CN214707264U - Charging device - Google Patents
Charging device Download PDFInfo
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- CN214707264U CN214707264U CN202023121366.4U CN202023121366U CN214707264U CN 214707264 U CN214707264 U CN 214707264U CN 202023121366 U CN202023121366 U CN 202023121366U CN 214707264 U CN214707264 U CN 214707264U
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Abstract
The utility model provides a charging device, include: a power input terminal for receiving an AC power signal; the voltage doubling circuit is connected with the power input end and converts the alternating current power supply signal into a first direct current power supply signal; and the flyback circuit is connected with the voltage doubling circuit and is used for converting the first direct-current power supply signal into a second direct-current power supply signal and outputting the second direct-current power supply signal. Therefore, according to the utility model discloses a charging device has improved charging device's efficiency when having realized charging device's small size, avoids charging device's the overheated condition, promotes charging device's life by a wide margin.
Description
Technical Field
The utility model relates to a battery technology field, more specifically relate to charging device.
Background
With the development of intelligent devices and the popularization of portable electronic products, higher requirements are put on the portability of charging devices in the market, and power adapters and chargers with small volumes are the future trend, and the reduction of the volumes becomes the primary target of all manufacturers. However, the current small-sized charging device is not efficient, and the charging device is easy to generate heat in the charging process due to the limitation of the volume, so that the charging device is easy to damage, and the service life of the charging device is seriously shortened.
Therefore, the charging device in the prior art is easily overheated, and the charging device is not efficient, which affects the service life of the charging device.
SUMMERY OF THE UTILITY MODEL
The present invention has been made in view of the above problems. The utility model provides a charging device when can realize charging device's little bulkiness, has improved charging device's efficiency, avoids charging device's the overheated condition, promotes charging device's life by a wide margin.
According to the utility model discloses, a charging device is provided, the device includes:
a power input terminal, including a first input terminal and a second input terminal, for receiving an AC power signal;
the voltage doubling circuit is connected with the power input end and converts the alternating current power supply signal into a first direct current power supply signal;
and the flyback circuit is connected with the voltage doubling circuit and is used for converting the first direct-current power supply signal into a second direct-current power supply signal and outputting the second direct-current power supply signal.
Illustratively, the voltage doubling circuit includes:
the rectifying circuit is connected to the power input end and used for converting the alternating current power supply signal into a third direct current power supply signal;
a switching circuit connected to the rectifying circuit;
the controller is connected with the power supply input end and the switch circuit and is used for detecting the input voltage of the power supply input end and controlling the on-off of the switch circuit according to the input voltage;
and the filter circuit is connected with the rectifying circuit and the switch circuit and outputs the first direct current power supply signal.
For example, when the controller detects that the input voltage is within a preset voltage range, the switch circuit is controlled to be conducted.
Illustratively, the controller controls the switching circuit to turn off when detecting that the input voltage is not within a preset voltage range.
Illustratively, the preset voltage range includes: 85V-150V alternating voltage.
Illustratively, the apparatus further includes a first resistor connected between the first input terminal and the controller, and a second resistor connected between the second input terminal and the controller, and the controller detects the input voltage through the first resistor and the second resistor.
Illustratively, the switching circuit includes a first switching tube and a second switching tube, and the first switching tube and the second switching tube are connected in series between the second input end and the filter circuit.
Illustratively, the filter circuit includes a first capacitor connected between the switch circuit and the positive output terminal of the rectifier circuit, and a second capacitor connected between the switch circuit and the negative output terminal of the rectifier circuit.
Illustratively, the flyback circuit includes:
the flyback circuit input end is used for receiving the first direct current power supply signal;
a transformer including a primary winding and a secondary winding, the primary winding storing energy of the first DC power supply signal and being discharged by the secondary winding;
a first switch connected in series with the primary winding to the input;
a second switch connected between the secondary winding and a positive output terminal of the flyback circuit;
a third capacitor connected in parallel with the primary winding and the first switch in series;
the buffer circuit is connected with the primary winding in parallel, the buffer circuit comprises a fourth capacitor, a resistor and a third switch, and the fourth capacitor is connected with the resistor in parallel and then connected with the third switch in series;
and the fifth capacitor is connected in parallel between the positive output end and the negative output end of the flyback circuit.
