CN202977650U - Wireless charging thin-film battery with radio frequency antenna - Google Patents

Abstract

The utility model provides a wireless charging thin-film battery with a radio frequency antenna. The wireless charging thin-film battery comprises a flexible circuit board and a thin-film battery group arranged on the flexible circuit board, and is characterized in that the wireless charging thin-film battery also comprises a wireless charging module printed on the flexible circuit board and the radio frequency antenna, wherein the wireless charging module is electrically connected to the thin-film battery group. According to the wireless charging thin-film battery with the wireless charging function and the radio frequency antenna, the wireless charging module and the radio frequency antenna are integrated on the flexible circuit board of the wireless charging thin-film battery, and the wireless charging thin-film battery is low in cost and short in manufacture procedure.

Description

Wirelessly rechargeable thin-film battery with radio frequency antenna

technical field

The utility model relates to a thin film battery, in particular to a wireless charging thin film battery with a radio frequency antenna.

Background technique

"Light" and "thin" have always been the ultimate pursuit of 3C digital products, and they are the benchmark image of the 3C digital product industry. The era of blades for 3C products has come, and some 3C products such as jewelry, watches, and medical clothes with sensors etc. must be extremely light and thin, which requires that every internal component of 3C products including jewelry and watches, including batteries, wireless charging coils, and RF antennas, must meet the requirements of extreme thinness and lightness, and try to save internal components. Space can make the product extremely "light" and "thin".

When designing and manufacturing thin-film batteries for 3C products such as jewelry and watches, the current practice is to purchase wireless charging antennas and radio frequency antennas as independent components from other sources or make them through other production processes, and then assemble them on the same load. A flexible circuit board with a thin film battery. The disadvantage is that assembling the wireless charging antenna and radio frequency antenna as independent components on the flexible circuit board that also carries thin-film batteries will occupy most of the internal space of 3C products such as jewelry and watches, and affect the space of other internal components of 3C products. In addition, the cost of using the wireless charging antenna and the RF antenna as independent components is high, and the process of assembling the wireless charging antenna and the RF antenna is increased, and the process is long.

Utility model content

In view of this, the utility model provides a wireless charging wireless charging thin film battery with low cost, short manufacturing process and radio frequency antenna.

A wireless rechargeable thin film battery with a radio frequency antenna, the wireless rechargeable thin film battery includes a flexible circuit board and a thin film battery pack arranged on the flexible circuit board, and the wireless rechargeable thin film battery also includes a wireless charging device printed on the flexible circuit board A module and a radio frequency antenna, the wireless charging module is electrically connected to the thin film battery pack.

The wireless charging thin film battery with wireless charging function and radio frequency antenna of the utility model integrates the wireless charging module and the radio frequency antenna on the flexible circuit board of the wireless charging thin film battery, and has low cost and short manufacturing process.

Description of drawings

FIG. 1 is a block diagram of a wireless rechargeable thin-film battery with a radio frequency antenna in an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the wirelessly rechargeable thin-film battery with a radio frequency antenna in FIG. 1 .

Fig. 3 is a schematic cross-sectional view of a wireless rechargeable thin film battery with a radio frequency antenna in another embodiment of the present invention.

Description of main component symbols

Wireless Charging Thin Film Battery 100 flexible circuit board 10 first side 101 second side 102 wireless charging module 20 charging coil 201 Charge coupling circuit 202 thin film battery pack 30 radio frequency antenna 40 RF antenna signal feed point 401 RF antenna signal grounding point 402 RF Antenna Coil 403 Isolation layer 404

The following specific embodiments will further illustrate the utility model in conjunction with the above-mentioned accompanying drawings.

Detailed ways

Please refer to FIG. 1 and FIG. 2 together. A wireless rechargeable thin film battery 100 includes a flexible circuit board 10 . The flexible circuit board includes a first surface 101 and a second surface 102 opposite to the first surface 101 . The wireless rechargeable thin film battery 100 also includes a wireless charging module 20 printed on the first surface 101 of the flexible circuit board 10 , a thin film battery pack 30 and a radio frequency antenna 40 .

The method of printing the wireless charging module 20, the thin film battery pack 30 and the radio frequency antenna 40 on the flexible circuit board 10 includes screen printing, photosensitive printing on a photosensitive plate, laser engraving, etching, machining and the like. In this embodiment, the wireless charging module 20, the thin film battery pack 30 and the radio frequency antenna 40 are etched during the production process of the flexible circuit board 10, and the unnecessary part of the copper foil is removed by a chemical reaction method, so that Form the desired circuit diagram.

