CN110729777A - Charging and communication circuit and method, and charging device, accessory and system thereof - Google Patents

Charging and communication circuit and method, and charging device, accessory and system thereof Download PDF

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Publication number
CN110729777A
CN110729777A CN201910601941.3A CN201910601941A CN110729777A CN 110729777 A CN110729777 A CN 110729777A CN 201910601941 A CN201910601941 A CN 201910601941A CN 110729777 A CN110729777 A CN 110729777A
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potential
terminal
charging
communication
box
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CN201910601941.3A
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CN110729777B (en
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黄海涛
张启明
魏荣城
翁建城
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Zhuhai Jieli Technology Co Ltd
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Zhuhai Jieli Technology Co Ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries

Abstract

The invention provides a charging and communication circuit and method and charging equipment, accessories and a system thereof, comprising: the box end communication module is used for generating a box end communication request signal and transmitting the box end communication request signal to the potential output end, and the potential of the box end communication request signal is not equal to the high potential and the low potential when the potential output end provides the charging power supply; and the path establishing module is used for disconnecting the charging power supply output to the potential output end according to the box end communication request signal so as to request to establish communication connection to the terminal connected to the potential output end. Therefore, potential interference caused by the charging power supply is reduced, the identification degree of the communication connection request is improved when the terminal connected to the potential output terminal requests to establish communication connection, and the communication connection establishment request is initiated more pertinently and effectively.

Description

Charging and communication circuit and method, and charging device, accessory and system thereof
Technical Field
The invention relates to the technical field of electronics, in particular to a charging and communication circuit and method, and charging equipment, accessories and a system thereof.
Background
With the development of technology, wireless headsets (such as bluetooth headsets) are becoming more and more popular. At present, a charging box is generally configured for a wireless headset, and the charging box and the wireless headset are charged mostly through two corresponding power supply contact points. There are many communication requirements between the charging box and the wireless headset, including: after the wireless earphone is inserted into the charging box, detecting the electric quantity of the earphone battery; the wireless earphone inquires the electric quantity of the charging box; a key pairing function on the wireless headset charging box, and the like.
When the existing charging box is communicated with the wireless earphone, the communication of the charging contact between the multiplexing charging box and the wireless earphone is realized, for example, in the charging process of the wireless earphone, the charging box pulls down the potential of the charging contact for a certain time so as to transmit the information of establishing a communication request to the wireless earphone. On one hand, the charging box is required to be in a high-level state for charging the wireless earphone, so that level change is realized to trigger a communication request; on the other hand, if the charging contact is always in the low level state, it is easy to cause the end to be communicated to continuously judge whether the other end is sending a communication request, and power consumption of the continuously judged end is increased.
In addition, the inventor researches and discovers that the charging box has some control requirements in the charging process. In a charging box for charging an existing wireless headset, the most common practice is that a single chip is used in the charging box to control a single wireless headset to charge, and when two wireless headsets are provided, for example, the charging box needs to be configured with two chips to respectively control the two wireless headsets. The hardware cost is high, and the product is difficult to miniaturize.
Therefore, how to more pertinently and effectively initiate the request for establishing the communication connection becomes a first technical problem to be solved urgently;
in addition, how to realize that a single control chip controls the working mode of the charging box becomes a second technical problem to be solved urgently.
Disclosure of Invention
In view of the above-mentioned state of the art, it is a primary object of the present invention to provide a charging and communication circuit and method, and a charging device, accessory and system therefor.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
according to a first aspect, an embodiment of the present invention discloses a communication circuit, including:
the box end communication module is used for generating a box end communication request signal and transmitting the box end communication request signal to the potential output end, and the potential of the box end communication request signal is not equal to the high potential and the low potential when the potential output end provides the charging power supply; and the path establishing module is used for disconnecting the charging power supply output to the potential output end according to the box end communication request signal so as to request to establish communication connection to the terminal connected to the potential output end.
According to a second aspect, an embodiment of the present invention discloses a communication circuit, including:
the terminal communication module of box, treater, route establish the module, wherein: the path establishing module comprises a potential switch unit and a current mirror, wherein the potential switch unit is connected between the charging power supply and the potential output end; the current mirror is connected in parallel with the input end and the output end of the potential switch unit, and the control end of the current mirror is connected to the processor; the control end of the potential switch unit, the processor and the box end communication module are sequentially connected; the box end communication module is used for generating a box end communication request signal and transmitting the box end communication request signal to the potential output end, and the box end communication request signal is used for requesting to establish communication connection with the machine end connected to the potential output end; the potential of the box end communication request signal is not equal to the high potential and the low potential when the potential output end provides the charging power supply; the processor responds to the communication request signal to output a switching control signal to turn off the potential switch unit; the box-end communication module includes: a first comparator, a second comparator and a logic device; the input end of the first comparator and the input end of the second comparator are connected to the potential output end; the output end of the first comparator and the output end of the second comparator are connected to the logic device, and the logic device determines that the receiver-side communication request signal is received when the first comparator outputs a comparison result larger than a first threshold value and the second comparator outputs a comparison result smaller than a second threshold value; the processor excites the current mirror to generate a response electric signal under the trigger of the machine-end communication request signal and transmits the response electric signal to the potential output end.
According to a third aspect, an embodiment of the present invention discloses a charging communication circuit, including:
the communication circuit of any one of the above first aspects; and the charging switch module comprises a plurality of switches and responds to the switching control signal to switch the working mode of the charging equipment.
According to a fourth aspect, an embodiment of the present invention discloses a charging communication circuit, including:
the terminal switch unit is connected between a potential receiving terminal and a terminal built-in battery, and the potential receiving terminal is used for providing a charging power supply for the terminal built-in battery; the terminal communication module is used for responding to a box terminal communication request signal received by the electric potential receiving terminal to turn off the terminal switch unit so as to disconnect a charging power supply provided by the electric potential receiving terminal to the terminal built-in battery; the potential of the box terminal communication request signal is not equal to the high potential and the low potential when the potential receiving terminal provides the charging power supply.
According to a fifth aspect, an embodiment of the present invention discloses a charging apparatus, including:
the communication circuit according to any one of the above first aspect or the charging communication circuit according to any one of the above second aspect.
According to a sixth aspect, an embodiment of the present invention discloses a charging apparatus, including:
the wired communication module is used for providing a box terminal communication request signal to request to establish communication connection with a terminal in a wired charging process; the potential of the box-end communication request signal is not equal to the high potential and the low potential when the charging power supply is supplied.
