CN107612066B - Charging circuit, intelligent terminal and charging management method thereof - Google Patents
Charging circuit, intelligent terminal and charging management method thereof Download PDFInfo
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- CN107612066B CN107612066B CN201710844594.8A CN201710844594A CN107612066B CN 107612066 B CN107612066 B CN 107612066B CN 201710844594 A CN201710844594 A CN 201710844594A CN 107612066 B CN107612066 B CN 107612066B
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Abstract
The invention discloses a charging circuit, an intelligent terminal and a charging management method thereof, wherein the charging circuit comprises an interface circuit, a feedback circuit and a battery charging circuit, wherein the voltage input end of the interface circuit is used for being connected with an external charger, and the voltage output end of the interface circuit is respectively connected with the feedback circuit and the battery charging circuit; the feedback circuit comprises at least two branches which are connected in parallel, each branch comprises a resistor, one end of each resistor is connected to the voltage output end of the interface circuit, and the other end of each resistor is connected with the feedback input end of the interface circuit; wherein the resistance values of the resistors are different; the feedback input end is used for acquiring the feedback voltage of the feedback circuit to determine the current branch circuit which is conducted by the feedback circuit when the charging circuit is connected with an external charger so as to determine the input voltage of the battery charging circuit. Through above-mentioned charging circuit, can control charging voltage and corresponding charging time, improve user experience.
Description
Technical Field
The invention relates to the field of intelligent terminal charging, in particular to a charging circuit, an intelligent terminal and a charging management method thereof.
Background
Along with the development of electronic technology and the continuous improvement of the living standard of people, the use of various intelligent terminals is more and more popularized, the battery capacity of the intelligent terminal is also increased continuously, and the realization of intelligent quick charging of the intelligent terminal is more and more important.
At present, when the intelligent terminal is charged, generally, the intelligent terminal is charged through a constant current or a constant voltage, and the charging time of the battery is not only related to the charging current or the charging voltage, but also has an inseparable relation with the capacity of the intelligent terminal battery. In order to shorten the charging time of a large-capacity battery, the intelligent terminal is rapidly charged mainly through a rapid charging protocol.
But the quick charging protocol has obvious defects at present: on one hand, a special processor is required, so that the cost is high, and the standardization of the charger is not facilitated; on the other hand, the fast charging protocol is fixed and cannot automatically identify different communication modes, so that the use of the fast charging technology is limited and the compatibility is poor. Furthermore, if the battery is continuously charged rapidly, the service life of the battery is affected.
Disclosure of Invention
The invention mainly solves the technical problem of providing a charging circuit, an intelligent terminal and a charging management method thereof, which can control charging voltage and corresponding charging time, improve user experience, have simple design and can reduce production cost.
In order to solve the technical problems, the first technical scheme adopted by the invention is as follows: there is provided a charging circuit, comprising: the voltage output end of the interface circuit is respectively connected with the feedback circuit and the battery charging circuit; the feedback circuit comprises at least two branches which are connected in parallel, each branch comprises a resistor, one end of each resistor is connected to the voltage output end of the interface circuit, and the other end of each resistor is connected to the feedback input end of the interface circuit; wherein the resistance values of the resistors are different;
the feedback input end is used for acquiring the feedback voltage of the feedback circuit to determine the current branch which is conducted by the feedback circuit when the charging circuit is connected with the external charger so as to determine the input voltage of the battery charging circuit.
In order to solve the above technical problems, the second technical solution adopted by the present invention is: the utility model provides a smart terminal, smart terminal includes charging circuit, charging circuit includes: the voltage output end of the interface circuit is respectively connected with the feedback circuit and the battery charging circuit; the feedback circuit comprises at least two branches which are connected in parallel, each branch comprises a resistor, one end of each resistor is connected to the voltage output end of the interface circuit, and the other end of each resistor is connected to the feedback input end of the interface circuit; wherein the resistance values of the resistors are different; the feedback input end is used for acquiring the feedback voltage of the feedback circuit to determine the current branch which is conducted by the feedback circuit when the charging circuit is connected with the external charger so as to determine the input voltage of the battery charging circuit.
