CN109638911B

CN109638911B - Charging communication circuit, system and method, intelligent terminal and accessory thereof

Info

Publication number: CN109638911B
Application number: CN201811535121.0A
Authority: CN
Inventors: 龙树生; 罗广君
Original assignee: Zhuhai Jieli Technology Co Ltd
Current assignee: Zhuhai Jieli Technology Co Ltd
Priority date: 2018-12-14
Filing date: 2018-12-14
Publication date: 2020-08-25
Anticipated expiration: 2038-12-14
Also published as: CN109638911A

Abstract

A charging communication circuit, a system and a method, an intelligent terminal and accessories thereof comprise: the potential receiving end is used for receiving the power transmitted by the charging equipment after the potential receiving end is connected with the charging equipment; the power supply is configured to a first potential and a second potential signal set at least in part, wherein at least one of the first potential and the second potential is a charging potential, so as to provide working power supply for the equipment to be charged; the second potential analysis module is connected with the potential receiving end; the second potential analyzing module is used for analyzing the first potential and the second potential signal set to obtain a digital signal sequence, wherein the first potential is not equal to the second potential so as to obtain information transmitted by the charging equipment terminal. The complexity of a hardware circuit structure is reduced, and the circuit structure is simple and compact. Compared with the prior art, the charging communication circuit is simple in structure and few in added components, so that the stability and the reliability of the circuit structure are improved compared with the prior art.

Description

Charging communication circuit, system and method, intelligent terminal and accessory thereof

Technical Field

The invention relates to the technical field of electronics, in particular to a charging communication circuit, a charging communication system, a charging communication method, an intelligent terminal and accessories of the intelligent terminal.

Background

With the development of technology, wireless headsets (such as wireless 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; after the earphone is pulled out of the charging box, the wireless earphone is started; a key pairing function on the wireless headset charging box, and the like.

In the traditional scheme, in a charging box and a wireless earphone which are charged by contacting two power contacts, a no-load detection circuit in the charging box is used for detecting whether the output of the charging box is suspended, namely the charging box detects whether the wireless earphone is in the charging box; when a charging current detection circuit in the charging box detects that the output of the charging box is connected with a device to be charged, the charging current of the charging box is detected, and whether the battery in the earphone is fully charged or not is judged. However, in the charging process of the wireless headset, the current may change, and therefore, the information exchange between the charging box and the wireless headset is realized by the analog quantity detection method, which is single and not necessarily reliable, for example, the charging box determines whether the battery in the headset is fully charged by the charging current of the wireless headset, when the battery charging module in the headset charges and protects the battery, the battery in the headset is not fully charged, and the charging current of the charging box to the headset may become small, so that the charging box may misjudge the electric quantity of the battery in the headset. Also, for some complex functions, such as key pairing functions on a wireless headset charging box: there are two wireless to ear wireless earphones in the box that charges, press a button of box that charges through the user, two wireless earphones start to automatic interconnect becomes to ear wireless earphone, then external terminal can retrieve wireless earphone and mate. At present, the charging box and the wireless earphone which are connected only by two power contacts are contacted cannot reliably realize the function, however, the cost and the unreliability are obviously increased by increasing the contact between the charging box and the wireless earphone.

In the prior art, in order to realize communication between the charging box and the wireless headset in the charging process, a communication circuit and a switching circuit are generally added at two ends of the charging box and the wireless headset respectively, specifically: the communication circuit adopts frequency modulation (such as a mixing mode) to load communication information; the switching circuit is used for realizing the switching of the working modes of the charging mode and the communication mode, namely, in the charging process, the switching between the communication mode and the charging mode is realized by the time-sharing multiplexing power supply contact through the switching of the working modes. However, when communication is performed by using the frequency modulation method, the hardware aspect is: devices or functional modules such as a mixer, a signal modulator, a signal demodulator and a filter need to be added; in terms of signal processing: a series of operations of mixing, modulation, demodulation, etc. are required. The hardware circuit is added at the charging box or the wireless earphone end, so that the circuit structure becomes complicated, and the reliability of the system is reduced due to the addition of excessive hardware circuits; in addition, the signal processing process is complicated.

Therefore, how to reduce the complexity of the hardware circuit structure to implement charging communication becomes a first technical problem to be solved urgently.

In addition, how to communicate with the charging device when the terminal to be charged is dead or insufficient in electric quantity becomes a second technical problem to be solved urgently; thirdly, how to reduce the complexity of the hardware circuit structure to express the communication information in the charging process becomes a third technical problem to be solved urgently; or, how to implement parallel power supply or reception and communication information transmission or reception in the charging process without adding a signal receiving end is a fourth technical problem to be solved urgently.

Disclosure of Invention

Based on the technical problems to be solved in the prior art, the invention provides a charging communication circuit, a charging communication system, a charging communication method, an intelligent terminal and accessories thereof.

To this end, according to a first aspect, an embodiment of the present invention discloses a charging communication circuit, including:

the potential receiving end is used for receiving the power transmitted by the charging equipment after the potential receiving end is connected with the charging equipment; the power supply is configured to a first potential and a second potential signal set at least in part, wherein at least one of the first potential and the second potential is a charging potential, so as to provide working power supply for the equipment to be charged; the second potential analysis module is connected with the potential receiving end; the second potential analyzing module is used for analyzing the first potential and the second potential signal set to obtain a digital signal sequence, wherein the first potential is not equal to the second potential so as to obtain information transmitted by the charging equipment terminal.

Multiplexing a potential receiving end for receiving a power supply, wherein the received power supply is configured to be a first potential and a second potential signal set at least in part of time period, and on one hand, at least one of the first potential and the second potential is a charging potential, so that the charging power supply can be provided for the equipment to be charged; on the other hand, the first potential and the second potential are not equal, so that in the process of receiving the power supply provided by the charging device, the second potential analyzing module can analyze the first potential and the second potential signal set to obtain a digital signal sequence, and then, information transmitted by the charging device can be obtained. Namely, the power receiving and communication can be realized through the multiplexing potential receiving end and the second potential analyzing module. Compared with the prior art, under the condition that a signal receiving end is not added, a single working mode of serial charging or communication is needed, the scheme of the embodiment can realize parallel receiving of power supply and communication information in the same time period under the condition that a signal output end is not added, and compared with the scheme of providing power supply and communication by multi-contact, the complexity of a hardware circuit structure is reduced, and the circuit structure is simple and compact. Compared with the prior art, the charging communication circuit is simple in structure and few in added components, so that the stability and the reliability of the circuit structure are improved compared with the prior art.

According to a second aspect, an embodiment of the present invention discloses a charging communication circuit, including:

a second comparator, a reference voltage circuit, and a second controller, wherein: the input end of the second comparator is used for being connected to a potential receiving end of the equipment to be charged, the reference end of the second comparator is connected to the reference voltage circuit, and the output end of the second comparator is connected to the second controller; the reference voltage circuit is used for providing a reference voltage for the reference end of the second comparator; the input end of the second comparator is used for inputting a first potential and a second potential signal set received by the potential receiving end, and the first potential and the second potential can both meet the working potential required by equipment at the equipment end to be charged in the communication process; the second comparator compares the first potential signal set and the second potential signal set received by the input end of the second comparator with the reference voltage respectively to output a digital signal sequence; and the second controller is used for obtaining the information transmitted by the charging equipment terminal according to the digital signal sequence.

In the charging communication circuit disclosed by the embodiment of the invention, the input end of the second comparator is used for being connected to the potential receiving end of the equipment to be charged, the second comparator inputs the first potential and the second potential signal set received by the potential receiving end and compares the received signal sets with the reference voltage respectively to output the digital signal sequence, and the second controller can obtain the information transmitted by the charging equipment end according to the digital signal sequence, namely, the receiving of communication information is realized; and the first potential and the second potential can both meet the working potential required by the equipment at the equipment end to be charged in the communication process, so that when the equipment at the equipment end to be charged is out of power or the electric quantity is insufficient, the power supply can be realized through the charging communication circuit, and the communication work is completed. In the scheme disclosed by the embodiment of the invention, the communication information sent by the charging equipment terminal can be analyzed by utilizing the comparator and the controller on the basis of the original circuit of the equipment, and the circuit structure is simple and compact. In addition, compared with the prior art, the charging communication circuit provided by the embodiment of the invention has a simple structure and few added components, so that the stability and reliability of the circuit structure are improved compared with the prior art.

According to a third aspect, an embodiment of the present invention discloses a charging communication method, including:

the potential receiving end shunts the power transmitted by the charging equipment to the second potential analyzing module; the power supply is configured to a first potential and a second potential signal set at least one of which is a charging potential for at least a part of a period; the second potential analysis module analyzes the first potential and the second potential signal set to obtain a digital signal sequence; the first potential is not equal to the second potential; the second potential analysis module transmits the digital signal sequence to a second controller; and the second controller obtains the information transmitted by the charging equipment terminal according to the digital signal sequence.

According to a fourth aspect, an embodiment of the present invention discloses a charging communication system, including:

voltage boost unit, electronic switch, first controller, electric potential output, electric potential receiving terminal, second comparator, reference voltage circuit and second controller, wherein: the potential output end and the potential receiving end are detachably connected; the input end of the voltage boosting unit is used for being connected to a charging power supply; the voltage boosting unit is used for boosting the potential of the charging power supply to a first potential; the first input end of the electronic switch is connected to the output end of the voltage boosting unit, the second input end of the electronic switch is used for being connected to a charging power supply, and the output end of the electronic switch is connected to the potential output end; the first controller is used for generating a first control signal, and the first control signal is used for representing first communication information; the electronic switch responds to a received first control signal and is switched and conducted to the first input end or the second input end so as to switch and output a first potential and a second potential, the second potential is the potential of the charging power supply, the first potential and the second potential meet the potential required by the work of the equipment end to be charged, and the first potential and the second potential are not equal; the input end of the second comparator is used for being connected to the potential receiving end, the reference end of the second comparator is connected to the reference voltage circuit, and the output end of the second comparator is connected to the second controller; the reference voltage circuit is used for providing a reference voltage for the reference end of the second comparator; the input end of the second comparator is used for inputting a first potential and a second potential signal set received by the potential receiving end; the second comparator compares the first potential signal set and the second potential signal set received by the input end of the second comparator with the reference voltage respectively to output a digital signal sequence; the second controller is used for obtaining the first communication information according to the digital signal sequence.

