On-vehicle power supply device and vehicle including the same

Abstract

To provide an on-vehicle power supply device having features which achieve a simple structure, excellent heat dissipation, and high operation efficiency, and to provide a vehicle having the on-vehicle power supply device.SOLUTION: In an on-vehicle power supply device and a vehicle having the on-vehicle power supply device, the on-vehicle power supply device (100) includes a housing (110), a magnetic device (120), and a shielding assembly (130). An attachment position (111) is provided within the housing (110), and the magnetic device (120) is an integrated part and provided at the attachment position (111). The shielding assembly (130) is provided within the housing (110) and surrounds an outer periphery of the attachment position (111).SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] (CROSS REFERENCE TO RELATED APPLICATIONS) This application claims priority to a patent application filed on July 9, 2020, bearing application number 202010658596.X and entitled "On-board power supply device and vehicle having the same," the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of vehicles, and more particularly to an on-board power supply device and a vehicle having the same. [Background technology]

[0003] In the related art, the on-board power supply uses a planar design, so the structure inside the on-board power supply is complicated and it is easily affected by external signals, which reduces the operation efficiency of the on-board power supply. Summary of the Invention [Means for solving the problem]

[0004] The present disclosure aims to solve at least one of the technical problems in the prior art by providing an in-vehicle power supply device that has the characteristics of being simple in structure, excellent in heat dissipation, and high in operating efficiency.

[0005] The present disclosure further provides a vehicle having the above-mentioned on-board power supply device.

[0006] According to an embodiment of the present disclosure, there is provided an on-board power supply apparatus including a housing, a magnetic device, and a shielding assembly, wherein a mounting position is provided within the housing, the magnetic device is an integrated member and is provided at the mounting position, and the shielding assembly is provided within the housing and surrounds an outer periphery of the mounting position.

[0007] In the vehicle-mounted power supply according to the embodiment of the present disclosure, by mounting a magnetic device at the mounting position, it is easy to realize an integrated design of the magnetic device, and by protecting the magnetic device using a shielding assembly, it is possible to shield interference from external signals and improve the operational stability and safety of the vehicle-mounted power supply.

[0008] In certain embodiments, the shielding assembly defines a coolant passageway that circumscribes a periphery of the magnetic device.

[0009] In some embodiments, the shielding assembly includes a flow path member and a shielding wall, the coolant passage being defined in the flow path member, the shielding wall being spaced apart from the flow path member and positioned on a side of the flow path member away from the magnetic device.

[0010] In some embodiments, the cooling liquid passage has an open port on one side, and the shielding assembly further includes a flow path cover plate and a sealing ring, the flow path cover plate sealingly connected to the flow path member to seal the open port, and the sealing ring is interposed between the flow path cover plate and the flow path member.

[0011] In some embodiments, the flow path member includes a first sidewall and a second sidewall spaced apart from the first sidewall, the coolant passage is defined between the first sidewall and the second sidewall, the first sidewall faces the magnetic device and the second sidewall is located on a side of the first sidewall away from the magnetic device, and the distance between the first sidewall and the second sidewall gradually decreases in a direction toward the opening.

[0012] In some embodiments, the on-board power supply apparatus further includes a circuit board, a plurality of power switch transistors, and a fixing device, each of the power switch transistors being electrically connected to the circuit board, and the fixing device simultaneously fixing the plurality of power switch transistors between the flow path member and the shielding wall.

[0013] In some embodiments, the fixing device includes a fixing plate and a plurality of elastic pieces, each of which fixes one power switch transistor, has one end fixed to the fixing plate, and has the other end located on one side of the fixing plate in a thickness direction and spaced apart from the surface of the one side of the fixing plate in the thickness direction.

[0014] In some embodiments, each of the elastic pieces includes a fixed portion, a connecting portion and a crimping portion, the fixed portion is fixed to the fixed plate, the connecting portion is connected between the fixed portion and the crimping portion, the crimping portion includes a first crimping portion and a second crimping portion, one end of the first crimping portion is connected to the connecting portion and the other end of the first crimping portion extends in a direction away from the fixed plate, one end of the second crimping portion is connected to the other end of the first crimping portion and the other end of the second crimping portion extends toward the fixed plate.

[0015] In some embodiments, at least one boss is provided on the other side in the thickness direction of the fixed plate, the boss having a cross-sectional area that gradually decreases along a direction away from the fixed plate, and the boss is formed by a portion of the surface on one side in the thickness direction of the fixed plate protruding onto the surface on the other side in the thickness direction of the fixed plate.

[0016] In some embodiments, the edge of the fixing plate is provided with at least one lug extending away from the center of the fixing plate, and the fixing device further includes at least one lug plate provided on one side in a thickness direction of the lug, and the edge of the fixing plate is provided with at least one fixing lug, the free end of which extends toward the other side of the fixing plate along the thickness direction of the fixing plate.

[0017] In some embodiments, the magnetic device includes a magnetic core, a coil, a bobbin, a cable lug, and a nut, the coil being wound around the magnetic core and having a pin, the bobbin being mounted on the magnetic core, the cable lug being attached to the bobbin and connected to the pin and having a connection hole, and the nut being attached to the bobbin and having a screw hole corresponding to the position of the connection hole.

[0018] In some embodiments, the cable lug is movably attached to the bobbin such that the distance between the connection hole and the bobbin is adjustable, the cable lug includes a plate portion, a bending portion and a clamping portion, the connection hole is formed in the plate portion, the nut is provided between the plate portion and the bobbin, the bending portion has one end connected to the plate portion, protrudes toward the bobbin, is movably attached to the bobbin, and is configured in a U-shape protruding into the bobbin to form a groove, and the clamping portion is connected to the other end of the bending portion, clamps the pin and is located within the groove.

[0019] In some embodiments, the bobbin is provided with an anti-rotation groove, the nut is provided in the anti-rotation groove, and a distance between the plate portion and a bottom wall of the anti-rotation groove is greater than an axial length of the nut.

[0020] In some embodiments, the cable lug further includes a positioning protrusion, the positioning protrusion and the bending portion are respectively connected to two opposing edges of the plate portion, a positioning groove is provided in the bobbin, and the positioning protrusion engages with the positioning groove.

[0021] In some embodiments, the vehicle-mounted power supply device further includes a magnetic circuit member and at least one magnetic sheet, the magnetic core and the bobbin are supported by the magnetic circuit member, the magnetic sheet is attached to the bobbin, the magnetic sheet and the magnetic circuit member are respectively provided on opposite sides of the magnetic core, and a hook is provided on the bobbin, and the hook is hooked onto an edge of the magnetic sheet.

