2. Subsystems

2 1 lithium iron phosphate battery specifications item specs remarks nominal capacity 314ah 0 5p standard discharge,25±2℃ nominal energy 1,004 8 nominal power 502 4w 0 5p operation voltage 2 5 3 65v 2 0 3 65v cell temperature t>0℃cell temperature t≤0℃ delivery capacity 3% 40% soc within 10days form factory delivery voltage 2 9 3 40v standard charge method 0 5p constant power charge to 3 65v 25±2℃ standard discharge method 0 5p constant power discharge to 2 5v cell internal impedance 0 18±0 05mω fresh cell, intimal resistance measured at ac 1khz weight 5 60±0 30kg max continuous charge power 1p 2 5 3 65v,25±2℃,1p=896w max continuous discharge power 1p charge 0 60℃ p rate 0 5℃ ≤0 12p 5 10℃ ≤0 3p 10 15℃ ≤0 5p 15 55℃ ≤0 5p 55 60℃ ≤0 5p discharge 20 60℃ p rate 30 20℃ ≤0 5p 20 55℃ ≤0 5p 55 60℃ ≤0 5p operation humidity range ＜70% rh no condensation altitude ≤4000m(pollution degree ii) derating when >2000m storage temperature for a long time 20 25℃ ≤6 months 20 45℃ ≤3 months 20 60℃ ≤1 months must stop charging/discharging once the cell temperature exceeds operation charge/discharge temperature range do not store the battery more than half a year up to half a year must be charged once the battery with protect circuit should be charged one time when stored for three mouths 2 2 battery pack integration in the 20c1600k system, each battery pack contains 48 battery cells the smallest unit in the battery system the battery pack is standardized, easy to install and maintain, and features high energy density, consistency, reliability, and stability the battery pack is designed with independent liquid cooling ducts inside, which provides good heat dissipation the battery management unit (bmu), voltage sensors, and thermal sensors are also integrated in the pack to ensure the cells' stable performance · bmu on board, active balance also · liquid cooling · multi communication · 47 002kwh with 1p48s cell configure, output 153 6vdc · ul9540a tested battery pack specifications no item specs 1 battery cell qty (pcs) 48 2 cell configuration 1p48s 4 bmu qty (pcs) 1 5 rated voltage (v) 153 6 6 voltage range (v) 134 4 170 4 7 rated capacity (ah) 314 8 energy (kwh) 48 230 lp47 battery pack 2 3 battery string integration the battery string consists of 8 battery packs connected in series and mounted on 1 battery rack the string is designed with battery module slots, cmu, dc power distribution space, fans and air ducts each battery pack is equipped with a battery monitoring unit (bmu) the 8 bmus are connected to the battery string management system (cmu) through canbus the cmu manages the battery string and control the string's dc contactor the cmu uploads battery information and dc switch status to the dispatch control terminal via ethernet and receives control commands from the gpc · comprehensive monitoring of battery operating status · reliable charge and discharge · built in multi level protection · modular design with high scalability · full metal frame · ul9540a tested · ul1973/iec62619 certificated battery string specifications no item specs 1 battery pack (pcs) 8 2 pack configuration 1p48s 3 bmu qty (pcs) 8 4 cmu qty (pcs) 1 5 rated voltage (v) 1228 8 6 voltage range (v) 1075 2 1363 2 7 rated capacity (ah) 314 8 energy (kwh) 385 84 ls376 8lp47 battery string 2 4 battery system integration the whole battery system comprises 8 battery strings connected each string's dc power distribution and battery management system are also integrated inside the cabinet and are modularly designed to be easy to install and maintain the total capacity of the battery system is 3,008kwh specifications are shown as below no item specs 1 battery string rated capacity (kwh) 385 8 2 battery string qty (pcs) 8 3 battery pack qty (pcs) 64 4 system total capacity (kwh) 3086 5 dc busbar rated voltage (v) 1228 8 6 dc busbar voltage range (v) 1075 2 1363 2 2 5 power conversion system (pcs) the energy storage bidirectional power conversion system enables the bidirectional energy conversion between batteries and the grid ac power its core part is an inverter composed of power electronic components with embedded control software − three level topology, up to 99% conversion efficiency, better power quality − integrated cluster level battery management function, high battery availability − intelligent multi stage fan speed regulation, wide temperature operation capacity, 50 °c no derating − support constant power, constant current, constant voltage control, with a frequency modulation, vsg, and other functions − support iec61850 protocol, with ms level responsiveness − ip66 protection, outdoor can be installed vertically and horizontally eh 0200 ha m pcs diagram main specifications are shown as below： item description battery dc side max dc voltage 1,500vdc max dc current 224 5adc battery system voltage range 1,000 1,500vdc grid ac side rated power 200kw max ac power 220kw rated grid voltage 690vac, 3w+pe grid voltage range 586 5 759v(settable) max ac current 184 1aac rated grid frequency 50/60hz thdi <1 5% ac pf 1 +1 system characteristic isolated none max efficiency 98 7% ip protection ip66 operation temperature 40 +60℃ allowable humidity range 0 100% (no condensation) maximum operating altitude 4,000m cooling temperature controlled forced air cooling communication interface rs485/can/ethernet dimension（wxdxh） 810×275×845mm weight 100kg