Power distributor for dual-gun DC charging piles

Abstract

The present application discloses a power distributor applied to a dual-gun DC charging pile, which is applied to the field of charging technology and is used to solve the technical problem of resource waste in the existing dual-gun DC charging pile. The present application provides a power distributor applied to a dual-gun DC charging pile, including a charging module, a positive bus and a negative bus, a charging controller, a positive high-voltage DC contactor and a negative high-voltage DC contactor inside the charging pile, a positive high-voltage DC contactor is provided on the positive bus, and a negative high-voltage DC contactor is provided on the negative bus. The positive high-voltage DC contactor is connected to the positive pole of the charging module and the output end of the positive bus, respectively, and the output end of the positive bus forms the positive input end of the external first charging gun and the positive input end of the external second charging gun, respectively, and the negative high-voltage DC contactor is connected to the negative pole of the charging module and the output end of the negative bus, respectively, and the charging controller is connected to the positive high-voltage DC contactor and the negative high-voltage DC contactor.

Description

Technical Field

[0001] The present application relates to the field of charging technology, and in particular to a power distributor applied to a dual-gun DC charging pile. Background Art

[0002] At present, the traditional integrated power distributor used in dual-gun DC charging piles on the market has two guns whose power output is either evenly distributed, that is, each gun outputs half of the power, or one gun outputs full power and the other gun does not output power, that is, each gun has only two gears of half power and full power output. In this case, when the vehicle BMS (Battery Management System) has a large demand, such as 80KW, and the charging pile can only output 60KW or 120KW, when the charging pile outputs 60KW, the charging power is insufficient and it takes a long time to fully charge. When the charging pile outputs 120KW, in order to match the needs of the vehicle BMS battery management system, it can only reduce the power output to 80KW. At this time, the output of the other gun has been switched in the physical connection and can no longer output power, resulting in a waste of 40KW of resources.

[0003] In summary, the power distribution of the existing integrated dual-gun DC charging pile has too few output gears, which makes it difficult to meet the charging requirements of the vehicle's BMS battery management system. It also leads to waste of DC charging pile resources and too long charging time. Summary of the invention

[0004] The embodiment of the present application provides a power distributor applied to a dual-gun DC charging pile to solve the technical problem of resource waste in the existing dual-gun DC charging pile.

[0005] The present invention provides a power distributor applied to a dual-gun DC charging pile, comprising a plurality of charging modules, a positive busbar and a negative busbar inside the charging pile, and also comprising a charging controller, a plurality of positive high-voltage DC contactors and a plurality of negative high-voltage DC contactors, wherein the positive busbar is provided with the positive high-voltage DC contactor, and the negative busbar is provided with the negative high-voltage DC contactor, the positive high-voltage DC contactor is respectively connected to the positive pole of the charging module and the output end of the positive busbar, the output end of the positive busbar respectively forms the positive pole input end of an external first charging gun and the positive pole input end of an external second charging gun, the negative high-voltage DC contactor is respectively connected to the negative pole of the charging module and the output end of the negative busbar, the output end of the negative busbar respectively forms the negative pole output end of the first charging gun and the negative pole output end of the second charging gun, and the charging controller is connected to each of the positive high-voltage DC contactors and each of the negative high-voltage DC contactors;

[0006] The charging controller is used to control the on and off of the positive high-voltage DC contactor and the negative high-voltage DC contactor according to the target output power of the first charging gun and the second charging gun, so that the output end of the first charging gun and the output end of the second charging gun can output different charging powers.

[0007] Furthermore, it also includes a fuse, the input end of the fuse is connected to the positive pole of the charging module, and the output end of the fuse is connected to the positive high-voltage DC contactor.

[0008] Furthermore, the positive busbar includes a plurality of positive branches, each of which is connected to the positive pole of at least one of the charging modules, the number of the fuses is the same as the number of the positive branches, and each of the fuses is respectively connected to the positive pole of the charging module on the corresponding positive branch and the positive high-voltage DC contactor.

[0009] Further, the negative busbar includes a plurality of negative branches, the number of the negative branches is the same as that of the positive branches and they are symmetrically distributed, the number of the positive high-voltage DC contactors is the same as that of the negative high-voltage DC contactors, and the positive high-voltage DC contactors on the positive busbar and the negative high-voltage DC contactors on the negative busbar are symmetrically distributed;

[0010] The charging controller is used to control the positive high-voltage DC contactor and the negative high-voltage DC contactor in symmetrical positions to be turned on and off simultaneously.