In the scheme disclosed by the embodiment of the invention, on the basis of the original circuit of the equipment, for the charging equipment end, the communication information provided by the controller can be expressed by utilizing the cooperation of the voltage boosting unit and the electronic switch; for the equipment end to be charged, the communication information sent by the charging equipment end can be analyzed by using the comparator and the controller. Compared with the prior art, the circuit structure complexity of the hardware is reduced, communication in the charging process is realized, and the circuit structure is simple and compact. In addition, compared with the prior art, the charging communication system provided by the embodiment of the invention has a simple structure and a few added components, so that the stability and reliability of the circuit structure are improved compared with the prior art.

According to a fifth aspect, an embodiment of the invention discloses a fitting, comprising:

the charging communication circuit of the first aspect or any possible implementation manner of the first aspect; alternatively, the charging communication circuit in the second aspect or any possible implementation manner of the second aspect is included.

According to a sixth aspect, an embodiment of the invention discloses a fitting, comprising:

the potential receiving end is used for receiving the power transmitted by the charging equipment after being connected to the charging equipment; the power supply is configured for at least a partial period of time to a first potential and a second sequence of potentials; at least one of the first potential and the second potential is a charging potential for charging; the first potential and the second potential are not equal, and the first potential and the second potential sequence are analyzed in the process of receiving the power transmitted by the charging equipment so as to obtain information transmitted by the charging equipment.

Multiplexing a potential receiving end for receiving a power supply, wherein the received power supply is configured to be a first potential and a second potential signal set at least in part of time period, and on one hand, at least one of the first potential and the second potential is a charging potential, so that the charging power supply can be provided for the equipment to be charged; on the other hand, the first potential and the second potential are not equal, so that the first potential and the second potential sequence can be analyzed in the process of receiving the power supply provided by the charging equipment, and then, the information transmitted by the charging equipment terminal can be obtained. That is, by multiplexing the potential receiving terminals, it is possible to realize both the reception of power and the analysis of communication information. Compared with the prior art, under the condition that a signal receiving end is not added, a single working mode of serial charging or communication is needed, and the scheme of the embodiment can realize parallel receiving of power supply and communication information in the same time period under the condition that a signal output end is not added.

According to a seventh aspect, an embodiment of the present invention discloses an intelligent terminal, including:

the intelligent terminal is local; an accessory as in any possible implementation of the above-described fifth aspect or fifth aspect, or as in any possible implementation of the above-described sixth aspect or sixth aspect; and the accessory performs data interaction with the intelligent terminal local computer.

According to an eighth aspect, an embodiment of the present invention discloses a charging communication system, including:

the charging communication circuit of the first aspect or any possible implementation manner of the first aspect; alternatively, the charging communication circuit in the second aspect or any possible implementation manner of the second aspect is included; the charging communication circuit of the charging equipment end comprises a potential output end; the potential output end and the potential receiving end can be separately connected for information transmission.

According to a ninth aspect, an embodiment of the present invention discloses a charging communication system, including:

an accessory as in any possible implementation of the above-described fifth aspect or fifth aspect, or as in any possible implementation of the above-described sixth aspect or sixth aspect; and the accessory is detachably connected with the charging device for information transmission.

According to a tenth aspect, an embodiment of the present invention discloses a charging communication system, including:

a charging device; the intelligent terminal in any possible implementation manner of the ninth aspect or the ninth aspect; 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.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of a charging communication circuit for a charging device disclosed in embodiment 1 of the present application;

fig. 2 is a schematic structural diagram of a charging communication circuit for a device to be charged disclosed in embodiment 1 of the present application;

fig. 3 is a schematic structural diagram of a charging communication system disclosed in embodiment 1 of the present application;

fig. 4 is a schematic diagram of an example structure of a charging communication circuit for a charging device disclosed in embodiment 2 of the present application;

fig. 5 is a schematic diagram of a second exemplary structure of a charging communication circuit for a charging device disclosed in embodiment 2 of the present application;

fig. 6 is a schematic structural diagram of a third example of a charging communication circuit for a charging device disclosed in embodiment 2 of the present application;

fig. 7 is a schematic diagram of a fourth exemplary structure of a charging communication circuit for a charging device disclosed in embodiment 2 of the present application;

fig. 8 is a schematic diagram of a fifth exemplary structure of a charging communication circuit for a charging device disclosed in embodiment 2 of the present application;

fig. 9 is a schematic structural diagram of an example of a first potential analyzing module disclosed in embodiment 2 of the present application;

fig. 10 is a schematic diagram of a sixth exemplary structure of a charging communication circuit for a charging device disclosed in embodiment 2 of the present application;

fig. 11 is a flowchart of a charging communication method for a charging device disclosed in embodiment 2 of the present application;

fig. 12 is a schematic diagram of an example structure of a potential switching circuit for a charging communication circuit disclosed in embodiment 2 of the present application;

fig. 13 is a schematic diagram of a second exemplary structure of a potential switching circuit for a charging communication circuit disclosed in embodiment 2 of the present application;

fig. 14 is a schematic structural diagram of a third example of a potential switching circuit for a charging communication circuit disclosed in embodiment 2 of the present application;

fig. 15 is a schematic diagram illustrating a fourth exemplary structure of a potential switching circuit for a charging communication circuit disclosed in embodiment 2 of the present application;

fig. 16 is a schematic diagram of a fifth exemplary structure of a potential switching circuit for a charging communication circuit disclosed in embodiment 2 of the present application;

fig. 17 is a schematic structural diagram of an example of a charging device disclosed in embodiment 2 of the present application;

fig. 18 is a schematic structural diagram of a second example of a charging device disclosed in embodiment 2 of the present application;

fig. 19 is a schematic structural diagram of a charging communication circuit for a device to be charged disclosed in embodiment 3 of the present application;

fig. 20 is a schematic structural diagram of a second charging communication circuit for a device to be charged disclosed in embodiment 3 of the present application;

fig. 21 is a schematic structural diagram of a third charging communication circuit for a device to be charged disclosed in embodiment 3 of the present application;

fig. 22 is a flowchart of a charging communication method for a device to be charged disclosed in embodiment 3 of the present application;

FIG. 23 is a schematic diagram of an exemplary construction of a fitting disclosed in embodiment 3 of the present application;

FIG. 24 is a second exemplary structural schematic view of a fitting disclosed in embodiment 3 of the present application;

fig. 25 is a schematic diagram of an intelligent terminal disclosed in an embodiment of the present application;

fig. 26 is a schematic diagram illustrating a potential analysis principle of a charging communication system according to an embodiment of the present application;

fig. 27 is a schematic block diagram of a charging communication system according to an embodiment of the present application.

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 implement communication during charging, the present embodiment discloses a charging communication circuit, which is suitable for a charging power supply terminal (hereinafter referred to as a charging device terminal), please refer to fig. 1, which is a schematic structural diagram of the charging communication circuit disclosed in the present embodiment, in which the charging device generally includes a potential output terminal C1 and a ground terminal C2, and when the potential output terminal C1 and the ground terminal C2 are respectively connected to power terminals of a device to be charged, the charging device can provide power to the device to be charged through the potential output terminal C1 and the ground terminal C2. The charging communication circuit disclosed in the present embodiment includes: voltage step-up unit 11, electronic switch S1 and first controller 3, wherein:

the input terminal of the voltage boosting unit 11 is for connecting to the charging POWER supply POWER +, and the voltage boosting unit 11 is for boosting the potential of the charging POWER supply to a first potential. In this embodiment, the charging POWER supply + may be a POWER supply provided by a battery of the charging device, or may be a POWER supply received by the charging device from the outside, for example, a POWER supply received through a POWER line. In a specific implementation process, after the input end of the voltage boosting unit 11 receives the charging POWER supply +, the voltage boosting unit may boost the potential of the charging POWER supply + to the first potential and then output the first potential through the output end. In this embodiment, the first potential may be determined according to actual requirements, and the specific values of the first potential and the POWER + potential of the charging POWER supply are not limited in this embodiment.

The electronic switch S1 includes a first input terminal and a second input terminal, the first input terminal of the electronic switch S1 is connected to the output terminal of the voltage boosting unit 11, the second input terminal of the electronic switch S1 is for connecting to the charging POWER supply, and the output terminal of the electronic switch S1 is for connecting to the device to be charged. In a specific embodiment, the output of the electronic switch S1 may be connected to the device to be charged through the potential output C1. In the implementation process, since the output terminal of the electronic switch S1 and the potential output terminal C1 have the same potential, the two terminals can be regarded as the same terminal.

The first controller 3 is connected to the electronic switch S1, and in this embodiment, the first controller 3 is configured to generate a first control signal, and the first control signal is used for representing the first communication information. In this embodiment, the first communication information refers to communication information to be transmitted by the charging device, for example, "query electric quantity," "accessory pairing," "earphone-to-ear," "charging device terminal electric quantity," and the like. In a specific embodiment, the first controller 3 may encode the first communication information according to a preset encoding rule to form the first control signal. In this embodiment, the first control signal is a digital signal sequence, and specifically, the digital signal sequence may include, for example: any combination of initial, data, check, end, or other bits, etc.

The electronic switch S1 is switched to be turned on to the first input terminal or the second input terminal in response to the received first control signal to switch and output a first potential and a second potential, where the second potential is a potential of the charging POWER supply +. In this embodiment, the second potential is the potential of the POWER supply POWER +, so that the potential required for the operation of the device to be charged can be satisfied, and the first potential is the potential of the POWER supply POWER + after being boosted, so that the potential required for the operation of the device to be charged can be satisfied, so that the first potential and the second potential satisfy the potential required for the operation of the device to be charged, so as to provide POWER for the device to be charged; in this embodiment, the first potential and the second potential are not equal to transmit information to the device to be charged in the process of supplying power to the device to be charged.

