This project is a high-power density Charger-converter that integrates two functions: OBC (On-board charger) and DCDC (direct current conversion unit). Realize the output of AC lateral high-voltage battery and low-voltage power supply system during charging, with power freely distributed from 0 to 100%. The maximum power of OBC is 6.6kW, the maximum power of DCDC is 2.5kW, and the total maximum output power is 6.6kW; During discharge, the high-voltage battery outputs power to the low-voltage power supply system and inverter, with 0-100% free distribution of power. Innovative design is adopted to achieve integration of three ports on the bus side, high-voltage side, and inverter side, reducing the number of power transistors and achieving device sharing, thereby improving power density and reducing costs.

We evaluate this product from multiple dimensions such as appearance, user experience, reliability, and cost. Through innovative and reliable design, OBC provides users with an extremely safe and convenient charging experience. DCDC provides the necessary power for auxiliary devices such as the power steering system and air conditioning section. In addition, it is connected in series with supercapacitors in the composite power supply system to regulate power output and stabilize bus voltage. While ensuring product performance and reliability, we have reduced overall volume, increased power density, and adopted a platform based design concept to reduce user usage costs and create more value for users.

After the project promotion, it has received the attention of multiple vehicle manufacturers and has been designated for multiple vehicle models, and has been successfully imported into batches.

Promote the further development of technology in the Charger-converter industry, further improve product power density and reliability, and provide more options for in car charging systems for EV and PHEV. The high efficiency and strong adaptability of the product to the power grid are more friendly to the existing power grid environment.

This project involves a total of 30 senior personnel full-time, responsible for market planning, project management, system scheme design, hardware design, structural design, software design, industrial design, testing and validation, process import, etc., with multiple external experts participating in the guidance.

Deeply understand the customer needs of multiple vehicle manufacturers, organize expert discussions and technical solutions, strictly follow the IPD and APQP related processes during the project development process. In order to ensure the quality of the project development process and reduce technical risks during the development process, multiple technical reviews have been set up according to the product development process, providing technical guidance and correction to the project development team, and ensuring that the project development meets the expected goals of project initiation. At the same time, fully utilize and motivate experts to participate in various stages of review during the process, check technical difficulties and risk points, and ultimately achieve mass production smoothly through rigorous testing.

The project took more than 3 years from research to project approval, design, and verification delivery, with a total investment of over 2 million in development funds.

This project is our first project in the field of Charger-converter, in line with the company's strategic plan. Through the development and mass production of this project, we have received great recognition from customers, successfully entering the field of Charger-converter, expanding the enterprise's product line, forming a product portfolio advantage, enhancing the enterprise's competitiveness, enhancing brand influence, and product market share in the segmented market.