[0011] Furthermore, the positive busbar includes four positive branches, namely, the first positive branch of the first charging gun, the second positive branch of the first charging gun, the first positive branch of the second charging gun and the second positive branch of the second charging gun. The number of fuses is four, namely, the first fuse, the second fuse, the third fuse and the fourth fuse. The first fuse is respectively connected to the positive pole of the charging module on the first positive branch of the first charging gun, the positive high-voltage DC contactor and the positive input end of the external first charging gun. The second fuse is respectively connected to the positive pole of the charging module on the second positive branch of the first charging gun and the positive high-voltage DC contactor. The third fuse is respectively connected to the positive pole of the charging module on the first positive branch of the second charging gun, the positive high-voltage DC contactor and the positive input end of the external second charging gun. The fourth fuse is respectively connected to the positive pole of the charging module on the second positive branch of the second charging gun and the positive high-voltage DC contactor.

[0012] Furthermore, the number of the positive high-voltage DC contactors is five, namely, a first positive high-voltage DC contactor, a second positive high-voltage DC contactor, a third positive high-voltage DC contactor, a fourth positive high-voltage DC contactor and a fifth positive high-voltage DC contactor, the first positive high-voltage DC contactor is respectively connected to the first fuse, the second fuse, the second positive high-voltage DC contactor and the positive input end of the external first charging gun, the second positive high-voltage DC contactor is respectively connected to the second fuse, the third fuse, the third positive high-voltage DC contactor The device is connected to the positive input terminal of the external second charging gun, the third positive high-voltage DC contactor is respectively connected to the third fuse, the fourth fuse, the fourth positive high-voltage DC contactor and the positive input terminal of the external second charging gun, the fourth positive high-voltage DC contactor is respectively connected to the fourth fuse and the positive input terminal of the external first charging gun, and the fifth positive high-voltage DC contactor is respectively connected to the first fuse, the first positive high-voltage DC contactor, the positive input terminal of the external first charging gun and the positive input terminal of the external second charging gun.

[0013] Furthermore, the negative busbar includes four negative branches, namely, the first negative branch of the first charging gun, the second negative branch of the first charging gun, the first negative branch of the second charging gun, and the second negative branch of the second charging gun. The number of the negative high-voltage DC contactors is five, namely, the first negative high-voltage DC contactor, the second negative high-voltage DC contactor, the third negative high-voltage DC contactor, the fourth negative high-voltage DC contactor and the fifth negative high-voltage DC contactor. The first negative high-voltage DC contactor is respectively connected to the negative pole of the charging module on the first negative branch of the first charging gun, the negative pole of the charging module on the second negative branch of the first charging gun, the second negative high-voltage DC contactor and the negative output end of the first charging gun, and the second negative high-voltage DC contactor is respectively connected to the charging module on the second negative branch of the first charging gun. The negative pole of the block, the negative pole of the charging module on the first negative pole branch of the second charging gun, the third negative pole high-voltage DC contactor and the negative pole output end of the second charging gun are connected, the third negative pole high-voltage DC contactor is respectively connected with the negative pole of the charging module on the first negative pole branch of the second charging gun, the negative pole of the charging module on the second negative pole branch of the second charging gun, the fourth negative pole high-voltage DC contactor and the negative pole output end of the second charging gun, the fourth negative pole high-voltage DC contactor is respectively connected with the negative pole of the charging module on the second negative pole branch of the second charging gun and the negative pole output end of the first charging gun, the fifth negative pole high-voltage DC contactor is respectively connected with the negative pole of the charging module on the first negative pole branch of the first charging gun, the first negative pole high-voltage DC contactor, the negative pole output end of the first charging gun and the negative pole output end of the second charging gun.

[0014] Further, the number of the charging modules includes six, namely the first charging module, the second charging module, the third charging module, the fourth charging module, the fifth charging module and the sixth charging module. The first charging module is connected in series with the second charging module, the positive electrode of the first charging module and the positive electrode of the second charging module are respectively connected to the first positive branch of the first charging gun, the negative electrode of the first charging module and the negative electrode of the second charging module are respectively connected to the first negative branch of the first charging gun, the positive electrode of the third charging module is connected to the second positive branch of the first charging gun, and the negative electrode of the third charging module is connected to the second negative branch of the first charging gun. The fourth charging module is connected in series with the fifth charging module, the positive electrode of the fourth charging module and the positive electrode of the fifth charging module are respectively connected to the first positive branch of the second charging gun, the negative electrode of the fourth charging module and the negative electrode of the fifth charging module are respectively connected to the first negative branch of the second charging gun, the positive electrode of the sixth charging module is connected to the second positive branch of the second charging gun, and the negative electrode of the sixth charging module is connected to the second negative branch of the second charging gun.

