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%