CN115940438A - A backplane power supply system for mobile power terminals - Google Patents

Abstract

The invention discloses a backboard type power supply system for a movable power utilization terminal, which comprises a power supply backboard, a wireless charging monomer unit and the power utilization terminal, wherein the power supply backboard is connected with the power utilization terminal; the power supply back plate supplies power to the power utilization terminal through the wireless charging single unit; the power supply back plate comprises a printed circuit board, and interdigital electrodes are printed on the surface of the printed circuit board; the wireless charging single unit comprises a shell, a plurality of metal pins, a direct current bridge stack, a power converter A and a charging transmitting end coil; the metal needles are embedded on the surface of the shell, the power converter A and the charging transmitting end coil are located in the shell, one end of each metal needle is connected with the input end of the direct current bridge stack, and when the wireless charging monomer units are adsorbed on the power supply back plate, the other end of each metal needle is connected with the interdigital electrode; and the positive electrode and the negative electrode are connected with metal needles on the interdigital fingers; the output end of the direct current bridge stack is connected with a charging transmitting end coil after passing through a power supply converter A; for converting electricity into an electromagnetic field to power the consumer terminal.

Description

A backplane power supply system for mobile power terminals

technical field

The invention belongs to the field of electric energy conversion power supply system, and in particular relates to a backboard type power supply system for a mobile power consumption terminal.

Background technique

In the patent application document with the application number CN202111446243.4 "An interactive demonstration system and method based on a power supply smart board", and the patent application document with the application number CN202121739511.7 "A liquid crystal screen intelligent display system that can be flexibly combined ", an interactive demonstration system is disclosed. The system can attach multiple screens to the back panel to realize a bulletin board with free combination of multiple screens and free human-computer interaction, which has a good display effect.

However, for this kind of display board connected to the back panel, which is composed of multiple screens freely combined and free for human-computer interaction, multiple wires need to be connected to the back, and the position for powering the screen is fixed. If it can be based on it, make If the operator can move the screen arbitrarily and get power supply, the human-computer interaction effect will be more friendly.

Furthermore, if the power supply system is not limited to supplying power to the display screen, but can supply power to a variety of power-consuming terminals, and the power-consuming terminals can still obtain power after they move freely on the backboard, it will be more convenient for the power supply terminal. exhibit.

Contents of the invention

The problem to be solved by the present invention is that the power supply can still be obtained when the user moves the power-consuming terminal on the backboard;

A backboard-type power supply system for a mobile power-consuming terminal according to the present invention includes a power supply backplane, a wireless charging single unit, and a power-consuming terminal; the power supply backplane supplies power to the power-consuming terminal through the wireless charging single unit;

The power supply backplane and the power consumption terminal are respectively adsorbed on the two sides of the wireless charging single unit;

The power supply backplane includes a printed circuit board, and interdigitated electrodes are printed on the surface of the printed circuit board.

The wireless charging single unit includes a housing, a plurality of metal pins, a DC bridge stack, a power converter A and a wireless charging transmitter module;

The metal needles are all embedded on the surface of the housing, the power converter A and the charging transmitter coil are located in the housing, one end of the metal needle is connected to the input end of the DC bridge stack, and the output end of the DC bridge stack is connected to the charging terminal after passing through the power converter A A transmitter coil; used to convert electricity into an electromagnetic field to supply power to a power-consuming terminal, and the power-consuming terminal includes a charging receiving-end coil;

When the wireless charging single unit is adsorbed on the power supply backplane, the other end of the metal needle is connected to the interdigital electrode; and the metal needles are connected to the positive and negative fork fingers.

The function of the DC bridge stack is to organize the power obtained by the metal needles into an internal power supply with a constant positive and negative regardless of the change of the positive and negative poles of its input, so as to supply power to the power converter A.

The function of the power converter A is to convert DC to DC, providing a stable and reliable DC power supply.

