Wireless earphones and their circuits, charging box and its circuits, and charging box upgrade method

Abstract

The present invention relates to a wireless headset and its circuit, a charging box and its circuit, and a charging box upgrade method. The wireless headset circuit includes: a first battery; a first charging management unit, which manages the charging of the first battery and has a charging terminal; a first detection unit, which detects whether the voltage of the charging terminal is a first charging voltage or a second charging voltage greater than the first charging voltage; a first boost unit, which pre-charges the device with the second charging voltage; and a first upgrade unit, which sends a pulse signal to the first boost unit. When the first detection unit detects that the voltage of the charging terminal is the first charging voltage, the pulse signal causes the first boost unit to increase the charging terminal to a first voltage greater than the first charging voltage, so that the charging box circuit stops outputting the first charging voltage, so that the first upgrade unit sends a program code for upgrading the charging box to the charging box circuit through the charging terminal. The present invention can upgrade the charging box without connecting to special equipment, and the circuit structure is simple, which helps to reduce costs.

Description

Technical Field

[0001] The present invention relates to the field of earphone technology, and in particular to a wireless earphone and its circuit, a charging box and its circuit, and a charging box upgrading method. Background Art

[0002] Compared to wired earphones, wireless earphones are increasingly popular due to their portability and ease of use. With the continuous advancement of technology, charging box upgrades are inevitable. Traditionally, this involves connecting the charging box to a dedicated device, requiring users to visit a repair center for the upgrade, making the upgrade process inconvenient. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above-mentioned technical problems and provide a wireless headset and its circuit, a charging box and its circuit, and a charging box upgrade method. The charging box can be upgraded without connecting special equipment, which facilitates the upgrade operation and enables users to upgrade the charging box without feeling it. The circuit structure is simple, which helps to reduce costs.

[0004] In order to achieve the above-mentioned objectives, the present invention provides a wireless headset circuit on one hand, which includes: a first battery; a first charging management unit for managing the charging of the first battery and having a charging end that is disconnectably connected to the charging box circuit; a first detection unit for detecting that the charging voltage of the charging end is a first charging voltage or a second charging voltage greater than the first charging voltage; a first boost unit capable of pre-charging with the second charging voltage; a first upgrade unit for sending a pulse signal to the first boost unit, and when the first detection unit detects that the charging voltage of the charging end is the first charging voltage, the pulse signal causes the first boost unit to increase the voltage at the charging end to a first voltage greater than the first charging voltage, so that the charging box circuit stops outputting the first charging voltage to the charging end, so that the first upgrade unit can send a program code for upgrading the charging box to the charging box circuit through the charging end.

[0005] Optionally, the first boost unit includes: a capacitor; a charging module for charging the capacitor through the second charging voltage; and a switch module, arranged between the charging end and the capacitor, and the pulse signal is used to control the switching module to close, so that the capacitor releases energy and pulls the voltage at the charging end to the first voltage.

[0006] Optionally, the charging module includes: a diode, an anode of the diode being connected to the charging end, and a cathode of the diode being connected to the capacitor; or a switch being connected between the charging end and the capacitor; and a first comparator, a first input end of the first comparator being connected to the charging end, a second input end of the first comparator being connected to the capacitor, and an output end of the first comparator being connected to the switch to control the closing or opening of the switch.

[0007] Optionally, the first upgrade unit is also used to simultaneously send the pulse signal to the first charging management unit, and the pulse signal is used to cause the first charging management unit to stop charging the first battery; and / or, the first detection unit includes a second comparator, a first input end of the second comparator is connected to the charging end, a second input end of the second comparator is connected to a first reference voltage, and an output end of the second comparator is connected to the first upgrade unit, wherein the first reference voltage is greater than the first charging voltage and less than the second charging voltage and the first voltage.

[0008] Optionally, the first upgrade unit includes: an analog-to-digital converter for measuring the power level of the first battery; a wireless communication module and a first memory, the wireless communication module is used to receive the program code sent by the terminal device and store the program code in the first memory; wherein, the upgrade condition is that the program code is stored in the first memory and the power level of the first battery is greater than the power required for the upgrade, the first upgrade unit also includes: a first application processor for sending the pulse signal when the upgrade condition is met and converting the program code into high and low level signals and then sending them to the charging box circuit after a certain time after sending the pulse signal; or, a first application processor for sending the pulse signal when the upgrade condition is met and converting the program code into high and low level signals and then sending them to the charging box circuit after a certain time after sending the pulse signal; and a first communication module for adjusting the high and low level signals output by the first application processor to high and low level signals that meet the requirements of the charging box circuit.

[0009] A second aspect of the present invention provides a wireless headset, comprising the wireless headset circuit of the first aspect.

[0010] A third aspect of the present invention provides a charging box circuit, which includes: a second battery; a second charging management unit for managing the charging of the second battery; a second boost unit for adjusting the voltage of the second battery to one of a first charging voltage and a second charging voltage greater than the first charging voltage according to set requirements, and then outputting it to the charging end of the wireless headset circuit, wherein the second boost unit can charge the first boost unit of the wireless headset circuit when outputting the second charging voltage, so that when the charging box needs to be upgraded, the first boost unit can adjust the voltage at the charging end to a first voltage greater than the first charging voltage; a second detection unit and a second upgrade unit, wherein the second detection unit is configured to output a feedback signal to the second upgrade unit when detecting that the voltage at the charging end is the first voltage during the period when the second boost unit outputs the first charging voltage, so that the second upgrade unit outputs a first control signal to the second boost unit, wherein the first control signal causes the output end of the second boost unit to stop outputting the first charging voltage, so that the second upgrade unit can receive the program code for upgrading the charging box sent by the wireless headset circuit through the charging end.

[0011] Optionally, the setting requirement includes making the first time duration for the second boost unit to output the first charging voltage greater than the second time duration for outputting the second charging voltage; the second upgrade unit is used to send a setting instruction to the second boost unit and the second detection unit, and the setting instruction is used to set the value of the first charging voltage, the first time duration, the value of the second charging voltage and the second time duration; and / or, the second upgrade unit is also used to send a second control signal to the second boost unit after the upgrade is completed, and the second control signal is used to enable the second boost unit to continue to output the charging voltage to the charging end, and the setting requirement includes making the second boost unit output the second charging voltage for a set time after the upgrade is completed.