In order to solve the above technical problems, the third technical solution adopted by the present invention is: a charging management method of an intelligent terminal comprises an interface circuit, a feedback circuit and a battery charging circuit, wherein a voltage input end of the interface circuit is used for being connected with an external charger, and a voltage output end of the interface circuit is respectively connected with the feedback circuit and the battery charging circuit; the feedback circuit comprises at least two branches which are connected in parallel, each branch comprises a resistor, one end of each resistor is connected to the voltage output end of the interface circuit, and the other end of each resistor is connected to the feedback input end of the interface circuit; wherein the resistance values of the resistors are different; the method for charging management comprises the following steps: the intelligent terminal receives a charging instruction sent by a user; acquiring feedback voltage input by a feedback input end of the feedback circuit when responding to the charging instruction; selecting a current charging mode according to the feedback voltage; and charging the intelligent terminal through the charging current or the charging voltage in the charging mode.
The invention has the beneficial effects that: through different feedback branch roads in the charging circuit, control charging voltage and corresponding charge time, not only can realize carrying out the charging of different modes to intelligent terminal, for example fill mode and common mode soon, improve user experience, also be favorable to prolonging the life of battery simultaneously. Further, different types of communication modes or protocols may be automatically identified by the charging circuit. Moreover, the charging circuit is simple and flexible in design, good in compatibility and capable of reducing production cost.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a charging circuit of an intelligent terminal according to the present invention;
fig. 2 is a schematic structural diagram of an embodiment of an application scenario corresponding to a charging circuit of the smart terminal of fig. 1;
fig. 3 is an equivalent circuit diagram of an embodiment of an operating state of an application scenario corresponding to the charging circuit of the smart terminal of fig. 2;
FIG. 4 is a schematic diagram of an equivalent circuit of another embodiment of an operating state of an application scenario corresponding to the charging circuit of the smart terminal of FIG. 2;
FIG. 5 is a schematic diagram of an equivalent circuit of another embodiment of an operating state of an application scenario corresponding to the charging circuit of the smart terminal of FIG. 2;
fig. 6 is a schematic structural diagram of another embodiment of an application scenario corresponding to the charging circuit of the intelligent terminal of fig. 1;
fig. 7 is a flowchart illustrating a charging management method for an intelligent terminal according to an embodiment of the present invention.
Detailed Description
The present invention provides an intelligent terminal, a charging circuit thereof, and a charging management method thereof, and in order to make the objects, technical solutions, and technical effects of the present invention more clear and clearer, the present invention is further described in detail below, and it should be understood that the specific embodiments described herein are only for explaining the present invention, and are not intended to limit the present invention.
The present embodiment provides a charging circuit, which includes an interface circuit, a feedback circuit, and a battery charging circuit. The interface circuit comprises a voltage input end, a voltage output end and a feedback input end, wherein the input end of the interface circuit is connected with the voltage input end of the external charger and used for receiving charging voltage input by the external charger; the voltage output end of the interface circuit is respectively connected with the feedback circuit and the battery charging circuit and is used for transmitting the received charging voltage to the feedback circuit and the battery charging circuit; the feedback input end of the interface circuit is connected with the feedback circuit and used for receiving the feedback voltage from the feedback circuit. In a specific embodiment, the interface circuit includes a USB device, such as a Type-A USB device, a Type-B USB device, or a Type-C USB device, wherein the input of the interface circuit is electrically connected to a particular pin of the USB device. For example, the USB device includes 5 pins, which are respectively: the Vbus pin, the GND pin, the D + pin, the D-pin and a reserved pin can electrically connect the input end of the interface circuit with the reserved pin of the USB device in order to ensure that data transmission is not influenced in the charging process. Alternatively, the device may be a Lightning interface device.
Specifically, in this embodiment, the feedback circuit includes at least two branches connected in parallel, and each branch includes a resistor. One end of the resistor of each branch circuit is connected to the voltage output end of the interface circuit, and the other end of the resistor of each branch circuit is connected to the feedback input end of the interface circuit. The resistance values of the resistors of each branch circuit are different, and when the charging circuit is connected with an external charger, the feedback voltage fed back to the feedback input end of the interface circuit by each branch circuit is different. Therefore, the feedback voltage of the feedback circuit can be collected through the feedback input end to determine the branch circuit which is conducted by the feedback circuit, so that the input voltage of the battery charging circuit is determined.
