CN218449515U - Charging circuit and equipment - Google Patents
Charging circuit and equipment Download PDFInfo
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- CN218449515U CN218449515U CN202221424028.4U CN202221424028U CN218449515U CN 218449515 U CN218449515 U CN 218449515U CN 202221424028 U CN202221424028 U CN 202221424028U CN 218449515 U CN218449515 U CN 218449515U
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Abstract
The utility model discloses a charging circuit and equipment, charging circuit includes: the voltage detection module is electrically connected with the charger and used for carrying out voltage division processing on charging voltage input by the charger to obtain divided voltage, the current detection module is electrically connected with a load and used for preprocessing current generated when the load works to obtain regulated voltage, the control module is electrically connected with the voltage detection module and the current detection module and used for receiving the divided voltage and regulating the voltage, carrying out ADC (analog to digital converter) conversion on the divided voltage to obtain a detection voltage value, carrying out ADC (analog to digital converter) conversion on the regulated voltage to obtain a detection current value, and the display module is electrically connected with the control module and used for receiving the detection voltage value and the detection current value and respectively displaying the detection voltage value and the detection current value. The utility model discloses the charged state and the battery charging outfit's when can show the electronic product and charge power supply state.
Description
Technical Field
The utility model belongs to the technical field of the electronic circuit technique and specifically relates to a charging circuit and equipment are related to.
Background
When the electronic product is charged or the power supply supplies power to the device, part of the electronic products cannot display the charging state, and the user does not know the charging state of the electronic product and the power supply state of the charging device, which easily causes potential safety hazards.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a charging circuit can show the charged state when the electronic product charges and battery charging outfit's power supply state.
The utility model discloses still provide a battery charging outfit.
In a first aspect, an embodiment of the present invention provides a charging circuit, including:
the voltage detection module is electrically connected with a charger and used for carrying out voltage division processing on charging voltage input by the charger to obtain divided voltage;
the current detection module is electrically connected with a load and is used for preprocessing current generated when the load works so as to obtain regulated voltage;
the control module is electrically connected with the voltage detection module and the current detection module and is used for receiving the divided voltage and the regulated voltage, carrying out ADC (analog to digital converter) conversion on the divided voltage to obtain a detection voltage value, and carrying out ADC conversion on the regulated voltage to obtain a detection current value;
and the display module is electrically connected with the control module, receives the detection voltage value and the detection current value and respectively displays the detection voltage value and the detection current value.
The utility model discloses charging circuit has following beneficial effect at least: the voltage detection module divides charging voltage input by the charger to obtain divided voltage, the current detection module preprocesses current generated during load working to obtain adjusted voltage, the control module receives the divided voltage and the adjusted voltage, ADC (analog to digital converter) converts the divided voltage to obtain a detected voltage value, ADC converts the adjusted voltage to obtain a detected current value, the display module receives the detected voltage value and the detected current value and respectively displays the detected voltage value and the detected current value, and the charging state of an electronic product during charging and the power supply state of charging equipment can be displayed.
According to the utility model discloses a charging circuit of other embodiments, charging circuit still includes:
the quick charge protocol detection module is electrically connected with the load, the charger and the control module and is used for acquiring interface voltages of the load and the charger, dividing the interface voltages to obtain protocol voltages and outputting the protocol voltages to the control module;
the control module is also used for carrying out ADC conversion on the protocol voltage to obtain a charging protocol voltage value and outputting a control signal according to the protocol voltage;
the display module is further used for receiving the charging protocol voltage value and displaying the charging protocol voltage value;
the quick charging trigger module is electrically connected with the control module and used for acquiring the control signal and outputting trigger voltage to the charger according to the control signal; wherein the trigger voltage causes the charger to switch charging modes.
