Mobile payment terminal lithium battery case display

Mobile payment is a service method that allows users to use mobile terminals to pay for the goods or services they consume. Units or individuals directly or indirectly send payment instructions to banking financial institutions through mobile devices, the Internet or proximity sensing to generate currency payments and fund transfers, thus realizing the mobile payment function. Mobile payment integrates terminal devices, the Internet, application providers and financial institutions to provide users with financial services such as cash and bill payment. The mobile payment terminal is powered by a large capacity lithium battery, ensuring the continuous, efficient, and stable operation of the product.

1. Design requirements for lithium batteries in mobile payment terminals.

Design batteries that match the host according to customer requirements and product specifications, and incorporate lithium batteries and safety protection performance into the solution. In the entire design process of the plan, the goal is to achieve the most perfect integration with the host, ensure the safety of the battery, battery, and the entire system, and first meet the corresponding design and certification regulations. To ensure the safety and reliability of lithium batteries, it is necessary to establish multiple layers of protection inside the battery to prevent damage caused by overcharging, over discharging, or short circuits.

1) Lithium battery model design requirements: 402060-1S1P/450mAh/3.7V.

2) Design requirements for the circuit section.

1. Single battery overcharge protection voltage: 4.28± 0.25V

Add 0.50V to 4.08.

3. Single battery overload protection voltage: 3.00 ± 0.08 V.

4. Overdischarge recovery voltage of individual batteries: 3,00 ± 0,08 V.

5. Combination battery overcurrent protection value (10 milliseconds): 1.5-3.5A

6. Combination battery overheat protection value (renewable): 70 and 5 minutes

7. The finished battery also has short-circuit and reverse charging protection.

3) Design requirements for battery cycle life: 300-500 cycles (according to the national standard for charging and discharging)

4) Design requirements for battery size: refer to the computer casing in the lobby

2. Design diagram of lithium battery for mobile payment terminals.

1) Protective Circuit Board (PCM): This is mainly a protective circuit designed for rechargeable lithium batteries. Due to the chemical characteristics of lithium batteries themselves, it is necessary to provide intelligent power calculation, overcharging, over discharging, circuit short circuits, and overcurrent protection functions. To avoid hazards such as combustion and explosion.

2) Protection IC: The main protective function chip in the design scheme, which monitors online the functions of overcharging, discharging, overcurrent, short circuit, etc. of the battery cells, ensuring their safe operation., Stable and effective range.

3) Temperature switch: mainly designed for temperature protection function. Once the temperature of the battery reaches the range of 70+5 ° C due to other abnormal issues, the temperature switch will provide temperature protection.

4) Polymer lithium-ion battery: 402060P/450mAh/3.7V lithium polymer battery.

5) Field Effect Transistor (MOSFET): As a switch in the protective circuit, MOSFET will always prevent the voltage at both ends of the load from rising or falling, thereby ensuring voltage stability.

6) Battery packaging: Heat shrink PVC