According to a seventh aspect, an embodiment of the present invention discloses an accessory, comprising:
the charging communication circuit of any of the fourth aspects.
According to an eighth aspect, an embodiment of the present invention discloses an intelligent terminal, including:
the intelligent terminal is local; the accessory of any of the above seventh aspects, performing data interaction with the smart terminal local machine.
According to a ninth aspect, an embodiment of the present invention discloses a communication system, including:
the communication circuit according to any one of the first aspect or the charging communication circuit according to any one of the second aspect; and the charging communication circuit according to any one of the above fourth aspects, wherein the potential output terminal and the potential receiving terminal are detachably connected.
According to a tenth aspect, an embodiment of the present invention discloses a charging communication system, including:
the charging device of any one of the fifth aspect or the sixth aspect described above; and the accessory of any of the above seventh aspects.
According to an eleventh aspect, an embodiment of the present invention discloses a charging communication system, including:
the charging device of any one of the fifth aspect or the sixth aspect described above; and, the intelligent terminal of any of the above eighth aspects; after the charging equipment is connected with the accessory, data interaction is carried out between the intelligent terminal local machine and the charging equipment through the accessory.
According to a twelfth aspect, an embodiment of the present invention discloses a charging communication method, including:
generating a first communication request signal and transmitting the first communication request signal to a potential transmission end, wherein the potential of the first communication request signal is not equal to the high potential and the low potential when the potential transmission end provides a charging power supply; according to the first communication request signal, the charging power supply output to the potential transmission terminal is disconnected, so that the requested terminal connected to the potential transmission terminal is requested to establish communication connection.
According to a thirteenth aspect, an embodiment of the present invention discloses a charging communication method, including:
receiving a first communication request signal requesting to establish communication connection by a request end through a potential transmission end, wherein the potential of the first communication request signal is not equal to the high potential and the low potential when the potential transmission end provides a charging power supply; and disconnecting the charging power supply of the potential transmission terminal according to the first communication request signal so as to establish communication connection with the request terminal connected to the potential transmission terminal.
According to the charging and communication circuit and method, and the charging device, the accessory and the system thereof disclosed by the embodiment of the invention, the box end communication module generates a box end communication request signal and transmits the box end communication request signal to the potential output end, and the potential of the box end communication request signal is not equal to the high potential and the low potential when the potential output end provides a charging power supply, so that a requested end can identify the box end communication request signal; the path establishing module is used for disconnecting the charging power supply output to the potential output end according to the box end communication request signal, so that potential interference caused by the charging power supply is reduced, the identification degree of the communication connection request is improved when the terminal connected to the potential output end requests to establish communication connection, and the communication connection request is initiated more pertinently and effectively.
In addition, in the scheme disclosed by the embodiment of the invention, the communication connection request is initiated by adopting a mode different from a high potential and a low potential when the potential output end provides the charging power supply, and compared with the mode of requesting in a continuous low level mode in the prior art, the probability of misjudgment when the charging contact is always in a low level state can be reduced.
In the alternative scheme disclosed by the embodiment of the invention, the charging communication circuit comprises the charging switch module, so that the working mode of the charging equipment end can be enriched, and the working mode of the charging box can be controlled by a single control chip through the cooperation of the charging switch module.
Drawings
Preferred embodiments according to the present invention will be described below with reference to the accompanying drawings. In the figure:
fig. 1 is a schematic structural diagram of a communication circuit disclosed in embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of another communication circuit disclosed in embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of a charging communication circuit disclosed in embodiment 1 of the present invention;
fig. 4 is a schematic structural diagram of a charging device disclosed in embodiment 1 of the present invention;
fig. 5 is a schematic structural diagram of a charging communication circuit disclosed in embodiment 2 of the present invention;
fig. 6 is a schematic diagram of an intelligent terminal disclosed in embodiment 2 of the present invention;
fig. 7 is a schematic structural diagram of a charging communication system according to an embodiment of the present invention;
fig. 8 is a flowchart of a charging communication method according to an embodiment of the present invention;
fig. 9 is a flowchart of another charging communication method according to an embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
In order to more specifically and effectively initiate a request for establishing a communication connection, the present embodiment discloses a communication circuit, which is suitable for a charging power supply terminal.
Referring to fig. 1, a schematic structural diagram of a communication circuit disclosed in this embodiment is shown, the communication circuit is suitable for a charging device, such as a charging box, a mobile power source, and the like, and the communication circuit includes: a box-end communication module 1, a processor 2 and a path establishing module 3, wherein:
the path establishing module 3 comprises a potential switch unit K11 and a current mirror 31, the potential switch unit K11 is connected between a charging power supply VCC and a potential output terminal C1, when the potential switch unit K11 is turned on, the charging power supply VCC can provide the power supply thereof to the potential output terminal C1 so as to provide the power supply for the device to be charged positioned at the potential output terminal C1, and when the potential switch unit K11 is turned on, the connection between the charging power supply VCC and the potential output terminal C1 is disconnected; the current mirror 31 is connected in parallel with the input terminal and the output terminal of the potential switch unit K11, and the control terminal of the current mirror 31 is connected to the processor 2.
The control terminal of the potential switch unit K11, the processor 2 and the box terminal communication module 1 are connected in sequence.
The box-end communication module 1 is used for generating a box-end communication request signal and transmitting the box-end communication request signal to the potential output end C1, wherein the box-end communication request signal is used for requesting to establish communication connection to the machine end connected to the potential output end C1; in this embodiment, the potential of the box-side communication request signal is not equal to the high potential and the low potential when the potential output terminal provides the charging power. It should be noted that, in the specific embodiment, when the charging power supply is supplied to the potential output terminal C1, the potential of the charging power supply is generally a PWM wave signal with high and low phases. In this embodiment, the potential of the box-side communication request signal is not equal to the high potential when the potential output terminal provides the charging power source, nor is it equal to the low potential when the potential output terminal provides the charging power source, that is, as the signal receiving terminal, the potential of the box-side communication request signal can be distinguished from the high potential and the low potential when the charging power source provides the charging power source. For example, the cartridge-side communication module 1 may generate a potential between a high potential and a low potential of the charging power supply as the cartridge-side communication request signal.
The processor 2 outputs a switching control signal to turn off the potential switch unit K11 in response to the communication request signal to disconnect the connection between the charging power supply VCC and the potential output terminal C1, so that the potential output terminal C1 requests the establishment of the communication connection to the terminal connected to the potential output terminal C1.
