Battery Thermal Release Layer for Thermal Runaway Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Batteries with certain chemistries are sensitive to temperature changes, leading to potential thermal runaway, which existing technologies fail to effectively prevent.
Innovation Solution
Incorporating a thermal release layer made of an electrically non-conductive material that expands upon reaching a specific temperature threshold, disrupting electrical continuity between the electrode and the terminal to prevent further temperature increase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a battery uses certain chemistries to achieve desired performance, then battery performance is improved, but temperature sensitivity increases leading to thermal runaway risk
Solution Approach 1:
The patent introduces a thermal release layer as an intermediary component between the electrode and current collector. This layer contains expandable particles that remain inert during normal operation but activate at elevated temperatures to disrupt electrical continuity, thereby mediating between the high-performance chemistry and thermal safety requirements
Solution Approach 2:
The patent converts the harmful effect of thermal expansion at high temperatures into a beneficial safety mechanism. The expandable particles, which would normally be considered a source of instability, are utilized to deliberately disrupt electrical pathways when temperature exceeds safe thresholds, transforming thermal sensitivity from a liability into a protective feature
2Reliability
If a thermal release layer is added to prevent thermal runaway, then safety is improved, but device complexity increases
Solution Approach 1:
The patent merges the thermal release functionality directly into the electrode structure by incorporating expandable particles within the electrode material itself or as an integrated coating layer. This integration approach combines multiple functions (electrical conduction, thermal response, and safety protection) into a single unified component, reducing overall device complexity
Solution Approach 2:
The patent utilizes parameter changes in the expandable particles (volume expansion upon heating) to achieve thermal protection without requiring complex control systems. The passive, automatic response of the particles to temperature changes eliminates the need for active monitoring and control mechanisms, thereby simplifying the overall device structure
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
Prevents thermal runaway by reducing or disconnecting the electrode from its electrical circuit, thereby managing temperature fluctuations and ensuring safety.
Implementation Method 1
a second material that, in response to a temperature of the electrode exceeding a temperature threshold, expands to reduce the electrical continuity with the terminal
Implementation Method 2
a first material that conducts electricity to establish electrical continuity with the terminal
Data Source
AI summary
A thermal release layer for electrode materials in a battery cell is provided. The battery cell can include a terminal and an electrode, in contact with the terminal. The battery cell can include a first material that conducts electricity to establish electrical continuity with the terminal. The battery call can include a second material that, in response to a temperature of the electrode reaching or exceeding a temperature threshold, expands to reduce the electrical continuity with the terminal.