Battery Pack RF Attack Cancellation for Wireless BMS Integrity
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Solution Overview
Problem
Wireless battery management systems in electric vehicles are vulnerable to external intentional jamming attacks, network traffic sniffing, and network traffic spoofing, compromising communication reliability and efficiency.
Innovation Solution
A method and apparatus for detecting and canceling attack signals using external RF signals, involving external antennas, signal analysis, and generating counter signals with the same frequency and opposite phase to neutralize threats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless communication is used in battery management system, then volume of battery pack is reduced and reliability is improved, but vulnerability to external intentional jamming attacks and network traffic sniffing increases
Solution Approach 1:
The system performs preliminary detection of RF signals to identify attack signals before they can compromise communication. By detecting jamming, sniffing, and spoofing signals in advance and generating canceling signals, the system prevents these harmful wireless attacks from disrupting the battery management communication, thus maintaining reliability while using wireless technology
Solution Approach 2:
The system converts the harmful attack RF signals into beneficial information by detecting their characteristics (frequency, strength, phase). This detection information is then used to generate canceling signals with opposite phase, transforming the harmful attack energy into a neutralized state that protects the communication system
2Reliability
If external antennas and signal detection apparatus are added to detect and cancel attack signals, then defense capability against wireless attacks is improved, but device complexity increases
Solution Approach 1:
The external antenna is designed to perform multiple functions: receiving normal wireless communication signals between master and slave BMS, detecting potential attack signals (jamming, sniffing, spoofing), and transmitting canceling signals. This multi-functionality reduces the need for separate dedicated components for each function, thereby limiting the increase in device complexity while maintaining comprehensive defense capability
Solution Approach 2:
The signal detection and cancellation functions are integrated into the existing wireless communication infrastructure. The external antenna serves both communication and security functions, and the canceling signal generation is coordinated with the normal communication protocol, merging security functions with existing system components to minimize added complexity
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
Effectively defends against wireless attacks by identifying and neutralizing malicious signals, maintaining communication integrity and preventing disturbances in the battery management system.
Implementation Method 1
collecting external RF signals through at least one external antenna mounted on a battery pack
Implementation Method 2
generating a canceling RF signal having the same frequency and opposite phase as the RF signal corresponding to the attack signal; and transmitting the canceling RF signal through the external antenna
Data Source
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AI summary
A method for defending against wireless attack is disclosed. The method for defending against wireless attack includes: collecting external RF signals through at least one external antenna (310) mounted on a battery pack (10); determining an attack signal from the collected external RF signals; and canceling an external RF signal corresponding to the attack signal.