Battery Module Housing Drainage Structure for Liquid Discharge
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Solution Overview
Problem
Current battery modules face challenges in effectively draining liquid from their interior, which can lead to short circuits and compromise safety.
Innovation Solution
The battery module design incorporates a first channel and a first through hole in the housing, allowing liquid to flow from a secondary space to a primary space and be discharged, with optional sealing and drainage enhancements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If liquid drainage channels are added to the battery module housing, then liquid drainage capability is improved, but device complexity increases
Solution Approach 1:
The housing is divided into a first housing and a second housing, with the first housing containing liquid drainage channels (first channel and first through hole) and the second housing containing electronic components. This segmentation allows the drainage function to be integrated into a separate housing module, improving liquid drainage capability while managing structural complexity through functional separation.
Solution Approach 2:
The first housing serves multiple functions: it provides structural support, contains the liquid drainage channels for drainage capability, and houses the heat sink for thermal management. This multi-functionality improves reliability through integrated liquid drainage while avoiding additional complexity from separate dedicated drainage components.
2Productivity
If the first through hole is kept open for drainage, then liquid discharge efficiency is improved, but risk of external liquid intrusion increases
Solution Approach 1:
The first filling member is designed to be movable between a first position (blocking the first through hole) and a second position (allowing liquid to pass through). This dynamic configuration allows the system to switch between drainage mode (high productivity) and protection mode (reduced harmful factors) based on operational needs, resolving the contradiction between discharge efficiency and intrusion risk.
Solution Approach 2:
The battery module incorporates its own liquid drainage and protection system through the integrated first channel and first through hole in the housing, eliminating the need for external drainage components. The system serves itself by providing both drainage capability and protection against external liquid intrusion through the movable filling member.
3Reliability
If the heat sink is sealingly connected to the first housing walls, then sealing performance is improved, but heat dissipation efficiency may be reduced
Solution Approach 1:
The first housing is segmented into multiple walls (first wall, second wall, third wall, fourth wall) with insulation structures positioned at specific locations. This segmentation allows certain areas to have enhanced sealing while other areas maintain thermal conductivity for heat dissipation, resolving the contradiction between sealing performance and heat dissipation efficiency.
Solution Approach 2:
Insulation structures are positioned locally at specific walls or regions of the first housing rather than uniformly across all surfaces. This local quality approach ensures sealing performance is improved where needed while preserving heat dissipation pathways in critical thermal zones, balancing sealing and thermal management requirements.
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 reduces the risk of short circuits and improves safety by facilitating efficient liquid drainage.
Implementation Method 1
The first channel connects the first space and the second space, allowing liquid in the second space to flow through the first channel to the first space and be discharged from the battery module through the first through hole
Data Source
AI summary
A battery module includes a housing, a cell assembly, and a heat sink. The housing includes a first housing and a second housing. The first housing forms a first space. The first housing includes a first wall, a second wall, and a bottom wall. The cell assembly is accommodated in the first space. The heat sink is disposed in the first space, the heat sink, the first housing, the second housing form a second space. Along a first direction, the cell assembly is located between the heat sink and the bottom wall. At least one of the first wall or the second wall is provided with a first channel. The first space is in communication with the second space through the first channel. The first housing is provided with a first through hole in communication with the first space and an exterior.