Battery Control Unit Tamper Detection via Light Sensing
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Solution Overview
Problem
Rechargeable battery systems face unauthorized manipulation and tampering, which can lead to reduced lifespan and energy loss, as well as difficulty in detecting such alterations, as they can be opened and their internal components altered or reversed engineered, compromising safety and performance.
Innovation Solution
A control unit with an access detection circuit featuring a light-sensitive element within the battery module's housing, which outputs a signal when light intensity exceeds a threshold, altering the control module's state to disable or enable functions, including setting a fuse non-conductive to prevent unauthorized access and manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of repair
If the battery system housing is made accessible for maintenance and analysis, then ease of repair and manufacturing are improved, but unauthorized manipulation and tampering become possible, compromising safety and performance
Solution Approach 1:
The patent applies preliminary action by implementing a light-sensitive element and access detection circuit before any unauthorized access can occur. When the housing is opened (allowing maintenance access), the light-sensitive element detects the incoming light and triggers the access detection circuit to generate a signal that alters the control module's state, disabling critical functions before tampering can take place. This preventive mechanism resolves the contradiction by enabling easy access for authorized maintenance while automatically protecting against unauthorized manipulation.
2Reliability
If the control module state is altered to prevent unauthorized access, then reliability and safety are improved, but legitimate maintenance and repair operations are hindered
Solution Approach 1:
The patent implements feedback through the access detection circuit that continuously monitors the housing state via the light-sensitive element. When opening occurs, the circuit generates an access detection signal that feeds back to alter the control module's state. The system provides differentiated outcomes: authorized personnel can perform maintenance and then restore functionality through proper procedures, while unauthorized users face permanent disabling. This feedback mechanism resolves the contradiction by protecting reliability while allowing legitimate repair operations.
3Reliability
If a light-sensitive access detection system is implemented, then protection against unauthorized access is improved, but device complexity increases
Solution Approach 1:
The patent uses a light-sensitive element as an intermediary between the physical act of opening the housing and the electronic response in the control module. This intermediary converts the mechanical action of opening into an optical signal that the access detection circuit can process, triggering the appropriate state change. This intermediary approach resolves the contradiction by providing reliable access detection through a simple optical mechanism rather than complex sensors or monitors, minimizing added system complexity while maintaining high reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively detects and prevents unauthorized access, ensuring the battery system's integrity and safety by disabling critical functions when the housing is opened, thereby protecting against tampering and enhancing user safety.
Implementation Method 1
an access detection circuit connected to the control module and comprising a light-sensitive element within the housing
Data Source
AI summary
A controller is for controlling a battery module including a plurality of battery cells in a housing. The controller includes a control module to perform at least one control function with respect to at least one of the plurality of battery cells; and an access detection circuit including a light sensitive element in the housing. The access detection circuit is to output an access detection signal when a light intensity in the housing is greater than a predetermined threshold. The controller is to alter a state of the control module in response to the access detection signal.