A control method and device based on a power distribution box supporting bidirectional DC voltage conversion

Abstract

The invention discloses a control method and device based on a power distribution box supporting bidirectional DC voltage conversion, which includes waking up the vehicle network through one-key startup when the vehicle is in sleep; judging whether the integrated power unit is Insulation, if so, control the bidirectional DC voltage conversion device to enter the boost working mode; in the boost mode, pre-charge the bus capacitor, and issue a command to complete the pre-charge through the integrated power unit; The integrated power unit issues a pre-charging completion command; when receiving the pre-charging completion command, it sends a request to enter the step-down mode, and when the high-voltage side voltage is detected, the bidirectional DC voltage conversion device is controlled to start the step-down mode; after the step-down mode is completed, pass The vehicle controller sends a shutdown command, receives the shutdown command through a bidirectional DC voltage conversion device and enters a shutdown state until it goes to sleep. The invention has the advantage of being able to effectively improve the working efficiency of bidirectional DC voltage conversion.

Description

technical field [0001] The invention relates to the field of automobile chassis safety, in particular to a control method and device based on a power distribution box supporting bidirectional DC voltage conversion. Background technique [0002] With the development of vehicle technology, the power source of the car is gradually converted from chemical energy to electric energy. It is a very important part of the power system. One of its important functions is to provide the required power for the power steering system, air conditioner and other auxiliary equipment. Power output, the role of stabilizing the bus voltage. [0003] The normal operation of traditional power distribution products and DCDC products is: firstly close the high-voltage main circuit, and then perform pre-charging. After the pre-charging is completed, the high-voltage circuit is responsible for the normal operation of the equipment. The specific working strategy is as follows: [0004] When the vehicl...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is that the normal operation of traditional power distribution products and DCDC products is to first attract the high-voltage main circuit and then perform pre-charging. After the pre-charging is completed, the high-voltage circuit is responsible for the normal operation of the equipment, but the pre-charging function requires The cost of electronic components is high, and a control method and device based on a power distribution box supporting bidirectional DC voltage conversion is provided. The control method based on a power distribution box supporting bidirectional DC voltage conversion includes:

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