Flexible switching circuit and flexible switching method

Abstract

The invention relates to a flexible switching circuit and a flexible switching method. The flexible switching circuit comprises at least two annular switch groups. Wherein each annular switch group comprises at least two stacked annular switches; each charging module is connected with a charging terminal through an annular switch group, and each annular switch of one annular switch group is connected with different charging terminals and is connected with the same charging module; each annular switch of one annular switch group is switched on at a time. Therefore, flexible switching from the charging module to the charging terminal can be realized through several annular switch groups, reasonable distribution of power is realized, reduction of occupied space is facilitated, in addition, the flexible switching circuit does not use a direct current contactor, the use cost and the failure rate are reduced, the service life is prolonged, and the flexible switching circuit is suitable for popularization and application. And each annular switch of one annular switch group is switched on at a time, so that accurate switching is realized, the safety of the charging process is improved, and the use is reliable.

Description

Technical Field

[0001] The present application relates to the technical field of charging control, and particularly to a flexible switching circuit and a flexible switching method. Background Art

[0002] With the increasing number of charging devices, the charging demand is also growing. The traditional switching method of a DC charging system generally constructs a switching matrix through DC contactors, copper bars, and wires. The switching matrix connects multiple charging modules and multiple charging guns. By turning on the DC contactors, the charging guns connected to them are turned on with the charging modules to conduct charging. The switching matrix can achieve the switching of charging power in a multi-to-multi manner.

[0003] However, this charging switching method requires a large number of DC contactors and copper bars to build the switching unit, which occupies a large space. Moreover, the DC contactors have a high cost and a high failure rate, thus affecting the lifespan of the entire charging system. Therefore, the traditional charging switching method has low reliability in use. Summary of the Invention

[0004] Based on this, in view of the technical problem of low reliability in the use of the traditional charging switching method, it is necessary to provide a flexible switching circuit and a flexible switching method with high reliability in use.

[0005] In a first aspect, the present application provides a flexible switching circuit, including at least two annular switch groups; wherein, each of the annular switch groups includes at least two annular switches stacked on top of each other;

[0006] Each charging module is respectively connected to a charging terminal through one of the annular switch groups. The annular switches of one annular switch group are respectively connected to different charging terminals and are all connected to the same charging module; only one of the annular switches of one annular switch group is turned on at a time.

[0007] In one embodiment, the annular switch includes a first outer contact point, a second outer contact point, a first inner contact point, a second inner contact point, and a knob. The first outer contact point is connected to the first inner contact point, and the second outer contact point is connected to the second inner contact point;

[0008] In one annular switch group, the first outer contact points of the annular switches are all connected to the same charging module, the second outer contact points of the annular switches are respectively connected to different charging terminals, the annular switches are coaxially arranged and share a knob. The positions of the first inner contact points of the annular switches are different, and the positions of the second inner contact points of the annular switches are different. When the knob is rotated to a position corresponding to the first inner contact point and the second inner contact point, it is connected to the first inner contact point and the second inner contact point.

[0009] In one embodiment, it further includes a motor, and the motor is connected to the knob.

[0010] In one embodiment, the number of the motors is the same as the number of the knobs, and one motor is correspondingly connected to one knob.

[0011] In one embodiment, it further includes a controller, and the controller is connected to the motor.

[0012] In one embodiment, it further includes an angle detection device, and the angle detection device is connected to the knob and the controller;

[0013] The angle detection device is configured to detect the rotation angle of the knob and send the rotation angle to the controller.

[0014] In one embodiment, it further includes an information prompt device, and the information prompt device is connected to the controller.

[0015] In one embodiment, in one set of ring switches, the ring switches are detachably stacked.

[0016] In one embodiment, the number of the sets of ring switches is greater than or equal to the number of the charging modules, and the number of the ring switches in one set of ring switches is greater than or equal to the number of the charging terminals.

[0017] In a second aspect, the present application provides a flexible switching method, which is implemented based on the flexible switching circuit of any one of the above embodiments. The method includes:

[0018] Obtain a charging request of a charging terminal;

[0019] Control the conduction states of the sets of ring switches according to the charging request.

