Auxiliary Battery Monitoring for Independent Pack-Level Sensing
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Solution Overview
Problem
Existing battery monitoring systems primarily focus on individual cell-level measurements, lacking the capability to efficiently provide module-level and pack-level measurements independently of Cell Monitoring Devices (CMDs).
Innovation Solution
An auxiliary device is introduced to obtain module-level and pack-level measurements within an electronic battery system, transmitting these measurements to a centralized control unit via a near field communications bus, allowing for independent monitoring beyond individual cell levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If cell-level measurements are used via CMDs, then individual cell monitoring is achieved, but module-level and pack-level measurements cannot be obtained independently
Solution Approach 1:
The auxiliary device is designed to perform multiple monitoring functions simultaneously: it measures both module-level parameters (such as module voltage and temperature) and pack-level parameters (such as pack voltage and temperature), providing comprehensive monitoring coverage across different hierarchical levels of the battery system without requiring separate dedicated devices for each level
2Loss of information
If cell-level measurements are aggregated to obtain pack-level information, then more comprehensive information is available, but the monitoring becomes dependent on CMDs
Solution Approach 1:
The auxiliary device extracts and measures module-level and pack-level parameters directly using its own integrated sensors, rather than aggregating cell-level data from CMDs. This extraction approach provides independent monitoring capability at higher hierarchical levels, reducing dependency on CMDs while maintaining information completeness
3Reliability
If only cell monitoring is implemented, then individual cell safety is ensured, but thermal runaway and module-level abnormalities are harder to detect
Solution Approach 1:
The monitoring system is extended from the cell level to additional hierarchical dimensions (module level and pack level). The auxiliary device introduces new measurement dimensions by capturing parameters at higher levels of the battery hierarchy, enabling detection of thermal runaway and module-level abnormalities that are not visible at the cell level alone
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
The auxiliary device enables more comprehensive monitoring, facilitating the detection of abnormalities such as thermal runaway and allowing for improved control and management of battery systems at higher levels of granularity.
Implementation Method 1
transmitting, via a near field antenna of the auxiliary device, to a centralized control unit, the module-level and/or pack-level measurement via a near field communications bus
Data Source
AI summary
The present disclosure relates to an auxiliary device for monitoring a module and/or pack of an electric battery system. The auxiliary device provides module-level and/or pack-level measurements and may be flexibly placed anywhere within an electric battery monitoring system.