120kW power intelligent allocation direct current charging pile

Abstract

The utility model relates to the technical field of charging piles, and discloses a 120kW power intelligent allocation direct current charging pile, which comprises a 380V three-phase five-wire system alternating current input module, an alternating current-to-direct current module, a charging module and a control module, and is characterized in that the alternating current-to-direct current module is electrically connected between the 380V three-phase five-wire system alternating current input module and the charging module; the AC-to-DC module comprises a rectifier AU1, a rectifier AU2, a rectifier AU3 and a rectifier AU4, and the rectifier AU1, the rectifier AU2, the rectifier AU3 and the rectifier AU4 are connected in parallel between the output end of the 380V three-phase five-wire system AC input module and the input end of the charging module. The AC-to-DC module is used for rectifying a three-phase AC into a DC to supply power to the charging module, the charging module is used for external charging, and the control module is electrically connected to the AC-to-DC module and the charging module. The control module is used for controlling the number of the rectifiers which are connected to the charging module in parallel by the AC-to-DC module. The charging pile has the advantages that the utilization rate of the single module of the charging pile is high, and the charging efficiency is high.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of charging piles, in particular to a 120kW power intelligent allocation direct-current charging pile. BACKGROUND

[0002] The charging pile is a device for providing electric energy for electric vehicles, which can convert alternating current power on the power grid side into direct current power suitable for electric vehicles, so as to charge the electric vehicles. The input end of the charging pile is directly connected with the alternating current power grid, and the output end is provided with a charging gun for charging the vehicle.

[0003] In the prior art, the charging pile generally includes two charging guns, and the total charging power of the charging pile is equally divided into the two charging guns, so that two electric vehicles can be charged at the same time.

[0004] However, different electric vehicles have different charging powers, and the existing integrated direct-current charging pile can only divide the power equally to each charging gun, and cannot achieve single particle module power output, so that the output efficiency of the charging pile is lower than 50% when charging the electric vehicle with a charging power lower than 30KW, and thus needs to be improved. CONTENT OF THE INVENTION

[0005] In order to improve the charging efficiency of the charging pile, the application provides a 120kW power intelligent allocation direct-current charging pile.

[0006] The 120kW power intelligent allocation direct-current charging pile provided by the application adopts the following technical scheme:

[0007] A 120kW power intelligent allocation direct-current charging pile, comprising a 380V three-phase five-wire alternating current input module, an alternating current to direct current module, a charging module and a control module, the alternating current to direct current module is electrically connected between the 380V three-phase five-wire alternating current input module and the charging module, the alternating current to direct current module comprises rectifiers AU1, AU2, AU3 and AU4, the rectifiers AU1, AU2, AU3 and AU4 are connected in parallel between the output end of the 380V three-phase five-wire alternating current input module and the input end of the charging module, the alternating current to direct current module is used for rectifying three-phase alternating current into direct current to supply power to the charging module, the charging module is used for external charging, and the control module is electrically connected to the alternating current to direct current module and the charging module, and the control module is used for controlling the number of rectifiers of the alternating current to direct current module connected in parallel to the charging module.

[0008] By adopting the technical scheme, when the charging pile charges the automobile, the three-phase alternating current power is first rectified into direct current by the AC-DC module to supply power to the charging module, and then the charging module charges externally, and the control module can reduce or increase the number of rectifiers connected in parallel to the charging module, so that the charging module can connect different numbers of rectifiers according to the charging power of the electric automobile, thereby increasing or reducing the charging power of the charging module, making the charging power of the charging module more suitable for the charging power of the electric automobile, and further improving the charging efficiency of the charging pile.

[0009] Optionally, the 380V three-phase five-wire AC input module includes a surge protector SPD and an air switch QF1, the surge protector SPD is connected in parallel to the 380V three-phase AC power supply, and the air switch QF1 is electrically connected between the 380V three-phase AC power supply and the surge protector SPD.

