A DC dual-gun charging machine

Abstract

The present invention discloses a DC dual-gun charging machine, comprising a housing, two charging guns, and a DC charging power supply system arranged in the housing and connected to the two charging guns, wherein the DC charging power supply system comprises a DC input module, a DC D-level lightning protection module, two parallel charging circuit modules, and a single-double-gun switching contactor module; each of the charging circuit modules comprises a rectifier module, a charging output module, an auxiliary power supply output module, and an output terminal. The DC dual-gun charging machine is powered by a DC power supply, and a DC D-level lightning arrester circuit breaker is used to provide a rated 20KA (maximum discharge current 40KA) DC lightning protection; when the single-double-gun switching contactor module is disconnected, the two charging circuit modules can independently supply power to Gun A and Gun B; when the single-double-gun switching contactor module is closed, the system can supply power to one of Gun A / Gun B at full power.

Description

Technical Field

[0001] The invention relates to the field of electronic technology, and in particular to a DC dual-gun simultaneous charging integrated machine. Background Art

[0002] At present, in addition to the battery technology of new energy vehicles, the development of basic supporting charging facilities is also an important factor restricting the development of new energy vehicles. Among them, the number of charging piles, safety and the level of intelligent charging control are the more critical factors.

[0003] Currently, there are two types of charging piles on the market: AC charging piles and DC charging piles. AC charging piles are also called slow charging due to their slower charging speed. Therefore, it is more in line with the current development trend to vigorously develop DC fast charging technology and build DC charging piles. However, the power system of DC charging piles is relatively large and its safety performance is not ideal.

[0004] In view of this, it is necessary to propose a DC dual-gun charging all-in-one machine and a single-gun DC charging all-in-one machine with safe performance and small size. Summary of the invention

[0005] The present invention provides a DC dual-gun integrated charging machine to solve the technical problems of large size and low safety of existing DC charging piles.

[0006] In order to achieve the above-mentioned object, the present invention provides a DC dual-gun charging integrated machine, the DC dual-gun charging integrated machine, comprising a housing, two charging guns and a DC charging power supply system arranged in the housing and connected to the two charging guns, the DC charging power supply system comprising a DC input module, a DC D-level lightning protection module, two parallel charging circuit modules and a single-double-gun switching contactor module; each of the charging circuit modules comprises a rectifier module, a charging output module, an auxiliary power supply output module and an output terminal; wherein,

[0007] The DC input module includes a positive input line and a negative input line;

[0008] The input line of the surge arrester of the DC Class D lightning protection module is connected to the positive input line and the negative input line, and the PE line of the surge arrester is connected to the cabinet PE end of the DC dual-gun charging integrated machine;

[0009] The charging circuit module is connected in parallel with the DC Class D lightning protection module; wherein,

[0010] The rectifier module comprises a plurality of first DC rectifier circuit units connected in parallel and a busbar, a DC input end of each first DC rectifier circuit unit is connected to the positive input line and the negative input line, and output ends of the plurality of first DC rectifier circuit units connected in parallel are connected via the busbar;

[0011] The output terminals include a charging output terminal and an auxiliary power supply output terminal;

[0012] The charging output module is connected between the output end connection of the bus bar and the charging output terminal, and the charging output module includes a high-voltage fuse connected between the output end connection of the bus bar and the charging output terminal;

[0013] The auxiliary power supply output module includes a second DC rectifier circuit unit, the input end of the second DC rectifier circuit unit is connected to the positive input line and the negative input line in parallel, and the output end of the second DC rectifier circuit unit is connected to the auxiliary power supply output terminal;

[0014] The single-double-gun switching contactor module includes a positive contactor connected between the positive terminals of the output ends of the rectifier modules of the two parallel charging circuit modules, and a negative contactor connected between the negative terminals of the output ends of the rectifier modules of the two parallel charging circuit modules.

[0015] Preferably, the DC rectifier circuit unit includes two high-efficiency rectifier circuit units and at least one common high-efficiency rectifier circuit unit.

[0016] Preferably, the charging output module further includes a first contactor, and the first contactor is connected in series with the high-voltage fuse.

[0017] Preferably, the auxiliary power supply output module further includes a secondary lightning protection module and a second contactor, and the second contactor is connected between the positive terminal of the auxiliary power supply output terminal and the positive terminal of the output end of the second DC rectifier circuit unit.

[0018] Preferably, the auxiliary power supply output module further includes at least one third DC rectifier circuit unit, and an input end of the third DC rectifier circuit unit is connected to the positive input line and the negative input line in parallel.

[0019] Preferably, a load switch and a high-voltage fuse are further provided between the DC input module and the two parallel charging circuit modules.

[0020] Preferably, the output terminal further includes a communication terminal.

