Battery Venting Detection Using Thermal Conductivity Signals
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Solution Overview
Problem
Existing technologies lack effective methods for early detection of thermal runaway events in batteries, which can lead to critical situations.
Innovation Solution
An apparatus and method that utilize interface and processing circuitry to receive and analyze measurement signals indicative of the thermal conductivity of a gas atmosphere in a battery, allowing for the detection of a first venting event, which precedes thermal runaway.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If thermal conductivity measurement is used to detect venting events, then early detection capability is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical or electronic sensing systems with a thermal conductivity measurement approach. By measuring the thermal conductivity of the gas atmosphere, the system detects venting events through a simple physical property change, avoiding complex mechanical sensors or electronic monitoring systems while achieving reliable early detection
Solution Approach 2:
The patent utilizes changes in thermal conductivity as a detection parameter. When gas is vented from the battery, the composition and density of the gas atmosphere changes, which directly alters its thermal conductivity. This parameter change provides a simple, reliable indicator of venting events without requiring complex detection mechanisms
2Measurement precision
If thermal conductivity sensing is implemented, then detection precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent replaces precision mechanical sensors or complex electronic detection systems with a thermal conductivity measurement approach. This substitution maintains high detection precision while significantly simplifying manufacturing, as thermal conductivity sensors are simpler to manufacture and calibrate than alternative precision detection systems
Solution Approach 2:
The patent focuses on measuring a fundamental physical parameter (thermal conductivity) that naturally changes during venting events. This approach achieves high measurement precision through simple thermal conductivity sensors rather than complex multi-parameter detection systems, reducing manufacturing complexity while maintaining detection accuracy
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 early detection of thermal runaway events by identifying changes in thermal conductivity associated with the first venting event, thereby preventing potential hazards.
Implementation Method 1
a measurement signal indicative of a thermal conductivity of a gas atmosphere in the battery
Data Source
AI summary
An apparatus for detecting a first venting event of a battery is provided. The apparatus includes interface circuitry configured to receive a measurement signal indicative of a thermal conductivity of a gas atmosphere in the battery. Additionally, the apparatus includes processing circuitry configured to determine occurrence of the first venting based on the measurement signal.