A DC dual-gun charging pile output power distribution circuit and dual-gun charging pile

Abstract

The present invention provides a DC dual-gun charging pile output power distribution circuit, comprising a first power supply branch, a second power supply branch and a third power supply branch, a gating module and a control center, wherein the output end of the third power supply branch is electrically connected to the input end of the gating module, the first gating output end of the gating module is electrically connected to the output end of the first power supply branch, and the second gating output end of the gating module is electrically connected to the output end of the second power supply branch. The control center is used to control the gating module to be in a first state, a second state or a third state, so that the charging power of the first charging gun will not be significantly reduced during the process of first using the first charging gun for charging and then using the second charging gun for charging at the same time.

Description

Technical Field

[0001] The present invention belongs to the field of charging technology, and more specifically, relates to a DC dual-gun charging pile output power distribution circuit and a dual-gun charging pile. Background Art

[0002] The two charging guns of the DC dual-gun charging pile can charge two new energy vehicles at the same time. The existing DC dual-gun charging pile includes a first rectifier module, a second rectifier module, a first charging gun, a second charging gun, a dual-charging power distribution circuit and a control circuit for controlling the dual-charging power distribution circuit. The control circuit is connected between the power supply end and the ground. The output end of the first rectifier module is connected to the first input end of the dual-charging power distribution circuit, the output end of the second rectifier module is connected to the second input end of the dual-charging power distribution circuit, the first output end of the dual-charging power distribution circuit is connected to the input end of the first charging gun, and the second output end of the dual-charging power distribution circuit is connected to the input end of the second charging gun. When one of the first charging gun and the second charging gun is selected for charging, the power of the first rectifier module and the second rectifier module are all output to the charging gun. At this time, the charging power of the charging gun is relatively large. Then, when the other charging gun is used for charging at the same time, the power of the first rectifier module and the power of the second rectifier module are respectively output to the corresponding charging gun, and the charging power of the charging gun is greatly reduced. Summary of the invention

[0003] One of the purposes of the present invention is to provide a DC dual-gun charging pile output power distribution circuit to solve the technical problem in the prior art that in the process of first using one charging gun for charging and then using another charging gun for charging at the same time, the charging power of the first charging gun will be greatly reduced.

[0004] To achieve one of the above purposes, the technical solution adopted by the present invention is: to provide a DC dual-gun charging pile output power distribution circuit, including a first power supply branch and a second power supply branch, the output end of the first power supply branch is used to electrically connect the first charging gun, and the output end of the second power supply branch is used to electrically connect the second charging gun. The DC dual-gun charging pile output power distribution circuit also includes a third power supply branch, a gating module and a control center. The output end of the third power supply branch is electrically connected to the input end of the gating module, the first gating output end of the gating module is electrically connected to the output end of the first power supply branch, and the second gating output end of the gating module is electrically connected to the output end of the second power supply branch. The control center is used to control the gating module to be in a first state, a second state or a third state. When the gating module is in the first state, the input end of the gating module is only connected to the first gating output end of the gating module. When the gating module is in the second state, the input end of the gating module is only connected to the second gating output end of the gating module. The input end of the gating module is simultaneously connected to the first gating output end of the gating module and the second gating output end of the gating module.

[0005] Further, the first power supply branch includes a first rectifier module and a first DC contactor, the second power supply branch includes a second rectifier module and a second DC contactor, and the third power supply branch includes a third rectifier module, a fourth DC contactor and a fifth DC contactor;

[0006] The output end of the first rectifier module is connected to one energized end of the first DC contactor, and the other energized end of the first DC contactor is electrically connected to the first charging gun;

[0007] The output end of the second rectifier module is connected to one energized end of the second DC contactor, and the other energized end of the second DC contactor is electrically connected to the second charging gun;

[0008] The first DC contactor, the second DC contactor, the fourth DC contactor and the fifth DC contactor are controlled by the control center to be closed or opened;

[0009] One energized end of the fourth DC contactor is electrically connected to the output end of the first rectifier module, and the other energized end of the fourth DC contactor is electrically connected to the output end of the third rectifier module;

[0010] One energized end of the fifth DC contactor is electrically connected to the output end of the second rectifier module, and the other energized end of the fifth DC contactor is electrically connected to the output end of the third rectifier module.

