Sensor Unit Elastic Member for Battery Temperature Detection
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Solution Overview
Problem
The distance variation between the temperature sensor and the secondary battery in battery devices can lead to inaccurate temperature detection or sensor compression, reducing detection accuracy.
Innovation Solution
A sensor unit with a flexible conductive path member, a sensor element, and an elastic member that applies pressure to maintain contact with the detection object, ensuring accurate detection even with dimension tolerances, and includes a plate member for heat collection and protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the temperature sensor is fixed to the temperature detecting plate without additional pressing mechanisms, then the device structure is simple, but the detection accuracy decreases due to distance variation and lifting of the sensor from the battery surface
Solution Approach 1:
The elastic member transforms the static sensor mounting structure into a dynamic one that automatically adapts to distance variations. The elastic member can be compressed or extended based on the actual distance between the temperature detecting plate and the battery surface, maintaining optimal sensor contact without requiring complex adjustment mechanisms.
Solution Approach 2:
The elastic member changes its physical state (compression/extension) based on distance variations, allowing the sensor to maintain consistent contact pressure with the battery surface despite dimensional tolerances in the temperature detecting plate or battery casing.
2Measurement precision
If the temperature sensor is positioned closer to the battery surface to improve detection accuracy, then the detection accuracy improves, but the sensor may be compressed and damaged due to dimensional tolerances
Solution Approach 1:
The elastic member acts as a cushioning element that absorbs excessive compression forces before they reach the temperature sensor. When the temperature detecting plate is positioned too close to the battery surface due to dimensional tolerances, the elastic member compresses to provide mechanical compliance, protecting the sensor from damage while maintaining detection accuracy.
3Measurement precision
If the back surface side portion of the conductive path member is pressed toward the detection object with resilient force, then the detection accuracy is maintained, but the elastic member requires additional space within the housing section
Solution Approach 1:
The elastic member is designed as a thin, flexible component that can be integrated into the existing housing section without requiring significant additional space. The flexible nature of the elastic member allows it to conform to the available space while still providing the necessary pressing force to maintain sensor contact with the detection object.
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 unit maintains detection accuracy and prevents damage by ensuring consistent contact and heat transfer, improving operability and reducing the risk of compression or lifting due to tolerances.
Implementation Method 1
an elastic member disposed on a surface of the conductive path member so as to be elastically deformable. The elastic member is to be elastically compressed within the housing section to press a back surface side portion of the conductive path member toward the detection object by resilient force
Implementation Method 2
The plate member may be a metal plate having high thermal conductivity. According to such a configuration, the plate member exerts heat collecting effects of collecting heat of the detection object and the temperature of the detection object can be detected by the sensor element stably
Data Source
AI summary
A sensor unit disclosed herein is a sensor unit that is to be mounted in a housing section included in a device, and the sensor unit includes a FPC including a detection line and having flexibility, a temperature sensor connected to a connection portion of the detection line on a surface of the FPC, and an elastic member disposed on the surface of the FPC so as to be elastically deformable. The elastic member is to be elastically compressed within the housing section to press a first plate member mounted on a back surface of the FPC toward the device by a resilient force.