Asymmetric Pouch Cell Leads for Reinforced Battery Module Packing

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Solution Overview

Problem

Conventional pouch-type battery modules face limitations in spatial efficiency and mechanical strength due to protruding electrode leads and the need for additional reinforcing structures, which reduces space utilization.

Innovation Solution

The battery cells are designed with asymmetrically positioned electrode leads, creating dead spaces that allow for a reinforcing pole to penetrate without requiring additional space, enhancing mechanical strength while maintaining high spatial efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If a reinforcing bar is added to improve mechanical strength, then mechanical strength is improved, but space utilization rate decreases

Engineering Contradiction:

Improvemechanical strengthVSAvoidspace utilization rate

Core Design Contradiction:

StrengthVSVolume of moving object

Solution Approach 1:

The patent merges the reinforcing bar function with the electrode lead structure. The electrode lead is designed to extend into the interior space of the battery module and function as both an electrical conductor and a mechanical reinforcement element, eliminating the need for separate reinforcing structures and improving space utilization.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The electrode lead is given dual functionality: it serves both as an electrical conductor for current flow and as a mechanical reinforcement structure. This multi-functional design allows the same component to address both electrical and structural requirements, reducing the number of separate components needed.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Reliability

If electrode leads protrude from both sides, then electrical connection is achieved, but spatial efficiency decreases

Engineering Contradiction:

Improveelectrical connectionVSAvoidspatial efficiency

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent employs asymmetric positioning of electrode leads where one lead protrudes from the first side surface and the other lead protrudes from the second side surface at a different position. This asymmetric arrangement optimizes the use of available space while maintaining proper electrical connections, reducing wasted space compared to symmetric arrangements.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The electrode leads are positioned at different heights relative to the top and bottom surfaces of the battery cell. This vertical dimension variation allows the leads to be arranged more compactly in three-dimensional space, improving spatial efficiency while maintaining electrical functionality.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Data Source

PatentEP4002558B1Battery cell having asymmetric electrode leads, and battery module comprising same and having reinforced mechanical strength

Publication Date: 2025.11.05 LG ENERGY SOLUTION LTD

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AI summary

A battery cell has asymmetrically formed electrode leads, and a battery module including the same. The spatial efficiency and the mechanical strength of the battery module are improved.