Charging pile and charging station

Abstract

The application discloses a charging pile and a charging station, and belongs to the technical field of charging. The charging pile comprises a first switching device, one end of the first switching device being used for being connected with a transformer; a direct-current charging module, the direct-current charging module comprising an AC-DC conversion module and one or more direct-current charging guns, one end of the AC-DC conversion module being connected with the other end of the first switching device, and the other end of the AC-DC conversion module being connected with the one or more direct-current charging guns; and an alternating-current charging module, the alternating-current charging module being connected with the other end of the first switching device, the alternating-current charging module comprising one or more alternating-current charging guns, and each alternating-current charging gun being provided with a second switching device between the alternating-current charging gun and the first switching device. The charging pile is internally coupled with the direct-current charging gun and the alternating-current charging gun, power provided for the direct-current charging module is limited, a corresponding number of alternating-current charging guns with small power are provided, more charging interfaces are provided for the charging pile, and the charging demand of a user is met.

Description

Charging piles and charging stations Technical Field

[0001] This application belongs to the field of charging technology, and in particular relates to a charging pile and charging station. Background Technology

[0002] In recent years, the electric vehicle industry has developed rapidly, and the construction of electric vehicle charging facilities such as charging piles and charging stations has also been actively promoted.

[0003] Currently, car charging stations are mainly divided into two types: AC charging stations and DC charging stations. Among them, AC charging stations have lower power, while DC charging stations generally have higher power. DC charging stations can reduce charging time, and car owners use DC charging stations more frequently.

[0004] Due to the limited capacity of the transformer in the charging station and the impact of DC charging piles on the power grid during operation, the number of charging piles in the charging station is insufficient to meet the charging needs of users. At the same time, the utilization efficiency of AC charging piles is low, resulting in poor economic efficiency of the charging station. Summary of the Invention

[0005] This application aims to address at least one of the technical problems existing in the prior art. To this end, this application proposes a charging pile and charging station that can solve the problem of insufficient charging pile quantity due to insufficient transformer substation capacity, providing more charging interfaces to meet users' charging needs.

[0006] Firstly, this application provides a charging pile, comprising:

[0007] A first switching device, one end of which is used to connect to a transformer;

[0008] A DC charging module, comprising an AC-DC converter module and one or more DC charging guns, wherein one end of the AC-DC converter module is connected to the other end of the first switching device, and the other end of the AC-DC converter module is connected to the one or more DC charging guns;

[0009] An AC charging module, comprising one or more AC charging guns, the AC charging module being connected to the other end of the first switching device, and a second switching device being provided between each of the AC charging guns and the first switching device.

[0010] According to the charging pile of this application, DC charging guns and AC charging guns are coupled inside the charging pile. By limiting the power supplied to the DC charging module, a corresponding number of AC charging guns with smaller power are provided, providing more charging interfaces for the charging pile. This can solve the problem of insufficient charging pile quantity caused by insufficient transformer capacity and meet the charging needs of users.

[0011] According to one embodiment of this application, it also includes:

[0012] The control system is electrically connected to the first switching device, the DC charging module, and the AC charging module. The control system is used to control the opening and closing state of the second switching device based on the target power allocated by the charging pile from the transformer, and to allocate output power to the DC charging module and the AC charging module.

[0013] According to one embodiment of this application, when the target power is greater than or equal to the maximum overload power of the charging pile, the control system is used to control all the second switching devices in the AC charging module to close, the DC charging module is used to output the DC full power of the charging pile, and the AC charging module is used to output the AC full power of the charging pile.

[0014] According to one embodiment of this application, when the target power is less than the maximum overload power of the charging pile but greater than the rated power of the charging pile, the control system is used to control all the second switching devices in the AC charging module to close, and to allocate the target power to the DC charging module and the AC charging module according to the target allocation ratio, wherein the power allocated to the DC charging module is greater than the power allocated to the AC charging module.

[0015] According to one embodiment of this application, the AC charging module includes a plurality of AC charging guns. When the target power is less than the maximum overload power and greater than or equal to the first power, the control system is used to control a portion of the second switching devices in the AC charging module to close. The DC charging module is used to output DC full power according to the charging pile, and the AC charging module is used to output AC full power according to the charging pile. The first power is greater than the rated power.

