Secondary Battery Cover With Detachable Pressure Sensing
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Solution Overview
Problem
Secondary batteries face challenges in monitoring internal pressure, which is crucial for detecting conditions such as overcharging, overdischarging, and high temperature that can lead to gas generation and pressure increases.
Innovation Solution
A secondary battery design that includes a pressure measurement part detachably installed on the cover part of the battery case, featuring a sensor module and a housing with a sealing member to measure and monitor internal pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure measurement part is permanently integrated into the battery case, then measurement reliability is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The pressure measurement part is divided into a separate detachable module that can be independently installed on the battery case, rather than being permanently integrated. This segmentation allows the measurement function to be added without complicating the overall battery structure, while still providing reliable pressure monitoring when the module is attached.
Solution Approach 2:
The pressure measurement part is designed with detachable connection features (screw threads, sealing members) that allow it to be dynamically installed or removed from the battery case. This dynamic configuration enables the system to transition between states with and without measurement capability, reducing permanent structural complexity while maintaining measurement reliability when needed.
2Reliability
If the pressure measurement part is permanently integrated, then measurement consistency is improved, but ease of repair and replacement deteriorates
Solution Approach 1:
By segmenting the pressure measurement part into a separate detachable module, the system enables easy removal and replacement of the measurement component without affecting the battery case or other components. The module can be independently serviced, repaired, or replaced while maintaining measurement consistency through standardized connection interfaces.
Solution Approach 2:
The detachable design allows the pressure measurement part to be easily removed (discarded from the system) when it needs repair or replacement, and then a restored or new module can be reinstalled. This facilitates maintenance operations while preserving measurement consistency through standardized reinstallation procedures.
3Measurement precision
If sealing members are used to prevent fluid movement, then measurement accuracy is improved, but corrosion resistance requirements increase
Solution Approach 1:
The sealing member acts as an intermediary component between the pressure measurement part and the battery case, creating a fluid-tight barrier that ensures accurate pressure measurements. By positioning the sealing member at the interface, it effectively prevents electrolyte leakage while the detachable design allows for easy replacement if corrosion occurs, maintaining both measurement precision and system reliability.
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
Enables real-time pressure monitoring within the battery, enhancing safety by detecting abnormal pressure increases and preventing potential accidents, while also facilitating easy maintenance and reuse of the pressure measurement part.
Implementation Method 1
a pressure sensor configured to measure a pressure of fluid moving through the connection protrusion
Implementation Method 2
a ring-shaped sealing member at a lower side of the housing facing the cover part to block movement of a fluid
Data Source
AI summary
A secondary battery includes: an electrode assembly including a first electrode plate, a separator, and a second electrode plate; a case in which the electrode assembly is accommodated; a cover part closing an open upper side of the case; and a pressure measurement part detachably installed on the cover part and configured to measure a pressure inside the case.