Battery antenna integrated device and electronic tag

Abstract

The utility model discloses a battery antenna integrated device and an electronic tag. The battery antenna integrated device includes: a circuit board; the solar cell is fixed on one side of the circuit board; the metal layer is arranged on the other side of the circuit board, and the metal layer comprises a grounding structure and an antenna structure which are coupled; along the thickness direction of the cell antenna integrated device, the orthographic projection of the grounding structure and the orthographic projection of the solar cell are at least partially overlapped. According to the utility model, the process complexity of the electronic tag can be reduced, and the size of the electronic tag is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic tag technical field especially relates to a battery antenna integrated device, electronic tag. BACKGROUND

[0002] The battery and the antenna need to be arranged in the active or semi-active radio frequency identification label, and the battery and the antenna are independently made in the related art.In the composition radio frequency identification label, the antenna and the battery will be electrically connected through welding or conductive glue etc.But this mode not only has the problems of complex manufacturing process and long time consumption, but also has the problems of large size and low integration, so that the occupied space of the radio frequency identification chip is large. CONTENT OF UTILITY MODEL

[0003] The utility model provides a battery antenna integrated device, electronic tag to reduce the process complexity of electronic tag, reduce the size of electronic tag.

[0004] According to an aspect of the utility model, a battery antenna integrated device is provided, which comprises:

[0005] A circuit board;

[0006] A solar cell is fixed to one side of the circuit board;

[0007] A metal layer is arranged on the other side of the circuit board, and the metal layer comprises a coupled ground structure and an antenna structure;Along the thickness direction of the battery antenna integrated device, the orthographic projection of the ground structure at least partially overlaps with the orthographic projection of the solar cell.

[0008] Optionally, along the thickness direction of the battery antenna integrated device, the orthographic projection of the antenna structure is located outside the orthographic projection of the solar cell, and the orthographic projection of the solar cell covers the orthographic projection of the ground structure.

[0009] Optionally, the metal layer further comprises a first battery pin and a second battery pin, the first battery pin is insulated from the ground structure and the antenna structure, the second battery pin is insulated from the ground structure and the antenna structure, and the first battery pin and the second battery pin are electrically connected with the solar cell;

[0010] Along the thickness direction of the battery antenna integrated device, the orthographic projection of the first battery pin and the orthographic projection of the second battery pin are both located in the orthographic projection of the solar cell.

[0011] Optionally, along the thickness direction of the battery antenna integrated device, the orthographic projection of the outer contour of the ground structure, the first battery pin and the second battery pin coincides with the orthographic projection of the solar cell.

[0012] Optionally, the antenna structure surrounds the ground structure, or the antenna structure is arranged on one side of the ground structure.

[0013] Optionally, the battery antenna integrated device further comprises:

[0014] a radio frequency identification chip, which is attached to the side of the metal layer away from the circuit board; the radio frequency identification chip is electrically connected with the ground structure and the antenna structure; the radio frequency identification chip stores identification information of the solar cell.

[0015] Optionally, the battery antenna integrated device further comprises a battery management chip and a backup battery, the battery management chip is electrically connected with the backup battery and the solar cell, and the battery management chip is used for controlling the solar cell to charge the backup battery.

[0016] Optionally, along the thickness direction of the battery antenna integrated device, the orthographic projection of the battery management chip and the backup battery is located outside the orthographic projection of the antenna structure and outside the orthographic projection of the solar cell.

[0017] Optionally, the battery management chip and the backup battery are attached to different sides of the circuit board.

[0018] According to another aspect of the present application, an electronic tag is provided, which comprises the battery antenna integrated device as described above.

[0019] The technical scheme of the embodiment of the present application adopts the battery antenna integrated device, which comprises a circuit board; a solar cell, which is fixed on one side of the circuit board; a metal layer, which is arranged on the other side of the circuit board, and the metal layer comprises a coupled ground structure and antenna structure; along the thickness direction of the battery antenna integrated device, the orthographic projection of the ground structure and the orthographic projection of the solar cell at least partially overlap. The solar cell and the antenna structure are integrated on one device, which improves the integration of the solar cell, the antenna structure and other devices, and reduces the volume of the electronic tag. At the same time, the manufacturing process of the battery antenna integrated device is compatible with the existing integrated circuit manufacturing process, so that the process complexity of the battery antenna integrated device is also low, and the corresponding manufacturing cost is also low.