[0012] Optionally, the second detection unit includes a third comparator, an inverter, and a D-type flip-flop, wherein a first input of the third comparator is connected to the charging end, and a second input of the third comparator is connected to a second reference voltage, wherein the second reference voltage is greater than the first charging voltage and less than the first voltage; the output of the inverter is connected to the first input of the D-type flip-flop, the input of the inverter and the second input of the D-type flip-flop receive the setting instruction, the clock input of the D-type flip-flop is connected to the output of the third comparator, and the output of the D-type flip-flop outputs the feedback signal; or, the second upgrading unit includes a second communication module, a second application processor, and a second memory, wherein the second communication module is used to convert the high and low level signals representing the program code at the charging end into digital signals that can be recognized by the second application processor; the second application processor is used to convert the digital signal into the program code and update it into the second memory and send a control signal to the second boost unit.

[0013] A fourth aspect of the present invention provides a charging box, which includes the charging box circuit of the third aspect mentioned above.

[0014] A fifth aspect of the present invention provides a charging system, which includes the wireless earphone circuit of the first aspect and the charging box circuit of the third aspect.

[0015] The sixth aspect of the present invention provides an earphone assembly, which includes the wireless earphones of the second aspect and the charging box of the fourth aspect. The wireless earphones can be stored in the charging box, and the charging box can charge the wireless earphones.

[0016] 19. The method of claim 18, wherein the first voltage boost unit of the wireless headset circuit increases the voltage at the charging end to a first voltage greater than the first voltage when the first detection unit detects that the voltage at the charging end is a first charging voltage and meets an upgrade condition, so that the charging box circuit stops charging the charging end, wherein the first voltage boost unit can be charged in advance by a second voltage greater than the first voltage at the charging end, and the upgrade condition is that a program code for upgrading the charging box sent by a mobile terminal is stored in a first memory of the wireless headset circuit, and the power of the first battery of the wireless headset is greater than the power required for the upgrade; the first upgrade unit of the wireless headset circuit sends the program code to the charging box circuit through the charging end; and / or during charging, the second voltage boost unit of the charging box circuit adjusts the voltage of the second battery to one of the first charging voltage and the second charging voltage greater than the first charging voltage according to the set requirements and outputs it to the wireless headset circuit. A charging end of the earphone circuit, wherein the second boost unit is capable of charging the first boost unit of the wireless earphone circuit when outputting the second charging voltage, so that when the charging box needs to be upgraded, the first boost unit can adjust the voltage at the charging end to a first voltage greater than the first charging voltage; the second detection unit of the charging box circuit outputs a feedback signal to the second upgrade unit when detecting that the voltage at the charging end is the first voltage during the period when the second boost unit outputs the first charging voltage, so that the second upgrade unit outputs a first control signal to the second boost unit, the first control signal causing the output end of the second boost unit to stop outputting the first charging voltage, so that the second upgrade unit can receive the program code for upgrading the charging box sent by the wireless earphone circuit through the charging end and update it into the second memory; after the upgrade is completed, the second upgrade unit sends a second control signal to the second boost unit, and the second control signal causes the second boost unit to continue outputting the charging voltage to the charging end.

[0017] In the above technical solution, the charging box circuit can output one of a first charging voltage and a second charging voltage greater than the first charging voltage according to the set requirements. The set requirements can be, for example, that the charging box circuit outputs the first charging voltage most of the time and intermittently outputs the second charging voltage for a shorter time, that is, the time for outputting the first charging voltage is greater than the time for outputting the second charging voltage. The first boost unit of the wireless headset circuit can be pre-charged with the second charging voltage output to the charging end through the charging box circuit. When the first detection unit of the wireless headset circuit detects that the charging voltage of the charging end is the first charging voltage and meets the upgrade conditions, it can increase the voltage at the charging end to a first voltage greater than the first charging voltage to notify the charging box circuit to stop outputting the first charging voltage to the charging end, so that the first upgrade unit sends the charging box upgrade program code to the charging box circuit through the charging end. Since the second charging voltage is greater than the first charging voltage, the first boost unit does not need to set up a complex boost circuit to achieve the voltage at the charging end being increased to the first voltage greater than the first charging voltage, which helps to simplify the circuit structure of the first boost unit and thus reduce the cost of the wireless headset circuit. Moreover, the charging box can be upgraded without connecting to special equipment, which facilitates the upgrade operation and enables users to upgrade the charging box without feeling it.

[0018] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a structural diagram of a wireless headset charging system;

[0021] Figure 2 A schematic structural diagram of a wireless headset circuit provided in an embodiment of the present application;

[0022] Figure 3 This is a schematic diagram of the structure of the first solution of the charging module;

[0023] Figure 4 This is a schematic diagram of the structure of the second solution of the charging module;

[0024] Figure 5 It is a structural diagram of the switch module;

[0025] Figure 6 is a structural schematic diagram of the first detection unit;

[0026] Figure 7 is a structural diagram of the first communication module;

[0027] Figure 8 A schematic diagram of the structure of a charging box circuit provided in an embodiment of the present application;

[0028] Figure 9 is a structural schematic diagram of the second detection unit;

[0029] Figure 10 is a structural diagram of the second communication module;

[0030] Figure 11 A schematic diagram of the structure of a wireless headset charging system provided in an embodiment of the present application;

[0031] Figure 12 A flowchart of a charging box upgrade method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] Figure 1 The figure is a schematic diagram of a wireless headset charging system. The wireless headset may be a True Wireless Stereo (TWS) headset. Figure 1As shown, the charging system includes a first circuit 100 located in the TWS headset and a second circuit 200 located in the charging box. The first circuit 100 includes a first battery BAT1, a first charging management circuit 101, a setting module 102, an analog-to-digital converter ADC 103, and a radio frequency circuit RF 104. The first charging management circuit 101 is used to charge the first battery BAT1, the setting module 102 is used to set the charging current of the first charging management circuit 101, the ADC 103 is used to measure the power level of the first battery BAT1, and the RF 104 is used to receive audio signals. The second circuit 200 includes a second battery BAT2, a second charging tube circuit 201, and a boost circuit 202. The second charging tube circuit 201 charges the second battery BAT2. The boost circuit 202 boosts the voltage of the second battery BAT2 to a set voltage and outputs it to the charging terminal VCHG. The set voltage is, for example, 5V, i.e., the voltage of VCHG is 5V. The first charging management circuit 101 in the TWS headset charges the first battery BAT1 with a 5V voltage. When upgrading the charging box, the charging box needs to be connected to a dedicated device. This requires the user to go to a repair center for the upgrade, making the upgrade operation very inconvenient.

[0034] In view of this, the embodiments of the present application provide a wireless headset and its circuit, a charging box and its circuit, and a charging box upgrade method, which can upgrade the charging box without connecting special equipment, facilitate the upgrade operation, and enable users to upgrade the charging box without feeling it. The circuit structure is simple, which helps to reduce costs.

