Energy transmission device

Abstract

This utility model discloses an energy transmission device, including an energy sensing element and a coil. The energy sensing element includes a first sensing part and a second sensing part. The second sensing part is disposed adjacent to the first sensing part. The coil is disposed adjacent to the energy sensing element. The first sensing part and the second sensing part are made of different materials.

Description

Technical Field

[0001] This utility model relates to an energy transmission device. Background Technology

[0002] The common approach to improving core loss in current power transmission devices (such as wireless charging modules) is to select low-loss materials to reduce core loss. However, this approach may not always meet the required sensitivity in the design, and sometimes sensitivity needs to be sacrificed to achieve the desired result. Utility Model Content

[0003] This utility model provides an energy transmission device according to one embodiment. The energy transmission device includes an energy sensor and a coil. The energy sensor includes a first sensing part and a second sensing part. The second sensing part is disposed adjacent to the first sensing part. The coil is disposed adjacent to the energy sensor. The first sensing part and the second sensing part are made of different materials.

[0004] To provide a better understanding of the above and other aspects of this utility model, specific embodiments are described below in conjunction with the accompanying drawings: Attached Figure Description

[0005] Figure 1 A schematic diagram of an energy transmission system according to an embodiment of the present invention is shown;

[0006] Figure 2A A schematic diagram of an energy transmission device according to an embodiment of the present invention is shown;

[0007] Figure 2B Draw Figure 2A The schematic diagram of the energy transmission device omits the first cover;

[0008] Figure 2C Draw Figure 2A The schematic diagram of the energy transmission device omits the first cover and the coil carrier.

[0009] Figure 3A and Figure 3B Draw Figure 2A Exploded views of the energy transmission device from different perspectives;

[0010] Figure 4 Draw Figure 2A A cross-sectional view of the energy transmission device along direction 4-4';

[0011] Figure 5A Draw Figure 2A The characteristic graphs of magnetic flux density, magnetic field strength, core loss and total current of the energy transmission device;

[0012] Figure 5B Draw Figure 2AA diagram showing the relationship between the thickness of the second sensing part of the energy transmission device and the coupling coefficient and self-inductance.

[0013] Figure 5C Draw Figure 2A A graph showing the relationship between the thickness of the second sensing element and the energy loss in an energy transmission device.

[0014] Figure 6 A schematic diagram of an energy transmission device according to another embodiment of the present invention is shown;

[0015] In the attached figures, the following labels are used:

[0016] 10: Energy transmission system;

[0017] 11: Power supply module;

[0018] 11A: PFC device;

[0019] 11B: First conversion device;

[0020] 12: Power receiving module;

[0021] 12A: Energy sensing device;

[0022] 12B: Second conversion device;

[0023] 13: Power supply;

[0024] 14: Battery;

[0025] 100, 200: Energy transmission device;

[0026] 110: Coil;

[0027] 110A: First terminal;

[0028] 110B: Second end;

[0029] 111: Partial;

[0030] 120, 220: Energy sensing element;

[0031] 121: First sensing unit;

[0032] 1211: First sensor sheet;

[0033] 121a, 122a, 140a: Through holes;

[0034] 121u: First page;

[0035] 121b: Second page;

[0036] 121aw, 122aw, 130aw: Inner surface;

[0037] 122as: outer surface;

[0038] 122,222: Second sensing unit;

[0039] 1221: Second sensor sheet;

[0040] 122u: Third side;

[0041] 122b: Page 4;

[0042] 130: Coil carrier plate;

[0043] 130a: Through hole;

[0044] 130u1: First surface;

[0045] 130u2: Second surface;

[0046] 130b: Third surface;

[0047] 130r: First groove;

[0048] 131: Protrusion;

[0049] 132: Limiting part;

[0050] 132A: First limiting part;

[0051] 132B: Second limiting part;

[0052] 140: Induction carrier disk;

[0053] 140u: Fifth side;

[0054] 140b: Page 6;

[0055] 140p: Opening;

[0056] 141: Limiting wall;

[0057] 150: First cover;

[0058] 150r: Second groove;

[0059] 160: Second cover;

[0060] 160u: Seventh side;

[0061] 160b: Page 8;

[0062] 160r1: first concave part;

[0063] 160r2: second concave part;

[0064] 160a: Opening;

[0065] d1: Outer diameter;

[0066] h1: Depth;

