The voltage of four strings of ternary lithium batteries from Pacific Automotive Network is 13.7V, so 14 of them can be connected in series. If the manufacturer provided a set of 12V lithium-ion batteries, simply connect four of them in series.
When lithium iron phosphate ion battery packs are packaged, different capacities and voltages are usually obtained through parallel or series connection. In a lithium-ion battery, several lithium-ion batteries are connected in series to obtain the required operating voltage. If higher capacity and current are required, lithium-ion batteries should be connected in parallel.
48V20AH lithium-ion battery All lithium-ion batteries are composed of single lithium-ion batteries connected in series or parallel; the way to add voltage is to connect lithium ion batteries in series and add the batterye. tensions; lithium ion The 48V 20Ah battery usually has a single 3.5V lithium ion battery, so the 48V lithium ion battery needs 48/3.5 = 13.7, which is only 14 in series.
If the manufacturer has provided a set of 12V lithium-ion batteries, simply connect four of them in series. As long as the output voltage is 48 V and the current is 2 A or 4 A, everything is fine. If it's a 2A battery, it takes about ten hours to fully charge it. This is when there is still some energy left in the battery. If you buy the 4A model, the time will be cut in half and it will be fully charged in about five hours.
How do you calculate the number of series and parallels a set of lithium-ion batteries needs?
Calculation method
1: Very simple, series connection increases the voltage and parallel connection increases the capacity. The standard voltage stipulated for the batteryternary lithium-ion erie is 3.7 V, and when. fully charged, it is 4.2 V. Three strings are 12 V. 48 V requires four strings out of three, but the lead acid battery of the electric vehicle is best charged at 58 V, so the lithium battery must also be d 'around 58 V, so it needs 14 strings. 58.8V, 14 multiplied by 4.2, and the iron-lithium battery is fully charged at 3.4V. Left and right, four strings are required for 12V, 48V requires 16 strings, and so on. following for 60V, 20 strings are needed if the same model. and capacity are connected in parallel, two 10ah batteries in parallel make 20ah For 48v ternary lithium, 14+14 batteries are needed for 10ah battery cells, the last 14 pieces connected in parallel and series form a lithium ion battery 48v20ah.
Calculation method
Two: It's actually very simple. For example, 48 volts generally refers to thetension. Generally speaking, ternary lithium-ion batteries usually refer to 48 divided by 3.7. Thirteen strings and fourteen strings are basically 48 volts. Thirteen strings are charged with a 54.6 volt battery charger and fourteen strings are charged with a 58.8 volt battery charger. So, 20 Ah generally refers to the battery capacity. If a single 18650 battery cell has a capacity of only 2000 mAh, then it is 2 Ah each. Ten batteries combined make 20 Ah. The entire battery is 14 strings times 10. cells = 140 cells.
Summary: Series connection and parallel connection have their own advantages for lithium iron phosphate batteries. Lithium-ion batteries are connected in series and parallel due to different methods and for different purposes. Therefore, in actual use, you can decide freely according to the purposes you want atdye. You can set it alone or use it in two ways to achieve the end goal.
(Images/text/photographs: Pacific Automotive Network Q&A)
How to find the voltage of a single battery module:
< p>1. Three yuan lithium battery: rated voltage 3.7V, capacity varies depending on different cell types. Common voltages for number of strings: single string is 3.7V, 2 strings are 7.4V, 3 strings are 11.1V, 4 strings are 14.8V, and 6 strings are 22 ,2 V.2. Lithium iron phosphate battery: rated voltage 3.2V, capacity varies with different cell types. Common voltages for number of strings: single string is 3.2V, 2 strings are 6.4V, 4 strings are 12.8V, 8 strings are 25.6V, and 16 strings are 51 ,2 V.
3. Battery cells in series: increase voltage, but capacity remains unchanged. For examplethe: two ternary lithium batteries with 186503.7V2500mAH cells are connected in series, the battery voltage is: 3.7*2=7.4V, the capacity remains unchanged at 2500mAH, and the final value is 7.4V2500mAH .
4. Parallel connection of cells: increase capacity but keep voltage unchanged. For example: two ternary lithium batteries with 186503.7V2500mAH cells are connected in parallel, the battery capacity is: 2500*2=5000mAH, the voltage remains unchanged at 3.7V, and the final value is 3.7V5000mAH.
5. The cells are connected in series and parallel at the same time. The same calculation method is used as above.