Power distribution unit and charging pile

Abstract

Disclosed in the present application are a power distribution unit and a charging pile. The power distribution unit is applied to the charging pile and comprises a processing unit, at least one first-type switch, and a plurality of second-type switches, wherein a first end of the first-type switch is connected to an external input power source; first ends of the plurality of second-type switches are connected to a second end of the first-type switch, and output ends of the plurality of second-type switches are connected to loads; the processing unit is connected to control ends of all first-type switches and control ends of all second-type switches and is configured to control, on the basis of a received charging instruction, the first-type switch and the second-type switches to be turned on, so as to provide charging power for charging guns; and the on-off capacity of the first-type switch is greater than A, and the on-off capacity of each second-type switch is less than B, where A is greater than B.

Description

Power distribution unit and charging pile

[0001] The present application claims priority to Chinese Patent Application No. 202421063750.9, filed on May 15, 2024, Chinese Patent Application No. 202420950230.3, filed on April 30, 2024, and Chinese Patent Application No. 202410602792.3, filed on May 15, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of power distribution, in particular to a power distribution unit and a charging pile. BACKGROUND

[0003] The existing PDU technical solutions are divided into two types, one is to use all high on-off switches, and the other is to use all low on-off switches. These two solutions cannot be compatible in performance and cost, and the market competitiveness is insufficient.

[0004] The switch solution with full high on-off capability can meet the on-off performance under high voltage and large current conditions, has high safety and long service life. However, the price and volume of the switch and copper bar are high, and the number of switches used is large, resulting in high cost of the entire PDU solution. In addition, the overall volume is large, which is not conducive to miniaturization and has poor compatibility.

[0005] The switch solution with full low on-off capability has poor on-off capability under high voltage and large current conditions, and is prone to switch failure or fire. The service life of the switch is completely dependent on the control of the system software and the normal working environment, which may cause safety hazards and short service life. TECHNICAL PROBLEM

[0006] The main purpose of the present application is to provide a power distribution unit with high safety and low cost. TECHNICAL SOLUTION

[0007] To achieve the above purpose, the power distribution unit provided by the present application is applied to a charging pile, and the power distribution unit comprises:

[0008] a processing unit, at least one first type switch, and at least one second type switch;

[0009] The first end of the at least one first type switch is connected with an external input power supply.

[0010] The first end of the at least one second type switch is connected to the second end of the at least one first type switch, and the output end of the at least one second type switch is connected to a load.

[0011] The processing unit is connected to the control end of all first type switches and the control end of all second type switches respectively, and is configured to control the first type switches and the second type switches to be turned on according to the received charging instruction, so as to provide charging power for the charging gun.

[0012] The on-off capability of the first type switch is greater than A, the on-off capability of the second type switch is less than B, and A is greater than B.

[0013] In an embodiment, the number of the second type switches is multiple.

[0014] The first ends of the first number of second type switches are connected to each other and to the second end of the first type switch.

[0015] The first ends of the second number of second type switches are connected to each other and to the external input power supply.

[0016] The first number of second type switches, the second number of second type switches, and a third number of charging guns are connected, and a third number of charging loops are constructed.

[0017] The first number is greater than or equal to a set value, the second number is greater than or equal to a set value, and the third number is less than or equal to a set value.

[0018] The processing unit is configured to control the first type switches and the corresponding second type switches to be turned on according to the received charging instruction, so as to provide charging power for the corresponding charging gun.

[0019] In an embodiment, the number of the first type switches is multiple; the first end of each first type switch is connected to the positive output end of a corresponding external input power supply, and the second end is connected to the first end of the first number of second type switches.

[0020] The negative output end of the multiple external input power supplies is connected to the first end of the second number of second type switches respectively.

[0021] In an embodiment, the power distribution unit further comprises at least one switch.

[0022] The first end of the switch is connected to the negative output end of the external input power supply, the second end is connected to the second type switch, and the control loop is connected to the processing unit.

[0023] In an embodiment, the at least one switch comprises a first type switch and / or a second type switch.

[0024] In an embodiment, the power distribution unit further comprises: a first copper bar and a second copper bar;

[0025] The first copper bar is connected to the second end of the plurality of first-type switches and the first end of the first number of second-type switches, respectively;

[0026] The second copper bar is connected to the negative output end of the plurality of external input power supplies and the first end of the second number of second-type switches, respectively.