In one embodiment, each branch in the feedback circuit further includes a switch connected in series with the resistor for controlling on/off of the corresponding branch. The switch may include a field effect transistor or a triode, or may be a channel switching IC having a channel selection function.
In another embodiment, the feedback circuit further includes a single-pole multi-throw switch, a free end of the single-pole multi-throw switch is connected to the voltage output end of the interface circuit, and at least two fixed ends of the single-pole multi-throw switch are connected to the branches of the feedback circuit, so that when the fixed ends are connected to the free end, the voltage output end of the interface circuit is electrically connected to the corresponding branch of the fixed ends, that is, a certain branch of the feedback circuit is turned on.
Here, it is explained that the feedback circuit includes two branches, and the interface circuit includes a USB device. In one embodiment, referring to fig. 1, fig. 1 is a schematic structural diagram of a charging circuit of an intelligent terminal according to an embodiment of the present invention.
As shown in fig. 1, the charging circuit 10 includes an interface circuit 101, a feedback circuit 102, and a battery charging circuit 103. The interface circuit 101 includes a voltage input terminal 1011, a voltage output terminal 1012, a feedback input terminal 1014, and a feedback output terminal 1013. It should be noted that the voltage input terminal 1011 and the voltage output terminal 1012 are two opposite ends of the Vbus pin of the USB device in the interface circuit 101, respectively, and in terms of the signal flow direction, one end is a signal input terminal, and the other end is a signal output terminal; the feedback input terminal 1014 and the feedback input terminal 1013 are opposite ends of a reserved pin of the USB device in the interface circuit 101, and one end is an input terminal of the signal and the other end is an output terminal of the signal in terms of the signal flow direction.
The feedback circuit 102 includes two branches connected in parallel, and each branch includes a resistor. When the charging circuit 10 is connected to an external charger, because the resistances of the resistor 1021 and the resistor 1022 are different, the feedback voltage fed back to the feedback input terminal 1014 of the interface circuit 101 by each branch is different. Thus, the feedback voltage of the feedback circuit 102 can be collected through the feedback input terminal 1014 to determine the branch of the feedback circuit 102 that is turned on, so as to determine the input voltage of the battery charging circuit 103.
In addition, one branch of the feedback circuit 102 further includes a switch 1023, and the other branch further includes a switch 1024, and the on/off of the corresponding branch is controlled by the switch 1023 and the switch 1024.
For clearly explaining the operation mode of the charging circuit, referring to fig. 2, fig. 2 is a schematic structural diagram of an embodiment of an application scenario corresponding to the charging circuit of the intelligent terminal of fig. 1.
As shown in fig. 2, the charging circuit 20 is electrically connected to the external charger 30 through a data line 40. The external charger 30 comprises a resistor 301 and a resistor 302, wherein one end of the resistor 301 is connected with a voltage output end 303 of the external charger 30, and the other end of the resistor 301 is connected with one end of the resistor 302; the other end of resistor 302 is connected to ground 305 of external charger 30. A terminal 306 formed by connecting the resistor 302 and the resistor 301 is connected to a feedback input terminal 304 of the external charger 30.
Specifically, the external charger 30 further includes a transformer, a signal input circuit and a signal output circuit, the signal input circuit is configured to receive a commercial power, that is, a power frequency alternating current, for example, a 220V commercial power, and transmit a commercial power signal after signal processing such as rectification and filtering to the transformer; the transformer converts the received commercial power signal into an electrical signal, such as a 5V dc voltage, which can be supplied to the corresponding charging device, and transmits the converted electrical signal to the signal output circuit.
In addition, the external charger 30 includes a processor including a feedback pin V and a feedback circuitFbAs a reference voltage for the external charger 30 during operation, wherein VFbIs related to the type of processor selected, and V is provided in the processor dataFbThe specific value. The processor is also connected to the transformer and the feedback circuit.
The operation of the external charger 30 is explained in detail below, and when the external charger 30 charges the charging device, the processor feeds back the voltage through the feedback pin VFbAnd detecting the feedback voltage of the feedback circuit of the charging equipment, wherein the feedback voltage is the voltage fed back to the external charger 30 by the charging equipment in the charging process. And the processor adjusts the electric signal output by the transformer according to the feedback result, so that the charging voltage output to the corresponding charging equipment is dynamically adjusted.
