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How many strings is the 48V20AH lithium-ion battery pack? How to calculate the number of strings and parallel connections required for a set of lithium-ion batteries? Series parallel connection of lithium-ion batteries is particularly common in some PACK factories. Generally, lithium-ion battery packs are composed of batteries in series parallel connection, which can be assembled into lithium-ion battery packs of any voltage capacity.

How many strings is the 48V20AH lithium-ion battery pack?

When assembling lithium iron phosphate battery packs, different capacities and voltages are generally achieved through parallel or series connection. In a lithium-ion battery pack, multiple lithium-ion batteries are connected in series to obtain the desired operating voltage. If higher capacity and greater current are required, then lithium-ion batteries should be connected in parallel.

Lithium ion battery pack 48V20AH All lithium-ion battery packs are composed of individual lithium-ion batteries, which are connected in series or parallel; The way to add voltage is to connect lithium-ion batteries in series and add the voltages together;

The lithium-ion battery pack 48V20AH is generally 3.5V for individual lithium-ion batteries. Therefore, the 48V lithium-ion battery pack requires 48/3.5=13.7, and 14 batteries can be connected in series.

If the manufacturer has already supplied a set of 12V lithium-ion batteries, then four can be connected in series. As long as the output voltage is 48V and the current is 2A or 4A, it is acceptable. If it takes about ten hours to fully charge 2A, this is when there is still a certain amount of power in the battery. If you buy a 4A, reduce the time by half and fill it up in about five hours.

How to calculate the number of strings and parallel connections required for a set of lithium-ion batteries?

Calculation method one:

It's very simple. Series connection increases voltage, parallel connection increases capacity. The standard for ternary lithium-ion batteries stipulates a voltage of 3.7V, full charge of 4.2V, and three connections are 12V. 48V requires four triple connections. However, lead-acid batteries for electric vehicles have the most fully charged 58V, so lithium batteries must also be around 58V. This requires 14 connections to 58.8V, multiplied by 4.2. When iron lithium is fully charged, it must be around 3.4V, and four connections must be 12V. For 48V, it must be 16 connections, and so on. For 60V, it must be 20 connections, with the same model and capacity in parallel. Two parallel connections of 10Ah battery cells are 20Ah, and for 48V, three element lithium must be 14+14. The last 14 parallel connected battery cells form a 48v20Ah lithium-ion battery.

Calculation method 2:

In fact, it is very simple. For example, 48 volts usually refers to voltage. Generally speaking, ternary lithium-ion batteries refer to 48 divided by 3.7. Thirteen and fourteen strings are basically considered 48 volts. Thirteen strings are charged using a 54.6 volt battery charger, while fourteen strings are charged using a 58.8 volt battery charger. So much so that 20 ampere hours usually refers to the capacity of the battery. If a single 18650 cell has a capacity of only 2000 milliamperes per cell, it would be 2 ampere hours per cell. Ten cells together would be 20 ampere hours, and the entire battery set would be 14 series multiplied by 10 cells=140 cells.

Summary: Series connection and parallel connection have their own advantages for lithium iron phosphate batteries. The purpose of series and parallel connection of lithium-ion battery packs varies due to different methods. Therefore, in actual use, it can be freely determined according to the desired goal, which can be set individually or combined in two ways to achieve the final goal.

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