Battery Module Gas Detection Using an Optical Discharge Path
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Solution Overview
Problem
Temperature sensors in battery modules fail to detect gas generation unless the battery temperature rises, leading to safety risks due to undetected gas emissions.
Innovation Solution
A battery module design incorporating a discharge path with a light emitter and receiver system to detect gas emissions directly, allowing for early detection and alarm activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is used to detect battery status, then the battery temperature can be monitored, but gas generation cannot be detected unless the temperature rises
Solution Approach 1:
The patent replaces the thermal detection mechanism (temperature sensor) with an optical detection mechanism (light emitter and light receiver). The light emitter emits light through the battery casing, and the light receiver detects changes in light transmission caused by gas accumulation inside the battery, enabling direct gas detection without temperature rise.
Solution Approach 2:
The patent introduces light as an intermediary substance to detect gas generation. The light emitter and light receiver use light transmission through the battery casing as a mediator to indirectly detect the presence of gas inside the battery, avoiding the need for direct thermal contact with the gas.
2Reliability
If only temperature sensors are installed, then the monitoring system remains simple, but safety alarms cannot be issued for gas generation without temperature rise
Solution Approach 1:
The patent substitutes the conventional temperature-based detection system with an optical detection system consisting of a light emitter and light receiver. This replacement enables reliable gas detection through light transmission changes, providing accurate safety alarms without relying on temperature rise.
Solution Approach 2:
The optical detection system serves multiple functions: it can detect gas generation, monitor battery internal state, and provide safety alarms. The light emitter and receiver can be positioned to detect various conditions within the battery, making the system versatile for different detection needs.
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
Enhances safety by enabling timely detection and response to gas emissions, even when temperature sensors are ineffective, thereby preventing potential hazards.
Implementation Method 1
a light emitter that is provided on one end in the first direction of the battery stack and emits light to the discharge path; and a light receiver that is provided on another end in the first direction of the battery stack and receives the light emitted from the light emitter
Data Source
AI summary
Battery module includes: a battery stack in which a plurality of batteries provided with a valve that ejects gas are stacked in a first direction; a discharge path that discharges gas ejected from the valve in a second direction intersecting the first direction; light emitter that is provided on one end in the first direction of the battery stack and emits light to the discharge path; and light receiver that is provided on another end in the first direction of the battery stack and receives the light emitted from light emitter.