Curved Sensing Portion for Battery Pack Signal Integrity
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Solution Overview
Problem
Battery packs face issues with damage and dielectric breakdown of conductive lines and stress accumulation due to swelling of battery cells, which can lead to signal distortion and failure in transmitting state information effectively.
Innovation Solution
The battery pack design includes a flexible sensing portion with a curved connection portion embedded in an insulating film, featuring conductive lines and dummy patterns to absorb stress and prevent damage, allowing for deformation without signal disruption during cell swelling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the battery pack uses rigid conductive lines to transmit state information, then signal transmission is stable, but the conductive lines are damaged or experience dielectric breakdown when battery cells swell
Solution Approach 1:
The patent employs a flexible sensing portion with a curved connection structure that can deform when battery cells swell. This flexible design allows the conductive line to maintain signal transmission stability while accommodating cell expansion, preventing damage and dielectric breakdown through its ability to flex and adapt to changing spatial conditions.
Solution Approach 2:
The sensing portion is designed with dynamic characteristics, allowing it to change shape in response to battery cell swelling. The curved connection portion can deform dynamically to accommodate the expanding cells, maintaining both signal transmission stability and structural integrity under varying operational conditions.
2Device complexity
If the battery pack uses straight conductive lines for signal transmission, then the structure is simple, but stress accumulates in the conductive line or insulative film during cell swelling
Solution Approach 1:
The patent introduces curved portions in the connection structure that allow the sensing portion to deform smoothly during battery cell swelling. These curved sections act as stress-relief zones, distributing mechanical stress away from the conductive line and insulative film, thereby preventing stress accumulation while maintaining a relatively simple overall structure.
3Ease of manufacture
If the battery pack uses a rigid sensing portion, then manufacturing is easier, but damage occurs to the conductive line when cells swell
Solution Approach 1:
The sensing portion is designed with flexible characteristics that allow it to deform when battery cells swell, protecting the conductive line from damage. This flexible design maintains reliability while remaining compatible with standard manufacturing processes for flexible circuits and thin-film structures.
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 effectively prevents damage and dielectric breakdown of conductive lines, ensuring reliable transmission of state information by absorbing stress and accommodating swelling of battery cells, thus enhancing the structural integrity and operational reliability of the battery pack.
Implementation Method 1
the curved portions provided on both ends of the connection portion in the first direction may be deformed and lifted away from the main plain to face each other in response to swelling of the battery cells in the first direction
Data Source
AI summary
A battery pack includes battery cells arranged in a first direction, a wiring board collecting state information about the battery cells, and a sensing portion including an input port through which the state information about the battery cells is input, an output port coupled to the wiring board and through which the state information about the battery cells is output, and a connection portion between the input and output ports. The connection portion extends in a curved shape with portions spaced apart from each other in a second direction crossing the first direction. Damage or dielectric breakdown of a conductive line transmitting signals relating to the state information about the battery cells may be prevented, and accumulation of stress in the conductive line or an insulating film may be prevented, because the conductive line or the insulating film is flexibly deformed in response to swelling of the battery cells.