[0011] Furthermore, the DC dual-gun charging pile output power distribution circuit also includes a third DC contactor, one energized end of the third DC contactor is electrically connected to the output end of the first rectifier module, and the other energized end of the third DC contactor is electrically connected to the output end of the second rectifier module.

[0012] Furthermore, the DC dual-gun charging pile output power distribution circuit also includes a first shunt, one shunt end of the first shunt is electrically connected to one energized end of the first DC contactor, and the other shunt end of the first shunt is electrically connected to the other energized end of the first DC contactor.

[0013] Furthermore, the DC dual-gun charging pile output power distribution circuit also includes a first ammeter, and an input end of the first ammeter is electrically connected to an output end of the first shunt.

[0014] Furthermore, the DC dual-gun charging pile output power distribution circuit also includes a second shunt, one shunt end of the second shunt is electrically connected to one energized end of the second DC contactor, and the other shunt end of the second shunt is electrically connected to the other energized end of the second DC contactor.

[0015] Furthermore, the DC dual-gun charging pile output power distribution circuit also includes a second ammeter, and the input end of the second ammeter is electrically connected to the output end of the second shunt.

[0016] Furthermore, the DC dual-gun charging pile output power distribution circuit also includes a third fuse, one end of the third fuse is electrically connected to the output end of the third power supply branch, and the other end of the third fuse is electrically connected to the input end of the selection module.

[0017] Furthermore, the DC dual-gun charging pile output power distribution circuit also includes an AC contactor, which is controlled by the control center to be closed or opened, and one end of the AC contactor is electrically connected to the input end of the first rectifier module, the input end of the second rectifier module and the input end of each of the third rectifier modules.

[0018] The beneficial effect of the DC dual-gun charging pile output power distribution circuit provided by the present invention is that: compared with the prior art, when the user first uses the first charging gun to charge, the control center controls the selection module to be in the first state, so that the first charging gun is charged with the maximum charging power; then the user uses the second charging gun to charge at the same time, the control center puts the selection module in the third state, and part of the current of the third power supply branch flows to the second charging gun. Since the third power supply branch still has current flowing to the first charging gun, the charging power of the first charging gun will not be significantly reduced, ensuring that the first charging gun is charged quickly first.

[0019] The second object of the present invention is to provide a dual-gun charging pile. In order to achieve the second object, the technical solution adopted by the present invention is: to provide a dual-gun charging pile, including the above-mentioned DC dual-gun charging pile output power distribution circuit.

[0020] The beneficial effect of a dual-gun charging pile provided by the present invention is that, compared with the prior art, a DC dual-gun charging pile output power distribution circuit is adopted, and when a user first uses the first charging gun to charge and then uses the second charging gun to charge at the same time, the charging power of the first charging gun will not be significantly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic diagram of a DC dual-gun charging pile output power distribution circuit provided in an embodiment of the present invention;

[0023] Figure 2 A circuit diagram of a DC dual-gun charging pile output power distribution circuit provided by an embodiment of the present invention;

[0024] Figure 3 A circuit diagram of a dual-gun charging pile provided in an embodiment of the present invention.

