Four-gun integrated direct current pile

Abstract

The utility model discloses a four-gun integrated direct-current pile which comprises a molded case circuit breaker, an alternating-current contactor, an alternating-current-to-direct-current module, a charging gun, a high-voltage box, a fuse, a first direct-current contactor, a second direct-current contactor, a third direct-current contactor, a diverter and a main control board. Compared with a traditional double-gun integrated direct-current charging pile, the four-gun integrated direct-current charging pile has the following advantages and effects that two more charging guns can be provided under the condition that the overall size is not changed, so that the acceptance of the same station yard is multiplied, and the common phenomenon that one gun is difficult to solve in the peak period is greatly improved. Meanwhile, the automatic power distribution function of the four-gun integrated direct current also greatly improves the charging efficiency, and reduces the power waste caused by the fact that the power of the high-power pile cannot be reasonably distributed to the guns. Through structure optimization, market research and technology innovation, the four-gun-in-one direct current pile has market competitiveness and development prospects.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of charging pile, especially four gun integrated direct current pile. BACKGROUND

[0002] Firstly, the number of guns of conventional single gun and double gun integrated charging pile limits the ability of charging multiple vehicles by one pile, which cannot meet the charging demand in peak period under the market environment of exponential growth of new energy vehicle sales, reduces the income and also reduces the market competitiveness.

[0003] Secondly, the conventional single gun and double gun integrated charging pile cannot reasonably distribute its power for output, which will lead to low charging efficiency and certain resource waste in actual application facing different demand voltage and current. In view of the defects reflected by the market, we make up for it through two points, one is to meet the charging demand in peak period by redesigning the internal structure under the condition of unchanged size of the original charging pile, so that it can meet the assembly of four charging guns and increase the power of the whole pile, so that there will be one more charging gun for charging under the condition of unchanged number of piles in a station to meet the charging demand in peak period. The second is to complete the intelligent distribution of power by changing the logical layout of the output end, which can effectively improve the charging efficiency. Through the above two points, the four gun integrated pile will have great market competitiveness. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a four gun integrated direct current pile to solve the problems in the background art.

[0005] The above technical purpose of the utility model is realized by the following technical scheme:

[0006] A four gun integrated direct current pile, comprising a molded case circuit breaker, an AC contactor, an AC-DC module, a charging gun, a high-voltage box, a fuse, a first DC contactor, a second DC contactor, a third DC contactor, a shunt, and a main control board.

[0007] A three-phase AC power supply is connected to the input end of the molded case circuit breaker, the output end of the molded case circuit breaker is connected to the input end of the AC contactor, the control output of the AC contactor is connected to the AC-DC module, the AC-DC module can convert three-phase AC power into DC power for output, the AC-DC module has four sub-outputs connected to four charging guns through the high-voltage box, the positive electrode of each sub-output of the AC-DC module is connected to the positive electrode of the corresponding charging gun through the fuse and the first DC contactor, the negative electrode of the charging gun is returned to the negative electrode of the sub-output of the AC-DC module through the second DC contactor and the shunt.

[0008] The high-voltage box includes a positive high-voltage box and a negative high-voltage box, four third DC contactors are arranged in the positive high-voltage box, four fourth DC contactors are arranged in the negative high-voltage box, and the four third DC contactors and the four fourth DC contactors can realize the confluence control between four sub-outputs of the AC-DC module based on the conduction or shutdown of the DC contactors.

[0009] Further, the first branch circuit includes a miniature circuit breaker and a surge protector, the first branch circuit is connected to the incoming line end of the miniature circuit breaker through the L1, L2, L3 and N lines of the molded case circuit breaker, and is output to the surge protector through the miniature circuit breaker.

[0010] Further, the second branch circuit includes a leakage protector and an auxiliary power supply, the second branch circuit is connected to the incoming line end of the leakage protector through the L1 and N lines of the molded case circuit breaker, is output to the auxiliary power supply through the leakage protector, and converts single-phase AC power into DC power to supply power to the system through the auxiliary power supply.

