Tool Battery Protective Shell Sandwich Damping Design
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Solution Overview
Problem
Existing protective shells for hand-held tool batteries are bulky and heavy, leading to user-unfriendliness and a high risk of the battery housing breaking upon impact, as they fail to effectively distribute tension concentrations and absorb impact energy.
Innovation Solution
A protective shell with a sandwich construction comprising a rigid outer shell and a softer, more elastic intermediate damping layer, which distributes impact forces and reduces the likelihood of the battery housing breaking, while maintaining a thin and lightweight design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective shell is made bulky and heavy to protect against impacts, then protection against external environmental influences is improved, but user-friendliness deteriorates
Solution Approach 1:
The protective shell is divided into two functional segments: an outer shell for structural protection and an intermediate damping layer for impact absorption. This segmentation allows each layer to be optimized for its specific function while keeping the overall structure lightweight and user-friendly.
Solution Approach 2:
The protective shell uses a composite structure combining a rigid outer shell material with a softer intermediate damping layer material. This composite approach provides effective impact protection while maintaining a lightweight design that does not compromise user-friendliness.
2Strength
If a protective shell is made very thick to prevent housing breaking, then protection against impacts is improved, but device weight and bulk increase
Solution Approach 1:
The intermediate damping layer is positioned between the outer shell and the tool battery housing to provide beforehand cushioning. This layer absorbs impact energy before it reaches the housing, preventing breaking while keeping the shell thickness minimal and weight low.
Solution Approach 2:
The protective shell applies local quality by using different material properties in different layers: the outer shell uses rigid material for structural integrity, while the intermediate layer uses softer material specifically at the impact interface to absorb energy efficiently with minimal thickness.
3Strength
If a protective shell uses a rigid structure to provide wear resistance, then wear resistance is improved, but impact energy absorption deteriorates
Solution Approach 1:
The intermediate damping layer acts as an intermediary between the rigid outer shell and the tool battery housing. It mediates the impact energy by absorbing and dissipating it through deformation, preventing energy transfer to the housing while the rigid outer shell maintains wear resistance.
Solution Approach 2:
The protective shell utilizes parameter changes in material properties across different layers: the outer shell maintains high rigidity for wear resistance, while the intermediate layer uses lower rigidity and higher elasticity to optimize impact energy absorption, creating a gradient of mechanical properties.
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
The solution effectively minimizes the probability of the tool battery housing breaking and reduces the input of impact energy into the battery cells, providing enhanced wear resistance and user-friendliness by distributing tension peaks over a larger surface area.
Implementation Method 1
the intermediate layer being configured softer and/or more elastic than the outer shell
Implementation Method 2
an intermediate layer (2) acting as a damping layer
Data Source
AI summary
A protective shell of a tool battery for a hand-held tool battery having a tool battery housing is disclosed. The protective shell of the tool battery is formed in a sandwich construction with an outer shell and an intermediate layer acting as a damping layer. The intermediate layer is configured softer and/or more elastic than the outer shell. The intermediate layer is disposed on the outer shell in such a way that it is disposed between the outer shell and a surface of the tool battery housing when the protective shell of the tool battery is disposed on the tool battery housing.