Rechargeable Battery Insulating Member Arc Absorption
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Solution Overview
Problem
Rechargeable batteries face damage from abnormal currents, which can cause explosions or ignition, and existing fuses may malfunction at inappropriate temperatures, leading to further issues.
Innovation Solution
A rechargeable battery design featuring an electrode assembly, case, and electrode connection assembly with an insulating member between the terminal and current collector, and a connection member with a fuse part, where the insulating member overlaps with the connection member to absorb arcs and heat, preventing electrode damage and ensuring proper fuse operation across a predetermined temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fuse is installed between the electrode and terminal to prevent damage from abnormal current, then battery safety is improved, but the electrode may be damaged by arc or heat generated when the fuse breaks
Solution Approach 1:
An insulating member is introduced as an intermediary component between the fuse and the electrode/terminal. This insulating member absorbs the arc and heat generated when the fuse breaks, preventing direct damage to the electrode while still allowing the fuse to perform its protective function. The insulating member acts as a buffer that mediates between the fuse's protective action and the electrode's vulnerability to thermal and electrical damage.
2Device complexity
If the fuse contacts other elements of the battery to ensure proper positioning, then device complexity is reduced, but abnormal operation may occur when the fuse breaks at temperatures higher or lower than predetermined
Solution Approach 1:
The insulating member is designed with a segmented structure that includes a fuse receiving portion and an electrode shielding portion. This segmentation allows the insulating member to independently fulfill multiple functions: providing a dedicated receptacle for the fuse that ensures proper positioning without contact with other elements, and simultaneously shielding the electrode from arc and heat. The segmented design prevents the fuse from contacting battery elements while maintaining operational reliability across temperature variations.
3Manufacturing precision
If the insulating member directly contacts the current collector to ensure insulation, then manufacturing precision is improved, but the fuse may still contact other elements causing abnormal operation
Solution Approach 1:
The insulating member is divided into functionally distinct segments: a fuse receiving portion that isolates the fuse from contact with battery elements, and an electrode shielding portion that protects the electrode from arc and heat. This segmentation ensures that even though the insulating member contacts the current collector for positioning and insulation, the fuse remains isolated in its dedicated receptacle, preventing abnormal operation while maintaining manufacturing precision.
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 electrode damage from abnormal currents and ensures stable operation by absorbing arcs and heat, maintaining the battery in a neutral state and preventing abnormal operations due to temperature deviations.
Implementation Method 1
the electrode of the rechargeable battery may be damaged by an arc or heat generated when the fuse is broken by the abnormal current
Implementation Method 2
the portion of the insulating member is configured to overlap with the connection member... absorbing arcs and heat
Data Source
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AI summary
A rechargeable battery includes an electrode assembly; a case housing the electrode assembly; and an electrode connection assembly electrically coupled to the electrode assembly, the electrode connection assembly including: a terminal; a current collector electrically coupled to the electrode assembly; an insulating member between the terminal and the current collector, wherein a portion of the insulating member is spaced from the terminal and the current collector; and a connection member electrically coupling the terminal and the current collector, the connection member including a fuse part, wherein the portion of the insulating member overlaps with the connection member.