People are starting to think about this problem (and by problem I don't mean a problem on the same scale as global warming). Notably, former Tesla CTO JB Strau

People are starting to think about this problem (and by problem I don't mean a problem on the same scale as global warming). Notably, former Tesla CTO JB Straubel started a company doing battery recycling called Redwood Materials. We already have a metals recycling industry today (scrap yards and aluminum recycling) so I don't see why we can't have the same for batteries. Yes, they have to be handled using special processes to avoid fires but that is just an engineering hurdle that will be overcome. Car batteries easier to recycle than consumer electronics, because cars are already scrapped when they get too old because the raw materials in them have value. Consumer electronics are more difficult because the metals in them are in smaller quantities and so people won't want to drive to the recycling center to earn themselves 50¢ but a car may have several hundred dollars in raw materials. Also note that because the global EV industry is currently scaling and because it may take decades for a car battery to wear out, companies in this space will take time to grow because there just aren't enough dead car batteries out there to make mass scale recycling commercially viable yet.