According to the utility model discloses a charging device promotes and stabilizes at less voltage range with the input signal of wide range through voltage doubling circuit to through flyback circuit realization high efficiency output, when having realized charging device's small size, improved charging device's efficiency, avoid charging device's the overheated condition, promote charging device's life by a wide margin.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail embodiments of the present invention with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the invention and not to limit the invention. In the drawings, like reference numbers generally represent like parts or steps.
Fig. 1 is a schematic block diagram of a charging device according to an embodiment of the present invention;
fig. 2 is an example of a voltage doubling circuit of a charging device according to an embodiment of the present invention;
fig. 3 is an example of a flyback circuit of a charging device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, exemplary embodiments according to the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the present invention and are not intended to limit the invention to the particular embodiments described herein. Based on the embodiments of the present invention described in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.
Currently, most of charging devices are implemented by a Flyback topology, and the charging devices need to further reduce the volume and improve the efficiency of the charging devices, so that the charging devices after reducing the volume do not easily generate heat in the charging process.
Based on the above consideration, the utility model provides a charging device. Referring to fig. 1, fig. 1 shows a schematic block diagram of a charging device according to the present invention. As shown in fig. 1, the charging device 100 includes:
a power input terminal 110, including a first input terminal and a second input terminal, for receiving an ac power signal;
a voltage doubling circuit 120 connected to the power input terminal, for converting the ac power signal into a first dc power signal;
and the flyback circuit 130 is connected with the voltage doubling circuit, and converts the first direct-current power supply signal into a second direct-current power supply signal and outputs the second direct-current power supply signal.
The power input end of the charging device is connected with an external alternating current power supply signal, the alternating current power supply signal is stabilized in a certain interval after passing through the voltage doubling circuit, namely no matter the input voltage of the charging device is in a high-voltage interval or a low-voltage interval, after the conversion of the voltage doubling circuit, the output voltage of the voltage doubling circuit is in a certain interval, and then the output voltage is converted through the flyback circuit and then is output. Compared with the situation that the charging device is directly realized by adopting a flyback topology, the minimum input voltage of the flyback circuit is not increased, the input current is reduced, and the copper loss of the primary winding of the transformer in the flyback circuit is effectively reduced. Therefore, the wide range of the input voltage of the whole charging device is ensured, the input voltage range of the flyback circuit is narrowed, the frequency variation range is narrowed, the magnetic loss of a transformer in the flyback circuit is reduced under the condition of the same power, the efficiency of the flyback circuit is improved, the efficiency of the whole charging device is improved, the overheating condition of the charging device is solved, and the service life of the charging device is greatly prolonged.
Illustratively, the voltage doubling circuit includes:
the rectifying circuit is connected to the power input end and used for converting the alternating current power supply signal into a third direct current power supply signal;
a switching circuit connected to the rectifying circuit;
the controller is connected with the power supply input end and the switch circuit and is used for detecting the input voltage of the power supply input end and controlling the on-off of the switch circuit according to the input voltage;
and the filter circuit is connected with the rectifying circuit and the switch circuit and outputs the first direct current power supply signal.
In some embodiments, the controller controls the switching circuit to conduct when the controller detects that the input voltage is within a preset voltage range.
In some embodiments, the controller controls the switching circuit to turn off when the controller detects that the input voltage is not within a preset voltage range.
In some embodiments, the preset voltage range includes: 85V-150V alternating voltage.
It should be understood that the preset voltage range can be set according to the requirement, and is not limited herein.
The voltage doubling circuit is characterized in that the controller detects the input voltage of the alternating current power supply signal, and the controller controls whether the switch circuit is conducted or not according to the detected input voltage. When the input voltage is in a preset voltage range (such as a low-voltage range 85Vac-150Vac), the controller sends a trigger signal to control the switch circuit to be switched on, and when the input voltage is in a high-voltage range, namely not in the preset voltage range, the controller sends a trigger signal to control the switch circuit to be switched off, so that the output voltage of the voltage doubling circuit can be ensured to be in a certain range, and the condition that the output voltage of the voltage doubling circuit is lower due to the lower input voltage of the voltage doubling circuit can be avoided; and because the output of the voltage doubling circuit is the input of the flyback circuit, the input voltage of the flyback circuit is correspondingly not lowered because the alternating current power supply signal is in a low-voltage interval, and the condition that the flyback circuit is low in efficiency is not caused. Therefore, the on-off of the switch circuit is controlled according to the input voltage, so that the output voltage of the voltage doubling circuit, namely the input voltage of the flyback circuit, is ensured not to have the condition of low voltage, the efficiencies of the flyback circuit and the charging device are greatly improved, and the small size of the charging device is facilitated.
