Wireless charging intelligent switching system

Abstract

The utility model relates to the technical field of wireless charging, in particular to a wireless charging intelligent switching system, which comprises a wireless charging transmitting end and a wireless charging receiving end, and is characterized in that the wireless charging transmitting end comprises a power supply input module, an alternating current voltage regulating circuit, a plurality of induction coils, a coil switching circuit and a power supply management module; the power supply input module is electrically connected with the alternating current voltage regulating circuit, the alternating current voltage regulating circuit is electrically connected with each winding coil, the plurality of induction coils are electrically connected with the coil switching circuit, and the power supply management module is electrically connected with the alternating current voltage regulating circuit and the coil switching circuit. The wireless charging receiving end comprises a resonance receiving coil, a voltage stabilizing circuit and a battery management module. Through the arrangement of the plurality of induction coils and the coil switching circuit, the corresponding induction coil can be selected to carry out magnetic resonance wireless charging according to the charging power requirement, and wireless charging is carried out by intelligently switching different induction coils, so that the adaptation to the charging power requirements of different devices is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless charging, in particular to a wireless charging intelligent switching system. Background Art

[0002] As an emerging and convenient charging method, wireless charging technology provides a more flexible charging method for our lives with its feature of not requiring cable connection. However, in today's society, different types of devices support wireless charging technology, such as mobile phones, watches, tablets and other devices. The wireless charging powers supported by different types of devices are also different. The charging powers supported by different devices cannot be uniformly compatible. Wireless charging technology needs to output power according to the charging power requirements. Although some high-power charging power requirements can be backward compatible with low-power charging requirements, low-power wireless charging cannot adapt to higher-power wireless charging requirements. Problems such as incompatibility and poor versatility of its wireless charging technology are gradually becoming apparent. Utility Model Content

[0003] In order to solve the above-mentioned problems, the utility model provides a wireless charging intelligent switching system, including a wireless charging transmitting end and a wireless charging receiving end, the wireless charging transmitting end includes a power input module, an AC voltage regulation circuit, a plurality of induction coils, a coil switching circuit and a power management module; the power input module is electrically connected to the AC voltage regulation circuit, the AC voltage regulation circuit is electrically connected to each winding coil respectively, a plurality of induction coils are electrically connected to the coil switching circuit respectively, and the power management module is electrically connected to the AC voltage regulation circuit and the coil switching circuit respectively; the wireless charging receiving end includes a resonant receiving coil, a voltage stabilizing circuit and a battery management module; the resonant receiving coil receives the resonant signal of the wireless charging transmitting end and converts the magnetic signal into an electrical signal; the output end of the resonant receiving coil is electrically connected to the voltage stabilizing circuit, and the battery management module is wirelessly connected to the power management module.

[0004] In a specific implementation, the induction coil includes a primary induction coil and a secondary induction coil, the primary induction coil includes L1 and L2 terminals; the secondary induction coil includes L3 and L4 terminals.

[0005] The coil switching circuit includes contactor switch 1, contactor switch 2 and contactor switch 3. The input end of contactor switch 1 is connected to the power input module, and the output end thereof is connected to the primary induction coil; one end of contactor switch 2 is connected to the power input module, and the output end thereof is connected to the secondary induction coil; contactor switch 3 is connected between the primary induction coil and the secondary induction coil, and contactor switch 3 is connected between the primary winding coil and contactor switch 1.

[0006] The power input module supports AC 220V power supply.

[0007] In order to facilitate the wireless charging transmitter to adjust the charging power, the AC voltage regulation circuit includes a boost circuit and a buck circuit.

[0008] In order to output charging electric energy of different powers, the induction coils have different numbers of turns.

[0009] In a specific implementation, the induction coils are coaxially arranged.

[0010] The induction coil is connected in parallel with a capacitor or in series with an inductor to form a resonant transmitting coil.

