The EG4 6-slot battery rack is a modular energy storage solution designed for expandable capacity, typically housing six lithium iron phosphate (LiFePO4) battery modules in a standardized 19-inch rack format. Its internal architecture integrates a centralized battery management system (BMS), individual cell monitoring circuits, and parallel/series busbars for voltage optimization. Thermal management is achieved through passive cooling channels and temperature sensors at module junctions.
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How are the battery modules configured?
Each 48V LiFePO4 module contains 15-16 prismatic cells in 15S1P configuration, delivering 51.2V nominal. Modules connect via hot-swappable power terminals supporting 5000+ cycles at 0.5C discharge rates. Pro Tip: Always verify module voltage alignment before rack installation to prevent reverse polarity damage.
Internally, the rack employs a master-slave BMS topology where the central controller coordinates six slave BMS units—one per module. This hierarchy enables cell-level voltage monitoring (±25mV accuracy) and state-of-charge synchronization across modules. The busbar system uses 35mm² tinned copper with 200A continuous rating, minimizing voltage drop during high-current operations. For example, a fully loaded rack with six 5kWh modules achieves 30kWh capacity while maintaining <85°C at terminals under 100A load.
What safety mechanisms are implemented?
The rack features four-layer protection—module-level fuses, rack-level circuit breakers, arc fault detection, and emergency disconnect. Its IP20-rated enclosure prevents accidental contact with live parts while allowing convection cooling.
| Protection Type | Trigger Threshold | Response Time |
|---|---|---|
| Overcurrent | 150% rated current | <500ms |
| Overvoltage | 58.4V per module | <100ms |
Redundant CAN bus communication between modules and BMS ensures fail-safe operation. During a ground fault scenario, the isolation monitoring system can detect >500Ω leakage resistance and initiate shutdown within 2 seconds.
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FAQs
No—the BMS requires identical module specifications. Mixing 100Ah and 200Ah modules causes improper charge distribution and BMS fault codes.
Does the rack support outdoor installation?
Only in NEMA 3R enclosures—the base IP20 rating lacks moisture protection. Condensation exceeding 85% RH risks terminal corrosion.