[0015] Furthermore, it also includes a first shunt, a first DC meter, a second shunt and a second DC meter, the first shunt is connected to the first DC meter, the first shunt is respectively connected to the negative pole of the charging module, the negative high-voltage DC contactor and the negative output end of the first charging gun, the second shunt is connected to the second DC meter, the second shunt is respectively connected to the negative pole of the charging module, the negative high-voltage DC contactor and the negative output end of the second charging gun.

[0016] Furthermore, it also includes a first high-voltage DC contactor and a second high-voltage DC contactor, the first high-voltage DC contactor is respectively connected to the positive pole of the charging module, the positive high-voltage DC contactor and the positive input terminal of the external first charging gun, and the second high-voltage DC contactor is respectively connected to the positive pole of the charging module, the positive high-voltage DC contactor and the positive input terminal of the external second charging gun.

[0017] The power distributor applied to the dual-gun DC charging pile proposed by the present invention, by respectively arranging a positive high-voltage DC contactor and a negative high-voltage DC contactor on the positive busbar and the negative busbar, connecting a charging controller to each of the positive high-voltage DC contactors and each of the negative high-voltage DC contactors, and controlling the on-off of each of the positive high-voltage DC contactors and the negative high-voltage DC contactors by the charging controller, since the positive high-voltage DC contactor and the negative high-voltage DC contactor are arranged between the charging module and the output end of the busbar and connected to the charging module, when the charging module and the output end of the busbar are not disconnected by the positive high-voltage DC contactor and the negative high-voltage DC contactor, the charging module outputs charging power, and when the charging module and the output end of the busbar are disconnected by the positive high-voltage DC contactor and the negative high-voltage DC contactor, the corresponding charging module does not output electric energy, so that the power distributor applied to the dual-gun DC charging pile can realize power distribution, and there is no problem of resource waste due to no electric energy input on the charging gun that does not output charging power, thereby improving resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 This is a circuit structure block diagram of a power distributor applied to a dual-gun DC charging pile in one embodiment of the present application;

[0020] Figure 2 It is a circuit structure block diagram of a power distributor applied to a dual-gun DC charging pile in another embodiment of the present application;

[0021] Figure 3 It is a schematic diagram of the circuit structure on the positive busbar of the power distributor applied to the double-gun DC charging pile in one embodiment of the present application;

[0022] Figure 4 It is a schematic diagram of the circuit structure on the negative busbar of the power distributor applied to a dual-gun DC charging pile in one embodiment of the present application.

[0023] Among them, the parts represented by the reference numerals in the accompanying drawings are as follows:

[0024] M1, first charging module; M2, second charging module; M3, third charging module; M4, fourth charging module; M5, fifth charging module; M6, sixth charging module; K11, first positive high-voltage DC contactor; K12, second positive high-voltage DC contactor; K13, third positive high-voltage DC contactor; K14, fourth positive high-voltage DC contactor; K15, fifth positive high-voltage DC contactor; K21, first negative high-voltage DC contactor; K22, second negative high-voltage DC contactor; K23, third negative high-voltage DC contactor; K24, fourth negative Extremely high-voltage DC contactor; K25, the fifth negative high-voltage DC contactor; F1, the first fuse; F2, the second fuse; F3, the third fuse; F4, the fourth fuse; K1, the first high-voltage DC contactor; K2, the second high-voltage DC contactor; D1, the first shunt; D2, the second shunt; PJ1, the first DC meter; PJ2, the second DC meter; A+, the positive input terminal of the external first charging gun; A-, the negative input terminal of the external first charging gun; B+, the positive input terminal of the external second charging gun; B-, the negative input terminal of the external second charging gun. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application 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 application and are not used to limit the present application.

[0026] The implementation of this application is described in detail below with reference to the specific drawings:

[0027] Figure 1 This is a circuit structure block diagram of a power distributor applied to a dual-gun DC charging pile in an embodiment of the present application. Figure 1 A power distributor for a dual-gun DC charging pile according to an embodiment of the present invention is described in detail. Figure 1 As shown, the power distributor applied to the dual-gun DC charging pile includes several charging modules, a positive bus bar and a negative bus bar inside the charging pile. Figure 1In, "charging module +" represents the positive electrode of the charging module, and "charging module -" represents the negative electrode of the corresponding charging module. The power distributor applied to the dual-gun DC charging pile also includes a charging controller, a plurality of positive high-voltage DC contactors and a plurality of negative high-voltage DC contactors. The positive bus is provided with the positive high-voltage DC contactor, and the negative bus is provided with the negative high-voltage DC contactor. The positive high-voltage DC contactor is respectively connected to the positive electrode of the charging module and the output end of the positive bus, and the output end of the positive bus forms the positive input end of the external first charging gun and the positive input end of the external second charging gun, respectively. The negative high-voltage DC contactor is respectively connected to the negative electrode of the charging module and the output end of the negative bus, and the output end of the negative bus forms the negative output end of the first charging gun and the negative output end of the second charging gun, respectively. The charging controller is connected to each of the positive high-voltage DC contactors and each of the negative high-voltage DC contactors;

