Rectifier unit, on-board charging device and vehicle

Abstract

The present application provides a rectifier unit, an on-board charging device, and a vehicle. The on-board charging system includes a wired charging unit, a wireless charging unit, and the rectifier unit. The rectifier unit includes a first rectifier unit, a second rectifier unit, and a third rectifier unit. The first rectifier unit is connected to the second rectifier unit, and the second rectifier unit is connected to the third rectifier unit. The wired charging unit is connected to the first rectifier unit and the second rectifier unit, respectively, and the wireless charging unit is connected to the first rectifier unit and the third rectifier unit, respectively. This not only enables switching between wired and wireless charging, but also reduces the cost, volume, and weight of vehicle components, optimizing the vehicle's spatial layout.

Description

Technical Field

[0001] The present application relates to the field of automobile technology, and in particular to a rectifier unit, an on-board charging device, and a vehicle. Background Art

[0002] With the development of intelligent vehicles, wireless charging is gradually appearing in more and more car models. Generally, it is necessary to install both wireless and wired charging devices in the car. However, due to the cost of wireless charging products and the fact that wireless charging and wired charging have separate processing logic, when a car is equipped with both wired and wireless charging devices, the charging system will be larger and heavier. This in turn leads to complex internal structure and unreasonable space layout, making wireless charging difficult to popularize quickly. Summary of the Invention

[0003] The embodiments of the present application provide a rectifier unit, an on-board charging device, and a vehicle, in order to realize switching between wired charging and wireless charging, reduce the cost, volume, and weight of vehicle components, and optimize the vehicle's spatial layout.

[0004] In a first aspect, an embodiment of the present application provides a rectifier unit, wherein the vehicle-mounted charging system includes a wired charging unit, a wireless charging unit, and the rectifier unit, wherein the rectifier unit includes a first rectifier unit, a second rectifier unit, and a third rectifier unit;

[0005] The first rectifier unit is connected to the second rectifier unit, the second rectifier unit is connected to the third rectifier unit, the wired charging unit is connected to the first rectifier unit and the second rectifier unit respectively, and the wireless charging unit is connected to the first rectifier unit and the third rectifier unit respectively;

[0006] The rectifying unit is used to rectify the current from the wired charging unit or the wireless charging unit.

[0007] It can be seen that in the present application, the wired charging unit and the wireless charging unit share a rectifier unit in the rectifier unit for rectification, which not only enables the vehicle to switch between wired charging and wireless charging, but also reduces the cost waste of vehicle components caused by using a separate rectifier unit for the wired charging unit and the wireless charging unit. It can be seen that the present application can reduce the volume and weight, optimize the vehicle space layout, and sharing only one rectifier unit can also increase the service life of the rectifier unit.

[0008] Furthermore, each of the first rectifier unit, the second rectifier unit and the third rectifier unit includes at least one rectifier module; the at least one rectifier module is used to rectify the current obtained by the rectifier unit.

[0009] It can be seen that the rectifier unit of the present application includes at least one rectifier module for rectification, which can ensure the rectification effect and rectification efficiency of the current flowing into the rectifier unit.

[0010] Furthermore, the rectifier unit also includes a first switch subunit and a second switch subunit; the first end of the first switch subunit is connected to the wired charging unit, and the second end of the first switch subunit is connected to the first rectifier unit or the second rectifier unit, and is used to control the connection relationship between the wired charging unit and the rectifier unit according to the current charging mode, and the charging mode includes a wired charging mode or a wireless charging mode; the first end of the second switch subunit is connected to the wireless charging unit, and the second end of the second switch subunit is connected to the first rectifier unit or the third rectifier unit, and is used to control the connection relationship between the wireless charging unit and the rectifier unit according to the current charging mode.

[0011] It can be seen that in the present application, the connection relationship between the wired charging unit, the wireless charging unit and the rectifier unit is controlled by the first switch sub-unit and the second switch sub-unit, so that the vehicle can switch between the wired charging mode and the wireless charging mode.

[0012] Furthermore, the first switch subunit includes a first relay switch, and the second switch subunit includes a second relay switch.

[0013] It can be seen that in the present application, by controlling the relay switch, the connection relationship between the wired charging unit, the wireless charging unit and the rectifier unit can be conveniently and quickly controlled, thereby improving the switching rate of the charging mode.

