Electric Hand Tool Battery Distribution Segmentation
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Solution Overview
Problem
Existing electric hand tools with accumulator-based energy supplies face challenges in balancing power requirements and size, with limited performance due to the space-consuming accumulator unit and limited battery cells, affecting handling and efficiency.
Innovation Solution
The electric hand tool design incorporates a bow-shaped two-hand grip with accumulator cells arranged in the handle and additional handle, allowing for flexible power supply adjustment, easy handling, and wireless charging, using Li-ion cells and a modular design for easy maintenance and balanced weight distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the number of accumulator cells is increased to meet high power requirements, then the power performance is improved, but the space occupied by the accumulator unit increases
Solution Approach 1:
The accumulator unit is divided into two separate handles (first handle and second handle), each containing a subset of accumulator cells. This segmentation allows the power supply to be distributed across two handles rather than concentrating all cells in one location, thereby meeting high power requirements while managing the spatial occupation more effectively.
2Power
If the accumulator unit is made larger to accommodate more battery cells, then the power capacity is improved, but the handling and ergonomics deteriorate
Solution Approach 1:
By distributing accumulator cells across two separate handles, the weight and bulk of the power supply are divided. This segmentation improves ergonomics and handling by preventing excessive concentration of mass in one location, while still providing the required power capacity through the combined cells in both handles.
Solution Approach 2:
The invention allows for different numbers of accumulator cells to be placed in each handle (first handle may have more cells than the second handle or vice versa), enabling optimization of weight distribution and balance based on specific ergonomic requirements while maintaining the necessary total power capacity.
3Ease of operation
If the same number of accumulator cells are placed in both handles, then the tool is well-balanced for handling, but the power capacity may be insufficient for high-power applications
Solution Approach 1:
The invention explicitly allows for asymmetric distribution of accumulator cells between the two handles, with the first handle potentially containing a different number of cells than the second handle. This enables optimization of power capacity for high-power applications while still maintaining acceptable balance and handling characteristics through strategic placement.
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 handling and performance by allowing flexible power adjustment, easy charging, and maintenance, while maintaining a balanced and lightweight tool with improved user safety and cost-effectiveness.
Implementation Method 1
at least four Li-ion accumulator cells (38, 38a) are accommodated in the bow-shaped two-hand grip (14)
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
An electric hand tool, in particular a boring and/or chisel hammer having a battery-based power supply is proposed. The electric hand tool comprises a machine housing (12) with a handle (16) and at least one additional handle (18). The battery-based power supply has several battery cells (38, 38a) which are housed in the handle (16) and/or in the additional handle (18).