[0028] The charging controller is used to control the on and off of the positive high-voltage DC contactor and the negative high-voltage DC contactor according to the target output power of the first charging gun and the second charging gun, so that the output end of the first charging gun and the output end of the second charging gun can output different charging powers. The charging controller is used to control the output power gear of the first charging gun and the output power gear of the second charging gun.

[0029] As an option, the positive busbar and the negative busbar use copper bars as carriers, and the positive high-voltage DC contactor and the negative high-voltage DC contactor can use high-voltage DC contactors with product specifications of EVC100A-124D. Figure 1 Among K11~K1n, the negative high voltage DC contactor is as follows Figure 1 Among K21~K2n, the positive high-voltage DC contactor and the negative high-voltage DC contactor are used to combine and switch the output power of the charging module, thereby switching out output power of different gears.

[0030] The power distributor applied to the dual-gun DC charging pile proposed in this embodiment, by respectively arranging a positive high-voltage DC contactor and a negative high-voltage DC contactor on the positive busbar and the negative busbar, connecting a charging controller to each of the positive high-voltage DC contactors and each of the negative high-voltage DC contactors, and controlling the on and off of each of the positive high-voltage DC contactors and the negative high-voltage DC contactors through the charging controller, since the positive high-voltage DC contactor and the negative high-voltage DC contactor are arranged between the charging module and the output end of the busbar and connected to the charging module, when the charging module and the output end of the busbar are not disconnected by the positive high-voltage DC contactor and the negative high-voltage DC contactor, the charging module outputs charging power, and when the charging module and the output end of the busbar are disconnected by the positive high-voltage DC contactor and the negative high-voltage DC contactor, the corresponding charging module does not output electric energy, so that the power distributor applied to the dual-gun DC charging pile can realize power distribution, and there will be no problem of resource waste due to no electric energy input on the charging gun that does not output charging power, thereby improving resource utilization.

[0031] Figure 2 : is a circuit structure block diagram of a power distributor applied to a dual-gun DC charging pile in another embodiment of the present application, such as Figure 2 As shown, the power distributor applied to the dual-gun DC charging pile also includes a fuse, the input end of the fuse is connected to the positive pole of the charging module, and the output end of the fuse is connected to the positive high-voltage DC contactor.

[0032] The fuse may be a fuse with a product specification of RS309-MF-150A. In this embodiment, a fuse is added between the positive electrode of the charging module and the external charging gun so that when a large instantaneous current passes through, the fuse is quickly blown, the DC output is cut off, and the safety of the vehicle connected at the rear end is protected.

[0033] like Figure 2 As shown, the positive busbar includes a plurality of positive branches, each of which is connected to the positive pole of at least one of the charging modules, the number of the fuses is the same as the number of the positive branches, and each of the fuses is respectively connected to the positive pole of the charging module on the corresponding positive branch and the positive high-voltage DC contactor.

[0034] In this embodiment, a fuse is provided between the positive electrode of the charging module of each branch on the positive busbar and the external charging gun. On the one hand, when a large instantaneous current passes through a branch, the fuse can be quickly blown to protect the safety of the external charging gun and the rear-end vehicle. On the other hand, it does not affect the power output of the charging modules on other branches to the external charging gun, thereby improving the safety and practicality of the power distributor used in the dual-gun DC charging pile.

[0035] Correspondingly, the negative busbar includes a plurality of negative branches, the number of the negative branches is the same as that of the positive branches and they are symmetrically distributed, the number of the positive high-voltage DC contactors is the same as that of the negative high-voltage DC contactors, and the positive high-voltage DC contactors on the positive busbar and the negative high-voltage DC contactors on the negative busbar are symmetrically distributed;

[0036] The charging controller is used to control the positive high-voltage DC contactor and the negative high-voltage DC contactor in symmetrical positions to be turned on and off simultaneously.