The wireless charging module 20 is printed on the first surface 101 of the flexible circuit board 10 and is electrically connected to the non-film battery pack 30 . The wireless charging module 20 includes a charging coil 201 and a charging coupling circuit 202 , the charging coil 201 is connected to the charging coupling circuit 202 , and the charging coupling circuit 202 is electrically connected to the thin film battery pack 30 . The wireless charging module 20 is used for wirelessly receiving energy supplied by an external wireless power supply device and converting the energy into electric power to charge the thin film battery pack 30 .

The radio frequency antenna 40 is printed on the first surface 101 of the flexible circuit board 10, and the radio frequency antenna 40 can be a wireless compatibility certification (Wireless Fidelity, WIFI) antenna, or a Bluetooth (Blue Tooth, BT) antenna or near Distance wireless communication technology (Near Field Communication, NFC) antenna, etc., the radio frequency antenna 40 includes a radio frequency antenna coil 403, the radio frequency antenna 40 also includes a radio frequency antenna signal feed point 401 and a radio frequency antenna signal grounding point 402, wherein, The two terminals of the radio frequency antenna coil 403 are respectively connected to the radio frequency antenna signal feed point 401 and the radio frequency antenna signal ground point 402, and the radio frequency antenna signal feed point 401 is connected to the radio frequency antenna module (not shown in the figure) of the electronic product, so The RF antenna signal ground point 402 is used for grounding.

When using the wireless charging wireless charging film battery 100 with the radio frequency antenna 40, there is no need to add an independent wireless charging module 20 and radio frequency antenna 40 in the electronic product. If the electronic product is to be charged, only the wireless charging film The battery 100 can be placed in the wireless power supply device. To connect the electronic product to the network, it is only necessary to connect the radio frequency antenna module of the electronic product to the radio frequency antenna signal feeding point 401 of the wireless rechargeable thin film battery 100 . Therefore, printing the wireless charging module 20 and the radio frequency antenna 40 on the flexible circuit board 10 can reduce the cost, reduce the assembly process of the electronic product, and save the internal space of the electronic product. If the wireless rechargeable thin-film battery 100 with the radio frequency antenna 40 is used as a component, there is no need to purchase an independent radio frequency antenna coil 403 , which can reduce costs.

Since the flexible circuit board 10 is a printed circuit board with high reliability and excellent flexibility made of polyimide or polyester film as the base material, it is thin in thickness and light in weight, please refer to the figure 3. In other embodiments, in order to further reduce the space occupied by the wireless charging thin film battery 100, the part of the flexible circuit board 10 printed with the wireless charging module 20 and the radio frequency antenna 40 can be bent downward so that the flexible circuit board 10 The bent part of the second surface 102 is equal to the unbent part, which further reduces the space occupied by the flexible circuit board 10 , thereby increasing the internal distributable space of the electronic product and reducing the overall size of the electronic product. In this embodiment, an isolation layer 404 is added between the unbent part and the bent part of the second surface 102 of the flexible circuit board 10 to prevent the flexible circuit board 10 from being partially bent downwards to form a thin-film battery pack. 30 and the radio frequency antenna 40 are too close to cause mutual interference between signals, thereby ensuring the communication quality of the radio frequency antenna 40 .

In the utility model, the wireless charging module 20 and the radio frequency antenna 40 are respectively printed on the flexible circuit board 10 with the thin film battery pack 30, which can reduce the cost, reduce the process, save the internal space of the electronic product, and can better arrange other components inside the product , which can better meet the design requirements of "light" and "thin" products.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the utility model, rather than as a limitation to the utility model, as long as within the spirit of the utility model, the above embodiments Appropriate changes and changes all fall within the scope of protection of the utility model.

Claims (4)

1. A wireless rechargeable thin film battery with a radio frequency antenna, the wireless rechargeable thin film battery includes a flexible circuit board and a thin film battery pack arranged on the flexible circuit board, it is characterized in that the wireless rechargeable thin film battery also includes a flexible circuit board printed on the flexible circuit board A wireless charging module and a radio frequency antenna on the circuit board, the wireless charging module is electrically connected to the thin film battery pack. 2. The wireless rechargeable thin film battery with radio frequency antenna as claimed in claim 1, wherein the wireless charging module includes a charging coil and a charging coupling circuit, wherein the charging coil is connected to the charging coupling circuit, and the charging coupling circuit is connected to the thin film Battery. 3. The wireless rechargeable thin film battery with radio frequency antenna as claimed in claim 1, is characterized in that, radio frequency antenna comprises radio frequency antenna coil, and two terminals of radio frequency antenna coil are electrically connected to radio frequency antenna signal feeding point and radio frequency antenna signal respectively. grounding point. 4. The wireless rechargeable thin-film battery with a radio frequency antenna according to claim 3, wherein the radio frequency antenna is one or more of a wireless compatibility certification antenna, a Bluetooth antenna and a short-range wireless communication technology antenna.

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