Analysis of Ageing Effect on Li-Polymer Batteries

Table 1

Main data of the cells under test.

Item	Specifications	Remark
Rated capacity	10000 mAh	0.2 C-5 A discharge, 25°C
Rated voltage	3.7 V	Average voltage at 0.2 C-5 A discharge
Standard charge current	0.2 C-5 A	Working temperature: 0~40°C
Max charge current	1 C-5 A	Working temperature: 0~40°C
Charge cut-off voltage	4.2 V	CC/CV
Discharge current	Continuously, 10 C; max, 15 C	Working temperature: 0~60°C
Discharge cut-off voltage	2.75 V
Cell voltage	3.7–3.9 V	When leaving factory
Impedance	≤12 mΩ	AC 1 kHz after 50% charge, 25°C
Weight	Approx. 228 g
Storage temperature
≤1 month	−10~45°C	Best 20 ± 5°C for long-time storage
≤3 months	0~30°C
≤6 months	20 ± 5°C
Storage humidity	65 ± 20% RH