Charging device compatible with DC input and AC input

Abstract

The embodiment of the invention provides a charging device compatible with direct current input and alternating current input. The charging device comprises an input unit which is coupled to a power supply and is suitable for receiving at least one of alternating current and direct current input by the power supply; the rectifying unit is coupled to the output end of the input unit in series and is suitable for converting alternating current in the input unit into direct current; the voltage transformation unit is connected to the rectification unit in series and is suitable for adjusting the first voltage of the direct current output by the rectification unit to a preset second voltage; the output unit is coupled to the voltage transformation unit and is suitable for outputting the direct current with the second voltage to the electric appliance; and the processing unit is coupled to the voltage transformation unit and the output unit, and is configured to adjust the magnitude of the second voltage according to the difference of the electric appliances, so that the second voltage conforms to the preset voltage of the electric appliances. Therefore, the charging device can be coupled to the direct-current power supply or the alternating-current power supply and supplies power to the electric appliance, and the use convenience of the charging device is improved.

Description

Technical Field

[0001] Exemplary embodiments of the present disclosure generally relate to the field of electrical equipment, and particularly to a charging device compatible with DC input and AC input. Background Art

[0002] With the continuous development of DC power supply, DC input charging devices have gradually played a more important role. On the other hand, in scenarios where DC power supply and AC power supply coexist, users need to select a DC input charging device or an AC input charging device according to the different power sources used. This also brings inconvenience to the actual use of users. Summary of the Invention

[0003] In a first aspect of the present disclosure, a charging device compatible with DC input and AC input is provided. The charging device includes: an input unit, coupled to a power supply and adapted to receive at least one of alternating current and direct current input from the power supply; a rectifying unit, serially coupled to the output end of the input unit and adapted to convert the alternating current in the input unit into direct current; a voltage transforming unit, serially connected to the rectifying unit and adapted to adjust a first voltage of the direct current output by the rectifying unit to a predetermined second voltage; an output unit, coupled to the voltage transforming unit and adapted to output direct current with the second voltage to an electrical appliance; and a processing unit, coupled to the voltage transforming unit and the output unit, and configured to adjust the magnitude of the second voltage according to different electrical appliances so that the second voltage conforms to a predetermined voltage of the electrical appliance.

[0004] In some embodiments, the charging device further includes: a surge protection unit, connected in series between the input unit and the rectifying unit.

[0005] In some embodiments, the charging device further includes: a shock protection unit, connected in series between the input unit and the rectifying unit.

[0006] In some embodiments, the charging device further includes: an electromagnetic interference protection unit, connected in series between the input unit and the rectifying unit.

[0007] In some embodiments, the charging device further includes: a filtering unit, arranged between the rectifying unit and the voltage transforming unit.

[0008] In some embodiments, the processing unit includes: a signal receiving port, coupled to the output unit and adapted to obtain a pairing signal related to the electrical appliance from the electrical appliance after the output unit is connected to the electrical appliance, and the processing unit is configured to control the voltage transforming unit to adjust the second voltage output by the voltage transforming unit according to the pairing signal.

[0009] In some embodiments, the processing unit further includes: a power supply port, and the power supply port is coupled to the voltage transforming unit to supply power to the processing unit via the power supply port.

[0010] In some embodiments, the processing unit further includes: a protection port, which is coupled to the output end of the rectification unit and is adapted to issue a warning signal when the output voltage of the rectification unit is abnormal, so as to cause the processing unit to shut down.

[0011] In some embodiments, the output unit includes a Universal Serial Bus (USB) interface.

[0012] In some embodiments, the shock-resistant unit includes a thermistor.

[0013] According to an embodiment of the present disclosure, the input unit allows the power supply to supply power in at least one of the forms of direct current and alternating current. The current supplied by the power supply is rectified into direct current after passing through the rectification unit, and then enters the voltage transformation unit after current stabilization, so as to adjust the input voltage to the voltage required by the electrical appliance, and then output to the electrical appliance through the output unit. Thus, the charger can be arbitrarily connected to an AC power supply or a DC power supply and supply power to the electrical appliance. This improves the convenience of user use, and since the user only needs to prepare one charger to be applicable to both AC power supply and DC power supply scenarios, the cost is also reduced.

