Wireless Battery Management System with Relay Data Transmission

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Solution Overview

Problem

Current battery management systems for lithium batteries face challenges in monitoring state of charge due to non-linear discharge profiles, requiring complex and expensive wiring setups, and are difficult to maintain, especially in electric vehicles where hazardous connections need to be detected.

Innovation Solution

A battery management system with a computing device and battery unit monitoring modules that transmit data wirelessly, reducing the need for physical connections and allowing for efficient data collection from multiple batteries using a relay method, where each module sends data to the computing device and requests data from the next module, simplifying installation and maintenance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If wireless transmission is used to reduce wiring complexity, then device complexity is reduced, but reliability may be affected due to potential signal interference and communication errors

Engineering Contradiction:

Improvewiring complexityVSAvoiddata transmission reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent replaces the mechanical wiring system with a wireless communication system. Battery monitoring modules transmit data wirelessly to the display unit, eliminating the need for physical connection cables and reducing wiring complexity while maintaining data transmission functionality

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces wireless communication signals as an intermediary medium to transfer battery data from monitoring modules to the display unit, replacing direct physical connections and enabling data transmission without complex wiring

Inventive Principle:

Principle #24Intermediary (Mediator)

2Difficulty of detecting and measuring

If voltage measurement is used to monitor state of charge, then measurement simplicity is improved, but measurement precision deteriorates due to non-linear discharge profile of lithium batteries

Engineering Contradiction:

Improvestate of charge monitoring difficultyVSAvoidstate of charge measurement precision

Core Design Contradiction:

Difficulty of detecting and measuringVSMeasurement precision

Solution Approach 1:

The patent implements a feedback mechanism where the monitoring module continuously measures battery voltage and communicates it wirelessly to the display unit. The system provides real-time feedback on battery status, allowing for continuous monitoring and adjustment of state of charge assessment

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent employs periodic measurement and transmission of battery voltage data at regular intervals. This periodic action allows for continuous monitoring of the non-linear discharge profile, enabling more accurate tracking of state of charge changes over time through multiple data points

Inventive Principle:

Principle #19Periodic action

3Reliability

If extensive wiring is used to connect all battery components, then reliability of connection detection is improved, but ease of operation deteriorates due to difficult routing and maintenance

Engineering Contradiction:

Improveconnection detection reliabilityVSAvoidinstallation and maintenance ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent replaces extensive mechanical wiring connections with wireless communication between monitoring modules and the display unit. This substitution eliminates the need for complex cable routing while maintaining reliable data transmission for connection detection and monitoring

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts the data transmission function from the physical wiring system and implements it through wireless communication. By removing the extensive wiring infrastructure, the system simplifies installation and maintenance operations while retaining the ability to detect and monitor connections

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS9553460B2Wireless battery management system

Publication Date: 2017.01.24 ELITE POWER HLDG LLC

AI summary

A wireless battery management system includes a computing device and first and second battery unit monitoring modules. The computing device includes an output data request port and an input data port. In response to a data request from the output data request port of the computing device, a first battery unit monitoring module transmits data of the first battery unit to the input data port of the computing device wirelessly and may transmits a data request to the second battery unit monitoring module. In response, the second battery unit monitoring module may transmit data of the second battery unit to the input data port of the computing device wirelessly or transmit data of the second battery to the first module for wireless transmission. In addition, each battery unit monitoring module may communicate wirelessly and independently with the computing device.