All-Solid Battery Cut-Surface Testing With Elastic Protection

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Solution Overview

Problem

Existing test systems for all-solid rechargeable batteries face challenges in accurately and reliably testing battery specimens while minimizing damage to the cut surface, due to issues with surface distortion and exposure to air or physical damage.

Innovation Solution

A test system and method that includes a cut surface forming apparatus and a cut surface test apparatus. The cut surface forming apparatus uses elastic members and a pressing portion to uniformly adhere stack cells in the battery specimen, allowing for a uniform cut surface to be formed with minimal damage. The cut surface test apparatus then uses optical testing and protective measures to ensure accurate and reliable testing of the cut surface.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Difficulty of detecting and measuring

If the battery specimen is cut to expose the internal structure, then the internal structure becomes accessible for testing, but the cut surface becomes damaged and distorted

Engineering Contradiction:

Improveaccessibility of internal structureVSAvoidcut surface quality

Core Design Contradiction:

Difficulty of detecting and measuringVSManufacturing precision

Solution Approach 1:

Elastic members are attached to the battery specimen before the cutting process. These elastic members protrude beyond the cut surface and provide preliminary support and protection during the cutting operation, preventing damage to the cut surface while allowing the internal structure to be exposed for testing.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The elastic members act as an intermediary between the cutting tool and the battery specimen. By positioning the elastic members to protrude beyond the cut surface, they serve as a protective mediator that absorbs cutting stresses and prevents direct damage to the delicate cut surface of the battery specimen.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If the cut surface is exposed for optical testing, then testing can be performed, but the cut surface is vulnerable to air exposure and physical damage

Engineering Contradiction:

Improveoptical testing accuracyVSAvoidair exposure and physical damage

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The elastic members serve as a protective intermediary that shields the cut surface from harmful environmental factors. By protruding beyond the cut surface, they create a protective barrier that prevents direct exposure to air and physical damage while allowing optical testing to proceed through or around them.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The elastic members provide beforehand cushioning protection to the cut surface. Their elastic properties allow them to absorb and dissipate mechanical stresses before they can reach the cut surface, while their protruding position establishes a protective buffer zone against air exposure and physical contaminants before testing begins.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 proposed solution effectively minimizes damage to the cut surface of battery specimens, prevents distortion, and allows for accurate optical testing, thereby enhancing the reliability and accuracy of battery testing.

Implementation Method 1

a first elastic member loading portion configured to position elastic members on opposite surfaces of the battery specimen

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

a pressing portion that presses the opposite surfaces of the battery specimen

Methodology Applied

Scientific EffectCompression: Compression

Implementation Method 3

an optical test portion configured to optically test the cut surface

Methodology Applied

Scientific EffectOptical testing:

Data Source

PatentUS20250201947A1Test system and method for all-solid rechargeable battery

Publication Date: 2025.06.19 SAMSUNG SDI CO LTD

AI summary

An embodiment provides a test system for an all-solid rechargeable battery, including: a cut surface forming apparatus that forms a cut surface on a battery specimen including a positive electrode, a negative electrode, and a solid electrolyte layer, and a cut surface test apparatus that tests the cut surface of the battery specimen, wherein the cut surface test apparatus includes a first elastic member loading portion that positions first elastic members on both surfaces of the battery specimen, a first pressing portion that presses both surfaces of the battery specimen, and an optical test portion that optically tests the cut surface, and the first elastic member loading portion aligns the first elastic member so that a side surface of the first elastic member protrudes more than the cut surface of the battery specimen.