Deformable ferrite shielding structure and coil device for underwater wireless charging

Abstract

The present invention provides a deformable ferrite shielding structure and a coil device for underwater wireless charging, which belongs to the technical field of power supply circuit devices or systems. In the shielding structure, the transmitting end coil assembly is installed to the substrate of the shell in the cylindrical member of the shell, and the cylindrical wall of the cylindrical member is surrounded by a slideway corresponding to the electromagnet one by one; the storage capsule is annular and is coaxially connected to the substrate with the cylindrical member in the cylindrical member, the storage capsule is deformable, the inner cavity is filled with magnetic fluid, and a ferrite layer is attached to the inner cavity wall; multiple crank slider mechanisms drive the corresponding electromagnets to slide along the slideway under the drive of the motor to control the movement of the magnetic fluid in the storage capsule. The present invention can effectively confine the high-frequency discrete magnetic field generated by the coil during the charging process to the space between the couplers. This efficient magnetic shielding mechanism can effectively isolate the high-frequency discrete magnetic field, prevent it from forming eddy currents outside the coil coupling area and causing charging system parameter fluctuations and energy loss, thereby improving the efficiency of underwater wireless charging.

Description

Technical Field

[0001] The present invention belongs to the technical field of power supply circuit devices or systems, and specifically relates to a deformable ferrite shielding structure for underwater wireless charging and a coil device for underwater wireless charging. Background Art

[0002] Underwater equipment such as unmanned underwater vehicles (UUVs) widely use underwater wireless power transmission technology to recharge power, which can improve the endurance and concealment of UUVs. When charging, the UUV autonomously approaches the transmitting coil on the wireless charging device at the base station and docks the receiving coil with the transmitting coil, and starts wireless power transmission after the two are aligned.

[0003] However, at present, during the underwater wireless charging process of UUV, there is a high-frequency discrete magnetic field outside the coil coupling area, which will diffuse freely in the water and form eddy currents. The eddy current effect will cause fluctuations in the charging system parameters and energy loss, thereby reducing the efficiency of power transmission.

[0004] The traditional discrete magnetic field shielding method uses shielding coils and media to weaken the discrete magnetic field. Specifically, coils are arranged around the wireless charging device and the discrete magnetic field is weakened by adjusting the amplitude and phase of the coil current. However, the effect of these measures is limited and can only weaken the discrete magnetic field to a certain extent, and cannot completely eliminate magnetic leakage and its impact on system performance. Summary of the invention

[0005] The purpose of the present invention is to solve the problem of low charging efficiency caused by the presence of high-frequency discrete magnetic fields outside the coil coupling area during underwater wireless charging of UUVs in the prior art, and to provide a deformable ferrite shielding structure for underwater wireless charging and a coil device for underwater wireless charging. Different from traditional shielding strategies, the core of the present invention is to use a special magnetic fluid capsule structure as a magnetic shielding layer. Specifically, a capsule structure filled with magnetic fluid and attached with a ferrite layer is used for magnetic shielding, and the shape of the storage capsule is controlled by attracting the magnetic fluid by an electromagnet, so that the discrete magnetic field generated by the coupler is fully and efficiently confined to a predetermined area, effectively isolating the high-frequency discrete magnetic field generated by the coil, and preventing it from forming eddy currents outside the coil coupling area to cause charging system parameter fluctuations and energy loss, thereby improving the efficiency of underwater wireless charging.

