Battery Cell Adapter Insulation to Prevent Separator Melting
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Solution Overview
Problem
The adapter in a battery cell generates heat during current flow, which can transfer to the electrode assembly and cause a short circuit due to melting of the separator.
Innovation Solution
A heat-insulating structure is provided on the side of the adapter facing the electrode assembly to reduce heat conduction and mitigate the risk of a short circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the adapter is in contact with the body portion of the electrode assembly to achieve conduction, then current flow between the electrode assembly and electrode terminal is enabled, but heat generated by the adapter is transferred to the body portion, causing a risk of short circuit due to melting of the separator
Solution Approach 1:
A heat-insulating structure is introduced as an intermediary between the adapter and the electrode assembly body portion. This heat-insulating structure allows electrical conduction to be maintained while blocking heat transfer, thereby preventing the adapter-generated heat from reaching and melting the separator, thus resolving the contradiction between enabling current flow and preventing heat-induced short circuits
Solution Approach 2:
The heat-insulating structure is specifically positioned at the interface between the adapter and the electrode assembly body portion, providing localized thermal insulation only where needed. This allows the adapter to remain in contact with the electrode assembly for electrical conduction while preventing heat transfer at the critical interface, thus maintaining reliability without compromising electrical functionality
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 heat-insulating structure reduces heat conduction between the adapter and the electrode assembly, preventing the separator from melting and minimizing the risk of a short circuit.
Implementation Method 1
a heat-insulating structure with at least a portion provided on a side of the first adapter facing the body portion... reducing heat conduction between the body portion and the first adapter
Data Source
AI summary
This disclosure provides a battery cell, a battery, and an electric apparatus. The electric apparatus includes the battery, where the battery includes a battery cell, and the battery cell includes an electrode assembly, a first electrode terminal, a first adapter, and a heat-insulating structure. The electrode assembly includes a body portion and a first tab provided on the body portion. The first adapter is conductively connected to the first tab and the first electrode terminal. At least a portion of the heat-insulating structure is provided on a side of the first adapter facing the body portion, so that the first adapter can be isolated from the body portion, mitigating the issue of contact between the first adapter and the body portion, thereby mitigating the issue of the first adapter scorching or melting a separator of the body portion and causing a short circuit in the electrode assembly.