The protection of NTC thermistor in lithium batteries.Smart Microwave Sensor switch

　　With the popularity of smart phones, users have higher and higher batteries in mobile phones. Larger currents and longer working hours are consumer pursuit. At the same time, the demand for small and light weight products is also very strong. The battery occupies a considerable proportion in the volume and weight of any equipment. Therefore, manufacturers pay great attention to reducing their volume and weight.

　　These requirements prompt battery manufacturers to turn new chemical materials such as nickel -metal hydride and lithium ions to obtain higher power density, lighter weight and faster charging speed. These functions, especially fast charging, increase the complexity. The new battery needs to be accurately controlled by the charging circuit, not only to ensure that it is fully full, but also needs to extend its service life as much as possible and prevent the danger that may occur under overheating conditions.

　　Lithium-ion batteries usually use the constant current-constant voltage plan, which still requires monitoring temperature to allow fast charging. At the same time, it is necessary to ensure that it is stopped when the temperature exceeds the safety critical value. Essence

　　During the charging process of lithium batteries, the protection of NTC thermal resistance is mainly reflected in the following aspects:

　　· Detect changes in temperature during the charging process.

　　· Detecting ambient temperature and allowing fast charging.

　　· The fever of the battery caused by abnormal current was detected.

　　· Execute the energy surplus power display voltage measurement temperature compensation.

Read recommendations:

Classification of NTC thermistor ceramic resistors.infrared sensor lens price

NTC thermistor that is suitable for switching power supply

PIR Lens 8605-3

PIR Lens 7709-1

PND103F3950FTR325