WO2021012224A1

WO2021012224A1 - Three-phase charging circuit compatible with single-phase input, and related device

Info

Publication number: WO2021012224A1
Application number: PCT/CN2019/097537
Authority: WO
Inventors: 谢飞; 胡定高; 吴壬华
Original assignee: 深圳欣锐科技股份有限公司
Priority date: 2019-07-24
Filing date: 2019-07-24
Publication date: 2021-01-28
Also published as: CN111527006A

Abstract

The present application discloses a three-phase input charging circuit compatible with single-phase input and a related device. The circuit comprises: a first input circuit, a second input circuit and a third input circuit, the first input circuit, the second input circuit, and the third input circuit being connected in parallel, and the first input circuit, the second input circuit, and the third input circuit being connected to the same neutral wire. By implementing the embodiments of the present application, output power of a circuit can be improved, and the embodiments of the present application have the advantage of good user experience.

Description

Three-phase charging circuit and related equipment compatible with single-phase input

Technical field

This application relates to the field of new energy vehicles, in particular to a three-phase charging circuit compatible with single-phase input and related equipment.

Background technique

With the rapid development of technology and the rapid development of the new energy vehicle industry, more and more people choose to buy new energy vehicles. Therefore, the requirements for the cruising range and charging time of new energy vehicles are also increasing. The capacity of the battery is getting bigger and bigger.

At present, when charging new energy vehicles, single-phase charging piles are widely used in the market. However, new energy vehicles equipped with large-capacity batteries need to be charged on three-phase charging piles, and cannot be charged on single-phase charging piles. Therefore, the charging process of a new energy vehicle equipped with a large-capacity battery is complicated and the user experience is low.

Summary of the invention

The present application provides a three-phase charging circuit and related equipment compatible with single-phase input, which are used to enable a single-phase charging pile to charge a new energy vehicle equipped with a large-capacity battery, simplify the charging process of the large-capacity battery, and improve user experience.

The first aspect of the present application provides a three-phase charging circuit compatible with single-phase input, the circuit including: a first input circuit, a second input circuit, and a third input circuit;

The first input circuit, the second input circuit, and the third input circuit are connected in parallel, and the first input circuit, the second input circuit, and the third input circuit are connected to the same neutral line.

With reference to the first aspect of the present application, in a possible implementation manner of the first aspect of the present application, the first input circuit includes: a first resistor, a first switch, a first detection circuit, a fourth switch, and a first power A factor correction circuit and a first boost circuit; one end of the first resistor is connected to an external first input interface, one end of the first switch is connected to the first detection circuit, and the other end of the first switch is connected to The other end of the first resistor is connected to the first selection end of the fourth switch, the first input port of the first power factor correction circuit is connected to the neutral line, and the fixed end of the fourth switch is connected to The second input port of the first power factor correction circuit is connected, the first output port of the first power factor correction circuit is connected to the first input port of the first boost circuit, and the first power factor correction The second output port of the circuit is connected to the second input port of the first booster circuit, the first output port of the first booster circuit is connected to the first output port of the external battery pack, and the first booster The second output port of the circuit is connected to the second input port of the external battery pack.

In a possible implementation manner, the second input circuit includes: a second resistor, a second switch, a second detection circuit, a fifth switch, a second power factor correction circuit, and a second boost circuit; One end of the two resistors is connected to the external second input interface, one end of the second switch is connected to the second detection circuit, the other end of the second switch is connected to the other end of the second resistor and the fifth The first selection terminal of the switch is connected, the first input port of the second power factor correction circuit is connected to the neutral line, and the fixed terminal of the fifth switch is connected to the second input port of the second power factor correction circuit Connected, the first output port of the second power factor correction circuit is connected to the first input port of the second booster circuit, and the second output port of the second power factor correction circuit is connected to the second booster The second input port of the circuit is connected, the first output port of the second boost circuit is connected to the first output port of the external battery pack, and the second output port of the second boost circuit is connected to the external battery The second input port of the packet is connected.

