Charging Pile Communication Architecture With Direct BMS Link
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Solution Overview
Problem
Existing charging piles have complicated communication systems and high costs due to multiple communication levels between the micro control unit (MCU), power control unit, and charging devices, leading to inefficiencies and increased expenses.
Innovation Solution
An integrated charging device with a main circuit, controller, and communication module that directly communicates with the battery management system (BMS) via a CAN bus protocol, eliminating the need for intermediate MCU and power control units, and incorporating an auxiliary power output to simplify communication and reduce costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple charging devices and intermediate control units (MCU, power control unit) are used to achieve power control and charging control, then charging functionality is improved, but communication complexity and system cost increase
Solution Approach 1:
The patent merges the functions of the charging device, power control unit, and communication module into a single integrated charging device. The controller within the charging device directly communicates with the BMS, eliminating the need for separate MCU and power control units, thereby reducing communication levels and system complexity while maintaining charging functionality
Solution Approach 2:
The integrated charging device performs multiple functions including power conversion, charging control, and communication with the BMS within a single unit. The communication module handles both internal communication within the charging pile and external communication with the BMS, demonstrating multi-functionality that reduces overall system complexity
2Measurement precision
If multiple intermediate control units and communication levels are implemented, then control precision is improved, but system cost increases
Solution Approach 1:
The patent extracts and eliminates the intermediate control units (MCU and power control unit) from the system architecture. The charging device directly communicates with the BMS through the communication module, removing unnecessary components while maintaining control precision through direct controller-BMS communication
Data Source
AI summary
An integrated charging device, a charging pile and a method for controlling the charging pile are provided. In the integrated charging device, a controller is communicatively connected to a first end of a communication module. A second end of the communication module includes an external communication port. The external communication port is configured to be communicatively connected to a BMS of a load via a communication line in a charging gun connected to the integrated charging device. That is, the integrated charging device is capable of communicating with the BMS, so that the controller directly communicates with the BMS, without complicated transfer by an MCU and a power control unit in the conventional technology, thereby simplifying communication in the charging pile including the integrated charging device and reducing cost.