Battery Cell Adapter Insulation Gap Against Heat Conduction

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Solution Overview

Problem

Heat generated during current flow through the adapter in a battery cell can cause insulation failure of the insulating member due to heat conduction, leading to potential short circuits.

Innovation Solution

Spacing at least a portion of the insulating member apart from the adapter to reduce heat conduction, ensuring good insulation performance by maintaining a gap between the adapter and the insulating member.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the insulating member is disposed close to the adapter to improve insulation coverage, then the insulation performance is improved, but heat conduction from the adapter to the insulating member increases causing insulation failure

Engineering Contradiction:

Improveinsulation performanceVSAvoidheat conduction

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent introduces an air gap as an intermediary thermal insulation layer between the adapter and the insulating member. This air gap acts as a thermal barrier that reduces heat conduction from the adapter to the insulating member, preventing the insulating member from melting while maintaining its insulation function.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent creates a spatial separation in the radial dimension between the adapter and the insulating member by introducing an air gap. This dimensional change allows the insulating member to maintain its insulation coverage function while being thermally isolated from the heat source.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Reliability

If current flows through the adapter to establish electrical conduction, then electrical connectivity is achieved, but heat is generated during current flow and welding

Engineering Contradiction:

Improveelectrical conductionVSAvoidheat generation

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The air gap serves as a thermal mediator that decouples the thermal field from the electrical field. It allows electrical conduction to proceed through the adapter while blocking thermal conduction to the insulating member, effectively separating the electrical function from the thermal impact.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent converts the harmful heat conduction into a beneficial thermal barrier function. By allowing an air gap to exist, the natural thermal insulation property of air is utilized to protect the insulating member from the heat generated during normal electrical operation and welding processes.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Stability of the object's composition

If the insulating member contacts the adapter to provide insulation support, then structural stability is improved, but heat conduction causes the insulating member to melt

Engineering Contradiction:

Improvestructural stabilityVSAvoidinsulation performance

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The air gap acts as a thermal mediator that preserves the structural stability arrangement while preventing thermal conduction. The insulating member maintains its positional stability and support function relative to the adapter, but the air gap blocks the heat transfer path that would otherwise cause melting and insulation failure.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 arrangement mitigates insulation failure, enhances the reliability of the battery cell by maintaining effective insulation and reducing the risk of short circuits.

Implementation Method 1

heat is conducted to the insulating member, posing a risk that the insulating member being melted causes failure of insulation performance

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentEP4664666A1Battery cell, battery, and electric device

Publication Date: 2025.12.17 CONTEMPORARY AMPEREX TECHNOLOGY CO LTD

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AI summary

This application pertains to the technical fields of batteries (100), and provides a battery cell (10), a battery (100), and an electric device. The electric device includes a battery (100), the battery (100) includes a battery cell (10), and the battery cell (10) includes a casing (12), an electrode assembly (11), an electrode terminal (13), an adapter (14), and an insulating member (15). The electrode assembly (11) is disposed within the casing (12). The adapter (14) is disposed within the casing (12) and conductively connected to the electrode assembly (11) and the electrode terminal (13). The insulating member (15) is disposed within the casing (12) and at least partially located between the adapter (14) and the casing (12), and at least a portion of the insulating member (15) is spaced apart from the adapter (14). Spacing at least the portion of the insulating member (15) apart from the adapter (14) can mitigate the problem that heat from the adapter (14) being conducted to the insulating member (15) causes failure of insulation performance of the insulating member (15).