CN111697652B - Charging box, wireless earphone and charging method of wireless earphone - Google Patents
Charging box, wireless earphone and charging method of wireless earphone Download PDFInfo
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- CN111697652B CN111697652B CN202010552199.4A CN202010552199A CN111697652B CN 111697652 B CN111697652 B CN 111697652B CN 202010552199 A CN202010552199 A CN 202010552199A CN 111697652 B CN111697652 B CN 111697652B
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- charging
- wireless earphone
- charging box
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00045—Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/0071—Regulation of charging or discharging current or voltage with a programmable schedule
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
- H04R1/1025—Accumulators or arrangements for charging
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a charging box, a wireless earphone and a charging method of the wireless earphone, wherein the charging box comprises the following components: a power supply assembly; a CC terminal and a power terminal; the first input end of the power switch is connected with the power supply assembly, and the first output end of the power switch is connected with the power supply end; the peripheral identification circuit is connected with the CC end; the peripheral identification circuit is configured to identify the identity type of the external equipment according to the identity information of the external equipment and output a corresponding peripheral identification signal; the charging box controller is connected with the peripheral identification circuit; and the charging box controller is configured to configure corresponding charging current/charging voltage when the external equipment is confirmed to be the wireless earphone according to the external equipment identification signal, and control the power switch to be communicated with the loop of the power supply assembly and the power end so as to charge the wireless earphone. The invention improves the charging efficiency of the wireless earphone.
Description
Technical Field
The invention relates to the technical field of wireless earphones, in particular to a charging box, a wireless earphone and a charging method of the wireless earphone.
Background
With rapid development of earphone technology, wireless earphone, especially bluetooth earphone, is increasingly widely used, and the wireless earphone is usually charged through a charging box, that is, an earphone box. Currently, wireless earphone charging is usually a method using pogo pin contact, and a charging box simulates the effect of a charging box, so that the charging efficiency is limited by charging current, charging voltage and no interaction of charging protocols. And the existing charging box is used for charging the wireless earphone in the conventional sequence of trickle charge, constant current charge and constant voltage charge, and has the advantages of small charging current, constant charging voltage and low charging efficiency.
Disclosure of Invention
The invention mainly aims to provide a charging box, a wireless earphone and a charging method of the wireless earphone, and aims to improve the charging efficiency of the wireless earphone.
To achieve the above object, the present invention proposes a charging cartridge comprising:
a power supply assembly;
a CC terminal and a power terminal;
the first input end of the power switch is connected with the power supply assembly, and the first output end of the power switch is connected with the power supply end;
the peripheral identification circuit is connected with the CC end; the peripheral identification circuit is configured to identify the identity type of the external equipment according to the identity information of the external equipment and output a corresponding peripheral identification signal;
the charging box controller is connected with the peripheral identification circuit; and the charging box controller is configured to configure corresponding charging current/charging voltage when the external equipment is confirmed to be the wireless earphone according to the peripheral identification signal, and control the power switch to be communicated with the power supply assembly and the loop of the power supply end so as to charge the wireless earphone.
Optionally, the charging box controller is specifically configured to provide multiple charging currents/charging voltages for the wireless earphone through the CC terminal, so that the wireless earphone selects and feeds back corresponding charging currents/charging voltages, and according to the fed back charging currents/charging voltages, the charging box controller outputs matched charging currents/charging voltages to charge the wireless earphone.
Optionally, the charging box further comprises a boost circuit, wherein the input end of the boost circuit is connected with the power supply assembly, and the output end of the boost circuit is connected with the power switch;
the charging box controller is further configured to control the boost circuit to work to match the charging current/charging voltage of the wireless earphone when the charging current/charging voltage of the wireless earphone is greater than the output current/voltage of the charging box.
Optionally, the charging box controller is specifically configured to obtain, through the CC end, multiple charging currents/charging voltages provided by the charging device when the identity type of the external device is identified as the charging device according to the peripheral identification signal, and select an adapted charging current/charging voltage to perform charging of the charging box.
Optionally, the charging box further includes:
a charging assembly;
the second input end of the power switch is connected with the power end, and the second output end of the power switch is connected with the charging.
Optionally, the charging box controller is specifically configured to control the power switch to communicate the charging assembly with the loop of the power supply terminal so as to access the electric energy output by the charging device when the identity type of the external device is identified as the charging device according to the peripheral identification signal.
Optionally, the peripheral identification circuit comprises a change-over switch, a pull-up resistor, a pull-down resistor and a peripheral identification unit, wherein the public end of the change-over switch is connected with the CC end, the first connecting end of the change-over switch is connected with one end of the pull-up resistor, and the second connecting end of the change-over switch is connected with one end of the pull-down resistor; the other end of the pull-up resistor is connected with a first direct current power supply; the other end of the pull-down resistor is grounded; the detection end of the peripheral identification unit is connected with the public end.
Optionally, the charging box further comprises a magnetic USB port, the magnetic USB port comprises a power port and a CC port,
the power supply port of the magnetic USB port is used for connecting the power supply end with the power supply end of the earphone;
and the CC port of the magnetic USB port is used for connecting the CC end with the CC end of the earphone.
