On-board charger, on-board power supply device and vehicle

Abstract

An on-board charger (1008), an on-board power supply device (1003) and a vehicle. The on-board charger (1008) comprises a housing (100), a circuit board (200), a filtering module (300) and a sealing member. The housing (100) comprises a first side surface (110) and a second side surface (120) arranged opposite to each other. A first cavity (130) is recessed from the first side surface (110), a second cavity (140) is recessed from the second side surface (120), and the first cavity (130) is spaced apart from the second cavity (140). The circuit board (200) is provided in the first cavity (130). The filtering module (300) is provided in the second cavity (140), and the filtering module (300) is electrically connected to the circuit board (200). The sealing member is connected to the housing (100).

Description

On-board charger, on-board power supply device and vehicle

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on October 31, 2023, with application number 202322938264.9 and application name “On-board charger, on-board power supply device and vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of vehicle technology, and in particular to an on-board charger, an on-board power supply device and a vehicle. Background Art

[0003] With the growing demand for energy conservation, emission reduction, and air pollution control, the automotive industry needs to urgently transform its energy structure. New energy vehicles are gradually becoming commercialized, with electric vehicles being the primary force in this sector, and their future development potential and market demand are enormous. As a crucial component of an electric vehicle's charging system, the onboard power supply comprises an onboard charger (OBC), an onboard DC / DC converter, and a high-voltage power distribution unit (PDU). The OBC is a charger permanently installed on the electric vehicle, taking AC power as input and outputting DC power, directly charging the power battery and enabling safe and automatic charging of the electric vehicle's power battery.

[0004] In the prior art, the electromagnetic interference (EMI) filter module of an on-board charger is installed in the same large aluminum alloy cavity as the main power board. A shielding cover is installed between the EMI filter module and the main power board to shield the EMI filter module. When using this method, there is a gap between the shielding cover and the box body, which has a poor shielding effect on the EMI filter module and affects the electromagnetic compatibility (EMC) indicators of the entire device.

[0005] Summary of the Invention

[0006] The purpose of this application is to provide an on-board charger, an on-board power supply device and a vehicle to solve the problem that the shielding effect of the electromagnetic interference (EMI) filter module is poor and affects the electromagnetic compatibility (EMC) index of the entire machine.

[0007] To achieve the purpose of this application, this application provides the following technical solutions:

[0008] In a first aspect, the present application provides a vehicle-mounted charger, comprising:

[0009] The box body includes a first side surface and a second side surface that are oppositely arranged, the first cavity is recessed from the first side surface, the second cavity is recessed from the second side surface, and the first cavity is spaced apart from the second cavity;

[0010] a circuit board, disposed in the first cavity;

[0011] a filter module, disposed in the second cavity, the filter module being electrically connected to the circuit board;

[0012] A sealing member is connected to the box body to seal the circuit board in the first cavity and the filter module in the second cavity.

[0013] In one embodiment, the first side surface and the second side surface are spaced apart in the height direction of the box body, and an inner wall of the first cavity and an inner wall of the second cavity are spaced apart in the height direction of the box body.

[0014] In one embodiment, the on-board charger also includes a magnetic element module, the filter module includes a DC filter module and an AC filter module, the second cavity includes a plurality of mutually isolated chambers, the plurality of chambers include a first chamber, a second chamber, and a third chamber, the DC filter module is arranged in the first chamber, the AC filter module is arranged in the second chamber, and the magnetic element module is arranged in the third chamber.

[0015] In one embodiment, a plurality of through holes are provided on the inner wall of the first cavity, and the plurality of through holes include a first through hole, a second through hole, and a third through hole. The first through hole connects the first cavity and the first chamber, the second through hole connects the first cavity and the second chamber, and the third through hole connects the first cavity and the third chamber.

[0016] In one embodiment, the DC filter module is provided with a first conductive member, one end of which is connected to the circuit board through the first through hole, the AC filter module is provided with a second conductive member, one end of which is connected to the circuit board through the second through hole, and the magnetic element module is provided with a third conductive member, one end of which is connected to the circuit board through the third through hole.

[0017] In one embodiment, the plurality of chambers are sequentially spaced apart along the width direction of the box.

