阅读说明：本技术 无线充电接收装置 (Wireless charging receiving device ) 是由 徐喜红 宋磊 于 2019-10-08 设计创作，主要内容包括：本发明提供一种无线充电接收装置,其包括:第一PCBA、第二PCBA、水道板、磁性材料、线圈、线圈托盘。本发明中,水道板在提供散热功能的同时,还设置有第一容置腔,第一容置腔的第二腔体相对第一腔体下沉式设计,如此有利于充分利用空间的间隙布置PCBA,实现了整体的减薄设计。同时,水道板的第二容置腔与第二腔体错位布置,有利于线圈和磁性材料的合理布置。此外,形成水道的凸台还方便了压铆螺母和mos器件的安装；通过对第一PCBA、第二PCBA、电感器件、多个MOS器件的布局进行优化设计,有利于实现整体的减薄,方便了无线充电接收装置在电动汽车上的安装固定。(The invention provides a wireless charging receiving device which comprises a first PCBA, a second PCBA, a water channel plate, a magnetic material, a coil and a coil tray. According to the invention, the water channel plate is provided with the first accommodating cavity while providing a heat dissipation function, and the second cavity of the first accommodating cavity is designed in a sinking manner relative to the first cavity, so that the PCBA can be arranged in a gap manner by fully utilizing the space, and the integral thinning design is realized. Meanwhile, the second accommodating cavity and the second cavity of the water channel plate are arranged in a staggered mode, and the coils and the magnetic materials are favorably and reasonably arranged. In addition, the bosses forming the water channels facilitate the installation of the rivet pressing nuts and mos devices; through carrying out optimal design to the overall arrangement of first PCBA, second PCBA, inductance device, a plurality of MOS device, be favorable to realizing holistic attenuate, made things convenient for wireless charging receiving arrangement to fix the installation on electric automobile.)

1. A wireless charging receiving device is characterized by comprising a first PCBA, a second PCBA, a water channel plate, a magnetic material, a coil and a coil tray;

the waterway plate comprises: the plate comprises a plate body, wherein one surface of the plate body forms a first accommodating cavity, the other surface of the plate body forms a second accommodating cavity, the bottom of the first accommodating cavity is provided with a step structure, the step structure divides the first accommodating cavity into a first cavity and a second cavity, and the second accommodating cavity is arranged corresponding to the first cavity and is arranged in a staggered manner with the second cavity;

the second PCBA is accommodated and installed in the second cavity, the first PCBA extends from the first cavity to the upper side of the second PCBA, and electronic devices on the first PCBA and electronic devices on the second PCBA are arranged in a staggered mode;

One surface of the coil tray is provided with a wire casing for accommodating the coil, the magnetic material and the coil tray are accommodated and installed in the second accommodating cavity from top to bottom, and the surface of the coil tray is flush with one surface of the water channel plate or is lower than the surface of the water channel plate.

2. the wireless charge receiving device according to claim 1, wherein the water channel inside the plate body is a boss extending from a bottom surface of the plate body, the boss is U-shaped, one end of the U-shaped boss is communicated with a water inlet port, the other end of the U-shaped boss is communicated with a water outlet port, and the first cavity and the second cavity are defined by the U-shaped boss.

3. the wireless charge receiving arrangement of claim 1, further comprising: a cover plate, the first and second PCBAs being arranged in a stack in a gap between the waterway plate and the cover plate.

4. The wireless charge receiving arrangement of claim 1, further comprising: a plurality of MOS devices;

The plurality of MOS devices are arranged between the first PCBA and the second PCBA, the plurality of MOS devices are distributed on two sides of the second PCBA, partial MOS devices in the plurality of MOS devices on any side are respectively electrically connected with the second PCBA, and other MOS devices are respectively electrically connected with the first PCBA, arranged in a first direction and arranged in a second direction.

5. The wireless charge receiving device of claim 4, wherein the MOS devices on both sides of the second PCBA are symmetrically or asymmetrically arranged.

6. the wireless charge receiving device of claim 4, wherein the first direction and the second direction are opposite directions.