[0016] According to one embodiment of this application, the first power is determined based on the DC full power and AC full power of the charging pile.

[0017] According to one embodiment of this application, the AC charging module includes a plurality of AC charging guns. When the target power is less than a first power but greater than the rated power, the control system is used to control a portion of the second switching devices in the AC charging module to close, and to distribute the target power to the DC charging module and the AC charging module according to the target allocation ratio, wherein the power allocated to the DC charging module is greater than the power allocated to the AC charging module.

[0018] According to one embodiment of this application, when the target power is equal to the rated power of the charging pile, the control system is used to allocate the target power to the DC charging module and the AC charging module according to the target allocation ratio, wherein the power allocated to the DC charging module is greater than the power allocated to the AC charging module.

[0019] According to one embodiment of this application, a third switching device is provided between the AC-DC conversion module and the one or more DC charging guns.

[0020] Secondly, this application provides a charging station, which includes:

[0021] A transformer for connecting to an AC power grid;

[0022] At least one charging pile as described in the first aspect above, the charging pile being connected to the transformer;

[0023] A station control system is connected to the charging pile and is used to distribute the power of the transformer to the charging pile.

[0024] According to the charging station of this application, DC charging guns and AC charging guns are coupled inside the charging pile. By limiting the power supplied to the DC charging module, a corresponding number of AC charging guns with smaller power are provided, providing more charging interfaces for the charging pile. This can solve the problem of insufficient charging pile quantity caused by insufficient transformer capacity and meet the charging needs of users.

[0025] According to one embodiment of this application, the station control system is used to determine the number of online charging piles and to distribute the power of the transformer evenly among the online charging piles.

[0026] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 is a schematic diagram of the structure of the charging pile provided in an embodiment of this application;

[0029] Figure 2 is a structural schematic diagram of the charging station provided in an embodiment of this application;

[0030] Figure 3 is a schematic diagram of the power allocation process of the station control system of the charging station provided in the embodiment of this application;

[0031] Figure 4 is a schematic diagram of the power allocation process of the control system of the charging pile provided in the embodiment of this application.

[0032] Figure label:

[0033] Charging station 100, AC charging gun 110, DC charging gun 120, AC-DC converter module 130

[0034] Transformer 210, station control system 220. Detailed Implementation

[0035] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0036] The charging pile 100 and charging station according to embodiments of this application are described below with reference to Figures 1-4.

[0037] As shown in Figure 1, the charging pile 100 of this application embodiment includes a first switching device, a DC charging module and an AC charging module.

[0038] The first switching device is used to connect to the transformer 210 and to control the conduction and disconnection of the circuit connection between the transformer 210 and the charging pile 100.

[0039] In actual implementation, the first switching device can be a circuit breaker. The circuit breaker can protect the charging pile 100 when overload, short circuit or undervoltage protection occurs. The first switching device disconnects the transformer 210 and the charging pile 100.

[0040] The DC charging module includes an AC-DC conversion module 130 and one or more DC charging guns 120. One end of the AC-DC conversion module 130 is connected to the other end of the first switching device, and the other end of the AC-DC conversion module 130 is connected to one or more DC charging guns 120.

[0041] In the DC charging module, the AC power supplied by the transformer 210 is converted into DC power by the AC-DC conversion module 130 and supplied to the DC charging gun 120 for the user to use for charging.

[0042] The AC charging module is connected to the other end of the first switching device. The AC charging module includes one or more AC charging guns 110, and a second switching device is provided between each AC charging gun 110 and the first switching device.

[0043] In actual implementation, the second switching device can be a contactor, which is a power switching device. Each AC charging gun 110 is provided with a second switching device between itself and the first switching device. The AC charging gun 110 can be controlled to output power by controlling the opening and closing state of the second switching device.

[0044] In this embodiment, the charging pile 100 is coupled with a DC charging gun 120 and an AC charging gun 110. The power output of the transformer 210 is partially allocated to the DC charging module and partially allocated to the AC charging module. By limiting the power supplied to the DC charging module, a corresponding number of AC charging guns 110 with smaller power are provided, thus providing more charging interfaces for the charging pile 100.

