Power supply device
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Solution Overview
Problem
Existing power supply devices for electric vehicles cannot adapt to multiple charging standards without interrupting the operation of the load due to significant voltage variations when switching battery connections.
Innovation Solution
A power supply device with multiple switches and terminals that allows batteries to be connected in parallel or series, ensuring consistent voltage to the load regardless of charger type, using a configuration of first, second, and third switches to manage connections between battery terminals and charger terminals.
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 power supply device can accommodate various chargers, but the voltage applied to the load varies significantly causing load operation interruption
Solution Approach 1:
The patent segments the battery connection control into independent switch modules (first switch between batteries, second and third switches for charger connection). This segmentation allows individual switch control to manage battery connections without causing overall system voltage fluctuations that would interrupt load operation.
Solution Approach 2:
The patent introduces a control unit as an intermediary that monitors charger connection status and automatically adjusts switch states. This intermediary component mediates between the charging system and load, preventing voltage variations from affecting load operation by coordinating battery connection changes.
2Adaptability or versatility
If switches are added to control battery connections for adapting to multiple chargers, then charging versatility is improved, but device complexity increases
Solution Approach 1:
The patent designs switches with multi-functionality where the first switch controls battery interconnection while the second and third switches simultaneously manage charger connection status. This universal switch design reduces the total number of components needed compared to dedicated switches for each function.
Solution Approach 2:
The patent merges the battery connection control function with the charger connection detection function into a unified switching system. By combining these functions into a coordinated switch network controlled by a single control unit, the overall device complexity is reduced despite achieving multiple charging standard compatibility.
Data Source
AI summary
A positive electrode-side input terminal is connected to a first positive electrode-side battery terminal, a negative electrode-side input terminal is connected to a second negative electrode-side battery terminal, a first switch is connected between a first negative electrode-side battery terminal and a second positive electrode-side battery terminal, a second switch is connected between a second positive electrode-side battery terminal and a first connection point between the positive electrode-side input terminal and the first positive electrode-side battery terminal, a third switch is connected between the first negative electrode-side battery terminal and a second connection point between the negative electrode-side input terminal and the second negative electrode-side battery terminal, a positive electrode-side output terminal is connected to a line connecting the second switch and the second positive electrode-side battery terminal, and a negative electrode-side output terminal to a line connecting the negative electrode-side input terminal and the second negative electrode-side battery terminal.