Battery Management Unit Dynamic Measurement Resolution
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Solution Overview
Problem
Existing battery management systems face limitations in transmitting measurement data due to restricted bandwidth in bus systems, which restricts measurement frequency and accuracy, especially when high data resolution is required, and are further constrained by additional communication signals.
Innovation Solution
A method that dynamically adjusts measurement data resolution and frequency in multiple cycles, allowing for flexible operation modes to optimize data transmission, including increasing frequency with lower resolution and reducing frequency with higher resolution, to accommodate varying measurement needs and create space for control signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If measurement data is transmitted at high measurement data resolution, then measurement accuracy is improved, but the available bandwidth for transmission is reduced
Solution Approach 1:
The patent implements dynamic adjustment of measurement data resolution and measurement frequency based on operational conditions. The control device can switch between different measurement modes (first mode with higher resolution/lower frequency, second mode with lower resolution/higher frequency) to optimize the trade-off between measurement accuracy and transmission capacity according to real-time requirements.
Solution Approach 2:
The system changes key parameters (measurement data resolution and measurement frequency) dynamically according to operational needs. By adjusting these parameters between different predetermined values, the system adapts to varying bandwidth availability and measurement requirements, resolving the contradiction between maintaining high resolution and ensuring sufficient transmission capacity.
2Productivity
If measurement frequency is increased to transmit more data, then data transmission capacity is improved, but measurement data resolution must be reduced
Solution Approach 1:
The system dynamically switches between measurement modes where the first mode uses higher resolution with lower frequency, while the second mode uses lower resolution with higher frequency. This dynamic adaptation allows the system to prioritize either accuracy or transmission speed based on current operational requirements and bandwidth availability.
Solution Approach 2:
The control device adjusts the parameters of measurement data resolution and measurement frequency between predetermined values. By changing these parameters dynamically, the system can increase transmission capacity when needed while accepting reduced resolution, or maintain high resolution when accuracy is prioritized over transmission speed.
3Adaptability or versatility
If bus system bandwidth is shared with other subscribers for control signals, then system versatility is improved, but available bandwidth for measurement data is reduced
Solution Approach 1:
The measurement devices dynamically adapt their transmission characteristics based on the presence and requirements of other bus subscribers. When control signals are present, the system adjusts measurement frequency and resolution to accommodate shared bandwidth, ensuring both measurement data and control signals can coexist on the same bus system.
Solution Approach 2:
The system uses periodic measurement cycles with variable characteristics. By implementing measurement cycles at different frequencies and resolutions, the system creates temporal patterns that accommodate intermittent control signal transmissions, allowing both measurement data and control commands to share the bus effectively.
Data Source
AI summary
The disclosure provides a method for transmitting data between a control device and at least one measurement device via a bus system. The method includes recording first measurement data relating to at least one measurement variable with the at least one measurement device with a first measurement data resolution within a first measurement cycle, transmitting the recorded first measurement data to the bus system at a first measurement frequency within the first measurement cycle. The method further includes recording second measurement data relating to the at least one measurement variable with the at least one measurement device with a second measurement data resolution within a second measurement cycle. The second measurement data resolution is less than the first measurement data resolution. The method also includes transmitting the recorded second measurement data to the bus system at a second measurement frequency within the second measurement cycle.