[0027] The application further provides a charging pile, which comprises:

[0028] at least one voltage conversion module, at least one charging gun, and the power distribution unit;

[0029] The input end of the voltage conversion module is connected to an alternating current, and the voltage conversion module is configured to output after rectifying the alternating current;

[0030] The power distribution unit is connected to the output end of the same number of voltage conversion modules as the number of first-type switches in the power distribution unit;

[0031] The power distribution unit is connected to the at least one charging gun, and is configured to provide charging power for the corresponding charging gun according to the received charging instruction.

[0032] In an embodiment, the charging pile further comprises:

[0033] a plurality of power distribution units;

[0034] The plurality of power distribution units are respectively connected to at least one voltage conversion module; wherein the power distribution unit is connected to the output end of the same number of voltage conversion modules as the number of first-type switches in the power distribution unit.

[0035] In an embodiment, the charging pile further comprises:

[0036] a control module connected to the at least one charging gun, and configured to obtain, through the charging gun, an expected charging power of a device to be charged connected to the charging gun;

[0037] The control module is connected to the plurality of power distribution units, and is configured to output a corresponding charging instruction to the power distribution unit connected to the charging gun according to the expected charging power, so as to charge the device to be charged at the expected charging power.

[0038] In an embodiment, the control module is connected to the plurality of power distribution units, and is configured to output a corresponding charging instruction to the power distribution unit connected to the charging gun according to the expected charging power, and to turn on a corresponding charging loop;

[0039] The control module is also connected with the at least one voltage conversion module respectively, and is configured to output corresponding charging power instructions to the voltage conversion modules connected with the power distribution unit according to the expected charging power, and adjust the output power of the voltage conversion modules, so that the devices to be charged are charged at the expected charging power. Advantages

[0040] The application discloses a power distribution unit and a charging pile. The power distribution unit is applied to the charging pile, and the power distribution unit comprises a processing unit, at least one first-type switch and a plurality of second-type switches. The first end of the first-type switch is connected with an external input power supply. The first ends of the plurality of second-type switches are connected with the second end of the first-type switch, and the output ends of the plurality of second-type switches are connected to a load. The processing unit is connected with the control ends of all the first-type switches and the control ends of all the second-type switches respectively, and is configured to control the first-type switches and the second-type switches to be turned on according to received charging instructions, so as to provide charging power for a charging gun. The turn-on and turn-off capacity of the first-type switch is greater than A, the turn-on and turn-off capacity of the second-type switch is less than B, and A is greater than B. The first-type switch with strong turn-on and turn-off capacity is arranged in a main loop with large current, and the second-type switch with weak turn-on and turn-off capacity is arranged in a secondary loop with small current, so that the system safety is met, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0042] Fig. 1 is a structural schematic diagram of an embodiment of the power distribution unit provided by the present application;

[0043] Fig. 2 is a structural schematic diagram of another embodiment of the power distribution unit provided by the present application;

[0044] Fig. 3 is a structural schematic diagram of still another embodiment of the power distribution unit provided by the present application;

[0045] Fig. 4 is a structural schematic diagram of still another embodiment of the power distribution unit provided by the present application;

[0046] Fig. 5 is a structural schematic diagram of an embodiment of the charging pile provided by the present application;

[0047] Fig. 6 is a structural schematic diagram of still another embodiment of the charging pile provided by the present application;

[0048] Fig. 7 is a structural schematic diagram of another embodiment of the charging pile provided by the application;

[0049] Fig. 8 is a structural schematic diagram of still another embodiment of the charging pile provided by the application.

[0050] Explanation of reference numerals:

[0051] Reference numeral Name Reference numeral Name 10 power distribution unit 140 switch 110 processing unit 20 voltage conversion module 120 first type switch 40 charging gun 130 second type switch KM1 AC contactor

[0052] The implementation, functional features and advantages of the application will be further described with reference to the embodiments and the accompanying drawings. Embodiment of the application

[0053] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only some of the embodiments of the application, but not all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the application.

[0054] It should be noted that if the embodiments of the application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0055] In addition, if the embodiments of the application involve descriptions of “first”, “second”, etc., the descriptions of “first”, “second”, etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first” and “second” can explicitly or implicitly include at least one of the features. In addition, “and / or” or “and / or” appearing throughout the text means that the three parallel schemes are included, for example, “A and / or B” includes A scheme, or B scheme, or A and B are satisfied at the same time. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of those of ordinary skill in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope claimed by the application.

