Power distribution unit and charging pile

Abstract

The utility model discloses a power supply distribution unit and a charging pile, the power supply distribution unit is applied to the charging pile, and the power supply 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-class switch is connected with an external input power supply; the first ends of the plurality of second-class switches are connected with the second ends of the first-class switches, and the output ends of the plurality of second-class switches are connected to a load; the processing unit is respectively connected with the control ends of all the first-class switches and the control ends of all the second-class switches and is used for controlling the first-class switches and the second-class switches to be switched on according to a received charging instruction and providing charging power for the charging gun; wherein the on-off capability of the first type of switch is greater than A, the on-off capability of the second type of switch is smaller than B, and A is greater than B. According to the utility model, the first type of switch and the second type of switch are matched for use, so that the system safety is met, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution, and in particular to a power distribution unit and a charging pile. Background Art

[0002] There are two types of existing PDU technical solutions. One is to use all switches with high connection and disconnection capabilities; the other is to use all switches with low connection and disconnection capabilities. These two solutions cannot take into account both performance and cost, and lack market competitiveness.

[0003] The switch solution with full high connection and disconnection capacity can meet the connection and disconnection performance under high voltage and high current conditions, with high safety and long service life. However, the price and volume of switches and copper bars are very high, and the number of them used is large, resulting in a high cost for the entire PDU solution; in addition, the overall volume is also large, which is not conducive to miniaturization and has poor compatibility.

[0004] The switch solution with all low connection and disconnection capabilities has very poor connection and disconnection capabilities under load. It is very easy for the switch to fail or catch fire under high voltage and high current conditions. It completely relies on the control of the system software and the normal operating environment to ensure the service life of the switch, resulting in safety hazards for the entire machine and a short service life. Utility Model Content

[0005] The main purpose of the utility model is to provide a power distribution unit and a charging pile, aiming to provide a power distribution unit with high safety and low cost.

[0006] To achieve the above-mentioned purpose, the utility model proposes a power distribution unit, which is applied to a charging pile and includes:

[0007] a processing unit, at least one switch of the first type, and at least one switch of the second type;

[0008] The first end of the at least one first type switch is connected to an external input power source;

[0009] 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;

[0010] The processing unit is connected to the control ends of all the first type switches and the control ends of all the second type switches respectively, and is used 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;

[0011] Among them, the switching capacity of the first type of switch is greater than A, the switching capacity of the second type of switch is less than B, and A is greater than B.

[0012] In one embodiment, the number of the second type of switches is multiple;

[0013] The first ends of a first number of switches of the second type are connected to each other and to the second ends of the switches of the first type;

[0014] The first ends of the second number of second type switches are connected to each other and to the external input power source;

[0015] The first number of second-type switches, the second number of second-type switches, and a third number of charging guns are connected to form a third number of charging circuits;

[0016] 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;

[0017] The processing unit is used to control the first type switch and the corresponding second type switch according to the received charging instruction, turn on the corresponding charging circuit, and provide charging power for the corresponding charging gun.

[0018] In one embodiment, the number of the first type of switches is multiple; the first end of each of the first type of switches is connected to the positive output ends of multiple external input power supplies in a one-to-one correspondence, and the second end is connected to the first end of the first number of second type switches;

[0019] The negative output terminals of the plurality of external input power sources are respectively connected to the first terminals of the second number of second-type switches.

[0020] In one embodiment, the power distribution unit further comprises: at least one switch;

[0021] 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.

[0022] In one embodiment, the at least one switch includes a first type of switch and / or a second type of switch.

[0023] In one embodiment, the power distribution unit further comprises: a first copper bar and a second copper bar;

[0024] The first copper busbar is respectively connected to the second ends of the plurality of first-type switches and the first ends of the first number of second-type switches;

[0025] The second copper busbar is respectively connected to the negative output terminals of the plurality of external input power supplies and the first terminals of the second number of second-type switches.

[0026] The utility model also provides a charging pile, which comprises:

[0027] At least one voltage conversion module, at least one charging gun and the power distribution unit;

[0028] The input end of the voltage conversion module is connected to the alternating current, and is used to rectify the alternating current and output it;

[0029] The power distribution unit is respectively connected to the output ends of the voltage conversion modules with the same number of first-type switches in the power distribution unit;

[0030] The power distribution unit is connected to at least one charging gun and is used to provide charging power to the corresponding charging gun according to the received charging instruction.

