CN112838652A

CN112838652A - Emergency starting control circuit of DC/DC power supply

Info

Publication number: CN112838652A
Application number: CN202110338677.6A
Authority: CN
Inventors: 张家书; 冯鹏辉; 刘亚峰; 黄昆; 张伟强; 李庆隆; 梁学超; 马帅帅
Original assignee: Luoyang Grasen Power Technology Co ltd
Current assignee: Luoyang Grasen Power Technology Co ltd
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2021-05-25

Abstract

The invention provides an emergency starting control circuit of a DC/DC power supply, which comprises: the power supply circuit comprises a low-power consumption circuit, an MCU controller, an MCU power supply circuit, a start enabling circuit, an auxiliary power supply wake-up circuit, an auxiliary power supply closing circuit and a power conversion circuit; the low-power consumption circuit gets the electricity from the battery end, low-power consumption circuit and auxiliary power supply compete to supply power to MCU power supply circuit, the MCU controller gets the electricity from MCU power supply circuit, when the system shuts down, the MCU controller sends out the close pulse to auxiliary power supply shutdown circuit, with closing auxiliary power supply through auxiliary power supply shutdown circuit, and enter the low-power consumption mode, the lead wire that starts the enabling circuit is in the twinkling of an eye in the outside short circuit, the MCU controller detects the level change that starts the enabling circuit then withdraws from the low-power consumption mode, send the awakening pulse to auxiliary power supply awakening circuit, with awakening auxiliary power supply through auxiliary power supply awakening circuit.

Description

Emergency starting control circuit of DC/DC power supply

Technical Field

The invention relates to the technical field of power supply circuits, in particular to an emergency starting control circuit of a DC/DC power supply.

Background

In order to promote the optimization and upgrade of the energy industry and realize the clean low-carbon development, in recent years, China vigorously develops clean energy, such as wind power, photovoltaic and the like, to realize the spanning type large development. The installed capacity ratio of new energy is also increased day by day. However, when clean energy is developed at a high speed, the grid connection of the dynamic and intermittent new energy brings adverse effects to the power grid from many aspects such as regulation and control operation, safety control and the like, and the effective utilization of the clean energy is greatly limited. At present, a battery energy storage power station can be jointly applied with distributed/centralized new energy power generation, which is one of effective ways for solving the grid-connected problem of new energy power generation, and for the design of an energy storage control power supply system, the conventional method is as follows: the AC/DC power supply and the DC/DC power supply are used for competing to supply power to the battery management system, generally, under the condition that commercial power exists, the AC/DC power supply is inserted into the commercial power to activate the system to work, under the condition that the commercial power does not exist, the DC/DC power supply activates the system to work, in the above way, under the condition that the battery is under-voltage and the commercial power does not exist, the AC/DC power supply cannot be output, and in order to protect the battery from being consumed by the DC/DC power supply, the loss is caused, the DC/DC power supply cannot be output, and at the moment, the system cannot be activated and cannot work.

Disclosure of Invention

Based on at least one of the technical problems, the invention provides a novel emergency starting control circuit of the DC/DC power supply, which solves the problem of emergency starting of the system and the problem that the DC/DC power supply consumes power and loses the battery when the battery is in an undervoltage state.

In view of the above, the present invention provides a novel emergency start control circuit for DC/DC power supply, comprising: the power supply circuit comprises a low-power consumption circuit, an MCU controller, an MCU power supply circuit, a start enabling circuit, an auxiliary power supply wake-up circuit, an auxiliary power supply closing circuit and a power conversion circuit; the low-power consumption circuit gets electricity from a battery end, the low-power consumption circuit and the auxiliary power supply compete for supplying power to the MCU power supply circuit, the MCU controller gets electricity from the MCU power supply circuit, when a system is shut down, the MCU controller sends a closing pulse to the auxiliary power supply closing circuit so as to close the auxiliary power supply through the auxiliary power supply closing circuit and enter a low-power consumption mode, a lead of the starting enabling circuit is short-circuited at the outside instantaneously, the MCU controller detects that the level change of the starting enabling circuit exits the low-power consumption mode, and sends a wake-up pulse to the auxiliary power supply wake-up circuit so as to wake-up the auxiliary power supply through the auxiliary power supply wake-up circuit.

