Applications

The topology structure of the 3.3kW EV on-board charger mainly includes PFC two-phase interleaved parallel connection and DC full bridge LLC structure. The PFC circuit adopts a two-phase interleaved parallel topology structure to reduce the volume of inductive devices and improve efficiency. The DC-DC converter uses a full bridge LLC topology to further improve the conversion efficiency of the circuit.

1. Technological progress and power improvement: With the development of new energy vehicle technology, high-power charging technology has become a major breakthrough in the current field of car chargers. In order to meet higher charging demands, the power level of car chargers is constantly improving. For example, the power of OBC under 400V architecture is mostly 3.3kW and 6.6kW, while in order to meet the charging needs under 800V architecture, 11kW and 22kW OBC have been developed and may become mainstream power in the future.

2. Changes in market demand: With the continuous expansion of the new energy vehicle market, consumers' demand for convenient and safe car chargers is also increasing. Domestic and foreign well-known brands dominate the market with their technological strength, brand influence, and well-established sales channels. Emerging brands are also actively seeking market breakthroughs through differentiation strategies and technological innovation, intensifying the intensity of market competition.

3. Integrated and lightweight design: Integrated and lightweight design have become important development directions. Through highly integrated design, car chargers can reduce volume and weight while maintaining efficient charging performance, thereby reducing vehicle burden and improving overall energy efficiency.

4. Industrial chain improvement: The upstream industrial chain mainly includes raw material suppliers, such as manufacturers of core components such as integrated circuits, PCB printed circuit boards, semiconductor power devices, magnetic components, connectors, and hardware structural components. The midstream industrial chain consists of manufacturers of car chargers, who are responsible for processing upstream raw materials into finished car chargers. The downstream industry chain mainly involves sales channels and end-users. The sales channels for car chargers include car 4S stores, car beauty stores, e-commerce platforms, etc.

In summary, the 3.3kW EV on-board charger still has certain applications in the new energy vehicle market, but with technological progress and changes in market demand, higher power and high-power charging technologies will become the mainstream trend in the future.

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