Integrated Charging Gun Control for Automatic AC/V2L Switching

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Solution Overview

Problem

Existing electric vehicles require separate charge and discharge guns, leading to increased cost, space occupation, and inconvenience due to the need for dual equipment, which existing solutions have not adequately addressed.

Innovation Solution

An integrated charging and discharging control system with a vehicle-mounted module, gun module, and connection modules, utilizing detection parameters to automatically switch between charging and discharging modes, reducing the need for manual selection and preventing simultaneous charging and discharging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If separate charge gun and discharge gun are equipped, then AC charge and V2L functions are achieved, but cost increases and storage space is occupied

Engineering Contradiction:

Improvecharging and discharging functionVSAvoidnumber of guns

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines the charging gun and discharging gun into a single integrated gun body that contains both charging and discharging terminals. This merging approach allows the vehicle to perform both AC charging and V2L (vehicle-to-load) discharging functions using one physical device, thereby reducing the number of separate guns needed while maintaining full functional capability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated gun body is designed with universal functionality to handle both charging and discharging operations. It includes a charging terminal connected to the power supply module for receiving AC power, and a discharging terminal connected to the inverter module for providing AC power to external loads. The control module automatically identifies the operation mode and routes power accordingly, making the single gun body universally applicable for both functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If separate charge gun and discharge gun are equipped, then AC charge and V2L functions are achieved, but storage space is occupied

Engineering Contradiction:

Improvecharging and discharging functionVSAvoidstorage space

Core Design Contradiction:

Adaptability or versatilityVSVolume of moving object

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

3Device complexity

If manual selection of charging and discharging modes is required, then system control is simple, but ease of operation deteriorates

Engineering Contradiction:

Improvecontrol systemVSAvoidmode selection

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The control module automatically identifies whether the gun body is in charging mode or discharging mode by detecting the connection state of the terminal, eliminating the need for manual mode selection by the user. The system self-determines the operation mode based on which terminal is connected and configured, and automatically routes power flow accordingly. This self-service approach significantly improves ease of operation while maintaining simple control system architecture.

Inventive Principle:

Principle #25Self-service

4Device complexity

If integrated charging and discharging module is used, then cost is reduced, but reliability must be maintained

Engineering Contradiction:

Improvenumber of gunsVSAvoidcharging and discharging operation

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The integrated gun body is segmented into distinct functional modules: a power supply module for charging operations, an inverter module for discharging operations, and a control module for managing both modes. Each module operates independently with dedicated circuits and control logic, ensuring that a fault in one module does not necessarily compromise the other modules. This modular segmentation within the integrated structure maintains reliability while achieving cost reduction through consolidation.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The control module dynamically switches between charging and discharging modes based on real-time detection of connection states and operational requirements. The system can flexibly transition between modes and automatically adjusts power flow direction, ensuring reliable operation under varying conditions. This dynamic control capability maintains high reliability by adapting to different operational scenarios while using a single integrated gun body.

Inventive Principle:

Principle #15Dynamics

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The system reduces production costs, improves convenience, enhances safety by preventing electric shock, and ensures reliable operation by automatically switching between charging and discharging functions.

Implementation Method 1

a power supply module, configured to convert an alternating-current voltage provided through the vehicle-mounted charging and discharging assembly or the charging connection module into a direct-current power supply voltage of the gun end control unit

Methodology Applied

Scientific EffectAlternating current to direct current conversion:

Data Source

PatentEP4269163B1Charging and discharging control system and method, and vehicle

Publication Date: 2025.10.29 CHINA FAW CO LTD

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AI summary

A charging and discharging control system includes a vehicle-mounted charging and discharging module (10), a charging and discharging gun module (20), a charging connection module (30) and a discharging connection module (40). The vehicle-mounted charging and discharging module (10) comprises a vehicle-mounted controller (110) and a vehicle-mounted charging and discharging assembly (120), and the vehicle-mounted controller (110) is configured to control the vehicle-mounted charging and discharging assembly (120) to operate in a charging state or a discharging state according to a first detection parameter. The charging and discharging gun module (20) comprises a gun end control unit (210), a discharging control switch (K1), a charging control switch (K2) and a power supply module (220), and the gun end control unit (210) is configured to obtain a second detection parameter on a charging and discharging gun side, control the charging control switch (K2) to be switched on and the discharging control switch (K1) to be switched off to execute charging operation in response to the second detection parameter satisfying a preset charging condition, and control the charging control switch (K2) to be switched off and the discharging control switch (K1) to be switched on to execute discharging operation in response to the second detection parameter satisfying a preset discharging condition. Further provided are a charging and discharging control method, and a transport.