[0020] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A top view of a battery antenna integrated device provided in an embodiment of this utility model;

[0023] Figure 2 A bottom view of a battery antenna integrated device provided in an embodiment of this utility model;

[0024] Figure 3 A three-dimensional structural schematic diagram of a battery antenna integrated device provided for an embodiment of this utility model;

[0025] Figure 4 A bottom view of yet another battery antenna integrated device provided in an embodiment of this utility model;

[0026] Figure 5 A bottom view of yet another battery antenna integrated device provided in an embodiment of this utility model;

[0027] Figure 6 for Figure 1 The simulation results of the antenna S-parameters of the battery antenna integrated device are shown in the figure.

[0028] Figure 7 for Figure 1 The diagram shows a simulation of the antenna impedance of the battery antenna integrated device.

[0029] Figure 8 for Figure 1 The diagram shows the antenna gain of the battery antenna integrated device. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0031] It should be noted that the terms "first", "second", and the like in the description and claims of the utility model and the above drawings are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the utility model described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to the clearly listed steps or units, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] Figure 1 A top view of a battery antenna integrated device provided by the embodiments of the utility model, Figure 2 A bottom view of a battery antenna integrated device provided by the embodiments of the utility model, Figure 3 A perspective structural schematic view of a battery antenna integrated device provided by the embodiments of the utility model, reference Figures 1 to 3 The battery antenna integrated device comprises a circuit board 11, a solar cell 12 fixed to one side of the circuit board 11, and a metal layer 13 provided on the other side of the circuit board 11, wherein the metal layer 13 comprises a coupled grounding structure 132 and an antenna structure 131; and the orthogonal projection of the grounding structure 132 and the orthogonal projection of the solar cell 12 at least partially overlap in the thickness direction of the antenna battery integrated device.

[0033] Specifically, the battery antenna integrated device integrates an antenna and a battery, which can be applied to an electronic tag, thereby avoiding the problem that the electronic tag cannot communicate with a read-write device in a weak electromagnetic environment. The circuit board 11 is, for example, a PCB (printed circuit board), the solar cell 12 can convert solar energy into electrical energy storage, and the solar cell 12 is, for example, a solar wafer or the like, comprising a semiconductor material. The specific structure of the solar cell 12 is well known to those skilled in the art and is not limited here. The metal layer 13 comprises a grounding structure 132 and an antenna structure 131, the antenna structure 131 serves as an antenna and can radiate electromagnetic waves outwardly or receive electromagnetic waves from the outside. The grounding structure 132 provides grounding for the antenna structure 131.

[0034] In the embodiment, the solar cell 12 and the antenna structure 131 are integrated on one device, and the solar cell 12 and the antenna structure 131 are manufactured on the circuit board 11 by using an integrated circuit process. The integration degree of each device is high, so that the integration degree of other electronic devices, such as electronic tags, manufactured by the battery antenna integrated device can be improved. Meanwhile, the manufacturing process of the battery antenna integrated device includes a process of attaching the solar cell and a process of manufacturing the metal layer, and is compatible with the existing integrated circuit manufacturing process. That is, the battery antenna integrated device can be manufactured on the basis of the existing process, and the manufacturing cost is low. Moreover, since the solar cell 12 and the antenna structure 131 are integrated, the separate solar cell module and the antenna module do not need to be assembled on the electronic tag subsequently, so that the integration degree is high.

[0035] In addition, in the embodiment, the solar cell 12 and the metal layer 13 are arranged on different sides of the circuit board 11. Compared with the case that the solar cell 12 and the metal layer 13 are arranged on the same side of the circuit board 11, the space utilization rate can be improved, the volume of the battery antenna integrated device can be further reduced, and the integration degree can be improved.

[0036] In the embodiment, the metal layer 13 includes the antenna structure 131 and the grounding structure 132. In other words, the antenna structure 131 and the grounding structure 132 are located on the same layer and are integrated. When the antenna structure 131 and the grounding structure 132 are manufactured, the antenna structure 131 and the grounding structure 132 can be formed integrally, and the manufacturing difficulty and the process complexity are low. The orthographic projection of the grounding structure 132 at least partially overlaps the orthographic projection of the solar cell 12. The performance of the grounding structure 132 and the solar cell 12 does not affect each other, and the overlap of the two can greatly reduce the surface area of the battery antenna integrated device, so that the integration degree of the battery antenna integrated device can be improved.