[0022] A vehicle according to an embodiment of the present disclosure includes the above-described on-board power supply device.

[0023] Additional aspects and advantages of the disclosure will be set forth in part in the description that follows, and in part will be obvious from the description, or may be learned by practice of the disclosure.

[0024] The above and / or additional aspects and advantages of the present disclosure will become more apparent and easier to understand by describing examples with reference to the following drawings, in which: [Brief description of the drawings]

[0025] [Figure 1] 1 is a schematic diagram of an on-board power supply device according to an embodiment of the present disclosure. [Diagram 2] 1 is a schematic perspective view of an in-vehicle power supply device according to an embodiment of the present disclosure. [Diagram 3] 1 is a schematic cross-sectional view of an on-board power supply device according to an embodiment of the present disclosure. [Figure 4] 1 is a schematic partial cross-sectional view of an on-board power supply device according to an embodiment of the present disclosure. [Diagram 5] 1 is a schematic partial cross-sectional view of an on-board power supply device according to an embodiment of the present disclosure. [Figure 6] 1 is a schematic diagram of a magnetic device according to an embodiment of the present disclosure. [Figure 7] FIG. 2 is a cross-sectional view of a magnetic device according to an embodiment of the present disclosure. [Figure 8] FIG. 2 is an exploded view of a magnetic device according to an embodiment of the present disclosure. [Figure 9] FIG. 13 is a schematic assembly diagram of a cable lug and bobbin of a magnetic device according to an embodiment of the present disclosure. [Figure 10] FIG. 2 is a schematic diagram of a cable lug of a magnetic device according to an embodiment of the present disclosure. [Figure 11] FIG. 2 is a perspective view of a fixing device for a power switch transistor according to an embodiment of the present disclosure. [Figure 12] FIG. 12 is an exploded view of the fixation device shown in FIG. [Figure 13]FIG. 2 is a perspective view of a fixing device for a power switch transistor according to an embodiment of the present disclosure. [Figure 14] FIG. 2 is a cross-sectional view of a switch transistor assembly before a power switch transistor is pressed in, according to an embodiment of the present disclosure. [Figure 15] FIG. 15 is a cross-sectional view of the switch transistor assembly shown in FIG. 14 after the power switch transistor has been pressed in. [Figure 16] FIG. 1 is a block diagram of a vehicle according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present disclosure will be described in detail. The embodiments described with reference to the drawings are merely illustrative. Hereinafter, embodiments of the present disclosure will be described in detail.

[0027] Hereinafter, with reference to FIGS. 1 to 5, an on-board power supply apparatus 100 according to an embodiment of the present disclosure will be described. The on-board power supply apparatus 100 includes a housing 110, a magnetic device 120, and a shielding assembly .

[0028] Specifically, a mounting position 111 is provided within the housing 110, and the magnetic device 120 is an integrated member and is provided at the mounting position 111. By providing the mounting position 111 inside the housing 110, the magnetic device 120 can be concentrated at the mounting position 111, thereby improving the degree of integration of the in-vehicle power supply apparatus 100. The shielding assembly 130 is provided within the housing 110 and surrounds the outer periphery of the mounting position 111, and can shield electromagnetic signals, thereby protecting the magnetic device 120.

[0029] In the vehicle-mounted power supply device 100 according to an embodiment of the present disclosure, the magnetic device 120 is mounted at the mounting position 111, which makes it easy to realize an integrated design of the magnetic device 120, and further, by protecting the magnetic device 120 using the shielding assembly 130, interference from external signals can be shielded, thereby improving the operational stability and safety of the vehicle-mounted power supply device 100.

[0030] In the embodiment shown in Fig. 3 and Fig. 4, the shielding assembly 130 defines a cooling liquid passage 131 surrounding the outer periphery of the magnetic device 120. The cooling liquid passage 131 may be filled with a cooling liquid, and when the cooling liquid flows, heat exchange occurs between the cooling liquid approaching the magnetic device 120 and the magnetic device 120, that is, the cooling liquid can cool the magnetic device 120, and can cool and dissipate heat by flowing and absorbing heat generated by the magnetic device 120. In addition, by providing the cooling liquid passage 131 so as to surround the outer periphery of the magnetic device 120, the cooling liquid passage 131 can approach more positions of the magnetic device 120, and therefore the cooling efficiency of the cooling liquid passage 131 can be improved.

[0031] 3 and 4, the shielding assembly 130 may include a flow path member 132 and a shielding wall 133. The flow path member 132 has a coolant passage 131 defined therein, and the shielding wall 133 is spaced apart from the flow path member 132 and is located on a side of the flow path member 132 that is away from the magnetic device 120. It should be understood that the flow path member 132 is closer to the magnetic device 120 than the shielding wall 133, i.e., the flow path member 132 is provided in close proximity to the magnetic device 120, and thus helps to dissipate heat from the magnetic device 120 through the coolant passage 131. By providing the shielding wall 133 on the outer periphery of the flow path member 132, the magnetic device 120 and the flow path member 132 can be protected at the same time.

[0032] 2, in some embodiments of the present disclosure, the flow path member 132 may include a first portion 1321 and a second portion 1322 spaced apart from the first portion 1321, and the magnetic device 120 is interposed between the first portion 1321 and the second portion 1322. It should be understood that the first portion 1321 is located on one side of the magnetic device 120, and the second portion 1322 is located on the other side of the magnetic device 120, so that the magnetic device 120 can be dissipated heat from multiple directions. In addition, the flow path members 132 provided on both sides of the magnetic device 120 restrict the magnetic device 120, so that the assembly stability of the magnetic device 120 can be improved.

[0033] 3 and 4, in some embodiments, the coolant passage 131 has an opening on one side, and the shielding assembly 130 further includes a flow path cover plate 134 sealingly connected to the flow path member 132 to seal the opening. This allows the coolant to be easily injected into the coolant passage 131, and on the other hand, the flow path member 132 can be simplified in structure and easily replaced and maintained by sealing the opening with the flow path cover plate 134.

[0034] In some embodiments, the flow path cover plate 134 and the flow path member 132 are welded or screwed together. In this manner, the flow path cover plate 134 and the flow path member 132 may be fixed by welding or bolting. When the flow path cover plate 134 and the flow path member 132 are connected by welding, a coolant having a high heat exchange effect is used as the coolant, so that the heat dissipation effect of the flow path member 132 can be extended, the flow path member 132 has high stability, and the occurrence of situations such as leakage of the coolant can be avoided.

