Wireless Battery Management Using BLE Fast Connection Setup
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Solution Overview
Problem
Existing battery management systems for vehicles require complex wired connections, which increase production costs and time, and existing wireless connections suffer from inefficiencies in connection procedures, leading to prolonged data transmission and reception times.
Innovation Solution
A wireless battery management system using Bluetooth Low Energy (BLE) communication, employing a simplified connection procedure that includes modified message formats and flexible scheduling methods to reduce connection time and improve reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wired battery connection method is used, then connection reliability is ensured, but production cost and time increase
Solution Approach 1:
The patent replaces the mechanical wired connection system with a wireless communication system. The battery management system uses wireless communication modules to establish connections between the master controller and slave controllers, eliminating the need for physical wired connections while maintaining communication reliability for battery state monitoring.
2Adaptability or versatility
If a standard wireless connection procedure is used, then connection flexibility is achieved, but connection time is prolonged
Solution Approach 1:
The patent implements a simplified connection procedure where the master controller proactively sends connection request messages to slave controllers instead of waiting for standard advertising and scanning procedures. This preliminary action approach reduces the number of communication rounds required for connection establishment, thereby reducing connection time while maintaining flexibility in battery pack configurations.
Data Source
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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.