Coil module

Abstract

The utility model relates to the technical field of wireless charging, and particularly discloses a coil module, which comprises a bearing piece, a coil body and a magnetism isolating piece. Wherein the bearing piece is provided with a first bearing surface and a second bearing surface which are arranged back to back; the coil body comprises a spiral coil formed by winding a wire, and the spiral coil is adhered to the first bearing surface of the bearing part; the magnetic isolation part is arranged on the second bearing surface of the bearing part. The thickness of the bearing piece with the plate-shaped structure can be properly reduced, so that the overall thickness of the coil module can be reduced; in addition, the bearing piece without a groove structure is convenient to produce, and the production difficulty is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to wireless charging technical field especially relates to a coil module. BACKGROUND

[0002] The wireless charging technology of electric vehicle is based on the resonance electromagnetic induction principle, and the current is transmitted to the coil module at the bottom of the vehicle through the coil module in the charger, and the charging is started when the two are aligned. Among them, the coil module includes a coil and a carrier, because the charging power of the wireless charging of the electric vehicle is relatively high, the current through the coil is large, so the wire diameter of the coil is large, the carrier for fixing the coil generally adopts a plastic forming process, and is provided with a groove to prevent the charging coil from being misaligned, the above structure makes the thickness of the carrier large, thereby causing the thickness of the coil module to be large, and at the same time, the thickness of the carrier is not uniform, the forming process is complex, and the production difficulty is high.

[0003] Therefore, it is urgent to study a coil module to solve the above problems. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a coil module to solve the problem of large overall thickness of the coil module in the prior art and large production difficulty of the carrier.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The coil module comprises:

[0007] The carrier has a first carrier surface and a second carrier surface arranged opposite to each other;

[0008] The coil body comprises a spiral coil wound by a wire, and the spiral coil is bonded to the first carrier surface of the carrier;

[0009] The magnetic isolation piece is arranged on the second carrier surface of the carrier.

[0010] As an optional technical scheme of the coil module, the first carrier surface and the second carrier surface are both flat surfaces; and / or,

[0011] The thickness of the carrier is 0.5-2mm.

[0012] As an optional technical scheme of the coil module, the spiral coil is bonded to the first carrier surface through a spiral-shaped first bonding piece, the first bonding piece is formed by solidification of glue, and the shape is matched with the shape of the spiral coil.

[0013] As an optional technical scheme of the coil module, the magnetic isolation member comprises a plurality of ferrite blocks, the plurality of ferrite blocks are arranged in a matrix shape, and an insulating layer is arranged around the periphery of each ferrite block.

[0014] As an optional technical scheme of the coil module, the magnetic isolation member further comprises a plurality of conductive members, the conductive members are arranged on the side of the ferrite blocks away from the carrier, and the conductive members are connected in conduction between any two adjacent ferrite blocks.

[0015] As an optional technical scheme of the coil module, the conductive member is conductive foam; and / or,

[0016] The conductive member is bonded to the ferrite block.

[0017] As an optional technical scheme of the coil module, the coil module further comprises a second bonding member, and the magnetic isolation member and the second carrier surface are bonded through the second bonding member.

[0018] As an optional technical scheme of the coil module, the coil body further comprises a terminal, and the terminal is arranged at the end of the wire.

[0019] As an optional technical scheme of the coil module, the coil body further comprises a heat shrink tube, and the heat shrink tube is sleeved on the part of the wire close to the terminal; and / or,

[0020] The coil body further comprises a sheath, and the sheath is sleeved on the outside of the terminal.

[0021] As an optional technical scheme of the coil module, the turns in the spiral coil are arranged at intervals.

[0022] The coil module has at least the following beneficial effects:

[0023] The coil module comprises a carrier, a coil body and a magnetic isolation member, wherein the carrier is a plate-shaped structure and has a first carrier surface and a second carrier surface, the coil body is bonded to the first carrier surface through a first bonding member, and the magnetic isolation member is arranged on the second carrier surface and is used for isolating the magnetic field generated by the coil body. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the description of the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the contents of the embodiments of the present application and these drawings without any creative effort.

[0025] Figure 1 It is a structure schematic view of the coil module from a first perspective in the embodiments of the present application.

[0026] Figure 2 It is a structure schematic view of the coil module from a second perspective in the embodiments of the present application.

[0027] Figure 3 It is a structure schematic view of the coil module from a top view in the embodiments of the present application.

[0028] Figure 4 It is Figure 3 It is a partial sectional view along the direction of A-A.

[0029] Figure 5 It is an exploded structure schematic view of the coil module in the embodiments of the present application.

