Power supply circuit, power supply system and charging pile

Abstract

The utility model provides a power supply circuit, a power supply system and a charging pile. The power supply circuit comprises N power modules and N power output ends, wherein N is greater than or equal to 4; the power output ends are in one-to-one correspondence with the power modules, and the power output ends are electrically connected with the corresponding power modules through the electric connecting pieces; wherein one electric connecting piece is connected with at least one other electric connecting piece through the switch element; the number of the switching elements is M, and the # imgabs 0 # imgabs 1 # switching elements are configured to be switched on or off through the switching elements. The control module is used for controlling the power modules to which the two electric connecting pieces connected with the control module belong to output electric power to the same power output end or controlling the power modules to which the two electric connecting pieces connected with the control module belong to respectively output electric power to respective corresponding power output ends; the power output end is configured to output electric power to electric equipment. According to the power supply circuit, the number of the switch elements is limited to be # imgabs2, so that the performance and the cost of the power supply circuit provided by the embodiment of the utility model are more balanced.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a power supply circuit, a power supply system and a charging pile. Background Art

[0002] The power supply circuit is usually a circuit that outputs the power of the power module to the load through a specific circuit connection method. In addition, the power supply circuit usually has multiple power output terminals to output power to multiple loads. On this basis, in order to achieve the adjustable power output of the power output, the power output terminals in the power supply circuit are usually connected through switching elements to achieve the coordination and allocation of power between the power output terminals by controlling the on or off of the switching elements.

[0003] Regarding the specific methods of connecting power output terminals through switching elements, there are currently two main types: ring connection and matrix connection.

[0004] Among them, regarding the ring connection type, for example: the first power output end is connected to the second power output end through a switch element, the second power output end is connected to the third power output end through a switch element, the third power output end is connected to the fourth power output end through a switch element, and the fourth power output end is connected to the first power output end through a switch element. Such a connection method, due to its relatively simple connection method, leads to a low adjustable space for the power output of the power output end. That is, the performance of the power supply circuit of the ring connection type is not good enough.

[0005] Regarding the matrix connection type, each power output is connected to all other power output terminals via a switch element. This connection method is relatively complex, which leads to a high cost of the power supply circuit.

[0006] In summary, the current power supply circuit is not balanced enough between performance and cost. Utility Model Content

[0007] The purpose of this application is to provide a power supply circuit, a power supply system and a charging pile, which can make the power supply circuit more balanced between performance and cost.

[0008] In a first aspect, the present application provides a power supply circuit, comprising N power modules and N power output terminals; wherein N≥4; the power output terminals correspond to the power modules one by one, and the power output terminals are electrically connected to the corresponding power modules through electrical connectors; wherein one of the electrical connectors is connected to at least one other electrical connector through a switching element; wherein the number of the switching elements is M, The switch element is configured to control the power modules belonging to the two electrical connectors connected to it to output electrical power to the same power output terminal or control the power modules belonging to the two electrical connectors connected to it to output electrical power to their respective corresponding power output terminals through its on or off switching; the power output terminal is configured to output electrical power to an electrical device.

[0009] The above power supply circuit, the electrical connectors are combined in pairs and connected through switch elements, and the combination method has a total of If the electrical connectors are connected to each other through switch elements according to all possible combinations, this connection method is also a matrix connection method. However, this connection method is relatively expensive. If a ring connection method is used, the number of switch elements required is M=N. Therefore, by limiting the number of switch elements to The power supply circuit provided by the present application has lower cost compared with the traditional ring connection scheme; by limiting the number of switch elements to M>N, the power supply circuit provided by the present application has a larger adjustable space for the power output end compared with the traditional matrix connection scheme, and thus has better performance. In other words, the power supply circuit provided by the present application is more balanced between performance and cost.

[0010] In combination with the first aspect, optionally, N=6.

[0011] The above power supply circuit, since the six-way power supply circuit with 6 power output terminals is a more common power supply circuit, by determining the number of power modules and power output terminals to 6, the more common six-way power supply circuit is made more balanced between performance and cost.

[0012] In combination with the first aspect, optionally, each of the power modules includes at least one power unit; the total number of the power units is not equal to an integer multiple of N; wherein at least two of the power units belonging to the same power module are connected together to the electrical connector corresponding to the power module.

[0013] The above power supply circuit, by limiting the total number of power units to be not equal to an integer multiple of N, makes the number of power units contained in each power module unequal. As a result, the power output by each power output end is also unequal. Furthermore, in the process of coordinating the power output of each power module through the switch element, more powers of different sizes can be combined. Ultimately, the power supply circuit provided by the present application can meet more different power supply requirements.

