Dual Battery Charge Control for Electric Vehicle Power Supply
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Solution Overview
Problem
Existing electric motor vehicles face challenges in maintaining high energy density battery health when not frequently used, as they do not receive adequate charge cycles, leading to premature deterioration.
Innovation Solution
An electric power supply system comprising a high capacity battery and a high output battery, with a charge control device that determines and prioritizes charging based on user input, ensuring both batteries reach target residual capacities by the scheduled use start time, and employs temperature management to optimize performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If the high energy density battery is not frequently used for travelling, then the battery longevity is extended, but the battery deteriorates prematurely due to lack of charge cycles
Solution Approach 1:
The high energy density battery serves itself by performing charge cycles through the power transfer step, where it charges the high output density battery even when not used for travelling. This self-service mechanism maintains battery health without requiring external intervention or frequent vehicle operation.
Solution Approach 2:
The system performs preliminary charging actions by transferring power from the high energy density battery to the high output density battery before the vehicle is needed. This preliminary action ensures both batteries maintain proper charge levels and health, preventing deterioration from idle time.
2Speed
If the high output density battery is charged first from external power source, then the vehicle is ready for immediate use, but the high energy density battery may be depleted before charging
Solution Approach 1:
The system performs preliminary power transfer from the high energy density battery to the high output density battery before external charging begins. This ensures the high output density battery is partially charged and ready for immediate vehicle use, while the high energy density battery retains sufficient capacity for subsequent charging.
Solution Approach 2:
The dual-battery system enables continuous useful action by allowing the high energy density battery to supply power to the high output density battery while simultaneously receiving charge from the external power source. This continuous operation maintains both batteries in optimal charge states without interruption.
Data Source
AI summary
An electric power supply system includes a first power storage, a second power, an input, and a processor. Information including priority information is to be input through the input. The processor is configured to determine whether the first power storage is charged up to a first target residual capacity and the second power storage is charged up to a second target residual capacity by a timing at which at least one of the first power storage and the second power storage starts discharging. The processor is configured to charge either one of or both of the first power storage and the second power storage according to the priority information when it is determined that the first power storage is not charged up to the first target residual capacity and/or the second power storage is not charged up to the second target residual capacity by the timing.