Battery Control System with Adjustable Capacity for Hybrid Vehicles
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Solution Overview
Problem
Existing battery systems in hybrid vehicles face challenges in efficiently managing multiple operating modes and voltage levels, leading to suboptimal performance and potential faults in charging sources, which affect the overall efficiency and reliability of the vehicle's propulsion and electrical systems.
Innovation Solution
A battery control system with multiple terminals and switches, managed by a mode module and switch control module, which adjusts the connection of individual battery groups to provide different voltage levels and capacities based on various operational modes, including fault detection and pre-charge circuits to stabilize voltage transitions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the battery system uses multiple individual groups of battery cells with switches to adjust capacity, then the adaptability to different operating modes is improved, but the device complexity increases
Solution Approach 1:
The battery system is divided into multiple individual groups of battery cells (first, second, third, and fourth individual groups), each group capable of being independently connected or disconnected from the terminals through switches. This segmentation allows the system to adjust its total capacity dynamically based on operating conditions, resolving the contradiction by enabling adaptability through modular architecture while managing complexity through standardized switch control mechanisms.
2Use of energy by moving object
If the switch control module adjusts capacity allotment based on different modes, then the efficiency of energy usage is improved, but the difficulty of detecting and measuring system state increases
Solution Approach 1:
The mode module continuously monitors system conditions (such as state of charge, operating mode, and fault status) and provides feedback to the switch control module. The switch control module adjusts the capacity allotment of battery groups based on this feedback, enabling efficient energy usage while maintaining detectability through a structured control loop that tracks switch positions and mode states.
3Reliability
If the system disconnects individual battery groups from terminals, then the reliability during fault conditions is improved, but the device complexity increases
Solution Approach 1:
When a fault is detected in a battery group, the switch control module extracts (disconnects) the faulty group from the circuit by opening the associated switches, isolating the fault from the rest of the system. This protects the overall reliability by preventing fault propagation while the complexity is managed through automated fault detection and isolation logic in the control module.
4Adaptability or versatility
If multiple switches are used to control battery group connections, then the adaptability to different voltage levels is improved, but the ease of operation decreases
Solution Approach 1:
The switch control module automatically controls the switches based on the operating mode and capacity allotment requirements, eliminating the need for manual switch operation. The system serves itself by autonomously configuring the battery groups to achieve the desired voltage levels and capacity allocations, thereby improving ease of operation while maintaining adaptability through automated control logic.
Data Source
AI summary
A battery control system includes a battery including: first, second, and third terminals; a plurality of individual groups of two or more battery cells; and a plurality of switches configured to connect ones of the individual groups to and from ones of the first, second, and third terminals. A mode module is configured to set a mode to a first mode when a fault is present in a charging source of the battery. A switch control module is configured to control the plurality of switches based on a first predetermined capacity allotment when the mode is in the first mode.