[0067] I1, I2: Current;

[0068] LGA: Primary side self-inductance;

[0069] LVA: Secondary self-inductance;

[0070] R1: Interval;

[0071] t1: First thickness;

[0072] t2: Second thickness. Detailed Implementation

[0073] Please refer to Figures 1-4 , Figure 1 A schematic diagram of an energy transmission system 10 according to an embodiment of the present invention is shown. Figure 2A A schematic diagram of an energy transmission device 100 according to an embodiment of the present invention is shown. Figure 2B Draw Figure 2A The schematic diagram of the energy transmission device 100 omitting the first cover 150 is omitted. Figure 2C Draw Figure 2A The schematic diagram of the energy transmission device 100 omitting the first cover 150 and the coil carrier 130 is omitted. Figure 3A and Figure 3B Draw Figure 2A The energy transmission device 100 is shown in exploded views from different angles. Figure 4 Draw Figure 2A A cross-sectional view of the energy transmission device 100 along direction 4-4'.

[0074] like Figure 1 As shown, the energy transfer system 10 is, for example, a wireless charging system, which includes a power supply module 11 and a power receiving module 12. The power supply module 11 is electrically connected to a power source 13, and the power receiving module 12 is electrically connected to a battery 14. The power supply module 11 and the power receiving module 12 can, for example, transfer energy wirelessly. For example, the power source 13 provides a current I1 to the power supply module 11, which generates a magnetic field in the power supply module 11. The power receiving module 12 can sense this magnetic field and generate a current I2 stored in the battery 14. The power supply module 11 includes a PFC device 11A, a first conversion device 11B, and an energy transfer device 100, while the power receiving module 12 includes an energy sensing device 12A and a second conversion device 12B.

[0075] like Figure 1As shown, the energy transfer device 100 and the energy sensing device 12A are, for example, wireless charging devices. In this embodiment, the energy transfer device 100 can be referred to as a primary-side sensing device, and the energy sensing device 12A can be referred to as a secondary-side sensing device. The energy transfer device 100 and the energy sensing device 12A include the same or corresponding structural features, and the following description uses the energy transfer device 100 as an example.

[0076] like Figure 3A and Figure 3B As shown, the energy transmission device 100 includes a coil 110, an energy sensor 120, a coil carrier 130, an induction carrier 140, a first cover 150, and a second cover 160. The coil 110, the energy sensor 120, the coil carrier 130, and the induction carrier 140 are disposed between the first cover 150 and the second cover 160.

[0077] In this embodiment, the energy sensing element 120 is, for example, a magnetic core. A magnetic core is a magnetic material with high permeability, which can be used to confine and guide the magnetic field in electrical, electromechanical, and magnetic devices (e.g., electromagnets, transformers, motors, generators, inductors). Compared to the absence of a magnetic core, a magnetic core can increase the magnetic field strength in an electromagnetic coil by hundreds of times. The energy sensing element 120 includes a first sensing portion 121 and a second sensing portion 122. The second sensing portion 122 is disposed adjacent to the first sensing portion 121. The coil 110 is disposed adjacent to the energy sensing element 120. The first sensing portion 121 and the second sensing portion 122 are made of different materials. This reduces the total loss of the energy transmission device 100. In other words, the permeability of the first sensing portion 121 is less than the permeability of the second sensing portion 122.

[0078] like Figure 3A and Figure 3B As shown, coil 110 is, for example, the coil of a charging device. Coil 110 is, for example, made of copper. Coil 110 can be wound several times and has a first end 110A and a second end 110B. The first end 110A and the second end 110B can be electrically connected to... Figure 1 The first conversion device 11B.

[0079] In one embodiment, the first sensing element 121 may be made of, for example, a ferromagnetic metal (e.g., iron) or a ferrimagnetic compound (e.g., ferrite), while the second sensing element 122 may be formed, for example, by stacking at least one magnetic patch. The magnetic patch may be made of, for example, a nanocrystalline magnetic core. The nanocrystalline magnetic core may be composed of, for example, iron, chromium, copper, silicon, and boron, and these specific alloy compositions are made amorphous using rapid quenching technology, followed by heat treatment to produce nano-sized grains. Nanocrystalline magnetic cores exhibit excellent magnetic properties and temperature stability. Due to the nanostructure of the nanocrystalline magnetic core, it combines the advantages of silicon steel, permalloy, and ferrite. The high permeability of the nanocrystalline magnetic core increases inductance, thus achieving the same inductance in a smaller volume.

