Power equipment, power supply system and vehicle

Abstract

The embodiment of the invention provides power equipment, a power supply system and a vehicle. The power equipment comprises a direct current end and a first alternating current end. The direct-current end is connected with the first battery, and the first alternating-current end is connected with the first power interface; and the power equipment is used for converting the battery voltage of the first battery into first alternating current voltage under the condition that the first signal is received, and supplying power to the first power interface through a first path between the direct current end and the first alternating current end.

Description

Power equipment, power supply systems and vehicles Technical Field

[0001] The present application relates to the field of power supply technology, and more particularly, to an electric power device, a power supply system and a vehicle. Background Art

[0002] With the development of new energy technologies, batteries are increasingly used in various electrical devices, such as mobile phones, laptops, electric vehicles, electric airplanes, electric ships, etc.

[0003] Taking electric vehicles as an example, the battery in the electric vehicle outputs direct current, which can power the motor to enable the electric vehicle to move. At the same time, the output direct current can also power other electrical devices pre-configured in the electric vehicle, such as lights, speakers, etc.

[0004] However, the above method of using the DC power output by the battery to power the electrical device is not flexible enough. For example, the battery in the electrical device cannot output AC voltage, and cannot even output DC voltage to other electrical devices that are not pre-configured.

[0005] Summary of the Invention

[0006] The present application provides an electric power device, a power supply system and a vehicle, which can solve the technical problems that the battery is not flexible enough to supply power to the load and the usage scenarios are relatively inconvenient.

[0007] In a first aspect, an embodiment of the present application provides an electric power device, comprising a DC terminal and a first AC terminal; the DC terminal is connected to a first battery, and the first AC terminal is connected to a first power interface;

[0008] The power device is used to convert the battery voltage of the first battery into a first AC voltage when receiving the first signal, and supply power to the first power interface through a first path between the DC terminal and the first AC terminal.

[0009] In the technical solution of the embodiment of the present application, the DC end of the power equipment is connected to the first battery, and the first AC end is connected to the first power interface. When the first power interface and the first battery are connected to the power equipment, the power equipment can convert the battery voltage of the first battery into a first AC voltage through inversion conversion when receiving a power-on signal, and output the first AC voltage to the first power interface. When the AC load is connected to the first power interface, the first AC voltage can power the AC load. When the first battery is used to power the load, the AC load does not need to be connected to the charging port of the first battery through a specific connecting device, but only needs to be conventionally plugged into the first power interface to be powered on and operated. This can reduce the cumbersome connection method when the first battery is used to power the AC load, and improve the flexibility and convenience of the battery powering the load.

[0010] In some embodiments, the power device further includes a second AC terminal connected to a second power interface. When a charging device is connected to the second power interface, the power device charges the first battery via a second path between the second AC terminal and the DC terminal, and also supplies power to the first power interface via a third path between the second AC terminal and the first AC terminal. By providing the second power interface, the charging device can be used to supply power to the first power interface when the charging device is connected, and the first battery can also supply power to the first load device when the first load device is connected.

[0011] In some embodiments, the power device further includes a first switch connected to the second AC terminal. When the charging device is connected to the second power interface, the power device controls the first switch to connect the second and third paths. By providing the first switch, the second and third paths can be controlled. Furthermore, when no device is connected to the second power interface, the first switch can be controlled to disconnect, thereby improving circuit safety.

[0012] In some embodiments, the power device further includes a second AC terminal connected to a second power interface. When a first load device is connected to the second power interface, the power device converts the battery voltage of the first battery into a first AC voltage, supplies power to the first power interface via a first path between the DC terminal and the first AC terminal, and supplies power to the first load device via a second path between the DC terminal and the second AC terminal. The first path and the second path can be used to supply power to the first power interface and the first load device, respectively, thereby increasing the flexibility of battery power supply.

[0013] In some embodiments, when a first load device is connected to the second power interface, the power device controls the first switch to conduct the second path. By setting the first switch to connect the DC terminal and the second AC terminal, the first switch can be controlled to conduct when the first load device is connected. When the first load device is connected to the second power interface, the first battery can output the first AC voltage to the first load device through the conducted second path to power the first load device.