The invention also proposes a wireless headset comprising:
a charging assembly;
a CC terminal and a power terminal;
the peripheral matching circuit is connected with the CC end; the peripheral matching circuit is configured to output corresponding identity information through the CC end when the wireless earphone is placed into the charging box so as to realize handshake connection between the wireless earphone and the charging box;
The earphone controller is connected with the peripheral matching circuit; the charging box controller is configured to receive the charging box to provide various charging currents/charging voltages after the wireless earphone and the charging box are successfully connected in a handshaking manner, and feed back the charging currents/charging voltages matched with the wireless earphone to the charging box so that the charging box provides the matched charging currents/charging voltages.
The invention also provides a charging method of the wireless earphone, which is suitable for the charging box, and comprises the following steps:
after the charging box establishes connection with external equipment, identifying the identity type of the external equipment;
when the identity type of the external equipment is identified as a wireless earphone, providing various charging currents/charging voltages for the wireless earphone so as to enable the wireless earphone to select and feed back;
determining the charging current/charging voltage matched with the wireless earphone according to the charging current/charging voltage returned by the wireless earphone;
and outputting the matched charging current/charging voltage to charge the wireless earphone according to the charging current/charging voltage matched with the wireless earphone.
The charging box is provided with the power supply assembly, the CC end and the power supply end are arranged and connected with the wireless earphone, and the charging box is also provided with the peripheral identification circuit which is connected with the wireless earphone through the CC end; the peripheral identification circuit can identify the identity type of the external equipment according to the identity information of the external equipment when the wireless earphone is placed in the charging box, and output a corresponding peripheral identification signal to the charging box controller when the identity type of the external equipment is identified as the wireless earphone according to the peripheral identification signal, so as to configure corresponding charging current/charging voltage according to the peripheral identification signal, and control the power switch to be communicated with the power supply assembly and the loop of the power supply end, so as to charge the wireless earphone. The invention improves the charging efficiency of the wireless earphone.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a functional module of an embodiment of a charging box according to the present invention;
fig. 2 is a schematic circuit diagram of an embodiment of a charging box and a wireless headset according to the present invention;
fig. 3 is a flowchart illustrating an embodiment of a charging method of a wireless headset according to the present invention.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 110 | Power supply assembly | 210 | Energy storage assembly |
| 120 | Power switch | 220 | Peripheral matching circuit |
| 130 | Peripheral identification circuit | 230 | Earphone controller |
| 140 | Charging box controller | K1 | Change-over switch |
| 150 | Charging assembly | 131 | Peripheral identification unit |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The term "and/or" is herein merely an association relationship describing an associated object, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
The invention provides a charging box.
With the rapid development of earphone technology, wireless earphones, particularly bluetooth earphones, are increasingly widely applied, and the newly-appearing TWS (time of day) (True Wireless Stereo ) earphone is a product which is more typical in wireless earphones and has a good combination of intelligentization and wireless trend, the wireless earphones have a certain occupancy rate in the earphone market by virtue of wearing free sense and good sound quality, the wireless earphones are also increasingly frequently used in various occasions, and the single use time is also increasingly longer. In the actual use process, people often establish a communication link between the wireless earphone and the intelligent electronic device, such as a mobile phone, a smart watch and the like, play voice by using the wireless earphone, such as talking or playing a music lamp, collect voice of a user, and output the voice to the intelligent electronic device through a wireless communication module configured in the wireless earphone. The wireless earphone is small and convenient, but has stronger storage battery capacity than the traditional neck hanging type and head Bluetooth earphone, and Bluetooth transmission between two ears is avoided not becoming a power consumption point. Wireless headsets are often internally self-powered, such as batteries, but are typically limited in their self-powered capacity, and therefore typically require a headset charging device to charge the wireless headset. The earphone charging device is mostly arranged in a charging box shape, and the wireless earphone can be stored in the charging box when not in use so as not to be lost. The charging box can communicate with the earphone, so that the functions of forced pairing, box opening and closing, OTA upgrading and the like of the wireless earphone are realized. The wireless earphone is different from the traditional wired earphone, and the wireless earphone is usually required to be matched with a charging box for charging, and due to the characteristics of small volume, light wearing and the like of the wireless earphone, the battery capacity of the wireless earphone is determined to be smaller. Currently, wireless earphone charging is usually a method using pogo pin contact, and a charging box simulates the effect of a charging box, so that the charging efficiency is limited by charging current, charging voltage and no interaction of charging protocols. In addition, the charging process of the existing charging box for the wireless earphone follows the charging process of traditional trickle charging- > constant-current charging- > constant-voltage charging, and has the advantages of small charging current, constant charging voltage and low charging efficiency.
Referring to fig. 1 and 2, in an embodiment of the present invention, the charging cartridge includes:
a power supply assembly 110;
CC (configuration channel ) terminals (CC 1, CC 2) and a power source terminal VBUS;
a power switch 120, wherein a first input end of the power switch 120 is connected with the power supply assembly 110, and a first output end of the power switch 120 is connected with the power supply end VBUS; the peripheral identification circuit 130 is connected with the CC end;
the peripheral identification circuit 130 is connected with the CC end; the peripheral identification circuit 130 is configured to identify the identity type of the external device according to the identity information of the external device, and output a corresponding peripheral identification signal;
a charging box controller 140 connected to the peripheral identification circuit 130; the charging box controller 140 is configured to configure a corresponding charging current/charging voltage when the external device is confirmed to be a wireless headset according to the peripheral identification signal, and control the power switch 120 to communicate the power supply assembly 110 with the loop of the power supply terminal VBUS, so as to charge the wireless headset.
