Charging circuit and charging equipment

Abstract

The embodiment of the utility model relates to the technical field of charging piles, in particular to a charging circuit and charging equipment. The charging circuit comprises a power output module and a convergence module. The power output module is used for outputting at least one charging power supply, and the power output module can adjust the power of each charging power supply. And the confluence module is electrically connected with the at least two power supply output modules and is used for connecting one charging power supply of each connected power supply output module in parallel to obtain a target charging power supply. According to the charging circuit provided by the embodiment of the utility model, the power supply output modules which are mutually independent are connected in parallel through the confluence module so as to superpose the charging power supplies output by the power supply output modules, so that a target charging power supply with higher power is obtained, and the charging requirement of a high-power charging vehicle is further met.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of charging piles, and in particular to a charging circuit and a charging device. Background Art

[0002] Currently, a charging device typically has multiple charging hosts, each of which corresponds to multiple charging outputs (charging guns). Each charging host can control the charging power of the charging output through an internal switch matrix unit. However, each charging host is independent of each other, and the power output of a single charging host is very limited, making it difficult to meet higher charging power requirements. Utility Model Content

[0003] One purpose of the embodiments of the present invention is to provide a charging circuit and a charging device to solve the technical problem that existing charging devices are difficult to meet higher charging power requirements.

[0004] In one aspect, an embodiment of the present invention provides a charging circuit, comprising:

[0005] A power output module, configured to output at least one charging power source, and capable of adjusting the power of each charging power source; and

[0006] A confluence module is electrically connected to at least two of the power output modules, and is used to connect one of the charging power sources of each of the connected power output modules in parallel to obtain a target charging power source.

[0007] Optionally, the number of the confluence modules is at least two, and the power output modules connected to the confluence modules are different.

[0008] Optionally, at least two of the confluence modules are respectively connected to at least one common power output module, and are respectively connected to different charging power sources in the common power output module.

[0009] Optionally, the power output modules connected to at least two of the confluence modules are all common power output modules.

[0010] Optionally, the confluence module is connected to each of the power output modules respectively.

[0011] Optionally, the power output module includes:

[0012] at least two power units, each of the power units being configured to output a power supply having a preset supply power value;

[0013] a switch matrix unit, the switch matrix unit comprising at least two front-stage switches connected in parallel, each of the front-stage switches being connected to one of the power units, and the power units connected to the front-stage switches being different; and

[0014] a first control unit, electrically connected to the switch matrix unit, configured to obtain a first switching signal and control the switch matrix unit to close the corresponding preceding switch according to the first switching signal, so as to enable the corresponding power unit;

[0015] The first switching signal matches the power of the charging power source output by the switch matrix unit.

[0016] Optionally, the number of the switch matrix units is at least two, and the front-stage switches of each switch matrix unit are respectively assigned switch numbers, and the front-stage switches with the same switch number but belonging to different switch matrix units are connected to the bus of the same power unit.

[0017] Optionally, the confluence module includes:

[0018] busbars;

[0019] at least two subsequent switches, the input end of each subsequent switch being electrically connected to one of the power output modules and connected to one of the charging power sources, the power output modules connected to the subsequent switches being different, and the output ends of the subsequent switches on the same bus module being respectively connected to the busbars, and

[0020] The second control unit is connected to each of the subsequent switches, and is used to obtain a second switching signal and control each of the subsequent switches to perform a switching operation according to the second switching signal.

[0021] Optionally, the subsequent switch is a contactor.

[0022] In another aspect, an embodiment of the present invention provides a charging device, comprising:

[0023] A charging power supply cabinet, comprising a charging host configured to output at least one charging power source; and

[0024] Charging terminals, each of which includes at least one charging gun, and at least one of which further includes a confluence module, each of which is connected to one of the charging guns and at least two of the charging hosts, the confluence module being configured to connect one of the charging power sources of each of the connected charging hosts in parallel to output a target charging power source to the connected charging gun;

[0025] The charging terminal and the charging power supply cabinet together constitute a charging circuit as described in any one of the above items.