In this embodiment, the first potential and the second potential satisfy the potential required by the device to be charged for operating, so that the communication operation can be performed even when the device at the device to be charged is dead or insufficient in power. In this embodiment, the second potential is the potential of the POWER supply POWER +, which can multiplex the existing resources of the circuit and reduce the complexity of the charging communication circuit.

The charging communication circuit disclosed in this embodiment boosts the potential of the charging power supply to a first potential through the voltage boosting unit, and the electronic switch switches and outputs the first potential and a second potential in response to a first control signal generated by the first controller and used for representing first communication information, and the first potential and the second potential meet the potential required by the operation of the device to be charged. The device to be charged is provided with the power supply through switching the first potential and the second potential, and information is transmitted to the device to be charged in the process of providing the power supply. In addition, in the scheme disclosed by the embodiment of the invention, on the basis of the original circuit of the equipment, the communication information provided by the controller can be expressed by utilizing the cooperation of the voltage boosting unit and the electronic switch, so that the structural complexity of a hardware circuit is reduced, and the circuit structure is simple and compact. In addition, compared with the prior art, the charging communication circuit provided by the embodiment of the invention has a simple structure and few added components, so that the stability and reliability of the circuit structure are improved compared with the prior art.

The embodiment discloses a charging communication circuit, which is suitable for a to-be-charged device, and in a specific embodiment, the to-be-charged device is a device used in cooperation with the to-be-charged device in the above embodiment, for example, the to-be-charged device may be an intelligent wearable device such as an earphone and a bracelet, and further, the to-be-charged device may be an audio-visual device such as MP3 and MP4, and may also be an intelligent accessory with data processing capability and matched with an intelligent terminal. Referring to fig. 2, a schematic structural diagram of a charging communication circuit disclosed in this embodiment is shown, in which a device to be charged generally includes a potential receiving terminal C3 and a common terminal C4, and after the potential receiving terminal C3 and the common terminal C4 are respectively connected to power terminals of a charging device, the device to be charged can receive power provided by the charging device through the potential receiving terminal C3 and the common terminal C4. The charging communication circuit disclosed in the present embodiment includes: a second comparator 311, a reference voltage circuit 312, and a second controller 33, wherein:

the input terminal of the second comparator 311 is used for being connected to the potential receiving terminal C3 of the device to be charged, the reference terminal of the second comparator 311 is connected to the reference voltage circuit 312, and the output terminal of the second comparator 311 is connected to the second controller 33.

The reference voltage circuit 312 is used for providing a reference voltage to the reference terminal of the second comparator 311. Specifically, the reference voltage circuit 312 is connected to a reference voltage terminal of the second comparator 311, and the reference voltage circuit 312 is configured to provide a reference voltage to the second comparator 311. In a specific embodiment, the working power of the reference voltage circuit 312 may be provided by the potential receiving terminal C3, i.e., the reference voltage circuit 312 is connected between the potential receiving terminal C3 and the reference voltage terminal of the second comparator 311. In this embodiment, the potential receiving terminal C3 provides the operating power source for the reference voltage circuit 312, so that when the device to be charged is dead or low in power, the power source required for the operation of the reference voltage circuit 312 can be provided by the charging power of the charging device.

The input end of the second comparator 311 is used for inputting the first potential and the second potential signal set received by the potential receiving end C3, and both the first potential and the second potential can satisfy the working potential required by the device at the device end to be charged in the communication process. In this embodiment, the second comparator 311 compares the first potential and the second potential signal set received at its input terminals with the reference voltage respectively to output a digital signal sequence. Specifically, since the first potential and the second potential are not equal, a reference potential is set between the first potential and the second potential, and the first potential and the second potential can output high and low level digital signals after being compared with the reference potential, that is, a first potential and a second potential signal set representing the first communication information can be converted into more regular digital signal sequences, and the digital signal sequences can be read by a logic control device or a controller. As an alternative embodiment, the second comparator 311 may be an existing general comparator, preferably a schmitt trigger, to reduce the glitch of the compared output signal.

The second controller 33 is configured to obtain the information transmitted by the charging device according to the digital signal sequence. In a specific embodiment, the second controller 33 parses the digital signal sequence according to a decoding rule adapted to the preset encoding rule of the first controller to obtain the information transmitted by the charging device.

In the charging communication circuit disclosed in this embodiment, the input end of the second comparator is used for being connected to the potential receiving end of the device to be charged, the second comparator inputs the first potential and the second potential signal set received by the potential receiving end, and compares the received signal sets with the reference voltage respectively to output the digital signal sequence, and the second controller can obtain the information transmitted by the charging device end according to the digital signal sequence, that is, the receiving of the communication information is realized; and the first potential and the second potential can both meet the working potential required by the equipment at the equipment end to be charged in the communication process, so that when the equipment at the equipment end to be charged is out of power or the electric quantity is insufficient, the power supply can be realized through the charging communication circuit, and the communication work is completed. In the scheme disclosed by the embodiment of the invention, the communication information sent by the charging equipment terminal can be analyzed by utilizing the comparator and the controller on the basis of the original circuit of the equipment, and the circuit structure is simple and compact. In addition, compared with the prior art, the charging communication circuit provided by the embodiment of the invention has a simple structure and few added components, so that the stability and reliability of the circuit structure are improved compared with the prior art.

Referring to fig. 3, a schematic circuit structure diagram of a charging communication system disclosed in this embodiment is shown, where the charging communication system includes: the voltage boosting unit 11, the electronic switch S1, the first controller 3, the potential output terminal C1, the potential receiving terminal C3, the second comparator 311, the reference voltage circuit 312, and the second controller 33, wherein:

the potential output terminal C1 and the potential receiving terminal C3 are detachably connected. In an embodiment, the connection between the potential output terminal C1 and the potential receiving terminal C3 may be an existing connection, or may be a connection that may appear in the future. In this embodiment, only after the potential output terminal C1 and the potential receiving terminal C3 are connected, the electrical signal transmission between the two terminals can be realized.

The input end of the voltage boosting unit 11 is used for being connected to a charging POWER supply POWER +; the voltage boosting unit 11 is configured to boost a potential of the charging power supply to a first potential; a first input terminal of the electronic switch S1 is connected to the output terminal of the voltage boosting unit 11, a second input terminal of the electronic switch S1 is for connection to the charging POWER supply POWER +, and an output terminal of the electronic switch S1 is connected to the potential output terminal C1.

The first controller 3 is used for generating a first control signal, and the first control signal is used for representing first communication information; the electronic switch S1 switches to be conducted to the first input terminal or the second input terminal in response to the received first control signal to switch to output a first potential and a second potential, where the second potential is a potential of the charging POWER supply +, the first potential and the second potential satisfy a potential required by the device to be charged to operate, and the first potential and the second potential are not equal to each other.

The input terminal of the second comparator 311 is configured to be connected to the potential receiving terminal C3, the reference terminal of the second comparator 311 is connected to the reference voltage circuit 312, and the output terminal of the second comparator 311 is connected to the second controller 33.

The reference voltage circuit 312 is used for providing a reference voltage to the reference terminal of the second comparator 311. The input end of the second comparator 311 is used for inputting the first potential and the second potential signal set received by the potential receiving end C3; the second comparator 311 compares the first potential signal set and the second potential signal set received at its input terminals with the reference voltage respectively to output a digital signal sequence; the second controller 33 is configured to obtain the first communication information according to the digital signal sequence.

To facilitate understanding by those skilled in the art, as an example scenario, a charging box (charging device) and a wireless headset (accessory) are described as examples, such as: the wireless earphone is respectively connected with the potential output end C1 and the grounding end C2 of the charging box through the potential receiving end C3 and the common grounding end C4, and a charging power supply provided by the charging box can be transmitted to the wireless earphone through the connected terminals to provide power for the wireless earphone. In the charging process, the first controller 3 may encode first communication information (for example, pairing the wireless headset) according to a preset encoding rule to obtain a first control signal; the electronic switch S1 switches between the first potential and the second potential in response to the first control signal, so that the potential of the potential output terminal C1 also switches between the first potential and the second potential. The wireless earphone end receives the switched first potential and second potential through the potential receiving end C3, the comparator 311 compares the first potential and second potential with the reference voltage respectively to obtain a digital signal sequence of high and low levels, and the second controller analyzes the digital signal sequence according to a preset decoding rule to obtain first communication information. The wireless headset may perform a corresponding operation (e.g., pairing) based on the first communication information.

It should be noted that the above exemplary descriptions are only for facilitating the technical solution understanding of the technicians in this field, and should not be construed as limiting the technical solution of the present embodiment. For example, in some application scenarios, information interaction such as power inquiry, ear-to-ear interaction and the like can also be performed.

In the scheme disclosed in this embodiment, on the basis of the original circuit of the device, for the charging device end, the communication information provided by the controller can be expressed by using the cooperation of the voltage boosting unit and the electronic switch; for the equipment end to be charged, the communication information sent by the charging equipment end can be analyzed by using the comparator and the controller. Compared with the prior art, the circuit structure complexity of the hardware is reduced, communication in the charging process is realized, and the circuit structure is simple and compact. In addition, compared with the prior art, the charging communication system provided by the embodiment of the invention has a simple structure and a few added components, so that the stability and reliability of the circuit structure are improved compared with the prior art.

Example 2

In order to implement communication during charging, the present embodiment discloses a charging communication circuit, which is suitable for a charging power supply terminal (hereinafter referred to as a charging device terminal), please refer to fig. 4, which is a schematic structural diagram of the charging communication circuit disclosed in the present embodiment, in which the charging device generally includes a potential output terminal C1 and a ground terminal C2, and when the potential output terminal C1 and the ground terminal C2 are respectively connected to power terminals of a device to be charged, the charging device can provide power to the device to be charged through the potential output terminal C1 and the ground terminal C2. The charging communication circuit disclosed in the present embodiment includes: potential output terminal C1, first potential switching module 1 and first controller 3, wherein:

the potential output end C1 is used for providing power for the device to be charged after being connected with the power supply end of the device to be charged. In this embodiment, the connection manner between the potential output terminal C1 and the power supply terminal of the device to be charged is not limited, as long as the potential output terminal C1 can provide power to the device to be charged after the potential output terminal C1 is connected to the power supply terminal of the device to be charged.