In a possible implementation manner, the third input circuit includes: a third resistor, a third switch, a third detection circuit, a sixth switch, a third power factor correction circuit, and a third boost circuit; One end of the three resistors is connected to the external third input interface, one end of the third switch is connected to the second detection circuit, the other end of the third switch is connected to the other end of the third resistor and the sixth The first selection terminal of the switch is connected, the first input port of the third power factor correction circuit is connected to the neutral line, and the fixed terminal of the sixth switch is connected to the second input port of the third power factor correction circuit Connected, the first output port of the third power factor correction circuit is connected to the first input port of the third booster circuit, and the second output port of the third power factor correction circuit is connected to the third booster circuit The second input port of the circuit is connected, the first output port of the third boost circuit is connected to the first output port of the external battery pack, and the second output port of the third boost circuit is connected to the external battery The second input port of the packet is connected.

In a possible implementation manner, the parallel connection of the first input circuit, the second input circuit, and the third input circuit includes: the second selection terminal of the fourth switch and the fifth The fixed terminal of the switch is connected, the second selection terminal of the fifth switch is connected with the fixed terminal of the sixth switch, and the second selection terminal of the sixth switch is connected with the fixed terminal of the fourth switch.

In a possible implementation manner, the first switch, the second switch, and the third switch are all normally open relays.

In a possible implementation manner, the fifth switch and the sixth switch of the fourth switch are both normally closed relays.

In a possible implementation manner, the first resistor, the second resistor, and the third resistor are all precharge resistors, wherein the precharge resistor includes one or more of the following: aluminum housing resistor, Thermistor, power resistor, cement resistor.

A second aspect of the present application provides a single-phase input compatible three-phase charging device, which includes the single-phase input compatible three-phase input charging circuit as described in the first aspect.

A third aspect of the present application provides an in-vehicle device, which includes the single-phase input compatible three-phase charging device as described in the second aspect.

The three-phase charging circuit compatible with single-phase input provided by the present application is connected in parallel through a first input circuit, a second input circuit, and a third input circuit, and the first input circuit, the second input circuit, and the third input circuit are connected to the same zero The wire constitutes a three-phase charging circuit compatible with single-phase input, which realizes that the three working branches can work at the same time when only single-phase input is used, which increases the output power and realizes that the single-phase charging pile can charge new energy vehicles with large-capacity batteries. , Simplify the charging process of large-capacity batteries and improve user experience.

Description of the drawings

In order to more clearly describe the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.

FIG. 1 is a schematic diagram of a circuit structure of a three-phase charging compatible with single-phase input provided by an embodiment of the present application;

2 is a schematic structural diagram of another three-phase charging circuit compatible with single-phase input provided by an embodiment of the present application;

3 is a schematic diagram of the circuit structure of the first input circuit 101 provided by an embodiment of the present application;

4 is a schematic diagram of the circuit structure of the second input circuit 102 provided by an embodiment of the present application;

FIG. 5 is a schematic diagram of the circuit structure of the third input circuit 103 provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of them. Based on the implementation manners in this application, all other implementation manners obtained by those of ordinary skill in the art without creative work fall within the protection scope of this application.

The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific sequence. In addition, the terms "including" and "having" and any variations of them are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes unlisted steps or units, or optionally also includes Other steps or units inherent to these processes, methods, products or equipment.

The reference to "embodiments" in this application means that a specific feature, structure or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art clearly and implicitly understand that the embodiments described in this application can be combined with other embodiments.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a three-phase charging circuit structure compatible with single-phase input provided by an embodiment of the present application. As shown in FIG. 1, the circuit includes: a first input circuit 101, a second input circuit 102 and a third input circuit 103.