[0035] When the flow path cover plate 134 and the flow path member 132 are fixed by screw connection, the efficiency of use of the coolant that exchanges heat in the coolant passage 131 is improved, thereby improving the heat dissipation effect of the flow path member 132. In addition, the flow path cover plate 134 and the flow path member 132 connected by bolts have better attachment and detachment performance, which not only improves the assembly efficiency of the flow path member 132 but also makes it easy to disassemble the flow path member 132, thereby improving the efficiency of assembly and disassembly of the flow path member 132, and therefore makes it easier to use, maintain, and repair the in-vehicle power supply device 100.

[0036] As shown in FIG. 3 and FIG. 4, in some embodiments, the shielding assembly 130 further includes a sealing ring 135 interposed between the flow path cover plate 134 and the flow path member 132. By providing the sealing ring 135 between the flow path cover plate 134 and the flow path member 132, the coolant passage 131 in the flow path member 132 has better sealing performance, and thus the situation of leakage and the like can be further avoided, and the reliability of the use of the coolant passage 131 can be further improved. In addition, the sealing ring 135 interposed between the flow path cover plate 134 and the flow path member 132 can facilitate the assembly of the flow path cover plate 134 and improve the assembly efficiency of the flow path cover plate 134. In addition, when the flow path cover plate 134 is disassembled, the sealing ring 135 reduces the adhesion resistance between the flow path cover plate 134 and the flow path member 132, and improves the convenience of disassembling the flow path cover plate 134, and thus the use, maintenance and upkeep of the in-vehicle power supply device 100 can be further improved.

[0037] 3 and 4, the flow path member 132 may include a first sidewall 1323 and a second sidewall 1324 spaced apart from the first sidewall 1323, between which a coolant passage 131 is defined, the first sidewall 1323 faces the magnetic device 120, the second sidewall 1324 is located on the side of the first sidewall 1323 away from the magnetic device 120, and the distance 1324 between the first sidewall 1232 and the second sidewall gradually decreases in the direction toward the opening. By defining the coolant passage 131 in this manner so that the upper portion is narrow and the lower portion is wide, the flow path member 132 can be easily demolded and the yield of the flow path member 132 can be improved. In addition, the first side wall 1323 facing the magnetic device 120 can improve heat exchange with the magnetic device 120 and improve the cooling efficiency of the flow path member 132, thereby improving the operating efficiency of the in-vehicle power supply device 100.

[0038] As shown in FIG. 5, in some embodiments, the in-vehicle power supply device 100 further includes a circuit board (not shown), a power switch transistor 202, and a fixing device, where the power switch transistor 202 is electrically connected to the circuit board and disposed between the flow path member 132 and the shielding wall 133, and the fixing device 152 fixes the multiple power switch transistors 202 between the flow path member 132 and the shielding wall 133 simultaneously.

[0039] The power switch transistor 202 can control the on / off of the circuit of the circuit board. Thus, by providing the power switch transistor 202 on the shielding wall 133, the shielding wall 133 plays a good supporting role for the power switch transistor 202, and the power switch transistor 202 can better control the on / off of the circuit of the circuit board, and the shielding wall 133 also shields the power switch transistor 202 from the influence of an external signal, so that the power switch transistor 202 can more accurately control the circuit board.

[0040] In addition, a fixing device 152 is further provided on the outside of the power switch transistor 202, and the fixing device 152 serves to press-fit the power switch transistor 202, and is deformed during the press-fit process. The deformed fixing device 152 has an axial pressure, and the power switch transistor 202 and the flow path member 132 are closely attached to each other, so that the power switch transistor 202 has high stability. In addition, after the fixing device 152 is provided to fix the power switch transistor 202, the fixing device 152 has high heat exchange capacity, so that the heat generated by the power switch transistor 202 during its operation can be transferred from the fixing device 152, and the operating temperature of the power switch transistor 202 can be reduced, and the operating efficiency of the power switch transistor 202 can be improved. In addition, the fixing device 152 can fix a plurality of power switch transistors 202 at once, and has high fixing efficiency, and the fixing flow of the fixing device 152 can be simplified, and the assembly efficiency of the in-vehicle power supply device 100 can be improved.

[0041] 11-15, a fixing device 152 for a power switch transistor 202 according to an embodiment of the present disclosure will now be described.

[0042] In addition, the fixing device 152 fixes the power switch transistor 202 to the flow path member 132 of the shielding assembly 130. Specifically, the power switch transistor 202 is in close contact with the second side wall 1324, and the fixing device 152 presses the power switch transistor 202 against the second side wall 1324. The second side wall 1324 provides a support for the power switch transistor 202. The power switch transistor 202 transfers heat generated during operation to the second side wall 1324, thereby reducing the operating temperature of the power switch transistor 202. The operation efficiency of the switch transistor 202 can be improved, the first side wall 1323 of the flow path member 132 is on the side away from the power switch transistor 202 and can absorb heat generated by the magnetic device 120 during operation, and the shielding assembly 130 further includes a shielding wall 133, which is on the other side away from the power switch transistor 202 and can shield external interference signals including interference signals for the power switch transistor 202 and interference signals for the magnetic device 120 inside the power switch transistor 202. This embodiment only describes the close contact and operation state of the power switch transistor 202 with the second side wall 1324 under the action of the fixing device 152, and the first side wall 1323 and the shielding wall 133 have been described in the context and will not be described here.

[0043] As shown in FIGS. 11 to 13, a fixing device 152 for a power switch transistor 202 according to an embodiment of the present disclosure includes a fixing plate 1 and a plurality of elastic pieces 2. As shown in FIG.

[0044] Specifically, each elastic piece 2 fixes one power switch transistor 202, and one end (for example, the lower end in FIG. 11) is fixed to the fixed plate 1. In this case, the one end of each elastic piece 2 is fixed to the fixed plate 1 and does not move. The other end (for example, the upper end in FIG. 11) of each elastic piece 2 is located on one side in the thickness direction of the fixed plate 1, and the other end of each elastic piece 2 is spaced apart from the surface of the one side in the thickness direction of the fixed plate 1.

[0045] 14 and 15, when the fixing device 152 for the power switch transistor 202 is applied to the switch transistor assembly 200, an operator only needs to insert the fixing plate 1 provided with the multiple elastic pieces into the shielding assembly 130 to tightly attach the multiple power switch transistors 202 to the inner wall, for example, the second side wall 1324, of the shielding assembly 130 to which the multiple power switch transistors 202 are attached. In the above process, the other ends of the multiple elastic pieces 2 can move toward the fixing plate 1 under the action of the corresponding power switch transistors 202, and due to the elastic action of the elastic pieces 2 themselves, the other ends of the multiple elastic pieces 2 can apply an action force toward the second side wall 1324 to the corresponding power switch transistors 202, thereby pressing the multiple power switch transistors 202 against the second side wall 324. As a result, the plurality of power switch transistors 202 can be tightly attached to the second side wall 1324, so that the plurality of power switch transistors 202 can effectively dissipate heat and extend the service life of the plurality of power switch transistors 202. As a result, compared with the conventional method of locking the elastic piece 2 with a corresponding screw for each power switch transistor 202 to achieve press-fitting and fixing, the fixing device 152 including the fixing plate 1 and the plurality of elastic pieces 2 has an integral structure and can press-fit the plurality of power switch transistors 202 at one time, so that the assembly process is simplified, the assembly efficiency is improved, the subsequent disassembly is facilitated, and the integral disassembly can be achieved at one time.

