Energy storage inductor

Abstract

The utility model discloses an energy storage inductor. The energy storage inductor comprises a first magnetic core branch part, a second magnetic core branch part, a first middle column and a second middle column, the first magnetic core part comprises a first bottom plate; the second magnetic core part comprises a second bottom plate; a first groove is formed in the first bottom plate, and the first groove partially penetrates through the first bottom plate; a second groove is formed in the second bottom plate, and the second groove partially penetrates through the second bottom plate; the first middle column is arranged in the first groove, and the second middle column is arranged in the second groove. According to the technical scheme, the first groove is formed in the first bottom plate, the second groove is formed in the second bottom plate, the first middle column is arranged in the first groove, the second middle column is arranged in the second groove, the first groove and the second groove play a role in limiting, the positions of the first middle column and the second middle column can be fixed conveniently, and the clamping effect is good. The stability of the energy storage inductor and the stability of the inductance value are improved.

Description

Technical Field

[0001] This utility model relates to the field of inductor technology, and in particular to an energy storage inductor. Background Technology

[0002] Compared to capacitor energy storage, inductor energy storage offers higher energy density, smaller system size, lighter weight, and lower cost. Therefore, inductor energy storage has the potential to achieve higher energy utilization and pulse power. The principle of inductor energy storage is mainly based on electromagnetic induction. By resisting changes in current, the inductor acts as an energy storage filter.

[0003] In existing technologies, two separate inductors are often used for coupling, and the energy storage inductor is formed by assembling a magnetic core, a center column, and a coil. Due to uncertainties in the assembly process, errors can easily occur between the two sets of inductors, especially the relative positions of the magnetic core, center column, and coil, which in turn affects the stability of the normal operation of the energy storage inductor. Utility Model Content

[0004] This invention provides an energy storage inductor to solve the problem in the prior art where assembly errors lead to positional errors in the magnetic core and the central column, resulting in unstable inductance values.

[0005] This utility model provides an energy storage inductor, including: a first magnetic core portion, a second magnetic core portion, a first intermediate column, and a second intermediate column;

[0006] The first magnetic core portion includes a first base plate; the second magnetic core portion includes a second base plate; the first base plate includes a first groove, the first groove portion penetrating the first base plate; the second base plate includes a second groove, the second groove portion penetrating the second base plate;

[0007] The first central post is disposed in the first groove, and the second central post is disposed in the second groove.

[0008] Optionally, the first groove has the same contact surface shape as the first central post; the second groove has the same contact surface shape as the second central post.

[0009] Optionally, the contact surfaces of the first groove and the first central column are both elliptical in shape; the contact surfaces of the second groove and the second central column are both elliptical in shape.

[0010] Optionally, the first magnetic core portion further includes a first sidewall and a second sidewall disposed opposite to each other; a first base plate connects the first sidewall and the second sidewall; the second magnetic core portion further includes a third sidewall and a fourth sidewall disposed opposite to each other; a second base plate connects the third sidewall and the fourth sidewall;

[0011] The energy storage inductor also includes a connecting plate; the connecting plate is disposed between the first side wall and the third side wall and connects the first side wall and the third side wall; the connecting plate is also disposed between the second side wall and the fourth side wall and connects the second side wall and the fourth side wall;

[0012] The first and second central pillars are respectively located on both sides of the connecting plate.

[0013] Optionally, the energy storage inductor may also include a first coil and a second coil;

[0014] The first coil is wound on the first central column; the second coil is wound on the second central column.

[0015] Optionally, the first coil and the second coil have the same number of turns and are wound in the same direction.

