Polymer battery charging voltage

Explain the charging voltage of polymer batteries. Today I will follow the lithium-ion battery manufacturers to understand the charging instructions of polymer batteries to ensure the safe charging and reasonable protection of the batteries: polymer lithium-ion batteries refer to lithium-ion batteries for the positive and negative electrodes. Embedded compound. The positive electrode is a lithium compound LiCoO2, LiNiO2 or LiMn2O4, and the negative electrode is LixC6. Typical battery systems are: (-)C|lipf6-ec+DEC|LiCoO2(+) Positive reaction: LiCoO2u003dLi1-xCoO2+xLi++xe(2.1) Negative reaction: 6C+xli+xe-u003dLixC6(2.2 ) Total battery reaction: LiCoO2+6Cu003dli1-xcoo2+LixC6 (2.3) The electrochemical window of the cathode material, cathode material and electrolyte of the current commercial lithium-ion battery is basically above 4.5v, that is, when the charging voltage reaches 4.5v, the battery is relatively stable. However, if the battery charging voltage is too low (such as less than 4.15v), it will seriously affect the battery's charging capacity. For example, when the battery charging voltage is controlled at 4.13v, the charging capacity of the battery is about 60-80% of the battery capacity, which has a great impact on the performance of the battery. Consequences of overcharging lithium polymer batteries Lithium polymer batteries cannot be overcharged. If overcharge has a great impact on battery performance, metallic lithium will be deposited on the negative electrode, causing the battery to explode or catch fire. At the same time, the solvent in the electrolyte will decompose, causing serious damage to the battery performance. Polymer lithium ion battery charging method At present, the charging mode of polymer lithium ion battery usually adopts constant current and constant voltage charging: the battery uses constant current to charge CC for the first time. When the battery voltage rises to a certain value (4.2v), and the voltage remains unchanged, the current passing through the circuit is very small, and it eventually drops when it tends to zero. Polymer batteries are easy to use, so we must take good care of them, charge them scientifically, and extend battery life! Statement: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete the previous one: The output of lithium-ion batteries continues to rise , The future is bright