[0010] By adopting the technical scheme, when lightning strike, switch operation and other transient overvoltage occur in the charging pile power system, since the 380V three-phase five-wire AC input module is connected with the surge protector SPD, the nonlinear element of the surge protector SPD will respond quickly and present a low resistance state to discharge the overvoltage to the ground, thereby protecting the electrical equipment, prolonging the service life of the equipment and improving the reliability of the system.

[0011] Optionally, the 380V three-phase five-wire AC input module further includes a grid-side 380V three-phase AC power supply, a switching power supply UP1 and an air switch QF2, the switching power supply UP1 is connected in parallel to the grid-side 380V three-phase AC power supply, and the air switch QF2 is electrically connected between the grid-side 380V three-phase AC power supply and the switching power supply UP1.

[0012] By adopting the technical scheme, the switching power supply UP1 can convert the grid-side 380V three-phase AC power supply into a 12V standard voltage to meet the power supply requirement of other feedback signals.

[0013] Optionally, the AC-DC module further comprises DC contactor K5, DC contactor K6, DC contactor K7, DC contactor K8, DC contactor K9, and DC contactor K10, the DC contactor K5 is electrically connected between the output positive pole of the rectifier AU1 and the output positive pole of the rectifier AU2, the DC contactor K6 is electrically connected between the output negative pole of the rectifier AU1 and the output negative pole of the rectifier AU2, the DC contactor K7 is electrically connected between the output positive pole of the rectifier AU2 and the output positive pole of the rectifier AU3, the DC contactor K8 is electrically connected between the output negative pole of the rectifier AU2 and the output negative pole of the rectifier AU3, the DC contactor K9 is electrically connected between the output positive pole of the rectifier AU3 and the output positive pole of the rectifier AU4, and the DC contactor K10 is electrically connected between the output negative pole of the rectifier AU3 and the output negative pole of the rectifier AU4, and the charging module is connected in parallel to the output of the AC-DC module to take power.

[0014] By adopting the above technical scheme, when the charging power of the electric vehicle is low, the charging module only needs one rectifier to supply power, and the DC contactor K5-DC contactor K10 can be controlled to be opened or closed by the control module, so that the charging module is only electrically connected with the output terminal of one rectifier, and at this time, the charging power of the charging module is the lowest. By analogy, when the DC contactor K5 and the DC contactor K6 are closed, two rectifiers are electrically connected with the charging module, when the DC contactor K7 and the DC contactor K8 are closed, three rectifiers are electrically connected with the charging module, and when the DC contactor K9 and the DC contactor K10 are closed, four rectifiers are electrically connected with the charging module, at this time, the charging power of the charging module is the highest, and it is suitable for the charging power of the electric vehicle is high. By increasing the DC contactor switching, the power output of the single rectifier module is realized, so that the distribution mode of the rectifier is more intelligent, and the module utilization rate and the charging efficiency are improved.

[0015] Optionally, the charging module comprises shunt 1FL, shunt 2FL, DC power meter 1PJ, DC power meter 2PJ, DC gun line Q1 and DC gun line Q2, the shunt 1FL is electrically connected between the input end of the DC contactor K6 and the input end DC- of the DC gun line Q1, the DC power meter 1PJ is connected in parallel to the shunt 1FL and is electrically connected with the input end DC+ of the DC gun line Q1, the shunt 2FL is electrically connected between the output end of the DC contactor K10 and the input end DC- of the DC gun line Q2, and the DC power meter 2PJ is connected in parallel to the shunt 2FL and is electrically connected with the input end DC+ of the DC gun line Q2.

[0016] By adopting the above technical scheme, when the current flows through the shunt 1FL and the shunt 2FL, a voltage drop is generated, the voltage drop is proportional to the current flowing through the shunt, and the current value flowing through the shunt can be calculated by measuring the voltage drop. The DC energy meter 1PJ and the DC energy meter 2PJ calculate the total electric quantity by measuring the voltage signal. The DC energy meter 1PJ is connected in parallel with the shunt 1FL, and the DC energy meter 2PJ is connected in parallel with the shunt 2FL, which can improve the measurement accuracy and anti-interference capability.