Further, the power supply backplane includes a magnetic material board A and an isolation board B; the isolation board B is located between the magnetic material board A and the printed circuit board to conduct isolation electricity;

The wireless charging single unit includes a magnetic material B, and a magnetic material C is provided in or on the surface of the power terminal;

The magnetic material B is used to adsorb the magnetic material plate A in the power supply backplane and the magnetic material C of the power terminal, so that the wireless charging unit is adsorbed to the power supply backplane, and the electric terminal is adsorbed to the wireless charging unit.

Further, the power supply backplane also includes a protection board and an isolation board A, the isolation board A is arranged between the protection boards of the magnetic material board A, and the protection board is also arranged around the power supply backboard for protecting the magnetic material board A, The isolation board B and the printed circuit board play a protective role.

Further, the plurality of metal needles form a circle, and all the metal needles are evenly distributed on the same circle. The fork finger width d1 of the interdigital electrode, the gap distance d2 between adjacent fork fingers; the diameter of a circle surrounded by a plurality of metal needles is R; in order to ensure that at least one metal needle is connected to other metal needles in phase On the two adjacent positive and negative electrodes, the design dimension R>d1+d2, and the distance between the two adjacent metal needles is less than 2d1+d2. The metal pins are spring copper pins.

Further, the power consumption terminal further includes a power converter B, which is connected to the wireless charging receiver module, and is used to convert electric energy to supply power to the power consumption terminal.

Beneficial effect

The backboard type power supply system for the mobile power consumption terminal of the present invention can supply power to various power consumption terminals, and the power consumption terminal can still obtain electric energy after moving freely on the backboard, which is more convenient for displaying the power supply terminal.

Description of drawings

Fig. 1 is the front view of the embodiment of the present invention;

Fig. 2 is a side view of the wireless charging single unit and the power terminal in Fig. 1;

Fig. 3 is an appearance view of the wireless charging single unit facing the charging backplane according to the embodiment of the present invention;

Fig. 4 is an appearance view of the wireless charging single unit facing the power terminal according to the embodiment of the present invention;

Fig. 5 is a schematic diagram of the principle of the internal bridge stack of the wireless charging single unit according to the embodiment of the present invention.

Among them: 1. Power supply backplane; 2. Wireless charging single unit; 21. Metal pin; 22. Groove; 3. Power terminal.

Detailed ways

A backboard type power supply system for a mobile power consumption terminal of the present invention, comprising a power supply backplane 1, a wireless charging single unit 2 and a power consumption terminal 3;

The power supply backplane 1 supplies power to the power consumption terminal 3 through the wireless charging single unit 2; the power consumption terminal in the present invention can be a terminal such as a display screen; as shown in Figure 1, the wireless charging single unit 2 is adsorbed on the power supply backplane 1 , the wireless charging display screen is adsorbed on the wireless charging single unit 2 . As shown in FIG. 2 , it is a side view of the wireless charging unit 2 and the power consumption terminal 3 in FIG. 1 . A plurality of wireless charging single units 2 can be adsorbed on the power supply backplane 1, and one wireless charging single unit 2 can be attached to one power consumption terminal 3;

The power supply backplane 1 includes a protection board, an isolation board A, a magnetic material board A, an isolation board B and a printed circuit board that are laminated in sequence. In this embodiment, the power supply backplane 1 has a size of 600mm*600mm.

The location of the protection board is the back of the power supply backplane 1, and the protection board is also wrapped around the edge of the power supply backplane 1; the material of the protection board is an acrylic board or an iron board;

The isolation plate A is between the protective plate and the magnetic material plate A, used to isolate the conduction of electricity, and is made of acrylic plate;

The magnetic material plate A is arranged between the isolation plate A and the isolation plate B, and is used for absorbing the wireless charging unit;

The isolation plate B is between the iron/magnetic material plate A and the printed circuit board, used to isolate the conduction of electricity, and is made of acrylic plate;

Interdigitated electrodes are printed on the surface of the printed circuit board; the positive and negative poles of the interdigitated electrodes are respectively connected to the positive and negative poles of the power supply device; the power supply device is a set of power supplies greater than 12 volts and less than 36 volts, which are used to provide power to the printed circuit board, thereby supplying power to the wireless charging single unit 2.