[0037] As an option, the positive busbar includes four positive branches, namely, the first positive branch of the first charging gun, the second positive branch of the first charging gun, the first positive branch of the second charging gun and the second positive branch of the second charging gun. The number of fuses is four, namely, the first fuse F1, the second fuse F2, the third fuse F3 and the fourth fuse F4. The first fuse F1 is respectively connected to the positive pole of the charging module on the first positive branch of the first charging gun, the positive high-voltage DC contactor and the positive input end of the external first charging gun. The second fuse F2 is respectively connected to the positive pole of the charging module on the second positive branch of the first charging gun and the positive high-voltage DC contactor. The third fuse F3 is respectively connected to the positive pole of the charging module on the first positive branch of the second charging gun, the positive high-voltage DC contactor and the positive input end of the external second charging gun. The fourth fuse F4 is respectively connected to the positive pole of the charging module on the second positive branch of the second charging gun and the positive high-voltage DC contactor.

[0038] As an alternative, Figure 2 As shown, the power distributor applied to the dual-gun DC charging pile also includes a first shunt D1, a first DC meter PJ1, a second shunt D2 and a second DC meter PJ2. The first shunt D1 is connected to the first DC meter PJ1, and the first shunt D1 is respectively connected to the negative pole of the charging module, the negative high-voltage DC contactor and the negative output end of the first charging gun, and the second shunt D2 is connected to the second DC meter PJ2, and the second shunt D2 is respectively connected to the negative pole of the charging module, the negative high-voltage DC contactor and the negative output end of the second charging gun.

[0039] The product specifications of the first shunt D1 and the second shunt D2 can be selected from FL-275MV 300A shunts.

[0040] Among them, a first shunt D1 and a first DC meter PJ1 are set at the negative output end of the first charging gun of the power distributor applied to the dual-gun DC charging pile, which can measure the power output of the first charging gun, and a second shunt D2 and a second DC meter PJ2 are set at the negative output end of the second charging gun, which can measure the power output of the second charging gun.

[0041] Furthermore, the power distributor applied to the dual-gun DC charging pile also includes a first high-voltage DC contactor K1 and a second high-voltage DC contactor K2. The first high-voltage DC contactor K1 is respectively connected to the positive pole of the charging module, the positive high-voltage DC contactor and the positive input terminal of the external first charging gun, and the second high-voltage DC contactor K2 is respectively connected to the positive pole of the charging module, the positive high-voltage DC contactor and the positive input terminal of the external second charging gun.

[0042] As an option, the first high-voltage DC contactor K1 and the second high-voltage DC contactor K2 can be selected from high-voltage DC contactors with product specifications of EVC250A-1AD. Figure 3 and Figure 4 As shown, the positive high-voltage DC contactor, the negative high-voltage DC contactor, the first high-voltage DC contactor K1 and the second high-voltage DC contactor K2 are all provided with control signal lines and feedback signal lines, and the control signal lines and feedback signal lines are connected to the charging controller of the DC pile.

[0043] In one embodiment, the first high-voltage DC contactor K1 and the second high-voltage DC contactor K2 are respectively connected to the charging controller. The first high-voltage DC contactor K1 is used to control the on-off of the output power of the first charging gun, and the second high-voltage DC contactor K2 is used to control the on-off of the output power of the second charging gun.

[0044] Figure 3 : is a schematic diagram of the circuit structure on the positive busbar of the power distributor applied to the dual-gun DC charging pile in one embodiment of the present application, such as Figure 3As shown, there are five positive high-voltage DC contactors, namely, a first positive high-voltage DC contactor K11, a second positive high-voltage DC contactor K12, a third positive high-voltage DC contactor K13, a fourth positive high-voltage DC contactor K14 and a fifth positive high-voltage DC contactor K15. The first positive high-voltage DC contactor K11 is connected to the first fuse F1, the second fuse F2, the second positive high-voltage DC contactor K12 and the positive input end of the external first charging gun, respectively. The second positive high-voltage DC contactor K12 is connected to the second fuse F2, the third fuse F3, the third positive high-voltage DC contactor K14 and the fifth positive high-voltage DC contactor K15. The contactor K13 is connected to the positive input terminal of the external second charging gun, the third positive high-voltage DC contactor K13 is respectively connected to the third fuse F3, the fourth fuse F4, the fourth positive high-voltage DC contactor K14 and the positive input terminal of the external second charging gun, the fourth positive high-voltage DC contactor K14 is respectively connected to the fourth fuse F4 and the positive input terminal of the external first charging gun, and the fifth positive high-voltage DC contactor K15 is respectively connected to the first fuse F1, the first positive high-voltage DC contactor K11, the positive input terminal of the external first charging gun and the positive input terminal of the external second charging gun.

[0045] in, Figure 3 "A+" represents the positive input terminal of the external first charging gun, and "B+" represents the positive input terminal of the external second charging gun.

