Power switching device and charging system
By designing a modular power switching board and a small, high-power magnetic latching relay, combined with real-time voltage detection and fault warning, the problems of complex wiring and difficult maintenance in the charging pile are solved, achieving efficient power distribution and system reliability.
Patent Information
- Application Number
- CN202520434834.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-12
AI Technical Summary
In existing charging piles, the use of high-voltage contactors leads to complex wiring, high costs, and difficult maintenance, making it difficult to achieve efficient power switching and circuit reliability.
It adopts a small, high-power magnetic latching relay and a modular power switching board design, combined with real-time voltage detection and anomaly detection units, to achieve precise power distribution and fault early warning through the control module, simplifying wiring and maintenance.
It reduces wiring costs and maintenance difficulty, improves circuit reliability and scalability, and enhances system flexibility and security.
Smart Images
Figure CN223904911U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of electronic circuits, in particular to a power switching device and a charging system. BACKGROUND
[0002] The charging stack is a large power cluster used to meet large-scale charging demand. The power switching module of the charging stack is a key device in the electric vehicle charging station, which intelligently combines and switches power according to the charging terminal demand and the state of the multiple charging modules inside the charging stack to meet the charging demand of different types of charging terminals. To achieve full combination of power switching, the product of the module and the terminal needs to be controlled by independent switches. Currently, the switching switch in the charging stack market usually uses a high-voltage contactor, which is relatively large in size and cannot be directly installed on the circuit board, but needs to be installed separately. A large number of control points means that the maintenance difficulty increases.
[0003] Since the power switching involves multiple modules, terminals and switches, the connection between the main circuit, the control circuit of the switch and the auxiliary contact feedback circuit requires a complex wiring system, which not only puts higher requirements on the material and current flow of the power cable, but also requires professional wiring design and construction, resulting in high wiring cost. The complex wiring system makes it more difficult to locate and repair abnormalities. CONTENT OF THE UTILITY MODEL
[0004] To solve the above problems, the present application provides a power switching device and a charging system, which can simplify circuit design, reduce cost and maintenance difficulty, and improve the reliability of the circuit.
[0005] One of the technical solutions adopted by the present application is to provide a power switching device, which comprises: a plurality of power switching boards, the input end of each power switching board being used to couple at least two power supply ends, and the output end of each power switching board being used to couple a charging terminal; wherein a plurality of power switches are arranged on each power switching board, the first end of each power switch being connected to at least one power supply end through the input end, the second end of the plurality of power switches being connected to the charging terminal through the output end, and the control end of each power switch being connected to the control end of the power switching board.
[0006] In an embodiment, the power switching device further comprises a control module, the input end of the control module being connected to each power supply end and each charging terminal, and the output end of the control module being connected to the control end of each power switching board.
[0007] In an embodiment, the control module comprises a detection unit, the detection unit being connected to the feedback end of each power switching board.
[0008] In an embodiment, the feedback end of each power switching board is connected to each power switch.
[0009] In an embodiment, each power switching board includes a plurality of inputs, each input being connected to a first end of a power switch; inputs connected to the same power supply end in the plurality of power switching boards are connected by a first connecting conductor, the other end of the first connecting conductor being connected to the corresponding power supply end.
[0010] In an embodiment, the plurality of power switching boards are arranged in a hierarchy in the length direction of the first connecting conductor.
[0011] In an embodiment, the power switch is a magnetic latching relay.
[0012] The application also provides a charging system, which includes a plurality of power supply ends and a power switching device, the power switching device being as described above.
[0013] In an embodiment, each power supply end includes a conversion module, a first end of the conversion module being coupled to a busbar, a second end of the conversion module being coupled to an input of each power switching board.
[0014] In an embodiment, the charging system further includes a plurality of charging connection modules, a first end of each charging connection module being coupled to an output of the corresponding power switching board, a second end of each charging connection module being coupled to a charging terminal.
