Car power supply

Abstract

This application relates to the field of automotive power conversion technology, specifically to an on-board power supply, including a housing, a cover plate, a filter module, a power board, and a control module. The housing has a shielded cavity, the filter module is disposed in the shielded cavity, and the power board is disposed at the opening of the shielded cavity and electrically connected to the filter module. The control module includes a control circuit board and control elements disposed on the control circuit board. The control circuit board is electrically connected to the power board. The control module and the shielded cavity are located on the same side of the power board, and the control module is located outside the shielded cavity. The cavity wall of the shielded cavity is electrically connected to the cover plate, so that the cavity wall of the shielded cavity can shield between the control elements and the filter module. This eliminates the need for a shielding component between the filter module and the power board, thereby reducing the size of the on-board power supply and increasing its power density.

Description

Technical Field

[0001] This application relates to the field of automotive power conversion technology, specifically to an on-board power supply. Background Technology

[0002] As an indispensable part of new energy vehicles, the on-board power supply is the core of energy conversion and management, playing the role of an "energy hub." Its main responsibilities include: "charging" the vehicle, "powering" the entire vehicle, and "discharging" externally like a "mobile power station." Currently, to maximize interior passenger space, new energy vehicles require the miniaturization of relevant components. Therefore, on-board power supplies are constantly pursuing increasingly higher power densities. The power density of an on-board power supply refers to the power output per unit volume. For a given output power, a higher power density results in a smaller on-board power supply volume, which is more conducive to increasing the interior passenger space of new energy vehicles. Therefore, how to improve the power density of on-board power supplies is a technical problem that researchers constantly need to consider. Utility Model Content

[0003] This application provides an on-board power supply with higher power density.

[0004] To achieve one of the above objectives, some embodiments of this application provide a vehicle-mounted power supply, including: The housing has a shielded receiving cavity; Cover plate; A filter module, wherein the filter module is disposed in the shielding cavity; A power board is disposed at the opening of the shielding cavity and is electrically connected to the filter module; And a control module, the control module including a control circuit board and control elements disposed on the control circuit board, the control circuit board being electrically connected to the power board; The control module and the shielding cavity are located on the same side of the power board, and the control module is located outside the shielding cavity. The cavity wall of the shielding cavity is electrically connected to the cover plate, so that the cavity wall of the shielding cavity can shield between the control element and the filter module.

[0005] In one embodiment, the filtering module includes an input filtering element group and an output filtering element group. The input filtering element group is used to filter the current input to the vehicle power supply, and the output filtering element group is used to filter the current output by the vehicle power supply. Each input filter element of the input filter element group is welded to the power board, and / or each output filter element of the output filter element group is welded to the power board.

[0006] In one embodiment, the shielding cavity includes a first chamber and a second chamber spaced apart. The input filter element group is disposed in the first chamber, and the output filter element group is disposed in the second chamber. The vehicle power supply includes a cooling structure located between the first chamber and the second chamber. A power tube is provided on the side of the power board facing the cooling structure, so that the cooling structure can cool the power tube. The cavity walls of the first chamber and the second chamber are both electrically connected to the cover plate. The control module is located between the first chamber and the cooling structure, or the control module is located between the second chamber and the cooling structure.

[0007] In one embodiment, the control circuit board has a back side facing away from the cooling structure, and the control element is disposed on the back side of the control circuit board.

[0008] In one embodiment, a first electrical connection portion is provided on the cavity wall located between the first chamber and the cooling structure, the first electrical connection portion being electrically connected to the cover plate, or the first electrical connection portion being electrically connected to the power board; And / or, A second electrical connection portion is provided on the cavity wall located between the second chamber and the cooling structure. The second electrical connection portion is electrically connected to the cover plate, or the second electrical connection portion is electrically connected to the power board.

[0009] In one embodiment, the power transistor has a heat-conducting surface facing the cooling structure, the portion of the cooling structure opposite to the heat-conducting surface has a thermally conductive insulating coating, and / or the vehicle power supply further includes a thermally conductive insulating sheet disposed between the power transistor and the cooling structure.

[0010] In one embodiment, the cooling structure is a protruding structure disposed on the bottom plate of the housing and protruding into the housing, wherein the protruding direction of the cooling structure is consistent with the orientation of the cavity opening.

[0011] In one embodiment, the control circuit board and the power board have an angle between them.

[0012] In one embodiment, the connection structure between the power board and the control circuit board includes pin headers on one of the power board and the control circuit board, and pinholes on the other, wherein the pin headers and the pinholes are inserted into each other.

