CN218586914U - Charging device - Google Patents
Charging device Download PDFInfo
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- CN218586914U CN218586914U CN202222243726.0U CN202222243726U CN218586914U CN 218586914 U CN218586914 U CN 218586914U CN 202222243726 U CN202222243726 U CN 202222243726U CN 218586914 U CN218586914 U CN 218586914U
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Abstract
The utility model relates to a charging device, which comprises a charging interface, a current sampling circuit, an analog-to-digital conversion circuit, a relay control circuit and a power supply module which are connected in sequence, wherein the charging interface is used for being connected with charging equipment; the utility model provides a charging device, can realize the disconnection to power module based on hardware circuit completely to, the output after the analog-to-digital conversion circuit of input current through charging device's analog-to-digital conversion circuit can reflect whether charging device is full of the electricity, and automatic control power module's disconnection when being full of the electricity can improve user's the experience of charging.
Description
Technical Field
The utility model relates to a charging circuit technical field especially relates to a charging device.
Background
The existing charging device usually determines that the power supply module is automatically powered off based on the charging time, for example, the preset charging time is 1 hour, and then the power supply module can be automatically powered off after charging for 1 hour. However, the manner of automatically powering off the power supply module based on the charging time has the following problems: the charging time is judged by matching with a software method, and whether the charging equipment is fully charged or not can not be accurately judged in the charging process based on the preset charging time, so that the user experience is poor.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problem of charging device in the prior art, the utility model provides a charging device.
In order to solve the technical problem, the utility model provides a charging device, which comprises a charging interface, a current sampling circuit, an analog-to-digital conversion circuit, a relay control circuit and a power supply module which are connected in sequence, wherein the charging interface is used for being connected with charging equipment;
when the output level of the analog-to-digital conversion circuit is low level, the power supply module is characterized to be in a connection state, and when the output level of the analog-to-digital conversion circuit is high level, the power supply module is controlled to be disconnected through the relay control circuit.
The utility model provides a pair of charging device's beneficial effect is: when the charging device is used, the charging equipment is charged through the charging interface, the input current is amplified through the current sampling circuit, the amplified current is converted into a digital signal through the analog-to-digital conversion circuit, the relay control circuit controls the power supply module to be switched off according to the digital signal, when the output level of the analog-to-digital conversion circuit is low level, the power supply module is represented to be in a switched-on state, when the output level of the analog-to-digital conversion circuit is high level, the power supply module is controlled to be switched off through the relay control circuit, the power supply module can be switched off completely based on a hardware circuit through the charging device, in addition, the output of the input current after passing through the analog-to-digital conversion circuit of the charging device can reflect whether the charging equipment is fully charged, the power supply module is automatically controlled to be switched off when the charging equipment is fully charged, and the charging experience of a user can be improved.
On the basis of the technical scheme, the utility model discloses a charging device can also do following improvement.
Further, the analog-to-digital conversion circuit is an inverter circuit.
The beneficial effect of adopting the further scheme is that: the input current can be amplified by the inverter circuit, and the phase of the input signal can be inverted by 180 degrees.
Furthermore, the phase inverter circuit comprises a first resistor, a first triode and a second resistor, wherein the first resistor is respectively connected with the output end of the current sampling circuit and the base electrode of the first triode, the emitting electrode of the first triode is grounded, the second resistor is respectively connected with the power supply and the collecting electrode of the first triode, and the collecting electrode of the first triode and the corresponding end point between the second resistors are the output end of the phase inverter circuit.
The beneficial effect of adopting the further scheme is that: in the inverter circuit, the current input into the inverter circuit is judged through the first triode, namely whether charging of the charging equipment is completed or not is judged, and the circuit is simple and convenient to realize.
Further, the relay control circuit comprises a photoelectric coupler, a second triode and a relay which are sequentially connected, wherein the photoelectric coupler is respectively connected with the output end of the analog-to-digital conversion circuit and the base of the second triode, the emitting electrode of the second triode is grounded, and the relay is respectively connected with the collector of the second triode and the power supply module.
The beneficial effect of adopting the further scheme is that: and the photoelectric coupler is used as a switch for controlling the disconnection of the power supply module, so that the circuit is simple and is convenient to realize.
