BrownOuttaSpec
Active Member
Ah, so that's why they limit full power for only 5 seconds. Sounds like they knew about this problem years ago and was hoping to sweep it under the rug. Oops! Sounds familiar though... hmmmm.....So what are they limiting by software - Fast DC charging or fast driving? This is either a design error or a poorly made part since it is subject to being weld closed or significant deformation. The software correction is a poor work around.
"On affected vehicles, Direct Current (“DC”) fast charging and repeated wide open pedal events can cause the high voltage battery main contactors to overheat. Overheating may lead to arcing and deformation of the electrical contact surfaces, which can result in a contactor that remains open or a contactor that welds closed. An overheated contactor that opens while driving can result in a loss of motive power, which can increase the risk of an accident."
Narrator : [20:35] A new car built by my company leaves somewhere traveling at 60 mph. The rear differential locks up. The car crashes and burns with everyone trapped inside. Now, should we initiate a recall? Take the number of vehicles in the field, A, multiply by the probable rate of failure, B, multiply by the average out-of-court settlement, C. A times B times C equals X. If X is less than the cost of a recall, we don't do one.
Woman on Plane : Are there a lot of these kinds of accidents?
Narrator : You wouldn't believe.
Woman on Plane : Which car company do you work for?
Narrator : A major one.