In order to realize the receiver-side communication request signal transmitted through the potential output terminal C1, the receiver-side communication request signal is recognized. In a specific embodiment, the box-end communication module 1 includes: a first comparator, a second comparator and a logic device; the input end of the first comparator and the input end of the second comparator are connected to a potential output end C1; the output end of the first comparator and the output end of the second comparator are connected to the logic device, and the logic device determines that the receiver-side communication request signal is received when the first comparator outputs a comparison result larger than a first threshold value and the second comparator outputs a comparison result smaller than a second threshold value; the processor 2 activates the current mirror to generate a response electrical signal under the trigger of the machine-side communication request signal, and transmits the response electrical signal to the potential output terminal C1. In this embodiment, the first threshold and the second threshold may be determined empirically, and specifically, are mainly used to distinguish between a high potential and a low potential when the potential output terminal provides the charging power source. Generally, the first threshold may be slightly higher than the low voltage level when the power supply is charged, the second threshold may be slightly lower than the high voltage level when the power supply is charged, and the specific values may be determined empirically, and the specific magnitudes of the first threshold and the second threshold are not limited in this embodiment. It should be noted that, when the signal received by the potential output terminal C1 is between the first threshold and the second threshold, the logic device may determine that the currently received signal is the terminal-side communication request signal sent by the terminal.
It should be noted that, in some embodiments, the first comparator, the second comparator and the logic device may also be implemented by other devices with certain logic operation capability, and should be regarded as an equivalent replacement of this embodiment, for example, by acquiring the potential of the potential output terminal C1, then determining, by the processor, the interval where the acquired potential is located, and then obtaining the determination result of whether the terminal communication request signal is sent by the terminal.
Referring to fig. 2, a schematic structural diagram of a communication circuit disclosed in this embodiment is shown, the communication circuit is suitable for a charging device, such as a charging box and a portable power source, and the communication circuit includes: a box-end communication module 1 and a path establishing module 3, wherein:
the box-end communication module 1 is used for generating a box-end communication request signal and transmitting the box-end communication request signal to the potential output end C1. In this embodiment, the potential output terminal C1 is a terminal for supplying power to the terminal connected to the terminal. In this embodiment, the potential of the box-side communication request signal is not equal to the high potential and the low potential when the potential output terminal C1 supplies the charging power. It should be noted that, in the specific embodiment, when the charging power supply is supplied to the potential output terminal C1, the potential of the charging power supply is generally a PWM wave signal with high and low phases. In this embodiment, the potential of the box-side communication request signal is not equal to the high potential when the potential output terminal provides the charging power source, nor is it equal to the low potential when the potential output terminal provides the charging power source. That is, as the signal reception side, the potential of the box side communication request signal can be distinguished from the high potential and the low potential at the time of charging the power supply. For example, the cartridge-side communication module 1 may generate a potential between a high potential and a low potential of the charging power supply as the cartridge-side communication request signal. In a specific implementation process, the box-side communication request signal may be a single level, or the box-side communication request signal may be encoded according to a preset rule to form a signal sequence.
The path establishing module 3 is configured to disconnect the charging power supply output to the potential output terminal C1(C2) according to the box-side communication request signal to request establishment of a communication connection to the terminal connected to the potential output terminal. In a specific embodiment, the path establishing module 3 may include a potential switch unit K11(K12), the potential switch unit K11 outputs a switching control signal to turn off in response to the communication request signal to disconnect the connection between the charging power source VCC and the potential output terminal C1, so that the potential output terminal C1 requests the establishment of the communication connection to the terminal connected to the potential output terminal C1.
In an embodiment, the communication circuit may include a processor 2, and the processor 2 controls the path establishing module 3 to disconnect the charging power supply output to the potential output terminal C1 according to the box-end communication request signal generated by the box-end communication module 1, in this embodiment, the processor 2 may share the processor with the charging device, or may be configured separately; in another embodiment, a logic device may be connected between the box-side communication module 1 and the path establishing module 3, and the logic device responds to a box-side communication request signal generated by the box-side communication module 1, and sends a trigger signal to the path establishing module 3 to disconnect the charging power supply output to the potential output terminal C1, so as to request to establish a communication connection to the terminal connected to the potential output terminal.
Referring to fig. 2, in an embodiment, the box-end communication module 1 includes: and the box end signal sending channel 11, wherein the box end signal sending channel 11 is used for transmitting a box end communication request signal to the potential output end C1. In the specific implementation, the box-end signaling channel 11 is in the off state when the potential output terminal C1 operates in the charging mode, so as to reduce power consumption. In this embodiment, the voltage output terminal C1 is used in the charging mode, which means that the charging device terminal is providing the charging power to the terminal connected to the voltage output terminal C1.
In order to implement bidirectional communication between the box end and the box end, in an alternative embodiment, the box end communication module 1 is further configured to sense a box end communication request signal received by the potential output terminal C1; the path establishing module 3 responds to the terminal communication request signal to generate a box terminal response signal, and transmits the box terminal response signal to the potential output terminal C1 to establish a communication connection with the terminal. In a specific embodiment, the path establishing module 3 may include a current mirror 31, the current mirror 31 may generate a box-end reply signal in response to the terminal communication request signal and transmit the box-end reply signal to the potential output terminal C1, and specifically, the current mirror 31 may generate a current signal of a set interval, and then form a potential signal of the set interval at the potential output terminal C1, where the potential signal of the set interval may serve as the box-end reply signal. It should be noted that, in the implementation process, the internal resistance and the current signal in the preset interval may be determined empirically.
In a specific embodiment, the box-end communication module 1 includes: the box terminal signal receiving channel 12, the box terminal signal receiving channel 12 is used for receiving the terminal communication request signal received by the potential output terminal C1. In order to enable the receiving channel 12 to receive communication information in time, in the present embodiment, the box-side signal receiving channel is in an on state when the potential output terminal C1 operates in the charging mode.
In order to realize the receiver-side communication request signal transmitted through the potential output terminal C1, the receiver-side communication request signal is recognized. In a specific embodiment, the box-end signal receiving channel 12 includes: and the box terminal comparator group is used for comparing the electric signals received by the potential output terminal, and outputting a comparison result of the communication request signal of the receiver terminal when the received electric signals are in a preset interval, wherein the comparison result is the communication request signal of the receiver terminal. Specifically, a first threshold and a second threshold may be set for the set of box-side comparators, and when the signal received by the potential output terminal C1 is greater than the first threshold and less than the second threshold, it is determined that the receiver-side communication request signal is received. In this embodiment, the first threshold and the second threshold may be determined empirically, and specifically, are mainly used to distinguish between a high potential and a low potential when the potential output terminal provides the charging power source. Generally, the first threshold may be slightly higher than the low voltage level when the power supply is charged, the second threshold may be slightly lower than the high voltage level when the power supply is charged, and the specific values may be determined empirically, and the specific magnitudes of the first threshold and the second threshold are not limited in this embodiment.
