ZheJiang XingHai Energy Technology Co., Ltd. 浙江兴海能源科技有限公司. UPS-48v 50Ah. Specification. Producer Auditor Approved by.

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1 Pages: 1 / 12 UPS-48v 50Ah Specification Product name: Uninterruptible Power Supply Product model: Battery model: NE-48D50-NP 48V50Ah Edit date: Producer Auditor Approved by Customer Approved Dept Signature Date Add.: Tai Hu Road, Changxing Eco.&Tech. Development Zone, Changxing County, Zhejiang Province, China Postal code: Tel: Fax:

2 Pages: 2 / 12 Changing record Version Before Description After Signature Date

3 Pages: 3 / Description This product is a communication base station energy storage using lithium iron phosphate battery, by 16 pieces of 50Ah batteries in series. The internal structure of battery adopted scientific design, advanced battery production technology, with high advanced energy, long life, safe and reliable, using temperature scope width features, so it is the ideal green energy storage power supply products for telecommunication industry. 1.1 Naming conventions 2.Product s function introduction 2.1 protective function: Over-voltage protection Total voltage detected battery pack voltage achieved previous set value and time to reach the set value, protection is triggered, charging MOSFET will be shut off, after the protection if the battery voltage restore to the previous values or discharge current is detected, the protection will be released.

4 Pages: 4 / Cells over-voltage protection When any series of cells of voltage achieved previous set value, and time reaches the set value, protection is triggered, charging MOSFET is shut off, after the protection if the battery voltage restore to the previous values or discharge current is detected, the protection will be released Charging over-current protection When current achieved previous set value, and time reaches the set value, protection is triggered, charging MOSFET is shut off, after the protection if the battery voltage restore to the previous values or discharge current is detected, the protection will be released Battery pack low voltage protection When total voltage current achieved previous set value, and time reaches the set value, protection is triggered, charging MOSFET is shut off, after the protection if the battery voltage restore to the previous values or discharge current is detected, the protection will be released Cells low voltage protection When any series of cells' voltage is less than previous set value during discharging detection, and time reaches the set value, protection is triggered, charging MOSFET is shut off, after the protection if the battery voltage restore to the previous values or discharge current is detected, the protection will be released Over-current protection during charging When current is higher than previous set value during charging, and time reaches the set value, protection is triggered, charging MOSFET is shut off, after the protection if the battery voltage restore to the previous values or discharge current is detected, the protection will be released Temperature protection When temperature is higher than previous set value during working, and time reaches the set value, protection is triggered, charging MOSFET is shut off, after the protection if the battery voltage restore to the previous values or discharge current is detected, the protection will be released Short circuit protection When current achieved previous set short circuit value during discharging, and time reaches the set value, protection is triggered, charging MOSFET is shut off, after the protection if the battery voltage restore to the previous values or discharge current is detected, the protection will be released.

5 Pages: 5 / RS232 communication BMS can communicate with PC through RS232 interface, thus watch all kinds of information of the battery. 2.3 RS485 communication When batteries are paralleled,bms can communicate with PC through RS4585 interface, thus watch all kinds of information of the battery. 2.4 Balancing function Because each cell internal chemical character, self-discharge, and the influence of temperature will change each batteries, there will be a certain difference between each batteries, the performance is the voltage difference, the imbalance between the batteries. So that a single cell degradation will affect the whole battery pack. We use the BMS with batteries balancing function, when a series of batteries voltage has reached the balance set value during charging, and battery voltage differential between the section and minimum section to balance the opening differential pressure of the previous set value, BMS open balance function, to bypass shunt of high voltage of battery, so as to realize effective for red jersey light balance, to enhance the overall capacity of the battery, prolong the service life of the battery pack. 2.5 Alarm function When the battery pack fails, the red LED light is on, technical staff will resolve the defective items. 2.6 LED display