[0037] The technical scheme of the embodiment is that the battery antenna integrated device includes a circuit board, a solar cell fixed on one side of the circuit board, and a metal layer arranged on the other side of the circuit board. The metal layer includes a coupled grounding structure and an antenna structure. The orthographic projection of the grounding structure at least partially overlaps the orthographic projection of the solar cell in the thickness direction of the battery antenna integrated device. The solar cell and the antenna structure are integrated on one device, the integration degree of the solar cell, the antenna structure, and other devices is improved, and the volume of the electronic tag is reduced. Meanwhile, the manufacturing process of the battery antenna integrated device is compatible with the existing integrated circuit manufacturing process, so that the process complexity of the battery antenna integrated device is low, and the manufacturing cost is low.

[0038] Optionally, in some embodiments, the orthographic projection of the antenna structure 131 at least partially overlaps the orthographic projection of the solar cell 12 in the thickness direction of the battery antenna integrated device.

[0039] Optionally, with reference to the foregoing Figures 1 to 3In the thickness direction of the battery antenna integrated device, the orthographic projection of the antenna structure 131 is located outside the orthographic projection of the solar cell 12, and the orthographic projection of the solar cell 12 covers the orthographic projection of the grounding structure 132.

[0040] Specifically, in the embodiment, the antenna structure 131 and the solar cell 12 do not overlap, so that the performance of the antenna structure 131 can be reduced by the solar cell 12. The grounding structure 132 is completely located in the orthographic projection of the solar cell 12, and the grounding structure 132 does not need to be arranged outside the orthographic projection of the solar cell 12, that is, the area outside the orthographic projection of the solar cell 12 (which can be understood as an antenna arrangement area) can be arranged with the antenna structure 131. When the size of the antenna structure 131 is small, the size of the antenna arrangement area is also small, which is more conducive to the miniaturization of the battery antenna integrated device. When the size of the circuit board 11 is fixed, there is a larger area on the circuit board to arrange the antenna structure, so as to facilitate the design difficulty of the antenna structure in the battery antenna integrated device, so that the battery antenna integrated device can set different antenna structures according to different communication frequency band requirements.

[0041] It should be noted that the size of the solar cell 12 and the antenna structure 131 in the battery antenna integrated device can be designed according to the application scenario and frequency band, and the embodiment does not make specific limitations. The metal layer may, for example, be copper.

[0042] Optionally, continuing to refer to Figures 1 to 3 The metal layer 13 further includes a first battery pin 133 and a second battery pin 134, the first battery pin 133 is insulated from the grounding structure 132 and the antenna structure 131, the second battery pin 134 is insulated from the grounding structure 132 and the antenna structure 131, and the first battery pin 133 and the second battery pin 134 are both electrically connected to the solar cell 12; in the thickness direction of the battery antenna integrated device, the orthographic projection of the first battery pin 133 and the orthographic projection of the second battery pin 134 are both located in the orthographic projection of the solar cell 12.

[0043] Specifically, one of the first battery pin 133 and the second battery pin 134 serves as the positive pole of the solar cell 12, and the other serves as the negative pole of the solar cell 12. The first battery pin 133 can be electrically connected with the solar cell 12 through a metalized via hole penetrating through the circuit board 11. Similarly, the second battery pin 134 can be electrically connected with the solar cell 12 through a metalized via hole. In the present embodiment, the pin of the solar cell is arranged in the metal layer 13, so that the pin of the solar cell is subsequently convenient to be electrically connected with the chip integrated on the side of the metal layer. In addition, the pin of the solar cell is arranged in the area of the solar cell, which does not occupy the space for arranging the antenna structure, so as to ensure that the antenna structure has a larger space, and thus the design difficulty of the antenna structure can be reduced. It should be noted that the first battery pin 133 and the second battery pin 134 are in the same layer as the grounding structure 132, and the first battery pin 133 and the grounding structure 132 are independently arranged to insulate them. Similarly, the second battery pin 134 and the grounding structure 132 are independently arranged to insulate them.

[0044] Optionally, with reference back to Figures 1 to 3 , along the thickness direction of the battery-antenna integrated device, the orthographic projection of the outer contour of the grounding structure 132, the first battery pin 133 and the second battery pin 134 coincides with the orthographic projection of the solar cell.