[0018] In one embodiment, the sealing member includes a first sealing cover and a second sealing cover, wherein the first sealing cover seals the circuit board in the first cavity;

[0019] The second sealing cover includes a first cover plate, a second cover plate and a third cover plate, and the multiple chambers are respectively a first chamber, a second chamber and a third chamber. The first cover plate encloses the DC filter module in the first chamber, the second cover plate encloses the AC filter module in the second chamber, and the third cover plate encloses the magnetic element module in the third chamber.

[0020] In one embodiment, the first cover plate is installed in the first chamber, and a side of the first cover plate away from the first side is on the same plane as the second side; the second cover plate is installed in the second chamber, and a side of the second cover plate away from the first side is on the same plane as the second side; the third cover plate is installed in the third chamber, and a side of the third cover plate away from the first side is on the same plane as the second side.

[0021] In one embodiment, the on-board charger further includes a plurality of connection terminals, and the plurality of connection terminals are fixed on the box body and / or the sealing member.

[0022] In one embodiment, the multiple terminals include a first terminal, a second terminal, and a third terminal, one end of the first terminal penetrates into the first cavity and is electrically connected to the circuit board, one end of the second terminal penetrates into the first cavity and is electrically connected to the DC filter module, and one end of the third terminal penetrates into the second cavity and is electrically connected to the AC filter module.

[0023] In one embodiment, the end of the first terminal away from the circuit board is connected to the vehicle system through a wire, the end of the second terminal away from the DC filter module is connected to the vehicle's power battery through a wire to output power to the power battery, and the end of the third terminal away from the AC filter module is connected to the vehicle's charging port socket through a wire.

[0024] In one embodiment, the first, second, and third wiring terminals are located at the same end of the lengthwise direction of the box; alternatively, the first, second, and third wiring terminals are located at the same end of the lengthwise direction of the sealing member. In one embodiment, the box is a metal box, and the first and second sealing covers are both metal sealing covers.

[0025] In a second aspect, the present application also provides a vehicle-mounted power supply device, including a vehicle-mounted converter, a high-voltage distribution box and the vehicle-mounted charger as described above.

[0026] In one embodiment, the on-board converter is used to convert the high-voltage side energy of the vehicle's power battery into low-voltage side energy, the high-voltage distribution box is used to distribute the high-voltage electrical energy of the power battery, and the on-board charger is connected between the vehicle's charging port socket and the power battery and is used to charge the power battery. In a third aspect, the present application also provides a vehicle, comprising a vehicle body, a power battery, a charging port socket, and the on-board power supply device as described above, wherein the on-board power supply device, the power battery, and the charging port socket are installed on the vehicle body, the on-board charger is connected between the vehicle's charging port socket and the power battery, and the on-board charger is used to charge the power battery.

[0027] The on-board charger provided in the embodiment of the present application forms a first cavity and a second cavity by respectively recessing the first and second side surfaces on opposite sides of the housing, so that a circuit board and a filter module are respectively accommodated in the first cavity and the second cavity. The circuit board and the filter module are isolated from each other by the housing itself, and the circuit board and the filter module are respectively enclosed in the first cavity and the second cavity by a seal, thereby achieving isolation between the circuit board and the filter module, thereby improving the shielding effect of the filter module and enhancing the electromagnetic compatibility (EMC) of the on-board charger as a whole. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] FIG1 is a perspective view of an on-board charger according to an embodiment of the present application.

[0030] FIG2 is a bottom view of FIG1 .

[0031] FIG3 is a cross-sectional view taken along line AA in FIG2 .

[0032] FIG4 is a three-dimensional diagram of a box body according to an embodiment of the present application.

[0033] FIG5 is an exploded view of an on-board charger according to an embodiment of the present application.

[0034] FIG6 is another exploded view of an on-board charger according to an embodiment of the present application.

[0035] FIG. 7 is a bottom view of FIG. 4 .

[0036] FIG8 is a cross-sectional view taken along line BB in FIG7 .

[0037] FIG9 is a schematic structural diagram of a vehicle-mounted power supply device according to an embodiment of the present application.

[0038] FIG10 is a schematic structural diagram of a vehicle according to an embodiment of the present application.