[0006] To achieve the above purpose, the technical solution provided by the present invention is:

[0007] A deformable ferrite shielding structure for underwater wireless charging, comprising a housing, a storage capsule, a plurality of crank slider mechanisms, and a first motor and an electromagnet arranged in one-to-one correspondence with the crank slider mechanisms;

[0008] The housing comprises a base plate and a cylindrical member connected to each other, a transmitting end coil assembly including a transmitting end coil is mounted to the base plate in the cylindrical member, and a plurality of slideways corresponding to the electromagnets are surrounded on the cylindrical wall of the cylindrical member;

[0009] The storage capsule is annular and is coaxially connected to the base plate inside the cylindrical member, and is used to surround the transmitting end coil and the receiving end coil inside the ring and fit with the two during the charging process. The storage capsule is deformable, the inner cavity is filled with magnetic fluid, and the inner cavity wall is attached with a ferrite layer;

[0010] The crank slider mechanism is evenly installed on the base plate in the outer circumferential direction of the cylindrical member, and is used to drive the corresponding electromagnet to slide along the slideway under the drive of the corresponding first motor to control the movement of the magnetic fluid in the storage capsule.

[0011] Furthermore, the shielding structure also includes a plurality of lifting mechanisms, which are installed to the base plate in the cylindrical member and connected to the storage capsule, and are used to move the storage capsule along its axis.

[0012] Furthermore, the lifting mechanism includes a second motor and a connecting block, the second motor is a reciprocating telescopic motor and is fixed to the base plate, the connecting block is coaxially connected to the output shaft of the second motor and is fixedly connected to the storage bag.

[0013] Furthermore, the first motor is mounted on the base plate and is used to drive the crank in the crank slider mechanism to rotate. The slider in the crank slider mechanism is clamped in the slideway, and the electromagnet is fixedly connected to the slider in the cylindrical member.

[0014] Further, the slideway extends from one end of the cylindrical member to the other end along the axial direction of the cylindrical member.

[0015] Further, a ferrite layer is laminated to the inner cavity wall of the reservoir.

[0016] Furthermore, the cross section of the storage bag is elliptical.

[0017] A coil device for underwater wireless charging, comprising a transmitting coil assembly for being arranged at an underwater wireless charging base station and a receiving coil assembly for being arranged on underwater equipment, wherein the transmitting coil assembly comprises a transmitting magnetic core and a transmitting coil, and the receiving coil assembly comprises a receiving magnetic core and a receiving coil. The coil device also comprises the above-mentioned deformable ferrite shielding structure for underwater wireless charging, and the transmitting coil assembly is mounted to the shielding structure.

[0018] The advantages of the present invention are:

[0019] 1. The deformable ferrite shielding structure for underwater wireless charging of the present invention provides an annular deformable storage capsule filled with magnetic fluid between the receiving end and the transmitting end, and a ferrite layer that can shield the magnetic field is arranged on the storage capsule. When the receiving end on the UUV is aligned with the transmitting end at the shielding structure, the storage capsule can surround the receiving end coil and the transmitting end coil on the inner side of the ring, and the crank slider mechanism can drive the electromagnet to move, and the shape of the storage capsule and the ferrite layer can be adjusted by the electromagnet to change the distribution of the magnetic fluid in the storage capsule to achieve the best magnetic shielding effect. Therefore, the present invention can effectively confine the high-frequency discrete magnetic field generated by the coil during the charging process in the space between the couplers. This efficient magnetic shielding mechanism can effectively isolate the high-frequency discrete magnetic field generated by the coil, prevent it from freely diffusing in the water outside the coil coupling area and forming eddy currents to cause fluctuations in charging system parameters and energy loss, thereby improving the efficiency of underwater wireless charging, shortening the charging time of underwater equipment, and extending the underwater operation time of equipment.

[0020] 2. During the underwater wireless charging process, the magnetic fluid capsule acts as a solid barrier to isolate the potential impact of high-frequency discrete magnetic fields on sensitive components inside the aircraft. This avoids the degradation or damage of component performance caused by magnetic field interference, ensures the stable operation of various systems of the aircraft, and improves its overall safety and reliability.

[0021] 3. The design of the magnetic fluid capsule completely wrapping the receiving coil and the transmitting coil confines the magnetic field inside the coupler, greatly reducing the risk of the aircraft being detected by the outside world due to magnetic radiation. This feature is particularly important for aircraft performing covert missions, as it can effectively improve the concealment of the aircraft and ensure its safety in complex underwater environments.