[0020] For the above flexible switching circuit and flexible switching method, the flexible switching circuit includes at least two sets of ring switches; wherein, each set of ring switches includes at least two stacked ring switches; each charging module is respectively connected to a charging terminal through a set of ring switches, the ring switches in one set of ring switches are respectively connected to different charging terminals and are all connected to the same charging module; only one of the ring switches in one set of ring switches is conducted at a time. Thus, flexible switching from the charging module to the charging terminal can be realized through several sets of ring switches, so as to realize reasonable power distribution, which is beneficial to reducing the occupied space. In addition, the flexible switching circuit does not use a DC contactor, reducing the usage cost and failure rate, improving the service life, and only one of the ring switches in one set of ring switches is conducted at a time, realizing accurate switching, improving the safety of the charging process, and being reliable in use. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present application or in the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0022] Figure 1 It is a schematic structural diagram of a flexible switching circuit in an embodiment;

[0023] Figure 2 It is a schematic structural diagram of a ring switch in an embodiment;

[0024] Figure 3 It is a schematic structural diagram of a ring switch when the knob is in different positions in a ring switch group in an embodiment;

[0025] Figure 4 It is a schematic flowchart of a flexible switching method in an embodiment;

[0026] Figure 5 It is a topology diagram of matrix charging power switching in the prior art;

[0027] Figure 6 It is a schematic structural diagram of a flexible switching circuit in another embodiment;

[0028] Figure 7 It is a three-dimensional structural diagram of a ring switch group when the knob is in different positions in an embodiment. Detailed implementation manners

[0029] To facilitate the understanding of the present application, the following will describe the present application more comprehensively with reference to the relevant accompanying drawings. Embodiments of the present application are shown in the accompanying drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs. The terms used in the description of the present application in this specification are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0031] It will be understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0032] It will be understood that for "connection" in the following embodiments, if there is transmission of electrical signals or data between the connected circuits, modules, units, etc., it should be understood as "electrical connection", "communication connection", etc.

[0033] It will be understood that "at least one" means one or more, and "a plurality" means two or more. "At least part of an element" means part or all of the element.

[0034] As used herein, the singular forms "a", "an", and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprises / include", "has", etc. specify the presence of the stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the related listed items.

[0035] The embodiments of this application provide a flexible switching circuit, which is used to achieve flexible switching between a charging module and a charging terminal. Among them, the charging module refers to a module for providing electric energy, such as various charging stations and charging piles, etc. The charging terminal refers to a terminal that needs to be charged, or a device connected to the terminal that needs to be charged, such as a charging gun, etc. The flexible switching circuit provided by the embodiments of this application can be applied to various scenarios for charging a charging terminal, such as a charging station, etc.

[0036] In one embodiment, as Figure 1As shown in the figure, the flexible switching circuit includes at least two annular switch groups 10. Each annular switch group 10 includes at least two annular switches 102 stacked together. Each charging module 20 is connected to the charging terminal 30 through an annular switch group 10 respectively. The annular switches 102 of an annular switch group 10 are respectively connected to different charging terminals 30 and are all connected to the same charging module 20. Only one of the annular switches 102 of an annular switch group 10 is turned on at a time. Thus, the flexible switching from the charging module 20 to the charging terminal 30 can be realized through several annular switch groups 10, so as to realize the reasonable distribution of power, which is beneficial to reducing the occupied space. In addition, the flexible switching circuit does not use a DC contactor, reducing the use cost and failure rate, improving the service life. And only one of the annular switches 102 of an annular switch group 10 is turned on at a time to achieve accurate switching, improving the safety of the charging process and being reliable in use.

[0037] Each annular switch group 10 includes at least two annular switches 102 stacked together. The stacked arrangement means that the annular switches 102 are stacked in the height direction. The shapes and sizes of the annular switches 102 can be the same or different. When the shapes and sizes of the annular switches 102 in an annular switch group 10 are the same, it is beneficial to the flexible setting of each annular switch 102 and can also make the shape of the formed annular switch group 10 more regular, facilitating installation and use.

[0038] Each charging module 20 is connected to the charging terminal 30 through an annular switch group 10 respectively. The annular switches 102 of an annular switch group 10 are respectively connected to different charging terminals 30 and are all connected to the same charging module 20. The number of the annular switch groups 10 can be set according to actual needs, for example, it can be two, three,..., eight, etc. The number of the annular switch groups 10 can be the same as the number of the charging modules 20, so that each charging module 20 can be respectively connected to multiple charging terminals 30 through an annular switch group 10.

[0039] Furthermore, the number of the annular switches 102 in an annular switch group 10 can be set according to actual needs, for example, it can be two, three,..., eight, etc. The number of the annular switches 102 in an annular switch group 10 can be the same as the number of the charging terminals 30, so that each charging terminal 30 can be respectively connected to an annular switch 102 and has the opportunity to receive electric energy from the charging module 20 through the annular switch 102.

[0040] The annular switch group 10 includes at least two annular switches 102 stacked together. The structures of the annular switch groups 10 can be the same or different. When the structures of the annular switch groups 10 are the same, the number, structure and setting mode of the annular switches 10 included in each annular switch group 10 are the same, which is convenient for connecting the same charging terminals 30.

