Power conversion system

Abstract

The utility model provides a power conversion system. The power conversion system comprises power equipment, a converter and a power supply device, the power equipment comprises a plug and a controller, the plug is provided with a first conductive part, and the first conductive part is electrically connected with the controller; the converter is configured to be electrically connected with the power supply device and the plug, and a second conductive part is arranged on the converter; the controller is used for receiving a level signal generated by the contact of the first conductive part and the second conductive part, and the level signal is used for controlling the power equipment to enter a current limiting mode. The utility model aims to solve the technical problem that how to ensure that the current passing through the panel does not exceed the rated current of the panel is the problem that needs to be solved urgently at present.

Description

Technical Field

[0001] The present application relates to the technical field of electric transmission equipment, and in particular to an electric power conversion system. Background Art

[0002] With the development of electric and hybrid vehicles, power supply equipment has been rapidly built. However, the charging interface of power supply equipment is not unified, so when the size of the power supply equipment plug does not match the power supply device (such as the power supply panel) (for example, a 16A plug cannot be inserted into a 10A panel), a converter is required to connect them.

[0003] However, the existing converter only converts the interface type between the plug and the power supply device (such as the power supply panel). When the panel (such as a 10A panel) that supplies power to the low-power device supplies power to the port (such as a 16A plug) of the high-power source device through the converter, the panel passes a current exceeding its own rated current for a long time, which can easily cause the circuit and panel to heat up and age, and even cause safety accidents such as fire. Therefore, how to ensure that the current passing through the panel does not exceed its own rated current in this case is an urgent problem to be solved. Utility Model Content

[0004] The present application provides a power conversion system, which aims to solve the technical problem of how to ensure that the current passing through the panel does not exceed its own rated current when it is determined that the panel that supplies power to a low-power device supplies power to a port of a high-power source device through a converter.

[0005] The present application proposes that the power conversion system includes: an electric power device, a converter and a power supply device; the electric power device includes a plug and a controller, the plug is provided with a first conductive part, and the first conductive part is electrically connected to the controller; the converter is configured to electrically connect the power supply device and the plug, and the converter is provided with a second conductive part; the controller is used to receive a level signal generated by the contact between the first conductive part and the second conductive part, and the level signal is used to control the electric power device to enter a current limiting mode.

[0006] In the technical solution of the embodiment of the present application, when the plug is electrically connected to the power supply device through the converter, the first conductive part on the plug contacts the second conductive part on the converter, generating a level signal. The controller receives the level signal; the level signal is used to control the power device to enter the current limiting mode, so that the power device reduces its own required current, thereby reducing the power supply current of the power supply device, ensuring that the current passing through the power supply device does not exceed its own rated current, avoiding heating and aging of the line and panel, and reducing the risk of safety accidents such as fire. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0008] Figure 1 This is a schematic diagram of a principle of a power conversion system in a current limiting mode provided by an embodiment of the present application;

[0009] Figure 2 is a schematic diagram of a signal generation principle of a power conversion system provided by an embodiment of the present application;

[0010] Figure 3 is a schematic diagram of the structure of power equipment in a power conversion system provided in an embodiment of the present application;

[0011] Figure 4 is a structural schematic diagram of a power conversion system provided by an embodiment of the present application under a normal current mode;

[0012] Figure 5 The embodiment of the present application provides a power conversion system. Figure 3 A structural schematic diagram of a corresponding converter;

[0013] Figure 6 is a schematic diagram of the structure of a plug in a power conversion system provided in an embodiment of the present application;

[0014] Figure 7 The embodiment of the present application provides a power conversion system. Figure 6 Another structural schematic diagram of the corresponding converter;

[0015] Figure 8 is another schematic diagram of a signal generation principle of a power conversion system provided in an embodiment of the present application;

[0016] Fig. 9 In the embodiment of this application Figure 7 A schematic diagram of the internal structure of the converter shown;

[0017] Fig.10 It is a schematic diagram of the principle of using a dedicated conversion connector in the power conversion system in the embodiment of the present application.

