In lithium battery pack the description of "two boxes in total, 4 to 47 strings per box" often appears, which involves the composition structure of battery pack and the way of battery multiple-series connection. This article will discuss the meaning of this description in depth to help readers better understand the composition and working principle of lithium battery pack.

1. Parameter interpretation of "two boxes in total, 4 and 47 strings per box"

1. two boxes in total:

   • two boxes in total means that the entire battery pack consists of two independent battery box, each battery box containing a certain number of battery cells.

2. 4 and 47 strings per box:

   • "4 and 47 strings" in "4 and 47 strings per box" refers to the connection mode of battery cells in each battery box, where:
     • "4 and" means that there are 4 battery cells connected in parallel inside each battery cell;
     • "47 strings" means that these parallel battery cells are connected in series to form 47 batteries in series.

2. Structure diagram of "two boxes in total, 4 and 47 strings per box"

in the above figure, the whole battery pack consists of two battery box, and each battery box is made up of four parallel battery cells connected in series according to 47.

3. Parameter meaning of "two boxes in total, 4 and 47 strings per box"

1. voltage:

   • the total voltage of the battery pack depends on the rated voltage of the battery cell and the number of series connections, because the voltage of each battery cell is fixed, and the more the number of series connections, the higher the total voltage.

2. Capacity:

   • the total capacity of the battery pack depends on the capacity of the battery cells and the number of parallel connections, because parallel connections can increase the total capacity of the battery pack.

3. Power:

   • the total power of the battery pack depends on the power of the battery unit and the number of series connections, which can improve the output power of the battery pack.

IV. Significance of "two boxes in total, 4 and 47 strings per box" in practical application

1. battery Management:

   • through this series-parallel mode, the voltage and capacity distribution inside the battery pack can be better managed, and the overall performance and stability of the battery pack can be improved.

   • Security:

     • reasonable series-parallel structure can reduce the internal voltage gradient of battery pack, reduce the risk of battery failure and improve safety.

   • Performance Optimization:

     • through reasonable series-parallel structure design, the performance index of battery pack can be optimized, and the mileage and power performance of the vehicle can be improved.

"Two boxes in total, 4 and 47 strings per box" is an important parameter describing the composition structure of lithium battery pack and the mode of battery multiple-series connection, which is of great significance for understanding the working principle and performance of battery pack. Through reasonable series-parallel design, the performance, safety and stability of battery pack can be optimized.