[0056] With reference to FIG. 1, FIG. 7 and FIG. 8, the present application proposes a power distribution unit 10, which aims to provide a high-safety and low-cost power distribution unit 10. In the present application, the power distribution unit 10 is designed by using a high-make and break capacity switch in combination with a low-make and break capacity switch. The high-make and break capacity switch is used to bear the make and break isolation of the circuit, and has superior electrical life performance, which can reliably ensure the life capacity under high-voltage and high-current working conditions, and ensure the safety of the system. The low-make and break capacity switch is used to realize flexible power distribution. Compared with the traditional all-high-make and break capacity switch scheme, the number of high-value switches can be greatly reduced, while meeting the characteristics of high safety and long service life.

[0057] The present application proposes a power distribution unit 10, which is applied to a charging pile. The power distribution unit 10 comprises:

[0058] a processing unit 110, at least one first type switch 120, and at least one second type switch 130;

[0059] A first end of the at least one first type switch 120 is connected to an external input power supply;

[0060] A first end of the at least one second type switch 130 is connected to a second end of the at least one first type switch 120, and an output end of the at least one second type switch 130 is connected to a load;

[0061] The processing unit 110 is connected to control ends of all first type switches 120 and control ends of all second type switches 130, respectively, for controlling the first type switches 120 and the second type switches 130 to conduct according to a received charging instruction, and providing charging power for a charging gun 40.

[0062] Wherein, a make and break capacity of the first type switch 120 is greater than A, a make and break capacity of the second type switch 130 is less than B, and A is greater than B.

[0063] It should be noted that in the present scheme, the number of the first type of switch 120 and the second type of switch 130 is not limited. The power distribution unit 10 is applied to a charging pile or a charging station, and the charging pile and the charging pile rectify the mains into direct current and then charge the vehicle connected through the charging gun 40 through the power distribution unit 10. But considering special circumstances, the charging pile or the charging pile charges the vehicle by connecting the power generated by the generator in the case of power disconnection. Among them, if the alternating current output by the alternating current generator is connected, the alternating current is rectified to provide charging power for the vehicle; if the direct current output by the direct current generator is connected, the direct current is connected to the first end of the first type of switch 120 after voltage stabilization. In the present application, the first end of the first type of switch 120 is connected to an external input power supply, which can be a voltage conversion module 20 in a charging pile or a charging station, or a device that provides direct current voltage.

[0064] The first end of the at least one second type of switch 130 is connected to the second end of the first type of switch 120, and the output end of the at least one second type of switch 130 is connected to a load; wherein the on-off capability of the first type of switch 120 is greater than A, the on-off capability of the second type of switch 130 is less than B, and A is greater than B.

[0065] The on-off capability of the first type of switch 120 is stronger than that of the second type of switch 130, that is, under the same specified conditions, the expected current value that the first type of switch 120 can turn on and off at a given voltage is higher than that of the second type of switch 130. The load can include a plurality of vehicle batteries respectively connected to the plurality of second type of switches 130 through a plurality of charging guns 40. The plurality of second type of switches 130 can be connected to a plurality of charging guns 40, wherein the number of the plurality of second type of switches 130 is greater than or equal to the number of the plurality of charging guns 40; assuming the number of the charging guns 40 is a third number; the third number of the second type of switches 130 of the plurality of second type of switches 130 are respectively connected in one-to-one correspondence with the third number of the charging guns 40. Since the charging gun 40 corresponds to the corresponding second type of switch 130 one by one, the on-off state of the second type of switch 130 can be changed to determine whether the charging gun 40 and the vehicle connected thereto can be charged. The charging gun 40 and the vehicle battery connected thereto to be charged can be regarded as a load.

[0066] The on-off capability of the first type switch 120 is greater than that of the second type switch 130, but it is to be noted that the specific selection of the first type switch 120 and the second type switch 130 is determined by the R&D personnel according to the specific requirements of the product, and A and B can be determined by the R&D personnel according to the requirements of the product circuit, which is not limited in the present application. The first end of the first type switch 120 is connected with an external input power supply to introduce a direct current voltage from the external input power supply; the second end of the first type switch 120 is connected with the first end of at least one second type switch 130; wherein the first ends of the plurality of second type switches 130 are connected with each other; if the number of the second type switches 130 is the same as the number of the charging guns 40, the second ends of the plurality of second type switches 130 can be connected with the plurality of charging guns 40 one by one. In an embodiment of the present application, the second ends of the plurality of second type switches 130 are connected with the plurality of charging guns 40 one by one; in the present embodiment, the processing unit controls the plurality of second type switches 130 to allow only one second type switch 130 to be turned on at the same time to provide charging power for one charging gun 40.

