Introduction to basic knowledge of mobile phone lithium-ion battery

The capacity of a lithium-ion battery in a mobile phone refers to the electric energy that the active material in the battery can release from the electrochemical reaction. After using the mobile phone lithium-ion battery for a period of time, it will be found that the discharge time of the battery is getting shorter and shorter. The reason for this situation may be that the battery is not fully charged, such as insufficient charging time and low charging efficiency; the discharge current of the battery is too large, resulting in The discharge efficiency of the battery is reduced, so the discharge time is shortened; the temperature of the battery is too low when the battery is discharged, which causes the discharge efficiency of the battery to decrease. Mobile phone lithium-ion batteries are divided into static resistance and dynamic resistance, which are equivalent to the internal resistance when the battery is discharged and the internal resistance when charging. Mobile phone lithium-ion batteries also have charging efficiency and discharge efficiency. Charging efficiency refers to the measurement of the conversion of electrical energy consumed by the battery into chemical energy during the charging process; discharge efficiency refers to the actual voltage released under certain discharge conditions. The ratio of power to rated power. The charging efficiency of mobile phone lithium-ion battery is mainly affected by the battery technology, formula and working environment. Generally, the higher the temperature, the lower the battery charging efficiency; and the discharge efficiency is mainly affected by factors such as discharge rate, environment, and internal resistance. The higher the discharge efficiency, the lower the discharge efficiency, and the lower the temperature, the lower the discharge efficiency. Mobile phone lithium-ion battery parameter test The mobile phone lithium-ion battery parameter test is based on the general specification. Mobile phone lithium-ion battery has overcharge protection, overdischarge protection, short circuit protection and discharge performance test. When the mobile phone lithium-ion battery is tested for overcharging, overdischarging, and short circuit, it is required that the battery should not show smoke, fire, explosion, liquid leakage, leakage, etc. There are two modes of discharge performance test: 0.2C5A and 1C5A. When the 0.2C5A discharge test is performed, the time is not less than 5 hours; when the 1C5A discharge test is performed, the time is not less than 51 minutes. When performing performance tests on mobile phone lithium-ion batteries, a medium that can transmit current is usually used. For example, the high-current shrapnel micro-needle module can pass the current within 1-50A in the mobile phone lithium-ion battery test, and play a good connection function; and it has a reliable response method in the field of small pitches. Maintain a stable connection in the pitch, do not get stuck or keep pinning. The stable performance of the connection module is conducive to improving the efficiency of mobile phone lithium-ion battery testing. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous: What kind of express delivery can lithium-ion batteries take? What are the basic requirements for lithium-ion battery transportation