Cylindrical Cell Holder Interlock for Vibration-Resistant Fixation

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Solution Overview

Problem

Existing power storage modules face challenges in securely fixing power storage devices in holders, particularly in environments with prolonged vibration, which affects reliability.

Innovation Solution

The power storage module incorporates convex and concave parts on the surfaces of the power storage devices and holders, forming an anchor effect to enhance fixation, and uses adhesives and potting materials to secure the devices within the holders.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional fixing methods are used without convex-concave structures, then the device complexity is low, but the reliability of fixing deteriorates under prolonged vibration

Engineering Contradiction:

Improvefixation reliabilityVSAvoidholder structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention applies curvature by forming convex portions on the power storage device surface and corresponding concave portions in the holder, creating a curved interlocking interface that prevents relative movement under vibration while maintaining structural simplicity

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The convex portion of one component nests into the concave portion of the other component, creating an interlocking fit that enhances fixation reliability without requiring additional fastening mechanisms or complex structures

Inventive Principle:

Principle #7Nested doll (Nesting)

2Reliability

If convex and concave parts are added to enhance fixation, then the reliability of fixing improves, but the manufacturing precision requirements increase

Engineering Contradiction:

Improvefixation reliabilityVSAvoidconvex-concave fit precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The convex and concave structures are implemented as localized features on specific surfaces of the power storage device and holder, concentrating the precision requirements to small, manageable areas rather than requiring high precision across entire component surfaces

Inventive Principle:

Principle #3Local quality

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

This configuration provides robust fixation, enhances alignment and stability against vibration, and facilitates efficient discharge of high-temperature gases during abnormal conditions.

Implementation Method 1

at least one convex part fitted in the concave part is formed on the other

Methodology Applied

Scientific EffectAnchor effect: Mechanical Fastener

Data Source

PatentUS12362422B2Power storage module

Publication Date: 2025.07.15 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A power storage module includes at least one cylindrical power storage device, and a lower holder that holds a lower end part of the power storage device, wherein at least one concave part is formed on one of a surface of the power storage device facing a holding part and a surface of the holding part facing the power storage device, and at least one convex part fitted in the concave part is formed on the other.