[0031] In one embodiment, the charging pile further includes:

[0032] Multiple power distribution units;

[0033] The multiple power distribution units are respectively connected to at least one voltage conversion module; wherein the power distribution units are respectively connected to output ends of voltage conversion modules having the same number of first-type switches in the power distribution unit.

[0034] In one embodiment, the charging pile further includes:

[0035] A control module, connected to the at least one charging gun, respectively, for obtaining, through each charging gun, a desired charging power for a device to be charged connected to each charging gun;

[0036] The control module is connected to the multiple power distribution units respectively, and is used to output corresponding charging instructions 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 with the expected charging power.

[0037] In one embodiment, the control module is connected to the plurality of power distribution units respectively, and is used to output corresponding charging instructions to the power distribution unit connected to the charging gun according to the expected charging power, and to conduct the corresponding charging circuit;

[0038] The control module is also respectively connected to the at least one voltage conversion module, and is used to output corresponding charging power instructions to the voltage conversion module connected to the power distribution unit according to the expected charging power, and adjust the output power of the voltage conversion module, so as to charge the device to be charged with the expected charging power.

[0039] The utility model discloses a power distribution unit and a charging pile, wherein 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 to an external input power source; the first ends of the plurality of second-type switches are connected to the second ends of the first-type switches, and the output ends of the plurality of second-type switches are connected to a load; the processing unit is respectively connected to the control ends of all the first-type switches and the control ends of all the second-type switches, and is used to control the first-type switches and the second-type switches to be turned on according to the received charging instructions, so as to provide charging power for the charging gun; wherein 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. The utility model reduces the cost while meeting the system safety by setting the first-type switch with strong on-off capability in the main circuit with large current passing through, and setting the second-type switch with weak on-off capability in the secondary circuit with small current passing through. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0041] Figure 1 A schematic diagram of the structure of an embodiment of a power distribution unit provided by the utility model;

[0042] Figure 2 A schematic diagram of the structure of another embodiment of the power distribution unit provided by the utility model;

[0043] Figure 3 A schematic diagram of the structure of another embodiment of the power distribution unit provided by the utility model;

[0044] Figure 4 A schematic diagram of the structure of another embodiment of the power distribution unit provided by the utility model;

[0045] Figure 5 A schematic diagram of the structure of an embodiment of a charging pile provided by the utility model;

[0046] Figure 6 A schematic diagram of the structure of another embodiment of the charging pile provided by the utility model;

[0047] Figure 7 A schematic diagram of the structure of another embodiment of the charging pile provided by the utility model;

[0048] Figure 8 This is a schematic structural diagram of another embodiment of the charging pile provided by the utility model.

[0049] Description of Figure Numbers:

[0050] Label name Label name 10 Power Distribution Unit 140 switch 110 Processing Unit 20 Voltage conversion module 120 First class switch 40 Charging gun 130 Second type switch KM1 AC contactor

[0051] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0053] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0054] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0055] Reference Figure 1 , Figure 7 and Figure 8The utility model proposes a power distribution unit 10, aiming to provide a high-safety and low-cost power distribution unit 10. The power distribution unit 10 proposed by the utility model adopts a switch with high connection and disconnection capacity and a switch with low connection and disconnection capacity. The switch with high connection and disconnection capacity bears the connection and disconnection isolation of the circuit. By utilizing its superior electrical life performance, it can highly reliably guarantee the life capacity under high voltage and high current conditions and ensure the safety of the system; the switch with low connection and disconnection capacity realizes the flexible distribution of power; compared with the traditional switch solution with full high connection and disconnection capacity, it can greatly reduce the number of high-value switches while meeting its characteristics of high safety and long life.

[0056] The utility model provides a power distribution unit 10, which is applied to a charging pile. The power distribution unit 10 includes:

[0057] A processing unit 110, at least one first type switch 120, and at least one second type switch 130;

[0058] A first end of the at least one first type switch 120 is connected to an external input power source;

[0059] 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;

[0060] The processing unit 110 is connected to the control ends of all the first type switches 120 and the control ends of all the second type switches 130 respectively, and is used to control the first type switches 120 and the second type switches 130 to be turned on according to the received charging instruction, so as to provide charging power for the charging gun 40;

[0061] The switching capacity of the first type switch 120 is greater than A, the switching capacity of the second type switch 130 is less than B, and A is greater than B.

