Battery Pack Cover With Inclined Discharge Part
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Solution Overview
Problem
Rechargeable battery packs face challenges in safely and efficiently discharging gases and erupting materials from unit cells, which can lead to secondary contamination of adjacent cells and limited discharge pathways.
Innovation Solution
A pack cover design with a discharge part featuring an inclined bottom member, apertures corresponding to vent holes, and a cell barrier member that provides fluid communication and a discharge path for gases and materials, ensuring safe and effective discharge of erupted content away from the unit cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional pack cover design is used, then the structure is simple, but the discharge of gases and erupted materials is inefficient and causes secondary contamination
Solution Approach 1:
The pack cover is divided into multiple functional segments: a discharge part with inclined bottom member for directional discharge, a cell barrier member for isolation, and multiple apertures for fluid communication. This segmentation allows each component to perform its specific function efficiently, resolving the contradiction between safety effectiveness and structural simplicity.
Solution Approach 2:
The cell barrier member acts as an intermediary element between the unit cells and the discharge part. It provides fluid communication through apertures while preventing direct contact between erupted materials and adjacent cells, thus enabling safe discharge without requiring complex containment structures.
2Productivity
If the pack cover is placed close to the unit cell, then the discharge path is short, but the risk of contamination to adjacent cells increases
Solution Approach 1:
The harmful erupted materials are extracted from the unit cell environment through the vent hole and directed through the discharge part. The cell barrier member with its apertures allows this extraction to occur efficiently while preventing the harmful materials from reaching adjacent cells, thus resolving the contradiction between discharge efficiency and contamination prevention.
Solution Approach 2:
The discharge part features an asymmetric inclined bottom member that directs discharged materials away from adjacent cells. This asymmetric design creates a preferential discharge path that maintains efficiency while preventing contamination, without requiring the pack cover to be positioned far from the unit cells.
3Quantity of substance
If multiple unit cells are connected, then the battery capacity increases, but the risk of secondary contamination between cells increases
Solution Approach 1:
The cell barrier member is divided into multiple apertures, each corresponding to a vent hole of a respective unit cell. This segmented design allows each cell to discharge independently through its own aperture while the barrier member prevents cross-contamination between cells, enabling increased battery capacity without compromising safety.
Solution Approach 2:
The cell barrier member serves multiple functions simultaneously: it provides fluid communication for each unit cell through its apertures, acts as a protective barrier against secondary contamination, and maintains structural integrity for multiple cells. This multi-functionality allows safe operation of multi-cell configurations without requiring additional protective structures for each cell.
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 allows for stable and efficient discharge of gases and materials from unit cells, reducing the risk of secondary contamination and enhancing the safety and performance of the rechargeable battery pack.
Implementation Method 1
a bottom member that is sloped with respect to the top end of the unit cell
Implementation Method 2
aperture providing fluid communication between the vent hole and the discharge part
Implementation Method 3
The vent plate may be openable in response to a predetermined internal pressure being exceeded in the unit cell
Data Source
AI summary
A battery pack includes at least one unit cell with a top end, the unit cell including a vent hole, and a pack cover over the top end of the unit cell. The pack cover includes a discharge part having a bottom member that is sloped with respect to the top end of the unit cell. The bottom member of the pack cover including an aperture corresponding to the vent hole of the unit cell.