Underfloor Battery Pack Upper Case Support for Vibration Damping
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Solution Overview
Problem
Existing battery pack designs struggle to effectively suppress vibrations of the upper case, relying on insulating layers that are insufficient in damping noise, heat, and vibration.
Innovation Solution
The battery pack incorporates a support member to centrally support the upper case, combined with elastic members like rubber, sponge, or springs between the upper case and the lower surface, and additional support structures such as ribs and reinforcements to absorb and distribute vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If insulating layers are provided between the lower surface of the body floor and the upper case of the battery pack, then heat insulation and sound insulation are improved, but vibration suppression is insufficient
Solution Approach 1:
The patent uses a composite structure combining an insulating layer (foam material) and an elastic member (rubber, sponge, or spring) to achieve both insulation and vibration suppression functions simultaneously, resolving the contradiction between thermal/sound insulation and vibration control
2Reliability
If the upper case is supported from below with a support member at the central portion, then vibration suppression is improved, but structural complexity increases
Solution Approach 1:
The support function is segmented into two distinct components: a support member for mechanical support and vibration suppression, and an insulating layer for thermal and acoustic insulation. This segmentation allows each component to specialize in its function while keeping the overall structure manageable
Solution Approach 2:
The elastic member acts as an intermediary between the rigid support member and the upper case, providing both vibration damping and insulation functions, thereby reducing the need for additional specialized components
3Stability of the object's composition
If multiple support members and elastic members are provided in front-rear and width directions, then stability of upper case support is improved, but device complexity increases
Solution Approach 1:
The support system is segmented into multiple support members arranged in the front-rear direction and width direction, with elastic members positioned between adjacent support members. This segmentation provides stable multi-point support while maintaining organizational simplicity
Solution Approach 2:
Adjacent support members and elastic members are merged into integrated support units that work together to provide both mechanical support and vibration damping, reducing the need for separate components and simplifying the overall structure
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 configuration significantly reduces upper case vibrations, enhancing stability and noise insulation while maintaining heat management, thereby improving the overall performance and durability of the battery pack.
Implementation Method 1
an elastic member disposed on a surface of the upper case and sandwiched between the upper case and a lower surface of the floor... by using the elastic member on one side instead of sandwiching the upper case with rigid bodies from both sides, vibrations generated in the upper case can be absorbed by the elastic member
Implementation Method 2
an insulating layer for sound insulation, heat insulation, and vibration damping is provided between the lower surface of a body floor and the upper case of the battery pack
Data Source
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AI summary
The battery pack (200) according to the present disclosure is a battery pack (200) mounted under a floor (102) of a vehicle (100). The battery pack (200) comprises a lower case (300) fixed under the floor (102) and on which a battery stack (900) is placed, an upper case (210) attached to the lower case (300), and a support member (390) extending upwardly from a rigid body provided inside the lower case (300) to support a back surface of the upper case (210). The battery pack (200) may further comprise an elastic member (231, 232) disposed on a surface of the upper case (210) and sandwiched between the upper case (210) and a lower surface of the floor (102). In such a configuration, it is possible to suppress the upper case (210) of the battery pack (200) from vibrating.