[0013] In one embodiment, the power board has a connection circuit having a first contact on the side of the power board facing the cover plate and a second contact on the side of the power board facing the shielding cavity, the cover plate being electrically connected to the first contact and the cavity wall being electrically connected to the second contact; And / or, The cavity wall has a protruding structure that protrudes toward the power plate, the power plate has a clearance channel, and the protruding structure passes through the clearance channel and is electrically connected to the cover plate.

[0014] According to the above embodiments, the vehicle power supply is equipped with a filter module, which enables the filtering function of the vehicle power supply. In traditional vehicle power supplies, the control element of the control circuit is located on the power board. When the control element is working, it will interfere with the operation of the filter module. Therefore, traditional vehicle power supplies will set a stamped shield between the filter module and the power board. However, in the vehicle power supply of this application, a control module is formed by setting a control circuit board and setting the control element on the control circuit board. The control module and the shielding cavity are located on the same side of the power board, eliminating the direct setting of the control element on the power board. Furthermore, the control module is located outside the shielding cavity, and the cavity wall of the shielding cavity is electrically connected to the cover plate. The cavity wall of the shielding cavity has a shielding effect between the control element and the filter module. Thus, there is no need to set a shield between the power board and the cavity opening of the shielding cavity to deal with the interference of the control element, reducing the size of the vehicle power supply in the thickness direction of the power board. Compared with the power board, the size of the control circuit board in which the control element is set is relatively small. The control module will not occupy a large space in the housing. After the size of the vehicle power supply in the thickness direction of the power board is reduced, the overall volume of the vehicle power supply is reduced, and the power density of the vehicle power supply is improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the vehicle power supply in some embodiments of this application; Figure 2 This is an exploded view of the structure of the vehicle power supply in some embodiments of this application; Figure 3 This is an exploded view of the structure in some embodiments of the present application where the cover plate of the vehicle power supply is separated from the housing; Figure 4 This is a schematic diagram of the structure of the vehicle power supply housing in some embodiments of this application; Figure 5 This is a cross-sectional view of the vehicle power supply in some embodiments of this application; Figure 6 This is an exploded view of the structure of the vehicle power supply with the cover plate, power board and housing separated in some embodiments of this application; Figure 7 This is a schematic diagram of the structure of the filter module and the power board connected to form an assembly in some embodiments of this application.

[0016] Label Explanation: 1. Vehicle power supply; 10. Shell; 101. Base plate; 102. Circumferential sidewall; 103. Shell cavity; 104. Shielding cavity; 1041. Cavity wall; 10411. First protrusion structure; 10412. Second protrusion structure; 1042. Cavity opening; 1043. First chamber; 1044. Second chamber; 105. Cooling structure; 1051. Flow channel; 106. First interface; 107. Second interface; 108. Control shielding cavity; 109. Signal and output filtering shielding cavity; 20. Filter module; 201. Input filter component group; 202. Output filter component group; 203. Pins; 30. Power board; 301. Clearance passage; 40. Control module; 401. Control circuit board; 4011. Back side; 402. Pin header; 50. HVAC high-voltage input connector; 60. HVDC high-voltage output connector; 70. LVDC output connector; 80. Signal connector; 90. Cover plate; 100. Screw; 110. Transformer assembly; 120. Power transistor.

[0017] In the above-mentioned related figures, F1 is the first direction, F2 is the second direction, and F3 is the third direction. Detailed Implementation

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present invention. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present invention are not shown or described in the specification. This is to avoid obscuring the core parts of the present invention with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.

[0019] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.

[0020] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this utility model, unless otherwise specified, include both direct and indirect connections (linkages).

[0021] The on-board power supply is the "energy heart" and "power manager" of new energy vehicles. When a new energy vehicle is connected to an AC charging station (such as a home slow charger), the on-board charger (OBC) of the on-board power supply can convert the alternating current (AC) from the power grid into the high-voltage direct current (DC) required by the power battery. The power battery outputs high-voltage electricity of 300V-800V, but low-voltage electronic devices such as headlights, central control screens, sensors, and motor controllers require 12V or 24V voltage. The DC-DC converter of the on-board power supply is responsible for stepping down the high-voltage DC to a stable low-voltage DC to power these electronic devices and simultaneously charge the 12V small battery.