Illustratively, the charging device further includes a first resistor and a second resistor, the first resistor is connected between the first input terminal and the controller, the second resistor is connected between the second input terminal and the controller, and the controller detects the input voltage through the first resistor and the second resistor.
Illustratively, the switching circuit includes a first switching tube and a second switching tube, and the first switching tube and the second switching tube are connected in series between the second input end and the filter circuit. It should be noted that the switching circuit may include one switching tube or a plurality of switching tubes, and the number of the switching tubes may be set according to needs, where the number of the switching tubes in the switching circuit is not limited.
It should be noted that, in the embodiment of the present invention, the first switch tube and the second switch tube may be controllable switches, such as a Bipolar Junction Transistor (BJT), a Silicon Controlled Rectifier (SCR), a Gate turn-off thyristor (GTO), a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), an Insulated Gate Bipolar Transistor (IGBT), an opto-coupler, and the like, which are not limited herein.
Illustratively, the filter circuit includes a first capacitor connected between the switch circuit and the positive output terminal of the rectifier circuit, and a second capacitor connected between the switch circuit and the negative output terminal of the rectifier circuit.
In one embodiment, referring to fig. 2, fig. 2 shows an example of a voltage doubling circuit of a charging device according to the present invention. The voltage doubler circuit 200 includes:
a first resistor R1 and a second resistor R2 connected to the power input terminal L, N for detecting the input voltage of the ac power signal; wherein the first resistor R1 is connected between the first input terminal N and the controller 240, and the second resistor R2 is connected between the second input terminal L and the controller 240;
a rectifying circuit 220, connected to the power input terminal L, N, for converting the ac power signal into a third dc power signal; the trimming circuit 220 is a diode rectifier circuit DB1, two input ends of the diode rectifier circuit DB1 are respectively connected to the first input end N and the second input end L, and two output ends of the diode rectifier circuit DB1 are respectively used as a negative output end and a negative output end of the voltage doubling circuit;
a switching circuit 230 connected to the rectifying circuit 220; the switch circuit 230 includes a first switch tube Q1 and a second switch tube Q2 connected in series, the first switch tube Q1 is connected between the second input terminal L and the second switch tube Q2, and the second switch tube Q2 is connected between the first switch tube Q1 and the filter circuit;
a controller 240 connected to the input voltage detection circuit 210 and the switch circuit 230, for controlling the on/off of the switch circuit 230 according to the input voltage; wherein, the input terminal of the controller 240 is connected to the first resistor R1 and the second resistor R2, respectively, and the output terminal of the controller 240 is connected to the control terminals of the first switch tube Q1 and the second switch tube Q2, respectively;
and a filter circuit 250 connected to the rectifier circuit 220 and the switch circuit 230 and outputting the first direct current power signal, wherein the filter circuit 250 includes a first capacitor C1 and a second capacitor C2, the first capacitor C1 is connected between the positive output terminal of the rectifier circuit 220 and the second switch tube Q2, and the second capacitor C2 is connected between the negative output terminal of the rectifier circuit 220 and the second switch tube Q2.
Illustratively, the flyback circuit includes:
an input for receiving the first direct current power supply signal;
a transformer including a primary winding and a secondary winding, the primary winding storing energy of the first DC power supply signal and being discharged by the secondary winding;
a first switch connected in series with the primary winding to the input;
a second switch connected between the secondary winding and a positive output of the flyback circuit.
Illustratively, the flyback circuit further includes a third capacitor connected in parallel with the primary winding and the first switch in series.
The flyback circuit further comprises a buffer circuit, wherein the buffer circuit is connected with the primary winding in parallel, the buffer circuit comprises a fourth capacitor, a resistor and a third switch, and the fourth capacitor and the resistor are connected in parallel and then connected with the third switch in series.
Illustratively, the flyback circuit further comprises a fifth capacitor connected in parallel between the positive output terminal and the negative output terminal of the flyback circuit.
