Cell Module Abnormality Detection Topology for Battery Pack Faults
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Solution Overview
Problem
Existing battery systems face issues where the loss of power to the battery status detection circuit due to an abnormality in a battery block can prevent proper detection of the battery status, leading to potential undetected abnormalities.
Innovation Solution
A battery pack design with multiple cell module units housed in a hermetically sealed pack case, each equipped with an abnormality detection means that uses the cell module as its power source, allowing for abnormality detection even if one unit loses power, utilizing a ring or star topology connection with a controller for comprehensive detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the battery status detection circuit uses the battery block as its power source, then the device complexity is reduced, but the reliability deteriorates because power loss prevents proper detection
Solution Approach 1:
The battery pack is divided into multiple battery blocks, each with its own independent abnormality detection circuit. This segmentation ensures that if one block fails, other blocks can continue to detect and report abnormalities, thus improving reliability while maintaining relatively simple individual circuit designs.
Solution Approach 2:
Each battery block is equipped with dedicated detection means that uses only the local battery block as its power source, rather than relying on a centralized power supply. This local quality approach ensures that the detection function in each block remains independent and reliable even when other blocks fail.
2Reliability
If multiple cell module units are used, then the reliability of abnormality detection is improved, but the device complexity increases
Solution Approach 1:
The battery pack is divided into multiple cell module units, with each unit containing battery blocks and dedicated abnormality detection means. This segmentation allows the system to achieve high detection reliability through redundancy while keeping each individual unit relatively simple in structure.
Solution Approach 2:
Each cell module unit is designed with universal functionality to detect abnormalities in its associated battery blocks. The detection means in each unit can independently monitor voltage, temperature, and other parameters, making the system highly reliable without requiring complex centralized control.
Data Source
AI summary
A battery pack includes a plurality of cell module units and a pack case housing the plurality of cell module units. Each of the cell module units includes a cell module including a plurality of battery cells, an abnormality detection means electrically connected to the cell module to use the cell module as its power source. The abnormality detecting means is configured to output a signal to an external controller when detecting an abnormality in an entirety of the pack case.