Charging device and electric equipment

Abstract

The utility model discloses a charging device and electric equipment, and belongs to the technical field of battery charging. Each charging module comprises a voltage conversion circuit; the power driving circuit is connected with the voltage conversion circuit; and the resonant circuit is connected with the power driving circuit. According to the charging device provided by the invention, the first charging module and the second charging module are arranged, so that the requirement of charging multiple pieces of equipment at the same time is met.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of battery charging, and particularly to a charging device and an electrical device. Background Art

[0002] Wireless charging technology is a technology that uses the principle of electromagnetic induction for charging. Currently, most of the wireless charging technologies for electronic mobile devices achieve wireless power transmission through electromagnetic induction, that is, electromagnetic induction is generated between the transmitting coil in the charger and the receiving coil in the device to be charged, and then the device to be charged is wirelessly charged through the principle of electromagnetic and magnetoelectric conversion. It is widely used in the charging of portable mobile devices, and in-vehicle wireless chargers are one of its applications. Existing in-vehicle wireless chargers can only charge a single device and cannot meet the need to charge multiple devices simultaneously. Summary of the Utility Model

[0003] The purpose of the embodiments of the present application is to provide a charging device to solve the technical problem that the charging device in the prior art cannot charge multiple devices simultaneously. Another purpose of the embodiments of the present application is to provide an electrical device to solve the technical problem that the electrical device in the prior art cannot charge multiple devices simultaneously.

[0004] To solve the above technical problems, the embodiments of the present application disclose the following technical solutions:

[0005] In a first aspect, a charging device is provided, including:

[0006] A plurality of charging modules; each of the charging modules includes:

[0007] A voltage conversion circuit;

[0008] A power driving circuit, the power driving circuit is connected to the voltage conversion circuit;

[0009] A resonant circuit, the resonant circuit is connected to the power driving circuit.

[0010] In a second aspect, an electrical device is provided, and the electrical device includes the charging device according to any one of the first aspect.

[0011] One of the above technical solutions has the following advantages or beneficial effects:

[0012] Compared with the prior art, a charging device of the present application includes: a plurality of charging modules; each charging module includes: a voltage conversion circuit; a power driving circuit, the power driving circuit is connected to the voltage conversion circuit; a resonance circuit, the resonance circuit is connected to the power driving circuit. The charging device provided by the present application meets the need for charging multiple devices simultaneously by setting a plurality of charging modules. Description of the Drawings

[0013] The technical solutions and other beneficial effects of the present application will become obvious by combining the drawings and describing the specific embodiments of the present application in detail.

[0014] Figure 1 Schematic diagram of module connection of the charging device provided in the embodiment of the present application;

[0015] Figure 2 Schematic diagram of modules of the charging device provided in the embodiment of the present application;

[0016] Figure 3 Schematic diagram of circuit connection of the charging device provided in the embodiment of the present application;

[0017] Figure 4 Schematic diagram of module connection of the protection circuit provided in the embodiment of the present application;

[0018] Figure 5 Schematic diagram of circuit connection of the first filtering unit provided in the embodiment of the present application;

[0019] Figure 6 Schematic diagram of circuit connection of the second filtering unit provided in the embodiment of the present application;

[0020] Figure 7 Schematic diagram of circuit connection of the third filtering unit provided in the embodiment of the present application;

[0021] Figure 8 Schematic diagram of connection of the reverse cut-off circuit provided in the embodiment of the present application;

[0022] Figure 9 Schematic diagram of connection of the overvoltage protection circuit provided in the embodiment of the present application;

[0023] Figure 10 Schematic diagram of pin connection of the external interface provided in the embodiment of the present application.

