What is the full charge voltage of a 12 volt sigmasTek battery
12V battery charging voltage: 12.6V for 3 sections, 16.8V for 4 strings.
[Specific Introduction]:
1. Floating charge. Refers to charging while working online. This method is often used in standby power supply situations. If it is below 12 volts, it cannot be charged, and if it is too high, it will affect the operation of the circuit. Therefore, when floating charge is working, the voltage is 13.8 volts.
2. Cyclic charging. It refers to fully charging the battery to restore its capacity. When fully charged, it is measured with the charger continuously turned on, generally around 14.5 volts, with a maximum of not more than 14.9 volts. After disconnecting the charger for 24 hours, it is typically between 13 volts and 13.5 volts. About 12.8 to 12.9 volts after a week. The specific voltage values of different batteries vary.
A typical lithium battery cell is 3.7v, with a full charge voltage of 4.2v. After being connected in series, the nominal voltage is only 7.4v, 11.1v, 14.8v... The corresponding full charge voltage (i.e., the no-load output voltage of the charger) is 8.4v, 12.6v, 16.8v... It cannot be an integer of 12v, just like a lead acid battery battery with an interval of 2v, full charge voltage is 2.4v, and the corresponding nominal voltage is only 6v, 12v, 24v The full charge voltage (also the charger output voltage) is 7.2v, 14.4v, 28.8v... I wonder what kind of lithium battery you are
The open circuit voltage of lead-acid power batteries for electric vehicles is about 13.3V at full charge, and that of automotive starting batteries is about 12.8V at full charge.
The open circuit voltage of lead acid batteries varies depending on the type. The above voltage values are measured when fully charged and left standing for about 12 hours.
A 12V lithium battery consists of three or four lithium batteries connected in series. The combined battery pack, whose capacity is determined based on the capacity of a single cell or the capacity of batteries connected in parallel, is a new type of safe and environmentally friendly battery.
12V batteries: According to material classification, they can be divided into 12V lithium batteries, 12V lead-acid batteries, 12V nickel hydrogen nickel cadmium batteries, and 12V alkaline batteries. A 12 volt lithium battery is a series combination of three 3.7V lithium batteries. After a single lithium battery is fully charged, the voltage is 4.2V, commonly referred to as 4V. The voltage of the series batteries is added, i.e., 4V/battery * 3 batteries and=12V, which is what we call a 12V lithium battery. The combination method is shown in the following figure
Combination method: ICR18500-3S2P
Nominal voltage: 11.1V
Discharge voltage: 11.1V-12.6V
Conventional discharge current: 0-2A, large capacity: 3-4A
Nominal capacity: in MahA, available in various sizes
Standard continuous discharge current: 0.2C
Maximum continuous discharge current: 1C
Operating temperature: Charging: 0~45 ℃
Discharge: - 20~60 ℃
Product size: MAX39 * 56.6 * 99mm
Finished product internal resistance: ≤ 280m Ω
Standard weight:
Protection board: IC-S8254AAJ+MOS-AO4409
Lead model: JST-VHR-2P forward plug UL1007/24 # line, line length 100mm
Protection parameters:
Overcharge protection voltage/4.35 ± 0.025V per string
Overdischarge protection voltage 2.4 ± 0.08V
Overcurrent value: 10-25A
Specification parameters of 12V lithium battery:
Voltage: 12V
Battery capacity: There is no standard capacity, which is determined based on the specific requirements of the electrical appliance or equipment. The general capacity is: 2200ma/h, 5AH, 10Ah, etc. Some electric vehicles can have a capacity of up to 20AH, or 50AH. The more batteries are connected in parallel, the greater the capacity. According to the physical formula: In a parallel circuit: Itotal=I1+I2+I3 [1]
Volume: The volume of a 12V lithium battery depends on the capacity of the battery. There is no unified specification. The larger the battery capacity, the larger the volume
Weight: Many devices now require lithium batteries with large capacity and lighter weight, such as electric vehicles. Previously, lead-acid batteries were used, but now many electric vehicles have become lithium batteries because of their large capacity, light weight, and small size.
Charging and discharging current: The charging and discharging current of a lithium battery is determined based on the power of the device. The electric power formula is: P=UI [1]. On the basis of a constant voltage, the greater the power of the device, the greater the current that needs to be output.
12V lithium battery usage: electric vehicles, power tools, notebooks, mobile DVDs, UPS, GPS, medical equipment, etc
The 12V battery is a 2VX6 grid lead acid battery!
The single cell full charge voltage of this type of battery can reach 2.2V-2,4V! The total no-load voltage can reach 13.2V-14.4V when fully charged with 12V!
That is, the charging voltage should be 14-16V!
It also depends on the actual situation! If the capacity of the battery is much lower than the power of the charger! The charging voltage can be lower! On the contrary, it will be higher!
In general, one condition must be met! That is, the charging current should not be higher than 1/10 of the battery ampere hour! Not less than 1/5!