In an embodiment, the charging box further includes a housing, where the housing is used to accommodate the power supply assembly 110 and the electric control board, and the housing may be circular or square, and the specific structure of the charging box may be set according to the size of the wireless earphone, the size of the electric control board, and the like, which is not limited herein. The shell is made of light and insulating materials. In this embodiment, a groove may be disposed in the housing, where a corresponding metal interface or a metal probe, that is, an electrical connector, is configured in the groove, where the electrical connector is adapted to a charging interface of the wireless earphone, and when the wireless earphone is placed in the groove of the charging box, the electrical connector of the wireless earphone contacts with the electrical connector, and both the elastic sheet and the metal interface are conductive materials. At this time, the wireless earphone is electrically connected to the charging box. Because the wireless earphone is generally used for the human ear, the wireless earphone can comprise a pair of symmetrical shells, and two electric connectors can be correspondingly arranged in the charging box. The charging box can also be used for accommodating the earphone when the wireless earphone is in a non-charging state. In some embodiments, the electrical connector may further be provided with a magnetic conductive member to ensure that the electrical connector can be securely connected to the electrical connector of the wireless headset when the headset is placed on the electrical connector of the charging box, thereby preventing the electrical connector from damaging the wireless headset or the charging box due to poor contact with the charging interface of the headset. In this embodiment, the electrical connector of the charging box connected to the earphone may be implemented by a magnetic USB (Type-C) port, where the magnetic USB port includes a power supply end VBUS port and a CC port, and the power supply end VBUS port of the magnetic USB port is used for connecting the power supply end VBUS with the power supply end VBUS of the earphone; and the CC port of the magnetic USB port is used for connecting the CC end with the CC end of the earphone. That is, the contact mode of the charging box and the wireless earphone is magnetic Type USB (Type-C), the magnetic Type USB contact is equivalent to the insertion of Type-C wires, and the USB pins can realize the communication between the wireless earphone and the charging box by setting up CC wires through the D+ and D-pull-up resistor interactive charging mode in the charging process, so that the information interaction of charging current and charging voltage is completed. The charging interface for charging the charger is also arranged on the shell of the charging box, and the charging interface can be a USB interface or a Type-C interface, however, in other embodiments, the charging interface can be realized by adopting other charging interfaces, and the charging interface is not limited herein.
The power supply assembly 110 may include a power management circuit and a battery, and the battery may be a single battery or a battery pack formed by connecting a plurality of batteries in series or in parallel. The power management circuit converts the electric energy stored by the battery into electric energy and outputs the electric energy, and the power management circuit can be realized by adopting a power conversion chip. The range of the battery for storing electric energy can be set according to the capacity of the charging box, for example, 3.5-4.3V, and the battery can be realized by adopting rechargeable batteries such as dry batteries, lithium ion storage batteries or nickel hydrogen batteries. The power management circuit is based on the control of the charging box controller 140 to enable charging of the wireless headset. The output current/voltage of the power management circuit can be adjusted, specifically, according to the control signal output by the charging box controller 140, so as to provide the corresponding output current/voltage for the wireless earphone.
It should be noted that, the charging interface of the wireless earphone and the charger of the charging box are both interfaces capable of realizing rapid charging of USB-PD (Power Delivery), and in the charging box controller 140, a PD charging protocol is stored, and after the wireless earphone is put into the charging box for communication, the rapid charging of USB-PD is realized by adjusting the output voltage and current of the charger.
In the charger of earphone and charging box, be provided with the pull-up resistance and the pull-down resistance that are used for carrying out identification. Specifically, a pull-down resistor can be arranged in the earphone, and a pull-up resistor is arranged in the charger of the charging box, wherein the pull-up resistor and the pull-down resistor can also represent that the charger of the charging box and the wireless earphone support USB-PD, namely, the pull-up resistor and the pull-down resistor are identity types of external equipment. In practical application, the pull-up resistor and the pull-down resistor are disposed on the CC terminal, and in a further embodiment, the identification can be performed by detecting the voltage of the VBUS of the power supply terminal. When the earphone or the charger of the charging box is connected to the charging box, the peripheral identification circuit 130 can realize identification by detecting whether the CC terminal is externally connected with the pull-down resistor or the pull-up resistor Rp. It can be understood that, corresponding to the two CC ends (CC 1 and CC 2), the number of the peripheral identification circuits 130 is also two, and when an external device is connected to the CC1 or the CC2, the identification can be performed through a current loop formed by the pull-up resistor or the pull-down resistor of the external device and the CC end. When the wireless earphone is connected to the charging box, the voltage value of the pull-up resistor Rp1 can be controlled by adjusting the size of the pull-up resistor Rp1, and the wireless earphone can know how much current can be pulled up from the vbus by detecting the size of the pull-up resistor Rp 1.
When the earphone is put into the charging box, the pull-down resistor in the earphone is connected with the CC end of the electric box through the CC end of the earphone charging interface, the peripheral identification circuit 130 can realize the identification of the wireless earphone according to the identified pull-down resistor, and the peripheral identification circuit 130 outputs a corresponding peripheral identification signal when the identity type of the external equipment is identified as the wireless earphone according to the peripheral identification signal.
