Battery Pack Frame Structure Using Dampers for Impact and Vibration
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Solution Overview
Problem
Conventional battery packs face challenges in absorbing external vibrations and impacts, leading to reduced durability and stability, while increasing the thickness to improve these aspects results in increased weight and reduced energy density, making them unsuitable for use in vehicles.
Innovation Solution
A battery pack frame structure incorporating a rigid beam with reinforcing members such as viscous or viscoelastic dampers, which are integrated into the lower pack frame and side surface frames to absorb external impacts and vibrations, enhancing durability and rigidity without increasing thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of the battery pack frame is increased to improve durability and stability, then the ability to absorb vibrations and impacts is improved, but the weight and volume of the battery increase
Solution Approach 1:
The patent applies composite materials by combining metal frame structures with viscous or viscoelastic dampers. The dampers are integrated into the frame to create a composite structure that absorbs vibrations and impacts more effectively than metal alone, while maintaining frame thickness and weight at acceptable levels. This resolves the contradiction by providing enhanced durability through material composition rather than increased thickness.
2Reliability
If the thickness of the battery pack frame is increased to improve durability and stability, then the ability to absorb vibrations and impacts is improved, but the energy density of the battery decreases
Solution Approach 1:
By integrating dampers into the frame structure as composite elements, the patent achieves improved vibration absorption without increasing overall frame thickness. This allows the battery pack to maintain its original volume and weight, thereby preserving energy density while enhancing durability through the combined properties of metal and damping materials.
3Strength
If conventional metal frame structure is used, then structural strength is maintained, but the ability to absorb vibrations and impacts is limited
Solution Approach 1:
The patent merges the structural function of the metal frame with the vibration absorption function of viscous or viscoelastic dampers. By combining these two elements into an integrated frame structure, the system simultaneously achieves structural strength from the metal and vibration/impact absorption from the damper materials, resolving the contradiction between strength and harmful factor resistance.
Solution Approach 2:
The integration of damper materials into the metal frame creates a composite structure that exhibits both the structural properties of metal and the energy dissipation properties of viscous/viscoelastic materials. This composite approach enables the frame to maintain strength while effectively absorbing vibrations and impacts that would otherwise damage the battery pack.
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 proposed structure effectively absorbs external vibrations and impacts, improving the battery pack's durability and rigidity while maintaining energy density and efficiency, making it suitable for use in vehicles.
Implementation Method 1
the rigid beam is formed of at least one reinforcing member including a viscous damper or a viscoelastic damper
Implementation Method 2
the rigid beam is formed of at least one reinforcing member including a viscous damper or a viscoelastic damper
Data Source
AI summary
A battery pack includes a lower pack frame on which a plurality of battery modules are mounted; an upper pack frame located in the upper part of the plurality of battery modules; and a rigid beam included in the lower pack frame, wherein the rigid beam is formed of a reinforcing member including a viscous damper or a viscoelastic damper.