Description
IMDC70120
5kW Bidirectional Isolated DC-DC Converter Module
20–70Vdc Battery Side ·
90–265Vdc Bus Side ·
Up to 32 Units in Parallel
|
✓ IP20
|
✓ Hot-Swap
The IMDC70120 is a bidirectional high-frequency isolated DC-DC converter module. The battery-side voltage range is 20 to 70Vdc, and the DC bus-side voltage range is 90 to 265Vdc. The module features multiple safety protections including DC reverse connection protection, and supports parallel expansion of up to 32 units.
With fully digital DSP control, the module supports charging, discharging, and automatic switching modes. It is equipped with CAN bus and RS485 communication interfaces for seamless integration with third-party devices.
The module is widely used in energy storage systems, battery formation and grading, echelon utilization, DC microgrids, and electric vehicle charging infrastructure. High-frequency isolation ensures safety and reliability across all applications.
⚡ Core Advantages — Efficient · Safe · Flexible · Reliable
High-Frequency Isolated Bidirectional Conversion
Full high-frequency isolation ensures electrical safety between battery and DC bus. Bidirectional energy flow with automatic charge/discharge switching.
Wide Voltage · High Precision
Battery side: 20–70Vdc, bus side: 90–265Vdc. Voltage/current regulation accuracy ≤ ±1%, ripple ≤ ±2%.
Powerful Parallel Expansion
Supports up to 32 modules directly in parallel with CAN/RS485 communication for current sharing and system management.
Multiple Safety Protections
Reverse connection, short-circuit, overtemperature, overvoltage/undervoltage protection. Complies with GB/T and UL standards.
🏭 Typical Applications
Energy Storage System Integration
Bidirectional DC-DC interface for low-voltage battery banks to DC bus in residential and commercial energy storage.
Battery Formation & Grading
High-precision, high-efficiency energy conversion for battery charge/discharge testing with parallel expansion for high-volume needs.
Echelon Utilization & Microgrids
Repurpose retired EV batteries for energy storage; stabilize DC bus voltage with grid/off-grid switching for islands and remote areas.
DC Microgrid & UPS
Bus voltage stabilization and backup power interface for energy dispatch among PV, storage, and loads.
EV Charging & V2G
Energy feedback from vehicle to grid, improving charging pile efficiency and enabling V2G services.
Laboratory & Test Equipment
Bidirectional DC power supply for R&D and testing, simulating battery charge/discharge characteristics.
⚡ Electrical Topology & Working Mode
IMDC70120 features a bidirectional high-frequency isolated DC-DC topology with full digital control and soft-switching technology. The module supports three operating modes: charging, discharging, and automatic switching.
⟷
HF Isolated DC/DC
⟷
Battery 20–70Vdc
|
⚡ Discharging Mode
|
🔄 Auto Switching
|
📶 32-Unit Parallel
📊 Technical Specifications — IMDC70120
| Parameter | Specification |
|---|---|
| 🌡️ Environmental Conditions | |
| Operating Temperature (TA) | -40°C to +50°C (derating above 40°C) |
| Storage Temperature | -40°C to +75°C |
| Pollution Degree | Pollution Degree III |
| Altitude | ≤ 2000m (derating above 2000m) |
| 🔌 DC Bus Characteristics | |
| Voltage Range | 90–132Vdc / 187–265Vdc |
| Rated Voltage | 110Vdc / 220Vdc |
| Max Current | 25A Max (≤18A when <185Vdc) |
| 🔋 Battery Characteristics | |
| Voltage Range | 20–33Vdc / 34–70Vdc |
| Rated Voltage | 24Vdc / 48Vdc |
| Max Current | 120A Max |
| Rated Power | 5kW |
| Voltage Regulation Accuracy | ≤ ±1% |
| Voltage Ripple | ≤ ±2% |
| Current Ripple | ≤ ±2% |