[0014] In combination with the first aspect, optionally, the total number of the power units is 16.

[0015] In the above power supply circuit, the total number of power units in the six-way power supply circuit is usually 16. This makes the power supply circuit with 16 power units, which is more commonly used in the six-way power supply circuit, more balanced between performance and cost.

[0016] In combination with the first aspect, optionally, the electrical connector includes a first electrical connector, a second electrical connector, a third electrical connector, a fourth electrical connector, a fifth electrical connector, and a sixth electrical connector corresponding to and electrically connected to the six power modules one by one; the switch element includes a first switch element, a second switch element, a third switch element, a fourth switch element, a fifth switch element, a sixth switch element, a seventh switch element, an eighth switch element, and a ninth switch element; the first electrical connector is connected to the second electrical connector through the first switch element; the first electrical connector is connected to the third electrical connector through the second switch element ; The first electrical connector is connected to the fourth electrical connector through the third switch element; the second electrical connector is connected to the third electrical connector through the fourth switch element; the second electrical connector is connected to the fifth electrical connector through the fifth switch element; the third electrical connector is connected to the sixth electrical connector through the sixth switch element; the fourth electrical connector is connected to the fifth electrical connector through the seventh switch element; the fourth electrical connector is connected to the sixth electrical connector through the eighth switch element; the fifth electrical connector is connected to the sixth electrical connector through the ninth switch element.

[0017] The above-mentioned power supply circuit, through the connection method described in the present application, realizes that each power output end has a larger power adjustable space, and further saves the cost of the power supply circuit compared to the connection method using 10, 11 or more switching elements.

[0018] In combination with the first aspect, optionally, two of the power modules respectively include two of the power units; four of the power modules respectively include three of the power units; and output powers of all of the power units are equal.

[0019] The above-mentioned power supply circuit determines the ratio between the power that can be output by two of the power modules and the power that can be output by the remaining four power modules as 3:2. On the basis of being able to basically meet different power supply requirements during the power supply process, it reduces the complexity of integrating the power units into power modules, thereby further reducing the cost of the power supply circuit.

[0020] In combination with the first aspect, optionally, the switching element includes a contactor.

[0021] In the above power supply circuit, since the contactor has good conductivity and high temperature ablation resistance, the working stability of the power supply circuit provided by the present application is improved by using the contactor as a switching element.

[0022] In combination with the first aspect, optionally, the power supply circuit is used to charge an electric vehicle.

[0023] The above-mentioned power supply circuit is currently used more frequently in the field of electric vehicle charging and requires a higher cost-effectiveness. Therefore, by applying the power supply circuit provided by the present application to the field of electric vehicle charging, the power supply circuit used to charge the electric vehicle is more balanced between performance and cost, thereby improving the cost-effectiveness of charging the electric vehicle.

[0024] In a second aspect, the present application provides a power supply system, comprising the power supply circuit described in the first aspect.

[0025] The above-mentioned power supply system has the same beneficial effects as the first aspect or any optional implementation of the first aspect, which will not be repeated here.

[0026] In a third aspect, the present application provides a charging pile and a power supply system described in the second aspect.

[0027] The above-mentioned charging pile has the same beneficial effects as the first aspect or any optional implementation manner of the first aspect, which will not be repeated here.

[0028] In summary, the power supply circuit, power supply system and charging pile provided in the present application limit the number of switch elements to Compared with the traditional matrix connection mode, the power supply circuit provided by the present application has a larger adjustable space for the power output of the power output terminal, and thus has better performance. That is, the power supply circuit provided by the present application is more balanced between performance and cost. By limiting the total number of power units to be not equal to an integer multiple of N, the number of power units contained in each power module is not equal. As a result, the power output by each power output terminal is also not equal. Furthermore, in the process of coordinating the power output of each power module through the switching element, more powers of different sizes can be combined. Finally, the power supply circuit provided by the present application can meet more different power supply needs. By using a contactor as a switching element, the working stability of the power supply circuit provided by the present application is improved. In particular, the power supply circuit of the present application is applied to the field of charging electric vehicles, so that the power supply circuit used to charge electric vehicles is more balanced between performance and cost, and the cost performance of charging electric vehicles is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 A first connection diagram of a power supply circuit provided in an embodiment of the present application;

[0031] Figure 2 A second connection diagram of the power supply circuit provided in an embodiment of the present application.