[0062] It should be noted that, in this solution, the number of the first type of switches 120 and the second type of switches 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 power into direct current and then charge the vehicle connected through the charging gun 40 through the power distribution unit 10. However, in view of special circumstances, when the mains power is disconnected, the charging pile or the charging pile charges the vehicle by connecting the electric energy generated by the generator. 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 utility model, the first end of the first type of switch 120 is connected to an external input power supply, and the external input power supply can be a voltage conversion module 20 in a charging pile or a charging station, or a device that provides a direct current voltage.

[0063] The first end of the at least one second-type switch 130 is connected to the second end of the first-type switch 120, and the output end of the at least one second-type switch 130 is connected to a load; wherein the on-off capacity of the first-type switch 120 is greater than A, the on-off capacity of the second-type switch 130 is less than B, and A is greater than B.

[0064] It is easy to understand that the on-off capability of the first type switch 120 is stronger than that of the second type switch 130, that is, under the same specified conditions, the expected current value that the first type switch 120 can connect and disconnect at a given voltage is higher than that of the second type switch 130. The load may include a plurality of vehicle batteries connected to the plurality of second type switches 130 one by one through a plurality of charging guns 40. The plurality of second type switches 130 may be connected to a plurality of charging guns 40, wherein the number of the plurality of second type switches 130 is greater than or equal to the number of the plurality of charging guns 40; assuming that the number of the charging guns 40 is a third number; the third number of second type switches 130 of the plurality of second type switches 130 are respectively connected to the third number of charging guns 40 in a one-to-one correspondence. Since the charging gun 40 corresponds to the corresponding second type switch 130 in a one-to-one correspondence, the charging gun 40 connected thereto and whether the vehicle can be charged can be determined by changing the on-off status of the second type switch 130. The charging gun 40 and the connected car battery to be charged may be regarded as a load.

[0065] The on-off capacity of the first type switch 120 is greater than that of the second type switch 130, but it should 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 the A and B can be determined by the R&D personnel according to the requirements of the product circuit, which is not limited by the present invention. The first end of the first type switch 120 is connected to the external input power supply, and the DC voltage is introduced from the external input power supply; the second end of the first type switch 120 is connected to 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 to 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 one by one to the plurality of the charging guns 40. In an embodiment of the present invention, the second ends of the plurality of second type switches 130 are respectively connected one by one to the plurality of the charging guns 40; in this embodiment, the processing unit controls the plurality of second type switches 130 so that only one second type switch 130 is turned on at the same time to provide charging power for one charging gun 40.

[0066] Consider the situation that a charging pile or charging station uses a charging gun 40 connected to the power distribution unit 10 to charge multiple cars. When a car battery obtains charging power through the charging gun 40, the first type of switch 120 is turned on, and the second type of switch 130 connected to the charging gun 40 is turned on. If only the number of car batteries to be charged is increased, it is sufficient to turn on the second type of switch 130 corresponding to the newly added car battery; if it is necessary to stop charging a certain car, it is sufficient to turn off the second type of switch 130 connected to the car through the charging gun 40. In one embodiment of the utility model, the first type of switch 120 can be connected to the positive output end of the external input power supply, and the negative input end of the external input power supply is connected to the load to form a charging circuit.

[0067] However, if the charging process of the car connected to the power distribution unit 10 is stopped at the same time, it is necessary to control the first type switch 120 to be turned off. It should be noted that since the current value required to be turned on / off is large when the circuit position where the first type switch 120 is located is turned on / off, a first type switch 120 with strong on / off capability is used. When the switch connected to a single charging gun 40 is turned on / off, the current value required to be turned on / off is small, and a second type switch 130 with weaker on / off capability is sufficient. If the second type switch 130 in this solution is replaced by the first type switch 120, although the requirements of circuit on / off can be met, the cost is relatively high because the price of the switch is positively correlated with the on / off capability of the switch. If the first type switch 120 in this solution is replaced by the second type switch 130, due to the weak on / off capability of the second type switch 130, it may cause safety hazards.

[0068] In the power distribution unit disclosed in the utility model, the corresponding relationship between the first type switch 120 and the second type switch 130 is as follows: one first type switch 120 corresponds to a group of second type switches 130, and the group of second type switches 130 is only connected to the first type switch 120; the group of second type switches 130 may include multiple second type switches 130, or only one second type switch 130; the number of the second type switches 130 is determined by the R&D personnel according to the product requirements. In addition, the number of the second type switches 130 corresponding to different first type switches 120 may be different.