According to the utility model discloses a charging circuit of other embodiments, interface voltage includes interface positive voltage and interface negative voltage, the agreement voltage includes: agreement positive voltage and agreement negative voltage, fill agreement detection module soon and include:
a first detection unit, the first detection unit comprising: the positive voltage output port is connected with the first voltage division unit;
the positive voltage input port is electrically connected with the load, the charger and receives the interface positive voltage;
the first voltage division unit includes: the first voltage dividing resistor is electrically connected with the positive voltage input port, one end of the second voltage dividing resistor is electrically connected with the first voltage dividing resistor, and the other end of the second voltage dividing resistor is grounded and is used for carrying out voltage dividing treatment on the positive voltage of the interface to obtain the protocol positive voltage;
the positive voltage output port is arranged between the first voltage-dividing resistor and the second voltage-dividing resistor and is used for outputting the protocol positive voltage;
a second detection unit including: the negative voltage input port, the second voltage division unit and the negative voltage output port;
the negative voltage input port is used for receiving the interface negative voltage;
the second voltage division unit includes: the third voltage dividing resistor is electrically connected with the negative voltage input port, one end of the fourth voltage dividing resistor is electrically connected with the third voltage dividing resistor, and the other end of the fourth voltage dividing resistor is grounded and is used for dividing the interface negative voltage to obtain the protocol negative voltage;
the negative voltage output port is arranged between the third voltage dividing resistor and the fourth voltage dividing resistor and used for outputting the protocol negative voltage.
According to the utility model discloses a charging circuit of other embodiments, control signal includes: a first control signal, a second control signal, and a third control signal; the quick charge protocol detection module comprises:
fill agreement chip soon, fill agreement chip soon includes: a positive input port, a negative input port, a first mode input port, a second mode input port, and a third mode input port;
the positive input port and the negative input port are used for being in communication connection with the charger;
the first mode input port is electrically connected with the control module and is used for receiving the first control signal;
the second mode input port is electrically connected with the control module and used for receiving the second control signal;
the third mode input port is electrically connected with the control module and is used for receiving the third control signal;
and the quick charging protocol chip screens the trigger voltage from a preset mapping table according to the first control signal, the second control signal and the third control signal, and outputs the trigger voltage to the charger.
According to the utility model discloses a charging circuit of other embodiments, charging circuit still includes:
the temperature detection module is electrically connected with the control module and used for acquiring temperature detection voltage and transmitting the temperature detection voltage to the control module; wherein the temperature detection voltage is changed according to a temperature change;
the control module is also used for carrying out ADC (analog to digital converter) conversion on the temperature detection voltage to obtain a temperature detection voltage value;
the display module is further used for receiving the temperature detection voltage value and displaying the temperature detection voltage value.
According to the utility model discloses a charging circuit of other embodiments, voltage detection module includes:
the charger power supply port is used for receiving the charging voltage input by the charger;
a voltage dividing unit including: one end of the fifth voltage-dividing resistor is electrically connected with the power supply port of the charger, one end of the sixth voltage-dividing resistor is electrically connected with the fifth voltage-dividing resistor, and the other end of the sixth voltage-dividing resistor is grounded so as to divide the charging voltage to obtain divided voltage;
and the voltage output port is arranged between the fifth voltage-dividing resistor and the sixth voltage-dividing resistor, is electrically connected with the control module and is used for outputting the divided voltage to the control module.
According to the utility model discloses a charging circuit of other embodiments, the current detection module includes:
a flow distribution unit comprising: the device comprises a first shunt resistor and a second shunt resistor, wherein one end of the first shunt resistor is electrically connected with the load, one end of the second shunt resistor is electrically connected between the first shunt resistor and the load, and the other end of the second shunt resistor is grounded and used for shunting working current so as to reduce the shunt current flowing through the first shunt resistor and obtain shunt voltage by calculating according to the shunt current and the first shunt resistor;
and the power amplifier is electrically connected with the shunt unit and the control module, receives the shunt voltage, amplifies the shunt voltage to obtain the regulating voltage, and transmits the regulating voltage to the control module.
According to the utility model discloses a charging circuit of other embodiments, the temperature detection module includes:
the power supply receiving port is used for receiving working voltage;
a temperature detection unit including: the temperature detection circuit comprises a series resistor and a thermistor, wherein one end of the series resistor is electrically connected with the power receiving port, one end of the thermistor is electrically connected with the series resistor, and the other end of the thermistor is grounded and used for acquiring the temperature detection voltage according to the change of the temperature;
and the temperature output port is arranged between the series resistor and the thermistor and is electrically connected with the control module and used for outputting the temperature detection voltage to the control module.
According to the utility model discloses a charging circuit of other embodiments, the display module includes: and the TFT display screen is used for displaying the detection voltage value, the detection current value, the charging protocol voltage value and the temperature detection voltage value.
In a second aspect, an embodiment of the present invention provides a charging device, including:
a charger;
a charging circuit coupled to the charger, the charging circuit of the first aspect.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
Fig. 1 is a block diagram of a charging circuit according to an embodiment of the present invention;
fig. 2 is a block diagram of another embodiment of a charging circuit according to the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of the charging circuit according to the present invention.