Further, with reference to fig. 2, the resistor 301 and the resistor 302 are part of a feedback circuit, wherein the end of the resistor 301 connected to the voltage output terminal 303 of the external charger 30 is also connected to a signal output circuit (not shown) of the external charger 30 for receiving the charging voltage. Endpoint 306 is also coupled to a feedback pin V of the processorFbConnected (not shown) to sense the feedback voltage at terminal 306.
The circuit diagram of fig. 2 has three different operating states, i.e., different charging voltages output, and the three operating states are explained below.
With reference to fig. 2 and 3, fig. 3 is an equivalent circuit schematic diagram of an embodiment of an application scenario corresponding to the charging circuit of the smart terminal of fig. 2.
When the external charger 30 is not connected to the charging circuit 20, the resistor 301 and the resistor 302 are connected in series, and an equivalent circuit diagram of the resistor 301 and the resistor 302 is obtained. As shown in fig. 3, the output charging voltage satisfies formula one:
wherein, Vbus1A charging voltage, V, received by a terminal of the resistor 301 connected to an output circuit of the external charger 30FbIs the voltage of the feedback pin of the processor, R1Is the resistance value of the resistor 301, R2Is the resistance of resistor 302.
With reference to fig. 2 and 4, fig. 4 is a schematic diagram of an equivalent circuit of another embodiment of an application scenario corresponding to the charging circuit of the smart terminal of fig. 2.
When the external charger 30 is connected to the charging circuit 20, that is, the voltage output terminal 303 of the external charger 30 is connected to the voltage input terminal 2011 of the interface circuit 201, the feedback input terminal 304 of the external charger 30 is connected to the feedback output terminal 2013 of the interface circuit 201, and the ground terminal 305 of the external charger 30 is connected to the ground terminal 2015 of the interface circuit 201. And only when the branch where the resistor 2021 is located is turned on, that is, the switch 2023 is turned on, the resistor 301 is connected in parallel with the resistor 2021 and then connected in series with the resistor 302, so that the equivalent circuit diagram of the resistor 301, the resistor 302 and the resistor 2021 is shown in fig. 4, and the output charging voltage satisfies the formula two:
wherein, Vbus2A charging voltage, V, received by a terminal of the resistor 301 connected to an output circuit of the external charger 30FbIs the voltage of the feedback pin of the processor, RAR is the equivalent resistance value after the resistor 301 and the resistor 2021 are connected in parallel2Is the resistance of resistor 302.
With reference to fig. 2 and 5, fig. 5 is a schematic diagram of an equivalent circuit of another embodiment of an operating state of an application scenario corresponding to a charging circuit of the smart terminal of fig. 2.
When the external charger 30 is connected to the charging circuit 20, that is, the voltage output terminal 303 of the external charger 30 is connected to the voltage input terminal 2011 of the interface circuit 201, the feedback input terminal 304 of the external charger 30 is connected to the feedback output terminal 2013 of the interface circuit 201, and the ground terminal 305 of the external charger 30 is connected to the ground terminal 2015 of the interface circuit 201And (6) connecting. And only when the branch where the resistor 2022 is located is turned on, that is, the switch 2024 is turned on, the resistor 301 is connected in parallel with the resistor 2022 and then connected in series with the resistor 302, so that the equivalent circuit diagram of the resistor 301, the resistor 302 and the resistor 2022 is shown in fig. 5, and the output charging voltage satisfies the formula three:
wherein, Vbus3A charging voltage, V, received by a terminal of the resistor 301 connected to an output circuit of the external charger 30FbIs the voltage of the feedback pin of the processor, RBR is the equivalent resistance value after the resistor 301 and the resistor 2022 are connected in parallel2Is the resistance of resistor 302.
Continuing with FIG. 2, from the above analysis, R is determined to be different between the resistor 2021 and the resistor 2022AAnd RBWhen the resistance values of the feedback circuit 202 are different, the corresponding charging voltage V is applied when the different branches of the feedback circuit are conductedbus2、Vbus3The input voltage of the battery charging circuit 203 is correspondingly different.