[0045] Specifically, the size of the grounding structure 132 has an important influence on the radiation performance of the antenna, and the size of the grounding structure 132 needs to be as large as possible. In the present embodiment, in the area of the metal layer 13 corresponding to the solar cell 12, except for the area where the first battery pin 133, the second battery pin 134 and the spacing area between the battery pin and the grounding structure 132 are arranged, the rest of the area is arranged as the grounding structure 132, so that the size of the grounding structure 132 is large, and the antenna structure 131 has better performance.

[0046] Optionally, in some embodiments, the antenna structure surrounds the grounding structure. For example, the antenna structure is a coil, and the grounding structure is a sheet metal, and the antenna structure is surrounded at the periphery of the grounding structure.

[0047] Optionally, in some other embodiments, as shown in Figures 1 to 3 , the antenna structure 131 is arranged on one side of the grounding structure 132.

[0048] Specifically, in the present embodiment, the antenna structure 131 is not arranged around the grounding structure 132, but is arranged on one side of the grounding structure 132. The shape of the antenna structure 131 is not a coil, and it can include a feeding part 1311 for feeding an electrical signal. The antenna structure 132 can be a planar inverted F antenna or an L antenna, etc.

[0049] Optionally, Figure 4The utility model discloses a kind of battery antenna integrated devices, including circuit board 11, solar cell 12, antenna structure 13, ground structure 132 and radio frequency identification chip 14, solar cell 12 is attached to the one side of circuit board 11, and solar cell 12 is electrically connected with antenna structure 13, and antenna structure 13 is electrically connected with ground structure 132, and radio frequency identification chip 14 is attached to the one side of solar cell 12 far from circuit board 11, and radio frequency identification chip 14 is electrically connected with antenna structure 13 and ground structure 132. Figure 4 Unlike the structure shown in Figure 2 , the battery antenna integrated device in the embodiment further comprises: a radio frequency identification chip 14 attached to the side of the metal layer 13 away from the circuit board 11; the radio frequency identification chip 14 is electrically connected with the ground structure 132 and the antenna structure 13; the radio frequency identification chip 14 stores the identification information of the solar cell.

[0050] Specifically, in the embodiment, one end of the radio frequency identification chip 14 is electrically connected with the antenna structure 131 for communication with the outside through the antenna structure 131, and the other end is electrically connected with the ground structure 132, which provides a reference ground for the radio frequency identification chip 14. In addition, the radio frequency identification chip 14 can also be electrically connected with the solar cell 12, which provides operating voltage for the radio frequency identification chip 14. In the embodiment, the radio frequency identification chip 14 stores the identification information of the solar cell 12, which is, for example, an identification code. The identification codes of different solar cells 12 are different, that is, each battery antenna integrated device in the embodiment has a unique identification code, which facilitates subsequent identification of the battery antenna integrated device.

[0051] Optionally, Figure 5 The utility model discloses a kind of battery antenna integrated devices, including circuit board 11, solar cell 12, antenna structure 13, ground structure 132 and radio frequency identification chip 14, solar cell 12 is attached to the one side of circuit board 11, and solar cell 12 is electrically connected with antenna structure 13, and antenna structure 13 is electrically connected with ground structure 132, and radio frequency identification chip 14 is attached to the one side of solar cell 12 far from circuit board 11, and radio frequency identification chip 14 is electrically connected with antenna structure 13 and ground structure 132. Figure 5 Unlike the structure shown in Figure 2 , the battery antenna integrated device in the embodiment further comprises a battery management chip 15 and a backup battery (not shown), and the battery management chip 15 is electrically connected with the backup battery and the solar cell, and the battery management chip 15 is used to control the solar cell to charge the backup battery.

[0052] Specifically, in the embodiment, the battery management chip 15 controls the solar cell to charge the backup battery, and when the backup battery is fully charged, the battery management chip 15 controls the solar cell to stop charging the backup battery. Both the solar cell 12 and the backup battery can serve as a power source to supply power to other devices of the electronic tag. When the solar cell 12 is insufficient, the backup battery can be enabled to supply power to other devices of the electronic tag, thereby prolonging the continuous working time of the electronic tag and avoiding the problem that the electronic tag cannot communicate with the read-write device due to insufficient power of the solar cell 12.

[0053] Optionally, the backup battery is, for example, a super capacitor or the like.

[0054] Optionally, as shown in Figure 5 , along the thickness direction of the battery antenna integrated device, the orthographic projection of the battery management chip and the backup battery is located outside the orthographic projection of the antenna structure and outside the orthographic projection of the solar cell.