Description of reference numerals:
the device comprises a voltage detection module 100, a current detection module 200, a control module 300 and a display module 400;
the system comprises a quick charging trigger module 500, a quick charging protocol detection module 600 and a temperature detection module 700.
Detailed Description
The conception and the resulting technical effects of the present invention will be described clearly and completely with reference to the following embodiments, so that the objects, features and effects of the present invention can be fully understood. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and other embodiments obtained by those skilled in the art without inventive labor based on the embodiments of the present invention all belong to the protection scope of the present invention.
In the description of the present invention, if an orientation description is referred to, for example, the directions or positional relationships indicated by "upper", "lower", "front", "rear", "left", "right", etc. are based on the directions or positional relationships shown in the drawings, only for convenience of description and simplification of description, and it is not intended to indicate or imply 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 limiting the present invention. If a feature is referred to as being "disposed," "secured," "connected," or "mounted" to another feature, it can be directly disposed, secured, or connected to the other feature or indirectly disposed, secured, connected, or mounted to the other feature.
In the description of the embodiments of the present invention, if "a plurality" is referred to, it means one or more, if "a plurality" is referred to, it means two or more, if "greater than", "less than" or "more than" is referred to, it is understood that the number is not included, and if "more than", "less than" or "within" is referred to, it is understood that the number is included. If reference is made to "first" or "second", this should be understood to distinguish between features and not to indicate or imply relative importance or to implicitly indicate the number of indicated features or to implicitly indicate the precedence of the indicated features.
Referring to fig. 1, one embodiment of the present invention discloses a charging circuit. The charging circuit includes: the voltage detection module 100, the current detection module 200, the control module 300 and the display module 400 are all electrically connected.
The voltage detection module 100 is electrically connected to the charger, and configured to divide the charging voltage input by the charger to obtain a divided voltage. The current detection module 200 is electrically connected to the load, and is configured to pre-process a current generated when the load operates, so as to obtain a regulated voltage. The control module 300 is electrically connected to the voltage detection module 100 and the current detection module 200, and is configured to receive the divided voltage and the regulated voltage, perform ADC conversion on the divided voltage to obtain a detected voltage value, and perform ADC conversion on the regulated voltage to obtain a detected current value. The display module 400 is electrically connected to the control module 300, receives the detected voltage value and the detected current value, and displays the detected voltage value and the detected current value respectively.
The voltage detection module 100 divides the charging voltage input by the charger to obtain a divided voltage, and outputs the divided voltage to the control module 300, and the current detection module 200 preprocesses the current generated by the load during operation to obtain an adjusted voltage, and outputs the adjusted voltage to the control module 300. The control module 300 receives the divided voltage and the adjusted voltage, performs ADC conversion on the divided voltage to obtain a detected voltage value, performs ADC conversion on the adjusted voltage to obtain a detected current value, and outputs the detected voltage value and the detected current value to the display module 400, respectively. The display module 400 receives the detected voltage value and the detected current value, respectively displays the detected voltage value and the detected current value, and can display the charging state of the electronic product during charging and the power supply state of the charging device.
The load is an electronic device such as a mobile phone, a tablet, and an electronic watch, and the load is not specifically limited in this application.
Referring to fig. 2, one embodiment of the present invention discloses a charging circuit. The charging circuit further includes: the system comprises a quick charging trigger module 500, a quick charging protocol detection module 600 and a temperature detection module 700, wherein the quick charging trigger module 500, the quick charging protocol detection module 600 and the temperature detection module 700 are all electrically connected.
Referring to fig. 2, in the embodiment of the present invention, the protocol detection module 600 is electrically connected to the load, the charger and the control module 300, and is configured to obtain the interface voltage of the load and the charger, divide the interface voltage to obtain the protocol voltage, and output the protocol voltage to the control module 300. The control module 300 is further configured to perform ADC conversion on the protocol voltage to obtain a charging protocol voltage value, and output a control signal according to the protocol voltage. The display module 400 is further configured to receive the charging protocol voltage value and display the charging protocol voltage value. The fast charging trigger module 500 is electrically connected to the control module 300, and is configured to obtain a control signal and output a trigger voltage to the charger according to the control signal.