[0046] In a fixing device 152 for a power switch transistor 202 according to an embodiment of the present disclosure, a fixing plate 1 and a plurality of elastic pieces 2 are provided, one end of each elastic piece 2 is fixed to the fixing plate 1, and the other end of each elastic piece 2 is located on one side in the thickness direction of the fixing plate 1 and is spaced apart from the surface of the one side in the thickness direction of the fixing plate 1. The fixing device 152 has a simple structure, and when the fixing device 152 is applied to the switch transistor assembly 200, the assembly efficiency of the fixing device 152 is high.

[0047] As shown in FIG. 11, each elastic piece 2 includes a fixed portion 21, a crimping portion 23, and a connecting portion 22, the fixed portion 21 is fixed to the fixed plate 1, and each elastic piece 2 is fixedly connected to the fixed plate 1 by the fixed portion 21. The crimping portion 23 is located on the one side in the thickness direction of the fixed plate 1 and is spaced apart from the surface of the one side in the thickness direction of the fixed plate 1. When the fixing device 152 is applied to the switch transistor assembly 200, each elastic piece 2 can crimp the corresponding power switch transistor 202 by the crimping portion 23 so as to be in close contact with the inner wall of the shielding assembly 130, for example, the second side wall 1324. The connecting portion 22 is connected between the fixed portion 21 and the crimping portion 23. By providing in this manner, it is possible to effectively ensure that each elastic piece 2 has sufficient elasticity, and therefore the power switch transistor 202 can be reliably crimped into the shielding assembly 130.

[0048] 11, the crimping portion 23 includes a first crimping portion 231 and a second crimping portion 232, one end of the first crimping portion 231 (for example, the lower end in FIG. 11) is connected to the connecting portion 22, the other end of the first crimping portion 231 (for example, the upper end in FIG. 11) extends in a direction away from the fixed plate 1, one end of the second crimping portion 232 (for example, the lower end in FIG. 11) is connected to the other end of the first crimping portion 231, and the other end of the second crimping portion 232 (for example, the upper end in FIG. 11) extends in the direction toward the fixed plate 1. In this case, the connection portion between the first crimping portion 231 and the second crimping portion 232 is suitable for engagement with the power switch transistor 202. Thus, by providing the crimping portion 23 to include the first crimping portion 231 and the second crimping portion 232, the fixing device 152 can be installed more smoothly in the shielding assembly 130, and the end of the crimping portion 23 is less likely to directly contact the power switch transistor 202, thereby extending the service life of the power switch transistor 202. Preferably, there is a smooth transition between the first crimping portion 231 and the second crimping portion 232. This can increase the contact area between the crimping portion 23 and the power switch transistor 202, making the force of the crimping portion 23 on the power switch transistor 202 more uniform, effectively ensuring that the entire power switch transistor 202 is tightly attached to the second sidewall 1324, and has a high heat dissipation effect.

[0049] Preferably, the length of the second crimping portion 232 may be smaller than the length of the first crimping portion 231, which can ensure that the crimping portion has sufficient force against the power switch transistor 202 and can reduce costs by saving materials.

[0050] 11-13 together with Fig. 14-15, the included angle between the first crimping portion 231 and the fixed plate 1 is larger than the included angle between the connecting portion 22 and the fixed plate 1, in which case the inclination angle of the first crimping portion 231 is larger than that of the connecting portion 22, and the connection point between the first crimping portion 231 and the connecting portion 22 can smoothly transition. By providing in this way, each elastic piece 2 can gradually extend in the direction away from the fixed plate 1, ensuring sufficient elasticity and extending the service life of the elastic piece 2.

[0051] As shown in Figs. 11 and 12, the multiple elastic pieces 2 constitute at least one elastic piece group, and the elastic piece group includes at least two elastic pieces 2 arranged in parallel, and one end of the at least two elastic pieces 2 is fixed to the fixed plate 1, and the other ends are spaced apart from each other. By providing them in this manner, processing is easy and costs can be saved. For example, in the example of Figs. 11 and 12, seven elastic piece groups are shown, and the seven elastic piece groups are arranged in order at intervals along the length direction of the fixed plate 1, and each elastic piece group includes two elastic pieces 2 provided along the length direction of the fixed plate 1, and the lower ends of the two elastic pieces 2 are connected and the upper ends are spaced apart from each other so as to be suitable for engagement with the corresponding power switch transistors 202. At least two elastic pieces 2 of each elastic piece group may be integrally molded.

[0052] The seven elastic piece groups shown in Figures 11 and 12 may include three first elastic piece groups and two second elastic piece groups, and the elastic pieces 2 of each elastic piece group may have different lengths and widths from the elastic pieces 2 of each second elastic piece group to accommodate power switch transistors 202 of different sizes.

[0053] Preferably, each elastic piece 2 may be riveted (as shown in Figs. 11 and 12), welded (not shown), or connected by a screw (not shown) to the fixed plate 1, which simplifies the manufacturing process. Naturally, the present disclosure is not limited thereto, and as shown in Fig. 13, the multiple elastic pieces 2 may be integrally molded with the fixed plate 1. For example, the multiple elastic pieces 2 may be formed by punching out from the fixed plate 1.

[0054] In some embodiments of the present disclosure, as shown in Figs. 12 to 15, at least one boss 4 is provided on the other side in the thickness direction of the fixed plate 1. The boss 4 protrudes from the surface of the other side in the thickness direction of the fixed plate 1. In this manner, in the process of assembling the fixing device 152 in the shielding assembly 130, the boss 4 engages with the shielding wall 133 facing the second side wall 1324 in the shielding assembly 130. In this case, since the boss 4 can engage with the elastic piece 2, the elastic piece 2 can apply a larger acting force to the power switch transistor 202, and the power switch transistor 202 can be more closely attached to the second side wall 1324 of the shielding assembly 130.

