Series Battery Tab Voltage Sensing for Cell-Level Abnormality Detection
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Solution Overview
Problem
Existing battery designs with multiple electrode bodies connected in series face difficulties in detecting the voltage of each individual electrode body, making it challenging to identify abnormalities or voltage differences between them.
Innovation Solution
Incorporating a voltage detector that connects to the electrode tabs of multiple electrode bodies, allowing for the detection of each electrode body's voltage by calculating potential differences, thereby enabling early detection of abnormalities and improving safety and cycle performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple electrode bodies are connected in series within a battery, then the battery voltage can be easily detected at the terminals, but the voltage of each individual electrode body becomes difficult to detect
Solution Approach 1:
The voltage detector is divided into multiple independent detection units, with each unit responsible for detecting the voltage of a specific electrode body. This segmentation allows individual electrode voltages to be measured separately while maintaining the series connection structure, resolving the contradiction between easy terminal detection and individual electrode detection.
Solution Approach 2:
An intermediary detection structure is introduced that connects to the electrode tabs through the exterior body wall. This intermediary mechanism enables voltage detection at the electrode body level without disrupting the series connection architecture, allowing individual voltage measurement while maintaining system simplicity.
2Reliability
If electrode bodies are connected in series within an exterior body, then the battery structure is compact, but abnormal voltage conditions in individual electrode bodies cannot be identified
Solution Approach 1:
The detection system is segmented into multiple independent detection channels, each monitoring a specific electrode body. This enables individual electrode voltage information to be captured and analyzed, allowing early detection of abnormal conditions in any single electrode body while maintaining the compact series connection structure.
Solution Approach 2:
The voltage detector provides continuous feedback on the voltage status of each electrode body individually. This feedback mechanism enables real-time monitoring and early warning of abnormal voltage conditions, improving battery safety without requiring changes to the compact series connection architecture.
3Measurement precision
If voltage detectors are added to detect individual electrode bodies, then voltage monitoring capability is improved, but the device structure becomes more complex
Solution Approach 1:
The voltage detector is designed with multi-functionality, serving both as a structural component of the exterior body and as a detection device. The detector integrates the functions of structural support and voltage measurement, eliminating the need for separate detection components and reducing overall device complexity while achieving individual electrode voltage monitoring.
Solution Approach 2:
The detection function is merged with the exterior body structure. The voltage detector is integrated into the exterior body wall, combining the structural function of the exterior body with the detection function. This merging reduces the number of separate components and simplifies the overall device structure while enabling individual electrode voltage detection.
Data Source
AI summary
A battery including electrode bodies connected in series, wherein the battery is capable of detecting the voltage of each electrode body. The battery includes electrode bodies, and an exterior body including an inner region configured to house the electrode bodies, and the battery includes at least a first electrode body and a second electrode body, the first electrode body includes an electrode tab P, the second electrode body includes an electrode tab R having an opposite polarity to the electrode tab P, the electrode tab P and the electrode tab R are connected in the inner region, the battery includes a voltage detector placed so as to extend from the inner region to an outer region of the exterior body, and as the voltage detector, the battery includes a voltage detector α connected to a connecting portion of the electrode tab P and the electrode tab R.