What is the standard charging voltage for 3.7v lithium batteries? 3.7V lithium batteries should be charged with what standard voltage, single 18650 lithium-ion batteries are usually used in radios or flashlights, to charge some of the batteries without protection plates, you need to control the charging voltage standard.
For 3.7V batteries, the charge cutoff voltage is 4.2V and the discharge cutoff voltage is 3.0V, so when the battery open circuit voltage is below 3.6V, it should be ready for charging. It is better to use 4.2V constant voltage charging mode, you can not pay attention to the charging time. Charging with 5V is prone to dangerous overcharging.
1、Floating charge. Refers to online charging while working. This way is often used in the backup power supply occasions. Lower than 12 volts can not be charged, too high to affect the work of the circuit. Therefore, the floating charge works with a voltage of 13.8 volts.
2、Cycle charging. Refers to the battery to restore the capacity of the full charge, full, constantly open the charger to measure, generally at about 14.5 volts, the highest does not exceed 14.9 volts. After disconnecting the charger for 24 hours, generally at about 13 volts to 13.5 volts. After a week about 12.8 to 12.9 volts. The specific voltage value varies from battery to battery.
A typical lithium battery is 3.7v on its own, 4.2v when filled, and only 7.4v, 11.1v, 14.8v nominal voltage when connected in series... The corresponding full voltage (that is, the charger no-load output voltage) is 8.4v, 12.6v, 16.8v... It is impossible to be 12v integer, just like the lead-acid battery is 2v per interval, full is 2.4v, the corresponding only nominal 6v, 12v, 24v... Full voltage (also the charger output voltage) are 7.2v, 14.4v, 28.8v... I do not know what kind of lithium battery you are?
18500 battery is a cylindrical lithium battery in the more widely used batteries, can be used in electronic cigarettes, toys, security, car and other electronic fields.
The core technology of mature enterprises are BAK, Tiansheng, Huayuebao and other manufacturers, stable performance. The definition of the model law: such as 18650 type, that is, the diameter of the battery is 18mm, the length of 65mm, 18500 battery diameter is 18mm length of 50mm, cylindrical type of battery.
Voltage: 3.6V (regular general-purpose battery, used in electronic products for small power power 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 generally: 2.75V maximum charge termination voltage: 4.20V (Sanyo, Samsung, Panasonic, Tiansheng TS / the latest out of the large-capacity 18500 charge termination voltage of 4.35V)
Capacity: 3.6V lithium cobaltate now technology to do 1900AMH (according to Tiansheng Weiye technical department)
Diameter: 18±0.2
Battery specification diagram
Battery specification diagram
Minimum discharge termination voltage is generally: 2.75V
18650 type lithium battery
Maximum charge termination voltage: 4.20V (Sanyo, Samsung, Panasonic's latest high-capacity 18650 charge termination voltage is 4.35V)
Height: 50±0.3
Common combination parameters edit
Combination mode: 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
Operating temperature: Charging: 0~45℃
Discharge: -20~60℃
Product size: MAX35*54*83mm
Finished product internal resistance: ≤250mΩ
Lead wire type: National standard wire UL1007/18#, wire length 150mm
Protection parameters.
Overcharge protection voltage / 4.25±0.025V per string
Over discharge protection voltage 2.5±0.08V
Overcurrent value: 4~8A
Charger selection editor
Standard charging: The battery is first charged to 4.2V with a constant current of 0.5C5A (1.5A), and then charged to 4.2V with a constant voltage when the charging current gradually decreases until the current decreases to 0.01C5A, and the charging time is about 3 hours. There should be no permanent damage to the charged battery within 0~45℃.
Standard discharge: After a fully charged 18500 battery is set aside for 30 minutes at an ambient temperature of 20±5℃, 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 Li-ion battery charger.
We are Manly battery Co., Ltd, a professional Lithium battery manufactuerer, if you have requests or queries on batteries, please feel free to contact info@manlybattery.com
