Battery Thermal Runaway Test Stand With Spaced Temperature Sensors
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Solution Overview
Problem
Existing methods for evaluating materials to prevent thermal propagation in batteries are not standardized, leading to non-comparable test results and inadequate assessment of materials' effectiveness in real-world conditions.
Innovation Solution
A test stand with a housing containing activatable initiation cells, multiple battery cells arranged in patterns, and temperature sensors at varying distances to record temperature changes during thermal runaway, allowing for detailed analysis of thermal propagation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If non-standard test setups are used for evaluating materials in battery thermal runaway scenarios, then each manufacturer can use their own battery design for testing, but the test results become non-comparable and lack standardization
Solution Approach 1:
The patent applies parameter changes by standardizing critical test parameters including the arrangement of battery cells in a honeycomb pattern, positioning temperature sensors at specific distances from the initiation cell, and controlling the spacing between cells. These standardized parameters enable comparable test results across different manufacturers while maintaining the adaptability to test various battery materials and configurations.
2Device complexity
If temperature sensors are placed at the same distance from the initiation cell, then the measurement setup is simple, but the thermal propagation dynamics cannot be adequately captured
Solution Approach 1:
The patent applies local quality by positioning temperature sensors at different distances from the initiation cell to capture local thermal conditions at various stages of thermal propagation. This creates a gradient of measurement points that reflect the spatial variation in temperature distribution, enabling accurate characterization of thermal propagation dynamics while maintaining a relatively simple overall sensor arrangement.
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
Enables standardized evaluation of materials' performance in simulating realistic thermal runaway scenarios, providing insights into thermal propagation dynamics and material effectiveness.
Implementation Method 1
a first temperature sensor (70a) and at least one second temperature sensor (70b) being arranged in the inner space (15), a distance A1 between the initiation cell (31) and the first temperature sensor (70a) and a distance A2 between the initiation cell (31) and the second temperature sensor (70b) being different from one another
Data Source
AI summary
The invention relates to a test stand (1) for evaluating a material to be used in a battery under conditions that may occur during a thermal runaway, the test stand comprising a housing (10), wherein in an inner space (15) of the housing (10) at least one activatable initiation cell (31), a plurality of cylindrical battery cells (32, 33, 34, 35, 36) and the material to be evaluated being arranged in the interior space (15) or on the housing (10), a first temperature sensor (70a) and at least one second temperature sensor (70b) being arranged in the inner space (15), a distance A1 between the activatable initiation cell (31) and the first temperature sensor (70a) and a distance A2 between the activatable initiation cell (31) and the second temperature sensor (70b) being different from one another. The invention further relates to a test method using the test stand.