[0022] Traditional vehicle power supplies include a housing and an input filter module, an output filter module, and a power board housed within the housing. The input filter module processes the current input to the vehicle power supply, and the output filter module processes the current output from the vehicle power supply. The input filter module includes an input filter element group and an input filter board (circuit board), and the output filter module includes an output filter element group and an output filter board (circuit board). The input filter module is electrically connected to the power board through the input filter board, and the output filter module is electrically connected to the power board through the output filter board.

[0023] The power board is the core hardware platform responsible for performing power conversion. It processes the information transmitted to the vehicle power supply and handles information within the vehicle power supply itself. The power board also houses control circuitry; in traditional vehicle power supplies, the control elements are located on the power board. Noise generated by these control elements can couple to the filter modules, affecting the overall EMI (Electro-Magnetic Interference) results. Furthermore, the high-frequency switching of the power devices on the power board can also affect the control circuitry, leading to signal distortion and control function failure. Since the operation of the control elements can affect the normal operation of the input and output filter modules (electromagnetic interference), a shielding structure is required between the power board and the input and output filter modules. Traditional vehicle power supplies use separate shielding for the input and output filter modules, typically stamped metal shielding plates.

[0024] With the development of new energy vehicles, there is an increasing pursuit of driving and riding comfort, which requires new energy vehicles to have larger passenger and riding space. The main means to increase passenger and riding space is to miniaturize vehicle components. Therefore, as an indispensable component of new energy vehicles, the development of on-board power supplies requires increasingly higher power density values, that is, to minimize the size of on-board power supplies while meeting power requirements.

[0025] To improve the power density of automotive power supplies, this application provides an automotive power supply with an additional control circuit board outside the power board. Control components are mounted on the control circuit board to form a control module. The control module has communication control, power management, parameter measurement and calibration, drive control, charging control, wake-up and sleep control, and various protection functions. The automotive power supply housing has a shielded cavity, within which a filter module is housed. The control module and the shielded cavity are arranged side-by-side, allowing the cavity wall to shield between the control components and the filter module. This eliminates the need for a separate shield between the filter module and the power board, reducing the overall size of the automotive power supply by decreasing the thickness of the power board, thereby increasing its power density.

[0026] Please refer to Figure 1 , Figure 2 and Figure 3 The vehicle power supply 1 includes a housing 10, a filter module 20, a power board 30 (MPB, MainPower Board), and a control module 40. Those skilled in the art will understand that the vehicle power supply 1 also includes other structures and components that implement its functions, which will not be listed or described here. In the following description of the structure and operation of the vehicle power supply 1, relevant structures and components will be introduced and described accordingly.

[0027] Please continue to refer to this. Figure 1 and Figure 3 The vehicle power supply 1 also includes an HVAC high-voltage input connector 50 (HVAC, High-Voltage Alternating Current), an HVDC high-voltage output connector 60 (HVDC, High-Voltage Direct Current), an LVDC output connector 70 (LVDC, Low-Voltage Direct Current), and a signal connector 80, all mounted on the housing 10. The HVAC high-voltage input connector 50 is used to connect to high-voltage AC power, typically 220V AC. The HVDC high-voltage output connector 60 is used to output high-voltage DC power. The LVDC output connector 70 is used to output low-voltage DC power. The signal connector 80 is used to receive signals from other components of the vehicle.

[0028] Please refer to the following for the structure of housing 10. Figure 1 , Figure 2 , Figure 3 and Figure 4 The housing 10 includes a base plate 101 and a circumferential sidewall 102. The circumferential sidewall 102 is connected to the periphery of the base plate 101 and cooperates with the base plate 101 to form a cavity 103. In some embodiments, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 The housing 10 is generally cubic in shape. The depth direction of the cavity 103 is defined as the first direction F1 (which is also the thickness direction of the vehicle power supply 1, or the height direction), the width direction of the housing 10 is defined as F2, and the length direction of the housing 10 is defined as F3. The first direction F1, the second direction F2, and the third direction F3 are all mutually perpendicular. In the following description, the vehicle power supply 1 will be described using the first direction F1 as the vertical direction.

[0029] Please refer to Figure 2 and Figure 4 The upper end of the housing 10 is open. The housing 10 has a shielding cavity 104, and a portion of the cavity wall 1041 of the shielding cavity 104 is a partition wall disposed within the housing cavity 103. The partition wall cooperates with a portion of the circumferential sidewall 102 to define a portion of the housing cavity 103 as the shielding cavity 104. In some embodiments, the housing 10 is made entirely of metal material. As an example, the housing 10 is made of aluminum alloy, so that the shielding cavity 104 can accommodate the filter module 20 while shielding against external electromagnetic interference. The housing 10 can be integrally die-cast or assembled from multiple parts. Of course, in other embodiments, the housing 10 can also be a composite structure, such as injection-molded based on a metal frame, with the internal metal frame enabling the housing 10 to shield against electromagnetic interference.

