Power module and charging device
By designing multiple charging interfaces and dynamically allocating power, the limitations of existing power modules in terms of flexibility and adaptability are overcome, enabling more efficient charging management and meeting the needs of multiple charging interfaces and high power.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XFUSION DIGITAL TECH CO LTD
- Filing Date
- 2025-06-23
- Publication Date
- 2026-07-21
AI Technical Summary
Existing power modules have limitations in terms of power allocation flexibility and adaptability, and cannot meet the flexible adjustment of multiple charging interfaces and high power requirements, resulting in low charging efficiency.
It adopts a multi-channel charging interface design, which realizes independent output of multiple charging interfaces through the combination of DC bus, voltage conversion module and switch, and improves power supply quality through power factor correction module. The controller dynamically adjusts the switch state to freely allocate the power of each charging interface.
It improves the stability and flexibility of the power module, enhances its adaptability to different charging needs, and improves charging efficiency and system reliability.
Smart Images
Figure CN224537843U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of charging technology, and in particular to a power module and charging device. Background Technology
[0002] In some technical solutions, the power module typically uses a single charging interface for independent power supply, meaning that a power module can only provide power to one charging interface at a time.
[0003] The above technical solution can meet charging needs when the power module output power is low and the number of charging interfaces is limited. However, with the continuous growth of various charging needs, the power module has significant limitations in terms of power distribution flexibility and adaptability. Utility Model Content
[0004] This application provides a power module and a charging device. The technical solution provided by this application not only improves the stability and flexibility of the power module, but also enhances its adaptability to different charging needs.
[0005] In a first aspect, embodiments of this application provide a power module, including a DC bus, multiple voltage conversion modules and multiple switches, with different voltage conversion modules corresponding to different charging interfaces.
[0006] The DC bus is used to provide DC voltage.
[0007] The first end of the voltage conversion module is connected to the DC bus, and the second end of the voltage conversion module is connected to the corresponding charging interface of the voltage conversion module.
[0008] The multiple switches include multiple first switches and multiple second switches; the first switches are disposed between the second terminal of the voltage conversion module and the charging interface corresponding to the voltage conversion module; the second switches are disposed between the second terminals of different voltage conversion modules.
[0009] The power module provided in this embodiment can realize independent output of multiple charging interfaces and freely adjust the power of each charging interface. This not only improves the stability and flexibility of the power module, but also enhances the adaptability of the power module to different charging needs, and also helps to improve the charging efficiency of the power module.
[0010] In one possible implementation, the power module further includes a power factor correction module; the first end of the power factor correction module is connected to the power supply, and the second end of the power factor correction module is connected to the DC bus.
[0011] This implementation method can improve the power supply quality, reduce system failures and equipment damage caused by low power factor and harmonic interference, and ensure the normal operation of the power supply module.
[0012] In one possible implementation, the power factor correction module includes a three-phase power factor correction (PFC) circuit.
[0013] This implementation method enables the achievement of a higher power factor and lower harmonic content, thereby reducing energy consumption and improving power supply efficiency.
[0014] In one possible implementation, the power module further includes a controller for controlling any one or more of the multiple switches to open or close.
[0015] This implementation allows for dynamic adjustment of the output power of each charging interface by controlling one or more of the multiple switches to open or close.
[0016] In one possible implementation, in the first operating mode, the controller is used to:
[0017] Control each first switch to close and control each second switch to open; wherein, in the first working mode, the output power of each charging interface is the same.
[0018] In one possible implementation, the plurality of voltage conversion modules includes a first voltage conversion module, and in a second operating mode, the controller is configured to:
[0019] The first switch connected to the first voltage conversion module is closed;
[0020] The second switch controlling the connection between the first voltage conversion module and at least one other voltage conversion module is closed;
[0021] The first switch connected to at least one voltage conversion module other than the first voltage conversion module is disconnected.
[0022] In the second operating mode, the output power of the charging interface corresponding to the first voltage conversion module is greater than P1, where P1 = P / n, P represents the total output power of the DC bus, and n represents the number of charging interfaces.
[0023] In one possible implementation, the plurality of voltage conversion modules includes a first voltage conversion module, and in a third operating mode, the controller is configured to:
[0024] The first switch connected to the first voltage conversion module is closed;
[0025] The control switches connected to the first voltage conversion module are disconnected;
[0026] In the third working mode, the output power of the charging interface corresponding to the first voltage conversion module is less than P1, where P1 = P / n, P represents the total output power of the DC bus, and n represents the number of charging interfaces.
