Wireless Battery Management System Reducing Connection Time
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Solution Overview
Problem
Current battery management systems for vehicles rely on wired connections, which are cumbersome and inefficient, especially with the increasing complexity of vehicle systems and the need for flexible battery pack designs, requiring a wireless solution to simplify connection procedures and reduce connection time.
Innovation Solution
A wireless battery management system that employs a cell module controller with a wireless communication module and a battery master controller, which transmits an Advertising message and receives a Connection Indication message to establish connections without version checks or security key exchanges, allowing for efficient data transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wired connection method is used for battery management system, then connection stability is ensured, but mechanical design flexibility and connection time are reduced
Solution Approach 1:
The patent replaces the mechanical wired connection system with a wireless communication system. The battery master controller and cell module controllers establish connections through wireless advertising and connection indication messages, eliminating physical cables and connectors. This substitution directly addresses the contradiction by providing both design flexibility (no mechanical constraints) and rapid connection establishment.
2Reliability
If standard wireless connection procedure with version checks and security exchanges is used, then connection reliability is improved, but connection time increases
Solution Approach 1:
The patent performs version information and security capability exchanges during the advertising phase, before formal connection establishment. The battery master controller includes version and security support information in advertising messages, and cell module controllers respond with their capabilities in connection indication messages. This preliminary action allows the actual connection process to skip these verification steps, significantly reducing connection time while maintaining reliability through pre-validated compatibility information.
Solution Approach 2:
The patent merges multiple separate communication steps into a streamlined process. Version checks, security capability exchanges, and connection establishment are combined into a single integrated message exchange sequence. The advertising message and connection indication message simultaneously convey version information, security capabilities, and connection requests, eliminating the need for separate verification steps and reducing overall connection time.
Data Source
AI summary
In order to achieve objectives and advantages of the present invention, a wireless battery management system for a vehicle, according to the embodiments of the present invention, comprises: one or more slave battery control units (cell module control, CMC), each comprising a wireless communication module and a battery module; and a master battery control unit (battery master control, BMC) which manages the one or more slave battery control units by being wirelessly connected to the wireless communication module of the one or more slave battery control units, wherein the master battery control unit is configured to transmit an advertisement message set for the one or more slave battery control units, and receive a connection instruction message from the one or more slave battery control units, and wherein the master battery control unit manages the one or more slave battery control units without any confirmation of a version and without any exchange of a separate message regarding a supported function and encryption key exchange, on the basis of the set advertisement message and the connection instruction message.