renewable solar photovoltaic energy battery storage
| 12V 40Ah lithium polymer battery pack | ||
| Mechanical | Cell & Method | Ternary/(NiCoMn)O2, |
| Dimension(D*W*H) | 253.5*191*169MM | |
| Weight | 15.8KG | |
| Electrical Characteristics | Rated Capacity | 40Ah |
| Min Capacity | 39Ah | |
| High Rate Discharge Capacity | > 90% Rated Capacity | |
| Discharge Capacity @ -20℃ | > 70% Rated Capacity | |
| Norminal Voltage | 68.4V | |
| Open Voltage | 74-76V | |
| Load Voltage | 52.25V | |
| Energy | 2736Wh | |
| Internal Impedance(@ 1000Hz.) | 50mR | |
| Cycle Life | >1000 Cycles @ 3C 100% DOD | |
| Months Self Discharge | 5% | |
| Efficiency of Charge | 100% @ 1/3C | |
| Efficiency of Disharge | 95% @1C | |
| Standard Charge | Max Charge Voltage | 79.8V |
| Charge Cut-off Voltage | 79.8V | |
| Charge Current | 1/3C, 13.3A | |
| Max Charge Current | 40A | |
| Standard Discharge | Standard Current | 40A |
| Max Discharge Current | 3C, 120A | |
| Discharge Cut-off Voltage | 52.25V | |
| Environmental | Charge Temperature | 0~45℃ ;20%Relative Humidity |
| Discharge Temperature | -20~60℃ ;20%Relative Humidity | |
| Storage Temperature | 1month, -20~60℃, 20%Relative Humidity | |
| 6moth, -20~30℃, 20%Relative Humidity | ||
The role of solar cells is to store the power generated by the solar array when it is illuminated and to supply power to the load at any time.
The basic requirements of solar cells for the battery pack are:
A. self discharge rate is low;
B. long service life;
C. deep discharge ability;
D. charging efficiency is high;
E. less maintenance or maintenance free;
F. working temperature range is wide;
G. low price.