Battery Control Unit Secure Activation Key Verification
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Solution Overview
Problem
Existing battery control units, such as BMS, BMU, and CSC, have a limited service life that often exceeds that of the battery cells they manage, leading to risks of malfunctions, fires, and the release of harmful substances when reused with replacement cells, prompting a need for controlled reuse mechanisms.
Innovation Solution
A control unit for battery systems that includes a power input from a battery cell, a control module, and a startup module with a verification circuit and non-volatile memory for validating an activation key against a security identifier, ensuring the control module is only activated with a valid key, thus enabling secure and controlled operation throughout the battery system's life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If control units are reused with replacement battery cells, then the service life of control units is extended, but the risk of malfunctions, fires, and harmful substance release increases
Solution Approach 1:
The patent applies preliminary action by implementing a startup sequence that requires verification of an activation key before the control module becomes operational. This pre-activation verification ensures that only properly authorized control units can be activated with replacement battery cells, preventing unsafe configurations before they can cause malfunctions or safety incidents.
Solution Approach 2:
The patent introduces an intermediary mechanism in the form of an activation key verification system that mediates between the control unit and the battery cells. This intermediary layer validates compatibility and authorization before allowing the control unit to manage the battery system, thereby maintaining safety while enabling reuse.
2Duration of action of stationary object
If control units are designed with extended service life, then reuse becomes possible, but coordination with original battery cells becomes problematic
Solution Approach 1:
The patent applies local quality by implementing specific verification mechanisms within the startup sequence that address compatibility concerns locally at the activation stage. Rather than requiring complete redesign for different battery configurations, the solution focuses the adaptability requirement on the key verification process, allowing the control unit to maintain its extended service life while ensuring proper coordination with various battery cell types through targeted validation.
3Reliability
If activation key verification is implemented, then controlled reuse is enabled, but device complexity increases
Solution Approach 1:
The patent extracts the verification logic as a distinct functional component within the control unit's startup sequence. By separating the activation key verification from the core control functions, the implementation adds minimal complexity only where needed for safety validation, while keeping the main control module simple and focused on its primary battery management functions.
Data Source
Figure 1(A)~2
Figure 3~4
AI summary
The present invention relates to a control unit (10) for a battery system (100), comprising a power input (11) for an operation voltage of the control unit (10) provided by at least one battery cell (80); a control module (13) configured for performing at least control function with respect to the at least one battery cell (80); and a startup module (12) connected between the power input (11) and the control module (13). According to the present invention, the startup module comprises: a data input (14) configured for receiving an activation key; a non-volatile memory element (15) storing a security identifier; a verification circuit (16) connected to the data input (14) and to the non-volatile memory element (15) and configured for validating an input activation key with respect to the security identifier; and an activation circuit (17) connected to the verification circuit (16) and configured for interconnecting the power input (11) and the control module (13) in response to the validation of the activation key. The present invention further relates to a battery system (100) comprising a control unit (10) according to the invention and to a startup method of a control unit (10) for a battery system (100).