[0032] Icons: 100, power supply circuit; 110, power module; 120, power output terminal; 130, electrical connector; 131, first electrical connector; 132, second electrical connector; 133, third electrical connector; 134, fourth electrical connector; 135, fifth electrical connector; 136, sixth electrical connector; S, switching element; S1, first switching element; S2, second switching element; S3, third switching element; S4, fourth switching element; S5, fifth switching element; S6, sixth switching element; S7, seventh switching element; S8, eighth switching element; S9, ninth switching element. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] Please refer to Figure 1 , Figure 1 1 is a first connection diagram of the power supply circuit 100 provided in the embodiment of the present application. The power supply circuit 100 provided in the embodiment of the present application may include N power modules 110 and N power output terminals 120. Wherein, N≥4. The power output terminals 120 may correspond one-to-one to the power modules 110, and the power output terminals 120 may be electrically connected to the corresponding power modules 110 through electrical connectors 130. One electrical connector 130 may be connected to at least one other electrical connector 130 through a switch element S. Wherein, the number of switch elements S may be M, The switch element S can be configured to control the power modules 110 to which the two electrical connectors 130 connected thereto belong to output electrical power to the same power output terminal 120 or control the power modules 110 to which the two electrical connectors 130 connected thereto belong to output electrical power to their respective corresponding power output terminals 120 by switching on or off. The power output terminal 120 can be configured to output electrical power to an electrical device.

[0040] The power module 110 may be a power supply circuit capable of providing a specific power, etc. The power output terminal 120 may be a socket, a plug, a plug gun, etc. capable of being connected to a load. The connector may be a wire, etc. for connecting the power module 110 and the power output terminal 120. The switch element S may be a contactor, a triode, a circuit breaker, etc., which may realize on-off control of a circuit.

[0041] In the above implementation process, the electrical connectors 130 are combined in pairs and connected through the switch element S. The combination method has a total of If the electrical connectors 130 are connected in pairs through switch elements S according to all possible combinations, this connection method is also a matrix connection method. However, this connection method is relatively expensive. If a ring connection method is adopted, the number of switch elements S required is M=N. Therefore, by limiting the number of switch elements S to The power supply circuit 100 provided in the embodiment of the present application has lower cost compared with the traditional ring connection scheme; by limiting the number of switch elements S to M>N, the power supply circuit 100 provided in the embodiment of the present application has a larger adjustable space for the power output of the power output terminal 120 compared with the traditional matrix connection scheme, and thus has better performance. That is, the power supply circuit 100 provided in the embodiment of the present application is more balanced between performance and cost.

[0042] Please refer to Figure 2 , Figure 2 This is a second connection diagram of the power supply circuit 100 provided in an embodiment of the present application. In some optional implementations, N=6.

[0043] That is to say, the power supply circuit 100 has six power output terminals 120. The six-way power supply circuit with six power output terminals 120 is a relatively common power supply circuit 100.

[0044] In the above implementation process, since the six-way power supply circuit with six power output terminals 120 is a more common power supply circuit 100, by determining the number of power modules 110 and power output terminals 120 to be 6, the more common six-way power supply circuit is more balanced between performance and cost.

[0045] In some optional embodiments, each power module 110 may include at least one power unit. The total number of power units may not be equal to an integer multiple of N. At least two power units belonging to the same power module 110 may be connected to the electrical connector 130 corresponding to the power module 110 together.

[0046] That is, according to the total number of power units and the number of power output terminals 120, it can be determined that the number of power units included in each power module 110 is not equal. The power that can be output by the power unit may be 40 kW.

[0047] In the above implementation process, by limiting the total number of power cells to be not equal to an integer multiple of N, the number of power cells included in each power module 110 is not equal. As a result, the power output by each power output terminal 120 is also not equal. Furthermore, in the process of coordinating the power output of each power module 110 through the switch element S, more powers of different sizes can be combined. Finally, the power supply circuit 100 provided in the present application can meet more different power supply requirements.

[0048] In some optional implementations, the total number of power units may be 16.

[0049] In the currently commonly used six-way power supply circuit, the total number of power units is usually 16. There are many solutions for combining these 16 into 6 power modules 110, and those skilled in the art can determine the specific combination method according to the use requirements.

[0050] In the above implementation process, the total number of power units in the six-way power supply circuit is usually 16. This makes the power supply circuit 100 with 16 power units, which is more commonly used in the six-way power supply circuit, more balanced between performance and cost.