The charging cartridge controller 140 may be implemented using a dedicated charging cartridge control chip within the charging cartridge or may be implemented using a separate microprocessor, without limitation. The charging box controller 140 may be a microprocessor such as a single chip microcomputer, a DSP, an FPGA, etc., and those skilled in the art can use various interfaces and lines to connect various parts of the entire wireless headset by integrating some hardware circuits and software programs or algorithms in the charging box controller 140, and perform various functions and process data of the charging box by running or executing software programs and/or modules in the charging box controller 140 and invoking data in the charging box controller 140, thereby performing overall monitoring on the charging box controller 140. When the charging box controller 140 recognizes that the external device is a wireless earphone, it opens the VCONN, sends all the voltage and current list pairs supported by the charging box to the wireless earphone through the CC terminal, so that the wireless earphone selects one voltage and current pair matched with itself from the voltage and current list (the required current/voltage is different according to the model, the electric quantity, the cruising ability, the service time, the battery loss, the charging time and the like of the wireless earphone), and adds the voltage and current pair to the payload of the Request message, and feeds back to the charging box controller 140 through the CC terminal. The charging box controller 140 controls the power switch 120 to communicate the power supply assembly 110 with the circuit of the power supply terminal VBUS according to the voltage and current of the wireless earphone, so as to communicate with the dc bus, so as to charge the wireless earphone.
In the charging process, the charging box and the wireless earphone feed back information such as voltage and current through the CC end, the charging box controller 140 controls the power supply assembly 110 to work according to the fed back information of the voltage and the current, the output voltage and the current of the charging box can be adjusted in real time, an Accept message is sent to the wireless earphone, and the wireless earphone can adjust the charging voltage and the current of the charging circuit after receiving the Accept message; the wireless earphone can also dynamically send a Request message to Request the charging box to change the output voltage and current in the charging process, so that the rapid charging process is realized.
The charger of the charging box may be a mobile phone or a smart phone with a usb type-C interface, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer), a multimedia player, a digital camera, a personal digital assistant (personal digital assistant, PDA), a navigation Device, a mobile internet Device (Mobile Internet Device, MID), a Wearable Device (wireless Device), a mobile power supply, a power adapter, a mobile hard disk, a usb disk, a data line, and the like.
The invention is provided with the power supply assembly 110 in the charging box and is connected with the wireless earphone through the CC end and the power supply end VBUS, and is also provided with the peripheral identification circuit 130, and the peripheral identification circuit 130 is connected with the wireless earphone through the CC end; the peripheral identification circuit 130 may identify the identity type of the external device according to the identity information of the external device when the wireless earphone is placed in the charging box, and output a corresponding peripheral identification signal to the charging box controller 140 when the identity type of the external device is identified as the wireless earphone according to the peripheral identification signal, so as to configure a corresponding charging current/charging voltage according to the peripheral identification signal, and control the power switch 120 to communicate the power supply assembly 110 with the loop of the power supply terminal VBUS, so as to charge the wireless earphone. The invention improves the charging efficiency of the wireless earphone.
Referring to fig. 1 and 2, in an embodiment, the charging box controller 140 is specifically configured to provide, through the CC terminal, a plurality of charging currents/charging voltages to the wireless headset, so that the wireless headset selects and feeds back the corresponding charging currents/charging voltages, and output, according to the fed back charging currents/charging voltages, the matched charging currents/charging voltages to charge the wireless headset.
In this embodiment, when the wireless earphone is connected, the charging box and the wireless earphone achieve role handshake, and when it is determined that the external device is connected to the pull-down resistor Rd2, the charging box controller 140 uses the charging box as a source terminal to broadcast the charging capability provided by the charging box on the CC line, and sends source_cap data to the wireless earphone to provide charging current/voltage for the wireless earphone, for example, the charging box can provide 5V 3A,9V 2A,12V2.25A charging capabilities. The wireless earphone replies good CRC data to the charging box to indicate the data broadcast by the charging box, the format is correct, and after the CRC check is successful, request type data is sent to the charging box controller 140 to indicate that the wireless earphone requests the charging box to output the corresponding current/voltage output specification according to the three capabilities provided by the charging box. And the charging box synchronizes the GoodCRC data of the wireless earphone, the charging box sends the data requested by the wireless earphone to indicate that the CRC check of the data format is correct, and the charging box receives the request of the earphone by sending Accept type data, so that the current/voltage output specification corresponding to the request can be provided. Subsequently, the charging cartridge sends py_rdy data to the wireless headset indicating that the charging cartridge is ready, the corresponding current/voltage will be output.
Referring to fig. 1 and 2, in an embodiment, the charging box further includes a boost circuit (not shown), an input end of the boost circuit is connected to the power supply assembly 110, and an output end of the boost circuit is connected to the power switch 120;
the charging box controller 140 is further configured to control the boost circuit to work to match the charging current/voltage of the wireless earphone when the charging current/voltage of the wireless earphone is greater than the output current/voltage of the charging box.
It should be noted that, according to the model, the electric quantity, the cruising ability, the service time, the battery loss, the charging time, etc. of the wireless earphone, the required current/voltage may also be different, and the voltage output by the power supply component 110 of the charging box may not directly meet the charging requirement of the wireless earphone. In order to solve the above problems, a boost circuit is further provided between the power switch 120 and the power supply module 110, and the boost circuit boosts the voltage output from the power supply module 110 as needed based on the control of the charging box controller 140 and outputs the boosted voltage. In this way, different charging currents and charging voltages may be defined after providing PD charging protocol interactions. The boost circuit may be a boost circuit, or may be other topologies capable of implementing boost.