[0014] It should be understood that the content described in this part is not intended to limit the key features or important features of the embodiments of the present disclosure, nor is it used to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In combination with the drawings and with reference to the following detailed description, the above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent. In the drawings, the same or similar reference numerals represent the same or similar elements, where:

[0016] Figure 1 shows a schematic diagram of a charging device provided according to an embodiment of the present disclosure; and

[0017] Figure 2 shows a schematic circuit diagram of a charging device provided according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Embodiments of the present disclosure will be described in more detail below with reference to the drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0019] Note that the titles of any section / subsection provided in this document are not restrictive. Various embodiments are described throughout this document, and any type of embodiment can be included under any section / subsection. Additionally, the embodiments described in any section / subsection can be combined with any other embodiments described in the same section / subsection and / or different section / subsections in any manner.

[0020] In the description of the embodiments of the present disclosure, the term "comprising" and its like terms should be understood as open inclusion, i.e., "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "an embodiment" or "the embodiment" should be understood as "at least one embodiment". The term "some embodiments" should be understood as "at least some embodiments". There may also be other explicit and implicit definitions hereinafter. The terms "first", "second", etc. may refer to different or the same objects. There may also be other explicit and implicit definitions hereinafter.

[0021] In the description of the embodiments of the present disclosure, the charging device can be used to charge energy storage elements such as storage batteries. The charging device can also be used to directly supply power to loads such as electric lights and motors. In the following description, the energy storage element and / or the load are also referred to as electrical appliances.

[0022] As briefly mentioned above, with the continuous development of DC power supply, users often need to select whether to use a DC power supply or an AC power supply to supply power to electrical appliances according to the actual scenario. Existing charging devices include DC charging devices and AC charging devices. When users use a DC power supply or an AC power supply, they need to use the corresponding charging device to supply power to the electrical appliances. This causes inconvenience to the normal use of users. On the other hand, users need to prepare chargers of various specifications, which also increases the usage cost additionally.

[0023] According to a charging device provided by the present disclosure that is compatible with DC input and AC input, to solve or at least partially solve the above problems and other potential problems existing in the traditional solutions. According to the embodiments of the present disclosure, the input unit allows the power supply to supply power in at least one of DC and AC forms. The current supplied by the power supply is rectified into DC after passing through the rectification unit, and after passing through the current stabilization, it enters the voltage transformation unit. The voltage transformation unit adjusts the input voltage to the voltage required by the electrical appliance, and then outputs it to the electrical appliance through the output unit. Thus, the charger can be arbitrarily connected to an AC power supply or a DC power supply and supply power to the electrical appliance. The convenience of user use is improved. And since users only need to prepare one charger to be applicable to the scenarios of AC power supply and DC power supply, the cost is also reduced accordingly.

[0024] Figure 1 Shows a schematic diagram of the simplicity of the charging device circuit provided according to the embodiments of the present disclosure.Figure 2 shows a schematic circuit diagram of a charging device provided according to an embodiment of the present disclosure. As Figure 1 and Figure 2 shown, the charging device generally includes an input unit 1, a rectifying unit 2, a voltage transforming unit 3, an output unit 4, and a processing unit 5.

[0025] The input unit 1 can be connected to a power supply and receive any one or more of direct current and alternating current provided by the power supply. That is, the input unit 1 can receive direct current and / or alternating current from the power supply. The rectifying unit 2 is connected in series to the output end of the input unit 1 and is adapted to convert the alternating current in the input unit 1 into direct current. The voltage transforming unit 3 is connected in series to one end of the rectifying unit 2 away from the input unit 1 and is adapted to adjust the direct current with a first voltage input into the voltage transforming unit 3 to a direct current with a second voltage matching the electrical appliance. Subsequently, the direct current with the second voltage is output to the electrical appliance through the output unit 4 coupled to the voltage transforming unit 3.