6 Pages: 6 / Hardware address switch In parallel communication protection board needs to configure the hardware address, And hardware address can be set up by dial position switch board. 3. Battery specification Items Parameter Remark Nominal voltage(v) 48.0(16 series) Nominal capacity(ah) 50.0 Standard charge and discharge Charging voltage(v) 57.6±0.2 adjustable Single cell over-charge protection(v) 3.8±0.05 adjustable Standard charging current(a) 10±1 recommended value Max. charging current(a) 50±1 adjustable Charging over-current protection(a) 100±1 adjustable Charging over-current protection(ms) 500 adjustable Discharge end-off voltage(v) 43.2±0.2 adjustable Single cell over-discharge protective voltage(v) 2.5±0.05 adjustable Standard discharging current(a) 25±1 recommended value Max. continuous discharge current(a) 50±1 adjustable Discharge over-current protection(a) 70±1 adjustable Discharge over-current protection delay time(ms) Internal resistance(mω ) 50 adjustable 60 Between discharge port anode and cathode Dimension(mm) (430*460*132)±1 Exc. Connectors and handles Cycle life(2000 times) >40Ah Weight(kg) 33.0±0.5 Inc. case Working temperature range ( ) -20~65 Storage temperature range ( ) -20~75 Storage terperature humidity(rh) 5%~95% Working humidity(rh) 85%

7 Pages: 7 / Testing condition, method and character 4.1 Testing condition Unless specified, all tests is in the temperature of 15 ~ 35, humidity 25% ~ 85%, atmospheric pressure 86 kpa to 106 kpa environment. 4.2 measuring instrument dc voltmeter for measuring voltage precision is not lower than 0.5 on the Richter scale, Ω voltmeter internal resistance not less than 1 k/v; current is measured in dc electric meter accuracy is not lower than 0.5 on the Richter scale; Holdings measuring temperature with a thermometer should have appropriate range, the index value should not be greater than 1 ; timer should be on time for measuring time, minutes and seconds dividing, should at least have the accuracy of + / - 1%. 4.3 Standard charge Use DC regulated power supply(switching power supply) voltage 57.6 V, current 0.2 C (A) constant current charge to the current 0.1 A. 4.4 Standard discharge Charge by (4.3) method, use electronic load to discharge with 0.5 C (A) current electric constant until the total voltage is below 43.2 V. 4.5 Battery capacity Discharge by (4.4) method, record the discharge time (h) and capacity (Ah) = current (A) (h) * discharge time. 4.6 Character Testing items Testing method Standard Normal temperature High temperature After the battery charging standard as stipulated in the 4.3, put aside 2 h under room temperature , and then discharge according to provisions of 4.4 under temperature After the battery charging standard as stipulated in the 4.3, shelved under high temperature and for 2 h, then according to provisions of 4.4 under the temperature of discharge No fire, no explode, and the discharging time is no less than 240min No fire, no explode, and the discharging time is no less than 240min

8 Pages: 8 / 12 Low temperature Charge Retention Rate-discharge character Cycle life 4.7 Temperature test After the battery charging standard as stipulated in the 4.3, low was put on hold 2 h, then according to provisions of 4.4 under the temperature of discharge After the battery charging standard as stipulated in the 4.3, room temperature 20 + / - 5 for 30 d, then according to provisions of 4.4 under the temperature of discharge After the battery charging standard as stipulated in the 4.3, normal temperature on 10 min, with 1 c discharge current, the voltage of 45 v, record the discharge capacity Battery under the condition of , battery charging standard as stipulated in the 4.3, for 5 min and then discharge to termination conditions, as stipulated in the 4.4 in this cycle. Once every 25 cycle according to the standard charge and discharge test battery capacity, when the capacity is less than 80% of the rated capacity terminate the test No fire, no explode, and the discharging time is no less than 150min Charge Retention 95% Discharge capacity 95% 2000 times Testing items Testing method Standard Constant temperature constant thermal experiments Temperature shock Of charging as stipulated in the 4.3 after the completion of the battery pack, in the environment temperature of , relative humidity 90 ~ 95% under the condition of open shelving 48 hours later, back to the temperature of , relative humidity 25% ~ 85%, to 4.4 standard discharge. Battery charging is completed, according to provisions of 4.3 open circuit in temperature in the box 1) since , keep low temperature 120 min; 2) and then with 10 / min to heat up to ; 3) keep high temperature for 120 min; 4) cooled to - 40 to 10 / min plus or minus 2 Repeat four times, four times a complete cycle back to room temperature after take out battery, under the The battery pack has no obvious deformation, rust, smoke, or explosion;discharge capacity is greater than 80% of the rated capacity. Lithium battery, no deformation, crack and leakage phenomenon; Open circuit voltage and load capacitance are conform to the requirements of the product specification, and still can be normal charging and discharging.

