In-Vehicle Battery Sensor Calibration via Direct Service Tool Testing
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Solution Overview
Problem
Existing in-vehicle battery sensors lack a verification process to ensure programmed parameters match the actual battery, leading to errors in state of charge and state of health calculations, especially when batteries are replaced, and are complicated by varying manufacturer protocols and inaccurate algorithms.
Innovation Solution
A service tool that performs a battery test and programs the sensor directly, allowing for accurate calibration and implementation of improved algorithms, independent of OBDII communication, ensuring correct parameter programming and reducing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If in-vehicle battery sensors are programmed using existing techniques, then the programming process can be completed, but the programmed parameters may not match the actual battery characteristics, leading to calculation errors
Solution Approach 1:
The service tool performs a battery test before programming the sensor to determine actual battery characteristics. This preliminary action ensures that the parameters programmed into the sensor accurately match the specific battery being monitored, preventing calculation errors and improving reliability.
Solution Approach 2:
The system incorporates a verification process where the service tool compares the programmed sensor output against actual battery measurements. This feedback mechanism ensures parameter accuracy and allows for correction if discrepancies are detected, thereby improving both measurement precision and calculation reliability.
2Measurement precision
If a verification process is implemented to ensure programmed parameters match actual battery, then calculation accuracy improves, but the programming process becomes more complex
Solution Approach 1:
The service tool combines the battery testing function and the sensor programming function into a single integrated device. This merging eliminates the need for separate verification steps and manual parameter entry, simplifying the overall process while maintaining high accuracy through automated parameter determination.
Solution Approach 2:
The service tool automatically determines battery characteristics through testing and programs the sensor without requiring manual intervention for parameter entry. This self-service approach reduces programming complexity while ensuring accurate parameter matching between the sensor and actual battery.
3Measurement precision
If service tool directly programs the sensor independent of OBDII communication, then programming accuracy improves, but the system loses compatibility with vehicle-specific protocols
Solution Approach 1:
The service tool is designed to work with multiple battery types and sensor models through a universal interface. It determines battery characteristics through direct testing rather than relying on vehicle-specific protocols, making it adaptable to different applications while maintaining high programming accuracy through standardized measurement and programming procedures.
Data Source
AI summary
An in-vehicle battery sensor includes a sensor configured to couple to a storage battery. A memory is configured to store calibration information. An input receives calibration information which is saved in the memory. A controller performs a battery test on the storage battery using the sensor output and the stored calibration information.