[0014] In some embodiments, the power device is configured to determine that a first load device is connected to the second power interface upon receiving a connection confirmation signal and not receiving a charging guidance signal. The power device is further configured to determine that a charging device is connected to the second power interface upon receiving both a connection confirmation signal and a charging guidance signal. By identifying the connection confirmation signal and the charging guidance signal, it is possible to determine, based on the received signals, whether the first load device or the charging device is connected to the second power interface. If the first load device is connected to the second power interface, the second path can be opened, and the first battery can be used to power the first load device. If the charging device is connected to the second power interface, the second path and the third path can be opened, and the charging device can be used to power the first power interface and charge the first battery.

[0015] In some embodiments, the power device includes: a power factor correction module, wherein an AC terminal of the power factor correction module is connected to a first power interface; and a DC conversion module, wherein a first terminal of the DC conversion module is connected to a DC terminal of the power factor correction module, and a second terminal of the DC conversion module is connected to a first battery. By providing the power factor correction module and the DC conversion module, bidirectional rectification and inversion conversion can be achieved, thereby enabling charging and discharging of the first battery.

[0016] In some embodiments, the DC conversion module is a bidirectional resonant DC converter.

[0017] In some embodiments, the first signal is at least one of a power-on signal, a key insertion signal, and a first power interface power supply signal.

[0018] In a second aspect, an embodiment of the present application provides a power supply system, including: a power device, which is the power device in the above embodiment, a first battery and a first power interface.

[0019] In some embodiments, the power supply system further includes a DC / DC conversion module comprising a high-voltage terminal and a low-voltage terminal, the high-voltage terminal being connected to the first battery and the low-voltage terminal being connected to a third load device; the DC / DC conversion module being configured to convert the battery voltage of the first battery into a second supply voltage and output it to the third load device. By providing the DC / DC conversion module, the high voltage of the first battery can also be converted into a low voltage to power a low-voltage load.

[0020] In some embodiments, the power supply system further includes: a second battery connected to the low-voltage terminal of the DC / DC converter module, wherein the rated voltage of the second battery is lower than the rated voltage of the first battery; the DC / DC converter module is further configured to output the second supply voltage to the second battery for charging; and the second battery is configured to output the battery voltage to power a third load device. By providing the second battery, the first battery can also be used to charge the second battery or the second battery can be used to power a low-voltage load.

[0021] In some embodiments, the power supply system further includes an AC power distribution module connected to the first power interface, the AC power distribution module being configured to perform power-on control and / or circuit protection for the power supply circuit between the connected second load device and the first power interface. The provision of the AC power distribution module enables on / off control and circuit protection of the power supply circuit, thereby improving the safety of the power supply system.

[0022] In some embodiments, the output end of the AC power distribution module includes multiple power supply ports, and the second load device includes multiple AC load devices; the AC power distribution module is used to connect to each AC load device through each power supply port, and perform independent power-on control and / or circuit protection on the power supply circuit where each AC load device is located. By connecting each AC load device to the corresponding power supply port on the AC power distribution module, the AC power distribution module can output a suitable AC voltage for each AC load device to supply power, and can also perform power-on control and circuit protection on each AC load device, so that each AC load device can operate independently without interfering with each other, thereby improving the compatibility and safety of the load power supply.

[0023] In a third aspect, an embodiment of the present application provides a vehicle, which includes the power supply system in the above embodiment.

[0024] In some embodiments, the power-on signal is a vehicle power-on key signal.

[0025] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without creative work.

[0027] FIG1 is a schematic diagram of a module structure of an electric power device according to an embodiment of the present application;

[0028] FIG2 is a schematic diagram of a module structure of an electric power device provided in another embodiment of the present application;

[0029] FIG3 is a schematic diagram of a module structure of an electric power device provided in another embodiment of the present application;

[0030] FIG4 is a schematic diagram of a module structure of an electric power device provided in yet another embodiment of the present application;

[0031] FIG5 is a schematic diagram of a module structure of an electric power device provided in another embodiment of the present application;

[0032] FIG6 is a schematic diagram of a module structure of an electric power device provided in another embodiment of the present application;

[0033] FIG7 is a schematic diagram of a module structure of an electric power device provided in yet another embodiment of the present application;

[0034] FIG8 is a schematic diagram of the module structure of a power supply system provided in one embodiment of the present application;

[0035] FIG9 is a schematic diagram of a module structure of a power supply system provided in another embodiment of the present application;

[0036] FIG10 is a schematic diagram of the module structure of a power supply system provided in another embodiment of the present application;

[0037] FIG11 is a schematic diagram of the module structure of a power supply system provided in yet another embodiment of the present application.

[0038] In the drawings, the drawings are not drawn to scale.

