Thermally Conductive Laminate Sheet for Battery Pack Temperature Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In battery packs, temperature detection elements may not accurately detect the temperature of the battery cell due to heat being received at a position distant from the detection element, leading to inappropriate charging controls and potential safety issues.
Innovation Solution
A thermally conductive laminate sheet is used to wrap the battery cell and directly contact the temperature detection element, ensuring accurate temperature detection by transferring heat across the battery pack, even when heat is received at a distant position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the temperature detection element is mounted on the circuit board at a fixed position, then the device structure is simple and easy to manufacture, but the temperature detection accuracy deteriorates when heat is received at distant positions
Solution Approach 1:
A thermally conductive member is introduced as an intermediary between the battery cell and the temperature detection element. This member transfers heat from distant positions on the battery cell to the temperature detection element mounted on the circuit board, enabling accurate temperature detection without requiring the detection element to be positioned at multiple locations or in direct contact with heat-generating areas.
2Measurement precision
If the temperature detection element is positioned close to the heat source, then temperature detection accuracy improves, but the reliability of the detection system deteriorates due to direct heat exposure
Solution Approach 1:
The thermally conductive member serves as a heat transfer intermediary that allows the temperature detection element to indirectly measure battery cell temperature without being exposed to direct heat. The member conducts heat from the battery cell to the detection element, which remains positioned on the circuit board in a thermally stable environment, thus maintaining both detection accuracy and system reliability.
3Measurement precision
If multiple temperature detection elements are distributed throughout the battery pack, then temperature detection accuracy across all positions improves, but the manufacturing cost and device complexity increase
Solution Approach 1:
Instead of distributing multiple temperature detection elements throughout the battery pack, a single thermally conductive member is used to transfer heat from various positions on the battery cell to one temperature detection element mounted on the circuit board. This approach achieves comprehensive temperature monitoring while maintaining simple manufacturing processes and avoiding the complexity of multiple sensors.
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 configuration allows for precise temperature detection and appropriate charging control, enhancing safety and reducing battery deterioration by ensuring that temperature variations are accurately reflected to the protection circuit.
Implementation Method 1
A thermally conductive laminate sheet is used to wrap the battery cell and directly contact the temperature detection element, ensuring accurate temperature detection by transferring heat across the battery pack
Data Source
Figure 1~3
Figure 4~6
Figure 7~9
AI summary
A temperature detection element is allowed to more accurately detect a temperature of a battery pack. A battery pack includes: a battery cell; a temperature detection element; and a thermally conductive member transferring heat of the battery cell to the temperature detection element.