Charging Pile Power Allocation via Series Parallel Module Switching
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Solution Overview
Problem
Current electric vehicle charging pile systems struggle to adapt to diverse battery capacity requirements, as they are limited in adjusting charging voltage and current to meet the varying needs of different electric vehicles, leading to inefficiencies and resource waste.
Innovation Solution
A charging pile system with a power allocation unit that includes multiple switch groups and a controller, allowing for flexible configuration of charging pile module groups in series, parallel, or series and parallel connections to provide different output characteristics, enabling the system to meet the charging requirements of various electric vehicles by adjusting voltage and current ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the charging voltage is increased to improve charging rate, then the charging power is improved, but the adaptability to electric vehicles with different voltage requirements deteriorates
Solution Approach 1:
The charging pile system is divided into multiple independent charging pile module groups (first, second, third, fourth groups), each capable of operating independently. This segmentation allows the system to configure different numbers and combinations of module groups to match various voltage and power requirements of different electric vehicles, thereby improving adaptability while maintaining high charging power capability.
Solution Approach 2:
The system dynamically configures the connection mode (series or parallel) and quantity of charging pile module groups based on real-time detection of electric vehicle parameters such as voltage and power requirements. This dynamic adjustment enables the system to optimize charging power for each vehicle while maintaining broad adaptability across different vehicle types and battery configurations.
2Productivity
If the rated power of the charging pile is increased to ensure sufficient charging current, then the charging current capability is improved, but the charging capability is wasted due to inability to adapt to lower power requirements
Solution Approach 1:
The charging pile system divides the total charging capability into multiple independent module groups that can be selectively activated. When a small electric vehicle with lower power requirements connects, only one or a few module groups are activated, avoiding the waste that would occur if the entire high-power system operated at reduced capacity. This segmentation enables precise matching of charging output to actual vehicle needs.
Solution Approach 2:
The system changes operational parameters (number of active module groups, connection configuration) based on detected vehicle requirements. By adjusting these parameters dynamically, the system maintains high current capability when needed while reducing active components to match lower power demands, thereby eliminating energy waste from operating excess capacity.
3Productivity
If multiple charging pile modules are connected in parallel to increase current output, then the charging current is improved, but the maximum voltage output is limited
Solution Approach 1:
The system dynamically switches between series and parallel connection modes of charging pile module groups based on vehicle requirements. When high current is needed, modules are connected in parallel; when high voltage is needed, modules are connected in series. This dynamic reconfiguration allows the system to provide both high current and high voltage capabilities, resolving the limitation of fixed parallel connections.
Solution Approach 2:
Each charging pile module group is designed to be universally applicable in different connection configurations. The same module groups can be connected in series to achieve high voltage or in parallel to achieve high current, making the system multi-functional and capable of meeting diverse charging requirements without requiring separate dedicated hardware for each scenario.
Data Source
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AI summary
A charging pile system is provided, including: a system input bus (110), a plurality of charging pile module groups (130), a power allocation unit (150), and a plurality of charging terminals (170) corresponding to the plurality of charging pile module groups (130). The system input bus (110) is connected to input ends of the plurality of charging pile module groups (130), and output ends of the plurality of charging pile module groups (130) are connected to input ends of the plurality of charging terminals (170) by using the power allocation unit (150). The power allocation unit (150) includes a first switch group (151), a second switch group (153), a third switch group (155), and a controller (157), and each switch group includes a plurality of switching devices. The controller (157) is configured to control the plurality of switching devices, to combine the plurality of switching devices to flexibly configure, through serial or parallel connection, the plurality of charging pile module groups (130) for a charging terminal (170) that requires a power greater than an output power of a corresponding charging pile module group (130). The charging pile system can effectively increase ranges of an output voltage and an output current that are output to each charging terminal.