[0022] 4. The present invention also provides a lifting mechanism. During the docking process between the receiving end and the transmitting end, the storage bag can be first lifted and fitted with the receiving end coil, and then lowered together. This guides the receiving end and prevents the receiving end from being affected by the ocean current during the charging docking process and colliding with the mechanism of the present invention and being damaged, thereby improving the safety of UUV underwater wireless charging.

[0023] 5. Compared with the existing underwater wireless charging coil device, the coil device for underwater wireless charging of the present invention can isolate the high-frequency discrete magnetic field generated by the coil in the space between the couplers due to the addition of a deformable ferrite shielding structure, thereby preventing it from freely diffusing in the water outside the coil coupling area and forming eddy currents to cause charging system parameter fluctuations and energy loss, thereby improving the underwater wireless charging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or other features and advantages of the present invention will become more easily understood through the following description with reference to the accompanying drawings, which are not drawn to scale and some features are exaggerated or reduced to show details of specific components. In the accompanying drawings:

[0025] Figure 1 is a schematic three-dimensional diagram of a deformable ferrite shielding structure for underwater wireless charging of the present invention;

[0026] Figure 2 is a cross-sectional view of a deformable ferrite shielding structure for underwater wireless charging of the present invention;

[0027] Figure 3 is a cross-sectional view of the deformable ferrite shielding structure for underwater wireless charging of the present invention docking with a receiving end during use;

[0028] Figure 4 is a schematic three-dimensional diagram of a cylindrical member of a housing in the present invention;

[0029] Figure 5 is a schematic three-dimensional diagram of the storage capsule of the present invention;

[0030] Figure 6 is a schematic stereogram of the slider crank mechanism of the present invention;

[0031] Figure 7 It is a partial cross-sectional view of the matching structure of the slider and the slideway in the present invention;

[0032] Figure 8 It is a working flow chart of the deformable ferrite shielding structure for underwater wireless charging of the present invention.

[0033] In the figure: 1-shell, 11-base plate, 12-cylindrical member, 13-slideway, 14-flange; 2-storage capsule, 21-inner cavity, 22-ring body, 23-protrusion; 3-crank slider mechanism, 31-crank, 32-connecting rod, 33-slider; 4-first motor; 5-electromagnet; 6-lifting mechanism, 61-second motor, 62-connecting block; 100-transmitter end magnetic core, 101-transmitter end coil, 200-receiver end magnetic core, 201-receiver end coil. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the accompanying drawings by means of exemplary embodiments of the present invention. It should be noted that the following detailed description of the present invention is only for the purpose of illustration, and is not intended to limit the present invention.

[0035] The present invention provides a deformable ferrite shielding structure for underwater wireless charging and a coil device for underwater wireless charging. The shielding structure is used to connect to an underwater wireless charging base station to dock with underwater equipment such as UUV that needs to be powered, so as to perform wireless charging. The receiving end coil assembly is arranged on the underwater equipment, and the transmitting end coil assembly is arranged on the shielding structure. When the UUV needs to be powered, the two are docked to realize wireless power transmission.

[0036] The present invention utilizes a specially made magnetic fluid capsule structure for magnetic shielding. The magnetic fluid is contained in a deformable capsule with a ferrite layer attached to the inner wall. The core of the magnetic fluid is that nanoscale magnetic particles (about 10 nanometers in diameter) are wrapped by a carefully designed long-chain surfactant layer and evenly suspended in a specific base liquid to form a stable and uniform colloidal system. The uniqueness of magnetic fluid is that it combines the fluidity of liquid with the magnetism of solid. By arranging an electromagnet around the magnetic fluid and energizing the electromagnet, the magnetic fluid can be attracted to flow toward the electromagnet, thereby changing the shape and shielding position of the capsule and the ferrite layer on the capsule.