In the above technical solution, preferably, the method further includes: and the emergency key is electrically connected to the starting enabling circuit, and when the emergency key is pressed, a lead of the starting enabling circuit is externally short-circuited.

Through above technical scheme, can realize that outside enables the short circuit in the twinkling of an eye, MCU withdraws from low-power mode, send activation pulse, activation auxiliary power supply work, when needs are shut down, MCU signals closes the main power output, then send auxiliary power supply and close the pulse, close auxiliary power supply work, MCU gets into low-power consumption work at last, thereby energy storage system has been solved and has not had the commercial power, the battery is under-voltage, the whole emergent start-up problem that does not have under the low-voltage circumstances of system, it is extremely low also to have ensured simultaneously that energy storage system's consumption is under the battery under-voltage, be unlikely to the battery and draw the.

Drawings

Fig. 1 shows a schematic configuration of an emergency start control circuit of a DC/DC power supply according to an embodiment of the present invention.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

As shown in fig. 1, the emergency start control circuit of the DC/DC power supply includes: the circuit comprises a low power consumption circuit 101, an MCU controller 102, an MCU power supply circuit 103, a start-up enabling circuit 104, an auxiliary power supply 105, an auxiliary power supply wake-up circuit 106, an auxiliary power supply shut-down circuit 107 and a power conversion circuit 108.

Wherein, the low power consumption circuit 101 gets power from the battery end, the low power consumption circuit 101 and the auxiliary power supply 105 compete to supply power to the MCU power supply circuit 103, the MCU controller 102 gets power from the MCU power supply circuit 103, when the system is shut down, the MCU controller 102 sends a close pulse to the auxiliary power supply close circuit 107 to close the auxiliary power supply 105 through the auxiliary power supply close circuit 107 and enter a low power consumption mode, at the moment that the lead of the start enable circuit is externally short-circuited, specifically, the start enable circuit is electrically connected with an emergency start key, when the emergency key is pressed, the lead of the start enable circuit is externally short circuited, the MCU controller 102 exits the low power consumption mode when detecting the level change of the start enable circuit 104, sends a wake-up pulse to the auxiliary power supply wake-up circuit 106 to wake-up the auxiliary power supply 105 through the auxiliary power supply wake-up circuit 106, the circuit gets power from the battery through the low power consumption circuit during the, the stored energy is used for maintaining the work of the low-power consumption MCU and the awakening energy supply of the auxiliary power supply, the MCU is supplied with power by the low-power consumption circuit and the auxiliary power supply in a competitive mode, and under the condition that the auxiliary power supply does not work, the MCU works in a low-power consumption mode, so that the power consumption of the low-power consumption circuit plus the MCU (in the low-power consumption mode) is ensured to be less than 60 mW; under auxiliary power supply operating conditions, MCU work in normal operating mode, can sample power circuit signal and control power circuit operation, start enabling circuit lead wire external short circuit in the twinkling of an eye, MCU detects its level change, can withdraw from low-power consumption operating mode, sends auxiliary power supply awaken pulse signal, starts enabling circuit short circuit current restriction within 20uA, and the guarantee low-power consumption circuit can support.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An emergency start control circuit for a DC/DC power supply, comprising:

the power supply circuit comprises a low-power consumption circuit, an MCU controller, an MCU power supply circuit, a start enabling circuit, an auxiliary power supply wake-up circuit, an auxiliary power supply closing circuit and a power conversion circuit;

the low-power consumption circuit gets electricity from a battery end, the low-power consumption circuit and the auxiliary power supply compete for supplying power to the MCU power supply circuit, the MCU controller gets electricity from the MCU power supply circuit, when a system is shut down, the MCU controller sends a closing pulse to the auxiliary power supply closing circuit so as to close the auxiliary power supply through the auxiliary power supply closing circuit and enter a low-power consumption mode, a lead of the starting enabling circuit is short-circuited at the outside instantaneously, the MCU controller detects that the level change of the starting enabling circuit exits the low-power consumption mode, and sends a wake-up pulse to the auxiliary power supply wake-up circuit so as to wake-up the auxiliary power supply through the auxiliary power supply wake-up circuit.

2. The emergency start control circuit of a DC/DC power supply of claim 1, further comprising: and the emergency key is electrically connected to the starting enabling circuit, and when the emergency key is pressed, a lead of the starting enabling circuit is externally short-circuited.