[0017] Optionally, the control module comprises a charging controller ZK, and the DC energy meter 1PJ and the DC energy meter 2PJ are electrically connected with the charging controller ZK through an RS485 communication line.

[0018] By adopting the above technical scheme, the DC energy meter 1PJ and the DC energy meter 2PJ can upload the real-time collected power parameters to the charging controller ZK through the RS485 communication line, realize remote monitoring and data management, and provide detailed equipment operation state data for the staff to help them handle problems in time.

[0019] Optionally, the charging module further comprises a DC contactor 1K1, a DC contactor 1K2, a DC contactor 2K1 and a DC contactor 2K2. The DC contactor 1K1 is electrically connected between the DC energy meter 1PJ and the input end DC+ of the DC gun line Q1. The DC contactor 1K2 is electrically connected between the shunt 1FL and the input end DC- of the DC gun line Q1. The DC contactor 2K1 is electrically connected between the DC energy meter 2PJ and the input end DC+ of the DC gun line Q2. The DC contactor 2K2 is electrically connected between the shunt 2FL and the input end DC- of the DC gun line Q2. The output end of the charging controller ZK is electrically connected with the input end of the DC gun line Q1 and the DC gun line Q2 respectively. The charging controller ZK is electrically connected with the DC gun line Q1 and the DC gun line Q2 through CAN communication lines respectively. The charging controller ZK is in communication electric connection with the AC-DC module through the CAN communication line. The charging controller ZK is electrically connected with a network platform through a LAN network cable or a 4G network card.

[0020] By adopting the above technical scheme, when the DC gun line Q1 and the DC gun line Q2 jointly charge the electric vehicle, the charging controller ZK can control the DC contactor 1K1, the DC contactor 1K2, the DC contactor 2K1 and the DC contactor 2K2 to be closed or opened, so as to control the rectifier AU1 and the rectifier AU4 to supply power to the DC gun line Q1 or the DC gun line Q2. The charging controller ZK is connected with the AC-DC module through the CAN communication line, has the characteristics of efficient and reliable data transmission, and is connected with the network, which is convenient for platform remote management.

[0021] When the DC contactor 1K1 and the DC contactor 1K2 are closed, the DC contactor 2K1 and the DC contactor 2K2 are closed, and the DC contactor K5-DC contactor K10 are opened, the rectifier AU1 is electrically connected with the DC gun line Q1, and the rectifier AU4 is electrically connected with the DC gun line Q2; when the DC contactor 1K1 and the DC contactor 1K2 are closed, the DC contactor K5-DC contactor K10 are closed, and the DC contactor 2K1 and the DC contactor 2K2 are opened, the rectifier AU1 and the rectifier AU4 are electrically connected with the DC gun line Q1; when the DC contactor 1K1 and the DC contactor 1K2 are opened, the DC contactor K5-DC contactor K10 are closed, and the DC contactor 2K1 and the DC contactor 2K2 are closed, the rectifier AU1 and the rectifier AU4 are electrically connected with the DC gun line Q2.

[0022] Optionally, the charging pile further comprises an LED lamp panel and a touch liquid crystal screen LCD, the LED lamp panel is electrically connected with the charging controller ZK, and the touch liquid crystal screen LCD is electrically connected with the charging controller ZK through an RS232 communication line.

[0023] By adopting the above technical scheme, when the electric vehicle is charged by using the charging pile, the LED lamp panel can display different light effects according to the running state of the charging pile and the charging state of the vehicle, and indicate the working state of the charging pile, so that the user can perform the next operation according to the prompt. The touch liquid crystal screen LCD can be used by the user to more intuitively control the charging pile, the user can directly operate the touch liquid crystal screen LCD to select the charging power of the charging pile, so as to change the number of rectifiers connected to the DC gun line, and the RS232 communication line makes the data transmission between the touch liquid crystal screen LCD and the charging controller ZK more reliable, so that the control effect of the charging controller ZK on the AC-DC module is accurate.