[0016] Optionally, the first coil includes a first current input terminal and a first current output terminal;

[0017] The second coil includes a second current input terminal and a second current output terminal;

[0018] The energy storage inductor also includes a backplate, which is connected to the first base plate and the second base plate; the backplate includes a first lead-out hole, a second lead-out hole, a third lead-out hole and a fourth lead-out hole;

[0019] The first current input terminal is electrically connected to the first signal input terminal through the first lead-out hole; the first current output terminal is electrically connected to the first signal output terminal through the second lead-out hole; the second current input terminal is electrically connected to the second signal input terminal through the third lead-out hole; and the second current output terminal is electrically connected to the second signal output terminal through the fourth lead-out hole.

[0020] Optionally, the first coil includes a first current input terminal and a first current output terminal; the second coil includes a second current input terminal and a second current output terminal.

[0021] The energy storage inductor also includes a backplate, which connects to the first base plate and the second base plate; the base plate includes a fifth lead-out hole and a sixth lead-out hole;

[0022] The first current output terminal is electrically connected to the second current input terminal; the first current input terminal is electrically connected to the third signal output terminal through the fifth lead-out hole; the second current output terminal is electrically connected to the third signal input terminal through the sixth lead-out hole.

[0023] Optionally, the first base plate includes a first upper surface, a first lower surface, a first sub-side surface, and a second sub-side surface;

[0024] The first lower surface is located on the side of the first lower surface away from the first central column, and the area of ​​the first upper surface is smaller than the area of ​​the first lower surface; the first sub-side surface connects the first upper surface and the second sub-side surface; the second sub-side surface connects the first lower surface; the included angle α between the first sub-side surface and the second sub-side surface satisfies 90° < α < 180°;

[0025] The second base plate includes a second upper surface, a second lower surface, a third sub-side surface, and a fourth sub-side surface;

[0026] The second lower surface is located on the side of the second lower surface away from the second central column, and the area of ​​the second upper surface is smaller than the area of ​​the second lower surface; the third sub-side connects the second upper surface and the fourth sub-side; the fourth sub-side connects the second lower surface; the included angle α between the third sub-side and the fourth sub-side satisfies 90° < α < 180°.

[0027] Optionally, the energy storage inductor may also include an insulating film;

[0028] An insulating film is applied to the surfaces of the first and second intermediate columns.

[0029] The technical solution of this utility model involves setting a first groove in a first base plate and a second groove in a second base plate, placing a first central column in the groove and a second central column in the second groove. The first and second grooves serve as limiting positions, facilitating the fixing of the positions of the first and second central columns and improving the stability of the energy storage inductor and the stability of its inductance.

[0030] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a three-dimensional structural schematic diagram of an energy storage inductor provided according to an embodiment of the present utility model;

[0033] Figure 2 This is a three-dimensional structural schematic diagram of a first magnetic core portion according to an embodiment of the present utility model;

[0034] Figure 3 This is a three-dimensional structural schematic diagram of a second magnetic core portion according to an embodiment of the present utility model;

[0035] Figure 4 This is a schematic diagram of the first type of backplate structure provided according to an embodiment of the present utility model;

[0036] Figure 5This is a schematic diagram of the second backplate structure provided according to an embodiment of the present utility model;

[0037] Figure 6 This is a schematic diagram of a first angle of a first magnetic core portion according to an embodiment of the present invention;

[0038] Figure 7 This is a second angle schematic diagram of a first magnetic core portion provided according to an embodiment of the present utility model. Detailed Implementation

[0039] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0040] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this utility model described herein can be implemented in sequences other than those illustrated or described herein.

[0041] Figure 1 This is a three-dimensional structural diagram of an energy storage inductor provided according to an embodiment of the present invention.

[0042] Figure 2 This is a three-dimensional structural diagram of a first magnetic core portion according to an embodiment of the present invention.

[0043] Figure 3 This is a three-dimensional structural diagram of a second magnetic core portion according to an embodiment of the present invention, combined with... Figure 1 , Figure 2 and Figure 3 As shown, the energy storage inductor includes:

[0044] First magnetic core section 1, second magnetic core section 2, first central column 3, and second central column 4;

[0045] The first magnetic core portion 1 includes a first base plate 11; the second magnetic core portion 2 includes a second base plate 21; the first base plate 11 includes a first groove 10, and the first groove 10 partially penetrates the first base plate 11; the second base plate 21 includes a second groove 20, and the second groove 20 partially penetrates the second base plate 21.

