WO2024017172A1

WO2024017172A1 - Charging control circuit and electronic device

Info

Publication number: WO2024017172A1
Application number: PCT/CN2023/107576
Authority: WO
Inventors: 黎志勇
Original assignee: 深圳市海柔创新科技有限公司
Priority date: 2022-07-19
Filing date: 2023-07-14
Publication date: 2024-01-25
Also published as: CN218243078U

Abstract

A charging control circuit and an electronic device. The charging control circuit comprises: a first alternating current input end of a first single-phase charging module (101) and a first alternating current input end of a second single-phase charging module (102) being used for being externally connected to a third phase line in a three-phase alternating current power grid; a second alternating current input end of the first single-phase charging module and a first alternating current input end of a third single-phase charging module (103) being used for being externally connected to a second phase line in the three-phase alternating current power grid; a second alternating current input end of the second single-phase charging module and a second alternating current input end of the third single-phase charging module being used for being externally connected to a first phase line of the three-phase alternating-current power grid; a first direct current output end of the first single-phase charging module, a first direct current output end of the second single-phase charging module, and a first direct current output end of the third single-phase charging module being electrically connected to a first output end (104); and a second direct current output end of the first single-phase charging module, a second direct current output end of the second single-phase charging module, and a second direct current output end of the third single-phase charging module being electrically connected to a second output end (105).

Description

Charging control circuit and electronic equipment

This application claims priority to the Chinese patent application filed with the China Patent Office on July 19, 2022, with application number 202221864136.3 and the application name "Charging Control Circuit and Electronic Equipment", the entire content of which is incorporated into this application by reference.

Technical field

The present application relates to the field of circuit electronics, and specifically to a charging control circuit and electronic equipment.

Background technique

At present, in the field of intelligent warehousing systems, Automated Guided Vehicles (AGVs for short) are widely used. The distinguishing feature of AGV vehicles is that they are driverless. The AGV vehicles are equipped with automatic guidance systems. They do not require manual navigation. In this case, it can automatically drive along a predetermined route and automatically transport goods or materials from the starting point to the destination. The AGV trolley combines the advanced theory and application technology in today's scientific and technological field. It has strong guidance ability, high positioning accuracy and good automatic driving performance. It reduces the loss of human operation, improves work efficiency and saves labor costs. Moreover, the AGV trolley It can work in places that are inconvenient for people to enter and is suitable for various complex factory transportation scenarios.

When the power of the AGV car is about to run out, it will arrive at the location of the AGV charging pile for charging. In the existing technology, since industrial power is input from the three-phase AC grid, a three-phase input power module is usually used in AGV charging piles to meet the scenario of three-phase AC grid input in industrial power. However, the three-phase input power module is larger and more expensive, which will increase the cost of using the AGV car.

Utility model content

In view of this, the present application provides a charging control circuit and electronic equipment to help solve the problem that the three-phase input power module used in the AGV charging pile in the prior art is large and expensive.

In a first aspect, embodiments of the present application provide a charging control circuit, including: a first single-phase charging module, a second single-phase charging module, a third single-phase charging module, a first output terminal, and a second output terminal;

The first AC input end of the first single-phase charging module and the first AC input end of the second single-phase charging module are used to connect to the third phase line of the three-phase AC power grid; the first single-phase charging The second AC input end of the module and the first AC input end of the third single-phase charging module are used to externally connect the second phase line in the three-phase AC power grid; the second AC input end of the second single-phase charging module The input terminal and the second AC input terminal of the third single-phase charging module are used to externally connect the first phase line of the three-phase AC power grid;

The ground terminal of the first single-phase charging module, the ground terminal of the second single-phase charging module and the ground terminal of the third single-phase charging module are used to externally connect the neutral line in the three-phase AC power grid;

The first DC output terminal of the first single-phase charging module, the first DC output terminal of the second single-phase charging module, and the first DC output terminal of the third single-phase charging module are connected to the first DC output terminal of the first single-phase charging module. The first output terminal is electrically connected to the second DC output terminal of the first single-phase charging module, the second DC output terminal of the second single-phase charging module and the second DC output of the third single-phase charging module. terminal is electrically connected to the second output terminal;

The first output terminal and the second output terminal are used for external loads.

Preferably, it also includes: a control module, a first switch module, and a second switch module;

The first output end of the control module is electrically connected to the control end of the first switch module, and the second output end of the control module is electrically connected to the control end of the second switch module;

The first end of the first switch module is electrically connected to the first AC input end of the first single-phase charging module and the first AC input end of the second single-phase charging module. The second end is used to connect to the third phase line in the external three-phase AC power grid;

The third terminal of the first switch module is electrically connected to the second AC input terminal of the first single-phase charging module and the first AC input terminal of the third single-phase charging module. The fourth terminal is used to connect to the second phase line in the external three-phase AC power grid;

The fifth terminal of the first switch module is electrically connected to the second AC input terminal of the second single-phase charging module and the second AC input terminal of the third single-phase charging module. The sixth terminal is used to connect the first phase line in the external three-phase AC power grid.

The first DC output terminal of the first single-phase charging module, the first DC output terminal of the second single-phase charging module, and the first and second DC output terminals of the third single-phase charging module. The first end of the switch module is electrically connected; the second end of the second switch module is electrically connected to the first output end;

The second DC output terminal of the first single-phase charging module, the second DC output terminal of the second single-phase charging module, the second DC output terminal of the third single-phase charging module and the second switch module The third terminal is electrically connected; the fourth terminal of the second switch module is electrically connected to the second output terminal.

Preferably, the first switch module includes an AC contactor or a three-pole single-throw switch; the second switch module includes a DC contactor or a double-pole single-throw switch.

Preferably, the first switch module includes a first switch sub-module, a second switch sub-module and a third switch sub-module; the second switch module includes a fourth switch sub-module and a fifth switch sub-module;

The control terminals of the first switch sub-module, the second switch sub-module and the third switch sub-module are electrically connected to the first output terminal of the control module; the control of the fourth switch sub-module and the fifth switch sub-module The terminal is electrically connected to the second output terminal of the control module;

The first end of the first switch sub-module is electrically connected to the first AC input end of the first single-phase charging module and the first AC input end of the second single-phase charging module. The first switch sub-module The second end of the module is used to connect to the third phase line in the external three-phase AC power grid;

The first end of the second switch sub-module is electrically connected to the second AC input end of the first single-phase charging module and the first AC input end of the third single-phase charging module. The second switch sub-module The second end of the module is used to connect to the second phase line in the external three-phase AC power grid;

The first end of the third switch sub-module is electrically connected to the second AC input end of the second single-phase charging module and the second AC input end of the third single-phase charging module. The third switch sub-module The second end of the module is used to connect to the first phase line of the external three-phase AC power grid;

The first DC output terminal of the first single-phase charging module, the first DC output terminal of the second single-phase charging module, and the first DC output terminal of the third single-phase charging module are connected to the first DC output terminal of the first single-phase charging module. The first end of the fourth switch sub-module is electrically connected; the second end of the fourth switch sub-module is electrically connected to the first output end;

The second DC output terminal of the first single-phase charging module and the second DC output terminal of the second single-phase charging module And the second DC output end of the third single-phase charging module is electrically connected to the first end of the fifth switch sub-module; the second end of the fifth switch sub-module is electrically connected to the second output end. .