[0035] Figure 2 This is a schematic diagram of the structure of a wireless headset circuit provided in an embodiment of the present application. Figure 2As shown, the wireless headset circuit includes a first battery BAT1, a first charge management unit 11, a first upgrade unit 12, a first boost unit 13, and a first detection unit 14. The first charge management unit 11 is used to manage the charging of the first battery BAT1 and has a charging terminal VCHG that is disconnectably connected to the charging case circuit. The first detection unit 14 is used to detect whether the charging voltage at the charging terminal VCHG is a first charging voltage or a second charging voltage greater than the first charging voltage. The first boost unit 13 can be pre-charged with the second charging voltage. The first upgrade unit 12 is used to send a pulse signal Init to the first boost unit 13. Specifically, the first upgrade unit 12 can send the pulse signal Init when the first detection unit 14 detects that the charging voltage at the charging terminal VCHG is the first charging voltage and meets the upgrade condition. The pulse signal Init causes the first boost unit 13 to increase the voltage at the charging terminal VCHG to a first voltage greater than the first charging voltage, causing the charging case circuit to stop outputting the first charging voltage to the charging terminal VCHG. This allows the first upgrade unit 12 to send the program code for upgrading the charging case to the charging case circuit via the charging terminal VCHG.

[0036] The pulse signal Init may also be another form of upgrade instruction, which can cause the first boost unit 13 to increase the voltage at the charging terminal VCHG to a first voltage greater than the first charging voltage for a period of time. Furthermore, on the basis of enabling the charging box circuit to recognize the first voltage, the "period of time" here should be as short as possible to reduce the performance requirements of the first boost unit 13.

[0037] That is to say, the charging box circuit can output one of a first charging voltage and a second charging voltage greater than the first charging voltage according to the set requirements. The set requirements can, for example, be to make the charging box circuit output the first charging voltage most of the time and intermittently output the second charging voltage for a shorter time, that is, the time for outputting the first charging voltage is greater than the time for outputting the second charging voltage. The first boost unit 13 of the wireless headset circuit can pre-charge the second charging voltage output to the charging terminal VCHG through the charging box circuit. When the first detection unit 14 of the wireless headset circuit detects that the charging voltage of the charging terminal VCHG is the first charging voltage and meets the upgrade condition, it can increase the voltage at the charging terminal VCHG to a first voltage greater than the first charging voltage to notify the charging box circuit to stop outputting the first charging voltage to the charging terminal VCHG, so that the first upgrade unit 12 sends the charging box upgrade program code to the charging box circuit through the charging terminal VCHG. Since the second charging voltage is greater than the first charging voltage, the first boost unit 13 does not need to set up a complex boost circuit to achieve the voltage at the charging terminal VCHG being increased to the first voltage greater than the first charging voltage, which helps to simplify the circuit structure of the first boost unit 13, thereby reducing the cost of the wireless headset circuit. Moreover, the charging box can be upgraded without connecting to special equipment, which facilitates the upgrade operation and enables users to upgrade the charging box without feeling it.

[0038] The first boost unit 13 includes a capacitor C131, a charging module 132, and a switch module 133. The charging module 132 is used to charge the capacitor C131 using a second charging voltage. The switch module 133 is disposed between the charging terminal VCHG and the capacitor C131. The pulse signal Init is used to control the switch module 133 to close, causing the capacitor C131 to release energy and raise the voltage at the charging terminal VCHG to the first voltage. It should be noted that the first voltage can be lower than the second charging voltage. This eliminates the need for a boost circuit in the charging module 132, resulting in a simpler structure and lower costs.

[0039] Reference below Figure 3-Figure 4 Two schemes of the charging module are described below. It is understandable that the specific structure of the charging module 132 can include but is not limited to these two schemes.

[0040] Figure 3 This is a schematic diagram of the structure of the first solution of the charging module. Figure 3As shown, the charging module 132 may include a diode D, the anode of the diode D is connected to the charging terminal VCHG, and the cathode of the diode D is connected to the capacitor C131. In this way, when the charging box circuit outputs the second charging voltage to the charging terminal VCHG, the anode voltage of the diode D is higher than the cathode voltage, the diode D is turned on, and the capacitor C131 can be charged. When the charging box circuit outputs the first charging voltage to the charging terminal VCHG, the anode voltage of the diode D is lower than the cathode voltage, the diode D is not turned on, and the capacitor C131 is not charged. That is, the diode is in the cut-off state, preventing the charge on the capacitor C131 from being discharged. After multiple charges, the voltage VC of the capacitor C131 will reach the highest voltage value of the charging terminal VCHG, that is, the second charging voltage. In addition, when the capacitor C131 discharges and pulls up the voltage of the charging terminal VCHG, the charging terminal VCHG may not actually be able to rise to a voltage completely equal to VC. The specific voltage depends on the power consumption current on the charging terminal VCHG, the capacitance of the VC node, and the capacitor connected to the charging terminal VCHG. Although it cannot reach a voltage completely equal to VC, it will be pulled up more, as long as it is sufficient to be recognized by the charging box circuit (specifically, the second detection unit 23 to be introduced below).

[0041] Figure 4 This is a schematic diagram of the structure of the second solution of the charging module. Figure 4 As shown, the charging module 132 may include a switch SW11321 and a first comparator com11322. The switch SW11321 is connected between the charging terminal VCHG and the capacitor C131. A first input terminal of the first comparator com11322 is connected to the charging terminal VCHG, a second input terminal of the first comparator com11322 is connected to the capacitor C131, and an output terminal of the first comparator com11322 is connected to the switch 1321 to control the closing or opening of the switch 1321. Specifically, when the charging box circuit outputs the second charging voltage to the charging terminal VCHG, the voltage received by the first input terminal of the first comparator com11322 is greater than the voltage received by the second input terminal from the capacitor C131, and the output terminal of the first comparator com11322 outputs a first control signal such as a high level, so that the switch SW11321 is turned on to charge the capacitor C131; when the charging box circuit outputs the first charging voltage to the charging terminal VCHG, the voltage received by the first input terminal of the first comparator com11322 is less than the voltage received by the second input terminal from the capacitor C131, and the output terminal of the first comparator com11322 outputs a second control signal such as a low level, so that the switch SW11321 remains disconnected and will not charge the capacitor C131, and at the same time prohibits VC from discharging to the charging terminal VCHG, so that the capacitor C131 is in a voltage maintenance state.