[0080] like Figure 3A and Figure 3B As shown, the first sensing unit 121 has a first thickness t1, while the second sensing unit 122 has a second thickness t2. In one embodiment, the second thickness t2 may not be greater than the first thickness t1; for example, the second thickness t2 may be equal to or less than the first thickness t1. In another embodiment, depending on design requirements, the second thickness t2 may be equal to or even greater than the first thickness t1.

[0081] like Figure 3A , Figure 3B and 4 As shown in the figure, the first sensing part 121 has a through hole 121a and opposing first surfaces 121u and second surfaces 121b. The second sensing part 122 can be accommodated within the through hole 121a. In this embodiment, when the first sensing part 121 and the second sensing part 122 are combined, at least a portion of the second sensing part 122 is located within the through hole 121a of the first sensing part 121, and at least a portion of the outer surface 122as of the second sensing part 122 can contact at least a portion of the inner surface 121aw of the through hole 121a of the first sensing part 121. For example, as Figure 3A As shown, the first sensing part 121 can be disposed around the periphery of the second sensing part 122.

[0082] like Figure 3A and Figure 3BAs shown, the second sensing element 122 may be located between the first surface 121u and the second surface 121b, that is, the second sensing element 122 may not protrude beyond the first surface 121u and the second surface 121b. The second sensing element 122 has opposing third surfaces 122u and fourth surfaces 122b. In one embodiment, the third surface 122u of the second sensing element 122 may be substantially aligned (e.g., flush) with the first surface 121u of the first sensing element 121, and / or the fourth surface 122b of the second sensing element 122 may be substantially aligned (e.g., flush) with the second surface 121b of the first sensing element 121. In another embodiment, the third surface 122u of the second sensing element 122 is spaced apart from the first surface 121u of the first sensing element 121 by a distance and / or the fourth surface 122b of the second sensing element 122 is spaced apart from the second surface 121b of the first sensing element 121 by a distance.

[0083] like Figure 3A and Figure 3B As shown, the second sensing part 122 has a through hole 122a. The aforementioned coil 110 can pass through the through hole 122a. In this embodiment, the through hole 122a does not extend to the outer surface 122as of the second sensing part 122, that is, the through hole 122a does not expose an opening from the outer surface 122as of the second sensing part 122. In another embodiment, the through hole 122a can be formed between the first sensing part 121 and the second sensing part 122, that is, the through hole 122a is formed by the first sensing part 121 and the second sensing part 122 surrounding each other.

[0084] In this embodiment, due to the design of the through-hole 122a, a portion of the coil 110 does not overlap vertically with another portion of the coil 110 (overlapping would result in additional copper losses). Therefore, the energy transmission device 100 is suitable for high-power (e.g., kilowatt (kW) level) energy transmission. Furthermore, when the coil 110 passes through the through-hole 122a, the magnetic flux generated by the current causes partial saturation of the magnetic core around the through-hole 122a, resulting in high losses. However, the aforementioned high-loss problem can be mitigated by the material design of the second sensing part 122 in this embodiment.

[0085] like Figure 3A and Figure 3B As shown, the first sensing element 121 includes a plurality of first sensing plates 1211. These first sensing plates 1211 may be connected side by side along the XY plane. The X, Y and Z axes in the illustration are, for example, perpendicular to each other. A through hole 121a is formed by the plurality of first sensing plates 1211 surrounding it. In another embodiment, the first sensing element 121 may be a single sensing plate having a through hole 121a.

[0086] like Figure 3A and Figure 3BAs shown, the first sensing unit 121 includes a plurality of second sensing sheets 1221. These second sensing sheets 1221 can be connected side-by-side along the XY plane. These second sensing sheets 1221 can be stacked along the Z-axis to form an N-layer structure, where N is, for example, a positive integer between 1 and 10, but may be more or less. In one embodiment, the second sensing sheet 1221 is, for example, a magnetic patch. In one embodiment, the thickness of a single second sensing sheet 1221 (e.g., along the Z-axis) is, for example, 0.365 mm, but may be thinner or thicker.