[0014] Furthermore, the rectifier module includes a diode submodule and a transistor submodule; the diode submodule is connected in parallel with the transistor submodule; the transistor submodule is used to rectify the current obtained by the rectifier unit, and the diode submodule is used to protect the circuit safety of the transistor submodule.

[0015] It can be seen that in the present application, the rectifier module includes a diode sub-module and a transistor sub-module, which can not only improve the rectification efficiency but also ensure circuit safety.

[0016] Furthermore, the diode submodule includes a diode, and the transistor submodule includes a field effect transistor.

[0017] It can be seen that in this application, the use of field effect transistors for rectification can not only improve the rectification efficiency but also reduce power consumption.

[0018] In a second aspect, an embodiment of the present application provides an on-vehicle charging device, wherein an on-vehicle charging system includes the on-vehicle charging device, the on-vehicle charging device includes a wired charging unit, a wireless charging unit, and a rectifier unit as provided in the first aspect above, wherein the rectifier unit includes a first rectifier unit, a second rectifier unit, and a third rectifier unit;

[0019] The first rectifier unit is connected to the second rectifier unit, the second rectifier unit is connected to the third rectifier unit, the wired charging unit is connected to the first rectifier unit and the second rectifier unit respectively, and the wireless charging unit is connected to the first rectifier unit and the third rectifier unit respectively;

[0020] The wired charging unit and the wireless charging unit are used to obtain charging current.

[0021] Furthermore, the device further includes a filtering unit; the filtering unit is connected to the rectifying unit and is configured to filter the current from the rectifying unit.

[0022] It can be seen that in this application, the wired charging unit and the wireless charging unit share a filtering unit, which can not only realize the switching between wired charging and wireless charging, but also reduce the cost, volume and weight of vehicle components and optimize the vehicle space layout.

[0023] Furthermore, the filtering unit includes a filtering capacitor.

[0024] It can be seen that filtering by filter capacitors in this application not only has a simple structure but also can reduce the cost of vehicle components.

[0025] In a third aspect, an embodiment of the present application provides a vehicle, comprising a rectifier unit as provided in the first aspect above or an on-board charging device as provided in the second aspect above.

[0026] As can be seen, in this example, the first rectifier unit is connected to the second rectifier unit, the second rectifier unit is connected to the third rectifier unit, the wired charging unit is connected to the first rectifier unit and the second rectifier unit respectively, and the wireless charging unit is connected to the first rectifier unit and the third rectifier unit respectively; the rectifier unit is used to rectify the current from the wired charging unit or the wireless charging unit. This allows the wired charging unit and the wireless charging unit to be integrated and share a single rectifier unit, which can achieve switching between wired and wireless charging, while reducing the cost, volume, and weight of vehicle components and optimizing the vehicle's spatial layout. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 these drawings without any creative work.

[0028] Figure 1 This is a structural diagram of a rectifier unit provided in an embodiment of the present application;

[0029] Figure 2 This is a structural diagram of a rectifier unit provided in an embodiment of the present application;

[0030] Figure 3a This is a structural diagram of another rectifier unit provided in an embodiment of the present application;

[0031] Figure 3b is a structural diagram of another rectifier unit provided in an embodiment of the present application;

[0032] Figure 4 This is a structural diagram of a rectifier module provided in an embodiment of the present application;

[0033] Figure 5 This is a schematic diagram of the circuit structure of a rectifier unit provided in an embodiment of the present application;

[0034] Figure 6 This is a schematic structural diagram of a vehicle-mounted charging device provided in an embodiment of the present application;

[0035] Figure 7 This is a structural diagram of another vehicle-mounted charging device provided in an embodiment of the present application;

[0036] Figure 8 This is a circuit structure diagram of a vehicle-mounted charging device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0038] The following are detailed descriptions of each.

[0039] The terms "first," "second," "third," and "fourth," etc., in the specification and claims of this application and the accompanying drawings are used to distinguish between different objects, rather than to describe a particular order. In addition, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0040] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present 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. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0041] The technical solution in this application will be described below with reference to the accompanying drawings.