[0039] In the attached figure:

[0040] 10. Power equipment; 11. First switch; 20. First battery; 21. Second battery; 30. First power interface; 31. Second power interface; 40. Charging device; 50. First load device; 51. Second load device; 52. Third load device; PFC, power factor correction module; 60. DC conversion module; 70. DC / DC conversion module; PDU, AC power distribution module. DETAILED DESCRIPTION

[0041] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0043] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0045] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0046] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0047] The term "plurality" used in this application refers to two or more (including two).

[0048] Currently, with the development of new energy technologies, batteries are increasingly being used in various electrical devices, such as mobile phones, laptops, electric vehicles, electric airplanes, electric ships, etc. As the application areas of batteries continue to expand, their market demand is also constantly increasing.

[0049] Power batteries can serve as the main power source for electrical devices (such as vehicles, ships, or spacecraft), while energy storage batteries can serve as a charging source for electrical devices. The importance of both is self-evident. As an example and not a limitation, in some application scenarios, power batteries can be batteries in electrical devices, and energy storage batteries can be batteries in charging devices. For ease of description, in the following text, power batteries and energy storage batteries can be collectively referred to as batteries.

[0050] Currently, most batteries on the market are rechargeable batteries, the most common of which are lithium batteries, such as lithium-ion batteries or lithium-ion polymer batteries, etc. When a battery is installed in an electrical device, if the remaining power of the battery is insufficient, it needs to be connected to a charging device to charge the battery.

[0051] The battery can not only be connected to a charging device to receive the voltage output by the charging device for charging, but can also discharge externally to power various loads and motors.

[0052] The battery voltage provided by existing batteries is typically a DC voltage, which requires voltage conversion before it can power AC loads. For example, electric vehicles currently support charging port discharge. This means that AC loads can be connected to the charging port via a connector. After confirming the physical connection between the charging port and the connector, the electric vehicle can convert the battery voltage into AC voltage and output it to the load for powering.

[0053] However, with this battery discharge method, after connecting to the charging port, the load must communicate with the electric vehicle, confirming the physical connection through handshake signals, before it can receive the battery output voltage. Furthermore, the load's plug cannot be directly connected to the charging port, but rather requires a connector. Therefore, this battery-powered load method is cumbersome and inconvenient in daily use.

[0054] In order to solve the above technical problems, the embodiments of the present application provide an electric power device, a power supply system and a vehicle.

[0055] The power equipment disclosed in the embodiments of the present application can be used, but is not limited to, in power-consuming devices such as vehicles, ships, or aircraft. For example, the power equipment can be a charger, which can be an onboard charger installed in an electric vehicle, or can be installed in other power-consuming devices, enabling the charging device to charge the battery. For example, the power-consuming device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric vehicle, a ship, a spacecraft, and the like.

[0056] FIG1 shows a schematic diagram of a module structure of an electric power device 10 provided in one embodiment of the present application. The electric power device 10 includes a DC terminal and a first AC terminal.

[0057] The DC terminal of the power device 10 can be connected to the first battery 20 , and the first AC terminal can be connected to the first power interface 30 .

[0058] When receiving the first signal, the power device 10 can receive the battery voltage of the first battery 20, convert the battery voltage into a first AC voltage, and output it to the first power interface 30. The first AC voltage is output through a first path formed between the DC terminal and the first AC terminal to power the first power interface 30. The first power interface 30 can be a socket, a screw interface, a connector, or a power harness capable of achieving an electrical connection. When a load is connected to the first power interface 30, the first power interface 30 can provide the load with the first AC voltage for powering.

[0059] The battery voltage of the first battery 20 is a DC voltage, and the first AC voltage is an AC voltage. The power device 10 can realize conversion between DC voltage and AC voltage.

[0060] When the power device 10 provides the first AC voltage to the first power interface 30, a conventional AC load can be connected to the first power interface 30 via a plug and operate under the first AC voltage provided by the first power interface 30. That is, the power device 10 can convert the DC voltage output by the first battery 20 into an AC voltage and output it to the first power interface 30. When the AC load is normally connected to the first power interface 30, the AC load can be powered.

