Wireless Battery Module Communication for EV Power Management
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Solution Overview
Problem
Existing electric vehicle battery management systems face challenges in efficient monitoring and management of multiple battery modules, particularly due to the complexity of wiring and potential communication losses during module replacement, which can affect vehicle stability.
Innovation Solution
A power management system for electric vehicles that employs a master-slave wireless communication architecture, utilizing a single or multiple wireless frequency channels for data communication between an energy management system and battery management systems, allowing for efficient monitoring and management of battery modules with reduced wiring and improved stability by using unique addresses for each module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired communication is used between energy management system and battery management systems, then data communication can be established, but wiring complexity increases and communication losses may occur during module replacement
Solution Approach 1:
The patent replaces the mechanical wiring system with a wireless communication system. The energy management system communicates with multiple battery management systems wirelessly through wireless transmission modules, eliminating the need for physical wired connections between these components while maintaining reliable data communication.
Solution Approach 2:
The patent introduces wireless transmission modules as intermediary components that facilitate communication between the energy management system and battery management systems. These modules act as mediators that transmit data wirelessly, avoiding the need for direct wired connections and the associated complexity and reliability issues.
2Measurement precision
If multiple battery modules are monitored individually, then monitoring precision is improved, but system complexity and wiring requirements increase
Solution Approach 1:
The patent divides the battery system into multiple independent battery modules, each with its own battery management system that monitors individual module parameters. This segmentation allows precise monitoring of each module while maintaining modular independence, reducing overall system complexity through standardized module designs.
Solution Approach 2:
The patent creates universal battery management systems that can be applied to multiple different battery modules. Each BMS unit is designed with standardized functions and interfaces, allowing the same monitoring system to manage different battery modules through wireless communication, thereby reducing system complexity while maintaining monitoring precision.
3Loss of information
If battery modules use unique addresses for identification, then communication accuracy is improved, but data processing complexity increases
Solution Approach 1:
The patent assigns unique address identifiers to each battery management system, creating local quality differentiation in the communication protocol. This allows the energy management system to precisely identify and communicate with specific battery modules using their unique addresses, ensuring accurate data transmission while the standardized address format keeps processing complexity manageable.
Data Source
AI summary
Various techniques described herein relate to electric vehicle power management system for managing a plurality of battery modules in a battery pack. Such electric vehicle power management system may include a plurality of battery management systems corresponding to a plurality of battery modules, and an energy management system for managing the plurality of battery management systems. The energy management system and the plurality of battery management systems may adopt master-slave wireless communication, and may use a single wireless frequency channel or a plurality of assigned wireless frequency channels.