Battery Central Member for Internal Heat Dissipation

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Solution Overview

Problem

Lithium batteries face challenges with uneven heat distribution and accumulation at the roll current convergence point due to the insulation layer, leading to increased risk of thermal runaway and potential explosion, as existing heat dissipation methods primarily focus on outer battery shells and do not effectively address internal heat dissipation.

Innovation Solution

A battery design incorporating a central member made of highly thermally conductive material with bending portions acting as terminal connection and heat dissipation fins, allowing for both heat and electricity to be conducted through a coated metal substrate, separating the electrically conductive and thermally conductive paths, and connecting the thermally conductive portion to an external heat dissipation device.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If heat dissipation fins are disposed on the outer battery shell, then heat outside the battery shell is removed, but the uneven temperature distribution inside the battery cannot be prevented and heat accumulation at the roll current convergence point cannot be avoided

Engineering Contradiction:

Improveheat dissipationVSAvoidthermal runaway risk

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The patent extracts the heat dissipation function from the outer battery shell and relocates it to the central member inside the battery. The central member is designed with high thermal conductivity to actively conduct heat away from the roll current convergence point, separating the heat dissipation function from the protective shell structure.

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The central member acts as an intermediary between the heat-generating electrodes and the external environment. It provides a dedicated thermal conduction path that mediates heat transfer from the internal convergence point to the external heat dissipation fins, enabling controlled heat management.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If the roll current convergence point is disposed in the center of the battery, then currents are channeled out and the battery container is easy to be sealed, but a great amount of heat accumulates at the center causing uneven temperature distribution

Engineering Contradiction:

Improvebattery sealingVSAvoidheat accumulation

Core Design Contradiction:

Ease of manufactureVSTemperature

Solution Approach 1:

The patent merges the electrical conduction function and thermal conduction function into a single central member structure. The central member serves both as the current convergence point for electrical connection and as a heat dissipation conduit, combining two functions that were previously separated into different components.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The central member is designed with multi-functionality, serving simultaneously as an electrical current collector and a thermal management device. This universal component handles both electrical and thermal loads, eliminating the need for separate structures and simplifying the overall battery design.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 ensures even heat distribution within the battery, reduces temperature differences, and lowers the risk of thermal runaway by efficiently dissipating heat through the central member, thereby enhancing battery safety and reliability.

Implementation Method 1

The central member is used as a thermally and electrically conductive channel. Heat and electricity are both guided towards the central member through a coated metal substrate and further guided towards the terminal portions of the battery.

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS9059487B2Battery with soaking plate for thermally and electrically conductive channel

Publication Date: 2015.06.16 IND TECH RES INST

AI summary

A battery with a soaking plate for a thermally and electrically conductive channel includes a plurality of battery rolls and two cap assemblies. Each of the battery rolls includes a central member and at least one electrode piece. Each of two ends of the central member has a bending portion. The electrode piece at least includes a positive electrode layer and a negative electrode layer. The electrode piece is winding around the central member. The battery rolls are disposed in parallel, and the bending portions at the two ends are formed as terminal disposed portions. The two cap assemblies are disposed at the terminal disposed portions.