EV Domain Control Unit for Faster Power-On and Simpler Wiring
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Solution Overview
Problem
The existing electric vehicle control systems face challenges with complex wiring, long power-on and power-off times, and increased fault susceptibility due to scattered control components like VCU, BMS, and MCU requiring complex communication and control strategies, affecting user experience.
Innovation Solution
An electric vehicle control system integrating a domain control unit (DCU) that directly manages and controls power battery, motor driver module, and electrical devices through simplified wiring and communication, eliminating the need for complex protocols and independent controller interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control components (VCU, BMS, MCU) are scattered and communicate through CAN bus, then each component can independently perform its control function, but the wiring becomes complex, communication cycle increases, and power-on/power-off time is prolonged
Solution Approach 1:
The patent merges the VCU, BMS, and MCU into a single integrated control unit. This consolidation eliminates the need for complex CAN bus communication between multiple scattered controllers, directly reducing wiring complexity while maintaining all necessary control functions within one unified device.
Solution Approach 2:
The integrated control unit performs multiple functions that were previously distributed across separate components: vehicle control, battery management, and motor control. This multi-functional approach maintains comprehensive control capability while simplifying the overall system architecture and reducing communication overhead.
2Manufacturing precision
If multiple independent controllers (VCU, BMS, MCU) perform mutual logical judgment before relay control, then control precision is improved, but the power-on and power-off time increases
Solution Approach 1:
By combining multiple controllers into one integrated unit, the patent eliminates the sequential communication and mutual logical judgment processes between separate devices. The integrated controller can execute all control logic internally in parallel, maintaining precision while dramatically reducing the time required for power-on and power-off operations.
Solution Approach 2:
The integrated control unit pre-configures all control logic and parameters internally before operation begins. This preliminary preparation eliminates the need for real-time communication and coordination between multiple controllers during critical power-on/power-off transitions, enabling faster response while maintaining control accuracy.
3Manufacturing precision
If scattered control components communicate through complex protocols, then control strategy accuracy is improved, but the system becomes prone to faults and communication delays
Solution Approach 1:
The patent resolves the contradiction by merging all control components into a single integrated unit. This eliminates the complex inter-controller communication protocols that cause delays and faults, while all control strategies are executed internally with full accuracy. The unified architecture removes communication interfaces that are potential failure points.
Data Source
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AI summary
An electric vehicle control system and a control method, an electric vehicle power-on method, an electric vehicle power-off method, and an electric vehicle charging method are disclosed in this invention. The control system includes a domain control unit controlling an electric vehicle, a current sampling unit sampling the current of a power battery and a motor of the electric vehicle and sending sampling signals to the domain control unit, and electrical device, driven by the power battery, sampling the current flowing through it and sending the sampling signals to the domain control unit. The domain control unit, according to the sampling signals sent by the electrical device and the current sampling unit, manages the power battery and controls a motor driver module and the electrical device. The structure of the control system and the control policy are simplified and the power-on and power-off time is shortened.