[0067] It is considered that the charging pile or the charging station uses the charging gun 40 connected with the power distribution unit 10 to charge a plurality of vehicles. When the vehicle battery is charged through the charging gun 40, the first type switch 120 is turned on, and the second type switch 130 connected with the charging gun 40 is turned on. If only the number of vehicle batteries to be charged is increased, the second type switch 130 corresponding to the newly added vehicle battery can be turned on; if it is necessary to stop charging of a vehicle, the second type switch 130 connected with the vehicle through the charging gun 40 can be turned off. In an embodiment of the present application, the first type switch 120 can be connected with the positive output end of the external input power supply, and the negative input end of the external input power supply is connected with a load to form a charging loop.

[0068] However, if the charging process of the vehicle connected with the power distribution unit 10 is to be stopped at the same time, the first type switch 120 needs to be controlled to be turned off. It is to be noted that since the circuit position of the first type switch 120 needs to pass through a large current value when turned on / off, the first type switch 120 with strong on-off capability is adopted. When the switch connected with a single charging gun 40 is turned on / off, a small current value needs to be passed through, and the second type switch 130 with weak on-off capability is sufficient. If the second type switch 130 in the present solution is replaced by the first type switch 120, although the requirement of circuit on-off can be met, the cost is large since the price of the switch is positively related to the on-off capability of the switch. If the first type switch 120 in the present solution is replaced by the second type switch 130, since the on-off capability of the second type switch 130 is weak, safety hazards may be caused.

[0069] In the power distribution unit disclosed in the application, the correspondence between the first switch 120 and the second switch 130 is as follows: one first switch 120 corresponds to a group of second switches 130, and the group of second switches 130 is connected only with the first switch 120; the group of second switches 130 can include multiple second switches 130 or only one second switch 130; the number of the second switches 130 is determined by the R&D personnel according to product requirements. In addition, the number of the second switches 130 corresponding to different first switches 120 can be different.

[0070] The processing unit 110 is connected with the control end of the first switch 120 and the control end of all the second switches 130, respectively, for controlling the first switch 120 and the second switch 130 to be turned on according to the received charging instruction, so as to provide charging power for the charging gun 40.

[0071] Since the charging guns 40 connected with different second switches 130 are different, the corresponding second switch 130 can be controlled to provide charging power for the corresponding charging gun 40 under the condition that the first switch 120 is turned on.

[0072] The processing module can include an MCU, an FPGA, a PLC, or a SOC processor.

[0073] The application discloses a power distribution unit 10 applied to a charging pile, which comprises a processing unit 110, at least one first switch 120, and multiple second switches 130; the first end of the first switch 120 is connected with an external input power supply; the first end of the multiple second switches 130 is connected with the second end of the first switch 120, and the output end of the multiple second switches 130 is connected to a load; the processing unit 110 is connected with the control end of all the first switches 120 and the control end of all the second switches 130, respectively, for controlling the first switch 120 and the second switch 130 to be turned on according to the received charging instruction, so as to provide charging power for the charging gun 40; wherein the on-off capacity of the first switch 120 is greater than A, the on-off capacity of the second switch 130 is less than B, and A is greater than B. The application sets the first switch 120 with strong on-off capacity in the main circuit with large current and sets the second switch 130 with weak on-off capacity in the secondary circuit with small current, so as to meet the system safety while reducing the cost.

[0074] Referring to FIGS. 1, 2, 7, and 8, in an embodiment of the application, the number of the second switches 130 is multiple;

[0075] The first ends of the first quantity of the second type of switches 130 are connected to each other and to the second ends of the first type of switches 120;

[0076] The first ends of the second quantity of the second type of switches 130 are connected to each other and to the external input power supply;

[0077] The first quantity of the second type of switches 130, the second quantity of the second type of switches 130, and a third quantity of the charging guns 40 are connected and form a third quantity of charging loops;

[0078] The first quantity is greater than or equal to a set value, the second quantity is greater than or equal to a set value, and the third quantity is less than or equal to a set value.

