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Semi-Truck Industrial Application

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I am doing a project for my graduate degree and I need some information regarding Tesla power electronic drives.

Do tesla cars have braking resistors for use in emergency in case there's too much current going into the battery too quickly? This could occur if there is an overdriving load beyond specification limits for the battery (i.e. ramming the rear end of the car while reversing).

I had an idea for the Tesla trucks, and the car's safety features would be similar to the trucks. Could several trucks have their batteries wired in series (while parked) for use as a DC bus for industrial appliances? These batteries could be combined with a gen-set and Vacon (Finnish company) regenerative drive unit to power mobile industrial equipment such as waste treatment setups or oil fracturing pumps.

A convoy of trucks would include one truck with a large gen-set, fuel tank and regenerative unit to charge the battery-backed bus with the generator and operate as a locomotive.

I just need to know if the trucks will have built in resistors to facilitate excessive current discharges from the regenerative unit as the generator accelerates, decelerates, or the load increases or decreases quickly.

An even bigger dream would be mechanically coupling semi trucks/tractors in an alternating daisy chain and having one trailer carry a generator set to power the entire "train" as a locomotive. It would require a police escort in urban areas, but this would be a fabulous way of efficiently moving large mobile installations comprised of multiple semi-trailers. Gas fracturing operates this way, but it could be used for mobilized water treatment (as the military already does). This would be a privatized version much more efficient than ever before if one large generator could feed all of the truck batteries wired in parallel through a regenerative drive (as sold by Vacon).

Let me know if anyone has an answer to the resistor question please.
 
Semi truck battery packs can absorb energy at rate no less than 1MW for short period. I don't see a reason to have a resistor.
Current flow can change directions as fast as it wants. Such a battery acts like a DC capacitor. Charging station must be able
to handle flow changes making AC into DC and visa-versa at whatever rate you think is necessary.

Tesla semi has full-size brake system as a backup in case battery can't handle regenerative energy.