Battery Pressure Sensor Layout for Precise Swelling Detection
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Solution Overview
Problem
Existing technologies fail to accurately judge the swelling state and location of battery cells, which can lead to potential damage such as venting, fire, or explosion due to inadequate pressure measurement.
Innovation Solution
A battery pressure measuring sensor with variable resistor units positioned at specific locations on a substrate, changing resistance values based on applied pressure, and connected sensing lines to detect swelling states and locations, integrated into a battery pressure measuring apparatus with control units for precise judgment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If variable resistor units are provided at multiple locations on the substrate to measure pressure, then the measurement precision of battery swelling state is improved, but the device complexity increases
Solution Approach 1:
The substrate is divided into multiple regions with variable resistor units positioned at specific locations (first location with first resistance range, second location with second resistance range). Each variable resistor unit independently measures pressure at its location, enabling precise determination of swelling state and location without requiring a single complex measurement system.
Solution Approach 2:
Different variable resistor units are configured with different resistance ranges according to their locations on the substrate. The first variable resistor units at the first location have a first resistance range, while the second variable resistor units at the second location have a second resistance range. This local differentiation allows optimized measurement precision for different swelling scenarios.
2Measurement precision
If variable resistor units with different resistance ranges are used at different locations, then the accuracy of judging swelling location is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The variable resistor units are pre-configured with specific resistance ranges during manufacturing based on their intended locations. The first variable resistor units are manufactured with a first resistance range and the second variable resistor units with a second resistance range, allowing for standardized production processes that simplify assembly and reduce on-site calibration requirements.
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
The sensor accurately judges the swelling state and location of battery cells, preventing potential damage by detecting swelling risks and enabling timely intervention.
Implementation Method 1
configured to change a resistance value within a corresponding resistance range according to a pressure applied to each unit
Data Source
Figure 1~2
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Figure 5~6
AI summary
A battery pressure measuring sensor according to an embodiment of the present disclosure includes a substrate; a plurality of variable resistor units provided at a plurality of locations in consideration of a swelling characteristic of a battery on the substrate and configured to change a resistance value within a corresponding resistance range according to a pressure applied to each unit; and a plurality of sensing lines configured to be connected to the plurality of variable resistor units, respectively.