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With the transformation of the global energy structure and the development of green economy, the utilization of renewable energy and the progress of energy storage technology have become the key factors to promote the energy revolution. In this context, the market demand for bidirectional battery chargers as an important link between renewable energy, energy storage systems and the grid are growing. Bidirectional battery chargers can not only realize the efficient conversion and storage of electric energy, but also optimize energy utilization through intelligent dispatching, and improve the stability and reliability of the power grid. Especially in the fields of electric vehicles, industrial energy storage, and smart microgrids, bidirectional battery chargers have broad application prospects.
However, traditional bidirectional battery chargers still have many challenges in terms of efficiency, reliability, and cost. Today, China Exportsemi recommends an 11kW bidirectional battery charger solution, which is based on the advanced products of STMicroelectronics (ST) and launched by WPG Yosun Group, which can meet the market demand for efficient, reliable and economical bidirectional battery chargers. With its excellent performance and innovative technology, the solution provides users with new energy solutions to help achieve green, intelligent and efficient energy management.
Product Features (Highlights)
- Highly integrated ACEPACK DMT-32 power module: This module integrates advanced power devices and circuit design, making the entire charger solution smaller and lighter, while improving power density and system reliability. This highly integrated power module design not only simplifies the assembly and maintenance of the system, but also saves space and cost for the user.
- High-Frequency Operation: The PFC stage in the scheme operates at 70kHz, the DC-DC stage operates at a fixed 100kHz switching frequency in a DAB topology, and the switching frequency can be adjusted between 82kHz and 235kHz in a CLLC topology. High-frequency operation helps reduce the weight and size of the charger, reduces electromagnetic interference, and improves the responsiveness and dynamic performance of the system.
- Bidirectional capability: The solution supports bidirectional energy conversion, which can not only convert the AC power from the grid to DC power to charge the battery, but also reverse the DC power of the battery into AC power and feed back to the grid. This bidirectional capability makes the charger more flexible and practical in application scenarios such as electric vehicle charging stations and industrial energy storage systems, and can realize the efficient use of energy and the intelligent dispatch of the power grid.
- DAB soft switching behavior through enhanced modulation management technology: In the DAB topology, the soft switching behavior is realized through advanced modulation management technology, which effectively reduces switching loss and electromagnetic interference, and improves the efficiency and reliability of the system.
- Peak efficiency: >96%: With the collaborative innovation of software and hardware, the peak efficiency of the system exceeds 96%, realizing the dual optimization of energy utilization and cost control. High efficiency not only reduces energy loss, reduces operating costs, but also reduces the impact on the environment, which is in line with the development trend of green energy.
Figure: WPG Yosun's 11kW bidirectional battery charger solution based on ST products
Technical Specifications:
- PFC Grade:
- Three-phase, two-level bidirectional ac-dc power converters
- Nominal AC Voltage Rating: 400Vac at 50Hz
- Rated nominal DC voltage: 800Vdc
- Nominal power: 11kW
- Rectifier Mode: Power Factor (PF) >0.99, Inrush Current Control and Soft Start
- Inverter mode: Active and reactive power control integrated grid-tied solution
- DC-DC Grade:
- Dual Active Bridge (DAB)/CLLC power converters
- Nominal DC input voltage: 800V
- Nominal DC Output Voltage: 550V to 850V
- DAB switching frequency:100kHz
- CLLC Switching Frequency Range: 82kHz to 235kHz
Figure: Block diagram of WPG's 11kW bidirectional battery charger solution based on ST products
Application scenarios
- EV Charging Stations: In EV charging stations, this bidirectional battery charger solution enables efficient energy conversion to provide fast and reliable charging services for EVs. At the same time, its bidirectional capability can also feedback the excess electric energy to the power grid after the electric vehicle battery is fully charged, realize the efficient use of energy and the intelligent dispatch of the power grid, and alleviate the load pressure of the power grid.
Figure: Scenario application diagram of WPG Yosun's 11kW bidirectional battery charger solution based on ST products
- Industrial energy storage system: In an industrial energy storage system, the solution can efficiently store the power from the grid in the battery, and at the same time release the power back to the grid when needed, so as to achieve energy balance and optimization. Its high efficiency and high reliability ensure the stable operation and efficient management of the energy storage system, reduce the operating cost of the enterprise, and improve the energy efficiency.
- Smart microgrid: In a smart microgrid, this bidirectional battery charger solution can be used as an important energy conversion device to achieve efficient energy exchange between the microgrid and the large grid. Its bidirectional capability and high efficiency enable the microgrid to flexibly respond to the needs of the power grid, realize the optimal allocation and intelligent dispatch of energy, and improve the stability and reliability of the microgrid.
- Emergency backup power supply: In the emergency backup power system, this solution can quickly convert the electrical energy in the battery into alternating current when the normal power supply is interrupted, providing continuous and stable power supply for critical equipment. Its high efficiency and high reliability ensure the stable operation of the emergency backup power system, ensure the normal operation of key equipment, and improve the emergency response capability of the system.
Contact us
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About WPG Holdings:
Headquartered in Taipei, WPG Holdings, a top semiconductor distributor in the Asia-Pacific region, has more than 5,000 employees, more than 250 cooperative suppliers, and 73 distribution points around the world. Revenue in 2023 will reach $21.55 billion. With the vision of "Industry First Choice, Channel Benchmark" and adhering to the values of "Teamwork, Integrity, Professionalism and Efficiency", the company has won the "Global Distributor Excellence Award" for 24 consecutive years。 In the face of the challenges of intelligent manufacturing, WPG transformed into a data-driven enterprise, established a "big network" platform, promoted the LaaS model, committed to digital transformation, and jointly built an industrial ecosystem.
