Switching Board Vertical Through Holes Battery Temperature Measurement
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Solution Overview
Problem
Conventional switching boards for lithium secondary batteries face challenges in accurately measuring temperatures due to the heat transfer coefficient of thermal glue, leading to increased manufacturing costs and defect rates.
Innovation Solution
A switching board with vertical through holes and a heating pad on a printed circuit board, eliminating the need for thermal glue by directly transmitting heat from switching elements to a temperature detection element, ensuring accurate temperature measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If thermal glue is used to attach the temperature detection element to the switching elements, then the temperature measurement can be implemented, but the measurement precision is affected by the heat transfer coefficient of the thermal glue
Solution Approach 1:
The patent removes the thermal glue from the system by creating vertical through-holes that allow direct thermal contact between the temperature detection element and the switching elements. This extraction of the intermediary material (thermal glue) eliminates the heat transfer coefficient variability that was affecting measurement accuracy and reliability.
Solution Approach 2:
The vertical through-holes act as a new intermediary structure that provides a controlled thermal path between the switching elements and the temperature detection element. This structured intermediary (the through-hole cavity) replaces the problematic thermal glue while maintaining thermal coupling and eliminating measurement variability.
2Ease of manufacture
If thermal glue is used for temperature detection element attachment, then temperature sensing is enabled, but manufacturing costs and defect rates increase due to additional manufacturing processes
Solution Approach 1:
The patent combines the temperature detection element mounting process with the existing PCB fabrication process by forming vertical through-holes during standard PCB manufacturing. This merging of processes eliminates separate thermal glue application steps, reducing manufacturing complexity and associated defect rates while maintaining temperature sensing functionality.
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 of batteries, reducing defect rates and manufacturing costs while enhancing safety by eliminating the variability caused by heat transfer coefficients.
Implementation Method 1
a lower board having a heating pad at a position corresponding to the vertical through holes and the temperature detection element
Data Source
AI summary
Disclosed herein is a switching board having switching elements for temperature measurement mounted on a printed circuit board (PCB) having a circuit electrically connected to a unit cell constituting a battery module, the switching board including an upper board having a pair of switching elements, a temperature detection element, and one or more vertical through holes, the switching elements being electrically connected to the circuit, the temperature detection element and the vertical through holes being disposed between the switching elements, and a lower board having a heating pad at a position corresponding to the vertical through holes and the temperature detection element.