[0039] Explanation of the accompanying symbols: 100, box body; 110, first side; 120, second side; 130, first cavity; 131, first through hole; 132, second through hole; 133, third through hole; 140, second cavity; 141, first chamber; 142, second chamber; 143, third chamber; 200, circuit board; 300, filter module; 310, DC filter module; 320, AC filter module; 400, first sealing cover; 500, second sealing cover; 510, first cover plate; 520, second cover plate; 530, third cover plate; 600, magnetic element module; 610 , third conductive member; 620, first conductive member; 630, second conductive member; 700, first terminal; 800, second terminal; 900, third terminal; 1000, vehicle; 1001, vehicle body; 1002, power battery; 10, car windshield; 1003, on-board power supply device; 1004, on-board converter; 1006, high-voltage distribution box; 1008, on-board charger; 1010, charging port socket. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments of 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.

[0041] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be an intermediate component. When a component is referred to as being "connected to" another component, it may be directly connected to the other component or there may be an intermediate component.

[0042] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by those skilled in the art to which this application belongs. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used in this application includes any and all combinations of one or more of the relevant listed items.

[0043] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0044] With the increasing demand for energy conservation, emission reduction, and air pollution control, the automotive industry needs to transform its energy structure as soon as possible. Currently, new energy vehicles are gradually being commercialized in the market, and electric vehicles and hybrid vehicles are the main force of new energy vehicles, with huge future development potential and market demand. As an important component of the electric vehicle charging system, the on-board power supply includes an on-board charger (OBC), an on-board DC / DC (direct current to direct current) converter, and a high-voltage power distribution unit (PDU). The on-board charger is a charger fixedly installed on the electric vehicle, which uses AC power as input and outputs DC power to directly charge the power battery 1002, thereby achieving safe and automatic charging of the electric vehicle power battery 1002.

[0045] In the prior art, the electromagnetic interference (EMI) filter module of an on-board charger is installed in the same large aluminum alloy cavity as the main power board. A shielding cover is installed between the EMI filter module and the main power board to shield the EMI filter module. However, when using this method, there is a gap between the shielding cover and the box body, which has a poor shielding effect on the EMI filter module and affects the electromagnetic compatibility (EMC) index of the entire device.

[0046] 9 and 10 , the present application provides a vehicle 1000 comprising a vehicle body 1001 and an onboard power supply unit 1003 mounted on the vehicle body 1001. The onboard power supply unit 1003 performs the important function of converting and transmitting AC and DC energy, providing power conversion support for the electric vehicle 1000. The vehicle 1000 also includes a windshield 10.

[0047] The present application provides a vehicle-mounted power supply device 1003, including a vehicle-mounted converter 1004, a high-voltage distribution box 1006 and a vehicle-mounted charger 1008. The vehicle-mounted power supply device 1003 integrates the vehicle-mounted converter 1004, the high-voltage distribution box 1006 and the vehicle-mounted charger 1008, which is called a "small three-electric" system. Among them, the working principle of the vehicle-mounted converter (for example, the vehicle-mounted DC / DC converter) is to convert the high-voltage side energy of the power battery 1002 into low-voltage side energy, and supply power to the low-voltage electrical equipment of the entire vehicle (such as windows, wipers, lights, instrument panels, etc.) and low-voltage batteries. The high-voltage distribution box (PDU) 1006 is mainly responsible for the distribution of high-voltage electrical energy of the power battery 1002 and the overload and short-circuit protection of the high-voltage circuit. The on-board charger 1008 mainly functions to meet the slow charging needs of the electric vehicle 1000. The on-board charger 1008 is connected between the charging port socket 1010 of the vehicle 1000 and the power battery 1002. The working principle of the on-board charger 1008 is to convert single-phase AC power 220V or three-phase AC power 380V into high-voltage DC power that can be used by the power battery 1002 during the AC charging process according to the control signal of the Battery Management System (BMS), thereby charging the power battery 1002.

[0048] With reference to Figures 1, 2, 3, 4, and 5, the present application provides an on-board charger 1008, comprising a housing 100, a circuit board 200, a filter module 300, and a seal. The housing 100 comprises a first side surface 110 and a second side surface 120 disposed opposite each other. A first cavity 130 is recessed from the first side surface 110. A second cavity 140 is recessed from the second side surface 120. The first cavity 130 and the second cavity 140 are spaced apart. The circuit board 200 is disposed in the first cavity 130, and the filter module 300 is disposed in the second cavity 140. The filter module 300 is electrically connected to the circuit board 200. The seal is connected to the housing 100 to enclose the circuit board 200 in the first cavity 130 and the filter module 300 in the second cavity 140.