Preferably, the first switch sub-module, the second switch sub-module, the third switch sub-module, the fourth switch sub-module and the fifth switch sub-module include single-pole single-throw switches or thyristors.

Preferably, it also includes: a first current sampler, a second current sampler, a third current sampler and a voltage sampler;

The first output end of the first current sampler is electrically connected to the first input end of the control module, and the first output end of the second current sampler is electrically connected to the second input end of the control module, The first output end of the third current sampler is electrically connected to the third input end of the control module, and the output end of the voltage sampler is electrically connected to the fourth input end of the control module;

The first DC output terminal of the first single-phase charging module is electrically connected to the input terminal of the first current sampler, and the first DC output terminal of the second single-phase charging module is connected to the second current sampler. The input end of the sampler is electrically connected, the first DC output end of the third single-phase charging module is electrically connected to the input end of the third current sampler, and the input end of the voltage sampler is electrically connected to the first The second output terminal of the current sampler, the second output terminal of the second current sampler, the second output terminal of the third current sampler and the first terminal of the second switch module are electrically connected.

Preferably, the control module includes: a comparator and a controller;

The first output terminal of the first current sampler is electrically connected to the first input terminal of the comparator, and the first output terminal of the second current sampler is electrically connected to the second input terminal of the comparator, The first output terminal of the third current sampler is electrically connected to the third input terminal of the comparator, the output terminal of the comparator is electrically connected to the first input terminal of the controller, and the voltage sampler The output terminal is electrically connected to the second input terminal of the controller;

The first output end of the controller is electrically connected to the control end of the first switch module, and the second output end of the controller is electrically connected to the control end of the second switch module.

Preferably, it also includes: a leakage protection circuit breaker;

The first end of the leakage protection circuit breaker is electrically connected to the second end of the first switch module, and the second end of the leakage protection circuit breaker is used to externally connect the third phase line in the three-phase AC power grid;

The third end of the leakage protection circuit breaker is electrically connected to the fourth end of the first switch module, and the fourth end of the leakage protection circuit breaker is used to externally connect the second phase line in the three-phase AC power grid;

The fifth terminal of the leakage protection circuit breaker is electrically connected to the sixth terminal of the first switch module, and the sixth terminal of the leakage protection circuit breaker is used to externally connect the first phase line in the three-phase AC power grid.

Preferably, the first single-phase charging module, the second single-phase charging module and the third single-phase charging module are of the same model.

Preferably, the first current sampler, the second current sampler, the third current sampler and the voltage sampler are integrated in the same chip.

Preferably, the first current sampler, the second current sampler, the third current sampler and the voltage sampler are integrated in the control module.

In a second aspect, an embodiment of the present application provides an electronic device. The electric vehicle includes the charging control circuit described in any one of the above first aspects.

Using the solution provided by the embodiment of the present application, the charging control circuit includes: a first single-phase charging module, a second single-phase charging module, and a third single-phase charging module. The first AC input terminal of the first single-phase charging module and the first AC input terminal of the second single-phase charging module are used for external connection to the third phase line in the three-phase AC power grid; the second AC input terminal of the first single-phase charging module The input terminal and the first AC input terminal of the third single-phase charging module are used to externally connect the second phase line in the three-phase AC power grid; the second AC input terminal of the second single-phase charging module and the third AC input terminal of the third single-phase charging module The two AC input terminals are used for external connection to the first phase line of the three-phase AC power grid; the ground terminal of the first single-phase charging module, the ground terminal of the second single-phase charging module, and the ground terminal of the third single-phase charging module are used for external connection of the three-phase AC power grid. The neutral line in the AC power grid; the first DC output terminal of the first single-phase charging module, the first DC output terminal of the second single-phase charging module, and the first DC output terminal of the third single-phase charging module Electrically connected, the second DC output terminal of the first single-phase charging module, the second DC output terminal of the second single-phase charging module and the second DC output terminal of the third single-phase charging module are electrically connected. That is to say, when industrial power is input from a three-phase AC power grid, the above-mentioned charging control circuit can be used in the charging pile. The charging control circuit includes a first single-phase charging module, a second single-phase charging module and a third single-phase charging module. The phase charging module, the first single-phase charging module, the second single-phase charging module and the third single-phase charging module can be connected to the three-phase AC power grid through the above connection method. Furthermore, the first DC output terminal of the first single-phase charging module, the first DC output terminal of the second single-phase charging module, and the first DC output terminal of the third single-phase charging module are electrically connected to the first output terminal. , the second DC output terminal of the first single-phase charging module, the second DC output terminal of the second single-phase charging module, and the second DC output terminal of the third single-phase charging module are electrically connected to the second output terminal, and the first output The terminal and the second output terminal are used to connect an external load to charge the load. The first single-phase charging module can convert the input AC power between the third phase line and the second phase line into DC power, and output it through the first DC output terminal and the second DC output terminal of the first single-phase charging module; The second single-phase charging module can convert the input alternating current between the third phase line and the first phase line into direct current, and output it through the first DC output terminal and the second DC output terminal of the second single-phase charging module; the third The single-phase charging module can convert the input AC power between the second phase line and the first phase line into DC power, and output it through the first DC output terminal and the second DC output terminal of the third single-phase charging module. Then, the direct current output by the first single-phase charging module, the second single-phase charging module and the third single-phase charging module is output through the first output terminal and the second output terminal, and the first output terminal and the second output terminal are connected to an external load, so that Charge the load. In this way, in the charging pile, there is no need to use a three-phase input charging module. Three single-phase charging modules can be used to convert the three-phase AC power provided by the three-phase AC grid into a DC output. Since single-phase charging modules are relatively The price is lower, so the development cost of charging piles can be reduced.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without exerting creative labor.

Figure 1 is a schematic structural diagram of a charging control circuit provided by an embodiment of the present application;

Figure 2 is a schematic structural diagram of another charging control circuit provided by an embodiment of the present application;

Figure 3 is a schematic structural diagram of another charging control circuit provided by an embodiment of the present application;

Figure 4 is a schematic structural diagram of another charging control circuit provided by an embodiment of the present application;

Figure 5 is a schematic structural diagram of another charging control circuit provided by an embodiment of the present application;

FIG. 6 is a schematic structural diagram of another charging control circuit provided by an embodiment of the present application.

