How many strings is the 48V20AH lithium battery pack?
When lithium iron phosphate battery packs are assembled, different capacities and different voltages are generally realized in parallel or in series. In the lithium battery pack, multiple lithium batteries are connected in series to obtain the required operating voltage. If what is needed is higher capacity and higher current, then lithium batteries should be connected in parallel.
Lithium battery pack 48V20AH All lithium battery packs are composed of single lithium batteries in series or parallel; the way to increase the voltage is to connect lithium batteries in series, and the voltage is added;
Lithium battery pack 48V20AH generally single lithium battery is 3.5V, so 48V lithium battery pack needs 48/3.5=13.7, just take 14 in series.
If the manufacturer has provided a set of 12V lithium batteries, then 4 can be connected in series. As long as the output voltage is 48V, the current is 2A or 4A. If it is a 2A full charge, it takes about ten hours, this is when there is still a certain amount of power in the battery. If you buy 4A, the time will be reduced by half, and it will be fully charged in five hours.
How to calculate how many strings and parallels are needed for a set of lithium batteries?
Calculation method one:
It’s very simple. The voltage is increased in series and the capacity is increased in parallel. The ternary lithium battery standard specifies a voltage of 3.7v, full of 4.2v, three strings are 12v, 48v requires four three strings, but the electric vehicle lead-acid battery is fully charged with 58v. Therefore, the lithium battery must also be about 58v, so it must be 14 strings to 58.8v, 14 times 4.2, and the iron-lithium full charge is about 3.4v, it must be four strings of 12v, 48v must be 16 strings, and so on, 60v There must be 20 strings in parallel with the same model and the same capacity. Two 10ah batteries in parallel are 20ah, 48v ternary lithium must be 14+14 10ah batteries, and finally 14 parallel connected in series to form a 48v20ah lithium battery.
Calculation method two:
In fact, it is very simple. For example, 48 volts usually refers to voltage. Generally speaking, a ternary lithium battery usually refers to 48 divided by 3.7, so that thirteen strings and fourteen strings are basically 48 volts, and thirteen strings use 54.6 Charged with a volt battery charger, the fourteen strings are charged with a 58.8 volt battery charger. So 20Ah usually refers to the capacity of the battery. If it is a single 18650 cell with a capacity of only 2000mA, then it will be 2Ah each, and ten cells together will be 20Ah. The whole set of batteries is 14 strings multiplied by 10 cells = 140 cells.
Summary: Series and parallel have their own advantages for lithium iron phosphate batteries. Series and parallel lithium battery packs have different methods and achieve different goals. Therefore, in actual use, you can freely determine the goals you need to achieve, and you can set them individually or combine them in two ways. To achieve the ultimate goal.
