Battery Module Circuit Board Expansion Hole for Airflow Cooling

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Solution Overview

Problem

Conventional battery modules lack a mechanism to cool the circuit board effectively when its temperature rises, as the via holes used for temperature detection do not allow air flow, preventing heat dissipation.

Innovation Solution

A battery module design that incorporates an expansion hole extending from the mounting hole on the circuit board, allowing air to flow through and cool the circuit board when it heats up, while maintaining sufficient fastening rigidity with a screw system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If a via hole is formed in the circuit board for temperature detection, then temperature sensing capability is improved, but air flow is blocked preventing cooling

Engineering Contradiction:

Improvetemperature detection accuracyVSAvoidcircuit board temperature

Core Design Contradiction:

Measurement precisionVSTemperature

Solution Approach 1:

The via hole structure is segmented into two distinct parts: a first via hole for temperature sensing and a second via hole (expansion hole) for air flow and cooling. This segmentation allows each via hole to serve its specific function independently, resolving the contradiction between temperature detection and cooling capabilities

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The second via hole acts as an intermediary element that facilitates air flow through the circuit board. This intermediary structure enables cooling functionality without interfering with the temperature sensing function of the first via hole, allowing both functions to coexist

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If a fastening member is inserted into the mounting hole to secure the circuit board, then fastening strength is improved, but the hole blocks air flow

Engineering Contradiction:

Improvefastening strengthVSAvoidcircuit board temperature

Core Design Contradiction:

StrengthVSTemperature

Solution Approach 1:

The hole structure is segmented into a mounting hole for fastening and a separate expansion hole for air flow. The fastening member is inserted into the mounting hole while the expansion hole remains open to allow air passage, thus maintaining both fastening strength and cooling functionality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The cooling function is extracted from the mounting hole by creating a separate expansion hole. This allows the mounting hole to be dedicated to fastening purposes while the expansion hole handles air flow, eliminating the conflict between these two functions

Inventive Principle:

Principle #2Taking out (Extraction)

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 expansion hole enables effective cooling of the circuit board by allowing air flow, preventing overheating and ensuring reliable operation of the battery module.

Implementation Method 1

an expansion hole extending from the mounting hole... may cool a circuit board through an expansion hole

Methodology Applied

Scientific EffectConvection: Convection

Data Source

PatentUS12148904B2Battery module, and battery pack and vehicle comprising same

Publication Date: 2024.11.19 LG ENERGY SOLUTION LTD

AI summary

A battery module, and a battery pack and a vehicle including the battery module, includes a battery cell stack in which a plurality of battery cells are stacked, a case configured to accommodate the battery cell stack, a circuit board disposed at the case, a mounting hole formed in the circuit board so that a fastening member is inserted therein to fix the circuit board, and an expansion hole configured to extend from the mounting hole.