Detailed ways

In order to better understand the technical solution of the present application, the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

It should be clear that the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other information obtained by those of ordinary skill in the art without making creative efforts The embodiments all belong to the protection scope of this application.

The terminology used in the embodiments of the present application is only for the purpose of describing specific embodiments and is not intended to limit the present application. As used in the embodiments and the appended claims, the singular forms "a," "the" and "the" are intended to include the plural forms as well, unless the context clearly dictates otherwise.

It should be understood that the term "and/or" used in this article is only an association relationship describing related objects, indicating that there can be three relationships, for example, A and/or B, which can mean: A alone exists, and A and A exist simultaneously. B, there are three situations of B alone. In addition, the character "/" in this article generally indicates that the related objects are an "or" relationship.

Before giving a detailed introduction to the embodiments of the present application, terminology that is or may be applied in the embodiments of the present application is first explained.

Three-phase balance: Three-phase balance means that the load power carried by each of the three phase lines must be basically equal. It is also usually called three-phase load balance. Three-phase load balance is the basis for safe power supply. An unbalanced three-phase load may at least reduce the power supply efficiency of lines and distribution transformers, or at worst may cause serious consequences such as burnout of certain phase wires, burnout of switches, or even single-phase burnout of distribution transformers due to excessive overloading of heavy-load phases. .

At present, in the field of intelligent warehousing systems, Automated Guided Vehicles (AGVs for short) are widely used. The distinguishing feature of AGV vehicles is that they are driverless. The AGV vehicles are equipped with automatic guidance systems. They do not require manual navigation. In this case, it can automatically drive along a predetermined route and automatically transport goods or materials from the starting point to the destination. The AGV trolley combines the advanced theory and application technology in today's scientific and technological field. It has strong guidance ability, high positioning accuracy and good automatic driving performance. It reduces the loss of human operation, improves work efficiency and saves labor costs. Moreover, the AGV trolley It can work in places that are inconvenient for people to enter and is suitable for various complex factory transportation scenarios. When the power of the AGV car is about to run out, it will arrive at the location of the AGV charging pile for charging.

In the existing technology, since industrial power is input from the three-phase AC grid, a three-phase input power module is usually used in AGV charging piles to meet the scenario of three-phase AC grid input in industrial power. However, the three-phase input power module is larger and more expensive, which will increase the cost of using the AGV car.

To address the above problems, embodiments of the present application provide a charging control circuit and electronic equipment. The charging control circuit includes: a first single-phase charging module, a second single-phase charging module, and a third single-phase charging module. The first AC input terminal of the first single-phase charging module and the first AC input terminal of the second single-phase charging module are used for external connection to the third phase line in the three-phase AC power grid; the second AC input terminal of the first single-phase charging module terminal and the first AC input terminal of the third single-phase charging module are used to connect to the second phase line in the external three-phase AC power grid; the second AC input terminal of the second single-phase charging module and the second AC input terminal of the third single-phase charging module The AC input terminal is used for external connection to the first phase line of the three-phase AC power grid; the ground terminal of the first single-phase charging module, the ground terminal of the second single-phase charging module, and the ground terminal of the third single-phase charging module are used for external connection of the three-phase The neutral line in the AC power grid; the first DC output terminal of the first single-phase charging module, the first DC output terminal of the second single-phase charging module, and the first DC output terminal of the third single-phase charging module. The second DC output terminal of the first single-phase charging module, the second DC output terminal of the second single-phase charging module and the second DC output terminal of the third single-phase charging module are electrically connected. That is to say, when industrial power is input from a three-phase AC power grid, the above-mentioned charging control circuit can be used in the charging pile. The charging control circuit includes a first single-phase charging module, a second single-phase charging module and a third single-phase charging module. The phase charging module, the first single-phase charging module, the second single-phase charging module and the third single-phase charging module can be connected to the three-phase AC power grid through the above connection method. Furthermore, the first DC output terminal of the first single-phase charging module, the first DC output terminal of the second single-phase charging module, and the first DC output terminal of the third single-phase charging module are electrically connected to the first output terminal. , the second DC output terminal of the first single-phase charging module, the second DC output terminal of the second single-phase charging module, and the second DC output terminal and the second output terminal of the third single-phase charging module. Electrically connected, the first output terminal and the second output terminal are used to connect an external load to charge the load. The first single-phase charging module can convert the input AC power between the third phase line and the second phase line into DC power, and output it through the first DC output terminal and the second DC output terminal of the first single-phase charging module; The second single-phase charging module can convert the input alternating current between the third phase line and the first phase line into direct current, and output it through the first DC output terminal and the second DC output terminal of the second single-phase charging module; the third The single-phase charging module can convert the input AC power between the second phase line and the first phase line into DC power, and output it through the first DC output terminal and the second DC output terminal of the third single-phase charging module. Then, the direct current output by the first single-phase charging module, the second single-phase charging module and the third single-phase charging module is output through the first output terminal and the second output terminal, and the first output terminal and the second output terminal are externally loaded, so that Charge the load. In this way, in the charging pile, there is no need to use a three-phase input charging module. The three-phase AC power provided by the three-phase AC grid can be converted into a DC output through three single-phase charging modules. Since single-phase charging modules are relatively The price is lower, so the development cost of charging piles can be reduced. The details are explained below.

Refer to Figure 1, which is a schematic structural diagram of a charging control circuit provided by an embodiment of the present application. The charging control circuit includes: a first single-phase charging module 101, a second single-phase charging module 102, a third single-phase charging module 103, a first output terminal 104 and a second output terminal 105.

The first AC input terminal of the first single-phase charging module 101 and the first AC input terminal of the second single-phase charging module 102 are used for external connection to the third phase line in the three-phase AC power grid; the third phase line of the first single-phase charging module 101 The second AC input terminal and the first AC input terminal of the third single-phase charging module are used to connect to the second phase line of the external three-phase AC power grid; the second AC input terminal and the third single-phase charging module of the second single-phase charging module 102 The second AC input end of the module 103 is used to externally connect to the first phase line of the three-phase AC power grid.

The ground terminal of the first single-phase charging module 101, the ground terminal of the second single-phase charging module 102, and the ground terminal of the third single-phase charging module 103 are used for external connection to the neutral line in the three-phase AC power grid.

The first DC output terminal of the first single-phase charging module 101, the first DC output terminal of the second single-phase charging module 102, and the first DC output terminal and the first output terminal 104 of the third single-phase charging module 103. Electrically connected, the second DC output terminal of the first single-phase charging module 101, the second DC output terminal of the second single-phase charging module 102, and the second DC output terminal and the second output terminal 105 of the third single-phase charging module 103 Electrical connection.

The first output terminal 104 and the second output terminal 105 are used for external load connection.