[0025] Among them, the reference numerals in the figure are:

[0026] 1. First rectifier module; 2. Second rectifier module; 31. First DC contactor; 32. Second DC contactor; 33. Third DC contactor; 34. Fourth DC contactor; 35. Fifth DC contactor; 4. Third rectifier module; 5. Control center; 61. First fuse; 62. Second fuse; 63. Third fuse; 71. First shunt; 72. Second shunt; 81. First ammeter; 82. Second ammeter; 9. AC contactor; 101. First charging gun; 102. Second charging gun; 103. Circuit breaker; 104. AC power supply; 105. Access control device; 106. Lighting system; 107. Display screen; 1a. First power supply branch; 1b. Second power supply branch; 1c. Third power supply branch; 1d. Selection module. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] See also Figure 1 and Figure 2, now the output power distribution circuit of a DC dual-gun charging pile provided by the present invention is described. A DC dual-gun charging pile output power distribution circuit includes a first power supply branch 1a and a second power supply branch 1b, the output end of the first power supply branch 1a is used to electrically connect the first charging gun 101, and the output end of the second power supply branch 1b is used to electrically connect the second charging gun 102. The DC dual-gun charging pile output power distribution circuit also includes a third power supply branch 1c, a gating module 1d and a control center 5, the output end of the third power supply branch 1c is electrically connected to the input end of the gating module 1d, and the first gating output end of the gating module 1d is electrically connected to the output end of the first power supply branch 1a, and the gating module 1d is electrically connected to the output end of the first power supply branch 1a. The second enable output terminal of block 1d is electrically connected to the output terminal of the second power supply branch 1b. The control center 5 is used to control the enable module 1d to be in the first state, the second state or the third state. When the enable module 1d is in the first state, the input terminal of the enable module 1d is only connected to the first enable output terminal of the enable module 1d. When the enable module 1d is in the second state, the input terminal of the enable module 1d is only connected to the second enable output terminal of the enable module 1d. The input terminal of the enable module 1d is simultaneously connected to the first enable output terminal of the enable module 1d and the second enable output terminal of the enable module 1d.

[0032] The output power distribution circuit of a DC dual-gun charging pile provided by the present invention is compared with the prior art. When the user first uses the first charging gun 101 for charging, the control center 5 controls the selection module 1d to be in the first state, so that the first charging gun 101 is charged with the maximum charging power; then the user uses the second charging gun 102 for charging at the same time, and the control center 5 controls the selection module 1d to be in the third state, and part of the current of the third power supply branch 1c flows to the second charging gun 102. Since the third power supply branch 1c still has current flowing to the first charging gun 101, the charging power of the first charging gun 101 will not be significantly reduced, thereby ensuring that the first charging gun 101 is charged quickly first.

[0033] For further information, see Figure 1 and Figure 2 As a specific implementation of a DC dual-gun charging pile output power distribution circuit provided by the present invention, the first power supply branch 1a includes a first rectifier module 1 and a first DC contactor 31, the second power supply branch 1b includes a second rectifier module 2 and a second DC contactor 32, and the third power supply branch 1c includes a third rectifier module 4, a fourth DC contactor 34 and a fifth DC contactor 35;

[0034] The output end of the first rectifier module 1 is connected to one energized end of the first DC contactor 31 , and the other energized end of the first DC contactor 31 is electrically connected to the first charging gun 101 ;

[0035] The output end of the second rectifier module 2 is connected to one energized end of the second DC contactor 32 , and the other energized end of the second DC contactor 32 is electrically connected to the second charging gun 102 ;

[0036] The first DC contactor 31, the second DC contactor 32, the fourth DC contactor 34 and the fifth DC contactor 35 are controlled by the control center 5 to be closed or opened;

[0037] One energized end of the fourth DC contactor 34 is electrically connected to the output end of the first rectifier module 1 , and the other energized end of the fourth DC contactor 34 is electrically connected to the output end of the third rectifier module 4 ;

[0038] One energized end of the fifth DC contactor 35 is electrically connected to the output end of the second rectifier module 2 , and the other energized end of the fifth DC contactor 35 is electrically connected to the output end of the third rectifier module 4 .