[0030] Please refer to Figure 5 and Figure 6 The filter module 20 is housed within the shielded cavity 104. The filter module 20 enables the vehicle power supply 1 to filter both the input and output currents. The composition of the filter module 20 will be described later.

[0031] For settings of power board 30, please refer to... Figure 3 and Figure 5The power board 30 is a circuit board, exemplarily a printed circuit board (PCB). The power board 30 is disposed at the cavity opening 1042 of the shielding cavity 104 and is electrically connected to the filter module 20. The power board 30 and the filter module 20 are electrically connected to form a PCBA (printed circuit board assembly).

[0032] The control module 40 is used to implement the corresponding control functions of the vehicle power supply 1. Please refer to... Figure 5 The control module 40 includes a control circuit board 401 (MCB board, MCB stands for Main Control Board) and control elements (not shown in the figure) disposed on the control circuit board 401. The control elements are electrically connected to the control circuit board 401. The control module 40 is electrically connected to the power board 30. For an example of the connection structure between the control module 40 and the power board 30, please refer to [reference needed]. Figure 5 The control circuit board 401 has a pin header 402, and the power board 30 has pinholes corresponding to the pin header 402. The control module 40 and the power board 30 are electrically connected by the insertion of the pin header 402 into the pinholes, thereby achieving signal interconnection between the control module 40 and the power board 30. In some other embodiments, the pin header 402 can be located on the power board 30, and the pinholes can be located on the control circuit board 401. Exemplarily, the pin header 402 can be a pin, which requires soldering after insertion into the pinhole. The pin header 402 can also be a plug-in type, in which case the control module 40 and the power board 30 only need to be plugged in. The control module 40 and the power board 30 can also be connected via a flexible wire.

[0033] Please continue to refer to this. Figure 2 and Figure 5 The control module 40 and the shielding cavity 104 are located on the same side of the power board 30, and the control module 40 is located outside the shielding cavity 104. Based on the orientation in the figure, the control element and the shielding cavity 104 are located on the lower side of the power board 30, and the filter module 20 is located inside the shielding cavity 104, also on the lower side of the power board 30, so that the cavity wall 1041 of the shielding cavity 104 is located between the control element and the filter module 20.

[0034] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 6The vehicle power supply 1 also includes a cover plate 90, which is fixedly connected to the housing 10 by screws 100, sealing the opening of the housing 10. The cavity wall 1041 of the shielding cavity 104 is electrically connected to the cover plate 90 to form a shielding structure, so that the cavity wall 1041 has a shielding effect, preventing or minimizing electromagnetic interference to the filter module 20 when the control components are working.

[0035] Based on the above structure, the vehicle power supply 1 of this application has a control circuit board 401 that is structurally independent of the power board 30. The corresponding control elements are disposed on the control circuit board 401 to form a control module 40. The control module 40 and the shielding cavity 104 (and the filter module 20 therein) are on the same side of the power board 30. Compared with the control elements being integrated into the power board 30, the cavity wall 1041 of the shielding cavity 104 of this application is electrically connected to the cover plate 90, which can provide anti-interference shielding between the control elements and the shielding cavity 104, achieving good EMC (Electromagnetic Compatibility) shielding performance. In this way, it is not necessary to set up shielding components and insulating films at the cavity opening 1042 of the shielding cavity 104 to prevent interference from the control elements. This allows the power board 30 to be set closer to the cavity opening 1042 of the shielding cavity 104, that is, to reduce the setting position of the power board 30 and reduce the thickness of the vehicle power supply 1.

[0036] Those skilled in the art will understand, refer to Figure 2 , Figure 5 and Figure 6 The purpose of the control circuit board 401 is to house the control components. Compared to the power board 30, the control circuit board 401 is relatively small, and the overall volume of the control module 40 is not very large. Since the control module 40 is housed within the housing 10, there is no need to significantly adjust the dimensions of the housing 10. In other words, installing the control module 40 will not cause a significant increase in the volume of the vehicle power supply 1. Therefore, reducing the thickness effectively reduces the volume of the vehicle power supply 1 and increases its power density.