[0042] Figure 5 Figure 2 is a schematic diagram of the switch module structure. Figure 5As shown, the switch module 133 can be composed of a controlled switch SW2 provided between the capacitor C (the voltage of the capacitor C is VC) and the charging terminal VCHG. When the pulse signal Init sent by the first upgrade unit 12 (specifically, the first application processor 124 in the first upgrade unit 12 to be described below) is received, the pulse signal Init signal can be high, the control switch SW2 is turned on, the capacitor C releases energy, and the voltage of the charging terminal VCHG is pulled up to a higher first voltage to be recognized by the charging box circuit (such as the second detection unit 23 to be described below). At this time, the voltage at the charging terminal VCHG is controlled by the capacitor C; and when the pulse signal Init ends, the switch SW2 is disconnected, and the voltage at the charging terminal VCHG is no longer controlled by the capacitor C. In this way, after the charging box upgrade is completed, the charging box circuit can continue to charge the first battery BAT1 of the wireless headset circuit through the charging terminal VCHG.

[0043] Figure 6 It is a structural diagram of the first detection unit. Figure 6 As shown, the first detection unit 14 may include a second comparator com2141, a first input terminal of the second comparator com2141 connected to the charging terminal VCHG, a second input terminal of the second comparator com2141 connected to the first reference voltage VREF1, and an output terminal of the second comparator com2141 connected to the first upgrading unit 12, specifically, connected to the first application processor 124 (described below) of the first upgrading unit 12. The first reference voltage VREF1 is greater than the first charging voltage and less than the second charging voltage and the first voltage. In this way, when the charging box circuit outputs the first charging voltage to the charging terminal VCHG, that is, the first output terminal of the second comparator 141 receives the first charging voltage, since the first charging voltage is less than the first reference voltage VREF1, the output terminal of the second comparator com2141 can output a first signal such as a low level to the first upgrade unit 12, and the first upgrade unit 12 can send a pulse signal Init to the first boost unit 13 when it determines that the upgrade condition is met; when the charging box circuit outputs the second charging voltage to the charging terminal VCHG or when the first boost unit increases the voltage of VCHG to the first voltage, that is, the first output terminal of the second comparator com2141 receives the second charging voltage or the first voltage, since the second charging voltage and the first voltage are greater than the first reference voltage VREF1, the output terminal of the second comparator com2141 can output a second signal such as a high level to the first upgrade unit 12. Since the second signal output by the second comparator com2141 indicates that the voltage at the charging terminal VCHG is not the first charging voltage, the first upgrade unit 12 will not send a pulse signal Init to the first boost unit 13.

[0044] Continue to refer Figure 2Specifically, the first upgrade unit 12 may include a wireless communication module 121, a first memory 122, an analog-to-digital converter ADC 123 and a first application processor 124. The wireless communication module 121 is used to receive the program code for upgrading the charging box sent by the terminal device and store it in the first memory 122. The analog-to-digital converter ADC 123 is used to measure the power of the first battery BAT1. The upgrade condition is that the program code is stored in the first memory 122 and the power of the first battery BAT1 of the wireless headset is greater than the power required for the upgrade. The first application processor 124 is used to send a pulse signal Init when the upgrade condition is met and convert the program code stored in the first memory 122 into a high and low level signal after a certain time of sending the pulse signal Init, and then send it to the charging box circuit through the charging terminal VCHG. Since the pulse signal Init is used to enable the first boost unit 13 to increase the voltage at the charging terminal VCHG to the first voltage so that the charging box circuit stops outputting the charging voltage to the charging terminal VCHG, the program code stored in the first memory 122 is converted into a high and low level signal and sent to the charging box circuit a certain time after the pulse signal Init is sent. This can ensure that the charging box circuit has stopped outputting the charging voltage to the charging terminal VCHG and can receive the program code for upgrading the charging box.

[0045] It should be noted that the program code used to upgrade the charging box is generally a binary number consisting of 0 / 1, and can be composed of multiple binary digits, for example, 8 bits, 16 bits, 32 bits, or 64 bits. Of course, it can also include instructions, which can be encoded according to certain rules. In addition, the digital signal can also be designed based on the time pulse width. For example, a high level time greater than a certain time represents a binary digit 1, and a high level time less than a certain time represents a binary digit 0.

[0046] Furthermore, the "high and low level signals" output by the first application processor 124 may be lower than the voltage value of the first battery BAT1. In this way, when the program code is sent through the charging terminal VCHG, due to the low voltage at VCHG, the first charging management unit 11 will not use the voltage at VCHG to charge the first battery BAT1. In addition, the first upgrade unit 12 may also include a first communication module 125, which is used to adjust the high and low level signals output by the first application processor 124 to high and low level signals that meet the requirements of the charging box circuit for identification in the charging box. This is because the level of the digital signal output by the first application processor 124 is generally relatively low, for example, the high level is only 0.4V and the low level is 0V. In order to be compatible with more common situations, the signal output by the first application processor 124 can be converted into a relatively high level through the first communication module 125, for example, the high level is 1.8V and the low level is 0V.

[0047] Figure 7It is a structural diagram of the first communication module. Figure 7 As shown, the first communication module 125 includes a level conversion circuit 1251 and a switch SW31252 connected in series between the first application processor 124 and the charging terminal VCHG. The level conversion circuit 1251 is used to adjust the high and low level signals output by the first application processor 124 to the high and low level signals required by the charging box circuit. The first application processor 124 is connected to the switch SW31252 to control the opening and closing of the switch SW31252. Specifically, when the stop signal received from the first application processor 124 is at a high level, the switch SW31252 is closed and turned on. The level conversion circuit 1251 converts the signal output by the first application processor 124 and then sends it to the charging box. The wireless headset circuit can send the program code for upgrading the charging box to the charging box circuit. When the stop signal received from the first application processor 124 is at a low level, the switch SW31252 is opened, and the wireless headset circuit does not send the program code for upgrading the charging box to the charging box circuit. Furthermore, the first communication module 125 may also include an inverter INV11253, which is connected in series between the first application processor 124 and the switch SW31252. In this way, when the stop signal sent by the first application processor 124 is at a high level, it becomes a low level after passing through the inverter INV11253, controlling the switch SW31252 to be disconnected, and the output signal VCHG becomes a high-impedance state; when the stop signal sent by the first application processor 124 is at a low level, it becomes a high level after passing through the inverter INV11253, controlling the switch SW31252 to be closed and turned on, and the DATA signal from the first application processor 124 generates appropriate high and low level signals through the level conversion circuit 1251, and is output to the charging terminal VCHG to meet the high and low level requirements of the charging box circuit.