[0045] For example, as shown in Figure 1, one end of the first switching device QF1 is used to connect to the transformer 210, and the other end is connected to the AC charging module and the DC charging module respectively. Two AC charging guns 110 can be set in the AC charging module, and the circuits of the two AC charging guns 110 are controlled by the second switching devices K1 and K2 respectively.

[0046] In this embodiment, the AC-DC conversion module 130 of the DC charging module is connected to the first switching device QF1. The AC-DC conversion module 130 converts AC power into DC power and supplies it to two DC charging guns 120. The charging pile 100 can provide two AC charging guns 110 and two DC charging guns 120, for a total of four charging interfaces.

[0047] Understandably, the charging pile 100 can provide a high-power DC charging mode or a low-power AC charging mode. The charging station can deploy more charging piles 100 that couple DC charging guns 120 and AC charging guns 110, which can solve the problem of insufficient charging piles 100 due to insufficient transformer capacity, provide more charging interfaces, and meet the charging needs of users.

[0048] In this embodiment, the charging pile 100 that couples the DC charging gun 120 and the AC charging gun 110, and the use of the low-power AC charging gun 110, can also reduce the impact on the power grid caused by the frequent connection and disconnection of high-power DC charging, and reduce the power fluctuation of the charging station.

[0049] In practice, the DC charging gun 120 and the AC charging gun 110 can share the AC module and housing of a charging pile 100, which helps to reduce the cost of the charging pile 100.

[0050] According to the charging pile 100 provided in the embodiments of this application, DC charging gun 120 and AC charging gun 110 are coupled within the charging pile 100. By limiting the power supplied to the DC charging module, a corresponding number of AC charging guns 110 with smaller power are provided, providing more charging interfaces for the charging pile 100. This can solve the problem of insufficient charging piles 100 due to insufficient transformer capacity and meet the charging needs of users.

[0051] In some embodiments, a third switching device is provided between the AC-DC conversion module 130 and one or more DC charging guns 120. The third switching device is used to control the conduction and disconnection of the circuit connection between the AC-DC conversion module 130 and the DC charging gun 120.

[0052] In this embodiment, the third switching device can be a circuit breaker.

[0053] In this embodiment, the third switching device QF2 is located between the AC-DC conversion module 130 and the DC charging gun 120. When the AC-DC conversion module 130 fails, the third switching device QF2 can be disconnected, which will not affect the use of the AC charging gun 110 in the AC charging module. This solves the common problem that damage to the AC / DC power module causes the entire charging pile 100 to become unusable, and effectively improves the service life of the charging pile 100.

[0054] In some embodiments, the charging pile 100 may also include a control system.

[0055] The control system is electrically connected to the first switching device, the DC charging module, and the AC charging module. The control system is used to control the opening and closing state of the second switching device based on the target power allocated from the transformer 210 to the charging pile 100, and to allocate output power to the DC charging module and the AC charging module.

[0056] In this embodiment, the control system controls a second switching device to close, and the AC charging gun 110 corresponding to the second switching device can output power; controls a second switching device to open, and the AC charging gun 110 corresponding to the second switching device cannot output power.

[0057] It is understandable that the target power allocated by the transformer 210 of the charging station to the charging pile 100 is limited. By controlling the opening and closing state of the second switching device and the power distribution between the DC charging module and the AC charging module through the control system, the power provided to the DC charging module is limited, so that a corresponding number of AC charging guns 110 with smaller power can be used. One charging pile 100 can provide more charging interfaces at the same time, effectively solving the problem of insufficient number of charging piles 100 or insufficient number of charging interfaces during peak charging periods of the charging station.

[0058] The following section provides a detailed description of how the control system controls the opening and closing states of the second switching device and allocates the output power of the DC charging module and the AC charging module.

[0059] In some embodiments, when the target power is greater than or equal to the maximum overload power of the charging pile 100, the control system is used to control all the second switching devices in the AC charging module to close, the DC charging module is used to output the DC full power of the charging pile 100, and the AC charging module is used to output the AC full power of the charging pile 100.

[0060] The maximum overload power of the charging pile 100 includes the rated power and the maximum overload power of the charging pile 100.

[0061] For example, the rated power of charging pile 100 is P, the maximum overload power is 0.4P, and the maximum overload power of charging pile 100 is 1.4P.

