Wireless Cell Controller Slot Segmentation for Battery SOC Accuracy
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Solution Overview
Problem
Existing wireless communication methods for battery systems face challenges in achieving precise measurements and high communication speed simultaneously, as longer slots required for accurate measurements reduce communication speed, and independent measurement timings by cell controllers lead to inconsistent results and degraded calculation accuracy of state of charge (SOC) and state of health (SOH).
Innovation Solution
A communication device that wirelessly transmits measurement results during one time slot and starts measurements in a different slot, allowing for precise measurements without prolonging the communication slot, thus enabling high communication speed and improving calculation accuracy by synchronizing measurement timings across cell controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the slot is lengthened to allow precise measurement and complete measurement-reception operations, then measurement precision is improved, but communication speed is degraded
Solution Approach 1:
The patent divides the communication process into two separate time slots: one slot dedicated to measurement operations and another slot dedicated to data transmission. This segmentation allows the measurement phase to take sufficient time for high precision while the communication phase can operate at high speed, resolving the contradiction between measurement precision and communication speed.
2Device complexity
If each cell controller measures independently in their allocated slot, then device complexity is reduced, but measurement precision is degraded due to inconsistent measurement timings
Solution Approach 1:
The patent implements periodic measurement actions where all cell controllers perform measurements in synchronized time slots. This periodic synchronization ensures that measurements are taken at consistent time points across all controllers, improving measurement precision for SOC and SOH calculations while maintaining relatively simple device architecture.
Data Source
AI summary
An object of the present invention is to provide a wireless communication technique which can measure a physical state of the measurement object with high accuracy and can transmit the measurement result rapidly. The communication device according to the present invention wirelessly transmits the measurement result during a first time slot, and starts measurement during a second time slot which differs from the first time slot (see FIG. 3).