Pouch Battery Cell Clamping Structure That Protects Case Edges

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Solution Overview

Problem

Existing battery cell fixing apparatuses cause deformation and exterior defects in pouch-type battery cases due to applied pressure, which cannot be restored, and are costly and complex in design.

Innovation Solution

A battery cell fixing apparatus with first and second frames that apply pressure to the battery case without pressing on the edges, using anti-pressure grooves to stabilize the cell and prevent deformation, ensuring a simple and cost-effective configuration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If pressure is applied to fix the battery cell, then the battery cell is stably fixed, but the battery case is deformed into an incorrect shape and exterior defects occur

Engineering Contradiction:

Improvestability of battery cellVSAvoidshape of battery case

Core Design Contradiction:

Stability of the object's compositionVSShape

Solution Approach 1:

The pressing surface is divided into multiple pressing portions that contact different regions of the battery case. By segmenting the pressing force into multiple contact points rather than a single concentrated point, the pressure is distributed more evenly, stabilizing the battery cell while preventing localized deformation of the battery case.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the battery case are pressed with different pressures or not pressed at all. The pressing portions are strategically positioned to contact only specific areas that need stabilization, while avoiding regions that would deform under pressure. This localized pressing approach maintains battery cell stability without causing exterior defects.

Inventive Principle:

Principle #3Local quality

2Strength

If the battery case thickness is increased, then the structural strength is improved, but exterior defects occur more easily under pressure

Engineering Contradiction:

Improvestrength of battery caseVSAvoidexterior defects under pressure

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The pressing force is segmented into multiple portions that contact different areas of the battery case. This segmentation prevents concentration of force on any single point, reducing the risk of exterior defects even in thicker battery cases that are more susceptible to pressure-induced deformation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The pressing portions act as intermediaries between the fixing apparatus and the battery case. These intermediaries distribute the mechanical stress and prevent direct concentrated pressure on the battery case surface, thereby preventing exterior defects while still providing adequate fixing force.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If the electrode assembly accommodating space width is larger than the electrode assembly width, then the battery cell design is more flexible, but exterior defects occur due to pressure application

Engineering Contradiction:

Improveflexibility of battery cell designVSAvoidexterior defects

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The pressing portions are positioned to contact only specific local regions of the battery case that require stabilization, while leaving other regions untouched. This localized approach allows the battery case to maintain its flexible design with larger accommodating space without suffering from pressure-induced exterior defects in the untouched regions.

Inventive Principle:

Principle #3Local quality

4Stability of the object's composition

If a complex fixing apparatus is used, then the battery cell fixing is more stable, but the manufacturing cost increases

Engineering Contradiction:

Improvestability of battery cellVSAvoidmanufacturing cost

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The fixing apparatus is designed with multiple pressing portions that can stabilize the battery cell in various positions and orientations. This multi-functional design provides comprehensive stabilization without requiring multiple separate fixing devices, thereby maintaining stability while reducing overall manufacturing cost through consolidation of functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The pressing portions are designed to automatically contact and stabilize the battery case at appropriate locations without requiring complex control systems or additional actuators. The structure itself provides the fixing function through its geometric configuration, eliminating the need for expensive complex control mechanisms while maintaining stabilization effectiveness.

Inventive Principle:

Principle #25Self-service

Data Source

PatentUS20260011769A1Battery Cell Fixing Apparatus

Publication Date: 2026.01.08 LG ENERGY SOLUTION LTD

AI summary

A battery cell fixing apparatus, for fixing a battery cell, having a first frame for being in contact with one side surface in a first direction of a battery case to press toward in one direction of the first direction and fix the battery cell, and having an anti-pressure groove for not pressing toward the one direction of the first direction and not fixing the one side end or the other side end in a second direction by not being in contact with one side end or other side end in the first direction of the battery case.