[0037] The deformable ferrite shielding structure and coil device for underwater wireless charging provided by the present invention are now described in detail.

[0038] First, the deformable ferrite shielding structure for underwater wireless charging provided by the present invention is described.

[0039] Overall reference Figures 1 to 3 As an exemplary embodiment of the present invention, a deformable ferrite shielding structure for underwater wireless charging includes a shell 1, a storage capsule 2, a plurality of crank slider mechanisms 3, and a first motor 4 and an electromagnet 5 arranged one-to-one with the crank slider mechanisms 3. The shell 1 is used to support the shielding structure, connect it to the base station, and accommodate the transmitting end coil assembly, which may include a transmitting end magnetic core 100 and a transmitting end coil 101 laid thereon. Correspondingly, the receiving end coil assembly may include a receiving end magnetic core 200 and a receiving end coil 201 laid thereon. Figure 3 As shown in the figure, the storage capsule 2 is used to align with the receiving end coil 201, and is respectively attached to the transmitting end coil 101 and the receiving end coil 201 at both ends during the charging process to isolate the high-frequency discrete magnetic field generated by the coupler in the coupling area, and prevent these discrete magnetic fields from diffusing outside the coupling area to form eddy currents and cause charging system parameter fluctuations and energy loss. The crank slider mechanism 3 is used to drive the corresponding electromagnet 5 to slide on the housing 1 under the drive of the first motor 4.

[0040] Combination Figure 4The housing 1 may include a substrate 11 and a cylindrical member 12 connected to each other, and the axis of the cylindrical member 12 is substantially perpendicular to the substrate 11. The transmitting end coil assembly is mounted to the substrate 11 at the bottom of the cylindrical member 12, and the substrate 11 may be processed with an annular protrusion to accommodate the transmitting end coil assembly. The substrate 11 may also be fixed to the base station, and the substrate 11 may be circular or rectangular, and the present invention has no particular limitation on this. The material of the housing 1 is preferably resistant to seawater corrosion to extend the life of the entire shielding structure.

[0041] A plurality of slideways 13 are arranged around the wall of the cylindrical member 12, and in particular, a plurality of slideways 13 are arranged at equal intervals around the wall of the cylindrical member, which are in the form of through grooves extending from the outside of the cylinder to the inside of the cylinder. The slideways 13 provide guidance for the electromagnets 5, and correspond one-to-one with the electromagnets 5, that is, the number of slideways 13 is the same as the number of electromagnets 5. The slideway 13 extends from one end of the cylindrical member 12 to the other end. In some embodiments, the slideway 13 extends from one end of the cylindrical member 12 to the other end along the axial direction of the cylindrical member 12, so that the movement trajectory of the electromagnet 5 is parallel to the axis of the cylindrical member 12. For this arrangement structure, those skilled in the art will understand that the end of the slideway 13 away from the substrate 11 is closed to prevent the electromagnet 5 from detaching from the slideway 13.

[0042] The cylindrical member 12 and the base plate 11 may be a single integrally formed component or may be processed separately. Specifically, the cylindrical member 12 may be provided with a flange 14 at the axial end close to the base plate 11 , and fasteners such as screws may pass through the flange 14 to connect the cylindrical member 12 to the base plate 11 .