[0026] The embodiment of the present invention can achieve the following technical effects: the charging circuit of the embodiment of the present invention adopts a confluence module to connect the independent power output modules in parallel to superimpose the charging power output by each power output module, thereby obtaining a target charging power with higher power, thereby meeting the charging needs of high-power charging electric vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] One or several embodiments are exemplarily illustrated by the pictures in the corresponding drawings. These exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0028] Figure 1 A first principle block diagram of a charging circuit provided by an embodiment of the utility model;

[0029] Figure 2 A second principle block diagram of a charging circuit provided by an embodiment of the present utility model;

[0030] Figure 3 A third principle block diagram of a charging circuit provided by an embodiment of the present utility model;

[0031] Figure 4 A fourth principle block diagram of a charging circuit provided by an embodiment of the present utility model;

[0032] Figure 5 A block diagram of a power output module of a charging circuit provided by an embodiment of the present utility model;

[0033] Figure 6 A circuit principle block diagram between a power unit and a switch matrix unit of a power output module provided by an embodiment of the present utility model;

[0034] Figure 7 A circuit principle block diagram between each power output module and the confluence module of a charging circuit provided by an embodiment of the utility model;

[0035] Figure 8 This is a circuit principle block diagram of a charging device provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly on the other element, or there can be one or more centered elements therebetween. The terms "upper", "lower", "left", "right", "upper end", "lower end", "top" and "bottom" used in this specification indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second" and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0037] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0038] See also Figure 1 In one aspect, an embodiment of the present invention provides a charging circuit 100a, which is applied to a charging device. In some embodiments, the charging device is a charging device for charging electric vehicles.

[0039] The charging equipment includes a charging power supply cabinet 20 and charging terminals 40. The charging power supply cabinet 20 includes charging units, each of which is configured to output at least one charging power source. Each charging terminal 40 includes at least one charging gun 44. At least one charging terminal 40 also includes a bus module 42. Each bus module 42 is connected to a charging gun 44 and at least two charging units. The bus module 42 connects one of the charging power sources of each connected charging unit in parallel to output the target charging power source to the connected charging gun 44.

[0040] In some embodiments, the charging circuit 100a includes a power output module 22a and a bus module 42. The power output module 22a is configured to output at least one charging power source, and the power output module 22a is capable of adjusting the power level of each charging power source. The bus module 42 is electrically connected to at least two power output modules 22a, and is configured to connect one charging power source from each connected power output module 22a in parallel to obtain a target charging power source.

[0041] In some embodiments, the power output module 22 a is a functional module of a charging host, and the confluence module 42 is a functional module of at least one charging terminal 40 .

[0042] The operating principles of the charging circuit 100a of the present embodiment are as follows: First, the charging power outputs of each power output module 22a are independent of each other. When a power output module 22a outputs at least two charging power sources, one of the charging power sources can be connected to the bus module 42, while the other charging power sources can be directly supplied to other charging guns 44 to meet the charging needs of low-power electric vehicles. Second, the power output module 22a can output at least one charging power source. The bus module 42 can obtain at least two charging power sources from at least two power output modules 22a, and combine the power of the two charging power sources in parallel to output a higher-power target charging power source. This is then supplied to the high-power charging gun 44 to meet the charging needs of high-power electric vehicles. Third, the power of each charging power source output by the power output module 22a is adjustable. By increasing the power of the charging power source connected to the bus module 42, the power output module 22a can increase the power of the target charging power source output by the bus module 42.

[0043] It can be understood that the charging circuit 100a of the embodiment of the present invention adopts a confluence module 42 to connect the independent power output modules 22a in parallel to superimpose the charging power output by each power output module 22a, thereby obtaining a target charging power with higher power, thereby meeting the charging needs of high-power charging electric vehicles.

[0044] In one embodiment, for example, one of the confluence modules 42 is connected to three power output modules 22a respectively, and each power output module 22a can output 480kw of charging power to the confluence component, and after confluence by the confluence module 42, a target charging power of 1440kw can be output.

[0045] See also Figure 2 In some embodiments, the number of the confluence modules 42 is at least two, and the power output modules 22 a connected to each confluence module 42 are different.

[0046] It can be understood that since the maximum power output that each power output module 22a can provide is fixed, each convergence module 42 is configured to connect to a different power output module 22a. Then, each convergence module 42 can obtain the maximum power charging power from the corresponding power output module 22a, and the target charging power output by each convergence module 42 does not affect each other, which is conducive to providing higher power charging power for charging electric vehicles.