[0087] like Figure 3A and Figure 4 As shown, the coil carrier 130 can hold the coil 110. The coil carrier 130 has a first surface 130u1, a second surface 130u2, a third surface 130b, a first groove 130r, and a through hole 130a. The first groove 130r extends from the first surface 130u1 to the second surface 130u2, and the coil 110 can be accommodated in the first groove 130r. The through hole 130a extends from the first surface 130u1 to the third surface 130b, that is, the through hole 130a penetrates the coil carrier 130, so that a portion 111 of the coil 110 can extend from the first groove 130r through the through hole 130a to the side of the third surface 130b. In one embodiment, the through hole 130a has an inner surface 130aw, which is, for example, a slope, to guide the coil 110 through the through hole 130a. In detail, the inner surface 130aw can extend obliquely from the second surface 130u2 toward the third surface 130b. In this way, the portion 111 of the coil 110 can smoothly pass through the through hole 130a by means of the oblique characteristic of the inner surface 130aw.

[0088] like Figure 3B and Figure 4 As shown, the coil carrier 130 further includes at least one protrusion 131. The protrusion 131 is connected to and protrudes from the third surface 130b of the coil carrier 130. The protrusion 131 can constrain the displacement of the second sensing part 122. For example, the protrusion 131 can extend into the through hole 121a of the first sensing part 121 and be adjacent to the third surface 122u of the second sensing part 122 to constrain the relative displacement of the second sensing part 122 and the coil carrier 130 along the Z-axis. In this embodiment, the protrusion 131 can abut against the third surface 122u of the second sensing part 122 to fix the relative position of the second sensing part 122 and the coil carrier 130 along the Z-axis.

[0089] like Figure 3B and Figure 4As shown, the coil carrier 130 further includes at least one limiting portion 132, which is connected to the third surface 130b and protrudes relative to the third surface 130b. When the coil carrier 130 is combined with the energy sensor 120, the limiting portion 132 is located within the through hole 122a of the second sensing portion 122 and adjacent to the inner side surface 122aw of the through hole 122a, thereby restraining the relative displacement of the second sensing portion 122u along the XY plane.

[0090] like Figure 3B and Figure 4 As shown, in this embodiment, the limiting portions 132 include at least two first limiting portions 132A and two second limiting portions 132B. The two first limiting portions 132A are configured opposite each other along the X-axis (e.g., a first direction) to constrain the relative displacement of the second sensing portion 122 and the coil carrier 130 along the + / - X-axis. The other two second limiting portions 132B are configured opposite each other along the Y-axis (e.g., a second direction) to constrain the relative displacement of the second sensing portion 122 and the coil carrier 130 along the + / - Y-axis. In one embodiment, the first limiting portions 132A and the second limiting portions 132B abut against the inner surface 122aw of the through hole 122a of the second sensing portion 122 to fix the relative position of the second sensing portion 122 and the coil carrier 130 along the XY plane.

[0091] like Figure 2B , Figure 2C , Figure 3A and Figure 4 As shown, the induction carrier 140 can carry the energy sensor 120. For example, the induction carrier 140 has a through hole 140a and opposing fifth surfaces 140u and sixth surfaces 140b, wherein the through hole 140a extends from the fifth surface 140u to the sixth surface 140b. The aforementioned coil 110 can pass through the through hole 140a to extend to the side of the sixth surface 140b. The induction carrier 140 has an opening 140p through which the first end 110A of the coil 110 can extend to the outside of the induction carrier 140. Here, the induction carrier 140 further includes a limiting wall 141, which is connected to the sixth surface 140b and protrudes opposite to the sixth surface 140b to restrain the relative displacement of the coil 110 and the induction carrier 140.

[0092] like Figure 3A , Figure 3B and Figure 4As shown, the first cover 150 has a second groove 150r. The coil 110 can be disposed between the first groove 130r of the coil carrier 130 and the second groove 150r of the first cover 150. The second groove 150r of the first cover 150 overlaps with the first groove 130r of the coil carrier 130 along the Z-axis. Thus, when the outer diameter d1 of the coil 110 is greater than the depth h1 of the first groove 130r, the coil 110 can be partially accommodated within the second groove 150r, thereby avoiding interference between the solid materials of the coil 110 and the first cover 150. In another embodiment, if the outer diameter d1 of the coil 110 is not greater than the depth h1 of the first groove 130r, the second groove 150r can be omitted from the first cover 150.