[0043] Reference Figure 5 , the capsule 2 is annular and is coaxially connected to the substrate 11 inside the cylindrical member 12 and the cylindrical member 12, and is used to surround the transmitting end coil 101 and the receiving end coil 201 inside the ring and fit with the two during the charging process. The cross-section of the capsule 2 can be elliptical to facilitate gradual fit with the coupler, but this is not intended to limit the present invention. The capsule 2 is deformable and made of corrosion-resistant elastic material to resist erosion by seawater. The inner cavity 21 of the capsule 2 is an annular cavity, and a ferrite layer that can shield the magnetic field is attached to the inner cavity wall to allow the shielding and isolation of discrete magnetic fields in the coupling area to avoid the existence of discrete magnetic fields outside the coupling area and affect the charging system. The ferrite layer can be attached to the inner cavity wall of the capsule 2 by a lamination process. During underwater wireless charging, the capsule with a ferrite layer acts as a solid barrier to isolate the potential impact of high-frequency discrete magnetic fields on sensitive components inside the aircraft. This avoids component performance degradation or damage caused by magnetic field interference, ensures the stable operation of various systems of the aircraft, and improves its overall safety and reliability.

[0044] The inner cavity 21 of the capsule 2 is filled with magnetic fluid. As mentioned above, magnetic fluid combines the fluidity of liquid and the magnetism of solid. The magnetic fluid is provided in the capsule 2 to make the magnetic fluid flow by means of the interaction between the magnetic fluid and the electromagnet 5 (described in detail below). When the magnetic fluid in the capsule 2 moves, the deformable capsule 2 and the ferrite layer attached thereto will deform accordingly, thereby achieving a change in the shielding effect. By controlling the multiple electromagnets arranged around the capsule 2, each electromagnet can be in a different axial position relative to the capsule 2, so that the capsule 2 can reach the best position with the best shielding effect, thereby achieving the best shielding effect. The complete wrapping design of the magnetic fluid capsule for the receiving end coil and the transmitting end coil allows the magnetic field to be efficiently bound inside the coupler, greatly reducing the risk of the aircraft being detected by the outside world due to magnetic radiation. This feature is particularly important for aircraft performing covert missions. It can effectively improve the concealment of the aircraft and ensure its safety in complex underwater environments.

[0045] In order to achieve the installation and fixation of the storage capsule 2, the storage capsule 2 can be designed to include a ring body 22 and a protrusion 23, and the protrusion 23 is used to connect the storage capsule 2 to the base plate 11. The ring body 22 and the protrusion 23 can be an integral piece, and the protrusion 23 protrudes radially outward from the end of the ring body 22 close to the base plate 11. The ring body 22 and the protrusion 23 can also be independent parts.

[0046] Combination Figure 6 The slider crank mechanism 3 is evenly mounted on the base plate 11 in the outer circumferential direction of the cylindrical member 12, and is used to drive the corresponding electromagnet 5 to slide along the corresponding slideway 13 under the drive of the corresponding first motor 4, so as to control the movement of the magnetic fluid in the storage capsule 2. In particular, the first motor 4 is mounted on the base plate 11, and is used to drive the crank 31 in the slider crank mechanism 3 to rotate, and then transmit the movement to the slider 33 via the connecting rod 32, so as to realize the translation movement of the slider 33 along the slideway 13. The slider crank mechanism 3 can be realized by known mature technology, which will not be described in detail herein.

[0047] like Figure 7 As shown, the slider 33 in the crank slider mechanism 3 can be snapped into the slideway 13 and will not fall off the slideway 13, and the electromagnet 5 is fixedly connected to the slider 33 in the cylindrical member 12 to interact with the magnetic fluid in the storage bag 2 which is also located in the cylindrical member 12. The number of crank slider mechanisms 3 is the same as the number of electromagnets 5 and the number of slideways 13. In the embodiment shown, they are all arranged in six, but this is only an example, and other different numbers can also be selected.