Optionally, the first input circuit 101 includes: a first resistor R1, a first switch K1, a first detection circuit, a fourth switch K4, a first power factor correction circuit, and a first booster circuit, where the first resistor R1 One end of the first switch K1 is connected to the external first input interface L1, one end of the first switch K1 is connected to the first detection circuit, the other end of the first switch K1 is connected to the other end of the first resistor R1, and the other end of the first resistor R1 Connected to the first selection terminal 42 of the fourth switch K4, the first input port of the first power factor correction circuit is connected to the neutral port N, and the fixed terminal 41 of the fourth switch K4 is connected to the second input of the first power factor correction circuit The fixed terminal 41 of the fourth switch K4 is connected to the second selection terminal 43 of the fourth switch K4, the first output port of the first power factor correction circuit is connected to the first input port of the first boost circuit, and the first The second output port of the power factor correction circuit is connected to the second input port of the first boost circuit, the first output port of the first boost circuit is connected to the first output port of the external battery pack, and the first output port of the first boost circuit The second output port is connected to the second input port of the external battery pack.

Optionally, the second input circuit 102 includes: a second resistor R2, a second switch K2, a second detection circuit, a fifth switch K5, a second power factor correction circuit, and a second boost circuit, where the second resistor R2 One end of the second switch K2 is connected to the external second input interface L2, one end of the second switch K2 is connected to the second detection circuit, the other end of the second switch K2 is connected to the other end of the second resistor R2, and the other end of the second resistor R2 Connected to the first selection terminal 52 of the fifth switch K5, the first input port of the second power factor correction circuit is connected to the neutral port N, and the fixed terminal 51 of the fifth switch K5 is connected to the second input of the second power factor correction circuit The fixed terminal 51 of the fifth switch K5 is connected to the second selection terminal 53 of the fifth switch K5, the first output port of the second power factor correction circuit is connected to the first input port of the second boost circuit, and the second The second output port of the power factor correction circuit is connected to the second input port of the second boost circuit, the first output port of the second boost circuit is connected to the first output port of the external battery pack, and the second output port of the second boost circuit The second output port is connected to the second input port of the external battery pack.

Optionally, the third input circuit 103 includes: a third resistor R3, a third switch K3, a third detection circuit, a sixth switch K6, a third power factor correction circuit, and a third boost circuit, wherein the third resistor R3 One end of the third switch K3 is connected to the external third input interface L3, one end of the third switch K3 is connected to the second detection circuit, the other end of the third switch K3 is connected to the other end of the third resistor R3, and the other end of the third resistor R3 Connected to the first selection terminal 62 of the sixth switch K6, the first input port of the third power factor correction circuit is connected to the neutral port N, and the fixed terminal 61 of the sixth switch K6 is connected to the second input of the third power factor correction circuit The fixed terminal 61 of the sixth switch K6 is connected to the second selection terminal 63 of the sixth switch K6, the first output port of the third power factor correction circuit is connected to the first input port of the third boost circuit, and the third The second output port of the power factor correction circuit is connected to the second input port of the third boost circuit, the first output port of the third boost circuit is connected to the first output port of the external battery pack, and the first output port of the third boost circuit The second output port is connected to the second input port of the external battery pack.

Optionally, the parallel connection of the first input circuit 101, the second input circuit 102, and the third input circuit 103 includes: the second selection terminal 43 of the fourth switch K4 is connected to the fixed terminal 51 of the fifth switch K5, and the fifth switch K5 The second selection terminal 53 of the sixth switch K6 is connected to the fixed terminal 61 of the sixth switch K6, and the second selection terminal 63 of the sixth switch K6 is connected to the fixed terminal 41 of the fourth switch K4.

Optionally, the three-phase charging circuit compatible with single-phase input further includes: the first switch K1, the second switch K2, and the third switch K3 are all normally open relays.

Optionally, the three-phase charging circuit compatible with single-phase input further includes: the fourth switch K4, the fifth switch K5, and the sixth switch K6 are all normally closed relays.

Optionally, the three-phase charging circuit compatible with single-phase input further includes: the first resistor, the second resistor, and the third resistor are all precharge resistors, where the precharge resistor includes one or more of the following: aluminum shell resistor, Thermistor, power resistor, cement resistor.