[0024] Optionally, the charging pile further comprises a card swiping device FCR, and the card swiping device FCR is electrically connected with the charging controller ZK through an RS232 communication line.

[0025] By adopting the above technical scheme, when the charging pile needs to be used, the charging card only needs to be close to the card swiping device FCR, the card swiping device FCR can automatically identify the information of the charging card and verify it, after the verification is passed, the card swiping device FCR sends a signal to the charging controller ZK through the RS232 communication line, and starts charging, so that the card swiping device FCR makes the charging pile convenient to use and ensures the normal operation of the charging pile. The RS232 communication line makes the data transmission between the card swiping device FCR and the charging controller ZK reliable.

[0026] Optionally, the charging module comprises a first pre-charging circuit and a second pre-charging circuit, the first pre-charging circuit comprises a pre-charging contactor KM3 and a pre-charging resistor R1, the pre-charging contactor KM3 is electrically connected between the incoming line end of the DC contactor 1K1 and the pre-charging resistor R1, the pre-charging resistor R1 is electrically connected between the outgoing line end of the pre-charging contactor KM3 and the outgoing line end of the DC contactor 1K1, the second pre-charging circuit comprises a pre-charging contactor KM4 and a pre-charging resistor R2, the pre-charging contactor KM4 is electrically connected between the incoming line end of the DC contactor 2K1 and the pre-charging resistor R2, and the pre-charging resistor R2 is electrically connected between the outgoing line end of the pre-charging contactor KM4 and the outgoing line end of the DC contactor 2K1.

[0027] By adopting the above technical scheme, when the AC-to-DC module supplies power to the charging module, the pre-charging contactor KM3 and the pre-charging contactor KM4 are closed first, and the pre-charging resistor R1 and the pre-charging resistor R2 can share the voltage in the circuit, thereby reducing the current flowing to the charging module. After the first pre-charging circuit and the second pre-charging circuit complete pre-charging, the pre-charging contactor KM3 and the pre-charging contactor KM4 are disconnected, the DC contactor 1K1 and the DC contactor 2K1 are attracted, and power is supplied to the charging module. The first pre-charging circuit and the second pre-charging circuit avoid the large current impact in the power-on process, can protect the components in the circuit, and improve the stability.

[0028] In summary, the present application has at least one of the following beneficial technical effects:

[0029] 1. The number of rectifiers connected in parallel to the charging module is controlled by controlling the DC contactor switching through the charging controller ZK, thereby controlling the number of rectifiers connected in parallel to the charging module, realizing single-module power output, and improving the utilization rate of the module and the charging efficiency of the charging pile;

[0030] 2. By connecting the surge protector SPD in parallel in the 380V three-phase five-wire AC input module, the lightning protection effect of the charging pile is good, and the stability of the equipment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a whole circuit diagram of a 120kW power intelligent deployment direct current charging pile in the embodiment of the present application.

[0032] Figure 2 is a partial circuit diagram for showing a 380V three-phase five-wire AC input module in the embodiment of the present application.

[0033] Figure 3 is a partial circuit diagram for showing an AC-to-DC module in the embodiment of the present application.

[0034] Figure 4 is a partial circuit diagram for showing a charging module in the embodiment of the present application.

[0035] Figure 5 is a partial circuit diagram of the control module in the embodiment of the present application.

[0036] Legend:

[0037] 1, 380V three-phase five-wire AC input module; 2, AC-DC module; 3, charging module; 31, first pre-charge circuit; 32, second pre-charge circuit; 4, control module. DETAILED DESCRIPTION

[0038] The following will be described in detail in combination with the accompanying Figures 1-5 The present application will be further described in detail.

[0039] The embodiment of the present application discloses a 120kW power intelligent allocation DC charging pile.