[0027] Through the above implementation method, independent output of multiple charging interfaces can be achieved, and the power of each charging interface can be freely allocated. This not only improves the stability and flexibility of the power module, but also enhances the power module's adaptability to the charging needs of different charging interfaces.
[0028] In one possible implementation, the controller is connected to a charging interface and / or a voltage conversion module, and the controller is also used for:
[0029] Monitor the output power of each charging port and / or adjust the output power of the voltage conversion module.
[0030] This implementation method allows for adjusting the output power of the voltage conversion module based on the output power of the charging interface, thereby better meeting the charging needs of each charging interface.
[0031] In one possible implementation, the voltage conversion module includes a direct current-to-direct current (DC-DC) conversion circuit.
[0032] Through the above implementation methods, the voltage conversion module can achieve functions such as boosting and bucking.
[0033] Secondly, embodiments of this application provide a charging device that includes a power module as provided in the first aspect. Attached Figure Description
[0034] Figure 1 This is a schematic diagram of the structure of a power module provided in an embodiment of this application;
[0035] Figure 2 This is a schematic diagram of another power module provided in the embodiments of this application;
[0036] Figure 3 This is a schematic diagram of another power module provided in the embodiments of this application.
[0037] Figure label:
[0038] 100: Power supply module;
[0039] 110: DC bus;
[0040] 120: Voltage conversion module;
[0041] 130: Charging port;
[0042] 140: Power factor correction module;
[0043] 150: Controller. Detailed Implementation
[0044] Exemplary embodiments of this application will be described in detail below. When the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.
[0045] To facilitate a clear description of the technical solutions in the embodiments of this application, terms such as "exemplary" and "for example" are used to indicate that they are examples, illustrations, or descriptions. Any embodiment or design scheme described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.
[0046] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.
[0047] To facilitate a clear description of the technical solutions in the embodiments of this application, some terms and technologies involved in the embodiments of this application are briefly introduced below:
[0048] 1. Power Module
[0049] A module that converts input alternating current (AC) or direct current (DC) into DC current with specific voltage and current specifications.
[0050] 2. Power factor correction (PFC)
[0051] A technique for improving the power factor (approaching 1) and reducing reactive power during AC-DC conversion by controlling the input current waveform to be in phase with the voltage waveform.
[0052] 3. DC Bus
[0053] A common transmission line connecting multiple DC devices (such as power modules, loads, and energy storage units) for centralized distribution of DC power.
[0054] 4. DC-DC Converter
[0055] An electronic device that converts one DC voltage to another, enabling boost, buck, or buck-boost.
[0056] In related technologies, power modules are primarily based on a single charging interface output, meaning that a single power module can only provide power to one charging interface at a time. This design can meet charging needs when the power module output power is low and the number of charging interfaces is limited. However, as users' diverse charging needs continue to grow, the aforementioned power modules face significant limitations in terms of power distribution flexibility and adaptability. For example:
[0057] (1) The power allocation granularity is too large: Since a single power module can only provide power to one charging interface, the overall power allocation granularity is too large, and it cannot be finely managed according to the needs of different charging interfaces.
[0058] (2) Poor flexibility and adaptability: It is not adaptable to scenarios with multiple charging ports and high power requirements. For example, if a certain charging port needs higher output power, while other charging ports do not need higher output power for the time being, it cannot be flexibly adjusted.
[0059] (3) Low charging efficiency: Because power cannot be allocated according to actual needs, some power may be wasted or the charging efficiency may be low.
[0060] To address the aforementioned issues, this application provides a power module that enables independent output from multiple charging interfaces and allows for free allocation of power across each interface. This not only improves the stability and flexibility of the power module but also enhances its adaptability to different charging demands and improves its charging efficiency.
[0061] The power module provided in this application embodiment will be described in detail below through specific implementation methods. It should be noted that the following embodiments can exist independently or in combination with each other, and the same or similar content will not be described again in different embodiments.
[0062] Reference Figure 1 , Figure 1 This is a schematic diagram of a power module provided in an embodiment of this application. In some embodiments, the power module 100 includes a DC bus 110, multiple voltage conversion modules 120, and multiple switches, with different voltage conversion modules corresponding to different charging interfaces 130.