[0049] The on-board charger 1008 of the present application is connected between the slow charging socket of the charging port of the vehicle 1000 and the power battery 1002 .

[0050] When the electric vehicle 1000 is charged using slow charging, the on-board charger 1008 can convert AC power into DC power to achieve high-voltage DC charging of the power battery 1002. Among them, electromagnetic compatibility (EMC) refers to the ability of a device or system to operate in accordance with requirements in its electromagnetic environment and not generate intolerable electromagnetic interference to any device in its environment. Electromagnetic compatibility EMC includes two requirements: on the one hand, it means that the electromagnetic interference (Electromagnetic Disturbance) generated by the device to the environment in the normal operation process cannot exceed a certain limit; on the other hand, it means that the device has a certain degree of immunity to the electromagnetic interference in the environment, that is, electromagnetic susceptibility (EMS).

[0051] Specifically, the on-board charger 1008 of the present application is recessed into a first cavity 130 on the side of the first side 110 facing the second side 120, and is recessed into a second cavity 140 on the side of the second side 120 facing the first side 110, and the first cavity 130 and the second cavity 140 are spaced apart, so that the circuit board 200 and the filter module 300 are respectively accommodated in the first cavity 130 and the second cavity 140. The circuit board 200 and the filter module 300 are isolated by the box 100 itself, and the circuit board 200 and the filter module 300 are respectively enclosed in the first cavity 130 and the second cavity 140 by a seal, thereby achieving isolation between the circuit board 200 and the filter module 300, thereby improving the shielding effect of the filter module 300, and reducing the electromagnetic interference of the circuit board 200 to the filter module 300, improving the electromagnetic compatibility (EMC) of the on-board charger 1008, and improving the charging efficiency of the electric vehicle 1000.

[0052] Among them, the seal includes a first sealing cover 400 and a second sealing cover 500. The box body 100 can be a metal box body. The first sealing cover 400 and the second sealing cover 500 can both be metal sealing covers, illustratively, they can be aluminum alloy. While ensuring the structural strength of the charger, the electromagnetic waves are reflected, absorbed or scattered, thereby reducing the propagation and impact of electromagnetic waves. The first sealing cover 400 is connected to the first side 110 by screws. The circuit board 200 is a power board. The power board includes a high-power amplifier, a power management circuit and a voltage stabilizing circuit. The power board can convert the input low voltage and low current into a high voltage and high current output signal, realize the stable output of the power supply and the control of the output power, and can effectively protect the safety and stable operation of electronic equipment. The filter module 300 of the present application is electrically connected to the circuit board 200. The filter module 300 realizes the input and output of power supply, reduces interference in the power supply, and provides clean power supply to the power battery 1002 of the vehicle 1000. The filter module 300 converts the external input low-voltage power supply into a suitable high-voltage power supply through the circuit board 200 to ensure the normal operation of the power tool and the car.

[0053] With reference to Figures 1, 5, 6, 7, and 8, the length direction of the housing 100 is X, the width direction of the housing 100 is Y, and the height direction of the housing 100 is Z. The first side surface 110 and the second side surface 120 are spaced apart along the height direction Z of the housing 100. The inner wall of the first cavity 130 and the inner wall of the second cavity 140 have a spacing d in the height direction Z of the housing 100, and d is greater than zero. The housing 100 of the embodiment of the present application is integrally arranged, and the portion of the housing 100 located between the first cavity 130 and the second cavity 140 isolates the circuit board 200 and the filter module 300, that is, the circuit board 200 and the filter module 300 are isolated by the structure of the housing 100 itself, thereby simplifying the structure of the on-board charger 1008 and improving the shielding effect of the circuit board 200 and the filter module 300.