[0037] Furthermore, it has achieved lower BOM (Bill of Materials) costs, simplified assembly processes, and lower factory manufacturing costs, thereby achieving the goal of comprehensive cost reduction and enhancing the product's market competitiveness.

[0038] In some embodiments, the control element may include at least one of the following: a CAN (Controller Area Network) chip, a watchdog timer (WTD), an integrated circuit (IC), a DSP (Digital Signal Processor) chip, a microcontroller unit (MCU), a relay, a voltage regulator, etc.

[0039] Please continue to refer to this. Figure 2 , Figure 5 , Figure 6 and Figure 7 The filter module 20 includes an input filter element group 201 (AC filter module, AC stands for Alternating Current) and an output filter element group 202 (HVDC filter, HVDC stands for High-Voltage Direct Current). The input filter element group 201 is used to filter the input current of the vehicle power supply 1, and the output filter element group 202 is used to filter the output current of the vehicle power supply 1. In some embodiments, based on the independent arrangement of the control module 40 relative to the power board 30, the power board 30 has more space and position to arrange other components. Please refer to... Figure 2 , Figure 3 In this embodiment, each input filter element of the input filter element group 201 is directly connected to the power board 30, that is, the pins 203 of each input filter element are soldered to the power board 30. Thus, there is no need to set up a corresponding filter circuit board for the input filter element group 201. Compared to a structure where the filter circuit board and the power board 30 are stacked, the vehicle power supply 1 in this application can further reduce its thickness. In some embodiments, each output filter element of the output filter element group 202 is directly connected to the power board 30, that is, the pins 203 of each output filter element are also soldered to the power board 30.

[0040] In some other embodiments, only the pins 203 of each input filter element in the input filter element group 201 can be soldered to the power board 30, or only the pins 203 of each output filter element in the output filter element group 202 can be soldered to the power board 30. Correspondingly, the power board 30 can be a split structure, with part corresponding to the input filter element group 201 and part corresponding to the output filter element group 202. Taking the example of only the pins 203 of each input filter element in the input filter element group 201 being soldered to the power board 30, the mounting position of the part of the power board 30 corresponding to the input filter element group 201 can be lower, thereby reducing the size of the vehicle power supply 1 to a certain extent. Of course, the input filter element group 201 and the output filter element group 202 can be electrically connected to the power board 30 through corresponding filter circuit boards, but this will result in a relatively limited increase in the power density of the vehicle power supply 1.

[0041] In some embodiments, the input filtering element of the input filtering element group 201 includes at least one of a fuse, a relay, a filter capacitor, a common-mode inductor, a varistor, and a surge protector (ceramic gas discharge tube). The output filtering element of the output filtering element group 202 includes at least one of a filter capacitor and a common-mode inductor.

[0042] Please refer to Figure 2 , Figure 4 , Figure 5 and Figure 6 In some embodiments, the shielding cavity 104 comprises two parts: a first chamber 1043 for accommodating the input filter element group 201, and a second chamber 1044 for accommodating the output filter element group 202. The first chamber 1043 and the second chamber 1044 are located at opposite ends of the housing 10 in the second direction F2, and are spaced apart. The first chamber 1043 is correspondingly disposed with the HVAC high-voltage input connector 50, and the opening on the housing 10 for mounting the HVAC high-voltage input connector 50 communicates with the first chamber 1043. The second chamber 1044 is correspondingly disposed with the HVDC high-voltage output connector 60, and the opening on the housing 10 for mounting the HVDC high-voltage output connector 60 communicates with the second chamber 1044. In other embodiments, the first chamber 1043 and the second chamber 1044 may be arranged without spacing, separated by a partition.

[0043] Please refer to Figure 4The first chamber 1043 is formed by the cooperation of a cavity wall 1041 located within the shell cavity 103 and a portion of a circumferential side wall 102. The second chamber 1044 is formed by the cooperation of another portion of a cavity wall 1041 located within the shell cavity 103 and a portion of a circumferential side wall 102. That is, a portion of the cavity wall 1041 of the first chamber 1043 and the second chamber 1044 is formed by a portion of the circumferential side wall 102 of the shell 10. In some other embodiments, the cavity walls 1041 of the first chamber 1043 and the second chamber 1044 are completely located within the shell cavity 103.