[0047] See also Figure 3 In some embodiments, at least two confluence modules 42 are respectively connected to at least one common power output module 22 a and are respectively connected to different charging power sources in the common power output module 22 a.

[0048] As will be appreciated, there are at least two bus modules 42, both connected to the same power output module 22a. However, each bus module 42 receives a different charging power source provided by the power output module 22a. When one bus module 42 is using one of the charging power sources from the power output module 22a, the remaining idle charging power source can be utilized by the other bus modules 42. This helps improve the charging power utilization efficiency of the power output module 22a by the charging terminal 40 and ensures the structural diversity of the charging circuit 100a.

[0049] See also Figure 4 In some embodiments, the power output modules 22 a connected to at least two converging modules 42 are all common power output modules 22 a.

[0050] It is understood that there are at least two bus modules 42, each of which is connected to a group of power output modules 22a, which are shared by all bus modules 42. Through this arrangement, the embodiment of the present invention can establish an association between the bus modules 42 through the group of power output modules 22a, while allowing each bus module 42 to utilize more power output modules 22a.

[0051] In one embodiment, for example, two converging modules 42 are respectively connected to three common power output modules 22a, where each power output module 22a can output a maximum of 480 kW of charging power. The three power output modules 22a respectively distribute 360 ​​kW, 240 kW, and 240 kW of charging power to one converging module 42, resulting in a target charging power output of 840 kW after converging through the converging module 42. Similarly, the three power output modules 22a respectively distribute 120 kW, 240 kW, and 240 kW of charging power to another converging module 42, resulting in a target charging power output of 600 kW after converging through the converging module 42.

[0052] In some embodiments, the confluence module 42 is connected to each power output module 22 a respectively.

[0053] It can be understood that the confluence module 42 is respectively connected to all the power output modules 22a, that is, the confluence module 42 can obtain charging power from more power output modules 22a, and when each power output module 22a outputs the maximum power charging power to the same confluence module 42, the power of the target charging power obtained by the confluence module 42 is the sum of the maximum power charging power of each power output module 22a. Through the above setting, the embodiment of the present invention can enable the confluence module 42 to output a higher power target charging power.

[0054] See also Figure 5 In some embodiments, the power output module 22a includes at least two power units 222, a switch matrix unit 224, and a first control unit 226. Each power unit 222 is configured to output power having a preset supply value. The switch matrix unit 224 includes at least two front-stage switches connected in parallel, each front-stage switch being connected to a power unit 222, and each front-stage switch being connected to a different power unit 222. The first control unit 226 is electrically connected to the switch matrix unit 224 and configured to obtain a first switching signal and control the switch matrix unit 224 to close the corresponding front-stage switch based on the first switching signal to enable the corresponding power unit 222. The first switching signal matches the power level of the charging power output by the switch matrix unit 224.

[0055] In an embodiment of the present invention, the external power supply is converted into various power units 222 after passing through the voltage transformation, voltage division and other functional modules of the charging power cabinet 20. The power units 222 in each power output module 22a are distributed through the switch matrix unit 224. Each power unit 222 can output power of a preset supply value. For example, the preset power supply value is 40kw. In other embodiments, the preset power supply value can be configured by the designer according to actual business needs, and there is no restriction here.

[0056] The first control unit 226 is a functional unit in the charging host control system. In one embodiment, the charging host control system includes a device controller and the first control unit 226. The first control unit 226 is a switch controller. Each switch matrix unit 224 is connected to a corresponding switch controller and is controlled by the switch controller. Each switch controller is also connected to the device controller. The output of each switch matrix unit 224 is directly connected to the charging plug 44 of the charging terminal 40 or connected to the charging plug 44 of the charging terminal 40 through the bus module 42. Exemplarily, the device controller receives power allocation instructions from the previous terminal controller (the terminal controller of the charging terminal 40) or the previous terminal controller (the charging power cabinet 20 or the terminal controller of the charging host). The power allocation instructions are used to instruct the charging host to allocate a specified power to the charging terminal 40. The device controller generates a switching signal based on the power allocation instruction. Based on the switching signal, the switch controller controls the switch matrix unit 224 to close the corresponding previous switch, thereby enabling the corresponding power unit 222, thereby causing the switch matrix unit 224 to output charging power at the specified power.

