Customers often don't understand why automobile electronic circuit boards need to be cleaned for reliability, and which of all kinds of electronic circuit boards need to be cleaned for various functions? Which do not have to be cleaned? It is also difficult to distinguish and judge. This paper aims to analyze the necessary reliability cleaning of automobile electronic circuit board, hoping to help customers and readers。
In order to realize the control of driving and clock functions, various types of electronic circuit boards are used to realize various control functions: engine driving management system or engine driving computer ECU, and there are more circuit boards for new energy vehicles, with an average area of 1.5 square meters for each vehicle and up to 100 electronic circuit boards. These kinds of electronic circuit boards are used to realize various functions. What needs cleaning? Which do not have to be cleaned?
The cleaning and non cleaning of various function control boards of automobile electronics are often distinguished from the personal safety of drivers, the personal and property safety of driving scenes. The function control related to the driving safety of automobiles and the personal safety of the third party needs to be cleaned to meet the technical requirements of high reliability: for example, in the ECU circuit board of engine driving management system, the circuit board of new energy vehicles BMS circuit board of power management system, etc.
There are other management systems, lighting control system, navigation, music playing and entertainment system, door and window control and window lifting, seat functions and other auxiliary function systems in the car. Because these systems are not too dense with human life safety, often these electronic circuit boards can be made without washing, so as to reduce the cost and meet the performance requirements.
Process cleaning of circuit board in the process of driving computer ECU and new energy vehicle BMS power management system, cleaning of circuit board surface residue, removing the residual influence of flux, solder paste residue and other pollutants in the process, so as to truly achieve the cleanness of circuit board component surface, and measuring the cleanness of board surface with ion pollution degree as the index, which can truly achieve reliability Technical indicators of guarantee. It can greatly improve the safety and reliability of circuit board components, and avoid unnecessary risks caused by defects caused by electrochemical corrosion and electromigration of circuit board caused by poor working conditions, high humidity and temperature.
To sum up, reliability cleaning must be carried out for the component process closely related to life safety and driving safety. At present, it is recommended to adopt the water-based cleaning process of environmental protection and safety.
The above article is for reference only!