[0042] See also Figure 1 , Figure 1 This is a structural diagram of a rectifier unit provided in an embodiment of the present application. Figure 1 As shown, the rectifier unit 13 is applied to the on-board charging system 10, which includes a wired charging unit 11, a wireless charging unit 12 and the rectifier unit 13. The rectifier unit 13 includes a first rectifier unit 131, a second rectifier unit 132 and a third rectifier unit 133; the first rectifier unit 131 is connected to the second rectifier unit 132, the second rectifier unit 132 is connected to the third rectifier unit 133, the wired charging unit 11 is connected to the first rectifier unit 131 and the second rectifier unit 132 respectively, and the wireless charging unit 12 is connected to the first rectifier unit 131 and the third rectifier unit 133 respectively; the rectifier unit 13 is used to rectify the current from the wired charging unit 11 or from the wireless charging unit 12.

[0043] Among them, the wired charging unit may include a wired charger, and the wireless charging unit may include a wireless charger. The wired charging unit and the wireless charging unit may be integrated together to share a rectifier unit, so that the charging current obtained by the wired charging unit or the wireless charging unit is rectified by the same rectifier unit. In a specific implementation, a rectifier unit includes multiple rectifier units, and each rectifier unit can be used to rectify the current obtained by the rectifier unit. In the present application, the charging current obtained by the wired charging unit is rectified by the first rectifier unit and the second rectifier unit, and the current obtained by the wireless charging unit is rectified by the first rectifier unit and the third rectifier unit. That is to say, the wired charging unit and the wireless charging unit share the same rectifier unit. It should be noted that the first rectifier unit, the second rectifier unit and the third rectifier unit are the same rectifier units, so the wired charging unit and the wireless charging unit can also be a shared second rectifier unit or a third rectifier unit.

[0044] It can be seen that in this example, the wired charging unit and the wireless charging unit share a rectifier unit in the rectifier unit for rectification, which not only enables the vehicle to switch between wired charging and wireless charging, but also reduces the cost waste of vehicle components caused by using a separate rectifier unit for the wired charging unit and the wireless charging unit. It can be seen that this application can reduce the volume and weight, optimize the vehicle space layout, and sharing only one rectifier unit can also increase the service life of the rectifier unit.

[0045] In a possible example, each of the first rectifier unit, the second rectifier unit, and the third rectifier unit includes at least one rectifier module; and the at least one rectifier module is used to rectify the current obtained by the rectifier unit.

[0046] Since the first rectifier unit, the second rectifier unit and the third rectifier unit are the same rectifier unit, take any one rectifier unit as an example, refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a rectifier unit provided in an embodiment of the present application. Figure 2 As shown, a rectifier unit 20 includes at least one rectifier module 201. The rectifier module in the dashed box represents a rectifier module that may or may not be present. That is, the rectifier unit may include one or more rectifier modules. When the rectifier unit includes multiple rectifier modules, these multiple rectifier modules can be connected sequentially. Each rectifier module can be used to rectify the current flowing into the rectifier unit.

[0047] It can be seen that in this embodiment, the rectifier unit includes at least one rectifier module for rectification, which can ensure the rectification effect and rectification efficiency of the current flowing into the rectifier unit.

[0048] In one possible instance, see Figure 3a and Figure 3b The rectifier unit 33 also includes a first switch subunit 334 and a second switch subunit 335; a first end of the first switch subunit 334 is connected to the wired charging unit 31, and a second end of the first switch subunit 334 is connected to the first rectifier unit 331 or the second rectifier unit 332, for controlling the connection relationship between the wired charging unit 31 and the rectifier unit 33 according to the current charging mode, and the charging mode includes a wired charging mode or a wireless charging mode; a first end of the second switch subunit 335 is connected to the wireless charging unit 32, and a second end of the second switch subunit 335 is connected to the first rectifier unit 331 or the third rectifier unit 333, for controlling the connection relationship between the wireless charging unit 32 and the rectifier unit 33 according to the current charging mode.