When the resistance of the resistor 2021 is smaller than that of the resistor 2022, R isAIs less than RBThe resistance value of V can be known according to the formula two and the formula threebus2Voltage value of less than Vbus3The voltage value of (b) can be understood as the charging voltage V input to the battery charging circuit 203 when the branch of the resistor 2022 is turned onbus3And the charging mode can be understood as a fast charging mode, and the charging time can be shortened and the user experience can be improved.
In another embodiment, a single-pole multi-throw switch can be selected to control the on/off of the corresponding branch. The difference between this embodiment and the above embodiment is the type of switch. Referring to fig. 6, fig. 6 is a schematic structural diagram of another embodiment of an application scenario corresponding to the charging circuit of the intelligent terminal of fig. 1.
As shown in fig. 6, when the external charging circuit 70 is connected to the charging circuit 60 through the data line 80, an external charging voltage may be received and transmitted to the battery charging circuit 603, thereby charging the battery.
In the present embodiment, the charge control circuit 60 includes an interface circuit 601, a feedback circuit 602, and a battery charging circuit 603. The feedback circuit 602 includes a resistor 6021, a resistor 6022, and a switch 6023. The switch 6023 includes a free end 60233, a fixed end 60231, and a fixed end 60232. The voltage output 6012 of the interface circuit 601 is connected to the free end 60233 of the switch 6023, the fixed end 60231 of the switch 6023 is connected to one end of the resistor 6021, and the fixed end 60232 of the switch 6023 is connected to one end of the resistor 6022. When the free end 60233 is connected to the fixed end 60231, the branch where the resistor 6021 is located is turned on; when the free end 60233 is connected to the fixed end 60232, the branch in which the resistor 6022 is located is turned on. Thereby realizing the function of controlling the on-off of different branches.
The specific operation of the charging circuit 60, the above embodiments are explained in detail, and will not be described herein.
It should be emphasized that, in any of the above embodiments, other types of switches may also be selected as the switch, such as a multi-pole multi-throw switch, and a multi-channel switching IC, as long as the on/off of different branches is controlled, and is not limited specifically herein.
Different from the prior art, this embodiment controls charging voltage and corresponding charging time through different feedback branch roads in the charging circuit, not only can realize carrying out the charging of different modes to intelligent terminal, for example quick charge mode and common mode, improves user experience, also is favorable to prolonging the life of battery simultaneously. Further, different types of communication modes or protocols may be automatically identified by the charging circuit. Moreover, the charging circuit is simple and flexible in design, good in compatibility and capable of reducing production cost.
In another specific embodiment, an intelligent terminal includes the charging circuit in any of the above embodiments.
The intelligent terminal includes a mobile phone, a tablet computer, an intelligent watch, or other intelligent terminal devices, which is not limited herein.
The charging circuit includes an interface circuit, a feedback circuit, and a battery charging circuit. The interface circuit comprises a voltage input end, a voltage output end and a feedback input end, wherein the input end of the interface circuit is connected with the voltage input end of the external charger and used for receiving charging voltage input by the external charger; the voltage output end of the interface circuit is respectively connected with the feedback circuit and the battery charging circuit and is used for transmitting the received charging voltage to the feedback circuit and the battery charging circuit; the feedback input end of the interface circuit is connected with the feedback circuit and used for receiving the feedback voltage from the feedback circuit. In a specific embodiment, the interface circuit includes a USB device, such as a Type-A USB device, a Type-B USB device, or a Type-C USB device, wherein the input of the interface circuit is electrically connected to a particular pin of the USB device. For example, the USB device includes 5 pins, which are respectively: the Vbus pin, the GND pin, the D + pin, the D-pin and a reserved pin can electrically connect the input end of the interface circuit with the reserved pin of the USB device in order to ensure that data transmission is not influenced in the charging process. Alternatively, the device may be a Lightning interface device.
