rechargeable battery 18650 3.7v

　　Ten focus technologies in the development process of switching rechargeable battery 18650 3.7v

　　From the perspective of division of labor, the production of power supplies mainly includes eight steps: plug-in, wave soldering, assembly, manual welding, online preliminary load inspection, screening inspection, finished product assembly, load aging inspection, and packaging. It seems that the process is not complicated, but each step can actually be divided into several links. After careful calculation, a rechargeable battery 18650 3.7v must go through more than a dozen processes to be produced. Let me tell you something more specific. For example, in the plug-in group, there are more than ten female plug-in workers on a production line (indeed, they are all younger female workers, because girls have more dexterous hands), which are divided into small-piece plug-ins and large-piece plug-ins. Most of the hundreds of components of the rechargeable battery 18650 3.7v are plugged and fixed by them, and then fed into the wave soldering machine. The subsequent assembly process also needs to be divided into 3 or 4 steps. The most classified category is quality control inspector. On the production line, they wear uniforms of different colors from other employees and are scattered among each division of labor. Inspect the products completed in the previous link one by one. The most critical load inspection needs to be carried out three times. The Chroma power dynamic comprehensive detector, which costs hundreds of thousands per unit, requires at least four groups to run simultaneously on a production line. Coupled with some other small links, every qualified rechargeable battery 18650 3.7v that comes off the line can be considered to have been refined.

　　1. Incoming material inspection

　　2. SMT process. SMT stands for surface mount technology. It is a process that uses a high-speed placement machine to place ICs in designated positions. rechargeable battery 18650 3.7v products using SMT technology can significantly reduce the volume of internal components of the rechargeable battery 18650 3.7v, thereby causing power loss. However, due to the high value of SMT equipment and the high quality requirements for materials, many domestic rechargeable battery 18650 3.7v manufacturers (including some well-known brands) rarely use it.

　　3. Plugging work of slightly larger components

　　4. The semi-finished rechargeable battery 18650 3.7v will be sent to the wave soldering machine for welding (RHOS environmental standards)

　　After wave soldering of the rechargeable battery 18650 3.7v, theoretically all components will be firmly welded to the PCB.

　　5. Conduct a comprehensive test on the rechargeable battery 18650 3.7v (CHROMA electronic load automatic tester)

　　6. Packaging process

　　7. Test in aging room

　　8. Use CHROMA again for a comprehensive physical examination

　　A small rechargeable battery 18650 3.7v seems simple but in fact it goes through such a complicated process from components to final product.

　　Ten technical focuses in the development process of switching rechargeable battery 18650 3.7v

　　In the 1960s, the advent of switching power supplies gradually replaced linear regulated power supplies and SCR phase-controlled power supplies. Over the past 40 years, switching rechargeable battery 18650 3.7v technology has developed and changed rapidly, and has experienced three development stages: power semiconductor devices, high frequency and soft switching technology, and integration technology of switching rechargeable battery 18650 3.7v systems.

　　Power semiconductor devices have developed from bipolar devices (BPT, SCR, GTO) to MOS devices (power MOSFET, IGBT, IGCT, etc.), making it possible for power electronic systems to achieve high frequency and significantly reduce conduction losses, circuits It's also simpler.

　　Since the 1980s, the development and research of high-frequency and soft-switching technologies have enabled power converters to have better performance, lighter weight, and smaller size. High frequency and soft switching technology have been one of the hot topics in the international power electronics community in the past 20 years.

　　In the mid-1990s, integrated power electronic systems and integrated power electronic module (IPEM) technology began to develop. It is one of the new issues that needs to be solved urgently in the international power electronics community today.

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