7. the wireless charge receiving device of claim 4, wherein the water channel inside the plate body is a boss extending from the bottom surface of the plate body, the boss is U-shaped, one end of the U-shaped boss is communicated with a water inlet port, the other end of the U-shaped boss is communicated with a water outlet port, the first cavity and the second cavity are defined by the U-shaped boss, and the MOS devices are distributed on the top surface of the water channel on two sides of the second PCBA.

8. The wireless charge receiving device of claim 1, wherein two sides of a first PCBA located above a second PCBA extend beyond the second PCBA, an inductive device is located below either side of the first PCBA that extends beyond, the inductive device and the second PCBA are located on the same side of the first PCBA, and the inductive device is directly connected to the first PCBA through a clinch nut.

9. The wireless charge receiving device according to claim 8, wherein the water channel inside the plate body is a boss extending from the bottom surface of the plate body, the boss is U-shaped, one end of the U-shaped boss is communicated with the water inlet port, the other end of the U-shaped boss is communicated with the water outlet port, the first cavity and the second cavity are defined by the U-shaped boss, a third cavity is further defined between the boss defining the second cavity and the side wall of the water channel plate, and the inductance devices are respectively contained in the third cavities.

10. the wireless charging receiving device according to claim 1, wherein an upper tray is disposed above the magnetic material of the wireless charging receiving device, a lower tray is disposed below the magnetic material of the wireless charging receiving device, and the upper tray, the magnetic material, the lower tray and the coil tray are sequentially disposed in the second accommodating cavity.

Technical Field

the invention relates to the technical field of wireless charging, in particular to a wireless charging receiving device.

background

In a high-power wireless charging system of a new energy automobile, a receiving device is installed at a new energy automobile chassis position, and due to the limitation of the new energy automobile chassis space, the receiving device needs to keep a specified distance from a ground transmitting device, so that the height and the size of a receiving end device need to be strictly controlled by the new energy automobile. Most of the height dimensions of the existing wireless charging receiving device are more than 55 mm, the thinnest is 45 mm, and under the condition of considering both the length dimension and the weight, the existing wireless charging receiving device has no thinner design, so that the installation requirements of many new energy automobiles are difficult to meet. The rapid development and mass production of new energy wireless charging automobiles are seriously hindered, and the progress of mass production of wireless charging equipment is also hindered. Therefore, it is necessary to provide a further solution to the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a wireless charging receiving device to overcome the defects in the prior art.

In order to solve the technical problems, the technical scheme of the invention is as follows:

A wireless charging receiving device comprises a first PCBA, a second PCBA, a water channel plate, a magnetic material, a coil and a coil tray;

The waterway plate comprises: the plate comprises a plate body, wherein one surface of the plate body forms a first accommodating cavity, the other surface of the plate body forms a second accommodating cavity, the bottom of the first accommodating cavity is provided with a step structure, the step structure divides the first accommodating cavity into a first cavity and a second cavity, and the second accommodating cavity is arranged corresponding to the first cavity and is arranged in a staggered manner with the second cavity;

The second PCBA is accommodated and installed in the second cavity, the first PCBA extends from the first cavity to the upper side of the second PCBA, and electronic devices on the first PCBA and electronic devices on the second PCBA are arranged in a staggered mode;

One surface of the coil tray is provided with a wire casing for accommodating the coil, the magnetic material and the coil tray are accommodated and installed in the second accommodating cavity from top to bottom, and the surface of the coil tray is flush with one surface of the water channel plate or is lower than the surface of the water channel plate.

as an improvement of the wireless charging receiving device, the water channel in the plate body is a boss extending out of the bottom surface of the plate body, the boss is U-shaped, one end of the U-shaped boss is communicated with a water inlet water channel opening, the other end of the U-shaped boss is communicated with a water outlet water channel opening, and the first cavity and the second cavity are limited by the U-shaped boss.

As an improvement of the wireless charge receiving apparatus of the present invention, the wireless charge receiving apparatus further comprises: a cover plate, the first and second PCBAs being arranged in a stack in a gap between the waterway plate and the cover plate.

As an improvement of the wireless charge receiving apparatus of the present invention, the wireless charge receiving apparatus further comprises: a plurality of MOS devices;

The plurality of MOS devices are arranged between the first PCBA and the second PCBA, the plurality of MOS devices are distributed on two sides of the second PCBA, partial MOS devices in the plurality of MOS devices on any side are respectively electrically connected with the second PCBA, and other MOS devices are respectively electrically connected with the first PCBA, arranged in a first direction and arranged in a second direction.

as an improvement of the wireless charging receiving apparatus of the present invention, the MOS devices on both sides of the second PCBA are maintained in a symmetrical arrangement or an asymmetrical arrangement.

