Terminating Resistance Circuit for Stable Battery Module Communication
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Solution Overview
Problem
Existing methods for inserting terminating resistances in communication nodes are prone to errors such as incorrect placement or short-circuiting, which can disrupt communication in battery management systems.
Innovation Solution
A terminating resistance setting circuit that automatically generates and removes terminating resistances using control signals and switching elements, ensuring accurate and efficient insertion without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a resistor is directly inserted into the communication node to set terminating resistance, then the terminating resistance can be provided to avoid reflection phenomenon, but there is a possibility that the terminating resistance may be inserted into a wrong position or may not be properly inserted, such as short-circuited at both ends of the resistor
Solution Approach 1:
The system automatically determines which communication node should have terminating resistance and configures it without manual intervention. The controller autonomously identifies the end node and activates the resistance generation unit, eliminating the need for manual resistor insertion and preventing incorrect positioning or short-circuiting.
Solution Approach 2:
The patent replaces the mechanical/manual insertion of physical resistors with an electronic control system. The resistance generation unit uses electronic switching controlled by the controller to activate or deactivate terminating resistance, substituting manual mechanical operations with automated electronic control.
2Device complexity
If manual insertion method is used for terminating resistance, then the implementation is simple in terms of circuit design, but mistakes such as wrong position insertion or short-circuiting cannot be avoided
Solution Approach 1:
The controller receives communication signals and automatically determines whether the current node is an end node requiring terminating resistance. This feedback mechanism ensures that terminating resistance is activated only at the correct position, preventing wrong position insertion and short-circuiting while maintaining automated precision.
Solution Approach 2:
The system pre-configures the resistance generation unit and control logic before operation begins. The controller is programmed to automatically identify end nodes and activate terminating resistance in advance, ensuring correct positioning and preventing manufacturing errors before they can occur.
Data Source
AI summary
Disclosed is a terminating resistance setting circuit and a battery management system in a battery system including a plurality of battery modules, the battery management system including at least module controllers that respectively control the plurality of battery modules, in which the module controllers communicate with each other through a differential input mode, and each of a plurality of battery modules includes a terminating resistance setting circuit including a resistance generation unit connected between a pair of communication lines for differential input to generate a terminating resistance, a first control circuit that applies a first control signal to the resistance generation unit, and a second control circuit formed between the resistance generation unit and a reference potential and controlled to apply a voltage according to the reference potential to the resistance generation unit by a second control signal.