Active Member
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[China]
Address: Room 910, HeFaTouZi Building, QingQuan North Road, 2528 Block，YuCui Industrial Area, LongHua District,518053 Shenzhen China.
Contact name:Sales Manager
Shenzhen Herculesi Technology Co., Ltd. |
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2S2P 6.4V 2800mah LiFePO4 Rechargeable Battery Pack with JST Connectors
Electrical Characteristics Nominal Voltage - 6.4V Nominal Capacity – 3000mAh Energy - 19.2Wh Internal Resistance - ≤90mΩ Cycle Life -> 2000 cycles @1C 100%DOD( see below picture ) Months Self Discharge - <9% Efficiency of charge - 100% @0.2C Efficiency of discharge - 96~99% @1C |
Standard Charge Charging voltage - 7.3V +/- 0.1V Charge mode - 0.2C to 7.3V , then 7.3V charge current to 0.02C (CC/CV) Standard Charger current - 350mAh Fast charge current - 1Amp Charge cut off voltage - 7.3V ( 3.65V * 2 series ) |
Standard Discharge Continuous Current - 3A Max. Pulse Current - 6A (<5s) Discharge cut off voltage – 5V ( 2.5V *- 2 series ) Rated power : 19.2W |
Environmental Charge Temperature - 0 ℃ to 45 ℃ (32F to 113F) @60±25% Relative Humidity Discharge Temperature - -20 ℃ to 60 ℃ (-4F to 140F) @60±25% Relative Humidity Storage temperature - 0 ℃ to 40 ℃ (32F to 104F) @60±25% Relative Humidity |
Mechanical Cell & Method - 3.2V 1500mAh 18650 lifepo4 cell -2S2P - 4PCS cells Body casing – PVC + PET case Battery Dimensions -40*145*70mm Battery weight : 210g |
Application Led lights , easy to make in parallel or in series . |
Lithium-ion vs Lead-Acid cost analysis
We take the example of a solar installation for a standalone building (Self Sufficient Home). The storage capacity for the battery is 50KWh.
The application need is summarized in the above table:
| SPECIFICATIONS | VALUE |
Stored Energy | 50KWH |
| Cycling frequency | 1 x discharge/charge per day |
| Average ambient temperature | 23°C |
| Expected Lifespan | 2000 Cycles, or 5.5 years |
The costs of delivery and installation are calculated on a volume ratio of 6:1 for Lithium system compared to a lead-acid system. This assessment is based on the fact that the lithium-ion has an energy density of 3.5 times Lead-Acid and a discharge rate of 100% compared to 50% for AGM batteries.
Based on the estimated lifetime of the system, the lead-acid battery solution-based must be replaced 3 times. Lithium-Ion solution-based is not replaced during operation (2000 cycles are expected from the battery at 100% DoD cycles)
The cost per cycle, measured in € / kWh / Cycle, is the key figure to understand the business model. To calculate it, we consider the sum of the cost of batteries + transportation and installation costs (multiplied by the number of times the battery is replaced during its lifetime). The sum of these costs is divided by the net consumption of the system (50kWh per cycle, 365 cycles per year, 5.2 years of use).
