Battery SOH Verification During External Charging
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Solution Overview
Problem
Existing vehicle management systems fail to account for the possibility of tampered history data on power storage devices, leading to inaccurate determination of battery reuseability.
Innovation Solution
A vehicle management method that compares first SOH information obtained during external charge with second SOH information derived from recorded history data to detect tampering, using parameters like capacity retention rate and internal resistance, and determines the authenticity of the history data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If history data about power storage device deterioration is recorded and used for determining battery reuseability, then the determination can be made based on accumulated data over time, but the history data may be tampered with leading to incorrect determination
Solution Approach 1:
The system obtains first SOH information during external charge and compares it with second SOH information derived from history data. This feedback mechanism allows the system to detect discrepancies between actual battery state and recorded history, thereby identifying tampered data and ensuring reliable battery reuseability determination
Solution Approach 2:
The system performs tampering detection by comparing SOH information before finalizing the battery reuseability determination. By conducting this verification in advance, the system prevents incorrect decisions based on tampered history data
2Reliability
If first SOH information is obtained during external charge to verify history data, then tampering can be detected, but the vehicle must be connected to external charge infrastructure which is not always available
Solution Approach 1:
The system performs tampering detection periodically whenever external charge opportunities arise. Instead of requiring continuous connection, the system utilizes available charge moments to obtain first SOH information and compare it with history data, making the verification process practical and operational
3Reliability
If the system compares first SOH information from external charge with second SOH information from history data, then tampering can be detected, but additional measurement and comparison processes increase system complexity
Solution Approach 1:
The system utilizes the external charge process itself to generate first SOH information that can be compared with history data. The charge process serves dual purposes: charging the battery and providing verification data, thereby reducing the need for separate measurement systems and minimizing additional complexity
Data Source
AI summary
A vehicle management method includes: obtaining first SOH information that indicates a degree of deterioration of a power storage device of a vehicle based on charge data on the power storage device measured while the vehicle is executing external charge of the power storage device using power supplied externally; obtaining second SOH information that indicates the degree of deterioration of the power storage device based on history data about deterioration of the power storage device recorded in the vehicle when the vehicle is not executing external charge of the power storage device; and determining whether the history data have been tampered with by comparing the first SOH information and the second SOH information.