As an improvement of the wireless charge receiving apparatus of the present invention, the first direction and the second direction are opposite directions.

The wireless charging receiving device is improved in that the water channel in the plate body is a boss extending out of the bottom surface of the plate body, the boss is U-shaped, one end of the U-shaped boss is communicated with a water inlet water channel opening, the other end of the U-shaped boss is communicated with a water outlet water channel opening, the first cavity and the second cavity are limited by the U-shaped boss, and the MOS devices are distributed on the top surfaces of the water channels on the two sides of the second PCBA.

As an improvement of the wireless charging receiving device of the invention, two sides of the first PCBA located above the second PCBA are arranged beyond the second PCBA, an inductance device is arranged below any one side beyond the first PCBA, the inductance device and the second PCBA are located on the same side of the first PCBA, and the inductance device is directly connected with the first PCBA through a rivet nut.

The wireless charging receiving device is improved in that the water channel in the plate body is a boss extending out of the bottom surface of the plate body, the boss is U-shaped, one end of the U-shaped boss is communicated with a water inlet port, the other end of the U-shaped boss is communicated with a water outlet port, the first cavity and the second cavity are limited by the U-shaped boss, a third cavity is further limited between the boss limiting the second cavity and the side wall of the water channel plate, and the inductance devices are respectively contained in the third cavity.

as an improvement of the wireless charging receiving device, an upper tray is arranged above the magnetic material of the wireless charging receiving device, a lower tray is arranged below the magnetic material of the wireless charging receiving device, and the upper tray, the magnetic material, the lower tray and the coil tray are sequentially arranged in the second accommodating cavity.

Compared with the prior art, the invention has the beneficial effects that:

1. The water channel plate is provided with a first accommodating cavity while providing a heat dissipation function, and the second cavity of the first accommodating cavity is designed in a sunken mode relative to the first cavity, so that the gap arrangement PCBA in the space is favorably fully utilized, and the integral thinning design is realized. Meanwhile, the second accommodating cavity and the second cavity of the water channel plate are arranged in a staggered mode, and the coils and the magnetic materials are favorably and reasonably arranged. In addition, the bosses forming the water channels facilitate the installation of the rivet pressing nuts and mos devices;

2. The layout of the first PCBA and the second PCBA is optimally designed, so that the integral thinning is facilitated, and the wireless charging receiving device is convenient to mount and fix on the electric automobile;

3. The installation mode of the inductance device and the MOS devices is optimized, so that the integral thinning is favorably realized, and the wireless charging receiving device is convenient to install and fix on the electric automobile.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a wireless charge receiving device according to an embodiment of the present invention;

fig. 2 is an exploded perspective view of the wireless charging receiving apparatus according to an embodiment of the present invention;

fig. 3 is an enlarged perspective view of an embodiment of a water channel plate in the wireless charging receiving device according to the present invention;

fig. 4 is an enlarged perspective view of the first PCBA, the second PCBA, and the water channel plate in the wireless charging receiving device of the present invention;

Fig. 5 is a schematic perspective view of a first PCBA, a second PCBA, a plurality of MOS devices, and a water channel plate in the wireless charging receiving apparatus of the present invention;

Fig. 6 is a schematic perspective view of a first PCBA, a second PCBA, an inductor, and a water channel plate in the wireless charging receiver of the present invention;

Fig. 7 is an enlarged perspective view of a water channel plate, a coil and a coil tray in the wireless charging receiving device of the present invention;

Fig. 8 is an enlarged perspective view of the buckle of the wireless charging receiver of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, the wireless charge receiving apparatus of the present invention includes: the water channel comprises a shell 1, a cover plate 2, a first PCBA 3, a second PCBA 4, a water channel plate 5, a magnetic material 6, a coil 7 and a coil tray 8.

As shown in fig. 3, the water passage plate 5 includes: a plate body 51. The plate 51 may be made of an aluminum alloy.