[0046] The first central column 3 is disposed in the first groove 10, and the second central column 4 is disposed in the second groove 20.

[0047] The energy storage inductor is based on the principle of storing energy in an inductor. When current flows through the energy storage inductor, a magnetic field is generated within it, storing electrical energy. The amount of electrical energy stored in the energy storage inductor is proportional to its inductance and the square of the current flowing through it. The energy storage inductor includes a first magnetic core section 1, a second magnetic core section 2, a first central column 3, and a second central column 4. The first central column 3 is located in the first magnetic core section 1, and the second central column 4 is located in the second magnetic core section 2.

[0048] The first magnetic core section 1 includes a first base plate 11, which is connected to the first central column 3; the second magnetic core section 2 includes a second base plate 21, which is connected to the second central column 4. In the prior art assembly of energy storage inductors, since the first base plate 11 and the second base plate 21 are planar structures, the bonding of the first central column 3 and the second central column 4 requires determination based on the marked positions on the first base plate 11 and the second base plate 21. Since errors are unavoidable in both human and mechanical operations, the positions of the first central column 3 and the second central column 4 may deviate from the target positions, leading to abnormal inductance stability of the energy storage inductor. Therefore, in this embodiment, a first groove 10 is provided on the first base plate 11, and a second groove 20 is provided on the second base plate 21. The position of the first groove 10 is fixed, and the first central column 3 is placed in the first groove 10, which serves to limit its position. The position of the second groove 20 is fixed, and the second central column 4 is placed in the second groove 20, which also serves to limit its position. This configuration ensures that the positions of the first central column 3 and the second central column 4 are fixed, thus improving the operational stability of the energy storage inductor.

[0049] Specifically, the first magnetic core section 1 and the second magnetic core section 2 are designed to have the same structure, and the first central column 3 and the second central column 4 are designed to have the same structure. The first base plate 11 has a first groove 10 with the same shape and size as the bottom surface of the first central column 3, and the second base plate 21 has a second groove 20 with the same shape and size as the bottom surface of the second central column 4. The first central column 3 is placed in the first groove 10, and the second central column 4 is placed in the second groove 20, such that the first central column 3 is located in the first magnetic core section 1, and the second central column 4 is located in the second magnetic core section 2. The first magnetic core section 1 and the second magnetic core section 2 are stacked, and the first central column 3 and the second central column 4 are also stacked, with the first base plate 11 located on the side of the first central column 3 furthest from the second central column 4. During operation, the first central column 3 and the second central column 4 generate magnetic fields. Simultaneously, the magnetic field generated by the first central column 3 can interact with the first magnetic core section 1, and the magnetic field generated by the second central column 4 can interact with the second magnetic core section 2, allowing the energy storage inductor to perform energy storage and filtering processes.

[0050] In some embodiments, the energy storage inductor further includes a first coil 5 and a second coil 6; the first coil 5 is wound on a first central column 3; and the second coil 6 is wound on a second central column 4. During the operation of the energy storage inductor, a current in the same direction is passed through the first coil 5 and the second coil 6, causing the first coil 5 and the second coil 6 to couple and generate a magnetic field, thereby making the central column magnetic for energy storage. In this embodiment of the invention, coupling two separate magnetic cores, a central column, and coils can serve as a common-mode inductor and a common-mode filter. In some embodiments, the first coil 5 and the second coil 6 have the same number of turns and the same winding direction. Specifically, the winding direction of the first coil 5 on the first central column 3 is the same as the winding direction of the second coil 6 on the second central column 4, and they have the same number of turns, so that when a current in the same direction is passed through the first coil 5 and the second coil 6, they can serve as a common-mode inductor and a common-mode filter. In some embodiments, this energy storage inductor can be applied to a high-power power supply conversion power supply main control board and a battery management system energy storage power supply board.

