Charging Controller State Machine Selection
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Solution Overview
Problem
The lack of standardized safety requirements and charging protocols worldwide necessitates the development of different charging station controllers for electric vehicles, making it inefficient to use a single controller across various regions.
Innovation Solution
A charging device and system that includes a processing device and memory to select and operate based on multiple state machines, allowing a single controller to adhere to various regional standards and protocols by storing and initializing different state machines corresponding to specific charging station models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If different charging station controllers are designed for different regions to meet local safety requirements and charging protocols, then compliance with local standards is improved, but device complexity and manufacturing costs increase
Solution Approach 1:
The charging station controller is designed with multi-functionality to operate under multiple charging protocols and safety standards simultaneously. The controller includes a state machine module that can select and execute different state machines corresponding to different regional standards (e.g., SAE J1772 for North America, IEC 61851 for Europe, GB/T for China), allowing a single controller design to serve multiple markets without requiring region-specific hardware variants.
Solution Approach 2:
The controller employs dynamic configuration through selectable state machines that can be activated based on the detected vehicle type, connector type, or operational context. The system dynamically transitions between different charging protocols during operation, enabling adaptability to different regional requirements without physical reconfiguration or multiple dedicated controller units.
2Ease of manufacture
If a single charging station controller is used across all regions, then manufacturing efficiency and cost are improved, but compliance with diverse local safety requirements and charging protocols deteriorates
Solution Approach 1:
A universal controller design incorporates multiple charging protocol implementations (SAE J1772, IEC 61851, GB/T) within a single device. The controller uses a configurable state machine architecture that can be programmed to comply with different regional standards, enabling mass production of identical controller units that can be deployed globally with software configuration rather than hardware customization.
Solution Approach 2:
The controller achieves compliance with different regional standards by changing operational parameters and control logic through software configuration rather than hardware modification. Different state machines implement different safety thresholds, communication protocols, and charging sequences appropriate for each region, allowing a single manufacturing line to produce controllers that adapt to local requirements through parameter settings.
3Adaptability or versatility
If multiple state machines are stored in the controller to support different charging protocols, then adaptability to different regions is improved, but memory requirements and processing complexity increase
Solution Approach 1:
The control software is segmented into separate, modular state machines, each dedicated to a specific charging protocol (SAE J1772 state machine, IEC 61851 state machine, GB/T state machine). Each state machine is an independent functional module that can be individually activated. This segmentation allows the controller to load only the necessary state machine for the current operational context, reducing active processing complexity while maintaining the capability to support multiple protocols.
Solution Approach 2:
A central controller architecture acts as an intermediary that manages multiple protocol-specific state machines. The controller includes a protocol detection mechanism that identifies the required charging standard and activates the corresponding state machine, mediating between the physical charging interface and the protocol-specific control logic. This intermediary layer simplifies the overall system by providing a unified interface while managing the complexity of multiple protocols internally.
Data Source
AI summary
A charging device for charging an energy storage device is described. The charging device includes a memory for storing a plurality of state machines and a processing device coupled to the memory. The processing device is configured to select a state machine of the plurality of state machines and to operate the charging device in accordance with the selected state machine.