Battery Temperature Data Correction via Inter-Vehicle Communication
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Solution Overview
Problem
The existing battery systems face challenges in accurately estimating the deteriorated state of secondary batteries due to abnormalities in temperature history data, leading to low estimation accuracy when the auxiliary battery is detached or not functioning, causing gaps in temperature data collection.
Innovation Solution
The battery system incorporates an electronic control unit that communicates with external devices to acquire and correct abnormal temperature values from other vehicles, supplementing missing data and substituting outliers using temperature history data from nearby vehicles with similar climate and weather conditions, thereby improving estimation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If temperature history data is used to estimate the deteriorated state of the secondary battery, then estimation can be performed, but abnormal values may be contained in the battery temperature data leading to low estimation accuracy
Solution Approach 1:
The patent introduces an intermediary data verification mechanism where the detection device acts as a mediator between the temperature history data and the estimation process. It identifies abnormal values in the temperature data and excludes them from the estimation calculation, thereby resolving the contradiction between using historical data for estimation and ensuring data quality reliability
Solution Approach 2:
The patent implements a feedback mechanism where the detection device continuously monitors the temperature history data, identifies abnormal values, and provides feedback to the estimation process by excluding these abnormal values. This feedback loop ensures that the estimation accuracy is maintained while accounting for data quality issues
2Ease of manufacture
If the auxiliary battery is detached for replacement or repair, then maintenance can be performed, but the estimation device stops operation causing loss of temperature history data
Solution Approach 1:
The patent applies preliminary action by having the detection device detect and flag potential data loss conditions before they affect the estimation accuracy. The system prepares for possible auxiliary battery detachment by having mechanisms in place to handle missing data, such as using available data up to the point of detachment or interpolating missing values
3Ease of operation
If the auxiliary battery is detached from the vehicle, then battery replacement or vehicle repair can be performed, but electric power is not supplied causing the estimation device to stop operation
Solution Approach 1:
The patent extracts the critical estimation function from the auxiliary battery-dependent system by implementing a detection device that can identify and handle periods when the auxiliary battery is detached. The system separates the data collection function from continuous operation requirements, allowing maintenance activities while preserving estimation capability through alternative means
Data Source
AI summary
A battery system is configured to be mounted on a vehicle. The battery system includes a secondary battery, a detection device, and an electronic control unit. The electronic control unit is configured to perform communication with an external device that accumulates temperature history data of other vehicle, and is configured to acquire, when the battery temperature of the temperature history data of the vehicle contains an abnormal value, the temperature history data of the other vehicle within a period in which the battery temperature of the temperature history data of the vehicle contains the abnormal value, from the external device, and execute correction of the abnormal value of the battery temperature based on the temperature history data acquired from the external device.