Segmented Battery Communication for Series Cell Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing battery management communication systems are costly due to the need for numerous connections and voltage isolation components, which complicates the management of series-connected battery cells.
Innovation Solution
A battery management communication system that splits series-connected battery cells into groups, using segment communication units to facilitate communication between a control unit and battery charge controllers, reducing the number of connections and employing power line communication to minimize noise and increase data rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional communication systems are used with numerous connections for series-connected battery cells, then complete communication coverage is achieved, but system cost and complexity increase significantly
Solution Approach 1:
The battery cell array is divided into multiple groups, with each group equipped with a dedicated communication unit. This segmentation allows each communication unit to handle only its local group, reducing the overall number of connections and isolation components needed while maintaining complete communication coverage across all battery cells.
Solution Approach 2:
Communication units serve as intermediary devices between the control unit and battery charge controllers. These intermediaries aggregate information from multiple battery cells and relay it to the control unit, reducing the direct connection requirements between the control unit and each individual battery cell.
2Reliability
If numerous voltage isolation components are used to ensure safety, then communication reliability is improved, but system cost and parasitic inductance increase
Solution Approach 1:
Voltage isolation is implemented at the segment level rather than requiring full-system isolation. Each communication unit provides isolation for its local battery cell group, reducing the total number of isolation components needed while maintaining safety and communication reliability across the entire system.
3Speed
If direct connections are made between control unit and each battery cell, then communication speed is maximized, but noise interference and parasitic capacitance increase
Solution Approach 1:
The system segments the battery cell array into groups, with each communication unit handling a specific group. This segmentation reduces the total cable length and number of connections required, thereby reducing parasitic capacitance and noise interference while maintaining high data rates through efficient local communication.
4Extent of automation
If traditional communication architecture is used, then complete control capability is achieved, but manufacturing flexibility and ease of assembly are reduced
Solution Approach 1:
The communication system is segmented into modular communication units that can be independently configured for different battery cell groups. This modularity allows flexible assembly and manufacturing configurations while maintaining complete control capability over all battery cells through the coordinated operation of multiple communication units.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A battery management communication system comprising: a control unit configured to receive information from each of a plurality of battery cells, and generate instructions to control the battery cells; a plurality of segment communication units comprising at least a first and a second segment communication unit; the first segment communication unit is configured to provide for communication between the control unit and a first cell group; and wherein the second segment communication unit is configured to provide for communication between the control unit and a second cell group; and a main communication unit configured to couple to the control unit and the plurality of segment communication units; wherein said information and instructions are routed through the main communication unit and appropriate segment communication unit.