The Role of Silicon Nitride Substrate in New Energy Vehicles

Did you know? Today's new energy vehicles contain a black technology material like a "ceramic sandwich" - silicon nitride substrate. Although its name sounds like a high-end product in the laboratory, it has quietly changed our daily life of driving electric vehicles. Today, let's talk about how powerful this thing is.

First of all, we have to talk about why electric vehicles need this material. The engine of a traditional fuel vehicle "heats up quickly and cools down quickly", but the heart of an electric vehicle - the motor and battery, can be like a small stove when working, especially the power chip called SiC MOSFET (the core component that controls the speed of the vehicle), which generates a terrifying amount of heat. At this time, the silicon nitride substrate comes into play. It is like a super heat sink that can quickly conduct the heat generated by the chip, and its insulation performance is particularly good, and it will not leak electricity like metal. It is said that using this material can increase the battery life of electric vehicles by 5%-10%, which is equivalent to driving dozens of kilometers more without charging.

For example, during sudden braking or bumpy roads, ordinary materials may not be able to withstand vibrations, but silicon nitride substrates are as hard as steel plates and have excellent toughness. Kyocera of Japan has conducted tests and found that this substrate can withstand 5,000 cycles of repeated use at temperatures between -40°C and 125°C without breaking, and can withstand 300 amperes of current like a toy. So now in high-end electric vehicles, key parts such as inverters and charging modules use it, which is equivalent to equipping the electric vehicle with an "indestructible" armor.

What's even cooler is that this material can also help car companies save money. In the past, only Japanese and American companies could make components such as high-voltage relays, and the price was ridiculously expensive. Now domestic companies have also begun to make breakthroughs with silicon nitride technology, and maintenance may be much cheaper in the future. Moreover, with the popularization of fast charging technology, 800V high-voltage systems have become a new trend, and the high-voltage resistance of silicon nitride substrates comes in handy, and the charging speed is so fast.

Of course, any new technology has challenges. At present, the production cost of silicon nitride substrates is still relatively high, but think about it, lithium batteries were also very expensive ten years ago, and now they are still very cheap? Maybe in a few years, even Wuling Hongguang MINI will use this technology. Next time you get on a tram, you can secretly think: there may be a few "ceramic sandwiches" hidden in this car, quietly helping you save electricity, save money and keep safe!

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