Battery Charging Control with Failsafe Sensor Abnormality Handling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional charging control systems face difficulties in properly charging batteries when the battery sensor is operating abnormally, leading to unreliable detection results and potential battery power depletion.
Innovation Solution
A control apparatus that executes failsafe control to prioritize battery charging regardless of abnormal sensor readings, followed by full charging to ensure the battery is fully charged, and then reverts to normal charging control with a corrected state-of-charge value to maintain accurate charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If charging control is performed based on detection results from a battery sensor, then charging efficiency is improved, but reliability deteriorates when the sensor operates abnormally
Solution Approach 1:
The control apparatus performs preliminary determination of sensor abnormality before executing charging control. By detecting whether the battery sensor is operating normally in advance, the system can switch to alternative charging strategies (ignoring sensor data) when abnormality is detected, thus preventing unreliable sensor readings from compromising charging reliability while maintaining efficient sensor-based control under normal conditions
2Reliability
If failsafe control is executed to prioritize battery charging regardless of sensor readings, then reliability is improved, but charging precision deteriorates
Solution Approach 1:
The control apparatus dynamically adjusts charging strategy based on sensor status. When the battery sensor is determined to be operating normally, the system executes normal charging control that prioritizes charging precision by utilizing sensor detection results. When abnormality is detected, the system switches to failsafe control that prioritizes reliability by ignoring sensor readings. This dynamic switching resolves the contradiction by adapting the control approach to current sensor conditions
Solution Approach 2:
The control apparatus changes the parameter of sensor data utilization based on sensor operational status. In normal mode, sensor readings are fully utilized for precise charging control. In failsafe mode, the system changes the parameter by disregarding sensor readings entirely and charging based on predetermined criteria, thus maintaining reliability while accepting reduced precision until sensor functionality is restored
3Productivity
If normal charging control is resumed after failsafe control, then productivity is improved, but state-of-charge accuracy deteriorates
Solution Approach 1:
Before resuming normal charging control after failsafe control, the control apparatus performs a preliminary correction by setting the state-of-charge value to a predetermined value (e.g., 100% or a safe threshold). This preliminary action ensures that subsequent charging control based on sensor readings starts from an accurate reference point, preventing cumulative errors while enabling productive sensor-based charging to resume
Data Source
AI summary
A control apparatus of a power supply system including a battery, a battery sensor to detect a state quantity of the battery, and a generator to generate a power for the battery includes a controller. The controller executes normal charging control to control battery charging based on a detection result from the battery sensor, by controlling an operation of the generator. The controller executes failsafe control to prioritize battery charging regardless of the detection result from the battery sensor, if the battery sensor is determined to be operating abnormally. The controller executes full charging control to charge the battery until the battery is fully charged, when the failsafe control ends. The controller executes the normal charging control after a state-of-charge of the battery used in the normal charging control is set to a value corresponding to a state where the battery is fully charged, when the full charging control ends.