[0024] The reference numerals are as follows:

[0025] 100 - Processor, 200 - First voltage conversion circuit, 300 - First resonant circuit, 400 - First power drive circuit, 500 - Second voltage conversion circuit, 600 - Second resonant circuit, 700 - Second power drive circuit, 800 - Input circuit, 810 - Voltage source, 820 - Level conversion circuit, 900 - Protection circuit. Detailed implementation manners

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0027] The following describes the specific implementation manners of the present application through embodiments:

[0028] As Figures 1 to 10As shown, the solution provided by the embodiments of the present application provides a charging device, including: a plurality of charging modules; for the convenience of description, the embodiments of the present application are introduced by taking two charging modules as an example, and the two charging modules are respectively represented by the first charging module and the second charging module. The charging device further includes a processor 100; the processor includes a voltage control port VRAIL_EN, a DC pulse port PWM_DCDC, a switch control port SC_EN, a frequency control port COIL_PWM_L / H, a first current acquisition port I_SENSE, a second current acquisition port I_DEMO, a first voltage acquisition port V_DEMO, and a second voltage acquisition port VCOIL; among them, the first charging module includes: a first voltage conversion circuit 200, a first power drive circuit 400, and a first resonant circuit 300; the second charging module includes: a second voltage conversion circuit 500, a second power drive circuit 700, and a second resonant circuit 600; the first voltage conversion circuit 200 and the second voltage conversion circuit 500 are respectively connected to the voltage control port VRAIL_EN and the DC pulse port PWM_DCDC of the processor 100; the voltage control port VRAIL_EN is used to control the switching operating states of the first voltage conversion circuit 200 and the second voltage conversion circuit 500; the DC pulse port PWM_DCDC is used to control the DC output voltage values of the first voltage conversion circuit 200 and the second voltage conversion circuit 500; the first power drive circuit 400 and the second power drive circuit 700 are connected to the switch control port SC_EN, the frequency control port COIL_PWM_L / H, the current acquisition port I_SENSE, and the voltage acquisition port V_DEMO of the processor 100; among them, the switch control port SC_EN is used to control the switching operating states of the first power drive circuit 400 and the second power drive circuit 700; the frequency control port COIL_PWM_L / H is used to control the operating frequency of the internal DC-to-AC conversion of the first power drive circuit 400 and the second power drive circuit 700; the first current acquisition port I_SENSE acquires the operating current monitored by the first power drive circuit 400 and the second power drive circuit 700; the second current acquisition port I_DEMO acquires the ASK (Amplitude Shift Keying) communication waveform demodulated by the receiving end by using the current signal of the first power drive circuit 400 and the second power drive circuit 700; the first voltage acquisition terminal V_DEMO acquires the ASK communication waveform demodulated by the receiving end by using the voltage signal of the first power drive circuit 400 and the second power drive circuit 700; the first resonant circuit 300 and the second resonant circuit 600 are connected to the second voltage acquisition port VCOIL of the processor 100, and the second voltage acquisition port VCOIL is used to acquire the voltage values of the first resonant circuit 300 and the second resonant circuit 600.The first voltage conversion circuit 200 and the second voltage conversion circuit 500 are respectively connected to the voltage input port VRAIL_A of the first power drive circuit 400 and the second power drive circuit 700 through the voltage output port VRAIL; the first resonance circuit 300 is connected to the first power drive circuit 400, and the second resonance circuit 600 is connected to the second power drive circuit 700. Specifically, by controlling the first charging module and the second charging module through the processor 100, the first charging module and the second charging module can charge two charging devices simultaneously or separately. However, if there is only one charging module, the charging device can only charge one charging device at a time, which cannot meet the user's need to charge multiple charging devices. The first charging module and the second charging module can respectively adjust the output power by identifying the charging power required by the device to be charged, so as to realize charging different charging devices with different powers.

[0029] As Figure 3 shown, in the solution provided by the embodiment of the present application, the processor 100 includes a microcontroller unit (MCU), and the chip model used is KF32A150. The microcontroller chip controls and monitors the working states of the first charging module and the second charging module.

[0030] In the solution provided by some embodiments of the present application, the charging device may include more charging modules, such as a third charging module, a fourth charging module, etc., which can be selected and arranged according to the actual situation. When more charging modules are arranged in the charging device, each charging module can individually adjust the output power, so as to realize simultaneous or separate charging of multiple different charging devices.

