A power bank is a device that can directly charge mobile devices and has its own power storage unit. At present, the multi-functional power bank in the market is basically equipped with standard USB output, which can basically meet the requirements of many digital products such as common mobile devices, mobile phones, MP3, MP4, PDA, PSP, Bluetooth headsets, digital cameras, etc.
The power bank sharing is connected with the external electronic equipment through a charging cable, and the charging cable cannot be used for data transmission. The charging cable consists of two charging cable connectors, GND line and VCC line connecting the two charging cable connectors!
The sharing power bank also includes a shell, a battery in the shell, a sharing module, a boost module and a discharge interface. The discharge interface is connected to the battery through the boost module and the sharing module in turn. The discharge interface is connected to the external electronic equipment through the charging cable. The sharing module is used to receive external instructions to control the on-off of the boost module and the battery.
Compared with the existing power banks, besides charging function, the shared power banks should also have a sharing function, namely charging-- payment function. In addition, the use of the shared power banks is charged on time. The timing can start when the user scans the QR code, and then stop when the user pays, further safeguard the interests of users, prevent the power bank from being unavailable or running out of power while the backend program is still charging, which is likely to cause disputes. In order to prevent this dispute, the actual connection time of the power bank is used as the timing time, so as to prevent excessive deduction of fees and make customers more reliable.