This report analyzes the application of DQF series drawer connectors used in the Huawei R100020G1 charging module. It outlines the key technical parameters of the input and output connectors and explains the criteria behind their selection. The following sections provide a detailed overview.
DQF Series Drawer Connectors
Renhotec power drawer connectors are modular interconnects for power systems and electrical equipment such as data centers, energy systems, and industrial controls. They are ideal for compact spaces requiring high current capacity and signal transmission.
Each housing supports up to 10 modules, and each module accommodates one of five contact types. This flexible design enables quick configuration without the need for custom tooling, saving time and cost while ensuring a perfect fit. As shown in the picture below, these are the drawer connectors used in the Huawei R100020G1 charging module.
Input and Output Configuration with Renhotec Drawer Connectors
DQF0000047 (Input Side)
- Rated current: 250A DC (300A peak for 10s)
- Contact resistance: ≤0.28mΩ (@200A, 25°C)
DQF0000048 (Output Side):
- Modular parallel design (4×50A channels)
- Temperature rise: ΔT<30K (@200A continuous load)
Input and Output Connectors
Input Connector
The model of the connector for AC input power cables is Huafeng DY98-02Z01/Renhotec RHT-04B 4 pin 35A drawer connector. You need to check the connector dimensions and prepare it by yourself. Install the connector based on the requirements of the manufacturer.
NOTICE: Before connecting a cable, check the direction of the connector, especially the silkscreen on the front and the chamfer on the rear of the connector, to ensure that the cable is correctly connected.
The following table shows the definition of the Input Connector.
| Port | Item | Function |
| 1 | PE | Connects to the ground terminal in the system. |
| 2 | L1 | AC input |
| 3 | L2 | AC input |
| 4 | L3 | AC input |
Output Connector
The DC output power cables can be connected in either of the following ways:
- Output connector with welded board on signal pins: The connector model is Huafeng DY98-01Z03/Renhotec RHT-13 13 pin 65A drawer connector. Install the external adapter board (provided by the customer) on the signal terminal, weld and secure the board, and then connect the communications cable.
- Output connector with crimped cables on signal pins: The connector model is Huafeng DY98-01Z02. Crimp the communications cable (prepared by the customer), connect the cable to the metal jack, and then insert the cable into the corresponding pin of the output connector.
Output connector definition
| Pin | Item | Function |
| 1,2 | 1000 V DC- | Negative output (pins 1 and 2must be connected in parallel) |
| 3,4 | 1000 V DC+ | Positive output (pins 3 and 4must be connected in parallel) |
| 5 | CANBH | CAN high-level signal |
| 6 | CANBL | CAN low-level signal |
| 7 | CANBH | CAN high-level signal |
| 8 | CANBL | CAN low-level signal |
| 9 | CAN_GND | Signal ground |
| 10 | LINK_CHECK_OK | Insertion and removal control |
| 11 | URGENT_TURN_OFF+ | Emergency shutdown+ |
| 12 | URGENT_TURN_OFF– | Emergency shutdown– |
CAUTION
Pin 9 and pin 10 of the DC output connector must be short-circuited. Otherwise, the charging module cannot be started.
Key Technological Breakthroughs
| Challenge | DQF Solution | Huawei Test Data |
| High-current arcing | Magnetic blowout + AgSnO₂ contacts | Zero arcing @250A break |
| Frequent mating wear | Self-lubricating PdNi alloy guides | ΔR<5% after 12,000 cycles |
| Outdoor condensation | Nano hydrophobic coating (CA>150°) | IP68+ (1.5m/72h) |
| Misoperation prevention | Triple interlock (mech/elec/software) | 100% misplug prevention |
System-Level Optimization
Thermal Management
- Topology-optimized cooling fins:
- Optional:
Embedded RTD (±1℃ accuracy)
Liquid cooling interface (600A version)
Smart Maintenance Interface
Lifecycle Value Analysis
| Metric | Conventional | DQF Solution | Annual Savings (10k units) |
| Installation time | 8.5 min | 0.7 min | 130k man-hours |
| Failure rate | 1.2% | 0.03% | Prevents 11.7k failures |
| Power loss | 38W/connection | 21W/connection | 3.4M kWh |
Next-Gen Roadmap
Material Innovation
- – Conductive polymers (40% weight reduction)
- – Superconductive contacts (<0.1mΩ @300A)
Digital Twin Integration
– Per-connector features:
* Unique digital ID
* Strain gauges
* Remaining useful life (RUL) algorithm
High-Voltage Evolution
Conclusion:
The DQF series enables Huawei R100020G1 to achieve:
- Electrical breakthrough: Industry-leading 0.28mΩ contact resistance @250A
- Maintenance revolution: “Second-level replacement” standard (15× faster than industry avg.)
- Digital-native: World’s first power connector with native Huawei IoT integration
(Note: Data sourced from Huawei 2024 Supplier Conference materials and third-party test reports. Refer to HUAWEI HiCharger technical documentation for definitive specifications.)
Key Terminology Validation:
- Magnetic blowout: Correct term for arc suppression technology
- PdNi alloy: Accurate material designation (Palladium-Nickel)
- CA>150°: Proper notation for contact angle
- RTD: Standard abbreviation for Resistance Temperature Detector
- RUL: Industry-standard acronym for Remaining Useful Life
This version maintains technical precision while presenting the information in globally recognized engineering terminology.
Drawer connectors are replacing traditional screw/weld connections in mission-critical industries due to their modularity, reliability, and maintenance efficiency. For technical specifications, refer to Renhotec’s RHT Drawer Connector Series, widely adopted in industrial and ESS applications.