[0031] In the solution provided by the embodiment of the present application, the specific working processes of the first charging module and the second charging module include:

[0032] The first voltage conversion circuit 200 and the second voltage conversion circuit 500 are configured to receive the DC voltage of an external power supply and respectively transmit the DC voltage to the first power drive circuit 400 and the second power drive circuit 700; the first power drive circuit 400 and the second power drive circuit 700 convert the DC voltage into a high-frequency AC voltage and then transmit it to the first resonance circuit 300 and the second resonance circuit 600; the first resonance circuit 300 and the second resonance circuit 600 are configured to sense the induction coil disposed in the device to be charged. When resonance occurs between the first resonance circuit 300 and the second resonance circuit 600 and the induction coil in the device to be charged, the first resonance circuit 300 and the second resonance circuit 600 supply energy to the induction coil; the voltage conversion circuit disposed in the device to be charged converts the high-frequency AC voltage received by the induction coil into a DC voltage suitable for the device to be charged; the first power drive circuit 400 and the second power drive circuit 700 are also configured to control and drive the power between the first voltage conversion circuit 200 and the first resonance circuit 300 and between the second voltage conversion circuit 500 and the second resonance circuit 600; when the resonance frequency is reached between the induction coil of the device to be charged and the first resonance circuit 300 or the second resonance circuit 600, the transmission efficiency of the first resonance circuit 300 and the second resonance circuit 600 for transmitting energy to the induction coil will reach the maximum, thereby achieving higher power transmission; at this time, the first power drive circuit 400 and the second power drive circuit 700 adjust the output power of the first resonance circuit 300 and the second resonance circuit 600 by changing the current and voltage, so as to adjust the output power of the charging device to charge different devices to be charged.

[0033] In the solutions provided in some embodiments of the present application, the first voltage conversion circuit 200 and the second voltage conversion circuit 500 include a BULK circuit, and the chip model used is SC8101. The first voltage conversion circuit 200 and the second voltage conversion circuit 500 constituted by the chip SC8101 can be responsible for the power supply management of the chip, including the input, voltage regulation and distribution of the power supply. It can also manage and protect the chip from power problems such as overvoltage, overcurrent and short circuit. The first voltage conversion circuit 200 and the second voltage conversion circuit 500 can also provide clock management, responsible for the generation and distribution of clock signals to ensure the coordinated operation of each component inside the chip, can provide a stable clock source, and perform frequency adjustment and frequency division as needed.

[0034] In the solutions provided by some embodiments of the present application, the first power driving circuit 400 and the second power driving circuit 700 include a Power stage, and the chip model used is SC5003. In addition to being able to adjust the output power, the first power driving circuit 400 and the second power driving circuit 700 constituted by the chip SC5003 can also monitor the current and voltage between the charging device and the device to be charged. The first power driving circuit 400 and the second power driving circuit 700 are connected to the first resonant circuit 300 and the second resonant circuit 600 through the COILS pins, so as to use the feedback mechanism to monitor and adjust the magnitude of the current, thereby controlling the output power, and further protecting the charging safety of the charging device and the device to be charged. The first power driving circuit 400 and the second power driving circuit 700 can also provide protection mechanisms and feedback mechanisms. The first power driving circuit 400 and the second power driving circuit 700 can implement various protection mechanisms through different sensors and devices, such as overheat protection, overvoltage protection, short-circuit protection, etc., to ensure the safety and reliability between the charging device and the device to be charged. When an abnormal situation occurs between the charging device and the device to be charged, the first power driving circuit 400 and the second power driving circuit 700 can take timely measures to prevent device damage or safety risks.

[0035] In the solutions provided by some embodiments of the present application, the first resonant circuit 300 and the second resonant circuit 600 include an LC resonant circuit, which can convert the high-frequency alternating current signals generated by the first power driving circuit 400 and the second power driving circuit 700 into wireless electromagnetic waves and emit them outward, so as to realize wireless charging for the device to be charged.

[0036] Therefore, through the cooperation among the first resonant circuit 300 and the second resonant circuit 600, the first voltage conversion circuit 200 and the second voltage conversion circuit 500, and the first power driving circuit 400 and the second power driving circuit 700, the embodiments of the present application jointly realize the wireless charging process between the charging device and the device to be charged.

[0037] As Figure 1 and Figure 3 shown, in the solutions provided by the embodiments of the present application, the first resonant circuit 300 includes a first coil L1, a first capacitor C1, and a second capacitor C2. The first capacitor C1 is connected in parallel with the first coil L1. One end of the first coil L1 is connected to the first positive terminal of the first power driving circuit 400, the other end of the first coil L1 is connected to one end of the second capacitor C2, and the other end of the second capacitor C2 is connected to the first negative terminal of the first power driving circuit 400.