The first potential switching module 1 is connected to the potential output terminal C1. In a specific embodiment, the first potential switching module 1 is connected between a charging POWER supply POWER + and a potential output terminal C1, in this embodiment, the charging POWER supply POWER + may be a POWER supply provided by a battery of the charging device, or may be a POWER supply received by the charging device from the outside, for example, a POWER supply received through a POWER line. After receiving the voltage of the charging POWER supply POWER +, the first voltage switching module 1 can output the first voltage or the second voltage according to the voltage of the charging POWER supply POWER +.

The first controller 3 is connected to the first voltage level switching module 1, and the first controller 3 is configured to generate a first control signal. In a specific embodiment, the first controller 3 encodes the first communication information to obtain the first control signal. In this embodiment, the first communication information refers to communication information to be transmitted by the charging device, for example, "query electric quantity," "accessory pairing," "earphone-to-ear," "charging device terminal electric quantity," and the like. In a specific embodiment, the first controller 3 may encode the first communication information according to a preset encoding rule to form the first control signal. In this embodiment, the first control signal is a digital signal sequence, and specifically, the digital signal sequence may include, for example: any combination of initial, data, check, end, or other bits, etc.

The first potential switching module 1 switches between the first potential and the second potential in response to the first control signal, thereby outputting the switched first potential or second potential to the potential output terminal C1. In this embodiment, at least one of the first potential and the second potential is a charging potential to provide power to the device to be charged. The charging potential refers to a potential capable of providing charging power to the device to be charged. In this embodiment, the first potential and the second potential are not equal to each other, so that information is transmitted to the device to be charged in the process of supplying power to the device to be charged.

In this embodiment, at least one of the first potential and the second potential is a charging potential, so that the device to be charged can be charged for at least a part of the time period in the process of providing information to the device to be charged.

The charging communication circuit disclosed in this embodiment multiplexes a potential output terminal that provides a power supply, and the first potential switching module switches between a first potential and a second potential in response to a first control signal, so that the potential of the potential output terminal switches between the first potential and the second potential. On one hand, at least one of the first potential and the second potential is a charging potential, so that equipment at the equipment end to be charged can be charged through the potential output end; on the other hand, the first potential and the second potential are not equal, so that information can be transmitted to the device to be charged in the process of supplying power to the device to be charged. The first potential switching module is used for switching between a first potential and a second potential, and the potential output end is multiplexed, so that charging and communication transmission can be realized in the charging process. Compared with the prior art, only the first potential switching module is added, the structural complexity of a hardware circuit is reduced, and the circuit structure is simple and compact. In addition, compared with the prior art, the charging communication system provided by the embodiment of the invention has a simple structure and a few added components, so that the stability and reliability of the circuit structure are improved compared with the prior art.

In an embodiment, referring to fig. 4, the first voltage level switching module 1 disclosed in this embodiment includes: a first switch S1, the first switch S1 being connected to the potential output terminal C1; the first switch S1 switches the conducting state of the potential output terminal C1 under the trigger of the first control signal, and the conducting state of the potential output terminal C1 includes: the potential output terminal C1 is turned on with the potential terminal at which the first potential is present and the potential output terminal C1 is turned on with the potential terminal at which the second potential is present.

In a specific embodiment, the first potential switching module 1 includes: and the voltage conversion unit 11 is used for converting the potential of the charging power supply into a first potential. Specifically, the potential end where the first potential is located is the output end of the voltage conversion unit 11, that is, the first input end of the switch S1 is connected to the output end of the voltage conversion unit 11; in order to reuse the existing resources of the circuit as much as possible and reduce the complexity of the charging communication circuit, in an alternative embodiment, the potential terminal at which the second potential is located is the input terminal of the voltage converting unit 11, i.e., the second input terminal of the switch S1 is connected to the input terminal of the voltage converting unit 11.

Referring to fig. 5 and 6, the voltage converting unit 11 is a voltage boosting unit. The voltage boosting unit boosts the potential of the charging power supply and then outputs a first potential, wherein the first potential is the charging potential of the device to be charged. In one embodiment, referring to fig. 5, the voltage terminal at which the second voltage is located is the input terminal of the voltage converting unit 11, i.e. the second input terminal of the switch S1 is connected to the input terminal of the voltage converting unit 11, i.e. the second voltage is the voltage of the charging power source.

In another embodiment, referring to fig. 6, the second potential is zero, i.e., the second input terminal of the switch S1 is connected to the ground terminal. In a specific embodiment, the charging communication circuit disclosed in this embodiment further includes a ground terminal C2, where the ground terminal C2 is used for the common ground of the charging power supply and the device to be charged after the ground terminal is electrically connected to the device to be charged; the second potential is the potential of the ground terminal C2.

In the above embodiment, since the first potential is the charging potential of the device to be charged, the device to be charged can be charged by the first potential only by switching to the first potential during the communication process regardless of the level of the second potential.

When the second potential is the potential of the charging power supply, the first potential is higher than the second potential because the first potential is a boosted potential. When the potential of the charging power supply can meet the working potential required by the equipment at the charging equipment end in the communication process, the first potential and the second potential can both meet the working potential required by the equipment at the equipment end to be charged in the communication process. The device at the device end to be charged can realize communication even if no electricity or insufficient electricity.

When the potential of the charging power is high enough, in an alternative embodiment, referring to fig. 7, the voltage converting unit 11 is a voltage dropping unit. The voltage reduction unit is used for reducing the potential of the charging power supply to a first potential and a second potential. That is, the first input terminal and the second input terminal of the first switch S1 are respectively connected to the two output terminals of the voltage step-down unit, wherein the potential of one output terminal is the first potential, and the potential of the other output terminal is the second potential.

Of course, as a preferred embodiment, the first potential and the second potential can both satisfy the operating potential required by the device on the device side to be charged during communication. The device at the device end to be charged can realize communication even if no electricity or insufficient electricity.

In order to implement bidirectional communication and receive communication information of a device to be charged, in an optional embodiment, please refer to fig. 8, the charging communication circuit disclosed in this embodiment further includes: the first potential analyzing module 2 is connected to the potential output terminal C1, and specifically, the first potential analyzing module 2 is connected between the potential output terminal C1 and the first controller 3. In this embodiment, the first potential analyzing module 2 is configured to analyze an electrical signal received by the potential output terminal C1 from the device terminal to be charged to obtain a first terminal potential signal set and a second terminal potential signal set. In this embodiment, the terminal potential refers to a ground potential sent by the to-be-charged device terminal and received by the potential output terminal C1. In a specific embodiment, the first terminal potential is not equal to the second terminal potential, so that the first terminal potential and the second terminal potential signal set can represent second communication information.

It should be noted that, when the charging device transmits power or information to the device to be charged, the first controller 3 may control the path state of the first potential analyzing module 2, so that the first potential switching module 1 and the potential output terminal C1 are in a short circuit state, so as to prevent the load of the first potential analyzing module 2 from causing loss to the electric energy output by the first potential switching module 1.

In an embodiment, referring to fig. 9, the first potential analyzing module 2 disclosed in this embodiment includes: the input end of the first comparator 21 is connected with the potential output end C1. The first comparator 21 is configured to compare the electrical signal received at the input end thereof with a reference potential respectively according to a time sequence to obtain a comparison result, where the comparison result is a first terminal potential signal set and a second terminal potential signal set. Specifically, since the first terminal potential is not equal to the second terminal potential, a reference potential is set between the first terminal potential and the second terminal potential, and the first terminal potential and the second terminal potential can output high-level and low-level digital signals after being compared with the reference potential, that is, a signal set representing the second communication information can be converted into a more regular digital signal set, and the digital signal sets can be read by a logic control device or a controller. As an alternative embodiment, the first comparator 21 may be an existing general comparator, preferably a schmitt trigger, to reduce the glitch of the compared output signal.

Generally, the current of the device at the device end to be charged is relatively stable during the charging process, so that the device end to be charged can use the current to represent the communication information. In order to resolve the communication when the electrical signal received by the potential output terminal C1 from the device to be charged is a current signal, referring to fig. 9, the first potential resolution module 2 may further include: the I/V conversion circuit 22 and the I/V conversion circuit 22 are connected to the potential output terminal C1, specifically, the I/V conversion circuit 22 may be connected in parallel to the potential output terminal C1 and the reference potential providing terminal, in this embodiment, the I/V conversion circuit 22 is configured to convert the current signal received by the potential output terminal C1 into a voltage signal, and input the voltage signal to the input terminal of the first comparator.

Referring to fig. 9, in the embodiment, the I/V conversion circuit 22 includes an I/V conversion resistor R1, one end of the I/V conversion resistor R1 is connected to the potential output terminal C1 and the input terminal 211 of the comparator, and the other end of the I/V conversion resistor R1 is connected to the reference terminal 212 of the first comparator.

In a specific embodiment, the first controller 3 is connected to the first potential analyzing module 2, and the first controller 3 obtains the second communication information according to the first terminal potential and the second terminal potential signal set. In this embodiment, after receiving the first terminal potential and the second terminal potential signal set, the first controller 3 may analyze the first terminal potential and the second terminal potential signal set according to a decoding rule adapted to the terminal of the device to be charged to obtain the second communication information.

In an optional embodiment, referring to fig. 10, the charging communication circuit disclosed in this embodiment further includes: and the trigger module 4 is connected with the first controller 3, and the first controller 3 generates a first control signal under the trigger of the trigger module 4. In a specific embodiment, the triggering module 4 may be a touch screen and/or a physical button, and may also be a voice recognition module or an action capture module, and may also be any other existing or future human-computer interaction module capable of implementing triggering control, and of course, in a specific implementation process, the triggering module 4 may be one kind, or may also be a combination of multiple kinds. In an embodiment, one or more first control signal instructions, such as "query electric quantity", "bluetooth pairing", "earphone to ear", may be stored in the first controller 3 in advance, and then, the trigger module 4 extracts a preset first control signal instruction to send a first control signal corresponding to the first control signal instruction; in some scenarios, the first control signal may also be generated at preset time intervals, and specifically, the preset time intervals may be equally or unequally spaced. In another embodiment, the trigger module 4 may generate the first control signal instruction, and then the first controller 3 generates the first control signal corresponding to the first control signal instruction according to the trigger module 4.