[0063] For example, such as Figure 1 As shown, the aforementioned multiple voltage conversion modules 120 include voltage conversion module A and voltage conversion module B; voltage conversion module A is provided with a charging interface A, and voltage conversion module B is provided with a charging interface B; the aforementioned multiple switches include S1, S2, S3, S4, S5, and S6.
[0064] In some embodiments, the DC bus 110 is used to provide a stable and reliable DC voltage.
[0065] The first end of the voltage conversion module 120 is connected to the DC bus 110, and the second end of the voltage conversion module 120 is connected to the charging interface 130 corresponding to the voltage conversion module 120.
[0066] For example, such as Figure 1 As shown, the first end (including INA+ and INA-) of voltage conversion module A is connected to DC bus 110, and the second end (including OUTA+ and OUTA-) of voltage conversion module A is connected to charging interface A; the first end (including INB+ and INB-) of voltage conversion module B is connected to DC bus 110, and the second end (including OUTB+ and OUTB-) of voltage conversion module B is connected to charging interface B.
[0067] The aforementioned multiple switches include multiple first switches and multiple second switches; the first switches are disposed between the second terminal of the voltage conversion module 120 and the charging interface 130 corresponding to the voltage conversion module; the second switches are disposed between the second terminals of different voltage conversion modules 120.
[0068] For example, such as Figure 1 As shown, the aforementioned multiple switches include multiple first switches, namely S1, S2, S3, and S4. Among them, S1 and S2 are disposed between the second terminal of voltage conversion module A and charging interface A; S3 and S4 are disposed between the second terminal of voltage conversion module B and charging interface B.
[0069] The aforementioned multiple switches include multiple second switches, namely S5 and S6. S5 and S6 are located between the second terminal of voltage conversion module A and the second terminal of voltage conversion module B.
[0070] Optionally, the switch described above may be a relay, a metal-oxide-semiconductor field-effect transistor (MOSFET), or other components that can perform switching functions, and no limitation is imposed in the embodiments of this application.
[0071] Optionally, the voltage conversion module 120 may include a DC-DC conversion circuit or a DC-DC converter, which can convert the input DC voltage into a DC output of different voltages.
[0072] In some implementations, the output power of charging interface A and / or charging interface B can be dynamically adjusted by controlling any one or more of the above switches to open or close.
[0073] For example, the following example illustrates the power supply module consisting of only voltage conversion module A and voltage conversion module B:
[0074] When switches S1, S2, S3, and S4 are closed and switches S5 and S6 are open, voltage conversion module A independently supplies power to charging interface A, and voltage conversion module B independently supplies power to charging interface B. In this case, the maximum output power of charging interface A and charging interface B is less than or equal to P / 2, where P is the total output power of DC bus 110.
[0075] When the switches S1, S2, S5, and S6 are closed and the switches S3 and S4 are open, voltage conversion module A and voltage conversion module B are connected in parallel and supply power to charging interface A together. In this case, the maximum output power of charging interface A can be greater than P / 2, and charging interface B is in an idle state.
[0076] When the switches S1 and S2 are closed and the switches S3, S4, S5 and S6 are open, charging interface A supplies power independently. In this case, the maximum output power of charging interface A is less than or equal to P / 2, and charging interface B is in an idle state.
[0077] Similarly, when the switches S3, S4, S5, and S6 are closed and the switches S1 and S2 are open, voltage conversion module A and voltage conversion module B are connected in parallel and supply power to charging interface B together. In this case, the maximum output power of charging interface B can be greater than P / 2, and charging interface A is in an idle state.
[0078] When the switches S3 and S4 are closed and the switches S1, S2, S5 and S6 are open, the charging interface B supplies power independently. In this case, the maximum output power of the charging interface B is less than or equal to P / 2, and the charging interface A is in an idle state.
[0079] The power module provided in this application embodiment can achieve independent output of multiple charging interfaces by controlling multiple switches of the power module, and can freely allocate the power of each charging interface. This not only improves the stability and flexibility of the power module, but also enhances the adaptability of the power module to the charging needs of different charging interfaces, and also helps to improve the charging efficiency of the power module.
[0080] Reference Figure 2 , Figure 2 This is a schematic diagram of another power module provided in an embodiment of this application. In some embodiments, the power module 100 further includes a power factor correction module 140 and a controller 150.
