Electrified vehicle and method of controlling the same
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Solution Overview
Problem
The limited driving distance of electrified vehicles due to the long charging time and the need to increase battery voltage without strengthening the motor system withstand voltage design, the existing technologies have not effectively addressed the challenge of increasing the driving distance of electrified vehicles, the need to increase the driving distance of electrified vehicles, the need to provide a solution to enhance the driving distance without increasing battery voltage.
Innovation Solution
An electrified vehicle equipped with an auxiliary battery and a motor system that includes a main battery, a motor, a first inverter, a second inverter, and a controller that can switch between drive modes to utilize the auxiliary battery in conjunction with the main battery, allowing the vehicle to continue driving even in the event of inverter failure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the battery voltage is increased to increase the driving distance, then the driving distance is improved, but the motor system requires stronger withstand voltage design which increases system complexity and cost
Solution Approach 1:
The battery system is segmented into multiple battery packs (first battery pack, second battery pack, third battery pack) that can be independently controlled. By segmenting the battery system and using series/parallel switching, the patent achieves variable voltage output without requiring the entire motor system to withstand high voltage continuously, thus resolving the contradiction between driving distance and motor system complexity
Solution Approach 2:
The patent implements dynamic voltage switching capability where the battery management system can dynamically change the connection configuration (series/parallel) of battery packs based on driving conditions. This dynamic reconfiguration allows the system to adapt voltage output to match actual driving needs, avoiding the need for a motor system designed for maximum continuous high voltage
2Duration of action of moving object
If the battery capacity is increased to increase the driving distance, then the driving distance is improved, but the charging time increases which reduces productivity
Solution Approach 1:
The large-capacity battery system is divided into multiple independently controllable battery packs. This segmentation enables selective charging strategies where not all battery packs need to be charged simultaneously to maximum capacity, allowing flexible charging time management while maintaining sufficient total capacity for extended driving distance
Solution Approach 2:
The patent changes the operational parameters of the battery system by implementing variable voltage and capacity modes through different series/parallel configurations. This allows the system to operate at lower effective capacity for shorter trips (reducing charging needs) while maintaining high capacity availability for long-distance travel, thus resolving the contradiction between driving distance and charging time
3Duration of action of moving object
If the battery voltage is increased to increase the driving distance, then the driving distance is improved, but the charge capacity varies depending on connection configurations which reduces reliability
Solution Approach 1:
The battery management system implements feedback control by continuously monitoring the connection configurations and state of charge of individual battery packs. Based on this feedback, the system dynamically adjusts the series/parallel configuration to maintain consistent effective charge capacity across different operating conditions, ensuring reliable driving distance regardless of voltage changes
Solution Approach 2:
The patent systematically manages parameter changes by implementing controlled transitions between different battery pack configurations. The battery management system ensures that changes in voltage and capacity parameters are coordinated and predictable, maintaining reliable charge capacity delivery through structured parameter management rather than uncontrolled variation
4Duration of action of moving object
If an auxiliary battery is added to increase the driving distance, then the driving distance is improved, but the device complexity increases due to additional switching components
Solution Approach 1:
The auxiliary battery system is designed with multi-functionality where the same switching components and inverter infrastructure serve multiple purposes: normal vehicle operation, extended range extension, and fault condition mitigation. This universal design allows the auxiliary battery to contribute to driving distance without requiring completely separate dedicated systems, thus reducing the net increase in device complexity
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 auxiliary battery system efficiently increases the driving distance and ensures the vehicle can continue operating even with inverter failures, enhancing the vehicle's range and reliability.
Implementation Method 1
an auxiliary battery including a first end selectively connectable to the first node or the second node and a second end selectively connectable to the auxiliary battery in a state where the auxiliary battery is mounted
Data Source
AI summary
In an electrified vehicle and method for controlling the electrified vehicle, the electrified vehicle may include a main battery, a motor, a first inverter, a second inverter, a plurality of first changeover switches forming a first node, a plurality of second changeover switches forming a second node, and an auxiliary switch including one end selectively connectable to the first node or the second node and the other end selectively connectable to an auxiliary battery in a state where the auxiliary battery is mounted.