[0038] The specific working process includes:

[0039] The first coil L1 is an element with a certain inductance. When a current flows through the first coil L1, a magnetic field will be generated in the first coil L1, and the intensity of this magnetic field is proportional to the current passing through the first coil L1.

[0040] The first capacitor C1: The first capacitor C1 is an element used to store charge. The first capacitor C1 and the first coil L1 are connected in parallel to jointly form a resonant circuit. The function of the first capacitor C1 is to provide the capacitance effect in the resonant circuit and respond to the frequency of the signal.

[0041] The second capacitor C2: The second capacitor C2 is also an element used to store charge. The second capacitor C2 is connected to the first negative terminal of the first power driving circuit 400. The function of the second capacitor C2 is to form a resonant circuit together with the first capacitor C1 and receive the power signal provided by the driving circuit.

[0042] The working principle of the first resonant circuit 300 is as follows:

[0043] When the first positive terminal of the first power driving circuit 400 provides a power signal, the current flowing through the first coil L1 will generate a magnetic field therein. This magnetic field will excite the charge oscillation in the resonant circuit, including the first capacitor C1 and the second capacitor C2. The resonance effect between the first capacitor C1 and the second capacitor C2 will cause the amplitude of the charge oscillation in the resonant circuit to increase at a specific frequency, reaching the resonant state. In the resonant state, the output signal of the resonant circuit will make the output voltage or current reach the maximum value.

[0044] As Figure 1 and Figure 3 shown, in the solution provided by the embodiment of the present application, the second resonant circuit 600 includes a second coil L2, a third capacitor C3, and a fourth capacitor C4. The third capacitor C3 is connected in parallel with the second coil L2. One end of the second coil L2 is connected to the second positive terminal of the second power driving circuit 700, the other end of the second coil L2 is connected to one end of the fourth capacitor, and the other end of the fourth capacitor C4 is connected to the second negative terminal of the second power driving circuit 700.

[0045] The specific working process includes:

[0046] The second coil L2 is an element with a certain inductance. When a current flows through the second coil L2, a magnetic field will be generated in the second coil L2, and the intensity of this magnetic field is proportional to the current passing through the second coil L2.

[0047] The third capacitor C3: The third capacitor C3 is an element used to store charge. The third capacitor C3 and the second coil L2 are connected in parallel to jointly form a resonant circuit. The function of the third capacitor C3 is to provide the capacitance effect in the resonant circuit and respond to the frequency of the signal.

[0048] Fourth capacitor C4: The fourth capacitor C4 is also an element for storing electric charge. The fourth capacitor C4 is connected to the first negative terminal of the first power driving circuit 400. The function of the fourth capacitor C4 is to form a resonant circuit together with the third capacitor C3 and receive the power supply signal provided by the driving circuit.

[0049] The working principle of the second resonant circuit 600 is the same as that of the first resonant circuit 300, and details are not described in this embodiment of the present application.

[0050] As Figure 2 and Figure 3 shown, in the solution provided by this embodiment of the present application, the charging device further includes an input circuit 800. The input circuit 800 includes a voltage source 810 and a level conversion circuit 820. The voltage source 810 is connected to the level conversion circuit 820, and the level conversion circuit 820 is connected to the processor 100.

[0051] The specific working process includes:

[0052] The voltage source 810 includes a 5V BULK module. The voltage source 810 receives a relatively high input voltage and converts it into a relatively low 5V voltage, thereby achieving the buck function to ensure the stability and applicability of the output voltage.

[0053] The level conversion circuit 820 includes a Low Dropout Voltage Regulator (LOD). Its main functions include:

[0054] Voltage conversion: The LOD receives the 5V voltage from the BULK and converts it into the required 3.3V voltage. The LOD can utilize the principle of voltage regulators, such as linear regulators or switching regulators and other technologies to complete this conversion process;

[0055] Voltage regulation and filtering: The LOD can provide a stable voltage output and reduce the interference of noise and ripples on the power supply through filtering to ensure the stability and reliability of the output 3.3V voltage.

[0056] Power overload protection: When the current exceeds the set threshold or a short circuit occurs, the LOD will take measures to ensure the safety and stability of the system, and has the function of protecting against problems such as power overload and short circuit.