The three-phase charging circuit compatible with single-phase input provided by the embodiment of the application has three working states, which are specifically as follows:

The first state is that when the external first input port L1, the external second input port L2, and the external third input port L3 all detect the input voltage, the fourth switch K4, the fifth switch K5, and the sixth switch K6 are all closed, that is, the first The fixed terminal 41 of the four switch K4 is connected with the first selection terminal 42 of the fourth switch K4, the fixed terminal 51 of the fifth switch K5 is connected with the first selection terminal 52 of the fifth switch K5, and the fixed terminal 61 of the sixth switch K6 is connected with The first selection terminal 62 of the sixth switch K6 is connected, and the first input circuit 101, the second input circuit 102, and the third input circuit 103 form three independent working branches to start precharging. The input circuit 102 and the third input circuit 103 are precharged, and the first switch K1, the second switch K2, and the third switch K3 are closed. When the first input circuit 101, the second input circuit 102, and the third input circuit 103 work normally, Output maximum power voltage;

The second state is that the input voltage is detected at any one of the external first input port L1, the external second input port L2, and the external third input port L3.

In an implementation manner provided by the embodiment of the present application, when the external first input port L1 has an input voltage, the fourth switch K4 is closed, that is, the fixed terminal 41 of the fourth switch K4 and the first selection terminal 42 of the fourth switch K4 Connected, the voltage of the external first input port L1 pre-charges the first input circuit 101, the second input circuit 102 is charged through the normally closed contacts of the fourth switch K4 and the sixth switch K6, and the second input circuit 102 is charged through the fourth switch K4, The normally closed contacts of the fifth switch K5 and the sixth switch K6 precharge the third input circuit 103. After the precharge is completed, the first switch K1 is closed, the first input circuit 101, the second input circuit 102, and the third input The circuit 103 shares the input voltage of the external first input port L1 and works normally at the same time, and outputs the maximum power;

In an implementation manner provided by the embodiment of the present application, when the external second input port L2 has an input voltage, the fifth switch K5 is closed, that is, the fixed terminal 51 of the fifth switch K5 and the first selection terminal 52 of the fifth switch K5 Connected, the voltage of the external second input port L2 precharges the second input circuit 102, the first input circuit 101 is charged through the normally closed contacts of the fifth switch K5 and the fourth switch K4, and the first input circuit 101 is charged through the fifth switch K5, The normally closed contacts of the fourth switch K4 and the sixth switch K6 precharge the third input circuit 103. After the precharge is completed, the second switch K2 is closed, the first input circuit 101, the second input circuit 102, and the third input The circuit 103 shares the input voltage of the external second input port L2 and works normally at the same time, and outputs the maximum power;

In an implementation manner provided by the embodiment of the present application, when the external third input port L3 has an input voltage, the sixth switch K6 is closed, that is, the fixed terminal 61 of the sixth switch K6 and the first selection terminal 62 of the sixth switch K6 Connected, the voltage of the external third input port L3 precharges the third input circuit 103, the second input circuit 102 is charged through the normally closed contacts of the sixth switch K6 and the fifth switch K5, and the second input circuit 102 is charged through the sixth switch K6, The normally closed contacts of the fifth switch K5 and the fourth switch K4 precharge the first input circuit 101. After the precharge is completed, the third switch K3 is closed, the first input circuit 101, the second input circuit 102, and the third input The circuit 103 shares the input voltage of the external third input port L3 and works normally at the same time, and outputs the maximum power.

The third state is that any two ports of the external first input port L1, the external second input port L2, and the external third input port L3 detect the input voltage.

In an implementation manner provided by the embodiment of the present application, when the external first input port L1 and the external second input port L2 have input voltage, the fourth switch K4 and the fifth switch K5 are both closed, that is, the fourth switch K4 The fixed terminal 41 is connected to the first selection terminal 42 of the fourth switch K4, the fixed terminal 51 of the fifth switch K5 is connected to the first selection terminal 52 of the fifth switch K5, and the voltage of the external first input port L1 is related to the first input circuit 101 is precharged, the third input circuit 103 is precharged through the normally closed contacts of the fourth switch K4 and the sixth switch K6, and the second input circuit 102 is precharged by the voltage of the external second input port L2. After completion, the first switch K1 and the second switch K2 are closed. The first input circuit 101 and the third input circuit 103 share the input voltage of the external first input port L1 and work normally at the same time. The second input circuit 102 works normally with the maximum output power;

