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NIMH AA1600mAh 4.8V battery pack 3C discharge for medical device with UL IEC EN61951 certification.
1. Specification of the battery pack:
Description | Unit | Specification | Condition |
Nominal Voltage | V | 4.8 | Pack |
Nominal Capacity | mAh | 1600 | Standard Charge/Discharge |
Minimum Capacity | mAh | 1600 | Standard Charge/Discharge(0.1C charge,0.2C discharge) |
Standard Charge | mA | 160(0.1C) | Ta=0~40℃ |
hour | 16 | ||
Fast Charge | mA | 320(0.2C)~800(0.5C)with charge termination control | -△V=5mV/cell Timer cutoff=110%input capacity Te. cutoff=40~45℃ dT/dt=0.8℃/min(0.5 to 1.0C); 0.8~1℃/min(1C) |
hour | 7.0 approx.(0.2C) | ||
2.4 approx (0.5C) | |||
Trickle Charge | mA | 48(0.03C)~80(0.05C) | Ta=0~40℃ |
Discharge Cut-off Voltage | V | 4 | Pack |
Maximum Discharging Current | A | 4.8(3C) | Ta =0~50℃ 3.2V cut off |
Storage Teerature | ℃ -20~+35 * |
Open circuit voltage: ≥ 5V
Internal iedance(RI) : ≤250mΩ
High rate discharge(1c) : ≥54 min
2. Safety test
Over discharge: 0.1C charge for 48hrs No conspicuous deformation and/or leakage.
Charge reserve: Standard charge Storage: 28 days Standard discharge (0.2C) ≥180min
Humidity: Standard charged, stand for 10 days at 33±3℃ and 80±5% of relative humidity No leakage
External Short Circuit: After standard charge, short-circuit the cell at 20 ℃ ± 5 ℃ until the cell teerature returns to ambient teerature.(cross section of the wire or connector should bemore than 0.75mm2) No fire and no
explosion
Vibration Resistance: Charge of voltage should be under 0.08V/pack, change of iedance should be under20milli-ohm/cell.
Drop Test: △V<0.02V/cell △Ri<5%/cell Charge at 0.1C for 16hrs,and then leave for 24hrs,check battery before / after drop