Battery Module Reinforcement Venting for Thermal Runaway Mitigation
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Solution Overview
Problem
Thermal runaway in electric power storage modules due to deposition of electrically conductive foreign matter, which is caused by gas discharge that remains in the region defined by reinforcement members, leading to increased internal pressure and potential module failure.
Innovation Solution
The design includes a reinforcement member with specific hole sections and smoke discharge sections positioned to efficiently direct gas and conductive debris away from the module, preventing deposition and reducing thermal influence between adjacent modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the electric power storage module is disposed in the region defined by the reinforcement member and the like, then the structural strength is improved, but the gas discharged from the module remains in the region causing thermal runaway
Solution Approach 1:
The harmful gas and conductive foreign matter are extracted from the enclosed region by introducing hole sections in the reinforcement member. These holes create escape paths that remove the harmful substances (gas and debris) from the confined space, preventing their accumulation and subsequent thermal runaway effects on adjacent modules.
Solution Approach 2:
The hole sections in the reinforcement member act as intermediary channels between the internal space of the electric power storage module and the external environment. These intermediaries allow controlled passage of gas and foreign matter, mediating between the need for structural integrity (solid reinforcement member) and the need for hazard release (openings for gas escape).
2Productivity
If the smoke discharge section is provided lower than the middle of the electric power storage module, then the gas discharge efficiency is improved, but the conductive foreign matter is deposited in the region
Solution Approach 1:
The solution adds a spatial dimension to the debris removal system by positioning hole sections at different heights and locations on the reinforcement member. This multi-level arrangement creates three-dimensional escape paths that capture both low-lying gas (from lower smoke discharge) and suspended conductive foreign matter throughout the vertical space, preventing deposition in any single region.
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
Prevents thermal runaway by minimizing the impact of conductive debris on adjacent modules, maintaining internal pressure stability and preventing seal failure.
Implementation Method 1
The smoke discharge section discharges gas in the electric power storage module in a case where the internal pressure of the electric power storage module increases
Implementation Method 2
The first hole section provides communication between the first space and the hollow section. A second space is provided between the second electric power storage module and the reinforcement member. A second hole section is provided on the second wall section. The second hole section provides communication between the second space and the hollow section.
Data Source
AI summary
An electric power storage apparatus includes a first electric power storage module, a second electric power storage module, and a reinforcement member disposed between these electric power storage modules. The reinforcement member includes a first wall section facing the first electric power storage module and a second wall section facing the second electric power storage module. A hollow section is provided between the first and second wall sections. A first space is provided between the first electric power storage module and the reinforcement member. A first hole section is provided on the first wall section. The first hole section communicates between the first space and the hollow section. A second space is provided between the second electric power storage module and the reinforcement member. A second hole section is provided on the second wall section. The second hole section communicates between the second space and the hollow section.