Rechargeable Battery Interior Safety Member for Short-Circuit Protection
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Solution Overview
Problem
Rechargeable batteries face safety risks due to potential short-circuiting when a conductive foreign material penetrates, leading to excessive heat generation and potential explosion or combustion.
Innovation Solution
The battery design incorporates interior safety members with connection portions that electrically connect to the negative electrode, allowing for safe discharge of current and heat absorption when a foreign material penetrates, preventing direct short-circuiting of the positive and negative electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conductive foreign material penetrates the battery, then electrical connection is established, but short-circuiting occurs leading to excessive heat generation and safety hazards
Solution Approach 1:
The interior safety member acts as an intermediary component positioned between adjacent electrode assemblies. When a conductive foreign material penetrates the battery and contacts the interior safety member, it creates a controlled electrical path through the safety member rather than allowing direct short-circuiting between positive and negative electrodes. This mediator approach prevents harmful short-circuits while maintaining operational reliability.
Solution Approach 2:
The interior safety member is pre-installed between electrode assemblies before battery operation, establishing a protective barrier in advance. The safety member's electrical connection to the negative electrode is prepared beforehand, so when penetration occurs, the controlled discharge path is already in place, preventing uncontrolled short-circuiting and heat generation.
2Reliability
If the interior safety member is electrically connected to the negative electrode, then current can be safely discharged, but the structure becomes more complex
Solution Approach 1:
The interior safety member serves multiple functions: it provides physical separation between adjacent electrode assemblies, acts as an electrical conductor for safe current discharge, and serves as a structural support element within the battery. By combining these functions into a single component, the design achieves enhanced safety without proportionally increasing structural complexity.
Solution Approach 2:
The interior safety member integrates the separation function and electrical connection function into a single unified component. Rather than using separate elements for physical separation and electrical connection, the safety member combines both roles, simplifying the overall structure while maintaining safety 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
This design enhances the safety of rechargeable batteries by ensuring safe discharge of current and absorption of heat generated by a penetrating foreign material, reducing the risk of explosion or combustion.
Implementation Method 1
an interior safety member including an interior plate between the electrode assemblies
Implementation Method 2
the interior safety member being electrically connected to at least one of the plurality of electrode assemblies
Data Source
AI summary
A battery includes a plurality of electrode assemblies arranged in a case, each electrode assembly including a first electrode, a second electrode and a separator between the first electrode and the second electrode, and an interior safety member including an interior plate between the electrode assemblies, the interior safety member being electrically connected to at least one of the plurality of electrode assemblies.