[0051] In some embodiments, the first base plate 11 and the second base plate 21 can be thickened to increase the saturation current of the energy storage inductor; in addition, the first central column 3 and the second central column 4 can be made of iron-silicon material, which can also increase the saturation current of the energy storage inductor.

[0052] In some embodiments, the model number of the energy storage inductor may be ER35-003D-005D, where the letters in ER35 represent the core specification and the numbers represent the size, the numbers in 003D represent the product specification and the letters represent the product type, and 005D represents the serial number.

[0053] The technical solution of this utility model embodiment involves setting a first groove in a first base plate and a second groove in a second base plate, placing a first central column in the groove and a second central column in the second groove. The first and second grooves serve as limiting positions, facilitating the fixing of the positions of the first and second central columns, thereby improving the stability of the energy storage inductor and the stability of its inductance.

[0054] Optional, continue to refer to Figure 1 , Figure 2 and Figure 3 As shown, the first groove 10 has the same contact surface shape as the first central column 3; the second groove 20 has the same contact surface shape as the second central column 4.

[0055] Specifically, the first groove 10 is configured to have the same contact surface shape as the first central column 3, so that the first groove 10 exactly matches the first central column 3; the second groove 20 is configured to have the same contact surface shape as the second central column 4, so that the second groove 20 exactly matches the second central column 4. This configuration directly fixes the positions of the first central column 3 and the second central column 4, further ensuring the working stability of the energy storage inductor.

[0056] In addition, with the dimensions of the first magnetic core section 1 and the second magnetic core section 2 remaining unchanged, setting the first groove 10 and the second groove 20 can increase the dimensions of the first central column 3 and the second central column 4 along the y direction, thereby further improving the saturation state of the energy storage inductor magnetic circuit.

[0057] Optional, continue to refer to Figure 1 , Figure 2 and Figure 3 As shown, the contact surfaces of the first groove 10 and the first central column 3 are both elliptical in shape; the contact surfaces of the second groove 20 and the second central column 4 are both elliptical in shape.

[0058] The contact surfaces of the first groove 10 and the first central column 3 are both elliptical, and the contact surfaces of the second groove 20 and the second central column 4 are both elliptical. When the corresponding first coil 5 and second coil 6 are wound on the first central column 3 and the second central column 4, since the bottom surface of the central column is elliptical, the winding shape of the coil is also elliptical.

[0059] For example, the first magnetic core portion 1 also includes a first sidewall 12 and a second sidewall 13 disposed opposite to each other; the first base plate 11 connects the first sidewall 12 and the second sidewall 13. When the first coil 5 is wound on the first central post 3, the winding shape of the first coil 5 is also elliptical. When the size of the first coil 5 is too large, since the first magnetic core portion 1 has a side without sidewalls, the first coil 3 corresponding to the side without sidewalls will not exceed the range of the first magnetic core portion 1 of the energy storage inductor. The second coil 6 is similar.

[0060] In addition, when the contact surfaces of the first central column 3 and the second central column 4 are both elliptical, the winding height of the first coil 5 and the second coil 6 can be reduced under the premise that the lengths of the first coil 5 and the second coil 6 are fixed, thereby reducing the overall height of the energy storage inductor.

[0061] The technical solution of this utility model embodiment, by setting the contact surface shape of the first groove and the first central column to be elliptical, and setting the contact surface shape of the second groove and the second central column to be elliptical, can prevent the coil from exceeding the size range of the first magnetic core section and the second magnetic core section, and can also reduce the height of the coil winding, which is beneficial to the assembly of the energy storage inductor.

