Battery Module Heat Dissipating Plate Design

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Solution Overview

Problem

In storage battery modules, temperature variance among battery cells leads to differences in specific resistivity, causing a shortened lifespan due to variance in voltages among cells.

Innovation Solution

A storage battery module design featuring a first plate-shaped member with connecting conductors and a second plate-shaped member with a heat dispersion region, where the heat dispersion region has higher thermal conductivity than a threshold, opposing the connecting conductors across an insulating member with a thickness less than or equal to a first threshold, to disperse heat generated by the conductors.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If FPC substrates are used to electrically connect battery cells, then electrical connection is achieved, but temperature variance among battery cells increases

Engineering Contradiction:

Improveelectrical connection reliabilityVSAvoidtemperature variance among battery cells

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The patent divides the connection system into separate functional layers: the first plate-shaped member handles electrical connection through connecting conductors, while the second plate-shaped member handles thermal management through heat dispersion regions. This segmentation allows each component to optimize its specific function without compromising the other.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The first plate-shaped member serves dual functions: it provides electrical connection through its connecting conductors and simultaneously acts as a thermal management component through its heat dispersion regions. This multi-functionality reduces the need for separate components and improves overall system efficiency.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Power

If battery cells are arranged in series, then voltage output increases, but temperature variance and lifespan disparity among cells worsen

Engineering Contradiction:

Improvevoltage outputVSAvoidlifespan of battery module

Core Design Contradiction:

PowerVSDuration of action of stationary object

Solution Approach 1:

The patent applies different properties to different regions of the plate-shaped members: heat dispersion regions are strategically positioned opposite to connecting conductors to locally address temperature hotspots. This local quality approach ensures that thermal management is targeted where it is most needed, preventing uniform temperature variance across all cells.

Inventive Principle:

Principle #3Local quality

3Productivity

If connecting conductors are placed close to battery terminals, then electrical connection efficiency improves, but heat transfer to surrounding cells increases

Engineering Contradiction:

Improveelectrical connection efficiencyVSAvoidheat transfer to surrounding cells

Core Design Contradiction:

ProductivityVSTemperature

Solution Approach 1:

The insulating member acts as an intermediary between the first plate-shaped member (containing connecting conductors) and the second plate-shaped member (containing heat dispersion regions). This intermediary allows controlled thermal interaction while maintaining electrical insulation, enabling the system to manage heat effectively without compromising electrical connection efficiency.

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 design effectively suppresses temperature variance among battery cells, prolonging the lifespan of the battery module by efficiently dispersing heat and maintaining consistent voltages across cells.

Implementation Method 1

the second plate-shaped member has a heat dispersion region formed by a member that has a thermal conductivity that is greater than or equal to a second threshold

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS11038221B2Storage battery module with a heat dissipating plate for interconnecting battery cells

Publication Date: 2021.06.15 MITSUBISHI ELECTRIC CORP

AI summary

This storage battery module includes battery cells, a first plate-shaped member, and a second plate-shaped member opposing the first plate-shaped member across an insulating member. The first plate-shaped member has conductors formed therein. The second plate-shaped member has formed therein a heat dispersion region opposing at least a portion of the conductors of the first plate-shaped member across the insulating member. Heat generated in the conductors of the first plate-shaped member is transferred to the heat dispersion region of the opposing second plate-shaped member, and the heat is dispersed inside the heat dispersion region.