Internal Heating Trigger for Realistic Battery Thermal Runaway
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Solution Overview
Problem
Current methods for simulating thermal runaway in batteries are inefficient and difficult to replicate the actual process, often damaging the battery cell or requiring excessive energy, which limits their effectiveness in testing safety measures.
Innovation Solution
A thermal runaway trigger method involving a heating member placed inside the battery cell to heat the internal components, such as the separator, to induce a controlled thermal runaway without damaging the cell structure, allowing for a more realistic simulation with reduced energy input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional external heating methods are used to trigger thermal runaway, then the battery cell structure is damaged, but the simulation accuracy is reduced
Solution Approach 1:
The heating member is nested inside the battery cell, placing the heat source within the cell structure rather than externally. This allows thermal runaway initiation without damaging external cell components, maintaining structural integrity while achieving accurate simulation of internal thermal events.
Solution Approach 2:
The heating member acts as an intermediary device that triggers thermal runaway through internal heating without requiring external force or damage to the cell. It mediates between the testing requirement and cell integrity by providing controlled internal heat generation.
2Loss of energy
If traditional thermal runaway triggering methods are used, then excessive external energy is required, but the energy efficiency is reduced
Solution Approach 1:
The heating member utilizes periodic or cyclic heating cycles to efficiently build up thermal energy within the cell. By applying heat in controlled cycles rather than continuous high-energy input, the system achieves thermal runaway with reduced total external energy consumption.
Solution Approach 2:
The heating member changes thermal parameters (temperature, heat distribution) directly within the cell to initiate thermal runaway. This internal parameter modification requires less external energy compared to traditional methods that must overcome external thermal barriers.
3Productivity
If heating members are placed inside battery cells, then heat loss is reduced and thermal runaway is triggered faster, but the device complexity increases
Solution Approach 1:
The heating member serves multiple functions: it acts as a heat source for triggering thermal runaway, a temperature sensor for monitoring, and a control element for regulating the thermal process. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity.
Solution Approach 2:
The heating member is designed to self-regulate and self-trigger thermal runaway based on predetermined conditions without requiring complex external control systems. It autonomously generates and distributes heat within the cell, reducing the need for additional control mechanisms.
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 method enables a more realistic simulation of thermal runaway processes while minimizing structural damage and energy consumption, facilitating the development of effective safety measures to reduce thermal runaway risks and losses.
Implementation Method 1
heating the inside of the battery cell by the heating member, so as to cause a thermal runaway of the battery cell
Implementation Method 2
heating a separator of an electrode assembly of the battery cell by the heating member to melt the separator, so as to cause a short-circuit inside the battery cell
Data Source
AI summary
A thermal runaway trigger method relates to the technical field of batteries. The thermal runaway trigger method includes: providing a battery cell and a heating member arranged in the battery cell; and heating the inside of the battery cell by the heating member, so as to cause a thermal runaway of the battery cell. The heating member is arranged inside the battery cell, and the heating member heats the inside of the battery cell to cause the thermal runaway of the battery cell, so that the inside of the battery cell can be heated to cause the thermal runaway of the battery cell in a relatively short time. Due to the reduced internal space of the battery cell, the range of diffusion of the heating member inside the battery cell is small, and the heat loss of the heating member is relatively small.