[0041] Exemplarily, taking the number of charging modules 20 and charging terminals 30 both being eight, and the number of ring switch groups 10 being eight, with one ring switch group 10 including eight ring switches 102 as an example, the eight ring switches 102 of the ring switch group 101 are respectively connected to charging terminals 301 - 308, and the eight ring switches 102 of the ring switch group 101 are all connected to the charging module 201. The eight ring switches 102 of the ring switch group 102 are respectively connected to charging terminals 301 - 308, and the eight ring switches 102 of the ring switch group 102 are all connected to the charging module 202. The eight ring switches 102 of the ring switch group 103 are respectively connected to charging terminals 301 - 308, and the eight ring switches 102 of the ring switch group 103 are all connected to the charging module 203... And so on, the eight ring switches 102 of the ring switch group 108 are respectively connected to charging terminals 301 - 308, and the eight ring switches 102 of the ring switch group 108 are all connected to the charging module 208. Thus, by controlling whether the ring switch group 10 is turned on, it is possible to control whether the charging module 20 connected to the ring switch group 10 is put into use. By controlling the specific ring switch 102 that is turned on in the ring switch group 10, it is possible to control the charging terminal 30 that is turned on with the charging module 20. Thus, through the eight ring switch groups 10, the flexible switching between the eight charging modules 20 and the eight charging terminals 30 can be achieved.

[0042] That each ring switch 102 of a ring switch group 10 is turned on one by one at a time means that in a ring switch group 10, only one ring switch 102 is turned on each time, and the situation where two or more ring switches 102 are turned on simultaneously will not occur. Thus, the possibility of misoperation and mis-switching of the ring switch group 10 can be reduced, and the working reliability of the ring switch group 10 can be improved. The way to achieve that each ring switch 102 of a ring switch group 10 is turned on one by one at a time is not unique. For example, each ring switch 102 of a ring switch group 10 is connected to a controller and can all be independently controlled. By setting the output signal of the controller to output a turn-on signal to only one ring switch 102 each time to control one ring switch 102 to turn on, it is achieved that each ring switch 102 of a ring switch group 10 is turned on one by one at a time. It can be understood that in other embodiments, it is also possible to achieve that each ring switch 102 of a ring switch group 10 is turned on one by one at a time through other means, which is not limited herein.

[0043] The above flexible switching circuit includes at least two annular switch groups 10. Among them, each annular switch group 10 includes at least two annular switches 102 stacked. Each charging module 20 is respectively connected to the charging terminal 30 through an annular switch group 10. The annular switches 102 of one annular switch group 10 are respectively connected to different charging terminals 30 and are all connected to the same charging module 20. Only one of the annular switches 102 of one annular switch group 10 is conducted at a time. Thus, the flexible switching from the charging module 20 to the charging terminal 30 can be realized through several annular switch groups 10, so as to realize the reasonable distribution of power, which is beneficial to reducing the occupied space. In addition, the flexible switching circuit does not use a DC contactor, reducing the use cost and failure rate, improving the service life. And only one of the annular switches 102 of one annular switch group 10 is conducted at a time to realize accurate switching, improving the safety of the charging process and being reliable in use.

[0044] The structure of the annular switch 102 is not unique. In an exemplary embodiment, as Figure 2 shown, the annular switch 102 includes a first outer contact point 112, a second outer contact point 122, a first inner contact point 132, a second inner contact point 142 and a knob 152. The first outer contact point 112 is connected to the first inner contact point 132, and the second outer contact point 122 is connected to the second inner contact point 142.

[0045] In one annular switch group 10, the first outer contact points 112 of the annular switches 102 are all connected to the same charging module 20. The second outer contact points 122 of the annular switches 102 are respectively connected to different charging terminals 30. The annular switches 102 are coaxially arranged and share a knob 152. The positions of the first inner contact points 132 of the annular switches 102 are different, and the positions of the second inner contact points 142 of the annular switches 102 are different. When the knob 152 is rotated to the position corresponding to the first inner contact point 132 and the second inner contact point 142, it is connected to the first inner contact point 132 and the second inner contact point 142.

[0046] The first outer contact point 112 and the second outer contact point 122 are used as the media for the annular switch 102 to connect with external devices, and are respectively used to connect the charging module 20 and the charging terminal 30. Among them, in one annular switch group 10, the first outer contact points 112 of the annular switches 102 are all connected to the same charging module 20, and the second outer contact points 122 of the annular switches 102 are respectively connected to different charging terminals 30, realizing the connection between one charging module 20 and multiple charging terminals 30 through one annular switch group 10.

[0047] The first outer contact point 112 is connected to the first inner contact point 132, and the second outer contact point 122 is connected to the second inner contact point 142. The first outer contact point 112 can be connected to the first inner contact point 132 through a wire, and the second outer contact point 122 can be connected to the second inner contact point 142 through a wire.