[0048] Since the first voltage of the charging terminal VCHG is greater than the first charging voltage output by the charging box circuit, the first charging management unit 11 can use the first voltage at the charging terminal VCHG to charge the first battery BAT1. In order to reduce the energy consumption of the capacitor C131, the capacitor C131 can adopt a relatively small capacitance value and reduce the design difficulty and cost of the charging module 132. Figure 2As shown, the first upgrade unit 12 can also be used to simultaneously send a pulse signal Init to the first charging management unit 11, and the pulse signal Init is used to make the first charging management unit 11 stop charging the first battery BAT1. That is, the first application processor 124 in the first upgrade unit 12 can be configured to simultaneously send the pulse signal Init to the switch module 133 in the first boost unit 13 and the first charging management unit 11, so that when the first boost unit 13 increases the voltage of the charging terminal VCHG to the first voltage, the first charging management unit 11 stops charging the first battery BAT1, for example, the first charging management unit 11 disconnects the charging connection with the first battery BAT1. When the duration of the pulse signal Init ends, the switch module 133 (i.e. Figure 5 The switch SW2 in the charging box is disconnected, and the first charging management unit 11 restores the charging connection with the first battery BAT1. When the charging voltage output by the charging box circuit is received at the charging terminal VCHG (the wireless headset sends the charging box upgrade program code to the charging box, and the charging box resumes charging after the upgrade is completed), the first charging management unit 11 continues to use the voltage of the charging terminal VCHG to charge the first battery BAT1.

[0049] An embodiment of the present invention further provides a wireless headset, which includes the above-mentioned wireless headset circuit.

[0050] Figure 8 This is a schematic diagram of the structure of a charging box circuit provided in an embodiment of the present application. Figure 8As shown, the charging box circuit includes a second battery BAT2, a second charging management unit 21, a second boost unit 22, a second detection unit 23, and a second upgrade unit 24. The second charging management unit 21 is used to manage the charging of the second battery BAT2. The second boost unit 22 is used to adjust the voltage of the second battery BAT2 to one of a first charging voltage and a second charging voltage greater than the first charging voltage according to the set requirements, and then output it to the charging terminal VCHG of the wireless headset circuit. When the second boost unit 22 outputs the second charging voltage, it can charge the first boost unit 13 of the wireless headset circuit, so that when the charging box needs to be upgraded, the first boost unit 13 can adjust the voltage at the charging terminal VCHG to a first voltage greater than the first charging voltage. The second detection unit 23 is configured to, when detecting that the voltage at the charging terminal VCHG is the first voltage while the second boost unit 22 is outputting the first charging voltage, output a feedback signal, renew, to the second upgrade unit 24, causing the second upgrade unit 24 to output a first control signal to the second boost unit 22. The first control signal causes the output terminal of the second boost unit 22 to stop outputting the first charging voltage, allowing the second upgrade unit 24 to receive program code for upgrading the charging case, transmitted from the wireless headset circuit via the charging terminal VCHG. Furthermore, the second upgrade unit 24 is configured to send a second control signal to the second boost unit 22 after the upgrade is complete, causing the second boost unit 22 to resume outputting the charging voltage to the charging terminal VCHG. Because adjusting the voltage at the charging terminal VCHG to the first voltage during the upgrade consumes power, the set requirements may include a set time for the second boost unit 13 to output the second charging voltage after the upgrade is complete. This ensures that the first boost unit 13 of the wireless headset circuit can be charged promptly.

[0051] Among them, the second boost unit 22 should adopt a synchronous boost circuit, that is, when it is turned off, its output can be in a high-impedance state; while the asynchronous boost circuit has leakage in its diode (from the input to the output node), which makes it impossible for the output to be in a high-impedance state, which will hinder the transmission of information from the TWS headset to the charging box. In addition, the setting requirements include making the first time length of the second boost unit 22 outputting the first charging voltage longer than the second time length of the second charging voltage output. That is to say, the second boost unit 22 mainly outputs a lower voltage to the charging end most of the time, and intermittently outputs a higher voltage for a shorter time, which helps to reduce power consumption.

[0052] Furthermore, the second upgrading unit 24 can be configured to send a setting instruction to the second boosting unit 22 and the second detecting unit 23, wherein the setting instruction is configured to set the first charging voltage value, the first duration, the second charging voltage value, and the second duration. Alternatively, the first charging voltage value, the first duration, the second charging voltage value, and the second duration can also be configured by the second boosting unit 22 itself.

[0053] Specifically, the second upgrade unit 24 may include a second communication module 241, a second application processor 242, and a second memory 243. The second communication module 241 is used to convert the high and low level signals representing the charging box upgrade program code at the charging terminal VCHG into digital signals that can be recognized by the second application processor 242. The second application processor 242 is used to convert the digital signal into the program code for upgrading the charging box and update it to the second memory 243 and send a control signal to the second boost unit 22. In addition, it should be noted that when the charging box is normally charging the wireless headset, the second communication module 241 does not use the signal at the charging terminal VCHG and can be ignored; only when the second boost unit 22 stops outputting the charging voltage to the charging terminal VCHG, the second communication module 241 starts to recognize the signal at the charging terminal VCHG.

[0054] Figure 9 It is a structural diagram of the second detection unit. Figure 9 As shown, the second detection unit 23 may include a third comparator com3231, an inverter INV2232 and a D-type flip-flop ffdr 233, wherein a first input terminal of the third comparator com3231 is connected to the charging terminal VCHG, and a second input terminal of the third comparator com3231 is connected to a second reference voltage, wherein the second reference voltage is greater than the first charging voltage and less than the first voltage; an output terminal of the inverter INV2232 is connected to a first input terminal d of the D-type flip-flop ffdr233, an input terminal of the inverter INV2232 and a second input terminal r of the D-type flip-flop ffdr233 receive a setting instruction VSET, a clock input terminal ck of the D-type flip-flop ffdr 233 is connected to the output terminal of the third comparator com3231, and an output terminal q of the D-type flip-flop ffdr 233 outputs a feedback signal renew.

