Vehicle Battery SOC Management for Deterioration Control
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Solution Overview
Problem
Hybrid vehicle batteries experience deterioration due to chemical degradation from charging and discharging, as well as neglect, requiring a management strategy to minimize additional deterioration by identifying the primary cause of degradation.
Innovation Solution
A vehicle system comprising a memory to store driving information, a battery to supply electrical energy, and a controller to manage the state of charge (SOC) of the battery based on usage characteristics, determining deterioration severity and adjusting SOC management ranges or central SOC values based on identified causes of deterioration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the battery is used for charging and discharging during vehicle driving, then the vehicle can operate effectively, but the battery experiences chemical degradation and deterioration
Solution Approach 1:
The patent implements dynamic SOC management that adjusts charging and discharging strategies based on real-time battery conditions, vehicle state, and environmental factors. The control unit dynamically modifies SOC ranges and charging/discharging rates to balance vehicle operation needs with battery protection, resolving the contradiction between maintaining productivity and preventing deterioration.
Solution Approach 2:
The system changes operational parameters by adjusting SOC management ranges, charging/discharging rates, and voltage thresholds based on battery state, temperature, and driving conditions. These parameter modifications allow the battery to operate effectively while minimizing chemical degradation through optimized charge/discharge cycles.
2Ease of operation
If the vehicle is left unattended for extended periods, then the battery may be neglected, but chemical degradation occurs due to lack of charging and discharging
Solution Approach 1:
The system performs preliminary actions by detecting when the vehicle will be left unattended and proactively adjusting SOC management before deterioration occurs. The control unit sets appropriate SOC ranges and may initiate maintenance charging cycles in advance, preventing chemical degradation due to neglect while maintaining ease of operation.
Solution Approach 2:
The patent implements feedback mechanisms that continuously monitor battery state, vehicle usage patterns, and environmental conditions. This feedback enables the system to automatically adjust SOC management strategies, detecting unattended states and responding with appropriate maintenance actions to prevent deterioration while preserving operational convenience.
3Device complexity
If a generic SOC management strategy is applied, then the system is simple to implement, but it cannot address different causes of battery deterioration effectively
Solution Approach 1:
The patent segments the deterioration problem by identifying and addressing different causes separately - distinguishing between deterioration from active use versus deterioration from neglect. The system applies different SOC management strategies for each deterioration cause, using segmentation to handle complexity while maintaining effectiveness in suppressing battery degradation.
Data Source
AI summary
A vehicle and method are provided in which deterioration of a battery is controlled. The method includes detecting deterioration severity of the battery and determining whether the deterioration severity is equal to or greater than a reference value. A cause of battery deterioration is determined when the deterioration severity is equal to or greater than the reference value. The method further includes determining whether the cause of the battery deterioration is vehicle driving and reducing an SOC management range of the battery when the cause of deterioration of the battery is charging/discharging due to vehicle driving. The deterioration cause of the battery is determined as a state of the vehicle left unattended and the central SOC of the battery is adjusted when the cause of deterioration of the battery is not charging/discharging due to vehicle driving.