A water passage 511 is provided in the plate body 51, and the water passage 511 extends from one end to the other end of the plate body 51 in both the longitudinal direction and the width direction. The opening of the water passage 511 is disposed at one end of the plate body 51. Therefore, the external refrigerant flows into the water passage 511 from one water passage, takes heat away by heat exchange, and flows out from the other water passage.

In one embodiment, the water passage 511 is a boss protruding from the bottom surface of the plate body 51, and the boss is hollow to form the water passage 511. The boss is U-shaped, and the one end of U-shaped boss communicates the water inlet's water road junction, and the other end communicates the water road junction of going out water.

The plate body 51 has a first receiving chamber 512 formed on one surface thereof and a second receiving chamber 513 formed on the other surface thereof. The first accommodating chamber 512 is used for realizing the stacked arrangement of the two PCBAs 3 and 4, and the second accommodating chamber 513 is used for realizing the stacked arrangement of the coil 7 and the magnetic material 6, so as to realize the thinning design.

A step structure 5121 is disposed at the bottom of the first accommodating cavity 512, and the step structure 5121 divides the first accommodating cavity 512 into a first cavity 51211 and a second cavity 51212. The first cavity 51211 is used for mounting and fixing the first PCBA 3, and the second cavity 51212 is used for mounting and fixing the second PCBA 4. Correspondingly, the bottom surfaces of the first cavity 51211 and the second cavity 51212 are further provided with protruding locking screw holes 52123, and the PCBAs 3 and 4 are fixed in the corresponding locking screw holes 52123 by screw locking. And the plate body 51 in the corresponding area is thinner due to the arrangement of the cavity, and the protruding locking screw 52123 is beneficial to the realization of the fastening connection of the screw.

In conjunction with the above-described channel 511 design of the U-shaped boss, the first and second cavities 51211 and 51212 are defined by the U-shaped boss. A third cavity 51213 is also defined between the boss defining the second cavity 51212 and the side wall of the waterway plate 5, and the third cavity 51213 can be used for receiving and mounting the clinch nut 13 connected to the PCBA. Further, the top surface of the boss defining the second cavity 51212 also forms a mounting surface 5111, and the mounting surface 5111 can be used as a mounting surface for a heat generating device such as a mos device.

the cover plate is buckled on the water channel plate 5 to realize the sealing of the interior of the water channel plate 5. In order to achieve a good seal between the water passage plate 5 and the cover plate 2, an assembly groove 514 suitable for installing the sealing rubber strip 9 is further provided on the end surface of the top of the side wall of the water passage plate 5. The shell 1 is buckled on the cover plate and the water channel plate 5 which are assembled together, the outer wall surface of the side wall of the water channel plate 5 is correspondingly provided with a connecting lug 515 provided with a through hole, and the shell 1 is locked on the connecting lug 515 through a screw.

the second accommodating chamber 513 is arranged corresponding to the first chamber 51211, and is arranged in a staggered manner with the second chamber 51212, so that the reasonable arrangement of the coil 7 and the magnetic material 6 is facilitated, and the integral thinning is realized.

as shown in fig. 4, the water channel plate 5 provides a heat dissipation function, and at the same time, it also assists the first PCBA 3 and the second PCBA 4 to be installed and fixed, so as to realize the optimized arrangement of the layout of the two.

Specifically, the second PCBA 4 is received mounted in the second cavity 51212, and the first PCBA 3 extends from the first cavity 51211 to above the second PCBA 4. By arranging the step structure 5121, the vertical space occupied by the water channel plate 5 is fully utilized, so that the first PCBA 3 and the second PCBA 4 are thinned when being stacked.

The first PCBA 3 and the second PCBA 4 are lockingly attached by a connector 31. In one embodiment, the above-mentioned connecting members 31 are arranged at four corners of the second PCBA 4. Further, the connecting member, when locked to connect, extends through the second PCBA 4 and locks into a corresponding threaded hole in the bottom of the waterway plate 5 on one side of the stepped structure 5121.

The wireless charging receiving device further comprises an electrical connector 10, wherein the electrical connector 10 is installed at one end of the water channel plate 5 and is electrically connected with the second PCBA 4. Correspondingly, one end of the water channel plate 5 is provided with a hollow structure for installing the electrical connector 10.