In one embodiment, referring to fig. 3, fig. 3 illustrates an example of a flyback circuit of a charging device according to the present invention. The flyback circuit 300 includes:
the input end Vin +, Vin-is used for receiving the first direct current power supply signal;
a transformer T comprising a primary winding N1 and a secondary winding N2, the primary winding N1 storing energy of the first DC power signal and being discharged by the secondary winding N2;
a first switch K1 connected to the input in series with the primary winding N1;
a second switch K2 connected between the secondary winding N2 and the positive output terminal Vout + of the flyback circuit;
a third capacitor C3, the third capacitor C3 being connected in parallel with the primary winding N1 and the first switch K1 in series;
the buffer circuit is connected with the primary winding N1 in parallel, the buffer circuit comprises a fourth capacitor C4, a resistor R and a third switch K3, and the fourth capacitor C4 and the resistor R are connected in parallel and then connected with the third switch K3 in series.
A fifth capacitor C5, wherein the fifth capacitor C5 is connected in parallel between the positive output terminal Vout + and the negative output terminal Vout-of the flyback circuit.
It should be noted that the first switch, the second switch, and the third switch in the embodiment of the present invention may be controllable switches, such as a Bipolar Junction Transistor (BJT), a Silicon Controlled Rectifier (SCR), a Gate turn-off thyristor (GTO), a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), an Insulated Gate Bipolar Transistor (IGBT), an optical coupler, and the like; the second switch and the third switch may also be non-controllable switches, such as diodes, etc., and the first switch, the second switch and the third switch are not limited herein.
The operation principle of a charging device according to an embodiment of the present invention is described below with reference to fig. 2 and 3. The charging device comprises a power input end, a voltage doubling circuit 200 and a flyback circuit 300, and the working principle of the charging device is as follows:
the power supply input end L, N receives an alternating current power supply signal and outputs the alternating current power supply signal to the rectifying circuit DB 1;
the resistor R1 and the resistor R2 detect that the voltage of the power input terminal L, N is in a high-voltage range or a low-voltage range;
when the alternating current power supply signal is in a low-voltage interval (85Vac-150Vac), the controller sends out a trigger signal to control the switch circuit to be conducted, namely, the switch tubes Q1 and Q2 are controlled to be conducted, and at the moment, the voltage doubling circuit outputs a first direct current voltage signal (240Vdc-424 Vdc); the first direct-current voltage signal is input from the input end of the flyback circuit, and is input into a primary winding N1 of a transformer of the flyback circuit after passing through a capacitor EC1, at the moment, a switching tube Q3 is conducted, the primary winding N1 stores the energy of the first direct-current voltage signal, and the secondary side of the flyback circuit is open-circuited, namely the flyback circuit has no output; after a period of time, the switching tube Q3 is turned off, the primary side of the flyback circuit is open, the energy stored in the mutual inductance of the primary winding N1 and the secondary winding N2 is released and output through the secondary side of the flyback circuit, that is, an output signal of the flyback circuit, which can be used as a charging signal of the charging device;
when the alternating current power supply signal is in a high-voltage interval (150Vac-264Vac), the controller sends out a trigger signal to control the switching circuit to be switched off, namely the switching tubes Q1 and Q2 are controlled to be switched off, and at the moment, the voltage doubling circuit outputs a first direct current voltage signal (212Vdc-373 Vdc); the first direct-current voltage signal is input from the input end of the flyback circuit, and is input into a primary winding N1 of a transformer of the flyback circuit after passing through a capacitor EC1, at the moment, a switching tube Q3 is conducted, the primary winding N1 stores the energy of the first direct-current voltage signal, and the secondary side of the flyback circuit is open-circuited, namely the flyback circuit has no output; after a period of time, the switching tube Q3 is turned off, the primary side of the flyback circuit is open, the energy stored in the mutual inductance of the primary winding N1 and the secondary winding N2 is released and output through the secondary side of the flyback circuit, that is, an output signal of the flyback circuit, which can be used as a charging signal of the charging device;
therefore, no matter the input voltage of the charging device is in a high-voltage interval or a low-voltage interval, after the input voltage of the voltage doubling circuit is converted by the voltage doubling circuit, the output voltage of the voltage doubling circuit, namely the input voltage of the flyback circuit, is in a certain interval, and then the output voltage is converted by the flyback circuit and then is output; at the moment, the minimum input voltage of the flyback circuit is not increased, the input current is reduced, and the copper loss of the primary winding of the transformer in the flyback circuit is effectively reduced. Therefore, the wide range of the input voltage of the whole charging device is ensured, the input voltage range of the flyback circuit is narrowed, the frequency variation range is narrowed, the magnetic loss of a transformer in the flyback circuit is reduced under the condition of the same power, the efficiency of the flyback circuit is improved, the efficiency of the whole charging device is improved, the overheating condition of the charging device is solved, and the service life of the charging device is greatly prolonged.
