How to calculate the voltage of a single battery module:
1. Ternary lithium battery: rated voltage 3.7V, capacity varies with 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 example: 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 valuethe 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.