[0055] When the voltage at the charging terminal VCHG changes from the first charging voltage, such as 4.8V, to the first voltage, such as 5.1V, the output terminal of the third comparator com3231 outputs a rising edge. Here, if the setting instruction VSET received by the inverter INV2232 and the second input terminal r of the D-type flip-flop ffdr 233 is a low level representing the first charging voltage, the first input terminal d of the D-type flip-flop ffdr233 receives a high level after passing through the inverter INV2232, and the high level of the first input terminal d is latched into the output terminal as the feedback signal renew, causing the output terminal of the second boost unit 22 to stop outputting the charging voltage to the charging terminal VCHG. If the setting instruction VSET received by the second input terminal r of the D-type flip-flop ffdr233 is a high level representing the second charging voltage, the first output terminal d of the D-type flip-flop ffdr 233 receives a low level after passing through the inverter 232, and the low level of the first input terminal d is latched into the output terminal, causing the output terminal of the second boost unit 22 to continue outputting the charging voltage to the charging terminal. The rising edge of the feedback signal renew indicates that the earphones have detected that the charging case needs a software upgrade. When the second application processor 242 detects the rising edge of the feedback signal renew, it controls the control signal OFF output to the second boost unit 22 to a high level, shutting down the output of the second boost unit 22 and allowing the earphones to send information to the charging case via the charging terminal VCHG. In other words, when the second application processor 242 sets the voltage of the second boost unit 22 to a lower voltage, such as 4.8V, via the setting instruction VSET, but the second detection unit 23 detects that the voltage of the charging terminal VCHG is the higher first voltage of 5.1V, it indicates that the earphones are sending a command to the charging case requesting an upgrade.

[0056] Figure 10 It is a structural diagram of the second communication module. Figure 10 As shown, the second communication module 241 can be a Schmitt trigger. For example, its flip threshold voltage can be designed to be 0.9V and 0.8V. That is, when the voltage of the input charging terminal VCHG is greater than 0.9V, its output DO is high; when the voltage of the input charging terminal VCHG is less than 0.8V, its output DO is low. There is a 0.1V difference between 0.9V and 0.8V. This difference is called hysteresis voltage. The hysteresis voltage can prevent the output signal from erroneously flipping or fluctuating repeatedly near the flip threshold due to the circuit itself or environmental noise. For example, when the charging terminal VCHG drops from, for example, 0.95V, if it is still greater than 0.8V, the output remains high until it falls below 0.8V, at which point it changes to a low level. When the charging terminal VCHG rises from, for example, 0.6V, if it is still less than 0.9V, the output remains low until it rises above 0.9V, at which point it changes to a high level.

[0057] In addition, an embodiment of the present invention further provides a charging box, which includes the above-mentioned charging box circuit. Furthermore, an embodiment of the present invention further provides an earphone assembly, which includes the above-mentioned wireless earphones and the above-mentioned charging box, and the wireless earphones can be stored in the charging box, and the charging box can charge the wireless earphones.

[0058] Figure 11 This is a schematic diagram of the structure of a wireless headset charging system provided in an embodiment of the present application. The charging system includes the above-mentioned wireless headset circuit 1 ( Figure 11 The circuit in the dotted box on the right) and the above-mentioned charging box circuit 2 ( Figure 11 The circuit in the dotted box on the left of FIG). Among them, the wireless earphone circuit 1 is located in the TWS earphone; the charging box circuit 2 is located in the charging box. Figure 11 As shown, in the wireless headset circuit 1, the wireless communication module 121 can receive the program code for upgrading the charging box sent by a terminal device such as a mobile phone and store the program code in the first memory 122. Among them, the wireless communication module 121 can be a radio frequency circuit, and the mobile phone can send the charging box upgrade software to the TWS headset by sending a radio frequency signal. The analog-to-digital converter ADC 123 detects the voltage of the first battery BAT1 in the TWS headset and sends its voltage information to the first application processor 124. The first application processor 124 determines that the voltage of the first battery BAT1 is greater than a certain threshold, such as 3.5V, indicating that the first battery BAT1 has sufficient power to support the upgrade operation.

[0059] The capacitor charging module 132 in the wireless headset circuit charges capacitor C131 based on the voltage at the charging terminal VCHG. Specifically, when the voltage at the charging terminal VCHG is a higher second charging voltage value, such as 5.2V, capacitor C can be charged. When the voltage at the charging terminal VCHG is a lower first charging voltage value, such as 4.8V, capacitor C131 is not charged, and the voltage of capacitor C131 remains unchanged. This allows the voltage of capacitor C131 to be charged to the higher voltage value. In other words, the charging module 132 can pre-charge capacitor C131 with a second charging voltage greater than the first charging voltage, which is output to the charging terminal VCHG by the charging box circuit.

[0060] When the first application processor 124 determines that the voltage of the charging terminal VCHG detected by the first detection unit 14 is a lower first charging voltage (for example, the output signal of the first detection unit 14 is a low level, which indicates that the charging terminal VCHG is at a lower voltage value at this time) and two upgrade conditions are met, that is, it is detected that the program code for upgrading the charging box exists in the first memory 122 and there is sufficient power in the first battery BAT1 to support the upgrade operation, the first application processor 124 sends a pulse signal Init, which can be a high-level pulse. After receiving the high-level pulse, the switch module 133 can be closed to release the energy of the capacitor C131 and pull the voltage of the charging terminal VCHG to the first voltage, thereby notifying the charging box to perform relevant preparatory operations before the upgrade, even if the second boost unit 22 stops outputting the charging voltage to the charging terminal VCHG. Then, after waiting for a certain delay time, the first application processor 124 transmits data to the first communication module 125, and the first communication module 125 outputs the digital signal to the charging terminal VCHG. At this time, since the second boost unit 22 has been turned off, there will be no voltage conflict. Among them, the "certain delay time" should be greater than the reaction delay time TD of the second boost unit 22 in the charging box. Specifically, the reaction delay time TD includes the time Td1 detected by the second detection unit 23 and the delay time Td2 from the second boost unit 22 receiving the notification of shutting down the output to the control output completely becoming a high-impedance state.

[0061] In the charging case circuit 2, the second charge management unit 21 charges the second battery BAT2. Its input voltage is typically 5V, and its output is connected to the second battery BAT2 for charging. The second boost unit 22 boosts the voltage of the second battery VBAT2 to either a first charging voltage (e.g., 4.8V (low voltage)) or a second charging voltage (e.g., 5.2V (high voltage)) according to the specified requirements. The second boost unit 22 then supplies power to the first charge management unit 11 in the TWS earphones via the charging terminal VCHG. Specifically, the second boost unit 22 outputs 4.8V for a period of time (e.g., 5000ns) and intermittently outputs 5.2V for shorter periods (e.g., 500ns). The first charging voltage must be higher than the full charge voltage of the first battery BAT1 to ensure that the first battery BAT1 can be fully charged by the first charge management unit 11. The lower voltage level (e.g., 4.8V) and the higher voltage level (e.g., 5.2V) can be fixed internally by the second boost unit 22 or configured and modified by the second application processor 242.