Specifically, in this embodiment, the feedback circuit includes at least two branches connected in parallel, and each branch includes a resistor. One end of the resistor of each branch circuit is connected to the voltage output end of the interface circuit, and the other end of the resistor of each branch circuit is connected to the feedback input end of the interface circuit. The resistance values of the resistors of each branch circuit are different, and when the charging circuit is connected with an external charger, the feedback voltage fed back to the feedback input end of the interface circuit by each branch circuit is different. Therefore, the feedback voltage of the feedback circuit can be collected through the feedback input end to determine the branch circuit which is conducted by the feedback circuit, so that the input voltage of the battery charging circuit is determined.
In one embodiment, each branch in the feedback circuit further includes a switch connected in series with the resistor for controlling on/off of the corresponding branch. The switch may include a field effect transistor or a triode, or may be a channel switching IC having a channel selection function.
In another embodiment, the feedback circuit further includes a single-pole multi-throw switch, a free end of the single-pole multi-throw switch is connected to the voltage output end of the interface circuit, and at least two fixed ends of the single-pole multi-throw switch are connected to the branches of the feedback circuit, so that when the fixed ends are connected to the free end, the voltage output end of the interface circuit is electrically connected to the corresponding branch of the fixed ends, that is, a certain branch of the feedback circuit is turned on.
The foregoing description has been detailed with respect to the circuit design and operation of the charging circuit in the intelligent terminal, and is not repeated here.
Different from the prior art, this embodiment controls charging voltage and corresponding charging time through different feedback branch roads in the charging circuit, not only can realize carrying out the charging of different modes to intelligent terminal, for example quick charge mode and common mode, improves user experience, also is favorable to prolonging the life of battery simultaneously. Further, different types of communication modes or protocols may be automatically identified by the charging circuit. Moreover, the charging circuit is simple and flexible in design, good in compatibility and capable of reducing production cost.
Referring to fig. 7, fig. 7 is a schematic flowchart illustrating a charging management method for an intelligent terminal according to an embodiment of the present invention.
The intelligent terminal of the embodiment comprises an interface circuit, a feedback circuit and a battery charging circuit. The interface circuit comprises a voltage input end, a voltage output end and a feedback input end, wherein the input end of the interface circuit is connected with the voltage input end of the external charger and used for receiving charging voltage input by the external charger; the voltage output end of the interface circuit is respectively connected with the feedback circuit and the battery charging circuit and is used for transmitting the received charging voltage to the feedback circuit and the battery charging circuit; the feedback input end of the interface circuit is connected with the feedback circuit and used for receiving the feedback voltage from the feedback circuit. In a specific embodiment, the interface circuit includes a USB device, such as a Type-A USB device, a Type-B USB device, or a Type-C USB device, wherein the input of the interface circuit is electrically connected to a particular pin of the USB device. For example, the USB device includes 5 pins, which are respectively: the Vbus pin, the GND pin, the D + pin, the D-pin and a reserved pin can electrically connect the input end of the interface circuit with the reserved pin of the USB device in order to ensure that data transmission is not influenced in the charging process. Alternatively, the device may be a Lightning interface device.
Specifically, in this embodiment, the feedback circuit includes at least two branches connected in parallel, and each branch includes a resistor. One end of the resistor of each branch circuit is connected to the voltage output end of the interface circuit, and the other end of the resistor of each branch circuit is connected to the feedback input end of the interface circuit. The resistance values of the resistors of each branch circuit are different, and when the charging circuit is connected with an external charger, the feedback voltage fed back to the feedback input end of the interface circuit by each branch circuit is different. Therefore, the feedback voltage of the feedback circuit can be collected through the feedback input end to determine the branch circuit which is conducted by the feedback circuit, so that the input voltage of the battery charging circuit is determined.
In one embodiment, each branch in the feedback circuit further includes a switch connected in series with the resistor for controlling on/off of the corresponding branch. The switch may include a field effect transistor or a triode, or may be a channel switching IC having a channel selection function.
In another embodiment, the feedback circuit further includes a single-pole multi-throw switch, a free end of the single-pole multi-throw switch is connected to the voltage output end of the interface circuit, and at least two fixed ends of the single-pole multi-throw switch are connected to the branches of the feedback circuit, so that when the fixed ends are connected to the free end, the voltage output end of the interface circuit is electrically connected to the corresponding branch of the fixed ends, that is, a certain branch of the feedback circuit is turned on.
