Battery Container Module With Passive Condensation Drainage

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Solution Overview

Problem

Existing battery assemblies face issues with humidity accumulation, electrical safety, and structural complexity, necessitating a solution that addresses these challenges while allowing for expandability and improved energy density.

Innovation Solution

A battery assembly design featuring a case with a pipe and drain case configuration that facilitates moisture removal through gravitational condensation and drainage, utilizing a pipe with protruding pins and a drain case to capture and discharge moisture without additional power devices, combined with a simplified structure and improved electrical safety features.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a traditional battery assembly structure is used, then the structure is simple, but humidity accumulates inside causing electrical safety issues

Engineering Contradiction:
Improveelectrical safetyVSAvoidstructure complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The battery assembly is divided into functional modules: battery packs, pipe modules, and drain case modules. This segmentation allows the humidity removal function to be added as a separate module rather than redesigning the entire structure, thus improving electrical safety while controlling overall complexity.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The pipe module acts as an intermediary component between the battery packs and the drain case. It provides a dedicated pathway for humidity to travel from the battery compartment to the drainage system, enabling electrical safety improvement without requiring direct modification of the battery packs or case structure.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Reliability

If additional humidity removal devices are added, then humidity can be removed effectively, but the structure becomes more complex and size increases

Engineering Contradiction:
Improvehumidity removal capabilityVSAvoidassembly size
Core Design Contradiction:
ReliabilityVSVolume of moving object

Solution Approach 1:

The humidity removal function is merged with the existing structural components. The pipe module utilizes the natural gravitational flow path, and the drain case integrates with the bottom of the battery assembly, combining multiple functions (drainage, humidity collection, and structural support) into unified components rather than adding separate dedicated systems.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The system uses passive gravity-driven drainage rather than active pumping mechanisms. Condensed humidity naturally flows down the pipe module into the drain case and exits through the drainage hole without requiring additional power devices or complex control systems, thus removing humidity effectively while minimizing size and complexity additions.

Inventive Principle:
Principle #25Self-service

3Device complexity

If passive gravity-driven drainage is used, then the structure is simplified and no power devices are needed, but drainage efficiency may be reduced

Engineering Contradiction:
Improvepower device requirementVSAvoiddrainage efficiency
Core Design Contradiction:
Device complexityVSProductivity

Solution Approach 1:

The drainage system utilizes the vertical dimension by positioning the drain case at the bottom of the assembly and the pipe module extending downward from the battery packs. This vertical arrangement maximizes gravitational effect, allowing efficient passive drainage without requiring horizontal transport mechanisms or additional power devices.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The pipe module is strategically positioned to contact or be near the battery packs, creating a localized condensation zone where humidity is most prevalent. The drainage hole is positioned at the lowest point of the case to ensure complete drainage. This localized optimization ensures efficient humidity removal at critical points without requiring a complex system throughout the entire assembly.

Inventive Principle:
Principle #3Local quality

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 effectively removes humidity, enhances electrical safety, and simplifies the structure of the battery assembly, reducing its size and improving economic efficiency.

Implementation Method 1

a pipe positioned inside the case and having a flow path

Methodology Applied
Scientific EffectCondensation: Condensation

Implementation Method 2

a drain case positioned below the pipe and providing an inner space... a drainage hole in the bottom panel

Methodology Applied
Scientific EffectGravitation: Gravitation

Data Source

PatentEP4685081A1Container module
Publication Date: 2026.01.28 LG ENERGY SOLUTION LTD
  • EP4685081A1 patent drawingFigure 1
  • EP4685081A1 patent drawingFigure 2
  • EP4685081A1 patent drawingFigure 3

AI summary

Disclosed is a container module. The container module includes a case providing an inner space; a battery pack accommodated inside the case; a pipe positioned inside the case and having a flow path; and a drain case positioned below the pipe and providing an inner space.