[0039] For further information, see Figure 1 and Figure 2 As a specific implementation of a DC dual-gun charging pile output power distribution circuit provided by the present invention, the third power supply branch 1c is provided with multiple, so the third rectifier module 4 is provided with multiple, the fourth DC contactor 34 is provided with multiple, and the fifth DC contactor 35 is provided with multiple;

[0040] The first DC contactor 31, the second DC contactor 32, the third DC contactor 33, all the fourth DC contactors 34 and all the fifth DC contactors 35 are controlled by the control center 5 to be closed or opened;

[0041] All fourth DC contactors 34 correspond one-to-one to each third rectifier module 4;

[0042] All fifth DC contactors 35 correspond one to one with each third rectifier module 4;

[0043] One energized end of the third DC contactor 33 is electrically connected to the output end of the first rectifier module 1, and the other energized end of the third DC contactor 33 is electrically connected to the output end of the second rectifier module 2;

[0044] One energized end of each fourth DC contactor 34 is electrically connected to the output end of the first rectifier module 1, and the other energized end of the fourth DC contactor 34 is electrically connected to the output end of the corresponding third rectifier module 4;

[0045] One energized end of each fifth DC contactor 35 is electrically connected to the output end of the second rectifier module 2 , and the other energized end of the fifth DC contactor 35 is electrically connected to the output end of the corresponding third rectifier module 4 .

[0046] When the user first uses the first charging gun 101 for charging, the control center 5 controls the first DC contactor 31 and all the fourth DC contactors 34 to close, and the control center 5 also controls the second DC contactor 32 and all the fifth DC contactors 35 to open, so that the first charging gun 101 is charged with the maximum charging power; then the user uses the second charging gun 102 for charging at the same time, and the control center 5 closes the second DC contactor 32. The control center 5 controls some of the fourth DC contactors 34 to open according to the power demand of the new energy vehicle connected to the first charging gun 101 and the power demand of the new energy vehicle connected to the second charging gun 102, and closes the corresponding fifth DC contactors 35 of the opened fourth DC contactors 34, so that there is no need to significantly reduce the charging power of the first charging gun 101, and charging using the first charging gun 101 and the second charging gun 102 at the same time is achieved. When the new energy vehicle connected to the first charging gun 101 is fully charged, the control center 5 controls the first DC contactor 31 and all the fourth DC contactors 34 to be disconnected, and also controls the second DC contactor 32 and all the fifth DC contactors 35 to be closed, so that the second charging gun 102 can be charged at the maximum charging power.

[0047] For further information, see Figure 1 and Figure 2As a specific implementation of a DC dual-gun charging pile output power distribution circuit provided by the present invention, the DC dual-gun charging pile output power distribution circuit also includes a third DC contactor 33, one energized end of the third DC contactor 33 is electrically connected to the output end of the first rectifier module 1, and the other energized end of the third DC contactor 33 is electrically connected to the output end of the second rectifier module 2. When the user first uses the first charging gun 101 for charging, the control center 5 controls the first DC contactor 31, the third DC contactor 33 and all the fourth DC contactors 34 to close, and the control center 5 also controls the second DC contactor 32 and all the fifth DC contactors 35 to open, so that the first charging gun 101 The maximum charging power is used for charging; then the user uses the second charging gun 102 for charging at the same time, the control center 5 disconnects the third DC contactor 33 and closes the second DC contactor 32, and the control center 5 controls the disconnection of some of the fourth DC contactors 34 according to the power demand of the new energy vehicle connected to the first charging gun 101 and the power demand of the new energy vehicle connected to the second charging gun 102, and closes the disconnected fourth DC contactors 34 corresponding to the fifth DC contactor 35, so that there is no need to significantly reduce the charging power of the first charging gun 101, and the first charging gun 101 and the second charging gun 102 are used for charging at the same time. When the new energy vehicle connected to the first charging gun 101 is fully charged, the control center 5 controls the first DC contactor 31 and all the fourth DC contactors 34 to disconnect, and also controls the second DC contactor 32, the third DC contactor 33 and all the fifth DC contactors 35 to close, so that the second charging gun 102 is charged with the maximum charging power.

[0048] Specifically, the power demand of the new energy vehicle connected to the first charging gun 101 and the power demand of the new energy vehicle connected to the second charging gun 102 change in real time. The user sets a preset allocation rule according to the power demand of the new energy vehicle connected to the first charging gun 101 and the power demand of the new energy vehicle connected to the second charging gun 102. The control center 5 controls the number of fourth DC contactors 34 that are disconnected and the number of fifth DC contactors 35 that are closed according to the preset allocation rule.

