Double-Gun EV Fast Charging With Insulation Detection
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Solution Overview
Problem
European-standard single-gun charging systems for new energy vehicles are inefficient, leading to long charging times, underutilization of charging resources, and safety hazards due to lack of initial insulation detection.
Innovation Solution
A European standard-based double-gun high-power quick charging system and method, featuring a battery management system, charging communication modules, multiple chargers, and high-voltage charging loops, allowing independent control and communication between charging units to facilitate simultaneous or sequential charging of two guns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If European-standard single-gun charging mode is used, then system simplicity is maintained, but charging time increases and power utilization is reduced
Solution Approach 1:
The charging system is segmented into two independent charging guns (first charging gun and second charging gun), each capable of independent operation. The battery management system separately controls two independent charging loops, allowing simultaneous charging through both guns to reduce overall charging time while maintaining manageable system complexity through modular design
2Device complexity
If European-standard single-gun charging mode is used, then system structure is simple, but charging resource utilization rate decreases
Solution Approach 1:
The charging system is divided into two independent charging guns with separate control loops, enabling parallel charging operations that double the charging throughput and improve resource utilization rate while keeping each individual charging path relatively simple
Solution Approach 2:
The charging system is designed to support multiple charging modes including single-gun charging, double-gun simultaneous charging, and double-gun sequential charging. This multi-functionality allows the same charging station to serve different vehicle types and power requirements, significantly improving overall charging resource utilization
3Adaptability or versatility
If European-standard charging is used, then compatibility with existing standards is maintained, but insulation detection safety is compromised
Solution Approach 1:
The system performs insulation detection on the high-voltage charging loop before initiating charging operations. The battery management system detects insulation resistance values and determines whether to allow charging based on safety thresholds, preventing unsafe charging conditions while maintaining compatibility with European charging standards
4Device complexity
If single charger is used, then system complexity is low, but charger idleness increases when multiple vehicles need charging
Solution Approach 1:
The charging system is segmented into two independent charging guns, each with its own charging loop and control capability. This allows a single charging station to simultaneously serve two vehicles or two battery packs, eliminating charger idleness while keeping each individual charging path relatively simple and manageable
Data Source
AI summary
A European standard-based double-gun high-power quick charging system and method are disclosed. The system includes a battery management system, and at least two paths composed of corresponding charging communication modules, chargers and high-voltage charging loops, each of the chargers connected to at least one charging gun; the battery management system independently controls the charging communication module and high-voltage charging loop, and performs mapping management on a control signal and high-voltage charging loop; information interaction between different charging control units and chargers is carried out independently. By designing the system compatibility and time sequence difference when a double-gun system is connected, the problem of idle chargers is solved, so that the charging speed is increased, and the problems of long-time occupation of charging resources by vehicles and low utilization efficiency of vehicles are avoided; insulation detection performed on the initial charging of vehicle battery system increases safety of the system.