Bicker Elektronik GmbH Ludwig-Auer-Straße 23 | 86609 Donauwörth | Germany

Legend of used symbols Symbol Description Attention! Important hazard warning. Attention! Avertissement de danger important. Do not dispose of in the domestic waste. Ne pas jeter avec les ordures ménagères. Warning of electrical voltage. Avertissement de tension électrique. Battery intended for recycling. Batterie destinée au recyclage. Revision Directory Date Initial version Release version

System present function Integrated temperature sensor Very high storage capability Ideal for long backup time 100% lead and cadmium free 5x higher life span than lead-acid batteries UN 38.3 transport certification Safe lithium iron phosphate technology Extended temperature range -20…+55 °C Compact and reliable design B  Safety instructions B1  General information The safety instructions must be read completely before the first time use! In addition, please regard the corresponding data sheet for safety use. Incorrect operation or connection may result in serious injury or death. Exagerating the...

B2  Safety warnings for battery use The described limit values of the battery module must be observed. A violation of the limit values can cause excessive heating, a defect in the battery module or fire. As with other batteries, lithium batteries also have the potential to continue being a source of danger even in the supposedly discharged state, as they can deliver a very high short-circuit current. Too deep discharge leads to permanent damage. Deeply discharged battery modules may no longer be charged or operated. For example, deep discharge can occur when stored for a long time without operation....

If a cell leaks, the fluid must not come into contact with the skin or enter the eyes or mouth. Measures in case of inhalation Vapors or mists escaping from a damaged cell can cause respiratory irritation. When inhaling the contents of an open cell, remove the source of contamination or remove the affected person to fresh air. Seek medical help immediately. Measures in case of eye contact Contact with the contents of an opened cell can cause severe chemical burns or eye irritation. If eye contact occurs with the contents of an opened cell, immediately rinse the contaminated eye(s) with a lukewarm,...

C  Connections of battery system POWER SUPPLY 2x Red (Plus): AWG 18 2x Black (Minus): AWG 18 Cable length 35 cm ±10 mm Plug: WST (WELI SHENG TERMINAL), P/N: P4-I42002 COMMUNICATION AWG 24 Cable length 35 cm ±10 mm Plug: Würth Elektronik, P/N: 624008213322 internal (do not use) NTC-Pin 2 internal (do not use)

D  Technical data BP-LFP-13250S ELECTRICAL DATA Cell type Nominal capacity Nominal voltage Voltage range Corepack Overvoltage switch-off Once first cell reaches 3.7  V Overvoltage switch-off Recovery Undervoltage switch-off Once first cell reaches 2.5  V Undervoltage switch-off Recovery Fuse Own power consumption 15 A State of storage: max. 15 µA Activated state: max. 500 µA 5000 m Maximum installation height CHARGING PARAMETERS Recommended end-of-charge voltage Charging mode Recommended charging current Maximum charge current Operating temperature range Shutdown temperature range -20…+55 °C...

TEMPERATURE SENSOR Type Outer wall of a middle cell HUMIDITY Operating MECHANICAL DATA Length 184.5 mm (without female adapters) STORAGE Recommended temperature range Maximum temperature range Recommended State of Charge (SOC) MECHANICAL DIMENSIONS Unless otherwise stated, Tolerance according to: DIN ISO 2768 T1 - m DIN ISO 276

Backup time* (in use with a UPSI-2406(D)) *Backup time depends on battery capacitance, load and temperature. At very high or low temperatures a reduction of backup time occurs. Unless otherwise specified, the values apply to measurements at +25 °C

n.a. (available upon request) n.a. (available upon request) E  Functionality of BMS If the BMS is in ACTIVE MODE, the single cell voltages of the energy storage are monitored cyclically by battery management system for compliance with the limits. In the event of a fault, the battery system disconnects the main current path. Charging and discharging is only possible with an activated battery management system E1  Protection functions The BMS has several possibilities for detecting fault conditions. The following is a basic breakdown into shortterm, reversible and permanent errors: If a short-term,...

E2  Charging behaviour The charging behaviour depends on the procedure described in chapter 'Charging process'. For this purpose, a suitable charger should be used. Abbreviation Description / Condition Charge Term Taper Current Current at end of charge CUV_RECOV_CHG After discharge, the output voltage remains deactivated until a loading process has taken place. Comments Limit Current <200 mA Function is activated The charging process is finished when the current has dropped below the value of the Charge Term Taper Current. Charging an empty battery system If a single cell falls below a voltage...

E5  Discharging process During discharge process, the pack voltage drops from the end-of-charge voltage (100  SOC) to end-of% discharge voltage (0  SOC). Depending on current, the remaining capacity decreases continuously. If the % battery management system detects an error, it will be shut down as described in Section 'Functionality of BMS'. E6  Charging process Before using the charger for the first time, it is essential to read the operating instructions for the charger used! Recommended charging unit UPSI-2406. General information The charging process takes place according to the CC-CV procedure....

NTC temperature sensor The evaluation of the NTC temperature sensor (PIN 1 and 3 of the communication connector) is also mandatory for the use of the battery. The temperature sensor is attached directly to the outer wall of a cell and thus measures the cell temperature directly. The cell temperature must never leave the given limit values, otherwise there is a risk of fire and explosion. Allowed temperature range for the built-in cell TB-027070180D-Fe-25Ah: Charge: -20 °C up to +55 °C Discahrge: -20 °C up to +55 °C The resistance of the NTC can be measured between PIN 1 and 3 of the communication...