[0079] The processing unit 110 is configured to control the first type of switches 120 and the corresponding second type of switches 130 according to the received charging instruction, to turn on the corresponding charging loop, and to provide charging power for the corresponding charging gun 40.

[0080] The processing unit 110 is configured to control the first type of switches 120 and the corresponding second type of switches 130 according to the received charging instruction, to turn on the corresponding charging loop, and to provide charging power for the corresponding charging gun 40.

[0081] In the embodiment, the first quantity of the second type of switches 130, the second quantity of the second type of switches 130, and a third quantity of the charging guns 40 are connected and form a third quantity of charging loops. Among the first quantity, the third quantity of the second type of switches 130 are connected to the positive input ends of the third quantity of the charging guns 40 one by one; among the second quantity, the third quantity of the second type of switches 130 are connected to the negative input ends of the third quantity of the charging guns 40 one by one, thereby forming the third quantity of charging loops. The first quantity and the second quantity are both greater than the third quantity. The difference between the first quantity and the third quantity is a redundant switch connected to the positive input end of the charging gun 40; the difference between the second quantity and the third quantity is a redundant switch connected to the negative input end of the charging gun 40. Considering the actual operation, when one or more charging guns 40 connected to the second type of switches 130 fail and cannot continue to be used during actual operation of the power distribution unit 10, the redundant switch can be used to establish electrical connection with the charging gun 40, thereby avoiding the need to replace the entire power distribution unit 10 due to the above-mentioned wire failure. The above-mentioned redundant setting can save maintenance costs and reduce troubleshooting time. In an embodiment of the present application, the first quantity can be equal to the second quantity.

[0082] Referring to FIG. 3, FIG. 7 and FIG. 8, in an embodiment, the number of the first type of switches 120 is multiple; the first end of each of the first type of switches 120 is connected to the positive output end of each of the multiple external input power sources one by one, and the second end is connected to the first end of the first number of the second type of switches 130;

[0083] The negative output end of each of the multiple external input power sources is connected to the first end of the second number of the second type of switches 130.

[0084] In the embodiment, the number of the first type of switches 120 is multiple, and a plurality of external input power sources can be connected accordingly; the output voltage values of the multiple external input power sources can be the same or different. In an embodiment of the application, the multiple first type of switches 120 output the same voltage output by the multiple external input power sources to the first number of the second type of switches 130, thereby improving the load capacity of the charging gun 40. It should be noted that the processing unit 110 is connected to the control end of the multiple first type of switches 120, and can determine the specific first type of switch 120 to be turned on according to the expected charging power in the received charging instruction and the output power of each external input power source, so that the external input power source in use can provide the expected charging power for the corresponding charging gun 40. In addition, if the output power of the external input power source is the same, the processing unit 110 can also obtain the number of the first type of switches 120 to be turned on.

[0085] In another embodiment of the application, since the output voltage values of the multiple external input power sources are different, and the charging voltage of the vehicle connected to the multiple charging guns 40 can be different due to the differences in design indicators. In this embodiment, one first type of switch 120 can be connected to multiple external input power sources 10 with different output voltages; when the voltage output by the charging gun 40 connected to the first type of switch 120 through the corresponding second type of switch 130 needs to be changed, different external input power sources can be replaced so that the output voltage of the external input power source connected to the first type of switch 120 corresponds to the voltage required to be output by the charging gun 40.

[0086] In an embodiment of the application, the power distribution unit 10 further comprises a first copper bar and a second copper bar;

[0087] The first copper bar is connected to the second end of the multiple first type of switches 120 and the first end of the first number of the second type of switches 130, respectively;

[0088] The second copper bar is connected to the negative output end of the multiple external input power sources and the first end of the second number of the second type of switches 130, respectively.

[0089] In the embodiment, it is to be noted that, considering that the current passing through the first type of switch 120 is greater than that passing through the second type of switch 130, in engineering practice, the current-carrying capacity of the wires used by the two is different, that is, the diameters of the wires are different; wherein the diameter of the wire connected to the first type of switch 120 is wider. Due to the difference in diameter, and the number of the second type of switch 130 to be connected can be relatively large; in order to facilitate connection, the second ends of the plurality of first type of switches 120 and the first ends of the first number of second type of switches 130 are connected by a first copper bar; and the negative output ends of the plurality of external input power supplies and the first ends of the second number of second type of switches 130 are connected by a second copper bar. It is to be noted that the first copper bar and the second copper bar cannot be in contact to prevent the external input power supply from being short-circuited.