The rapid charging protocol detection module 600 obtains interface voltages of the load and the charger, divides the interface voltages to obtain a protocol voltage, and outputs the protocol voltage to the control module 300. The control module 300 performs ADC conversion on the protocol voltage to obtain a charging protocol voltage value, and inputs the charging protocol voltage value to the display module 400. The display module 400 receives the charging protocol voltage value and displays the charging protocol voltage value. The control module 300 outputs a control signal to the fast charging trigger module 500 according to the protocol voltage, and the fast charging trigger module 500 outputs a trigger voltage to the charger according to the control signal.
It should be noted that the interface voltage is the voltage to ground of the two data lines D + and D-and is used for determining the fast charging protocol that can be supported by the load terminal. Wherein the trigger voltage causes the charger to switch charging modes.
Referring to fig. 3, in an embodiment of the present invention, the interface voltage includes an interface positive voltage and an interface negative voltage, and the protocol voltage includes: protocol positive voltage and protocol negative voltage. The rapid charging protocol detection module 600 includes:
the first detection unit includes: the voltage divider comprises a positive voltage input port, a first voltage division unit and a positive voltage output port. The positive voltage input port is electrically connected to the load, the charger and receives an interface positive voltage. The first voltage division unit includes: the first divider resistor is electrically connected with the positive voltage input port, one end of the second divider resistor is electrically connected with the first divider resistor, and the other end of the second divider resistor is grounded and used for carrying out voltage division processing on the positive voltage of the interface so as to obtain a protocol positive voltage. The positive voltage output port is arranged between the first voltage-dividing resistor and the second voltage-dividing resistor and used for outputting protocol positive voltage.
The second detection unit includes: the voltage divider comprises a negative voltage input port, a second voltage division unit and a negative voltage output port. The negative voltage input port is used for receiving interface negative voltage. The second voltage division unit includes: the third voltage dividing resistor is electrically connected with the negative voltage input port, one end of the fourth voltage dividing resistor is electrically connected with the third voltage dividing resistor, and the other end of the fourth voltage dividing resistor is grounded and used for carrying out voltage dividing processing on the interface negative voltage so as to obtain a protocol negative voltage. The negative voltage output port is arranged between the third voltage dividing resistor and the fourth voltage dividing resistor and used for outputting protocol negative voltage.
The first detection unit is used for detecting interface positive voltage of the interface voltage, and the second detection unit is used for detecting interface negative voltage of the interface voltage. The positive voltage input port receives the interface positive voltage, the first divider resistor and the second divider resistor, and performs voltage division processing on the interface positive voltage to obtain a protocol positive voltage, and the positive voltage output port outputs the protocol positive voltage to the control module 300. The negative voltage input port receives the interface negative voltage, the third voltage dividing resistor and the fourth voltage dividing resistor, and divides the interface positive voltage to obtain a protocol negative voltage, and the negative voltage output port outputs the protocol negative voltage to the control module 300.
It should be noted that the positive voltage input port is the port D + in fig. 3, the positive voltage output port is the port D + DET in fig. 3, the first voltage dividing resistor is the resistor R16 in fig. 3, and the second voltage dividing resistor is the resistor R17 in fig. 3; the negative voltage input port is the port D in fig. 3, the positive voltage output port is the port D-DET in fig. 3, the third voltage dividing resistor is the resistor R18 in fig. 3, and the fourth voltage dividing resistor is the resistor R19 in fig. 3.
Referring to fig. 3, in an embodiment of the present invention, the control signal includes: a first control signal, a second control signal, and a third control signal. The rapid charging protocol detection module 600 includes:
the protocol chip of filling soon includes: a positive input port, a negative input port, a first mode input port, a second mode input port, and a third mode input port. The positive input port and the negative input port are used for being in communication connection with the charger. The first mode input port is electrically connected to the control module 300 for receiving a first control signal. And the quick charging protocol chip screens out the trigger voltage from a preset mapping table according to the first control signal, the second control signal and the third control signal, and outputs the trigger voltage to the charger.
It should be noted that the fast charge protocol chip is the chip U2 in fig. 3, the positive input port is connected to the fourth pin of the fast charge protocol chip, the negative input port is connected to the fifth pin of the fast charge protocol chip, the first mode input port is connected to the second pin of the fast charge protocol chip, the second mode input port is connected to the third pin of the fast charge protocol chip, and the third mode input port is connected to the ninth pin of the fast charge protocol chip.