Specifically, industrial power is usually a three-phase four-wire AC power grid. The three-phase four-wire AC power grid includes three live wires (the first phase line, the second phase line, and the third phase line) and a neutral line. wire to ground. Therefore, the embodiment of the present application proposes a charging control circuit, including a first single-phase charging module 101, a second single-phase charging module 102, and a third single-phase charging module 103. In the charging control circuit, three single-phase charging modules can be connected to the first phase line, the second phase line, the third phase line and the neutral line in the three-phase AC power grid. The first single-phase charging module 101 can convert the alternating current between the third phase line and the second phase line received at the input end into direct current, and pass the first DC output end and the second direct current output of the first single-phase charging module 101 terminal output; the second single-phase charging module can convert the input AC power between the third phase line and the first phase line into DC power, and pass the first DC output end and the second DC output end of the second single-phase charging module Output; the third single-phase charging module can convert the input AC power between the second phase line and the first phase line into DC power, and output it through the first DC output terminal and the second DC output terminal of the third single-phase charging module . That is, in the charging pile, the three-phase AC power provided by the three-phase AC power grid can be converted into DC output through three single-phase charging modules. The first DC output terminal of the first single-phase charging module 101, the first DC output terminal of the second single-phase charging module 102, and the first DC output terminal of the third single-phase charging module 103 are electrically connected to the first output terminal of the first single-phase charging module 101. Connect; the second DC output terminal of the first single-phase charging module 101, The second DC output terminal of the second single-phase charging module 102 and the second DC output terminal of the third single-phase charging module 103 are electrically connected to the second output terminal. In this way, the DC power output by the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103 can be output together through the first output terminal 104 and the second output terminal 105. The first The output terminal 104 and the second output terminal 105 are connected to an external load to provide power to the load.

For example, in the field of intelligent warehousing systems, three-phase input charging modules are usually used in the charging piles of Automated Guided Vehicles (AGV) to convert three-phase AC power into DC output to meet the needs of industrial power consumption. Three-phase AC power grid input scenario. However, the three-phase input charging module is larger and more expensive. Therefore, the charging control circuit can be applied to the charging pile of the AGV car. Through the above connection method, the first single-phase charging module 101 and the second single-phase charging module 101 inside the charging pile The single-phase charging module 102 and the third single-phase charging module 103 can be connected to the three-phase AC power grid, so that the three-phase AC power grid can be the first single-phase charging module 101, the second single-phase charging module 102, and the third single-phase charging module. 103 powered. The first single-phase charging module 101 can convert the input AC power between the third phase line and the second phase line into DC power, and output it through the first DC output terminal and the second DC output terminal of the first single-phase charging module 101 ; The second single-phase charging module can convert the input alternating current between the third phase line and the first phase line into direct current, and output it through the first DC output terminal and the second DC output terminal of the second single-phase charging module; The third single-phase charging module can convert the input AC power between the second phase line and the first phase line into DC power, and output it through the first DC output terminal and the second DC output terminal of the third single-phase charging module. The DC power output by the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103 is output through the first output terminal 104 and the second output terminal 105 of the charging pile. The first output terminal of the charging pile 104 and the second output terminal 105 can be connected to an external load (AGV car) to charge the AGV car. In this way, in the charging pile of the AGV car, there is no need to use a three-phase input charging module. Three-phase AC power can be converted into DC output through three single-phase charging modules. Since single-phase charging modules are relatively low-priced , thus reducing the development cost of charging piles.

Further, the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103 have the same model.

Specifically, three-phase balance means that the load power carried by each of the three phase lines must be basically equal. It is also usually called three-phase load balance. Three-phase load balance is the basis for safe power supply. In order to ensure the load balance of the first phase line, the second phase line and the third phase line in the three-phase AC power grid, the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103 The models are the same to ensure three-phase balance.

As a possible implementation, as shown in FIG. 2 , the charging control circuit further includes: a control module 106 , a first switch module 107 , and a second switch module 108 .

The first output terminal of the control module 106 is electrically connected to the control terminal of the first switch module 107 , and the second output terminal of the control module 106 is electrically connected to the control terminal of the second switch module 108 .

The first end of the first switch module 107 is electrically connected to the first AC input end of the first single-phase charging module 101 and the first AC input end of the second single-phase charging module 102. The second end of the first switch module 107 is The third phase line in the external three-phase AC power grid.

The third terminal of the first switch module 107 is electrically connected to the second AC input terminal of the first single-phase charging module 101 and the first AC input terminal of the third single-phase charging module 103. The fourth terminal of the first switch module 107 is The second phase line in the external three-phase AC power grid.

The fifth terminal of the first switch module 107 is electrically connected to the second AC input terminal of the second single-phase charging module 102 and the second AC input terminal of the third single-phase charging module 103. The sixth terminal of the first switch module 107 is Connected to external three-phase AC power grid The first phase line in .

The first DC output terminal of the first single-phase charging module 101, the first DC output terminal of the second single-phase charging module 102, the first DC output terminal of the third single-phase charging module 103 and the second switch module 108 The first end of the second switch module 108 is electrically connected to the first output end 104 .

The second DC output terminal of the first single-phase charging module 101 , the second DC output terminal of the second single-phase charging module 102 , the second DC output terminal of the third single-phase charging module 103 and the third DC output terminal of the second switch module 108 The fourth terminal of the second switch module 108 is electrically connected to the second output terminal 105 .

Specifically, the charging control circuit also includes a control module 106, a first switch module 107, and a second switch module 108. The control module 106 can send a first control signal to the first switch module 107 to control the on/off of the first switch module 107, and can send a second control signal to the second switch module 108 to control the on/off of the second switch module. It can be seen from the above connection method that the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103 are externally connected to the three-phase AC power grid through the first switch module 107. The two single-phase charging modules 102 and the third single-phase charging module 103 are connected to the first output terminal 104 and the second output terminal 105 through the second switch module 108, and the first output terminal 104 and the second output terminal 105 are connected to external loads. When the control module 106 determines that the external load needs to be charged, it controls the first switch module 107 and the second switch module 108 to be turned on, so that the first end and the second end of the first switch module 107 can be turned on, and the third end of the first switch module 107 can be turned on. The fourth terminal is connected to the fourth terminal, the fifth terminal is connected to the sixth terminal, the first terminal to the second terminal of the second switch module 108 is connected to the second terminal, and the third terminal to the fourth terminal is connected to the fourth terminal, so that the entire charging control circuit is connected to the fourth terminal. Pass. That is, the input end of the first single-phase charging module 101 can receive the alternating current between the third phase line and the second phase line of the three-phase AC power grid, and the first single-phase charging module 101 converts the received alternating current into direct current, and Output to the first output terminal 104 and the second output terminal 105. Similarly, the input end of the second single-phase charging module 102 can receive the AC power between the third phase line and the first phase line of the three-phase AC power grid. The second single-phase charging module 102 converts the received AC power into DC power, and Output to the first output terminal 104 and the second output terminal 105. The input end of the third single-phase charging module 103 can receive the alternating current between the second phase line and the first phase line of the three-phase AC power grid. The third single-phase charging module 103 converts the received alternating current into direct current and outputs it to the third single-phase charging module 103. An output terminal 104 and a second output terminal 105. The first output terminal 104 and the second output terminal 105 output direct current to charge the load.