[0040] Referring to Figure 1 and Figure 2 A 120kW power intelligent allocation DC charging pile includes a 380V three-phase five-wire AC input module 1, an AC-DC module 2, a charging module 3, and a control module 4. The AC-DC module 2 is electrically connected between the 380V three-phase five-wire AC input module 1 and the charging module 3. The 380V three-phase five-wire AC input module 1 includes a grid-side 380V three-phase AC power supply, a surge protector SPD, an air switch QF1, a switching power supply UP1, and an air switch QF2. The surge protector SPD is connected in parallel between the 380V three-phase AC power supply and the neutral line N. The air switch QF1 is electrically connected between the 380V three-phase AC power supply and the surge protector SPD. One input terminal of the switching power supply UP1 is connected in parallel to any one phase of the grid-side 380V three-phase AC power supply. The other input terminal of the switching power supply UP1 is connected in parallel to the neutral line N. The air switch QF2 is electrically connected between the grid-side 380V three-phase AC power supply and the switching power supply UP1. The surge protector SPD can discharge lightning to the ground, so that the charging pile has good lightning protection performance.

[0041] Referring to Figure 3 and Figure 4, the AC-DC module 2 is used for rectifying three-phase AC power into DC power to supply the charging module 3, the AC-DC module 2 comprises rectifiers AU1, AU2, AU3, AU4, DC contactors K5, K6, K7, K8, K9 and K10, the input ends of the rectifiers AU1, AU2, AU3 and AU4 are connected in parallel to the output end of the 380V three-phase five-wire AC input module 1, the output ends of the rectifiers AU1, AU2, AU3 and AU4 are connected in parallel as the output of the AC-DC module 2, and the input end of the charging module 3 is connected in parallel to the output end of the AC-DC module 2, the output power of each of the rectifiers AU1, AU2, AU3 and AU4 is 40W in the embodiment, and the specific power can be designed according to the customer demand in other cases. The charging module 3 is used for external charging, and comprises DC gun lines Q1 and Q2, the DC gun line Q1 is connected in parallel to the output end of the rectifier AU1, and the DC gun line Q2 is connected in parallel to the output end of the rectifier AU4.

[0042] With reference to Figure 3 and Figure 4 , the DC contactor K5 is connected in series between the output positive pole of the rectifier AU1 and the output positive pole of the rectifier AU2, the DC contactor K7 is connected in series between the output positive pole of the rectifier AU2 and the output positive pole of the rectifier AU3, the DC contactor K9 is connected in series between the output positive pole of the rectifier AU3 and the output positive pole of the rectifier AU4, the DC contactor K6 is connected in series between the output negative pole of the rectifier AU1 and the output negative pole of the rectifier AU2, the DC contactor K8 is connected in series between the output negative pole of the rectifier AU2 and the output negative pole of the rectifier AU3, the DC contactor K10 is connected in series between the output negative pole of the rectifier AU3 and the output negative pole of the rectifier AU4, the input end DC+ of the DC gun line Q1 is connected in parallel between the input end of the DC contactor K5 and the output positive pole of the rectifier AU1, the input end DC- of the DC gun line Q1 is connected in parallel between the input end of the DC contactor K6 and the output negative pole of the rectifier AU1, the input end DC+ of the DC gun line Q2 is connected in parallel between the output end of the DC contactor K9 and the output positive pole of the rectifier AU4, and the input end DC- of the DC gun line Q2 is connected in parallel between the output end of the DC contactor K10 and the output negative pole of the rectifier AU4.