[0081] In some implementations, the first terminal of the power factor correction module 140 is connected to the power supply, and the second terminal is connected to the DC bus.
[0082] Among them, the power factor correction module 140 can improve the power supply quality of the power supply, reduce system failures and equipment damage caused by low power factor and harmonic interference, and ensure the normal operation of the power supply module 100.
[0083] Optionally, the power factor correction module 140 may include a three-phase power factor correction (PFC) circuit. The three-phase PFC circuit can fully utilize the characteristics of a three-phase power supply to achieve efficient power factor correction.
[0084] Optionally, a three-phase PFC circuit can be composed of three single-phase PFC circuits, which can work in coordination with each other through a specific control strategy.
[0085] Understandably, three-phase PFC circuits can achieve higher power factors and lower harmonic content, thereby reducing energy consumption and improving power supply efficiency. Furthermore, three-phase PFC circuits can handle higher power outputs and are suitable for high-power power modules, such as electric vehicle charging stations, industrial power supplies, and large data center power supplies.
[0086] In some implementations, the controller 150 may be connected to each voltage conversion module 120 separately to adjust the output power of the voltage conversion module 120.
[0087] In some implementations, the controller 150 can be connected to each charging port 130 individually to monitor the output power of each charging port 130. For example, the controller 150 can obtain the output power of charging port A using the BMS_A interface and the output power of charging port B using the BMS_B interface.
[0088] In some implementations, the controller 150 can be used to control any one or more of the plurality of switches to open or close, thereby dynamically adjusting the output power of each charging interface.
[0089] Optionally, the controller 150 can control different switches to open or close when the power module is in different operating modes.
[0090] For example, in the first operating mode, each first switch can be controlled to close and each second switch can be controlled to open; wherein, in the first operating mode, the output power of each charging interface is the same.
[0091] In the second operating mode, taking the first voltage conversion module in the power module as an example, the system can control the first switch connected to the first voltage conversion module to close; control the second switch connecting the first voltage conversion module to at least one other voltage conversion module to close; and control the first switch connected to at least one other voltage conversion module (excluding the first voltage conversion module) to open. In this second operating mode, the output power of the charging interface corresponding to the first voltage conversion module is greater than P1, where P1 = P / n, P represents the total power output from the DC bus, and n represents the number of charging interfaces.
[0092] In the third operating mode, taking the first voltage conversion module in the power supply module as an example, the first switch connected to the first voltage conversion module can be closed, and each second switch connected to the first voltage conversion module can be opened. In this third operating mode, the output power of the charging interface corresponding to the first voltage conversion module is less than P1, where P1 = P / n, P represents the total power output from the DC bus, and n represents the number of charging interfaces.
[0093] For example, the following are examples Figure 2 Taking the power module 100 shown as an example:
[0094] In the first operating mode, switches S1, S2, S3, and S4 can be closed, and switches S5 and S6 can be opened. In this operating mode, voltage conversion module A independently supplies power to charging interface A, and voltage conversion module B independently supplies power to charging interface B; the maximum output power of both charging interface A and charging interface B can be equal to P / 2.
[0095] In the second operating mode, taking voltage conversion module A as an example, switches S1, S2, S5, and S6 can be closed, while switches S3 and S4 can be opened. In this operating mode, voltage conversion module A and voltage conversion module B are connected in parallel to supply power to charging interface A together; the maximum output power of charging interface A can be greater than P / 2, while charging interface B is in an idle state.
[0096] In the third operating mode, taking voltage conversion module A as an example, switches S1 and S2 can be closed, and switches S3, S4, S5, and S6 can be opened. In this operating mode, voltage conversion module A independently supplies power to charging interface A; the maximum output power of charging interface A can be less than P / 2.
[0097] In some embodiments, the power supply module further includes capacitors C1 and C2, which are connected in series between the positive and negative terminals of the DC bus. C1 and C2 can store and release charge, filtering out high-frequency ripple in the DC signal, making the DC voltage output to the subsequent voltage conversion module smoother and more stable, and providing high-quality DC power to subsequent circuits.
[0098] Reference Figure 3 , Figure 3 This is a schematic diagram of another power module provided in an embodiment of this application. In some embodiments, the power module 100 includes a voltage conversion module A, a voltage conversion module B, and a voltage conversion module C; voltage conversion module A is provided with a charging interface A, voltage conversion module B is provided with a charging interface B, and voltage conversion module C is provided with a charging interface C.