[0062] The function of the second detection unit 23 is to detect the voltage of the charging terminal VCHG. When it detects that the voltage of the charging terminal VCHG is a first voltage, such as 5.1V, during the period when the second boost unit 22 outputs the first charging voltage (the actual design can be other values, as long as it is higher than the first charging voltage normally output by the second boost unit 22, but generally less than the second charging voltage), it is determined that the TWS headset wants to upgrade the software in the charging box. The feedback signal renew output by the second detection unit 23 becomes a high level, controlling the second boost unit 22 to shut down and stop supplying power to the charging terminal VCHG. The second communication module 241 can receive high and low level signals from the charging terminal VCHG and convert this signal into a digital signal that can be recognized by the second application processor 242. The digital signal may include the upgrade program code of the charging box. The second communication module 241 outputs the digital signal to the second application processor 242. The second application processor 242 can convert the digital signal into the upgrade program code and update the upgrade program code to the second memory 243 to achieve the upgrade of the charging box.

[0063] It should be noted that in order to notify the charging case circuit to stop charging the charging terminal VCHG in order to receive the program code sent by the wireless headset circuit for upgrading the charging case, the first voltage at the charging terminal VCHG needs to be greater than the first charging voltage output by the charging case circuit. This is because when the second boost unit 22 outputs a first charging voltage, such as 4.8V, to charge the first battery BAT1 in the wireless headset, the headset side generally cannot output a voltage lower than 4.8V. Even if the headset output voltage is lower than 4.8V, it will not be reflected at the charging terminal VCHG, but will be controlled by the higher 4.8V voltage. This makes it inconvenient to notify the charging case to prepare for receiving the upgrade program. Because the second boost unit 22 has no current discharge capability, it can output a higher voltage to the charging terminal VCHG to achieve the notification function. Therefore, the output voltage of the charging module 132 is designed to be a first voltage, such as 5.1V, that is greater than the first charging voltage, such as 4.8V, output by the second boost unit 22. The charging module 132 is used to store energy in the capacitor C in advance, and the voltage at the charging terminal VCHG is pulled up to the first voltage by releasing the energy of the capacitor C 131 during the period when the second boost unit 22 outputs the first charging voltage, thereby achieving the purpose of notifying the charging box that an upgrade is required.

[0064] Figure 12 This is a flowchart of a charging box upgrade method provided in an embodiment of the present application. Figure 12 As shown, the charging box upgrade method includes the following steps:

[0065] In step S1201, during charging, the second boost unit of the charging box circuit adjusts the voltage of the second battery to one of a first charging voltage and a second charging voltage greater than the first charging voltage according to the set requirements, and then outputs it to the charging end of the wireless headset circuit. When the second boost unit outputs the second charging voltage, it can charge the first boost unit of the wireless headset circuit.

[0066] Moreover, the first charging voltage is greater than the full voltage of the first battery in the wireless headset circuit, ensuring that when the second boost unit of the charging box circuit outputs the first charging voltage, it can also charge the first battery and fully charge the first battery.

[0067] In step S1202, when the first detection unit detects that the voltage at the charging end is the first charging voltage and meets the upgrade condition, the first boost unit of the wireless headset circuit raises the voltage at the charging end to a first voltage greater than the first charging voltage, wherein the upgrade condition is that the first memory of the wireless headset circuit stores a program code for upgrading the charging box sent by the mobile terminal, and the power of the first battery of the wireless headset is greater than the power required for the upgrade.

[0068] In step S1203, when the second detection unit of the charging box circuit detects that the voltage at the charging end is the first voltage during the period when the second boost unit outputs the first charging voltage, it outputs a feedback signal to the second upgrade unit to enable the second upgrade unit to output a first control signal to the second boost unit. The first control signal causes the output end of the second boost unit to stop outputting the first charging voltage.

[0069] In step S1204, the first upgrade unit of the wireless headset circuit sends the program code to the charging box circuit through the charging terminal.

[0070] In step S1205, the second upgrading unit receives the program code for upgrading the charging box sent by the wireless headset circuit through the charging end and updates it into the second memory.

[0071] In step S1206, after the upgrade is completed, the second upgrade unit of the charging box circuit sends a second control signal to the second boost unit, and the second control signal enables the second boost unit to continue to output the charging voltage to the charging end.

[0072] In summary, the charging box circuit can output one of a first charging voltage and a second charging voltage greater than the first charging voltage according to set requirements. The first boost unit of the wireless headset circuit can pre-charge the second charging voltage output to the charging terminal through the charging box circuit. When the first detection unit of the wireless headset circuit detects that the charging voltage of the charging terminal is the first charging voltage and meets the upgrade condition, the voltage at the charging terminal can be increased to a first voltage greater than the first charging voltage, thereby notifying the charging box circuit to stop outputting the first charging voltage to the charging terminal, so that the first upgrade unit can send the charging box upgrade program code to the charging box circuit through the charging terminal. Because the second charging voltage is greater than the first charging voltage, the first boost unit does not need to be provided with a complex boost circuit to achieve the voltage at the charging terminal to the first voltage greater than the first charging voltage, which helps to simplify the circuit structure of the first boost unit and thus reduce the cost of the wireless headset circuit. In addition, the charging box can be upgraded without connecting a dedicated device, making the upgrade operation convenient and enabling users to upgrade the charging box without noticing.

[0073] Professionals should also be further aware that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the above description has generally described the components and steps of each example according to their functions. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0074] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wireless headset circuit, characterized in that: include: First battery; a first charging management unit, configured to manage charging of the first battery and having a charging terminal disconnectably connected to a charging box circuit; a first detection unit, configured to detect whether the charging voltage of the charging end is a first charging voltage or a second charging voltage greater than the first charging voltage; a first boost unit capable of being pre-charged by the second charging voltage; and A first upgrade unit is used to send a pulse signal to the first boost unit. When the first detection unit detects that the charging voltage at the charging end is the first charging voltage, the pulse signal causes the first boost unit to increase the voltage at the charging end to a first voltage greater than the first charging voltage, so that the charging box circuit stops outputting the first charging voltage to the charging end, so that the first upgrade unit can send a program code for upgrading the charging box to the charging box circuit through the charging end.

2. The wireless headset circuit according to claim 1, wherein: The first boost unit includes: capacitance; a charging module, configured to charge the capacitor using the second charging voltage; and A switch module is provided between the charging end and the capacitor, and the pulse signal is used to control the switch module to close, so that the capacitor releases energy and raises the voltage at the charging end to the first voltage.