[0043] With reference to Figure 4 and Figure 5, the charging module 3 further comprises a DC contactor 1K1, a DC contactor 1K2, a DC contactor 2K1, a DC contactor 2K2, a shunt 1FL, a shunt 2FL, a DC power meter 1PJ, a DC power meter 2PJ, a fuse 1FU and a fuse 2FU, the DC power meter 1PJ and the DC power meter 2PJ are electrically connected with the control module 4 through RS485 communication lines, the fuse 1FU is connected in series between the output positive pole of the rectifier AU1 and the input end of the DC contactor 1K1, the DC power meter 1PJ is electrically connected between the output end of the fuse 1FU and the input end of the DC contactor 1K1, the output end of the DC contactor 1K1 is connected to the input DC+ end of the DC gun line Q1, the shunt 1FL is electrically connected between the output negative pole of the rectifier AU1 and the input end of the DC contactor 1K2, the DC contactor 1K2 is electrically connected between the output end of the shunt 1FL and the input DC- end of the DC gun line Q1, and the DC power meter 1PJ is connected in parallel to the shunt 1FL. The fuse 2FU is connected in series between the output positive pole of the rectifier AU4 and the input end of the DC contactor 2K1, the DC power meter 2PJ is electrically connected between the output end of the fuse 2FU and the input end of the DC contactor 2K1, the output end of the DC contactor 2K1 is connected to the input DC+ end of the DC gun line Q2, the shunt 2FL is electrically connected between the output negative pole of the rectifier AU4 and the input end of the DC contactor 2K2, the DC contactor 2K2 is electrically connected between the output end of the shunt 2FL and the input DC- end of the DC gun line Q2, and the DC power meter 2PJ is connected in parallel to the shunt 2FL. The control module 4 is electrically connected with a main control relay, the signal sent by the control module 4 controls the switching of the DC contactor through the main control relay, and the DC contactor works when the main control relay is attracted.

[0044] Referring to Figure 3 , Figure 4 and Figure 5, By the above setting, the shunt 1FL, the shunt 2FL, the direct current electric energy meter 1PJ and the direct current electric energy meter 2PJ can measure the electric quantity provided by the AC-DC module 2 to the charging module 3, and feed back the measured parameter signal to the control module 4 through the RS485 communication line, so that the control module 4 controls. The direct current gun line Q1 and the direct current gun line Q2 can charge the electric vehicle, and during charging, the direct current gun line Q1 and the direct current gun line Q2 use 1-4 rectifiers respectively, when the direct current gun line uses one rectifier, the charging power is 40W, when two rectifiers are used, the charging power is 80W, when three rectifiers are used, the charging power is 80W, and when four rectifiers are used, the charging power is 120W. When the charging power of the electric vehicle is lower than 30W, the control module 4 controls the direct current contactor K5-direct current contactor K10 to be disconnected, and the direct current gun line Q1 or the direct current gun line Q2 uses only one rectifier, so as to realize single module power output, improve the efficiency of the module, and improve the charging speed. When the charging power of the electric vehicle is higher than 30W, the control module 4 controls the direct current contactor K5-direct current contactor K10 to be closed, so that the direct current gun line Q1 or the direct current gun line Q2 can use 1-4 rectifiers, so as to realize multi-module power output and improve the charging power.

[0045] Referring to Figure 4 , The charging module 3 further comprises a first pre-charging circuit 31 and a second pre-charging circuit 32, the first pre-charging circuit 31 comprising a pre-charging contactor KM3, a pre-charging resistor R1, the input end of the pre-charging contactor KM3 being connected in parallel between the input end of the direct current contactor 1K1 and the pre-charging resistor R1, and the pre-charging resistor R1 being connected in parallel between the output end of the pre-charging contactor KM3 and the output end of the direct current contactor 1K1, the second pre-charging circuit 32 comprising a pre-charging contactor KM4, a pre-charging resistor R2, the input end of the pre-charging contactor KM4 being connected in parallel between the input end of the direct current contactor 2K1 and the pre-charging resistor R2, and the pre-charging resistor R2 being connected in parallel between the output end of the pre-charging contactor KM4 and the output end of the direct current contactor 2K1. The first pre-charging circuit 31 and the second pre-charging circuit 32 can prevent the current from being too large to cause impact on the components in the circuit, improve the stability of the direct current gun line Q1 and the direct current gun line Q2, and prolong the service life of the charging pile.

[0046] Referring to Figure 5 , The control module 4 is used for controlling the number of rectifiers of the AC-DC module 2 connected in parallel to the charging module 3, the control module 4 is electrically connected between the AC-DC module 2 and the charging module 3, and the control module 4 comprises a charging controller ZK, the charging controller ZK is electrically connected with the rectifier AU1, the rectifier AU2, the rectifier AU3 and the rectifier AU4 through a CAN communication line, the charging controller ZK is electrically connected with the direct current gun line Q1 and the direct current gun line Q2 through the CAN communication line, and the charging controller ZK is electrically connected with a network platform through a LAN network cable or a 4G network card, so as to remotely monitor the operation data of the charging pile.

