Classification of automotive circuit boards
Car body electronic control system
Engine control system
Body control system
Chassis control system
On-board electronic control system
Three development trends of automotive electronics
Vehicle power system and electrification
Four major system subsystems of automotive electronics
Power control system accounts for 50%
Safety control system accounts for 22%
Body Electronic System accounts for 25%
Entertainment communication system accounts for 3%
Huihe Circuits knows that the reliability of automotive electronics is equivalent to the reliability of automobiles, so it is necessary to ensure that the reliability of automotive electronics meets the requirements of service life and environmental tolerance. The PCB used in the automotive electronic system needs to withstand the test of various environmental changes, such as temperature and humidity, climate, acid mist, vibration, electromagnetic interference, current impact, etc.; in order to ensure the normal life cycle, the PCB needs to meet high reliability, high integration, high The characteristics and requirements of heat dissipation, high current (thick copper), light weight and miniaturization, and embedded devices. For example, the high-voltage control system of a new energy electric vehicle uses a strong current board to integrate the original scattered high-voltage device parts, scattered DC/charge/discharge/MCU and other functional parts on a PCB. The density has increased several times, but The structural space should be saved by 30%, and the manual assembly efficiency should be increased by 50%.
Under this development trend, Huihe Circuits has taken the following measures to ensure the high reliability of PCBs for automotive electronics: Pass IATF16949 automotive quality management system standards; automotive electronic products have different reliability requirements for PCBs in different parts, and fully understand these requirements and Select appropriate materials and production processes, reliability testing and testing according to characteristics; formulate material selection rules; select appropriate materials according to the use parts of automotive electronic products during engineering planning; strictly follow the requirements of the control plan for production, monitoring and recording ; Key processes and key characteristics are monitored and analyzed by SPC; to ensure the stability of process parameters and the traceability of the production process; based on the IPC-TM-650 standard, a set of systematic and strict product performance testing methods and evaluations have been established Mechanism, including thermal cycle test, high temperature thermal shock, salt spray test, high current shock, high voltage resistance, electromigration, etc.
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