The preset mapping table is shown in table 1:
TABLE 1
| Trigger voltage | A first control signal | The second control signal | Third control signal |
| 5V | GND | GND | V3 |
| 9V | GND | GND | GND |
| 12V | GND | V3 | GND |
| 15V | V3 | V3 | GND |
| 20V | V3 | GND | GND |
The quick charge protocol detection module 600 is a PD/QC quick charge trigger circuit, and a PD/QC protocol chip is disposed in the PD/QC quick charge charger. The trigger voltages supported by the rapid charging protocol detection module 600 include 5V, 9V, 12V, 15V, 20V, and the like, and the trigger voltages are not specifically limited in this application. In the default state of the charger, only 5V voltage is output, and only when a quick charging protocol is started, the charger outputs voltage more than 9V.
To start the fast charge protocol, a receiving end protocol chip is required, a fast charge protocol detection module 600 is built in, and the receiving end protocol chip can output the required trigger voltage to supply power to a load by handshake communication with a power supply end through a CC1 port and a CC2 port or handshake communication through a D + port and a D-port and control the output of a first control signal, a second control signal and a third control signal through a control module 300. The power supply terminal includes a charger, a power supply or a quick-charging charger, and the like, and is not specifically limited in this application.
Referring to fig. 2, in an embodiment of the present invention, the charging circuit further includes:
the temperature detection module 700 is electrically connected to the control module 300, and is configured to obtain a temperature detection voltage and transmit the temperature detection voltage to the control module 300. The control module 300 is further configured to perform ADC conversion on the temperature detection voltage to obtain a temperature detection voltage value. The display module 400 is further configured to receive the temperature detection voltage value and display the temperature detection voltage value.
Note that the temperature detection voltage changes according to a change in temperature.
Referring to fig. 3, in an embodiment of the present invention, the voltage detection module 100 includes:
the charger power supply port is used for receiving charging voltage input by the charger. The voltage dividing unit includes: the charger comprises a fifth voltage-dividing resistor and a sixth voltage-dividing resistor, wherein one end of the fifth voltage-dividing resistor is electrically connected with a power supply port of the charger, one end of the sixth voltage-dividing resistor is electrically connected with the fifth voltage-dividing resistor, and the other end of the sixth voltage-dividing resistor is grounded so as to divide the charging voltage to obtain divided voltage. The voltage output port is disposed between the fifth voltage-dividing resistor and the sixth voltage-dividing resistor, and the voltage output port is electrically connected to the control module 300 and configured to output the divided voltage to the control module 300.
The charging voltage of the charger is input to the voltage detection module 100 through the power port of the charger, divided by the fifth voltage-dividing resistor and the sixth voltage-dividing resistor to obtain a divided voltage, and the divided voltage is output to the control module 300.
It should be noted that the power supply port of the charger is the port VBUS in fig. 3, the fifth voltage-dividing resistor is R4 in fig. 3, the sixth voltage-dividing resistor is R5 in fig. 3, and the voltage output port is the port VOL-DET in fig. 3.
Referring to fig. 3, in an embodiment of the present invention, the current detection module 200 includes:
the shunting unit includes: the device comprises a first shunt resistor and a second shunt resistor, wherein one end of the first shunt resistor is electrically connected with a load, one end of the second shunt resistor is electrically connected between the first shunt resistor and the load, the other end of the second shunt resistor is grounded and used for shunting the working current so as to reduce the shunt current flowing through the first shunt resistor, and the shunt current and the first shunt resistor are calculated to obtain shunt voltage. The power amplifier is electrically connected to the shunt unit and the control module 300, receives the shunt voltage, amplifies the shunt voltage to obtain a regulated voltage, and transmits the regulated voltage to the control module 300.
The load is connected to the ground terminal of the charger through the second shunt resistor, the load generates current when working, the second shunt resistor converts the current into extremely small shunt voltage, the shunt voltage is input to the power amplifier through the first shunt resistor, the power amplifier amplifies 18 times, and the shunt voltage is filtered and transmitted to the control module 300 through the resistor R11 and the capacitor C5. The power amplifier is preferably a unidirectional power amplifier LM321MF, which is not specifically limited in this application.
It should be noted that the first shunt resistor is the resistor R12 in fig. 3, the second shunt resistor is the resistor R1 in fig. 3, and the power amplifier is the chip U1 in fig. 3.
