12.6 V for 3 cells, 16.8 V for 4 strings. Floating charge. Refers to recharging when working online. This method is often used in emergency power situations. It cannot be charged if it is lower than 12 volts and it will affect the operation of the circuit if it is too high. Therefore, when floating charging is working, the voltage is 13.8 volts.
Main principles
1. Lithium battery: It adopts a spiral winding structure and uses very thin and highly permeable polyethylene film insulation material to separate the positive and negative electrodes.
2. Dry battery: the carbon rod is used as the positive electrode and the zinc cylinder is used as the negative electrode, which converts chemical energy into electrical energy and supplies it to the external circuit. In chemical reactions, as zinc is more active than manganese, zinc loses electrons and oxidizes, while manganese gains electrons and is reduced.
Lithium battery charging temperature range
12V lithium batteries generally use lithium iron phosphate batteries. The nominal voltage of a single battery is 3.0V and is 3.65V after fully charged. Four batteries are connected in series. That is, 3.0*4 = 12V, after fully charged, it is a 14.6V lithium battery.
The 12V lithium battery .6V is generally lithium cobalt oxide material or ternary material lithium battery, the rated voltage. of a single battery is 3.7 V, after full charge it is 4.2 V
4.2 V*3 = 12.6 V
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Voice content:
Hello everyone, I'm Time Fortune's Intelligent Customer Service RepresentativeNetwork, I will answer the questions above for you. The charging voltage range of 12V lithium battery is 12.6V for 3 cells and 16.8V for 4 cells. Lithium batteries usually have protective plates, so the charging voltages are also different. For a single load (without protective plates), each cell is 3:7 V, or 4.2 V when connected in series, the voltage is superimposed by analogy.
Lithium batteries are batteries that use lithium metal or lithium alloy as the anode material and use a non-aqueous electrolyte solution. The difference between lithium batteries and lithium-ion batteries is that the former is a primary battery and the latter is a rechargeable battery. Since the chemical properties of lithium metal are very active, the processing, storage and use of lithium metal have environmental requirements.very high, so lithium batteries have not been used for a long time. With the development of microelectronic technology in the late 20th century, the number of miniaturized devices has increased day by day, placing high demands on power supplies. Lithium batteries then entered a phase of large-scale practical use. Since Apple launched smartphones, then tablets, in 2007, the world has entered the era of intelligence. The strong demand for smartphones and tablets has rapidly promoted the sales of digital lithium batteries, among which mobile phone lithium batteries account for the largest sales volume.