[0011] Further, the number of the main control boards is three, and the main control boards are a main control board ZK, a main control board ZK1 and a main control board ZK2; the main control board ZK is connected with the control lines and feedback lines led by the first DC contactor and the second DC contactor on the first and second charging guns, respectively, the main control board ZK realizes communication interconnection with the electric vehicle through CAN communication; the main control board ZK1 is connected with the control lines and feedback lines led by the first DC contactor and the second DC contactor on the third and fourth charging guns, respectively, the main control board ZK1 realizes communication interconnection with the electric vehicle through CAN communication; and the main control board ZK2 is connected with the AC-DC module, the first DC contactor, the second DC contactor, the third DC contactor, the AC contactor and the surge protector.

[0012] The main control board ZK, the main control board ZK1 and the main control board ZK2 realize intercommunication through CAD communication.

[0013] Further, the main control board ZK, the main control board ZK1 and the main control board ZK2 are all connected with a touch screen, an indicator light and a card swiping device.

[0014] Further, the main control board ZK2 controls a cooling fan.

[0015] Further, the utility model also includes ammeters connected to the four sub-outputs of the AC-DC module, respectively.

[0016] Compared with the traditional two-gun integrated direct current charging pile, the four-gun integrated direct current charging pile can have two more charging guns under the condition that the overall size is unchanged, which makes the receiving capacity of the same station field multiply, and the common phenomenon of one gun being difficult to find in peak period is greatly improved. Meanwhile, the automatic power distribution function of the four-gun integrated direct current charging pile greatly improves the charging efficiency and reduces the power waste caused by the power being unable to be reasonably distributed to the gun due to the high-power pile. Through the optimization of the structure, the market research and the technical innovation, the four-gun integrated direct current charging pile has very market competitiveness and development prospect. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is an electrical schematic diagram of the positive high-voltage box in the embodiment;

[0018] Figure 2 is an electrical schematic diagram of the positive high-voltage box in the embodiment;

[0019] Figure 3 is an electrical schematic diagram of the negative high-voltage box in the embodiment. DETAILED DESCRIPTION

[0020] The utility model will be further explained in detail in combination with the drawings.

[0021] As shown in the accompanying Figures 1-3 , the embodiment discloses a four-gun integrated direct current pile, a 380V three-phase alternating current power is connected to the input end of a plastic shell circuit breaker QF, the output end of the plastic shell circuit breaker QF is connected to the input end of an alternating current contactor KM1, and the control output of the alternating current contactor KM1 is connected to a copper plate, three wires are used to connect the three-phase alternating current to the input end of an alternating current to direct current module, the alternating current to direct current module comprises eight rectifier modules, and the eight rectifier modules correspond to AU1, AU2, AU3, AU4, AU5, AU6, AU7 and AU8 in the accompanying Figure 1 .

[0022] The 380V three-phase alternating current is converted into direct current through the rectification function of the eight rectifier modules, the output end of each rectifier module is connected to the high-voltage box strong current wall penetration terminal through two positive wires and two negative wires, and the high-voltage box is connected to the circulating copper plate through wires in the internal high-voltage box, the circulating copper plate of the high-voltage box is composed of four L-shaped copper plates, two rectifier modules are connected to the L-shaped copper plate as a group, and the positive output and the negative output of the eight modules are connected in four groups, corresponding to the four-way sub-output of the alternating current to direct current module.

[0023] The high-voltage box comprises a positive high-voltage box and a negative high-voltage box, four third direct current contactors are arranged in the positive high-voltage box, four fourth direct current contactors are arranged in the negative high-voltage box, and the four third direct current contactors and the four fourth direct current contactors can realize the confluence control between the four-way sub-outputs of the alternating current to direct current module based on the conduction or shutdown of the third direct current contactors and the fourth direct current contactors.

[0024] The four third DC contactors correspond to KZ1, KZ2, KE3 and KZ4 in the drawings Figure 1 , the drawings Figure 2 and the drawings Figure 3 respectively; the four fourth DC contactors correspond to KZ5, KZ6, KE7 and KZ8 in the drawings Figure 1 and the drawings Figure 2 respectively. When one of the charging guns is working and the remaining three charging guns are in standby state, the four third DC contactors and the four fourth DC contactors can be controlled to be turned on to realize the confluence, thereby improving the charging efficiency. The four charging guns correspond to DC-1, DC-2, DC-3 and DC-4 in the drawings Figure 1 respectively.