[0046] Figure 4 : is a schematic diagram of the circuit structure on the negative busbar of the power distributor applied to the double-gun DC charging pile in one embodiment of the present application, such as Figure 4As shown, the negative busbar includes four negative branches, namely, the first negative branch of the first charging gun, the second negative branch of the first charging gun, the first negative branch of the second charging gun, and the second negative branch of the second charging gun. The number of the negative high-voltage DC contactors is five, namely, the first negative high-voltage DC contactor K21, the second negative high-voltage DC contactor K22, the third negative high-voltage DC contactor K23, the fourth negative high-voltage DC contactor K24 and the fifth negative high-voltage DC contactor K25. The first negative high-voltage DC contactor K21 is respectively connected to the negative electrode of the charging module on the first negative branch of the first charging gun, the negative electrode of the charging module on the second negative branch of the first charging gun, the second negative high-voltage DC contactor K22 and the negative output end of the first charging gun, and the second negative high-voltage DC contactor K22 is respectively connected to the charging module on the second negative branch of the first charging gun. The negative pole of the electric module, the negative pole of the charging module on the first negative pole branch of the second charging gun, the third negative pole high-voltage DC contactor K23 and the negative pole output end of the second charging gun are connected, the third negative pole high-voltage DC contactor K23 is respectively connected to the negative pole of the charging module on the first negative pole branch of the second charging gun, the negative pole of the charging module on the second negative pole branch of the second charging gun, the fourth negative pole high-voltage DC contactor K24 and the negative pole output end of the second charging gun, the fourth negative pole high-voltage DC contactor K24 is respectively connected to the negative pole of the charging module on the second negative pole branch of the second charging gun and the negative pole output end of the first charging gun, the fifth negative pole high-voltage DC contactor K25 is respectively connected to the negative pole of the charging module on the first negative pole branch of the first charging gun, the first negative pole high-voltage DC contactor K21, the negative pole output end of the first charging gun and the negative pole output end of the second charging gun.

[0047] in, Figure 4 “A-” indicates the negative input terminal of the external first charging gun, and “B-” indicates the negative input terminal of the external second charging gun.

[0048] As an alternative, Figure 3 and Figure 4As shown, the number of the charging modules includes six, namely the first charging module M1, the second charging module M2, the third charging module M3, the fourth charging module M4, the fifth charging module M5 and the sixth charging module M6. The first charging module M1 is connected in series with the second charging module M2. The positive electrode of the first charging module M1 and the positive electrode of the second charging module M2 are respectively connected to the first positive branch of the first charging gun, the negative electrode of the first charging module M1 and the negative electrode of the second charging module M2 are respectively connected to the first negative branch of the first charging gun, and the positive electrode of the third charging module M3 is connected to the first charging gun. The second positive branch is connected, the negative electrode of the third charging module M3 is connected to the second negative branch of the first charging gun, the fourth charging module M4 is connected in series with the fifth charging module M5, the positive electrode of the fourth charging module M4 and the positive electrode of the fifth charging module M5 are respectively connected to the first positive branch of the second charging gun, the negative electrode of the fourth charging module M4 and the negative electrode of the fifth charging module M5 are respectively connected to the first negative branch of the second charging gun, the positive electrode of the sixth charging module M6 is connected to the second positive branch of the second charging gun, and the negative electrode of the sixth charging module M6 is connected to the second negative branch of the second charging gun.

[0049] A usage scenario according to this embodiment is described in detail below by taking the example that the power of the charging pile is 120KW and the power of each charging module is 20KW.

[0050] like Figure 3 and Figure 4 As shown, Figure 3 The positive copper plate of the A gun, the auxiliary positive copper plate A, the positive copper plate of the B gun and the auxiliary positive copper plate B respectively constitute the four branches of the positive busbar. Figure 4 The negative copper plate of gun A, the auxiliary negative copper plate A, the negative copper plate of gun B and the auxiliary negative copper plate B respectively constitute the four branches of the positive busbar. Among them, the positive (negative) copper bar of gun A is connected to the first charging module M1 and the second charging module M2 by default, the auxiliary positive (negative) copper bar A is connected to the third charging module M3 by default, the positive (negative) copper bar of gun B is connected to the fourth charging module M4 and the fifth charging module M5 by default, and the auxiliary positive (negative) copper bar B is connected to the sixth charging module M6 by default, that is, when the positive high-voltage DC contactors K11~K15 and the negative high-voltage DC contactors K21~K25 are both disconnected by default and do not act, the output power of the first charging gun A and the second charging gun B are both 40KW.