[0049] Specifically, the control center 5 is set to be an MCU or a single chip microcomputer.

[0050] Optimally, the first DC contactor 31, the second DC contactor 32, the third DC contactor 33, all the fourth DC contactors 34 and all the fifth DC contactors 35 are all set as normally open DC contactors. The coil of the first DC contactor 31, the coil of the second DC contactor 32, the coil of the third DC contactor 33, all the coils of the fourth DC contactors 34 and all the coils of the fifth DC contactors 35 are electrically connected to the control center 5. One end of the normally open contact of the first DC contactor 31 is set as an energized end of the first DC contactor 31, and the other end of the normally open contact of the first DC contactor 31 is set as the other energized end of the first DC contactor 31. One end of the normally open contact of the second DC contactor 32 is set as an energized end of the second DC contactor 32, and the other end of the normally open contact of the second DC contactor 32 is set as the other energized end of the second DC contactor 32. One end of the normally open contact of the third DC contactor 33 is set as one energized end of the third DC contactor 33, and the other end of the normally open contact of the third DC contactor 33 is set as the other energized end of the third DC contactor 33. One end of the normally open contact of each fourth DC contactor 34 is set as one energized end thereof, and the other end of the normally open contact of each fourth DC contactor 34 is set as the other energized end thereof. One end of the normally open contact of each fifth DC contactor 35 is set as one energized end thereof, and the other end of the normally open contact of each fifth DC contactor 35 is set as the other energized end thereof.

[0051] For further information, see Figure 1 and Figure 2 As a specific implementation of a DC dual-gun charging pile output power distribution circuit provided by the present invention, the DC dual-gun charging pile output power distribution circuit also includes a first fuse 61, one end of the first fuse 61 is electrically connected to the output end of the first rectifier module 1, and the other end of the first fuse 61 is electrically connected to an energized end of the first DC contactor 31, an energized end of the third DC contactor 33 and an energized end of all fourth DC contactors 34.

[0052] When the current flowing through the first fuse 61 exceeds the specified value for a period of time, the heat generated by the first fuse 61 itself causes the fuse 61 to melt, thereby disconnecting the first rectifier module 1 from the first charging gun 101, preventing the abnormal current output by the first rectifier module 1 from affecting the new energy vehicle connected to the first charging gun 101.

[0053] For further information, see Figure 1 and Figure 2As a specific implementation of a DC dual-gun charging pile output power distribution circuit provided by the present invention, the DC dual-gun charging pile output power distribution circuit also includes a second fuse 62, one end of the second fuse 62 is electrically connected to the output end of the second rectifier module 2, and the other end of the second fuse 62 is electrically connected to one energized end of the second DC contactor 32, the other energized end of the third DC contactor 33 and one energized end of all fifth DC contactors 35.

[0054] When the current flowing through the second fuse 62 exceeds the specified value for a period of time, the heat generated by the second fuse 62 itself causes the melt of the second fuse 62 to disconnect the second rectifier module 2 from the second charging gun 102, thereby preventing the abnormal current output by the second rectifier module 2 from affecting the new energy vehicle connected to the second charging gun 102.

[0055] For further information, see Figure 1 and Figure 2 As a specific implementation of a DC dual-gun charging pile output power distribution circuit provided by the present invention, the DC dual-gun charging pile output power distribution circuit also includes a plurality of third fuses 63, all third fuses 63 correspond one-to-one to each third rectifier module 4, one end of each third fuse 63 is electrically connected to the output end of the corresponding third rectifier module 4, and the other end of each third fuse 63 is electrically connected to the other energized end of the corresponding fourth DC contactor 34 and the other energized end of the corresponding fifth DC contactor 35.

