Secondary Battery Circuit Board With Thinned Installation Part
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Solution Overview
Problem
The existing secondary battery designs face complexity in installing and effectively sensing temperature due to the connection of conductive tabs, which complicates the electrical insulation process and heat transfer, potentially leading to malfunction or damage from elevated temperatures.
Innovation Solution
A secondary battery design incorporating a circuit board with a temperature device installed on a thinner installation part, featuring through holes or recesses with thermal conductive materials, which electrically connects conductive tabs to sense and manage temperature, ensuring efficient heat transfer and electrical insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive tabs are connected to both ends of a temperature device, then electrical connection is achieved, but the installation process becomes complicated and electrical insulating is required
Solution Approach 1:
The patent combines the temperature sensing function and electrical connection function into a single integrated temperature device. The temperature device has a single conductive tab that serves both as a temperature sensor mounting point and as an electrical connection element, eliminating the need for separate conductive tabs and simplifying the installation process while maintaining reliable electrical connection.
2Temperature
If a standard thickness circuit board is used, then structural strength is maintained, but heat transfer efficiency to the temperature device is reduced
Solution Approach 1:
The circuit board features a localized thinning at the installation part where the temperature device is mounted. This local quality change allows efficient heat transfer from the battery cell to the temperature device at the contact point, while the rest of the circuit board maintains its standard thickness and structural strength. The thinning is precisely controlled to achieve optimal thermal contact without compromising overall board integrity.
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 simplifies the installation of the temperature device, enhances temperature sensing, and effectively manages heat transfer, preventing battery malfunction by cutting the electric current path when the temperature exceeds a predetermined level, thus protecting the battery from damage.
Implementation Method 1
The secondary battery may further include a thermal conductive material layer disposed in the recess or is disposed on inner surfaces of the through holes
Data Source
AI summary
Disclosed are a secondary battery and a circuit board assembly suitable for the secondary battery. The secondary battery includes a bare cell including an electrode terminal, a circuit board electrically connected to the electrode terminal and arranged on a top surface of the bare cell. The circuit board includes an installation part having a smaller thickness than rest of the circuit board. The secondary battery further includes a temperature device installed on the installation part of the circuit board to sense temperature variation of the bare cell.