[0061] It is understood that the first signal may be a control signal generated when both the first battery 20 and the first power interface 30 are connected to the power device 10, a control signal sent by a processing module connected to the power device 10, or a control signal sent by a user terminal or server via a communication connection. For example, the first signal may be at least one of a power-on signal, a key insertion signal, and a first power interface power supply signal. The power-on signal may be a signal generated when the power device 10 is powered on, and the key insertion signal may be a signal generated when a user activates the power device 10 or an electrical device including the power device 10 using a key. The first power interface power supply signal may be a signal generated when the first power interface 30 is connected to the power device 10. If the power device 10 does not receive the first signal, even if both the first battery 20 and the first power interface 30 are connected to the power device 10, the power device 10 will not output the first AC voltage to the first power interface 30. In this case, when an AC load is connected to the first power interface 30, it cannot be powered, thereby improving the safety of load power supply.

[0062] In this embodiment, the DC terminal of the power device 10 is configured to be connected to the first battery 20, and the first AC terminal is configured to be connected to the first power interface 30. When the first power interface 30 and the first battery 20 are connected to the power device 10, upon receiving a first signal, the power device 10 can convert the battery voltage of the first battery 20 into a first AC voltage through inversion conversion, and output the first AC voltage to the first power interface 30 via a first path formed between the DC terminal and the first AC terminal. When an AC load is connected to the first power interface 30, the first AC voltage can power the AC load. When the first battery 20 is used to power the load, the AC load does not need to be connected to the charging port of the first battery 20 through a specific connector. It only needs to be connected to the first power interface 30 normally to receive the supply voltage and operate. This can reduce the cumbersome connection method when the first battery 20 is used to power the AC load, and improve the convenience of battery powering the load.

[0063] 2 and 3 , according to some embodiments of the present application, the power device 10 may further include a second AC end, which may be connected to the second power interface 31 .

[0064] When the charging device 40 is connected to the second power interface 31, as shown in Figure 2, the power device 10 can receive the output voltage of the charging device 40, convert the output voltage into a charging voltage, and output the charging voltage through the DC end to the first battery 20 through a second path between the second AC end and the DC end, so as to charge the first battery 20.

[0065] When the first AC end is connected to the first power interface 30, the power device 10 can also output the output voltage of the charging device 40 received by the second AC end to the first power interface 30 through the third path between the second AC end and the first AC end, that is, connect the first AC end with the second AC end so that the output voltage of the charging device 40 can also power the first power interface 30.

[0066] The output voltage of the charging device 40 is an AC voltage, and the charging voltage received by the first battery 20 is a DC voltage. The power device 10 can convert the AC voltage output by the charging device 40 into a charging voltage received by the first battery 20 through rectification and conversion, and charge the first battery 20. Specifically, in order to charge the first battery 20, the charging voltage should be higher than the battery voltage of the first battery 20.

[0067] In a specific embodiment, the power device 10 may be an onboard charger for an electric vehicle, which is capable of bidirectional current conversion, i.e., rectification conversion from the AC end to the DC end and inversion conversion from the DC end to the AC end. The first battery 20 may be a power battery for the electric vehicle, which may be a high-voltage battery. The second power interface 31 may be a charging port for the electric vehicle, and the charging device 40 may be a charging pile or other charging device. When the charging pile is connected to the charging port of the electric vehicle via a charging gun, the onboard charger may convert the voltage output by the charging pile into a charging voltage and output it to the first battery 20 to charge the first battery 20.

[0068] It is understandable that when the power device 10 connects the first AC terminal to the second AC terminal, the output voltage of the charging device 40 can directly power the first power interface 30. That is, the output voltage of the charging device 40 is now adapted to the power load connected to the first power interface 30. The operating voltage of the power load is generally AC220V / AC110V / AC380V, etc., so the output voltage of the charging device 40 should be within the operating voltage range of the power load. That is, the second power interface 31 can be a slow charging socket. In a specific embodiment, the second power interface 31 can be a national standard slow charging socket.

[0069] 5 , according to some embodiments of the present application, the power device 10 may further include a first switch 11 . The first switch 11 is connected to the second AC terminal of the power device 10 .

[0070] When the charging device 40 is connected to the second power interface 31, the power device 10 can control the first switch 11 to connect the second path and the third path. The second path is the path formed between the second AC terminal and the DC terminal, and the third path is the path formed between the second AC terminal and the first AC terminal.

[0071] When the second path is on, the voltage output by the charging device 40 can be converted by the power device 10 into a charging voltage for the first battery 20, thereby charging the first battery 20. When the charging device 40 is not connected to the second power interface 31, the first switch 11 can remain in the off state to improve the safety of the power supply circuit.