[0056] When the current flowing through at least one of the third fuses 63 exceeds the specified value for a period of time, the heat generated by the third fuse 63 itself causes its melt to melt, thereby disconnecting the third rectifier module 4 with a current exceeding the specified value from the first charging gun 101, and disconnecting the third rectifier module 4 with a current exceeding the specified value from the third charging gun, thereby preventing the abnormal current output by the third rectifier module 4 with a current exceeding the specified value from affecting the new energy vehicle connected to the first charging gun 101 and the new energy vehicle connected to the second charging gun 102.

[0057] For further information, see Figure 1 and Figure 2 As a specific implementation of a DC dual-gun charging pile output power distribution circuit provided by the present invention, the DC dual-gun charging pile output power distribution circuit also includes a first shunt 71, one shunt end of the first shunt 71 is electrically connected to an energized end of the first DC contactor 31, and the other shunt end of the first shunt 71 is electrically connected to the other energized end of the first DC contactor 31.

[0058] The first shunt 71 facilitates detection of the current flowing through the first DC contactor 31, so that the control center 5 can control the first DC contactor 31, the second DC contactor 32, the third DC contactor 33, each fourth DC contactor 34 and each fifth DC contactor 35 according to the power demand of the new energy vehicle connected to the first charging gun 101, the power demand of the new energy vehicle connected to the second charging gun 102 and the current flowing through the first DC contactor 31.

[0059] Specifically, the control center 5 is communicatively connected to the first diverter 71 .

[0060] For further information, see Figure 1 and Figure 2 As a specific implementation of a DC dual-gun charging pile output power distribution circuit provided by the present invention, the DC dual-gun charging pile output power distribution circuit also includes a first ammeter 81, and the input end of the first ammeter 81 is electrically connected to the output end of the first shunt 71.

[0061] The first shunt 71 and the first ammeter 81 cooperate with each other to detect the current flowing through the first DC contactor 31, so that the control center 5 can control the first DC contactor 31, the second DC contactor 32, the third DC contactor 33, each fourth DC contactor 34 and each fifth DC contactor 35 according to the power demand of the new energy vehicle connected to the first charging gun 101, the power demand of the new energy vehicle connected to the second charging gun 102 and the current flowing through the first DC contactor 31. The control center 5 does not need to calculate the current flowing through the first DC contactor 31 according to the output current of the first shunt 71, thereby reducing the calculation burden of the control center 5.

[0062] Specifically, the first ammeter 81 is communicatively connected to the control center 5 .

[0063] For further information, see Figure 1 and Figure 2 As a specific implementation of a DC dual-gun charging pile output power distribution circuit provided by the present invention, the DC dual-gun charging pile output power distribution circuit also includes a second shunt 72, one shunt end of the second shunt 72 is electrically connected to an energized end of the second DC contactor 32, and the other shunt end of the second shunt 72 is electrically connected to the other energized end of the second DC contactor 32.

[0064] The second shunt 72 facilitates detection of the current flowing through the second DC contactor 32, so that the control center 5 can control the first DC contactor 31, the second DC contactor 32, the third DC contactor 33, each fourth DC contactor 34 and each fifth DC contactor 35 according to the power demand of the new energy vehicle connected to the first charging gun 101, the power demand of the new energy vehicle connected to the second charging gun 102 and the current flowing through the second DC contactor 32.

[0065] Specifically, the control center 5 is communicatively connected to the second diverter 72 .

[0066] For further information, see Figure 1 and Figure 2 As a specific implementation of a DC dual-gun charging pile output power distribution circuit provided by the present invention, the DC dual-gun charging pile output power distribution circuit also includes a second ammeter 82, and the input end of the second ammeter 82 is electrically connected to the output end of the second shunt 72.

[0067] The second shunt 72 and the second ammeter 82 cooperate with each other to detect the current flowing through the second DC contactor 32, so that the control center 5 can control the first DC contactor 31, the second DC contactor 32, the third DC contactor 33, each fourth DC contactor 34 and each fifth DC contactor 35 according to the power demand of the new energy vehicle connected to the first charging gun 101, the power demand of the new energy vehicle connected to the second charging gun 102 and the current flowing through the second DC contactor 32. The control center 5 does not need to calculate the current flowing through the second DC contactor 32 according to the output current of the second shunt 72, thereby reducing the calculation burden of the control center 5.