[0047] Referring to Figure 5 The charging controller ZK is electrically connected with an LED lamp panel, a touch liquid crystal screen LCD and a card swiping device FCR, and the charging controller ZK is electrically connected with the touch liquid crystal screen LCD and the card swiping device FCR through RS232 communication lines. The LED lamp panel can prompt the user about the running state of the charging pile, facilitating the user to operate, the touch liquid crystal screen LCD enables the user to change the charging power of the charging pile more intuitively, the card swiping device FCR makes the charging pile convenient to use, and the RS232 communication lines make the data transmission between the card swiping device FCR, the touch liquid crystal screen LCD and the charging controller ZK reliable.

[0048] The implementation principle of the 120kW power intelligent distribution direct current charging pile according to the embodiment of the application is as follows: the rectifier AU1, the rectifier AU2, the rectifier AU3 and the rectifier AU4 are connected in parallel between the 380V three-phase five-wire AC input module 1 and the charging module 3, and the direct current contactor is controlled by the charging controller ZK to be switched, so as to control the number of rectifiers connected in parallel to the charging module 3, so that the charging power of the flow gun line Q1 and the direct current gun line Q2 can be adjusted, so as to realize single module power output, improve the use efficiency of the rectifier module, realize intelligent distribution of the charging power, and thus improve the charging efficiency of the charging pile.

[0049] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so that: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A 120kW intelligent power distribution DC charging pile, characterized in that: The system includes a 380V three-phase five-wire AC input module (1), an AC-to-DC converter (2), a charging module (3), and a control module (4). The AC-to-DC converter (2) is electrically connected between the 380V three-phase five-wire AC input module (1) and the charging module (3). The AC-to-DC converter (2) includes rectifiers AU1, AU2, AU3, and AU4, which are connected in parallel to the 380V three-phase five-wire AC input module (1). The output terminal of the 0V three-phase five-wire AC input module (1) is connected to the input terminal of the charging module (3). The AC to DC module (2) is used to rectify the three-phase AC power into DC power to supply power to the charging module (3). The charging module (3) is used for external charging. The control module (4) is electrically connected to the AC to DC module (2) and the charging module (3). The control module (4) is used to control the number of rectifiers connected in parallel to the charging module (3) by the AC to DC module (2).

2. The 120kW intelligent power distribution DC charging pile according to claim 1, characterized in that: The 380V three-phase five-wire AC input module (1) includes a surge protector SPD and an air switch QF1. The surge protector SPD is connected in parallel to the 380V three-phase AC power supply, and the air switch QF1 is electrically connected between the 380V three-phase AC power supply and the surge protector SPD.

3. The 120kW intelligent power distribution DC charging pile according to claim 1, characterized in that: The 380V three-phase five-wire AC input module (1) also includes a grid-side 380V three-phase AC power supply, a switching power supply UP1, and an air switch QF2. The switching power supply UP1 is connected in parallel to the grid-side 380V three-phase AC power supply, and the air switch QF2 is electrically connected between the grid-side 380V three-phase AC power supply and the switching power supply UP1.

4. The 120kW intelligent power distribution DC charging pile according to claim 1, characterized in that: The AC-to-DC module (2) further includes DC contactors K5, K6, K7, K8, K9, and K10. DC contactor K5 is electrically connected between the positive output terminal of rectifier AU1 and the positive output terminal of rectifier AU2. DC contactor K6 is electrically connected between the negative output terminal of rectifier AU1 and the negative output terminal of rectifier AU2. DC contactor K7 is electrically connected between the positive output terminal of rectifier AU2 and the positive output terminal of rectifier AU3. DC contactor K8 is electrically connected between the negative output terminal of rectifier AU2 and the negative output terminal of rectifier AU3. DC contactor K9 is electrically connected between the positive output terminal of rectifier AU3 and the positive output terminal of rectifier AU4. DC contactor K10 is electrically connected between the negative output terminal of rectifier AU3 and the negative output terminal of rectifier AU4. The charging module (3) is connected in parallel to the output terminal of the AC-to-DC module (2) to draw power.