[0025] Taking the first charging gun DC-1 as an example, the positive and negative poles of the output end of the first charging gun DC-1 are also connected to the L-shaped copper plate in the high-voltage box respectively. The positive pole of the rectifier module output passes through the L-shaped copper plate, the fuse 1FU of the positive pole of the output of the first charging gun DC-1, the first DC contactor 1K1 in turn, and then extends out of the high-voltage box through the L-shaped copper plate and is connected to the positive terminal of the first charging gun DC-1. The power is transmitted to the electric vehicle through the first charging gun DC-1, and then returned to the negative pole of the first charging gun DC-1 through the electric vehicle, the second DC contactor 1K2 and the shunt 1RSX, and then returned to the corresponding rectifier module to form a loop. The working principles of the second charging gun DC-2, the third charging gun DC-3 and the fourth charging gun DC-4 are the same as above.

[0026] There are two branch circuits at the input end of the molded case circuit breaker QF. The first branch circuit is connected to the input terminal of the miniature circuit breaker QF1 through the L1, L2, L3 and N line rows of the molded case circuit breaker QF, and is output to the surge protector SPD through the miniature circuit breaker QF1, mainly for leading the transient current caused by the impact of the power grid and lightning to the surge protector SPD to protect the normal operation of the charging pile. The second branch circuit is connected to the input terminal of the leakage protector QF2 through the L1 and N rows of the molded case circuit breaker QF, and is output to the auxiliary power supply UP1 and UP2 through the leakage protector QF2, and the auxiliary power supply UP1 and UP2 convert single-phase alternating current into direct current to supply power to the system. The number of main control boards is three, which are the main control board ZK, the main control board ZK1 and the main control board ZK2. All charging processes of the first charging gun DC-1 and the second charging gun DC-2 are completed by the control board ZK. Taking the first charging gun DC-1 as an example, the control lines and feedback lines on the first DC contactor 1K1 and the second DC contactor 1K2 of the first charging gun DC-1 are connected to the main control board ZK through the wall terminal from the high-voltage box, and the protocol conversion board of the first charging gun DC-1 transmits the BMS data of the electric vehicle to the main control board ZK through CAN communication to achieve the communication interconnection between the pile and the vehicle, and the second charging gun DC-2 is the same. All charging processes of the third charging gun DC-3 and the fourth charging gun DC-4 are completed by the control board ZK1, and the same is true. The start, stop and corresponding parameter debugging of the first charging gun DC-1 and the second charging gun DC-2 are completed by the touch screen LCD on the main control board ZK, and the touch screen LCD and the main control board ZK communicate through RS232; the start, stop and corresponding parameter debugging of the third charging gun DC-3 and the fourth charging gun DC-4 are completed by the touch screen LCD on the main control board ZK1, and the touch screen LCD and the main control board ZK1 communicate through RS232.

[0027] The main control board ZK, the main control board ZK1 and the main control board ZK2 are all connected with the card swiping device FCR, which is directly powered by the corresponding main control board and also communicates through RS232.

[0028] The main control board ZK2 is mainly used for controlling the turn-on or turn-off of the four third DC contactors and the four fourth DC contactors, thereby being capable of reasonably distributing the output of the eight rectifier modules to the four charging guns. The main control board ZK2 further comprises a cooling fan, the eight rectifier modules are communicated with the main control board ZK2 through CAN, the feedback line and the coil control line of the AC contactor KM1, the start-stop of the cooling fan, and the feedback of the surge protector SPD are all connected to and controlled by the main control board ZK2. The communication among the main control board ZK, the main control board ZK1 and the main control board ZK2 is completed by CAN communication, the CAN reserved port of the main control board ZK2 is led out to the CAN communication reserved port of the main control board ZK, and then a group of the CAN communication reserved port of the main control board ZK is branched to the CAN communication reserved port of the main control board ZK1 and is connected in parallel with a 120-ohm resistor to enhance the communication among the three main control boards. The touch screen LCD on the main control board ZK2 is used for setting the turn-on or turn-off frequency of the four third DC contactors and the four fourth DC contactors. The four-gun integrated DC charging pile is controlled by the three main control boards to realize the automatic power distribution and the same charging of the four guns.