[0057] As Figures 1 to 3 shown, in the solution provided by this embodiment of the present application, the charging device further includes an input interface. One end of the input interface is connected to an external DC power supply, and the other end of the input interface is connected to the voltage conversion circuit. The specific working process includes:

[0058] The input interface includes an input connector, which is an interface used to connect an external signal or power source to the inside of a device or system. The input connector provides a physical interface so that signals, data, or power can enter the device or system for processing, transmission, or power supply.

[0059] Among them, the inputs of the input connector include the following types:

[0060] Signal input: Such as audio input, video input, or sensor data input. Through the input connector, an external device or sensor can transmit signals to the inside of the device or system for processing, recording, or display;

[0061] Data input: The input connector can be used to transfer data from an external device to the inside of the device or system through a data line or interface, including keyboards, mice, USB devices, Ethernet connections, etc.;

[0062] Power input: There are also some input connectors designed to receive power supply. By connecting a power cord or adapter, the device or system can obtain the required electrical energy for operation.

[0063] As Figures 1 to 9 shown, in the solution provided by the embodiment of the present application, the charging device further includes a protection circuit 900. The protection circuit 900 includes a filtering circuit, a reverse cut-off circuit, and an overvoltage protection circuit. One end of the filtering circuit is connected to the input interface, and the other end of the filtering circuit is connected to the voltage conversion circuit; One end of the overvoltage protection circuit is connected to the filtering circuit, and the other end of the overvoltage protection circuit is connected to the voltage conversion circuit; One end of the reverse cut-off circuit is connected to the overvoltage protection circuit, and the other end of the overvoltage protection circuit is connected to the voltage conversion circuit.

[0064] As Figures 4 to 7 shown, in the solution provided by the embodiment of the present application, the filtering circuit includes a first filtering unit, a second filtering unit, and a third filtering unit for progressive filtering; Among them, the first filtering unit, the second filtering unit, and the third filtering unit are connected in series in sequence. The end of the first filtering unit far from the second filtering unit is connected to the input interface. The end of the third filtering unit far from the second filtering unit is connected to the reverse cut-off circuit. The other end of the reverse cut-off circuit is connected to the overvoltage protection circuit. The other end of the overvoltage protection circuit is the output end; Or the first filtering unit, the reverse cut-off circuit, the second filtering unit, the overvoltage protection circuit, and the third filtering unit are connected in series in sequence. The end of the third filtering unit far from the overvoltage protection circuit is the output end.

[0065] As Figure 5As shown, in the solution provided by the embodiment of the present application, the first filtering unit includes a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a third inductor L3, a third diode D3, a positive signal input terminal VIN+, a negative signal input terminal VIN−, and a first filtering output terminal A; wherein, the fifth capacitor C5 and the sixth capacitor C6 are connected in series with each other and then in parallel with the third diode D3, and one end of the fifth capacitor C5 and the sixth capacitor C6 is configured as the positive signal input terminal VIN+, the positive signal input terminal VIN+ is connected to the positive electrode of the power supply, the end of the sixth capacitor C6 far from the fifth capacitor C5 is configured as the negative signal input terminal VIN−, the negative signal input terminal VIN− is connected to the negative electrode of the power supply; the third diode D3 is a bidirectional TVS diode, the third inductor L3 is a four-pin inductor, both ends of the third diode D3 are respectively connected to the first pin and the fourth pin of the third inductor L3, and both ends of the seventh capacitor C7 and the eighth capacitor C8 in parallel are respectively connected to the second pin and the third pin of the third inductor L3; wherein, the maximum current rating of the third inductor L3 is 5 amperes (A); the second pin of the third inductor L3 is configured as the first filtering output terminal A, the third pin of the third inductor L3 is grounded, and the fourth pin of the third inductor L3 is connected to the chassis or the bottom plate.

[0066] As Figure 6 shown, in the solution provided by the embodiment of the present application, the second filtering unit includes a ninth capacitor C9, a tenth capacitor C10, a fourth inductor L4, a second filtering input terminal D, and a second filtering output terminal E; wherein, one end of the ninth capacitor C9 is connected to one end of the fourth inductor L4, one end of the tenth capacitor C10 is connected to the other end of the fourth inductor L4, and the other ends of the ninth capacitor C9 and the tenth capacitor C10 are grounded; the end of the fourth inductor L4 connected to the ninth capacitor C9 is configured as the second filtering input terminal D, and the end of the fourth inductor L4 connected to the tenth capacitor C10 is configured as the second filtering output terminal E.

