Assembled Battery Gas Flow Path Layout for Efficient Venting
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Solution Overview
Problem
Existing assembled batteries face inefficiencies in gas discharge due to insufficient length of flow paths, retention of gas in non-ideal spaces, and the need for high precision machining, which complicates material and construction methods.
Innovation Solution
The configuration includes a first flow path member, a second flow path member with a smaller cross-sectional area, a connector, and guide members to partition spaces and regulate gas flow, ensuring efficient discharge by minimizing swirling and retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the first flow path is made longer to improve gas discharge efficiency, then gas discharge efficiency is improved, but the device complexity and manufacturing difficulty increase due to space constraints in aggregated battery structures
Solution Approach 1:
The patent transitions from a two-dimensional planar flow path layout to a three-dimensional立体 structure by adding vertical height dimension. The first flow path member extends in the height direction above the battery modules, allowing the flow path to achieve sufficient length without increasing the horizontal footprint. This dimensional change resolves the contradiction by enabling long flow paths in compact aggregated battery structures.
Solution Approach 2:
The first flow path member is positioned above the battery modules and integrates with the existing battery structure. The flow path is nested within the overall battery assembly footprint, utilizing the vertical space above the modules rather than requiring additional horizontal space. This nesting approach allows complex flow path geometry to be achieved without increasing device complexity.
2Productivity
If high precision machining is used to eliminate non-ideal spaces and prevent gas retention, then gas discharge efficiency is improved, but manufacturing cost and complexity increase
Solution Approach 1:
The flow path system is divided into distinct modular components: first flow path members above each battery module, second flow path members for collecting discharged gas, and connector members joining them. Each segment has a simple, standardized geometry that is easy to manufacture. The modular segmentation eliminates the need for high-precision custom machining while ensuring proper gas flow through each section.
Solution Approach 2:
The patent changes the geometric parameters of the flow path components, specifically designing them with simple shapes and standardized dimensions that are compatible with conventional manufacturing processes. The first and second flow path members use basic geometric forms that can be produced with standard tolerances, eliminating the need for high-precision machining while maintaining effective gas discharge performance.
3Productivity
If the flow path cross-sectional area is reduced to improve gas flow velocity, then gas discharge efficiency is improved, but the risk of gas retention due to swirling increases
Solution Approach 1:
The second flow path members are positioned to receive gas from multiple first flow path members at similar elevation levels. The connector members join these flow paths at comparable heights, creating an equipotential flow configuration that promotes uniform gas velocity distribution. This equipotential arrangement prevents localized low-velocity zones where gas could be retained, while still achieving high discharge efficiency through the reduced cross-sectional area of the second flow paths.
Data Source
AI summary
An assembled battery includes: a plurality of batteries, each with a container that contains an electric charger/discharger and an electrolytic solution and a gas discharge unit on its one surface, wherein the plurality of batteries are stacked so that the one surface of each battery is aligned to be flush with the one surface of the other batteries; a metal first flow path member is placed opposite the surface with the gas discharge unit, and configures a first flow path unit for gas discharged from the gas discharge units of the batteries; a second flow path member that forms a second flow path unit with a smaller flow path cross-sectional area; a connector that couples the first and the second flow path unit via an opening in the first flow path member; and a guide member that partitions a space inside the connector. This configuration allows for efficient gas discharge.