[0029] In addition, an ammeter is connected to each of the four sub-outputs of the AC-to-DC module, and the four ammeters correspond to 1PJ, 2PJ, 3PJ and 4PJ in the attached drawings respectively. Figure 1

[0030] The specific embodiment is only an explanation of the utility model, and is not a limitation of the utility model. Those skilled in the art can make modifications to the embodiment without creative contribution after reading the specification, but as long as the modifications are within the scope of the claims of the utility model, they are protected by the patent law.​

Claims

1. A four-gun integrated direct current pile, characterized by , including the molded case circuit breaker, the AC contactor, the AC-DC module, the charging gun, the high voltage box, the fuse, the first DC contactor, the second DC contactor, the third DC contactor, the shunt and the main control board; The three-phase AC power is connected to the input end of the molded case circuit breaker, the output end of the molded case circuit breaker is connected to the input end of the AC contactor, the control output of the AC contactor is connected to the AC-DC module, the AC-DC module can convert the three-phase AC power into DC power for output, the AC-DC module has four sub-outputs connected to four charging guns through the high voltage box, the positive pole of each sub-output of the AC-DC module is connected to the positive pole of the corresponding charging gun through the fuse and the first DC contactor, and the negative pole of the charging gun is returned to the negative pole of the sub-output of the AC-DC module through the second DC contactor and the shunt. The high voltage box includes the positive high voltage box and the negative high voltage box, four third DC contactors are arranged in the positive high voltage box, and four fourth DC contactors are arranged in the negative high voltage box, and the four third DC contactors and the four fourth DC contactors can realize the confluence control between the four sub-outputs of the AC-DC module based on the conduction or shutdown of the third DC contactors and the fourth DC contactors.

2. The four-gun integrated direct-current pile according to claim 1, characterized in that: The first branch circuit includes the miniature circuit breaker and the surge protector, the first branch circuit is connected to the input end of the miniature circuit breaker through the L1, L2, L3 and N lines of the molded case circuit breaker, and is output to the surge protector through the miniature circuit breaker.

3. The four-gun integrated direct current pile according to claim 1, characterized in that: The second branch circuit includes the leakage protector and the auxiliary power supply, the second branch circuit is connected to the input end of the leakage protector through the L1 and N lines of the molded case circuit breaker, is output to the auxiliary power supply through the leakage protector, and converts single-phase AC power into DC power to supply power to the system through the auxiliary power supply.

4. The four-gun integrated direct current pile according to claim 2, characterized in that: The number of the main control boards is three, which are the main control board ZK, the main control board ZK1 and the main control board ZK2; the main control board ZK is connected to the control lines and feedback lines led by the first DC contactor and the second DC contactor of the first and second charging guns, the main control board ZK is connected to the electric vehicle through CAN communication; the main control board ZK1 is connected to the control lines and feedback lines led by the first DC contactor and the second DC contactor of the third and fourth charging guns, the main control board ZK1 is connected to the electric vehicle through CAN communication; the main control board ZK2 is connected to the AC-DC module, the first DC contactor, the second DC contactor, the third DC contactor, the AC contactor and the surge protector; the main control board ZK, the main control board ZK1 and the main control board ZK2 are interconnected through CAD communication.

5. The four-gun integrated direct current pile according to claim 4, characterized in that: The main control board ZK, the main control board ZK1 and the main control board ZK2 are all connected to the touch screen, the indicator light and the card reader.

6. The four-gun integrated direct current pile according to claim 4, characterized in that: The cooling fan controlled by the main control board ZK2 is further included.

7. The four-gun integrated DC pile according to claim 4, characterized in that: The electric meter connected to the four sub-outputs of the AC-DC module is further included.

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