[0044] Please refer to Figure 6 The vehicle power supply 1 has a power transistor 120 located on the lower side of the power board 30. The power transistor 120 acts as an "electronic switch" and can connect and disconnect the circuit at an extremely fast speed (tens of thousands to hundreds of thousands of times per second). In conjunction with components such as transformers, it can efficiently convert one voltage of DC power into another voltage of DC power (DC-DC) or AC power (DC-AC).

[0045] The power transistor 120 generates a significant amount of heat during operation. Please refer to the following: Figure 4 and Figure 5 The housing 10 also has a cooling structure 105 located within the housing cavity 103 for cooling the heat-generating components (such as the power transistor 120, transformer, etc.) of the vehicle power supply 1. For example, please refer to... Figure 5 The cooling structure 105 is a liquid-cooled structure, and the cooling structure 105 has flow channels 1051 for the flow of coolant. Correspondingly, please refer to... Figure 4 The housing 10 has a first interface 106 and a second interface 107 that communicate with the flow channel 1051. One of the first interface 106 and the second interface 107 is a liquid inlet for connecting to the coolant supply pipeline, and the other is a liquid outlet for the coolant after absorbing heat to flow out of the cooling structure 105.

[0046] In some embodiments, the power transistor 120 has a heat-conducting surface, which faces the cooling structure 105 in the assembled state. To achieve rapid heat conduction and ensure insulation, in some embodiments, the portion of the cooling structure 105 facing the power transistor 120 has a thermally conductive insulating coating, such as a diamond-like carbon film, a polymer-based composite coating, etc., and / or a thermally conductive insulating sheet, such as a thermally conductive insulating ceramic sheet, a novel carbon-based material sheet, etc., is placed between the power transistor 120 and the cooling structure 105. The heat-conducting surface of the power transistor 120 is in contact with the thermally conductive insulating coating or the thermally conductive insulating sheet, enabling rapid heat conduction to the cooling structure 105.

[0047] As an example, please refer to Figure 4The cooling structure 105 is a U-shaped structure protruding relative to the base plate 101. One end of the U-shaped cooling structure 105 is connected to the circumferential sidewall 102, and the first interface 106 and the second interface 107 are located on the outside of the circumferential sidewall 102. The flow channel 1051 inside the U-shaped cooling structure 105 is also U-shaped. This not only ensures that the flow channel 1051 has a long length, but also makes the first interface 106 and the second interface 107 located on the same side of the housing 10, which facilitates the connection between the vehicle power supply 1 and the liquid cooling system of the new energy vehicle.

[0048] Please continue to refer to this. Figure 4 and Figure 5 In some embodiments, in the second direction F2, the cooling structure 105 is located between the first chamber 1043 and the second chamber 1044, with a gap between the cooling structure 105 and the cavity wall 1041 of the second chamber 1044. This gap is defined as a mounting cavity, which constitutes a control shielding cavity 108. The control module 40 is disposed within the mounting cavity, i.e., within the control shielding cavity 108. In other embodiments, the cooling structure 105 is separated from the cavity wall 1041 of the first chamber 1043, and this gap is defined as a mounting cavity, with the control module 40 disposed within this mounting cavity.

[0049] In some embodiments, please refer to Figure 4 Within the housing 10, a signal and output filtering shielding cavity 109 is provided on the side of the cooling structure 105 facing away from the first interface 106 and the second interface 107. An LVDC filter board (Low Voltage Direct Current) can be installed inside, providing shielding protection for the internally installed LVDC filter board. A portion of the circumferential sidewall 102, a portion of the cooling structure 105, and a portion of the cavity wall 1041 cooperate to define a control shielding cavity 108 within the housing 10.

[0050] In some embodiments, please refer to Figure 2 , Figure 4 The cavity opening 1042 is located on the side of the shielding cavity 104 facing away from the bottom plate 101. The cooling structure 105 is a protruding structure provided on the bottom plate 101 and protruding into the cavity 103 relative to the bottom plate 101. The protruding direction is the same as the orientation of the cavity opening 1042. That is, the orientation of the cavity opening 1042 is consistent with the orientation of the opening between the cooling structure 105 and the cavity wall 1041. In this way, after the filter module 20 and the control module 40 are installed on the power board 30, the whole assembly can be inserted into the housing 10 from top to bottom, which improves the convenience of assembling the vehicle power supply 1.

