lifepo4 battery cells 3.2v 6000mAh main specification:
| No. | Item | Parameter s | Remark |
| 1 | Appearance | Consistent with appearance inspection standard | There should be no such defects as flaw, crack, rust, leakage,
which may depreciate the commercial value of cell. |
| 2 | Nominal Capacity | 1.5Ah | 1C room temperature≥1.5Ah |
| 3 | Nominal Voltage | 2.4V | 1C discharge platform |
| 4 | Internal Impedance | ≤18mΩ | Internal resistance measured at AC 1kHz after 50% charged. |
| 5 | Standard Charge Cut-off Voltage | 2.8V | |
| 6 | Standard Discharge Cut-off Voltage | 1.5V | |
| 7 | Maximum Continuous Charge Current | 3I1(4.5A) | 25℃±5℃ |
| 8 | Maximum Continuous Discharge Current | 5I1(7.5A) | 25℃±5℃ |
| 9 | (10s)Maximum Pulse Charge/Discharge Current(10s) | 10I15I1(7.5A 15A) | 25℃±5℃ |
| 10 | 5C | 5I1(7.5A),＜15℃ | Room temperature no more than 15℃ |
| 11 | Operating Temperature Range | Temperature:-40~6 0℃ Humidity:≤85%RH | Recommended charge/discharge current ≤0.5 I1 (0.7A), when cell
temperature is lower than 0℃,Recommended cool the cell, when cell
temperature is higher than 50℃. |
| 12 | Storage Temperature Range | -5℃~28℃ | Recommend(25±3 ℃)；≤90%RH storage moisture range. |
| 13 | Dimension | Diameter: 18.4±0.1mm Height: 65.3±0.1mm | The detailed dimension can be found in "12 Scheme of the cell
structure" of this specification. |
| 14 | Weight | 43.0g±1g | |
lithium lto battery Test Conditions of Cell Properties
3.1Standard Test Conditions
3.1.1Standard Test Environment
Test should be conducted with new cells within 30 days after
shipment from our factory and which is not cycled more than fifty
times before the test.
Unless otherwise specified, all tests stated in this Product
Specification are conducted at below condition:
Temperature:25 ± 5 °C . Humidity:15%~90%.
Atmospheric pressure:86kPa~106kPa. Height above sea level:≤4000m.
The room temperature mentioned in this product specification is
25℃±5 ℃.
3.1.2Standard Charge Method
Under standard test environment, a cell is charged to the standard
charge cut-off voltage at a constant current of 1 I1(1.5A), then
stopped charging.
3.1.3Standard Discharge Method
Under standard test environment, a cell is discharged to the
standard discharge cut-off voltage at a constant current of 1
I1(1.5A), then stopped discharging.
3.1.4Initial Capacity
Under standard test environment, a fresh cell is charged in
accordance with 3.1.2, and then discharged to the standard
discharge cut-off voltage at a constant current of 1I1 (1.5A), the
discharge capacity is defined to be initial capacity.
3.218650 lto battery Measuring Instruments or Apparatus
3.2.1Dimension Measuring Instrument
0.01mm.
Dimension measurement shall be implemented by instruments which
accuracy should not be less than 0.01mm.
3.2.2Voltmeter
Standard class specified in the national standard or more sensitive
class having inner impedance not less than 10kΩ/V.
3.2.3Ammeter
Standard class specified in the national standard or more sensitive
class. Total external resistance including ammeter and wire is less
than 0.01Ω.
3.2.4Impedance Meter
Impedance shall be measured by a sinusoidal alternating current
method (AC 1kHz LCR meter).
lto battery 18650 Cell Electrochemical Performance
| No. | Item | Test Method | Criteria |
| 1 | Cycle Life | Under standard test environment, a cell is charged in accordance
with 3.1.2, rest 10 minutes, and then discharged in accordance with
3.1.3, rest 10 minutes prior to next charge-discharge cycle. The
cell shall be continuously charged and discharged for10000 cycles. | Discharge Capacity ≥ 80% * Nominal capacity after10000 cycles |
| 2 | High Temperature Cycle Life | A cell is stored in an ambient temperature of 55±2 ℃ for 60min.
