Subsequent Feather Bo Air 10000mAh Disassemble the mobile power supply after evaluation portable source (See the author for evaluation details: Evaluation of Yubo Air 10000mAh dual input mobile power supply )This time, this mobile power supply will be disassembled.
Disassembly tools: micro electric screwdriver, stainless steel crowbar.
The disassembly of this mobile power supply must not start from the front panel of USB output and input! The reason will be revealed when looking down. Start from the nameplate at the bottom of the mobile power supply and pry the plastic sheet of the nameplate.
When you see two screws, screw them out with a screwdriver.
Remove the screws and pry out a piece of plastic baffle.
At this time, the mobile power supply cell and PCB can be pushed out from the back to the front. It can be found that the front panel is integrated with the PCB bracket! If you try to pry off the front panel, the bracket will be damaged!
The internal structure of the mobile power supply has been extracted from the housing.
The PCB and polymer cell of the mobile power supply are enclosed in the plastic bracket, and the surface of the battery is pasted with a protective rubber pad to prevent vibration and isolate the contact between the battery and the shell.
The size and specification of the electric core is 5565110, the nominal capacity of a single electric core is 5000mAh, the energy is 18.5Wh, and the voltage sharing is 3.7V. Two electric cores are connected in parallel to form a capacity 10000mAh , 37Wh battery pack. High temperature resistant adhesive tape is wrapped around the battery and fixed on the battery rack with adhesive tape to prevent the battery edge from being scratched and damaged.
The PCB of the mobile power supply is fixed on the plastic bracket with two screws.
Unscrew the two screws fixing the PCB and tear off the adhesive tape fixing the battery, so that the PCB and the battery pack can be taken out from the bracket together.
PCB and battery bracket.
At the front of PCB, two inductors are responsible for charging and boosting respectively.
Interface on PCB.
Silk screen P203 is The output recognition chip is compatible with Android iPhone, tablet computer, etc.
lightning The mother socket is produced by KRCONN, Shenzhen Jingrui Industrial Technology Co., Ltd.
Four battery indicator LEDs.
At the back of PCB, Lightning power supply chip, charging chip, synchronous rectification boost chip, lithium battery protection chip and MCU are distributed from left to right.
The silk screen S06 is a lightning port recognition chip, which allows full speed charging when the mobile power is plugged into the Apple data cable.
The silk screen MT5033 eight leg chip is an 800kHz high-efficiency lithium battery boost converter, which can set the boost voltage through the external circuit; Built in PSM working mode to ensure high efficiency under light load, and the static current is only 1uA; Built in undervoltage protection function, after triggering, the load is completely disconnected from the battery.
The silk screen JA5088Sc is a two in one lithium battery protection IC.
Screen printing mt2011 is a synchronous rectifier charging chip, with maximum charging current of 2A, and overheating protection function.
Silk screen 01BQ809 is SCM, power indicator, control and other functions, some parameters have been polished. There is also a jumper at the lower right corner of the PCB, whose function is unknown.
From the above disassembly, we can see that Yoobao Air The dual input mobile power supply uses independent charging and synchronous boost circuits. The lithium battery protection circuit is complete, and the internal components are welded neatly. In addition to the Micro charging port, it also has a Lightning charging input interface, which greatly facilitates the use of Apple mobile phone users.