[0055] Specifically, in this embodiment, neither the battery management chip nor the backup battery occupies space in the antenna structure and the solar cell, thus avoiding any impact on the performance of the solar cell and the antenna structure.

[0056] Optionally, such as Figure 5 As shown, the battery management chip 15 and the backup battery can be disposed in the area of ​​the metal layer 13 other than the grounding structure 132 and the antenna structure 131, thereby making the battery antenna integrated device more integrated and the overall size smaller.

[0057] Optionally, the battery management chip 15 and the backup battery are attached to different sides of the circuit board 11. For example, the battery management chip 15 is attached to the metal layer side, and the backup battery is attached to the solar cell side. Furthermore, the battery management chip 15 and the backup battery can at least partially overlap, thereby further improving the space utilization of the battery antenna integrated device and further improving the integration density of the battery antenna integrated device.

[0058] For example, Figure 6 for Figure 1 The simulation results of the antenna S-parameters of the battery antenna integrated device are shown in the figure. Figure 7 for Figure 1 The diagram shows a simulation of the antenna impedance of the battery antenna integrated device. Figure 8 for Figure 1 The diagram shows the antenna gain of the battery antenna integrated device. From... Figures 6 to 8 It can be concluded that the battery antenna integrated device in this embodiment has a wide frequency band, low impedance Z, and good directivity. It should be noted that... Figure 7 In the graph, curve Re represents the real part of the gain, and curve im represents the imaginary part of the gain.

[0059] This utility model also provides an electronic tag, which includes the battery antenna integrated device provided in any embodiment of this utility model. Since the electronic tag provided in the embodiments of this utility model includes the battery antenna integrated device provided in the embodiments of this utility model, it also has the same beneficial effects, and will not be described again here.

[0060] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0061] The specific embodiments described above do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery antenna integrated device, characterized in that, include: Circuit board; A solar cell is fixed to one side of the circuit board; A metal layer is disposed on the other side of the circuit board, the metal layer including a coupled ground structure and an antenna structure; along the thickness direction of the battery antenna integrated device, the orthographic projection of the ground structure at least partially overlaps with the orthographic projection of the solar cell.

2. The battery antenna integrated device according to claim 1, characterized in that, Along the thickness direction of the battery antenna integrated device, the orthographic projection of the antenna structure is located outside the orthographic projection of the solar cell, and the orthographic projection of the solar cell covers the orthographic projection of the grounding structure.

3. The battery antenna integrated device according to claim 2, characterized in that, The metal layer further includes a first battery pin and a second battery pin. The first battery pin is insulated from the grounding structure and the antenna structure, and the second battery pin is insulated from the grounding structure and the antenna structure. Both the first battery pin and the second battery pin are electrically connected to the solar cell. Along the thickness direction of the battery antenna integrated device, the orthographic projections of the first battery pin and the second battery pin are both located within the orthographic projection of the solar cell.

4. The battery antenna integrated device according to claim 3, characterized in that, Along the thickness direction of the battery antenna integrated device, the orthographic projection of the outer contours of the grounding structure, the first battery pin, and the second battery pin coincides with the orthographic projection of the solar cell.

5. The battery antenna integrated device according to claim 1, characterized in that, The antenna structure surrounds the grounding structure, or the antenna structure is disposed on one side of the grounding structure.

6. The battery antenna integrated device according to claim 1, characterized in that, The battery antenna integrated device also includes: The radio frequency identification (RFID) chip is attached to the metal layer on the side away from the circuit board; the RFID chip is electrically connected to the grounding structure and the antenna structure; and the RFID chip stores the identification information of the solar cell.

7. The battery antenna integrated device according to claim 1, characterized in that, The battery antenna integrated device also includes a battery management chip and a backup battery. The battery management chip is electrically connected to the backup battery and the solar cell, and is used to control the solar cell to charge the backup battery.

8. The battery antenna integrated device according to claim 7, characterized in that, Along the thickness direction of the battery antenna integrated device, the orthographic projections of the battery management chip and the backup battery are located outside the orthographic projection of the antenna structure and outside the orthographic projection of the solar cell.

9. The battery antenna integrated device according to claim 8, characterized in that, The battery management chip and the backup battery are attached to different sides of the circuit board.

10. An electronic tag, characterized in that, The electronic tag includes the battery antenna integration device according to any one of claims 1-9.

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