In order to fully utilize the space gap of the wireless charging receiving device, the first PCBA 3 and the second PCBA 4 are arranged in a stacked manner in the gap between the water channel plate 5 and the cover plate 2. Meanwhile, the electronic devices on the first PCBA 3 and the electronic devices on the second PCBA 4 are maintained in a staggered arrangement.

To achieve a thinned design, the dimensions of the structures themselves and the spacing between structures should be tightly controlled.

In one embodiment, the waterway plate 5 and the first PCBA 3 and the second PCBA 4 should satisfy the following dimensional relationship: the wall thickness of the bottom of the water channel plate 5 on the other side of the step structure 5121 is 3mm, the distance between the bottom of the water channel plate 5 and the first PCBA 3 is 7.5mm, and the thickness of the first PCBA 3 is 2 mm; the wall thickness of the bottom of the water channel plate 5 on one side of the step structure 5121 is at least 3mm, the distance between the bottom of the water channel plate 5 and the second PCBA 4 is 6mm, and the thickness of the second PCBA 4 is 2 mm. Wherein, when considering the attenuate design, set up the wall thickness of raceway board 5 bottom and be 3mm, be in order to guarantee its intensity requirement.

In another embodiment, the cover plate 2 and the first PCBA 3 should satisfy the following dimensional relationship: the interval between first PCBA 3 and the apron 2 is 3.5mm, and apron 2 thickness is 2.5 mm.

In another embodiment, the following dimensional relationship should be satisfied between the first PCBA 3 and the second PCBA 4: the spacing between the first PCBA 3 and the second PCBA 4 is 16 mm.

As shown in fig. 5, the wireless charge receiving apparatus further includes: a plurality of MOS devices 11. The plurality of MOS devices 11 are arranged between the first PCBA 3 and the second PCBA 4. In this way, the increase in the dimension in the height direction is avoided by making full use of the gap between the first PCBA 3 and the second PCBA 4.

Specifically, the plurality of MOS devices 11 are distributed on two sides of the second PCBA 4, and the MOS devices 11 on two sides of the second PCBA 4 are symmetrically or asymmetrically arranged, and may be symmetrically or asymmetrically arranged according to actual arrangement requirements.

For a plurality of MOS devices 11 on any side, some of the MOS devices 111 are electrically connected to the second PCBA 4, the rest of the MOS devices 112 are electrically connected to the first PCBA 3, the MOS devices 112 electrically connected to the second PCBA 4 are arranged in a first direction, the MOS devices 111 electrically connected to the first PCBA 3 are arranged in a second direction, and a reasonable distance is maintained between the MOS devices 11. So, through adopting above-mentioned mounting means, be favorable to the space between the make full use of PCBA to realize the attenuate design.

In one embodiment, the first direction and the second direction are opposite directions. At this time, the MOS devices 11 are mounted and fixed in a flip-chip manner with a positive gap and a negative gap therebetween so as to avoid interference between the MOS devices 11.

For the MOS devices 11 on either side, the pins of the MOS devices 11 connected with the second PCBA 4 are extended along the first direction and then vertically connected with the second PCBA 4, and the pins of the MOS devices 11 connected with the first PCBA 3 are extended along the second direction and then vertically connected with the first PCBA 3. In this manner, each MOS device 11 is electrically connected to the corresponding PCBA.

In one embodiment, several MOS devices 11 on either side may be arranged as follows: the MOS devices 11 connected to the second PCBA 4 are arranged side by side on a side close to the second PCBA 4, and the MOS devices 11 connected to the first PCBA 3 are arranged side by side on a side remote from the second PCBA 4. Wherein, the number of the MOS devices 11 near one side of the second PCBA 4 may be four; the number of MOS devices 11 on the side remote from the second PCBA 4 may be two.

As described above, the waterway plate 5 has the water passage 511 which is hollow inside in the U-shape and is protrudingly provided on the surface of the waterway plate 5. At this time, the second PCBA 4 is accommodated and mounted in a space surrounded by the U-shaped water passage 511, and the plurality of MOS devices 11 are distributed on the mounting surface 5111 of the water passage 511 on both sides of the second PCBA 4.

As shown in fig. 6, the wireless charge receiving apparatus further includes: an inductive device 12.

