Vehicle Battery System Motor-Based Boost Converter
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Solution Overview
Problem
Existing battery systems for vehicles are costly and heavy due to the need for expensive and heavy components like high-voltage switches, inductors, capacitors, and transformers in on-board chargers, which negatively impact fuel economy and increase overall costs.
Innovation Solution
A battery system that includes a charging apparatus converting alternating current to direct current using a micro-control unit with a boost converter configured by a motor and inverter, applying a 3-phase interleaved control technique, and utilizing a DC-DC converter to improve efficiency and controllability, replacing traditional boost converters with a motor and inverter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional on-board charger components (high-voltage switch, inductor, capacitor, transformer) are used, then reliable power conversion is achieved, but system cost and weight increase
Solution Approach 1:
The patent merges the functions of the high-voltage switch, inductor, capacitor, and transformer into an integrated power conversion module. This consolidation maintains the necessary power conversion reliability while reducing the overall weight and component count of the on-board charger system.
Solution Approach 2:
The integrated power conversion module is designed to perform multiple functions simultaneously - voltage switching, energy storage, and power transformation - allowing a single component to replace multiple traditional components, thereby reducing weight while maintaining reliability.
2Reliability
If traditional on-board charger components are used, then power conversion function is achieved, but system cost increases
Solution Approach 1:
By combining multiple discrete components into an integrated power conversion module, the patent reduces the total number of parts that need to be manufactured, assembled, and tested. This integration lowers manufacturing complexity and system cost while preserving the reliable power conversion function.
3Power
If traditional boost converter configuration is used, then voltage boosting is achieved, but device complexity and size increase
Solution Approach 1:
The patent integrates the boost converter functionality into the unified power conversion module, eliminating the need for separate boost converter components. This integration maintains the voltage boosting capability while reducing overall device complexity and size.
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 configuration reduces costs and sizes associated with traditional converters, enhancing control reliability and efficiency while effectively charging high-voltage batteries at a lower cost.
Implementation Method 1
a micro-control unit (MCU) configured to boost an output voltage of the OBC by use of a boost converter configured by a motor and an inverter
Implementation Method 2
operating the motor, in a motor driving mode, by receiving a DC voltage from the battery and outputting a 3-phase AC voltage through the inverter
Data Source
AI summary
A battery system for a vehicle may include: a charging apparatus configured to receive an alternating current power from the outside thereof in a wired/wireless manner; an on-board charger (OBC) configured to convert the alternating current power of the charging apparatus into a direct current power; a micro-control unit (MCU) configured to boost an output voltage of the OBC by use of a boost converter configured by a motor and an inverter; and a battery connected to the MCU and configured to be charged with the boosted output voltage.