Further, the current sampling circuit comprises a charging current input port, a charging current output port, an operational amplifier, a sampling resistor and a filter capacitor;
the charging current input port is connected with the charging equipment, the charging current input port and the charging current output port are respectively connected with the sampling resistor, the sampling resistor is respectively connected with the inverting input end and the positive input end of the operational amplifier, the output end of the operational amplifier is connected with the analog-to-digital conversion circuit, the power supply voltage end of the operational amplifier is connected with one end of the filter capacitor, and the other end of the filter capacitor is grounded.
The beneficial effect of adopting the further scheme is that: the current sampling circuit is low in cost and convenient to realize.
Further, the current sampling circuit further comprises a filter circuit, and the output end of the operational amplifier is connected with the analog-to-digital conversion circuit through the filter circuit.
The beneficial effect of adopting the further scheme is that: the current sampling circuit further comprises a filter circuit, and the current input to the charging device is filtered through the filter circuit, so that the power supply module can be controlled to be disconnected more accurately.
Further, the filter circuit comprises a third resistor and a first capacitor, one end of the third resistor is connected with the output end of the operational amplifier, the other end of the third resistor is connected with one end of the first capacitor, and the other end of the first capacitor is grounded.
The beneficial effect of adopting the further scheme is that: the filter circuit is composed of the resistor and the capacitor, and is simple and convenient to implement.
Furthermore, the power supply module comprises a live wire of an external power supply, and the live wire is connected with a relay in the relay control circuit.
The beneficial effect of adopting the further scheme is that: the relay is connected with a live wire of an external power supply in the power supply module, and the power supply module can be directly controlled to be disconnected.
Drawings
To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described with reference to the accompanying drawings and embodiments.
Fig. 1 is a schematic structural diagram of a charging device according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a current sampling circuit according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an analog-to-digital conversion circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a relay control circuit according to an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a photoelectric coupler U2 according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another charging device according to an embodiment of the present invention.
Reference numerals are as follows: the charging system comprises a charging interface 1, a current sampling circuit 2, an analog-to-digital conversion circuit 3, a relay control circuit 4 and a power supply module 5.
Detailed Description
The following examples are further to explain and supplement the present invention, and do not constitute any limitation to the present invention.
A charging device according to an embodiment of the present invention is described below with reference to the drawings.
As shown in fig. 1, a charging device according to an embodiment of the present invention includes a charging interface 1, a current sampling circuit 2, an analog-to-digital conversion circuit 3, a relay control circuit 4, and a power supply module 5, which are connected in sequence, where the charging interface 1 is used for being connected with a charging device;
when the output level of the analog-to-digital conversion circuit 3 is a low level, the power supply module 5 is characterized to be in a switch-on state, and when the output level of the analog-to-digital conversion circuit 3 is a high level, the relay control circuit 4 controls the power supply module 5 to be switched off.
When the charging device is used, charging equipment is charged through the charging interface 1, input current is amplified through the current sampling circuit 2, the amplified current is converted into a digital signal through the analog-to-digital conversion circuit 3, the relay control circuit 4 controls the power supply module 5 to be switched off according to the digital signal, when the output level of the analog-to-digital conversion circuit 3 is low level, the power supply module 5 is represented to be in a switched-on state, when the output level of the analog-to-digital conversion circuit 3 is high level, the relay control circuit 4 controls the power supply module 5 to be switched off, the power supply module 5 can be switched off completely based on a hardware circuit through the charging device, in addition, the output of the input current after passing through the analog-to-digital conversion circuit 3 of the charging device can reflect whether the charging equipment is fully charged, the power supply module 5 is automatically controlled to be switched off when the charging device is fully charged, and the charging experience of a user can be improved.
When the current collected by the current sampling circuit 2 (the current collected at the charging interface 1) is close to 0, the output level of the analog-to-digital conversion circuit 3 is at a high level, the power supply module 5 is controlled to be switched on, when the output level of the analog-to-digital conversion circuit 3 is at a high level, the power supply module 5 is controlled to be switched off by the relay control circuit 4, and when the current collected by the current sampling circuit 2 is not 0, the output level of the analog-to-digital conversion circuit 3 is at a low level, the power supply module 5 is in a switched-on state.