[0055] 14 and 15 , the boss 4 has a gradually decreasing cross-sectional area along a direction away from the fixed plate 1. Specifically, at least one side of the boss 4 may be formed as a slope 121, for example, at least a lower side of the boss 4 may be formed as a slope 121, so that the fixing device 152 can be more smoothly assembled into the shielding assembly 130.

[0056] 11 and 12 in addition to Figs. 13 and 14, the boss 4 may be formed so as to protrude from a part of the surface on one side in the thickness direction of the fixed plate 1 to the surface on the other side in the thickness direction of the fixed plate 1. For example, in order to simplify the machining process of the boss 4 and reduce costs, the boss 4 may be formed by a punching method. Naturally, the boss 4 may be a solid structure provided on the surface on the other side in the thickness direction of the fixed plate 1.

[0057] 11 and 12, in some embodiments of the present disclosure, the boss 4 may be multiple, and the multiple bosses 4 are provided at intervals along the arrangement direction of the multiple elastic pieces 2. Thus, by providing the multiple bosses 4, it is possible to effectively ensure that each of the multiple elastic pieces applies a large acting force to the corresponding multiple power switch transistors 202. It should be understood that the number of bosses 4 may be smaller than the number of elastic pieces 2, as long as it is ensured that the multiple elastic pieces 2 press the corresponding multiple power switch transistors 202 into the shielding assembly 130.

[0058] In some embodiments of the present disclosure, as shown in FIG. 12, the edge of the fixed plate 1 is provided with at least one lug 5 extending away from the center of the fixed plate 1. For example, in the example of FIG. 12, two lugs 5 are shown, and both of the lugs 5 may be located on the same plane as the fixed plate 1. When the fixing device 152 needs to be inserted into the shielding assembly 130, the operator can hold the two lugs 5 by hand and insert the fixing device 152 into the shielding assembly 130 from top to bottom, so that the multiple elastic pieces 2 are in close contact with the second side wall 1324 of the shielding assembly 130. When the fixing device 152 needs to be removed, the two lugs 5 can be pulled upward, so that the fixing device 152 can be easily pulled out. Thus, by providing the lugs 5, the fixing device 152 can be attached and detached more conveniently.

[0059] Although two lugs 5 are shown in Figures 11-12 for illustrative purposes, a person skilled in the art can obviously understand after reading the technical solution of the present application that the solution can be applied to a technical solution of three or more lugs 5, which also falls within the scope of protection of the present disclosure.

[0060] In some embodiments of the present disclosure, as shown in FIG. 11 and FIG. 12, the fixing device 152 includes at least one lug plate 51, and the lug plate 51 is provided on one side of the lug 5 in the thickness direction. For example, as shown in FIG. 12, the lug plate 51 may include a first part and a second part connected to each other, and the first part of the lug plate 51 may have a length equal to the length of the lug 5, a width equal to the width of the lug 5, and the width of the second part is larger than the width of the first part. During assembly, the first part of the lug plate 51 corresponds to the lug 5, and the second part of the lug plate 51 may be fixed to the fixing plate 1 by riveting or welding. Thus, the lug 5 can be reinforced by providing the lug plate 51, so that the structural strength of the lug 5 can be improved. The number of the lug plates 51 may be equal to or less than the number of the lugs 5. It should be understood that the actual number of the lug plates 51 may be specifically set according to actual requirements to better meet actual applications.

[0061] In some embodiments of the present disclosure, referring to Fig. 11 and Fig. 14, at least one fixing lug 3 is provided on the edge of the fixed plate 1. Thus, by providing the fixing lug 3, the fixing device 152 can be fixedly connected to the shielding assembly 130 by the fixing lug 3. The free end of the fixing lug 3 extends toward the other side of the fixed plate 1 along the thickness direction of the fixed plate 1. By providing in this manner, after the fixing device 152 is assembled to the shielding assembly 130, the fixing lug 3 is located at the top of the shielding assembly 130 and exposed to the outside of the shielding assembly 130. In this case, the fixing lug 3 can be penetrated by a screw fastener and then connected to the shielding assembly 130 by a screw, so that the assembly can be easily performed, and compared with the conventional method of providing an opening at the bottom of the shielding assembly 130 or providing many through holes in the wiring board at the top, the installation space required for the fixing device 152 is small, and there is no need to ensure the operation space required for fixing the fixing device 152. The fixing lug 3 also has a positioning function, specifically, when the fixing lug 3 is assembled so as to contact the top of the shielding assembly 130, it indicates that the fixing device 152 is installed in a predetermined position, in which case the elastic piece 2 tightly presses the power switch transistor 202 against the second side wall 1324 of the shielding assembly 130.

[0062] 14 and 15, a switch transistor assembly 200 according to an embodiment of the present disclosure includes a shielding assembly 130, a plurality of power switch transistors 202, and a fixing device 152. The fixing device 152 is the fixing device 152 for the power switch transistors 202 according to the embodiment of the present disclosure.

[0063] Specifically, the multiple power switch transistors 202 are all provided in the shielding assembly 130. The fixing device 152 is provided in the shielding assembly 130, and the other ends of the multiple elastic pieces 2 of the fixing device 152 press the multiple power switch transistors 202 into the shielding assembly 130.

[0064] For the switch transistor assembly 200 according to the embodiment of the present disclosure, by using the above-mentioned fixing device 152, which can be easily assembled in the shielding assembly 130, the assembly is easy, and the multiple power switch transistors 202 can be engaged with the second side wall 1324 in the shielding assembly 130 under the action of the multiple elastic pieces 2, thereby better realizing heat dissipation and extending the service life of the power switch transistors 202.

[0065] 14 and 15, in some embodiments of the present disclosure, at least one boss 4 is provided on the other side in the thickness direction of the fixed plate 1, and a guide surface 2013 is provided on the surface facing the boss 4 of the shielding assembly 130, and the guide surface 2013 extends obliquely toward the boss 4 along the insertion direction of the fixing device 152. Thus, by providing the guide surface 2013 having a guiding effect on the boss 4, the fixing device 152 can be smoothly assembled to the shielding assembly 130.

[0066] As shown in FIG. 14, before the multiple power switch transistors 202 are pressed against each other, the boss 4 of the fixed plate 1 and the guide surface 2013 of the shielding wall 133 of the shielding assembly 130 are shifted up and down, and in this case, the multiple elastic pieces 2 are not pressed against the corresponding power switch transistors 202.

[0067] In the process of inserting the fixing device 152 downward, the boss 4 comes into contact with the guide surface 2013 of the shielding wall 133 of the shielding assembly 130. When the downward pressure is continued, the entire fixing device 152 moves toward the power switch transistor 202 under the engagement between the boss and the side wall of the housing. In this case, the elastic pieces 2 each receive an acting force toward the fixing plate 1, so that the elastic pieces 2 change from the state shown by the broken line in FIG. 15 to the state shown by the solid line. In this case, the elastic deformation of the elastic pieces 2 generates an appropriate axial pressure, so that the power switch transistors 202 can be tightly attached to the heat dissipation wall of the shielding assembly 130.

