FGI has successfully addressed the difficult startup issue for flow battery energy storage systems. They did this by providing a customized 100kW DC/DC converter and a 630kW bidirectional inverter that work together for a client in Singapore. As a "technological pioneer" in core equipment for flow batteries, FGI's DC/DC module ensures the smooth implementation and operation of the client's flow battery project thanks to its 0V disturbance-free startup technology.
Key Technical Features of FGI's 100kW DC/DC Module
Addressing industry pain points, FGI independently developed its 100kW DC/DC module specifically for flow batteries. Its core competitive advantages lie in high precision, high reliability, and intelligence, providing a comprehensive solution for the Singapore project.
1. Wide Voltage Dynamic Matching Technology
The low voltage side spans 0-850V (0-±275A), and the high voltage side covers 50-900V. This perfectly adapts to the wide voltage fluctuation characteristics of various flow battery types, including all-vanadium and iron-chromium batteries.
Utilizing Silicon Carbide (SiC) devices and a 6-phase interleaved parallel technology, it achieves a full-load efficiency of 99.5%, which is leading in the industry.
2. Intelligent 0V Impact-Free Activation
Through pre-charge detection and a stepped boost algorithm, it enables smooth startup of flow batteries from a 0V state. This prevents electrolyte backflow and electrode damage, extending battery life by over 20%.
It eliminates the need for additional pre-charge circuit designs, saving approximately 15% in hardware costs per module.
3. Modular Redundant Design
Supports multi-module parallel operation, with single-unit power covering 50-100kW, and the system can be expanded to the megawatt (MW) level.
In case any module fails, the system automatically switches to a backup unit, ensuring continuous operation.
DC/DC Technology Driving Flow Battery Industry Development
As flow battery costs continue to decline (expected to drop below 1.5 CNY/Wh by 2025), the efficiency and intelligence of DC/DC modules will become a key focus for industry competition.
Through deep coupling of DC/DC and PCS (Power Conversion System), it can directly drive DC loads, reducing conversion losses in supporting power supplies like photovoltaic systems.
AI power prediction algorithms enable self-optimization of the DC/DC module's charge and discharge strategies.
FGI's 100kW DC/DC Module Technology
FGI has specialized in power electronics for over 30 years, covering applications such as flow batteries, hydrogen energy, and rail transit.
Core Advantages:
Mastering key technologies including topology design, thermal simulation, and intelligent control.
Passed 67 reliability tests, including salt spray, vibration, and high/low-temperature cycling.
Supports fast customized design and development, and provides lifetime operation and maintenance services.
100kW Bidirectional DC Converter Technical Parameters
| Time |
Category |
100kW Bidirectional DC Converter |
|
Electrical Parameters
|
Low Voltage Side / V
|
0~850V (Current range 0A~±275A)
|
|
High Voltage Side / V
|
50V~900V
(Rated voltage 700V, Rated current 143A)
|
|
Rated Power / kW
|
100
|
|
Overload Capability
|
110% of rated current, long-term
|
|
Low Voltage Rated Current / A
|
200 (max@275A)
|
|
High Voltage Rated Current / A
|
143
|
|
Voltage Control Accuracy
|
1%
|
|
Current Control Accuracy
|
1%
|
|
Maximum Efficiency
|
99.5%
|
|
Current Ripple RMS
|
≤2%
|
|
MPPT Function
|
Yes
|
|
Other Parameters
|
Dimensions / mm (WDH)
|
560*570*185mm
|
|
Weight / kg
|
<50
|
|
Communication Interfaces
|
3x 485 communication, 2x CAN communication, 1x Ethernet interface
|
|
Input/Output Interfaces
|
4 inputs, 4 outputs
|
|
Protection Level
|
IP20
|
|
Structure Wiring
|
Front entry, front exit
|
Production Base: Jincheng Road, Economic Development Zone, Wenshang County, Jining City, Shandong Province, China
Email: overseas@fengguang.com
Website: www.fengguang.com
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