Battery Safety Test Jig With Removable Pins and Flame Discharge

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Solution Overview

Problem

The challenge of evaluating the safety of large-scale secondary batteries is exacerbated by the disconnection of welded terminals due to high electric current, particularly in cylindrical batteries, which affects the stability and safety assessment.

Innovation Solution

A jig is designed with terminal pins and a plate to securely connect with the battery's external terminals, featuring an ignition discharge port to manage heat and flame, allowing for safe evaluation without welding, and includes a plate controller for adjusting contact and separation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If welded terminals are used to connect battery to evaluation apparatus, then electrical connection is established, but terminal disconnection occurs due to heat from high electric current

Engineering Contradiction:

Improveterminal connection reliabilityVSAvoidheat-induced terminal disconnection

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The invention divides the terminal connection system into separate components: the battery terminal, the evaluation apparatus terminal, and a removable connector. This segmentation allows the connection to be made without welding, avoiding the heat generation that causes terminal disconnection while maintaining reliable electrical contact during evaluation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention introduces a connector as an intermediary component between the battery terminal and the evaluation apparatus terminal. This connector facilitates electrical connection without requiring welding, thereby eliminating the harmful heat effect that causes terminal disconnection in conventional welded connections.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If safety evaluation of large-scale secondary batteries is performed, then safety data is obtained, but terminal disconnection prevents accurate evaluation

Engineering Contradiction:

Improvesafety evaluation accuracyVSAvoidterminal connection stability

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The invention segments the evaluation system into modular components with standardized connectors, ensuring stable terminal connections throughout the safety evaluation process. This segmentation prevents terminal disconnection that would otherwise compromise evaluation accuracy and data reliability.

Inventive Principle:

Principle #1Segmentation

3Strength

If conventional welding method is used for terminal connection, then strong electrical connection is achieved, but heat generation causes terminal disconnection during high current operation

Engineering Contradiction:

Improveelectrical connection strengthVSAvoidterminal temperature

Core Design Contradiction:

StrengthVSTemperature

Solution Approach 1:

The invention replaces the thermal welding process with a mechanical connection system using connectors. This substitution eliminates the heat generation inherent in welding while maintaining strong electrical connection strength through optimized mechanical contact interfaces designed for high current operation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS12553949B2Jig for evaluating safety of secondary battery

Publication Date: 2026.02.17 LG ENERGY SOLUTION LTD

AI summary

A jig for evaluating stability of a battery cell includes a jig part including first and second terminal pins configured to come into contact with external terminals of the battery cell, and a plate positioned to face the jig part and configured to support the battery cell, in which the jig part includes the first and second terminal pins configured to come into contact with the battery cell, and a main body configured to be separated from or coupled to at least any one of the first and second terminal pins.