[0068] Finally, as shown in FIG. 15, a threaded fastener, such as a screw, may pass through the fastening lug 3 to secure the fastening device 152 to the shielding assembly 130.

[0069] 6, a heat insulating layer 151 is interposed between the power switch transistor 202 and the flow path member 132. As a result, the heat insulating layer 151 transfers heat generated during operation of the power switch transistor 202 to the flow path member 132, thereby lowering the temperature of the power switch transistor 202 and improving the operation efficiency of the power switch transistor 202. Furthermore, the heat insulating layer 151 can prevent the in-vehicle power supply device 100 from being affected by leakage current from the power switch transistor 202, thereby improving the safety and reliability of use of the in-vehicle power supply device 100.

[0070] In some embodiments, the coolant passage 131 is annular and surrounds the outer periphery of the magnetic device 120. In this manner, the annular coolant passage 131 allows the coolant to flow through the passage, so that the coolant can better absorb the heat of the vehicle-mounted power supply device 100, lower the temperature of the vehicle-mounted power supply device 100, and improve the operating efficiency of the vehicle-mounted power supply device 100. In addition, by providing the coolant passage 131 around the outer periphery of the electromagnetic device 120, the heat generated by the magnetic device 120 during operation can be more quickly absorbed by the coolant. This improves the heat dissipation effect of the coolant and reduces the temperature of the vehicle-mounted power supply device 100 during operation, thereby improving the operating efficiency of the vehicle-mounted power supply device 100.

[0071] In some embodiments, as shown in FIG. 3, the mounting position 111 has a mounting groove 112, the magnetic device 120 is provided in the mounting groove 112, the magnetic device 120 is connected to the inner wall of the mounting groove 112 by a screw, and a thermally conductive adhesive is provided between the magnetic device 120 and the inner wall of the mounting groove 112. Thus, by providing the mounting groove 112 for assembling the magnetic device 120, the assembly efficiency of the magnetic device 120 is further improved. In addition, by connecting the magnetic device 120 by a screw connection method, the assembly of the magnetic device 120 is convenient, and the disassembly and maintenance of the electrical components are facilitated, thereby improving the assembly efficiency of the vehicle-mounted power supply device 100. In addition, by further providing a thermally conductive adhesive between the magnetic device 120 and the mounting groove 112, the heat generated by the magnetic device 120 during operation can be more quickly transferred to the inner wall of the mounting groove 112, so that the heat of the magnetic device 120 can be more quickly released, thereby improving the operating efficiency of the vehicle-mounted power supply device 100.

[0072] Hereinafter, with reference to FIGS. 6 to 10, a magnetic device 120 according to an embodiment of the present disclosure will be described.

[0073] As shown in FIGS. 6 to 10, a magnetic device 120 according to an embodiment of the present disclosure includes a magnetic core, a coil 300, a bobbin 400, a cable lug 500, and a nut 600.

[0074] A coil 300 is wound around the magnetic core and has a pin 310, a bobbin 400 is provided on the magnetic core, a cable lug 500 is attached to the bobbin 400 and connected to the pin 310 and has a connection hole 510, and a nut 600 is attached to the bobbin 400 and has a screw hole 610 corresponding to the position of the connection hole 510.

[0075] Specifically, a circuit board connected to the magnetic device 120 may be provided on the opposite side of the cable lug 500 from the bobbin 400, and the circuit board may be provided with a screw fastener (e.g., a bolt or a screw), which may pass through the connection hole 510 and be screwed into the screw hole 610, thereby realizing an electrical connection and a mechanical connection between the circuit board and the magnetic device 120.

[0076] In the magnetic device 120 according to the embodiment of the present disclosure, the coil 300 is wound around the magnetic core and has a pin 310, the bobbin 400 is provided on the magnetic core, and the cable lug 500 is attached to the bobbin 400 and connected to the pin 310. In this manner, an electrical connection between the cable lug 500 and the coil 300 can be realized, and the circuit board is electrically connected to the cable lug 500, which further realizes an electrical connection between the circuit board and the coil 300.

[0077] In addition, the cable lug 500 has a connection hole 510, the nut 600 is attached to the bobbin 400 and has a screw hole 610 corresponding to the position of the connection hole 510, and the circuit board is screwed into the screw hole 610 of the nut 600 by a screw fastener, the connection process is safe and reliable, the connection quality is easy to detect, the probability of damage to the magnetic device 120 is low, the connection between the circuit board and the magnetic device 120 is stable, no welding is required, it is easy to attach and detach, and the compatibility and maintainability of the device are high.

[0078] Thus, the magnetic device 120 according to the embodiment of the present disclosure has advantages such as high device compatibility and maintainability, reliable connection, and easy detection of connection quality.

[0079] 6 to 9, in some specific embodiments of the present disclosure, the cable lug 500 is movably attached to the bobbin 400 so that the distance between the connection hole 510 and the bobbin 400 is adjustable. Since the circuit board is located on the opposite side of the cable lug 500 from the bobbin 400, the distance between the connection hole 510 and the bobbin 400 can be adjusted by moving the cable lug 500, and the flatness of the connection between the magnetic device 120 and the circuit board can be further improved.

[0080] 7 to 10, in some specific embodiments of the present disclosure, cable lug 500 includes plate portion 520, bending portion 530, and clamp portion 540. Connection hole 510 is formed in plate portion 520, nut 600 is provided between plate portion 520 and bobbin 400, bending portion 530 has one end connected to plate portion 520, protrudes toward bobbin 400, and is movably attached to bobbin 400, and clamp portion 540 is connected to the other end of bending portion 530 and clamps pin 310.

[0081] It should be understood that when the circuit board is screwed into the nut 600 by a screw fastener, the plate portion 520 is located between the circuit board and the nut 600, thus realizing the positional fixation between the cable lug 500 and the circuit board and the positional fixation of the nut 600, and further realizing the positional fixation between the cable lug 500 and the bobbin 400 by the engagement between the bent portion 530 and the bobbin 400. This improves the stability of the relative position between the circuit board and the entire magnetic device 120. The clamp portion 540 clamps the pin 310 from both radially opposite sides of the pin 310, and can improve the connection stability between the cable lug 500 and the pin 310, and the clamp portion 540 and the pin 310 may be welded or crimped.