[0062] In this embodiment, the target power allocated by the transformer 210 to the charging pile 100 is greater than or equal to the maximum overload power of the charging pile 100. The charging pile 100 itself has sufficient allocated power, and the DC charging module and AC charging module can output at full power.

[0063] For example, the target power allocated by transformer 210 to charging pile 100 is P2.

[0064] When P2≥1.4P, the control system controls all the second switching devices in the AC charging module to close. The DC charging module is used to output the full DC power of the charging pile 100, and the AC charging module is used to output the full AC power of the charging pile 100. The power allocated to the DC charging module is P, and the power allocated to the AC charging module is 0.2P.

[0065] It is understandable that the power allocated to the DC charging module is P, which is then further distributed based on the number of DC charging guns 120 used in the DC charging module.

[0066] For example, a DC charging module includes two DC charging guns 120, and both DC charging guns 120 are in use, with each DC charging gun 120 receiving a power of 0.5P; or only one DC charging gun 120 is in use, with that DC charging gun 120 receiving a power of P.

[0067] The power allocated to the AC charging module is 0.2P. The control system controls all the second switching devices in the AC charging module to close, and then distributes the power according to the number of AC charging guns 110 in the AC charging module.

[0068] For example, the AC charging module includes two AC charging guns 110, and both AC charging guns 110 are in use, with each AC charging gun 110 allocated a power of 0.1P.

[0069] In some embodiments, when the target power is less than the maximum overload power of the charging pile 100 but greater than the rated power of the charging pile 100, the control system is used to control all the second switching devices in the AC charging module to close, and to allocate the target power to the DC charging module and the AC charging module according to the target allocation ratio, wherein the power allocated to the DC charging module is greater than the power allocated to the AC charging module.

[0070] It should be noted that when the control system closes all the second switching devices in the AC charging module, it indicates that all the AC charging guns 110 in the AC charging module are in an unhung state, that is, each AC charging gun 110 is connected to the vehicle or equipment that needs to be charged.

[0071] In this embodiment, when the target power is less than the maximum overload power of the charging pile 100 but greater than the rated power of the charging pile 100, the control system can control all the second switching devices in the AC charging module to close, and the charging pile 100 provides a corresponding number of AC charging guns 110 with smaller power to meet the user's charging needs.

[0072] The target allocation ratio can be a pre-set allocation ratio. For example, if the target allocation ratio between the DC charging module and the AC charging module is 8:2, 80% of the target power can be allocated to the DC charging module and 20% of the target power can be allocated to the AC charging module.

[0073] For example, if the target power allocation ratio between the DC charging module and the AC charging module is 3:2, 60% of the target power can be allocated to the DC charging module and 40% of the target power can be allocated to the AC charging module.

[0074] It is understandable that the control system controls all the second switching devices in the AC charging module to close, and the power allocated to the AC charging module is distributed according to the number of AC charging guns 110 in the AC charging module, and the power allocated to the DC charging module is further distributed according to the number of DC charging guns 120 used in the DC charging module.

[0075] In some embodiments, the AC charging module includes a plurality of AC charging guns 110. When the target power is less than the maximum overload power and greater than or equal to the first power, the control system is used to control the closing of a portion of the second switching devices in the AC charging module. The DC charging module is used to output DC full power according to the charging pile 100, and the AC charging module is used to output AC full power according to the charging pile 100.

[0076] The first power is greater than the rated power.

[0077] When the target power is less than the maximum overload power and greater than or equal to the first power, the control system can control some of the second switching devices in the AC charging module to close. That is, some of the multiple AC charging guns 110 in the AC charging module are in a suspended non-charging state, and some are in an unsuspended charging state (the AC charging gun 110 corresponding to the closure of the second switching device).

[0078] In this embodiment, the first power is greater than the rated power, the target power is less than the maximum overload power and greater than or equal to the first power, and the DC charging module and the AC charging module can output at full power.

[0079] In some embodiments, the first power is determined based on the DC full power and AC full power of the charging pile 100.

[0080] In actual implementation, the first power can be equal to the sum of the full DC power and full AC power of the charging pile 100, so that when the target power is greater than or equal to the first power, the DC charging module and the AC charging module can output full power.

