Battery Cell Thermal Interface With Interlocking Cooling Attachment

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Solution Overview

Problem

Existing battery technologies face safety issues due to the separation of thermal management components from battery cells caused by expansion or mechanical vibration, leading to ineffective temperature adjustment and potential safety risks.

Innovation Solution

A battery design featuring a concave-convex surface on the battery cell for increased contact area with a thermal management component, secured using an adhesive layer with embedded protrusions in grooves, which enhances the connection strength and stability against debonding phenomena.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If a flat surface is used for the battery cell, then the manufacturing process is simple, but the contact area between the thermal management component and the battery cell is small, leading to potential separation under expansion or vibration

Engineering Contradiction:

Improvecontact areaVSAvoidsurface structure

Core Design Contradiction:

Area of stationary objectVSDevice complexity

Solution Approach 1:

The battery cell surface is designed with a concave-convex pattern instead of a flat surface. The convex portions protrude from the surface while concave portions form recesses, creating a three-dimensional undulating structure that increases the contact area with the thermal management component and prevents separation under expansion or vibration forces

Inventive Principle:

Principle #14Spheroidality (Curvature)

2Strength

If a simple adhesive layer is used to connect the thermal management component, then the assembly process is fast, but the connection strength is insufficient to resist debonding under expansion or mechanical vibration

Engineering Contradiction:

Improveconnection strengthVSAvoidconnector structure

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The connector is designed with a concave-convex surface structure featuring convex portions that protrude and concave portions that recess. This three-dimensional structure increases the bonding area with the adhesive layer and creates mechanical interlocking, significantly enhancing connection strength and resistance to debonding under expansion or vibration forces

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The convex portions of the connector fit into the concave portions of the battery cell surface, creating a nested interlocking structure. This mechanical interlocking works in conjunction with the adhesive layer to provide enhanced connection strength and prevent separation under thermal expansion or mechanical vibration

Inventive Principle:

Principle #7Nested doll (Nesting)

3Reliability

If the thermal management component is loosely connected to the battery cell, then assembly is easy, but the thermal management effectiveness is reduced due to separation under expansion or vibration

Engineering Contradiction:

Improvethermal management stabilityVSAvoidassembly ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The concave-convex surface structure creates a mechanically interlocked connection between the thermal management component and battery cell. The convex portions fitting into concave portions provide inherent alignment and stable contact, ensuring reliable thermal management while maintaining assembly simplicity through the self-aligning nature of the interlocking structure

Inventive Principle:

Principle #14Spheroidality (Curvature)

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

The solution ensures stable connection of the thermal management component to the battery cell, effectively adjusting temperature and enhancing safety by increasing the bonding area and connection strength, thereby preventing separation due to expansion or vibration.

Implementation Method 1

the connector is an adhesive layer... the thermal management component is bonded to the first surface of the battery cell through the adhesive layer

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 2

the protrusions are embedded in the grooves... effectively improve the connection strength between the adhesive layer and the battery cell

Methodology Applied

Scientific EffectMechanical interlocking: Mechanical Fastener

Implementation Method 3

a thermal management component configured for accommodating fluid to adjust the temperature of the at least one battery cell

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 4

accommodating fluid to adjust the temperature

Methodology Applied

Scientific EffectConvection: Convection

Data Source

PatentUS20240014462A1Battery and electric device

Publication Date: 2024.01.11 CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED

AI summary

The present application discloses a battery and an electric device. The battery includes: at least one battery cell; a thermal management component configured for accommodating a fluid to adjust the temperature of the battery cell; a connector provided between the first surface of the battery cell and the thermal management component and used for making the thermal management component attached onto the first surface, wherein the first surface is a concave-convex surface. The technical solution provided by the present application can improve the safety of the battery.