Battery Pack Venting Structure to Prevent Exhaust Passage Clogging
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Solution Overview
Problem
Existing battery packs with small exhaust ducts can become clogged when a large amount of gas is released, and the configuration often requires additional components, increasing complexity and cost.
Innovation Solution
A battery pack design featuring a case with integrated exhaust passages that face the safety valves of the battery cells, along with a sealing member to define the exhaust passage, allowing for efficient release of gases without the need for additional components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a small exhaust duct is used, then the device complexity is reduced, but the exhaust passage becomes clogged when a large amount of spouting object is released
Solution Approach 1:
The exhaust passage is integrated directly into the case structure, merging the exhaust function with the housing. This eliminates the need for separate exhaust duct components while maintaining reliable gas release capability, thus reducing device complexity without causing clogging issues
Solution Approach 2:
The case serves multiple functions: it houses the battery module and simultaneously provides the exhaust passage for gas release. This multi-functional design eliminates the need for dedicated exhaust components, reducing overall device complexity while ensuring reliable exhaust functionality
2Reliability
If an exhaust duct is disposed on top of a resin frame, then the exhaust function is achieved, but the number of components increases
Solution Approach 1:
The exhaust passage is formed as an integral part of the case structure rather than as a separate component. The case simultaneously provides structural housing and exhaust functionality, eliminating the need for additional exhaust duct components and reducing the total number of parts
Solution Approach 2:
The case is designed to perform dual functions: mechanical housing of the battery module and provision of exhaust passages. This multi-functional design achieves reliable exhaust function while minimizing component count by making the case itself serve as the exhaust system
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 design enables efficient and safe release of gases from the battery pack, preventing clogging and reducing the number of components, thus improving safety and reducing costs.
Implementation Method 1
a sealing member provided between the case and the battery module and arranged around the exhaust passage to define the exhaust passage
Implementation Method 2
an exhaust passage provided in the case along the first direction and arranged at a position facing the safety valves in a second direction
Data Source
AI summary
A battery pack includes a battery module including a plurality of battery cells each having a safety valve to open when an internal pressure of the battery cell increases, the battery cells being stacked; a case housing the battery modules; an exhaust passage provided, along a first direction, at a position facing the safety valves in the case in a second direction; and a sealing member provided between the case and the battery module and arranged around the exhaust passage to define the exhaust passage.