[0062] Optional, continue to refer to Figure 1 , Figure 2 and Figure 3 As shown, the first magnetic core section 1 also includes a first sidewall 12 and a second sidewall 13 disposed opposite to each other; the first base plate 11 connects the first sidewall 12 and the second sidewall 13; the second magnetic core section 2 also includes a third sidewall 22 and a fourth sidewall 23 disposed opposite to each other; the second base plate 21 connects the third sidewall 22 and the fourth sidewall 23.

[0063] The energy storage inductor also includes a connecting plate 7; the connecting plate 7 is disposed between the first side wall 12 and the third side wall 22 and connects the first side wall 12 and the third side wall 22; the connecting plate 7 is also disposed between the second side wall 13 and the fourth side wall 23 and connects the second side wall 13 and the fourth side wall 23.

[0064] The first central column 3 and the second central column 4 are respectively located on both sides of the connecting plate 7.

[0065] The first sidewall 12 and the second sidewall 13 further define the range of the first central column 3, and the third sidewall 22 and the fourth sidewall 23 further define the range of the second central column 4. The first sidewall 12 can be connected to the third sidewall 22 through a connecting plate 7, and the second sidewall 13 can be connected to the fourth sidewall 23 through a connecting plate 7, thereby connecting the first magnetic core section 1 and the second magnetic core section 2. The connecting plate 7 separates the first magnetic core section 1 and the second magnetic core section 2. The first central column 3 is disposed in the magnetic cavity defined by the first magnetic core section 1 and the connecting plate 7, and the second central column 4 is disposed in the magnetic cavity defined by the second magnetic core section 2 and the connecting plate 7, so that the first magnetic core section 1 and the second magnetic core section 2 can function independently or in combination, thereby ensuring the functionality of the energy storage inductor.

[0066] The technical solution of this utility model embodiment is to provide a first sidewall and a second sidewall in the first magnetic core section, and a third sidewall and a fourth sidewall in the second magnetic core section, and connect the first magnetic core section and the second magnetic core section through a connecting plate to realize the combination of energy storage inductors and improve the saturation current of the energy storage inductors.

[0067] Optional, Figure 4 This is a schematic diagram of the first type of backplate structure provided in the embodiment of this utility model, combined with... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the first coil 5 includes a first current input terminal and a first current output terminal;

[0068] The second coil 6 includes a second current input terminal and a second current output terminal;

[0069] The energy storage inductor also includes a backplate 8, which is connected to the first base plate 11 and the second base plate 21; the backplate 8 includes a first lead-out hole 81, a second lead-out hole 82, a third lead-out hole 83 and a fourth lead-out hole 84;

[0070] The first current input terminal is electrically connected to the first signal input terminal through the first lead-out hole 81; the first current output terminal is electrically connected to the first signal output terminal through the second lead-out hole 82; the second current input terminal is electrically connected to the second signal input terminal through the third lead-out hole 83; and the second current output terminal is electrically connected to the second signal output terminal through the fourth lead-out hole 84.

[0071] When the first coil 5 is wound around the first central post 3, its two ends can be a first current input terminal and a first current output terminal, respectively. An external circuit board can be connected, and leads can be connected in series with the first current input terminal and the first current output terminal to energize the first coil 5 and generate a magnetic field. When the second coil 6 is wound around the second central post 4, its two ends can be a second current input terminal and a second current output terminal, respectively. An external circuit board can be connected, and leads can be connected in series with the second current input terminal and the second current output terminal to energize the second coil 6 and generate a magnetic field.

[0072] The backplate 8 can be disposed on one side of the first magnetic core section 1 and the second magnetic core section 2. The backplate 8 includes a through first lead-out hole 81, a second lead-out hole 82, a third lead-out hole 83 and a fourth lead-out hole 84. The first current input terminal, the first current output terminal, the second current input terminal and the second current output terminal can be led out from the first lead-out hole 81, the second lead-out hole 82, the third lead-out hole 83 and the fourth lead-out hole 84. The circuit board can be connected to the lead wires of the first lead-out hole 81, the second lead-out hole 82, the third lead-out hole 83 and the fourth lead-out hole 84, thereby ensuring the normal operation of the energy storage inductor.