[0082] In some specific embodiments of the present disclosure, as shown in FIGS. 7 to 10, the bending portion 530 is configured in a U-shape protruding into the bobbin 400 to form a groove 531, and the clamping portion 540 is located in the groove 531. The opening direction of the clamping portion 540 is provided opposite to the opening direction of the groove 531, for example, the opening direction of the groove 531 is opposite to the magnetic core, and the opening direction of the clamping portion 540 is toward the magnetic core. The connection portion between the pin 310 and the clamping portion 540 is located inside the groove 531, thereby reducing the probability that the outside contacts the pin 310. By providing the groove 531, the connection portion between the pin 310 and the clamping portion 540 can be protected and the stability of the overall connection of the magnetic device 120 can be improved.

[0083] In some specific embodiments of the present disclosure, as shown in Figs. 7 to 9, an assembly groove 410 is provided on the bobbin 400, and the bending portion 530 is movably engaged with the assembly groove 410. The bending portion 530 may be press-fitted into the assembly groove 410, and the cable lug 500 may be fixed to the bobbin 400 by the friction force between the bending portion 530 and the assembly groove 410, and when the external force received by the cable lug 500 is greater than the friction force between the bending portion 530 and the assembly groove 410, the cable lug 500 may move relative to the bobbin 400. By providing the assembly groove 410, on the one hand, the bending portion 530 can be accommodated and the overall volume of the magnetic device 120 can be reduced, which helps to miniaturize the product, and on the other hand, the relative position between the bobbin 400 and the cable lug 500 can be fixed by the engagement between the bending portion 530 and the assembly groove 410, which improves the structural strength of the entire magnetic device 120.

[0084] In some specific embodiments of the present disclosure, as shown in Figs. 7 to 9, the bobbin 400 is provided with an anti-rotation groove 420, and the nut 600 is provided in the anti-rotation groove 420, and the distance between the plate portion 520 and the bottom wall of the anti-rotation groove 420 is greater than the axial length of the nut 600. It should be understood that the nut 600 is not circular, and the shape of the anti-rotation groove 420 matches the shape of the nut 600, for example, both are hexagonal, and the nut 600 is fixed in its circumferential direction relative to the anti-rotation groove 420, so that when the screw fastener (e.g., bolt and screw) of the circuit board penetrates the connection hole 510 and engages with the nut 600, the nut 600 is prevented from receiving a force in its circumferential direction and rotating, improving the convenience of assembly. By making the distance between the plate portion 520 and the bottom wall of the anti-rotation groove 420 greater than the axial length of the nut 600, the position of the nut 600 in its axial direction can be adjusted. The shortest distance between the plate portion 520 and the surface of the bobbin 400 facing the plate portion 520 may be less than the axial length of the nut 600 to prevent the nut 600 from falling out of the anti-rotation groove 420 .

[0085] 7 to 10, in some specific embodiments of the present disclosure, the cable lug 500 further includes a positioning protrusion 550, the positioning protrusion 550 and the bending portion 530 are respectively connected to two opposing edges of the plate portion 520, the bobbin 400 is provided with a positioning groove 440, the positioning protrusion 550 is engaged with the positioning groove 440, and the positioning protrusion 550 extends toward the bobbin 400 along the edge of the plate portion 520. The engagement between the positioning protrusion 550 and the positioning groove 440 makes the connection between the cable lug 500 and the bobbin 400 more stable, and further fixes the relative positions of the cable lug 500 and the bobbin 400.

[0086] In some specific embodiments of the present disclosure, as shown in Figs. 6 to 8, the magnetic device 120 further includes a magnetic circuit member 801 and at least one magnetic sheet 700, the magnetic core and the bobbin 400 are supported by the magnetic circuit member 801, and the magnetic sheet 700 is attached to the bobbin 400. The magnetic sheet 700 may include a magnetic material, and the magnetic sheet 700 may have high permeability to effectively shield leakage magnetic flux generated by the coil 300, and the magnetic sheet 700 may have high resistivity to reduce eddy current loss due to the addition of the magnetic sheet 700, further reducing heat generation of the entire magnetic device 120 and improving the efficiency of the entire magnetic device 120.

[0087] As shown in FIG. 8 , the magnetic device 120 further includes a support portion 800, which supports the coil 300 and is connected to a magnetic circuit member 801, the support portion 800 and the magnetic circuit member 801 forming an L-shaped structure, and the magnetic core is provided on the side of the magnetic circuit member 801 facing the coil 300 and is drilled within the coil 300.

[0088] In some specific embodiments of the present disclosure, as shown in FIGS. 6 to 8, the magnetic sheet 700 and the magnetic circuit member 801 are provided on both opposing sides of the magnetic core. Since both the magnetic sheet 700 and the magnetic circuit member 801 generate eddy current loss, the magnetic sheet 700 and the magnetic circuit member 801 are provided on both opposing sides of the transformer, respectively, to prevent heat concentration in the magnetic sheet 700 and the magnetic circuit member 801, improve the heat dissipation efficiency of the magnetic sheet 700 and the magnetic circuit member 801, and further improve the efficiency of the entire magnetic device 120. In addition, a hook 430 is provided on the bobbin 400, and the hook 430 is hooked on an edge of the magnetic sheet 700. The hook 430 may be multiple, and the multiple hooks 430 may be hooked on at least both opposing edges of the magnetic sheet 700 to improve the relative stability between the magnetic sheet 700 and the bobbin 400 and ensure the structural strength of the entire magnetic device 120.

[0089] In some embodiments, the shielding assembly 130 and the housing 110 are integrally molded members, which simplifies the manufacturing steps of the shielding assembly 130 and the housing 110, simplifies the manufacturing flow of the shielding assembly 130 and the housing 110, improves the connection strength between the shielding assembly 130 and the housing 110, and improves the structural strength of the entire on-board power supply device 100.

[0090] 1 and 2, in some embodiments, a bracket 113 is provided on the outer periphery of the housing 110, and the bracket 113 and the housing 110 are integrally molded members. As described above, the integral molding simplifies the manufacturing steps of the bracket 113 and the housing 110, simplifies the manufacturing flow of the bracket 113 and the housing 110, improves the connection strength between the bracket 113 and the housing 110, and improves the structural strength of the entire vehicle-mounted power supply device 100. In addition, the bracket 113 can provide support stability to the housing 110, so that the loaded vehicle-mounted power supply device 100 has higher safety and reliability in use.

[0091] 15, a vehicle 1000 according to an embodiment of the present disclosure includes the above-described in-vehicle power supply device 100. In this way, the vehicle 1000 equipped with the in-vehicle power supply device 100 has a high heat dissipation effect, and therefore the operating temperature of the in-vehicle power supply device 100 decreases during operation of the vehicle 1000, thereby improving the operating efficiency of the in-vehicle power supply device 100.

