2.5AH X 40 CELLS BRACKET

This component is a specialized plastic battery holder or bracket used for assembling large 18650 Lithium-Ion battery packs, ensuring proper alignment, stability, and thermal management.

1. Nomenclature: The designation "20 X 2" describes the structural dimensions of the array:

   • 20: Refers to the number of cells arranged along the longest axis (the "length" of the array).

   • 2: Refers to the number of cells arranged along the shortest axis (the "width" or "rows" of the array).

2. Total Cells: This bracket configuration holds a total of $20 \times 2 = 40$ individual 18650 battery cells.

3. Pack Structure: This type of bracket is essential for defining the electrical configuration of the final battery pack:

   • Series (S): The number of cells connected in series determines the nominal voltage of the pack.

   • Parallel (P): The number of cells connected in parallel determines the total Amp-hour capacity.

• Mechanical Stability: The bracket firmly holds the cells in place, preventing movement and damage from vibration, which is crucial in applications like power tools or e-bikes.

• Thermal Management: It introduces precise spacing between the cells. This small gap is vital for allowing air flow (or liquid cooling channels) around the entire surface of each cell, which is essential for dissipating heat and preventing thermal runaway, a key safety consideration for the EVE Li-ion cells.

• Welding and Assembly: The integrated holes and slots guide the nickel strips used for spot-welding the cells together, ensuring accurate and consistent electrical connections (e.g., connecting a 2P array in series 20 times to form a 20S2P pack).