The wireless charging single unit 2 includes a housing, a plurality of metal needles 21, a magnetic material B, a DC bridge stack, a power converter A, and a wireless charging transmitter module; in this embodiment, its diameter is 124mm.

As shown in Figure 3, the metal pins 21 are all embedded in the housing, the power converter A and the wireless charging transmitter module are located in the housing, and one end of the metal pins 21 is connected to the input end of the DC bridge stack, when the wireless charging unit When the unit 2 is adsorbed on the power supply backplane 1, the other end of the metal needle 21 is connected to the interdigital electrode, and the metal needle 21 is connected to the positive and negative fork fingers, and the output end of the DC bridge stack is connected to the wireless terminal through the power converter A The charging transmitter module is used to convert electricity into an electromagnetic field to supply power to the power consumption terminal 3, and the power consumption terminal 3 is provided with a wireless charging receiver module.

The number of metal needles 21 is at least five, the diameter of a circle surrounded by a plurality of metal needles 21 is R, the fork width d1 of the interdigital electrode, and the gap distance d2 between adjacent fork fingers; in order to ensure at least A metal needle and other metal needles are connected across two adjacent positive and negative fingers, the design size R>d1+d2, and the distance between two adjacent metal needles 21 is less than 2d1+d2; in addition, the distance between the fingers d2 is larger than twice the diameter of the pogo pin to prevent short circuit risk.

The metal needle 21 is a spring copper needle, and the model is a 2 ampere spring copper needle of A543 and 3.8*8.0 of Huatan;

There are one or more magnetic materials B, located in the casing or on the surface of the casing, all of which are used for adsorption with the power supply backplane 1 or the power consumption terminal 3;

As shown in Figure 5, the function of the DC bridge stack is to organize the power obtained by the metal needle 21, no matter how the positive and negative poles of its multiple inputs change, it can be organized into an internal power supply with constant positive and negative, so as to provide power converter A powered by. In this embodiment, the number of metal needles 21 is six, and the input of the DC bridge stack is also six groups. T1~T6 represent metal needles 21, D1~D12 are diodes, which ensure the direction of current movement, and Vin and GND pass through the DC The positive and negative poles of the internal power supply behind the bridge pile do not point. No matter how the positive and negative of T1~T6 change, as mentioned above, it is guaranteed that at least one metal needle and other metal needles are connected to the adjacent two positive and negative fork fingers, so at least one group is positive and negative. Therefore, there will be stable Vin and GND.

Among them, the function of the power converter A is to convert the electric energy supplied by the power supply greater than 12 volts on the power supply backplane 1 into a stable 12 volt power supply. The reason for this design is that the power supply backplane 1 may provide multiple uncertain A large number of wireless charging single units 2 provide power, so the voltage needs to be increased; second, the interdigitated electrodes on the power supply backplane 1 provide electrical conduction, which will also bring relatively large electromagnetic interference. Therefore, a secondary power conversion circuit needs to be designed in the wireless charging single unit 2 . In this specific embodiment, a standard DC-to-DC solution developed based on the TMI33431E chip is adopted, and its input range is greater than 12 volts and less than 36 volts.

The wireless charging transmitter module is a set of coils, which are used to convert electric power into an electromagnetic field, and supply power to nearby power-consuming terminals 3 containing the wireless charging receiver module through the electromagnetic field. In the embodiment of the present invention, the wireless charging transmitter module adopts a 20W high-power wireless fast charging charger transmitter module of the QI-35 model.

The power terminal 3 includes a wireless charging receiver module, a power converter B, and a magnetic material C.

Among them, the wireless charging receiver module is a group of coils, which are used to receive the nearby electromagnetic field, convert the energy of the electromagnetic field into electricity, and provide it to the power converter B. In the embodiment of the present invention, the wireless charging receiving end module adopts a QI-35 model 20W high-power wireless fast charging receiving end module.

Wherein, the power converter B is used to provide power to the power consumption terminal 3. For example, the power consumption terminal 3 in the embodiment of the present invention may be a touch screen, etc.; to display information and accept user operations. In the embodiment of the present invention, a 10.1-inch touch display screen made by Jiangsu Austin Photoelectric Technology Co., Ltd. is used.