[0026] The processing unit 5 is coupled to the voltage transforming unit 3 and the output unit 4 and is configured to control the voltage transforming unit 3 to adjust the magnitude of the output second voltage according to a predetermined voltage required by the electrical appliance connected to the output unit 4, so that the second voltage matches the voltage for charging or operating the electrical appliance. How the processing unit 5 identifies the predetermined voltage required by the electrical appliance and controls the voltage transforming unit 3 to change the output second voltage will be specifically described below.

[0027] In some embodiments, the input unit 1 may include a plug, a switching device, or a circuit breaker for connecting to a power supply. After the power supply between the power supply and the input unit 1 is turned on, the power supply can provide alternating current such as 220 - 264V to the input unit 1, and the power supply can also provide direct current such as 375V to the input unit 1.

[0028] In some embodiments, the rectifying unit 2 may include a bridge rectifier. The alternating current output from the input unit 1 to the rectifying unit 2 can be converted into positive direct current after passing through the bridge rectifier, and when the input unit 1 outputs direct current to the rectifying unit 2, the direct current can directly pass through the bridge rectifier. Thus, regardless of whether the power supply connected to the input unit 1 is a direct current power supply or an alternating current power supply, it can be output as direct current after passing through the rectifying unit 2 for further use by the electrical appliance.

[0029] In some embodiments, a filtering unit 9 is further arranged between the rectifying unit 2 and the voltage transforming unit 3. The filtering unit 9 includes a plurality of filtering capacitors connected in parallel between the output end of the rectifying unit 2 and the ground. In some embodiments, the filtering unit 9 includes two filtering capacitors arranged in parallel. One end of the two filtering capacitors is coupled to the output end of the rectifying unit 2, and the other end is grounded. Two inductance units are further arranged between the two filtering capacitors, and the two inductance units are respectively arranged in series at both ends of the two filtering capacitors. After the direct current output by the rectifying unit 2 passes through the filtering unit 9, the clutter in the current is filtered out, and the waveform of the current becomes more stable, thereby improving the quality of the output current of the charging device. At the same time, the two inductance units also have a certain effect of resisting electromagnetic interference, so as to further optimize the current output by the rectifying unit 2.

[0030] In some embodiments, an electromagnetic interference resistance unit 8 is further connected in series between the input unit 1 and the rectifying unit 2 to reduce the electromagnetic interference of the current output by the input unit 1.

[0031] In some embodiments, a surge resistance unit 6 and / or a shock resistance unit 7 may be further connected in series between the input unit 1 and the rectifying unit 2. In some embodiments, the surge resistance unit 6 may include an electronic type surge protection circuit, a resistor, a fuse, etc. In some embodiments, the shock resistance unit 7 may be a thermistor. In the initial stage when the charging device is connected to the power supply, the thermistor can provide a large impedance to protect the components in the circuit.

[0032] It should be understood that the above surge resistance unit 6, shock resistance unit 7 and electromagnetic interference resistance unit 8 can be arranged in series with each other in any appropriate order between the input unit 1 and the rectifying unit 2. For example, in some embodiments, the surge resistance unit 6 can be arranged in series between the input unit 1 and the electromagnetic interference resistance unit 8, and at the same time, the shock resistance unit 7 can be serially coupled between the electromagnetic interference resistance unit 8 and the rectifying unit 2.

[0033] In some embodiments, the processing unit 5 includes a signal receiving port 51 coupled to the output unit 4. The signal receiving port 51 is adapted to handshake with the protocol chip inside the electrical appliance after the output unit 4 is connected to the electrical appliance, and obtain the pairing signal related to the electrical appliance. In some embodiments, the pairing signal includes the rated power and rated voltage of the electrical appliance. After the signal receiving port 51 returns these pairing signals to the processing unit 5, the processing unit 5 can control the voltage transforming unit 3 to adjust the output second voltage according to the pairing signal, so that the second voltage can meet the requirements of the electrical appliance.

[0034] In some embodiments, the processing unit 5 further includes a power supply port 52, and the power supply port 52 is coupled to the voltage conversion unit 3, and the voltage conversion unit 3 can supply direct current with a third voltage to the processing unit 5. For example, the voltage conversion unit 3 may include a secondary winding, and the secondary winding is coupled to the power supply port 52 and is induced by the primary winding of the voltage conversion unit 3 to supply power to the power supply port 52.