In the present embodiment, the charge management method includes:
701: and the intelligent terminal receives a charging instruction sent by a user.
The intelligent terminal includes a mobile phone, a tablet computer, an intelligent watch, or other intelligent terminal devices, which is not limited specifically herein.
In a specific implementation manner, the intelligent terminal receives a charging instruction sent by a user, and the user can select a corresponding charging mode according to the requirement.
702: and acquiring feedback voltage input by a feedback input end of the feedback circuit when the charging instruction is responded.
In a specific embodiment, the intelligent terminal collects feedback voltage input by a feedback input end of the feedback circuit when responding to the charging command. Specifically, the intelligent terminal responds to a user instruction to enable branches in the feedback circuit corresponding to the user instruction to be conducted, wherein feedback voltages of different feedback branches are different. The intelligent terminal collects the feedback voltage input by the feedback input end, so that the conducted feedback branch is determined.
703: and selecting the current charging mode according to the feedback voltage.
In a specific embodiment, the intelligent terminal determines the conducting feedback branch according to the feedback voltage, wherein different feedback branches correspond to different charging modes, so that the current charging mode is selected according to the feedback voltage.
704: and charging the intelligent terminal through the charging current or the charging voltage in the charging mode.
In a specific embodiment, the intelligent terminal is charged by a charging current or a charging voltage in a corresponding charging mode.
Different from the prior art, this embodiment controls charging voltage and corresponding charging time through different feedback branch roads in the charging circuit, not only can realize carrying out the charging of different modes to intelligent terminal, for example quick charge mode and common mode, improves user experience, also is favorable to prolonging the life of battery simultaneously. Further, different types of communication modes or protocols may be automatically identified by the charging circuit. Moreover, the charging circuit is simple and flexible in design, good in compatibility and capable of reducing production cost.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (4)
1. A charging circuit, comprising:
the voltage output end of the interface circuit is respectively connected with the feedback circuit and the battery charging circuit;
the feedback circuit comprises at least two branches which are connected in parallel, each branch comprises a resistor, one end of each resistor is connected to the voltage output end of the interface circuit, and the other end of each resistor is connected to the feedback input end of the interface circuit; wherein the resistance values of the resistors are different;
the feedback input end is used for acquiring the feedback voltage of the feedback circuit to determine a current branch which is conducted by the feedback circuit when the charging circuit is connected with the external charger so as to determine the input voltage of the battery charging circuit;
the feedback circuit further comprises a single-pole multi-throw switch, the free end of the single-pole multi-throw switch is connected with the voltage output end of the interface circuit, at least two fixed ends of the single-pole multi-throw switch are connected with branches of the feedback circuit, so that when the fixed ends are connected with the free ends, the voltage output end of the interface circuit is electrically connected with the branch corresponding to the fixed ends;
the external charger comprises a processor and a feedback circuit, the feedback circuit of the external charger comprises a first resistor and a second resistor, one end of the first resistor is connected with a voltage output end of the external charger, and the other end of the first resistor is connected with one end of the second resistor; the other end of the second resistor is connected with the grounding end of an external charger; the end point of the first resistor connected with the second resistor is connected with the feedback input end of an external charger; the terminal is connected with the processor to detect a feedback voltage at the terminal;
the external charger also comprises a transformer, a signal input circuit and a signal output circuit, wherein the signal input circuit is used for receiving commercial power and transmitting the commercial power to the transformer; the transformer converts the commercial power signal and transmits the commercial power signal to the signal output circuit.
2. The charging circuit of claim 1, wherein the interface circuit comprises a USB device, and wherein the feedback input is electrically connected to a particular pin of the USB device.
