Battery Management EMI Analysis Using Near-Field Probes
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Solution Overview
Problem
Conventional EMS tests for battery management devices do not adequately assess the impact of electromagnetic noise on internal electrical components, limiting the ability to predict potential abnormal operations during design.
Innovation Solution
An electromagnetic noise penetration analysis apparatus and method that utilizes near-field measurement probes to quantify the influence of electromagnetic noise on internal components of battery management devices by measuring magnetic field intensity and frequency, allowing for precise identification of susceptible areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional EMS testing is performed using only external functional state variables, then the test procedure is simple and fast, but the measurement precision of electromagnetic noise impact on internal components is insufficient
Solution Approach 1:
The patent segments the battery management device into multiple function blocks (power supply management, power distribution management, digital input/output management, analog input management, communication management, and microcontroller unit). By dividing the device into these functional segments, the testing apparatus can target specific internal components with near-field measurement probes, enabling precise measurement of electromagnetic noise impact on individual function blocks while maintaining a modular testing approach that doesn't overly complicate the overall system.
Solution Approach 2:
The patent introduces near-field measurement probes as intermediary devices that bridge the gap between external electromagnetic noise sources and internal components. These probes act as mediators by positioning themselves near specific function blocks to capture magnetic field intensity and frequency data, thereby enabling indirect measurement of electromagnetic noise impact without requiring direct internal sensors within the battery management device.
2Reliability
If electromagnetic noise impact on internal components is not measured, then the testing process is fast and simple, but the reliability of predicting abnormal operations is reduced
Solution Approach 1:
The patent implements preliminary action by conducting electromagnetic noise susceptibility testing at the design stage using the enhanced testing apparatus. By performing measurements on magnetic field intensity and frequency near specific function blocks before final product deployment, potential abnormal operations can be predicted and addressed during the design phase, preventing costly redesigns later while maintaining efficient testing through targeted measurements.
Solution Approach 2:
The patent replaces traditional mechanical contact-based testing methods with near-field electromagnetic measurement techniques. Instead of physically accessing internal components or using complex probe assemblies, the system uses near-field probes to measure magnetic field characteristics non-contactually, substituting mechanical testing approaches with electromagnetic field-based measurements that are both faster and more reliable for predicting abnormal operations.
3Measurement precision
If comprehensive electromagnetic noise analysis is performed on all function blocks, then the measurement precision is high, but the device complexity and measurement time increase
Solution Approach 1:
The patent applies local quality by positioning near-field measurement probes near specific function blocks that are suspected to be vulnerable to electromagnetic noise based on their functional characteristics. Rather than uniformly measuring all components, the system focuses measurement resources on critical areas such as power supply management, power distribution management, and communication management modules, thereby achieving high measurement precision where needed while maintaining testing efficiency.
Solution Approach 2:
The patent implements partial action by selectively measuring only those function blocks that are most susceptible to electromagnetic noise based on their operational characteristics and position within the device. Instead of performing exhaustive measurements on all components, the system targets specific high-risk areas, achieving sufficient measurement precision for reliability assessment without the time and resource costs of comprehensive full-device scanning.
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
Enables the quantification and localization of electromagnetic noise susceptibility in battery management devices, facilitating proactive design adjustments to prevent abnormal operations and reducing redesign costs.
Implementation Method 1
measuring magnetic field intensity while electromagnetic noise, of a frequency that was applied when the first monitoring data was identified in the electromagnetic wave immunity test, is applied
Data Source
AI summary
An electromagnetic noise penetration analysis apparatus for analyzing electromagnetic wave noise penetrating a battery management device may include a plurality of internal electrical components grouped as function blocks based on each collective function. The electromagnetic noise penetration analysis apparatus may include one near-field measurement probe positioned near or adjacent to at least one electrical component of an associated function block, the electrical component being previously identified by associated monitoring data operating abnormally during an electromagnetic wave immunity test at a susceptible frequency, and configured to measure intensity of magnetic field near or at the identified electrical component, while simulated electromagnetic noise of a frequency comparable to the susceptible frequency is applied. An analyzer may be configured to quantify intensity of electromagnetic wave noise received by the electrical component represented by the function block based on the intensity of magnetic field measured by the near-field measurement probe.