automatic driving Adas thermal management

      5G era means a new era of information technology of all things. ADAS () may become the standard configuration of vehicles. With the progress of science and technology, its functions are more and more, and the chip performance requirements will be continuously enhanced, which will bring serious thermal management problems.

1. Adas has more and more functions, such as electronic police system ISA, Internet of vehicles, adaptive cruise ACC, lane offset alarm system LDWS, lane keeping system, collision avoidance or pre collision system, night vision system, adaptive light control, pedestrian protection system, automatic parking system, traffic sign recognition, blind spot detection, driver fatigue detection, downhill control system and electric vehicle alarm system.

2. Adas is mainly composed of GPS and CCD camera detection module, communication module and control module. There are many chips, and the computing power and power consumption of the chips are increasing.

          It can be seen that the cooling demand of ADAS is gradually prominent. The common heat dissipation method of ADAS is mainly natural cooling. Although the ADAS shell is metal and dissipates heat quickly, due to the limited internal space, it is impossible to blow out the heat with a built-in fan. Therefore, thermal interface materials such as thermal grease and thermal conductive PAD are needed to improve the heat dissipation capacity of the chip. The heating chip and the metal heat dissipation shell conduct rapid heat transfer through thermal conductive silicone grease, thermal conductive gasket, etc.

    Besides，The shell is often designed as a fin, which increases the contact area with the air and is conducive to efficient heat dissipation.

       With the continuous enrichment of ADAS functions, more algorithms are involved, data processing consumes more computing resources and generates a lot of heat. Natural cooling can no longer meet the heat dissipation requirements of such high computing. Therefore, some manufacturers will use liquid cooling for heat dissipation, such as autopilot HW 3.0 of Tesla Model y.