[0048] Both the first inner contact point 132 and the second inner contact point 142 are contacts inside the annular switch 102 for connecting the knob 152. The first inner contact point 132 and the second inner contact point 142 are oppositely arranged. When the knob 152 is rotated to a position corresponding to the first inner contact point 132 and the second inner contact point 142, it is connected to the first inner contact point 132 and the second inner contact point 142. Exemplarily, the knob 152 can be a conductive knob 152, and electrodes can be provided at the ends of the knob 152. When the knob 152 is rotated to a position corresponding to the first inner contact point 132 and the second inner contact point 142, the ends of the knob 152 contact the first inner contact point 132 and the second inner contact point 142, so that the knob 152 is electrically connected to the first inner contact point 132 and the second inner contact point 142. When the knob 152 is electrically connected to the first inner contact point 132 and the second inner contact point 142, since the first inner contact point 132 is connected to the first outer contact point 112 and the second inner contact point 142 is connected to the second outer contact point 122, the first outer contact point 112 and the second outer contact point 122 can be made conductive, so that the charging module 20 connected to the first outer contact point 112 and the charging terminal 30 connected to the second outer contact point 122 are made conductive to achieve charging.

[0049] In addition, in an annular switch group 10, the annular switches 102 are coaxially arranged and share a knob 152, that is, the angles and positions of the knobs 152 in each annular switch 102 are the same. The positions of the first inner contact points 132 of the annular switches 102 are different, and the positions of the second inner contact points 142 of the annular switches 102 are different. The first inner contact point 132 and the second inner contact point 142 are oppositely arranged, and in different annular switches 102 of an annular switch group 10, the angles formed by the connecting lines of the first inner contact point 132 and the second inner contact point 142 are different.

[0050] For example, in Figure 3Among them, the angle formed by the connection line of the first inner contact point 132 and the second inner contact point 142 of the first layer (the uppermost layer) of the annular switch 102 is 0°. When the knob 152 is rotated to the 0° position, the end of the knob 152 is electrically connected to the first inner contact point 132 and the second inner contact point 142 of the annular switch 102 of the first layer. The angle formed by the connection line of the first inner contact point 132 and the second inner contact point 142 of the annular switch 102 of the second layer is 20°. When the knob 152 is rotated to the 20° position, the end of the knob 152 is electrically connected to the first inner contact point 132 and the second inner contact point 142 of the annular switch 102 of the second layer. The angle formed by the connection line of the first inner contact point 132 and the second inner contact point 142 of the annular switch 102 of the third layer is 40°. The angle formed by the connection line of the first inner contact point 132 and the second inner contact point 142 of the annular switch 102 of the fourth layer is 60°. The angle formed by the connection line of the first inner contact point 132 and the second inner contact point 142 of the annular switch 102 of the fifth layer is 80°. The angle formed by the connection line of the first inner contact point 132 and the second inner contact point 142 of the annular switch 102 of the sixth layer is 100°. The angle formed by the connection line of the first inner contact point 132 and the second inner contact point 142 of the annular switch 102 of the seventh layer is 120°. The angle formed by the connection line of the first inner contact point 132 and the second inner contact point 142 of the annular switch 102 of the eighth layer is 140°. It can be understood that in other embodiments, the arrangement positions of the first inner contact point 132 and the second inner contact point 142 of different annular switches 102 can also be other, which are not limited herein.

[0051] Since the positions of the first inner contact points 132 of the respective annular switches 102 are different, and the positions of the second inner contact points 142 of the respective annular switches 102 are different, when the knob 152 is rotated to different angles, it may be electrically connected to the first inner contact point 132 and the second inner contact point 142 of one annular switch 102 in an annular switch group 10, and it is impossible to be electrically connected to the first inner contact points 132 and the second inner contact points 142 of two or more annular switches 102 in an annular switch group 10. Thus, each annular switch 102 in an annular switch group 10 can be electrically connected one by one.

[0052] In this embodiment, the ring switch 102 includes a first outer contact point 112, a second outer contact point 122, a first inner contact point 132, a second inner contact point 142, and a knob 152. The first outer contact point 112 is connected to the first inner contact point 132, and the second outer contact point 122 is connected to the second inner contact point 142. In a ring switch group 10, the first outer contact points 112 of all the ring switches 102 are connected to the same charging module 20, the second outer contact points 122 of all the ring switches 102 are respectively connected to different charging terminals 30. All the ring switches 102 are coaxially arranged and share a knob 152. The positions of the first inner contact points 132 of all the ring switches 102 are different, and the positions of the second inner contact points 142 of all the ring switches 102 are different. When the knob 152 is rotated to a position corresponding to the first inner contact point 132 and the second inner contact point 142, it is connected to the first inner contact point 132 and the second inner contact point 142. Through the above structure, each of the ring switches 102 in a ring switch group 10 can be turned on one by one at a time. By controlling the conduction state of the ring switch group 10, it can be controlled whether the charging module 20 is put into use. By rotating the knob 152 to different positions, different charging terminals 30 can be controlled to be charged, realizing flexible switching of multiple charging modules 20 to charge the charging terminals 30.

