This specification describes the type and size, performance, technical characteristics, warning and caution of the HETER-3.2V/50Ah LiFePO4 rechargeable pack.The specification only applies to HETER-3.2V/50Ah LiFePO4 pack supplied by HETER ELECTRONICS GROUP CO.,LTD.
2. Product and Model
2.1 Product: Lithium-ion Battery Pack
2.2 Model: HT-3.2V50Ah-1S36P-18650
2.3 Picture And Output Wire
Copper extremely column
Copper extremely column
3. Battery PackSpecifications
At 0.2C discharge rate
Max continuous discharge
Discharge cut-off voltage
Use a constant current, constant
voltage(CC/CV) lithium-ion (Li+)
battery charge controller.
Between positive and negative
polar of discharge port
Operation temperature range
Storage temperature range
0℃～40℃ at half
Recommended long-term storage
℃temperature is 15~25
Storage environment humidity
4.Appearance And Delivery Condition
There shall be no such defects as scratch, discoloration, leakage which may adversely affect commercial value of the cell. About 80%~90% charged (after discharged, use the charger to charge about 4~5 hours).
5. Standard Test Conditions
5.1 Environmental Conditions
Unless otherwise specified, all tests stated in this specification are conducted at temperature 25±2℃and humidity 65±20%, air pressure 86kPa～106kPa .
5.2 Measuring Equipment
a)Voltage is measured by D.C. voltmeter which precision is higher than 0.5 grade and self resistance is
higher than 1kΩ/V;
1.Current is measured by D.C. meter which precision is higher than 0.5 grade;
2.Temperature is measured by thermometer which has proper measuring range and division value is lower than 0.5℃；
d）The timer used in measuring should be degreed in hour, minute and second, and should have degree
of accuracy no more than ±1%.
5.3 Test conditions
The cells to be tested should be new cells and within one month after shipment from our factory and the
cells shall not be cycled over five times before the testing. All the tests in this specification shall be conducted
in an ambient temperature of 25ºC ±2ºC under a humidity of 65±20%, unless otherwise specified .
6.1 Standard charge
Charge the battery with DC stabilized power supply 3.65V, constant-current 0.2C(A) current until current reach to 0.02C（A）.
6.2 standard discharge
Discharge the battery at 0.2C to 2.5V or the protection circuit come to protection, stop.
6.3 Electrical Performance
After standard charge, store the battery
≥100% N ominal capacity
After standard charge, put the cells into
≥95% N ominal capacity
under 5.1 specified conditions, check the
After standard charge, store the cells for
capacity retention rate≥95% of minimum capacity
7. Characteristic curve
8.1 Charging current should be less than maximum charge current specified in the Product Specification. Charging with higher current than recommended value may cause damage to cell electrical, mechanical and safety performance and could lead to heat generation or leakage.
8.2 The cell shall be discharged at less than the maximum discharge current specified in the Product Specification. High discharging current may reduce the discharging capacity significantly or cause over-heat.
8.3 It should be noted that the cell would be possible to be at a over-discharged state by its self-discharge characteristics in case the cell is not used for long time. In order to prevent over-discharging, the cell shall be charged periodically to maintain between 3.3V and 3.4V.Over-discharging may causes loss of cell performance, characteristics, or battery functions.
8.4 The storage temperature and humidity of the battery are as below: -10℃~40℃ within one month ，
0℃~35℃ within 2 months，15℃~25℃ for 3 months and above 3 months .Humidity: 65±20%RH .
8.5 Prohibition of disassembly.
8.6 Do not expose the battery to extreme heat or flame.
8.7 Do not reverse the polarity of the battery pack for any reason.
8.8 Do not immerse the battery pack in water or sea water, or get it wet.
8.9 Use a constant current, constant voltage (CC/CV) lithium-ion (Li+) battery charge controller.
Warranty period begins from the delivery date, and is exclusively continued 6 months.HETER is not responsible for the incident caused by not obeying the specifications.Before using the battery, you should read the specifications,usage instruction and some attentions carefully to learn its application method and areas. If the phenominon such as error using method or wrong circuit connection,or input power data,working index are inconsistent with the specifications happen and cause damage to production,circuit and its accesories, we are not responsible for it.