Referring to fig. 1 and 2, in some embodiments, the charging box may further be provided with a voltage detection circuit for detecting the amount of power on the power source terminal VBUS, and outputting a voltage detection signal to the charging box controller 140. The voltage detection circuit may specifically use discrete elements such as a resistor and a capacitor to form a serial voltage division circuit to detect the electric quantity of the power supply assembly 110 and the charging assembly 150, or may use an integrated IC such as a voltage detection chip to detect the electric quantity, which is not limited herein.
Referring to fig. 1 and 2, in one embodiment the charging cartridge further comprises:
a charging assembly 150;
a second input terminal of the power switch 120 is connected to the power terminal VBUS, and a second output terminal of the power switch 120 is connected to the charging.
In this embodiment, the charging assembly 150 may include a power management circuit and a battery, and the battery may be a single battery or a battery pack formed by connecting a plurality of batteries in series or in parallel. The power management circuit converts the electric energy stored by the battery into electric energy and outputs the electric energy, and the power management circuit can be realized by adopting a power conversion chip. The range of the battery for storing electric energy can be set according to the capacity of the charging box, for example, 3.5-4.3V, and the battery can be realized by adopting rechargeable batteries such as dry batteries, lithium ion storage batteries or nickel hydrogen batteries. The power management circuit is based on the control of the charging box controller 140 to enable charging of the wireless headset. The output current/voltage of the power management circuit can be adjusted, specifically, according to the control signal output by the charging box controller 140, so as to adjust the charging speed of the charging box by adjusting the charging current/voltage. The battery of the charging assembly 150 and the battery of the power supply assembly 110 are the same battery, the power management circuit may be a charging control chip, and the charging control chip is configured to convert the dc power accessed by the power supply terminal VBUS into the stored power of the charging assembly 150 for energy storage. In some embodiments, the charging control chip may further convert the accessed dc power into charging power of the wireless headset to charge the wireless headset. That is, the charging control chip can be used for charging the charging box itself, and also can be used for providing charging power for the wireless earphone.
In some embodiments, the charging box further includes an electric control board, on which the charging assembly 150, the power supply assembly 110, the power switch 120, the peripheral identification circuit 130, the charging box controller 140, and the like are disposed, and the housing between the electric control board and the battery is electrically connected through a flexible circuit board, a wire, and the like.
Referring to fig. 1 and fig. 2, in an embodiment, the charging box controller 140 is specifically configured to obtain, through the CC terminal, a plurality of charging currents/charging voltages provided by the charging device when the identity type of the external device is identified as the charging device according to the peripheral identification signal, and select an adapted charging current/charging voltage to perform charging box charging.
In this embodiment, the charging device is a charger of the charging box, when the charging box itself charges, the charging box and the charger implement role handshake, and when it is determined that the external device is connected to the pull-up resistor Rp, the charging box controller 140 uses the charging box as a sink end, and the charger broadcasts the charging capability that the charger can provide on the CC line, and sends source_cap data to the charging box to provide charging current/voltage for the charging box, for example, the charger can provide 5V 3A,9V 2A,12V 2.25A charging capabilities. The charging box replies good CRC data to the charging box to indicate the data broadcast by the charging box, the format is correct, and after the CRC check is successful, request type data is sent to the charging box to indicate that the charging box is required to output current/voltage output specifications corresponding to the charging box according to three capacities provided by the charger. The charger synchronizes the GoodCRC data of the charging box, the charger sends the data of the request to the charging box to indicate that the data format is correct, the CRC check is successful, and the data of the Accept type is sent to indicate that the charger receives the request of the charging box, so that the current/voltage output specification corresponding to the request can be provided. Subsequently, the charger sends py_rdy data to the charging cartridge indicating that the charger is ready, the corresponding current/voltage will be output.
Referring to fig. 1 and fig. 2, in an embodiment, the charging box controller 140 is specifically configured to control the power switch 120 to connect the charging assembly 150 and the circuit of the power source VBUS to access the electric energy output by the charging device when the identity type of the external device is identified as the charging device according to the peripheral identification signal.
It can be appreciated that in this embodiment, the charging box may perform quick charging through the USB-PD charger, or perform quick charging to the wireless earphone, that is, in the charging process of the charging box and the earphone, the charging box is used as a source end, and when the charger charges itself, the charging box controller 140 controls the power switch 120 to communicate with the corresponding charging circuit according to different external devices.
Referring to fig. 1 and 2, in an embodiment, the peripheral identification circuit 130 includes a switch K1, a pull-up resistor Rp1, a pull-down resistor Rd1, and a peripheral identification unit 31, where a common terminal of the switch K1 is connected to the CC terminal, a first connection terminal of the switch K1 is connected to one terminal of the pull-up resistor Rp1, and a second connection terminal of the switch K1 is connected to one terminal of the pull-down resistor Rd 1; the other end of the pull-up resistor Rp1 is connected with a first direct current power supply VDD; the other end of the pull-down resistor Rd1 is grounded, and the detection end of the peripheral identification unit 31 is connected with the common end.