[0018] Reference numerals list

[0019]

[0020] DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present utility model.

[0022] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0023] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description". Any embodiment described in this application as "exemplary" is not necessarily to be construed as being preferred or advantageous over other embodiments. In order to enable any technician in the field to implement and use the utility model, the following description is given. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the utility model can be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid obscuring the description of the utility model with unnecessary details. Therefore, the utility model is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles and features disclosed in this application.

[0024] Combination Figures 1 to 3 As shown, an embodiment of the present application provides a power conversion system, which includes: a power device 100, a converter 300 and a power supply device 200.

[0025] like Figure 2 and Figure 3As shown, the power device 100 includes a plug 120 and a controller 140. The plug 120 is provided with a first conductive part C1, and the first conductive part C1 is electrically connected to the controller 140;

[0026] like Figure 1 and Figure 2 As shown, the converter 300 is configured to electrically connect the power supply device 200 and the plug 120, and a second conductive portion C2 is provided on the converter 300;

[0027] The controller 140 is used to receive a level signal generated by the contact between the first conductive part C1 and the second conductive part C2 , and the level signal is used to control the power device 100 to enter a current limiting mode.

[0028] In the technical solution of the embodiment of the present application, when the plug 120 is electrically connected to the power supply device 200 through the converter 300, the first conductive part C1 on the plug 120 contacts the second conductive part C2 on the converter 300, and a level signal is generated. The controller 140 receives the level signal; the level signal is used to control the power device 100 to enter the current limiting mode, so that the power device 100 reduces its own required current, thereby reducing the power supply current output by the power supply device 200, thereby ensuring that the current passing through the power supply device 200 (such as the power supply panel) does not exceed its own rated current, avoiding heating and aging of the line and panel, and reducing the risk of safety accidents such as fire.

[0029] In some embodiments, Figure 4 As shown, in the case where the power supply device 200 needs to be used to transmit electric energy to the power equipment 100, if the power supply device 200 matches the plug 120 model, the plug 120 is directly inserted into the power supply device 200 (such as a power supply panel). At this time, since the first conductive part C1 is in a non-conducting state, the power equipment 100 operates in a normal current mode; if the power supply device 200 does not match the plug 120 model, the plug 120 is inserted into the converter 300, and then the converter 300 is directly inserted into the power supply device 200 (such as a power supply panel). At this time, since the first conductive part C1 and the second conductive part C2 are conductive, a level signal is generated. After receiving the level signal, the controller confirms that the power supply device 200 that is powered at this time cannot load the power equipment 100, and therefore controls the power equipment 100 to enter the current limiting mode.

[0030] Further in the embodiment, the controller 140 can switch the operating parameters of the power components in the power device 100 according to the obtained level signal, and the operating parameters include current or voltage, so that the power device 100 can operate with different operating parameters when directly charged using the power supply device 200 or converted and charged through the converter 300, ensuring that electricity is used under normal electrical parameters and avoiding the operating current from exceeding the rated current of the power device (power supply panel).

[0031] In an embodiment, the power device 100 further includes a cable, and the cable is connected to the plug 120 .

[0032] As an optional implementation of the above embodiment, Figure 3 and Figure 6 As shown, the first conductive portion C1 includes a first contact 121. Figure 5 and Figure 7 As shown, the second conductive portion C2 includes a second contact 301. Figure 3 and Figure 5 As shown, the first contact 121 protrudes from the plug 120, and the second contact 301 is disposed in the converter 300. It can be understood that when the first contact 121 protrudes from the plug 120, the first contact 121 can be a micro-movement structure, which can be retracted when the direct power supply device 200 is connected so that the plug 120 and the power supply device 200 can be normally connected.