[0093] like Figure 2B , Figure 2C , Figure 3A and Figure 4 As shown, the second cover 160 has a first recess 160r1, a second recess 160r2, opposing seventh surfaces 160u and eighth surfaces 160b, and an opening 160a. The first recess 160r1 and the second recess 160r2 extend from the seventh surface 160u toward the eighth surface 160b. The coil 110, located on the side of the third surface 130b of the coil carrier 130, can be accommodated in the first recess 160r1 to avoid excessive interference between the coil 110 and the solid material of the second cover 160. The second recess 160r2 connects the first recess 160r1 and the opening 160a. The coil 110 can extend beyond the second cover 160 through the opening 160a. For example, the first end 110A and the second end 110B of the coil 110 can extend beyond the energy transmission device 100 through the opening 160a.

[0094] As shown in Table 1 below, K is the coupling coefficient between the primary and secondary inductors. The coupling coefficient is, for example, a real number between 0 and 1 (including endpoint values). The closer the coupling coefficient is to 1, the tighter the coupling between the two inductors and the higher the energy transfer efficiency; if the coupling coefficient is 0, it means that there is no mutual inductance between the two inductors, and the two inductors are independent. L GA It is the self-inductance of the primary-side sensing device (hereinafter referred to as "primary-side self-inductance"), and L VA This is the self-inductance of the secondary-side inductor (hereinafter referred to as "secondary-side self-inductance"). Primary-side self-inductance L GA Secondary self-inductance L VA The unit of mutual inductance is, for example, μH, while the units of core loss (iron loss), copper loss, and total loss are, for example, watts. Total loss is equal to the sum of iron loss and copper loss.

[0095] Table 1

[0096]

[0097] By adjusting the thickness of the second sensing element 122, the self-inductance L can be changed. GA L VA Mutual inductance, coupling coefficient K, and / or total loss are further illustrated below with examples.

[0098] In Comparative Example 1, the thickness of the second sensing element 122 is maintained equal to that of the first sensing element 121. This thickness design results in the primary side self-inductance L... GA and secondary side self-inductance L VA It is higher than the control group (because the magnetic patch has high permeability, which can increase the inductance, thus achieving the same inductance in a smaller volume).

[0099] In this embodiment, a thinner magnetic patch is used than that in the control group, therefore the primary-side self-inductance L GA and secondary side self-inductance L VA It is lower than that of Comparative Example 1, but close to that of the control group (the self-inductance of the control group is, for example, the design target). The total loss is lower than that of Comparative Example 1 and also lower than that of the control group, indicating that the total loss is still improved (the total loss is lower than that of the control group, indicating that the total loss is improved).

[0100] In Comparative Example 2, a thinner magnetic patch was used than in the Example 1, therefore the primary-side self-inductance L... GA and secondary side self-inductance L VA The lower overall loss compared to the embodiment indicates that the thickness of the magnetic patch is insufficient.

[0101] In summary, in this embodiment, by designing the thickness of the second sensing element 122, the primary-side self-inductance L can be increased. GA and secondary side self-inductance L VA It is close to the control group (meets the sensitivity design target) and has lower total loss (improved total loss). In other words, by designing the thickness of the second sensing element 122, a lower total loss can be achieved under the same or close self-inductance design target.

[0102] Please refer to Figures 5A to 5C , Figure 5A Draw Figure 2A The characteristic diagrams of magnetic flux density, magnetic field strength, core loss, and terminal current of the energy transmission device 100 are shown. Figure 5B Draw Figure 2A The diagram shows the relationship between the thickness of the second sensing element of the energy transmission device 100 and the coupling coefficient and self-inductance. Figure 5C Draw Figure 2A A graph showing the relationship between the thickness of the second sensing part of the energy transmission device 100 and its losses.

[0103] Figure 5AThe solid lines represent the characteristics of magnetic flux density, magnetic field strength, and core loss in a region of the second sensing part 122 of the energy transmission device 100 (e.g., one of the second sensing elements 1221 adjacent to the through hole 122a), while the dashed lines represent the characteristics of magnetic flux density, magnetic field strength, and core loss in the energy transmission device of the control group (e.g., the energy sensing element is made of the same material). The terminal current can be used as a comparison benchmark to prove that the embodiment and the control group are compared under the same conditions.

[0104] The second sensing part 122 used in the energy transmission device 100 of this utility model embodiment is small in size, thus reducing iron core loss and thereby reducing total loss.