[0072] When the third path is on, the charging device 40 is connected to the first power interface 30. At this time, the output voltage of the charging device 40 can directly power the first power interface 30. When a load is connected to the first power interface 30, the output voltage of the charging device 40 can power the load.

[0073] According to some embodiments of the present application, the power device 10 may further include a second AC end, which can be connected to the second power interface 31 .

[0074] When the first load device 50 is connected to the second power interface 31, as shown in Figure 3, the power device 10 can receive the battery voltage of the first battery 20, convert the battery voltage into a first AC voltage, and output the first AC voltage to the first power interface 30 through a first path between the DC end and the first AC end to power the first power interface 30; and output the first AC voltage to the second power interface 31 through a second path between the DC end and the second AC end to power the first load device 50 connected to the second power interface 31.

[0075] When the first load device 50 is connected to the second power interface 31, the power device 10 can rectify and transform the battery voltage of the first battery 20 to obtain a first AC voltage, which is output through the first AC terminal and the second AC terminal. After the first power interface 30 receives the first AC voltage, the electrical load can be connected to the first power interface 30 via a conventional plug. The first AC voltage can then power the electrical load. After the second power interface 31 receives the first AC voltage, the first AC voltage can be used to power the first load device 50.

[0076] 6 , according to some embodiments of the present application, when the first load device 50 is connected to the second power interface 31 , the power device 10 can control the first switch 11 to conduct the second path formed between the second AC terminal and the DC terminal.

[0077] When the second path is on, the battery voltage output by the first battery 20 can be converted into a first AC voltage, which can then be output to the first load device 50 through the second path to power the first load device 50. It is understood that when the first load device 50 is not connected to the second power interface 31, the first switch 11 can remain in the off state to improve the safety of the power supply circuit.

[0078] It should be noted that, as shown in FIG4 , the second power interface 31 can be connected to the charging device 40 and can also be connected to the first load device 50, that is, the second power interface 31 can be used as a charging port or a discharging port. Taking an electric vehicle as an example, the second power interface 31 can be the charging port of the electric vehicle. The first load device 50 can be connected to the second power interface 31 by connecting to the charging port through a corresponding connecting device. That is, when the power device 10 uses the battery voltage of the first battery 20 to power the first power interface 30 and the second power interface 31, the power load connected to the first power interface 30 can be connected in a conventional plug manner, while the first load device 50 connected to the second power interface 31 cannot be connected in a conventional manner, but needs to be connected to the second power interface 31 through a connecting device.

[0079] If the first load device 50 has a conventional plug, it can be connected to the second power interface 31 through a connecting device; if the first load device 50 itself has an adapter plug device for connecting to the second power interface 31, the first load device 50 can also be directly connected to the second power interface 31.

[0080] Referring to FIG. 7 , according to some embodiments of the present application, the first load device 50 may be connected to the second power interface 31 .

[0081] When the first load device 50 is connected to the second power interface 31, the power device 10 can control the first switch 11 to be turned on. At this time, the power device 10 converts the battery voltage of the first battery 20 into a first AC voltage and outputs it to the first load device 50 through the turned-on first switch 11 to power the first load device 50.

[0082] In a specific embodiment, as shown in Figure 7, the first AC terminal and the second AC terminal of the power device 10 may be three-phase AC terminals, and the first switch 11 may include a K1 switch, a K2 switch, and a K3 switch. The K1 switch, the K2 switch, and the K3 switch may be relays.

[0083] According to some embodiments of the present application, when the second power interface 31 is connected to the power device 10, the power device 10 needs to determine whether the charging device 40 or the first load device 50 is connected to the second power interface 31 to achieve switching between rectification conversion and inversion conversion.

[0084] When either the charging device 40 or the first load device 50 is connected to the second power interface 31 , a corresponding indication signal is generated. The power device 10 can determine whether the charging device 40 or the first load device 50 is connected to the second power interface 31 based on the indication signal.

[0085] When the first load device 50 is connected to the second power interface 31, if the physical connection between the first load device 50 and the second power interface 31 is completed, a connection confirmation signal will be generated at the connection position. The power device 10 can confirm the physical connection is successful based on the connection confirmation signal.

[0086] It is understood that when the charging device 40 is connected to the second power interface 31, a connection confirmation signal is also generated at the connection location when the physical connection between the charging device 40 and the second power interface 31 is completed. That is, when the power device 10 receives the connection confirmation signal, it can only confirm that the physical connection is successful, but cannot confirm whether it is the charging device 40 or the first load device 50 that is connected.