[0067] As Figure 7As shown, in the solution provided by the embodiment of the present application, the third filtering unit includes a thirteenth capacitor C13, a fourteenth capacitor C14, a fifteenth capacitor C15, a third filtering input terminal H, and a third filtering output terminal OUT; wherein, one end of the thirteenth capacitor C13, one end of the fourteenth capacitor C14, and one end of the fifteenth capacitor C15 are connected to one point, and the other ends of the thirteenth capacitor C13, the fourteenth capacitor C14, and the fifteenth capacitor C15 are all grounded; wherein, one end of the thirteenth capacitor C13 is configured as the third filtering input terminal H, and one end of the fifteenth capacitor C15 is configured as the third filtering output terminal OUT. When the third filtering input terminal H is connected to the overvoltage protection circuit, the third filtering output terminal OUT is configured as the output terminal of the protection circuit, and the output terminal of the protection circuit is respectively connected to the first voltage conversion circuit 200, the second voltage conversion circuit 500, and the voltage source 810.

[0068] In the solution provided by some embodiments of the present application, the filtering circuit may further include a system power filter for filtering and stabilizing the power supply of the system. The main function of the system power filter is to provide power filtering and noise suppression in the circuit to ensure a stable and pure power supply. Generally speaking, the system power filter usually consists of multiple capacitors, inductors, and resistors. These devices work in different frequency ranges to filter out high-frequency noise and interference in the power supply. Specifically, the system power filter can achieve the following functions:

[0069] Filter out high-frequency noise: There are various high-frequency noise signals in the power supply, and the system power filter filters out these high-frequency noises through capacitors and inductors.

[0070] Provide a stable power supply: The system power filter stabilizes the voltage and current output of the power supply through capacitors and inductors, reduces power fluctuations and voltage peaks, and ensures that the circuit obtains a stable power supply.

[0071] Improve signal quality: The system power filter can also improve signal quality, especially for applications that require high-precision and low-noise power supplies. The accuracy and reliability of the signal are improved by filtering interference.

[0072] In the solution provided by the embodiment of the present application, the reverse cut-off circuit is mainly used to prevent reverse voltage and excessive voltage from damaging the circuit or components. Specifically, the reverse cut-off circuit can provide reverse voltage protection for the circuit. When the circuit is connected to a power supply with the wrong polarity, the reverse cut-off circuit can prevent the current from flowing in the wrong direction and prevent damage to the relevant circuit or device.

[0073] Such as Figure 8As shown, in the solution provided by the embodiment of the present application, the reverse cut-off circuit includes a first transistor Q1, a first diode D1, a third resistor R3, a fourth resistor R4, a reverse cut-off input terminal B, and a reverse cut-off output terminal C. Among them, the drain of the first transistor Q1 is configured as the reverse cut-off input terminal B, the source of the first transistor Q1 is connected to the cathode of the first diode D1, the gate of the first transistor Q1 and the anode of the first diode D1 are both connected to one end of the fourth resistor R4, the other end of the fourth resistor R4 is grounded, one end of the third resistor R3 is connected to the cathode of the first diode D1, and the other end of the third resistor R3 is connected to the anode of the first diode D1. Among them, the end of the third resistor R3 connected to the pin of the first diode D1 is configured as the reverse cut-off output terminal C.

[0074] In the solution provided by the embodiment of the present application, the overvoltage protection circuit can provide overvoltage protection for the circuit. When there is an excessive voltage in the circuit, the overvoltage protection circuit can quickly detect and take measures to protect other circuits and components from being damaged by the excessive voltage. Usually, it includes disconnecting the circuit or diverting the excessive voltage to the ground. The reverse cut-off circuit and the overvoltage protection circuit are usually composed of diodes, overvoltage protection devices (such as metal oxide varistors), and related circuits to protect the circuits in the charging device from reverse voltage and excessive voltage damage.