[0054] The on-board charger 1008 of the present application also includes a magnetic element module 600. The filter module 300 includes a DC filter module 310 and an AC filter module 320. The second cavity 140 includes a plurality of mutually isolated chambers. Specifically, the plurality of mutually isolated chambers include a first chamber 141, a second chamber 142, and a third chamber 143. The DC filter module 310 is disposed in the first chamber 141. The AC filter module 320 is disposed in the second chamber 142. The magnetic element module 600 is disposed in the third chamber 143. The magnetic element module 600 is electrically connected to the circuit board 200. Specifically, the DC filter module 310 and the AC filter module 320 are fixed to the first chamber 141 and the second chamber 142, respectively, by screws. The magnetic element module 600 is encapsulated in the third chamber 143 with potting glue to achieve the fixation of the magnetic element module 600. The second cavity 140 is divided into a plurality of chambers for respectively accommodating the DC filter module 310 , the AC filter module 320 and the magnetic component module 600 , thereby further improving the shielding effect of the onboard charger 1008 .

[0055] 5 and 6 , the on-board charger 1008 of the present application further includes a plurality of connection terminals. The plurality of connection terminals are fixed to the housing 100 and / or the seal. One end of one of the connection terminals penetrates into the first cavity 130 and is electrically connected to the circuit board 200, while one end of another connection terminal penetrates into the second cavity 140 and is electrically connected to the DC filter module 310 and the AC filter module 320. Specifically, the plurality of connection terminals may all be fixed to the housing 100 or the seal, or some may be fixed to the housing 100 and others to the seal. The circuit board 200 is connected to the vehicle 1000 system via a wire connected to one of the connection terminals, and the DC filter module 310 and the AC filter module 320 may share another connection terminal. It should be noted that sharing another connection terminal means that the DC filter module 310 and the AC filter module 320 are mounted on the same connection terminal, but the shared connection terminal is separated into DC and AC connection sections.

[0056] In one embodiment, three wiring terminals are provided, namely a first wiring terminal 700, a second wiring terminal 800, and a third wiring terminal 900. One end of the first wiring terminal 700 penetrates into the first cavity 130 and is electrically connected to the circuit board 200. One end of the second wiring terminal 800 penetrates into the first cavity 141 and is electrically connected to the DC filter module 310. One end of the third wiring terminal 900 penetrates into the second cavity 142 and is electrically connected to the AC filter module 320. The end of the first wiring terminal 700 away from the circuit board 200 is connected to the system of the vehicle 1000 via a wire. The end of the second wiring terminal 800 away from the DC filter module 310 is connected to the power battery 1002 of the vehicle 1000 via a wire to output power to the power battery 1002. The end of the third wiring terminal 900 away from the AC filter module 320 is connected to the charging port socket 1010 of the vehicle 1000 via a wire to enable power input. Preferably, the first wiring terminal 700 , the second wiring terminal 800 and the third wiring terminal 900 are located at the same end of the box body 100 in the length direction X to facilitate wiring.

[0057] In one embodiment, the inner wall of the first cavity 130 is provided with a plurality of through holes. Each through hole connects the first cavity 130 with one of the chambers. The plurality of through holes include a first through hole 131, a second through hole 132, and a third through hole 133. The first through hole 131 connects the first cavity 130 with the first chamber 141. The second through hole 132 connects the first cavity 130 with the second chamber 142. The third through hole 133 connects the first cavity 130 with the third chamber 143. The DC filter module 310 is provided with a first conductive member 620, one end of which passes through the first through hole 131 and is connected to the circuit board 200. The AC filter module 320 is provided with a second conductive member 630, one end of which passes through the second through hole 132 and is connected to the circuit board 200. The magnetic element module 600 is provided with a third conductive member 610, one end of which passes through the third through hole 133 and is connected to the circuit board 200. Specifically, the circuit board 200 is installed in the first cavity 130 and is located above the DC filter module 310, the AC filter module 320, and the magnetic component module 600. A first through-hole 131, a second through-hole 132, and a third through-hole 133 are provided in the housing 100 for the passage of the first conductive member 620, the second conductive member 630, and the third conductive member 610, respectively. This facilitates connection between the DC filter module 310, the AC filter module 320, and the magnetic component module 600 and the circuit board 200. It should be noted that the dimensions of the first through-hole 131, the second through-hole 132, and the third through-hole 133 only need to be large enough to allow the passage of the first conductive member 620, the second conductive member 630, and the third conductive member 610, respectively.