[0090] In another embodiment of the present application, if the first type of switch 120 and the second type of switch 130 are arranged in the same circuit board, other conductive products can be used to connect the first type of switch 120 and the second type of switch 130 without affecting the normal operation of other circuits of the circuit board. In an embodiment, the first type of switch 120 and the second type of switch 130 in the same circuit board can be directly connected without using conductive products for connection.

[0091] Referring to FIGS. 4, 7 and 8, in an embodiment of the present application, the power distribution unit 10 further comprises at least one switch;

[0092] The first end of the switch is connected to the negative output end of the external input power supply, the second end is connected to the second type of switch 130, and the control loop is connected to the processing unit 110.

[0093] In the embodiment, a switch is arranged between the power distribution unit 10 and the negative electrode of the external input power supply, so that after the first type of switch 120 is disconnected for a period of time, the switch can be disconnected to completely disconnect the external input power supply from the charging gun 40. If the switch does not exist, after the first type of switch 120 is disconnected, there is a negative pressure at the negative input end of the charging gun 40 or at the second type of switch 130, which can cause a safety hazard.

[0094] In the embodiment, not all external input power supplies are connected to the switch; the embodiment at least includes the following three cases:

[0095] Firstly, the number of external input power supplies is one, and the switch is connected to the negative output end of the external input power supply;

[0096] Secondly, the number of external input power supplies is multiple, but only the negative output end of one of the external power supplies is connected to the switch;

[0097] Thirdly, the number of the external input power sources is multiple, but only part of the negative output terminals of the power sources are connected with the corresponding number of the switches one by one.

[0098] Fourthly, the number of the external input power sources is multiple, and all the negative output terminals of the power sources are connected with the corresponding number of the switches one by one.

[0099] In an embodiment of the present application, the at least one switch comprises the first type of switch 120 and / or the second type of switch 130.

[0100] In the embodiment, it is considered that the positive output terminal of the external input power source is connected with the first type of switch 120, and the negative output terminal is connected with the switch. If the switch is the first type of switch 120, the processing unit 110 can directly turn on / off the switch. If the switch is the second type of switch 130, the processing unit 110 needs to first turn on / off the first switch connected with the positive output terminal of the external input power source, and then turn on / off the second type of switch 130 accordingly.

[0101] All the at least one switch can be the first type of switch 120, the second type of switch 130, or both the first type of switch 120 and the second type of switch 130.

[0102] It should be noted that the processing unit 110 can number all the first type of switch 120 and number all the second type of switch 130. The numbers are stored, and a mapping relationship between the charging gun 40 and the corresponding numbered switch is established; when the specific charging gun 40 is inserted into the vehicle to be charged, the switch that needs to be controlled can be obtained through the specific charging gun 40 and the mapping relationship thereof; combined with the corresponding power control logic, the corresponding numbered switch can be controlled, and the charging of the vehicle to be charged can be started. Conversely, the process of stopping the charging gun 40 from charging the vehicle is similar.

[0103] Referring to FIGS. 5, 7 and 8, the present application further provides a charging pile, which comprises:

[0104] at least one voltage conversion module 20, at least one charging gun 40, and the power distribution unit 10;

[0105] The input end of the voltage conversion module 20 is connected with alternating current, for rectifying and outputting the alternating current;

[0106] The power distribution unit 10 is connected with the output end of the voltage conversion module 20 in the same number as the first type of switch 120 in the power distribution unit 10;

[0107] The power distribution unit 10 is connected with at least one charging gun 40, and is configured to provide charging power for the corresponding charging gun 40 according to the received charging instruction.

[0108] According to the embodiment of the power distribution unit 10, the voltage conversion module 20 connected with the power distribution unit 10 is related to the number of the first type of switch 120. Preferably, if the switch connected with the voltage conversion module 20 is the second type of switch 130, the power distribution unit 10 can access the voltage conversion module 20 with the same number of the first type of switch 120.

[0109] The input end of the voltage conversion module 20 can access the commercial power or other alternating current, and is configured to output the rectified alternating current to the power distribution unit 10. It should be noted that in the present application, the voltage conversion module 20 can be a controllable voltage conversion module 20 or an uncontrollable voltage conversion module 20. The circuit structure of the uncontrollable voltage conversion module 20 is determined, and the output voltage values of a plurality of uncontrollable voltage conversion modules 20 are the same. The controllable voltage conversion module 20 can be connected with a controller, and after receiving the instruction of the controller, the output power is adjusted according to the instruction; when no instruction is received, a fixed power can be output. It is easy to understand that the voltage conversion module 20 can be an external input power source in the above embodiments.