[0051] Please continue to refer to Figure 2In some optional embodiments, the electrical connector 130 may include a first electrical connector 131, a second electrical connector 132, a third electrical connector 133, a fourth electrical connector 134, a fifth electrical connector 135, and a sixth electrical connector 136 that correspond to and are electrically connected to the six power modules 110. The switch element S may include a first switch element S1, a second switch element S2, a third switch element S3, a fourth switch element S4, a fifth switch element S5, a sixth switch element S6, a seventh switch element S7, an eighth switch element S8, and a ninth switch element S9. The first electrical connector 131 may be connected to the second electrical connector 132 through the first switch element S1. The first electrical connector 131 may be connected to the third electrical connector 133 through the second switch element S2. The first electrical connector 131 may be connected to the fourth electrical connector 134 through the third switch element S3. The second electrical connector 132 may be connected to the third electrical connector 133 through the fourth switch element S4. The second electrical connector 132 may be connected to the fifth electrical connector 135 through the fifth switching element S5. The third electrical connector 133 may be connected to the sixth electrical connector 136 through the sixth switching element S6. The fourth electrical connector 134 may be connected to the fifth electrical connector 135 through the seventh switching element S7. The fourth electrical connector 134 may be connected to the sixth electrical connector 136 through the eighth switching element S8. The fifth electrical connector 135 may be connected to the sixth electrical connector 136 through the ninth switching element S9.

[0052] Exemplarily, when the power output end 120 corresponding to the first electrical connector 131, the power output end 120 corresponding to the second electrical connector 132, and the power output end 120 corresponding to the third electrical connector 133 are simultaneously powered, the power output end 120 corresponding to the second electrical connector 132 can call the power module 110 corresponding to the fifth electrical connector 135 through the switch element S between the second electrical connector 132 and the fifth electrical connector 135, and the power module 110 corresponding to the fifth electrical connector 135 can call all idle power modules 110 through the switch element S between the fourth electrical connector 134 and the fifth electrical connector 135, and the switch element S between the fifth electrical connector 135 and the sixth electrical connector 136, thereby greatly improving the utilization rate of the power module 110.

[0053] During the above implementation process, through the connection method described in the embodiment of the present application, it is achieved that each power output end 120 has a larger power adjustable space, and compared with the connection method using 10, 11 or more switching elements S, the cost of the power supply circuit 100 is further saved.

[0054] In some optional embodiments, two power modules 110 may include two power units respectively. Four power modules 110 may include three power units respectively. The output powers of all power units may be equal.

[0055] Taking the output power of a single power unit as 40 kW as an example, in the embodiment of the present application, the output power of each power module 110 is 60 kW, 60 kW, 40 kW, 40 kW, 60 kW, and 60 kW respectively.

[0056] In the above implementation process, by determining the ratio of the power that can be output by two of the power modules 110 to the power that can be output by the remaining four power modules 110 to be 3:2, the complexity of integrating the power units into the power modules 110 is reduced on the basis of being able to basically meet different power supply requirements during the power supply process, thereby further reducing the cost of the power supply circuit 100.

[0057] In some optional embodiments, the switching element S may include a contactor.

[0058] In the above implementation process, since the contactor has good conductivity and high temperature ablation resistance, the contactor is used as the switching element S, thereby improving the working stability of the power supply circuit 100 provided in the embodiment of the present application.

[0059] In some optional implementations, the power supply circuit 100 may be used to charge an electric vehicle.

[0060] Electric vehicles can be electric cars, electric two-wheeled vehicles, etc.

[0061] During the above implementation process, since the power supply circuit 100 is currently used more frequently in the field of electric vehicle charging and requires a higher cost-effectiveness, the power supply circuit 100 provided in the embodiment of the present application is applied to the field of electric vehicle charging, the power supply circuit 100 used to charge the electric vehicle is more balanced between performance and cost, thereby improving the cost-effectiveness of charging the electric vehicle.

[0062] In order to make the solution provided by the present application more clearly understood by those skilled in the art, an exemplary description of the method of using the power supply circuit 100 is made based on the previous embodiments of the present application.

[0063] When the power output end 120 corresponding to the first electrical connector 131, the power output end 120 corresponding to the second electrical connector 132, and the power output end 120 corresponding to the third electrical connector 133 are supplying power at the same time, the power output end 120 corresponding to the second electrical connector 132 itself can output 120kW of power. When the power supply target through the power output end 120 requires 320kW of power supply, it is obviously not enough to use the power output end 120 corresponding to the second electrical connector 132 alone. Therefore, the power module 110 corresponding to the fifth electrical connector 135 can be called through the switch element S between the second electrical connector 132 and the fifth electrical connector 135, and the power module 110 corresponding to the fifth electrical connector 135 can call the power module 110 corresponding to the fourth electrical connector 134 through the switch element S between the fourth electrical connector 134 and the fifth electrical connector 135. The power of the power module 110 corresponding to the fourth electrical connector 134 and the power module 110 corresponding to the fifth electrical connector 135 are 80 kW and 120 kW respectively. Finally, the power output end 120 corresponding to the second electrical connector 132 can output a power of 320 kW.

