Battery Cell Sensor Mounting Hole Layout for Higher Energy Density
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Solution Overview
Problem
Existing battery cells face challenges in maximizing volumetric energy density due to limited space within the shell, which hinders the accommodation of additional components and effective management of the operating state, particularly when detection sensors are placed inside, occupying valuable space.
Innovation Solution
The battery cell design incorporates a detection sensor with an encapsulation housing that is partially inserted into a mounting hole, reducing its space occupation within the shell, while being partially outside, thus increasing the spacing distance from the electrode assembly to minimize corrosion and short-circuit risks, and includes features like an isolating cover and through-holes for efficient environment sampling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the detection sensor is placed inside the shell, then the environment monitoring function is achieved, but the space occupation inside the shell increases, reducing the volumetric energy density
Solution Approach 1:
The detection sensor is positioned partially outside the shell by utilizing the mounting hole, transitioning from a fully internal placement to a partial external placement. This dimensional change allows the sensor to maintain its monitoring function while reducing the space it occupies within the shell, thereby improving volumetric energy density without sacrificing reliability.
2Measurement precision
If the detection sensor is placed closer to the electrode assembly to improve monitoring efficiency, then the sampling accuracy is enhanced, but the risk of corrosion and short-circuit increases
Solution Approach 1:
The mounting hole structure serves as an intermediary between the detection sensor and the electrode assembly. By positioning the sensor partially outside the shell and utilizing the mounting hole as a transition zone, the sensor can sample the internal environment effectively while maintaining a safe distance from the electrode assembly, thus reducing corrosion and short-circuit risks.
3Volume of moving object
If the overall volume of the battery cell is reduced to improve energy density, then the space utilization is enhanced, but the space for accommodating detection sensors and other components is reduced
Solution Approach 1:
The detection sensor is extracted from the internal space of the shell and positioned partially outside through the mounting hole. This extraction frees up valuable internal space that can be used for accommodating the electrode assembly and other components, allowing the battery cell to maintain compact dimensions while still including necessary monitoring functionality.
Data Source
AI summary
A battery cell includes a shell, an electrode assembly and a detection sensor. The shell includes a wall portion, the wall portion being provided with a mounting hole in communication with inside and outside of the shell. The electrode assembly is accommodated inside the shell. The detection sensor includes a sampling module and an encapsulation housing configured to encapsulate the sampling module. At least part of the encapsulation housing is inserted into the mounting hole and blocks the mounting hole. The sampling module is configured to sample an environment inside the shell.