[0087] When the charging device 40 is connected to the second power interface 31, after generating a connection confirmation signal, the charging device 40 can also receive the connection confirmation signal and send a charging guidance signal to the power device 10. After receiving the connection confirmation signal, if the power device 10 continues to receive the charging guidance signal, it can be confirmed that the connected device is the charging device 40. Conversely, if no charging guidance signal is received after receiving the connection confirmation signal, it can be confirmed that the connected device is the first load device 50.

[0088] In one specific embodiment, the power device 10 may be an onboard charger for an electric vehicle. The connection confirmation signal may be a CC signal generated when the charging device 40 is connected to the charging port via a charging plug, or a CC signal generated when the first load device 50 is connected to the charging port via a connector. Upon receiving the CC signal, the power device 10 can determine that the physical connection is successful. For example, when the power device 10 is physically connected to the charging device 40 or the first load device 50 via the connector, if the physical connection is successful, the power device 10 may receive a specific voltage signal through a certain connection port. If the physical connection is unsuccessful, the connection port on the power device 10 is effectively unconnected and cannot receive the specific voltage signal. The power device determines whether the physical connection is successful based on whether or not it receives the voltage signal. This voltage signal is the CC signal. After the charging device 40 receives the CC signal after connecting to the charging port via the charging plug, it may also transmit a charging guidance signal, which may be a CP signal. For example, a corresponding control module may be provided on the connector, such as an on-cable control box. When the power device 10 is connected to the charging device 40 or the first load device 50 via a connector, the control module on the connector can also determine whether the physical connection is successful based on the above-mentioned CC signal. If the connection is successful, and the charging device 40 is connected to the power device 10 via the connector, the control module on the connector can send a charging guidance signal, i.e., a CP signal, through the corresponding port. If the power device 10 receives the CP signal, it indicates that the charging device 40 is connected via the connector. Conversely, if the first load device 50 is connected to the power device 10 via the connector, the control module on the connector will not send a corresponding charging guidance signal. At this time, the power device 10 can determine that the first load device 50 is connected.

[0089] The CP signal may be a PWM signal. The charging device 40 may also send the maximum charging current that the charging device 40 can support to the electric vehicle by adjusting the duty cycle of the CP signal.

[0090] 7 , according to some embodiments of the present application, the power device 10 may include a power factor correction module PFC and a DC conversion module 60 .

[0091] When the first power interface 30 is connected to the power device 10, the AC end of the power factor correction module PFC can be connected to the first power interface 30. The first end of the DC conversion module 60 is connected to the DC end of the power factor correction module PFC. When the first battery 20 is connected to the power device 10, the second end of the DC conversion module 60 can be connected to the first battery 20.

[0092] When the charging device 40 is connected to the second power interface 31, the power factor correction module (PFC) can rectify the output voltage of the charging device 40 to convert the AC voltage into a DC voltage. The DC conversion module 60 can step up or down the DC voltage to generate a charging voltage greater than the battery voltage of the first battery 20, and output the charging voltage to the first battery 20, thereby charging the first battery 20.

[0093] When the first load device 50 is connected to the second power interface 31, or the power device 10 is supplying power to the first power interface 30, the DC conversion module 60 receives the battery voltage from the first battery 20, regulates the battery voltage, and then generates an AC voltage, i.e., a first AC voltage, after inversion conversion via the power factor correction module (PFC). This first AC voltage can then power the first power interface 30 or the first load device 50 connected to the second power interface 31.

[0094] According to some embodiments of the present application, the DC conversion module 60 may be a bidirectional resonant DC converter CLLLC.

[0095] An embodiment of the present application also provides a power supply system. FIG8 shows a schematic diagram of the module structure of a power supply system provided by an embodiment of the present application. The power supply system includes a power device 10 , a first battery 20 and a first power interface 30 .

[0096] The power device 10 is the power device 10 in the above embodiment. The first battery 20 is connected to the DC terminal of the power device 10 , and the first power interface 30 is connected to the first AC terminal of the power device 10 .

[0097] The power device 10 can convert the battery voltage of the first battery 20 into a first AC voltage to power the first power interface 30 . When the second load device 51 is connected to the first power interface 30 , the first AC voltage can power the second load device 51 .