[0048] In order to avoid the receiving end being affected by the ocean current during the charging docking process and colliding with the mechanism of the present invention and being damaged, and to further improve the safety of UUV underwater wireless charging, in an optional embodiment of the present invention, the shielding structure also includes a plurality of lifting mechanisms 6 for moving the storage capsule 2 along its axis. The number of the lifting mechanisms can be two, three, four, etc., as long as the storage capsule 2 can be lifted and lowered stably and reliably. The lifting mechanism 6 is installed to the base plate 11 in the cylindrical member 12 and connected to the storage capsule 2. In particular, the lifting mechanism may include a second motor 61 and a connecting block 62, the second motor 61 being a reciprocating telescopic motor and fixed to the base plate 11, the connecting block 62 being coaxially connected to the output shaft of the second motor 61, and being fixedly connected to the storage capsule 2, especially to the protrusion 23 of the storage capsule 2. During the docking process between the receiving end and the transmitting end, the storage capsule 2 can be first raised by the lifting mechanism 6, that is, first moved toward the receiving end coil 201, and then fitted with the receiving end coil 201, and then the storage capsule 2 and the receiving end coil 201 are lowered together, that is, close to the transmitting end coil 101 and gradually fitted with it, which can guide the receiving end to avoid collision with the shielding structure of the present invention and protect the UUV from damage during the charging process.

[0049] Next, Figure 3 The working principle of the deformable ferrite shielding structure for underwater wireless charging provided by the present invention is described with reference to the embodiments as examples.

[0050] Reference Figure 8 When the UUV needs to be powered, it approaches the underwater wireless charging base station. When the base station receives a signal indicating that the equipment is approaching, the shielding structure is activated. When the receiving end and the transmitting end are aligned axially, the lifting mechanism 6 can be operated to lift the storage capsule 2 so that the upper end of the storage capsule 2 fits with the receiving end coil 201. Then, the lifting mechanism 6 is operated to lower the storage capsule 2 and the receiving end coil 201 together so that the lower end of the storage capsule 2 also fits with the transmitting end coil 101. Thus, the storage capsule 2 with a ferrite layer surrounds both the receiving end coil 201 and the transmitting end coil 101 inside the ring, and the high-frequency discrete magnetic field generated by the coil can be confined within the coil coupling region between the couplers during the charging process. At this time, each first motor 4 is driven to make the corresponding crank slider mechanism 3 drive the corresponding electromagnet 5 to slide along the slide 13 on the shell 1 to change the position of the electromagnet. Since the electromagnet 5 will attract the movement of the magnetic fluid in the storage capsule 2, the distribution of the magnetic fluid in the storage capsule 2 is changed by adjusting the position of each electromagnet 5, so that the shape of the magnetic fluid capsule and the ferrite layer can be controlled. After the storage capsule reaches the optimal shielding position, the base station starts to emit high-frequency alternating current, and transmits electrical energy to the UUV through the divergent magnetic field coupling of the transmitting end coil and the receiving end coil. After completing the energy transmission, the UUV drives away, and the receiving end is separated from the shielding structure.

[0051] As described above, the deformable ferrite shielding structure for underwater wireless charging of the present invention can effectively confine the high-frequency discrete magnetic field generated by the coil during the charging process to the space between the couplers. This efficient magnetic shielding mechanism can effectively isolate the high-frequency discrete magnetic field generated by the coil, preventing it from freely diffusing in the water outside the coil coupling area and forming eddy currents, thereby causing fluctuations in charging system parameters and energy loss, thereby improving the efficiency of underwater wireless charging, shortening the charging time of underwater equipment, and extending the operating time of the equipment underwater.

[0052] The coil device for underwater wireless charging provided by the present invention is now described.

[0053] As an exemplary embodiment of the present invention, the coil device for underwater wireless charging includes a transmitting coil assembly for setting at an underwater wireless charging base station and a receiving coil assembly for setting on underwater equipment, wherein the transmitting coil assembly includes a transmitting magnetic core and a transmitting coil, and the receiving coil assembly includes a receiving magnetic core and a receiving coil. The coil device also includes the above-mentioned deformable ferrite shielding structure for underwater wireless charging provided by the present invention, and the transmitting coil assembly is installed to the shielding structure, specifically: as described above, it is installed to the substrate 11 at the bottom of the cylinder in the cylindrical member 12 of the shielding structure. The relevant structure, advantages and working process of the coil device can be found in the above description of the shielding structure, which will not be repeated here.

