On January 16, 2025, Da Da Da Da Da Holdings, an internationally leading semiconductor component distributor dedicated to the Asia Pacific market, announced that its subsidiary Youshang has launched an 11kW bidirectional battery charger solution based on STMicroelectronics' (ST) STDES-BCBIDIR product.

With the rapid development of electric vehicles and industrial energy storage systems, efficient and reliable bidirectional charging technology is gradually becoming the focus of the industry. In this context, Da Da Da Da You Shang has launched an 11kW bidirectional battery charger solution based on the ST STDES-BCBIDIR product. This solution is equipped with advanced power conversion technology, which can achieve efficient energy conversion between the energy storage system and the power grid, effectively balancing the power grid load and improving energy utilization efficiency.

STDES-BCBIDIR is a complete bidirectional battery charger solution under the ST brand. It consists of two power stages: PFC and isolated DC-DC stage. PFC is based on a three-phase full bridge topology with a working frequency of 70kHz, ensuring efficient and stable energy input. And due to the external connection of the resonant unit, the structure of the DC-DC part can be configured as DAB (Dual Active Bridge) or CLLC (Capacity inductor inductor Capacitor) topology to meet the high-efficiency energy conversion under different conditions. In the DAB topology, the DC-DC stage operates at a fixed switching frequency of 100kHz, while in the CLLC topology, the switching frequency can be adjusted between 82kHz and 235kHz.

In terms of hardware, STDES-BCBIDIR consists of a main power board, driver board, and control board. Among them, the main power board integrates ACEPACK DMT-32 SiC power module, which includes six sets of topology M1P45M12W2-1LA modules for power factor correction (PFC) stage, and two full bridge M1F45M12W2-1LA modules for both sides of DC-DC stage. In addition to these power modules, the main power board is also equipped with large capacity capacitors, sensing circuits, and auxiliary power supplies to ensure stable and efficient power supply. The driver board is designed specifically for full bridge and six sets of ACEPACK DMT-32 SiC power modules, using an electrically isolated 4A dual gate driver based on STGAP2SiCD to ensure efficient operation of SiC MOSFETs. The control board is based on the STM32G474RE series microcontroller, equipped with connectors for communication and programming, as well as test points and status indicators for debugging and monitoring, enabling comprehensive system monitoring and management.

In addition, the solution also provides upgradable firmware with additional features of reliability and security. Under the collaborative innovation of software and hardware, the peak efficiency of this scheme exceeds 96%, achieving dual optimization of energy utilization and cost control.

Core technological advantages:

ACEPACK DMT-32 power module with high integration;

High frequency operation to reduce weight and size;

Bidirectional capability;

Implementing DAB soft switching behavior through enhanced modulation management technology;

Peak efficiency: greater than 96%.

Scheme specifications:

PFC level: Three phase, two-level bidirectional AC-DC power converter:

Rated nominal AC voltage: 400Vac at 50Hz;

Rated nominal DC voltage: 800Vdc;

Nominal power: 11kW;

Rectifier mode: power factor (PF)>0.99 surge current control and soft start;

Inverter mode: Integrated grid connected solution for active and reactive power control.

DC-DC stage: Dual Active Bridge (DAB)/LLC power converter:

Nominal DC input voltage: 800V;

Nominal DC output voltage: 550V to 850V;

DAB switching frequency: 100kHz;

CLLC switch frequency range: 82kHz to 235kHz.

Regarding Dahua University Holdings:

Da Da Da Da Da Holdings is an internationally leading semiconductor component distributor dedicated to the Asia Pacific market, headquartered in Taipei. It has subsidiaries such as Shiping, Pinjia, Quanding, and Youshang, with approximately 5000 employees and over 250 authorized product suppliers. The company has 73 distribution locations worldwide, with a total revenue of USD 21.55 billion in 2023. Dahua University has established an industrial holding platform, focusing on international operational scale and local flexibility, and has long been deeply rooted in the Asia Pacific market. With the vision of "industry first choice and channel benchmark", it fully implements the core values of "team, integrity, professionalism, and efficiency", and has been recognized by the "Global Distributor Excellence Performance Award" for 24 consecutive years. Faced with the trend of new manufacturing, Dalian University is committed to transforming into a data-driven enterprise, establishing an online digital platform - "DaDaWang", and advocating the intelligent logistics service (LaaS, Logistics as a Service) model to assist customers in facing the challenges of intelligent manufacturing together. Starting from good intentions and building trust through technology, the University of Hong Kong hopes to collaborate with the industry to establish a competitive ecosystem, and actively promote digital transformation with the sixteen character approach of "focusing on customers, technology empowerment, collaborative ecology, and co creating the era".

This is reported by Top Components, a leading supplier of electronic components in the semiconductor industry

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Media Relations

Name: John Chen

Email: salesdept@topcomponents.ru