[0081] For example, the full power of DC is P, the full power of AC is 0.2P, and the first power is 1.2P.

[0082] The rated power of the charging pile 100 is P, the maximum overload power of the charging pile 100 is 1.4P, and the target power is P2.

[0083] When 1.4>P2≥1.2P, the control system controls all the second switching devices in the AC charging module to close. The DC charging module is used to output the full DC power of the charging pile 100, and the AC charging module is used to output the full AC power of the charging pile 100. The power allocated to the DC charging module is P, and the power allocated to the AC charging module is 0.2P.

[0084] The AC charging module includes AC charging gun 1 and AC charging gun 2.

[0085] AC charging gun 1 is in the open state, AC charging gun 2 is in the suspended state, the second switching device K1 corresponding to AC charging gun 1 is closed, the power allocated by the DC charging module is P, and the power allocated by AC charging gun 1 is 0.2P.

[0086] AC charging gun 2 is in the open state, AC charging gun 1 is in the suspended state, the second switching device K2 corresponding to AC charging gun 2 is closed, the power allocated by the DC charging module is P, and the power allocated by AC charging gun 2 is 0.2P.

[0087] In some embodiments, the AC charging module includes a plurality of AC charging guns 110. When the target power is less than the first power but greater than the rated power, the control system controls a portion of the second switching devices in the AC charging module to close, and distributes the target power to the DC charging module and the AC charging module according to the target allocation ratio. The power allocated to the DC charging module is greater than the power allocated to the AC charging module.

[0088] In this embodiment, the target power is less than the first power but greater than the rated power. The target power allocated by the transformer 210 to the charging pile 100 can be supplied to the AC charging module and the DC charging module. The second switching device in part of the AC charging module is disconnected, and the corresponding part of the AC charging gun 110 is in a suspended state. The DC charging gun 120 and part of the AC charging gun 110 of the charging pile 100 can be used.

[0089] The target allocation ratio can be a pre-set allocation ratio. For example, if the target allocation ratio between the DC charging module and the AC charging module is 8:2, 80% of the target power can be allocated to the DC charging module and 20% of the target power can be allocated to the AC charging module.

[0090] In some embodiments, when the target power is equal to the rated power of the charging pile 100, the control system is used to allocate the target power to the DC charging module and the AC charging module according to the target allocation ratio, wherein the power allocated to the DC charging module is greater than the power allocated to the AC charging module.

[0091] In some embodiments, the control system is used to control the closing of all the second switching devices in the AC charging module and to distribute the target power to the DC charging module and the AC charging module according to the target allocation ratio.

[0092] In some embodiments, the control system is used to control the closing of a portion of the second switching device in the AC charging module and to distribute the target power to the DC charging module and the AC charging module according to the target allocation ratio.

[0093] In this embodiment, the target power is equal to the rated power of the charging pile 100. The target power allocated by the transformer 210 to the charging pile 100 can be supplied to the AC charging module and the DC charging module. The power supplied to the DC charging module is limited, and a corresponding number of AC charging guns 110 with smaller power are provided. More charging interfaces are provided to meet the user's charging needs.

[0094] This application also provides a charging station.

[0095] As shown in Figure 2, the charging station includes a transformer 210, at least one charging pile 100 as described above, and a station control system 220.

[0096] In this embodiment, transformer 210 is used to connect to AC power grid, charging pile 100 is connected to transformer 210, station control system 220 is connected to charging pile 100, and station control system 220 is used to distribute the power of transformer 210 to charging pile 100.

[0097] The charging pile 100 includes a first switching device, a DC charging module and an AC charging module, and the first switching device is connected to the transformer 210.

[0098] The DC charging module includes an AC-DC conversion module 130 and one or more DC charging guns 120. One end of the AC-DC conversion module 130 is connected to the other end of the first switching device, and the other end of the AC-DC conversion module 130 is connected to one or more DC charging guns 120.

[0099] The AC charging module is connected to the other end of the first switching device. The AC charging module includes one or more AC charging guns 110, and a second switching device is provided between each AC charging gun 110 and the first switching device.

