Battery Module Vent Structure for Cooling and Debris Blocking
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Solution Overview
Problem
Existing battery modules are susceptible to the entry of foreign substances through ventilation ports, which can damage the battery cells.
Innovation Solution
A battery module design featuring a labyrinthine flow path for ventilation holes formed by connecting portions between holding members, along with communication holes covered by a grip member, to prevent foreign substance entry and facilitate drainage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a simple vent hole is provided in the accommodation case, then ventilation and heat dissipation are improved, but foreign substances can easily enter and damage battery cells
Solution Approach 1:
The vent hole is designed with a curved, meandering flow path instead of a straight line. The connecting portion creates a serpentine structure that forces air to follow a curved trajectory, making it difficult for foreign substances to penetrate directly while maintaining adequate ventilation for heat dissipation.
Solution Approach 2:
The connecting portion acts as an intermediary structure between the vent hole openings and the battery cells. It provides a mediating flow path that allows air to pass through for cooling while blocking direct access for foreign substances, thus protecting the battery cells indirectly.
2Object-affected harmful factors
If the vent hole is covered by a filter or protective structure, then foreign substance entry is reduced, but the structure becomes more complex and material costs increase
Solution Approach 1:
The protective function is merged with the existing connecting portion structure that already exists to hold the battery cells. Instead of adding a separate filter or protective component, the connecting portion itself is designed to create the protective meandering flow path, combining structural support and foreign substance prevention functions.
Solution Approach 2:
The connecting portion serves multiple functions: it holds the battery cells in position, provides structural support for the pack, and creates the meandering flow path to prevent foreign substance entry. This multi-functionality eliminates the need for separate protective components, reducing overall structural complexity.
Data Source
AI summary
The present invention provides a battery module comprising: a cell assembly formed by sandwiching a plurality of battery cells by a pair of holding members; and an accommodation case configured to accommodate the cell assembly, wherein the accommodation case includes a vent hole for gas, and wherein a flow path passing through the vent hole is formed in a labyrinth structure by covering the vent hole by a connecting portion between the pair of holding members.