3. The intelligent terminal is characterized in that the intelligent terminal comprises a charging circuit, and the charging circuit comprises:
the voltage output end of the interface circuit is respectively connected with the feedback circuit and the battery charging circuit;
the feedback circuit comprises at least two branches which are connected in parallel, each branch comprises a resistor, one end of each resistor is connected to the voltage output end of the interface circuit, and the other end of each resistor is connected to the feedback input end of the interface circuit; wherein the resistance values of the resistors are different;
the feedback input end is used for acquiring the feedback voltage of the feedback circuit to determine a current branch which is conducted by the feedback circuit when the charging circuit is connected with the external charger so as to determine the input voltage of the battery charging circuit;
the feedback circuit further comprises a single-pole multi-throw switch, the free end of the single-pole multi-throw switch is connected with the voltage output end of the interface circuit, at least two fixed ends of the single-pole multi-throw switch are connected with branches of the feedback circuit, so that when the fixed ends are connected with the free ends, the voltage output end of the interface circuit is electrically connected with the branch corresponding to the fixed ends;
the external charger comprises a processor and a feedback circuit, the feedback circuit of the external charger comprises a first resistor and a second resistor, one end of the first resistor is connected with a voltage output end of the external charger, and the other end of the first resistor is connected with one end of the second resistor; the other end of the second resistor is connected with the grounding end of an external charger; the end point of the first resistor connected with the second resistor is connected with the feedback input end of an external charger; the terminal is connected with the processor to detect a feedback voltage at the terminal;
the external charger also comprises a transformer, a signal input circuit and a signal output circuit, wherein the signal input circuit is used for receiving commercial power and transmitting the commercial power to the transformer; the transformer converts the commercial power signal and transmits the commercial power signal to the signal output circuit.
4. The charging management method of the intelligent terminal is characterized in that the intelligent terminal comprises an interface circuit, a feedback circuit and a battery charging circuit, wherein a voltage input end of the interface circuit is used for being connected with an external charger, and a voltage output end of the interface circuit is respectively connected with the feedback circuit and the battery charging circuit; the feedback circuit comprises at least two branches which are connected in parallel, each branch comprises a resistor, one end of each resistor is connected to the voltage output end of the interface circuit, and the other end of each resistor is connected to the feedback input end of the interface circuit; wherein the resistance values of the resistors are different;
the feedback circuit further comprises a single-pole multi-throw switch, the free end of the single-pole multi-throw switch is connected with the voltage output end of the interface circuit, at least two fixed ends of the single-pole multi-throw switch are connected with branches of the feedback circuit, so that when the fixed ends are connected with the free ends, the voltage output end of the interface circuit is electrically connected with the branch corresponding to the fixed ends;
the external charger comprises a processor and a feedback circuit, the feedback circuit of the external charger comprises a first resistor and a second resistor, one end of the first resistor is connected with a voltage output end of the external charger, and the other end of the first resistor is connected with one end of the second resistor; the other end of the second resistor is connected with the grounding end of an external charger; the end point of the first resistor connected with the second resistor is connected with the feedback input end of an external charger; the terminal is connected with the processor to detect a feedback voltage at the terminal;
the external charger also comprises a transformer, a signal input circuit and a signal output circuit, wherein the signal input circuit is used for receiving commercial power and transmitting the commercial power to the transformer; the transformer converts the commercial power signal and transmits the commercial power signal to the signal output circuit;
the method for charging management comprises the following steps:
the intelligent terminal receives a charging instruction sent by a user;
acquiring feedback voltage input by a feedback input end of the feedback circuit when responding to the charging instruction;
selecting a current charging mode according to the feedback voltage;
and charging the intelligent terminal through the charging current or the charging voltage in the charging mode.
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| FR2624320B1 (en) * | 1987-12-02 | 1990-05-18 | Equip Electr Moteur | MONOLITHIC REGULATOR OF BATTERY CHARGE VOLTAGE BY AN ALTERNATOR PROTECTED AGAINST INTERFERENCE VOLTAGES |
| US8319479B2 (en) * | 2010-03-23 | 2012-11-27 | Ememory Technology Inc. | Method of estimating battery recharge time and related device |
| CN202260494U (en) * | 2011-07-26 | 2012-05-30 | 比亚迪股份有限公司 | Battery charging system |
| US9356460B2 (en) * | 2013-08-05 | 2016-05-31 | Texas Instruments Incorporated | Method and apparatus of fast battery charging with universal high power input source |
| CN204538751U (en) * | 2015-04-14 | 2015-08-05 | 东莞市德尔能新能源股份有限公司 | Can the charging circuit of compatible quick charge |
| CN206202014U (en) * | 2016-11-23 | 2017-05-31 | 深圳市巴丁微电子有限公司 | A kind of intelligent vehicle-carried charging circuit |
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