Battery Pack Temperature Sensor Extending Between Cells
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery packs face challenges in accurately measuring the temperature of battery cells, leading to potential safety issues due to heat generation and fire risks, especially with high-reactivity lithium batteries, as conventional temperature measuring members may not provide reliable and precise temperature readings.
Innovation Solution
A battery pack design incorporating a temperature measuring member with a body portion and an extending portion, where the extending portion is inserted between battery cells to fix the temperature measuring head in place, providing precise temperature measurement and signal transmission to the protection circuit module, and featuring a tapered end and stopper for secure insertion and adjustable length, along with adhesive layers for secure attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional temperature measuring members are used, then the structure is simple, but the temperature measurement accuracy is insufficient
Solution Approach 1:
The temperature measuring member is divided into a body portion and an extending portion, where the extending portion is inserted between battery cells to position the temperature sensing element closer to the measurement target, thereby improving temperature measurement accuracy without significantly increasing overall device complexity
Solution Approach 2:
The extending portion acts as an intermediary element that bridges the gap between the body portion (containing the sensor) and the battery cells, enabling accurate temperature measurement by positioning the sensing element in close proximity to the battery cells while maintaining a simple overall structure
2Reliability
If the temperature measuring member is fixed securely, then the reliability is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The extending portion is designed to be flexible rather than rigid, allowing it to adapt to slight variations in battery cell positioning and spacing during assembly. This flexibility maintains reliable temperature measurement contact while simplifying the assembly process and improving ease of manufacture
3Measurement precision
If additional materials like thermal conductive silicon are used, then the temperature measurement accuracy is improved, but the device complexity and material requirements increase
Solution Approach 1:
The patent eliminates the need for additional thermal conductive materials by integrating the temperature sensing element directly into the extending portion that contacts the battery cells. This extraction of unnecessary materials simplifies the overall design while maintaining accurate temperature measurement capability
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
This design enhances the accuracy and reliability of temperature measurement, reducing the risk of heat-related safety issues and improving the overall safety and control of battery packs by ensuring precise temperature monitoring without the need for additional materials like thermal conductive silicon.
Implementation Method 1
a temperature measuring member attached to the protection circuit module and extending between, and in contact with, the two battery cells, the temperature measuring member measuring a temperature of one of the battery cells
Data Source
AI summary
A battery pack having at least two battery cells arranged parallel to each other, a protection circuit module adjacent to at least one of the battery cells, and a temperature measuring member attached to the protection circuit module and extending between, and in contact with, the two battery cells, the temperature measuring member measuring a temperature of one of the battery cells, the temperature measuring member being fixedly and removably attached to the at least one of the battery cells.