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Over Voltage Protection The battery charging system includes over voltage <br />protection in the form of components on BMS: <br />(according to OVC Class II in UL/IEC62368),which <br />limit the voltage input to the rectifier and battery <br />charging system.The rectifier which charges the <br />battery is listed to UL/IEC62368 and is compatible <br />with the battery chemistry.Battery charge voltage is <br />controlled by the BMS to maintain battery charge <br />voltage in its normal operating range as tested in <br />UL1973. <br />Water Intrusion Protection The Ericsson Energy Storage System 6160 including <br />the Ericsson Enclosure B160 cabinet are well sealed. <br />The cabinets utilize gaskets around the access doors. <br />They have been tested to meet GR-487 rain intrusion <br />and wind-driven rain requirements which allow <br />negligible water intrusion during events of 75 MPH <br />wind driven rain.The cabinets are inspected for water <br />intrusion when serviced. <br />The B160 cabinet and telecommunications cellular <br />sites are normally located outside of or above known <br />flood zones. <br />Battery 6618 has been tested in submerged state by <br />supplier and Ericsson in both fresh and salt water and <br />no hazard in form of explosion or fire will occur. <br />Outgassing will occur.When the charge current returns, <br />nothing hazardous will occur. <br />Earthquake Protection The Ericsson Energy Storage System 6160 including <br />the Enclosure B160,and associated hardware have <br />been tested and found to conform to telecom <br />earthquake requirements of GR-487 and GR-63.These <br />requirements preclude structural or mechanical <br />damage following severe earthquake events.These <br />prevent the battery system from being damaged or <br />dislocated during earthquakes thereby preventing <br />short-circuits and other hazardous results. <br />CONSEQUENCE BARRIERS <br />Cascading Thermal Runaway <br />Limitation <br />Cell and module designs prevent cascading thermal <br />runaway beyond the initiating module as <br />demonstrated in UL 9540A testing. <br />Fire Detection A smoke detector is included in the B160 cabinet.In <br />the event of a fire within the battery or other cabinet <br />electronics the detector will send an alarm signal to a <br />Confidentiality Class External Confidentiality Label Document Type Page <br />Ericsson Internal Analysis 18 (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