Sub-Battery Capacity Measurement Under Low-Temperature Backup Constraints
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing methods for measuring the full charge capacity of a sub-battery, which is used for backup power in an autonomous driving system, are not suitable as they require discharging the battery to a low State Of Charge (SOC) and recharging to a high SOC, which cannot be easily applied while maintaining the necessary storage rate for backup power supply.
Innovation Solution
A full charge capacity measuring device that acquires the sub-battery's temperature and determines if it is below the lower limit temperature for autonomous driving operation, allowing measurement control only at low temperatures where the system does not operate, thereby maintaining the required storage rate for backup power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sub-battery is discharged to low SOC and recharged to high SOC for full charge capacity measurement, then the full charge capacity can be measured, but the storage rate needed for backup power supply cannot be maintained
Solution Approach 1:
The patent changes the temperature parameter of the sub-battery to enable measurement. By controlling the sub-battery temperature to be below a predetermined threshold (e.g., 10°C), the system creates conditions where the autonomous driving system does not operate, allowing safe discharge and recharge cycles for capacity measurement without compromising backup power readiness at normal operating temperatures
Solution Approach 2:
The patent dynamically adjusts the measurement process based on temperature conditions. The control unit monitors temperature continuously and only initiates discharge/recharge cycles when the temperature condition is met, making the measurement process adaptive to real-time thermal conditions while maintaining backup readiness during normal operations
2Reliability
If the sub-battery maintains high storage rate for backup power supply, then backup readiness is ensured, but full charge capacity cannot be measured using conventional discharge-recharge methods
Solution Approach 1:
The patent introduces temperature as a controlling parameter to enable measurement. By lowering the temperature below a threshold value, the system temporarily creates measurement opportunities without affecting backup readiness at normal temperatures, as the autonomous driving system remains inactive at low temperatures
Solution Approach 2:
The patent performs preliminary temperature reduction before initiating capacity measurement. By pre-cooling the sub-battery below the threshold temperature, the system ensures that subsequent discharge and recharge operations will not trigger autonomous driving system operation, thereby safely enabling measurement while preserving backup readiness
Data Source
AI summary
The full charge capacity measuring device is a full charge capacity measuring device that measures a full charge capacity of a sub-battery provided for backup of a main battery that supplies electric power to an automatic operation system. The full charge capacity measuring device includes an acquisition unit that acquires a temperature of the sub-battery, a determination unit that determines whether or not the current temperature of the sub-battery is less than a lower limit temperature at which the automatic operation system can operate, and a measurement control unit that performs measurement control of the full charge capacity of the sub-battery when the current temperature is less than the lower limit temperature.