Battery Module ID Assignment for Electric Vehicle Management
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Solution Overview
Problem
Managing a battery unit composed of multiple modules in electric vehicles is cumbersome due to the difficulty in identifying aged modules, as existing methods require manual connection of sensors and voltage measurements, leading to inefficiencies and potential errors.
Innovation Solution
A battery management system with module status sensors connected in series via communication lines, assigning ID codes and transmitting data to a control unit, allowing for precise identification of abnormal modules without manual intervention and reducing component costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual voltage measurement methods are used to identify aged battery modules, then identification can be performed, but the procedure becomes cumbersome and time-consuming
Solution Approach 1:
The battery management system performs self-diagnosis by automatically measuring voltages of all battery modules and identifying aged modules without requiring manual intervention. The control unit autonomously executes the identification process, eliminating the need for workers to manually connect measuring wires and read voltage values.
Solution Approach 2:
The patent replaces manual mechanical operations (connecting measuring wires, reading voltmeters) with an automated electronic measurement and processing system. The control unit electronically measures voltages through connected wires and processes the data to identify aged modules, substituting human labor with automated electronic systems.
2Reliability
If individual battery modules are monitored, then aged modules can be identified, but the complexity of managing multiple modules increases
Solution Approach 1:
The patent combines individual battery modules into a unified battery unit with a single control unit that manages all modules. The control unit integrates voltage measurements from multiple modules and performs centralized analysis, simplifying the management structure while maintaining individual module monitoring capabilities.
Solution Approach 2:
The control unit serves multiple functions: it controls the battery unit operation, measures voltages of all battery modules, identifies aged modules, and provides warnings. This multi-functional design reduces the need for separate systems for each function, thereby reducing overall system complexity.
3Power
If battery modules are arranged in series, then voltage can be measured, but locating abnormal modules becomes difficult
Solution Approach 1:
The control unit receives voltage feedback from each battery module and compares measured voltages against expected values. When a module's voltage deviates from the normal range, the control unit identifies it as aged or abnormal, providing feedback-based localization without requiring physical inspection of each module.
Data Source
AI summary
The invention provides a battery management system which can reliably and easily manage a power unit of an electric vehicle. The power unit includes a plurality of battery modules. The battery management system includes: a power source for a motor, the power source being constituted by a plurality of battery modules having battery cells; battery module status sensors mounted on the battery modules on the one to one basis, detecting voltages and temperatures of the battery modules; and a control unit judging statuses of the battery modules on the basis of data detected by the battery module status sensors. The battery module status sensors are mutually connected in series by a communication line for transmitting numbering data, and each battery module status sensor assigning itself with an ID code on the basis of ID information received from an upstream battery module status sensor, and transmitting the ID information as well as the ID code to a downstream battery module status sensor. The control unit is connected to the battery module status sensors via the communication line for transmitting the numbering data and a communication line for transmitting various data except for the numbering data, and locates an abnormal battery module on the basis of detection information received via the communication line for transmitting the numbering data and the communication line for transmitting various data except for the numbering data.