Battery Cell Temperature Sensor Mounting for Accurate Thermal Sensing
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Solution Overview
Problem
Existing temperature monitoring systems for battery cells often inaccurately measure cell temperature due to discrepancies between the temperature of the connecting plate and the actual cell temperature, leading to a lack of precise understanding of the cell's operating status.
Innovation Solution
A battery module design that includes a temperature sensor fixed tightly to the battery cell using a fixing component with a rotation portion screwed into a fixing portion, ensuring direct temperature measurement by the sensor, protected within an inner cavity and facilitated by a mating slot and bulges to reduce friction and tilting, and enhanced by a thermally conductive piece and elastic gasket for improved contact reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is connected onto a connecting plate through a metal sheet, then the temperature of the connecting plate can be measured, but the temperature measurement accuracy of the battery cell deteriorates because the connecting plate temperature differs sharply from the battery cell temperature
Solution Approach 1:
The patent introduces a fixing component as an intermediary structure between the temperature sensor and the battery cell. This fixing component includes a fixing portion that contacts the battery cell and a rotation portion that presses the temperature sensor against the fixing portion, creating a direct thermal contact path that bypasses the connecting plate and accurately reflects the battery cell temperature.
Solution Approach 2:
The patent extracts the temperature sensor from the connecting plate environment and relocates it to directly contact the battery cell through the fixing component. This separation removes the sensor from the harmful thermal environment of the connecting plate, allowing accurate measurement of the battery cell temperature without interference from the connecting plate's thermal characteristics.
2Measurement precision
If the temperature sensor is directly pressed against the battery cell, then temperature measurement accuracy improves, but the temperature sensor becomes vulnerable to collision and scratching
Solution Approach 1:
The patent embeds the temperature sensor within the fixing component structure. The fixing portion provides a protective housing that encloses the sensor, allowing the sensor to maintain direct thermal contact with the battery cell while being shielded from external mechanical damage by the surrounding fixing component structure.
Solution Approach 2:
The fixing component is designed with a structure that beforehand protects the temperature sensor from potential mechanical damage. The fixing portion and rotation portion create a controlled pressing mechanism that ensures consistent thermal contact while preventing excessive force or misalignment that could damage the sensor during installation or operation.
3Measurement precision
If a fixing component with rotation portion is used to press the temperature sensor tightly, then temperature collection accuracy improves, but the device complexity increases
Solution Approach 1:
The patent divides the fixing component into distinct functional segments: a fixing portion that provides structural support and thermal contact with the battery cell, and a rotation portion that applies pressing force to the temperature sensor. This segmentation allows each part to be optimized for its specific function while maintaining overall simplicity through modular design.
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 the accuracy of temperature collection by ensuring the sensor fits snugly with the cell, protecting it from damage, and maintaining precise measurements despite vibrations, thus improving the reliability and precision of temperature monitoring.
Implementation Method 1
the temperature sensor is pressed against the battery cell tightly... the temperature sensor directly collects the temperature of the battery cell
Data Source
AI summary
This application provides a battery module and a device, and relates to the technical field of batteries. The battery module includes a battery cell, a circuit board, a temperature sensor, and a fixing component. The circuit board is disposed at a top of the battery cell and electrically connected to the battery cell. The temperature sensor is disposed at the top of the battery cell and configured to measure a temperature of the battery cell. The temperature sensor is electrically connected to the circuit board. The fixing component includes a fixing portion and a rotation portion. The fixing portion is fixed to the top of the battery cell. The rotation portion is screwed into the fixing portion so that the temperature sensor is pressed against the battery cell tightly. This application can improve accuracy of temperature collection of the battery cell.