Battery Monitoring Clock Synchronization for Low-Cost Precision
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Solution Overview
Problem
The use of high-accuracy oscillators like crystal oscillators in battery monitoring devices increases costs, making it difficult to achieve accurate battery state measurement without incurring significant expense.
Innovation Solution
A battery monitoring system that utilizes a first clock generator and transceiver to generate a superimposed signal with battery monitoring information, allowing battery monitoring devices to synchronize their lower-accuracy oscillators with a reference clock signal, enabling accurate battery state measurement without the need for high-accuracy oscillators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If high-accuracy oscillators like crystal oscillators are used in battery monitoring devices, then measurement precision is improved, but device cost increases
Solution Approach 1:
A master clock unit is introduced as an intermediary component that generates a reference clock signal and distributes it to multiple battery monitoring devices. This master clock unit uses a high-accuracy crystal oscillator, while the individual monitoring devices can use lower-accuracy oscillators that are synchronized to the reference signal, thereby reducing overall system cost while maintaining measurement precision.
Solution Approach 2:
The clock generation function is segmented and centralized in a dedicated master clock unit, separate from the battery monitoring devices. This allows the high-accuracy oscillation function to be concentrated in one component rather than replicated in each monitoring device, reducing the total number of high-accuracy oscillators needed and lowering overall system cost.
2Adaptability or versatility
If multiple battery monitoring devices are connected in a network, then system versatility is improved, but connection complexity increases
Solution Approach 1:
The communication interface is designed with universal compatibility, allowing the same connection protocol and physical interface to be used across different connection topologies (ring, daisy-chain, multi-drop). This universal design enables the system to adapt to various connection configurations without requiring different hardware or protocols for each topology, simplifying the overall connection structure.
Data Source
AI summary
A battery monitoring system that monitors states of a plurality of batteries. The battery monitoring system includes a battery monitoring ECU and a plurality of battery monitoring devices. The battery monitoring ECU and the plurality of battery monitoring devices are connected to each other in any connection form of ring connection, daisy chain connection, or multi-drop connection.