[0064] Based on the same concept, an embodiment of the present application further provides a power supply system, which may include the power supply circuit 100 described above.

[0065] The above implementation process may be the same as the power supply circuit 100 described above, and will not be described again here.

[0066] Based on the same concept, an embodiment of the present application also provides a charging pile, which may include the power supply system described above.

[0067] The above implementation process may be the same as the power supply system described above, and will not be described in detail here.

[0068] In summary, the power supply circuit 100, the power supply system and the charging pile provided in each embodiment of the present application limit the number of the switching elements S to The power supply circuit 100 provided in the embodiment of the present application is more balanced between performance and cost. By limiting that the total number of power units may not be equal to an integer multiple of N, the number of power units contained in each power module 110 is not equal. As a result, the power output by each power output terminal 120 is also not equal. Furthermore, in the process of coordinating the power output of each power module 110 through the switching element S, more powers of different sizes can be combined. Finally, the power supply circuit 100 provided in the present application can meet more different power supply requirements. By using a contactor as the switching element S, the working stability of the power supply circuit 100 provided in the embodiment of the present application is improved. In particular, the power supply circuit 100 of the present application is applied to the field of charging electric vehicles, so that the power supply circuit 100 used to charge electric vehicles is more balanced between performance and cost, and the cost performance of charging electric vehicles is improved.

[0069] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power supply circuit, characterized in that: It includes N power modules and N power output terminals; wherein N≥4; The power output ends correspond to the power modules one by one, and the power output ends are electrically connected to the corresponding power modules through electrical connectors; One of the electrical connectors is connected to at least one of the other electrical connectors via a switch element; wherein the number of the switch elements is M, The switch element is configured to control the power modules to which the two electrical connectors connected thereto belong to output electrical power to the same power output terminal or to control the power modules to which the two electrical connectors connected thereto belong to output electrical power to their respective corresponding power output terminals respectively by switching on or off; The power output end is configured to output electric power to the electric device.

2. The power supply circuit according to claim 1, characterized in that: in, N＝6。 3. The power supply circuit according to claim 2, characterized in that: Each of the power modules includes at least one power unit; The total number of the power units is not equal to an integer multiple of N; Wherein, at least two power units belonging to the same power module are connected together to the electrical connector corresponding to the power module.

4. The power supply circuit according to claim 3, characterized in that: in, The total number of the power units is 16.

5. The power supply circuit according to claim 4, characterized in that: The electrical connector includes a first electrical connector, a second electrical connector, a third electrical connector, a fourth electrical connector, a fifth electrical connector and a sixth electrical connector which correspond to and are electrically connected to the six power modules one by one; The switch elements include a first switch element, a second switch element, a third switch element, a fourth switch element, a fifth switch element, a sixth switch element, a seventh switch element, an eighth switch element and a ninth switch element; The first electrical connector is connected to the second electrical connector via the first switch element; The first electrical connector is connected to the third electrical connector via the second switch element; The first electrical connector is connected to the fourth electrical connector via the third switch element; The second electrical connection member is connected to the third electrical connection member via the fourth switch element; The second electrical connection member is connected to the fifth electrical connection member via the fifth switch element; The third electrical connection member is connected to the sixth electrical connection member through the sixth switch element; The fourth electrical connection member is connected to the fifth electrical connection member through the seventh switch element; The fourth electrical connection member is connected to the sixth electrical connection member through the eighth switch element; The fifth electrical connection member is connected to the sixth electrical connection member through the ninth switch element.

6. The power supply circuit according to claim 4, characterized in that: The two power modules respectively include two power units; The four power modules respectively include three power units; Wherein, the output powers of all the power units are equal.

7. The power supply circuit according to claim 1, characterized in that: The switching element includes a contactor.

8. The power supply circuit according to any one of claims 1 to 7, characterized in that: The power supply circuit is used for charging an electric vehicle.

9. A power supply system, characterized in that: Includes the power supply circuit as described in any one of 1 to 8.

10. A charging pile, characterized in that: The power supply system as claimed in claim 9.

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