[0051] Please refer to Figure 5In some embodiments, the control circuit board 401 and the power board 30 have an included angle, which can be an acute angle or a right angle, preferably a right angle. In the right-angled state, the control circuit board 401 and the power board 30 are perpendicularly arranged, and their combined cross-section is "T"-shaped, thus minimizing the space occupied by the control module 40. Those skilled in the art will understand that the power transistor 120 can interfere with the control components during operation. To reduce the interference of the power transistor 120 on the control components, in some embodiments, please refer to... Figure 5 The control circuit board 401 has a back side 4011 of the back cooling structure 105, and the control element is located on the back side 4011 of the control circuit board 401.

[0052] In addition to interfering with the control components, the power transistor 120 also interferes with the filter module 20. Therefore, in some embodiments, to reduce or eliminate the interference of the power transistor 120 on the input filter element group 201, the cavity wall 1041 of the first chamber 1043 is electrically connected to the cover plate 90. More specifically, the cavity wall 1041 located between the first chamber 1043 and the cooling structure 105 has a first electrical connection portion, which is electrically connected to the cover plate 90. Alternatively, the cover plate 90 is electrically connected to the power board 30, and the first electrical connection portion is electrically connected to the cover plate 90 through its electrical connection to the power board 30.

[0053] Similarly, to reduce or eliminate the interference of the power transistor 120 on the output filter element group 202, the cavity wall 1041 of the second chamber 1044 is electrically connected to the cover plate 90. More specifically, the cavity wall 1041 located between the second chamber 1044 and the cooling structure 105 has a second electrical connection part, which is directly electrically connected to the cover plate 90. Alternatively, the cover plate 90 is electrically connected to the power board 30, and the second electrical connection part is indirectly electrically connected to the cover plate 90 through its electrical connection with the power board 30.

[0054] As an example, please refer to the following: Figure 3 and Figure 4 The cavity wall 1041 located between the first chamber 1043 and the cooling structure 105 has a first protrusion structure 10411 protruding toward the side where the power plate 30 is located. The first protrusion structure 10411 constitutes a first electrical connection portion. Correspondingly, please refer to... Figure 5 and Figure 6 The power board 30 has a clearance channel 301 that runs through the power board 30. The first protrusion structure 10411 passes through the clearance channel 301 and is electrically connected to the cover plate 90 to realize the grounding of the cover plate 90, forming a shielding structure between the input filter element group 201 and the power tube 120.

[0055] Please continue to refer to this. Figure 3 and Figure 4The cavity wall 1041 located between the second chamber 1044 and the cooling structure 105 has a second protrusion structure 10412 protruding toward the side where the power plate 30 is located. The second protrusion structure 10412 constitutes a second electrical connection portion. Correspondingly, please refer to... Figure 5 and Figure 6 The power board 30 has a clearance channel 301 that runs through the power board 30. The second protrusion structure 10412 passes through the clearance channel 301 and is electrically connected to the cover plate 90 to realize the grounding of the cover plate 90, forming a shielding structure between the input filter element group 201 and the power tube 120.

[0056] In some other embodiments, the power board 30 has a connection circuit with a first contact on the side of the power board 30 facing the cover plate 90 and a second contact on the side of the power board 30 facing the shielding cavity 104. There are multiple second contacts, some corresponding to the cavity wall 1041 between the first chamber 1043 and the cooling structure 105, and some corresponding to the cavity wall 1041 between the second chamber 1044 and the cooling structure 105. The contacts can be metal-plated, such as copper. The first and second electrical connection portions can be the upper end surfaces (conductive contact surfaces) of the corresponding positions of the cavity wall 1041. The cover plate 90 is electrically connected to the first contact, and the first and second electrical connection portions are respectively electrically connected to the corresponding second contacts. To ensure the reliability of the electrical connection between the cover plate 90 and the first contact, conductive foam and / or SMD (Surface Mounted Device) grounding springs can be provided at the first contact. Of course, conductive foam and / or SMD grounding springs can also be provided between the second contact and the corresponding cavity wall 1041.

[0057] Please refer to Figure 6 The vehicle power supply 1 also includes a transformer assembly 110 located within the space enclosed by the U-shaped cooling structure 105. Regarding the installation method of the transformer assembly 110 into the housing 10, one feasible method is to first solder the transformer assembly 110 onto the power board 30, forming a module together with other components such as the filter module 20, and then snap this module into the housing 10. The soldering method for the transformer assembly 110 onto the power board 30 can be wave soldering. Another feasible method is to first assemble the transformer assembly 110 into the housing 10, and then snap the power board 30 in place, using selective soldering to achieve power connection. The latter method is suitable when a thermally conductive insulating ceramic sheet is provided between the cooling structure 105 and the power tube 120, preventing the transformer assembly 110 from bumping against the thermally conductive insulating ceramic sheet during the snap-in process with the power board 30.