[0030] In the drawings:

[0031] 100, bearing; 110, first bearing surface; 120, second bearing surface;

[0032] 200, coil body; 210, spiral coil; 220, terminal; 230, heat shrink tube; 240, sheath;

[0033] 300, magnetic isolation member; 310, ferrite; 320, conductive member;

[0034] 400, first adhesive member;

[0035] 500, second adhesive member. DETAILED DESCRIPTION

[0036] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described drawings.

[0037] In this application, the terms "include", "comprise", "have" or any other variant thereof are intended to cover a non-exclusive inclusion, such that processes, methods, articles, or apparatuses that include a series of elements are not limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0038] In this application, the term "and / or", is a description of the associated relationship between objects, which means that there can be three kinds of relationships. For example, A and / or B, can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this application generally represents a "and / or" relationship between the front and rear associated objects.

[0039] In this application, the terms "connection", "combination", "coupling", "installation" can be direct connection, combination, coupling or installation, or indirect connection, combination, coupling or installation. Among them, for example, direct connection refers to the connection of two parts or components without the need for an intermediate part, and indirect connection refers to the connection of two parts or components with at least one intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0040] In this application, the terms "up", "down", "left", "right", "front", "back" and other orientation words are described in the orientation and position relationship shown in the drawings, and should not be understood as a limitation on the embodiments of the application. In addition, it is also understood in the context that when referring to an element connected to another element "on" or "under", it can not only be directly connected to another element "on" or "under", but also indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the orientation words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the straight down, left down, right down, front down and back down, etc.

[0041] As Figures 1 to 5As shown, the embodiment provides a coil module to reduce the overall thickness and reduce the production difficulty. The coil module comprises a bearing member 100, a coil body 200 and a magnetic isolation member 300. Wherein, the bearing member 100 is a plate structure, and has a first bearing surface 110 and a second bearing surface 120 arranged oppositely; the coil body 200 is bonded to the first bearing surface 110 of the bearing member 100 by a first bonding member 400; the magnetic isolation member 300 is arranged on the second bearing surface 120 of the bearing member 100, and is used to isolate the magnetic field generated when the coil body 200 is powered. The plate structure of the bearing member 100 does not need to be provided with a groove, so that the thickness of the bearing member 100 can be appropriately reduced, thereby facilitating the reduction of the overall thickness of the coil module, and the coil body 200 is bonded to the first bearing surface 110 by the first bonding member 400, which can ensure the connection strength; in addition, the bearing member 100 without the groove structure is convenient to produce, and reduces the production difficulty.

[0042] In order to further reduce the production difficulty of the bearing member 100, in some embodiments, the first bearing surface 110 and the second bearing surface 120 are both flat surfaces and are arranged in parallel. The bearing member 100 is made of FR-4, plastic or other insulating materials. The thickness of the bearing member 100 is 0.5mm-2mm. For example, the thickness of the bearing member 100 is 0.6mm, 0.7mm, 1mm or 1.5mm. In other embodiments, the thickness of the bearing member 100 can also be 2.5mm.

[0043] Regarding the production of the bearing member 100, it can be injection molded or cut molded. In the embodiment, the cut molding is taken as an example to be briefly described, a plate material larger than the size of the bearing member 100 is prepared first, and then the bearing member 100 with a set size is prepared by cutting process.

[0044] In some embodiments, referring to Figure 4 and Figure 5 As shown, the coil body 200 comprises a spiral coil 210 wound by a wire, the first bonding member 400 is spiral-shaped and is adapted to the shape of the spiral coil 210, and the first bonding member 400 is formed by solidification of glue. Wherein, the glue dispensing process can be performed on the bearing member 100 according to the path of the spiral coil 210 by a glue dispenser, after the glue dispensing is completed, the spiral coil 210 is placed on the glue, and then the pressure holding and standing process is performed. The spiral-shaped first bonding member 400 can effectively complete the bonding between the spiral coil 210 and the bearing member 100; in addition, it is also helpful to save glue.

[0045] The coil body 200 needs to be connected with an external circuit. In some embodiments, the coil body 200 includes terminals 220 and a spiral coil 210 wound by a wire, the spiral coil 210 is bonded to the first bearing surface 110, and the terminals 220 are riveted to the ends of the wire for connecting the external circuit. Specifically, two terminals 220 are provided, and one terminal 220 is installed at each end of the wire. The terminal 220 is in a disc structure. A connecting hole is formed in the middle of the terminal 220 to facilitate the passage of a bolt or the external circuit, thereby ensuring the stable connection of the wire and the external circuit.

[0046] To meet the charging demand, the diameter of the wire can be 5 mm. Since the current in the spiral coil 210 is large, the coils in the spiral coil 210 are arranged at intervals to avoid the proximity effect of the current.