In order to realize that the charging device side serves two terminals simultaneously, in a specific embodiment, two box-side signal receiving channels and two box-side signal transmitting channels are provided, each box-side signal receiving channel and each box-side signal transmitting channel form a box-side communication module 1, and each terminal communication module 1 is connected to the first potential output terminal C1 and the second potential output terminal C2 respectively. In this embodiment, the two box-end signal receiving channels are configured to receive a first-end communication signal of the first potential output end C1 and a second-end communication signal of the second potential output end C2, respectively; the two box end signal sending channels are used for sending box end communication signals to the first machine end and sending box end communication signals to the second machine end respectively. It should be noted that, in other embodiments, the two end communication modules 1 may also be shared, that is, one box end signal receiving channel and one box end signal sending channel; the first terminal and the second terminal share a single box terminal signal receiving channel and a single box terminal signal transmitting channel, and at this time, the first potential output terminal C1 and the second potential output terminal C2 may be distinguished by a communication protocol, for example, the received communication signal of the first terminal and the received communication signal of the second terminal carry identification information for identifying the communication signal of the first terminal and the communication signal of the second terminal.
In one embodiment, when the number of the path establishing modules 3 is one, two box-end signal receiving channels may share the path establishing module; the two box end signal sending channels can also share the path establishing module.
In another embodiment, the number of the path establishing modules is two, and the path establishing modules are used for disconnecting the charging power supply output to the first potential output terminal and the second potential output terminal according to the box terminal communication request signal respectively. At the moment, when only one box end signal receiving channel and one box end signal sending channel exist, the two access establishing modules share one box end signal receiving channel and one box end signal sending channel; when there are two box end signal receiving channels and two box end signal sending channels, the two path establishing modules can be respectively configured with one box end signal receiving channel and one box end signal sending channel.
In the charging and communication circuit disclosed by the embodiment of the invention, the box end communication module generates a box end communication request signal and transmits the box end communication request signal to the potential output end, and the potential of the box end communication request signal is not equal to the high potential and the low potential when the potential output end provides a charging power supply, so that a requested end can identify the box end communication request signal; the path establishing module is used for disconnecting the charging power supply output to the potential output end according to the box end communication request signal, so that potential interference caused by the charging power supply is reduced, the identification degree of the communication connection request is improved when the terminal connected to the potential output end requests to establish communication connection, and the communication connection request is initiated more pertinently and effectively.
In addition, in the solution disclosed in this embodiment, a communication connection request is initiated by adopting a mode different from a high potential and a low potential when the potential output terminal provides the charging power supply, and compared with a mode of continuously requesting in a low level mode in the prior art, the probability of misjudgment when the charging contact is always in a low level state can be reduced.
To realize the switching of multiple working modes at the charging device end, the present embodiment further discloses a charging communication circuit, please refer to fig. 3, which is a schematic structural diagram of the charging communication circuit disclosed in the present embodiment, and the charging communication circuit includes: the communication circuit and the charging switch module (reference numeral not shown in the figure) disclosed in any of the above embodiments, wherein the charging switch module includes a plurality of switches, and the charging switch module switches the operating mode of the charging device in response to the switching control signal.
In an embodiment, referring to fig. 3, the charging switch module includes: one end of a first switch K21, a first switch K21 is connected to the internal battery terminal of the charging device, and the other end of the first switch K21 is connected to the junction Q of the charging power VCC and the external circuit of the internal battery. In this embodiment, the peripheral circuit refers to a circuit outside the battery built in the charging device. In a specific embodiment, the switching control signal includes a first switching control signal, and the first switch K21 is turned on or off in response to the first switching control signal to switch a mode in which the charging power source charges the internal battery or a mode in which the charging power source supplies power to the peripheral circuit. Specifically, when the first switch K21 is turned on in response to the first switching control signal, the charging power source VCC charges the battery built in the charging device; when the first switch K21 is turned off in response to the first switch control signal, the charging path from the charging power source VCC to the internal battery of the charging device is disconnected, and at this time, the charging power source VCC may supply power to the peripheral circuit. Through the setting of first change over switch K21, can be convenient for to the control of charging of the built-in battery of charging equipment to, when having charging source VCC in charging equipment, also can supply power for peripheral circuit through charging source VCC, reduced the consumption of built-in battery.
In order to suppress the peak current and the peak voltage of the internal battery, in an alternative embodiment, the charging switch module further includes: and a second change-over switch K22, the second change-over switch K22 being connected between the other end of the first change-over switch K21 and ground. In the present embodiment, the switching control signal includes a second switching control signal, and the second switch K22 is turned off when the first switch K21 is turned on and turned on when the first switch K21 is turned off in response to the second switching control signal. In this embodiment, when the second switch K22 is turned on in response to the second switching control signal, the power of the filter device in the internal battery module may be released.
It should be noted that, in the implementation process, when the first switch K21 is turned on to charge the internal battery, the second switch K22 should be in the off state, so that the charging power source VCC charges the internal battery.
In order to control the terminal charging path of the potential output terminal separately, in an alternative embodiment, the switching control signal includes a third switching control signal and a fourth switching control signal, the charging switch module multiplexes the potential switch units K11, K12, and the potential switch units K11 and K12 are respectively responsive to the third switching control signal and the fourth switching control signal to switch the terminal charging path of the charging power output to the potential output terminal. In this embodiment, the terminal charging path includes: a charging path of the charging power supply output power to the first potential output terminal C1, a charging path of the charging power supply output power to the second potential output terminal C2, and a charging path of the charging power supply output power to the first potential output terminal C1 and the second potential output terminal C2. In a specific embodiment, the potential switch unit K11 turns on/off the terminal charging path of the charging power output to the potential output terminal C1 in response to the third switching control signal; the potential switch unit K12 turns on/off the terminal charging path of the charging power supply output to the potential output terminal C2 in response to the fourth switching control signal. In the specific implementation process, the charging paths from the output power of the charging power supply to the first potential output terminal C1 and the second potential output terminal C2 may be individually turned on, or simultaneously turned off.
