Battery Pack Cell Valve Layout to Prevent Debris Clogging
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Solution Overview
Problem
The cell valve in battery packs can become clogged with debris during smoke emission, which is a common issue in existing battery pack designs.
Innovation Solution
The battery pack design includes rotatable first and second doors for the cell and case opening portions, forming a spacious H-shape or modified H-shape to facilitate debris discharge, preventing clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single door cell valve is used, then the structure is simple, but debris can clog the valve during smoke emission
Solution Approach 1:
The cell valve is divided into two separate doors (first door and second door) instead of using a single door structure. This segmentation allows debris to be discharged through one door while the other door remains open, preventing clogging that would occur with a single door design.
Solution Approach 2:
The patent introduces a spatial dimension by creating an H-shaped discharge path with two doors positioned at different locations. This dimensional change allows debris to be discharged through multiple pathways simultaneously, preventing clogging that would occur in a single-path design.
2Area of moving object
If the cell opening portion is made small, then the cell valve size is reduced, but debris passage becomes restricted
Solution Approach 1:
The cell opening portion is divided into two separate door openings (first door opening and second door opening) positioned at different locations. This segmentation allows the overall valve area to be distributed across multiple openings, maintaining adequate debris passage capacity while keeping individual door sizes manageable.
Solution Approach 2:
The patent distributes the discharge function across two spatially separated door openings arranged in an H-configuration. This dimensional arrangement increases the effective discharge area and provides multiple pathways for debris, improving discharge efficiency without requiring an excessively large single opening.
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 effectively prevents the cell valve from becoming clogged with debris by ensuring easy passage of high-pressure debris through the cell and case opening portions.
Implementation Method 1
The first door and the second door may each be rotatable about an axis extending along a longitudinal direction of each of the battery cells.
Data Source
AI summary
A battery pack according to the present disclosure is to be mounted on a vehicle, and includes, in a state in which the battery pack is mounted on a vehicle cabin lower side of the vehicle: a plurality of battery cells stacked in a front-rear direction of the vehicle; and a case that accommodates the battery cells. Each of the battery cells includes a cell opening portion and a cell valve. The cell opening portion is provided in a bottom surface. The cell valve is provided in the cell opening portion. The case includes a case opening portion communicating with the cell opening portion. The cell opening portion includes a first side and a second side that faces the first side. The cell valve includes a first door and a second door. The first door is provided on the first side. The second door is provided on the second side.