[0075] As Figure 9As shown, in the solution provided by the embodiment of the present application, the overvoltage protection circuit includes a second transistor Q2, a third transistor Q3, a fourth transistor Q4, an eleventh capacitor C11, a twelfth capacitor C12, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a second diode D2, a fourth diode D4, an overvoltage protection input terminal F, and an overvoltage protection output terminal G; wherein, the source electrode of the second transistor Q2 is connected to the cathode of the second diode, the emitter of the third transistor Q3, and one end of the ninth resistor R9, the gate of the second transistor Q2 is connected to one end of the fifth resistor R5, the anode of the second diode, and the collector of the third transistor Q3, the drain of the second transistor Q2 is connected to the cathode of the fourth diode D4, and the anode of the fourth diode D4 is connected to the base of the fourth transistor Q4; the other end of the fifth resistor R5 is grounded; the base of the third transistor Q3 is connected to one end of the twelfth capacitor C12, one end of the eleventh capacitor C11, and the collector of the fourth transistor Q4, the other end of the twelfth capacitor C12 is connected to one end of the eighth resistor R8, and the other end of the eighth resistor R8 and the other end of the eleventh capacitor C11 are both connected to the anode of the second diode D2; both ends of the sixth resistor R6 are respectively connected to the emitter of the fourth transistor Q4 and the anode of the fourth diode D4; the emitter of the fourth transistor Q4 is further connected to one end of the seventh resistor R7, and the other end of the seventh resistor R7 is grounded; the source electrode of the second transistor Q2 is further configured as the overvoltage protection input terminal F, and the drain of the second transistor Q2 is further configured as the overvoltage protection output terminal G.

[0076] As Figure 10 shown, in the solution provided by the embodiment of the present application, the charging device further includes a bus interface, and the bus interface includes at least one of a CAN (Controller Area Network) bus interface, a LIN (Local Interconnect Network) bus interface, an I2C (Inter-Integrated Circuit) bus interface, and an NFC (Near Field Communication) bus interface. Specifically, the CAN (Controller Area Network) bus is a commonly used serial communication protocol and is widely used in communication systems in the fields of automobiles, industrial automation, and others. The I2C (Inter-Integrated Circuit) bus is a serial communication protocol used for short-distance data transmission between chips. The LIN (Local Interconnect Network) bus is a serial communication protocol commonly used in low-speed, short-distance vehicle electronic systems, such as door control, seat control, and dashboard control in automobiles. NFC (Near Field Communication) is a short-distance wireless communication technology that can realize data exchange and interconnection between devices.

[0077] As Figure 10As shown, in the solution provided by the embodiments of the present application, the processor 100 is connected to different interfaces in the bus interface through different pins. Among them, the processor 100 is connected to the CAN bus interface through the CAN_RX pin and the CAN_TX pin. Among them, the CAN_RX pin is used to receive the data frame of the CAN bus, and the CAN_TX pin is used to send the data frame of the CAN bus; the processor 100 is connected to the LIN bus interface through the LIN_RX pin and the LIN_TX pin. Among them, the LIN_RX pin is used to receive the data sent by other nodes on the LIN bus, and the LIN_TX pin is used to send the data sent by other nodes on the LIN bus; the processor 100 is connected to the NFC interface through the NFC_WAKE pin and the NFC_IRQ (Interrupt Request, IRQ) pin. Among them, the NFC_WAKE pin is used to wake up the pin of the function related to NFC, and the NFC_IRQ pin receives the interrupt signal of the NFC module; the processor 100 is connected to the I2C bus interface through the I2C pin, and the I2C pin is used to implement the communication of the I2C bus protocol.

[0078] As Figure 10 shown, in the solution provided by the embodiments of the present application, the charging device further includes an external interface, and the external interface includes at least one of a fan interface and an indicator light interface. Specifically, the processor 100 is connected to the fan interface through the FAN_PWM pin. The FAN_PWM pin is used to transmit a PWM (Pulse Width Modulation) signal that can control the fan, so as to realize controlling the rotation speed of the fan, etc.; the processor 100 is connected to the indicator light interface through the LED_PWM pin. The LED_PWM pin is used to transmit a PWM signal that can control the indicator light, so as to realize controlling the indicator light to emit light or adjusting the brightness. The fan interface is used to connect the fan and adjust the rotation speed of the fan to realize the control of the air volume. The indicator light interface is used to connect the indicator light and can be used to adjust the brightness and blinking effect of the indicator light.