[0047] In some embodiments, the coil body 200 further includes a heat shrink tube 230, which is sleeved on the part of the wire close to the terminal 220. The heat shrink tube 230 effectively protects the wire outside the bearing 100, avoiding short circuit and other problems. The wire can be a silk-covered wire.

[0048] The coil body 200 further includes a protective sleeve 240 of insulating material, which is sleeved outside the terminal 220 to protect the terminal 220 from short circuit, moisture and other problems. Specifically, the external circuit enters the protective sleeve 240 through the opening of the protective sleeve 240 and is connected with the terminal 220.

[0049] To avoid the generation of electromagnetic eddy current effect and reduce the amount of heat generated, in some embodiments, as shown in Figure 3 The magnetic isolation member 300 includes a plurality of ferrite blocks 310 arranged in a matrix, and each ferrite block 310 is surrounded by an insulating layer on the side. The insulating layer is a PI material insulating tape. The thickness of the insulating tape is small, so that the gap between the two adjacent ferrite blocks 310 is small, which helps to ensure the shielding effect of the magnetic isolation member 300. In this embodiment, the ferrite block 310 is 16, arranged in a 4x4 matrix. In other embodiments, the number of ferrite blocks 310 and the arrangement mode can be reasonably set according to the specific structure of the spiral coil 210.

[0050] The coil module further includes a second bonding member 500 for bonding each ferrite block 310 and the second bearing surface 120. Bonding the ferrite block 310 and the bearing 100 simplifies the connection mode and ensures the connection strength between them. The second bonding member 500 is a sheet-shaped pressure-sensitive adhesive, a hot melt adhesive tape, or other adhesives that can achieve the same bonding function, which is not limited here. In other embodiments, the second bonding member 500 can also be grid-shaped and formed by glue solidification.

[0051] In order to avoid the problem of tip discharge between the ferrite 310 at the sharp corner under extreme conditions, the magnetic isolation member 300 further comprises a plurality of conductive members 320, which are arranged on the side of the ferrite 310 away from the bearing member 100, and each of the two adjacent ferrite 310 is connected with the conductive member 320. Specifically, the conductive member 320 is a conductive foam, a conductive copper foil or other thin sheet that can realize the function of conducting electricity, which is not limited here. In order to improve the assembly efficiency, in some embodiments, the conductive member 320 is bonded to the ferrite 310.

[0052] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not the limitation of the embodiments of the utility model. For ordinary skilled in the art, various obvious changes, re-adjustment and replacement can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to enumerate all the embodiments. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. Coil module, characterized in that The coil module comprises: a carrier (100) having a first carrier surface (110) and a second carrier surface (120) arranged oppositely; a coil body (200) comprising a spiral coil (210) wound by a wire, the spiral coil (210) being bonded to the first carrier surface (110) of the carrier (100); a magnetic isolation member (300) arranged on the second carrier surface (120) of the carrier (100).

2. The coil module of claim 1, wherein, The first carrier surface (110) and the second carrier surface (120) are both planar; and / or The thickness of the carrier (100) is 0.5-2 mm.

3. The coil module of claim 1, wherein, The spiral coil (210) is bonded to the first carrier surface (110) by a spiral-shaped first bonding member (400) formed by solidification of glue and having a shape matching that of the spiral coil (210).

4. The coil module according to any one of claims 1 to 3, characterized in that The magnetic isolation member (300) comprises a plurality of ferrite blocks (310) arranged in a matrix, and each ferrite block (310) is surrounded by an insulating layer on its periphery.

5. The coil module of claim 4, wherein, The magnetic isolation member (300) further comprises a plurality of conductive members (320) arranged on the side of the ferrite blocks (310) away from the carrier (100), and the conductive members (320) are connected in conductive manner between any two adjacent ferrite blocks (310).

6. The coil module of claim 5, wherein, The conductive members (320) are conductive foam; and / or The conductive members (320) are bonded to the ferrite blocks (310).

7. The coil module of claim 4, wherein, The coil module further comprises a second bonding member (500) bonding each ferrite block (310) to the second carrier surface (120).

8. The coil module of claim 1, wherein, The coil body (200) further comprises a terminal (220) provided at the end of the wire.

9. The coil module of claim 8, wherein, The coil body (200) further comprises a heat-shrinkable tube (230) sleeved on the portion of the wire close to the terminal (220); and / or The coil body (200) further comprises a sheath (240) sleeved on the outside of the terminal (220).

10. The coil module of claim 8, wherein, Each coil in the spiral coil (210) is arranged at intervals.

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