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Battery Management Systems <br />(BMS) <br />BMS provides supervisory actions and isolation / <br />protective actions when Short Circuit occurs.Then an <br />alarm will be raised at NOC from BMS via the C6610.The <br />battery will be isolated from operation. <br />Over Current Protection – <br />Electrical <br />The battery charging system includes over current <br />protection in the form of BMS Control/MOSFET/Circuit <br />Breaker,which limits the charging current to the battery. <br />The battery discharge current is limited by BMS <br />Control/MOSFET/Circuit Breaker,which limits the current <br />drain and load current in the event of a short-circuit or <br />overload of the battery.In this manner,the battery is <br />kept in its normal operating range. <br />Over Current Protection – <br />Mechanical <br />The likelihood of short-circuits on the output of the <br />battery are reduced through mechanical design and <br />construction using wire routing away from sharp and <br />moving parts.Grommets and abrasion protection are <br />used to protect cable insulation where cables pass <br />between chassis and enclosures as noted in the product <br />listing. <br />Cell Electrical Abuse Tolerance Cell tested and certified to UL 1973.Cells and modules <br />were tested to UL 9540A and did not propagate fire <br />outside the initiating module. <br />CONSEQUENCE BARRIERS <br />Cascading Thermal Runaway <br />Limitation <br />Cell and module designs prevent cascading thermal <br />runaway beyond the initiating module as demonstrated <br />in UL 9540A testing. <br />Fire Detection A smoke detector is included in the B160 cabinet.In the <br />event of a fire within the battery or other electronics the <br />detector will send an alarm signal to a remote 24/7 <br />Network Operations Center (NOC),alerting the system <br />owner of a potential fire within the enclosure. <br />Deflagration Protection UL 9540A testing has demonstrated that generation of <br />a combustible mixture of vented gasses is not likely in <br />accordance with NFPA68/69.The B160 enclosure <br />contains a panel of pressure relief valves and fans to <br />release vented gas pressure in the event of venting of a <br />cell or cells. <br />Emergency Response Plan <br />Training <br />In many cases,an Emergency Response Plan will be in <br />place to provide direction to building personnel or <br />responders on how to safely evacuate a site in the event <br />of a thermal runaway event.To be added by customer. <br />Fire Service Response In the event of fire,fire service response is beneficial. <br />As the installation locations of cellular communications <br />Confidentiality Class External Confidentiality Label Document Type Page <br />Ericsson Internal Analysis 25 (27) <br />Prepared By (Subject Responsible)Approved By (Document Responsible)Checked <br />ERATLEN Thomas Lennholm <br />Document Number Revision Date Reference <br />1785-BFM 107 220/1 Uen PA2 2025-06-03