[0105] like Figure 5A The change in magnetic flux density (dashed line) of the energy transmission device in the control group is shown. Because the magnetic core reaches saturation magnetic flux density (e.g., in the interval R1, magnetic flux saturation occurs, and the change in magnetic flux density tends to level off), the change in magnetic field strength (ΔB) decreases, hysteresis loss decreases, and overall iron loss decreases. However, when the current decreases, the change in magnetic field strength begins to increase, and the iron loss increases significantly compared to saturation. In other words, if the magnetic flux density reaches the saturation magnetic flux density of the magnetic core, large losses will occur. Figure 5A The change in magnetic flux density of the energy transmission device 100 (solid line) is shown. Due to the design of the second induction unit 122, the magnetic flux density of the magnetic core is lower than the saturation magnetic flux density, thus reducing iron loss. In comparison, the average iron loss of the energy transmission device 100 of this embodiment is reduced to about 5.3W, compared to the average iron loss of the control group energy transmission device of about 5.85W.

[0106] like Figure 5B As shown, the horizontal axis represents the second thickness t2 of the second sensing unit 122, where "0.365 mm" represents the thickness of a single second sensing element 1221 within the second sensing unit 122. The scale value on the horizontal axis can be converted into the number of stacked layers of the second sensing unit 122. The coupling coefficient K decreases as the second thickness t2 of the second sensing unit 122 increases, while the primary-side self-inductance L... GA and secondary side self-inductance L VA The self-inductance L increases with the increase of the second thickness t2 of the second sensing part 122. In one embodiment, when the second thickness t2 of the second sensing part 122 is equal to 1.46 mm, a primary-side self-inductance of approximately 68.04 μH can be obtained. GA And the secondary self-inductance L is approximately 23.45 μH. VA The primary and secondary self-inductance values ​​are close to those of the control group (as shown in Table 1), which meets the self-inductance design target.

[0107] like Figure 5CAs shown, iron loss increases with the increase of the second thickness t2 of the second sensing part 122, but copper loss decreases with the increase of the second thickness t2 of the second sensing part 122. Overall, the total loss still increases with the increase of the second thickness t2 of the second sensing part 122. When the second thickness t2 of the second sensing part 122 is equal to 1.46 mm, a total loss of approximately 79.31 W can be obtained, which is lower than the total loss of the control group in Table 1, proving that the design of the second sensing part 122 in this embodiment of the present invention can reduce losses.

[0108] In summary, by designing the thickness of the second sensing unit 122, the "primary side self-inductance L" can be satisfied simultaneously. GA and secondary side self-inductance L VA This meets the inductance design objectives and reduces total losses. In another embodiment, if the primary side self-inductance L... GA and secondary side self-inductance L VA If the inductance design target is met, but the total loss is not reduced, a thinner second sensing element 1221 can be selected. In this embodiment, when the second thickness t2 of the second sensing element 122 is equal to 1.46 mm, the first thickness t1 of the first sensing element 121 is, for example, 3 mm. In other words, the ratio of the second thickness t2 of the second sensing element 122 to the first thickness t1 of the first sensing element 121 (i.e., t2 / t1) is, for example, not greater than 1, which can simultaneously satisfy the requirement of "primary-side self-inductance L". GA and secondary side self-inductance L VA This meets the sensitivity design objectives and reduces total loss. In one embodiment, the ratio of the second thickness t2 to the first thickness t1 can be between 0.4 and 0.9.

[0109] Please refer to Figure 6 The diagram illustrates an energy transmission device 200 according to another embodiment of the present invention. The energy transmission device 200 includes a coil 110, an energy sensor 220, a coil carrier 130, an induction carrier 140, a first cover 150, and a second cover 160. The coil 110, energy sensor 220, coil carrier 130, and induction carrier 140 are disposed between the first cover 150 and the second cover 160. The energy transmission device 200 has similar or identical technical features to the energy transmission device 100, with at least one difference: the structure of the energy sensor 220 differs from that of the energy sensor 120.