Therefore, according to the utility model discloses a charging device promotes and stabilizes at less voltage range with the input signal of wide range through voltage doubling circuit to through flyback circuit realization high efficiency output, when having realized charging device's small size, improved charging device's efficiency, avoid charging device's the overheated condition, promote charging device's life by a wide margin.
Although the example embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above-described example embodiments are merely illustrative and are not intended to limit the scope of the present invention thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention. All such changes and modifications are intended to be included within the scope of the present invention as claimed in the appended claims.
It will be understood by those skilled in the art that all of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
The above description is only for the specific embodiments of the present invention or the description of the specific embodiments, the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. The protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A charging device, the device comprising:
a power input terminal, including a first input terminal and a second input terminal, for receiving an AC power signal;
the voltage doubling circuit is connected with the power input end and converts the alternating current power supply signal into a first direct current power supply signal;
and the flyback circuit is connected with the voltage doubling circuit and is used for converting the first direct-current power supply signal into a second direct-current power supply signal and outputting the second direct-current power supply signal.
2. The apparatus of claim 1, wherein the voltage doubling circuit comprises:
the rectifying circuit is connected to the power input end and used for converting the alternating current power supply signal into a third direct current power supply signal;
a switching circuit connected to the rectifying circuit;
the controller is connected with the power supply input end and the switch circuit and is used for detecting the input voltage of the power supply input end and controlling the on-off of the switch circuit according to the input voltage;
and the filter circuit is connected with the rectifying circuit and the switch circuit and outputs the first direct current power supply signal.
3. The apparatus of claim 2, wherein the controller controls the switching circuit to conduct when the controller detects that the input voltage is within a preset voltage range.
4. The apparatus of claim 2, wherein the switching circuit is controlled to turn off when the controller detects that the input voltage is not within a preset voltage range.
5. The apparatus of claim 3 or 4, wherein the preset voltage range comprises: 85V-150V alternating voltage.
6. The apparatus of claim 2, further comprising a first resistor and a second resistor, the first resistor coupled between the first input and the controller, the second resistor coupled between the second input and the controller, the controller sensing the input voltage through the first resistor and the second resistor.
7. The apparatus of claim 2, wherein the switching circuit comprises a first switching tube and a second switching tube, the first switching tube and the second switching tube connected in series between the second input terminal and the filtering circuit.
8. The apparatus of claim 2, wherein the filter circuit comprises a first capacitor and a second capacitor, the first capacitor being connected between the switch circuit and a positive output of the rectifier circuit, the second capacitor being connected between the switch circuit and a negative output of the rectifier circuit.
9. The apparatus of claim 1, the flyback circuit comprising:
the flyback circuit input end is used for receiving the first direct current power supply signal;
a transformer including a primary winding and a secondary winding, the primary winding storing energy of the first DC power supply signal and being discharged by the secondary winding;
a first switch connected in series with the primary winding to the input;
a second switch connected between the secondary winding and a positive output terminal of the flyback circuit;
a third capacitor connected in parallel with the primary winding and the first switch in series;
the buffer circuit is connected with the primary winding in parallel, the buffer circuit comprises a fourth capacitor, a resistor and a third switch, and the fourth capacitor is connected with the resistor in parallel and then connected with the third switch in series;
and the fifth capacitor is connected in parallel between the positive output end and the negative output end of the flyback circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023121366.4U CN214707264U (en) | 2020-12-22 | 2020-12-22 | Charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023121366.4U CN214707264U (en) | 2020-12-22 | 2020-12-22 | Charging device |
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| Publication Number | Publication Date |
|---|---|
| CN214707264U true CN214707264U (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023121366.4U Active CN214707264U (en) | 2020-12-22 | 2020-12-22 | Charging device |
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| CN (1) | CN214707264U (en) |
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