Battery Pack Cable Protection Member for Vibration Resistance

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Solution Overview

Problem

Battery packs with flexible outer containers face issues with disconnection and cable wiring due to vibrations and impacts, particularly affecting the connection portions of collector foils and electrode terminals, and existing solutions do not adequately address cable wiring flexibility and protection.

Innovation Solution

A battery pack design that includes a cable protection member with a through portion allowing attachment in multiple directions and adjustable positioning within the battery case, enhancing cable wiring flexibility and protection against disconnection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If the battery uses a flexible sheet as the outer container, then the battery weight is reduced, but the connection portions of the collector foil and electrode terminal are vulnerable to disconnection and cutting under impacts

Engineering Contradiction:

Improvebattery weightVSAvoidconnection portion reliability

Core Design Contradiction:

Weight of moving objectVSReliability

Solution Approach 1:

A protective structure is provided around the connection portions of the collector foil and electrode terminal before impacts occur. This protective structure includes a protective member that surrounds the connection portions, preventing direct transmission of external impacts to these vulnerable connection points, thereby maintaining reliability while keeping the flexible outer container design

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Adaptability or versatility

If the cable is bent at large curvature and arranged, then cable wiring flexibility is improved, but the disconnection possibility increases under continuous impacts and vibrations

Engineering Contradiction:

Improvecable wiring flexibilityVSAvoidcable connection reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

A protective structure is provided around the cable connection portions before impacts occur. This protective structure includes a protective member that surrounds the connection portions, preventing direct transmission of external impacts to these vulnerable connection points, thereby maintaining reliability while keeping the flexible outer container design

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The protective structure incorporates flexible protective members that can deform with cable movements while maintaining protection. The flexible nature allows the protective structure to accommodate cable bending and wiring adjustments without compromising the protection against disconnection under impacts and vibrations

Inventive Principle:

Principle #30Flexible shells and thin films

3Reliability

If the cable is arranged inside the battery case at small curvature or without bending, then the disconnection risk is reduced, but the space requirement and wiring complexity increase

Engineering Contradiction:

Improvecable connection reliabilityVSAvoidcable arrangement complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #30Flexible shells and thin films

Data Source

PatentUS11616354B2Battery pack

Publication Date: 2023.03.28 ENVISION AESC JAPAN LTD

AI summary

A battery pack houses a battery inside a battery case, the battery case (100) includes an opening (450), cables (200, 300) electrically connected with the battery is inserted to the opening, a cable protection member (400) including a through portion (410) is arranged at the opening, the cable protection member is attachable to the opening in at least two different directions, and a position of the through portion to the battery case changes according to an attaching direction.