Optionally, referring to the schematic diagram of the current sampling circuit shown in fig. 2, the current sampling circuit 2 includes a charging current input port CN1, a charging current output port CN3, an operational amplifier U1, a sampling resistor R5, and a filter capacitor C2;
the charging current input port CN1 is connected to the charging device, the charging current input port CN1 and the charging current output port CN3 are respectively connected to the sampling resistor R5, the sampling resistor R5 is respectively connected to the inverting input terminal IN-and the non-inverting input terminal IN + of the operational amplifier, the output terminal OUT of the operational amplifier U1 is connected to the analog-to-digital conversion circuit, the power supply voltage terminal VS of the operational amplifier is connected to one end of the filter capacitor C2, and the other end of the filter capacitor C2 is grounded.
Optionally, the current sampling circuit 2 further includes a filter circuit, and an output end of the operational amplifier is connected to the analog-to-digital conversion circuit through the filter circuit.
Optionally, the filter circuit includes a third resistor R2 and a first capacitor C1, one end of the third resistor R2 is connected to the output end OUT of the operational amplifier, the other end of the third resistor R2 is connected to one end of the first capacitor C1, and the other end of the first capacitor C1 is grounded.
Referring to fig. 2, the output terminal of the current sampling circuit 2 is AD1. The values of the parameters and the types of the components in fig. 2 are only examples, and do not limit the protection scope of the present application.
Optionally, the analog-to-digital conversion circuit 3 is an inverter circuit. The input current can be amplified by the inverter circuit, and the phase of the input signal can be inverted by 180 degrees.
Optionally, referring to the circuit shown in fig. 3, the inverter circuit includes a first resistor R63, a first transistor Q15 and a second resistor R61, the first resistor R63 is connected to the output terminal AD1 of the current sampling circuit and the base of the first transistor, the emitter of the first transistor is grounded, the second resistor R61 is connected to the power source VCC and the collector of the first transistor, and the corresponding end point between the collector of the first transistor and the second resistor R61 is the output terminal of the inverter circuit and is represented by K _ Control.
Based on the charging device of the application, when the charging is automatically stopped or the charging is fully charged, the sampling voltage on the sampling resistor R5 is close to 0V, and at the moment, the voltage output by the output end AD1 of the current sampling circuit is close to 0V, and K _controlis at a high level. The parameters and the types of components shown in fig. 3 are examples, and do not limit the scope of the present application.
Optionally, the power supply module 5 may be an external power supply.
Optionally, referring to the circuit diagram shown in fig. 4, the relay control circuit 4 includes a photocoupler U2, a second triode Q1 and a relay K1 which are connected in sequence, the photocoupler U2 is respectively connected with the output end of the analog-to-digital conversion circuit 3 and the base of the second triode Q1, the emitter of the second triode Q1 is grounded, and the relay K1 is respectively connected with the collector of the second triode Q1 and the power supply module CN 2.
The LED street lamp also comprises a resistor R4, a resistor R3, a resistor R6, an LED lamp LED1 and other components in the figure 4, and a power supply module CN2 is connected with the input and the output of a live wire of a mains supply. The photoelectric coupler U2 comprises a light emitting diode and a phototriode, one end of the light emitting diode is connected with the output end of the analog-to-digital conversion circuit 3, the other end of the light emitting diode is grounded (GND 1), one end of the phototriode is connected with the base electrode of the second triode Q1, and the other end of the phototriode is grounded (CND 2).
Optionally, referring to fig. 5, the other end of the light emitting diode may be connected to a resistor R8 before the ground (GND 1), and the resistor R8 may be used to distinguish an analog ground from a digital ground, so as to reduce mutual interference between signals.
Optionally, the charging device may be a shared charging device, the shared charging device may include a two-dimensional code, the two-dimensional code includes the identity information of the charging device, and a user may initiate a charging request to the charging device through the two-dimensional code, that is, start the charging device to charge.
