Dual Electrode Assembly Battery Cell for Split-Side Heat Dissipation

Solution Overview

Problem

High-capacity battery cells with multiple electrode assemblies experience heat dissipation issues due to insufficient heat dissipation, leading to safety concerns.

Innovation Solution

The battery cell design includes electrode assemblies with first and second tabs of opposite polarities, connected on different sides to facilitate parallel connection, enhancing heat dissipation by allowing heat to be dissipated from different sides and incorporating features like abutment portions and insulating heat-conducting plates to improve heat transfer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If multiple electrode assemblies are arranged in parallel to increase battery capacity, then the battery capacity is improved, but heat dissipation performance deteriorates due to heat concentration

Engineering Contradiction:

Improvebattery capacityVSAvoidheat dissipation performance

Core Design Contradiction:

Quantity of substanceVSTemperature

Solution Approach 1:

The battery cell divides the electrode assemblies into multiple groups with separate tabs extending from different sides (first side and second side). Each group's tabs are collected separately, creating segmented heat dissipation pathways that prevent heat concentration and improve thermal management while maintaining high capacity through parallel arrangement of multiple electrode assemblies.

Inventive Principle:

Principle #1Segmentation

2Quantity of substance

If multiple electrode assemblies are arranged in parallel to increase battery capacity, then the battery capacity is improved, but safety performance deteriorates due to insufficient heat dissipation

Engineering Contradiction:

Improvebattery capacityVSAvoidsafety performance

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The battery cell divides the electrode assemblies into multiple groups with separate tabs extending from different sides (first side and second side). Each group's tabs are collected separately, creating segmented heat dissipation pathways that prevent heat concentration and improve thermal management while maintaining high capacity through parallel arrangement of multiple electrode assemblies.

Inventive Principle:

Principle #1Segmentation

3Device complexity

If tabs of opposite polarities are connected on the same side to simplify wiring, then wiring complexity is reduced, but short circuit risk increases

Engineering Contradiction:

Improvewiring complexityVSAvoidshort circuit risk

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The battery cell employs asymmetric tab arrangement where first tabs and second tabs extend from opposite sides of the electrode assemblies. This asymmetric configuration spatially separates connections of opposite polarities, eliminating short circuit risks while maintaining wiring simplicity through the structured side-specific connection pattern.

Inventive Principle:

Principle #4Asymmetry

4Temperature

If tabs are extended from different sides to improve heat dissipation, then heat dissipation performance is improved, but wiring complexity increases

Engineering Contradiction:

Improveheat dissipation performanceVSAvoidwiring complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The battery cell divides the electrode assemblies into multiple groups with separate tabs extending from different sides (first side and second side). Each group's tabs are collected separately, creating segmented heat dissipation pathways that prevent heat concentration and improve thermal management while maintaining high capacity through parallel arrangement of multiple electrode assemblies.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The battery cell employs asymmetric tab arrangement where first tabs and second tabs extend from opposite sides of the electrode assemblies. This asymmetric configuration spatially separates connections of opposite polarities, eliminating short circuit risks while maintaining wiring simplicity through the structured side-specific connection pattern.

Inventive Principle:

Principle #4Asymmetry

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 improves heat dissipation and safety performance by reducing heat concentration and simplifying wiring, while maintaining structural integrity and electrical stability.

Implementation Method 1

incorporating features like abutment portions and insulating heat-conducting plates to improve heat transfer

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS20240413495A1Battery cell, battery, electric device, and manufacturing method

Publication Date: 2024.12.12 CONTEMPORARY AMPEREX TECHNOLOGY (HONG KONG) LIMITED

AI summary

A battery cell includes a shell and two electrode assemblies located in the shell. Each electrode assembly includes a main body portion and a first tab and a second tab extending from the main body portion and having opposite polarities. The battery cell includes a first side and a second side oppositely arranged in a height direction of the battery cell. The main body portion of the first electrode assembly has the first tab and the second tab extending from the first side and the first tab extending from the second side. The main body portion of the second electrode assembly has the second tab extending from the first side and the first tab extending from the second side. The two second tabs located on the first side are electrically connected to each other, and the two first tabs located on the second side are electrically connected to each other.