[0051] Assuming that the full output power of the entire charging pile is 120KW, the positive high-voltage DC contactors K11~K15 and the negative high-voltage DC contactors K21~K25 are switched in combination, and the output power scenarios of different gears are switched are as follows.

[0052] 1. When K11, K21, K14, K24, K15, and K25 remain disconnected by default and do not operate, and K12, K22, K13, and K23 are closed, the output power of the first charging gun A is 40KW, and the output power of the second charging gun B is 80KW;

[0053] 2. When K11, K21, K13, and K23 are closed, K14, K24, K15, K25, K12, and K22 remain disconnected by default and do not operate. At this time, the output power of the first charging gun A is 60KW, and the output power of the second charging gun B is 60KW;

[0054] 3. When K11, K21, K14, and K24 are closed, K15, K25, K12, K22, K13, and K23 are disconnected by default and do not work. At this time, the output power of the first charging gun A is 80KW, and the output power of the second charging gun B is 40KW;

[0055] 4. When K11, K21, K14, K24, K15, and K25 are closed, K12, K22, K13, and K23 are disconnected by default and do not work. At this time, the output power of the first charging gun A is 120KW, and the output power of the second charging gun B is 0.

[0056] Summary: The power distribution modes of the first charging gun A / the second charging gun B are 40KW / 80KW, 60KW / 60KW, 80KW / 40KW, and 120KW / 0. Both the first charging gun A and the second charging gun B can switch between four gears.

[0057] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above.

[0058] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A power distributor for a dual-gun DC charging pile, comprising a plurality of charging modules, a positive bus bar and a negative bus bar inside the charging pile, characterized in that: It also includes a charging controller, a plurality of positive high-voltage DC contactors and a plurality of negative high-voltage DC contactors, the positive busbar is provided with the positive high-voltage DC contactor, the negative busbar is provided with the negative high-voltage DC contactor, the positive high-voltage DC contactor is respectively connected to the positive pole of the charging module and the output end of the positive busbar, the output end of the positive busbar respectively forms the positive input end of the external first charging gun and the positive input end of the external second charging gun, the negative high-voltage DC contactor is respectively connected to the negative pole of the charging module and the output end of the negative busbar, the output end of the negative busbar respectively forms the negative output end of the first charging gun and the negative output end of the second charging gun, and the charging controller is connected to each of the positive high-voltage DC contactors and each of the negative high-voltage DC contactors; The charging controller is used to control the on and off of the positive high-voltage DC contactor and the negative high-voltage DC contactor according to the target output power of the first charging gun and the second charging gun, so that the output end of the first charging gun and the output end of the second charging gun can output different charging powers; It also includes a fuse, the input end of the fuse is connected to the positive pole of the charging module, and the output end of the fuse is connected to the positive high-voltage DC contactor; the positive bus includes a plurality of positive branches, each of which is connected to the positive pole of at least one charging module, the number of the fuses is the same as the number of the positive branches, and each fuse is respectively connected to the positive pole of the charging module and the positive high-voltage DC contactor on the corresponding positive branch; the negative bus includes a plurality of negative branches, the number of the negative branches is the same as the number of the positive branches and is symmetrically distributed, the number of the positive high-voltage DC contactors is the same as the number of the negative high-voltage DC contactors, and the positive high-voltage DC contactors on the positive bus and the negative high-voltage DC contactors on the negative bus are symmetrically distributed; the charging controller is used to control the positive high-voltage DC contactors and the negative high-voltage DC contactors in symmetrical positions to be turned on and off at the same time; The positive busbar includes four positive branches, namely, the first positive branch of the first charging gun, the second positive branch of the first charging gun, the first positive branch of the second charging gun, and the second positive branch of the second charging gun. The number of the fuses is four, namely, the first fuse, the second fuse, the third fuse and the fourth fuse. The first fuse is respectively connected to the positive pole of the charging module on the first positive branch of the first charging gun, the positive high-voltage DC contactor and the positive input end of the external first charging gun. The second fuse is respectively connected to the positive pole of the charging module on the second positive branch of the first charging gun and the positive high-voltage DC contactor. The third fuse is respectively connected to the positive pole of the charging module on the first positive branch of the second charging gun, the positive high-voltage DC contactor and the positive input end of the external second charging gun. The fourth fuse is respectively connected to the positive pole of the charging module on the second positive branch of the second charging gun and the positive high-voltage DC contactor. The negative busbar includes four negative branches, namely the first negative branch of the first charging gun, the second negative branch of the first charging gun, the first negative branch of the second charging gun, and the second negative branch of the second charging gun. The number of the negative high-voltage DC contactors is five, namely the first negative high-voltage DC contactor, the second negative high-voltage DC contactor, the third negative high-voltage DC contactor, the fourth negative high-voltage DC contactor and the fifth negative high-voltage DC contactor. The first negative high-voltage DC contactor is respectively connected to the negative pole of the charging module on the first negative branch of the first charging gun, the negative pole of the charging module on the second negative branch of the first charging gun, the second negative high-voltage DC contactor and the negative output end of the first charging gun. The second negative high-voltage DC contactor is respectively connected to the negative pole of the charging module on the second negative branch of the first charging gun, ... The negative pole of the charging module on the first negative branch of the second charging gun, the third negative high-voltage DC contactor and the negative output end of the second charging gun are connected, the third negative high-voltage DC contactor is respectively connected to the negative pole of the charging module on the first negative branch of the second charging gun, the negative pole of the charging module on the second negative branch of the second charging gun, the fourth negative high-voltage DC contactor and the negative output end of the second charging gun, the fourth negative high-voltage DC contactor is respectively connected to the negative pole of the charging module on the second negative branch of the second charging gun and the negative output end of the first charging gun, the fifth negative high-voltage DC contactor is respectively connected to the negative pole of the charging module on the first negative branch of the first charging gun, the first negative high-voltage DC contactor, the negative output end of the first charging gun and the negative output end of the second charging gun.

