EV Charging Stand Signal Segmentation
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Solution Overview
Problem
When multiple electric vehicles are connected to a charging stand, mutual interference between electric vehicle identification signals prevents proper charging, as the power supplying section cannot determine which vehicle the signal is from.
Innovation Solution
The power supply apparatus includes charging cables with both power supply lines and pilot lines, utilizing a charging-cable identification signal transmitting section to transmit unique identification signals to each electric vehicle, allowing the control section to recognize and manage electric vehicle identification signals without interference, enabling proper charging even when multiple vehicles are connected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple charging cables are connected to a single power supplying section, then the charging stand can charge multiple electric vehicles simultaneously, but mutual interference occurs between electric vehicle identification signals transmitted via different charging cables
Solution Approach 1:
The patent divides the identification signal transmission into separate channels by assigning different communication paths (e.g., different wires or signal lines within each charging cable) for different charging cables. This segmentation allows each charging cable to transmit identification signals independently without interfering with others, enabling simultaneous charging of multiple vehicles while maintaining reliable signal recognition.
Solution Approach 2:
The patent introduces an intermediary communication mechanism where each charging cable has its own dedicated signal transmission path that acts as a mediator between the power supplying section and the connected electric vehicle. This intermediary channel prevents direct interference between signals from different vehicles by providing isolated communication routes for each cable.
2Device complexity
If electric vehicle identification signals are transmitted via charging cables without dedicated communication lines, then the system structure is simplified, but signal interference occurs when multiple vehicles are connected
Solution Approach 1:
The patent segments the signal transmission by allocating separate communication wires or signal lines within each charging cable. This segmentation maintains relatively simple system structure while preventing signal interference, as each cable has its own dedicated communication path that does not conflict with others.
Solution Approach 2:
The patent resolves the conflict by adding another dimension to the signal transmission - using different spatial paths (separate wires or signal lines) within the charging cables. This dimensional separation allows multiple signals to coexist without interference while keeping the overall system structure relatively simple.
Data Source
Figure 1A~1B
Figure 2
Figure 3A~3B
AI summary
Provided are a power supply device and a power supply method which can carry out proper charging even when a plurality of electric automobiles are connected to a charging stand. A charging stand (1) is a power supply device which has a plurality of charging cables (4, 5) connected thereto and also supplies power to electric automobiles (2, 3) by way of the charging cables (4, 5). The charging stand (1) is provided with: a charging cable identification signal transmitter (9) for transmitting a charging cable identification signal to the electric automobiles by way of the charging cables (4, 5); an electric automobile identification signal receiver (10) for receiving an electric automobile identification signal and a charging cable identification signal from the electric automobiles (2, 3) by way of the charging cables (4, 5); and a controller (11) for charging the electric automobiles (2, 3) when the electric automobile identification signal receiver (10) receives the electric automobile identification signal and the charging cable identification signal.