[0100] In this embodiment, the charging pile 100 is coupled with a DC charging gun 120 and an AC charging gun 110. The power output of the transformer 210 is partially allocated to the DC charging module and partially allocated to the AC charging module. By limiting the power supplied to the DC charging module, a corresponding number of AC charging guns 110 with smaller power are provided, thus providing more charging interfaces for the charging pile 100.

[0101] According to the charging station provided in the embodiments of this application, the charging pile 100 is internally coupled with a DC charging gun 120 and an AC charging gun 110. By limiting the power supplied to the DC charging module, a corresponding number of AC charging guns 110 with smaller power are provided, providing more charging interfaces for the charging pile 100. This can solve the problem of insufficient charging piles 100 due to insufficient transformer capacity and meet the charging needs of users.

[0102] In some embodiments, the station control system 220 is used to determine the number of online charging piles 100 and to distribute the power of the transformer 210 evenly among the online charging piles 100.

[0103] In this embodiment, the station control system 220 distributes the power of the transformer 210 evenly to the online charging piles 100 according to the number of online charging piles 100, with each charging pile 100 receiving the same target power.

[0104] Among them, the online charging pile 100 refers to the charging pile 100 that has an AC charging gun 110 or a DC charging gun 120 in use.

[0105] The following is a specific example.

[0106] As shown in Figure 3, the station control system 220 starts normally and performs a self-test.

[0107] The charging piles 100 in the charging station are powered on normally. The total transformer power provided by the transformer 210 is P1. The station control system 220 distributes the power equally to all charging piles 100 in the charging station.

[0108] The station control system 220 detects the number N of online charging piles 100 and distributes the transformer power P1 equally to the online charging piles 100. The target power available to each charging pile 100 is P2 = P1 / N.

[0109] As shown in Figure 4, taking the rated power of charging pile 100 as P, the maximum overload power as 1.4P, and the first power as 1.2P as an example, the power distribution within charging pile 100 is introduced.

[0110] The DC charging module of the charging pile 100 includes a DC gun, and the AC charging module includes AC gun 1 and AC gun 2, which correspond to contactors K1 and K2 respectively.

[0111] In some embodiments, P2 ≥ 1.4P.

[0112] The control system of the charging pile 100 can control the closing of all contactors, and both the DC charging module and the AC charging module can output at full power. That is, both the DC gun and the AC gun of the charging pile 100 can output at full power. The output power of the DC gun is P, and the output power of each AC gun is 0.2P.

[0113] In some embodiments, 1.4P > P2 ≥ 1.2P.

[0114] When all AC guns are in the unsuspended state and all contactors are closed, the power is allocated according to the target allocation ratio. The DC gun is allocated 80% of P2, the two AC guns are allocated 20% of P2, and AC gun 1 and AC gun 2 are each allocated 10% of P2.

[0115] AC gun 1 is in the open state, contactor K1 is closed, AC gun 2 is in the open state, the power allocated to DC gun is P, the power allocated to AC gun 1 is 20%P, and both DC gun and AC gun 1 can output full power.

[0116] AC gun 1 is in the suspended state, AC gun 2 is in the open state, contactor K2 is closed, the power allocated to DC gun is P, and the power allocated to AC gun 2 is 20%P. Both DC gun and AC gun 2 can output full power.

[0117] In some embodiments, 1.2P > P2 > P.

[0118] When all AC guns are in the unsuspended state and all contactors are closed, the power is allocated according to the target allocation ratio. The DC gun is allocated 80% of P2, the AC gun is allocated 20% of P2, and AC gun 1 and AC gun 2 are each allocated 10% of P2.

[0119] AC gun 1 is in the open state, contactor K1 is closed, AC gun 2 is in the suspended state, the power allocated to DC gun is 80% P2, and the power allocated to AC gun 1 is 20% P2.

[0120] AC gun 1 is in the suspended state, AC gun 2 is in the open state, contactor K2 is closed, the power allocated to DC gun is 80% P2, and the power allocated to AC gun 2 is 20% P2.

[0121] Understandably, 1.2P > P2 > P, meaning that when only one of the two AC guns is not switched on, neither the AC nor the DC gun will output full power.

[0122] In some embodiments, P2 = P.

[0123] All AC guns are in the open state, all contactors are closed, the DC guns are allocated 80% P of power, and the AC guns are allocated 20% P of power.