[0049] in, Figure 3a The first switch subunit shown is connected to the wired charging unit and the first rectifier unit respectively, and the second switch subunit is connected to the wireless charging unit and the first rectifier unit respectively. In a specific implementation, the first switch subunit can also be connected to the wired charging unit and the first rectifier unit respectively, and the second switch subunit can be connected to the wireless charging unit and the third rectifier unit respectively. Or, as Figure 3b The first switch subunit shown is connected to the wired charging unit and the second rectifier unit, respectively, and the second switch subunit is connected to the wireless charging unit and the third rectifier unit, respectively. Alternatively, the first switch subunit is connected to the wired charging unit and the second rectifier unit, respectively, and the second switch subunit is connected to the wireless charging unit and the first rectifier unit, respectively. When the charging mode is the wireless charging mode, that is, the charging current is obtained through the wireless charging unit, at this time, the wired charging unit should be disconnected from the rectifier unit through the first switch subunit, and the wireless charging unit should be connected to the rectifier unit through the second switch subunit, so that the rectifier unit can rectify the charging current obtained by the wireless charging unit. When the charging mode is the wired charging mode, that is, the charging current is obtained through the wired charging unit, and the functions of the first switch subunit and the second switch subunit are similar.

[0050] It can be seen that in this example, the connection relationship between the wired charging unit, the wireless charging unit and the rectifier unit is controlled by the first switch sub-unit and the second switch sub-unit, so that the vehicle can switch between the wired charging mode and the wireless charging mode.

[0051] In a possible example, the first switch subunit and the second switch subunit control the connection relationship between the wired charging unit and the wireless charging unit and the first rectifier subunit respectively according to the current charging mode, including: obtaining the currently available charging mode; when the currently available charging mode includes the wireless charging mode, controlling the first switch subunit to be disconnected and the second switch subunit to be closed.

[0052] Among them, the currently available charging mode includes a wired charging mode or a wireless charging mode. If the currently available charging mode is the wireless charging mode, the switch state of the first switch subunit is controlled to be disconnected, and the switch state of the second switch subunit is controlled to be closed, so that the wired charging unit is disconnected from the rectifier unit and the wireless charging unit is connected to the rectifier unit. This allows the vehicle to obtain charging current through the wireless charging unit and the rectifier unit to rectify the current obtained by the wireless charging unit. Similarly, if the currently available charging mode is the wireless charging mode, the switch state of the first switch subunit is controlled to be closed, and the switch state of the second switch subunit is controlled to be disconnected.

[0053] It can be seen that in this example, the charging mode can be switched only by changing the switch states of the first switch subunit and the second switch subunit, which not only has a simple structure but also can quickly switch the charging mode.

[0054] In a possible example, the first switch subunit includes a first relay switch, and the second switch subunit includes a second relay switch.

[0055] The first switch subunit and the second switch subunit may not only be relay switches, but may also be evolved and replaced by semiconductor switches.

[0056] It can be seen that in this example, by controlling the relay switch, the connection relationship between the wired charging unit, the wireless charging unit and the rectifier unit can be conveniently and quickly controlled, thereby improving the switching rate of the charging mode.

[0057] In one possible instance, see Figure 4 The rectifier module 40 includes a diode sub-module 41 and a transistor sub-module 42; the diode sub-module 41 is connected in parallel with the transistor sub-module 42; the transistor sub-module 42 is used to rectify the current obtained by the rectifier unit, and the diode sub-module 41 is used to protect the circuit safety of the transistor sub-module 42.

[0058] Among them, the diode submodule is connected in parallel with the transistor submodule, so that when an overvoltage occurs, the devices in the diode submodule are reversely broken down first, and the large current is directly discharged to the ground, thereby avoiding the devices in the transistor submodule from being burned out. In a specific implementation, a rectifier unit includes two rectifier modules, and the two rectifier modules are connected in series. When rectifying the current obtained by the wired charging unit, the two rectifier modules included in the first rectifier unit and the two rectifier modules included in the second rectifier unit can be regarded as a rectifier bridge. Similarly, when rectifying the current obtained by the wireless charging unit, the two rectifier modules included in the first rectifier unit and the two rectifier modules included in the third rectifier unit can be regarded as a rectifier bridge.

[0059] It can be seen that in this example, the rectifier module includes a diode sub-module and a transistor sub-module, which can not only improve the rectification efficiency but also ensure circuit safety.

[0060] In a possible example, the diode sub-module includes a diode, and the transistor sub-module includes a field effect transistor.

[0061] Wherein, the field effect transistor includes a metal-oxide-semiconductor field-effect transistor (MOSFET). Figure 5 As shown, Figure 5 This is a circuit structure diagram of a rectifier unit provided in an embodiment of the present application. The rectifier unit 50 shown in the figure includes three parallel rectifier units 51, each rectifier unit 51 includes two rectifier modules 511, each rectifier module 511 includes a diode D1 and a field effect transistor Q1, and the diode and the field effect transistor are connected in parallel.

