Battery Module Identification via Shared Wireless and Wired Links
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Solution Overview
Problem
In electric vehicle battery systems, the time required for identifying multiple battery modules is excessively long due to individual wireless communication with each module, leading to prolonged vehicle startup times and user inconvenience.
Innovation Solution
A battery system design where a single battery module is equipped with both wireless receiving and transmitting units, allowing for wired communication among modules, reducing the need for individual wireless communication with the control apparatus and shortening the identification period by utilizing a ring topology for signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If individual wireless communication is performed with each battery module for identification, then module identification can be achieved, but the identification time becomes excessively long
Solution Approach 1:
Multiple battery modules share common wireless communication units (wireless receiving unit and wireless transmitting unit) instead of each module having its own units. The modules are grouped into battery groups where one or more modules share the wireless communication infrastructure, enabling simultaneous or coordinated identification of multiple modules through a single communication channel, thus reducing total identification time while maintaining accurate module identification.
2Adaptability or versatility
If each battery module is equipped with wireless communication units for individual identification, then communication flexibility is improved, but system complexity and cost increase
Solution Approach 1:
The wireless communication units (receiving and transmitting units) are designed as shared resources that serve multiple battery modules within a battery group. These universal units can communicate with multiple modules sequentially or in coordinated fashion, providing the same communication functionality to all modules without requiring duplicate hardware in each module, thereby reducing system complexity and cost while maintaining communication flexibility.
Data Source
AI summary
A battery system includes a plurality of battery modules and a control apparatus. The battery includes a battery group that includes two or more battery modules including battery units and battery monitoring units. The battery monitoring units of the battery modules being connected to each other via a communication line. The battery modules perform wired communication via the communication line. The battery group further includes a wireless receiving unit and a wireless transmitting unit. The wireless receiving unit wirelessly receives a command signal transmitted from the control apparatus. The wireless transmitting unit wirelessly transmits, to the control apparatus, a data signal including module identification information differing for each battery module. In the battery group, the wireless receiving unit is provided in a single battery module of the battery modules and the wireless transmitting unit is provided in a single battery module of the battery modules.