Under the current wave of electric vehicles, horsepower is becoming cheaper and cheaper, the corresponding endurance anxiety is becoming more and more serious, and now that the power gap of the motor is not obvious, it is obvious that the endurance and charging speed of electric vehicles are the parameters that everyone gives priority to when buying electric vehicles. Of course, while fuel vehicles are desperately reducing prices to survive, the price of electric vehicles is also constantly declining, and cost control is also a top priority for major new power manufacturers. Such a complex market environment is the real reason for the large-scale recall of Tesla Model 3 again.
"Tesla recalled again? Is this the rhythm of a few months to come to the first hand? Xiao, a colleague in the editorial department, saw the recall information of tesla Model 3 and frowned.
"It's not strange, it didn't directly upgrade all the OTA things are already very good," another colleague of the wrong Peng Cannon, a face of indifference to the next sentence.
"I remember a hardware problem when I failed?" How does the Tesla solution still have to be upgraded by an OTA? ”
"I went, really OTA again? After this, the recall can be replaced by air? ”
The recent Tesla Model 3 has once again announced that the recall has been hyped up, of course, the reason for the high heat of this recall is because a car owner is very appropriate because of the fault in the recall in the tunnel, the speed of the closed road is not slow, and it is very dangerous to suddenly lose speed in such road conditions. Compared with Tesla's recall plan, the practice of first upgrading the OTA and then replacing the parts in the after-sales department is very unreliable in most people's subjective feelings. But Tesla's logic is that I first add a monitoring software to the vehicle software through the OTA upgrade, so that customers who have problems immediately go to replace the parts first. From the manufacturer's point of view, this is undoubtedly a very clever approach, not only so that the pressure of the after-sales department will not explode instantaneously, but also let the number of recalls from the user's feeling less, reducing the impact of word-of-mouth. But, like the user who happens to be bad in the middle of the road, you never know when the hidden danger will become a failure, and the bet on this random probability is always at the expense of a part of the customer as a statistically small probability.
Talk about the core of this recall, that is, the inverter in the recall announcement, theoretically the role of this inverter is similar to the role of rectifiers in old-fashioned fluorescent lamps, except that one converts alternating current into direct current, and the inverter converts direct current into alternating current. These two types of electrical equipment have a common feature, that is, they are prone to heat. In addition to the problem of battery energy density of electric vehicles, another problem that is difficult to solve is heat accumulation, and the most feared problem of electronic components is precisely the heat accumulation problem. After many electronic components exceed the operating temperature, the electrical properties will change, and the failure rate will naturally increase under the accumulated heat. Especially now when the battery charge and discharge power is greatly increased, the heat accumulation effect between electrical components will be more serious. Therefore, relying on OTA alone to increase the monitoring program is obviously not a long-term solution, and quickly replacing the hidden parts for the user is the solution.
Of course, in addition to the improvement of battery charge and discharge performance, excessive cost control is also one of the important reasons for this hidden danger, I believe that many careful users have found that the tesla Model 3 battery pack thermal management system and the battery thermal management system on the Model S are not the same, due to the cost, Tesla Model 3 uses a cheaper battery thermal management system, the performance of whether it can fully play the design intention is unknown. Especially after Tesla Model 3 has undergone several rounds of price cuts, and the inverter of what the official called "non-critical" components has been recalled several times, this situation is very doubtful.
"In fact, the practice of directly recalling replacement parts for the entire batch of traditional car companies is still more secure."
"But the innovative Tesla will obviously not be the same as the traditional car companies."
"Although the practice of upgrading and detecting the program of OTA is a chicken thief, it obviously cannot prevent the hidden danger from suddenly becoming a failure."
Write at the end:
Now electric vehicles, or the entire new energy automobile industry are excessively pursuing high energy density and battery high-power charging and discharging performance, so that the pressure of the vehicle thermal management system will also increase geometrically, although the official declaration of the inverter is not a key component, but the hidden danger that can cause the vehicle to stall at high speed is definitely not a small problem, and the replacement parts of the entire problem batch are the right way to solve the problem.