[0092] In the present description, reference to a term such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "particular examples," or "some examples" means that the specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In the present description, exemplary expressions of the above terms are not necessarily limited to the same embodiment or example.

[0093] Although embodiments of the present disclosure have been illustrated and described, as can be understood by those skilled in the art, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present disclosure, and the scope of the present disclosure is limited by the claims and their equivalents. [Explanation of symbols]

[0094] 100 Automotive power supply unit 110 Housing 111 Mounting position 112 Mounting groove 113 Bracket 120 Magnetic Devices 130 Shielding Assembly 131 Coolant passage 132 Flow path components 1321 First Part 1322 Second Part 1323 First side wall 1324 Second Side Wall 133 Shielding Wall 134 Channel cover plate 135 Sealing Ring 151 Insulation Layer 152 Fixation device 300 coils 310 Pin 400 Bobbin 410 Assembly groove 420 Anti-rotation groove 430 Hook 440 Positioning groove 500 Cable Lug 510 Connection hole 520 Board part 530 Bending section 531 Groove 540 Clamp section 550 Positioning protrusion 600 Nut 610 Screw hole 700 Magnetic Sheet 800 Support part 801 Magnetic circuit components 1 Fixed plate 2 Elastic piece 21 Fixed part 22 Connection 23 Crimping part 231 First crimping part 232 Second crimping part 3 Fixed lugs 4. Boss 5 Rug 51 Rug Board 121 Slope 2013 Guide Surface 202 Power Switch Transistor 1000 vehicles

Claims

1. a housing having a mounting location; a magnetic device disposed at the mounting location; and a shielding assembly provided within the housing and surrounding an outer periphery of the mounting position.

2. The vehicle onboard power supply system of claim 1 , wherein the shielding assembly defines a coolant passageway surrounding an outer periphery of the magnetic device.

3. The shielding assembly includes: a flow path member surrounding the cooling liquid passage; 3. The on-board power supply device according to claim 2, further comprising: a shielding wall spaced apart from the flow path member and positioned on a side of the flow path member away from the magnetic device.

4. The cooling liquid passage has an opening at one side thereof, The shielding assembly includes: a flow path cover plate sealingly connected to the flow path member to seal the opening; 4. The on-board power supply device according to claim 3, further comprising a sealing ring interposed between the flow path cover plate and the flow path member.

5. 5. The vehicle-mounted power supply device according to claim 4, wherein the flow path member includes a first side wall and a second side wall spaced apart from the first side wall, the coolant passage is defined between the first side wall and the second side wall, the first side wall faces the magnetic device and the second side wall is located on a side of the first side wall away from the magnetic device, and a distance between the first side wall and the second side wall gradually decreases in a direction toward the opening.

6. A circuit board; a plurality of power switch transistors each electrically connected to the circuit board; 6. The on-board power supply device according to claim 3, further comprising: a fixing device that simultaneously fixes the plurality of power switch transistors between the flow path member and the shielding wall.

7. The fixing device comprises: A fixing plate and and a plurality of elastic pieces, each of which fixes one power switch transistor, one end of each elastic piece being fixed to the fixed plate and the other end of each elastic piece being located on one side in a thickness direction of the fixed plate and spaced apart from a surface of the one side in the thickness direction of the fixed plate.

8. The elastic pieces each include: A fixed portion fixed to the fixed plate; The connection part and 8. The in-vehicle power supply device according to claim 7, further comprising: a crimping portion, the connection portion being connected between the fixed portion and the crimping portion, the crimping portion including a first crimping portion and a second crimping portion, one end of the first crimping portion being connected to the connection portion, the other end of the first crimping portion extending in a direction away from the fixed plate, and one end of the second crimping portion being connected to the other end of the first crimping portion, the other end of the second crimping portion extending in a direction toward the fixed plate.

9. 8. The vehicle-mounted power supply device according to claim 7, characterized in that at least one boss is provided on the other side in the thickness direction of the fixed plate, the cross-sectional area of ​​the boss gradually decreases along a direction away from the fixed plate, and the boss is formed such that a portion of the surface on one side in the thickness direction of the fixed plate protrudes onto the surface on the other side in the thickness direction of the fixed plate.

10. an edge of the stationary plate provided with at least one lug extending away from a center of the stationary plate; The fixing device comprises: At least one lug plate is provided on one side of the lug in a thickness direction, 8. The vehicle-mounted power supply device according to claim 7, characterized in that at least one fixing lug is provided on an edge of the fixing plate, and a free end of the fixing lug extends toward the other side of the fixing plate along the thickness direction of the fixing plate.

11. The magnetic device comprises: A magnetic core, a coil wound around the magnetic core and having a pin; A bobbin provided on the magnetic core; a cable lug attached to the bobbin and connected to the pin, the cable lug having a connection hole; 11. The vehicle-mounted power supply device according to claim 1, further comprising: a nut attached to the bobbin, the nut having a screw hole corresponding to the position of the connection hole.

12. the cable lug is movably attached to the bobbin such that a distance between the connection hole and the bobbin is adjustable; The cable lug is a plate portion in which the connection hole is formed and the nut is provided between the plate portion and the bobbin; a bent portion having one end connected to the plate portion, protruding toward the bobbin, and movably attached to the bobbin, the bent portion being configured in a U-shape protruding into the bobbin and forming a groove; 12. The vehicle-mounted power supply device according to claim 11, further comprising: a clamp portion connected to the other end of the bent portion, clamping the pin, and positioned within the groove.

13. 13. The in-vehicle power supply device according to claim 12, characterized in that an anti-rotation groove is provided in the bobbin, the nut is provided in the anti-rotation groove, and the distance between the plate portion and a bottom wall of the anti-rotation groove is greater than the axial length of the nut.

14. The cable lug is 14. The in-vehicle power supply device according to claim 12 or 13, further comprising a positioning protrusion, the positioning protrusion and the bent portion being respectively connected to two opposing edges of the plate portion, a positioning groove being provided in the bobbin, and the positioning protrusion engaging with the positioning groove.

15. a magnetic circuit member on which the magnetic core and the bobbin are supported; The vehicle-mounted power supply device according to any one of claims 11 to 14, further comprising at least one magnetic sheet, the magnetic sheet being attached to the bobbin, the magnetic sheet and the magnetic circuit member being respectively provided on opposing sides of the magnetic core, a hook being provided on the bobbin, and the hook being hooked onto an edge of the magnetic sheet.

16. A vehicle comprising an on-board power supply device according to any one of claims 1 to 15.

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