Battery Reconfiguration Circuit for Multi-Standard EV Charging
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Solution Overview
Problem
The existing power supply devices for electric vehicles cannot adapt to multiple charging standards without interrupting the operation of the load, as the voltage applied to the load varies significantly during switching between battery connections.
Innovation Solution
A power supply device with a configuration that includes multiple switches and a power converter, allowing batteries to be connected in parallel or series to match different charger voltages, ensuring continuous operation and appropriate voltage supply to the load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the connection of two batteries is switched between parallel and series to adapt to different charging standards, then the adaptability to various chargers is improved, but the voltage applied to the load varies significantly causing operation interruption
Solution Approach 1:
A power converter is introduced as an intermediary device between the battery system and the load. The power converter actively manages voltage transitions during battery connection switching, ensuring stable voltage supply to the load while allowing the batteries to be reconfigured for different charging standards.
Solution Approach 2:
The battery system is divided into two separate batteries with independent connection paths. This segmentation allows flexible configuration (parallel or series) of the batteries while the power converter independently manages the voltage output to maintain load operation continuity.
2Adaptability or versatility
If switches are added to enable flexible battery connection configuration, then the adaptability to different charging standards is improved, but the device complexity increases
Solution Approach 1:
The power converter serves multiple functions simultaneously: it manages voltage regulation, controls battery connection switching, and ensures load operation continuity. This multi-functionality reduces the need for additional dedicated components, thereby limiting the increase in device complexity despite the added flexibility.
Data Source
AI summary
Positive electrode-side input terminal is connected to first positive electrode-side battery terminal, negative electrode-side input terminal is connected to second negative electrode-side battery terminal, a switch is connected between first negative electrode-side battery terminal and second positive electrode-side battery terminal, between second positive electrode-side battery terminal and first connection point between positive electrode-side input terminal and first positive electrode-side battery terminal, and between first negative electrode-side battery terminal and second connection point between negative electrode-side input terminal and second negative electrode-side battery terminal, positive electrode-side output terminal is connected to positive electrode-side converter output terminal, negative electrode-side output terminal is connected to negative electrode-side converter output terminal, positive electrode-side converter input terminal is connected to a line connecting positive electrode-side input terminal and first positive electrode-side battery terminal, and negative electrode-side converter input terminal is connected to a line connecting negative electrode-side input terminal and second negative electrode-side battery terminal.