CURVED LIPO BATTERY
Features: ultra-thick, Stacked structure, more stable and high C-rate.
Capacity: 480mAh
Maximum discharge current: 1C, pulse:5C
Used for trackers, unkown quantity.
Customer demands:
Large capacity, stable performance
Solutions:
The capacity adopts pure cobalt to ensure the maximum capacity under this size.
Stable performance,
Because the battery thickness is extremely thick, 6.5 mm, the previous supplier adopted the winding structure, the pole chip is easy to lose powder, causing a small short circuit, resulting in power loss, K value is not good.
Therefore, the GMB engineers adopt the laminated structure to solve the problem of powder loss caused by the bending of the battery after it is wound up.
(The above GMB laminator can make batteries of any shape.)
The finined battery packs meet customer' requirment:
NO
| Item
| Test Method
| Criterion
|
1 | Visual inspection
| visual inspection
| Not allowing any visual defects which will affect the electronic characteristics, such as leakage and damage. |
2 | Battery Dimension | Digital Calipers | Length：65.8mm Max Width：15.0mm Max Thickness：6.5mm Max |
3 | Initial Impedance | Internal resistance measured at AC 1KHz after 50-60% charge | ≤250mΩ |
4 | Rated Capacity
| The capacity means the discharge capacity of the cell, which is measured with discharge current of 0.2C with 3.0V cut-off voltage after the standard charge. | ≥480mAh |
5 |
| Test condition： Charge：0.2C to 4.2V Discharge：0.2C to 3.0V When the discharge capacity reduced to 70% of rated capacity, Stop testing | The cycle times is not less than 300
|
6 |
| A charged battery is placed in an oven for 2 hours at 80oC±2oC, then discharged at a 0.2C current to the termination voltage. | Discharge 90 percent of the original capacity.
|
7 | Low Temperature
| A charged battery is placed in a thermal chamber for 4 hours at -10oC±2oC; then discharged at 0.2C to the termination voltage. | Discharge 60 percent of the original capacity.
|
8 |
Electricity maintenance | After the standard charging, storied the cells under the condition as 20±5 oC for 30days, then measured the capacity with 0.2C till 3.0V |
Remaining capacity≥ 85%
|