EV Battery Contactor Safety Device with Electronic Verification
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Solution Overview
Problem
The replacement of individual electrical components of secondary batteries in electric vehicles by unauthorized persons can lead to environmental damage and defects, such as flashovers or long-term overloading, due to improper handling or mismatched components.
Innovation Solution
A safety device with an electronic evaluation unit connected to the secondary battery's electrical components via a communication channel, which compares component-specific actual information with stored target information to control a safety switch, ensuring only authorized components are used by maintaining the contactor's electrical control circuit integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an electronic evaluation unit with communication connection is added to verify component information, then component authenticity and safety are improved, but device complexity increases
Solution Approach 1:
The patent introduces an electronic evaluation unit as an intermediary component that mediates between the battery components and the control system. This evaluation unit communicates with battery components via communication connections, verifies their authenticity by comparing actual information with target information, and controls the contactor accordingly. This intermediary approach enables comprehensive verification while maintaining a modular system structure.
2Reliability
If a safety switch controlled by electronic evaluation is implemented, then unauthorized replacement is prevented, but the control circuit complexity increases
Solution Approach 1:
The patent implements preliminary verification of component authenticity through the electronic evaluation unit before allowing the contactor to operate. The evaluation unit compares actual information from battery components with stored target information in advance, and only permits contactor activation when verification succeeds. This preliminary action prevents unauthorized replacements from causing harm while maintaining a relatively simple control circuit structure.
3Reliability
If component information verification is performed before contactor operation, then battery safety is improved, but system response time increases
Solution Approach 1:
The system performs preliminary verification of component authenticity through the electronic evaluation unit before contactor operation is permitted. The evaluation unit compares actual information from battery components with stored target information in advance, ensuring safety before activation. This preliminary action prevents unauthorized replacements from causing harm while maintaining a relatively simple control circuit structure.
Solution Approach 2:
The electronic evaluation unit establishes feedback loops with battery components through communication connections, continuously monitoring component status and authenticity. The system receives feedback from components, verifies their identity against stored target information, and adjusts contactor operation accordingly. This feedback mechanism enables real-time safety verification with minimal impact on system response time.
Data Source
AI summary
The invention relates to a safety device (4) for a contactor (2) connected between a secondary battery and an electrical power network, in particular of a motor vehicle that can be driven electrically, comprising at least one electronic evaluating unit (6), which can be connected to at least one electrical component of the secondary battery by means of a communication connection (5), and at least one safety switch (8), which can be controlled by means of the electronic evaluating unit (6) and which can be arranged in an electrical control circuit (7) of the contactor (2), wherein the electronic evaluating unit (6) is designed to receive at least one component-specific piece of actual information (12) from the electrical component via the communication connection (5), to compare the received piece of actual information (12) with at least one piece of target information stored in the electronic evaluating unit (6), and to control the safety switch (8) in dependence on a result of the comparison in such a way that the electronic evaluating unit closes the safety switch (8) if the piece of actual information (12) corresponds with the piece of target information and opens the safety switch (8) if the piece of actual information (12) does not correspond with the piece of target information.