Battery Module Partition Wall Structure for Anti-Sag Assembly

Solution Overview

Problem

Conventional battery modules face challenges in precise assembly and sagging issues as the number of stacked battery cells increases, affecting their structural integrity and assembling properties.

Innovation Solution

Incorporating a partition wall structure between battery cells with an insulating member attached to its surface, and a thermally conductive resin layer between the cell stack and the frame, to enhance rigidity and prevent sagging, while improving assembly precision.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If the number of stacked battery cells increases to improve capacity and output, then the battery module's energy storage capability is improved, but the assembly precision deteriorates and sagging phenomenon occurs

Engineering Contradiction:

Improvenumber of battery cellsVSAvoidassembly precision

Core Design Contradiction:

Quantity of substanceVSManufacturing precision

Solution Approach 1:

The battery module is divided into multiple battery cell stacks, with each stack containing a specific number of battery cells (e.g., 2-5 cells per stack). Partition walls are introduced to separate these stacks, creating modular units that are easier to assemble with precision while collectively achieving high capacity through increased quantity of cells.

Inventive Principle:

Principle #1Segmentation

2Quantity of substance

If the number of stacked battery cells increases to improve capacity and output, then the battery module's energy storage capability is improved, but the structural stability deteriorates due to sagging phenomenon

Engineering Contradiction:

Improvenumber of battery cellsVSAvoidstructural stability

Core Design Contradiction:

Quantity of substanceVSStability of the object's composition

Solution Approach 1:

The battery module is divided into multiple battery cell stacks, with each stack containing a specific number of battery cells (e.g., 2-5 cells per stack). Partition walls are introduced to separate these stacks, creating modular units that are easier to assemble with precision while collectively achieving high capacity through increased quantity of cells.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Partition walls are introduced as intermediary structures between battery cell stacks. These partition walls provide mechanical support and separation, preventing the sagging phenomenon that occurs when too many cells are stacked without adequate structural division, thereby maintaining structural stability while allowing increased cell quantity.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Quantity of substance

If the number of stacked battery cells increases to improve capacity and output, then the battery module's energy storage capability is improved, but the assembling difficulty increases

Engineering Contradiction:

Improvenumber of battery cellsVSAvoidassembling difficulty

Core Design Contradiction:

Quantity of substanceVSEase of manufacture

Solution Approach 1:

The battery module is divided into multiple battery cell stacks, with each stack containing a specific number of battery cells (e.g., 2-5 cells per stack). Partition walls are introduced to separate these stacks, creating modular units that are easier to assemble with precision while collectively achieving high capacity through increased quantity of cells.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Partition walls are introduced as intermediary structures between battery cell stacks. These partition walls provide mechanical support and separation, preventing the sagging phenomenon that occurs when too many cells are stacked without adequate structural division, thereby maintaining structural stability while allowing increased cell quantity.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 partition wall structure prevents sagging and improves assembling properties by maintaining structural integrity and ensuring insulation and thermal conductivity, allowing for a larger number of cells to be stacked without compromising the module's stability.

Implementation Method 1

a thermally conductive resin layer formed between the battery cell stack and the lower frame

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

an insulating member is attached to at least one surface of the partition wall

Methodology Applied

Scientific EffectElectrical insulation: Electrical Resistance

Data Source

PatentEP3958379B1Battery module and battery pack including the same

Publication Date: 2024.05.22 LG ENERGY SOLUTION LTD

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AI summary

A battery module according to the embodiment of the present disclosure includes a battery cell stack in which a plurality of battery cells are stacked; a lower frame for housing the battery cell stack; and an upper plate for covering the upper side of the lower frame, wherein at least one partition wall is formed between the plurality of battery cells of the battery cell stack, and an insulating member is attached to at least one surface of the partition wall.