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DC/DC control method

A control method and a technology of a control module, which are applied in control/regulation systems, output power conversion devices, DC power input conversion to DC power output, etc., can solve the problem of not giving the output current threshold, not providing overload power demand, Lack of problems such as dynamic adjustment process to achieve flexible switching and solve the effect of output over-current protection

Active Publication Date: 2021-05-07
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For non-low-voltage power management, this solution and similar patents lack the dynamic adjustment process between voltage levels, and do not give a clear and specific output current threshold
(2) Patent No. 201410520608.7 provides a DC / DC control system and method for a 48V automotive system, and describes a low-voltage power management control method for a 48V lithium battery under different power levels, but this patent and similar patents do not Provide DC / DC under low-voltage power supply management, when there is a low-voltage instantaneous overload power demand, how does DC / DC work, and there is a problem of DC / DC output overcurrent protection

Method used

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Embodiment 1

[0022] This embodiment provides a DC / DC control method, wherein the DC / DC includes a power module 1 , a control module 2 and an output current monitoring and comparison module 3 .

[0023] When the control module 2 of the DC / DC receives the enabling work command sent by the whole vehicle through the CAN, it starts to enter the working state. The control module 2 judges whether the entire vehicle sends a low-voltage power supply management instruction signal, that is, an output voltage request instruction.

[0024] If the output voltage request command is not received, the DC / DC enters the non-low voltage power supply management mode; if the control module 2 receives the vehicle output voltage request command, it will output according to the output voltage request value, and at the same time through the output current monitoring and comparison module 3 Monitor and compare the output current value.

[0025] Such as figure 2 As shown, the output current monitoring and comparis...

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Abstract

The invention discloses a DC / DC control method. When the DC / DC control module receives the enabling work instruction sent by the whole vehicle through CAN, it starts to enter the working state; the control module judges whether the whole vehicle sends a low-voltage power supply at this time Management command signal; if the output voltage request command is not received, the DC / DC will enter the non-low voltage power supply management mode; if the control module receives the vehicle output voltage request command, it will output according to the output voltage request value, and at the same time through the output current monitoring and The comparison module monitors and compares the output current value. The DC / DC control method of the present invention, through the output characteristic curve, realizes the one-to-one correspondence between the output voltage and the output current of the DC / DC in the non-low-voltage power supply management mode, so that the DC / DC is always in the dynamic adjustment process; at the same time, the new The output current monitoring and comparison module is added to realize the flexible switching of DC / DC in low-voltage power management mode and non-low-voltage power management mode, which can solve the problem of DC / DC output overcurrent protection.

Description

technical field [0001] The invention relates to the technical field of new energy vehicle control, and relates to a DC / DC control technology for new energy vehicles. Background technique [0002] With the rapid economic development, coal, oil, natural gas and other non-renewable resources are consumed in large quantities, resulting in increasingly serious air pollution and severe damage to the natural ecological environment. As a synonym for energy conservation and environmental protection, new energy vehicles have received widespread attention in recent years, and the new energy vehicle industry is now in a stage of vigorous development. [0003] As an important new component of new energy vehicles, DC / DC converts the high-voltage battery high-voltage electricity into low-voltage direct current, supplies power to the low-voltage electrical system of the vehicle, and charges the low-voltage battery at the same time. Its role replaces the traditional car generator. It can be ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/157
Inventor 刘健张天强
Owner CHINA FIRST AUTOMOBILE