Referring to fig. 3, in an embodiment of the present invention, the temperature detection module 700 includes:
the power receiving port is used for receiving the working voltage. The temperature detection unit includes: the temperature detection circuit comprises a series resistor and a thermistor, wherein one end of the series resistor is electrically connected with a power receiving port, one end of the thermistor is electrically connected with the series resistor, and the other end of the thermistor is grounded and used for acquiring temperature detection voltage according to temperature change. And the temperature output port is arranged between the series resistor and the thermistor and is electrically connected with the control module 300 and used for outputting temperature detection voltage to the control module 300.
The temperature detection module 700 detects the temperature of the whole charging circuit, the 3.3V voltage enters the temperature detection module 700 through the power receiving port, the series resistor and the thermistor divide the 3.3V voltage to obtain the temperature detection voltage, and the temperature detection voltage is output to the control module 300 through the temperature output port.
It should be noted that the power receiving port is the +3.3V port in fig. 3, the series resistor is the resistor R6 in fig. 3, the thermistor is the resistor R7 in fig. 3, and the temperature output port is the TEMP-DET port in fig. 3.
In an embodiment of the present invention, the display module 400 includes: and the TFT display screen is used for displaying the detection voltage value, the detection current value, the charging protocol voltage value and the temperature detection voltage value.
The control module 300 inputs the display detection voltage value, the detection current value, the charging protocol voltage value and the temperature detection voltage value to the display module 400, and the display module 400 displays the display detection voltage value, the detection current value, the charging protocol voltage value and the temperature detection voltage value in real time through the TFT display screen.
Additionally, an embodiment of the utility model discloses a charging device, charging device includes: the charging circuit is connected with the charger and can display the charging state of the electronic product during charging and the power supply state of the charging equipment.
The above-described embodiments of the apparatus are merely illustrative, wherein the units illustrated as separate components may or may not be physically separate, i.e. may be located in one place, or may also be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict.
Claims (10)
1. A charging circuit, comprising:
the voltage detection module is electrically connected with a charger and is used for carrying out voltage division processing on charging voltage input by the charger to obtain divided voltage;
the current detection module is electrically connected with a load and is used for preprocessing current generated when the load works so as to obtain regulated voltage;
the control module is electrically connected with the voltage detection module and the current detection module and is used for receiving the divided voltage and the regulated voltage, carrying out ADC (analog to digital converter) conversion on the divided voltage to obtain a detected voltage value, and carrying out ADC conversion on the regulated voltage to obtain a detected current value;
and the display module is electrically connected with the control module, receives the detection voltage value and the detection current value and respectively displays the detection voltage value and the detection current value.
2. The charging circuit of claim 1, further comprising:
the rapid charging protocol detection module is electrically connected with the load, the charger and the control module, and is used for acquiring interface voltages of the load and the charger, dividing the interface voltages to obtain protocol voltages and outputting the protocol voltages to the control module;
the control module is also used for carrying out ADC conversion on the protocol voltage to obtain a charging protocol voltage value and outputting a control signal according to the protocol voltage;
the display module is further used for receiving the charging protocol voltage value and displaying the charging protocol voltage value;
the quick charging trigger module is electrically connected with the control module and used for acquiring the control signal and outputting a trigger voltage to the charger according to the control signal; wherein the trigger voltage causes the charger to switch charging modes.
3. The charging circuit of claim 2, wherein the interface voltage comprises an interface positive voltage and an interface negative voltage, and wherein the protocol voltage comprises: agreement positive voltage and agreement negative voltage, fill agreement detection module soon and include:
a first detection unit, the first detection unit comprising: the positive voltage output port is connected with the first voltage division unit;
the positive voltage input port is electrically connected with the load, the charger and receives the interface positive voltage;
the first voltage division unit includes: the first voltage dividing resistor is electrically connected with the positive voltage input port, one end of the second voltage dividing resistor is electrically connected with the first voltage dividing resistor, and the other end of the second voltage dividing resistor is grounded and is used for carrying out voltage dividing treatment on the positive voltage of the interface to obtain the protocol positive voltage;
the positive voltage output port is arranged between the first voltage-dividing resistor and the second voltage-dividing resistor and is used for outputting the protocol positive voltage;
a second detection unit including: the negative voltage input port, the second voltage division unit and the negative voltage output port;
the negative voltage input port is used for receiving the interface negative voltage;
the second voltage division unit includes: the third voltage dividing resistor is electrically connected with the negative voltage input port, one end of the fourth voltage dividing resistor is electrically connected with the third voltage dividing resistor, and the other end of the fourth voltage dividing resistor is grounded and is used for dividing the interface negative voltage to obtain the protocol negative voltage;
the negative voltage output port is arranged between the third voltage dividing resistor and the fourth voltage dividing resistor and used for outputting the protocol negative voltage.
