Maybe one day, the wire harnesses you produce are the best, but the car only needs a 100m wire harness
At the beginning of the article, I would like to ask everyone. When Tesla Model Y is delivered in China, what are the first things that major wire harness factories and OEMs need to do? Needless to say, it is definitely to buy a few to come back and disassemble, then measure whether the wiring harness is really only 100m, and then research the principle of Model Y wiring harness in reverse.
Model Y is not only a massive entry-level SUV built by Tesla, but also a product that disrupts the automotive industry.
On January 7, 2020, Tesla held a short ModelY project launch ceremony at the Shanghai Super Factory, which also foreshadows that Model Y will achieve local production in China, but according to the delivery progress of Model3, domestically produced Model Y Delivery will still have to wait until 2021. However, the American Model Y is expected to be delivered by the middle of this year.
I doubt again that it is not necessary to wait for the domestic delivery of Model Y. When Model Y is delivered abroad, there will always be several OEMs who can come back and disassemble it. In Tesla's products, we first select Model S, Model 3, and Model Y for simple comparison. The length of the Model S harness is about 3km, the length of the Model 3 harness is about 1.5km, and the length of the interior harness of the Model Y is shortened to 100 meters. The Model 3 is half the length of the Model S harness, which is also a revolutionary change. In the traditional car design, the length of the wiring harness can reach several kilometers, and the complexity is high.
We analyze from the little veil lifted by the Model 3. The CCM (Central Computing Module) is composed of three dense printed circuit boards: responsible for the infotainment system (IVI), the driver assistance system (ADAS), and the internal and external communication connections. . 1. The communication circuit board inside the car (bottom right) integrates a Telit 4GLTE module and Marvell's Ethernet switching chip. This is not unusual. It is speculated that the TCU function and the Ethernet function in the car are integrated into one.
2. In the ADAS circuit board module (bottom left), since Tesla and Mobileye parted ways and returned to the NVIDA camp, this part is not unexpected. They all use the NVIDIA DriverPX2 platform, but after NVIDIA launched Tegra Parker, the computing power has been One step higher than TegraK1; other parts should be the same as Audi zFAS, Altera CycloneV FPGA and Infineon's Auric TC297T are indispensable. From a single board perspective, this is the use of 2 Tegra Parker interconnects plus Cyclone V FPGA The design of collaborative computing undoubtedly improves the performance of zFAS by several orders of magnitude.
3. The most surprising module in the CCM is this infotainment / communications system circuit board (top right). From the back of this PCB board, the two huge metal rivet-shaped connectors distributed on the upper left and lower right are very similar to the sockets of Intel CPU sockets on our common computer motherboards, the two black connectors on the lower left, and Four fastening screws indicate that there is a small gusset on the front. He lifted off a little veil and only revealed you a back view, but from this we still see an unfathomable computing power. Sure enough, from the information disclosed, this CCM module responsible for IVI is equipped with an Intel Atom A3950 processor, and the small daughter board above integrates the NXP QorIQ chip. Obviously, NXPQorIQ is responsible for the communication interconnection and configuration management of the in-vehicle subsystems, and the X86-based AtomA3950 is responsible for the entire vehicle IVI system. What is even more shocking is that this X86 platform runs a car linux system built by Tesla itself.
In addition, more than 80% of the software used by Tesla is self-developed, and Musk's (Tesla CEO) ambition is evident.
Earlier, Musk had said that Model Y will be the world's shortest automotive wiring harness with a total length of only 100 meters. Compared with the 1500-meter wiring harness length of the Tesla Model 3, only Its 1/15. Significantly reducing the length of the wiring harness can reduce the resistance of the wire and thus reduce energy loss, which will play a positive role in improving battery life. At the same time, it can also increase the assembly speed. Installing a 100-meter line can save a lot of work than installing a 1500-meter line, which means that the capacity of Model Y will be greatly improved. I am here to say straight away, if the car wiring harness in the later period is only 100 meters. Ninety-nine percent of fans are estimated to be unemployed. In the past, because the wiring harness was too long and "too soft", assembly had to be done manually, which took a lot of labor. To this end, Tesla shortened the length of the wire harness from 3KM to only 100M, and set "structures" inside the wire harness to turn the wire harness into fixed parts, so that the assembly of the wire harness can be completed by a robotic arm, which greatly improves production Efficiency and reduce labor costs.
For electric vehicles, battery life is a key parameter. Significantly reducing the length of the wiring harness can reduce the resistance of the wire and thus reduce energy loss, which will play a positive role in improving battery life. Harnesses in traditional models usually develop into the third and most expensive part of the vehicle, with a maximum weight of 50kg and a total length of 5km. Compared to the length of the model Y's harness of 100, it is estimated that the weight of the harness is only 1 kg. This number is too scary. .
So, can ModelY achieve the goal of 100 meters of harness length? This is still a big suspense. However, the official news is that the model will introduce a number of innovative technologies and innovative materials. Among them is the technology currently used by SpaceX-Flexible Printed Circuit (FPC) technology, which is currently used in space vehicles. The revolutionary cable circuit brought by FPC, which can shorten the length of the entire car's wiring harness and provide each component with a redundant connection to the computing platform and battery. Flexible Printed Circuit (FPC for short) is a kind of highly reliable and excellent flexible printed circuit board made of polyimide or polyester film as the base material. It has the characteristics of high wiring density, light weight, thin thickness and good bendability. Let's first see what the FPC looks like?
It turned out to be this guy ... In fact, FPCs are rarely used in automotive wiring harnesses. As far as I know, in the traditional fuel vehicles, the Great Wall in China is mainly used in a narrow place in the ceiling space, and Yazaki has been used in some electrified models. Among new energy models, FPC is mainly used in automotive power battery pack. FPC features: 1, short: short assembly time, all lines are configured. Eliminating the need for redundant wiring connection work 2, small: smaller than the PCB can effectively reduce the volume of the product. Increase convenience in carrying 3, light: weight Lighter than PCB (hard board) can reduce the weight of the final product. 4. Thin: Thinner than PCB, it can improve the softness. Strengthen the assembly of the third space in a limited space
In fact, FPC is almost ubiquitous in communications, consumer electronics, industrial control, medical treatment, and then to military and aerospace. Looking at the development and application of Tesla, FPC has a trend towards the development of traditional automobiles. I haven't got comprehensive information and information about the Tesla Model Y harness, so I can only talk about it with you. Anyway, as the harness industry, we should have a sense of crisis. Kodak produced the best quality films until the day of bankruptcy, but the world no longer needed them. Leaving, sometimes it is not that you did something wrong, it is just that you are no longer needed. Maybe one day, the wire harnesses you produce are the best, but cars only need 100m wire harnesses.
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