[0015] One technical solution adopted by the application is to provide a power switching device, which includes: a plurality of power switching boards, an input of each power switching board being used to couple at least two power supply ends, an output of each power switching board being used to couple a charging terminal; wherein a plurality of power switches are arranged on each power switching board, a first end of each power switch being connected to at least one power supply end through the input, a second end of the plurality of power switches being connected to the charging terminal through the output, a control end of each power switch being connected to a control end of the power switching board. In this way, the power switching module is designed to be on-board, different numbers of power switches can be arranged through the power switching board, or a plurality of power switching boards are connected in parallel to meet the access of different numbers of charging modules, thereby simplifying the circuit design, reducing the maintenance difficulty and cost, and improving the reliability and expandability of the circuit. BRIEF DESCRIPTION OF DRAWINGS
[0016] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.
[0017] In the drawings:
[0018] Figure 1is a structural schematic diagram of a first embodiment of the power switching device provided in the present application;
[0019] Figure 2 is a structural schematic diagram of a second embodiment of the power switching device provided in the present application;
[0020] Figure 3 is a structural schematic diagram of a third embodiment of the power switching device provided in the present application;
[0021] Figure 4 is a structural schematic diagram of a first embodiment of the charging system provided in the present application;
[0022] Figure 5 is a structural schematic diagram of a second embodiment of the charging system provided in the present application. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, but not all the structures. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0024] The terms "first", "second", and the like in the present application are used to distinguish different objects, but not to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but optionally includes other steps or units not listed or optionally includes other steps or units inherent to the process, method, product or device.
[0025] In this document, the term "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it mutually exclusive or alternative to other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.
[0026] Reference Figure 1 , Figure 1 is a structural schematic diagram of a first embodiment of the power switching device provided in the present application. The power switching device 100 includes a plurality of power switching boards 10.
[0027] The input end of each power switching board 10 is used to couple at least two power supply ends 200, and the output end of each power switching board 10 is used to couple a charging terminal 300.
[0028] A plurality of power switches K are arranged on each power switching board 10, the first end of each power switch K is connected to at least one power supply end 200 through the input end, the second end of the plurality of power switches K is connected to the charging terminal 300 through the output end, and the control end of each power switch K is connected to the control end of the power switching board 10.
[0029] Specifically, the charging terminal 300 can be various devices that need to be charged, such as electric vehicles, electric cars, etc. A single power switching board 10 can couple multiple power supply ends 200 and one charging terminal 300, that is, the charging terminal 300 can receive electric energy from multiple power supply ends 200 through the power switching board 10. The power supply ends 200 and the charging terminal 300 are connected through the power switches K to form a charging loop. The power switch K is a key element for controlling the transmission of electric energy, and can selectively turn on or turn off the circuit according to the control signal. By controlling the conduction and closure of the power switch K, the number of power supply ends 200 connected to the charging loop can be flexibly selected, that is, power distribution is realized.
[0030] The control end of the power switching board 10 is connected to the control end of each power switch K, and the control end of the power switching board 10 can receive a control signal from an external control module 20. According to different control signals, the power switch K can be turned on or turned off, thereby realizing accurate control of the transmission of electric energy.
[0031] In an embodiment, the power switch K is a magnetic latching relay. Specifically, it can be a small and high-power magnetic latching relay. The first end (such as normally open or normally closed contact) of the small and high-power magnetic latching relay is connected to the power supply end 200 through the input end of the power switching board 10, and the second end is connected to the charging terminal 300 through the output end.
[0032] Specifically, such a relay not only has a small size, which is convenient for integration into the power switching board 10, thereby saving space, but also can withstand a large power, which meets the high-power charging demand and ensures the stability and reliability of the transmission of electric energy. After being powered on, the magnetic latching relay maintains the switch state through magnetic action, that is, even if the control signal disappears, the switch will maintain the current state. This feature enables the relay to reduce the continuous input of the control signal in the case of continuous power-on, thereby reducing energy consumption.
[0033] Wherein, the small high-power relay has no arc extinguishing device, and when high-voltage high-power switching is performed, the contact may be seriously ablated due to the action of arc, thereby reducing the electrical life of the relay, so when the switching operation is performed, it is necessary to ensure that it is performed under no work or low voltage difference, that is, the difference between the current and voltage at both ends of the power switch K is less than the preset threshold value, and then the turn-on and turn-off operations are performed.