In an optional embodiment, the charging switch module further comprises: and the power switch K3 is connected between the charging power VCC and the junction point Q, and the switching control signal comprises a power control signal. In the present embodiment, the power switch K3 is turned on or off in response to a power control signal. As an example, when the power switch K3 is turned off and the first switch K21 is turned on, power may be supplied to the peripheral circuit and/or the terminal charging path through the built-in battery of the charging device; when the power switch K3 is turned on and the first switch K21 is turned off, power can be supplied to the peripheral circuit and/or the terminal charging path through the charging power VCC.
In a particular embodiment, the switching control signals for the various switches in the charging switch module come from the same processor, which may share a processor with the charging device.
The charging communication circuit disclosed by the embodiment realizes the switching of multiple working modes of the charging equipment end, so that the working modes of the charging equipment end become more flexible. Through the cooperation of the charging switch module, the working mode of the charging box can be controlled by a single control chip.
Based on the scheme disclosed in the above embodiment, this embodiment also discloses a charging device, and in a specific embodiment, the charging device may be a mobile power supply or a charging box. Referring to fig. 4, a schematic structural diagram of a charging device disclosed in this embodiment is shown, where the charging device includes: the wired communication module is used for providing a box end communication request signal in a wired charging process so as to request to establish communication connection with a machine end; the potential of the box-end communication request signal is not equal to the high potential and the low potential when the charging power VCC is supplied. In this embodiment, the wired charging process refers to a process of providing a charging power supply to the device to be charged when the charging device is wired to the device to be charged through the first potential output terminal C1 and/or the second potential output terminal C2. It should be noted that, in the implementation process, if the device to be charged is already fully charged, and the device to be charged is still wired to the charging device through the first potential output terminal C1 and/or the second potential output terminal C2, it should be considered as still being in the wired charging process.
The embodiment also discloses a charging device, and in a specific embodiment, the charging device can be a mobile power supply or a charging box. The charging device includes: the communication circuit disclosed in any of the above embodiments, or the charging communication circuit disclosed in any of the above embodiments.
In the charging device disclosed in this embodiment, the potential of the box-end communication request signal is not equal to the high potential and the low potential when the potential output terminal provides the charging power supply, so that the requested terminal can recognize the box-end communication request signal; the communication connection request is initiated by adopting a mode of high potential and low potential which are different from the mode of high potential and low potential when the potential output end provides the charging power supply, and compared with the mode of continuous low level request in the prior art, the probability of misjudgment when the charging contact is always in a low level state can be reduced.
Example 2
In order to more specifically and effectively initiate a request for establishing a communication connection, this embodiment discloses a communication circuit, which is applicable to a device to be charged, and in a specific embodiment, the device to be charged is a device used in cooperation with the charging device in the above embodiments, for example, the device to be charged may be an intelligent wearable device such as an earphone and a bracelet, and further may be an audio-visual device such as MP3 and MP4, and may also be an intelligent accessory with data processing capability that is matched with an intelligent terminal.
Referring to fig. 5, a schematic diagram of a charging communication circuit disclosed in this embodiment is shown, where the charging communication circuit includes: a terminal switch unit K4 and a terminal communication module 4, wherein,
the terminal switch unit K4 is connected between the potential receiving terminal C3 and the terminal built-in battery, and the potential receiving terminal C3 is configured to provide the terminal built-in battery with the charging power VCC, specifically, when the potential receiving terminal C3 is connected to the potential output terminal of the charging device terminal, the charging device terminal may provide the potential receiving terminal C3 with the charging power VCC through the potential output terminal, and then, the potential receiving terminal C3 provides the terminal built-in battery with the charging power VCC.
The terminal communication module 4 turns off the terminal switching unit K4 in response to the box terminal communication request signal received by the potential receiving terminal C3 to disconnect the charging power supplied from the potential receiving terminal to the terminal-side built-in battery. In this embodiment, the potential of the box-side communication request signal is not equal to the high potential and the low potential when the potential receiving terminal provides the charging power.
In an embodiment, the charging communication circuit may include a controller 5, and the controller 5 controls the terminal switch unit K4 to disconnect the charging power supply to the terminal built-in battery according to the box terminal communication request signal received by the terminal communication module 4, in this embodiment, the controller 5 may share a processor with the device to be charged, or may be configured separately; in another embodiment, a logic device may also be connected between the terminal communication module 4 and the terminal switch unit K4, and the logic device responds to the box terminal communication request signal received by the terminal communication module 4, and sends a trigger signal to the terminal switch unit K4 to disconnect the charging power supply provided to the terminal built-in battery, so as to establish a communication connection with the charging equipment terminal through the potential receiving terminal C3.
Referring to fig. 5, in an embodiment, the terminal communication module 4 includes: in order to enable the terminal signal receiving channel 41 to receive communication information in time, in the embodiment, the terminal signal receiving channel 41 is in an open state when the potential receiving end works in the charging mode.
In an embodiment, the end signal receiving channel 41 includes: and the terminal comparator group is used for comparing the electric signals received by the potential receiving terminal and outputting a comparison result of the received box terminal communication request signals when the received electric signals are in a preset interval. In a specific implementation process, the predetermined interval may be determined according to experience or needs, and in particular, regarding a scheme for determining that the request signal is received through the comparator group, reference may be made to similar related descriptions in embodiment 1, and details are not described herein again.
In an embodiment, the terminal communication module 4 is further configured to generate a terminal communication request signal and transmit the terminal communication request signal to the terminal receiving terminal C3, and the terminal switching unit K4 is configured to disconnect the charging power provided by the terminal receiving terminal to the built-in battery in response to the terminal communication request signal. In this embodiment, when the terminal needs to initiate a communication request, the potential receiving terminal C3 is connected to the charging device, so that the terminal can transmit a terminal communication request signal to the charging device terminal through the potential receiving terminal C3. In this embodiment, the electric potential of the terminal communication request signal is not equal to the high electric potential and the low electric potential when the electric potential receiving terminal receives the charging power.
In a specific embodiment, the terminal communication module 4 includes: the terminal signal transmitting channel 42, the terminal signal transmitting channel 42 is used for transmitting a terminal communication request signal to the potential receiving terminal C3. In a specific implementation, the terminal signal transmitting channel 42 is in an off state when the potential receiving terminal C3 operates in the charging mode, so as to reduce power consumption. In this embodiment, the voltage receiving terminal C3 is called as being in the charging mode, which means that the charging device terminal is providing the charging power for the voltage receiving terminal C3.