The first PCBA 3 with the range upon range of setting of second PCBA 4, just first PCBA 3 with have the interval between the second PCBA 4, lie in the both sides of the first PCBA 3 of second PCBA 4 top surpass the setting of second PCBA 4, the below of either side that first PCBA 3 surpassed is provided with inductance component 12, inductance component 12 with the second PCBA 4 lies in same one side of first PCBA 3. In this way, the overall thickness of the layout structure of the inductor device 12 is sufficiently controlled, and the increase in the dimension in the height direction is avoided. Meanwhile, as for the height of the inductance device 12, it should be required that the height of the inductance device 12 is at most 22mm, preferably 18 mm.

Meanwhile, the invention also optimizes the connection mode between the inductance device 12 and the first PCBA 3. Specifically, inductance device 12 through the pressure rivet nut 13 with first PCBA 3 directly connects, so saved cable and PCBA solder terminal, improved the utilization ratio in space greatly, be favorable to reducing inductance device 12's overall arrangement structure's height.

In one embodiment, one end of the pressure rivet nut 13 is fixed on the first PCBA 3, and the other end is provided with a screw hole. The pressure riveting nut 13 and the first PCBA 3 are directly locked and attached through a screw, and correspondingly, a through hole for the screw to pass through is formed in the first PCBA 3, so that the screw passes through the through hole and is locked and attached in the pressure riveting nut 13, and the connection between the first PCBA 3 and the inductance device 12 is realized.

Further, in order to ensure a firm connection, both ends of any inductive device 12 are directly connected with the first PCBA 3 through the press-riveting nut 13. Wherein one end of any inductive device 12 is directly connected with the first PCBA 3 through at least one clinch nut 13. In this case, it is preferable that one end of any one of the inductance devices 12 is directly connected to the first PCBA 3 by two clinch nuts 13.

In order to realize reasonable layout, the inductive devices 12 on both sides are left-right symmetrically arranged.

As described above, the water channel plate 5 has the water channel 511 which is hollow inside and protrudes from the surface of the water channel plate 5, and the two sides of the water channel 511 are spaced from the opposite side walls of the water channel plate 5. At this time, the inductance device 12 is accommodated in the third cavity 51213 between both sides of the water passage 511 and the side wall of the water passage plate 5.

As shown in fig. 7 and 8, the coil 7 is used for forming electromagnetic induction with the wireless charging transmitting device in the wireless charging process. The coil 7 is formed by winding in a spiral form from inside to outside or from outside to inside, and both ends of the coil 7 form terminals. The coil 7 is installed on the coil tray 8, the coil tray 8 is embedded in the second accommodating chamber 513 of the water channel plate 5, and the terminal of the coil 7 is connected with the first PCBA plate 3.

The terminal of the coil 7 is connected with the PCBA board in a mode of connection through a buckle 71. The benefit that so sets up lies in, compares among the prior art, with the wiring end and a copper terminal welded connection of coil 7, passes through the mode on the screw fixation in the PCBA board with the copper terminal again, both can realize the attenuate design, has improved the intensity of connecting again. Specifically, the through holes through which the wiring terminals pass are formed in the water channel plate 5 and the magnetic material 6, the buckle 71 is fixed at the position, required to be connected with the wiring terminals, on the PCBA plate, a clamping groove 711 is formed in the buckle 71, and a plurality of protrusions 712 capable of being clamped with the wiring terminals are arranged in the clamping groove 711. The protrusion 712 may be a screw protrusion continuously formed inside the card slot. When connected, the terminals may snap into the slots 711 and form an interference fit with the protrusions 712.

The coil tray 8 is used for fixing the coil 7, correspondingly, a wire slot 81 is formed in one surface of the coil tray 8, the wire slot 81 is extended according to the shape of the coil 7, and the coil 7 is preferably arranged in the wire slot 81 in a manner of being completely accommodated. To achieve a thinned design, it should be required for the thickness of the coil tray 8 to be at most 3 mm. Because, in terms of process, when the thickness of the coil tray 8 is greater than 3mm, a problem of shrinkage deformation is likely to occur during injection molding of the coil tray 8.

in order to realize the encapsulation of the coil 7, the peripheral edge of the coil tray 8 is provided with a side wall 82, and the coil 7 is encapsulated in a cavity enclosed by the coil tray 8 and the side wall 82 thereof. Meanwhile, in order to ensure the sealing performance, a groove 821 for placing the sealing rubber strip 9 is further provided on the end surface of the side wall 82. When the coil tray 8 is assembled on the waterway plate 5, the gap therebetween is closed by the joint sealant 9.

