The Tesla Bricking controversy could smash Tesla Motors
Yesterday a controversy popped up over the risk of Bricking a Tesla Roadster if it sits idle, parked, and not plugged in for a few weeks. Some subsystems that never turn off will drain the battery pack far enough to render the Roadster an inert hunk of metal and carbon fiber. In the wake of this report we have a duel between websites, possible indiscretions by Tesla Motors, uncertainty over whether future Model S and Model X owners will face the same issue, and public sentiment turning against Tesla.
The issue is that some subsystems in the Tesla Roadster stay on, draining power from the battery, even if the car itself is "off". Because there is no protection against the battery pack being drained completely, this can ruin the battery pack. It's well known in battery pack design that lithium battery cells are permanently damaged if the voltage falls below a low voltage cutoff point, such as would happen if the pack has a constant drain and is not recharged. Tesla has confirmed this can occur, but downplays the bricking risk because they not only warn Roadster owners against this possibility, they also proactively monitor (remotely) the state of charge in all Roadsters to detect ones whose battery pack is dangerously low. One can interpret Tesla's stance as pushing the responsibility on the owner, just as the owner of a gas car is responsible for regular oil changes necessary to avoid damage to the car.
One note in passing. A battery pack replacement wouldn't be needed if the Tesla Roadster contained circuitry to shut everything off before the battery pack state of charge fell too low. If the state of charge fell too low, and automatic protection circuits shut everything off, a service technician would simply be able to force the car into recharge mode. Because the battery pack has to be replaced in these cases, it demonstrates that the Roadster does not have an automatic protection of this sort.
The controversial part of this comes from a story published on Green Car Reports, and a response published on Jalopnik. GCR somehow obtained a letter from Max Drucker, owner of Tesla Roadster #340. In that letter Drucker explained how he had met Elon Musk at the Model X launch party, how he has deposits down on both the Model S and Model X, how he is a great fan of Tesla, but that he is gravely concerned over the risk to Tesla due to the design flaw that bricked his Tesla Roadster. In their response Jalopnik questions how GCR got ahold of that letter, and points out that GCR's article title changed from "Is Tesla 'Bricking' Story Just An Angry Owner's Shakedown" to the less inflammatory "Is Tesla 'Bricking' Story Just An Angry Owner's Warranty Claim."