Battery Pack RF Interference Cancellation for Wireless BMS Attacks
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Solution Overview
Problem
Wireless battery management systems (BMS) in electric vehicles are vulnerable to external intentional jamming attacks, network traffic sniffing, and network traffic spoofing due to the lack of communication wires, which can compromise the reliability and efficiency of the battery pack.
Innovation Solution
A method and apparatus that utilize external antennas to detect and cancel attack signals by analyzing RF signals, determining the strength of attack signals, and generating canceling RF signals with the same frequency and opposite phase to mitigate potential threats, thereby enhancing the security of the wireless communication system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If wireless communication is used in battery management system, then volume of battery pack is reduced and reliability is improved, but vulnerability to external jamming attacks and network traffic spoofing increases
Solution Approach 1:
The patent converts the harmful attack signal into a beneficial component by using it as part of the cancellation process. The system receives the attack signal through the antenna, analyzes its characteristics (frequency, phase, amplitude), and generates a counter signal that neutralizes the attack. This transforms the harmful electromagnetic interference into a controlled parameter that can be systematically eliminated, protecting the wireless communication while maintaining the wireless architecture's space-saving benefits
Solution Approach 2:
The system performs preliminary analysis of incoming RF signals to identify attack patterns before they can disrupt communication. By continuously monitoring signal characteristics and comparing them against known attack signatures, the system prepares counter-measures in advance. The attack signal analysis and counter signal generation occur proactively, preventing the harmful effects from manifesting in the battery management communication
2Device complexity
If wireless communication is used in battery management system, then complex wire harnesses are eliminated, but susceptibility to network traffic sniffing and spoofing increases
Solution Approach 1:
The patent introduces an intermediary defense mechanism between the wireless communication interface and the battery management system. The attack signal receiver and analyzer act as a mediator that intercepts, examines, and neutralizes malicious signals before they can reach the communication protocol layer. This intermediary layer maintains the simplicity of wireless communication while adding security functionality without requiring complex wired infrastructure
3Object-affected harmful factors
If attack signal cancellation is implemented, then defense against wireless attacks is improved, but complexity of signal processing increases
Solution Approach 1:
The patent segments the signal processing function into distinct modular components: an antenna for receiving signals, an analyzer for examining signal characteristics, a counter signal generator for creating cancellation signals, and a transmitter for sending the counter signals. This segmentation allows each component to perform a specific function with optimized complexity, making the overall system more manageable and implementable while effectively canceling attack signals through coordinated operation of these specialized modules
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, ensuring the reliability and efficiency of the battery management system and reducing the likelihood of disturbances or malicious attacks.
Implementation Method 1
collecting external RF signals through at least one external antenna
Implementation Method 2
generating a canceling RF signal having a same frequency as, and an opposite phase as, the attack signal, and transmitting the canceling RF signal through the external antenna
Data Source
AI summary
A method for defending against wireless attack is disclosed, the method including collecting external RF signals through at least one external antenna, determining an attack signal from the external RF signals, and canceling the attack signal.