Shared-Inductor Buck-Boost Battery Current Generation
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Solution Overview
Problem
The complexity and cost of electrochemical impedance spectroscopy in batteries are high due to the large number of cells, requiring significant space and complexity, which increases the need for space and cost.
Innovation Solution
A device that uses a buck and boost converter circuit with a shared inductor to transfer electrical energy between a battery and an inverter capacitor, allowing for efficient generation of battery current with low technical complexity and cost by alternating the direction of energy flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If impedance spectroscopy is performed at cell level for batteries with large number of cells, then measurement precision is improved, but device complexity and space requirements increase significantly
Solution Approach 1:
The patent merges the impedance measurement function with the existing inverter capacitor by using it as the measurement capacitor. This eliminates the need for separate measurement equipment and reduces system complexity while maintaining measurement precision through the shared capacitor integration.
Solution Approach 2:
The inverter capacitor serves dual purposes: it functions as both the inverter's energy storage capacitor and the measurement capacitor for impedance spectroscopy. This multi-functionality reduces the number of components needed and simplifies the overall system architecture.
2Measurement precision
If separate measurement equipment is added for battery impedance spectroscopy, then measurement precision is improved, but cost increases
Solution Approach 1:
The inverter capacitor is designed to serve both as the inverter's operational capacitor and as the measurement capacitor for impedance spectroscopy. This eliminates the need for separate measurement equipment, thereby reducing manufacturing costs while maintaining measurement precision.
Solution Approach 2:
The patent combines the measurement function with the existing inverter components, specifically using the inverter capacitor for both inverter operation and impedance measurement. This integration eliminates redundant components and reduces overall system cost.
3Measurement precision
If additional capacitors are added for measurement purposes, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The inverter capacitor is utilized for dual purposes: maintaining inverter operation and enabling impedance spectroscopy measurements. This eliminates the need for additional capacitors and reduces circuit complexity while preserving measurement precision.
Solution Approach 2:
The patent merges the measurement capacitor function with the existing inverter capacitor, eliminating the need for separate measurement capacitors. This integration simplifies the circuit architecture while maintaining the precision required for impedance spectroscopy.
4Measurement precision
If battery current is generated with conventional methods, then measurement precision is improved, but energy losses increase
Solution Approach 1:
The patent combines the current generation function with the existing inverter circuitry, using the inverter capacitor as part of the measurement current generation path. This integration reduces energy losses by utilizing existing low-resistance pathways rather than introducing separate current generation equipment.
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
The device enables cost-effective and space-efficient generation of battery current with low electrical losses, utilizing existing components and reducing the need for additional capacitors, thus simplifying impedance spectroscopy.
Implementation Method 1
an inverter capacitor of the inverter can be coupled between the first inverter terminal and the second inverter terminal
Implementation Method 2
an inductor; wherein the device comprises a first circuit unit configured to form with the inverter capacitor a buck converter to transfer electrical energy from the battery to the inverter capacitor
Data Source
AI summary
The present disclosure relates to a device for generating a battery current at a battery, wherein the device comprises: first and second battery terminals for connection to the battery; first and second inverter terminals for connection to an inverter so that an inverter capacitor of the inverter can be coupled between the first inverter terminal and the second inverter terminal; and an inductor; wherein the device comprises a first circuit unit configured to form with the inverter capacitor a buck converter to transfer electrical energy from the battery to the inverter capacitor; wherein the device comprises a second circuit unit configured to form with the inverter capacitor a boost converter to transfer electrical energy from the inverter capacitor to the battery; and wherein the inductor is a component of both the first and second circuit units. The present disclosure also relates to a system including the device and a method for the device.