[0079] As Figure 10As shown, in the solution provided by the embodiments of the present application, the CAN bus interface and the LIN bus interface are also connected to the input connector. Among them, the CAN bus interface is connected to the input connector through the CAN_H and CAN_L pins. Among them, the CAN_H pin is used to connect the pin of the CAN bus high-level line, and the CAN_L pin is used to transmit the low-level signal on the CAN bus; the LIN bus interface is connected to the input connector through the LIN pin, and the LIN pin is used to connect the pin of the LIN bus. Through the setting of the external interface, the charging device can provide additional functions such as input, output, communication, and storage, making the charging device have more possibilities and flexibility, thereby improving the scalability, compatibility, and interoperability of the charging device, and at the same time facilitating the maintenance and upgrade of the charging device.

[0080] As Figure 3 As shown, in the solution provided by the embodiments of the present application, the first voltage conversion circuit 200 is connected to the first power drive circuit 400 through the first resistor R1, and the second voltage conversion circuit 500 is connected to the second power drive circuit 700 through the second resistor R2. The specific working process includes:

[0081] The main function of the first resistor R1 is to limit the current between the first voltage conversion circuit 200 and the first power drive circuit 400; the main function of the second resistor R2 is to limit the current between the second voltage conversion circuit 500 and the second power drive circuit 700. Therefore, the first resistor R1 and the second resistor R2 can prevent component damage caused by excessive instantaneous current. The first resistor R1 and the second resistor R2 can be adjusted according to the required current limit and circuit requirements. At the same time, the first resistor R1 and the second resistor R2 can also be used for load matching with the power supply to achieve optimal power transmission. At an appropriate resistance value, maximum power transmission will be achieved between the power supply and the power drive circuit. In addition to current limiting and load matching, the first resistor R1 and the second resistor R2 can also prevent reverse current and voltage division. Selecting according to the requirements and characteristics of the circuit can ensure the normal operation and safety of the circuit.

[0082] In the solution provided by the embodiments of the present application, an electrical device is also provided, and the electrical device includes the charging device provided in any one of the above embodiments.

[0083] The above has introduced in detail a charging device and an electrical device provided by the embodiments of the present application. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of the present application; those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A charging device, characterized in that, Comprising: Multiple charging modules; Each of the said charging modules comprises: A voltage conversion circuit; A power drive circuit, the power drive circuit being connected to the voltage conversion circuit; A resonant circuit, the resonant circuit being connected to the power drive circuit; The resonant circuit includes a coil, a first capacitor and a second capacitor. The first capacitor is in parallel with the coil. One end of the coil is connected to the positive terminal of the power drive circuit, the other end of the coil is connected to one end of the second capacitor, and the other end of the second capacitor is connected to the negative terminal of the power drive circuit.

2. The charging device according to claim 1, wherein The voltage conversion circuit is connected to the power drive circuit through a resistor.

3. The charging device according to claim 1, characterized in that, The charging device further includes an input interface. One end of the input interface is connected to an external DC power supply, and the other end of the input interface is connected to the voltage conversion circuit.

4. The charging device according to claim 3, wherein, The charging device further includes a filtering circuit. One end of the filtering circuit is connected to the input interface, and the other end of the filtering circuit is connected to the voltage conversion circuit.

5. The charging device according to claim 4, wherein The charging device further includes an overvoltage protection circuit. One end of the overvoltage protection circuit is connected to the filtering circuit, and the other end of the overvoltage protection circuit is connected to the voltage conversion circuit.

6. The charging device according to claim 5, wherein, The charging device further includes a reverse cut-off circuit. One end of the reverse cut-off circuit is connected to the overvoltage protection circuit, and the other end of the overvoltage protection circuit is connected to the voltage conversion circuit.

7. The charging device according to claim 1, wherein, The charging device further includes a bus interface. The bus interface includes at least one of a CAN bus interface, a LIN bus interface, an I2C bus interface, and an NFC bus interface.

8. The charging device according to claim 1, wherein, The charging device further includes an external interface. The external interface includes at least one of a fan interface and an indicator light interface.

9. An electrical device, characterized in that, The electrical device includes the charging device according to any one of claims 1-8.

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