transition to Newer Chips by petre on Sunday October 03, 2021 @01:45AM (#28734813)

Do BEVs still use a 12V lead acid battery?

[ Parent | on HN ]

Re:Why Carmakers Can’t Transition to Newer Chips by Corrado on Sunday October 03, 2021 @02:27PM (#28739356)

Yes, my Model Y has a "traditional" 12v lead acid battery. Granted its a small battery as it doesn't have to run any heavy loads (starter motor). Furthermore, it's my understanding that newer Tesla vehicles are being delivered with 12v gel batteries instead of the the lead acid design.

[ Parent | on HN ]

Re:Why Carmakers Can’t Transition to Newer Chips by boznz on Sunday October 03, 2021 @02:26PM (#28739347)

nissan leaf does

[ Parent | on HN ]

Re:Why Carmakers Can’t Transition to Newer Chips by petre on Sunday October 03, 2021 @02:29PM (#28739371)

That's a bit silly. What's it used for? Couldn't they just use a step down switching power supply that draws current from the main battery?

[ Parent | on HN ]