It should be noted that when the trigger module 4 has a bidirectional interaction function, such as an output function of displaying, presenting, playing audio, etc., the control signal of the trigger module 4 may also come from the first controller 3.

It should be noted that, in the implementation process, the first controller 3 and the controller in the charging device may be the same or may be independently arranged.

The present embodiment also discloses a charging communication method, which is applicable to a charging device, please refer to fig. 11, which is a flowchart of the charging communication method disclosed in the present embodiment, and the charging communication method includes:

step S111, generating a first control signal according to the first communication information. In a specific embodiment, the first controller 3 generates a first control signal sequence according to the first communication information and transmits the first control signal sequence to the first potential switching module 1. In this embodiment, the first control signal sequence is a binary signal sequence. In a specific implementation process, after the first controller 3 completes generation of a first control signal sequence according to the first communication information, the first control signal sequence is transmitted to the first potential switching module 1 in parallel and in series; the first controller 3 may also generate first control signals one by one according to the first communication information and transmit the first control signals to the first potential switching module 1, that is, generate one control signal for transmission.

In step S112, potentials are sequentially switched in response to the first control signal sequence. In this embodiment, the first potential switching module 1 sequentially switches between the first potential and the second potential in response to the first control signal sequence. Thus, the first control signal sequence is expressed by the first potential and the second potential signal set formed by switching between the first potential and the second potential, that is, the first communication information is characterized.

Step S113, a first potential and a second potential signal set are transmitted. In this embodiment, the first voltage level switching module 1 is connected to the voltage level output terminal C1, so the voltage level output terminal C1 can receive the first voltage level and the second voltage level provided by the first voltage level switching module 1. Therefore, when the potential output terminal C1 is connected to the device terminal to be charged, the first potential and the second potential signal set can be transmitted to the device terminal to be charged. In this embodiment, at least one of the first potential and the second potential is a charging potential to provide power to the device to be charged; and the first potential and the second potential are not equal to transmit information to the device to be charged in the process of supplying power to the device to be charged.

Fig. 12 is a schematic diagram of a potential switching circuit according to the present embodiment, where the potential switching circuit includes: potential switching module 1, wherein:

the potential switching module 1 is configured to switch and output a first potential and a second potential, and in a specific embodiment, the potential switching module 1 may have a controller built therein or may have an external controller. The input end of the potential switching module 1 is used for being connected to an external charging POWER supply POWER +, and adjusting the potential of the external charging POWER supply POWER + into a first potential and a second potential, that is, the output end of the potential switching module 1 can output the first potential and also can output the second potential. In this embodiment, the output terminal of the potential switching module 1 switches and outputs the first potential and the second potential under the control of the first control signal CNT 1. In a specific embodiment, one of the first potential and the second potential may be a potential of an external charging POWER supply + voltage. In this embodiment, at least one of the first potential and the second potential is a charging potential, and in this embodiment, the charging potential refers to a potential capable of charging the device to be charged. At least one of the first potential and the second potential is a charging potential, so that the potential output by the potential switching module 1 can provide power for the device to be charged. In a specific embodiment, the first potential and the second potential are not equal, so that information is transmitted to the device to be charged in the process of supplying power to the device to be charged.

In the present embodiment, the first control signal CNT1 may be from a built-in controller or an external controller. In this embodiment, the first control signal CNT1 is capable of representing the first communication information, that is, the high and low level digital signals formed by encoding the first communication information according to a preset rule, and the set of these digital signals is capable of representing the first communication information. It should be understood by those skilled in the art that the embodiment does not limit the specific content of the first communication information.

In a specific embodiment, the switching module 1 includes: the input end of the voltage conversion unit 11 is connected to an electrode of the external charging POWER supply POWER +, and the voltage conversion unit 11 is used for converting the potential of the external charging POWER supply POWER + into a first potential. Of course, in some embodiments, the voltage converting unit 11 may also convert the potential of the external charging POWER supply POWER + into the first potential and the second potential.

As an alternative embodiment, the voltage converting unit 11 is a voltage boosting unit. The second potential is the potential of the external charging POWER supply POWER +, and the first potential is the potential of the voltage boosting unit 11 after boosting the charging POWER supply. In an embodiment, referring to fig. 12, the first potential and the second potential are potentials after the voltage boosting unit 11 boosts the charging POWER supply, that is, the potential of the voltage boosting unit 11 boosts the potential of the charging POWER supply + into two potentials to obtain the first potential and the second potential; in another embodiment, referring to fig. 13, the second voltage level is the voltage level of the charging POWER supply + voltage.

As an alternative embodiment, the voltage converting unit 11 is a voltage dropping unit. Referring to fig. 12, the voltage dropping unit is used for dropping the voltage of the charging POWER supply + to the first voltage and the second voltage. Of course, the voltage dropping unit can also drop the voltage of the charging POWER supply POWER + to the first voltage (or the second voltage), and the second voltage (or the first voltage) can be multiplexed with other voltages different from the first voltage (or the second voltage).

As a preferred embodiment, the first potential and the second potential can both satisfy the potential required by the device at the device end to be charged during communication, so that communication through the first potential and the second potential can be realized even when the battery of the device at the device end to be charged is insufficient or dead.

As an alternative embodiment, one of the first potential and the second potential is a Ground (GND) terminal potential. It should be noted that, when one of the first potential and the second potential is a Ground (GND) terminal potential, the other should be a charging potential, and in this embodiment, the device terminal to be charged should have an independent power supply or a battery in order to complete the communication operation.

In a specific embodiment, the electric potential switching module 1 switches and outputs the first electric potential and the second electric potential according to the first communication information. Specifically, referring to fig. 15, the potential switching circuit disclosed in the present embodiment further includes: a controller 12, the controller 12 is used for generating a first control signal according to the first communication information; the potential switching module 1 switches and outputs between a first potential and a second potential in response to a first control signal. The controller may be a logic control circuit, or may be a processing unit having data processing capability, such as a single chip, a DSP, or a CPU. In a specific embodiment, the electric potential switching circuit may further include an electronic switch that is switched on between the first electric potential and the second electric potential in response to the first control signal to switch and output the first electric potential and the second electric potential.

It should be noted that the controller 12 may be a built-in control unit, and the controller 12, the voltage conversion unit 11 and the electronic switch are integrated into the potential switching module 1; the controller 12 may also be an external controller, that is, the first control signal is from the external controller, and the controller 12 is packaged separately from the voltage conversion unit 11 and the electronic switch.

In an alternative embodiment, referring to fig. 16, the potential switching circuit may further include: and the trigger module 4 is connected with the controller, and the controller generates a first control signal according to the first communication information under the trigger of the trigger module 4. It should be noted that the triggering module 4, the controller 12, the voltage converting unit 11, and the electronic switch may be integrated into the potential switching module 1; the trigger module 4 may be packaged independently of the controller 12, the voltage conversion unit 11, and the electronic switch.

In a specific embodiment, the triggering module 4 may be a touch screen and/or a physical button, and may also be a voice recognition module or an action capture module, and may also be any other existing or future human-computer interaction module capable of implementing triggering control, and of course, in a specific implementation process, the triggering module 4 may be one kind, or may also be a combination of multiple kinds. In an embodiment, the controller 12 may pre-store one or more first control signal instructions, such as "inquire electric quantity", "bluetooth pairing", "earphone to ear", and the like, and then extract a preset first control signal instruction through the trigger module 4 to send a first control signal corresponding to the first control signal instruction; in some scenarios, the first control signal may also be generated at preset time intervals, and specifically, the preset time intervals may be equally or unequally spaced. In another embodiment, the trigger module 4 may generate the first control signal instruction, and the controller 12 generates the first control signal corresponding to the first control signal instruction according to the trigger module 4.

According to the potential switching circuit for the charging communication circuit disclosed by the embodiment of the invention, the potential switching circuit is used for switching and outputting the first potential and the second potential, on one hand, at least one of the first potential and the second potential is a charging potential, so that the potential output by the potential switching circuit can charge equipment at the end of equipment to be charged; on the other hand, the first potential and the second potential are not equal, so that information can be transmitted to the device to be charged in the process of supplying power to the device to be charged. That is, by switching between the first potential and the second potential by the potential switching circuit, both charging and communication can be carried out during charging. Compared with the prior art, in the charging communication circuit, only the potential switching circuit needs to be added, the structural complexity of a hardware circuit is reduced, and the circuit structure is simple and compact. Compared with the prior art, the structure is simple, the number of added components is small, and the stability and reliability of the circuit structure are improved compared with the prior art.

Referring to fig. 4-8 and fig. 10, the present embodiment further discloses a charging device, which includes any one of the charging communication circuits disclosed above. In this embodiment, the charging device may be a mobile power supply or a charging box. In a particular embodiment, the charging device may further comprise a first battery, detachably or fixedly connected to the electrode of the charging POWER supply POWER +, to provide charging POWER through the electrode of the charging POWER supply. It should be noted that, in some embodiments, the charging device may further include an external POWER interface, configured to receive external charging POWER provided by an external POWER source, where the external charging POWER may be used for the charging device to operate, may also charge the first battery of the charging device, and may also provide charging POWER for the charging POWER supply POWER +. In some embodiments, the charging communication circuit and the other modules share a controller when the other modules in the charging device also have controllers.