In this embodiment, when the charging box works, the switch K1 switches between the two connection ends at the common end, and when the external device is a wireless earphone, the common end is connected with the first connection, that is, a current loop is formed between the common end and the first dc power supply VDD, the pull-up resistor Rp1, the first connection end, and the pull-down resistor Rd2 of the external device. When the external device is a charger, the common terminal is connected to the second connection terminal, that is, a current loop is formed between the common terminal and the first connection terminal, the pull-down resistor Rd1, and a pull-up resistor (not shown) of the external device. The peripheral identification unit 31 forms different current loops according to the common terminal, the switch K1, the pull-up resistor Rp1, or the pull-down resistor Rd1 and the external device, so as to detect whether the external device is connected to the pull-up resistor or the pull-down resistor. Specifically, the pull-up resistor Rp1 and the pull-down resistor of the external device form a series voltage dividing circuit, and the pull-down resistor Rd1 and the pull-up resistor of the external device form another series voltage dividing circuit. The two series branches may set the resistance values of the pull-up resistor Rp1 and the pull-down resistor Rd1 in the charging box according to different protocols, for example, in an external device, the resistance values of the pull-up resistor Rp1 and the pull-down resistor Rd2 in the charging box may be set to the same resistance value, and the resistance values of the pull-up resistor Rp1 and the pull-down resistor Rd1 in the charging box may be set to different values. Alternatively, the resistance values of the pull-up resistor Rp1 and the pull-down resistor Rd2 of the wireless earphone may be set to different values, and the resistance values of the pull-up resistor Rp1 and the pull-down resistor Rd1 in the charging box may be set to the same value, so that the peripheral identification unit 31 may determine whether the external connection is the charger or the wireless earphone according to the detected difference of the divided voltages.
The invention also provides a wireless earphone.
Referring to fig. 2, the wireless earphone includes:
a power storage assembly 210;
CC end and power supply end VBUS;
a peripheral matching circuit 220 connected to the CC terminal; the peripheral matching circuit 220 is configured to output corresponding identity information through the CC end when the wireless earphone is placed in the charging box, so as to implement handshake connection between the wireless earphone and the charging box;
an earphone controller 230 connected to the peripheral matching circuit 220; the charging box controller 140 is configured to receive the charging box to provide various charging currents/charging voltages after the wireless earphone is successfully connected with the charging box, and feed back the charging currents/charging voltages matched with the wireless earphone to the charging box, so that the charging box provides the matched charging currents/charging voltages.
In this embodiment, the wireless earphone may be a bluetooth earphone, or a wireless earphone such as an infrared earphone. The energy storage assembly 210 in the wireless headset is used to power an electrical load in the headset, which may be a speaker, microphone, indicator light, micro-motor, etc. The energy storage assembly 210 includes a battery for storing electric energy, and a charge control chip for converting a power supply outputted from the charging box into the battery for storing electric energy. The range of the stored electric energy of the battery can be set to 3.5-4.3V, and the battery can be realized by adopting rechargeable batteries such as dry batteries, lithium ion storage batteries or nickel-hydrogen batteries. The charge control chip generally has a sleep state, i.e., a standby state, a normal operation state, and an off state, based on the control of the headset controller 230.
The peripheral matching circuit 220 can be provided with a pull-down resistor Rd2, the resistance value of the pull-down resistor Rd2 is adjustable, and the identification between different models of the wireless earphone can be realized by adjusting the resistance value of the pull-down resistor Rd 2.
The headset controller 230 may be implemented using a dedicated wireless headset control chip within a wireless headset or may be implemented using a separate microprocessor, without limitation. The chip of the earphone controller 230 is provided with a feedback pin for receiving the battery voltage detection signal, and the earphone controller 230 can determine the current electric quantity of the battery according to the voltage detection signal, and can also perform overvoltage and undervoltage protection on the battery according to the signal. The earphone controller 230 may be a microprocessor such as a single-chip microcomputer, a DSP, and an FPGA, and those skilled in the art can implement setting of the voltage threshold of the battery by integrating some hardware circuits and software programs or algorithms in the earphone controller 230, for example, integrating a memory, an ADC conversion circuit, and a hardware circuit such as a filter, or a software algorithm program for analyzing and comparing the received voltage detection signals. The current energy storage component 210 is determined by running or executing a software program and/or module stored in the memory of the headset controller 230 and calling data stored in the memory, and an ADC conversion circuit integrated in the headset controller 230 converts the analog voltage detection signal into a digital signal and comparing, analyzing, etc. the voltage detection signal converted into the digital signal by a software algorithm program and/or hardware circuit module integrated in the headset controller 230. When the wireless earphone is connected to the charging box, after being in communication connection with the charging box, the earphone controller 230 outputs the charging requirement of the wireless earphone to the charging box, and the charging box charges the wireless earphone according to the charging requirement of the wireless earphone. Before charging or during charging, the headset controller 230 may send an ID packet, a version packet, a power packet, etc. to the charging box through the CC end, so as to implement communication with the charging box, so that the charging box determines a charging mode and a charging requirement of the wireless headset.
It may be appreciated that the electric energy output by the charging box may not match the electric energy output by the wireless earphone, and in some embodiments, a charging circuit is further provided in the wireless earphone, where the charging circuit may be implemented by using a charging chip, a DC-DC circuit, or the like, and converts the external voltage obtained by the charging port into a charging voltage of the battery, so as to charge each battery. In the process, the charging chip and the DC-DC circuit can boost, filter and the like the received electric energy, and can adjust the charging voltage, the charging current and the like according to the charging requirement.
