Method for diagnosing at least one supercapacitor

CN122249737APending Publication Date: 2026-06-19KIEKERT AG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
KIEKERT AG
Filing Date
2024-11-22
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

In electronically actuated door locks of motor vehicles, the electrolyte in the supercapacitor may dry out, causing the door to fail to open properly in an emergency. Existing technologies make it difficult to conveniently and cost-effectively diagnose and assess its functional status in vehicles.

Method used

By measuring voltage and current under no-load and loaded conditions of supercapacitors, a functional relationship is established, diagnostic values ​​are determined, and compared with reference values ​​to assess their remaining service life. Real-time diagnostics are performed using a microcontroller and analog-to-digital converter.

Benefits of technology

It enables rapid and accurate assessment of the functional status and remaining lifespan of supercapacitors inside motor vehicles, allowing for diagnostics without disassembling the equipment, thus improving the reliability of door opening in emergency situations.

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Abstract

This invention relates to a method for diagnosing at least one supercapacitor (3) configured to actuate an electronically actuated door lock (2) of an electric vehicle (8). The method includes the following steps: measuring the no-load voltage and no-load current of the at least one supercapacitor (3) under no-load conditions; measuring the on-load voltage and on-load current of the at least one supercapacitor (3) during discharge; establishing a functional relationship between the no-load voltage, no-load current, on-load voltage, and on-load current; and determining a diagnostic value based on the functional relationship. This provides a simple, low-cost, and reliable solution for diagnosing supercapacitors in electronically actuated door locks.
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