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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2S1P Lithium Ion LiFePO4 Battery Pack 6.4V 1300mAh Rechargeable Battery
Electrical Characteristics
Nominal Voltage - 6.4V Nominal Capacity – 1300mAh Energy - 8.32Wh 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 1300mAh 18650 lifepo4 cell -2S1P - 2PCS cells Body casing – PVC + PET case |
Application Led lights , easy to make in parallel or in series . |
Pictures
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 |
Major advantages of Lithium Iron Phosphate:
Very safe and secure technology (No Thermal Runaway)
Very low toxicity for environment (use of iron, graphite and
phosphate)
Calendar life > 10 ans
Cycle life : from 2000 to several thousand (see chart below)
Operational temperature range :up to 70°C
Very low internal resistance. Stability or even decline over the
cycles.
Constant power throughout the discharge range
Ease of recycling
About BMS knowledge
Measurement :
Cell and Pack voltage
Cell and Pack temperature
Current measurement by shunt and Hall effect sensor
Management :
Hundreds for battery modules in series/parallel
Cell Protection
Thermal Management
Balancing passive or active
Redistribution (active balancing)
Precharge system
Life-Line for safety feature
Evaluation :
Accurate State of Charge (SOC)
Accurate State of Health (SOH)
Depth of Discharge (DOD)
Internal Resistance
Residual Capacity
External Communication :
Communication by CAN bus, CAN Open, RS485, RS232, Ethernet, WIFI,
4G.
Charger Management using CAN Bus
Cloud-based Data logging using API REST
Cloud-based Remote monitoring