[0053] In an exemplary embodiment, the flexible switching circuit further includes a motor, and the motor is connected to the knob 152. Wherein, the motor can be a stepper motor. The connection mode between the motor and the knob 152 can be direct connection or indirect connection through a transmission member. When the motor rotates, it can drive the knob 152 to rotate, so that the knob 152 is in different positions.

[0054] In this embodiment, the flexible switching circuit further includes a motor, and the motor is connected to the knob 152. The motor can drive the knob 152 to rotate, so that the knob 152 is in different positions, realizing electric control of the knob 152, and thus more conveniently turning on different ring switches 102.

[0055] The number of motors is not unique. In an exemplary embodiment, the number of motors is the same as the number of knobs 152, and one motor is correspondingly connected to one knob 152. Thus, each knob 152 is controlled by one motor respectively, and the state of each knob 152 is independent and not affected by the states and positions of other knobs 152. Thus, different motors can make different knobs 152 be in different positions through different motors, so as to adjust the conduction between different charging modules 20 and different charging terminals 30, with higher flexibility.

[0056] In an exemplary embodiment, the flexible switching circuit further includes a controller, and the controller is connected to the motor.

[0057] Among them, the controller can control the working state of the motor by sending signals to the motor, thereby controlling the position of the knob 152. Exemplarily, the controller is connected to the motor through a communication line, and the control signal is transmitted through the communication line to accurately control the rotation angle of the motor. Exemplarily, the communication line can be an RS485 communication line.

[0058] In addition, the controller can be communicatively connected to the charging terminal 30. The charging terminal 30 can send a charging request to the controller, and the charging request can carry the identification information and required power of the charging terminal 30. After receiving the charging request, the controller can control the working state of the motor according to the charging request, thereby controlling the positions of the knobs 152, and further controlling the conduction states of the annular switch groups 10, so as to control the corresponding charging modules 20 and the charging terminal 30 to conduct, realizing the on-demand charging of the charging terminal 30 and improving the working performance of the flexible switching circuit.

[0059] Furthermore, the controller can achieve microstep control of the motor through a high-precision control circuit and a driver. Among them, the control circuit and the driver can be integrated in the controller or can be external devices of the controller. Microstep control is to control each step angle of the motor so that the motor can accurately control its position in each microstep. This control method can provide higher rotation resolution and lower vibration noise, and can significantly improve the accuracy and smoothness of the motor, and is applicable to application scenarios with high requirements for position and speed control.

[0060] In this embodiment, the flexible switching circuit further includes a controller, and the controller is connected to the motor. Through the controller, accurate and intelligent control of the motor can be achieved, improving the automation degree of the flexible switching circuit.

[0061] In an exemplary embodiment, the flexible switching circuit further includes an angle detection device, and the angle detection device is connected to the knob 152 and the controller. The angle detection device is used to detect the rotation angle of the knob 152 and send the rotation angle to the controller.

[0062] Among them, the angle detection device can be arranged on the knob 152 or can be arranged at other positions and be in contact with the knob 152, which is convenient for accurately detecting the position of the knob 152. The angle detection device is used to detect the rotation angle of the knob 152 and send the rotation angle to the controller.

[0063] After the controller receives the rotation angle, it can compare the rotation angle with a preset angle. When the current rotation angle does not reach any of the preset angles, the controller can determine that the knob 152 is not rotated in place, which will cause the power transmission between the charging module 20 and the charging terminal 30 to be impossible. In this case, the controller can send an adjustment signal to the motor according to the difference between the received rotation angle and the preset angle, so that the motor drives the knob 152 to rotate until the knob 152 reaches the preset position, thereby accurately controlling the position of the knob 152.

[0064] In this embodiment, the flexible switching circuit further includes an angle detection device, and the angle detection device is connected to the knob 152 and the controller. The angle detection device is used to detect the rotation angle of the knob 152 and send the rotation angle to the controller. Through the angle detection device, the feedback adjustment and control of the rotation angle of the knob 152 can be realized, which is convenient for the knob 152 to be in an accurate position and improves the effectiveness of charging switching.

[0065] In an exemplary embodiment, the flexible switching circuit further includes an information prompting device, and the information prompting device is connected to the controller.

