Introduction (Smart watch charging bank, mobile power supply) With the development of mobile technology, many traditional electronic products are also adding mobile functions. For example, watches that used to be used only to tell the time can now be connected to the Internet through a smart watch or home network to display incoming call information, Twitter and news feeds, health checks, location and other content.



Smartwatches are convenient for people's lives, but they are worn on the wrist. Currently, large smartwatches usually need to be removed to charge. Significantly reduces the customer experience. According to the needs of high-end customers, our company has customized and developed a button-type smartwatch charging bank, which is fast and efficient and can be directly charged on the watch without charging cable or removing the smartwatch.



I. Design requirements of smart watch charging bank:



The battery design uses special high voltage system lithium cobalt acid battery, the cell has high safety, high capacity ratio, small size, light weight; Smart LED battery display.



Ii. Specific plan of smart watch charging bank

1) Cell specification characteristics:



Lithium polymer battery: PL683935-3.8V1250mah



High safety, high volume ratio, 4.3V high voltage system, to ensure that the charging bank to provide enough electricity.

2) Structural design:



1. The shell adopts ABS+PC fireproof plastic shell, the surface is sprayed with oil, feel good, beautiful.



2. Charging interface adopts MACR USB port, which is commonly used for mobile phone charger.



3. The discharge interface adopts four gold-plated probes to ensure good contact with the smart watch.





3) Electric quantity indicator: accurate electric quantity management + accurate LED electric quantity display. SBS intelligent battery management system is adopted to effectively manage the battery's remaining power.







4) Protection circuit: imported IC and MOS tube, with over charge, over discharge, over current, short circuit and other functions, so that the cell in a safe, stable, efficient range of work, the specific parameters are as follows:



1, single overcharge protection voltage: 4.40±0.25V

2, single overcharge recovery voltage: 4.3±0.50V

3, single over-discharge protection voltage: 2.8±0.08V

4, single over-discharge recovery voltage: 3.00±0.08V

5, overcurrent protection value (10ms) : 2~4A

5) Temperature protection: temperature protection switch is designed in the circuit. When the battery temperature or the working environment temperature is higher than the temperature protection value, the temperature control switch will be disconnected, so that the battery stops working to ensure the safety of the battery. When the temperature drops, the battery returns to normal operation.