[0062] It can be seen that in this example, using field effect transistors for rectification can not only improve the rectification efficiency but also reduce power consumption.

[0063] The present application also provides a vehicle-mounted charging device. Figure 6 , Figure 6It is a structural schematic diagram of a vehicle-mounted charging device provided in an embodiment of the present application. The vehicle-mounted charging system 6 includes the vehicle-mounted charging device 60, and the vehicle-mounted charging device 60 includes a wired charging unit 61, a wireless charging unit 62, and a rectifier unit 63 as described in the above embodiment. The rectifier unit 63 includes a first rectifier unit 631, a second rectifier unit 632 and a third rectifier unit 633; ​​the first rectifier unit 631 is connected to the second rectifier unit 632, and the second rectifier unit 632 is connected to the third rectifier unit 633. The wired charging unit 61 is connected to the first rectifier unit 631 and the second rectifier unit 632 respectively, and the wireless charging unit 62 is connected to the first rectifier unit 631 and the third rectifier unit 633 respectively; the wired charging unit 61 and the wireless charging unit 62 are used to obtain charging current.

[0064] In one possible instance, see Figure 7 , Figure 7 FIG2 is a schematic diagram of the structure of another on-board charging device provided in an embodiment of the present application. As shown in the figure, the on-board charging device 70 further includes a filtering unit 74; the filtering unit 74 is connected to the rectifier unit 73 and is used to filter the current from the rectifier unit 73.

[0065] Among them, such as Figure 7 In the vehicle-mounted charging device 70 shown in FIG, the wired charging unit 71 and the wireless charging unit 72 share a filtering unit 74. In a specific implementation, the vehicle-mounted charging device may further include a first switch unit and a second switch unit, wherein the first switch unit is connected to the wired charging unit and the rectifier unit, and the second switch unit is connected to the wireless charging unit and the rectifier unit. The first switch unit is used to control the connection relationship between the wired charging unit and the rectifier unit, and the second switch unit is used to control the connection relationship between the wireless charging unit and the rectifier unit.

[0066] It can be seen that in this example, the wired charging unit and the wireless charging unit share a filtering unit, which can not only realize the switching between wired charging and wireless charging, but also reduce the cost, volume and weight of vehicle components and optimize the vehicle space layout.

[0067] In a possible example, the filtering unit includes a filtering capacitor.

[0068] The filter capacitor may be an electrolytic capacitor. Of course, the filter unit may also include other devices that can be used for filtering, for example, the filter unit includes a capacitor and an inductor, or includes a capacitor and a resistor, etc.

[0069] Therefore, if Figure 8 As shown, Figure 8This is a circuit diagram of a vehicle-mounted charging device provided in an embodiment of the present application. Figure 8 The illustrated on-board charging device comprises a rectifier module formed by connecting a diode D1 and a field-effect transistor Q1 in parallel. Two rectifier modules are connected in series to form a rectifier unit. Three rectifier units, a first switch unit S1A, and a second switch unit S1B form the rectifier unit, while a filter capacitor C1 forms the filter unit. Of course, the rectifier unit may not include the first and second switch units. In this case, S1A in the figure represents the first switch unit, and S1B represents the second switch unit.

[0070] It can be seen that in this example, the wired charging unit and the wireless charging unit share a filtering unit, which can not only realize the switching between wired charging and wireless charging, but also reduce the cost, volume and weight of vehicle components and optimize the vehicle space layout.

[0071] An embodiment of the present application further provides a vehicle, which includes the rectifier unit as described in the above embodiment or the on-board charging device as described in the above embodiment.

[0072] It should be noted that for the aforementioned device or module embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that this application is not limited by the order of the actions described, because according to this application, certain steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions and modules involved are not necessarily required by this application.

[0073] In the embodiments provided in this application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules described above is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical or other forms.

[0074] The modules described above as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0075] In addition, the functional modules in the embodiments of the present application may be integrated into a processing module, or each module may exist physically separately, or two or more modules may be integrated into a single module. The above-mentioned integrated modules may be implemented in the form of hardware or software functional modules.

