Dayoushang Group launches the 11kW two-way battery charger solution based on ST products
Date：February 10, 2025 Views：26
Source: General Assembly Author: General Assembly
On January 16, 2025, the leading international distributor of semiconductor components in the Asia Pacific market, Dailian Holdings, announced that its Yousun unit launched an 11kW bidirectional battery charger solution based on ST's STDES-BCBIDIR products.
Figure 1- The display board of the 11kW bidirectional battery charger solution based on the ST 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, we have launched the 11kW bidirectional battery charger solution based on the ST STDES-BCBIDIR product. The scheme is equipped with advanced power conversion technology, which can realize efficient energy conversion between the energy storage system and the power grid, so as to effectively balance the power grid load and improve the energy utilization rate.
Figure 2- The application diagram of the 11kW bidirectional battery charger solution based on ST products
STDES-BCBIDIR is a complete two-way battery charger solution from ST. It consists of two power stages, PFC and isolated DC-DC stage. The PFC is based on a three-phase full-bridge topology and operates at 70kHz, ensuring efficient and stable energy input. Due to the external connection of the resonant unit, the structure of the DC-DC part can be configured to DAB (Dual-Active-Bridge) or CLLC (Capacitor-Inductor-Capacitor) topology to meet the efficient energy conversion under different conditions. In the DAB topology, the DC-DC stage operates at a fixed 100kHz switching frequency, while in the CLLC topology, the switching frequency can be adjusted between 82kHz and 235kHz.In terms of hardware, the STDES-BCBIDIR consists of a main power board, a driver board and a control board. Among them, the main power board integrates the ACEPACK DMT-32 SiC power module, which includes six topological M1P45M12W2-1LA modules for the power factor correction (PFC) stage, and two full-bridge M1F45M12W2-1LA modules for both sides of the DC-DC stage. In addition to these power modules, the main power board is equipped with high-capacity capacitors, sensing circuits and auxiliary power supplies to ensure a stable and efficient power supply. The driver board is designed for full bridge and six ACEPACK DMT-32 SiC power modules with electrically isolated 4A dual gate drivers based on STGAP2SiCD to ensure efficient operation of SiC MOSFETs. Based on the STM32G474RE series of microcontrollers, the control board is 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.
Figure 3- Block diagram of the 11kW bidirectional battery charger solution based on ST products
In addition, the solution offers upgradable firmware with additional features for reliability and security. Under the collaborative innovation of software and hardware, the system peak efficiency of this scheme exceeds 96%, and the dual optimization of energy utilization and cost control is realized.Core technical advantages:
Highly integrated ACEPACK DMT-32 power module;
High frequency operation to reduce weight and size;
Bidirectional capability;
DAB soft switching behavior is realized through enhanced modulation management technology.
Peak efficiency: greater than 96%.
Project specification:
PFC level: three-phase, two-level bidirectional AC-DC power converter:
Rated nominal AC voltage: 400Vac at 50Hz;
Nominal DC voltage: 800Vdc;
Nominal power: 11kW;
Rectifier mode: Power factor (PF) >0.99 inrush current control and soft start;
Inverter mode: Integrated grid-connected solution for active and reactive power control.
DC-DC class: Dual Active Bridge (DAB) /CLLC Power converter:
Nominal DC input voltage: 800V;
Nominal DC output voltage: 550V to 850V;
DAB switching frequency: 100kHz;
LLC switching frequency range: 82kHz to 235kHz.
About Lianda Holdings:
The company is a leading international distributor of semiconductor components in the Asia Pacific market. Headquartered in Taipei, it owns Shiping, Pinca, Trantrion and Yousun. It employs about 5,000 people, represents more than 250 product suppliers and has 73 distribution locations worldwide, with a turnover of USD 21.55 billion in 2023. Dalianda has created an industrial holding platform, focusing on international operation scale and local flexibility, long-term deep cultivation of the Asia-Pacific market, with the vision of "industry first choice. Channel benchmark", fully implementing the core values of "team, integrity, professionalism, efficiency", and winning the "Global Distributor Excellence Award" for 24 consecutive years. In the face of new manufacturing trends, DDA is committed to transforming into a Data-Driven enterprise, establishing an online digital platform - "DDA network", and advocating the intelligent Logistics as a Service (LaaS) model to help customers jointly face the challenges of intelligent manufacturing. Starting from good intentions and building trust with science and technology, we expect to build a competitive and cooperative ecosystem with the industry "Labang Jie", and actively promote digital transformation with the "focus on customers, technology empowerment, collaborative ecology, and create the era".
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