5. A 120kW intelligent power distribution DC charging pile according to claim 4, characterized in that: The charging module (3) includes a shunt 1FL, a shunt 2FL, a DC energy meter 1PJ, a DC energy meter 2PJ, a DC charging line Q1, and a DC charging line Q2. The shunt 1FL is electrically connected between the input terminal of the DC contactor K6 and the input terminal DC- of the DC charging line Q1. The DC energy meter 1PJ is connected in parallel to the shunt 1FL and is electrically connected to the input terminal DC+ of the DC charging line Q1. The shunt 2FL is electrically connected between the output terminal of the DC contactor K10 and the input terminal DC- of the DC charging line Q2. The DC energy meter 2PJ is connected in parallel to the shunt 2FL and is electrically connected to the input terminal DC+ of the DC charging line Q2.

6. A 120kW intelligent power distribution DC charging pile according to claim 5, characterized in that: The control module (4) includes a charging controller ZK, and the DC power meter 1PJ, DC power meter 2PJ and the charging controller ZK are electrically connected by an RS485 communication line.

7. A 120kW intelligent power distribution DC charging pile according to claim 6, characterized in that: The charging module (3) further includes DC contactors 1K1, 1K2, 2K1, and 2K2. DC contactor 1K1 is electrically connected between the DC energy meter 1PJ and the input terminal DC+ of the DC power line Q1. DC contactor 1K2 is electrically connected between the shunt 1FL and the input terminal DC- of the DC power line Q1. DC contactor 2K1 is electrically connected between the DC energy meter 2PJ and the input terminal DC+ of the DC power line Q2. DC contactor 2K2 is electrically connected between the shunt 2FL and the input terminal DC- of the DC power line Q2. The output terminal of the charging controller ZK is electrically connected to the input terminals of DC gun line Q1 and DC gun line Q2 respectively. The charging controller ZK is electrically connected to DC gun line Q1 and DC gun line Q2 respectively via CAN communication lines. The charging controller ZK is electrically connected to the AC to DC module (2) via CAN communication lines. The charging controller ZK is electrically connected to the network platform via LAN network cable or 4G network card. The charging controller ZK can control the DC contactors 1K1, 1K2, 2K1, and 2K2 to close or open.

8. A 120kW intelligent power distribution DC charging pile according to claim 7, characterized in that: The charging pile also includes an LED light board and a touch LCD screen. The LED light board is electrically connected to the charging controller ZK, and the touch LCD screen and the charging controller ZK are electrically connected by an RS232 communication line.

9. A 120kW intelligent power distribution DC charging pile according to claim 8, characterized in that: The charging pile also includes a card reader FCR, which is electrically connected to the charging controller ZK via an RS232 communication line.

10. A 120kW intelligent power distribution DC charging pile according to claim 7, characterized in that: The charging module (3) includes a first pre-charging circuit (31) and a second pre-charging circuit (32). The first pre-charging circuit (31) includes a pre-charging contactor KM3 and a pre-charging resistor R1. The pre-charging contactor KM3 is electrically connected between the input terminal of the DC contactor 1K1 and the pre-charging resistor R1. The pre-charging resistor R1 is electrically connected between the output terminal of the pre-charging contactor KM3 and the output terminal of the DC contactor 1K1. The second pre-charging circuit (32) includes a pre-charging contactor KM4 and a pre-charging resistor R2. The pre-charging contactor KM4 is electrically connected between the input terminal of the DC contactor 2K1 and the pre-charging resistor R2. The pre-charging resistor R2 is electrically connected between the output terminal of the pre-charging contactor KM4 and the output terminal of the DC contactor 2K1.

Images