4. The charging circuit of claim 2, wherein the control signal comprises: a first control signal, a second control signal, and a third control signal; the protocol detection module that fills soon includes:
fill agreement chip soon, fill agreement chip soon includes: a positive input port, a negative input port, a first mode input port, a second mode input port, and a third mode input port;
the positive input port and the negative input port are used for being in communication connection with the charger;
the first mode input port is electrically connected with the control module and is used for receiving the first control signal;
the second mode input port is electrically connected with the control module and used for receiving the second control signal;
the third mode input port is electrically connected with the control module and is used for receiving the third control signal;
and the quick charging protocol chip screens the trigger voltage from a preset mapping table according to the first control signal, the second control signal and the third control signal, and outputs the trigger voltage to the charger.
5. The charging circuit of claim 2, further comprising:
the temperature detection module is electrically connected with the control module and used for acquiring temperature detection voltage and transmitting the temperature detection voltage to the control module; wherein the temperature detection voltage is changed according to a temperature change;
the control module is also used for carrying out ADC conversion on the temperature detection voltage to obtain a temperature detection voltage value;
the display module is further used for receiving the temperature detection voltage value and displaying the temperature detection voltage value.
6. The charging circuit of claim 1, wherein the voltage detection module comprises:
the charger power supply port is used for receiving the charging voltage input by the charger;
a voltage dividing unit including: one end of the fifth voltage-dividing resistor is electrically connected with the power supply port of the charger, one end of the sixth voltage-dividing resistor is electrically connected with the fifth voltage-dividing resistor, and the other end of the sixth voltage-dividing resistor is grounded so as to divide the charging voltage to obtain divided voltage;
and the voltage output port is arranged between the fifth voltage-dividing resistor and the sixth voltage-dividing resistor, and is electrically connected with the control module and used for outputting the divided voltage to the control module.
7. The charging circuit of claim 1, wherein the current detection module comprises:
a shunting unit, the shunting unit comprising: the device comprises a first shunt resistor and a second shunt resistor, wherein one end of the first shunt resistor is electrically connected with the load, one end of the second shunt resistor is electrically connected between the first shunt resistor and the load, and the other end of the second shunt resistor is grounded and used for shunting working current so as to reduce the shunt current flowing through the first shunt resistor and obtain shunt voltage by calculating according to the shunt current and the first shunt resistor;
and the power amplifier is electrically connected with the shunt unit and the control module, receives the shunt voltage, amplifies the shunt voltage to obtain the regulating voltage, and transmits the regulating voltage to the control module.
8. The charging circuit of claim 5, wherein the temperature detection module comprises:
the power supply receiving port is used for receiving working voltage;
a temperature detection unit including: the temperature detection circuit comprises a series resistor and a thermistor, wherein one end of the series resistor is electrically connected with the power receiving port, one end of the thermistor is electrically connected with the series resistor, and the other end of the thermistor is grounded and used for acquiring the temperature detection voltage according to the change of the temperature;
and the temperature output port is arranged between the series resistor and the thermistor, is electrically connected with the control module and is used for outputting the temperature detection voltage to the control module.
9. The charging circuit of claim 5, wherein the display module comprises: and the TFT display screen is used for displaying the detection voltage value, the detection current value, the charging protocol voltage value and the temperature detection voltage value.
10. A charging device, comprising:
a charger;
a charging circuit connected to the charger, the charging circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221424028.4U CN218449515U (en) | 2022-06-09 | 2022-06-09 | Charging circuit and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221424028.4U CN218449515U (en) | 2022-06-09 | 2022-06-09 | Charging circuit and equipment |
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| Publication Number | Publication Date |
|---|---|
| CN218449515U true CN218449515U (en) | 2023-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221424028.4U Active CN218449515U (en) | 2022-06-09 | 2022-06-09 | Charging circuit and equipment |
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| Country | Link |
|---|---|
| CN (1) | CN218449515U (en) |
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- 2022-06-09 CN CN202221424028.4U patent/CN218449515U/en active Active
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