[0099] The aforementioned multiple switches include multiple first switches, namely S1, S2, S3, S4, S5, and S6; and multiple second switches, namely S7, S8, S9, S10, S11, and S12.
[0100] Specifically, the first switches S1 and S2 are located between the second end of the voltage conversion module A and the charging interface A; the first switches S3 and S4 are located between the second end of the voltage conversion module B and the charging interface B; and the first switches S5 and S6 are located between the second end of the voltage conversion module C and the charging interface C.
[0101] Optionally, the second switches S7 and S8 are located between the second terminal of voltage conversion module A and the second terminal of voltage conversion module B; the second switches S9 and S10 are located between the second terminal of voltage conversion module A and the second terminal of voltage conversion module C; and the second switches S11 and S12 are located between the second terminal of voltage conversion module B and the second terminal of voltage conversion module C.
[0102] For example, in the first operating mode, switches S1, S2, S3, S4, S5, and S6 can be controlled to close, and switches S7, S8, S9, S10, S11, and S12 can be controlled to open. In this operating mode, voltage conversion module A independently supplies power to charging interface A, voltage conversion module B independently supplies power to charging interface B, and voltage conversion module C independently supplies power to charging interface C; the maximum output power of charging interface A, charging interface B, and charging interface C can all be equal to P / 2.
[0103] In the second operating mode, taking voltage conversion module A as an example, switches S1, S2, S7, and S8 can be closed, and switches S3, S4, S5, S6, S9, S10, S11, and S12 can be opened. In this operating mode, voltage conversion module A and voltage conversion module B are connected in parallel and supply power to charging interface A together; the maximum output power P1 of charging interface A can satisfy 1 / 3*P < P1 < 2 / 3*P, and charging interfaces B and C are in an idle state.
[0104] Alternatively, switches S1, S2, S9, and S10 can be closed, while switches S3, S4, S5, S6, S7, S8, S11, and S12 can be opened. In this operating mode, voltage conversion module A and voltage conversion module C are connected in parallel and supply power to charging interface A together; the maximum output power P1 of charging interface A can satisfy 1 / 3*P < P1 < 2 / 3*P, and charging interfaces B and C are in an idle state.
[0105] Alternatively, switches S1, S2, S5, S6, S7, and S8 can be closed, while switches S3, S4, S9, S10, S11, and S12 can be opened. In this operating mode, voltage conversion module A and voltage conversion module B are connected in parallel and supply power to charging interface A together; the maximum output power P1 of charging interface A can satisfy 1 / 3*P < P1; voltage conversion module C supplies power to charging interface C independently, and charging interface B is in an idle state.
[0106] Alternatively, switches S1, S2, S7, S8, S9, and S10 can be closed, while switches S3, S4, S5, S6, S11, and S12 can be opened. In this operating mode, voltage conversion modules A, B, and C are connected in parallel to supply power to charging interface A. The maximum output power P1 of charging interface A can satisfy 2 / 3*P < P1, while charging interfaces B and C are in an idle state.
[0107] In the third operating mode, taking voltage conversion module A as an example, switches S1 and S2 can be closed, and switches S3, S4, S5, S6, S7, S8, S9, S10, S11, and S12 can be opened. In this operating mode, voltage conversion module A independently supplies power to charging interface A; the maximum output power P1 of charging interface A can satisfy P1 < 1 / 3 * P, and charging interfaces B and C are in an idle state.
[0108] Alternatively, switches S1, S2, S3, and S4 can be closed, while switches S5, S6, S7, S8, S9, S10, S11, and S12 can be opened. In this operating mode, voltage conversion module A independently supplies power to charging interface A, and the maximum output power P1 of charging interface A can satisfy P1 < 1 / 3 * P; voltage conversion module B independently supplies power to charging interface B, and the maximum output power P1 of charging interface B can satisfy P1 < 1 / 3 * P; charging interface C is in an idle state.
[0109] It is understood that the output power control method of charging interface B and charging interface C is the same as that of charging interface A. For details, please refer to the description in the above embodiments, which will not be repeated here.
[0110] The power module provided in this embodiment can achieve more precise and flexible power management by dynamically adjusting the output power of each voltage conversion module and the state of each switch. This design can not only meet the charging needs of various complex scenarios, but also effectively improve charging efficiency.