In some embodiments, the wireless headset may further provide a voltage detection circuit for detecting the amount of power of the energy storage assembly 210 and outputting a voltage detection signal to the headset controller 230. The voltage detection circuit may specifically use discrete elements such as a resistor and a capacitor to form a serial voltage division circuit to detect the electric quantity of the energy storage component 210, or may use an integrated IC such as a voltage detection chip to detect the electric quantity, which is not limited herein. The wireless earphone and/or the charging box can be further provided with a current detection circuit for detecting the current value of the wireless earphone and adjusting the charging of the wireless earphone according to the current value of the wireless earphone. The voltage detection circuit can specifically adopt a resistor to realize current detection of the wireless earphone, and can also adopt an integrated IC such as a current detection chip to realize current detection, and the current detection is not limited herein. The wireless earphone can also be provided with an LED lamp, a buzzer or output a voice prompt through a loudspeaker, so that when the electric quantity value of the energy storage component 210 is smaller than the charging threshold value, a prompt signal indicating that the earphone needs to be charged is output, so as to remind a user to timely charge the wireless earphone. It is understood that the wireless headset and the charging box also have a charging interface through which the charging box and the wireless headset achieve power transfer.
When the wireless earphone is charged, the charging box and the wireless earphone realize role handshake, when the charging box controller 140 determines that the external equipment is connected to a pull-down resistor, the charging box is used as a source end, the wireless earphone is used as a sink end, the charging capability which can be provided by the charging box is broadcasted on a CC line when the charging box is received, source_cap data is sent by the charging box when the charging box is received, and charging current/voltage which can be provided by the charging box is obtained, for example, a charger can provide 5V 3A,9V 2A,12V 2.25A charging capabilities. The headset controller 230 replies good CRC data to the charging box, indicating that the data broadcast by the headset controller 230 is in a correct format, and after the CRC check is successful, sends request type data to the headset controller 230, indicating that the wireless headset requests the charging box to output a current/voltage output specification corresponding to the charging box according to three capabilities provided by the charging box. The charging box synchronizes the good CRC data of the wireless headset, the charging box makes a request to the headset controller 230 to indicate that the correct CRC check of the data format is successful, and sends Accept type data to indicate that the charging box accepts the request of the headset controller 230, so that the current/voltage output specification corresponding to the request can be provided. Subsequently, the charging cartridge sends py_rdy data to the headset controller 230 indicating that the charger is ready, the corresponding current/voltage will be output. In the process of charging, the wireless earphone is connected with the charging box through communication, and the charging current/voltage of the wireless earphone can be dynamically adjusted between the charging box and the wireless earphone, so that the charging efficiency of the wireless earphone is improved.
The invention also provides a charging method of the wireless earphone, which is suitable for the charging box and the wireless earphone.
Referring to fig. 3, the charging method of the wireless earphone includes the steps of:
step S100, after the charging box establishes connection with external equipment, identifying the identity type of the external equipment;
in this embodiment, the charging box can charge itself through the charger, also can provide the electric energy to wireless earphone, therefore when external equipment inserts, need carry out identification, specifically can realize identification through detecting whether external pull-down resistor or pull-up resistor on the CC end, realize the role handshake.
Step 200, when the identity type of the external device is identified as a wireless earphone, providing various charging currents/charging voltages for the wireless earphone so as to enable the wireless earphone to select and feed back;
in this embodiment, when the external device is identified as a headset, the headset is used as a sink terminal, the charging box is used as a source terminal, and the charging capability that can be provided by the charging box is broadcasted on the CC line, and source_cap data is sent to the wireless headset so as to provide charging current/voltage for the wireless headset, for example, the charging box can provide 5V 3A,9V 2A,12V 2.25A charging capabilities. The wireless earphone replies good CRC data to the charging box to indicate the data broadcast by the charging box, the format is correct, and after the CRC check is successful, request type data is sent to the charging box controller to indicate that the wireless earphone requests the charging box to output current/voltage output specifications corresponding to the charging box according to three capabilities provided by the charging box.
Step S300, according to the charging current/charging voltage returned by the wireless earphone, determining the charging current/charging voltage matched with the wireless earphone;
in this embodiment, the charging box synchronizes the good CRC data of the wireless headset, and the charging box sends the request data to the wireless headset to indicate that the correct CRC of the data format is successful, and sends Accept type data to indicate that the charging box accepts the request of the headset, so as to provide the current/voltage output specification corresponding to the request.
Step 400, outputting the matched charging current/charging voltage to charge the wireless earphone according to the matched charging current/charging voltage of the wireless earphone.
