Series Battery Tab Layout for Individual Electrode Voltage Detection
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Solution Overview
Problem
It is difficult to detect the voltage of each electrode body in a battery assembly where multiple electrode bodies are connected in series, making it challenging to identify abnormalities or differences in voltage between them.
Innovation Solution
Incorporating a voltage detector that extends from the inner region to the outer region of the battery, connected to the electrode tabs of multiple electrode bodies, allowing for the detection of each electrode body's voltage by calculating potential differences between the detector and terminal potentials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple electrode bodies are connected in series within a battery assembly, 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 battery assembly is segmented into multiple electrode bodies (first electrode body, second electrode body, etc.), each with its own voltage detection path. The voltage detector is divided into multiple detection sections, with each section responsible for detecting the voltage of a specific electrode body by connecting to its corresponding electrode tabs. This segmentation allows individual voltage measurement without requiring complex external measurement systems.
Solution Approach 2:
Electrode tabs (first electrode tab, second electrode tab, third electrode tab, fourth electrode tab) serve as intermediaries between the electrode bodies and the voltage detector. These tabs extend from the inner region where electrode bodies are housed to the outer region where they can be accessed by the voltage detector, facilitating voltage detection without direct access to the electrode bodies themselves.
2Power
If electrode bodies are connected in series to increase voltage output, then power delivery is improved, but the ability to monitor individual electrode health deteriorates
Solution Approach 1:
The series-connected electrode bodies are segmented into individually detectable units. Each electrode body is assigned a specific detection section of the voltage detector, allowing the system to maintain high power output through series connection while simultaneously monitoring the voltage of each individual electrode body for health assessment and anomaly detection.
Solution Approach 2:
The voltage detector provides feedback on the voltage of each electrode body to the control board. This feedback mechanism enables real-time monitoring of individual electrode health, allowing the system to detect abnormalities such as overcharging, undercharging, or cell degradation in specific electrode bodies while maintaining the overall series connection for power delivery.
3Measurement precision
If a voltage detector is placed inside the battery assembly to access internal electrode connections, then individual voltage detection is enabled, but the device structure becomes more complex
Solution Approach 1:
The electrode tabs serve multiple functions: they provide electrical connection for series bonding between electrode bodies, serve as current collectors, and act as access points for voltage detection. This multi-functionality eliminates the need for separate detection structures, as the same tabs used for electrical connection also enable voltage measurement, thereby reducing overall device complexity.
Solution Approach 2:
The voltage detector is positioned in the outer region of the battery assembly, using electrode tabs as intermediaries to access the internal electrode connections. This arrangement avoids placing the voltage detector inside the crowded inner region, simplifying the internal structure while still enabling individual electrode voltage measurement through the intermediary tabs that extend to the accessible outer region.
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.