Flexible Circuit Board Structure for Battery Cell Expansion
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Solution Overview
Problem
Flexible circuit boards used in batteries tend to detach from battery cells over time, preventing the collection of voltage and temperature data due to expansion and displacement of battery cells, leading to potential damage and loss of data.
Innovation Solution
A flexible circuit board component with a groove portion penetrating the board body, forming a deformable part and connecting part, allowing the sampling terminal to move relative to the main body and adapt to external forces, thus preventing detachment and enabling continuous data collection. This design can be manufactured in a single step through stamping, ensuring simplicity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a flexible circuit board is used to connect to battery cells, then voltage and temperature data can be collected, but the flexible circuit board may detach from the battery cells after a period of use
Solution Approach 1:
The patent introduces a deformable part in the flexible circuit board that can dynamically adjust its shape and position in response to battery cell expansion and displacement. This dynamic adaptation allows the circuit board to maintain continuous contact with the battery cells throughout their service life, preventing detachment while preserving connection stability.
Solution Approach 2:
The flexible circuit board is designed with variable physical parameters including different flexibility zones, thickness variations, and elastic modulus gradients. These parameter changes enable different regions of the circuit board to respond differently to mechanical stresses, allowing the board to accommodate battery cell changes while maintaining reliable electrical connections over extended periods.
2Strength
If the sampling terminal is fixed relative to the board body, then structural stability is maintained, but damage occurs when external force is applied to the sampling terminal
Solution Approach 1:
The deformable part acts as a dynamic buffer between the fixed sampling terminal and the movable battery cell. When external force is applied, the deformable part absorbs and redistributes the stress through controlled deformation, preventing force concentration that would otherwise damage the sampling terminal or board body while maintaining overall structural stability.
Solution Approach 2:
The flexible circuit board incorporates pre-designed deformation zones and elastic elements that provide beforehand cushioning against external forces. These features are built into the structure to absorb and mitigate impact forces before they reach critical components like the sampling terminal, preventing damage while preserving structural integrity.
3Reliability
If the flexible circuit board is made rigid to prevent detachment, then connection stability improves, but adaptability to battery cell expansion decreases
Solution Approach 1:
The flexible circuit board employs local quality variations with different regions having distinct mechanical properties. The deformable part has high flexibility to adapt to battery cell expansion, while other portions maintain sufficient rigidity for structural support and stable electrical connections. This spatial differentiation of mechanical properties allows simultaneous achievement of connection stability and adaptability to expansion.
Solution Approach 2:
The circuit board is segmented into functional zones including rigid support areas, flexible deformation zones, and transition regions. This segmentation allows each zone to perform its specific function - the rigid portions maintain connection stability while the flexible segments provide adaptability to battery cell expansion and displacement throughout the service life.
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 flexible circuit board component effectively prevents separation from battery cells, allowing continuous collection of voltage and temperature data, enhancing battery stability and lifespan by accommodating expansion and displacement, and simplifying the manufacturing process.
Implementation Method 1
The deformable part is configured to undergo deformation so as to allow the connecting part to displace relative to the main body part
Data Source
AI summary
A flexible circuit board component includes a board body and a sampling terminal, wherein the sampling terminal is configured to collect the electrical data of the target component. The board body is provided thereon with a groove portion, wherein the groove portion penetrates the board body along a thickness direction of the board body so as to partition the board body into a main body part, a connecting part, and a deformable part. The connecting part is configured to connect the sampling terminal. The deformable part is connected to the main body part and the connecting part, and the deformable part is configured to undergo deformation so as to allow the connecting part to displace relative to the main body part.