Battery Module Authenticity Detection via Cell Displacement During Charging
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Solution Overview
Problem
Existing methods for determining whether a battery module is genuine, such as those based on weight, fail to accurately distinguish between genuine and non-genuine products when they have similar weights but differ in other characteristics.
Innovation Solution
A diagnostic system using a displacement detector to measure the displacement of electric cells during charging, with an electronic control unit determining authenticity based on displacement amount and slope, allowing for accurate identification of genuine products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If weight-based diagnosis is used to determine battery authenticity, then the diagnostic system is simple to implement, but it cannot accurately distinguish genuine from non-genuine products when weights are similar
Solution Approach 1:
The patent changes the diagnostic parameter from weight to displacement amount during charging. The displacement detector measures how much the battery pack moves vertically when electric cells are charged, which reflects internal structural characteristics. This parameter change enables accurate distinction between genuine and non-genuine products even when their weights are similar, as the displacement characteristics depend on internal structure rather than just mass.
2Measurement precision
If displacement measurement is used to determine battery authenticity, then the accuracy of genuine product identification is improved, but the device complexity increases
Solution Approach 1:
The patent replaces complex internal structural inspection with a simple mechanical displacement measurement system. Instead of using sophisticated sensors to examine battery internals, the system uses a displacement detector to measure the vertical movement of the battery pack during charging. This mechanical substitution achieves high measurement precision while keeping the diagnostic system relatively simple.
Solution Approach 2:
The battery pack's own charging process is utilized as the diagnostic mechanism. During normal charging, the electric cells expand and cause the battery pack to displace vertically. The system leverages this self-generated displacement phenomenon during routine charging operations, eliminating the need for separate diagnostic procedures or additional active components.
3Loss of time
If only weight is used as the diagnostic criterion, then the diagnostic process is quick and simple, but it fails to detect non-genuine products with similar weight but different characteristics
Solution Approach 1:
The diagnostic process occurs continuously during the normal charging operation. The displacement detector continuously monitors the battery pack's vertical position throughout the charging process, capturing the displacement characteristics without interrupting the charging flow. This continuous measurement during useful action maintains diagnostic reliability while minimizing time loss.
Solution Approach 2:
The system performs preliminary displacement measurements during initial charging to establish baseline characteristics. By capturing displacement data during the charging process before the battery is put into service, the system can quickly determine authenticity without requiring separate diagnostic sessions, thus reducing overall diagnostic time while maintaining reliability.
Data Source
AI summary
A diagnostic system for a battery module including a plurality of electric cells includes a displacement detector configured to detect a displacement of at least one of the electric cells during charging, and an electronic control unit configured to determine whether the battery module is a genuine product. The electronic control unit is configured to determine whether the battery module is the genuine product based on the displacement detected by the displacement detector.