Multi-battery Pack System Automatic Master Role Reset
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Solution Overview
Problem
Multi-battery pack systems face challenges in controlling and setting battery packs as master or slave units, especially when the master battery pack is detached or malfunctions, leading to operational instability and inability to function normally.
Innovation Solution
A method for automatically resetting battery packs as master and slave units through communication protocols, where each battery pack determines its role based on communication line levels and messages, allowing stable operation even without a functioning master pack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the master battery pack is detached or fully discharged, then the system cannot normally operate, but this leads to operational instability and inability to control slave battery packs
Solution Approach 1:
The system performs preliminary actions by having each battery pack continuously monitor communication lines and prepare to take over as master before actually needing to do so. When the master battery pack is detached or discharged, the slave battery packs are already prepared to initiate master selection procedures, ensuring seamless transition without system failure.
Solution Approach 2:
The battery packs perform self-service by automatically selecting a new master from among themselves when the current master becomes unavailable. The slave battery packs autonomously monitor communication lines, detect master absence, and execute master selection without external intervention, maintaining system operation reliability and control capability.
2Adaptability or versatility
If the master battery pack position is fixed, then the system structure is simple, but the system cannot adapt when the master pack is absent or malfunctioning
Solution Approach 1:
The system implements dynamics by allowing the master battery pack role to dynamically change based on operational conditions. Instead of a fixed master position, any battery pack can become master through automatic selection procedures when needed, enabling the system to adapt to master pack absence or malfunction while maintaining manageable complexity through standardized communication protocols.
3Reliability
If automatic master selection is implemented, then the system can recover from master pack failure, but the communication and control mechanisms become more complex
Solution Approach 1:
The automatic master selection mechanism is segmented into distinct functional modules: communication line monitoring, master absence detection, candidate evaluation, and master selection execution. Each module performs a specific function independently, reducing overall system complexity while enabling comprehensive recovery capability from master pack failure through coordinated operation of these segmented components.
Data Source
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AI summary
Disclosed are a multi-battery pack system, a method for controlling battery packs, and a battery pack, in which plural battery packs provided in the multi-battery pack system can be set as a master battery pack and slave battery packs by themselves. The method for controlling the battery packs constructing the multi-battery pack system includes: a first step of checking if a communication line is maintained at a first level for a first desired amount of time when an activation signal or a message of setting a master battery pack is received; and a second step of outputting signals of a second level to the communication line for a second desired amount of time when the communication line is maintained at the first level for the first desired amount of time, and setting a battery pack as a master battery pack.