Referring to fig. 17, the present embodiment further discloses a charging device, which includes any one of the above-mentioned potential switching circuits. In this embodiment, the charging device may be a mobile power supply or a charging box. In a particular embodiment, the charging device may further comprise a first battery, detachably or fixedly connected to the electrode of the charging POWER supply POWER +, to provide charging POWER through the electrode of the charging POWER supply. It should be noted that, in some embodiments, the charging device may further include an external POWER interface, configured to receive external charging POWER provided by an external POWER source, where the external charging POWER may be used for the charging device to operate, may also charge the first battery of the charging device, and may also provide charging POWER for the charging POWER supply POWER +. In some embodiments, the potential switching circuit and the other module share the controller when the other module also has the controller in the charging apparatus.

Referring to fig. 18, the present embodiment further discloses a charging device, and in a specific embodiment, the charging device may be a mobile power source or a charging box. In this embodiment, the charging apparatus includes: a potential output terminal C1 for connecting to a device to be charged; after the potential output terminal C1 and the ground terminal C2 are connected to the device to be charged, the potential output terminal C1 and the ground terminal C2 form a loop with the device at the device end to be charged, and the potential output terminal C1 can provide power to the device to be charged. The potential output end C1 switches the potential of the potential output end between a first potential and a second potential at least in part of the time period in the process of supplying power to the device to be charged, and at least one of the first potential and the second potential is a charging potential to supply power to the device to be charged; the first potential and the second potential are not equal, so that information is transmitted to the device to be charged in the process of supplying power to the device to be charged.

It should be noted that, in a specific implementation process, the switched first potential and the switched second potential provided by the potential output terminal C1 in the charging device may be implemented by a potential providing module, and in a specific embodiment, the potential providing module may be implemented by the scheme of any one of the above-mentioned charging communication circuit or the potential switching circuit. In this embodiment, the working POWER supply of the potential providing module may be provided by the charging POWER supply +, or may be provided by a battery in the charging device. It should be noted that, in some embodiments, when the charging device includes the analysis module, the electric signal transmitted from the outside (for example, the device to be charged) may also be received through the potential output terminal C1, and then the received external electric signal is analyzed to obtain the received communication information. Specifically, reference may be made to the description of the above embodiments, which are not repeated herein.

In the charging device disclosed in this embodiment, the potential output terminal that provides the power supply is multiplexed, and the potential of the potential output terminal is switched between the first potential and the second potential at least for a part of the time period in the process of providing the power supply to the device to be charged, on one hand, at least one of the first potential and the second potential is a charging potential, so that the device at the device end to be charged can be charged; on the other hand, the first potential and the second potential are not equal, so that information can be transmitted to the device to be charged in the process of supplying power to the device to be charged. Namely, the potential output end for supplying power is multiplexed to switch between the first potential and the second potential, so that power can be supplied and communication can be transmitted in the charging process. Compared with the prior art, under the condition that the signal output end is not increased, a single working mode of serial charging or communication is needed, the scheme of the embodiment can realize parallel power supply and communication in the same time period under the condition that the signal output end is not increased, and compared with the scheme of supplying power and communication by multi-contact, the complexity of a hardware circuit structure is reduced, and the circuit structure is simple and compact. Compared with the prior art, the charging equipment has a simple structure, and is provided with few added components, so that the stability and reliability of the circuit structure are improved compared with the prior art.

Example 3

In order to implement communication during charging, the present embodiment discloses a charging communication circuit, which is suitable for a device to be charged, please refer to fig. 19, which is a schematic structural diagram of the charging communication circuit disclosed in the present embodiment, in which the device to be charged generally includes a potential receiving terminal C3 and a common terminal C4, and the common terminal C4 is used for common ground between the charging device and the device to be charged after the charging communication circuit is connected to the charging device. After the potential receiving terminal C3 and the common terminal C4 are respectively connected to the power terminals of the charging device, the device to be charged and the charging device form a loop, and the device to be charged can receive the power provided by the charging device through the potential receiving terminal C3 and the common terminal C4. The charging communication circuit disclosed in the present embodiment includes: potential receiving terminal C3 and second potential analyzing module 31, wherein:

the potential receiving terminal C3 is used for receiving the power transmitted by the charging device after it is connected with the charging device. In this embodiment, the connection manner between the potential receiving terminal C3 and the power supply terminal of the charging device is not limited, as long as the potential receiving terminal C3 can receive the power supply provided by the charging device after the potential receiving terminal C3 is connected to the power supply terminal of the charging device. The power received by the potential receiving terminal C3 can be input to a power supply electrode (shown by a dashed line in fig. 19) of the device terminal to be charged, so as to supply power to the device terminal to be charged or charge a battery of the device terminal to be charged. Of course, in a specific implementation process, the potential receiving terminal C3 may also be connected to the electrical source terminal of the device to be charged through another component or module (e.g., a charging control module). In this embodiment, the power supply is configured to be at least partially configured as a first potential and a second potential signal set, and at least one of the first potential and the second potential is a charging potential to provide an operating power supply for the device to be charged.

The second potential analyzing module 31 is connected to the potential receiving terminal C3. In this embodiment, the second potential analyzing module 31 is configured to analyze the first potential and the second potential signal set to obtain a digital signal sequence, where the first potential is not equal to the second potential, so as to obtain information transmitted by the charging device. Specifically, since the first potential is not equal to the second potential, the first potential and the second potential signal set may represent communication information, in this embodiment, the second potential analysis module 31 analyzes the first potential and the second potential signal set to obtain a digital signal sequence, and the digital signal sequence may represent information transmitted by the charging device. As an example, the charging device encodes the first communication information (e.g., "inquiry electric quantity," "accessory pairing," "earphone to ear," "charging device terminal electric quantity," etc.) according to a preset encoding rule to form a digital signal sequence, and then represents the digital signal sequence by the first electric potential and the second electric potential signal set, and after the second electric potential analyzing module 31 analyzes the first electric potential and the second electric potential signal set, the digital signal sequence transmitted by the charging device terminal, that is, the first communication information transmitted by the charging device terminal, may be obtained.

The charging communication circuit disclosed in this embodiment multiplexes a potential receiving end of a received power supply, where the received power supply is configured to be a first potential and a second potential signal set at least for a part of a time period, and on one hand, at least one of the first potential and the second potential is a charging potential, so that the charging communication circuit can provide a charging power supply for a device to be charged; on the other hand, the first potential and the second potential are not equal, so that in the process of receiving the power supply provided by the charging device, the second potential analyzing module can analyze the first potential and the second potential signal set to obtain a digital signal sequence, and then, information transmitted by the charging device can be obtained. Namely, the power receiving and communication can be realized through the multiplexing potential receiving end and the second potential analyzing module. Compared with the prior art, under the condition that a signal receiving end is not added, a single working mode of serial charging or communication is needed, the scheme of the embodiment can realize parallel receiving of power supply and communication information in the same time period under the condition that a signal output end is not added, and compared with the scheme of providing power supply and communication by multi-contact, the complexity of a hardware circuit structure is reduced, and the circuit structure is simple and compact. Compared with the prior art, the charging communication circuit is simple in structure and few in added components, so that the stability and the reliability of the circuit structure are improved compared with the prior art.

In an embodiment, referring to fig. 19, the second potential analyzing module 31 includes: the input terminal of the second comparator 311 is connected to the potential receiving terminal C3. In this embodiment, the second comparator 311 compares the first potential signal set and the second potential signal set received by its input terminal with the reference voltage respectively to obtain a digital signal sequence. Specifically, since the first potential and the second potential are not equal, a reference potential is set between the first potential and the second potential, and the first potential and the second potential can output digital signals of high and low levels after being compared with the reference potential, that is, a signal set representing the first communication information can be converted into a more regular digital signal set, and the digital signal sets can be read by the logic control device or the controller. As an alternative embodiment, the second comparator 311 may be an existing general comparator, preferably a schmitt trigger, to reduce the glitch of the compared output signal. In one embodiment, the second comparator 311 compares the first potential or the second potential with the reference voltage to obtain a digital signal.

In an embodiment, referring to fig. 19, the second potential analyzing module 31 includes: a reference voltage circuit 312, the reference voltage circuit 312 is connected to the reference voltage terminal of the second comparator 311, and the reference voltage circuit 312 is used for providing the reference voltage to the second comparator 311.

As a preferred embodiment, the first potential and the second potential can both satisfy an operating potential required by the device at the device end to be charged during communication. The device at the device end to be charged can realize communication even if no electricity or insufficient electricity.

In an embodiment, referring to fig. 19, the charging communication circuit further includes: and the second controller 33, the second controller 33 is connected with the output end of the second potential analysis module 31, and the second controller 33 is configured to obtain information transmitted by the charging device end according to the digital signal sequence. In this embodiment, the second controller 33 may decode the digital signal sequence to obtain the information transmitted by the charging device end through a decoding rule adapted to the encoding rule of the charging device end.

In order to realize the information transmission to the charging device, in an alternative embodiment, please refer to fig. 20, the charging communication circuit further includes: and a second potential switching module 32, wherein the second potential switching module 32 is connected between the potential receiving terminal C3 and the common ground terminal C4, and the second potential switching module 32 is further connected to the second controller 33. In this embodiment, the second controller 33 is further configured to generate a second control signal; the second voltage switching module 32 switches the voltage level of the voltage receiving terminal C3 between the first terminal voltage and the second terminal voltage in response to the second control signal. In this embodiment, the terminal potential refers to a potential of the potential receiving terminal C3, and in a specific embodiment, the first terminal potential and the second terminal potential are not equal to each other, so as to transmit information to the charging device terminal. In a specific embodiment, the second control signal may be provided by a controller of the charging communication circuit, or may be provided by an external controller, or may be provided by an input/output device (I/O device, such as a physical button).

In one embodiment, the second potential switching module 32 includes: a variable resistor (not shown) connected between the potential receiving terminal C3 and the common ground terminal C4; the resistance value of the variable resistor is switched between a first resistance value and a second resistance value according to the received second control signal, and the first resistance value is not equal to the second resistance value. In this embodiment, the first resistance value is not equal to the second resistance value, so that the potential represented at the potential receiving terminal C3 is switched along with the switching of the resistance value of the variable resistor, and then the potential receiving terminal C3 can form a first terminal potential signal set and a second terminal potential signal set based on the second control signal sequence, so as to represent the second communication information.