[0011] The beneficial effects are as follows: the utility model is a wireless charging intelligent switching system, which detects the charging status of the battery at the wireless charging receiving end through the power management module, and uses the AC voltage regulation circuit to adjust the wireless charging voltage; through the setting of several induction coils and coil switching circuits, the corresponding induction coil can be selected for magnetic resonance wireless charging according to the charging power requirement, and the series connection of the induction coils can be realized through the coil switching circuit. Wireless charging is performed by intelligently switching different induction coils, thereby realizing adaptation to the charging power requirements of different devices and improving the versatility, efficiency and stability of wireless charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the wireless charging intelligent switching system;

[0013] Figure 2 This is the control diagram of the coil switching circuit and the induction coil. DETAILED DESCRIPTION

[0014] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0015] See also Figure 1 This embodiment provides a wireless charging intelligent switching system, including a wireless charging transmitter and a wireless charging receiver. The wireless charging transmitter is connected to the power supply through a cable, the wireless charging transmitter is connected to the AC 220V power supply, and transmits electric energy to the wireless charging receiver through magnetic resonance coupling. The wireless charging receiver is used to receive the electric energy transmitted by the wireless charging transmitter to charge the device battery.

[0016] Among them, the wireless charging transmitter can be intelligently switched according to the charging power supported by the wireless charging receiver, and specifically includes a power input module, an AC voltage regulation circuit, a plurality of induction coils, a coil switching circuit and a power management module. The power input module is electrically connected to the AC voltage regulation circuit, and the power input module can transmit the power supply energy of the connected power supply end to the AC voltage regulation circuit. The AC voltage regulation circuit can boost or reduce the voltage and current input by the wireless charging transmitter module; the output end of the AC voltage regulation circuit is electrically connected to each induction coil respectively, and can transmit the regulated current to each induction coil. The induction coil is connected in parallel with a capacitor or in series with an inductor to form a resonant transmitting coil. Electromagnetic induction is generated after the current passes through the resonant transmitting coil. In order to be able to output charging energy of different powers, the number of coil turns of each induction coil is different, and each induction coil is coaxially arranged, and the direction of the current flowing through the induction coil is consistent. Several induction coils are electrically connected to the coil switching circuit respectively, and the power management module is electrically connected to the AC voltage regulation circuit and the coil switching circuit respectively. The power management module can receive the power information of the wireless charging receiving end and the remaining battery power value fed back by the charging, adjust the voltage of the AC voltage regulation circuit, or trigger the coil switching circuit to switch different induction coils in series.

[0017] The wireless charging receiving end includes a resonant receiving coil, a voltage stabilizing circuit and a battery management module. The resonant receiving coil can receive the resonant signal emitted by the wireless charging transmitting end and convert the magnetic signal into an electrical signal through electromagnetic induction. The resonant receiving coil is electrically connected to the voltage stabilizing circuit, which can stabilize the electrical signal output by the resonant receiving coil. The voltage stabilizing circuit is electrically connected to the device battery and can charge the battery. The battery management module is connected to the device battery serial port communication and can read the charging parameters of the device battery and the remaining battery energy value. The battery management module is connected to the power management module wirelessly and can feed back the read data information to the power management module, thereby adjusting the charging power of the wireless charging transmitting end.

[0018] In order to switch the induction coil of the wireless charging transmitter, the wireless charging transmitter can be adapted to the charging power of different devices. In another specific embodiment, two induction coils are taken as an example, the induction coil includes a primary induction coil and a secondary induction coil, the primary induction coil includes L1 and L2 terminals, and the secondary induction coil includes L3 and L4 terminals.

