Replaceable Battery Control for Balanced SOC and Swap Planning
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Solution Overview
Problem
Existing systems for electric vehicles with replaceable batteries may result in power imbalances due to uneven battery capacity distribution, leading to potential deficiencies or excesses across the vehicle.
Innovation Solution
A controller that manages a plurality of replaceable batteries by connecting them in parallel, acquires information from replacement stations and the vehicle's current position, calculates required battery consumption, and determines the optimal number and state of charge (SOC) to ensure sufficient battery capacity throughout the vehicle's journey.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If battery replacement is performed based on simple remaining amount thresholds, then replacement operations are simplified, but power imbalances and capacity deficiencies occur in the vehicle
Solution Approach 1:
The control unit continuously monitors the remaining amounts of multiple replaceable batteries and uses this feedback information to dynamically determine replacement priorities and targets. The system calculates the difference between average remaining amount and individual battery remaining amounts, using this feedback to identify which batteries need replacement to maintain power balance across the vehicle.
Solution Approach 2:
The system performs preliminary calculations of power requirements, travel routes, and battery replacement strategies before actual battery depletion occurs. By predicting future power needs and calculating optimal replacement targets in advance, the system prevents power imbalances before they affect vehicle operation.
2Reliability
If multiple replaceable batteries are used to ensure sufficient power, then power supply reliability is improved, but uneven capacity distribution causes some batteries to be underutilized while others deplete
Solution Approach 1:
The system dynamically adjusts battery replacement strategies based on real-time remaining amount data. Instead of fixed replacement rules, the control unit continuously recalculates replacement priorities by comparing individual battery states against the average, creating a dynamic balancing mechanism that adapts as batteries are used and replaced.
Solution Approach 2:
The system applies different replacement priorities to different batteries based on their individual remaining amounts. Batteries with remaining amounts below the average are prioritized for replacement, while those above average are retained longer. This local differentiation ensures that each battery is utilized optimally according to its current state, preventing both underutilization and premature depletion.
3Reliability
If battery replacement frequency is increased to maintain capacity, then power sufficiency is ensured, but operational time and efficiency are reduced
Solution Approach 1:
The system performs partial replacements only when necessary to maintain power balance, rather than replacing all batteries on a fixed schedule. By calculating the specific number of batteries needed to maintain the average remaining amount threshold, the system avoids unnecessary replacements and maximizes operational time between service intervals.
Data Source
AI summary
A controller for a plurality of replaceable batteries includes a controller for varying an overall battery capacity by connecting the exchangeable batteries in parallel in a vehicle mounting the exchangeable batteries. Further, the controller acquires, from a replacement battery station, information including at least remaining amounts of the replaceable batteries that the replacement battery station has, calculates consumed SOC when the vehicle travels from a current position of the vehicle to the replacement battery station based on the current position of the vehicle and a position of the replacement battery station, determines a replacement number and a target SOC of the replaceable batteries based on the calculated consumed SOC, remaining amounts of the replaceable batteries in the replacement battery station, and remaining amounts of the replaceable batteries mounted on the vehicle, and control the replaceable batteries to satisfy the determined replacement number and the target SOC.