2. The power distributor for dual-gun DC charging pile according to claim 1 is characterized in that: The number of the positive high-voltage DC contactors is five, namely the first positive high-voltage DC contactor, the second positive high-voltage DC contactor, the third positive high-voltage DC contactor, the fourth positive high-voltage DC contactor and the fifth positive high-voltage DC contactor. The first positive high-voltage DC contactor is connected to the first fuse, the second fuse, the second positive high-voltage DC contactor and the positive input terminal of the external first charging gun, respectively. The second positive high-voltage DC contactor is connected to the second fuse, the third fuse, the third positive high-voltage DC contactor and the positive input terminal of the external first charging gun, respectively. The positive input terminal of the external second charging gun is connected, the third positive high-voltage DC contactor is respectively connected to the third fuse, the fourth fuse, the fourth positive high-voltage DC contactor and the positive input terminal of the external second charging gun, the fourth positive high-voltage DC contactor is respectively connected to the fourth fuse and the positive input terminal of the external first charging gun, and the fifth positive high-voltage DC contactor is respectively connected to the first fuse, the first positive high-voltage DC contactor, the positive input terminal of the external first charging gun and the positive input terminal of the external second charging gun.

3. The power distributor for double-gun DC charging pile according to claim 2 is characterized in that: The number of the charging modules includes six, namely the first charging module, the second charging module, the third charging module, the fourth charging module, the fifth charging module and the sixth charging module. The first charging module is connected in series with the second charging module. The positive electrode of the first charging module and the positive electrode of the second charging module are respectively connected to the first positive branch of the first charging gun, the negative electrode of the first charging module and the negative electrode of the second charging module are respectively connected to the first negative branch of the first charging gun, the positive electrode of the third charging module is connected to the second positive branch of the first charging gun, and the negative electrode of the third charging module is connected to the second negative branch of the first charging gun. The fourth charging module is connected in series with the fifth charging module. The positive electrode of the fourth charging module and the positive electrode of the fifth charging module are respectively connected to the first positive branch of the second charging gun, the negative electrode of the fourth charging module and the negative electrode of the fifth charging module are respectively connected to the first negative branch of the second charging gun, the positive electrode of the sixth charging module is connected to the second positive branch of the second charging gun, and the negative electrode of the sixth charging module is connected to the second negative branch of the second charging gun.

4. The power distributor for a dual-gun DC charging pile according to claim 1, characterized in that: It also includes a first shunt, a first DC meter, a second shunt and a second DC meter, the first shunt is connected to the first DC meter, the first shunt is respectively connected to the negative pole of the charging module, the negative high-voltage DC contactor and the negative output end of the first charging gun, the second shunt is connected to the second DC meter, the second shunt is respectively connected to the negative pole of the charging module, the negative high-voltage DC contactor and the negative output end of the second charging gun.

5. The power distributor for dual-gun DC charging pile according to claim 1 is characterized in that: It also includes a first high-voltage DC contactor and a second high-voltage DC contactor, the first high-voltage DC contactor is respectively connected to the positive pole of the charging module, the positive high-voltage DC contactor and the positive input terminal of the external first charging gun, and the second high-voltage DC contactor is respectively connected to the positive pole of the charging module, the positive high-voltage DC contactor and the positive input terminal of the external second charging gun.

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