1、 Application scenarios

Circuit boards are widely used in the fields of power supply and new energy. In the fields of power supply and new energy, PCB boards not only need to support the functionality and performance of equipment, but also need to have strong thermal management, current load capacity, and anti-interference ability. With the continuous development of the new energy industry and power electronics technology, the application of PCB in this field will become increasingly important.

Our PCB boards are mainly used in the power supply and new energy fields, including switch mode power supplies (SMPS), AC-DC power supplies UPS、 Photovoltaic inverters, wind power generation, electric vehicle (EV) charging systems, energy storage systems, smart meters and distribution systems, frequency converters, charging equipment, etc.

2、 Difficulties in control

The power and new energy field circuit boards have the following characteristics compared to ordinary circuit board products: the board thickness is usually relatively thick (1.6-2.4mm), the copper thickness is relatively thick (2-3oz), the size is relatively large, mainly using tin spraying surface treatment technology, small batch, and multiple varieties. Specifically in the production and manufacturing of circuit boards, the following difficulties need to be controlled:

1. Material selection: The board material needs to be selected to be resistant to medium and high TG values, with medium and high CTI (CIT ≥ 250V or CIT ≥ 600V) to ensure that the circuit board does not deform after long-term use, and that excessive current does not penetrate the circuit board, resulting in component damage.

2. Copper thickness and line width should have margin: Power PCB boards usually need to carry large currents, so the circuit width, surface copper thickness, and hole copper thickness of the PCB need to be designed according to the current load. Using appropriate line width and copper thickness can effectively reduce resistance and prevent overheating.

3. Compression: Compression requires the use of multiple sheets of PP or PP with a relatively thick dielectric thickness, ensuring sufficient electrical isolation between layers to avoid the risk of electrical leakage or short circuit.

4. Hole thickness: It has a significant impact on the stability of the circuit board, mainly in two aspects: affecting the consistency of copper plating holes, which may lead to local thinning of copper holes, resulting in tearing and short circuits; On the other hand, excessive hole thickness can lead to CAF problems and temporary malfunction.

5. Solder plug holes: Due to the relatively thick thickness of the power board (with a large aspect ratio of holes to board thickness), and the surface treatment being mostly sprayed tin plates. Insufficient plug holes or false exposed copper can cause solder beads to jam or overflow, leading to short circuit problems in SMT.

How is the company managed and controlled?

We obtained IS9001, ISO14001, UL and other certifications as early as 2006, and TS16949 certification in 2008. With 5 management tools as the basic requirements, we have established a strict quality management system to ensure that there are no functional issues or defects. The following are our company's control measures:

In terms of materials, we use domestic and international top brands such as KB, Shengyi, and Taiwan South Asia for our copper-clad laminates, while CTI uses medium and high CTI to ensure quality from the source.

In terms of manufacturing, we use the positive plate process for the electroplating process to avoid the situation where there is no copper in the holes. At the same time, our hole copper and surface copper will be appropriately increased in thickness by at least 1-2um according to IPC2 requirements to ensure more margin; In terms of compression, our compression equipment is a high-temperature press from Taiwan Huoquan, with a maximum temperature of 280 ℃ and a temperature difference of up to 1 ℃, which can avoid insufficient stability of medium and high TG value plates during compression, resulting in poor compression uniformity and affecting electrical insulation performance. We guarantee that the hole thickness is ≤ 25.4um (60um for holes larger than 0.8mm), which is far below the industry standard. For solder mask plug holes, we use a slanted plug hole machine, which has a larger plug hole weight and a fuller plug hole,

3、 What are our customers in the power and new energy fields?

With a profound technical understanding of the power and new energy fields, stable quality, and flexible delivery times, we have gained the trust of many customers in the power and new energy fields. Here is a list of some of our power and new energy customers:

4、 Future improvement direction

The key role of PCB boards in the power and new energy fields is reflected in efficient energy conversion, stable control, and long-term reliable operation. With the global green industry revolution, power supply and new energy storage, green power generation, etc. will all usher in broader development space. In this field, our technical plan is: