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Which automotive electronic circuit boards need to be cleaned

In order to achieve control of driving and various functions, various types of electronic circuit boards are used in cars to achieve various control functions: engine driving management system or engine driving computer ECU. New energy vehicles have more circuit boards, with an average circuit board area of 1.5 square meters per vehicle, up to more than 100 electronic circuit boards. These various electronic circuit boards are used to achieve various functions. What needs to be cleaned? What doesn't need to be cleaned?

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Whether the parts needed to be cleaned or not needed-to-be-cleaned of various functional control boards in automotive electronics is often distinguished from the driver's personal safety, the safety of people and property in the driving scene. For functional control related to automotive driving safety and third-party personal safety, cleaning is required to achieve high reliability technical requirements, such as in the engine driving management system ECU, new energy vehicle power management system BMS, energy storage BMS, and so on. Cars also have other management systems, lighting control systems, navigation, music playback and entertainment systems, door and window control and glass lifting, seat functions, and other auxiliary function systems. As these systems are not closely related to human life safety, these electronic circuit boards can often be made without cleaning to reduce costs and meet performance requirements.

 

The process cleaning of ECU and BMS systems involves cleaning the residue on the board surface, removing the residual effects of flux, solder paste, and other pollutants during the process, and truly achieving the cleanliness of the component surface. The ion contamination level is used as an indicator to measure the cleanliness of the board surface, which is the technical indicator that can truly achieve reliability assurance. It can greatly improve the safety and reliability of component products, eliminating unnecessary risks caused by defects caused by electrochemical corrosion and electromigration due to poor working conditions, humidity, and high temperature.


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