Secondary Battery Insulation Member Space Management

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Solution Overview

Problem

Secondary batteries face challenges with swelling and puncture characteristics due to limited internal space efficiency and stability issues, particularly when multiple electrode assemblies are packed closely together.

Innovation Solution

Incorporating an insulation member, such as a silicon tape or plastic plate, between electrode assemblies to create a defined space, which reduces swelling and improves puncture resistance by maintaining stability and preventing foreign matter infiltration while allowing for efficient electrolyte distribution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If multiple electrode assemblies are packed closely together to increase capacity, then battery capacity increases, but internal space efficiency decreases and swelling occurs

Engineering Contradiction:

Improvebattery capacityVSAvoidinternal space efficiency

Core Design Contradiction:

Quantity of substanceVSVolume of moving object

Solution Approach 1:

The insulation member introduces a new dimensional element (thickness dimension) between electrode assemblies, creating a three-dimensional space management system that accommodates multiple assemblies while preventing swelling through the defined thickness parameter

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The insulation member acts as an intermediary component between adjacent electrode assemblies, providing necessary separation and space definition without interfering with the electrical function of the battery components

Inventive Principle:

Principle #24Intermediary (Mediator)

2Volume of moving object

If electrode assemblies are positioned close together to maximize space utilization, then internal space efficiency improves, but puncture resistance decreases

Engineering Contradiction:

Improveinternal space efficiencyVSAvoidpuncture resistance

Core Design Contradiction:

Volume of moving objectVSReliability

Solution Approach 1:

The insulation member provides pre-established protective spacing between electrode assemblies, cushioning against potential puncture forces before they can reach critical components, thereby improving puncture resistance while maintaining compact design

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Reliability

If insulation member thickness is increased to improve puncture resistance, then puncture characteristic improves, but internal space efficiency decreases

Engineering Contradiction:

Improvepuncture characteristicVSAvoidinternal space efficiency

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The patent optimizes the thickness parameter of the insulation member to achieve the minimum effective value that provides adequate puncture protection while maximizing space utilization, balancing reliability and efficiency through precise parameter control

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9012059B2Secondary battery

Publication Date: 2015.04.21 SAMSUNG SDI CO LTD

AI summary

A secondary battery includes at least two electrode assemblies, each electrode assembly including a first electrode plate, a separator, and a second electrode plate, a case accommodating the at least two electrode assemblies, electrode terminals electrically connected to the at least two electrode assemblies, a cap plate sealing the case and exposing the electrode terminals to the outside, and at least one insulation member between the at least two electrode assemblies, the insulation member defining a space between the at least two electrode assemblies.