What is the voltage of a 12-volt battery?

12 volt battery charging voltage: 12.6V for 3 segments and 16.8V for 4 strings.

[Specific introduction]:

1, floating charge. Refer to the charging while working online. This method is often used in standby power applications. Less than 12 volts can't be charged, and too much is too high to affect the circuit. Therefore, when the floating charge is working, the voltage is 13.8 volts.

2. Cycle charging. Refers to the fully charge of the recovery capacity of the battery. When fully charged, the charger is not disconnected, generally at around 14.5 volts and no more than 14.9 volts. After disconnecting the charger for 24 hours, it is generally around 13 volts to 13.5 volts. It is about 12.8 to 12.9 volts a week later. The specific voltage values of different batteries vary.

The usual lithium battery cell is 3.7v, the voltage is 4.2v when fully charged, and the nominal voltage after series 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... It is impossible to be a 12v integer, just like the lead acid storage battery is every 2v, the full is 2.4v, the corresponding only the nominal 6v, 12v, 24v... full voltage (The same is the charger output voltage) are 7.2v, 14.4v, 28.8v... I don't know if you are a lithium battery.

The lead-acid power battery for electric vehicles has an open circuit voltage of about 13.3V at full power and a battery starting battery of about 12.8V at full power.

The open circuit voltage varies depending on the type of lead acid battery. The above voltage value is a measured value when it is left to stand for 12 hours after being fully charged.

The 12v lithium battery is connected in series with 3 or 4 lithium batteries. Synthetic battery packs. The capacity of the battery is determined by the capacity of a single battery cell or the capacity of a battery connected in parallel. It is a new type of battery that is safe and environmentally friendly.

12V battery : According to the material classification, it can be divided into: 12V lithium battery , 12V lead acid battery, 12V nickel hydrogen hydride nickel cadmium battery, 12V alkaline battery. 12 lithium battery, is composed of three 3.7V lithium batteries in series, the voltage of a single lithium battery after full charge is 4.2V, generally called 4V, the voltage of the series battery is added, both: 4V / battery * 3 The electricity is also = 12V, which is what we call the 12V lithium battery, the combination is as shown below

Combination method: ICR18500-3S2P

Nominal voltage: 11.1V

Discharge voltage: 11.1V-12.6V

The normal discharge current is: 0-2A, large capacity is 3-4A

Nominal capacity: in MahA, in a variety of sizes

Standard continuous discharge current: 0.2C

Maximum continuous discharge current: 1C

Working temperature: Charging: 0~45°C

Discharge: -20~60°C

Product size: MAX39*56.6*99mm

Finished product internal resistance: ≤280mΩ

Standard weight:

Protection board: IC-S8254AAJ+MOS-AO4409

Lead type: JST-VHR-2P forward plug UL1007/24# line, line length 100mm

Protection parameters:

Overcharge protection voltage / 4.35 ± 0.025V per string

Over-discharge protection voltage 2.4±0.08V

Overcurrent value: 10~25A

12V lithium battery specifications:

Voltage: 12V

Battery capacity: Capacity does not have standard capacity. It is determined according to the specific requirements of electrical appliances or equipment. The general capacity is 2200ma/h, 5AH, 10Ah, and some electric vehicles can reach 20AH or 50AH. The more you have, the bigger the capacity. According to the physics formula: in the parallel circuit: I total = I1 + I2 + I3 [1]

Volume: The volume of a 12V lithium battery is determined by the capacity of the battery. There is no uniform specification. The larger the battery capacity, the larger the volume

Weight: Many devices now require large capacity and lighter weight lithium batteries, such as electric vehicles. Previously, lead-acid batteries were used. Nowadays, many electric vehicles have become lithium batteries, because lithium batteries have large capacity, light weight and small size.

Charge and discharge current: The charge and discharge current of a lithium battery is determined according to the power of the device. The electric power formula is: P=UI[1]. Based on constant voltage, the larger power of the device, the larger current is.

12V lithium battery use: electric vehicles, power tools, notebooks, mobile DVD, UPS, GPS, medical equipment, etc.

The 12V battery is a 2VX6 grid lead-acid battery!

The cell's single cell full voltage can reach 2.2V-2, 4V! 12V full total no-load voltage can reach 13.2V-14.4V!

In other words, the charging voltage should be 14-16V!

Also depends on the actual situation! If the battery capacity is much lower than the charger's power! The charging voltage can be lower! Otherwise, it is higher!

In general, one condition must be met! That is, the charging current should not be higher than 1/10 of the battery safety time! Do not lower than 1/5!