[0073] Specifically, the first current input terminal is electrically connected to the first signal input terminal of the circuit board through the first lead-out hole 81; the first current output terminal is electrically connected to the first signal output terminal of the circuit board through the second lead-out hole 82; the second current input terminal is electrically connected to the second signal input terminal of the circuit board through the third lead-out hole 83; and the second current output terminal is electrically connected to the second signal output terminal of the circuit board through the fourth lead-out hole 84. When the circuit board simultaneously inputs current to the first current input terminal and the second current input terminal, the first coil 5 and the second coil 6 of the energy storage inductor jointly generate a magnetic field, thereby realizing the function of common mode energy storage.

[0074] The technical solution of this utility model embodiment is to set a back plate in the energy storage inductor, and lead out the first current input terminal and the first current output terminal in the first coil, and the second current input terminal and the second current output terminal in the second coil through the lead-out holes of the back plate, thereby facilitating the connection between the energy storage inductor and the circuit board and realizing the functions of common mode energy storage and common mode filtering.

[0075] Optional, Figure 5 This is a schematic diagram of the second backplate structure provided in the embodiment of this utility model, combined with... Figure 1 , Figure 2 , Figure 3 and Figure 5 As shown, the first coil 5 includes a first current input terminal and a first current output terminal; the second coil 6 includes a second current input terminal and a second current output terminal.

[0076] The energy storage inductor also includes a backplate 8, which is connected to the first base plate 11 and the second base plate 21; the backplate 8 includes a fifth lead-out hole 85 and a sixth lead-out hole 86;

[0077] The first current output terminal is electrically connected to the second current input terminal; the first current input terminal is electrically connected to the third signal output terminal through the fifth lead-out hole 85; the second current output terminal is electrically connected to the third signal input terminal through the sixth lead-out hole 86.

[0078] The back plate 8 can be disposed on one side of the first magnetic core section 1 and the second magnetic core section 2. The back plate 8 includes a through fifth lead-out hole 85 and a sixth lead-out hole 86, which connect the first current output terminal and the second current input terminal, so that the first coil 5 and the second coil 6 are connected in series. The first current input terminal is electrically connected to the third signal output terminal of the circuit board through the fifth lead-out hole 85, and the second current output terminal is electrically connected to the third signal input terminal through the sixth lead-out hole 86, so that the first coil 5 and the second coil 6 are equivalent to a single coil, realizing the common operation inside the energy storage inductor.

[0079] In some embodiments, a reverse current can be supplied to the first coil 5 and the second coil 6 to eliminate common-mode noise, thereby ensuring the quality of the transmitted electrical signal.

[0080] The technical solution of this utility model embodiment is to set a back plate in the energy storage inductor, connect the first current output terminal in the first coil and the second current input terminal in the second coil, and lead out the first current input terminal and the second current output terminal through the lead-out holes of the back plate, thereby facilitating the connection between the energy storage inductor and the circuit board, realizing the coordinated work of the first coil and the second coil, and realizing the functions of common mode energy storage and common mode filtering.

[0081] Optional, Figure 6 This is a schematic diagram of a first angle of a first magnetic core portion according to an embodiment of the present invention. Figure 7 This is a second angle schematic diagram of a first magnetic core portion according to an embodiment of the present invention, as shown below. Figure 1 , Figure 6 and Figure 7 As shown, the first base plate 11 includes a first upper surface 111, a first lower surface 112, a first sub-side surface 113, and a second sub-side surface 114;

[0082] The first lower surface 112 is located on the side of the first lower surface 112 away from the first central column 3, and the area of ​​the first upper surface 111 is smaller than the area of ​​the first lower surface 112; the first sub-side surface 113 connects the first upper surface 111 and the second sub-side surface 114; the second sub-side surface 114 connects the first lower surface 112; the included angle α between the first sub-side surface 113 and the second sub-side surface 114 satisfies 90° < α < 180°;

