Dual-Broadcast Battery Cell Control for Accurate Voltage Verification
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Solution Overview
Problem
Existing battery arrangements in electric and hybrid electric vehicles face limitations in controlling battery performance due to complex requirements such as charging cycles, electrical power output, and capacity, which affect the efficiency and accuracy of battery management.
Innovation Solution
A battery arrangement comprising multiple strings of battery cells connected in series, each with a battery cell controller and a master node that broadcasts control information to slave nodes, allowing for improved cell voltage verification and overall control accuracy through distributed feedback control and synchronized power electronics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional battery control system with centralized control is used, then the system structure is simple, but the control accuracy and reliability of battery cell voltage verification deteriorates
Solution Approach 1:
The battery control system is segmented into multiple independent battery cell controllers (slave nodes), each responsible for monitoring and controlling specific battery cells. This segmentation allows distributed feedback control where each controller independently verifies cell voltage, improving measurement precision while distributing system complexity across multiple modular units rather than concentrating it in a single centralized controller
2Adaptability or versatility
If battery cell controllers are connected between cell terminals as in conventional technologies, then the connection is simple, but the ability to disconnect individual cells without affecting overall battery performance deteriorates
Solution Approach 1:
The battery cell controller acts as an intermediary device connected between battery cells through AC terminals rather than direct terminal connections. This intermediary position enables the controller to independently manage power flow and disconnect individual cells from the battery arrangement without disrupting the overall system operation, providing adaptability while maintaining system integrity
3Measurement precision
If a master node broadcasts control information to multiple slave nodes, then the control accuracy and synchronization is improved, but the communication system complexity increases
Solution Approach 1:
The communication network implements a feedback mechanism where slave nodes send status information back to the master node, which then broadcasts updated control information to all slave nodes. This feedback loop ensures synchronized and accurate control across all battery cell controllers, improving control precision while managing communication complexity through structured information exchange protocols
Data Source
AI summary
The present disclosure relates to a battery arrangement. The battery arrangement including a plurality of battery cells, a plurality of battery cell controllers forming a plurality of slave nodes, wherein each battery cell controller of the battery cell controllers is connected to at least one terminal associated with at least one battery cell of the battery cells and includes at least a power electronics arrangement for selectively connecting or disconnecting with the at least one terminal. The battery cell arrangement further includes a master node broadcasting a control information message to the slave nodes, wherein the control information message enables each of the slave nodes to generate an electrical signal with one or more characteristics based on the control information message, by controlling its power electronics arrangement.