Battery Cell Sealing Edge Taping for Heat Dissipation

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Solution Overview

Problem

Existing battery cells face issues with heat susceptibility around the sealing edge due to welding, which can affect sealing integrity and hinder heat dissipation, while existing tape solutions for fixing the bending shape of the sealing edge compromise heat dissipation.

Innovation Solution

A battery cell design incorporating a heat-resistant body that covers at least a part of the sealing edge to fix its bending shape, with partial fixation to maintain heat dissipation, and a battery module design with partially displaced fixing bodies to secure both bending shape and heat dissipation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If a tape is provided over the entirety of the sealing edge to fix the bending shape, then the bending shape is maintained, but heat dissipation is compromised

Engineering Contradiction:

Improvebending shape maintenanceVSAvoidheat dissipation

Core Design Contradiction:

Stability of the object's compositionVSLoss of energy

Solution Approach 1:

The sealing edge is divided into multiple sections, with tapes provided only at specific intervals rather than covering the entire length. This segmentation allows the sealing edge to maintain its bending shape at critical points while leaving gaps for heat dissipation, resolving the contradiction between shape stability and thermal management

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Tapes are selectively applied only to specific portions of the sealing edge where bending shape maintenance is most critical, rather than uniformly across the entire sealing edge. This local application strategy maintains shape where needed while preserving heat dissipation capabilities in other areas

Inventive Principle:

Principle #3Local quality

2Reliability

If the sealing edge is exposed to heat from welding, then the sealing integrity may be compromised, but adding protective coverage may affect heat dissipation

Engineering Contradiction:

Improvesealing integrityVSAvoidheat dissipation

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

Instead of providing complete coverage of the sealing edge with protective tapes, the invention applies tapes partially at strategically selected intervals. This partial action provides sufficient protection against heat-induced sealing failures while maintaining adequate heat dissipation pathways through the uncovered portions

Inventive Principle:

Principle #16Partial or excessive action

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 sealing edge's resistance to heat, maintains its bending shape, and improves heat dissipation, thereby ensuring the integrity and performance of the battery cell.

Implementation Method 1

the heat resistant body has insulation, and the heat resistant body covers at least a part of at least one of opposite ends of the sealing edge

Methodology Applied

Scientific EffectThermal insulation: Thermal Insulation

Data Source

PatentUS20260018707A1Battery cell and battery module

Publication Date: 2026.01.15 AESC JAPAN LTD

AI summary

A battery cell (10) includes a battery element (100), an exterior member (120) that accommodates the battery element (100), and a first protective tape (136a) that covers at least a part of a right sealing edge (126b) of the exterior member (120).