Battery Module Ventilation via Segmented Insulation Cover
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Solution Overview
Problem
Battery modules lack effective gas ventilation mechanisms, leading to potential explosions when internal pressure exceeds safe limits due to the absence of sufficient gas circulation spaces.
Innovation Solution
The implementation of a battery module design featuring first and second rechargeable batteries connected by an interconnector and covered with insulation covers, including ventilation outlets to efficiently expel internal gas when pressure exceeds allowable limits, utilizing materials like polypropylene or polycarbonate for the insulation covers and employing laser or resistance welding for fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery module is sealed without ventilation outlets, then the sealing performance and protection are improved, but the internal gas cannot be ventilated leading to pressure buildup and potential explosion
Solution Approach 1:
The insulation cover is divided into multiple parts (first insulation cover and second insulation cover) with ventilation outlets strategically positioned in each segment, allowing gas to be vented from different locations of the battery module
Solution Approach 2:
The insulation cover acts as an intermediary component between the battery cells and the external environment, providing a controlled pathway for gas venting while maintaining electrical insulation and structural integrity
2Object-generated harmful factors
If ventilation outlets are added to the insulation cover, then gas ventilation is improved, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The insulation cover performs multiple functions simultaneously: it provides electrical insulation between battery components, maintains structural integrity of the battery module, and serves as a ventilation pathway for internal gas through integrated outlets
Solution Approach 2:
The ventilation function is merged into the insulation cover itself rather than being a separate component, combining the insulation and ventilation functions into a single integrated part
3Reliability
If multiple insulation covers are used to cover interconnected portions, then the coverage and protection are improved, but the assembly complexity increases
Solution Approach 1:
The insulation covering is segmented into multiple covers (first and second insulation covers) that correspond to different battery cells or modules, allowing for modular assembly and maintenance while providing comprehensive protection
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 design ensures safe and efficient ventilation of internal gases, preventing explosions by providing a pathway for gas release, thus ensuring the safety and reliability of battery modules.
Implementation Method 1
the ventilation outlet is connected to a space between an upper portion of the first rechargeable battery and a lower portion of the second rechargeable battery, and fluid discharged from the first rechargeable battery may be expelled through the ventilation outlet
Data Source
AI summary
A battery module comprises: first and second rechargeable batteries, each of which includes a casing for storing an electrode assembly and a cap assembly provided on top of the casing; an interconnector provided between an upper portion of the first rechargeable battery and a lower portion of the second rechargeable battery so as to connect the first and second rechargeable batteries with each other; and an insulation cover which covers interconnected portions of the first and second rechargeable batteries, and which has at least one ventilation outlet.