Customer’s 12V Solar Light LiFePo4 Battery Requirements
Introduction
This Malaysia customer is a solar light manufacture and is is developing a new solar street light for a project in Malaysia and need a 12V Solar Light LiFePo4 battery pack.
Battery Requirements
- Voltage: 12V
- Power consumption: Power 50W light and can work for 12 hours
- Battery size: within 250mm x 210mm x 70mm
- Battery Cycle Life: 2000 cycles +
- Solar charge controller model: 0850-DCLir
Flion power’s Custom 12V Solar Light LiFePo4 Lithium Battery Solution
Battery Solution Design Idea
Considering that the customer require cycle life >2000 cycles, and size quite compact, it should use small LiFePo4 lithium battery cylindrical cell, as prismatic cell or module LiFePo4 cell’s size are too big to fit 250mm x 210mm x 70mm.
12V LiFePo4 cell requires 4 series of 3.2V LiFePo4 cylindrical cell to make 12.8V=3.2V*4.
50W light work for 12hours requires energy 600Wh=50W*12h. As the solar charger’s Led drive efficiency is 95.5% and self consumption power is 6mA, so it requires at least 628.5Wh≈600Wh/95.5% from the battery + 6mA*12h from the battery.
So the battery capacity require at least 49.1Ah≈625.5Wh/12.8V.
Considering above battery requirements of size, voltage, capacity, we choose a 32700 6000mAh cylindrical LiFePo4 cell to make 4S9P 12.8V 54Ah.
To learm more cylindrical cells options
General Battery Solution Info
- Nominal voltage: 12.8V (V=3.2V*4 ,out put voltage range is 8.4V to 12.8V)
- Nominal capacity: 54Ah (54Ah=6Ah*9)
- Nominal energy: 691.2Wh (691.2Wh= 12.8V*54Ah)
- Cell type: 32700 6000mah
- Compose type: 4S9P
- Size: wtihin 250x210x70mm
- BMS: 8A
- Max Continuous discharge current: 8A
- Max Continuous charge current: 8A
- Discharge connector：To be confirmed by customer
- Charge connector: To be confirmed by customer
Battery Cost & Lead time
Unit Price: 1000pcs USD9X/pcs, around 30~35 days.
