5 ms·
It used to be an interview question I'd ask of electrical and electronic engineers: > You work for an EV company who has just invented a car which can charge a
by londons_explore 2y ago
It used to be an interview question I'd ask of electrical and electronic engineers:
> You work for an EV company who has just invented a car which can charge as fast as a regular car fills with gasoline (2 liters per second). Your job is to design the cable. Where are you going to start?
A good candidate will quickly realise the task is near impossible. One has to either accept cable which is unreasonably heavy, take huge energy losses, or have a 100kilovolt 10's of megawatts scale buck convertor ($1M of electronics) in every vehicle.
- sschueller 2y agoWhy do you need a cable? We are thinking in the realm of pumping fuel. Instead you could use a rail under the car or many other methods.
- londons_explore 2y agoHow many amps, how many volts, what will the rail be made from, how big will the pickup 'shoes' be?
- sschueller 2y agoYou can also "cheat" a bit by splitting the battery like some cellphones do now. Instead of charging one giant battery you are charging two smaller ones at the same time.
- outer_web 2y agoYou're all hired.
- mixmastamyk 2y agoWhat is the top reasonable voltage? Believe chargers are up to 800 now.
- deleted 2y ago[deleted]