Battery Collection Assembly for Thermal Runaway Insulation
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Solution Overview
Problem
The risk of high-voltage ignition and battery failure due to thermal runaway in traditional batteries, where conductive media ejected during thermal runaway can cause lap-jointing between terminal posts or housings, leading to unsafe conditions.
Innovation Solution
A battery design featuring a collection assembly within a case to collect conductive media ejected during thermal runaway, preventing lap-jointing and utilizing insulation powder that decomposes to form an insulation medium to wrap the conductive media, thereby avoiding high-voltage ignition and enhancing safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional battery design without collection assembly is used, then device complexity is reduced, but safety deteriorates due to high-voltage ignition risk from conductive media lap-jointing
Solution Approach 1:
The collection assembly acts as an intermediary component between battery cells, providing a designated space to collect conductive media and prevent direct contact between terminal posts of adjacent cells. This mediator structure eliminates the harmful lap-jointing effect while maintaining manageable system complexity through modular design.
Solution Approach 2:
The collection assembly is divided into multiple collection members, each corresponding to specific battery cells, allowing independent collection zones. This segmentation enables targeted protection against conductive media while maintaining overall system safety without requiring complete redesign of the entire battery structure.
2Reliability
If collection assembly is added to collect conductive media, then safety is improved by preventing high-voltage ignition, but device complexity increases
Solution Approach 1:
The collection assembly serves multiple functions: it collects conductive media, provides thermal insulation through insulation powder, and physically separates adjacent battery cells. This multi-functionality reduces the need for additional separate safety components, thereby limiting the increase in overall device complexity while achieving comprehensive safety protection.
3Object-affected harmful factors
If insulation powder is used to wrap conductive media, then harmful factors are reduced by preventing high-voltage ignition, but manufacturing precision requirements increase
Solution Approach 1:
The insulation powder automatically wraps the conductive media through the ejection process itself, where the force and direction of ejected conductive media cause the insulation powder to surround and encapsulate it. This self-service mechanism eliminates the need for precise external control of powder distribution, reducing manufacturing precision requirements while effectively preventing high-voltage ignition.
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 solution effectively prevents high-voltage ignition and improves the safety and reliability of the battery by ensuring that conductive media are insulated and cannot cause series connections between battery cells, thus enhancing the battery's operational safety and service life.
Implementation Method 1
utilizing insulation powder that decomposes to form an insulation medium to wrap the conductive media
Data Source
AI summary
The present application relates to a battery and a power consuming device. The battery includes: a case with an accommodating cavity therein; several battery cells arranged in the accommodating cavity; a collection assembly, which is fitted in the accommodating cavity and is configured to collect a conductive medium ejected when each of the battery cells undergoes thermal runaway.