Wireless Battery Pack Provisioning for BMS ID Assignment
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Solution Overview
Problem
Existing battery management systems for EV vehicles face increased manufacturing costs and volume due to the need for wired connections and difficulties in real-time individual ID assignment, especially in wireless systems, which complicates maintenance and repair.
Innovation Solution
A provisioning device and method that uses a communication module to wirelessly transmit a provisioning signal to battery management systems, allowing for efficient ID assignment and network ID assignment based on state information, reducing the need for additional interfaces and cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a wired battery management system is used to assign IDs, then ID assignment is reliable, but manufacturing cost and volume increase due to separate cables
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 transmit and receive ID assignment signals, eliminating the need for physical cables while maintaining reliable ID assignment through protocol-based communication handshaking and confirmation mechanisms.
2Ease of manufacture
If a wireless battery management system is used, then volume and cost are reduced, but real-time individual ID assignment becomes difficult
Solution Approach 1:
The patent implements preliminary action by having the battery management system enter a specific provisioning mode before ID assignment. The system prepares communication channels and protocols in advance, allowing the host device to efficiently assign IDs in real-time during the assembly process without requiring additional physical connections.
Solution Approach 2:
The patent uses a communication protocol as an intermediary between the host device and battery management system. This protocol mediates the ID assignment process by establishing structured communication sequences, including request-transmit-confirm cycles, enabling real-time ID assignment over wireless channels without requiring direct physical connections.
3Adaptability or versatility
If an additional infrared interface is used for ID assignment, then unique network ID assignment is enabled, but production cost increases
Solution Approach 1:
The patent applies universality by enabling the existing wireless communication module to perform multiple functions: both normal battery management communication and ID assignment operations. The communication protocol is designed to handle different message types including ID assignment requests, state information transmission, and confirmation signals, eliminating the need for dedicated additional interfaces.
Data Source
AI summary
A provisioning device includes a communication module capable of communicating with a plurality of battery management systems included in the battery pack; and a processor, wherein the processor causes the communication module to wirelessly transmit a provisioning signal for switching at least one battery management system of the plurality of battery management systems to a provisioning mode, receives state information of the battery and the battery management system from the plurality of battery management systems through the communication module, and assigns an ID of a network of the battery pack and an ID of each of the battery management system based on the state information of the battery management system received through the communication module.