[0021] Preferably, it also includes an active energy meter connected in parallel to the charging output module.

[0022] The DC dual-gun charging integrated machine in the solution of the present application is powered by a DC power supply, adopts a DC D-class lightning arrester circuit breaker, connected in parallel with the rectifier, and provides a rated 20KA (maximum discharge current 40KA) DC lightning protection; the DC dual-gun integrated machine has a maximum output power of 160KW and outputs an adjustable voltage of 0-1000Vdc; the two charging circuit modules can work independently with two guns or with a single gun. When the positive and negative contactors are disconnected, the A and B groups of modules can independently supply power to the A gun and the B gun; when the positive and negative contactors are closed, the system can supply power to the A gun / B gun at full power (only a single gun can work at this time). BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 the structures shown in these drawings without paying creative work.

[0024] Figure 1 A schematic diagram of a circuit module of a DC dual-gun charging machine according to an embodiment of the present invention;

[0025] Figure 2 The figure is a schematic diagram of the circuit structure of a DC dual-gun charging machine according to an embodiment of the present invention.

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their 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 at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Please refer to Figure 1 and Figure 2 The present invention provides a DC dual-charger integrated device, including a housing (not shown), two charging guns (not shown), and a DC charging power supply system 100 disposed in the housing and connected to the two charging guns. The DC charging power supply system 100 includes a DC input module 10, a DC D-level lightning protection module 40, two parallel charging circuit modules 20, and a single-dual-gun switching contactor module; each of the charging circuit modules 20 includes a rectifier module 30, a charging output module 50, an auxiliary power supply output module 60, and an output terminal 70.

[0032] Wherein, the DC input module 10 includes a positive input line and a negative input line;

[0033] The input line of the surge arrester 41 of the DC Class D lightning protection module 40 is connected to the positive input line and the negative input line, and the PE line of the surge arrester 41 is connected to the PE end of the cabinet (not shown) of the DC dual-gun charging integrated machine;

[0034] The charging circuit module 20 is connected in parallel with the DC Class D lightning protection module 40 .

[0035] The rectifier module 30 includes a plurality of first DC rectifier circuit units 31 (DCDC1, DCDC2, DCDC3, DCDC4, DCDC5, DCDC6) connected in parallel and a bus (not shown in the figure), the DC input end of each of the first DC rectifier circuit units 31 is connected to the positive input line and the negative input line, and the output ends of the plurality of first DC rectifier circuit units 31 connected in parallel are connected via the bus.

[0036] The output terminals 70 include charging output terminals (DC+ and DC-) and auxiliary power supply output terminals (S+ and S-).

[0037] The charging output module 50 is connected between the output end of the bus and the charging output terminals (DC+ and DC-), and the charging output module 50 includes a high-voltage fuse 51 connected between the output end of the bus and the charging output terminals (DC+ and DC-);

[0038] The auxiliary power supply output module 60 includes a second DC rectifier circuit unit 61, the input end of the second DC rectifier circuit unit 61 is connected to the positive input line and the negative input line in parallel, and the output end of the second DC rectifier circuit unit 61 is connected to the auxiliary power supply output terminals (S+ and S-);

[0039] The single-double-gun switching contactor module includes a positive contactor K7 connected between the positive terminals of the output ends of the rectifier modules 30 of the two parallel charging circuit modules 20, and a negative contactor K8 connected between the negative terminals of the output ends of the rectifier modules 30 of the two parallel charging circuit modules 20.

[0040] The DC dual-gun charging integrated machine in this embodiment is powered by a DC power supply, a DC D-class lightning arrester circuit breaker, connected in parallel with the rectifier, to provide a rated 20KA (maximum discharge current 40KA) DC lightning protection; the maximum output power of the integrated machine is 160KW, and the output is 0-1000Vdc adjustable voltage; the two charging circuit modules 20 can work independently with dual guns or with a single gun. When the positive and negative contactors K7 and K8 are disconnected, the A and B groups of modules can independently power the A gun and the B gun; when the positive and negative contactors K7 and K8 are closed, the system can power one of the A gun / B gun at full power (only a single gun can work at this time).

[0041] Preferably, in a preferred embodiment, the charging output module 50 also includes a first contactor 52 (K3, K4, K5, K6), and the first contactor 52 is connected in series with the high-voltage fuse 51. For example, the first contactor 52 is connected between the positive terminal DC+ of the charging output terminal and the high-voltage fuse 51, or the first contactor 52 is connected between the output end of the bus of the rectifier module 30 and the high-voltage fuse 51.