In an implementation manner provided by the embodiment of the present application, when the external first input port L1 and the external third input port L3 have input voltage, the fourth switch K4 and the sixth switch K6 are both closed, that is, the fourth switch K4 The fixed terminal 41 is connected to the first selection terminal 42 of the fourth switch K4, the sixth switch K6 is closed, that is, the fixed terminal 61 of the sixth switch K6 is connected to the first selection terminal 62 of the sixth switch K6, and the external first input port L1 The voltage precharges the first input circuit 101, the voltage of the external third input port L3 precharges the third input circuit 103, and the second input circuit 102 is precharged through the normally closed contacts of the sixth switch K6 and the fifth switch K5. Perform pre-charging. After the pre-charging is completed, close the first switch K1 and the third switch K3, the first input circuit 101 works normally, the third input circuit 103 and the second input circuit 102 share the input voltage of the external third input port L3 and Work normally at the same time, output maximum power;

In an implementation manner provided by the embodiments of the present application, when the external second input port L2 and the external third input port L3 have input voltage, the fifth switch K5 and the sixth switch K6 are both closed, that is, the fifth switch K5 The fixed terminal 51 is connected to the first selection terminal 52 of the fifth switch K5, the sixth switch K6 is closed, that is, the fixed terminal 61 of the sixth switch K6 is connected to the first selection terminal 62 of the sixth switch K6, and the external second input port L2 The voltage precharges the second input circuit 102, the first input circuit 101 is precharged through the normally closed contacts of the fifth switch K5 and the fourth switch K4, and the voltage of the external third input port L3 charges the third input circuit 103 Perform pre-charging. After the pre-charging is completed, the second switch K2 and the third switch K3 are closed, the third input circuit 103 works normally, the second input circuit 102 and the first input circuit 101 share the input voltage of the external second input port L2 and At the same time, it works normally and outputs the maximum power.

Please refer to FIG. 2, which is a schematic structural diagram of another three-phase charging circuit compatible with single-phase input provided by an embodiment of the present application. As shown in FIG. 2, the circuit includes a first input circuit 101 and a second input circuit. 102. The third input circuit 103.

Optionally, the first input port of the first input circuit 101 is connected to the neutral port N, the second input port of the first input circuit 101 is connected to the external first input port L1, and the first output port of the first input circuit 101 It is connected to the first input port of the external battery pack, and the second output port of the first input circuit 101 is connected to the second input port of the external battery pack.

Optionally, the first input port of the second input circuit 102 is connected to the neutral port N, the second input port of the second input circuit 102 is connected to the external second input port L2, and the first output port of the second input circuit 102 It is connected to the first input port of the external battery pack, and the second output port of the second input circuit 102 is connected to the second input port of the external battery pack.

Optionally, the first input port of the third input circuit 103 is connected to the neutral port N, the second input port of the third input circuit 103 is connected to the external third input port L3, and the first output port of the third input circuit 103 It is connected to the first input port of the external battery pack, and the second output port of the third input circuit 103 is connected to the second input port of the external battery pack.

Optionally, the first input circuit 101, the second input circuit 102, and the third input circuit 103 are connected to each other.

It can be seen that this application forms three working branches by connecting three input circuits. When any branch has an input voltage, the three working branches start to work at the same time, and the output power of the three working branches The sum is the final output power of the entire circuit, which increases the output power and has a wide range of applications.

Please refer to FIG. 3, which is a schematic diagram of the circuit structure of the first input circuit 101 provided by an embodiment of the present application. As shown in FIG. 3, the first input circuit 101 includes: a first resistor R1, a first switch K1, and a first detection The circuit, the fourth switch K4, the first power factor correction circuit, and the first boost circuit.

