Battery Pack Housing Recesses for Isolated Cell Pressure Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery packs face challenges in enhancing safety due to mutual impact between battery cells, particularly during pressure relief mechanisms' emissions, which can lead to reduced safety and potential risks.
Innovation Solution
The battery pack design incorporates a pressure relief mechanism with a recessed portion and protruding portions to isolate emissions from one battery cell, allowing gases or liquids to be expelled externally, reducing pressure and enhancing safety by separating the pressure relief mechanisms between cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If battery cells are arranged closely to increase energy density, then productivity and space utilization are improved, but the mutual impact between cells during pressure relief emissions increases, reducing safety
Solution Approach 1:
The battery housing is segmented into multiple independent recessed portions, each accommodating a specific battery cell's pressure relief mechanism. This segmentation isolates the emission paths of different cells, preventing mutual impact while maintaining close cell arrangement for high energy density.
Solution Approach 2:
The inner surface of the battery housing features localized recessed portions with different geometries positioned at specific locations corresponding to each battery cell's pressure relief mechanism. This local structural modification directs emissions from each cell into its own dedicated space, reducing harmful interactions between adjacent cells while preserving overall compactness.
2Ease of manufacture
If the battery housing structure is simplified to reduce manufacturing complexity, then ease of manufacture is improved, but the ability to isolate pressure relief emissions between cells is reduced
Solution Approach 1:
The recessed portions are pre-formed as integral features of the battery housing during the housing manufacturing process itself, rather than being added as separate components. This preliminary integration ensures emission isolation capability is built into the basic housing structure without significantly increasing manufacturing steps or complexity.
Data Source
AI summary
A battery pack includes a battery housing and a battery cell. The battery housing includes a first wall and a first protruding portion that protrudes beyond an inner surface of the first wall. The first protruding portion and the first wall form a first recessed portion. The battery cell is accommodated in the battery housing. A pressure relief mechanism is disposed at one end, oriented toward the first wall, of the battery cell along a first direction. The end, oriented toward the first wall, of the battery cell is connected to the first protruding portion. Along the first direction, a projection of the pressure relief mechanism is located within a projection of the first recessed portion. Through the above structure, the first protruding portion and the first wall can separate the pressure relief mechanism of one battery cell from that of other battery cells.