It should be noted that, in this embodiment, the terminal communication module 4 may also transmit a terminal response signal to the charging device terminal; of course, the terminal response signal may be generated based on the box terminal communication request by the current mirror. The principle is similar to that of the cassette terminal, and specifically, reference may be made to the description related to the current mirror and the response signal in embodiment 1, and details are not repeated here.
The embodiment also discloses an accessory, and the accessory can be wireless earphone, intelligent wearable equipment such as children's wrist-watch, bracelet, if again can be audio-visual accessories such as MP3, MP4, if again the accessory that possesses data interaction ability such as medical consumer goods of external use, can also be with other intelligent accessories that possess data processing ability that intelligent terminal matches. It should be noted that, in some application scenarios, such as a charging box and a wireless bluetooth headset, generally, the charging box is a charging device, and the wireless bluetooth headset is an accessory; the charging box may also serve as an accessory when the charging box is charged by other larger capacity charging devices, which are charging devices. The accessory disclosed by the embodiment comprises the charging communication circuit suitable for the device to be charged disclosed by any one of the embodiments. Of course, in some embodiments, the accessory may also include other components, such as a charging control module, a bluetooth module, etc., which are not enumerated herein, subject to space limitations.
Referring to fig. 6, the intelligent terminal disclosed in this embodiment is a schematic diagram of the intelligent terminal, and the intelligent terminal includes an intelligent terminal local machine 100 and an accessory 200 disclosed in any one of the above embodiments, where the accessory 200 performs data interaction with the intelligent terminal local machine 100. In an embodiment, the intelligent terminal 100 includes an intelligent local machine with data processing capability, such as a mobile phone local machine, a tablet computer local machine, a notebook computer local machine, a computer local machine, an MP3 local machine, an MP4 local machine, or a PDA. The data interaction mode of the accessory and the intelligent terminal local machine can be a wireless communication mode such as Bluetooth and WiFi.
The present embodiment also discloses a charging communication system, including: the communication circuit or the charging communication circuit for the charging device side disclosed in any of the above embodiments; and, the charging communication circuit for the device to be charged disclosed in any of the above embodiments, the potential output terminal C1 and the potential receiving terminal C3 are detachably connected. The device end to be charged and the charging device end carry out information transmission through the potential output end C1 and the potential receiving end C3.
The present embodiment also discloses a charging communication system, which includes: the charging device disclosed in any of the above embodiments, and the accessory disclosed in any of the above embodiments.
Referring to fig. 7, the present embodiment further discloses a charging communication system, including: the charging device 300 disclosed in any of the above embodiments, and the intelligent terminal disclosed in any of the above embodiments, wherein the intelligent terminal includes the intelligent terminal local 100 and the accessory 200 disclosed in any of the above embodiments. After the charging device 300 is connected with the accessory 200, data interaction is performed between the intelligent terminal 100 and the charging device 300 through the accessory 200.
For the convenience of those skilled in the art, the charging box (charging device 300), the mobile terminal (smart terminal 100) and the wireless headset (accessory 200) are described as an example, wherein the mobile terminal and the wireless headset are configured to enable data interaction, for example, data interaction via bluetooth, WiFi, etc.
The wireless earphone is connected with a potential output end C1(C2) of the charging box through a potential receiving end C3, and a charging power supply provided by the charging box can be transmitted to the wireless earphone through a terminal in wired connection to provide the charging power supply for the wireless earphone. The wireless earphone can keep a communication link connected with the mobile terminal according to the requirement, and certainly can be in a low power consumption mode. The mobile terminal sends an instruction of inquiring the electric quantity of the charging box to the wireless earphone, the wireless earphone is modulated into a machine end communication request signal according to the instruction and sent to the charging box, and the charging box executes corresponding operation according to the request signal so as to enable the charging box to be in wired communication connection with the wireless earphone, so that the mobile terminal can perform data interaction with the charging box by taking the wireless earphone as a pivot.
Referring to fig. 8, a flowchart of a charging communication method disclosed in this embodiment is shown, where the charging communication method includes the following steps:
in step S801, the first communication module generates a first communication request signal and transmits the first communication request signal to the potential transmission terminal. In this embodiment, the potential of the first communication request signal is not equal to the high potential and the low potential when the potential transmission terminal provides the charging power.
In this embodiment, the first communication module may be a box terminal communication module of the charging device terminal, at this time, the potential transmission terminal is a potential output terminal of the charging device terminal, and accordingly, the first communication request signal is a box terminal communication request signal; the first communication module may also be a terminal communication module of the device terminal to be charged, at this time, the potential transmission terminal is a potential receiving terminal of the device terminal to be charged, and accordingly, the first communication request signal is a terminal communication request signal.
It should be noted that, when the first communication request signal is a box-side communication request signal, the called potential transmission terminal is a potential output terminal of the charging device terminal; otherwise, the potential transmission terminal is the potential receiving terminal of the device to be charged.
In step S802, the first power transmission switch disconnects the charging power supply of the potential transmission terminal in response to the first communication request signal, so as to request the requested terminal connected to the potential transmission terminal to establish a communication connection.
In a specific embodiment, when the first communication request signal is a box-side communication request signal, the first power transmission switch is a box-side potential switch unit, and the box-side potential switch unit disconnects the charging power supply output to the potential output terminal in response to the box-side communication request signal, so as to request the device to be charged connected to the potential output terminal to establish communication connection;
when the first communication request signal is a terminal communication request signal, the first power transmission switch is a terminal potential switch unit, and the terminal potential switch unit responds to the terminal communication request signal to disconnect a charging power supply provided by a potential input terminal to a terminal built-in battery so as to request a charging equipment terminal connected to the potential input terminal to establish communication connection.
In step S803, the first communication module establishes a communication connection with a requested terminal connected to the potential transmission terminal through the potential transmission terminal. Specifically, the requested terminal may disconnect its switch unit connected to the potential transmission terminal after receiving the first communication request signal, and respond to the request terminal connected to the potential transmission terminal through the potential transmission terminal. Namely, the first communication module establishes communication connection with a requested terminal connected to the potential transmission terminal through the potential transmission terminal.
Referring to fig. 9, a flowchart of a charging communication method disclosed in this embodiment is shown, where the charging communication method includes the following steps:
in step S901, the second communication module determines whether the potential transmission end receives a first communication request signal requesting the request end to establish a communication connection. In this embodiment, the potential of the first communication request signal is not equal to the high potential and the low potential when the potential transmission terminal provides the charging power.