[0069] The processing unit 110 is connected to the control end of the first type switch 120 and the control end of all the second type switches 130 respectively, and is used to control the first type switch 120 and the second type switch 130 to be turned on according to the received charging instruction, so as to provide charging power for the charging gun 40.

[0070] Since different second-type switches 130 are connected to different charging guns 40 , when the first-type switch 120 is turned on, the corresponding second-type switch 130 can be controlled to provide charging power for the corresponding charging gun 40 .

[0071] The processing module may include a processor such as MCU, FPGA, PLC or SOC.

[0072] The utility model discloses a power distribution unit 10, which is applied to a charging pile. The power distribution unit 10 includes: a processing unit 110, at least one first-type switch 120 and a plurality of second-type switches 130; the first end of the first-type switch 120 is connected to an external input power source; the first ends of the plurality of second-type switches 130 are connected to the second ends of the first-type switch 120, and the output ends of the plurality of second-type switches 130 are connected to a load; the processing unit 110 is respectively connected to the control ends of all the first-type switches 120 and the control ends of all the second-type switches 130, and is used to control the first-type switches 120 and the second-type switches 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 capability of the first-type switch 120 is greater than A, the on-off capability of the second-type switch 130 is less than B, and A is greater than B. The utility model sets the first-type switch 120 with strong on-off capability in the main circuit with large current, and sets the second-type switch 130 with weak on-off capability in the secondary circuit with small current, thereby meeting the system safety and reducing the cost.

[0073] Reference Figure 1 , Figure 2 , Figure 7 and Figure 8, in one embodiment of the utility model, the number of the second type of switches 130 is multiple;

[0074] The first ends of the first number of second type switches 130 are connected to each other and to the second ends of the first type switches 120;

[0075] The first ends of the second number of second type switches 130 are connected to each other and to the external input power source;

[0076] The first number of second-type switches 130 and the second number of second-type switches 130 are connected to a third number of charging guns 40 to form a third number of charging circuits;

[0077] 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;

[0078] The processing unit 110 is used to control the first type switch 120 and the corresponding second type switch 130 according to the received charging instruction, turn on the corresponding charging circuit, and provide charging power for the corresponding charging gun 40.

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

[0080] In this embodiment, the first number of second-type switches 130 and the second number of second-type switches 130 are connected to the third number of charging guns 40, and a third number of charging circuits are constructed. Among them, the third number of second-type switches 130 selected from the first number are connected one by one to the positive input ends of the third number of charging guns 40; the third number of second-type switches 130 selected from the second number are connected one by one to the negative input ends of the third number of charging guns 40, thereby forming a third number of charging circuits. Both the first number and the second number are greater than the third number. The difference between the first number and the third number is the redundant switch connected to the positive input end of the charging gun 40; the difference between the second number and the third number is the redundant switch connected to the negative input end of the charging gun 40. Considering the actual operation, when one or more of the wires connecting the charging gun 40 and the second-type switch 130 fail during the actual operation of the power distribution unit 10 and cannot be used anymore, 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 the time for handling failures. In an embodiment of the present invention, the first quantity may be equal to the second quantity.

[0081] Reference Figure 3 , Figure 7 and Figure 8 In one embodiment, the number of the first type switches 120 is multiple; the first end of each of the first type switches 120 is connected to the positive output ends of multiple external input power supplies one by one, and the second end is connected to the first end of the first number of second type switches 130;

[0082] The negative output terminals of the plurality of external input power sources are respectively connected to the first terminals of the second number of the second-type switches 130 .

[0083] In this embodiment, the number of the first type switches 120 is multiple, and multiple external input power supplies can be connected accordingly; the output voltage values ​​of the multiple external input power supplies can be the same or different. In one embodiment of the utility model, the multiple first type switches 120 output the same voltage output by multiple external input power supplies to the first number of second type 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 switches 120, and can decide to turn on the specific first type switch 120 according to the expected charging power in the received charging instruction and the output power of each external input power supply, so that the external input power supply put into use can provide the expected charging power for the corresponding charging gun 40. In addition, if the output power of the external input power supply is the same, the processing unit 110 can also obtain the number of the first type switches 120 that need to be turned on.