In another embodiment, the second potential switching module 32 includes: the switch circuit is connected between the potential receiving end C3 and the common ground end C4; the switch circuit switches the on state and the off state between on and off according to the received second control signal. In this embodiment, the switch circuit switches the on/off state according to the received second control signal, so that the potential represented at the potential receiving terminal C3 is represented as a low potential and a high potential along with the switching of the on/off of the switch circuit, and then the potential receiving terminal C3 can form a first terminal potential and a second terminal potential signal set based on the second control signal sequence, so as to represent the second communication information. In particular embodiments, the switching circuit may be implemented by switching devices, such as electronic switches, transistors, and the like.

Referring to fig. 21, the switch circuit disclosed in the present embodiment includes: the resistor R2 and the switch device S2, the switch device S2 and the resistor R2 are sequentially connected in series between the potential receiving end C3 and the common ground end C4; the switching device S2 switches the on/off state according to the second control signal.

In one embodiment, switching device S2 may be, for example, an electronic switch that switches on/off states in response to receiving the second control signal.

In another embodiment, the switching device is a transistor, a first electrode (e.g., a source) and a second electrode (e.g., a drain) of the transistor are connected in series with a resistor between the potential receiving terminal C3 and the common ground terminal C4, and a control electrode (e.g., a gate) of the transistor switches on/off states according to the received second control signal. It should be noted that, in this embodiment, the type of the transistor is not limited, and the transistor may be an NPN transistor or a PNP transistor; the transistor may be a bipolar transistor or a field effect transistor. As long as the transistor can realize the switching function of the on/off state.

In this embodiment, the on/off state is switched by the switching device S2 according to the received second control signal, so that the potential represented on the potential receiving terminal C3 can be represented as a low potential and a high potential along with the switching of the on and off of the switching device S2, and then the potential receiving terminal C3 can form a first terminal potential and a second terminal potential signal set based on the second control signal sequence, so as to represent the second communication information.

Referring to fig. 22, a flowchart of a charging communication method disclosed in this embodiment is shown, where the charging communication method includes:

the potential receiving terminal C3 shunts the power transmitted by the charging device to the second potential analyzing module 31; the power supply is configured to a first potential and a second potential signal set at least one of which is a charging potential for at least a part of a period;

step S211, analyzing the first potential and the second potential signal set to obtain a digital signal sequence. In this embodiment, the second potential analyzing module 31 analyzes the first potential and the second potential signal set to obtain a digital signal sequence, where the first potential is not equal to the second potential. In a specific embodiment, the first potential and the second potential are derived from the potential transmitted from the charging device to the potential receiving terminal C3.

Step S212, the digital signal sequence is transmitted to the second controller. In this embodiment, the second potential analyzing module 31 may transmit the digital signal sequence to the second controller 33 after the second potential analyzing module 31 analyzes the digital signal sequence.

And step S213, obtaining the information transmitted by the charging equipment terminal according to the digital signal sequence. Specifically, the second controller 33 obtains the information transmitted by the charging device according to the digital signal sequence. Specifically, refer to the description of the above embodiments, which are not repeated herein.

As an optional embodiment, the charging communication method disclosed in this embodiment further includes: the second controller 33 generates a second control signal sequence according to the second communication information and transmits the second control signal sequence to the second potential switching module 32, wherein the second control signal sequence is a binary signal sequence; the second potential switching module 32 sequentially switches the state of the path between the potential receiving terminal C3 and the common ground terminal C4 in response to the second control signal sequence; the potential receiving terminal C3 switches between a first terminal potential and a second terminal potential, which are not equal, in response to the on state to transmit information to the charging device terminal. Specifically, the working principle of each device or module to execute the method steps may refer to the description of the hardware circuit in the above embodiments, and is not described herein again.

In the charging communication circuit disclosed in the above embodiment, each device may be packaged independently, or may be partially integrated or fully integrated.

The embodiment also discloses an accessory, and the accessory can be wearable equipment of intelligence such as earphone, children's wrist-watch, bracelet, and if can be audio-visual accessories such as MP3, MP4, if the accessory that possesses data interaction ability such as medical consumer goods of external use again, can also be the intelligent accessory that possesses data processing ability with other 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.

Referring to fig. 23, a schematic structural diagram of an accessory disclosed in the present embodiment is shown, in a specific embodiment, the accessory disclosed in the present embodiment includes the charging communication circuit suitable for the device to be charged disclosed in any of the above embodiments, and the accessory may further include a second battery detachably or fixedly connected to the potential receiving terminal C3 to receive power through the potential receiving terminal C3. 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.

The embodiment also discloses an accessory, which comprises any one of the disclosed charging communication circuits applicable to the equipment to be charged. The accessories can be intelligent wearable equipment such as earphones, child watches, and bracelets, audio-visual accessories such as MP3 and MP4, accessories with data interaction capacity such as externally-used medical consumer goods, and other intelligent accessories with data processing capacity matched with the intelligent terminal. Referring to fig. 24, a schematic diagram of a structure of an accessory disclosed in this embodiment is shown, where the accessory includes: the potential receiving terminal C3 and the common ground terminal C4 are used for connecting to the charging device terminal and forming a loop with the charging device terminal, and specifically, the potential receiving terminal C3 is used for receiving the power transmitted by the charging device after being connected to the charging device. The power source received by the potential receiving terminal C3 is configured to the first potential and the second potential sequence at least for part of the period. At least one of the first potential and the second potential is a charging potential for charging; the first potential and the second potential are not equal, and the first potential and the second potential sequence are analyzed in the process of receiving the power transmitted by the charging equipment so as to obtain information transmitted by the charging equipment. 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.

It should be noted that, in a specific implementation process, the charging communication circuit module may analyze the first potential and the second potential sequence to obtain information transmitted by the charging device. In a specific embodiment, the charging communication circuit module may be implemented by any one of the above-described schemes of the charging communication circuit. In this embodiment, the operating power of the charging communication circuit module may be provided by the power received by the potential receiving terminal C3, or may be provided by a battery in the accessory. Specifically, reference may be made to the description of the above embodiments, which are not repeated herein. The charging communication circuit module may be integrated or may be packaged separately. The charging communication circuit module may share a controller with other modules when the controller is also needed by other modules in the accessory.

The accessory disclosed in this embodiment multiplexes a potential receiving terminal for receiving a power supply, where the received power supply is configured to a first potential and a second potential signal set at least for a part of a time period, and on one hand, at least one of the first potential and the second potential is a charging potential, so that the accessory can provide a charging power supply for a device to be charged; on the other hand, the first potential and the second potential are not equal, so that the first potential and the second potential sequence can be analyzed in the process of receiving the power supply provided by the charging equipment, and then, the information transmitted by the charging equipment terminal can be obtained. That is, by multiplexing the potential receiving terminals, it is possible to realize both the reception of power and the analysis of communication information. Compared with the prior art, under the condition that a signal receiving end is not added, a single working mode of serial charging or communication is needed, and the scheme of the embodiment can realize parallel receiving of power supply and communication information in the same time period under the condition that a signal output end is not added.

Fig. 25 is a schematic diagram of the intelligent terminal disclosed in this embodiment, and the intelligent terminal includes an intelligent terminal local 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 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 charging communication circuit for the device to be charged disclosed in any of the above embodiments, and the charging communication circuit for the charging device 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, including: the potential switching circuit for the device to be charged disclosed in any of the above embodiments, and the charging communication circuit for the charging device disclosed in any of the above embodiments. In a specific embodiment, the potential switching circuit and the charging communication circuit for the charging device side perform information transmission through the potential output terminal C1 and the potential receiving terminal C3.

The present embodiment also discloses a charging communication system, including: the charging device disclosed in any of the above embodiments, and the accessory disclosed in any of the above embodiments.

Referring to fig. 26, when the charging device needs to send the first communication information to the accessory, the first potential switching module switches the potential of the potential output terminal C1 between the first potential and the second potential in response to the first control signal output by the first controller, such as V in fig. 26_C1Shown by the curve; after the accessory receives the first potential or the second potential, the accessory analyzes the first potential and the second potential respectively to obtain a digital signal set used for representing the first communication information.

When the accessory needs to send second communication information to the charging device, the second potential switching module responds to a second control signal output by the second controller to switch the current from the potential receiving terminal C3 to the common ground terminal C4, and the current can be converted into the potential switching of the potential receiving terminal C3 through the resistor, so that the second communication information can be represented.

To facilitate understanding by those skilled in the art, the charging box (charging device) and the wireless headset (accessory) are described as examples, such as: the wireless earphone is respectively connected with the potential output end C1 and the grounding end C2 of the charging box through the potential receiving end C3 to the common grounding end C4, and a charging power supply provided by the charging box can be transmitted to the wireless earphone through the connected terminals to provide electric energy for the wireless earphone. In the charging process, the charging box can transmit first communication information (for example, the electric quantity of the wireless headset is detected) according to a preset coding rule; the wireless earphone receives first communication information (for example, the power of the wireless earphone is detected) through the contacted potential receiving terminal C3; then, the wireless earphone detects the electric quantity of the battery of the wireless earphone according to the instruction of the first communication information (for example, the electric quantity of the wireless earphone), and codes the data representing the electric quantity according to a preset coding rule to transmit second communication information (for example, the electric quantity of the wireless earphone); the charging box receives the second communication information (for example, the power of the wireless headset) through the contacted potential output terminal C1, thereby completing the two-way communication process of inquiring the power. Specific application scenarios may also be, for example: the wireless earphones are controlled to be paired through the charging box, the wireless earphones are opposite to the ears from left to right, and the wireless earphones are subjected to factory detection. Of course, in some scenarios, it may also be a wireless headset to control the charging box to perform some operations.

It should be noted that the above exemplary descriptions are only for facilitating the technical solution understanding of the technicians in this field, and should not be construed as limiting the technical solution of the present embodiment.

Referring to fig. 27, 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.