[0058] Optionally, the first chamber 141, the third chamber 143, and the second chamber 142 are sequentially spaced apart along the width direction Y of the housing 100. The second sealing cover 500 includes a first cover plate 510, a second cover plate 520, and a third cover plate 530. The first cover plate 510 encloses the DC filter module 310 within the first chamber 141. The second cover plate 520 encloses the AC filter module 320 within the second chamber 142. The third cover plate 530 encloses the magnetic element module 600 within the third chamber 143. Specifically, the first cover plate 510, the second cover plate 520, and the third cover plate 530 are separately disposed. The first cover plate 510, the second cover plate 520 and the third cover plate 530 cover the first chamber 141, the second chamber 142 and the third chamber 143 respectively, so that the first chamber 141, the second chamber 142 and the third chamber 143 are arranged at intervals to respectively accommodate the DC filter module 310, the AC filter module 320 and the magnetic element module 600, and the DC filter module 310, the AC filter module 320 and the magnetic element module 600 are sealed by the first cover plate 510, the second cover plate 520 and the third cover plate 530 respectively to enhance the shielding effect of the DC filter module 310, the AC filter module 320 and the magnetic element module 600.

[0059] In one embodiment, the first cover plate 510 is installed in the first chamber 141, and the side of the first cover plate 510 away from the first side 110 is on the same plane as the second side 120. The second cover plate 520 is installed in the second chamber 142, and the side of the second cover plate 520 away from the first side 110 is on the same plane as the second side 120. The third cover plate 530 is installed in the third chamber 143, and the side of the third cover plate 530 away from the first side 110 is on the same plane as the second side 120. Specifically, the first cover plate 510 and the box body 100, the second cover plate 520 and the box body 100, and the third cover plate 530 and the box body 100 can all be connected by stir friction welding, so that the first cover plate 510, the second cover plate 520, and the third cover plate 530 are firmly connected to the box body 100 and have a good sealing effect. After installation, the exposed side surfaces of the first cover plate 510 , the second cover plate 520 and the third cover plate 530 are on the same plane as the second side surface 120 of the box body 100 , thereby facilitating welding of the first cover plate 510 , the second cover plate 520 and the third cover plate 530 to the box body 100 .

[0060] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside" are based on the orientation or positional relationship described in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0061] The above disclosure is only a preferred embodiment of the present application, and certainly cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present application are still within the scope covered by the present application.

Claims

1. A vehicle-mounted charger (1008), characterized in that: include: A box body (100), the box body (100) comprising a first side surface (110) and a second side surface (120) arranged opposite to each other, a first cavity (130) being recessed from the first side surface (110), a second cavity (140) being recessed from the second side surface (120), and the first cavity (130) being spaced from the second cavity (140); A circuit board (200) is disposed in the first cavity (130); A filter module (300) is disposed in the second cavity (140), and the filter module (300) is electrically connected to the circuit board (200); A sealing member is connected to the box (100) to seal the circuit board (200) in the first cavity (130) and the filter module (300) in the second cavity (140).

2. The vehicle-mounted charger (1008) according to claim 1, characterized in that: The first side surface (110) and the second side surface (120) are spaced apart along the height direction of the box body (100), and an inner wall of the first cavity (130) and an inner wall of the second cavity (140) are spaced apart in the height direction of the box body (100).

3. The on-board charger (1008) according to claim 1, characterized in that: The on-board charger (1008) further includes a magnetic element module (600), the filter module (300) includes a DC filter module (310) and an AC filter module (320), the second cavity (140) includes a plurality of mutually isolated chambers, the plurality of chambers include a first chamber (141), a second chamber (142), and a third chamber (143), the DC filter module (310) is disposed in the first chamber (141), the AC filter module (320) is disposed in the second chamber (142), and the magnetic element module (600) is disposed in the third chamber (143).

4. The on-board charger (1008) according to claim 3, characterized in that: A plurality of through holes are provided on the inner wall of the first cavity (130), and the plurality of through holes include a first through hole (131), a second through hole (132), and a third through hole (133); the first through hole (131) connects the first cavity (130) and the first chamber (141); the second through hole (132) connects the first cavity (130) and the second chamber (142); and the third through hole (133) connects the first cavity (130) and the third chamber (143).

