3.2.3
PCBA + Battery performance test (applicable for finished goods) Performance test should be conducted for semi-manufacture (PCBA + battery) before assembly. Voltage check (on-line fully test) 1> Open circuit voltage: 4.9~5.3V 2> Loading voltage: 4.6~5.3V 3> D+: 1.8V – 2.2V (for 1A port); 2.5V – 2.9V (for 2A port) D-: 2.5V – 2.9V (for 1A port); 1.8V – 2.2V (for 2A port) Remark: not need to check D+, D- voltage if they are in short-circuited connection.
3.1.7
Lab safety testing report (for battery only) For US market: UL 1642 or UL 2054 safety testing report (UL Recognized) UN 38.3 IEC 62133 safety testing report Li-ion battery directive: 2006/66/EC UN 38.3
Fig.1 Structure of 18650 Li-ion battery
PTC Fuse: used for over-current protection. Current Interrupt Device (CID): cut off current while internal pressure is high. Gas release vent: release internal pressure, avoid explosion occurs. 2) Structure of Polymer Lithium-ion Prismatic Cell:
3.1.5
Battery marking requirements (for 18650 battery only) 1) The marking should include: Battery manufacturer trade or code Battery type (size) Nominal capacity Manufacturing date code Polarity indication: +, Scannable barcode 2) Regulation of battery marking (for FST/ZHUONENG/LG battery): FST (CJ): APPENDIX I ZHUONENG (ASO): APPENDIX II LG: APPENDIX III
2.0 SCOPE
The following specification is applied to all kind of POWER BANK, which includes one piece or more built-in Lithium-ion battery (cylindrical or prismatic) and with 5V DC input/output voltage.
3.0 REQUIREMENTS
3.1 Battery 3.1.1 Structure requirements 1) Safety design for cylindrical Lithium-ion 18650 battery 18650: From top to bottom: Top cap --> PTC fuse -> Current interrupt device (CID) -> Sealing gasket -> Gas release vent

Charging / discharging functional test (on-line fully test)
Charging test Short-circuit protection functional test (on-line fully test)
For European market:
Other required test reports 3.2 PCBA Requirements 3.2.1 To be safe, Li-ion protective IC shall with secondary protection function. For example, using DW01+8025 (or device pack: SOT23-6) or other protective IC such as 8261, CS213, GEM5018 etc.
Fig.2 Drawing of Polymer Li-ion Prismatic Cell
3.1.2
Capacity requirements Actual battery capacity shall NOT be less than nominal capacity. Testing instrument: Battery capacity detection system (Fig.3 电池ssification list Defect description Missing safety device (PTC fuse, CID, Current collector, Gas release vent) Chemical leakage Explode, caught fire or smoked during normal function test Surface temperature over 60°C during charging/discharging Poor or without discharging/charging function Voltage can’t reach 3.7 V after fully charging Internal impedance of battery exceed 65 mΩ Capacity lower than nominal value Battery with deep scratch/deformation/dent/crack Metal part got rust Missing battery marking or marking is not complete/legible Outside wrap damaged / discoloration (per severity) Dirty/Color stain/Wrinkle/Creases mark on surface (per severity) X X X X X X X X X X X X X X Cri. X Maj. Min.
Testing procedure as below: 1> Suspend (time: 5 minutes) 2> Discharging (constant current) 3> Suspend (time: 5 minutes) 4> Charging (constant current/voltage) 5> Suspend (time: 5 minutes) 6> Cycle test (1 cycle: from step 2 to step 4) 7> Finish test
Features and protective function: Short-circuit protective function: If short-circuit happen (heavy current), protective IC can cut off the output circuit or limit the current to protect whole PCBA components and battery, avoid from over-heat (caught fire) and explosion. Over-current protective function: The protective IC can monitor the current, if the real-time current over limitation, IC will start up current-limiting function to protect the whole PCBA and battery. Generally, over-current ≥ 1.5 * rated output current. Over-charging protective function: The protective IC can monitor the battery charging process, and with the function to cut off charging circuit automatically once fully charging. For general battery, the fully charging voltage is 4.2V Over-discharging protective function: The protective IC can monitor the whole discharging process, discharging circuit can be cut off automatically once battery voltage reaching the lower limit. For general Li-ion battery, the lower limit voltage at around 2.75V ~ 3.0V