The water channel plate 5 mainly functions to dissipate heat, a plurality of water channels 511 are formed in the water channel plate, and a refrigerant enters the water channels 511 to take away heat generated by the wireless charging receiver during operation.

In order to achieve a reduced design, it has a second receiving chamber 513 for the insertion mounting of the coil tray 8. At this time, the coil tray 8 is embedded in the second accommodating chamber 513, and the surface of the coil tray 8 is flush with one surface of the water channel plate 5, or is lower than the surface of the water channel plate 5. Therefore, the coil tray 8 is prevented from protruding out of the water channel plate 5, and the overall thickness of the module is increased. Meanwhile, in order to limit the coil tray 8, a limit step 83 capable of abutting against the water channel plate 5 is further disposed at an edge of one side of the coil tray 8.

The coil tray 8 and the water passage plate 5 are locked and fixed by a connecting member (not shown). Correspondingly, the coil tray 8 is provided with mounting holes, and screws are used as connecting pieces which penetrate through the mounting holes to lock the coil tray 8 to the water channel plate 5. When the limiting step 83 is formed at one side edge of the coil tray 8, the mounting hole 831 is preferably formed on the limiting step 83, so that the coil tray 8 and the water passage plate 5 can be assembled using a short screw.

The magnetic material 6 and the coil tray 8 are accommodated and mounted in the second accommodating chamber 513 from top to bottom. Wherein, the magnetic material 6 is formed by arranging a plurality of ferrite blocks in an array mode. In order to facilitate the installation of the magnetic material 6, at this time, an upper tray 61 is disposed above the magnetic material 6 of the wireless charging receiving device, a lower tray 62 is disposed below the magnetic material 6, and the upper tray 61, the magnetic material 6, the lower tray 62, and the coil tray 8 are sequentially disposed in the second receiving chamber 513. Accordingly, the lower tray 62 is provided with partitions such that the plurality of ferrites are arranged in an array.

Preferably, the lower tray 62 has a thickness of 1.5 mm. Meanwhile, the thickness of any ferrite is 5 mm. Wherein, 5 mm's data are more crucial because through testing different thickness ferrites, the anti saturation condition under the same operating mode. For example, for ferrite with a thickness of 3mm, when the ferrite is loaded to 11kW, a region with dense magnetic field distribution can generate heat locally and violently, while for ferrite with a thickness of 5mm, the problem is not solved, and the operating condition requirement can be met. Further, the gap between the magnetic material 6 and the water passage plate 5 was maintained at 2.24 mm. The data of 2.24mm is more critical, because in order to ensure that the efficiency between the coils 7 meets the efficiency requirement of the system on the coils 7 under all offset states, the Q value of the coil receiving 7 is required to be more than 500, and the Q value is influenced by the distance between the water channel plate 5 and the ferrite; through simulation, the distance of 2.24mm can meet the requirement of wireless charging performance by the design of the coil 7 and the adjustment of the resonant capacitor.

In conclusion, 1, the water channel plate is provided with the first accommodating cavity while providing the heat dissipation function, and the second cavity of the first accommodating cavity is designed in a sinking mode relative to the first cavity, so that the gap arrangement PCBA in the space is favorably fully utilized, and the integral thinning design is realized. Meanwhile, the second accommodating cavity and the second cavity of the water channel plate are arranged in a staggered mode, and the coils and the magnetic materials are favorably and reasonably arranged. In addition, the bosses forming the water channels facilitate the installation of the rivet pressing nuts and mos devices; 2. the layout of the first PCBA and the second PCBA is optimally designed, so that the integral thinning is facilitated, and the wireless charging receiving device is convenient to mount and fix on the electric automobile; 3. the installation mode of the inductance device and the MOS devices is optimized, so that the integral thinning is favorably realized, and the wireless charging receiving device is convenient to install and fix on the electric automobile.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.