[0084] In another embodiment of the utility model, due to the different output voltage values ​​of the multiple external input power supplies and the different design indicators of the vehicles connected to the multiple charging guns 40, the charging voltage may be different. In this embodiment, a first-type switch 120 can be connected to multiple external input power supplies 10 with different output voltages; when the voltage output by the charging gun 40 connected to the first-type switch 120 through the corresponding second-type switch 130 needs to be changed, different external output power supplies can be replaced so that the output voltage of the external input power connected to the first-type switch 120 corresponds to the voltage required to be output by the charging gun 40.

[0085] In an embodiment of the present utility model, the power distribution unit 10 further includes: a first copper bar and a second copper bar;

[0086] The first copper busbar is respectively connected to the second ends of the plurality of first-type switches 120 and the first ends of the first number of second-type switches 130;

[0087] The second copper busbar is respectively connected to the negative output terminals of the plurality of external input power sources and the first terminals of the second number of second-type switches 130 .

[0088] In this embodiment, it should be noted that, considering that the current passing through the first type switch 120 is greater than that passing through the second type switch 130, in engineering practice, the current carrying capacity of the wires used by the two is different, that is, there is a difference in the diameter of the wires; wherein, the diameter of the wire connecting the first type switch 120 is wider. Due to the difference in diameter, and the number of the second type switches 130 that need to be connected may be relatively large; in order to facilitate the connection, the second ends of the multiple first type switches 120 and the first ends of the first number of second type switches 130 are connected by a first copper bar; the negative output ends of the multiple external input power supplies and the first ends of the second number of second type switches 130 are connected by a second copper bar. It should be noted that the first copper bar and the second copper bar cannot be in contact with each other to prevent the external input power from being short-circuited.

[0089] In another embodiment of the utility model, if the first type switch 120 and the second type switch 130 are arranged in the same circuit board, other conductive products can be used to connect the first type switch 120 and the second type switch 130 without affecting the normal operation of other circuits of the circuit board. In one embodiment, the first type switch 120 and the second type switch 130 in the same circuit board can be directly connected without using conductive products.

[0090] Reference Figure 4 , Figure 7 and Figure 8 In an embodiment of the present utility model, the power distribution unit 10 further includes: at least one switch;

[0091] 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 130 , and the control loop is connected to the processing unit 110 .

[0092] In this embodiment, a switch is provided between the power distribution unit 10 and the negative electrode of the external input power source, and the switch can be turned off after the first type switch 120 is turned off for a period of time to completely disconnect the external input power source from the charging gun 40. If the switch does not exist, after the first type switch 120 is turned off, negative pressure exists at the negative input end of the charging gun 40 or the second type switch 130, which may cause safety hazards.

[0093] In this embodiment, it is not limited that all external input power sources are connected to the switch; this embodiment includes at least the following three situations:

[0094] First, the number of the external input power source is one, and there is a switch connected to the negative output terminal of the external input power source;

[0095] Second, there are multiple external input power sources, but only the negative output terminal of one of the external power sources is connected to the switch;

[0096] Third, there are multiple external input power sources, but only the negative output terminals of some of the power sources are connected one by one to the corresponding number of switches;

[0097] Fourthly, there are multiple external input power sources, and the negative output terminals of all external input power sources are connected one by one to the corresponding number of switches.

[0098] In an embodiment of the present invention, the at least one switch includes a first type switch 120 and / or a second type switch 130 .

[0099] In this embodiment, consider the case where the positive output terminal of the external input power supply is connected to the first type switch 120, and the negative output terminal is connected to the switch. If the switch is the first type switch 120, the processing unit 110 can directly turn on / off the switch. If the switch is the second type switch 130, the processing unit 110 needs to first turn on / off the first switch connected to the positive output terminal of the external input power supply, and then turn on / off the second type switch 130 accordingly.

[0100] The at least one switch may be all first-type switches 120 , all second-type switches 130 , or include both first-type switches 120 and second-type switches 130 .

[0101] It should be noted that the processing unit 110 can number all the first-type switches 120 and all the second-type switches 130. The numbers are stored, and a mapping relationship between the charging gun 40 and the corresponding numbered switches is established; when the specific charging gun 40 is inserted into the vehicle to be charged, the switch to be controlled can be obtained through the specific charging gun 40 and its mapping relationship; combined with the corresponding power control logic, the corresponding numbered switch can be controlled to start charging the vehicle to be charged. Conversely, the process of stopping a charging gun 40 from charging the vehicle is similar.