[0110] like Figure 6As shown, the energy sensor 220 is, for example, a magnetic core. The energy sensor 220 includes a first sensing portion 121 and a second sensing portion 222. The second sensing portion 222 is disposed adjacent to the first sensing portion 121. For example, the second sensing portion 222 may be disposed in the through-hole 121a of the first sensing portion 121. The second sensing portion 222 may or may not contact the inner surface 121aw of the through-hole 121a (i.e., spaced apart from each other). The first sensing portion 121 and the second sensing portion 222 are made of different materials. This reduces the total loss of the energy transmission device 200. The material, structure, and thickness design of the second sensing portion 222 are the same as or similar to those of the aforementioned second sensing portion 122, and will not be described again here. Unlike the aforementioned second sensing portion 122, the second sensing portion 222 may extend into a multi-coil or spiral shape.

[0111] In summary, this utility model provides an energy transmission device comprising at least one energy sensing element, such as a magnetic core. The energy sensing element comprises two parts, which are made of different materials. Through material design, the dual benefits of "meeting the inductance design target for both the primary and secondary sides" and "reducing total loss" can be achieved. In one embodiment, one of the two parts may be made of a ferromagnetic metal (e.g., iron) or a ferrimagnetic compound (e.g., ferrite), while the other part may be formed by stacking at least one magnetic patch, such as a nanocrystalline magnetic core. In one embodiment, one of the two parts may be at least partially located within a through-hole of the other part. In one embodiment, the two parts of the energy sensing element may have different or equal thicknesses. Through the thickness design of the two parts of the energy sensing element, both the "meeting the inductance design target for both the primary and secondary sides" and "reducing total loss" can be simultaneously satisfied.

[0112] In summary, although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the present invention. Those skilled in the art to which this invention pertains can make various modifications and refinements without departing from the spirit and scope of the present invention, and such modifications and refinements are not limited to the embodiments of the present invention, but are still within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope of the patent applications of the present invention.

Claims

1. An energy transmission device, characterized in that, include: An energy sensing device, comprising: A first sensing element; and A second sensing element is disposed adjacent to the first sensing element; and A coil is configured adjacent to the energy sensing element; The first sensing element and the second sensing element are made of different materials.

2. The energy transmission device as described in claim 1, characterized in that, The second sensing unit includes a plurality of sensing sheets, which are stacked in at least two layers.

3. The energy transmission device as described in claim 1, characterized in that, The first sensing element is made of ferrite, while the second sensing element is a nanocrystalline magnetic core.

4. The energy transmission device as described in claim 1, characterized in that, The first sensing part has a first thickness, and the second sensing part has a second thickness, the second thickness being less than the first thickness.

5. The energy transmission device as described in claim 1, characterized in that, The second sensing part has a through hole through which the coil passes.

6. The energy transmission device as described in claim 1, characterized in that, The first sensing part and the second sensing part surround a through hole, and the coil passes through the through hole.

7. The energy transmission device as described in claim 1, characterized in that, The first sensing part has a through hole, and the second sensing part is located inside the through hole and in contact with the inner side of the through hole.

8. The energy transmission device as described in claim 1, characterized in that, The first sensing part has a through hole, and the second sensing part is located inside the through hole and does not contact the inner side of the through hole.

9. The energy transmission device as described in claim 8, characterized in that, The second sensing part extends into a spiral shape.

10. The energy transmission device as claimed in claim 1, characterized in that, The second sensing element has a through hole, and the energy transmission device further includes: A coil carrier disk supports the coil and includes a limiting portion located within the through hole of the second sensing portion and adjacent to an inner side surface of the through hole.

11. The energy transmission device as claimed in claim 1, characterized in that, The second sensing element has a through hole, and the energy transmission device further includes: A coil carrier disk, carrying the coil and comprising: Two first limiting parts are arranged opposite each other along a first direction; The two second limiting parts are arranged opposite to each other along a second direction; Wherein, the first direction and the second direction are perpendicular to each other.

12. The energy transmission device as claimed in claim 1, characterized in that, Including: A sensing carrier plate, which carries the energy sensing element and has a through hole; The coil passes through the through hole of the induction carrier disk.

13. The energy transmission device as claimed in claim 1, characterized in that, Including: A coil carrier disk that carries the coil and has a first groove; as well as A first cover having a second groove; The coil is located between the first groove and the second groove.

14. The energy transmission device as claimed in claim 1, characterized in that, Including: A second cover has a recess and an opening, the opening communicating with the recess; The coil is located in the recess and extends beyond the second cover through the opening.

15. The energy transmission device as claimed in claim 1, characterized in that, Including: A coil carrier disk supports the coil and has a through hole with an inclined surface for guiding the coil through the through hole.

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