[0054] Compared with the existing underwater wireless charging coil device, the coil device for underwater wireless charging of the present invention can isolate the high-frequency discrete magnetic field generated by the coil in the space between the couplers due to the addition of a deformable ferrite shielding structure, thereby preventing the high-frequency discrete magnetic field generated by the coil from freely diffusing in the water outside the coil coupling area and forming eddy currents to cause charging system parameter fluctuations and energy loss, thereby improving the underwater wireless charging efficiency.

[0055] Finally, it should be noted that the features mentioned and / or shown in the above description of the exemplary embodiments of the present invention may be combined in the same or similar manner into one or more other embodiments, combined with the features in other embodiments or substituted for the corresponding features in other implementations. The technical solutions obtained by these combinations or substitutions shall also be deemed to be included in the protection scope of the present invention.

Claims

1. A deformable ferrite shielding structure for underwater wireless charging, characterized in that: It includes a housing, a storage capsule, a plurality of crank slider mechanisms, and a first motor and an electromagnet arranged one-to-one corresponding to the crank slider mechanisms; The housing comprises a base plate and a cylindrical member connected to each other, a transmitting end coil assembly comprising a transmitting end coil is mounted to the base plate in the cylindrical member, and a plurality of slideways corresponding to the electromagnets are surrounded on the wall of the cylindrical member; The storage capsule is annular and is coaxially connected to the substrate inside the cylindrical member, and is used to surround the transmitting end coil and the receiving end coil inside the ring and fit with the two during the charging process. The storage capsule is deformable, the inner cavity is filled with magnetic fluid, and the inner cavity wall is attached with a ferrite layer; The crank slider mechanism is evenly installed on the base plate in the outer circumferential direction of the cylindrical member, and is used to drive the corresponding electromagnet to slide along the slideway under the drive of the corresponding first motor to control the movement of the magnetic fluid in the storage capsule.

2. The deformable ferrite shielding structure for underwater wireless charging according to claim 1, characterized in that: Also included are a plurality of lifting mechanisms, which are mounted to the base plate in the cylindrical member and connected to the storage capsule for moving the storage capsule along its axis.

3. The deformable ferrite shielding structure for underwater wireless charging according to claim 2, characterized in that: The lifting mechanism includes a second motor and a connecting block. The second motor is a reciprocating telescopic motor and is fixed to the base plate. The connecting block is coaxially connected to the output shaft of the second motor and is fixedly connected to the storage bag.

4. The deformable ferrite shielding structure for underwater wireless charging according to claim 1 or 2, characterized in that: The first motor is mounted on the base plate and is used to drive the crank in the crank slider mechanism to rotate. The slider in the crank slider mechanism is clamped in the slideway, and the electromagnet is fixedly connected to the slider in the cylindrical member.

5. The deformable ferrite shielding structure for underwater wireless charging according to claim 1 or 2, characterized in that: The slideway extends from one end of the cylindrical member to the other end along the axial direction of the cylindrical member.

6. The deformable ferrite shielding structure for underwater wireless charging according to claim 1 or 2, characterized in that: The ferrite layer is laminated to the inner cavity wall of the reservoir.

7. The deformable ferrite shielding structure for underwater wireless charging according to claim 1 or 2, characterized in that: The cross section of the storage bag is oval.

8. A coil device for underwater wireless charging, comprising a transmitting coil assembly for being arranged at an underwater wireless charging base station and a receiving coil assembly for being arranged on underwater equipment, wherein the transmitting coil assembly comprises a transmitting magnetic core and a transmitting coil, and the receiving coil assembly comprises a receiving magnetic core and a receiving coil, characterized in that: The coil device further comprises a deformable ferrite shielding structure for underwater wireless charging according to any one of claims 1 to 7, and the transmitting end coil assembly is mounted to the shielding structure.

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