When the control module 106 determines that it is necessary to stop charging the load, it can control the first terminal of the second switch module 108 to disconnect from the second terminal and the third terminal from the fourth terminal to disconnect the charging control circuit from the load. , thereby stopping charging the load. Moreover, during the process of charging the load, the first single-phase charging module 101, the second single-phase charging module 102, and the third single-phase charging module 103 may malfunction, which may cause a three-phase imbalance phenomenon, thereby affecting Stability of three-phase AC power grid. Therefore, the control module 106 can detect the operating status of the first single-phase charging module 101, the second single-phase charging module 102, and the third single-phase charging module 103 in real time, and when a failure of any single-phase charging module is detected, control the third single-phase charging module. One switch module 107 or the second switch module 108 is disconnected, so that the first end of the first switch module 107 can be disconnected from the second end, the third end from the fourth end, and the fifth end from the sixth end. Open or disconnect the first end from the second end and the third end from the fourth end of the second switch module 108 to disconnect the charging control circuit from the three-phase AC power grid to ensure the stability of the three-phase AC power grid. sex.

Further, the first switch module 107 includes an AC contactor or a three-pole single-throw switch; the second switch module 108 includes a DC contactor or a double-pole single-throw switch.

Specifically, since the first switch module 107 is disposed on the input side of the three-phase AC power grid, the first switch module 107 needs to pass AC power. Therefore, the first switch module 107 can be an AC contactor or a three-pole single-throw switch. Since the second switch mode Block 108 is provided on the DC output side of the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103. The second switch module 108 needs to pass DC power. Therefore, the second switch module 108 can be DC contactor or double pole single throw switch.

As a possible implementation, as shown in Figure 3, the first switch module 107 includes a first switch sub-module 1071, a second switch sub-module 1072 and a third switch sub-module 1073; the second switch module 108 includes a fourth switch Sub-module 1081 and the fifth switch sub-module 1082.

The control terminals of the first switch sub-module 1071, the second switch sub-module 1072 and the third switch sub-module 1073 are electrically connected to the first output terminal of the control module 106; the control of the fourth switch sub-module 1081 and the fifth switch sub-module 1082 The terminal is electrically connected to the second output terminal of the control module 106.

The first end of the first switch sub-module 1071 is electrically connected to the first AC input end of the first single-phase charging module 101 and the first AC input end of the second single-phase charging module 102. The second end of the first switch sub-module 1071 The terminal is used for external connection to the third phase line in the three-phase AC power grid.

The first end of the second switch sub-module 1072 is electrically connected to the second AC input end of the first single-phase charging module 101 and the first AC input end of the third single-phase charging module 103. The second end of the second switch sub-module 1072 The terminal is used to connect the second phase line in the external three-phase AC power grid.

The first end of the third switch sub-module 1073 is electrically connected to the second AC input end of the second single-phase charging module 102 and the second AC input end of the third single-phase charging module 103. The second end of the third switch sub-module 1073 The terminal is used for external connection to the first phase line in the three-phase AC power grid.

The first DC output terminal of the first single-phase charging module 101, the first DC output terminal of the second single-phase charging module 102, the first DC output terminal of the third single-phase charging module 103 and the fourth switch sub-module The first end of 1081 is electrically connected, and the second end of the fourth switch sub-module 1081 is electrically connected to the first output end 104;

The second DC output terminal of the first single-phase charging module 101 , the second DC output terminal of the second single-phase charging module 102 , the second DC output terminal of the third single-phase charging module 103 and the third DC output terminal of the fifth switch sub-module 1082 One end is electrically connected, and the second end of the fifth switch sub-module 1082 is electrically connected to the second output terminal 105 .

Specifically, the first switch module 107 can be a whole, for example, it can be an AC contactor or a three-pole single-throw switch. The first switch module 107 can also be composed of three switch modules. In this case, the first switch module 107 It includes a first switch sub-module 1071, a second switch sub-module 1072 and a third switch sub-module 1073. It can be seen from the above connection method that the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103 pass through the first switch sub-module 1071, the second switch sub-module 1072 and the third switch sub-module 1073 Connected to the three-phase AC power grid to convert three-phase AC power into DC output. Among them, the control terminals of the first switch sub-module 1071, the second switch sub-module 1072 and the third switch sub-module 1073 are electrically connected to the first output terminal of the control module 106, that is, the first switch sub-module 1071, the second switch sub-module 1071 and the second switch sub-module 1073. The module 1072 and the third switch sub-module 1073 share the same first control signal. When the first control signal instructs the first switch sub-module 1071, the second switch sub-module 1072 and the third switch sub-module 1073 to be turned on, the first switch The first end and the second end of the sub-module 1071, the first end and the second end of the second switch sub-module 1072, and the first end and the second end of the third switch sub-module 1073 are simultaneously connected; when the control signal indicates the third When the first switch sub-module 1071, the second switch sub-module 1072 and the third switch sub-module 1073 are disconnected, the first end and the second end of the first switch sub-module 1071 and the first end and the second end of the second switch sub-module 1072 are disconnected. The first terminal and the second terminal of the two-terminal and third switch sub-modules 1073 are disconnected simultaneously. The second switch module 108 includes a fourth switch sub-module 1081 and a fifth switch sub-module 1082. The first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103 pass through the fourth switch sub-module 1081 And the fifth switch sub-module 1082 is connected to the first output terminal 104 and the second output terminal 105 to convert the DC power output by the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103. It is output through the first output terminal 104 and the second output terminal 105 to charge the load. Among them, the control terminals of the fourth switch sub-module 1081 and the fifth switch sub-module 1082 are electrically connected to the second output terminal of the control module 106, that is, the fourth switch sub-module 1081 and the fifth switch sub-module 1082 share the same first switch sub-module 1082. Two control signals, when the second control signal instructs the fourth switch sub-module 1081 and the fifth switch sub-module 1082 to be turned on, the first end and the second end of the fourth switch sub-module 1081 and the third end of the fifth switch sub-module 1082 One end and the second end are turned on at the same time; when the second control signal instructs the fourth switch sub-module 1081 and the fifth switch sub-module 1082 to disconnect, the first end of the fourth switch sub-module 1081 and the second end and the fifth end are turned on at the same time. The first terminal and the second terminal of the switch sub-module 1082 are disconnected simultaneously.

Further, the first switch sub-module 1071, the second switch sub-module 1072, the third switch sub-module 1073, the fourth switch sub-module 1081 and the fifth switch sub-module 1082 include single-pole single-throw switches or thyristors.