[0019] like Figure 2As shown, in order to switch the primary induction coil and the secondary induction coil in series and parallel, the coil switching circuit includes contactor switch 1, contactor switch 2 and contactor switch 3, the input end of the contactor switch 1 is connected to the power input module, and the output end thereof is respectively connected to the L1 and L2 terminals of the primary induction coil; one end of the contactor switch 2 is connected to the power input end, and the output end thereof is respectively connected to the L3 and L4 terminals of the secondary induction coil, and at the same time, a normally closed circuit breaker switch S1 is arranged between the contactor switch 2 and the negative pole of the power input module; the contactor switch 3 is connected between the primary winding coil and the contactor switch 1, the input end of the contactor switch 3, the positive input end of the contactor switch 3 is electrically connected to the negative output end of the contactor switch 2, the positive output end of the contactor switch 3 is electrically connected to the L2 terminal of the primary induction coil, and the L1 terminal of the primary induction coil is connected to the negative pole of the voltage input module via the contactor switch 3. When the wireless charging transmitter receives the charging parameters from the wireless charging receiver, if the device supports low-power charging, contactor switch 1 is closed, contactor switch 2 and contactor switch 3 are disconnected, and the wireless charging transmitter transmits charging energy only through the primary induction coil. Or contactor switch 2 is closed, contactor switch 3 and contactor switch 1 are disconnected, and the wireless charging transmitter transmits charging energy through the secondary induction coil.

[0020] When the device supports high-power charging, contactor switch 1 is disconnected, contactor switch 2 and contactor switch 3 are closed, circuit breaker switch S1 is disconnected, the primary induction coil and the secondary induction coil are connected in series to transmit charging power, and the wireless charging transmitter performs electromagnetic induction through the primary induction coil and the secondary induction coil at the same time, and the current flowing through the primary induction coil and the secondary induction coil is in the same direction, generating electromagnetic induction in the same direction, thereby increasing the magnetic flux of the resonant receiving coil of the wireless charging receiving end and increasing the charging current.

[0021] At the same time, in order to facilitate the wireless charging transmitter to adjust the charging power according to the battery management system during the transmission of charging power. The AC voltage regulation circuit includes a boost circuit and a buck circuit. The boost circuit can boost the input voltage of the power input module, increase the current flowing through the induction coil, and thus increase the charging power of the wireless charging receiving end. The buck circuit can step down the voltage input by the power input module, reduce the charging power of the wireless charging receiving end, and thus protect the device battery.

Claims

1. A wireless charging intelligent switching system, comprising a wireless charging transmitter and a wireless charging receiver, characterized in that: The wireless charging transmitter includes a power input module, an AC voltage regulation circuit, a plurality of induction coils, a coil switching circuit and a power management module; the power input module is electrically connected to the AC voltage regulation circuit, the AC voltage regulation circuit is electrically connected to each winding coil, the plurality of induction coils are electrically connected to the coil switching circuit, and the power management module is electrically connected to the AC voltage regulation circuit and the coil switching circuit; The wireless charging receiving end includes a resonant receiving coil, a voltage stabilizing circuit and a battery management module; the resonant receiving coil receives the resonant signal of the wireless charging transmitting end and converts the magnetic signal into an electrical signal; the output end of the resonant receiving coil is electrically connected to the voltage stabilizing circuit, and the battery management module is wirelessly connected to the power management module.

2. The wireless charging intelligent switching system according to claim 1, characterized in that: The induction coil includes a primary induction coil and a secondary induction coil. The primary induction coil includes L1 and L2 terminals; the secondary induction coil includes L3 and L4 terminals.

3. The wireless charging intelligent switching system according to claim 2, characterized in that: The coil switching circuit includes contactor switch 1, contactor switch 2 and contactor switch 3, wherein the input end of the contactor switch 1 is connected to the power input module, and the output end thereof is connected to the primary induction coil; One end of the contactor switch 2 is connected to the power input module, and the output end thereof is connected to the secondary induction coil; The contactor switch three is connected between the primary induction coil and the secondary induction coil, and the contactor switch three is connected between the primary winding coil and the contactor switch one.

4. The wireless charging intelligent switching system according to claim 1, characterized in that: The power input module supports AC 220V power supply.

5. The wireless charging intelligent switching system according to claim 3, characterized in that: The AC voltage regulation circuit includes a boost circuit and a buck circuit.

6. The wireless charging intelligent switching system according to claim 1, characterized in that: The induction coils have different numbers of turns.

7. The wireless charging intelligent switching system according to claim 6, characterized in that: The induction coils are coaxially arranged.

8. The wireless charging intelligent switching system according to claim 1, characterized in that: The induction coil is connected in parallel with a capacitor or in series with an inductor to form a resonant transmitting coil.

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