Battery BMS-BMM Communication Reset for Noise Fault Recovery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Communication errors between battery module managers (BMM) and battery management systems (BMS) due to noise signals are not effectively monitored, leading to continuous communication abnormalities in battery systems.
Innovation Solution
A battery system and monitoring method that includes a battery module manager (BMM) and a battery management system (BMS) to detect communication errors, transmit reset signals to resume communication, and implement a latch mode to manage noise interference, using a controller to control communication portions and manage state signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If communication monitoring is not implemented between BMM and BMS, then the system structure remains simple, but communication abnormalities persist continuously leading to system instability
Solution Approach 1:
The patent implements a feedback mechanism where the BMS monitors communication states from the BMM through dedicated signal lines. The BMM transmits communication state signals indicating whether communication is normal or abnormal, and the BMS receives these signals to determine system state and trigger reset operations when abnormalities are detected, creating a closed-loop monitoring system that improves communication reliability without requiring complex additional hardware
Solution Approach 2:
The patent introduces an intermediary communication monitoring mechanism where specific signal lines act as mediators between the BMM and BMS. These dedicated signal transmission lines carry communication state information, allowing the BMS to indirectly monitor communication health without directly interfering with the primary communication data flow, thus maintaining system simplicity while enabling reliable monitoring
2Reliability
If reset operation is performed immediately upon detecting communication error, then system stability is improved, but false resets due to noise signals increase
Solution Approach 1:
The patent implements preliminary monitoring action where the BMS continuously monitors communication state signals before determining system abnormalities. The system maintains a monitoring period during which communication states are tracked, and only after confirming persistent abnormalities beyond transient noise does the BMS trigger a reset operation. This preliminary monitoring phase filters out noise-induced false alarms while ensuring timely resets for genuine communication failures
Solution Approach 2:
The patent employs dynamic reset timing where the decision to perform reset operations is not static but adapts based on the duration and persistence of detected communication abnormalities. The BMS evaluates communication state signals over time, adjusting the reset trigger threshold dynamically to distinguish between transient noise signals and genuine communication failures, thereby optimizing reset timing to improve system stability without causing false resets
3Measurement precision
If additional monitoring components are added to detect communication errors, then error detection capability is improved, but manufacturing cost increases
Solution Approach 1:
The patent implements multi-functionality by enabling the BMS to perform both primary battery management functions and communication monitoring functions using the same existing hardware components. The BMS utilizes existing signal transmission lines and processing units to monitor communication states, eliminating the need for dedicated monitoring hardware and thereby improving error detection precision without increasing manufacturing costs
Solution Approach 2:
The patent applies self-service by designing a monitoring system where the existing BMM and BMS components monitor their own communication interactions. The BMM transmits its own communication state signals, and the BMS monitors these self-generated signals to detect communication errors. This self-monitoring approach eliminates the need for external or additional monitoring components, achieving precise error detection while maintaining cost-effectiveness
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A battery system includes a battery module that includes one or more battery cells and can be charged and discharged, a battery module manager (BMM) that can monitor a state of the battery module and control the battery module, and a battery management system (BMS) that can receive a signal from the battery module manager and transmit a reset signal that controls the battery module manager to resume communication within the battery system based on the received signal.