Vehicle Battery Discharge Control for High-SOC Durability
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Solution Overview
Problem
The durability of auxiliary batteries in vehicles is compromised due to lack of effective durability management, leading to reduced stability and increased risk of deterioration, especially when not used for extended periods at high state of charge (SOC) conditions.
Innovation Solution
A method of controlling the discharge of auxiliary batteries by monitoring SOC values and temperatures, optimizing discharge frequency and range, and determining discharge conditions based on non-operating time and temperature to prevent prolonged neglect and maintain battery stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the auxiliary battery is not discharged for extended periods while maintaining high SOC conditions, then the battery capacity is preserved for immediate use, but the durability and stability of the battery deteriorate
Solution Approach 1:
The controller performs periodic discharge control of the auxiliary battery based on non-operating time and temperature conditions. When the auxiliary battery remains in a high SOC state for extended periods, the controller automatically initiates discharge cycles to maintain battery stability and prevent deterioration, thereby resolving the contradiction between preserving capacity and ensuring durability.
2Reliability
If the auxiliary battery is discharged frequently to maintain durability, then the battery stability is improved, but the battery capacity available for vehicle operation is reduced
Solution Approach 1:
The controller dynamically adjusts discharge parameters including SOC thresholds, discharge capacity, and timing based on real-time monitoring of battery temperature, non-operating time, and state of charge. This adaptive parameter adjustment ensures discharge operations maintain battery stability while minimizing impact on available capacity for vehicle operation.
3Device complexity
If the auxiliary battery is discharged without considering temperature conditions, then the discharge process is simplified, but the battery durability is compromised due to inappropriate discharge conditions
Solution Approach 1:
The controller continuously monitors battery temperature and uses this feedback to determine appropriate discharge parameters. The discharge control strategy adapts based on temperature conditions, preventing discharge operations that could harm battery durability while maintaining a relatively simple control structure through rule-based decision logic.
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
This approach optimizes the SOC range and frequency of discharge for auxiliary batteries, thereby extending their lifespan and preventing deterioration caused by prolonged high SOC conditions, ensuring the stability and longevity of the batteries.
Implementation Method 1
vehicles that generate driving force from electrical energy are provided with a battery that stores and supplies electrical energy
Implementation Method 2
The auxiliary battery is implemented as a secondary battery which may be charged and discharged, and is charged using the main battery as required
Data Source
AI summary
In a method of controlling discharge of a battery in a vehicle that generates driving power using electric power to prevent deterioration of the durability of the battery and ensure the stability of the battery, a controller is configured to monitor the state of charge (SOC) value of a first battery configured to supply the electric power to a driving unit of the vehicle and an SOC value and a temperature of a second battery configured to charge the first battery. When the SOC value of the first battery reaches a predetermined first SOC value, the controller is configured to discharge the second battery and charges the first battery in response to the discharging of the second battery. When the SOC value of the second battery reaches the first SOC value, the controller ends the discharging of the second battery.