Compact Power Tool Battery With Nested Overlapping Cell Rows
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Solution Overview
Problem
Conventional batteries used for powering compact power tools are often cumbersome and fail to deliver sufficient power due to their size constraints.
Innovation Solution
A compact battery design featuring nested rows of battery cells, where each cell's outer circumference overlaps both vertically and horizontally with adjacent cells, allowing for a more compact horizontal length while maintaining or exceeding the power delivery of conventional batteries with fewer cells, and utilizing a conductive chassis for electrical connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If conventional batteries are used to power compact power tools, then the battery can provide power, but the battery becomes cumbersome and interferes with the operation of the power tool due to its size
Solution Approach 1:
The patent applies nesting by arranging battery cells in a nested pattern where the outer circumference of each battery cell overlaps with the outer circumference of adjacent battery cells in both vertical and horizontal directions. This nested arrangement allows multiple battery cells to be packed into a compact configuration, providing sufficient power while reducing the overall battery size to minimize interference with power tool operation.
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement by organizing battery cells in multiple rows and columns with overlapping circumferences in both vertical and horizontal directions. This multi-dimensional configuration maximizes the density of battery cells within the available volume, enabling the battery to deliver desired power while maintaining a compact form factor that does not interfere with power tool operation.
2Volume of moving object
If the battery size is reduced to make power tools more compact, then the power tool becomes more compact, but the battery may not deliver a desired amount of power
Solution Approach 1:
The nested arrangement of battery cells with overlapping outer circumferences allows maximum packing density of multiple cells within a reduced volume. This configuration enables the battery to maintain a compact horizontal dimension while incorporating sufficient battery cells to deliver the desired amount of power, resolving the contradiction between size reduction and power delivery.
Solution Approach 2:
By arranging battery cells in a multi-dimensional nested pattern with overlaps in both vertical and horizontal directions, the patent achieves higher cell density within the same volume. This allows the battery to reduce its horizontal dimension while maintaining adequate power delivery capability through the increased efficient use of three-dimensional space.
3Power
If more battery cells are added to increase power delivery, then the power delivery increases, but the horizontal length of the battery increases
Solution Approach 1:
The nested pattern with overlapping outer circumferences of adjacent battery cells allows multiple cells to be arranged in a compact configuration that minimizes horizontal length. By nesting cells both vertically and horizontally with overlaps, the battery can incorporate more cells for increased power delivery without proportionally increasing the horizontal dimension.
Solution Approach 2:
The patent distributes battery cells across multiple rows and columns in a three-dimensional arrangement with overlaps in both vertical and horizontal directions. This multi-dimensional organization allows the battery to increase power delivery by adding more cells while maintaining a compact horizontal length, as the cells are efficiently packed in the vertical dimension and through overlapping configurations.
Data Source
AI summary
A compact battery for energizing powered devices, such as a power drill, includes a housing that contains a nested row having a plurality of battery cells. Each battery cell has an outer circumference that is offset and overlapping in both a vertical direction and a horizontal direction with the outer circumference of an adjacent battery cell to form the compact battery. Optionally, the compact battery contains 6 battery cells that are electrically connected in series with one another; or 12 battery cells having a first nested row of 6 battery cells that are electrically connected in series with one another, and a second nested row of 6 battery cells that are electrically connected in series with one another. The first and second nested rows of battery cells are electrically connected in parallel with one another, and are nested with one another.