[0033] like Figure 6 and Figure 7 As shown, the second contact 301 is protruding from the converter 300, and the first contact 121 is disposed in the plug 120. When the power supply device 200 and the plug 120 need to be electrically connected through the converter 300, when the converter 300 electrically connects the power supply device 200 and the plug 120, the first contact 121 and the second contact 301 are in contact to generate the level signal.

[0034] As an alternative implementation of the above embodiment, the plug 120 has a first mating surface, and the converter 300 has a second mating surface. Figure 6 As shown, the plug 120 has a first receiving hole 120a, the opening of the first receiving hole 120a is arranged on the first mating surface, the first contact 121 is arranged in the first receiving hole 120a; the second contact 301 extends out of the second mating surface from the converter 300. In this embodiment, when the power supply device 200 and the plug 120 need to be electrically connected through the converter 300, the second contact 301 extends into the first receiving hole 120a and contacts with the first contact 121 to generate a level signal.

[0035] Or, if Figure 5As shown, the converter 300 has a second receiving hole 300a, the opening of which is arranged at the second mating surface; the second contact 301 is arranged in the second receiving hole 300a, and the first contact 121 extends out of the first mating surface from the plug 120. When the power supply device 200 and the plug 120 need to be electrically connected through the converter 300, the first contact 121 extends into the second receiving hole 300a and contacts the second contact 301 to generate a level signal. In this embodiment, the power supply device 200 is provided with an avoidance hole 200a for avoiding the first contact 121, so that when the plug 120 is connected to the power supply device 200, the first contact 121 can enter the avoidance hole 200a to ensure that the plug 120 and the power supply device 200 are firmly matched.

[0036] As an optional implementation of the above embodiment, when the converter 300 electrically connects the power supply device 200 and the plug 120, the first mating surface and the second mating surface contact each other. The contact between the first mating surface and the second mating surface can avoid leakage and improve the safety of electricity use.

[0037] As an optional implementation of the above embodiment, Figure 2 and Figure 3 As shown, the first conductive part C1 further includes a first signal line 122, one end of the first signal line 122 is connected to the first contact 121, and the other end is connected to the signal input line of the controller 140. In the embodiment, the first conductive part C1 is conductive with the second conductive part C2, and the generated level signal is input to the controller 140 through the first signal line 122, so that the controller 140 obtains the level signal.

[0038] As an optional implementation of the above embodiment, Fig. 9As shown, a partition wall is provided in the plug 120, and the partition wall divides the internal space of the plug 120 into a first space and a second space; wherein the electrical transmission structure of the plug 120 is provided in the first space; and the first signal line 122 is provided in the second space. A partition wall 123 is provided in the plug 120, and the partition wall 123 divides the internal space of the plug 120 into a first space S1 and a second space S2. wherein the electrical transmission structure 124 of the plug 120 is provided in the first space S1; and the first signal line 122 is provided in the second space S2. In an embodiment, the electrical transmission structure 124 includes a live wire terminal, a live wire connection column, a neutral wire terminal, a neutral wire connection column, a ground wire terminal, and a ground wire connection column of the plug 120. The electrical transmission structure 124 adopts conventional technical means in the art. The electrical transmission structure is provided in the first space S1. The first signal line 122 is provided in the second space S2. The first receiving hole 120a of the first contact 121 is connected to the second space S2, and extends from the second space S2 through the first receiving hole 120a toward the first mating surface. To this end, the conductive structures and signal parts of the plug 120 and the converter 300 are separated from each other and do not affect each other, thereby improving reliability. In an embodiment, the first signal line 122 can be fixed on the wall of the second space S2 by a buckle or the like.