[0102] Reference Figure 5 , Figure 7 and Figure 8 The utility model also proposes a charging pile, which comprises:

[0103] At least one voltage conversion module 20, at least one charging gun 40 and the power distribution unit 10;

[0104] The input end of the voltage conversion module 20 is connected to the alternating current, and is used to rectify the alternating current and output it;

[0105] The power distribution unit 10 is respectively connected to the output ends of the voltage conversion modules 20 with the same number of the first type switches 120 in the power distribution unit 10;

[0106] The power distribution unit 10 is connected to at least one charging gun 40 and is used to provide charging power to the corresponding charging gun 40 according to the received charging instruction.

[0107] It can be obtained from the embodiment of the power distribution unit 10 that the voltage conversion modules 20 connected to the power distribution unit 10 are related to the number of the first type switches 120 therein. Preferably, if the switch connected to the voltage conversion module 20 is a second type switch 130, the power distribution unit 10 can be connected to the same number of voltage conversion modules 20 as the first type switches 120 therein.

[0108] The input end of the voltage conversion module 20 can be connected to the mains, or other alternating current, for rectifying the alternating current and outputting it to the power distribution unit 10. It should be noted that, in the present utility model, 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 determines that the output voltage values ​​of multiple uncontrollable voltage conversion modules 20 are the same. The controllable voltage conversion module 20 can be connected to a controller, and after receiving an instruction from the controller, adjust the output power 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 the external input power supply in the above embodiment.

[0109] The power distribution unit 10 can be connected to multiple voltage conversion modules 20 and connected to at least one charging gun 40. The power distribution unit 10 can turn on the corresponding first type switch 120 and the corresponding second type switch 130 according to the received charging instruction, thereby connecting the corresponding number of voltage conversion modules 20 and providing charging power to the corresponding charging gun 40, so that the charging gun 40 charges the vehicle connected thereto.

[0110] In an embodiment of the present invention, the output voltage of the voltage conversion module 20 may be different, and the power distribution unit 10 may provide corresponding charging power to the corresponding charging gun 40 according to the output voltage of the different voltage conversion modules 20 switched.

[0111] The charging pile includes the power distribution unit 10, and the specific structure of the power distribution unit 10 refers to the above embodiment. Since the charging pile adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0112] The charging pile may further include an AC contactor KM1 , which is disposed between the three-phase AC power and the voltage conversion module 20 .

[0113] Reference Figure 6 and Figure 7 In one embodiment of the utility model, the charging pile further includes:

[0114] A plurality of power distribution units 10;

[0115] The multiple power distribution units 10 are respectively connected to at least one voltage conversion module 20; wherein the power distribution units 10 are respectively connected to the output ends of the voltage conversion modules 20 with the same number of the first type switches 120 in the power distribution unit 10.

[0116] In this embodiment, the charging pile includes multiple power distribution units 10. Compared with a charging pile with only one power distribution unit 10, in this embodiment, multiple power distribution units 10 can be connected to multiple voltage conversion modules 20 to improve the load capacity of the charging pile; and the increase in the number of power distribution units 10 allows the charging pile to charge more vehicles.

[0117] In one embodiment of the utility model, the charging pile further includes:

[0118] A control module, connected to the at least one charging gun 40 respectively, for obtaining, through the charging guns 40, the desired charging power of the device to be charged connected to the charging guns 40;

[0119] The control module is connected to the multiple power distribution units 10 respectively, and is used to output corresponding charging instructions to the power distribution unit 10 connected to the charging gun 40 according to the expected charging power, so as to charge the device to be charged with the expected charging power.

[0120] In this embodiment, the control module is connected to all charging guns 40 respectively, and the number of the charging guns 40 is at least one. The control module obtains the expected charging power of the device to be charged through the handshake between the charging gun 40 and the device to be charged. It should be noted that the device to be charged may include electric vehicles, but not only electric vehicles, but also other devices with electric drive.

[0121] In this 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 that need 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 to the multiple power distribution units 10, and is used to output corresponding charging instructions to the power distribution unit 10 connected to the charging gun 40 according to the expected charging power, so that the power distribution unit 10 is connected to the corresponding number of voltage conversion modules 20, thereby charging the device to be charged with the expected charging power.

