Battery Cell Damping Inserts for Vibrational Protection
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Solution Overview
Problem
Battery packs in electric vehicles experience damaging vibrational forces due to motion, which can cause battery cells to malfunction or be damaged, necessitating an adaptive configuration to accommodate these forces.
Innovation Solution
A battery pack design incorporating damping inserts made from flexible materials like rubber or metal alloys, positioned between battery cells and the housing, to absorb and dissipate vibrational forces, ensuring continued operation and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If battery cells are rigidly mounted in the battery housing, then structural stability is improved, but vulnerability to vibrational damage increases
Solution Approach 1:
A damping insert made of viscoelastic material is introduced as an intermediary element between the battery cell and the battery housing. This damping insert absorbs and dissipates vibrational energy, protecting the battery cell from harmful vibrations while maintaining structural stability. The damping insert acts as a mediator that decouples the rigid connection between the battery cell and housing, allowing relative motion while providing damping.
Solution Approach 2:
The damping insert is constructed from composite materials, specifically a viscoelastic core layer sandwiched between two rigid skin layers. This composite structure combines the vibration-absorbing properties of viscoelastic materials with the structural integrity of rigid outer layers, creating a multi-functional component that provides both mechanical support and vibration damping.
2Object-affected harmful factors
If damping inserts are added to protect battery cells from vibrations, then protection from vibrational damage is improved, but device complexity increases
Solution Approach 1:
The damping insert combines multiple functions into a single component: it provides vibration damping, mechanical support, and thermal management interface. By merging these functions into one integrated part rather than using separate components, the design protects battery cells from vibrations without proportionally increasing device complexity.
Solution Approach 2:
The damping insert utilizes a thin-walled structure with viscoelastic material that provides flexible vibration absorption. The thin-film design allows the damping insert to conform to the battery cell geometry while maintaining effective damping properties, minimizing the added complexity and space requirements.
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 damping inserts effectively reduce the impact of vibrational forces on battery cells, enhancing their durability and maintaining normal operation during vehicle motion, acceleration, and deceleration by providing a flexible interface between the cells and the housing.
Implementation Method 1
A plurality of damping inserts are each arranged within a respective one of the plurality of receptacles and are positioned between a respective one of the plurality of battery cells and the battery housing
Implementation Method 2
The plurality of damping inserts are formed from a material having greater flexibility than a material of the battery housing and having a higher damping coefficient than the material of the battery housing
Data Source
AI summary
A battery pack including a plurality of battery cells and a battery housing defining a plurality of receptacles each configured to support a respective one of the plurality of battery cells is provided. A plurality of damping inserts are each arranged within a respective one of the plurality of receptacles and positioned between a respective one of the plurality of battery cells and the battery housing.