[0076] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the present application and its core ideas. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A rectifier unit, used in a vehicle charging system, characterized in that: The on-board charging system includes a wired charging unit, a wireless charging unit, and the rectifier unit. The rectifier unit includes a first rectifier unit, a second rectifier unit, and a third rectifier unit. Each of the first rectifier unit, the second rectifier unit, and the third rectifier unit includes two rectifier modules. The two rectifier modules are connected in series. The rectifier module is used to rectify the current obtained by the rectifier unit. The rectifier module includes a diode submodule and a transistor submodule. The diode submodule is connected in parallel with the transistor submodule. The transistor submodule is used to rectify the current obtained by the rectifier unit, and the diode submodule is used to protect the circuit safety of the transistor submodule. The diode submodule includes a diode, and the transistor submodule includes a field effect transistor; The first rectifier unit is connected to the second rectifier unit, the second rectifier unit is connected to the third rectifier unit, the wired charging unit is connected to the first rectifier unit and the second rectifier unit respectively, and the wireless charging unit is connected to the first rectifier unit and the third rectifier unit respectively; The rectifying unit is used to rectify the current from the wired charging unit or the wireless charging unit; When rectifying the current obtained by the wired charging unit, the two rectifier modules included in the first rectifier unit and the two rectifier modules included in the second rectifier unit are used as a rectifier bridge; when rectifying the current obtained by the wireless charging unit, the two rectifier modules included in the first rectifier unit and the two rectifier modules included in the third rectifier unit are used as a rectifier bridge.

2. The rectifier unit according to claim 1, characterized in that The rectifier unit further includes a first switch subunit and a second switch subunit; The first end of the first switch subunit is connected to the wired charging unit, and the second end of the first switch subunit is connected to the first rectifier unit or the second rectifier unit, and is used to control the connection relationship between the wired charging unit and the rectifier unit according to the current charging mode, where the charging mode includes a wired charging mode or a wireless charging mode; The first end of the second switch subunit is connected to the wireless charging unit, and the second end of the second switch subunit is connected to the first rectifier unit or the third rectifier unit, and is used to control the connection relationship between the wireless charging unit and the rectifier unit according to the current charging mode.

3. The rectifier unit according to claim 2, characterized in that: The first switch subunit includes a first relay switch, and the second switch subunit includes a second relay switch.

4. A vehicle-mounted charging device, applied to a vehicle-mounted charging system, characterized in that: The on-board charging system includes the on-board charging device, which includes a wired charging unit, a wireless charging unit, and the rectifier unit according to any one of claims 1 to 3, wherein the rectifier unit includes a first rectifier unit, a second rectifier unit, and a third rectifier unit; each of the first rectifier unit, the second rectifier unit, and the third rectifier unit includes two rectifier modules; the two rectifier modules are connected in series; the rectifier module is used to rectify the current obtained by the rectifier unit; the rectifier module includes a diode submodule and a transistor submodule; the diode submodule is connected in parallel with the transistor submodule; the transistor submodule is used to rectify the current obtained by the rectifier unit, and the diode submodule is used to protect the circuit safety of the transistor submodule; The diode submodule includes a diode, and the transistor submodule includes a field effect transistor; The first rectifier unit is connected to the second rectifier unit, the second rectifier unit is connected to the third rectifier unit, the wired charging unit is connected to the first rectifier unit and the second rectifier unit respectively, and the wireless charging unit is connected to the first rectifier unit and the third rectifier unit respectively; The wired charging unit and the wireless charging unit are used to obtain charging current; when rectifying the current obtained by the wired charging unit, the two rectifier modules included in the first rectifier unit and the two rectifier modules included in the second rectifier unit are used as a rectifier bridge; when rectifying the current obtained by the wireless charging unit, the two rectifier modules included in the first rectifier unit and the two rectifier modules included in the third rectifier unit are used as a rectifier bridge.

5. The vehicle-mounted charging device according to claim 4, characterized in that: The vehicle-mounted charging device further includes a filtering unit; The filtering unit is connected to the rectifying unit and is used to filter the current from the rectifying unit.

6. The vehicle-mounted charging device according to claim 5, characterized in that: The filtering unit includes a filtering capacitor.

7. A vehicle, characterized in that: The vehicle includes the rectifier unit according to any one of claims 1 to 3 or the on-board charging device according to any one of claims 4 to 6.

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