In this embodiment, the second communication module may be a terminal communication module of the device to be charged, at this time, the potential transmission terminal is a potential receiving terminal of the device to be charged, and accordingly, the first communication request signal is a box terminal communication request signal; the second communication module may also be a terminal communication module of the charging device terminal, at this time, the potential transmission terminal is a potential output terminal of the charging device terminal, and accordingly, the first communication request signal is a terminal communication request signal.
It should be noted that, in a specific implementation process, the determination manner of the first communication signal, which is different from the determination manner of the high potential and the low potential when the power supply is charged, may be implemented by a hardware circuit in cooperation with a logic device, for example, the determination manner is determined by a comparator set as disclosed in the above embodiment; the specific value of the collected potential can be obtained through AD conversion to determine the potential.
It should be noted that, in an alternative embodiment, when the second communication module is a box-side communication module of the charging device side, the second communication module may determine whether the first communication request signal is received during a charging window period of the charging device. In this embodiment, the charging window period refers to a period when the charging power is at a low potential while the charging power is being provided.
In a specific embodiment, if the second communication module determines that the potential transmission terminal receives the first communication request signal, step S902 is executed.
In step S902, the second power transmission switch responds to the first communication request signal provided by the second communication module to disconnect the charging power supply of the potential transmission terminal, so as to establish a communication connection with the request terminal connected to the potential transmission terminal.
In a specific embodiment, when the first communication request signal is a box terminal communication request signal, the second power transmission switch is a terminal potential switch unit, and the terminal potential switch unit disconnects a charging power supply provided by a potential input terminal to a terminal built-in battery in response to the first communication request signal so as to establish a communication connection with a charging device terminal connected to the potential input terminal; when the first communication request signal is a terminal communication request signal, the second power transmission switch is a box terminal potential switch unit, and the box terminal potential switch unit responds to the first communication request signal to disconnect the charging power supply output to the potential output terminal so as to establish communication connection with a terminal of the device to be charged connected to the potential output terminal.
In step S903, the second communication module establishes a communication connection with a request terminal connected to the potential transmission terminal through the potential transmission terminal. Specifically, after the second power transmission switch disconnects the charging power supply of the potential transmission terminal, the second communication module may multiplex the potential transmission terminal for communication. In this embodiment, the second communication module responds to the first communication request signal to provide a response signal, and transmits the response signal to the communication request terminal through the potential transmission terminal, so as to establish a communication connection with the request terminal connected to the potential transmission terminal.
In the charging and communication circuit and method, and the charging device, the accessory, and the system thereof disclosed in the present embodiment, the box-end communication module generates a box-end communication request signal and transmits the box-end communication request signal to the potential output terminal, and the potential of the box-end communication request signal is not equal to the high potential and the low potential of the potential output terminal when the charging power is provided, so that the requested terminal can recognize the box-end communication request signal; the path establishing module is used for disconnecting the charging power supply output to the potential output end according to the box end communication request signal, so that potential interference caused by the charging power supply is reduced, the identification degree of the communication connection request is improved when the terminal connected to the potential output end requests to establish communication connection, and the communication connection request is initiated more pertinently and effectively.
In addition, in the scheme disclosed by the embodiment of the invention, the communication connection request is initiated by adopting a mode different from a high potential and a low potential when the potential output end provides the charging power supply, and compared with the mode of requesting in a continuous low level mode in the prior art, the probability of misjudgment when the charging contact is always in a low level state can be reduced.
In the alternative scheme disclosed by the embodiment of the invention, the charging communication circuit comprises the charging switch module, so that the working mode of the charging equipment end can be enriched, and the working mode of the charging box can be controlled by a single control chip through the cooperation of the charging switch module.
It will be understood that the embodiments described above are illustrative only and not restrictive, and that various obvious and equivalent modifications and substitutions for details described herein may be made by those skilled in the art without departing from the basic principles of the invention.

Claims (21)

1. A communication circuit, comprising:
the box end communication module is used for generating a box end communication request signal and transmitting the box end communication request signal to the potential output end, wherein the potential of the box end communication request signal is not equal to the high potential and the low potential when the potential output end provides a charging power supply;
and the path establishing module is used for disconnecting the charging power supply output to the potential output end according to the box terminal communication request signal so as to request to establish communication connection to the terminal connected to the potential output end.
2. The communication circuit of claim 1, wherein the box-end communication module comprises:
the box end signal sending channel is used for transmitting a box end communication request signal to the potential output end; and the box end signal sending channel is in a closed state when the potential output end works in a charging mode.
3. The communication circuit of claim 1,
the box end communication module is also used for sensing a machine end communication request signal received by the electric potential output end;
the channel establishing module responds to the machine end communication request signal to generate a box end response signal and transmits the box end response signal to the electric potential output end so as to establish communication connection with a machine end; the electric potential of the terminal communication request signal is not equal to the high electric potential and the low electric potential when the electric potential output end provides the charging power supply; the electric potential of the box end response signal is not equal to the high electric potential and the low electric potential when the electric potential output end provides the charging power supply.
4. The communication circuit of claim 3, wherein the box-end communication module comprises:
the box end signal receiving channel is used for receiving the machine end communication request signal received by the electric potential output end; and the box end signal receiving channel is in an open state when the potential output end works in a charging mode.
5. The communication circuit of claim 4, wherein the box-end signal receiving path comprises:
and the box end comparator group is used for comparing the electric signals received by the potential output end and outputting a comparison result of the received terminal communication request signal when the received electric signals are in a preset interval.
6. The communication circuit of claim 4 or 5,
the two box end signal receiving channels are used for respectively receiving communication signals of a first machine end and communication signals of a second machine end;
and the two box end signal sending channels are used for sending box end communication signals to the first machine end and sending box end communication signals to the second machine end respectively.