[0066] The controller can send a prompt signal to the information prompting device to make the information prompting device emit a prompt signal corresponding to the prompt signal, which is convenient for the user to timely understand the working state of the flexible switching circuit. Exemplarily, after the controller receives the rotation angle of the knob 152 detected by the angle detection device, it can send the value of the rotation angle to the information prompting device for display. Or, when the controller determines that the current rotation angle of the knob 152 does not reach the preset angle, it can send an alarm signal to the information prompting device to make the information prompting device emit a corresponding alarm message to remind the staff to handle the abnormal situation in time.

[0067] The type of the information prompting device is not limited. Exemplarily, it can be a display screen, a prompt lamp or a voice prompting device, etc., which can be selected according to actual needs.

[0068] In this embodiment, the flexible switching circuit further includes an information prompting device, and the information prompting device is connected to the controller. Through the controller and the information prompting device, various prompt messages can be sent, which is convenient for the user to timely understand the working state of the flexible switching circuit and enables the working state of the flexible switching circuit to better meet the user's needs.

[0069] In an exemplary embodiment, in a ring switch group 10, the ring switches 102 are detachably stacked. Among them, the method of realizing the detachable stacking of the ring switches 102 is not unique. Exemplarily, the ring switches 102 are stacked by snap connection, and the disassembly between the ring switches 102 can be realized by adjusting the closed state of the snap. Alternatively, the ring switches 102 are connected and stacked by bonding or magnetic attraction, and the disassembly between the ring switches 102 can be realized.

[0070] In this embodiment, in a ring switch group 10, the ring switches 102 are detachably stacked. Thus, by disassembly and assembly, the number of ring switches 102 included in a ring switch group 10 can be quickly changed, for example, the number of ring switches 102 can be changed according to the number of charging terminals 30, improving the working adaptability of the flexible switching circuit. In addition, by disassembly and assembly, it is also convenient to timely remove the faulty ring switch 102 for replacement, so as to improve the working reliability of the flexible switching circuit.

[0071] The number of ring switch groups 10 is not unique, and the number of ring switches 102 in a ring switch group 10 is not unique either. In an exemplary embodiment, the number of ring switch groups 10 is greater than or equal to the number of charging modules 20, and the number of ring switches 102 in a ring switch group 10 is greater than or equal to the number of charging terminals 30.

[0072] When the number of ring switch groups 10 is equal to the number of charging modules 20, each charging module 20 can be respectively connected to the charging terminal 30 through a ring switch group 10, enabling each charging module 20 to be put into use. When the number of ring switch groups 10 is greater than the number of charging modules 20, if there is a faulty ring switch group 10, a spare ring switch group 10 can also be provided in time to ensure that each charging module 20 can be respectively connected to the charging terminal 30 through a ring switch group 10.

[0073] When the number of ring switches 102 in a ring switch group 10 is equal to the number of charging terminals 30, each charging terminal 30 can be respectively connected to the charging module 20 through a ring switch 102, enabling each charging terminal 30 to have the opportunity to be charged. When the number of ring switches 102 in a ring switch group 10 is greater than the number of charging terminals 30, the faulty ring switches 102 can be discarded in time, and when the number of charging terminals 30 increases, available ring switches 102 can also be provided to connect the charging terminals 30, improving the working flexibility of the flexible switching circuit.

[0074] In this embodiment, the number of the annular switch groups 10 is greater than or equal to the number of the charging modules 20, and the number of the annular switches 102 in one annular switch group 10 is greater than or equal to the number of the charging terminals 30. Thus, it is beneficial for each charging module 20 and each charging terminal 30 to be put into use, and it is also beneficial to improve the working flexibility of the flexible switching circuit.

[0075] In one embodiment, a flexible switching method is provided, which is implemented based on the flexible switching circuit of any of the above embodiments. The flexible switching method can be executed by a controller. As Figure 4 shown, the flexible switching method includes step 402 and step 404. Among them:

[0076] Step 402, obtaining a charging request of a charging terminal.

[0077] The charging terminal 30 can send a charging request to the controller, and the charging request can carry the identification information and the required power of the charging terminal 30.

[0078] Step 404, controlling the conduction states of the annular switch groups according to the charging request.

[0079] After receiving the charging request, the controller can control the working state of the motor according to the charging request, so as to control the positions of the knobs 152, and further control the conduction states of the annular switch groups 10, so as to control the corresponding charging modules 20 and charging terminals 30 to conduct, realize the charging-on-demand of the charging terminal 30, and improve the working performance of the flexible switching circuit.