[0058] This document describes various exemplary embodiments with reference to them. However, those skilled in the art will recognize that changes and modifications can be made to the exemplary embodiments without departing from the scope of this document. For example, various operational steps and components for performing operational steps can be implemented in different ways depending on the specific application or considering any number of cost functions associated with the operation of the system (e.g., one or more steps can be deleted, modified, or combined with other steps).

[0059] While the principles herein have been illustrated in various embodiments, numerous modifications to the structures, arrangements, proportions, elements, materials, and components, particularly suited to specific environments and operational requirements, may be used without departing from the principles and scope of this disclosure. These modifications and other alterations or alterations will be included within the scope of this document. Those skilled in the art will recognize that many changes can be made to the details of the above embodiments without departing from the fundamental principles of this invention.

Claims

1. A vehicle-mounted power supply, characterized in that, include: The housing has a shielded receiving cavity; Cover plate; A filter module, wherein the filter module is disposed in the shielding cavity; A power board is disposed at the opening of the shielding cavity and is electrically connected to the filter module; And a control module, the control module including a control circuit board and control elements disposed on the control circuit board, the control circuit board being electrically connected to the power board; The control module and the shielding cavity are located on the same side of the power board, and the control module is located outside the shielding cavity. The cavity wall of the shielding cavity is electrically connected to the cover plate, so that the cavity wall of the shielding cavity can shield between the control element and the filter module.

2. The vehicle power supply as described in claim 1, characterized in that, The filtering module includes an input filtering element group and an output filtering element group. The input filtering element group is used to filter the current input to the vehicle power supply, and the output filtering element group is used to filter the current output by the vehicle power supply. Each input filter element of the input filter element group is welded to the power board, and / or each output filter element of the output filter element group is welded to the power board.

3. The vehicle power supply as described in claim 2, characterized in that, The shielding cavity includes a first chamber and a second chamber spaced apart. The input filter element group is disposed in the first chamber, and the output filter element group is disposed in the second chamber. The vehicle power supply includes a cooling structure located between the first chamber and the second chamber. The power board has a power tube on the side facing the cooling structure, so that the cooling structure can cool the power tube. The walls of the first chamber and the second chamber are both electrically connected to the cover plate. The control module is located between the first chamber and the cooling structure, or the control module is located between the second chamber and the cooling structure.

4. The vehicle power supply as described in claim 3, characterized in that, The control circuit board has a back side facing away from the cooling structure, and the control element is disposed on the back side of the control circuit board.

5. The vehicle power supply as described in claim 3, characterized in that, A first electrical connection portion is provided on the cavity wall located between the first chamber and the cooling structure. The first electrical connection portion is electrically connected to the cover plate, or the first electrical connection portion is electrically connected to the power board. And / or, A second electrical connection portion is provided on the cavity wall located between the second chamber and the cooling structure. The second electrical connection portion is electrically connected to the cover plate, or the second electrical connection portion is electrically connected to the power board.

6. The vehicle power supply as described in claim 3, characterized in that, The power transistor has a heat-conducting surface facing the cooling structure, and the portion of the cooling structure opposite to the heat-conducting surface has a heat-conducting insulating coating. Alternatively, the vehicle power supply may further include a heat-conducting insulating sheet disposed between the power transistor and the cooling structure.

7. The vehicle power supply as described in claim 3, characterized in that, The cooling structure is a protruding structure located on the bottom plate of the housing and protruding into the housing, with the protruding direction of the cooling structure being consistent with the orientation of the cavity opening.

8. The vehicle power supply as described in any one of claims 1-7, characterized in that, There is an angle between the control circuit board and the power board.

9. The vehicle power supply as described in claim 8, characterized in that, The connection structure between the power board and the control circuit board includes pin headers on one of the power board and the control circuit board, and pinholes on the other, wherein the pin headers and the pinholes are inserted into each other.

10. The vehicle power supply as described in any one of claims 1-6, characterized in that, The power board has a connection circuit, which has a first contact on the side of the power board facing the cover plate and a second contact on the side of the power board facing the shielding cavity. The cover plate is electrically connected to the first contact, and the cavity wall is electrically connected to the second contact. And / or, The cavity wall has a protruding structure that protrudes toward the power plate, the power plate has a clearance channel, and the protruding structure passes through the clearance channel and is electrically connected to the cover plate.

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