[0057] It should be noted that either the device controller or the switch controller can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, a single-chip microcomputer, an ARM or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components. Furthermore, either the device controller or the switch controller can be any combination of conventional processors, controllers, microcontrollers, or state machines, such as a combination of an FPGA and a microprocessor, or a combination of multiple microprocessors. Furthermore, the pre-stage switch can be at least one of a contactor, a circuit breaker, or other switching device. In some embodiments, switching devices of the same type or type can be used to reduce the number of device types and the difficulty of setup.

[0058] In some embodiments, the number of switch matrix units 224 is at least two, and each front-stage switch of each switch matrix unit 224 is assigned a switch number respectively. The front-stage switches with the same switch number but belonging to different switch matrix units 224 are connected to the bus of the same power unit 222.

[0059] See also Figure 6 , the embodiment of the present invention assigns a switch number to each front-stage switch, and connects the front-stage switches with the same switch number to the bus of the same power unit 222. For example, the number of switch matrix units 224 in each power output module 22a is 3, and the number of front-stage switches in each switch matrix unit 224 is 6, which are respectively assigned switch numbers 1 to switch numbers 6. The number of power units 222 in each power output module 22a is 6, which are respectively assigned power numbers 1 to power numbers 6. Among them, all switches with switch number 1 in any power output module 22a are electrically connected to the power unit 222 with power number 1 in the same power output module 22a, and so on, until the following is formed. Figure 6 In addition, the front-stage switches with the same switch number and belonging to different switch matrix units 224 cannot be turned on at the same time to avoid short circuit.

[0060] It can be understood that the embodiment of the present invention, through the above-mentioned configuration, enables the power size of the target charging power source to be adjusted in the front stage of the charging circuit 100a, wherein each power unit 222 is independent of each other, and each switch matrix switch unit can select each power unit 222. The charging circuit 100a can easily distribute power according to the various charging requirements on the charging terminal 40, and is conducive to avoiding the idle power units 222 from being fully utilized.

[0061] See also Figure 7In some embodiments, the bus module 42 includes a bus bar 422, at least two subsequent switches 424, and a second control unit 426. The input end of each subsequent switch 424 is electrically connected to one of the power output modules 22a and connected to one of the charging power sources. Each subsequent switch 424 is connected to a different power output module 22a, and the output end of each subsequent switch 424 on the same bus module 42 is respectively connected to the bus bar 422. The second control unit 426 is respectively connected to each subsequent switch 424, and is configured to obtain a second switching signal and control each subsequent switch 424 to perform a switching operation based on the second switching signal.

[0062] The output ends of all the subsequent switches 424 on the same bus module 42 are connected in parallel via a bus member 422 . The bus member 422 is a bus copper bar or a conductive component that connects the power output modules 22 a in parallel.

[0063] The confluence module 42 of the present embodiment is provided with a subsequent switch 424 along its power transmission path to facilitate selection of each power output module 22a, facilitating control of the output of the confluence module 42 at the subsequent stage of the charging circuit 100a. It is understood that the power of the target charging power output by the confluence module 42 is the sum of the output powers of the connected power output modules 22a. When the power demand of the charging terminal 40 is high, the subsequent switches 424 can be closed to meet the high power demand of the charging terminal 40. When the power demand of the charging terminal 40 is low, some of the subsequent switches 424 can be opened to reduce the power of the target charging power. Alternatively, when charging an electric vehicle, if the charging terminal 40 detects a charging fault (e.g., overcurrent, overvoltage, etc.), the subsequent switches 424 can be directly controlled to open to prevent damage to the electric vehicle.

[0064] The second control unit 426 is a functional unit in the control system of the charging terminal 40. In one embodiment, the control system of the charging terminal 40 includes a terminal controller of the charging terminal 40 and a second control unit 426. The second control unit 426 is another switch controller. All subsequent switches 424 in each bus module 42 are connected to and controlled by a corresponding switch controller. Each switch controller is also connected to the terminal controller of the charging terminal 40. Exemplarily, the terminal controller sends a second switching signal to the switch controller, which instructs the bus module 42 to switch on or off the corresponding power output module 22a. The switch controller controls the corresponding subsequent switch 424 to perform switching operations based on the second switching signal.