Wherein, the magnetic material C is arranged in or on the surface of the power consumption terminal 3 , and is attracted to the magnetic material B in the wireless charging unit 2 by electromagnetic force. As shown in Fig. 4, the magnetic material B in the embodiment of the present invention includes magnetic material B1 and magnetic material B2. Side, used for adsorption with power supply backplane 1; magnetic material B2 is located in the case of wireless charging unit 2, adjacent to the side of power terminal 3, used for adsorption with power terminal 3, in the case of wireless charging unit 2 There is a groove 22 on the surface of the body facing the power terminal 3, and the corresponding surface of the power terminal 3 is provided with a protrusion, which is used for when the wireless charging single unit 2 and the power terminal 3 are adsorbed, the protrusion on the surface of the power terminal 3 It cooperates with the groove 22 on the shell surface of the wireless charging single unit 2 to better position the power terminal 3 .

Claims (8)

1. A backboard type power supply system for a mobile power terminal, characterized in that it includes a power supply backplane, a wireless charging unit and a power terminal; the power supply backplane supplies power to the power terminal through the wireless charging unit ; The power supply backplane and the power consumption terminal are respectively adsorbed on the two sides of the wireless charging single unit; The power supply backplane includes a printed circuit board, and interdigitated electrodes are printed on the surface of the printed circuit board; The wireless charging single unit includes a shell, a plurality of metal needles, a DC bridge stack, a power converter A and a charging transmitter coil; The metal needles are all embedded on the surface of the housing, the power converter A and the charging transmitter coil are located in the housing, and one end of the metal needle is connected to the input end of the DC bridge stack. When the wireless charging single unit is adsorbed on the power supply backplane, The other end of the metal needle is connected to the interdigital electrode; and the metal needles are connected to the positive and negative fork fingers; The output end of the DC bridge stack is connected to the charging transmitter coil after passing through the power converter A; it is used to convert electricity into an electromagnetic field to supply power to the power consumption terminal, and the power consumption terminal includes the charging receiver coil. 2. According to claim 1, a backplane type power supply system for mobile power terminals is characterized in that the power supply backplane includes a magnetic material plate A and an isolation plate B; the isolation plate B is located between the magnetic material plate A and the printed The conduction between circuit boards is used to isolate electricity; The wireless charging single unit includes a magnetic material B, and a magnetic material C is provided in or on the surface of the power terminal; The magnetic material B is used to adsorb the magnetic material plate A in the power supply backplane and the magnetic material C of the power terminal, so that the wireless charging unit is adsorbed to the power supply backplane, and the power consumption terminal is adsorbed to the wireless charging unit. 3. A backboard type power supply system for mobile power terminals according to claim 1, wherein the power supply backplane also includes a protection board and an isolation board A, and the isolation board A is arranged on the magnetic material board A Between the protection boards, the protection boards are also arranged around the power supply backplane. 4. A backboard type power supply system for a mobile power consumption terminal according to claim 1, wherein the plurality of metal needles form a circle, and all the metal needles are evenly distributed on the same circle. 5. A backboard type power supply system for a movable power terminal according to claim 4, characterized in that, the interdigital electrode has an interdigital width d1 and a gap distance d2 between adjacent interdigital fingers; The diameter of a circle surrounded by a plurality of metal needles is R; In order to ensure that at least one metal needle is connected to other metal needles across two adjacent positive and negative electrodes, the design dimension R>d1+d2, and the distance between two adjacent metal needles is less than 2d1+d2. 6 . A backboard type power supply system for a mobile power terminal according to claim 1 , wherein the metal pins are spring copper pins. 6 . 7. A backboard type power supply system for a mobile power consumption terminal according to claim 1, wherein the number of metal pins is at least five. 8. A backboard type power supply system for a mobile power consumption terminal according to claim 1, wherein the power consumption terminal further comprises a power converter B, and the power converter B is connected to the charging receiver coil.

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