[0042] Preferably, in a preferred embodiment, the DC rectifier circuit unit 31 includes two high-efficiency rectifier circuit units and at least one common high-efficiency rectifier circuit unit. For example, two high-efficiency rectifier circuit units are used, and they work in parallel. The DC output of the rectifier module 30 is connected through the bus, and after passing through the high-voltage DC contactor 52, it is protected by the high-voltage fuse 51, and connected to the charging gun output through the charging output terminals (DC+ and DC-); the maximum output power of the integrated machine is 160KW, and the output voltage is 0-1000Vdc adjustable.

[0043] Preferably, in a preferred embodiment, the auxiliary power supply output module 60 also includes a secondary lightning protection module (not shown) and a second contactor 62, and the second contactor 62 is connected between the positive terminal S+ of the auxiliary power supply output terminal and the positive terminal of the output end of the second DC rectifier circuit unit 62.

[0044] Preferably, in a preferred embodiment, the auxiliary power supply output module 60 further includes at least one third DC rectifier circuit unit 63, the input end of the third DC rectifier circuit unit 63 is connected in parallel to the positive input line and the negative input line; the output voltage of the output end of the third DC rectifier circuit unit 63 can be the power supply voltage of the fan, the power supply voltage of the audio device, etc. It can be understood that in other embodiments, the number of the third DC rectifier circuit units 63 can be more to meet other power output needs.

[0045] Preferably, in a preferred embodiment, the output terminal 70 also includes a communication terminal.

[0046] Preferably, in a preferred embodiment, an active energy meter 53 connected in parallel to the charging output module 50 is also included.

[0047] Preferably, in a preferred embodiment, a load switch 90 and a high-voltage fuse 91 are further provided between the DC input module 10 and the two parallel charging circuit modules 20 .

[0048] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A DC dual-charger integrated device, comprising a housing, two charging guns, and a DC charging power supply system disposed in the housing and connected to the two charging guns. It is characterized in that The DC charging power supply system includes a DC input module, a DC D-level lightning protection module, two parallel charging circuit modules and a single-double-gun switching contactor module; each of the charging circuit modules includes a rectifier module, a charging output module, an auxiliary power supply output module and an output terminal; wherein, The DC input module includes a positive input line and a negative input line; The input line of the surge arrester of the DC Class D lightning protection module is connected to the positive input line and the negative input line, and the PE line of the surge arrester is connected to the cabinet PE end of the DC dual-gun charging integrated machine; The charging circuit module is connected in parallel with the DC Class D lightning protection module; wherein, The rectifier module comprises a plurality of first DC rectifier circuit units connected in parallel and a busbar, a DC input end of each first DC rectifier circuit unit is connected to the positive input line and the negative input line, and output ends of the plurality of first DC rectifier circuit units connected in parallel are connected via the busbar; The output terminals include a charging output terminal and an auxiliary power supply output terminal; The charging output module is connected between the output end connection of the bus bar and the charging output terminal, and the charging output module includes a high-voltage fuse connected between the output end connection of the bus bar and the charging output terminal; The auxiliary power supply output module includes a second DC rectifier circuit unit, the input end of the second DC rectifier circuit unit is connected to the positive input line and the negative input line in parallel, and the output end of the second DC rectifier circuit unit is connected to the auxiliary power supply output terminal; The single-double-gun switching contactor module includes a positive contactor connected between the positive terminals of the output terminals of the rectifier modules of the two parallel charging circuit modules, and a negative contactor connected between the negative terminals of the output terminals of the rectifier modules of the two parallel charging circuit modules; The first DC rectifier circuit unit includes two high-efficiency rectifier circuit units and at least one common high-efficiency rectifier circuit unit; wherein the two high-efficiency rectifier circuit units work in parallel, the DC output of the rectifier module is connected through the bus, after passing through the high-voltage DC contactor, it is protected by the high-voltage fuse, and connected to the charging gun output through the charging output terminal; the maximum output power of the all-in-one machine is 160KW, and the output voltage is 0-1000Vdc adjustable; The charging output module further includes a first contactor, which is connected in series with the high-voltage fuse; The auxiliary power supply output module further includes a secondary lightning protection module and a second contactor, wherein the second contactor is connected between the positive terminal of the auxiliary power supply output terminal and the positive terminal of the output end of the second DC rectifier circuit unit; The auxiliary power supply output module further includes at least one third DC rectifier circuit unit, and an input end of the third DC rectifier circuit unit is connected to the positive input line and the negative input line in parallel.

2. According to claim 1, the DC dual-gun charging machine It is characterized in that A load switch and a high-voltage fuse are also provided between the DC input module and the two parallel charging circuit modules.

3. The DC dual-gun charging integrated machine according to claim 1, It is characterized in that The output terminal also includes a communication terminal.

4. The DC dual-gun charging machine according to claim 1, It is characterized in that It also includes an active energy meter connected in parallel to the charging output module.

Images