7. A communication circuit, comprising: the terminal communication module of box, treater, route establish the module, wherein:
the path establishing module comprises a potential switch unit and a current mirror, wherein the potential switch unit is connected between a charging power supply and a potential output end (C1); the current mirror is connected in parallel with the input end and the output end of the potential switch unit, and the control end of the current mirror is connected to the processor;
the control end of the potential switch unit, the processor and the box end communication module are sequentially connected;
the box-end communication module is used for generating a box-end communication request signal and transmitting the box-end communication request signal to a potential output end (C1), and the box-end communication request signal is used for requesting to establish communication connection to a machine end connected to the potential output end (C1); the potential of the box terminal communication request signal is not equal to the high potential and the low potential when the potential output terminal provides the charging power supply;
the processor outputs a switching control signal to turn off the potential switch unit in response to the communication request signal;
the box-end communication module includes: a first comparator, a second comparator and a logic device; the input of the first comparator and the input of the second comparator are connected to the potential output (C1); the output end of the first comparator and the output end of the second comparator are connected to the logic device, and the logic device determines that a receiver-end communication request signal is received when the first comparator outputs a comparison result larger than a first threshold value and the second comparator outputs a comparison result smaller than a second threshold value; and the processor excites the current mirror to generate a response electric signal under the trigger of the terminal communication request signal and transmits the response electric signal to the potential output terminal.
8. A charging communication circuit, comprising:
the communication circuit of any of claims 1-7;
and the charging switch module comprises a plurality of switches and responds to the switching control signal to switch the working mode of the charging equipment.
9. The charging communication circuit of claim 8, wherein the charging switch module comprises:
a first changeover switch (K21) having one end connected to the built-in battery end of the charging device and the other end connected to a junction (Q) of the charging power supply and the built-in battery peripheral circuit;
the switching control signal comprises a first switching control signal;
the first switch (K21) is turned on or off in response to a first switching control signal to switch a mode in which the charging power supply charges a built-in battery or a mode in which the charging power supply supplies power to the peripheral circuit. Further, the charging switch module further includes:
a second switch (K22) connected between the other end of the first switch (K21) and ground;
the switching control signal comprises a second switching control signal;
the second switch (K22) is responsive to a second switching control signal to open when the first switch (K21) is on and to close when the first switch (K21) is off. Optionally, the switching control signal includes a third switching control signal and a fourth switching control signal; the charging switch module multiplexes the potential switch unit;
the potential switch unit responds to a third switching control signal and a fourth switching control signal respectively to switch a machine terminal charging path from a charging power supply to a potential output terminal;
the terminal charging path includes: the charging path from the charging power supply output power supply to the first potential output end, the charging path from the charging power supply output power supply to the second potential output end, and the charging path from the charging power supply output power supply to the first potential output end and the second potential output end. Further, the charging switch module further includes:
a power switch connected between the charging power source and the junction (Q);
the switching control signal includes a power control signal, and the power switch is turned on or off in response to the power control signal.
10. The charging communication circuit according to claim 8 or 9, wherein the switching control signals of the respective switches in the charging switch module are from the same processor.
11. A charging communication circuit, comprising:
the terminal switch unit is connected between a potential receiving terminal and a terminal built-in battery, and the potential receiving terminal is used for providing a charging power supply for the terminal built-in battery;
the terminal communication module is used for responding to a box terminal communication request signal received by the electric potential receiving terminal to turn off the terminal switch unit so as to disconnect a charging power supply provided by the electric potential receiving terminal to the terminal built-in battery; the potential of the box terminal communication request signal is not equal to the high potential and the low potential when the potential receiving terminal provides the charging power supply.
12. The charging communication circuit of claim 11, wherein said terminal communication module comprises:
the terminal signal receiving channel is used for receiving the box terminal communication request signal received by the electric potential receiving terminal; the signal receiving channel at the terminal is in an open state when the electric potential receiving terminal works in a charging mode. Further, the signal receiving channel at the end comprises:
and the terminal comparator group is used for comparing the electric signals received by the electric potential receiving terminal and outputting a comparison result of the received box terminal communication request signals when the received electric signals are in a preset interval.
13. The charging communication circuit according to claim 11 or 12, wherein the terminal communication module is further configured to generate a terminal communication request signal and transmit the terminal communication request signal to the potential receiving terminal, and the terminal switching unit disconnects the charging power supplied from the potential receiving terminal to the terminal built-in battery in response to the terminal communication request signal. Optionally, the terminal communication module includes:
the electric potential receiving end is used for transmitting an electric potential receiving end signal to the electric potential receiving end; and the signal sending channel at the machine end is in a closed state when the electric potential receiving end works in a charging mode.
14. A charging device, comprising:
the communication circuit according to any one of claims 1 to 7, or the charging communication circuit according to any one of claims 8 to 10. Further characterized in that the charging device is a charging box or a portable power source.
15. A charging device, comprising:
the wired communication module is used for providing a box terminal communication request signal to request to establish communication connection with a terminal in a wired charging process; the potential of the box end communication request signal is not equal to the high potential and the low potential when the charging power supply is provided.
16. A fitting, comprising:
the charging communication circuit of any one of claims 11-13. The wireless earphone is characterized in that the accessory is a wireless earphone.
17. An intelligent terminal, comprising:
the intelligent terminal is local;
the accessory of claim 16, interacting with data locally with the smart terminal.
18. A communication system, comprising:
the communication circuit according to any one of claims 1 to 7, or the charging communication circuit according to any one of claims 8 to 10; and the number of the first and second groups,
a charging communication circuit according to any of claims 11-13, wherein said potential output terminal (C1) and said potential receiving terminal (C3) are detachably connected.
19. A charging communication system, comprising:
the charging device of any one of claims 14-15; and the number of the first and second groups,
the fitting of claim 16.
20. A charging communication system, comprising:
the charging device of any one of claims 14-15; and the number of the first and second groups,
the intelligent terminal of claim 17; after the charging equipment is connected with the accessory, data interaction is carried out between the intelligent terminal local machine and the charging equipment through the accessory.
21. A charging communication method, comprising:
the first communication module generates a first communication request signal and transmits the first communication request signal to the potential transmission end, wherein the potential of the first communication request signal is not equal to the high potential and the low potential when the potential transmission end provides a charging power supply;
the first power transmission switch responds to the first communication request signal to disconnect the charging power supply of the potential transmission terminal;
the first communication module establishes communication connection with a requested terminal connected to the potential transmission terminal through the potential transmission terminal. Alternatively, it comprises:
the second communication module judges whether the potential transmission end receives a first communication request signal requesting to establish communication connection from a receiving request end, wherein the potential of the first communication request signal is not equal to the high potential and the low potential when the potential transmission end provides a charging power supply; optionally, the second communication module determines whether the first communication request signal is received during a charging window period;
if the potential transmission terminal receives the first communication request signal, the second power transmission switch responds to the first communication request signal provided by the second communication module to disconnect the charging power supply of the potential transmission terminal;
and the second communication module establishes communication connection with a request terminal connected with the potential transmission terminal through the potential transmission terminal.
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