| Soft Start Time | 3s ≤ t ≤ 8s |
| No‑Load Loss | < 50W (Vbat=48Vdc, discharge mode) |
| Standby Loss | < 7W (Vbat=48Vdc, discharge mode) |
| 🛡️ Protection Characteristics (Partial) | |
| Battery Overvoltage Alarm | ≥ overvoltage setpoint – 2Vdc |
| Battery Overvoltage Alarm Recovery | < overvoltage setpoint - 4Vdc |
| Battery Overvoltage Protection | ≥ overvoltage setpoint |
| Battery Overvoltage Recovery | < overvoltage setpoint - 5Vdc |
| Battery Undervoltage Alarm | ≤ undervoltage setpoint |
| Battery Undervoltage Alarm Recovery | > undervoltage setpoint + 5Vdc |
| Battery Undervoltage Protection | ≤ undervoltage setpoint |
| Battery Undervoltage Recovery | > undervoltage setpoint + 5Vdc |
| Bus Overvoltage Protection | ≥ 300Vdc |
| Bus Overvoltage Recovery | ≤ 270Vdc |
| Bus Undervoltage Protection Recovery | Automatic alarm clear after fault shutdown |
| Reverse Connection Protection | Battery & bus reverse connection protected |
| Short-Circuit Protection | Latch-off, requires power cycle or fault clear |
| Overtemperature Protection | Auto‑recovery after temperature normalizes |
| 📋 Other Characteristics | |
| Safety Certification | GB/T 34120-2017, GB/T 34133-2017 |
| EMC Standards | GB/T 17626.5-2008, .6-2008, .4-2008 |
| Surge Protection | Common mode ±5kA (battery & bus ports) |
| Reliability (MTBF) | > 1,000,000 hrs (at 25°C) |
| Noise | < 60dB |
| Ingress Protection | IP20 |
🛡️ Protection & Safety — Full-Dimension Protection, Compliant with International Safety Standards
IMDC70120 incorporates comprehensive protection mechanisms, including overvoltage, undervoltage, overcurrent, short-circuit, reverse connection, overtemperature, surge, and insulation monitoring. All protections comply with GB/T 34120-2017, GB/T 34133-2017, UL1973, and UL9540 standards, ensuring system safety and reliability.
Battery and bus voltage monitoring with alarm and protection levels.
Hardware and software protection, latch‑off for short‑circuit.
Battery or bus reverse connection protection, requires manual restart.
Thermal monitoring with auto‑recovery, and ±5kA surge protection.
❓ Frequently Asked Questions
🔁 Does the IMDC70120 module support bidirectional energy flow?
Yes. The module is designed for bidirectional DC-DC conversion, supporting both charging and discharging modes with automatic switching, suitable for energy storage and battery testing applications.
🔗 How many modules can be paralleled at most?
Supports up to 32 modules in parallel, with CAN or RS485 communication for current sharing and system management, making capacity expansion easy.
🛡️ What protection features does the module have?
It offers overvoltage, undervoltage, overcurrent, short‑circuit, reverse connection, overtemperature, surge, and insulation monitoring. Compliant with GB/T and UL standards.
🔌 Does the module support hot‑swap?
Yes. The module supports hot‑swappable design, allowing replacement or expansion without shutting down the system, ensuring uninterrupted operation of other modules.
📡 What communication interfaces are available?
Standard CAN bus and RS485 interfaces are provided, supporting standard communication protocols for easy integration with host computers or BMS systems.
🔗 Related Products — Full Series Energy Storage Power Electronics
— 15kW–250kW · Grid/Off-Grid Switching
— 5kW–250kW · High-Frequency Isolation
— Integrated PCS + MPPT + EMS
— Cabinet / Container Type BESS
— Vehicle-to-Grid · Mobile Energy Storage
— R&D / Testing · Full-Digital DSP
— Smart Energy Distribution · Multi-Energy Complementary
— Monitoring · Scheduling · Optimization
💼 Business & Service