[0034] In the above scheme, the small high-power magnetic latching relay as the power switch K can save layout space and reduce cost; when a fault occurs, the power switching board can be directly replaced without the need to check each power switch itself, thereby reducing the maintenance difficulty; since each power switching board 10 can be coupled to multiple power supply ends 200 through the power switch K, by adjusting the connection and control mode of the power switch K, complex power distribution and switching strategies can be realized, and the charging efficiency is improved; at the same time, by increasing or reducing the number of power switching boards 10, the charging needs of multiple charging terminals 300 can be met.
[0035] Referring to Figure 2 , Figure 2 is a structural schematic diagram of a second embodiment of the power switching device provided by the present application. The power switching device 100 includes multiple power switching boards 10 and a control module 20.
[0036] Wherein, the input end of each power switching board 10 is used to couple at least two power supply ends 200, and the output end of each power switching board 10 is used to couple a charging terminal 300.
[0037] Wherein, multiple power switches K are arranged on each power switching board 10, the first end of each power switch K is connected to at least one power supply end 200 through the input end, the second end of the multiple power switches K is connected to the charging terminal 300 through the output end, and the control end of each power switch K is connected to the control end of the power switching board 10.
[0038] The input end of the control module 20 is connected to each power supply end 200 and each charging terminal 300, respectively, and the output end of the control module 20 is connected to the control end of each power switching board 10.
[0039] Specifically, the input end of the control module 20 is designed with a voltage detection unit (not shown in the figure), which can detect the output voltage value of each power supply end 200 and each charging terminal 300 in real time and accurately, for example, through a high-precision voltage sensor or an analog-to-digital converter. At the same time, the control module 20 will conduct comprehensive analysis according to the collected voltage data combined with the charging current, charging time, battery state, etc. of the charging terminal 300, and through the built-in algorithm or logical judgment, the control module 20 can determine the power size required by the current charging terminal 300, the number of power supply ends 200 connected, etc. and issue a control signal to the control end of the power switching board 10 to control the conduction or disconnection of the power switch K, and connect multiple power supply ends 200 to the charging circuit or reduce the number of power supply ends 200.
[0040] In the above scheme, by detecting the voltage values of the power supply end 200 and the charging terminal 300 in real time, the control module 20 can accurately connect the power supply end 200 to the charging circuit according to the charging demand, and can timely discover and handle potential faults or abnormal situations, thereby improving the charging efficiency and the reliability of the system; at the same time, according to the charging demand of different charging terminals 300, the connection and disconnection of the power supply end 200 are dynamically adjusted to meet various complex charging scenarios, and the flexibility of the system is enhanced.
[0041] In some embodiments, the control module 20 includes a detection unit (not shown in the figure), which is connected to the feedback end of each power switching board 10.
[0042] In some embodiments, the feedback end of each power switching board 10 is connected to each power switch K.
[0043] Specifically, the detection unit is used for abnormality detection, and the detection unit is connected to the feedback end of each power switching board 10, and the feedback end of each power switching board 10 is connected to each power switch K, so that the detection unit can continuously monitor the working state of the power switch K, such as whether the contact is in good contact, whether there is overheating or short circuit, etc. When the power switch K is abnormal, such as contact ablation or adhesion, etc., the power switching board 10 will send an abnormal signal to the detection unit through the feedback end; the detection unit will send a warning signal according to the abnormal signal, and the warning signal can be in the form of audible and visual alarm, display screen prompt or remote communication alarm, etc.
[0044] In the above scheme, by detecting the abnormal state of the power switch K in real time and timely issuing a warning signal, the system failure or safety accident caused by the failure of the power switch K can be effectively prevented, thereby improving the safety and reliability of the circuit.
[0045] Referring to Figure 3 , Figure 3 is a structural schematic diagram of a third embodiment of the power switching device provided by the present application. The power switching device 100 includes a plurality of power switching boards 10.
[0046] The input terminal of each power switching board 10 is used to couple to at least two power supply terminals 200, and the output terminal of each power switching board 10 is used to couple to a charging terminal 300.
