LiFePO4 Battery Feature of LiFePO4 Battery: High Energy Density: The battery delivers double to tripe energy compared with lead-acid battery of the same volume and mass. Long Cycle Life: The cycle life is five times that of Lead acid battery. Adaptability to a Wide Range of Tempe- ratures: The batteries can wk at a temperature between -20 ~ +60 High C-rate: Suppt high charge/discharge rate to meet the requirement f high-current discharge in a sht time and quick charging. Environmental Friendliness: Environmental friendly and free from heavy metal. Functions of BMS Over-charging protection Over-discharging protection Over-current protection Applications Over-temperature protection Low-temperature protection Sht circuit protection Reverse polarity protection Balancing Multi-communications 1
48V Series 48V Series Nominal Assembly Method Limits 48V 15S 40 ~ 54V Cycle Life 3000 @25 0.2C 100%DOD Months Self < 3.0% Charge at Different C-Rates @25 Dishcharge at Different C-Rates @25 Efficiency of Charge Efficiency of Case Materials Protocol Wk / SOC Light Charge Charge Method(CC-CV) Cut-off 100%(0.2C) > 99%(0.2C) Iron Modbus/RS485/RS232 LED 54V Supply constant current until the battery voltage hits 54V,and then supply constant voltage of 54V until the charge current drops to lower than0.01c 40V Charge 0 ~ 55-20 ~ 60 Stage 0 ~ 40 Model LD-4810 LD-4820 LD-4840 LD-4850 LD-4875 LD-48100 Nominal Capacity h 20Ah 40Ah 50Ah 75Ah 100Ah at Different Temp. @ 0.2C Cycle Life at Different DODs @ 0.2C Energy 480Wh 960Wh 1920Wh 2400Wh 3600Wh 4800Wh Weight 6kg 11.5kg 23kg 29kg 42kg 58kg Max. Charge Current 20A 40A 50A 75A 80-100A Max. Current 20A 40A 50A 75A 80-100A Dimensions W(mm) D(mm) H(mm) LD-4810 442 385 44 LD-4820 442 385 88 LD-4840 442 385 132 LD-4850 442 385 132/162 LD-4875 442 400 176 LD-48100 442 410 221 2 3
Cell Series Cell Series Model h h 25Ah 50Ah 75Ah Nominal Capacity h(standard h(standard 25Ah(Standard 50Ah(Standard 75Ah(Standard 0.2C5A ) 0.2C5A) 0.2C5A) 0.2C5A) 0.2C5A) Charge at Different C-Rates@25 Dishcharge at Different C-Rates@25 Nominal Internal Resistance 5.0mΩ 5.0mΩ 2.0mΩ 1.5mΩ 0.7mΩ Months Self < 2.0% Cycle Life 3800 times @25 80%DOD Standard Charge 5A 15A Max. Charge Current 25A 50A 75A Charge Cut-off 3.6V Standard 5A 15A Max. Current 20A 20A 50A 100A 150A at Different Temp. @ 0.2C Cycle Life at Different DODs @ 0.2C Stage Temp. -10 ~45 25%~85%RH @40%~60%SOC Wking Temp. Charge0~55-20~60 Shell Al-Plastic Film Al-Plastic Film Al-Plastic Film Al Al Model L(mm) H(mm) R(mm) Weight(g) h 270 68 8 275 h 165 102 9 275 25Ah 190 159 9 580 50Ah 316 190 11 1300 75Ah 250 135 27 1790 4 5
Cell Cell Over Cell Under Pack Pack Over Over-charge Under-discharge Over-charge Over-charge Over-charge Over-charge Under-voltage Under-voltage Under-voltage Under-charge Over-charge Under-discharge Over-charge Over-charge Over-charge Over-charge 3600mV 2800mV 3700mV 1s 3400mV 1.Cell voltage is lower than the release limit and it will charge automatically. 2.Cell voltage is lower than the protection limit and SOC<=95%(regular charge condition:1 power supply/1 day),then it will charge again. 2500mV 1s 2700mV The effective charging current is detected and the voltage is higher than the recovery limit. 55.0V 42.0V 55.5V 1S 51.0V 1.Cell voltage is lower than the release limit and it will charge automatically. 2.Cell voltage is lower than the protection limit and SOC<=95%(regular charge condition:1 power supply/1 day),then it will charge again. Pack Under Under Under-voltage Under-voltage Under-charge 39.0V 1S 42.0V The effective charging current is detected and the voltage is higher than the recovery limit. Cell High 55 Low 0 Cell Cell Environment Environment Charge High-Temp. Charge High-Temp. Charge Low-Temp. Charge Low-Temp. High-Temp. High-Temp. Low-Temp. Low-Temp. 60 50-5 0 65 50-20 0 High 65 Low -10 High 70 High 50 Low -20 Low 0 Power High 90 Low -30 High 115 Over-current Charge Over-current Charge Model 20A 50A 75A 100A Over-current Charge Current 1 20A 50A 80A 125A Over-current Charge Current 13A 25A 55A 85A 130A Over-current Charge Delay 5s 1s Charge Current Limit Charge Current Limit NC NC 20A Over-current Over-current Over-current -2 Sht Circuit Current Over Current Continuous Over Current Locking Over-current Current -1-24A -50A -80A -125A Over-current Current Over-current Delay -13A -35A -55A -85A 5s -130A Over-current -2-50A -45A -150A -100A -150A Over-current -2 Delay OCP-2 Locking Over-current -2 Locking Sht Circuit Current Current Sht Circuit Current Delay Sht Circuit Current Locking Sht Circuit Current Locking Auto Delay Continuous OCP-2 Locking, Charger / 600ms Continuous OCP-2 Locking, / Charger 1s Continuous OCP-2 Locking, Charger Continuous OCP-2 Locking, Charger -100A -150A -300A -350A -350A 150us 800us 300us Continuous sht circuit, beyond the sht circuit current protection locking times. Reset after cutting off the loads charge release. Over current happens within the interval of 5 minutes is called Continuous Over Definition of Continuous Over Current Current. Over Current Locking Times 60s 3 times F BMS :1. current>1.0a 2. If it is not released within 48h, it will be automatically removed and re-charge. Pack Under High 80 Low -40 Communication Stage No Modbus/RS232/485 Yes Low -20 Optional Functions 20A current limit double 485communication screen prevention of feedback 6 7
Operation Principle of Batteries Operation Principle of Batteries Over and Under s Over Charging Current Over Charge Current limiting Any Cell >3.60V Battery >54.0V All Cell <3.60V and Battery <54.0V Nmal IF Have Charge Current Limiting Function Current > 1 Nmal f No Charge Current Limiting Function Current 2 Current 2 Over Charging Current After 60s Current > 1A All Cell >2.80V and Battery > 42.0V Any Cell <2.80V Battery <42.0V Current 3 Over Charging Current Under If n=10 (each time interval 30s) Manual Reset Current > 1A Continuous Overcurrent Locking Over and Under s Over Discharging Current Pretection Over Nmal All Cell 3.40V and Battery 51.0V Any Cell 3.70V Battery 55.5V SOC 96% Current 1.0A Current 4 Current 4 Nmal Over Current Current 5 After 60s Charge Current > 1A All Cell > 2.50V and Battery > 39.0V Any Cell 2.50V Battery 39.0V Over Current Under If n=10 (each time interval 30s) Continuous Overcurrent Locking Manual Reset Charge Current > 1A 8 9
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