[0080] The above flexible switching method is implemented based on the flexible switching circuit. Through several annular switch groups 10, the flexible switching from the charging module 20 to the charging terminal 30 can be realized, so as to realize the reasonable distribution of power, which is beneficial to reducing the occupied space. In addition, the flexible switching circuit does not use a DC contactor, reduces the use cost and failure rate, improves the service life, and each annular switch 102 of one annular switch group 10 conducts one by one at a time, realizing accurate switching, improving the safety of the charging process, and being reliable in use.

[0081] In an exemplary embodiment, the flexible switching method further includes steps: obtaining the rotation angle of the knob 152 and controlling the motor to work according to the rotation angle.

[0082] Among them, after the rotation angle of the knob 152 is detected by the angle detection device, it can be sent to the controller. After receiving the rotation angle, the controller can compare the rotation angle with a preset angle. When the current rotation angle does not reach any of the preset angles, the controller can determine that the knob 152 is not rotated in place, which will cause the power transmission between the charging module 20 and the charging terminal 30 to be impossible. In this case, the controller can send an adjustment signal to the motor according to the difference between the received rotation angle and the preset angle, so that the motor drives the knob 152 to rotate until the knob 152 reaches the preset position, thereby accurately controlling the position of the knob 152.

[0083] In an exemplary embodiment, the flexible switching method further includes the step of controlling the operation of the information prompting device according to the rotation angle control information.

[0084] The controller can send a prompt signal to the information prompting device, so that the information prompting device emits a prompt signal corresponding to the prompt signal, which is convenient for the user to timely understand the working state of the flexible switching circuit. Exemplarily, after receiving the rotation angle of the knob 152 detected by the angle detection device, the controller can send the value of the rotation angle to the information prompting device for display. Or, when the controller determines that the current rotation angle of the knob 152 does not reach the preset angle, it can send an alarm signal to the information prompting device, so that the information prompting device emits a corresponding alarm message to remind the staff to handle the abnormal situation in time.

[0085] To better understand the above embodiments, the following will be explained in detail in combination with a specific embodiment.

[0086] The traditional switching method is matrix-type charging power switching. For the topology diagram, please refer to Figure 5 , the charging modules 201# - 208# are 8 power units, and the charging guns A# - H# are 8 charging terminals 30. The matrix power distribution network in the figure is composed of circular nodes (DC contactors) and copper bars. It can be seen from the matrix power distribution network in the figure that since any charging module 20 can reach any charging terminal 30 through the nodes, the output power of any charging module 20 can be distributed to any charging gun port. Through this matrix transformation method, the matrix power distribution network realizes the flexible configuration of the input power to the output terminal. The matrix-type power switching circuit can dynamically distribute the charging power according to the charging requirements sent by the battery management system of the charging vehicle through the power distribution strategy, so as to meet the different power requirements for charging various vehicle models.

[0087] In the matrix-type charging power switching topology, assuming there are N groups of charging modules 20 and M charging gun ports, then in order to achieve full matrix power distribution, the number of contactors required follows the following formula:

[0088] Number of contactors = N (number of charging modules 20) × M (number of charging guns) × 2 (because each connection point requires two positive and negative contactors). For example, if there are 4 groups of charging modules 20 and 4 charging guns, then the number of contactors required is 4×4×2=32.

[0089] From the above calculation, it can be seen that the rectangular switching power distribution method requires a large number of DC contactors and copper bars to build a power switching matrix. The DC contactor is expensive, and as an electronic switching device, the contactor has a high failure rate, which affects the life of the entire charging system. In addition, the use of a large number of copper bars will take up a lot of space, adding additional installation difficulty and cost.

[0090] In view of the above shortcomings, the present application proposes a flexible switching circuit, which solves the problems of high cost of direct contactors and large space occupation of copper busbar matrix. Moreover, since the annular switch 102 can only be at one angle at each moment, the possibility of misoperation and mis-switching of the contactor is completely eliminated, thereby improving the safety of the charging process.

[0091] Specifically, in one embodiment, the flexible switching circuit includes eight ring switch groups 10, and each ring switch group 10 includes eight ring switches 102. Take eight charging modules and eight charging guns as an example: Figure 6 As shown, AU1, ...AU8 represent 8 charging modules respectively, X11, X12 ... X18 are 8 layers of ring switches, these eight layers of ring switches are stacked to form ring switch group 1, and so on, X81, X82 ... X88 are 8 layers of ring switches, these eight layers of ring switches 102 are stacked to form ring switch group 8, QT11, QT12 ... QT18 are 8 charging gun heads. Therefore, only 8 ring switch groups are needed to realize the power distribution of 8 charging modules to 8 charging terminals in any combination. According to the charging demand issued by a certain charging terminal, the charging power of the charging terminal is judged, and according to the number of existing remaining idle charging modules, it is judged how many charging modules need to be put into this charging terminal, and then the corresponding action is performed through the ring switch.