[0047] Each power switching board 10 is provided with multiple power switches K. The first end of each power switch K is connected to at least one power supply terminal 200 through the input terminal, and the second end of the multiple power switches K is connected to the charging terminal 300 through the output terminal. The control terminal of each power switch K is connected to the control terminal of the power switching board 10.
[0048] In some embodiments, each power switching board 10 includes a plurality of input terminals, each input terminal being connected to the first terminal of a power switch K; the input terminals of the plurality of power switching boards 10 connected to the same power supply terminal 200 are connected through a first connecting conductor 30, and the other end of the first connecting conductor 30 is connected to the corresponding power supply terminal 200.
[0049] In some embodiments, a plurality of power switching plates 10 are arranged in layers along the length direction of the first connecting conductor 30.
[0050] In an application scenario, such as Figure 3 As shown, to meet the charging needs of multiple charging terminals, multiple power switching boards 10 are stacked vertically. Each power switching board 10 connects multiple power supply terminals 200 and one charging terminal 300. Specifically, copper terminals can be soldered to the input terminals of the power switching boards 10 and the output terminals of the power supply terminals 200. The copper terminals on the input terminals of the power switching boards 10 and the output terminals of the power supply terminals 200 are soldered through a first connecting conductor 30, thereby connecting multiple power switching boards 10 so that the same power supply terminal 200 can provide power to different charging terminals. The first connecting conductor 30 is a metal strip or plate with good conductivity. Its shape and size are designed according to the specific stacking requirements and the layout of the power switching boards 10; for example, it can be a copper busbar. The number of first connecting conductors 30 is determined by the number of output terminals of the power switching boards 10, and multiple parallel power switching boards 10 can accommodate different numbers of power supply terminals 200.
[0051] In another application scenario, multiple power switching boards 10 can be used to meet the charging demand of the same charging terminal 300, and the multiple power switching boards 10 are stacked in the vertical direction. The input ends of the multiple power switching boards 10 connected to the same power supply end 200 are connected by the first connecting conductor 30, the other end of the first connecting conductor 30 is connected to the corresponding power supply end 200, and the multiple power switching boards 10 are arranged in the length direction of the first connecting conductor 30; at the same time, the output end of each power switching board 10 is connected to the second end of the multiple power switches K, and the output ends of the multiple power switching boards 10 are connected by the second connecting conductor (not shown in the figure), and the other end of the second connecting conductor is connected to the corresponding charging terminal 300. The second connecting conductor is arranged in parallel with the first connecting conductor 30.
[0052] In the above scheme, the stacked structure allows the number of power switching boards 10 to be flexibly adjusted according to actual needs, facilitating system expansion and upgrading; using the first connecting conductor 30 for welding connection can simplify the wiring process.
[0053] In some embodiments, the control end of each power switching board 10 can be connected using a wire-to-board connector, which is a component specially used for quickly and reliably connecting a cable with a circuit board (or a board card). The entire control wiring is connected by plugging, forming a complete control loop. In the above scheme, this plugging connection method not only simplifies the wiring process, but also improves the flexibility and maintainability of the wiring.
[0054] Referring to Figure 4 , Figure 4 is a structural schematic diagram of a first embodiment of a charging system provided by the present application. The charging system 1000 includes multiple power supply ends 200 and a power switching device 100, and the power switching device 100 is the power switching device 100 as described above.
[0055] Referring to Figure 5 , Figure 5 is a structural schematic diagram of a second embodiment of a charging system provided by the present application. The charging system 1000 includes multiple power supply ends 200 and a power switching device 100, and the power switching device 100 is the power switching device 100 as described above.
[0056] In some embodiments, each power supply end 200 includes a conversion module 210, the first end of the conversion module 210 is coupled to a busbar, and the second end of the conversion module 210 is coupled to the input end of each power switching board 10.
[0057] Specifically, the conversion module 210 includes an AC-DC converter (not shown in the figure) connected to the input end of the bus and the power switching board 10, for converting the alternating current of the bus into direct current, and can further include a filter and voltage stabilizing unit (not shown in the figure) and a first protection unit (not shown in the figure), for filtering out the noise and interference in the electric energy, ensuring the stability of the output voltage, and preventing the abnormal voltage and current from damaging the charging system 1000.
