Battery Module ID Assignment via Sequential Switch Isolation
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Solution Overview
Problem
Existing ID setting techniques in power storage systems require all switches to be turned off initially, limiting ID assignment to when power is on, and lack clarity on proper ID setting completion.
Innovation Solution
A power storage system with a master device and slave devices, where IDs are set by controlling switches and using differential communication to assign IDs sequentially, allowing for automatic ID assignment and termination setting at arbitrary timings without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If all switches are turned off initially for ID setting, then ID assignment can be performed sequentially, but ID setting can only be done when power is on and cannot be set at arbitrary timing
Solution Approach 1:
The system dynamically changes switch states based on operational phase. During normal operation, switches remain on for communication. During ID setting phase, switches are turned off sequentially to isolate slave devices for individual ID assignment, then restored to on state. This dynamic switching enables flexible timing while maintaining system functionality.
Solution Approach 2:
The master device preliminarily determines the switching sequence and controls slave devices in advance. Before ID setting begins, the master device prepares the switching schedule and systematically turns off switches according to a predetermined sequence, ensuring that ID assignment can proceed without interference from other slave devices.
2Reliability
If ID setting is completed within a predetermined time after power on, then the process is automated, but it is not clear whether ID setting is appropriately performed
Solution Approach 1:
The system implements feedback verification where the master device sends test communication signals to each slave device after ID assignment. Each slave device responds using its assigned ID, allowing the master device to verify that the ID was correctly received and stored. This confirmation feedback ensures reliable ID setting while maintaining automated operation within the predetermined time frame.
Solution Approach 2:
Each slave device autonomously receives and stores the ID signal sent by the master device, then automatically confirms receipt by responding to the master device. This self-service mechanism eliminates the need for manual verification while ensuring that ID setting is appropriately completed, maintaining both reliability and time efficiency.
3Productivity
If switches are turned off sequentially for ID assignment, then IDs can be assigned to multiple slave devices, but communication interruption occurs during the process
Solution Approach 1:
The ID assignment process is segmented into discrete sequential steps, with each slave device being individually addressed. The master device turns off switches in a predetermined sequence, assigning IDs to slave devices one at a time. This segmentation allows efficient batch ID assignment while isolating communication to only the currently active slave device, preventing communication conflicts.
Solution Approach 2:
The system employs periodic switching where communication is periodically established with each slave device in turn. The master device periodically turns switches on and off according to the predetermined sequence, creating rhythmic communication intervals that ensure each slave device receives its ID assignment without interference, maintaining overall system productivity.
Data Source
AI summary
IDs are appropriately assigned to a plurality of slave devices.A power storage system includes: a master device including a first controller, and a pair of first communication terminals; and a slave device including a second controller, a pair of second communication terminals, and a battery unit, wherein the slave device includes a pair of first switches series-connected to the pair of second communication terminals; the pair of first communication terminals and the pair of second communication terminals are connected to each other; when the slave device is notified of a predetermined communication signal from the master device, the second controller controls and turns the pair of first switch from on to off; and the first controller assigns an ID to the slave device.