[0083] The second base plate 21 includes a second upper surface 211, a second lower surface 212, a third sub-side surface 213, and a fourth sub-side surface 214;

[0084] The second lower surface 212 is located on the side of the second lower surface 212 away from the second central column 4, and the area of ​​the second upper surface 211 is smaller than the area of ​​the second lower surface 212; the third sub-side surface 213 connects the second upper surface 211 and the fourth sub-side surface 214; the fourth sub-side surface 214 connects the second lower surface 212; the included angle α between the third sub-side surface 213 and the fourth sub-side surface 214 satisfies 90° < α < 180°.

[0085] The first base plate 11 includes a first upper surface 111, a first lower surface 112, a first sub-side surface 113, and a second sub-side surface 114. The projection of the first base plate 11 onto the plane along the x-direction is trapezoidal. The first lower surface 112 is located on the side of the first lower surface 112 away from the first central column 3, and the area of ​​the first upper surface 111 is smaller than the area of ​​the first lower surface 112. The first sub-side surface 113 connects the first upper surface 111 and the second sub-side surface 114. The second sub-side surface 114 connects the first lower surface 112. The included angle α between the first sub-side surface 113 and the second sub-side surface 114 satisfies 90° < α < 180°, that is, there is a chamfered structure on the first base plate 11.

[0086] The second base plate 21 includes a second upper surface 211, a second lower surface 212, a third sub-side surface 213, and a fourth sub-side surface 214. Along the x-direction, the projection of the second base plate 21 onto the plane is trapezoidal. The second lower surface 212 is located on the side of the second lower surface 212 away from the second central column 4, and the area of ​​the second upper surface 211 is smaller than the area of ​​the second lower surface 212. The third sub-side surface 213 connects the second upper surface 211 and the fourth sub-side surface 214; the fourth sub-side surface 214 connects the second lower surface 212; the included angle α between the third sub-side surface 213 and the fourth sub-side surface 214 satisfies 90° < α < 180°, meaning that the second base plate 21 has a chamfered structure. This configuration prevents the first central post 3 or the first coil 5 from rubbing against each other when they are placed and assembled in the first magnetic core section 1 along the x-direction, thus facilitating assembly; and prevents the second central post 4 or the second coil 6 from rubbing against each other when they are placed and assembled in the second magnetic core section 2 along the x-direction, thus facilitating assembly.

[0087] The technical solution of this utility model embodiment, by setting a chamfer structure on the first base plate and the second base plate, can prevent the center column or coil from being scratched by the inner wall of the magnetic core when assembling with the magnetic core, thereby improving the ease of assembling the energy storage inductor.

[0088] Optionally, the energy storage inductor may also include an insulating film;

[0089] An insulating film covers the surfaces of the first and second intermediate pillars. (Not shown in the figure)

[0090] In order to improve the isolation withstand voltage level of the energy storage inductor, an insulating film can be wrapped around the surface of the first and second intermediate columns. This can prevent the impact of high lightning surges during the operation of the energy storage inductor and effectively protect the components of the entire board.

[0091] In some embodiments, an insulating film may also be covered on the first base plate and the second base plate of the energy storage inductor. The insulating film is disposed on the surface of the first base plate except for the first groove, and the second base plate is disposed on the surface except for the second groove, thereby improving the isolation withstand voltage level of the energy storage inductor.

[0092] The energy storage inductor of this embodiment is easy to assemble, readily automates production, improves production efficiency, reduces costs, ensures product consistency, and guarantees higher quality. Furthermore, it can be applied to various circuit transmissions, and will not experience inductor saturation under high current or special environmental conditions, ensuring normal operation of the equipment and reducing the overall failure rate.