[0110] The power distribution unit 10 can be connected with a plurality of voltage conversion modules 20 and at least one charging gun 40. The power distribution unit 10 can turn on the corresponding first type of switch 120 and the corresponding second type of switch 130 according to the received charging instruction, so as to access the corresponding number of voltage conversion modules 20, and provide charging power for the corresponding charging gun 40, so that the charging gun 40 charges the vehicle connected therewith.

[0111] In an embodiment of the present application, the output voltages of the voltage conversion modules 20 can be different, and the power distribution unit 10 can provide corresponding charging power for the corresponding charging gun 40 according to the switching of the output voltages of different voltage conversion modules 20.

[0112] The charging pile comprises the power distribution unit 10, and the specific structure of the power distribution unit 10 is referred to the above embodiments. Since the present charging pile adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be described here.

[0113] The charging pile can further comprise an alternating current contactor KM1, and the alternating current contactor KM1 is arranged between the three-phase alternating current and the voltage conversion module 20.

[0114] ​​​​​​​Referring to FIG. 6 and FIG. 7, in an embodiment of the present application, the charging pile further comprises:

[0115] a plurality of power distribution units 10;

[0116] The plurality of power distribution units 10 are respectively connected with at least one voltage conversion module 20; wherein the power distribution unit 10 is connected with the output end of the voltage conversion module 20 which is the same number as the first type switch 120 in the power distribution unit 10.

[0117] In the embodiment, the charging pile comprises a plurality of power distribution units 10. Compared with the charging pile with only one power distribution unit 10, in the embodiment, the plurality of power distribution units 10 can connect a plurality of voltage conversion modules 20, thereby improving the load capacity of the charging pile; and the increase of the number of power distribution units 10 can allow the charging pile to charge more vehicles.

[0118] In an embodiment of the present application, the charging pile further comprises:

[0119] a control module, respectively connected with the at least one charging gun 40, for obtaining the expected charging power of the to-be-charged device connected with the charging gun 40 through the charging gun 40;

[0120] The control module is respectively connected with the plurality of power distribution units 10, for outputting the corresponding charging instruction to the power distribution unit 10 connected with the charging gun 40 according to the expected charging power, so as to charge the to-be-charged device at the expected charging power.

[0121] In the embodiment, the control module is respectively connected with all the charging guns 40, and the number of the charging guns 40 is at least one. The control module obtains the expected charging power of the to-be-charged device through the handshake link between the charging gun 40 and the to-be-charged device. It should be noted that the to-be-charged device can include electric vehicles, but not only electric vehicles, and can include other electrically driven devices.

[0122] In the embodiment, the voltage conversion module 20 is an uncontrollable voltage conversion module 20, and the output power of the voltage conversion module 20 is stored in the program inside the control module. The control module can obtain the number of voltage conversion modules 20 to be connected according to the expected charging power and the output power of the voltage conversion module 20. The control module is respectively connected with the plurality of power distribution units 10, for outputting the corresponding charging instruction to the power distribution unit 10 connected with the charging gun 40 according to the expected charging power, so as to connect the corresponding number of voltage conversion modules 20 to the power distribution unit 10, thereby charging the to-be-charged device at the expected charging power.

[0123] The control module can include a MCU, an FPGA, a SOC controller or the like.

[0124] In an embodiment of the present application, the control module is connected with the plurality of power distribution units 10 respectively, and is configured to output corresponding charging instructions to the power distribution unit 10 connected with the charging gun 40 according to the expected charging power, and turn on the corresponding charging circuit.

[0125] The control module is also connected with the at least one voltage conversion module 20 respectively, and is configured to output corresponding charging power instructions to the voltage conversion module 20 connected with the power distribution unit 10 according to the expected charging power, and adjust the output power of the voltage conversion module 20, so as to charge the device to be charged at the expected charging power.

