Calculation method I:

It is very simple. The voltage is increased in series and the capacity is increased in parallel. The standard voltage of ternary lithium-ion battery is 3.7v and the battery is fully charged with 4.2v. Three strings are 12v, and 48v must be four three strings. However, the lead acid battery of electric vehicle has the most fully charged 58v, so the lithium battery must also be about 58v. In this way, it must be 14 strings to 58.8v, 14 times 4.2, and the lithium iron battery is fully charged with 3.4v. Four strings must be 12v, 48v must be 16 strings, and so on, 60v must be 20 strings, With the same model and capacity in parallel, two 10ah cells in parallel are 20ah cells. For 48v lithium ternary batteries, 14+14 10ah cells must be connected in parallel. Finally, 14 connected cells in series form 48v 20ah lithium ion batteries.

Calculation method II:

In fact, it is very simple. For example, 48V usually refers to the voltage. Generally speaking, the ternary lithium ion battery usually refers to 48 divided by 3.7. In this way, 13 strings and 14 strings are basically 48V. The 13 strings are charged with a 54.6V battery charger, and the 14 strings are charged with a 58.8V battery charger. So 20 ampere hours usually refers to the capacity of the battery. If a single 18650 cell has a capacity of only 2000 milliamperes, it would be 2 ampere hours for each cell. Ten cells together would be 20 ampere hours. The whole battery would be 14 strings multiplied by 10 cells=140 cells.

Conclusion: Series connection and parallel connection have their own advantages. Because of different methods, the lithium ion battery packs in series and in parallel can achieve different goals. Therefore, in the actual use process, they can be freely determined according to the goals to be achieved. They can be set in a single way or used in combination in two ways to achieve the final goal.

Advantages and disadvantages of lithium-ion batteries. What industry are lithium-ion batteries used in? In the process of battery development, the advantages of lithium ion batteries are more and more, and the scope of use is more and more extensive. It is essential to understand the advantages and disadvantages of lithium ion batteries. At present, from the perspective of market development, the application scope of lithium-ion battery is more and more extensive. At present, lithium-ion battery has gradually expanded to electric bicycles, UPS power storage, electric vehicles and other fields.