5. The on-board charger (1008) according to claim 4, characterized in that: The DC filter module (310) is provided with a first conductive member (620), one end of which passes through the first through hole (131) to be connected to the circuit board (200); the AC filter module (320) is provided with a second conductive member (630), one end of which passes through the second through hole (132) to be connected to the circuit board (200); and the magnetic element module (600) is provided with a third conductive member, one end of which passes through the third through hole (133) to be connected to the circuit board (200).

6. The on-board charger (1008) according to claim 3, characterized in that: The plurality of chambers are arranged in sequence and at intervals along the width direction of the box body (100).

7. The on-board charger (1008) according to claim 3, characterized in that: The sealing member comprises a first sealing cover (400) and a second sealing cover (500); the first sealing cover (400) seals the circuit board (200) in the first cavity (130); The second sealing cover (500) comprises a first cover plate (510), a second cover plate (520) and a third cover plate (530); the first cover plate (510) seals the DC filter module (310) in the first chamber (141); the second cover plate (520) seals the AC filter module (320) in the second chamber (142); and the third cover plate (530) seals the magnetic element module (600) in the third chamber (143).

8. The on-board charger (1008) according to claim 7, characterized in that: The first cover plate (510) is installed in the first chamber (141), and a side of the first cover plate (510) away from the first side (110) is on the same plane as the second side (120); the second cover plate (520) is installed in the second chamber (142), and a side of the second cover plate (520) away from the first side (110) is on the same plane as the second side (120); the third cover plate (530) is installed in the third chamber (143), and a side of the third cover plate (530) away from the first side (110) is on the same plane as the second side (120).

9. The on-board charger (1008) according to claim 3, characterized in that: The on-board charger (1008) further comprises a plurality of connection terminals, wherein the plurality of connection terminals are fixed on the box (100) and / or the sealing member.

10. The on-board charger (1008) according to claim 9, characterized in that: The plurality of connection terminals include a first connection terminal (700), a second connection terminal (800), and a third connection terminal (900); one end of the first connection terminal (700) penetrates into the first cavity (130) to be electrically connected to the circuit board (200); one end of the second connection terminal (800) penetrates into the first cavity (141) to be electrically connected to the DC filter module (310); and one end of the third connection terminal (900) penetrates into the second cavity (142) to be electrically connected to the AC filter module (320).

11. The on-board charger (1008) according to claim 10, characterized in that: One end of the first terminal (700) away from the circuit board (200) is connected to the system of the vehicle (1000) through a wire, one end of the second terminal (800) away from the DC filter module (310) is connected to the power battery (1002) of the vehicle (1000) through a wire to output power to the power battery (1002), and one end of the third terminal (900) away from the AC filter module (320) is connected to the charging port socket (1010) of the vehicle (1000) through a wire.

12. The on-board charger (1008) according to claim 11, characterized in that: The first terminal (700), the second terminal (800), and the third terminal (900) are located at the same end of the length direction of the box (100); or, the first terminal (700), the second terminal (800), and the third terminal (900) are located at the same end of the length direction of the seal.

13. The vehicle-mounted charger (1008) according to claim 7, characterized in that: The box body (100) is a metal box body (100), and the first sealing cover (400) and the second sealing cover (500) are both metal sealing covers.

14. A vehicle-mounted power supply device (1003), characterized in that: It comprises an on-board converter (1004), a high-voltage distribution box (1006) and an on-board charger (1008) as claimed in any one of claims 1 to 13.

15. The vehicle-mounted power supply device (1003) according to claim 14, characterized in that: The on-board converter (1004) is used to convert the high-voltage side energy of the power battery (1002) of the vehicle (1000) into low-voltage side energy, the high-voltage distribution box (1006) is used to distribute the high-voltage electric energy of the power battery (1002), and the on-board charger (1008) is connected between the charging port socket (1010) of the vehicle (1000) and the power battery (1002) and is used to charge the power battery (1002).

16. A vehicle (1000), characterized in that: The vehicle comprises a vehicle body (1001), a power battery (1002), a charging port socket (1010), and a vehicle-mounted power supply device (1003) according to claim 14 or 15, wherein the vehicle-mounted power supply device (1003), the power battery (1002), and the charging port socket (1010) are installed on the vehicle body (1001), and the vehicle-mounted charger (1008) is connected between the charging port socket (1010) and the power battery (1002) of the vehicle (1000), and the vehicle-mounted charger (1008) is used to charge the power battery (1002).

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