Based on the circuits shown in fig. 1 to 6, the working principle of the present application is as follows: the current sampling circuit 2 (current AD sampling shown in fig. 6) collects current at the charging interface 1, the charging state of the charging device is reflected by the magnitude of the current, when the current corresponding to the current sampling circuit 1 is 0, the current passes through the analog-to-digital conversion circuit 3 (signal processing shown in fig. 6), and then the output voltage K _ Control of the analog-to-digital conversion circuit 3 is obtained, when the level corresponding to K _ Control is high, the light emitting diode of the optoelectronic coupler U2 emits light, pins 3 and 4 of the optoelectronic coupler are turned on, at this time, the second triode Q1 is turned off, the voltages of pins 1 and 8 of the Control coil 1 of the relay K1 are 0v, and ledd 1 does not emit light, the relay K1 is turned off due to default pins 5 and 7, and the live wire input and output of the power supply module CN2 are turned off (the Control process corresponds to the relay Control AC220 charging shown in fig. 6).
When the level corresponding to the K _ Control is low level, the light emitting diode of the photoelectric coupler U2 does not emit light, pins 3 and 4 of the photoelectric coupler U2 are disconnected, the second triode Q1 is closed, the voltages of pins 1 and 8 of the Control coil of the relay K1 are 12V, LED1 emits light, pins 5 and 7 of the relay K1 are closed, and the input and output of the live line of the mains supply of the power supply module CN2 are connected.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (8)
1. A charging device, comprising: the charging interface, the current sampling circuit, the analog-to-digital conversion circuit, the relay control circuit and the power supply module are sequentially connected, and the charging interface is used for being connected with charging equipment;
when the output level of the analog-to-digital conversion circuit is low level, the power supply module is characterized to be in a connection state, and when the output level of the analog-to-digital conversion circuit is high level, the power supply module is controlled to be disconnected through the relay control circuit.
2. The apparatus of claim 1, wherein the analog-to-digital conversion circuit is an inverter circuit.
3. The apparatus of claim 2, wherein the inverter circuit comprises a first resistor, a first transistor, and a second resistor, the first resistor is connected to the output of the current sampling circuit and the base of the first transistor, respectively, the emitter of the first transistor is grounded, the second resistor is connected to the power supply and the collector of the first transistor, respectively, and the corresponding end point between the collector of the first transistor and the second resistor is the output of the inverter circuit.
4. The device according to any one of claims 1 to 3, wherein the relay control circuit comprises a photoelectric coupler, a second triode and a relay which are connected in sequence, the photoelectric coupler is respectively connected with the output end of the analog-to-digital conversion circuit and the base electrode of the second triode, the emitter electrode of the second triode is grounded, and the relay is respectively connected with the collector electrode of the second triode and the power supply module.
5. The apparatus of any one of claims 1 to 3, wherein the current sampling circuit comprises a charging current input port, a charging current output port, an operational amplifier, a sampling resistor, and a filter capacitor;
the charging current input port is connected with the charging equipment, the charging current input port and the charging current output port are respectively connected with the sampling resistor, the sampling resistor is respectively connected with the inverting input end and the positive phase input end of the operational amplifier, the output end of the operational amplifier is connected with the analog-to-digital conversion circuit, the power supply voltage end of the operational amplifier is connected with one end of the filter capacitor, and the other end of the filter capacitor is grounded.
6. The apparatus of claim 5, wherein the current sampling circuit further comprises a filter circuit, and wherein the output of the operational amplifier is connected to the analog-to-digital conversion circuit through the filter circuit.
7. The apparatus of claim 6, wherein the filter circuit comprises a third resistor and a first capacitor, one end of the third resistor is connected to the output terminal of the operational amplifier, the other end of the third resistor is connected to one end of the first capacitor, and the other end of the first capacitor is grounded.
8. The device of any one of claims 1 to 3, wherein the power supply module is an external power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222243726.0U CN218586914U (en) | 2022-08-25 | 2022-08-25 | Charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222243726.0U CN218586914U (en) | 2022-08-25 | 2022-08-25 | Charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218586914U true CN218586914U (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222243726.0U Active CN218586914U (en) | 2022-08-25 | 2022-08-25 | Charging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218586914U (en) |
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2022
- 2022-08-25 CN CN202222243726.0U patent/CN218586914U/en active Active
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