[0065] It should be noted that either the terminal controller or the switch controller can be a general-purpose processor, a digital signal processor, an application-specific integrated circuit, a field-programmable gate array, a single-chip microcomputer, an ARM or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination of these components. Furthermore, either the terminal controller or the switch controller can be any combination of conventional processors, controllers, microcontrollers, or state machines, such as a combination of an FPGA and a microprocessor, or a combination of multiple microprocessors.

[0066] In some embodiments, the subsequent switch 424 may be at least one of a contactor, a circuit breaker, and other types of switch devices. In some embodiments, the same type of switch devices or the same type of switch devices may be used to reduce the number of device types and the difficulty of setting.

[0067] See also Figure 8 On the other hand, an embodiment of the present invention provides a charging device 100, which includes a charging power supply cabinet 20 and a charging terminal 40. The charging power supply cabinet 20 includes a charging host 22, which is configured to output at least one charging power source. Each charging terminal 40 includes at least one charging gun 44. At least one charging terminal 40 also includes a bus module 42. Each bus module 42 is connected to a charging gun 44 and at least two charging hosts 22. The bus module 42 is configured to connect one charging power source of each connected charging host 22 in parallel to output the target charging power source to the connected charging gun 44. The charging terminal 40 and the charging power supply cabinet 20 together constitute the charging circuit described above.

[0068] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as above, which are not provided in detail for the sake of simplicity. Although the present invention is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A charging circuit, characterized in that: include: A power output module, configured to output at least one charging power source, and capable of adjusting the power of each charging power source; as well as A confluence module is electrically connected to at least two of the power output modules, and is used to connect one of the charging power sources of each of the connected power output modules in parallel to obtain a target charging power source.

2. The charging circuit according to claim 1, wherein: The number of the confluence modules is at least two, and the power output modules connected to the confluence modules are different.

3. The charging circuit according to claim 1, wherein: At least two of the confluence modules are respectively connected to at least one common power output module, and are respectively connected to different charging power sources in the common power output module.

4. The charging circuit according to claim 3, wherein: The power output modules connected to at least two of the confluence modules are all common power output modules.

5. The charging circuit according to claim 1, wherein: The confluence modules are respectively connected to the power output modules.

6. The charging circuit according to claim 1, wherein: The power output module includes: at least two power units, each of the power units being configured to output a power supply having a preset supply power value; a switch matrix unit, the switch matrix unit comprising at least two front-stage switches connected in parallel, each of the front-stage switches being connected to one of the power units, and the power units connected to the front-stage switches being different; and a first control unit, electrically connected to the switch matrix unit, configured to obtain a first switching signal and control the switch matrix unit to close the corresponding preceding switch according to the first switching signal, so as to enable the corresponding power unit; The first switching signal matches the power of the charging power source output by the switch matrix unit.

7. The charging circuit according to claim 6, wherein: The number of the switch matrix units is at least two, and each of the front-stage switches of each switch matrix unit is assigned a switch number respectively. The front-stage switches with the same switch number but belonging to different switch matrix units are connected to the bus of the same power unit.

8. The charging circuit according to claim 1, wherein: The confluence module includes: busbars; at least two subsequent switches, the input end of each subsequent switch being electrically connected to one of the power output modules and connected to one of the charging power sources, the power output modules connected to the subsequent switches being different, and the output ends of the subsequent switches on the same bus module being respectively connected to the busbars, and The second control unit is connected to each of the subsequent switches, and is used to obtain a second switching signal and control each of the subsequent switches to perform a switching operation according to the second switching signal.

9. The charging circuit according to claim 8, characterized in that: The subsequent switch is a contactor.

10. A charging device, characterized in that: include: A charging power supply cabinet, comprising a charging host configured to output at least one charging power source; as well as Charging terminals, each of which includes at least one charging gun, and at least one of which further includes a confluence module, each of which is connected to one of the charging guns and at least two of the charging hosts, the confluence module being configured to connect one of the charging power sources of each of the connected charging hosts in parallel to output a target charging power source to the connected charging gun; The charging terminal and the charging power supply cabinet together constitute the charging circuit as described in any one of claims 1 to 9.

Images