Fuel Cell High Voltage Controller Dedicated Shutdown Wiring
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Solution Overview
Problem
Fuel cell systems face malfunctions due to slow inverter shutdowns caused by hard stop signals from converters, leading to control operation issues and potential system malfunctions.
Innovation Solution
A fuel cell system design featuring high voltage unit controllers that monitor hard shutdown signals via dedicated wire lines, allowing for independent shutdown of high voltage units and partial control function cessation without general controller commands, and a general controller that outputs hard shutdown signals through dedicated wire lines in response to shutdown requests from high voltage unit controllers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the converter and inverter are connected directly by a hard line (direct wire line), then fault transmission speed is improved, but control operation reliability deteriorates due to malfunction propagation
Solution Approach 1:
The system divides the control architecture into multiple independent controllers (converter controller, inverter controller, general controller) with dedicated communication pathways. Each controller operates independently with its own monitoring and shutdown capabilities, preventing malfunction propagation between units while maintaining fast fault response through direct wire connections for shutdown signals.
Solution Approach 2:
The patent introduces a general controller as an intermediary that receives shutdown requests from any controller and distributes hard shutdown signals through dedicated wire lines to all high voltage unit controllers. This mediator coordinate the shutdown process, ensuring simultaneous and controlled stopping of all units without direct fault transmission between converters and inverters.
2Stability of the object's composition
If the inverter controller obeys error signals through communication lines, then system coordination is improved, but shutdown speed deteriorates causing control malfunctions
Solution Approach 1:
The system implements dynamic shutdown signaling where the shutdown signal transmission method changes based on the shutdown phase. During normal operation, controllers communicate through communication lines for coordination. During shutdown, hard shutdown signals are transmitted through dedicated wire lines for immediate response, dynamically switching between communication modes to optimize both coordination and speed.
Solution Approach 2:
The patent establishes predetermined shutdown pathways with dedicated wire lines connected to monitoring units in each high voltage unit controller before faults occur. When a shutdown request is generated, the pre-configured hard shutdown signal is immediately transmitted through these dedicated lines, eliminating the need for real-time communication processing and ensuring ultra-fast shutdown response.
3Stability of the object's composition
If multiple controllers communicate through communication lines, then control coordination is improved, but shutdown response time deteriorates
Solution Approach 1:
The patent extracts the shutdown signal transmission function from the general communication line system and creates a separate, dedicated wire line network specifically for hard shutdown signals. This extraction allows shutdown commands to bypass the normal communication protocol processing, achieving immediate response while the communication lines continue to handle coordination tasks without interference.
Data Source
AI summary
A plurality of high voltage unit controllers each includes: a monitoring unit that monitors the hard shutdown signal sent through the dedicated wire lines; and a shutdown unit that, based on a monitoring result of the monitoring unit, stops operation of the high voltage unit that is under control of this high voltage unit controller, and further stops at least part of control functions of this high voltage unit controller.