Tubular Battery Pack Cooling for Thermal Runaway Ejecta
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Solution Overview
Problem
Conventional battery packs fail to effectively cool ejected matter from thermal runaway battery cells, leading to chain reactions and thermal failures that spread fire throughout the pack and damage connected devices.
Innovation Solution
A battery pack design featuring a metal tubular case with integrated heat-absorbing fins and ducts that dissipate thermal energy efficiently, guiding ejected matter to the outside in a cooled state to prevent further thermal runaway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple battery packs are connected in parallel to increase current output, then the current supply capability is improved, but the risk of mutual contamination between positive and negative terminals increases
Solution Approach 1:
The battery pack is divided into multiple independent battery modules, each with its own terminal structure. This segmentation allows parallel connection of multiple packs while isolating terminals physically, preventing contamination between positive and negative terminals of different packs.
Solution Approach 2:
An insulating structure is introduced as an intermediary element between the positive and negative terminals of adjacent battery packs. This insulating structure prevents direct contact and potential contamination while allowing electrical parallel connection through controlled pathways.
2Reliability
If the battery pack structure is made more robust to prevent terminal contamination, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The insulating structure is merged with the existing terminal housing or casing of the battery pack, combining multiple functions (structural support, terminal isolation, and protection) into a single integrated component, thereby reducing overall complexity.
Solution Approach 2:
The terminal housing structure is designed to serve multiple functions: providing mechanical support for terminals, isolating positive and negative terminals through integrated insulating features, and protecting internal components. This multi-functionality reduces the need for separate dedicated components.
Data Source
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AI summary
Thermal energy of batteries is efficiently dissipated to outside, achieving high safety. A battery pack includes a core block (10) including battery cells disposed at predetermined positions in a battery holder (2) and a casing accommodating the core block (10) therein. The casing includes a heat-dissipating case (4) having both end-openings and closing parts closing the both end-openings of the heat-dissipating case (4). The heat-dissipating case (4) includes a tubular part (6) and heat-absorbing fins (7). The tubular part (6) has a tubular shape made of metal, and accommodates the core block therein. The heat-absorbing fins (7) disposed in rows are made of metal and thermally coupled to the inner surface of the tubular part (6), and protrude to an inside from the tubular part and extend in an axial direction of the tubular part (6).