[0098] In this embodiment, by setting the power device 10 to be connected to the first battery 20 and the first power interface 30 respectively, the power device 10 can generate a first AC voltage by inverting the battery voltage of the first battery 20 and output it to the first power interface 30. When the second load device 51 is connected to the first power interface 30, the first AC voltage can directly power the second load device 51. When the first battery 20 is used to power the electrical load, the electrical load does not need to be connected to the first battery 20 through the charging port, but can be directly connected to the first power interface 30 to obtain the first AC voltage. The second load device 51, which is an electrical load, can be powered on and operated when the plug is connected to the first power interface 30. It is very simple and convenient, and can improve the convenience of the battery powering the load.

[0099] Referring to FIG. 9 , according to some embodiments of the present application, the power supply system may further include a DC / DC conversion module 70 .

[0100] The DC / DC conversion module 70 may include a high-voltage end and a low-voltage end. The high-voltage end may be connected to the first battery 20 , and the low-voltage end may be connected to the third load device 52 .

[0101] When the third load device 52 is connected to the power supply system, the DC / DC conversion module 70 can receive the battery voltage of the first battery 20 and convert the battery voltage into a second power supply voltage through DC voltage regulation. The second power supply voltage can be output to the third load device 52 to power the third load device 52.

[0102] In a specific embodiment, the power supply system can be applied to electric vehicles, and the first battery 20 is the power battery of the electric vehicle. The battery voltage of the power battery of an existing electric vehicle is usually around 400V or 800V. When the battery voltage is used to supply power to a DC load, the battery voltage needs to be stepped down to meet the operating voltage range of the DC load. The third load device 52 can be various low-voltage DC loads in the electric vehicle, such as a low-voltage controller, audio, interior and exterior lights, sunroof, etc. The operating voltage of the above-mentioned low-voltage DC load is usually 12V or 24V, and the DC / DC conversion module 70 can convert the higher power battery voltage into a low-voltage DC power of about 12V or 24V, and supply power to the corresponding third load device 52.

[0103] Referring to FIG. 10 , according to some embodiments of the present application, the power supply system may further include a second battery 21 .

[0104] The second battery 21 may be connected to the low voltage terminal of the DC / DC conversion module 70 , and the rated voltage of the second battery 21 is lower than the rated voltage of the first battery 20 .

[0105] The DC / DC conversion module 70 can implement DC voltage regulation between the high-voltage end and the low-voltage end. When the DC / DC conversion module 70 receives the battery voltage of the first battery 20 at the high-voltage end, it can step down the battery voltage of the first battery 20 to generate a second power supply voltage, which can also charge the second battery 21. Since the battery voltage of the first battery 20 needs to be stepped down before it can charge the second battery 21, the rated voltage of the first battery 20 should be greater than the rated voltage of the second battery 21. In a specific embodiment, the first battery 20 can be a power battery of an electric vehicle, and the second battery 21 can be a storage battery or energy storage battery of the electric vehicle.

[0106] It is understood that when the battery charge of the second battery 21 meets the corresponding conditions and the third load device 52 is connected to the power supply system, the second battery 21 can also power the third load device 52. That is, when the DC / DC converter module 70 is turned on, the first battery 20 can charge the second battery 21 and power the third load device 52; when the DC / DC converter module 70 is turned off, the second battery 21 can power the third load device 52.

[0107] Referring to FIG. 11 , according to some embodiments of the present application, the power supply system may further include an AC power distribution module PDU.

[0108] The AC power distribution module PDU can be connected to the first power interface 30. When the AC power distribution module PDU is connected to the second load device 51, the AC power distribution module PDU can perform power-on control or loop protection on the power supply circuit between the first power interface 30 and the second load device 51. Power-on control means that the AC power distribution module PDU can control the conduction state of the circuit between the first power interface 30 and the second load device 51, such as connecting the first power interface 30 to the second load device 51 or disconnecting the first power interface 30 from the second load device 51. Loop protection means that the AC power distribution module PDU can perform real-time power monitoring of the circuit, such as monitoring power parameters such as power supply voltage, current, active power, reactive power and frequency. When overcurrent, overvoltage, overtemperature or other abnormalities occur in the circuit, an alarm prompt can be issued in time and the power supply circuit can be cut off.

[0109] According to some embodiments of the present application, the output end of the AC power distribution module PDU may include multiple power supply ports, and the second load device 51 may include multiple AC load devices.

[0110] The AC power distribution module PDU can connect to individual AC load devices through its power supply ports, independently controlling power on and protecting the power supply circuits for each AC load device. Specifically, when a single AC load device is connected to the corresponding power supply port on the AC power distribution module PDU, the PDU can independently control power on and off for that load device. If a circuit anomaly occurs in the power supply circuit for that AC load device, the PDU can shut down that circuit independently without affecting the normal power supply of other AC load devices.

