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Method, computer program, electronic storage medium and device for identifying defect

A technology of electric energy and equipment, which is applied in the field of identifying damage to backup electric energy equipment, computer programs, electronic storage media and devices, and can solve problems such as large capacitance tolerances

Pending Publication Date: 2022-08-02
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the manufacturing process, these electrolytic capacitors have a large capacitance tolerance

Method used

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  • Method, computer program, electronic storage medium and device for identifying defect

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Embodiment Construction

[0040] figure 1 A flow chart of one embodiment of the method 100 of the present invention is shown.

[0041] The method starts in a state in which the backup electrical energy device ER is charged to a predetermined target voltage level VER in order to operate the device for controlling the vehicle occupant protection device (airbag control unit).

[0042]In step 101, at least two backup electrical energy devices ER are charged to a predetermined target voltage V_TEST for capacity testing. The backup electrical energy device ER may be an electrolytic capacitor. The target voltage V_TEST for the capacity test may be, for example, 11V. The control of the charging can be carried out by the microcontroller μC of the airbag control unit. The μC can control the charging by means of the SPI (Serial Peripheral Interface) by transmitting corresponding control commands to the charging circuit for charging the backup energy device ER.

[0043] In step 102, before the actual capacity ...

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Abstract

The invention relates to a method (100) for detecting a damage to one of at least two backup electrical energy devices of a device for vehicle occupant protection, comprising the following steps: charging (101) the at least two backup electrical energy devices to a test voltage level (VTest); determining (102) ambient temperatures of the at least two backup electrical energy devices; detecting (103) the (total) capacity of the at least two backup electrical energy devices; identifying (104) a damage to the backup electrical energy device as a function of a smooth average value of the (total) capacity dependent on the determined ambient temperature and the detected (total) capacity; the smoothing average value is updated (105) as a function of the determined ambient temperature and the detected (total) capacity.

Description

technical field [0001] The present invention proposes a method, a computer program, an electronic storage medium and a device for identifying a failure of one of at least two backup power devices of a device for vehicle occupant protection. Background technique [0002] DE 37 44 524 A1 discloses a method for testing the availability of backup electrical energy equipment of a device for controlling the protection of vehicle occupants. [0003] Here, in order to check the capacity of the backup power device (capacitor), the backup power device is changed from the first voltage value (U S1 ) starts with a constant discharge current (I K ) to a predetermined second voltage value (U S2 ). Measure the discharge time (t E ). in the charging resistor (R E ) is known, the current capacity of the backup power equipment can be calculated according to the measured value. [0004] The device for controlling the vehicle's occupant protection system (airbag system) is designed so th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/26B60R21/017G01R31/00G01R31/64G01R31/01
CPCG01R31/64G01R27/2605G01R31/006B60R21/0173G01R31/007
Inventor F·格拉西H·舒马赫C·威尔克C·利斯特
Owner ROBERT BOSCH GMBH
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