[0068] Specifically, the second ammeter 82 is communicatively connected to the control center 5 .

[0069] Optimally, the control center 5 controls the first DC contactor 31, the second DC contactor 32, the third DC contactor 33, each fourth DC contactor 34 and each fifth DC contactor 35 according to the power demand of the new energy vehicle connected to the first charging gun 101, the power demand of the new energy vehicle connected to the second charging gun 102, the current flowing through the first DC contactor 31 and the current flowing through the second DC contactor 32.

[0070] For further information, see Figure 1 and Figure 2As a specific implementation of a DC dual-gun charging pile output power distribution circuit provided by the present invention, the DC dual-gun charging pile output power distribution circuit also includes an AC contactor 9, which is controlled by the control center 5 to be closed or opened, and one end of the AC contactor 9 is electrically connected to the input end of the first rectifier module 1, the input end of the second rectifier module 2 and the input end of each third rectifier module 4.

[0071] The AC contactor 9 is used to realize that the AC power supply 104 simultaneously disconnects or connects the input end of the first rectifier module 1, the input end of the second rectifier module 2, and the input ends of all the third rectifier modules 4, thereby ensuring the safety of the AC power supply 104 being disconnected or connected with the input end of the first rectifier module 1, the input end of the second rectifier module 2, and the input ends of all the third rectifier modules 4.

[0072] Specifically, two of each of the third rectifier module 4 , the third fuse 63 , the fourth DC contactor 34 and the fifth DC contactor 35 are provided.

[0073] See also Figure 2 The present invention also provides a dual-gun charging pile, a dual-gun charging pile including the above-mentioned DC dual-gun charging pile output power distribution circuit, including the above-mentioned DC dual-gun charging pile output power distribution circuit.

[0074] The dual-gun charging pile provided by the present invention adopts a DC dual-gun charging pile output power distribution circuit. When a user first uses the first charging gun 101 to charge and then uses the second charging gun 102 to charge at the same time, the charging power of the first charging gun 101 will not be significantly reduced.

[0075] For further information, see Figure 2 As a specific embodiment of a dual-gun charging pile provided by the present invention, the dual-gun charging pile also includes a circuit breaker 103, one end of the circuit breaker 103 is connected to the other end of the AC contactor 9, and the other end of the circuit breaker 103 is electrically connected to the AC power supply 104. When the DC dual-gun charging pile output power distribution circuit has a serious overload, circuit breakage or undervoltage fault, the circuit breaker 103 can automatically cut off the circuit. Through the cooperation of the circuit breaker 103 and the AC contactor 9, the safety of disconnecting and connecting the AC power supply 104 and the input end of the first rectifier module 1, the input end of the second rectifier module 2, and the input end of all the third rectifier modules 4 is further improved.

[0076] Specifically, the circuit breaker 103 is configured as a molded case circuit breaker 103 , which has good heat dissipation performance, is rust-proof and corrosion-proof, and has a long service life.

[0077] Specifically, the AC power source 104 is configured as a three-phase AC power source 104 .

[0078] Optimally, the communication connection between the control center 5 and one end of the circuit breaker 103 facilitates the collection and analysis of the current at one end of the circuit breaker 103 .

[0079] For further information, see Figure 2 As a specific implementation of a dual-gun charging pile provided by the present invention, a display screen 107 of the dual-gun charging pile, an access control device 105 of the dual-gun charging pile, and a lighting system 106 of the dual-gun charging pile are electrically connected to a control center 5 .