9 Pages: 9 / Safety test condition of 25 let stand 120 min, the li-ion battery at room temperature. Testing items Testing method Standard Extrusion test Prick test Short circuit test Drop test The overcharge test Discharge test Battery charging is completed, according to provisions of 4.3 in between the two extrusion surface of extrusion equipment, gradually increase the pressure to 13 n, holding time 1 min. According to provisions of 4.3 charged the battery pack, place the thermocouple in the battery pack, with Ф 5 stainless steel needle penetration at a speed of mm/s a set of the center of the battery. Discharge battery pack according to 4.3, at 20 under the condition of + 5 for 1 h.the battery via external short circuit for 10 min, external line resistance < 10 m Ω. Charging battery pack according to 4.3, under the condition of shelved after 1 h, under the condition of , from 1.5 meters high drop to the wood. Remove the protection plate, ambient temperature, with 10 a / 75 v constant current constant voltage source for lithium battery charging continuously, until there is a single battery voltage is higher than 5 v. Remove protection board, under the condition of , the battery pack with 0.5 C (A) discharge current and voltage at 0 v. Battery no explosion, no burning Battery no explosion, no burning Battery no explosion, no burning, no leakage Battery no explosion, no burning, no leakage Battery no explosion, no burning, no leakage Battery no explosion, no burning, no leakage

10 Pages: 10 / 12 5.Discharge curves 6. BMS structure 6.1 BMS connection diagram

11 Pages: 11 / 12 Four connectors are as below by following the above hint of picture: CON1: NTC1+,NTC1-,CELL1-,CELL1,CELL2,CELL3,CELL4, CON2: NTC2+,NTC2-,CELL5,CELL6,CELL7,CELL8, CON6: NTC3+,NTC3-,CELL8,CELL9,CELL10,CELL11,CELL12, CON7: NTC4+,NTC4-,CELL13,CELL14,CELL15,CELL16 And CELL16 is B+ terminial cell,cell1- is B- terminal cell. 6.2 Picture and defination 1. The SOC (State of charge) : charged State. Reflect the remaining capacity of the battery, its value is defined as the ratio of residual capacity of battery capacity. 2. ALM: the alarm indicator. 3. RUN: running lights. 4. ADD: code dial device

12 Pages: 12 / RS232: computer communication interface 6. RS485: computer networking communication interface 7. Terminal: single row four terminals 7. Matters need attention. 7.1 Don t put the battery near the origin of heat, such as fire, heater etc. 7.2 Please use the matched charger to charge the battery. 7.3 Don t convert the anode and cathode. 7.4 There are safety features in the battery, in order to keep safe, do not dissect or change the structure of the battery. 7.5 It is forbidden to connect the anode and cathode directly with metal. 7.6 It is forbidden to pound, throw, trample the batteries. 7.7 It is forbidden to put the battery into the water, or in the moisture place. 7.8 If the battery are stored without being used for 6 months, we recommend the batteries fully charged before using them. 8.Shelf life 8.1 The shelf life is 24 months since the production time. 8.2 Our company is not responsible for quality inferiority or accidents caused by abuse operating or using which are not compliant with the specifications and instructions. 9.Transportation During the transportation, prevent battery from the strenuous vibration, impact, exposed to the sun and rain, and keep the battery on a state of half-charged.