Further, one end of the first resistor R1 is connected to the external first input interface L1, one end of the first switch K1 is connected to the first detection circuit, the other end of the first switch K1 is connected to the other end of the first resistor R1 and the The first selection terminal 42 of the four switch K4 is connected, the first input port of the first power factor correction circuit is connected to the neutral port N, and the fixed terminal 41 of the fourth switch K4 is connected to the second input port of the first power factor correction circuit , The fixed terminal 41 of the fourth switch K4 is connected to the second selection terminal 43 of the fourth switch K4, the first output port of the first power factor correction circuit is connected to the first input port of the first booster circuit, and the first power factor The second output port of the correction circuit is connected to the second input port of the first boost circuit, the first output port of the first boost circuit is connected to the first output port of the external battery pack, and the second output of the first boost circuit is The port is connected to the second input port of the external battery pack.

Please refer to FIG. 4, which is a schematic diagram of the circuit structure of the second input circuit 102 provided by an embodiment of the present application. As shown in FIG. 4, the second input circuit 102 includes a second resistor R2, a second switch K2, and a second detection. The circuit, the fifth switch K5, the second power factor correction circuit, and the second boost circuit.

Further, one end of the second resistor R2 is connected to the external second input interface L2, one end of the second switch K2 is connected to the second detection circuit, the other end of the second switch K2 is connected to the other end of the second resistor R2 and the first The first selection terminal 52 of the five switch K5 is connected, the first input port of the second power factor correction circuit is connected to the neutral port N, and the fixed terminal 51 of the fifth switch K5 is connected to the second input port of the second power factor correction circuit , The fixed terminal 51 of the fifth switch K5 is connected to the second selection terminal 53 of the fifth switch K5, the first output port of the second power factor correction circuit is connected to the first input port of the second boost circuit, and the second power factor The second output port of the correction circuit is connected to the second input port of the second boost circuit, the first output port of the second boost circuit is connected to the first output port of the external battery pack, and the second output of the second boost circuit is The port is connected to the second input port of the external battery pack.

Please refer to FIG. 5, which is a schematic diagram of the circuit structure of the third input circuit 103 provided by an embodiment of the present application. As shown in FIG. 5, the third input circuit 103 includes: a third resistor R3, a third switch K3, and a third detection. The circuit, the sixth switch K6, the third power factor correction circuit, and the third boost circuit.

Further, one end of the third resistor R3 is connected to the external third input interface L3, one end of the third switch K3 is connected to the second detection circuit, the other end of the third switch K3 is connected to the other end of the third resistor R3 and the The first selection terminal 62 of the six switch K6 is connected, the first input port of the third power factor correction circuit is connected to the neutral port N, and the fixed terminal 61 of the sixth switch K6 is connected to the second input port of the third power factor correction circuit , The fixed terminal 61 of the sixth switch K6 is connected to the second selection terminal 63 of the sixth switch K6, the first output port of the third power factor correction circuit is connected to the first input port of the third booster circuit, and the third power factor The second output port of the correction circuit is connected to the second input port of the third boost circuit, the first output port of the third boost circuit is connected to the first output port of the external battery pack, and the second output of the third boost circuit The port is connected to the second input port of the external battery pack.

The embodiment of the present application also provides a three-phase charging device compatible with single-phase input, including the aforementioned three-phase input charging circuit compatible with single-phase input.

An embodiment of the present application also provides an in-vehicle device, including the aforementioned three-phase charging device compatible with single-phase input.

It should be noted that for the foregoing application embodiments, for the sake of simple description, they are all expressed as a series of action combinations, but those skilled in the art should know that this application is not limited by the described sequence of actions. Because according to this application, some steps can be performed in other order or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

In the above-mentioned embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in an embodiment, reference may be made to related descriptions of other embodiments.

In the several embodiments provided in this application, it should be understood that the disclosed device may be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the above-mentioned units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components can be combined or integrated To another system, or some features can be ignored, or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical or other forms.

The units described above as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in each embodiment of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or software functional unit.

The embodiments of the application are described in detail above, and specific examples are used in this article to illustrate the principles and implementation of the application. The descriptions of the above embodiments are only used to help understand the application and its core ideas; at the same time, for the field According to the ideas of the application, the general technical personnel of, will have changes in the specific implementation and application scope. In summary, the content of this specification should not be construed as a limitation of the application.