[0126] In the embodiment, the voltage conversion module 20 is a controllable voltage conversion module 20, and the control module can control the output power of the voltage conversion module 20 by sending instructions to the voltage conversion module 20. After obtaining the expected charging power, the control module obtains the number of voltage conversion modules 20 needed to be connected according to the maximum output power of the voltage conversion module 20 and the expected charging power; then controls the power distribution unit 10 to connect with the corresponding number of voltage conversion modules 20. Finally, the output power of the connected voltage conversion module 20 is adjusted, so that the charging gun 40 charges the device to be charged at the expected charging power.

[0127] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields based on the technical concept of the present application, and the content of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A power distribution unit, wherein, The power distribution unit is applied to a charging pile, and the power distribution unit comprises: a processing unit, at least one first type switch and at least one second type switch; a first end of the at least one first type switch is connected with an external input power supply; a first end of the at least one second type switch is connected with a second end of the at least one first type switch, and an output end of the at least one second type switch is connected to a load; the processing unit is connected with control ends of all first type switches and control ends of all second type switches respectively, and is used for controlling the first type switches and the second type switches to be turned on to provide charging power for a charging gun according to a received charging instruction; wherein, a turn-on-off capacity of the first type switch is greater than A, a turn-on-off capacity of the second type switch is less than B, and A is greater than B.

2. The power distribution unit of claim 1, wherein, The number of the second type switches is multiple; first ends of a first number of the second type switches are connected with each other and connected with the second end of the first type switch; first ends of a second number of the second type switches are connected with each other and connected with the external input power supply; the first number of the second type switches, the second number of the second type switches and a third number of charging guns are connected, and a third number of charging loops are constructed; wherein, the first number is greater than or equal to a set value, the second number is greater than or equal to a set value, and the third number is less than or equal to a set value; the processing unit is used for controlling the first type switches and corresponding second type switches to turn on corresponding charging loops to provide charging power for corresponding charging guns according to a received charging instruction.

3. The power distribution unit of claim 2, wherein, The number of the first type switches is multiple; first ends of the first type switches are connected with positive output ends of multiple external input power supplies one by one, and second ends are connected with first ends of the first number of the second type switches; negative output ends of the multiple external input power supplies are connected with first ends of the second number of the second type switches respectively.

4. The power distribution unit of any of claims 1 to 3, wherein, The power distribution unit further comprises at least one switch; a first end of the switch is connected with a negative output end of the external input power supply, a second end is connected with the second type switch, and a control loop is connected with the processing unit.

5. The power distribution unit of claim 4, wherein, The at least one switch comprises a first type switch and / or a second type switch.

6. The power distribution unit of claim 5, wherein, The power distribution unit further comprises a first copper bar and a second copper bar; the first copper bar is connected with second ends of the multiple first type switches and first ends of the first number of the second type switches respectively; the second copper bar is connected with negative output ends of the multiple external input power supplies and first ends of the second number of the second type switches respectively.

7. A charging post, wherein, The charging pile comprises: at least one voltage conversion module, at least one charging gun and the power distribution unit according to any one of claims 1 to 6; an input end of the voltage conversion module is connected with alternating current, and is used for outputting after rectification of the alternating current; the power distribution unit is connected with output ends of voltage conversion modules with the same number of first type switches in the power distribution unit respectively; the power distribution unit is connected with at least one charging gun, and is used for providing charging power for corresponding charging guns according to a received charging instruction.

8. The charging station of claim 7, wherein, The charging pile further comprises: multiple power distribution units; The plurality of power distribution units are respectively connected with at least one voltage conversion module; wherein the power distribution unit is connected with the output end of the voltage conversion module with the same number of first type switches in the power distribution unit.

9. The charging station of claim 8, wherein, The charging pile further comprises: A control module connected with the at least one charging gun respectively, for obtaining the expected charging power of the to-be-charged device connected with the charging gun through the charging gun; The control module is connected with the plurality of power distribution units respectively, for outputting the corresponding charging instruction to the power distribution unit connected with the charging gun according to the expected charging power, so as to charge the to-be-charged device at the expected charging power.

10. The charging station of claim 9, wherein, The control module is connected with the plurality of power distribution units respectively, for outputting the corresponding charging instruction to the power distribution unit connected with the charging gun according to the expected charging power, and conducting the corresponding charging loop; The control module is further connected with the at least one voltage conversion module respectively, for outputting the corresponding charging power instruction to the voltage conversion module connected with the power distribution unit according to the expected charging power, adjusting the output power of the voltage conversion module, so as to charge the to-be-charged device at the expected charging power.

Images