As cars develop intelligently, cars are converted from mechanical systems to electronic systems. At present, the proportion of original electrical and electronic products used in automobiles has increased from 25% to 40%, while ADAS, autonomous driving, and vehicle information. The system and the Internet of Vehicles all require hardware tickets. How to find a breakthrough point becomes especially critical.
Wireless BMS concept carThe first wireless car battery management system (BMS) concept car was developed by Linear Technology's design partner LION Smart, which uses Linear Technology's highly accurate battery pack monitor and its SmartMesh wireless mesh network on the BMW i3. Integration has been implemented to replace the traditional wired connection between the battery pack and the battery management system.
This major breakthrough solves the long-standing reliability problems caused by automotive wiring harnesses and connecting lines in electric vehicles and hybrid/electric vehicles, and simplifies BMS design and manufacturing.
According to a linear engineer, automakers face the challenge of ensuring the safety and reliability of both electric and hybrid vehicles. The LTC6811 battery pack monitor measures voltages of up to 12 series-connected batteries with an accuracy of better than 0.04%, combined with the SmartMesh wireless mesh network system to solve the problems caused by automotive wiring harnesses and connectors. Long-standing reliability issues.
Wireless BMS System OpportunityThe basis of BMS is to understand the state of the car battery by measuring the voltage, current and temperature. The prominent way of the cable is safe, intelligent, environmentally friendly and cheap. It has been used ever since. SmartMesh's wireless BMS is smarter, smarter, more environmentally friendly, and cheaper than traditional wired BMS systems. In addition to the industry's development and advancement, its market prospects should not be underestimated.
More secure: Whether it is CAN bus or isoSPI bus, the battery monitoring chip is connected in series by daisy chain. Once there is a problem in some connection, the whole system will be paralyzed. Linear's wireless BMS solution does not have this problem, path grading and frequency hopping, achieving more than 99.999% reliability; SmartMesh is a dedicated network with 128-bit encryption, which is more secure;
Smarter: The wireless connection solution makes the battery pack position more flexible, and has better scalability. It can easily increase the temperature, current and other sensors according to the application requirements. In the harsh environment, it has time synchronization. The advantages''
More environmentally friendly: The wireless solution saves 10m wire and 0.5kg connector and phase changer per car. Therefore, for every 50,000 vehicles produced, 500km of wire and 25,000kg of connectors and phase changers will be saved. While saving costs, it also meets the trend of lightweight vehicles;
Cheaper: Wireless reduces assembly costs, future silicon is cheaper than wires and connectors, and total BMS costs will be lower.
In addition, with the network composed of SmartMesh IP, there are currently 60,000 networks adopting this technology in the world, and the maximum number of nodes supported is several thousand. Using time synchronization and frequency modulation technology, data congestion such as network bursts can be effectively avoided. In addition, many of the features are similar to the SmartMesh technology previously applied to BMS.
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