In this embodiment, the charging box is connected to a loop of the power supply terminal between the charging box and the wireless earphone, so as to charge the wireless earphone. In the charging process, the charging box and the wireless earphone feed back information such as voltage and current through the CC end, the charging box control circuit controls the power supply assembly to work according to the fed back voltage and current information, the output voltage and current of the charging box can be adjusted in real time, an Accept message is sent to the wireless earphone, and the wireless earphone can adjust the charging voltage and current of the charging circuit after receiving the Accept message; the wireless earphone can also dynamically send a Request message to Request the charging box to change the output voltage and current in the charging process, so that the rapid charging process is realized.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (9)
1. The charging box is characterized by being used for rapidly charging the USB-PD of the wireless earphone; comprising the following steps:
a power supply assembly;
CC end and power supply end VBUS; the charging box realizes identity recognition by detecting whether a pull-down resistor or a pull-up resistor is externally connected to the CC end, so that role handshake is realized;
the first input end of the power switch is connected with the power supply assembly, and the first output end of the power switch is connected with the power supply end;
the peripheral identification circuit is connected with the CC end; the peripheral identification circuit is configured to identify the identity type of the external equipment according to the identity information of the external equipment and output a corresponding peripheral identification signal;
the charging box controller is connected with the peripheral identification circuit; the charging box controller is stored with a PD charging protocol, and is configured to send all voltage and current list pairs supported by the charging box to the wireless earphone through the CC terminal when the external equipment is confirmed to be the wireless earphone according to the peripheral identification signal, so that the wireless earphone can select one voltage and current pair matched with the wireless earphone from the voltage and current list and feed back a selection result through the CC terminal;
The charging box controller is also used for configuring corresponding charging current/charging voltage according to the voltage and current pair fed back by the CC end, and controlling the power switch to be communicated with the power supply assembly and the loop of the power supply end so as to rapidly charge the USB-PD for the wireless earphone;
the charging box also comprises a magnetic USB port, the magnetic USB port comprises a power port and a CC port,
the power supply port of the magnetic USB port is used for connecting the power supply end with the power supply end of the earphone;
and the CC port of the magnetic USB port is used for connecting the CC end with the CC end of the earphone.
2. The charging box of claim 1, wherein the charging box controller is specifically configured to provide a plurality of charging currents/charging voltages to the wireless headset through the CC terminal, so that the wireless headset selects and feeds back the corresponding charging current/charging voltage, and output a matched charging current/charging voltage to charge the wireless headset according to the fed back charging current/charging voltage.
3. The charging cartridge of claim 1, further comprising a boost circuit, an input of the boost circuit being connected to the power supply assembly, an output of the boost circuit being connected to the power switch;
The charging box controller is further configured to control the boost circuit to work to match the charging current/charging voltage of the wireless earphone when the charging current/charging voltage of the wireless earphone is greater than the output current/voltage of the charging box.
4. The charging box according to claim 1, wherein the charging box controller is specifically configured to obtain, through the CC terminal, a plurality of charging currents/charging voltages provided by the charging device when the identity type of the external device is identified as the charging device according to the peripheral identification signal, and select an adapted charging current/charging voltage to perform charging of the charging box.
5. The charging cartridge of claim 1, wherein the charging cartridge further comprises:
a charging assembly;
the second input end of the power switch is connected with the power end, and the second output end of the power switch is connected with the charging.
6. The charging box according to claim 5, wherein the charging box controller is specifically configured to control the power switch to connect the charging assembly to the loop of the power source terminal so as to access the electric energy output by the charging device when the identity type of the external device is identified as the charging device according to the peripheral identification signal.
7. The charging box according to any one of claims 1 to 6, wherein the peripheral identification circuit comprises a switch, a pull-up resistor, a pull-down resistor and a peripheral identification unit, a common terminal of the switch is connected to the CC terminal, a first connection terminal of the switch is connected to one terminal of the pull-up resistor, and a second connection terminal of the switch is connected to one terminal of the pull-down resistor; the other end of the pull-up resistor is connected with a first direct current power supply; the other end of the pull-down resistor is grounded; the detection end of the peripheral identification unit is connected with the public end.
8. A wireless headset adapted for USB-PD quick charging using the charging cartridge of claim 1, comprising:
a charging assembly;
CC end and power supply end VBUS;
the peripheral matching circuit is connected with the CC end; the peripheral matching circuit is configured to output corresponding identity information through the CC end when the wireless earphone is placed into the charging box so as to realize handshake connection between the wireless earphone and the charging box;
the earphone controller is connected with the peripheral matching circuit; the charging box controller is configured to receive the charging box to provide various charging currents/charging voltages after the wireless earphone and the charging box are successfully connected in a handshaking manner, and feed back the charging currents/charging voltages matched with the wireless earphone to the charging box so that the charging box provides the matched charging currents/charging voltages.
9. A charging method of a wireless earphone, adapted to the charging box according to any one of claims 1 to 7, characterized in that the charging method of a wireless earphone comprises the steps of:
after the charging box establishes connection with external equipment, identifying the identity type of the external equipment;
when the identity type of the external equipment is identified as a wireless earphone, providing various charging currents/charging voltages for the wireless earphone so as to enable the wireless earphone to select and feed back;
determining the charging current/charging voltage matched with the wireless earphone according to the charging current/charging voltage returned by the wireless earphone;
and outputting the matched charging current/charging voltage to charge the wireless earphone according to the charging current/charging voltage matched with the wireless earphone.
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| CN112271774B (en) * | 2020-10-23 | 2022-09-09 | 维沃移动通信有限公司 | Charging box and electronic assembly |
| CN113162173A (en) * | 2021-04-22 | 2021-07-23 | 深圳市傲声智能有限公司 | Charging method, charging cartridge, and computer-readable storage medium |
| CN117397141A (en) * | 2021-05-08 | 2024-01-12 | 哈曼国际工业有限公司 | Charging device for wearable device and wearable device assembly |
| CN113873383A (en) * | 2021-09-27 | 2021-12-31 | 歌尔科技有限公司 | Earphone in-out box detection method and circuit, earphone box and earphone |
| CN114125629A (en) * | 2021-11-18 | 2022-03-01 | 歌尔科技有限公司 | Communication method, charging box, wireless earphone and communication system |
| CN114421547B (en) * | 2021-12-17 | 2023-06-30 | 广州辰创科技发展有限公司 | Intelligent charging method and system and intelligent charging side |
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