[0093] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. An energy storage inductor, comprising: The energy storage inductor comprises: a first magnetic core part, a second magnetic core part, a first middle column and a second middle column; the first magnetic core part comprises a first bottom plate; the second magnetic core part comprises a second bottom plate; the first bottom plate comprises a first groove, and the first groove partially penetrates the first bottom plate; the second bottom plate comprises a second groove, and the second groove partially penetrates the second bottom plate; the first middle column is arranged in the first groove, and the second middle column is arranged in the second groove.

2. The energy storage inductor of claim 1, wherein, the first groove has the same shape as the contact surface of the first middle column; and the second groove has the same shape as the contact surface of the second middle column.

3. The energy storage inductor of claim 1, wherein, the contact surface of the first middle column and the contact surface of the second middle column are both elliptical.

4. The energy storage inductor of claim 1, wherein, the first magnetic core part further comprises a first side wall and a second side wall arranged oppositely; the first bottom plate connects the first side wall and the second side wall; the second magnetic core part further comprises a third side wall and a fourth side wall arranged oppositely; and the second bottom plate connects the third side wall and the fourth side wall; the energy storage inductor further comprises a connecting plate; the connecting plate is arranged between and connected to the first side wall and the third side wall; and the connecting plate is also arranged between and connected to the second side wall and the fourth side wall; the first middle column and the second middle column are arranged on the two sides of the connecting plate respectively.

5. The energy storage inductor of claim 1, wherein, the energy storage inductor further comprises a first coil and a second coil; the first coil is wound on the first middle column; and the second coil is wound on the second middle column.

6. The energy storage inductor of claim 5, wherein, the first coil and the second coil have the same number of turns and the same winding direction.

7. The energy storage inductor of claim 5, wherein, the first coil comprises a first current input end and a first current output end; the second coil comprises a second current input end and a second current output end; the energy storage inductor further comprises a back plate connected to the first bottom plate and the second bottom plate; the back plate comprises a first lead-out hole, a second lead-out hole, a third lead-out hole and a fourth lead-out hole; the first current input end is electrically connected to a first signal input end through the first lead-out hole; the first current output end is electrically connected to a first signal output end through the second lead-out hole; the second current input end is electrically connected to a second signal input end through the third lead-out hole; and the second current output end is electrically connected to a second signal output end through the fourth lead-out hole.

8. The energy storage inductor of claim 5, wherein, the first coil comprises a first current input end and a first current output end; and the second coil comprises a second current input end and a second current output end; the energy storage inductor further comprises a back plate connected to the first bottom plate and the second bottom plate; the back plate comprises a fifth lead-out hole and a sixth lead-out hole; the first current output end is electrically connected to the second current input end; the first current input end is electrically connected to a third signal output end through the fifth lead-out hole; and the second current output end is electrically connected to a third signal input end through the sixth lead-out hole.

9. The energy storage inductor of claim 1, wherein, the first bottom plate comprises a first upper surface, a first lower surface, a first sub-lateral surface and a second sub-lateral surface; The first lower surface is located on a side of the first lower surface away from the first middle column, and an area of the first upper surface is less than an area of the first lower surface; the first sub-side surface connects the first upper surface and the second sub-side surface; the second sub-side surface connects the first lower surface; and an included angle a between the first sub-side surface and the second sub-side surface satisfies 90° The second bottom plate comprises a second upper surface, a second lower surface, a third sub-side surface, and a fourth sub-side surface; The second lower surface is located on a side of the second lower surface away from the second middle column, and an area of the second upper surface is less than an area of the second lower surface; the third sub-side surface connects the second upper surface and the fourth sub-side surface; the fourth sub-side surface connects the second lower surface; and an included angle a between the third sub-side surface and the fourth sub-side surface satisfies 90° 10. The energy storage inductor of claim 1, wherein, The energy storage inductor further comprises an insulating film; The insulating film is wrapped on surfaces of the first middle column and the second middle column.

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