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Power failure protection circuit and protection method

A technology of power-down protection and circuit, which is applied in the field of power-down protection circuit and protection, and can solve problems such as short circuit, positive line of power line falling off, etc.

Pending Publication Date: 2022-01-18
深圳市卡贝电子技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of operation, there is a possibility that the positive pole of the power cord and the positive pole of the car will fall off or accidentally let the positive pole of the power cord touch the metal on the frame to cause a short circuit

Method used

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  • Power failure protection circuit and protection method

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Embodiment Construction

[0048] In order to make the purpose, technical solutions and advantages of this application clearer, the following in conjunction with the attached Figure 1-3 And embodiment, this application is described in further detail. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

[0049] The embodiment of the present application discloses a power failure protection circuit.

[0050] refer to figure 1 , as an implementation of a power-down protection circuit, a power-down protection circuit includes a first port VCC_1, a second port GND, a capacitive energy storage module 1, a first switch control module 2, a protection module 10, and an MCU module , the second switch control module 3, the first voltage detection module 4 and the current detection module.

[0051] The first port VCC_1 is used to connect with the positive pin of the normal power supply of the OBD, and the posit...

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PUM

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Abstract

The invention relates to a power failure protection circuit and a protection method, and relates to the field of electronic circuits. The power failure protection circuit comprises a first port VCC1, a second port GND, a capacitive energy storage module, a first switch control module, an MCU module, a second switch control module, a protection module, a first voltage detection module and a current detection module, wherein an MCU chip controls a duty ratio of a PWM signal based on a first voltage detection value and a current detection value, and adjusts the magnitude of the current flowing through the capacitive energy storage module. The power failure protection circuit has the effect of conveniently storing the RAM data of a trip computer when an original storage battery of an automobile is replaced.

Description

technical field [0001] The present application relates to the field of electronic circuits, in particular to a power-down protection circuit and protection method. Background technique [0002] After a long-term use of electric vehicles, the battery will age, so the original battery needs to be replaced. When the original battery of the car is disassembled, the data stored in the ROM by the ECU (Electronic Control Unit) will not be lost; Data loss occurs when the battery is removed. Usually, after replacing the original battery, the failure phenomena caused by the loss of RAM data due to power failure include: clock confusion, loss of record of a key-up window (loss of glass position), car image lock and engine anti-theft lock, etc. [0003] In the related technology, the wiring method is adopted when replacing the original storage battery, which requires suitable power supply and cables near the place where the original storage battery is replaced. When replacing the ori...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165H02H7/20H02J7/34H02H9/02
CPCG01R19/16528G01R19/16542H02H7/205H02J7/345H02H9/02
Inventor 谢宗营谢宗艺
Owner 深圳市卡贝电子技术有限公司
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