Claims

A three-phase input charging circuit compatible with single-phase input, characterized in that the circuit includes: a first input circuit, a second input circuit, and a third input circuit;

The first input circuit, the second input circuit, and the third input circuit are connected in parallel, and the first input circuit, the second input circuit, and the third input circuit are connected to the same neutral line.
The circuit according to claim 1, wherein the first input circuit comprises: a first resistor, a first switch, a first detection circuit, a fourth switch, a first power factor correction circuit, and a first boost circuit ；

One end of the first resistor is connected to an external first input interface, one end of the first switch is connected to the first detection circuit, the other end of the first switch is connected to the other end of the first resistor and the The first selection terminal of the fourth switch is connected, the first input port of the first power factor correction circuit is connected to the neutral line, and the fixed terminal of the fourth switch is connected to the first power factor correction circuit. Two input ports are connected, the first output port of the first power factor correction circuit is connected to the first input port of the first boost circuit, and the second output port of the first power factor correction circuit is connected to the first The second input port of a boost circuit is connected, the first output port of the first boost circuit is connected to the first output port of the external battery pack, and the second output port of the first boost circuit is connected to the external The second input port of the battery pack is connected.
The circuit according to claim 1, wherein the second input circuit comprises: a second resistor, a second switch, a second detection circuit, a fifth switch, a second power factor correction circuit, and a second boost circuit ；

One end of the second resistor is connected to an external second input interface, one end of the second switch is connected to the second detection circuit, the other end of the second switch is connected to the other end of the second resistor and the The first selection terminal of the fifth switch is connected, the first input port of the second power factor correction circuit is connected to the neutral line, and the fixed terminal of the fifth switch is connected to the second power factor correction circuit. Two input ports are connected, the first output port of the second power factor correction circuit is connected to the first input port of the second boost circuit, and the second output port of the second power factor correction circuit is connected to the first The second input port of the second boost circuit is connected, the first output port of the second boost circuit is connected to the first output port of the external battery pack, and the second output port of the second boost circuit is connected to the The second input port of the external battery pack is connected.
The circuit according to claim 1, wherein the third input circuit comprises: a third resistor, a third switch, a third detection circuit, a sixth switch, a third power factor correction circuit, and a third boost circuit ；

One end of the third resistor is connected to an external third input interface, one end of the third switch is connected to the second detection circuit, the other end of the third switch is connected to the other end of the third resistor and the The first selection terminal of the sixth switch is connected, the first input port of the third power factor correction circuit is connected to the neutral line, and the fixed terminal of the sixth switch is connected to the second terminal of the third power factor correction circuit. Two input ports are connected, the first output port of the third power factor correction circuit is connected to the first input port of the third booster circuit, and the second output port of the third power factor correction circuit is connected to the first input port of the third power factor correction circuit. The second input port of the three boost circuit is connected, the first output port of the third boost circuit is connected to the first output port of the external battery pack, and the second output port of the third boost circuit is connected to the The second input port of the external battery pack is connected.
The circuit according to claim 1, wherein the parallel connection of the first input circuit, the second input circuit, and the third input circuit comprises:

The second selection terminal of the fourth switch is connected to the fixed terminal of the fifth switch, the second selection terminal of the fifth switch is connected to the fixed terminal of the sixth switch, and the second selection terminal of the sixth switch is connected to the fixed terminal of the sixth switch. The selection terminal is connected to the fixed terminal of the fourth switch.
The circuit according to claim 1, wherein the first switch, the second switch and the third switch are all normally open relays.
The circuit according to claim 1, wherein the fourth switch, the fifth switch and the sixth switch are all normally closed relays.
The circuit according to claim 1, wherein the first resistor, the second resistor, and the third resistor are all precharge resistors, wherein the precharge resistor includes one or more of the following: Aluminum shell resistance, thermistor, power resistance, cement resistance.
A three-phase input charging device compatible with single-phase input, wherein the single-phase input compatible three-phase input charging device comprises the single-phase input compatible three-phase input according to any one of claims 1-8 Charging circuit.
A vehicle-mounted equipment, characterized in that the vehicle-mounted equipment comprises the single-phase input compatible three-phase input charging device according to claim 9.