Flexible Rib Battery Pack Module Fixation

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Solution Overview

Problem

Conventional battery packs fail to securely support and fix battery modules within the pack housing, leading to potential damage from collisions with internal ribs when subjected to external forces.

Innovation Solution

Incorporating a flexible rib with elasticity into the pack housing, which is formed on at least one wall surface and can be paired with opposite slopes, coupled to a groove, and featuring a blade portion for enhanced contact with the battery module, ensuring complete support and fixation without gaps.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If a rigid rib is formed at the pack housing to support the battery module, then the battery module can be supported, but a gap must be maintained between the battery module and rib to prevent collision damage

Engineering Contradiction:
Improvesupport stabilityVSAvoidcollision prevention
Core Design Contradiction:
Stability of the object's compositionVSReliability

Solution Approach 1:

The rib is designed with flexible material properties allowing it to dynamically adapt its shape. When the battery module is installed, the rib elastically deforms to conform to the module's surface, eliminating gaps while preventing collision through controlled flexibility rather than rigid contact

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The rib's physical parameters (flexibility, elasticity) are changed from rigid to flexible state. This parameter change allows the rib to maintain continuous contact with the battery module for support while the elastic properties prevent harmful collisions by absorbing impact energy

Inventive Principle:
Principle #35Parameter changes

2Reliability

If a gap is maintained between the battery module and rib, then collision damage is prevented, but the battery module cannot be completely fixed and may move under external force

Engineering Contradiction:
Improvecollision preventionVSAvoidfixation stability
Core Design Contradiction:
ReliabilityVSStability of the object's composition

Solution Approach 1:

The rib is constructed as a flexible element that can deform elastically. This flexibility allows it to wrap around and secure the battery module completely fixed position while maintaining gentle contact that prevents collision damage through cushioning

Inventive Principle:
Principle #30Flexible shells and thin films

3Strength

If the rib is made rigid for strong support, then support strength is improved, but the rib cannot adapt to battery module position variations and may cause collision

Engineering Contradiction:
Improvesupport strengthVSAvoidposition adaptation
Core Design Contradiction:
StrengthVSAdaptability or versatility

Solution Approach 1:

The rib's material parameters are selected to provide optimal balance between strength and flexibility. The elastic modulus and geometric dimensions are designed so the rib maintains sufficient support strength while exhibiting enough flexibility to adapt to position variations of the battery module

Inventive Principle:
Principle #35Parameter changes

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 flexible rib effectively prevents the battery module from moving and colliding within the pack housing, thereby preventing damage and ensuring secure mounting even under external forces.

Implementation Method 1

a flexible rib formed at an inner side of the pack housing and having elasticity, the flexible rib pressing the battery module in contact with the battery module

Methodology Applied
Scientific EffectElasticity: Elasticity

Data Source

PatentUS11094987B2Battery pack to support and fix battery module
Publication Date: 2021.08.17 LG ENERGY SOLUTION LTD
  • US11094987B2 patent drawing
  • US11094987B2 patent drawing
  • US11094987B2 patent drawing

AI summary

Disclosed is a battery pack, which includes a battery module having a plurality of battery cells; a pack housing configured to accommodate the battery module; and a flexible rib formed at an inner side of the pack housing and having elasticity, the flexible rib pressing the battery module in contact with the battery module.