Bus Bar Cooling Layout for Battery Module Electrode Heat Dissipation

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Solution Overview

Problem

Existing battery modules face challenges in efficiently cooling battery cells, which can lead to reduced performance and lifespan due to heat buildup.

Innovation Solution

The implementation of a battery module configuration where a cooling member is in contact with the back side of the bus bar portions that connect the battery cell electrodes, allowing for efficient heat dissipation from the electrodes to the cooling member.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If conventional battery module configuration is used without dedicated cooling contact, then device complexity is reduced, but cooling efficiency deteriorates due to insufficient heat dissipation from battery cells

Engineering Contradiction:

Improvecooling efficiencyVSAvoiddevice complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The cooling member is integrated with the bus bar structure, merging the electrical connection function and cooling function into a single component. The cooling member includes a contact portion that directly contacts the bus bar at the electrode connection location, eliminating the need for separate cooling systems and improving cooling efficiency while maintaining simplicity

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The cooling member acts as an intermediary between the bus bar and the cooling medium. It receives heat from the bus bar through thermal conduction and transfers it to the cooling medium, enabling efficient heat dissipation from the battery cells without requiring direct contact between the bus bar and complex cooling systems

Inventive Principle:

Principle #24Intermediary (Mediator)

2Temperature

If cooling member is added to improve cooling efficiency, then temperature control is improved, but device complexity increases due to additional components

Engineering Contradiction:

Improveheat dissipationVSAvoiddevice complexity

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The bus bar structure serves dual functions: electrical connection and heat dissipation. By integrating the cooling member with the bus bar, the system achieves multi-functionality where the same structural element performs both electrical conduction and thermal management, reducing the need for additional components

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 configuration effectively dissipates heat from the battery cells, enhancing their cooling efficiency and thereby improving the performance and lifespan of the battery module.

Implementation Method 1

a cooling member that contacts, in a heat transferable manner, a back side of portions of the bus bar that contact the electrodes

Methodology Applied

Scientific EffectHeat transfer: Conduction (thermal)

Data Source

PatentUS20250132412A1Battery module

Publication Date: 2025.04.24 HONDA MOTOR CO LTD

AI summary

To allow battery cells to be efficiently cooled. A battery module includes a plurality of battery cells, at least one bus bar, and a cooling member. The bus bar electrically connects electrodes of the plurality of battery cells to each other. The cooling member contacts, in a heat transferable manner, the back side of portions of the bus bar that contact the electrodes. According to this configuration, the heat transferred from the electrodes of the battery cells to the bus bar can be dissipated to the cooling member on the back side of the electrodes. Therefore, the battery cells can be efficiently cooled.