[0122] The control module may include a controller such as MCU, FPGA or SOC.

[0123] In an embodiment of the utility model, the control module is connected to the multiple power distribution units 10 respectively, and is used to output corresponding charging instructions to the power distribution unit 10 connected to the charging gun 40 according to the expected charging power, and turn on the corresponding charging circuit;

[0124] The control module is also respectively connected to the at least one voltage conversion module 20, and is used to output corresponding charging power instructions to the voltage conversion module 20 connected to 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 with the expected charging power.

[0125] In this 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 that need to be connected according to the maximum output power of the voltage conversion module 20 and the expected charging power; and then controls the power distribution unit 10 to connect 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.

[0126] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A power distribution unit, characterized in that: The power distribution unit is applied to a charging pile, and the power distribution unit includes: a processing unit, at least one switch of the first type, and at least one switch of the second type; The first end of the at least one first type switch is connected to an external input power source; 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; The processing unit is connected to the control ends of all the first type switches and the control ends of all the second type switches respectively, and is used 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; Among them, the switching capacity of the first type of switch is greater than A, the switching capacity of the second type of switch is less than B, and A is greater than B.

2. The power distribution unit according to claim 1, characterized in that: The number of the second type of switches is multiple; The first ends of a first number of switches of the second type are connected to each other and to the second ends of the switches of the first type; The first ends of the second number of second type switches are connected to each other and to the external input power source; The first number of second-type switches, the second number of second-type switches, and a third number of charging guns are connected to form a third number of charging circuits; 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 to control the first type switch and the corresponding second type switch according to the received charging instruction, turn on the corresponding charging circuit, and provide charging power for the corresponding charging gun.

3. The power distribution unit according to claim 2, characterized in that: There are multiple switches of the first type; a first end of each of the switches of the first type is connected to the positive output ends of multiple external input power supplies in a one-to-one correspondence, and a second end is connected to the first end of the first number of switches of the second type; The negative output terminals of the plurality of external input power sources are respectively connected to the first terminals of the second number of second-type switches.

4. The power distribution unit according to any one of claims 2 to 3, characterized in that: The power distribution unit further includes: at least one switch; 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.

5. The power distribution unit according to claim 4, characterized in that: The at least one switch includes a first type of switch, and / or a second type of switch.

6. The power distribution unit according to claim 5, characterized in that: The power distribution unit further includes: a first copper bar and a second copper bar; The first copper busbar is respectively connected to the second ends of the plurality of first-type switches and the first ends of the first number of second-type switches; The second copper busbar is respectively connected to the negative output terminals of the plurality of external input power supplies and the first terminals of the second number of second-type switches.

7. A charging pile, characterized in that: The charging pile comprises: At least one voltage conversion module, at least one charging gun and a power distribution unit as claimed in any one of claims 1 to 6; The input end of the voltage conversion module is connected to the alternating current, and is used to rectify the alternating current and output it; The power distribution unit is respectively connected to the output ends of the voltage conversion modules with the same number of first-type switches in the power distribution unit; The power distribution unit is connected to at least one charging gun and is used to provide charging power to the corresponding charging gun according to the received charging instruction.

8. The charging pile according to claim 7, characterized in that: The charging pile also includes: Multiple power distribution units; The multiple power distribution units are respectively connected to at least one voltage conversion module; wherein the power distribution units are respectively connected to output ends of voltage conversion modules having the same number of first-type switches in the power distribution unit.

9. The charging pile according to claim 8, characterized in that: The charging pile also includes: A control module, connected to the at least one charging gun, respectively, and configured to obtain, through each charging gun, a desired charging power for a device to be charged connected to each charging gun; The control module is connected to the multiple power distribution units respectively, and is used to output corresponding charging instructions 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 with the expected charging power.

10. The charging pile according to claim 9, characterized in that: The control module is connected to the multiple power distribution units respectively, and is used to output corresponding charging instructions to the power distribution unit connected to the charging gun according to the expected charging power, and turn on the corresponding charging circuit; The control module is also respectively connected to the at least one voltage conversion module, and is used to output corresponding charging power instructions to the voltage conversion module connected to the power distribution unit according to the expected charging power, and adjust the output power of the voltage conversion module, so as to charge the device to be charged with the expected charging power.

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