[0035] In some embodiments, the processing unit 5 further includes a detection port, the detection port is coupled to the secondary winding of the voltage conversion unit 3, and is adapted to send a power supply signal related to the power supply voltage of the secondary winding to the processing unit 5. The processing unit 5 can adjust the second voltage output by the voltage conversion unit 3 according to the power supply signal, so that the voltage output by the output unit 4 to the electrical appliance is more accurate and stable.

[0036] In some embodiments, the processing unit 5 may further include a protection port 53, and the protection port 53 is coupled to the output end of the rectification unit 2, and is adapted to issue a warning signal when the voltage output at the output end of the rectification unit 2 exceeds or is lower than a threshold value, so that the processing unit 5 controls the voltage conversion unit 3 to stop working. Thereby protecting the internal components and circuits of the charging device.

[0037] In some embodiments, the output unit 4 may include a Universal Serial Bus (USB) interface. For example, the output unit 4 may include a Universal Serial Bus (USB) type-A interface, a USB type-C interface, etc.

[0038] The various implementations of the present disclosure have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed implementations. Many modifications and variations are obvious to those of ordinary skill in the art in the technical field without departing from the scope and spirit of the described implementations. The selection of the terms used herein is intended to best explain the principles of the implementations, practical applications, or improvements to the technologies in the market, or to enable other ordinary technicians in the technical field to understand the various implementation manners disclosed herein.

Claims

1. A charging device compatible with DC input and AC input, comprising: An input unit (1), coupled to a power supply, and adapted to receive at least one of alternating current and direct current input by the power supply; A rectification unit (2), serially coupled to the output end of the input unit (1), and adapted to convert the alternating current in the input unit (1) into direct current; A voltage transformation unit (3), serially connected to the rectification unit (2), and adapted to adjust a first voltage of the direct current output by the rectification unit (2) to a predetermined second voltage; An output unit (4), coupled to the voltage transformation unit (3), and adapted to output direct current with the second voltage to an electrical appliance; And A processing unit (5), coupled to the voltage transformation unit (3) and the output unit (4), and configured to adjust a magnitude of the second voltage according to different electrical appliances, so that the second voltage conforms to a predetermined voltage of the electrical appliance.

2. The charging device according to claim 1, further comprising: A surge protection unit (6), serially connected between the input unit (1) and the rectification unit (2).

3. The charging device according to claim 1, further comprising: A shock protection unit (7), serially connected between the input unit (1) and the rectification unit (2).

4. The charging device according to any one of claims 1 to 3, further comprising: An electromagnetic interference protection unit (8), serially connected between the input unit (1) and the rectification unit (2).

5. The charging device according to claim 1, further comprising: A filtering unit (9), arranged between the rectification unit (2) and the voltage transformation unit (3).

6. The charging device according to any one of claims 1 to 3 and 5, wherein the processing unit (5) comprises: A signal receiving port (51), coupled to the output unit (4), and adapted to obtain a pairing signal related to the electrical appliance from the electrical appliance after the output unit (4) is connected to the electrical appliance, And the processing unit (5) is configured to control the voltage transformation unit (3) according to the pairing signal to adjust the second voltage output by the voltage transformation unit (3).

7. The charging device according to claim 6, wherein the processing unit (5) further comprises: A power supply port (52), the power supply port (52) is coupled to the voltage transformation unit (3) to supply power to the processing unit (5) via the power supply port (52).

8. The charging device according to claim 6, wherein the processing unit (5) further comprises: A protection port (53), the protection port (53) is coupled to the output end of the rectification unit (2), and is adapted to issue a warning signal when the output voltage of the rectification unit (2) is abnormal, so that the processing unit (5) shuts down.

9. The charging device according to claim 1, wherein the output unit (4) comprises a universal serial bus interface.

10. The charging device according to claim 3, wherein the shock-resistant unit (7) comprises a thermistor.

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