Battery Module Timing Synchronization via Relay Differential Correction
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Solution Overview
Problem
In battery control systems with a hierarchical structure, there is a time difference in battery information acquisition among battery modules due to one-on-one communication between relays and modules, leading to inconsistent measurement times, especially when different types or statuses of batteries are involved, affecting accurate charging and discharging control.
Innovation Solution
A relay calculates measurement time differential information to correct the measurement time of each battery module, ensuring all modules acquire battery information at the same time by adjusting their measurement start times based on received Δt values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If one-on-one communication between relay and battery modules is used, then communication simplicity is maintained, but measurement time synchronization deteriorates
Solution Approach 1:
The relay transmits measurement start timing information to each battery module in advance before the actual measurement begins. Each battery module uses this pre-transmitted timing information to synchronize its measurement start time, ensuring all modules measure simultaneously without requiring complex real-time coordination during the measurement process itself.
2Adaptability or versatility
If hierarchical control structure is adopted, then system scalability is improved, but measurement time differential increases
Solution Approach 1:
The relay collects measurement timing information from each battery module and uses this feedback to calculate and transmit corrected measurement start timing information back to the modules. This feedback loop enables the hierarchical structure to achieve synchronized measurements by continuously monitoring and adjusting timing based on actual module response times.
Data Source
Figure 1
Figure 2(a)~2(b)
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AI summary
A relay (20) receives a battery information acquisition time from each battery module (10) and calculates measurement time differential information Δt, that is, a time difference between the battery information acquisition time as a reference and the battery information acquisition time of another battery module (10) among the received battery information acquisition times, for each battery module (10). A measurement time correction unit (115) of each battery module (10) corrects a measurement time by the measurement time differential information Δt, using the measurement time differential information Δt received from the relay (20) to adjust the battery information acquisition time of each battery module (10) to the same time.