Specifically, since both single-pole single-throw switches and thyristors can pass direct current or alternating current, the first switch sub-module 1071, the second switch sub-module 1072, the third switch sub-module 1073, the fourth switch sub-module 1081 and the The five-switch sub-module 1082 may be a single-pole single-throw switch or a thyristor.

As a possible implementation, as shown in FIG. 4 , the charging control circuit further includes: a first current sampler 109 , a second current sampler 110 , a third current sampler 111 and a voltage sampler 112 .

The first output terminal of the first current sampler 109 is electrically connected to the first input terminal of the control module 106. The first output terminal of the second current sampler 110 is electrically connected to the second input terminal of the control module 106. The third current sampler 109 is electrically connected to the first input terminal of the control module 106. The first output terminal of the sensor 111 is electrically connected to the third input terminal of the control module 106, and the output terminal of the voltage sampler 112 is electrically connected to the fourth input terminal of the control module 106.

The first DC output terminal of the first single-phase charging module 101 is electrically connected to the input terminal of the first current sampler 109 , and the first DC output terminal of the second single-phase charging module 102 is connected to the input terminal of the second current sampler 110 The first DC output terminal of the third single-phase charging module 103 is electrically connected to the input terminal of the third current sampler 111 , and the input terminal of the voltage sampler 112 is electrically connected to the second output terminal of the first current sampler 109 , the second output terminal of the second current sampler 110, the second output terminal of the third current sampler 111 and the first terminal of the second switch module 108 are electrically connected.

Specifically, the charging control circuit also includes: a first current sampler 109, a second current sampler 110, a third current sampler 111 and a voltage sampler 112. When charging a load, if it is in a three-phase balanced state, the difference between the output power of any two modules among the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103 will not exceeds the preset threshold. Therefore, in order to ensure three-phase balance, the output power of the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103 can be collected, and the first single-phase charging module 101, the second single-phase charging module 103 can be detected. The difference between the output power of any two modules in the single-phase charging module 102 and the third single-phase charging module 103, if the first single-phase module 101, the second single-phase charging module 102 and the third single-phase charging module are detected When the difference between the output power of any two modules in 103 exceeds the preset threshold, it indicates that a three-phase imbalance occurs. At this time, the second switch module 108 needs to be controlled to be disconnected, so that the charging control circuit stops charging the load. Avoid affecting the stability of the three-phase AC power grid. Since the output power is the product of the output current and voltage, the output power of each single-phase charging module can be obtained by collecting the output current and voltage of each single-phase charging module. As shown in FIG. 4 , the first single-phase charging module 101 , the second single-phase charging module 102 and the third single-phase charging module 103 are equivalent to being connected in parallel. That is to say, the first single-phase charging module 101 , the second single-phase charging module 103 and the third single-phase charging module 103 are connected in parallel. The output voltages of the charging module 102 and the third single-phase charging module 103 are the same. One voltage sampler can be used to collect the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase The output voltage of the charging module 103. Then the first current sampler 109 is used to collect the output current of the first single-phase charging module 101, the second current sampler 110 is used to collect the output current of the second single-phase charging module 102, and the third current sampler 111 is used to collect the third single-phase charging module 102. The output current of the phase charging module 103. The first output terminal of the first current sampler 109 is electrically connected to the first input terminal of the control module 106. The first output terminal of the second current sampler 110 is electrically connected to the second input terminal of the control module 106. The third current sampler 109 is electrically connected to the first input terminal of the control module 106. The first output terminal of the sensor 111 is electrically connected to the third input terminal of the control module 106, and the output terminal of the voltage sampler 112 is electrically connected to the fourth input terminal of the control module 106. The control module 106 controls the first single-phase charging module 101, the second single-phase charging module 102, and the third single-phase charging module 103 according to the first current sampler 109, the second current sampler 110, and the third current sampler 111. The output current of the first single-phase charging module 101, the second single-phase charging module 102, and the third single-phase charging module 103 collected by the voltage sampler can be calculated to obtain the first single-phase charging module 101, the third single-phase charging module 101, and the third single-phase charging module 103. The difference between the output power of each of the two single-phase charging modules 102 and the third single-phase charging module 103. Then by detecting whether the difference in output power of any two modules among the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103 exceeds the preset threshold, it can be detected whether there are three Phase imbalance phenomenon. If a three-phase unbalance is detected, the control module 106 will send a second control signal to the second switch module 108 to control the connection between the first terminal and the second terminal of the second switch module 108 to be disconnected and the third terminal to be disconnected. The connection with the fourth terminal is disconnected, causing the charging control circuit to stop charging the load to ensure the stability of the three-phase AC power grid.

As a possible implementation, the first current sampler 109, the second current sampler 110, the third current sampler 111 and the voltage sampler 112 are integrated in the same chip.

Specifically, in order to simplify the circuit, the first current sampler 109, the second current sampler 110, the third current sampler 111 and the voltage sampler 112 can be integrated into the same chip.

As a possible implementation manner, the first current sampler 109 , the second current sampler 110 , the third current sampler 111 and the voltage sampler 112 are integrated in the control module 106 .

As a possible implementation, as shown in FIG. 5 , the control module 106 includes: a comparator 1061 and a controller 1062 .

The first output terminal of the first current sampler 109 is electrically connected to the first input terminal of the comparator 1061, the first output terminal of the second current sampler 110 is electrically connected to the second input terminal of the comparator 1061, and the third current sampler 109 is electrically connected to the first input terminal of the comparator 1061. The first output terminal of the comparator 111 is electrically connected to the third input terminal of the comparator 1061. The output terminal of the comparator 1061 is electrically connected to the first input terminal of the controller 1062. The output terminal of the voltage sampler 112 is electrically connected to the third input terminal of the controller 1062. The two input terminals are electrically connected.

The first output terminal of the controller 1062 is electrically connected to the control terminal of the first switch module 107 , and the second output terminal of the controller 1062 is electrically connected to the control terminal of the second switch module 108 .

Specifically, the control module 106 includes a comparator 1061 and a controller 1062. The comparator 1061 is used to compare the collected output current of the first single-phase charging module 101, the output current of the second single-phase charging module 102 and the third single-phase According to the output current of the charging module 103, the difference between the output currents of any two modules is calculated, and the calculated difference between the output currents of any two modules is given to the controller 1062. The controller 1062 can calculate the difference between the output power of any two modules based on the difference between the output currents of any two modules and the output voltage value collected by the voltage sampler 112, and detect the output power of any two modules. Whether the difference between the output powers of any two modules exceeds the preset threshold. If the difference between the output powers of any two modules exceeds the preset threshold, it indicates that a three-phase imbalance occurs. At this time, the controller 1062 can generate a second control signal, The second switch module 108 is controlled to be turned off, so that the charging control circuit stops charging the load.

As a possible implementation, as shown in FIG. 6 , the charging control circuit also includes: a leakage protection circuit breaker 113 .