[0058] In some embodiments, the charging system 1000 further includes a plurality of charging connection modules 400, the first end of each charging connection module 400 being coupled to the output end of the corresponding power switching board 10, and the second end of each charging connection module 400 being used for coupling to the charging terminal 300.
[0059] Specifically, the charging connection module 400 is used for directly transmitting the direct current output by the power switching board 10 to the charging terminal 300, and includes a communication unit (not shown in the figure) and a second protection unit (not shown in the figure). The communication unit is connected to the output end of the power switching board 10 and the charging terminal 300, and is used for communicating with the battery management system of the charging terminal 300, so as to realize intelligent charging control, such as automatically adjusting the charging power according to the power of the charging terminal 300, the charging demand, and the load condition of the power grid; the second protection unit is connected to the output end of the power switching board 10 and the charging terminal 300, and is used for realizing overload protection, short-circuit protection and the like, so as to improve the safety of the charging process.
[0060] One of the technical solutions adopted in the present application is to provide a power switching device, which includes a plurality of power switching boards, the input end of each power switching board being used for coupling to at least two power supply ends, and the output end of each power switching board being used for coupling to a charging terminal; wherein a plurality of power switches are arranged on each power switching board, the first end of each power switch being connected to at least one power supply end through the input end, the second end of the plurality of power switches being connected to the charging terminal through the output end, and the control end of each power switch being connected to the control end of the power switching board. In the above manner, the power switching module is designed on board, a different number of power switches can be arranged through the power switching board, or a plurality of power switching boards are connected in parallel to meet the access of different numbers of charging modules, so as to simplify the circuit design, reduce the maintenance difficulty and cost, and improve the reliability and expansibility of the circuit.
[0061] In the several embodiments provided in the present application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device embodiments described above are only schematic. The division of the modules or units is only a logical function division. There can be another division manner in actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed.
[0062] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, i.e., may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the present embodiment scheme.
[0063] In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The integrated unit can be realized in the form of hardware or in the form of a software functional unit.
[0064] The above is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.
Claims
1. A power switching device, characterized by, The power switching device comprises: a plurality of power switching boards, an input end of each of the power switching boards being used for coupling at least two power supply ends, and an output end of each of the power switching boards being used for coupling a charging terminal; wherein a plurality of power switches are arranged on each of the power switching boards, a first end of each of the power switches being connected to at least one of the power supply ends through the input end, a second end of the plurality of power switches being connected to the charging terminal through the output end, and a control end of each of the power switches being connected to a control end of the power switching board.
2. The power switching device of claim 1, wherein, The power switching device further comprises: a control module, an input end of the control module being connected to each of the power supply ends and each of the charging terminals, and an output end of the control module being connected to the control end of each of the power switching boards.
3. The power switching device of claim 2, wherein, The control module comprises a detection unit, the detection unit being connected to a feedback end of each of the power switching boards.
4. The power switching device of claim 3, wherein, The feedback end of each of the power switching boards is connected to each of the power switches.
5. The power switching device of claim 1, wherein, Each of the power switching boards comprises a plurality of input ends, each of the input ends being connected to the first end of one of the power switches; the input ends connected to the same power supply end in the plurality of power switching boards are connected through a first connecting conductor, the other end of the first connecting conductor being connected to the corresponding power supply end.
6. The power switching device of claim 5, wherein, The plurality of power switching boards are arranged in a hierarchical manner in the length direction of the first connecting conductor.
7. The power switching device of claim 1, wherein, The power switches are magnetic latching relays.
8. A charging system characterized by, The charging system comprises a plurality of power supply ends and a power switching device; the power switching device is the power switching device according to any one of claims 1-7.
9. The charging system of claim 8, wherein, Each of the power supply ends comprises a conversion module, a first end of the conversion module being coupled to a busbar, and a second end of the conversion module being coupled to the input end of each of the power switching boards.
10. The charging system of claim 8, wherein, The charging system further comprises: a plurality of charging connection modules, a first end of each of the charging connection modules being coupled to the output end of the corresponding power switching board, and a second end of each of the charging connection modules being coupled to the charging terminal.