[0111] Optionally, the above power module can be applied to the following application scenarios:
[0112] (1) Public utility power supply system
[0113] In public places such as airports, train stations, and shopping malls, differentiated charging interfaces are provided to meet the different charging power needs of various users.
[0114] (2) Data Center
[0115] Data centers require a stable and efficient power supply for a large number of servers. Using the power modules described above, precise management can be implemented based on the actual needs of each server, improving the overall operational efficiency of the data center.
[0116] (3) Industrial production line
[0117] On industrial production lines, different machines have different power requirements. Using the power modules described above, power can be freely allocated among the machines, meeting the needs of complex production lines.
[0118] (4) Home Smart Grid
[0119] With the development of smart home technology, various devices in a home may need to be connected to the power grid. Using the aforementioned power modules, power can be freely distributed among devices within the home and managed precisely according to actual needs.
[0120] In some embodiments, this application also provides a charging device, which includes the power module described in the above embodiments. For details, please refer to the description in the above embodiments, which will not be repeated here.
[0121] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "coupled" and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal connection of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.
[0122] It is understood that the division of modules in the aforementioned computing device is merely a logical functional division. Each function can correspond to a functional module, or two or more functions can be integrated into one functional module. In actual implementation, all or some modules can be integrated into a single physical entity, or they can be distributed across different physical entities. Furthermore, depending on the specific circumstances, the aforementioned functional modules may be implemented in hardware, software, or a combination of both. Whether a function is executed in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.
[0123] The above specific embodiments further illustrate the purpose, technical solution and beneficial effects of this application. It should be understood that the above are only specific embodiments of this application and are not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of this application should be included within the scope of protection of this application.
[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of this application, and are not intended to limit them. Although the embodiments of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.
Claims
1. A power supply module, characterized in that, It includes a DC bus, multiple voltage conversion modules, and multiple switches, with different voltage conversion modules having different charging interfaces. The DC bus is used to provide DC voltage; The first end of the voltage conversion module is connected to the DC bus, and the second end of the voltage conversion module is connected to the charging interface corresponding to the voltage conversion module. The plurality of switches includes a plurality of first switches and a plurality of second switches; the first switches are disposed between the second terminal of the voltage conversion module and the charging interface corresponding to the voltage conversion module; the second switches are disposed between the second terminals of different voltage conversion modules.
2. The power module according to claim 1, characterized in that, The power module also includes a power factor correction module; the first end of the power factor correction module is connected to the power supply, and the second end of the power factor correction module is connected to the DC bus.
3. The power supply module according to claim 2, characterized in that, The power factor correction module includes a three-phase power factor correction (PFC) circuit.
4. The power module according to any one of claims 1 to 3, characterized in that, The power module also includes a controller, which is used to control any one or more of the plurality of switches to open or close.
5. The power supply module according to claim 4, characterized in that, In the first operating mode, the controller is used to: Control each of the first switches to close and control each of the second switches to open; wherein, in the first operating mode, the output power of each of the charging interfaces is the same.
6. The power supply module according to claim 4, characterized in that, The plurality of voltage conversion modules includes a first voltage conversion module. In the second operating mode, the controller is used for: The first switch connected to the first voltage conversion module is closed; The second switch controlling the connection between the first voltage conversion module and at least one other voltage conversion module is closed; The first switch connected to at least one voltage conversion module other than the first voltage conversion module is disconnected. In the second operating mode, the output power of the charging interface corresponding to the first voltage conversion module is greater than P1, where P1 = P / n, P represents the total output power of the DC bus, and n represents the number of charging interfaces.
7. The power supply module according to claim 4, characterized in that, The plurality of voltage conversion modules includes a first voltage conversion module. In the third operating mode, the controller is used to: The first switch connected to the first voltage conversion module is closed; Disconnect each of the second switches connected to the first voltage conversion module; In the third operating mode, the output power of the charging interface corresponding to the first voltage conversion module is less than P1, where P1 = P / n, P represents the total output power of the DC bus, and n represents the number of charging interfaces.
8. The power supply module according to claim 4, characterized in that, The controller is connected to the charging interface and / or the voltage conversion module, and the controller is further configured to: Monitor the output power of the charging interface and / or adjust the output power of the voltage conversion module.
9. The power supply module according to claim 4, characterized in that, The voltage conversion module includes a DC-DC-DC conversion circuit.
10. A charging device, characterized in that, The charging device includes a power module as described in any one of claims 1 to 9.