Prismatic Battery Cell Layout for Shorter Electrolyte Infiltration
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Solution Overview
Problem
In prismatic batteries with flat wound cells, the electrolyte infiltration path is lengthened due to the winding direction being perpendicular to the cell's length direction, making it difficult for the electrolyte to enter the cell effectively.
Innovation Solution
The cell design features a main body with a width direction perpendicular to the plane of the winding direction, allowing the electrolyte to enter from the end faces, thereby shortening the infiltration path and improving infiltration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the winding direction of the cell is perpendicular to its length direction, then the cell structure is simplified and easier to manufacture, but the infiltration path of the electrolyte is lengthened, making it difficult for the electrolyte to enter the cell effectively
Solution Approach 1:
The patent changes the orientation relationship between the winding direction plane and the cell length direction. Instead of having the winding direction perpendicular to the length direction, the patent positions the width direction (which is perpendicular to the winding direction plane) along the length direction of the cell. This dimensional reconfiguration shortens the electrolyte infiltration path while maintaining the flat wound cell structure.
2Stability of the object's composition
If the electrolyte enters the cell from the end face along the length direction, then the cell structure is maintained, but the infiltration path becomes longer, reducing the infiltration rate and effect
Solution Approach 1:
The patent repositions the end faces of the cell along the width direction instead of the length direction. By making the width direction perpendicular to the winding direction plane and positioning end faces at both ends of the width direction, the electrolyte infiltration path is shortened from the length direction to the width direction, thereby improving infiltration rate while maintaining structural stability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances the electrolyte infiltration rate and effect by reducing the infiltration path length, thereby improving the overall performance of the prismatic battery.
Implementation Method 1
the electrolyte needs to enter the cell in a direction perpendicular to the winding direction of the cell (that is, the electrolyte enters the cell from the end face of the cell) due to the obstruction of the separator and the electrode sheets
Data Source
AI summary
A cell is provided, including a main body formed by winding electrode sheets and a separator. The main body is a flat structure with a length direction and a width direction. The first length L1 of the main body along the length direction is greater than the first width W1 of the main body along the width direction. The width direction of the main body is perpendicular to the plane where the winding direction of the main body is located. The cell has a width direction perpendicular to the plane where the winding direction of the main body is located, thereby shortening the infiltration path of the electrolyte and improving the infiltration rate and infiltration effect of the electrolyte. A prismatic battery is also provided.