Sensor Unit Elastic Biasing for Battery Temperature Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In battery devices, the distance variation between the temperature sensor and the secondary battery due to tolerance issues can lead to inaccurate temperature detection or sensor compression, resulting in decreased detection accuracy.
Innovation Solution
A sensor unit with a flexible band-like conductive path member, a sensor element, a mount, and an elastically deformable biasing member that ensures consistent contact with the detection object, reducing the likelihood of lifting and protecting the sensor from other components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the temperature sensor is fixed to the temperature detection plate using conventional methods, then the sensor can detect temperature, but the distance between the sensor and the secondary battery varies due to tolerance issues, leading to decreased detection accuracy
Solution Approach 1:
The biasing member applies elastic restoring force to the conductive path member, enabling dynamic adjustment of the sensor position to maintain consistent contact with the secondary battery surface despite tolerance variations in the temperature detection plate
Solution Approach 2:
The elastic restoring force from the biasing member changes the physical state of the conductive path member from rigid to elastically deformable, allowing the rear surface to maintain contact under varying distance conditions
2Measurement precision
If the temperature sensor is positioned closer to the secondary battery to improve detection accuracy, then measurement precision improves, but the sensor may be compressed between the temperature detection plate and the secondary battery
Solution Approach 1:
The mount acts as an intermediary structure that holds the sensor element at an optimal position, allowing close proximity for accurate detection while preventing direct compression between the detection plate and sensor
Solution Approach 2:
The biasing member provides pre-compression force that positions the sensor element close to the battery surface while the mount structure prevents excessive compression, cushioning the sensor from damage before it can occur
3Stability of the object's composition
If the conductive path member is made rigid to maintain stable connection, then electrical connection stability improves, but the member cannot adapt to distance variations and the sensor may lift from the detection object
Solution Approach 1:
The conductive path member is designed as a flexible band-like structure that can bend and deform elastically under the biasing force, maintaining both electrical connection stability and adaptive contact with the detection object surface
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 solution enhances detection accuracy by maintaining consistent contact between the sensor and the battery, reducing errors caused by distance variations and protecting the sensor from damage, while also simplifying production and storage by integrating the biasing member with the mount.
Implementation Method 1
a biasing member elastically deformably held in the mount and configured to bias the mount, toward the detection object by elastic restoring force
Implementation Method 2
a temperature sensor for detecting temperature of the detection object
Data Source
AI summary
A sensor unit disclosed herein is a temperature sensor unit to be attached to an energy storage device. The temperature sensor unit includes an FPC to be positioned on an energy storage device body, a temperature sensor connected to a detection line of the FPC, a housing disposed on the FPC and covering the temperature sensor, and a biasing member elastically and deformably held in the housing and configured to bias the lower housing of the housing toward the energy storage device body by elastic restoring force to bring the temperature sensor into contact with the energy storage device body with the FPC therebetween.