Then at 55±2 ℃, a cell is charged to the standard charge cut-off
voltage at 3.1.2, rest 15minutes, and then discharged to the
standard discharge cut-off voltage at 3.1.3, rest 15 minutes prior
to next charge-discharge cycle. The cell shall be continuously
charged and discharged for 3000 cycles. | Discharge Capacity ≥ 80% * Nominal capacity after 3000 cycles |
| 3 | Rate Charge Performance | Under standard test environment, a cell is discharged in accordance
with 3.1.3, rest 10 minutes, and then charged to standard cut-off
voltage at a constant current of3I1 (4.5A).Calculate the ratio of charge capacity (%). | Charge capacity ≥ 95% initial capacity with 3I1 (4.5A) |
| 4 | 3C Cycle Life | Under standard test environment, a cell is charged in accordance
with 3.1.2, rest 30 minutes, and then discharged in accordance with
3.1.3, rest 30 minutes prior to next charge-discharge cycle. The
cell shall be continuously charged and discharged for4000 cycles. | Discharge Capacity ≥ 80% * Nominal capacity after 4000 cycles |
| 5 | Rate Discharge Performance | Under standard test environment, a cell is charged in accordance
with 3.1.2, rest 10 minutes, and then discharged to standard
cut-off voltage at a constant current of 5I1 (7.5A).Calculate the ratio of discharge capacity (%). | Discharge capacity ≥ 90% * initial capacity with 5I1(7.5A) |
| 6 | Discharge Capacity at 60 ℃ | A cell is charged in accordance with 3.1.2, and stored in an
ambient temperature of 60±2 ℃ for 5±0.5h, and then discharged in
accordance with 3.1.3,Calculate the ratio of discharge capacity
(%). | Discharge capacity ≥ 98% * initial capacity at 60℃ |
| 7 | Low Temperature Charge Performance | A cell is discharged in accordance with 3.1.3, and stored in an
ambient temperature of-20 ±2 ℃/-40 ±2 ℃ for 24±0.2h, and then
charged to standard charge cut -off voltage at a constant current
of 1I3 (0.5A).Calculate the ratio of charge capacity (%). | Charge capacity ≥ 90%* Nominal capacity at-20℃ Charge capacity ≥
80%* Nominal capacity at -40℃ |
| 8 | Low Temperature Discharge Performance | A cell is charged in accordance with 3.1.2, and stored in an
ambient temperature of-20±2 ℃/-40±2 ℃for 24±0.2h, and then
discharged to standard discharge cut-off voltage at a constant
current of 1I1 Calculate the ratio of discharge capacity (%). | Discharge capacity ≥ 90% * Nominal capacity at -20℃ |
| Discharge capacity ≥ 80% * Nominal capacity at -40℃ |
| 9 | Retention Capability and Capacity recovery at Room Temperature | A cell is charged in accordance with 3.1.2, stored in an ambient
temperature of 25 ±5℃ for 28 days, then discharged in accordance
with 3.1.3.Calculate the ratio of discharge capacity (%).Charged in
accordance with3.1.2,rest 10 minutes,discharged in accordance
with3.1.2. Calculate the ratio of discharge capacity (%). | The residual capacity is not less than 90% of the initial capacity,
and the recoverable capacity is not less than 95% of the initial
capacity at room temperature. |
| 10 | Retention Capability and Capacity Recovery at 55℃ | A cell is charged in accordance with 3.1.2, and stored in an
ambient temperature of 55 ±2℃for 7 days, then discharged to
standard discharge cut-off voltage at a constant current of 1 I1(1.5A).Calculate the ratio of discharge capacity (%).charged in
accordance with 3.1.2,rest 10 minutes,a discharged in accordance
with 3.1.2. Calculate the ratio of discharge capacity (%). | The residual capacity is not less than 90% of the initial capacity,
and the recoverable capacity is not less than 95% of the initial
capacity at 55℃ |
Q :Do you provide free sample ?
A: Yes, a few pcs free sample can be provided, but freight will be
charged
Q: what is the warranty?
A: one year
Q:What is your payment term ?
A: T/T,L/C
Q:do you accepte OEM order ?
A: Yes,you can print yourself logo, also we can provide the design
of outlook for your special battery pack
Q :How many cells you can produce per month?
A: 1.8million
Q :What is the mode of transport?
A: usually by sea
Q:Which certificates do you have
A:We have un38.3,MSDS…etc.
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