3. The wireless headset circuit according to claim 2, characterized in that: The charging module includes: a diode, wherein the anode of the diode is connected to the charging terminal, and the cathode of the diode is connected to the capacitor; or a switch connected between the charging terminal and the capacitor; and A first comparator, wherein a first input terminal of the first comparator is connected to the charging terminal, a second input terminal of the first comparator is connected to the capacitor, and an output terminal of the first comparator is connected to the switch to control the closing or opening of the switch.

4. The wireless headset circuit according to any one of claims 1 to 3, characterized in that: The first upgrade unit is further configured to simultaneously send the pulse signal to the first charging management unit, wherein the pulse signal is configured to cause the first charging management unit to stop charging the first battery; and / or The first detection unit includes a second comparator, a first input end of the second comparator is connected to the charging end, a second input end of the second comparator is connected to a first reference voltage, and an output end of the second comparator is connected to the first upgrading unit, wherein the first reference voltage is greater than the first charging voltage and less than the second charging voltage and the first voltage.

5. The wireless headset circuit according to any one of claims 1 to 3, characterized in that: The first upgrading unit includes: an analog-to-digital converter, configured to measure the charge level of the first battery; a wireless communication module and a first memory, wherein the wireless communication module is configured to receive the program code sent by the terminal device and store the program code in the first memory; The upgrade condition is that the program code is stored in the first memory and the power of the first battery is greater than the power required for the upgrade, and the first upgrade unit further includes: A first application processor is configured to send the pulse signal when the upgrade condition is met and convert the program code into a high-low level signal and send it to the charging box circuit a certain time after sending the pulse signal; or A first application processor is configured to send the pulse signal when the upgrade condition is met and convert the program code into a high or low level signal and then send it to the charging box circuit a certain time after sending the pulse signal; and The first communication module is used to adjust the high and low level signals output by the first application processor to high and low level signals that meet the requirements of the charging box circuit.

6. A wireless headset, characterized in that: The wireless earphone circuit comprises the wireless earphone circuit according to any one of claims 1 to 5.

7. A charging box circuit, characterized in that: include: Second battery; a second charging management unit, configured to manage charging of the second battery; a second boost unit, configured to adjust the voltage of the second battery to one of a first charging voltage and a second charging voltage greater than the first charging voltage according to set requirements, and then output the voltage to the charging terminal of the wireless headset circuit; wherein, when the second boost unit outputs the second charging voltage, it is capable of charging the first boost unit of the wireless headset circuit, so that when the charging box needs to be upgraded, the first boost unit can adjust the voltage at the charging terminal to a first voltage greater than the first charging voltage; A second detection unit and a second upgrade unit, the second detection unit is used to output a feedback signal to the second upgrade unit when it detects that the voltage at the charging end is the first voltage during the period when the second boost unit outputs the first charging voltage, so that the second upgrade unit outputs a first control signal to the second boost unit, and the first control signal causes the output end of the second boost unit to stop outputting the first charging voltage, so that the second upgrade unit can receive the program code for upgrading the charging box sent by the wireless headset circuit through the charging end.

8. The charging box circuit according to claim 7, characterized in that: The setting requirement includes making the first duration for the second boost unit to output the first charging voltage longer than the second duration for outputting the second charging voltage; the second upgrade unit is configured to send a setting instruction to the second boost unit and the second detection unit, the setting instruction being configured to set the value of the first charging voltage, the first duration, the value of the second charging voltage, and the second duration; and / or, The second upgrade unit is also used to send a second control signal to the second boost unit after the upgrade is completed. The second control signal is used to enable the second boost unit to continue to output the charging voltage to the charging end. The setting requirements include enabling the second boost unit to output the second charging voltage for a set time after the upgrade is completed.

9. The charging box circuit according to claim 7 or 8, characterized in that: The second detection unit includes a third comparator, an inverter, and a D flip-flop, wherein a first input terminal of the third comparator is connected to the charging terminal, and a second input terminal of the third comparator is connected to a second reference voltage, wherein the second reference voltage is greater than the first charging voltage and less than the first voltage; an output terminal of the inverter is connected to a first input terminal of the D flip-flop, an input terminal of the inverter and a second input terminal of the D flip-flop receive the setting instruction, a clock input terminal of the D flip-flop is connected to the output terminal of the third comparator, and an output terminal of the D flip-flop outputs the feedback signal; or, The second upgrade unit includes a second communication module, a second application processor and a second memory. The second communication module is used to convert the high and low level signals representing the program code at the charging end into digital signals that can be recognized by the second application processor; the second application processor is used to convert the digital signal into the program code and update it into the second memory and send a control signal to the second boost unit.

10. A charging box, characterized in that: Includes a charging box circuit according to any one of claims 7-9.

11. A charging box upgrade method, characterized in that: include: When the first detection unit detects that the voltage at the charging end is a first charging voltage and meets an upgrade condition, the first boost unit of the wireless headset circuit increases the voltage at the charging end to a first voltage greater than the first charging voltage, so that the charging box circuit stops charging the charging end, wherein the first boost unit can be pre-charged with a second charging voltage greater than the first charging voltage at the charging end. The upgrade condition is that a program code for upgrading the charging box sent by a mobile terminal is stored in the first memory of the wireless headset circuit, and the power of the first battery of the wireless headset is greater than the power required for the upgrade; The first upgrading unit of the wireless headset circuit sends the program code to the charging box circuit via the charging terminal; and / or, During charging, the second boost unit of the charging box circuit adjusts the voltage of the second battery to one of a first charging voltage and a second charging voltage greater than the first charging voltage according to set requirements, and then outputs the voltage to the charging end of the wireless headset circuit. When the second boost unit outputs the second charging voltage, it can charge the first boost unit of the wireless headset circuit, so that when the charging box needs to be upgraded, the first boost unit can adjust the voltage at the charging end to a first voltage greater than the first charging voltage. When the second detection unit of the charging box circuit detects that the voltage of the charging end is the first voltage during the period when the second boost unit outputs the first charging voltage, the second detection unit outputs a feedback signal to the second upgrade unit, so that the second upgrade unit outputs a first control signal to the second boost unit. The first control signal causes the output end of the second boost unit to stop outputting the first charging voltage, so that the second upgrade unit can receive the program code for upgrading the charging box sent by the wireless headset circuit through the charging end and update it into the second memory; After the upgrade is completed, the second upgrade unit sends a second control signal to the second boost unit, and the second control signal enables the second boost unit to continue to output the charging voltage to the charging end.

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