[0092] The ring switch can be controlled by a motor, and the specific control method can be micro-step control. Micro-step control is to control each step angle so that the motor can accurately control the position in each micro-step. This control method can provide higher rotation resolution and lower vibration noise, which can significantly improve the accuracy and smoothness of the motor and is suitable for applications with high requirements for position and speed control.

[0093] Specifically, the communication line can be used to transmit control signals to accurately control the rotation angle of the motor, and the current rotation angle of the motor can be fed back through communication, so that the controller can conveniently control the motor to achieve the switching of the ring switch 102.

[0094] Combine Figure 6 and Figure 7 As shown, connect the first outer contact points 1, 5, 9... 29 of the first layer, the second layer,..., the eighth layer (i.e., eight ring switches 102) of the ring switch group 10 together, and connect to the positive pole of the charging module 20;

[0095] Connect the first outer contact points 3, 7, 11... 31 of the first layer, the second layer,..., the eighth layer (i.e., eight ring switches 102) of the ring switch group 10 together, and connect to the negative pole of the charging module 20;

[0096] For the switching rule of the ring switch 102, please refer to Table 1.

[0097] Table 1

[0098]

[0099] Connect the knob 152 of the motor to the ring switch 102, and control the ring switch 102 to switch 8 angles such as 0°, 20°... 140° respectively through communication instructions;

[0100] When the knob 152 of the ring switch 102 is at 0°, 1 and 2 of the first layer of the ring switch 102 are connected, and 3 and 4 are connected;

[0101] When the knob 152 of the ring switch 102 is at 20°, 5 and 6 of the second layer of the ring switch 102 are connected, and 7 and 8 are connected;

[0102] And so on...

[0103] When the knob 152 of the ring switch 102 is at 140°, 29 and 30 of the eighth layer of the ring switch 102 are connected, and 31 and 32 are connected;

[0104] By controlling the motor, the angle of the ring switch 102 can be accurately controlled, so as to achieve the purpose of switching the charging modules AU1... AU8 to any one of the 8 charging guns.

[0105] The above flexible switching circuit has beneficial effects such as saving a large number of control ports, saving a large amount of space, reducing control difficulty, saving costs, and preventing mis-switching.

[0106] In the description of this specification, the descriptions referring to terms such as "some embodiments", "other embodiments", etc. mean that the specific features, structures, materials or features described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example.

[0107] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0108] The above-described embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A flexible switching circuit, characterized in that, including at least two annular switch groups; wherein, each of the annular switch groups includes at least two annular switches stacked on top of each other; each charging module is respectively connected to a charging terminal through one of the annular switch groups, the annular switches of one annular switch group are respectively connected to different charging terminals and are all connected to the same charging module; only one of the annular switches of one annular switch group is conducted at a time.

2. The flexible switching circuit according to claim 1, wherein The annular switch includes a first outer contact point, a second outer contact point, a first inner contact point, a second inner contact point and a knob, the first outer contact point is connected to the first inner contact point, and the second outer contact point is connected to the second inner contact point; in one annular switch group, the first outer contact points of the annular switches are all connected to the same charging module, the second outer contact points of the annular switches are respectively connected to different charging terminals, the annular switches are coaxially arranged and share one knob, the positions of the first inner contact points of the annular switches are different, and the positions of the second inner contact points of the annular switches are different. When the knob is rotated to a position corresponding to the first inner contact point and the second inner contact point, it is connected to the first inner contact point and the second inner contact point.

3. The flexible switching circuit according to claim 2, wherein It further includes a motor, and the motor is connected to the knob.

4. The flexible switching circuit according to claim 3, wherein The number of the motors is the same as the number of the knobs, and one motor is correspondingly connected to one knob.

5. The flexible switching circuit according to claim 3, characterized in that, It further includes a controller, and the controller is connected to the motor.

6. The flexible switching circuit according to claim 5, wherein It further includes an angle detection device, and the angle detection device is connected to the knob and the controller; the angle detection device is used to detect the rotation angle of the knob and send the rotation angle to the controller.

7. The flexible switching circuit according to claim 6, wherein It further includes an information prompt device, and the information prompt device is connected to the controller.

8. The flexible switching circuit according to claim 1, wherein In one annular switch group, the annular switches are detachably stacked.

9. The flexible switching circuit according to claim 1, wherein The number of the annular switch groups is greater than or equal to the number of the charging modules, and the number of the annular switches in one annular switch group is greater than or equal to the number of the charging terminals.

10. A flexible switching method, characterized in that, Implemented based on the flexible switching circuit according to any one of claims 1-9, the method includes: obtaining a charging request of a charging terminal; controlling the conduction states of the annular switch groups according to the charging request.

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