The first end of the leakage protection circuit breaker 113 is electrically connected to the second end of the first switch module 107, and the second end of the leakage protection circuit breaker 113 is used to be externally connected to the third phase line in the three-phase AC power grid.

The third terminal of the leakage protection circuit breaker 113 is electrically connected to the fourth terminal of the first switch module 107, and the fourth terminal of the leakage protection circuit breaker 113 is used for external connection to the second phase line in the three-phase AC power grid.

The fifth terminal of the leakage protection circuit breaker 113 is electrically connected to the sixth terminal of the first switch module 107 , and the sixth terminal of the leakage protection circuit breaker 113 is used to be externally connected to the first phase line in the three-phase AC power grid.

Specifically, in order to avoid personal and property safety accidents when leakage occurs in the first single-phase charging module 101, the second single-phase charging module 102, and the third single-phase charging module 103, a leakage protection circuit breaker can be set in the charging control circuit. device. The first end of the leakage protection circuit breaker 113 is electrically connected to the second end of the first switch module 107, and the second end of the leakage protection circuit breaker 113 is used to connect to the third phase line of the three-phase AC power grid; the leakage protection circuit breaker 113 The third end of the leakage protection circuit breaker 113 is electrically connected to the fourth end of the first switch module 107, and the fourth end of the leakage protection circuit breaker 113 is used to connect to the second phase line of the three-phase AC power grid; the fifth end of the leakage protection circuit breaker 113 is connected to the fourth end of the first switch module 107. The sixth terminal of the first switch module 107 is electrically connected, and the sixth terminal of the leakage protection circuit breaker 113 is used to be externally connected to the first phase line in the three-phase AC power grid. When leakage occurs in the first single-phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103, the leakage protection circuit breaker will cut off the power supply circuit, that is, disconnect the three-phase AC power grid from the first single-phase charging module. The connection of the phase charging module 101, the second single-phase charging module 102 and the third single-phase charging module 103.

For example, as shown in Figure 6, assume that one end of the second switch module 108 is connected to an external load. At this time, the control module 106 receives a charging request sent by the load. The control module 106 determines that the load needs to be charged, and the control module 106 charges the first switch. The module 107 sends a first control signal, which instructs the first switch module 107 to turn on, and sends a second control signal to the second switch module 108, and the second control signal instructs the second switch module 108 to turn on. When the first switch module 107 receives the first control signal, it controls the first switch module 107 to be turned on. When the second switch module 108 receives the second control signal, it controls the second switch module 108 to be turned on, so that the entire charging control circuit conduction. At this time, the three-phase AC power grid begins to supply power to the first single-phase charging module 101, the second single-phase charging module 102, and the third single-phase charging module 103. The first single-phase charging module 101 can receive the third-phase line. The alternating current between the second phase line and the second phase line is converted into direct current and output through the first DC output terminal and the second DC output terminal of the first single-phase charging module 101; the second single-phase charging module 102 can receive the third The alternating current between the phase line and the first phase line is converted into direct current and output through the first DC output terminal and the second DC output terminal of the second single-phase charging module 102; the third single-phase charging module 103 can receive the third The alternating current between the two-phase line and the first-phase line is converted into direct current and output through the first DC output terminal and the second DC output terminal of the third single-phase charging module 103 . The direct current output by the first single-phase charging module 101, the second single-phase charging module 102, and the third single-phase charging module 103 is output through the first output terminal 104 and the second output terminal 105 to charge the load. Moreover, when the charging control circuit is turned on, the first current sampler 109 collects the output current I1 of the first single-phase charging module 101, the second current sampler 110 collects the output current I2 of the second single-phase charging module 102, and the third The current sampler 111 collects the output current I3 of the third single-phase charging module 103, and the voltage sampler 112 collects the output voltage U of the first single-phase charging module 101, the second single-phase charging module 102, and the third single-phase charging module 103, The control module 106 calculates Δ(I ₁ -I ₂ ), Δ(I 1 -I 3 ) and Δ(I 2 -I 3 ) respectively according to the output current I1, the output current I2 and the output current I3, and calculates Δ(I ₁ -I ₃ ) and Δ(I ₂ -I ₃ ) according to the output voltage U , calculate the difference between the output power of any two modules, namely U×Δ(I ₁ -I ₂ ), U×Δ(I ₁ -I ₃ ) and U×Δ(I ₂ -I ₃ ), if U If any one of ×Δ(I ₁ -I ₂ ), U×Δ(I ₁ -I ₃ ) and U×Δ(I ₂ -I ₃ ) exceeds the preset threshold, it is determined that a three-phase imbalance phenomenon occurs. At this time The control module 106 sends a second control signal to the second switch module 108. The second control signal instructs the second switch module 108 to turn off. After the second switch module 108 receives the second control signal, it controls The second switch module 108 is controlled to be turned off to stop charging the load. Moreover, the control module 106 can monitor the operating status of the first single-phase charging module 101, the second single-phase charging module 102, and the third single-phase charging module 103. If it is detected that the first single-phase charging module 101, the second single-phase charging module If any module in the module 102 and the third single-phase charging module 103 fails, it will cause three-phase imbalance, thereby affecting the stability of the three-phase AC power grid. Therefore, the control module 106 immediately sends a first control signal to the first switch module 107. The first control signal instructs the first switch module 107 to turn off. When the first switch module 107 receives the first control signal, it controls the first switch module 107. Disconnect, so that the first terminal of the first switch module 107 is disconnected from the second terminal, the third terminal is disconnected from the fourth terminal, and the fifth terminal is disconnected from the sixth terminal to stop charging the load; or, control The module 106 sends a second control signal to the second switch module 108. The second control signal instructs the second switch module 108 to turn off. After receiving the second control signal, the second switch module 108 controls the second switch module 108 to turn off. The first terminal and the second terminal, and the third terminal and the fourth terminal of the second switch module 108 are disconnected to stop charging the load, thereby ensuring three-phase balance.

Corresponding to the above embodiments, this application also provides an electronic device. Wherein, the electronic device includes the charging control circuit described in any one of the embodiments in FIGS. 1 to 6 .

The same and similar parts among the various embodiments in this specification can be referred to each other. In particular, for the terminal embodiment, since it is basically similar to the circuit embodiment, the description is relatively simple. For relevant details, please refer to the description in the circuit embodiment.

