Battery Histogram Data Integrity Validation
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Solution Overview
Problem
Current battery management systems lack effective methods to securely record and validate usage data for maintenance and service purposes, particularly in preventing tampering and ensuring accurate assessment of battery health and service life.
Innovation Solution
A method involving the recording and quantization of battery usage data, formation of histograms with frequency values, and calculation of checksums using one-way functions for validation, which are stored in non-volatile memory, allowing for decentralized validation and protection against data manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If usage data is recorded and stored in battery management systems, then maintenance and service assessment capability is improved, but data security and protection against manipulation deteriorate
Solution Approach 1:
The patent applies preliminary action by calculating checksums for usage data before storing them in non-volatile memory. The checksum is computed from the usage data using a one-way function, creating a validation mechanism that exists beforehand to prevent future manipulation. This proactive approach ensures data integrity without requiring complex real-time verification systems.
Solution Approach 2:
The patent introduces an intermediary element - the checksum calculated through a one-way function - that mediates between the usage data and its validation. This intermediary allows verification of data integrity without exposing the original data or requiring complex decryption mechanisms, thus maintaining security while enabling validation.
2Device complexity
If centralized storage of usage data is implemented, then data management is simplified, but system scalability and decentralization capability deteriorate
Solution Approach 1:
The patent applies segmentation by dividing the battery management system into multiple independent control units, each with its own non-volatile memory for storing usage data and checksums. This modular architecture allows each control unit to operate independently while maintaining standardized data structures, enabling system scalability without increasing overall management complexity.
Solution Approach 2:
The patent implements universality by creating a standardized histogram data structure and checksum validation mechanism that can be universally applied across different control units and battery configurations. This universal approach allows the same data management principles to work across centralized and decentralized architectures, providing adaptability without requiring complex specialized management systems.
3Measurement precision
If detailed usage data is recorded for accurate battery health assessment, then measurement precision is improved, but data manipulation risk and storage requirements deteriorate
Solution Approach 1:
The patent extracts only the essential usage parameters needed for battery health assessment into standardized histogram data structures. By selecting and recording only relevant parameters (such as temperature, voltage, current, and state of charge) rather than all possible data points, the system maintains measurement precision for critical factors while reducing overall data volume and associated storage and validation complexity.
Solution Approach 2:
The patent applies parameter changes by transforming continuous usage data into quantized histogram bins. This discretization of parameters allows for accurate trend analysis and battery health assessment while significantly reducing the storage requirements compared to recording every continuous data point, thus balancing precision with storage efficiency.
Data Source
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AI summary
The invention relates to a method for providing information for the purposes of maintaining and servicing a battery. The battery comprises a control unit, which has a non-volatile memory (18), and a plurality of battery units. The method comprises the following steps: a) detecting and quantizing usage data of the battery units; b) forming a histogram, which comprises frequency values of the occurrence of certain values of the individual quantized usage data or values derived therefrom; c) determining at least one additional information carrier (16), which is designed for a validity check of the histogram; and d) storing (S5) the histogram and the additional information carrier (16) in the non-volatile memory (18) of the control unit. The invention further relates to an additional method, which provides such information on decentralized modular control units in a manipulation-protected manner. The invention further relates to a data structure, a computer program, and a battery management system, which are designed for performing the method, to a battery, and to a motor vehicle, the drive system of which is connected to such a battery.