What is the voltage of the lithium battery during operation?

Working voltage of lithium battery pack The voltage range of lithium battery pack is generally 3V-4.2V, and the voltage of lithium battery pack is determined by the electrode potential. Voltage, also known as potential difference or potential difference, is a physical quantity that measures the energy difference of electric charges in an electrostatic field due to different potentials. The electrode potential of lithium ions is about 3V, and the voltage of lithium batteries varies with different materials. For example, a general lithium battery has a rated voltage of 3.7V and a full-charge voltage of 4.2V; while a lithium iron phosphate battery has a rated voltage of 3.2V and a full-charge voltage of 3.65V. In other words, the potential difference between the positive electrode and the negative electrode of a lithium battery in practical use cannot exceed 4.2V, which is a requirement based on the safety of materials and use. For example, the platform voltage of a nominal 3.7V lithium battery is around 3.7V, and the platform voltage of a nominal 3.2V lithium iron battery is around 3.2V. Lithium battery standard 3.7V or 4.2V are the same. It's just that the manufacturer's label is different. 3.7V refers to the platform voltage when the battery is discharged during use, and 4.2V refers to the voltage when the battery is fully charged. Common rechargeable 18650 lithium batteries, the voltage is standard 3.6 or 3.7v, when fully charged is 4.2v, this has nothing to do with the power, the mainstream capacity of 18650 batteries from 1800mAh to 2600mAh, the mainstream capacity even has a standard 3500 Or more than 4000mAh. What is the voltage range of the lithium battery? The nominal voltage of a single lithium battery is 3.7V, and the normal voltage range is 2.5V-4.25V. Generally, a 3.7v lithium battery must have a protection board for overcharge and overdischarge. If the battery does not have a protection board, only a charging voltage of about 4.2v is used, because the ideal full charge voltage of a lithium battery is 4.2v, and the battery may be damaged if the voltage exceeds 4.2v. , Use this method to charge while monitoring the condition of the battery at all times. The charge cut-off voltage of the 3.7V battery is 4.2V, and the discharge cut-off voltage is 3.0V. Therefore, when the open circuit voltage of the battery is lower than 3.6V, it should be able to charge. It is best to use 4.2V constant voltage charging mode, you don't need to pay attention to the charging time. Charging with 5V is prone to danger of overcharging. Lithium battery charging control is divided into two stages. The first stage is constant current charging. When the battery voltage is lower than 4.2V, the charger will charge with a constant current. The second stage is the constant voltage charging stage. When the battery voltage reaches 4.2V, due to the characteristics of lithium batteries, if the voltage is higher, it will be damaged. The charger will fix the voltage at 4.2V and the charging current will gradually decrease. When it is reduced to a certain value (generally 1/10 of the set current), the charging circuit is cut off, the charging completion indicator lights up, and the charging is completed. 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: Which is safer, lithium iron phosphate battery or lithium cobalt oxide battery?