Battery Module Pressure Sensing for Wireless BMS ID Assignment
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Solution Overview
Problem
In energy storage systems (ESS) with multiple battery racks, it is challenging for upper-level Battery Management Systems (BMS) to automatically assign IDs to lower-level BMSs within the same battery rack due to wireless signal interference.
Innovation Solution
The system incorporates a pressure detection unit in each battery module that communicates wirelessly with the upper-level BMS. The pressure detection unit generates a pressure value based on the module's insertion into a battery rack, which is then used by the upper-level BMS to automatically assign a unique ID to the lower-level BMS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless communication is used for BMS communication in multiple battery racks, then communication flexibility and installation ease are improved, but signal interference and ID assignment difficulty occur
Solution Approach 1:
A pressure signal is introduced as an intermediary medium to convey battery rack position information. The pressure signal acts as a mediator between the physical insertion state and the wireless communication system, enabling the upper-level BMS to identify the correct lower-level BMS without relying solely on wireless signals that may be interfered with in multi-rack environments.
2Measurement precision
If manual ID assignment is performed for lower-level BMS, then ID assignment accuracy is improved, but installation time and labor cost increase
Solution Approach 1:
The system enables automatic ID assignment where the upper-level BMS autonomously identifies and assigns IDs to lower-level BMS units based on pressure signals detected during insertion. This self-service mechanism eliminates the need for manual intervention, thereby reducing installation time and labor costs while maintaining accurate ID assignment through the reliable pressure-based identification method.
Solution Approach 2:
The pressure signal is detected and processed in advance during the battery module insertion process, before wireless communication for ID assignment takes place. This preliminary detection of position information allows the system to prepare for accurate and automatic ID assignment, avoiding the need for subsequent manual intervention.
3Extent of automation
If pressure detection is added to battery modules, then automatic ID assignment capability is improved, but device complexity and cost increase
Solution Approach 1:
The pressure detection unit is designed to serve multiple functions: it not only provides position information for automatic ID assignment but also potentially monitors insertion status and provides feedback for system diagnostics. This multi-functionality justifies the added complexity by delivering multiple benefits from a single component addition.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables efficient and automated ID assignment for lower-level BMSs, improving the management and installation efficiency of ESS systems by reducing manual intervention and potential errors.
Implementation Method 1
a pressure detection unit provided on a predetermined surface part of the battery module and configured to detect a pressure applied to the predetermined surface part and output a pressure value
Implementation Method 2
a wireless communication unit configured to transmit a pressure detection signal including the pressure value to the upper-level BMS through wireless communication
Data Source
AI summary
A battery module, an upper-level battery management system (BMS), and an automatic identification (ID) assignment system of a battery module are provided. A battery module, configured to wirelessly communicate with an upper-level battery management system (BMS) and be inserted into at least one battery module mounting part formed in a battery rack, includes: a pressure detection unit provided on a predetermined surface part of the battery module, the pressure detection unit being configured to: detect a pressure applied to the predetermined surface part, and output a pressure value, a wireless communication unit configured to transmit a pressure detection signal including the pressure value to the upper-level BMS through wireless communication, and a control unit configured to set and register a received identification (ID) information as its own ID when the ID information automatically assigned from the upper-level BMS is received.