[0124] AC gun 1 is in the open state, contactor K1 is closed, AC gun 2 is in the suspended state, the power allocated to DC gun is 80%P, and the power allocated to AC gun 1 is 20%P.

[0125] AC gun 1 is in the suspended state, AC gun 2 is in the open state, contactor K2 is closed, the power allocated to DC gun is 80%P, and the power allocated to AC gun 2 is 20%P.

[0126] The charging pile 100 is internally coupled with DC charging gun 120 and AC charging gun 110. By limiting the power supplied to the DC charging module, a corresponding number of AC charging guns 110 with smaller power are provided, providing more charging interfaces for the charging pile 100. This can solve the problem of insufficient charging piles 100 due to insufficient transformer capacity and meet the charging needs of users.

[0127] The target power allocated by the transformer 210 of the charging station to the charging pile 100 is limited. The control system controls the opening and closing state of the contactor and the power distribution between the DC charging module and the AC charging module to limit the power provided to the DC charging module, so as to ensure that a corresponding number of AC charging guns 110 with smaller power can be used. One charging pile 100 can provide more charging interfaces at the same time, effectively solving the problem of insufficient number of charging piles 100 or insufficient number of charging interfaces during peak charging periods of the charging station.

[0128] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0129] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0130] In the description of this application, "multiple" means two or more.

[0131] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0132] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0133] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0134] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A charging pile, characterized in that, include: A first switching device, one end of which is used to connect to a transformer; A DC charging module, comprising an AC-DC converter module and one or more DC charging guns, wherein one end of the AC-DC converter module is connected to the other end of the first switching device, and the other end of the AC-DC converter module is connected to the one or more DC charging guns; an AC charging module, comprising one or more AC charging guns, wherein the AC charging module is connected to the other end of the first switching device, and a second switching device is provided between each AC charging gun and the first switching device; and a control system, electrically connected to the first switching device, the DC charging module, and the AC charging module, wherein the control system is used to control the opening and closing state of the second switching device based on the target power allocated by the charging pile from the transformer, and to allocate output power to the DC charging module and the AC charging module; When the target power is less than the maximum overload power of the charging pile but greater than the rated power of the charging pile, the control system controls all the second switching devices in the AC charging module to close, and distributes the target power to the DC charging module and the AC charging module according to the target allocation ratio. The power allocated to the DC charging module is greater than the power allocated to the AC charging module. The AC charging module includes multiple AC charging guns. When the target power is less than the maximum overload power but greater than or equal to the first power, the control system controls some of the second switching devices in the AC charging module to close. The DC charging module outputs at the full DC power of the charging pile, and the AC charging module outputs at the full AC power of the charging pile. The first power is greater than the rated power.

2. The charging pile according to claim 1, characterized in that, When the target power is greater than or equal to the maximum overload power of the charging pile, the control system is used to control all the second switching devices in the AC charging module to close, the DC charging module is used to output the DC full power of the charging pile, and the AC charging module is used to output the AC full power of the charging pile.

3. The charging pile according to claim 1, characterized in that, The first power is determined based on the full DC power and full AC power of the charging pile.

4. The charging pile according to claim 1, characterized in that, The AC charging module includes multiple AC charging guns. When the target power is less than the first power but greater than the rated power, the control system controls a portion of the second switching devices in the AC charging module to close, and distributes the target power to the DC charging module and the AC charging module according to the target allocation ratio. The power allocated to the DC charging module is greater than the power allocated to the AC charging module.

5. The charging pile according to claim 1, characterized in that, When the target power is equal to the rated power of the charging pile, the control system is used to allocate the target power to the DC charging module and the AC charging module according to the target allocation ratio, wherein the power allocated to the DC charging module is greater than the power allocated to the AC charging module.

6. The charging pile according to any one of claims 1-5, characterized in that, A third switching device is provided between the AC-DC conversion module and the one or more DC charging guns.

7. A charging station, characterized in that, include: A transformer for connection to an AC power grid; at least one charging pile as described in any one of claims 1-6, the charging pile being connected to the transformer; A station control system is connected to the charging pile and is used to distribute the power of the transformer to the charging pile.

8. The charging station according to claim 7, characterized in that, The station control system is used to distribute the power of the transformer evenly to the online charging piles based on the number of online charging piles.

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