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A DC dual-gun charging pile output power distribution circuit, comprising a first power supply branch and a second power supply branch, wherein the output end of the first power supply branch is used to electrically connect to a first charging gun, and the output end of the second power supply branch is used to electrically connect to a second charging gun, characterized in that: The DC dual-gun charging pile output power distribution circuit also includes a third power supply branch, a gating module and a control center, the output end of the third power supply branch is electrically connected to the input end of the gating module, the first gating output end of the gating module is electrically connected to the output end of the first power supply branch, and the second gating output end of the gating module is electrically connected to the output end of the second power supply branch. The control center is used to control the gating module to be in a first state, a second state or a third state. When the gating module is in the first state, the input end of the gating module is only connected to the first gating output end of the gating module. When the gating module is in the second state, the input end of the gating module is only connected to the second gating output end of the gating module. The input end of the gating module is simultaneously connected to the first gating output end of the gating module and the second gating output end of the gating module. The first power supply branch includes a first rectifier module and a first DC contactor, the second power supply branch includes a second rectifier module and a second DC contactor, and the third power supply branch includes a third rectifier module, a fourth DC contactor and a fifth DC contactor; The output end of the first rectifier module is connected to one energized end of the first DC contactor, and the other energized end of the first DC contactor is electrically connected to the first charging gun; The output end of the second rectifier module is connected to one energized end of the second DC contactor, and the other energized end of the second DC contactor is electrically connected to the second charging gun; The first DC contactor, the second DC contactor, the fourth DC contactor and the fifth DC contactor are controlled by the control center to be closed or opened; One energized end of the fourth DC contactor is electrically connected to the output end of the first rectifier module, and the other energized end of the fourth DC contactor is electrically connected to the output end of the third rectifier module; One energized end of the fifth DC contactor is electrically connected to the output end of the second rectifier module, and the other energized end of the fifth DC contactor is electrically connected to the output end of the third rectifier module.

2. A DC dual-gun charging pile output power distribution circuit as claimed in claim 1, characterized in that: The DC dual-gun charging pile output power distribution circuit also includes a third DC contactor, one energized end of the third DC contactor is electrically connected to the output end of the first rectifier module, and the other energized end of the third DC contactor is electrically connected to the output end of the second rectifier module.

3. A DC dual-gun charging pile output power distribution circuit as claimed in claim 1, characterized in that: The DC dual-gun charging pile output power distribution circuit also includes a first shunt, one shunt end of the first shunt is electrically connected to one energized end of the first DC contactor, and the other shunt end of the first shunt is electrically connected to the other energized end of the first DC contactor.

4. A DC dual-gun charging pile output power distribution circuit as described in claim 3, characterized in that: The DC dual-gun charging pile output power distribution circuit also includes a first ammeter, and the input end of the first ammeter is electrically connected to the output end of the first shunt.

5. A DC dual-gun charging pile output power distribution circuit as claimed in claim 1, characterized in that: The DC dual-gun charging pile output power distribution circuit also includes a second shunt, one shunt end of the second shunt is electrically connected to one energized end of the second DC contactor, and the other shunt end of the second shunt is electrically connected to the other energized end of the second DC contactor.

6. A DC dual-gun charging pile output power distribution circuit as claimed in claim 5, characterized in that: The DC dual-gun charging pile output power distribution circuit also includes a second ammeter, and the input end of the second ammeter is electrically connected to the output end of the second shunt.

7. A DC dual-gun charging pile output power distribution circuit as claimed in claim 1, characterized in that: The DC dual-gun charging pile output power distribution circuit also includes a third fuse, one end of the third fuse is electrically connected to the output end of the third power supply branch, and the other end of the third fuse is electrically connected to the input end of the selection module.

8. A DC dual-gun charging pile output power distribution circuit as claimed in claim 1, characterized in that: The DC dual-gun charging pile output power distribution circuit also includes an AC contactor, which is controlled by the control center to be closed or opened, and one end of the AC contactor is electrically connected to the input end of the first rectifier module, the input end of the second rectifier module and the input end of each of the third rectifier modules.

9. A dual-gun charging pile, characterized in that: A DC dual-gun charging pile output power distribution circuit comprising any one of claims 1-8.

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