Modular Battery Storage PWM Housing for EMI Shielding
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Solution Overview
Problem
Modular battery storage systems face limitations due to high-frequency pulse width modulation (PWM) causing electromagnetic compatibility issues and requiring complex shielding and cooling measures, which increase costs and reduce functionality.
Innovation Solution
A modular battery storage system with a central pulse width modulation unit that shields electromagnetic interference, eliminating the need for PWM in individual energy storage modules and simplifying the system design, using a pulse width modulation switch and filter choke within a housing to generate a sinusoidal voltage waveform.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pulse width modulation (PWM) is performed at high frequencies in individual energy storage modules, then the approximation of the desired output voltage is improved, but electromagnetic compatibility deteriorates and complex shielding measures become necessary
Solution Approach 1:
The PWM function is extracted from individual energy storage modules and centralized in a single modulator unit. This removes the source of electromagnetic interference from multiple distributed locations, concentrating it in one shielded location while maintaining the voltage approximation benefits of PWM
Solution Approach 2:
Multiple PWM switches that would be distributed across individual modules are merged into a single PWM switch in the modulator. This consolidation allows for centralized shielding and reduces the overall electromagnetic compatibility problems while maintaining the ability to approximate the desired sinusoidal voltage waveform
2Manufacturing precision
If high frequencies are used for pulse width modulation, then the voltage waveform approximation is improved, but heating increases and cooling measures become necessary
Solution Approach 1:
The high-frequency PWM switching operation is extracted from individual modules and performed centrally in the modulator. This concentrates the heat-generating switching losses in one location that can be more effectively managed through centralized cooling rather than requiring cooling measures across multiple distributed modules
3Object-affected harmful factors
If complex shielding measures are implemented to address electromagnetic interference, then electromagnetic compatibility is improved, but device complexity and costs increase
Solution Approach 1:
The electromagnetic interference problem is extracted from multiple distributed sources in individual modules and concentrated in a single modulator unit. This allows for a single centralized shielding solution rather than requiring complex distributed shielding across the entire battery storage system
Solution Approach 2:
The shielding requirements for multiple PWM switches are merged into a single shielding requirement for one modulator unit. This consolidation significantly reduces the overall complexity and cost of electromagnetic shielding measures while maintaining electromagnetic compatibility
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 improves electromagnetic compatibility, reduces shielding and cooling requirements, and lowers costs by simplifying the design of individual energy storage modules and the overall system, while maintaining high-frequency PWM effectiveness.
Implementation Method 1
perform pulse width modulation (PWM) on the individual voltages generated
Implementation Method 2
a housing encloses the pulse width modulation switch and is adapted to shield electronic components outside the housing from electromagnetic interference radiation emanating from the pulse width modulation switch
Implementation Method 3
The modulator includes a pulse width modulation switch
Data Source
AI summary
A modular battery storage system includes an array of n rechargeable energy storage modules. Each respective energy storage module is assigned a respective switch via which the respective energy storage module can be activated and deactivated. The n rechargeable energy storage modules are configured to be interconnected, via the switches, such that a total voltage UTotal provided by the array of n rechargeable energy storage modules is a sum of respective individual voltages Usingle of activated energy storage modules. The modular battery storage system further includes a controller, configured to control the switches, and a modulator, connected to the n rechargeable energy storage modules and configured to modulate the total voltage UTotal. The modulator includes a pulse width modulation switch. A housing encloses the pulse width modulation switch and is adapted to shield electronic components outside the housing from electromagnetic interference radiation emanating from the pulse width modulation switch.