[0111] According to some embodiments of the present application, the present application also provides a vehicle, including the power supply system of any of the above embodiments, the first power interface of the power supply system is located inside the vehicle, and the first power interface of the power supply system can serve as an in-vehicle socket of the vehicle. When the electrical load is connected to the in-vehicle socket, the power supply system can supply power to the electrical load.

[0112] When the power supply system is applied to a vehicle, the vehicle power-on module of the vehicle can also send a vehicle power-on key signal or a start signal to the power equipment of the power supply system when the user triggers a start operation. Upon receiving the vehicle power-on key signal or the start signal, the power equipment can determine that a power-on signal has been received and energize the first power interface.

[0113] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric power device, comprising a DC terminal and a first AC terminal; the DC terminal is connected to a first battery, and the first AC terminal is connected to a first power interface; The power device is configured to, upon receiving a first signal, convert the battery voltage of the first battery into a first AC voltage, and supply power to the first power interface through a first path between the DC end and the first AC end.

2. The electric power device according to claim 1, wherein: The power equipment further includes a second AC end connected to a second power interface; When the charging device is connected to the second power interface, the power device charges the first battery through a second path between the second AC end and the DC end, and also supplies power to the first power interface through a third path between the second AC end and the first AC end.

3. The electric power device according to claim 2, wherein: The power equipment further includes: a first switch connected to the second AC end; When the charging device is connected to the second power interface, the power device controls the first switch to connect the second path and the third path.

4. The electric power device according to claim 1, wherein: The power equipment further includes a second AC end connected to a second power interface; When a first load device is connected to the second power interface, the power device converts the battery voltage of the first battery into a first AC voltage, and supplies power to the first power interface through a first path between the DC end and the first AC end, and supplies power to the first load device through a second path between the DC end and the second AC end.

5. The electric power device according to claim 4, wherein: When the first load device is connected to the second power interface, the power device controls the first switch to turn on the second path.

6. The electric power equipment according to any one of claims 2 to 5, wherein: The power device is configured to determine that the first load device is connected to the second power interface when a connection confirmation signal is received and a charging guidance signal is not received; The power device is further configured to determine that the charging device is connected to the second power interface when both the connection confirmation signal and the charging guidance signal are received.

7. The electric power device according to claim 1, wherein: The power equipment includes: a power factor correction module, wherein an AC end of the power factor correction module is connected to the first power interface; A DC conversion module, wherein a first end of the DC conversion module is connected to the DC end of the power factor correction module, and a second end of the DC conversion module is connected to the first battery.

8. The electric power device according to claim 7, wherein: The DC conversion module is a bidirectional resonant DC converter.

9. The electric power device according to claim 1, wherein: The first signal is at least one of a power-on signal, a key insertion signal, and a first power interface power supply signal.

10. A power supply system, comprising: The power device according to any one of claims 1 to 9, a first battery, and a first power interface.

11. The power supply system according to claim 10, wherein: The power supply system further includes: A DC / DC conversion module, comprising a high-voltage end and a low-voltage end, wherein the high-voltage end is connected to the first battery, and the low-voltage end is used to connect to a third load device; The DC / DC conversion module is used to convert the battery voltage of the first battery into a second power supply voltage and output the second power supply voltage to the third load device.

12. The power supply system according to claim 11, wherein: The power supply system further includes: a second battery connected to the low-voltage terminal of the DC / DC conversion module, wherein the rated voltage of the second battery is lower than the rated voltage of the first battery; The DC / DC conversion module is further configured to output the second supply voltage to the second battery for charging; The second battery is used to output a battery voltage to power the third load device.

13. The power supply system according to claim 10, wherein: The power supply system further includes: An AC power distribution module is connected to the first power interface, and is used to perform power-on control and / or circuit protection on a power supply circuit between a connected second load device and the first power interface.

14. The power supply system according to claim 13, wherein: The output end of the AC power distribution module includes a plurality of power supply ports, and the second load device includes a plurality of AC load devices; The AC power distribution module is used to connect to each AC load device through each power supply port, and perform independent power-on control and / or circuit protection on the power supply circuit where each AC load device is located.

15. A vehicle comprising the power supply system according to any one of claims 10 to 14.

16. The vehicle of claim 15, wherein: The power-on signal is the vehicle power-on key signal.

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