[0039] As an optional implementation of the above embodiment, Figure 2 and Figure 8 As shown, the second conductive part C2 includes a second signal line 302, one end of the second signal line 302 is connected to the second contact 301, and the other end is grounded. In the embodiment, when the first conductive part C1 and the second conductive part C2 are not conductive (when the plug 120 is directly connected to the power supply device 200), the first conductive part C1 is not grounded through the second conductive part C2, and the controller 140 does not receive the level signal; when the first conductive part C1 and the second conductive part C2 are conductive (the plug 120 is connected to the power supply device 200 through the converter 300), the first conductive part C1 is grounded through the second signal line 302 of the second conductive part C2, and the controller 140 obtains the level signal.

[0040] In some embodiments, the second conductive portion C2 may be grounded, for example, directly grounded, or may be, for example, Figure 1 As shown, the second signal line 302 of the second conductive part C2 is connected to the ground line E of the converter 300. In an embodiment, the converter 300 has three phases; the second conductive part C2 is directly connected to the ground line E of the converter 300.

[0041] In the above embodiment, when the plug 120 is connected to the converter 300, the first conductive part C1 and the second conductive part C2 are turned on, and the first conductive part C1 is grounded, so that the controller 140 obtains a level signal. When the plug 120 is connected to the power supply device 200, the first conductive part C1 is in an ungrounded state.

[0042] In some embodiments, the first conductive portion C1 includes a first signal line 122 and a first contact 121 connected to the first signal line 122. The other end of the first signal line 122 is connected to the signal input line 151 of the controller 140. Figure 8 As shown, the second conductive part C2 includes a second signal line 302 and a second contact 301 connected to the second signal line 302, and the second signal line 302 is grounded. In this embodiment, after the first contact 121 and the second contact 301 are in contact with each other, the first conductive part C1 is connected to the ground through the second conductive part C2, so that the current on the signal input line 151 enters the ground through the first conductive part C1 and the second conductive part C2, so that the controller 140 obtains a level signal, and then the controller 140 controls the power device 100 to enter the current limiting mode.

[0043] As an optional implementation of the above embodiment, Fig. 9 As shown, as an optional implementation of the above embodiment, the plug 120 has a plurality of conductive sheets arranged on the first mating surface. In the first mating surface, the projection of the first accommodating hole 120a is located outside the range defined by the projections of the plurality of conductive sheets. That is, in the embodiment, in the first mating surface, the projection of the first contact 121 is located outside the range defined by the projections of the plurality of conductive sheets, so as to avoid interference of the conductive sheets with the first contact 121 after conduction, thereby improving safety and reliability. In the embodiment, the plug 120 is generally a three-phase plug 120, so there are three conductive sheets, and the conductive sheets define a triangular area. The first accommodating hole 120a is arranged in an area outside the triangular area.

[0044] In some embodiments, the converter is a 10A / 16A converter, the front end of the converter is a pin of a size corresponding to 10A, and the rear end is a socket of a size corresponding to 16A. The power device 100 with a 16A plug can be plugged into a power supply device 200 with a 10A socket through this 10A / 16A converter.

[0045] In some special cases, when the power supply device 200 is a charging gun, although the power supply panel on the charging gun is 16A and the plug 120 is also 16A, a dedicated conversion connector 400 is still required to match the charging gun because of the mismatch in shape. In this case, the power conversion system of the embodiment of the present application also provides a dedicated conversion connector. Fig.10 As shown, the conversion connector 400 is configured to be detachable from the plug 120. In the power-on state, the plug 120 is connected to the conversion connector 400. However, since the power supply panel on the charging gun is consistent with the power supply panel used in normal situations, it is not necessary to set the second conductive part on the conversion connector 400. The first conductive part C1 is in a non-conductive state, and the controller 140 does not receive a level signal. Therefore, the controller 140 controls the power component to work according to the working parameters of the normal current mode.

