Battery Pack Elastic Body Shock Absorption Design
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Solution Overview
Problem
Existing battery packs lack sufficient durability to withstand vibrations and external impacts, which can cause damage to the unit battery cells and disrupt their functionality.
Innovation Solution
A battery pack design featuring a core pack with unit battery cells electrically connected, an elastic body to provide shock absorption, and a case structure with terminal plates and wires for electrical connectivity, along with an elastic body that surrounds the battery cell and includes grooves to reduce friction and release holes for heat dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a battery pack uses a rigid case structure to protect battery cells, then structural strength is improved, but durability against vibrations and impacts deteriorates
Solution Approach 1:
The patent applies this principle by introducing an elastic body (rubber or foam material) that surrounds and cushions the battery cell. This flexible elastic body absorbs external impacts and vibrations, protecting the rigid battery cell structure while maintaining overall pack durability. The elastic body acts as a shock-absorbing interface between the rigid case and the battery cell.
Solution Approach 2:
The patent combines different materials with complementary properties: a rigid case structure for structural strength and an elastic body for shock absorption. This composite approach creates a hybrid system where the rigid case provides form and structural integrity while the elastic material provides vibration damping and impact protection, resolving the contradiction between strength and durability.
2Stability of the object's composition
If unit battery cells are tightly fixed in the case, then positional stability is improved, but resistance to external impacts deteriorates
Solution Approach 1:
The elastic body serves as a flexible mounting structure that holds the battery cell in position while allowing movement during impacts. Unlike rigid fixation that would transmit shock forces, the elastic body maintains positional stability through gentle constraint while absorbing impact energy, protecting the battery cell from damage during vibrations and drops.
3Reliability
If the elastic body tightly surrounds the battery cell, then protection is improved, but heat dissipation deteriorates
Solution Approach 1:
The patent specifies that the elastic body has a porous structure with voids or channels. This porosity allows heat to conduct through the elastic body more effectively while the material maintains its cushioning and protective functions. The porous structure creates thermal pathways that prevent heat buildup despite the elastic body surrounding the battery cell.
Solution Approach 2:
The elastic body is designed with non-uniform properties: it provides dense cushioning in areas requiring impact protection while incorporating porous regions or channels that facilitate heat dissipation. This local variation in material quality allows simultaneous optimization of protection and thermal management.
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 design enhances the battery pack's durability, protecting it from accidents and external impacts, ensuring continued functionality even under significant vibrations and drops, as demonstrated by reliability tests.
Implementation Method 1
an elastic body between the core pack and the case to elastically support an exterior of the core pack
Implementation Method 2
A plurality of grooves may be provided in the second surfaces to reduce friction with the lower case
Implementation Method 3
At least one release hole may be provided in the extension part to release heat generated from the battery cell
Data Source
AI summary
A battery pack includes: a core pack comprising a battery cell including a plurality of unit battery cells electrically connected to each other, a first electrode tab, and a second electrode tab; a case comprising a lower case accommodating the core pack therein and having an opening at a side thereof to insert the core pack therethrough, and an upper case closing the opening and including a first terminal and a second terminal electrically connected to the first electrode tab and the second electrode tab, respectively; and an elastic body between the core pack and the case to elastically support an exterior of the core pack.