Telecom Site Lithium-Ion Battery (LiFePO4) Thermal Runaway Prevention – Official Technical Overview & Hardware Datasheet

EXECUTIVE SUMMARY

The Telecom Site Lithium-Ion Battery (LiFePO4) Thermal Runaway Prevention solution is a carrier-grade energy storage platform engineered specifically for outdoor and indoor telecom sites requiring uncompromising safety, reliability, and longevity. Unlike conventional lithium-ion chemistries, this LiFePO4 (Lithium Iron Phosphate) battery system integrates a multi-layered thermal runaway prevention architecture that combines intrinsically safe cell chemistry, advanced Battery Management System (BMS) firmware, and proprietary passive/active containment hardware. The platform delivers 48 VDC nominal output with scalable capacity from 100 Ah to 400 Ah per string, supporting high-availability telecom loads such as 5G RRUs, edge compute nodes, and optical transport equipment. This datasheet provides a comprehensive technical overview of the hardware, safety mechanisms, compliance standards, and deployment options for network operators seeking to future-proof their site power infrastructure while mitigating fire and explosion risks associated with lithium-ion deployments.

ARCHITECTURE & CHASSIS DESIGN

The system is housed in a ruggedized, IP65-rated outdoor enclosure or a 3U/4U rack-mountable chassis for indoor applications. The chassis is constructed from galvanized steel with a flame-retardant powder coating (UL94 V-0) and includes dedicated thermal isolation compartments between cell modules. Each battery module contains 16 LiFePO4 prismatic cells (3.2 V, 100 Ah) configured in a 16S1P arrangement, delivering 51.2 V nominal and 5.12 kWh per module. The modules are interconnected via a front-access busbar system with torque-limited terminals and integrated cell-level fusing. A central Battery Management Unit (BMU) communicates with each module over an isolated CAN bus (500 kbps) and controls the thermal runaway prevention subsystem, which includes: (1) cell-level pressure and temperature sensors sampled at 100 Hz; (2) a passive thermal barrier of aerogel insulation between cell groups; (3) an active venting mechanism with pressure relief valves and a non-toxic aerosol suppression cartridge; and (4) a solid-state disconnect relay that isolates the string within 5 ms of detecting an abnormal condition. The chassis also features a dedicated smoke/gas sensor (CO and VOC) and an emergency stop button for manual isolation.

HARDWARE FEATURES

– Intrinsically safe LiFePO4 chemistry with olivine structure and high thermal stability (decomposition temperature > 270°C).
– Multi-stage thermal runaway detection: cell voltage delta (ΔV > 50 mV), temperature rate-of-rise (> 3°C/min), pressure rise (> 10 kPa), and smoke/gas detection.
– Active suppression: aerosol cartridges (per module) with automatic activation upon detection, plus passive aerogel barriers to delay propagation.
– Redundant BMS architecture: primary BMU plus a secondary independent safety controller (SIL-2 rated) that can force-open the main contactor.
– Cell balancing: passive balancing (100 mA) with adaptive algorithm to prevent overcharge-induced heating.
– Communication interfaces: CAN 2.0B, RS-485 (Modbus RTU), and dry-contact alarms for integration with site controllers (SCADA/EMS).
– Remote monitoring: SNMP v3 and web GUI via optional Ethernet module for real-time thermal runaway risk scoring.
– Operating temperature range: -20°C to +60°C (discharge), 0°C to +45°C (charge) with derating above +45°C.
– Cycle life: > 6,000 cycles at 80% DoD, 25°C, to 80% capacity retention.
– Self-discharge: Parameter Specification

Form Factor Outdoor IP65 cabinet (100/200 Ah) or 4U rack-mount (400 Ah) Nominal Voltage 51.2 VDC (16S LiFePO4) Capacity Range 100 Ah to 400 Ah per string Energy per Module 5.12 kWh (100 Ah, 51.2 V) Max Continuous Discharge 100 A per string (1C) Max Continuous Charge 50 A per string (0.5C) Operating Temperature -20°C to +60°C (discharge); 0°C to +45°C (charge) Thermal Runaway Detection Cell voltage delta, temperature rate-of-rise, pressure, smoke/gas Suppression Activation Time Main Contactor Isolation Time Communication Interfaces CAN 2.0B, RS-485 (Modbus RTU), dry contacts; optional Ethernet (SNMP v3) Cycle Life > 6,000 cycles at 80% DoD, 25°C, to 80% capacity Self-Discharge Safety Certifications IEC 62619, UL 1973, UL 9540A, UN 38.3 EMC Compliance EN 55032 Class A, EN 55035, FCC Part 15 Subpart B Ingress Protection IP65 (outdoor models)

ORDERING OPTIONS

Available configurations:
– TSLB-100-48: 100 Ah (5.12 kWh) single-string outdoor cabinet, includes aerosol suppression and BMU.
– TSLB-200-48: 200 Ah (10.24 kWh) dual-string outdoor cabinet with redundant BMU.
– TSLB-400-48: 400 Ah (20.48 kWh) four-string rack-mount chassis (4U), includes active venting and secondary safety controller.
– TSLB-100-48-NS: 100 Ah module without suppression (for integration into existing cabinets with third-party suppression).
– Accessories: Ethernet monitoring module (TSLB-ETH), spare aerosol cartridge (TSLB-AER-01), aerogel barrier kit (TSLB-AER-BAR).

All models include a 5-year limited warranty with optional extension to 10 years.