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 respectively connected with the potential output end C1 and the grounding end C2 of the charging box through the potential receiving end C3 to the common ground end C4, and the charging electric energy provided by the charging box can be transmitted to the wireless earphone through the connected terminals to provide electric energy 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 second communication information according to the instruction and sends the second communication information to the charging box, the charging box inquires the electric quantity of a battery according to the second communication information and then modulates the electric quantity data of the charging box into first communication information to send the first communication information to the wireless earphone, the wireless earphone analyzes the first communication information to obtain the electric quantity data of the charging box and sends the electric quantity data to the mobile terminal, of course, the wireless earphone can also directly forward the first communication information to the mobile terminal, and then the mobile terminal analyzes the electric quantity data of the charging box.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

It will be appreciated by those skilled in the art that the above-described preferred embodiments may be freely combined, superimposed, without conflict.

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

1. A charging communication circuit, comprising:

the potential receiving terminal (C3) is used for receiving the power transmitted by the charging equipment after the potential receiving terminal is connected with the charging equipment; the power supply is configured to be a first potential and a second potential signal set at least in part of time period, the first potential and the second potential are both charging potentials, and the charging potentials refer to potentials capable of providing charging electric energy for a device to be charged so as to provide a working power supply for the device to be charged; the first potential and the second potential are both from a charging equipment end;

a second potential analyzing module (31) connected to the potential receiving terminal (C3); the second potential analyzing module (31) is configured to analyze the first potential and the second potential signal set to obtain a digital signal sequence, where the first potential is not equal to the second potential, so as to obtain information transmitted by the charging device.

2. The charging communication circuit according to claim 1, wherein the second potential resolution module (31) comprises:

a second comparator, the input end of which is connected to the potential receiving end (C3); and the second comparator compares the first potential signal set and the second potential signal set received by the input end of the second comparator with reference voltage respectively to obtain the digital signal sequence.

3. The charging communication circuit according to claim 2, wherein the second potential resolution module (31) further comprises:

and the reference voltage circuit is connected to the reference voltage end of the second comparator and is used for providing a reference voltage for the second comparator.

4. The charging communication circuit according to any one of claims 1 to 3, wherein the first potential and the second potential are both capable of satisfying an operating potential required by the device to be charged during communication.

5. The charging communication circuit according to any one of claims 1 to 3, further comprising:

and the second controller (33) is connected with the output end of the second potential analyzing module (31), and the second controller (33) is used for obtaining the information transmitted by the charging equipment end according to the digital signal sequence.

6. The charging communication circuit of claim 5, further comprising:

a common ground terminal (C4) for the charging device and the device to be charged being common ground after they are connected to the charging device.

7. The charging communication circuit of claim 6, further comprising:

a second potential switching module (32) connected between the potential receiving terminal (C3) and the common ground terminal (C4); the second potential switching module (32) is also connected to the second controller (33);

the second controller (33) is further configured to generate a second control signal; the second electric potential switching module (32) responds to the second control signal to switch the electric potential of the electric potential receiving end (C3) between a first machine end electric potential and a second machine end electric potential, wherein the first machine end electric potential is not equal to the second machine end electric potential, so as to transmit information to the charging equipment end.

8. The charging communication circuit according to claim 7, wherein the second potential switching module (32) comprises:

a variable resistor connected between the potential receiving terminal (C3) and the common ground terminal (C4); and the resistance value of the variable resistor is switched between a first resistance value and a second resistance value according to a received second control signal, and the first resistance value is not equal to the second resistance value.

9. The charging communication circuit according to claim 7, wherein the second potential switching module (32) comprises:

a switch circuit connected between the potential receiving terminal (C3) and the common ground terminal (C4); the switching circuit switches the on state and the off state between on and off according to the received second control signal.

10. The charging communication circuit of claim 9, wherein the switching circuit comprises:

a resistance;

a switch device connected in series with the resistor in sequence between the potential receiving terminal (C3) and the common ground terminal (C4); the switching device switches an on/off state according to the second control signal.

11. The charging communication circuit of claim 10, wherein the switching device is an electronic switch that switches on/off states in accordance with the second control signal.

12. The charging communication circuit of claim 10, wherein the switching device is a transistor, a first pole and a second pole of the transistor are connected in series with the resistor between the potential receiving terminal (C3) and the common ground terminal (C4), and a control pole of the transistor switches on/off states according to a received second control signal.

13. A charging communication circuit, comprising: a second comparator (311), a reference voltage circuit (312), and a second controller (33), wherein:

the input end of the second comparator (311) is used for being connected to a potential receiving end (C3) of a device to be charged, the reference end of the second comparator (311) is connected to the reference voltage circuit (312), and the output end of the second comparator (311) is connected to the second controller (33);

the reference voltage circuit (312) is used for providing a reference voltage to the reference terminal of the second comparator (311);

the input end of the second comparator (311) is used for inputting a first potential and a second potential signal set received by the potential receiving end (C3), and both the first potential and the second potential can meet the working potential required by the device at the device end to be charged in the communication process; the second comparator (311) compares the first potential signal set and the second potential signal set received by the input end thereof with the reference voltage respectively to output a digital signal sequence; the first potential and the second potential are both from a charging equipment end;

and the second controller (33) is used for obtaining the information transmitted by the charging equipment terminal according to the digital signal sequence.

14. A charging communication method, comprising:

the potential receiving end (C3) shunts the power transmitted by the charging equipment to the second potential analyzing module (31); the power supply is configured to a first potential and a second potential signal set at least in part, the first potential and the second potential are both charging potentials, and the charging potentials are potentials capable of providing charging electric energy for a device to be charged; the first potential and the second potential are both from a charging equipment end;

the second potential analyzing module (31) analyzes the first potential and the second potential signal set to obtain a digital signal sequence; the first potential is not equal to the second potential;

the second potential analyzing module (31) transmits the digital signal sequence to a second controller (33);

and the second controller (33) obtains the information transmitted by the charging equipment terminal according to the digital signal sequence.

15. The charging communication method according to claim 14, further comprising:

the second controller (33) generates a second control signal sequence according to the second communication information and transmits the second control signal sequence to the second electric potential switching module (32), and the second control signal sequence is a binary signal sequence;

the second potential switching module (32) sequentially switches the state of a path between the potential receiving terminal (C3) and a common ground terminal (C4) in response to the second control signal sequence;

the potential receiving terminal (C3) switches between a first terminal potential and a second terminal potential in response to the path state, the first terminal potential and the second terminal potential being unequal to transmit information to the charging device terminal.

16. A charging communication system, comprising: voltage boost unit (11), electronic switch (S1), first controller (3), electric potential output terminal (C1), electric potential receiving terminal (C3), second comparator (311), reference voltage circuit (312) and second controller (33), wherein:

the potential output end (C1) is detachably connected with a potential receiving end (C3);

the input end of the voltage boosting unit (11) is used for being connected to a charging POWER supply (POWER +); the voltage boosting unit (11) is used for boosting the potential of the charging power supply to a first potential; a first input terminal of the electronic switch (S1) is connected to the output terminal of the voltage boosting unit (11), a second input terminal of the electronic switch (S1) is used for being connected to a charging POWER supply (POWER +), and an output terminal of the electronic switch (S1) is connected to the potential output terminal (C1);

the first controller (3) is used for generating a first control signal, and the first control signal is used for representing first communication information; the electronic switch (S1) responds to a received first control signal to switch and conduct to a first input end or a second input end so as to switch and output a first potential and a second potential, wherein the second potential is the potential of a charging POWER supply (POWER +), the first potential and the second potential meet the potential required by the operation of a device end to be charged, and the first potential and the second potential are not equal; the first potential and the second potential are both charging potentials, and the charging potentials are potentials capable of providing charging electric energy for the equipment to be charged; the first potential and the second potential are both from a charging equipment end;

the input end of the second comparator (311) is used for being connected to the potential receiving end (C3), the reference end of the second comparator (311) is connected to the reference voltage circuit (312), and the output end of the second comparator (311) is connected to the second controller (33);

the input end of the second comparator (311) is used for inputting the first potential and the second potential signal set received by the potential receiving end (C3); the second comparator (311) compares the first potential signal set and the second potential signal set received by the input end thereof with the reference voltage respectively to output a digital signal sequence; the second controller (33) is configured to derive the first communication information from the sequence of digital signals.

17. A fitting, comprising:

the charging communication circuit according to any one of claims 1 to 12; or a charging communication circuit as claimed in claim 13.

18. The accessory of claim 17, wherein the accessory is a wireless headset.

19. A fitting, comprising: the potential receiving end (C3) is used for receiving the power transmitted by the charging equipment after being connected to the charging equipment; the power supply is configured for at least a partial period of time to a first potential and a second sequence of potentials; the first potential and the second potential are both charging potentials, and the charging potentials are potentials capable of providing charging electric energy for the equipment to be charged so as to charge; the first potential and the second potential are not equal, and the first potential and the second potential sequence are analyzed in the process of receiving the power transmitted by the charging equipment so as to obtain information transmitted by the charging equipment; the first potential and the second potential are both from a charging device end.

20. An intelligent terminal, comprising:

the intelligent terminal is local;

the accessory of claim 17 or 18, or the accessory of claim 19, for data interaction locally with the smart terminal.

21. A charging communication system, comprising:

the charging communication circuit according to any one of claims 1 to 12; or the charging communication circuit of claim 13; and the number of the first and second groups,

a charging communication circuit of a charging device side, the charging communication circuit of the charging device side including a potential output terminal (C1); the potential output end (C1) and the potential receiving end (C3) are detachably connected for information transmission.

22. The charging communication system according to claim 21, wherein the charging communication circuit on the charging device side further includes:

a first potential analyzing module (2) connected to the potential output terminal (C1); the first potential analyzing module is used for analyzing an electric signal received by the potential output end (C1) from the equipment end to be charged to obtain a first machine end potential and a second machine end potential signal set, and the first machine end potential is not equal to the second machine end potential.

23. A charging communication system, comprising:

the fitting of claim 17 or 18, or the fitting of claim 19; and the number of the first and second groups,

and the accessory is detachably connected with the charging equipment so as to transmit information.

24. A charging communication system, comprising:

a charging device;

the intelligent terminal of claim 20; 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.