[0046] The embodiment of the present application also proposes an electric device. The electric device includes an electric power conversion system. In, when the electric device 100 needs electricity, if the power supply device 200 (power supply panel) matches the plug 120 model, the power supply panel is used; if the power supply device 200 (power supply panel) does not match the plug 120 model, the plug 120 is inserted into the converter 300 and then the converter 300 is inserted into the power supply device 200 (power supply panel) for charging. When the plug 120 is electrically connected to the power supply device 200 through the converter 300, the first conductive part C1 on the plug 120 contacts the second conductive part C2 on the converter 300 to generate a level signal. The controller 140 receives the level signal; the level signal is used to control the electric device 100 to enter the current limiting mode to reduce the power supply current, thereby ensuring that the current passing through the power supply device 200 (such as the power supply panel) does not exceed its own rated current, avoiding heating and aging of the line and panel, and reducing the risk of safety accidents such as fire.

[0047] In some embodiments, Figure 2 As shown, the power device 100 also includes a signal output terminal 150; the signal output terminal 150 is connected to the controller 140 through the signal input line 151. In the embodiment, the converter 300 is provided with a second conductive part C2; at this time, if the power supply device 200 matches the plug 120 model, the first conductive part C1 is not turned on, and the power device 100 is in a normal current mode; if the power supply device 200 (power supply panel) does not match the plug 120 model, the converter 300 is used for conversion. Since the second conductive part C2 is provided on the converter 300, when the plug 120 is connected to the converter 300, the first conductive part C1 is grounded through the second conductive part C2, and the controller 140 obtains a level signal. At this time, the controller 140 controls the power device 100 to enter the normal current mode based on the level signal.

[0048] In an embodiment, the power equipment 100 may be an electric vehicle, and the power supply device may be a charging gun or a civilian power supply.

[0049] The above is a detailed introduction to an electric power conversion system and an electric power device provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for technical personnel in this field, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A power conversion system, characterized in that: The power conversion system comprises: power equipment, a converter and a power supply device; The electric power equipment comprises a plug and a controller, the plug is provided with a first conductive part, and the first conductive part is electrically connected to the controller; The converter is configured to electrically connect the power supply device and the plug, and a second conductive part is provided on the converter; The controller is used to receive a level signal generated by the contact between the first conductive part and the second conductive part, and the level signal is used to control the power device to enter a current limiting mode; Wherein, the first conductive part comprises a first contact, and the second conductive part comprises a second contact; The first contact is protruded from the plug, and the second contact is arranged in the converter; or the second contact is protruded from the converter, and the first contact is arranged in the plug.

2. The power conversion system according to claim 1, characterized in that The plug has a first mating surface, and the converter has a second mating surface; The plug has a first receiving hole, the opening of the first receiving hole is arranged on the first mating surface, the first contact is arranged in the first receiving hole, and the second contact extends from the converter to the second mating surface; or The converter has a second accommodating hole, the opening of the second accommodating hole is arranged on the second mating surface, the second contact is arranged in the second accommodating hole, and the first contact extends out of the first mating surface from the plug.

3. The power conversion system according to claim 2, characterized in that: When the converter electrically connects the power supply device and the plug, the first mating surface and the second mating surface contact each other.

4. The power conversion system according to claim 1, wherein: The first conductive part further includes a first signal line, one end of which is connected to the first contact, and the other end of which is connected to a signal input line of the controller.

5. The power conversion system according to claim 4, characterized in that: A partition wall is provided in the plug, and the partition wall divides the internal space of the plug into a first space and a second space; The electrical transmission structure of the plug is arranged in the first space; and the first signal line is arranged in the second space.

6. The power conversion system according to any one of claims 1 to 5, characterized in that: The second conductive part includes a second signal line, one end of the second signal line is connected to the second contact, and the other end of the second signal line is grounded.

7. The power conversion system according to claim 6, characterized in that: The second signal line is connected to a ground line on the converter.

8. The power conversion system according to claim 2 or 3, characterized in that: The plug has a plurality of conductive sheets arranged on the first mating surface; within the first mating surface, the projection of the first contact is located outside a range defined by the projections of the plurality of conductive sheets.

9. The power conversion system according to claim 1, wherein: The converter is a 10A / 16A converter.

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