Battery Cell Pressure Jig for Faster No-Vent Measurement

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Solution Overview

Problem

Conventional internal pressure measurement of battery cells is time-consuming, manpower-intensive, and costly, lacking a fundamental no-vent solution during the manufacturing process.

Innovation Solution

A battery cell internal pressure measurement apparatus comprising a jig housing and jig cover with cell grooves, sealing members, pressure and temperature measurement units, and a valve unit for precise gas control, enabling efficient internal pressure and temperature monitoring.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If conventional internal pressure measurement test is performed by storing battery cell in specific container for predetermined time and temperature, then measurement accuracy is ensured, but measurement time and cost increase significantly

Engineering Contradiction:

Improveinternal pressure measurement accuracyVSAvoidmeasurement time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The battery cell is pierced with a needle before storage to pre-establish a communication channel between the internal and external environments. This preliminary action allows pressure equalization to occur naturally during storage, eliminating the need for prolonged sealed container storage and enabling faster measurement while maintaining accuracy.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The measurement system extracts only the necessary function (pressure measurement) from the complex conventional process. By using a simple needle piercing method combined with pressure sensor measurement, the patent removes unnecessary steps such as prolonged sealed storage, manual pressure testing, and complex container requirements, thereby reducing measurement time while maintaining precision.

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of operation

If conventional internal pressure measurement test is performed manually, then measurement can be carried out, but manpower and operational complexity increase

Engineering Contradiction:

Improvemeasurement operation simplicityVSAvoidmeasurement system complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The battery cell itself performs part of the measurement process by naturally equalizing pressure through the pierced needle during storage. The system leverages the battery's own internal pressure to drive the measurement, eliminating the need for complex external pressurization equipment or manual intervention, thereby simplifying operation while reducing overall system complexity.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces complex mechanical pressure testing equipment with a simple needle piercing mechanism combined with electronic pressure sensing. This substitution transforms a mechanically intensive manual process into an automated electronic measurement system, improving ease of operation while actually reducing device complexity through the use of simple, reliable components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If conventional measurement test is performed in sealed container, then pressure containment is maintained, but measurement efficiency and responsiveness decrease

Engineering Contradiction:

Improvepressure containment reliabilityVSAvoidmeasurement efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The system transitions from a static sealed container approach to a dynamic open-system approach. The needle piercing creates a controlled dynamic interface between the battery interior and exterior, allowing pressure to equalize naturally during storage. This dynamic approach maintains reliability by ensuring accurate pressure representation while dramatically improving measurement efficiency through automated, real-time sensing capability.

Inventive Principle:

Principle #15Dynamics

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

Enhances the efficiency of internal pressure measurement by allowing continuous monitoring and data collection, even in the event of a vent, reducing time and cost associated with conventional methods.

Implementation Method 1

at least one pressure measurement unit provided to the jig cover and configured to measure a gas pressure inside the jig housing

Methodology Applied

Scientific EffectPressure sensing:

Implementation Method 2

at least one temperature measurement unit provided to the jig cover and configured to measure a temperature change inside the jig housing

Methodology Applied

Scientific EffectTemperature sensing:

Implementation Method 3

at least one sealing member provided between the jig housing and the jig cover

Methodology Applied

Scientific EffectSealing:

Data Source

PatentUS12535375B2Battery cell internal pressure measurement apparatus

Publication Date: 2026.01.27 LG ENERGY SOLUTION LTD

AI summary

A battery cell internal pressure measurement apparatus for measuring an internal pressure of at least one battery cell according to an example embodiment of the present disclosure may include a jig housing configured to accommodate the at least one battery cell, and a jig cover coupled to the jig housing and configured to cover the at least one battery cell. The at least one cell groove into which the at least one battery cell is inserted may be formed at a bottom of the jig housing.