What is the standard charging voltage of a 3.7v lithium battery

What is the standard charging voltage of a 3.7v lithium battery? What standard voltage should a 3.7V lithium battery use for charging? A single-cell 18650 lithium ion battery is usually used in radios or flashlights. When charging some batteries without a protection board, you need to control the standard of the charging voltage by yourself. , 3.7V battery, charge cut-off voltage 4.2V, 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. 1. Floating charge. Refers to charging while working online. This method is often used in standby power supply occasions. If it is lower than 12 volts, it will not charge, and if it is too high, it will affect the circuit operation. Therefore, the voltage is 13.8 volts during floating charge operation. 2. Cycle charging. Refers to the full charge to restore the capacity of the battery. When it is full, the charger is measured without disconnecting it. It is generally around 14.5 volts, and the maximum is not more than 14.9 volts. After disconnecting the charger for 24 hours, it is generally around 13V to 13.5V. About 12.8 to 12.9 volts after a week. The specific voltage value of different batteries is different. The usual lithium battery cell is 3.7v, the voltage is 4.2v when fully charged, the nominal voltage after series connection is only 7.4v, 11.1v, 14.8v... the corresponding full voltage (that is, the charger no-load output voltage) is 8.4v, 12.6v, 16.8v... can't be an integer of 12v, just like the lead-acid battery is 2v every other time, the full charge is 2.4v, and the corresponding only nominal 6v, 12v, 24v... full voltage (The same is the output voltage of the charger) are 7.2v, 14.4v, 28.8v... I don’t know what kind of lithium battery you are? The 18500 battery is a more widely used cylindrical lithium battery and can be used in electronic cigarettes. Toys, security, automotive and other electronic fields. Companies with mature battery cell technology include BAK, Tiansheng, Huayuebao and other manufacturers with stable performance. The definition rule of its model is: For example, the 18650 type means that the battery has a diameter of 18mm and a length of 65mm. The 18500 battery has a diameter of 18mm and a length of 50mm, and a cylindrical battery. Voltage: 3.6V (conventional universal battery, used for electronic products, low-power electrical equipment, maximum 1C discharge. Discharge conditions can be changed according to the situation) 3.2V (power battery can be customized according to the situation) Charging parameters: 4.2V minimum discharge termination voltage is general It is: 2.75V Maximum charge termination voltage: 4.20V (Sanyo, Samsung, Panasonic, Tiansheng TS/the latest large-capacity 18500 charge termination voltage is 4.35V) Capacity: 3.6V Lithium cobalt oxide is now technology 1900AMH (according to Tiansheng) Shengweiye Technology Department) Diameter: 18±0.2 Battery Specification Chart Battery Specification Chart The minimum discharge termination voltage is generally: 2.75V 18650 lithium battery Maximum charge termination voltage: 4.20V (Sanyo, Samsung, Panasonic's latest high-capacity 18650 charge termination voltage 4.35V) Height: 50±0.3 Common combination parameter editing combination method: ICR18500-4S2P Nominal voltage: 14.8V Output voltage range: 10~16.8v Nominal capacity: 3000mAh Standard continuous discharge current: 0.2C Maximum continuous discharge current: 1C working temperature: charging: 0~45℃ discharge: -20~60℃ product size: MAX35*54*83mm finished product internal resistance: ≤250mΩ lead type: national standard line UL1007/18#, line length 150mm protection parameters: overcharge protection Voltage/Each string 4.25±0.025V over-discharge protection voltage 2.5±0.08V over-current value: 4~8A charger selection edit standard charging: the battery is first charged to 4.2V with a constant current of 0.5C5A (1.5A), when charging When the current is gradually reduced, charge it with 4.2V constant voltage until the current is reduced to 0.01C5A, and the charging time is about 3 hours. There should be no permanent damage to the rechargeable battery within 0~45℃. Standard discharge: After a fully charged 18500 battery is placed in an ambient temperature of 20±5°C for 30 minutes, it is discharged to 6.0V at a constant current of 0.2C5A, and the discharge time is about 5 hours. Therefore, it is suitable to choose 4.2V/1A lithium battery charger. 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 article: Silicon is the highest known anode material for lithium-ion batteries.