Claims

A charging control circuit, characterized by comprising: a first single-phase charging module, a second single-phase charging module, a third single-phase charging module, a first output terminal and a second output terminal;

The first AC input end of the first single-phase charging module and the first AC input end of the second single-phase charging module are used to connect to the third phase line of the three-phase AC power grid; the first single-phase charging The second AC input end of the module and the first AC input end of the third single-phase charging module are used to externally connect the second phase line in the three-phase AC power grid; the second AC input end of the second single-phase charging module The input terminal and the second AC input terminal of the third single-phase charging module are used to externally connect the first phase line of the three-phase AC power grid;

The ground terminal of the first single-phase charging module, the ground terminal of the second single-phase charging module and the ground terminal of the third single-phase charging module are used to externally connect the neutral line in the three-phase AC power grid;

The first DC output terminal of the first single-phase charging module, the first DC output terminal of the second single-phase charging module, and the first DC output terminal of the third single-phase charging module are connected to the first DC output terminal of the first single-phase charging module. The first output terminal is electrically connected to the second DC output terminal of the first single-phase charging module, the second DC output terminal of the second single-phase charging module and the second DC output of the third single-phase charging module. terminal is electrically connected to the second output terminal;

The first output terminal and the second output terminal are used for external loads.
The circuit according to claim 1, further comprising: a control module, a first switch module, and a second switch module;

The first output end of the control module is electrically connected to the control end of the first switch module, and the second output end of the control module is electrically connected to the control end of the second switch module;

The first end of the first switch module is electrically connected to the first AC input end of the first single-phase charging module and the first AC input end of the second single-phase charging module. The second end is used to connect to the third phase line in the external three-phase AC power grid;

The third end of the first switch module is electrically connected to the second AC input end of the first single-phase charging module and the first AC input end of the third single-phase charging module. The fourth terminal is used to connect to the second phase line in the external three-phase AC power grid;

The fifth terminal of the first switch module is electrically connected to the second AC input terminal of the second single-phase charging module and the second AC input terminal of the third single-phase charging module. The sixth terminal is used to connect to the first phase line in the external three-phase AC power grid;

The first DC output terminal of the first single-phase charging module, the first DC output terminal of the second single-phase charging module, and the first and second DC output terminals of the third single-phase charging module. The first end of the switch module is electrically connected; the second end of the second switch module is electrically connected to the first output end;

The second DC output terminal of the first single-phase charging module, the second DC output terminal of the second single-phase charging module, the second DC output terminal of the third single-phase charging module and the second switch module The third terminal is electrically connected; the fourth terminal of the second switch module is electrically connected to the second output terminal.
The circuit of claim 2, wherein the first switch module includes an AC contactor or a three-pole single-throw switch; and the second switch module includes a DC contactor or a double-pole single-throw switch.
The circuit of claim 2, wherein the first switch module includes a first switch sub-module, a second switch sub-module and a third switch sub-module; the second switch module includes a fourth switch sub-module and the fifth switch submodule;

The control terminals of the first switch sub-module, the second switch sub-module and the third switch sub-module are electrically connected to the first output terminal of the control module; the control of the fourth switch sub-module and the fifth switch sub-module The terminal is electrically connected to the second output terminal of the control module;

The first end of the first switch sub-module is electrically connected to the first AC input end of the first single-phase charging module and the first AC input end of the second single-phase charging module. The first switch sub-module The second end of the module is used to connect to the third phase line in the external three-phase AC power grid;

The first end of the second switch sub-module is electrically connected to the second AC input end of the first single-phase charging module and the first AC input end of the third single-phase charging module. The second switch sub-module The second end of the module is used to connect to the second phase line in the external three-phase AC power grid;

The first end of the third switch sub-module is electrically connected to the second AC input end of the second single-phase charging module and the second AC input end of the third single-phase charging module. The third switch sub-module The second end of the module is used to connect to the first phase line of the external three-phase AC power grid;

The first DC output terminal of the first single-phase charging module, the first DC output terminal of the second single-phase charging module, and the first DC output terminal of the third single-phase charging module are connected to the first DC output terminal of the first single-phase charging module. The first end of the fourth switch sub-module is electrically connected; the second end of the fourth switch sub-module is electrically connected to the first output end;

The second DC output terminal of the first single-phase charging module, the second DC output terminal of the second single-phase charging module, the second DC output terminal of the third single-phase charging module and the fifth switch The first end of the sub-module is electrically connected; the second end of the fifth switch sub-module is electrically connected to the second output end.
The circuit according to claim 4, characterized in that the first switch sub-module, the second switch sub-module, the third switch sub-module, the fourth switch sub-module and the fifth switch sub-module include single pole single throw switches or Thyristor.
The circuit according to claim 2, further comprising: a first current sampler, a second current sampler, a third current sampler and a voltage sampler;

The first output end of the first current sampler is electrically connected to the first input end of the control module, and the first output end of the second current sampler is electrically connected to the second input end of the control module, The first output end of the third current sampler is electrically connected to the third input end of the control module, and the output end of the voltage sampler is electrically connected to the fourth input end of the control module;

The first DC output terminal of the first single-phase charging module is electrically connected to the input terminal of the first current sampler, and the first DC output terminal of the second single-phase charging module is connected to the second current sampler. The input end of the sampler is electrically connected, the first DC output end of the third single-phase charging module is electrically connected to the input end of the third current sampler, and the input end of the voltage sampler is electrically connected to the first The second output terminal of the current sampler, the second output terminal of the second current sampler, the second output terminal of the third current sampler and the first terminal of the second switch module are electrically connected.
The circuit according to claim 6, wherein the control module includes: a comparator and a controller;

The first output terminal of the first current sampler is electrically connected to the first input terminal of the comparator, and the first output terminal of the second current sampler is electrically connected to the second input terminal of the comparator, The first output terminal of the third current sampler is electrically connected to the third input terminal of the comparator, the output terminal of the comparator is electrically connected to the first input terminal of the controller, and the voltage sampler The output terminal is electrically connected to the second input terminal of the controller;

The first output end of the controller is electrically connected to the control end of the first switch module, and the second output end of the controller is electrically connected to the control end of the second switch module.
The circuit according to claim 2, further comprising: a leakage protection circuit breaker;

The first end of the leakage protection circuit breaker is electrically connected to the second end of the first switch module, and the second end of the leakage protection circuit breaker is used to externally connect the third phase line in the three-phase AC power grid;

The third end of the leakage protection circuit breaker is electrically connected to the fourth end of the first switch module, and the fourth end of the leakage protection circuit breaker is used to externally connect the second phase line in the three-phase AC power grid;

The fifth terminal of the leakage protection circuit breaker is electrically connected to the sixth terminal of the first switch module, and the sixth terminal of the leakage protection circuit breaker is used to externally connect the first phase line in the three-phase AC power grid.
The circuit of claim 1, wherein the first single-phase charging module, the second single-phase charging module and the third single-phase charging module are of the same model.
The circuit of claim 6, wherein the first current sampler, the second current sampler, the third current sampler and the voltage sampler are integrated in the same chip.
The circuit of claim 10, wherein the first current sampler, the second current sampler, the third current sampler, and the voltage sampler are integrated in the control module.
An electronic device, characterized in that the electronic device includes the charging control circuit according to any one of claims 1-11.