Charging control circuit, method, device and wireless earphone charging device

Abstract

The present disclosure relates to a charging control circuit, method, device and wireless earphone charging device. The charging control circuit belongs to the technical field of charging control of wireless earphones, and comprises an impedance detection circuit, the impedance detection circuit comprising a first controller configured to detect a connection impedance between the earphone contact and the charging contact, and generate a first charging control instruction when the connection impedance is greater than a preset impedance; a first switch circuit, a first end of the first switch circuit being connected to a first end of the first controller, the charging contact comprising a first charging contact, a second end of the first switch circuit being connected to the first charging contact, and a third end of the first switch circuit being connected to an input power supply, the first switch circuit being configured to disconnect a power supply output path between the earphone box and the earphone according to the first charging control instruction.

Description

TECHNICAL FIELD

[0001] The embodiment of the present disclosure relates to the technical field of charging control of wireless earphones, and more particularly to a charging control circuit, method, device and wireless earphone charging device. BACKGROUND

[0002] The wireless earphone includes an earphone and an earphone box, the earphone is used for playing audio, and the earphone box is used for charging the wireless earphone.

[0003] At present, the earphone battery capacity is generally less than 60 mAh, and the earphone box battery capacity is generally 500 mAh. Considering the useless power loss of the earphone during charging, the earphone can be charged about 9 times when the earphone box is fully charged.

[0004] However, in the process of frequent use of the wireless earphone by the user, the earphone is often not placed in the correct position after being placed in the charging box, resulting in a large contact impedance value between the wireless earphone and the charging box, thereby increasing the charging heat loss, affecting the charging efficiency, and further reducing the endurance. SUMMARY

[0005] An object of the embodiment of the present disclosure is to provide a new technical solution of a charging control circuit, method, device and wireless earphone charging device.

[0006] According to a first aspect of the present disclosure, a charging control circuit is provided, which is applied to a wireless earphone charging device, the wireless earphone charging device includes an earphone box for charging an earphone, the earphone is provided with earphone contacts, and the earphone box is provided with charging contacts, the earphone contacts and the charging contacts are one-to-one corresponding contact connection in the case of charging the earphone by the earphone box; the charging control circuit includes: an impedance detection circuit, the impedance detection circuit includes a first controller, the first controller is used for detecting the connection impedance between the earphone contacts and the charging contacts, and generating a first charging control instruction in the case that the connection impedance is greater than a preset impedance; a first switch circuit, a first end of the first switch circuit is connected to a first end of the first controller, the charging contacts include a first charging contact, a second end of the first switch circuit is connected to the first charging contact, and a third end of the first switch circuit is connected to an input power supply, the first switch circuit is used for disconnecting the power supply output path between the earphone box and the earphone according to the first charging control instruction.

[0007] Optionally, the impedance detection circuit includes a first resistor, the first resistor is connected in series between a second end of the first controller and the first charging contact, and a third end of the first controller is connected to the first charging contact.

[0008] Optionally, the charging control circuit includes a power management module disposed inside the charging case, used to provide input power to the earphones when the earphones are being charged through the earphone case, a first terminal of the power management module being connected to a third terminal of the first switching circuit, and the charging contacts including a second charging contact, the second terminal of the power management module being connected to the second charging contact.

[0009] Optionally, the charging control circuit includes a second controller, which is configured to receive the first charging control command and issue an abnormality reminder message according to the first charging control command when the earphones are being charged through the earphone case.

[0010] Optionally, the charging control circuit includes a second switching circuit, the first end of which is connected to a second controller, and the second switching circuit is used to control the conduction or cutoff of the impedance detection circuit.

[0011] Optionally, the charging control circuit includes a second resistor, the earphone contacts include a first earphone contact and a second earphone contact, a first end of a second switching circuit is connected to a first end of the second resistor, a second end of the second resistor is connected to the first earphone contact, and a second end of the second switching circuit is connected to the second earphone contact. When the earphones are charged through the earphone case, the first earphone contact is connected to the first charging contact, and the second earphone contact is connected to the second charging contact.

[0012] According to a second aspect of this disclosure, a charging control method is provided, characterized in that the method is applied to a wireless earphone charging device, the wireless earphone charging device including an earphone case for charging earphones, the earphones being provided with earphone contacts, and the earphone case containing charging contacts, wherein when the earphones are charged through the earphone case, the earphone contacts and the charging contacts are connected in a one-to-one correspondence; the method includes:

[0013] Obtain the connection impedance between the earphone contact and the charging contact;

[0014] When the connection impedance is greater than the preset impedance, a first charging control command is generated. The first charging control command includes an abnormality reminder command and a pause charging command.

[0015] The power output path between the earphone case and the earphones is disconnected according to the first charging control command.

[0016] Optionally, the method further includes: when the connection impedance is less than or equal to the preset impedance, connecting the power output path between the headphone box and the headphones.

[0017] According to a third aspect of this disclosure, a charging control device is also provided, characterized in that it includes: an impedance acquisition module for acquiring the connection impedance between the earphone contacts and the charging contacts; an instruction generation module for generating a first charging control instruction when the connection impedance is greater than a preset impedance, the first charging control instruction including an abnormality reminder instruction and a pause charging instruction; and a control module for controlling the disconnection of the power output path between the earphone case and the earphones according to the first charging control instruction.

[0018] According to a fourth aspect of this disclosure, a wireless earphone charging device is also provided, characterized in that it includes: an earphone case and the charging control circuit described in the first aspect, wherein the earphone case is used to charge the earphone, the earphone case is provided with a receiving cavity for accommodating the earphone, the receiving cavity is provided with charging contacts, the earphone is provided with earphone contacts, and when the earphone case is charging the earphone, the corresponding earphone contacts are electrically connected to the charging contacts; the first controller, power management module, first resistor and first switch circuit of the charging control circuit are disposed in the earphone case, and the second controller, second resistor and second switch circuit of the charging control circuit are disposed in the earphone.

[0019] One beneficial effect of this embodiment is that by setting an impedance detection circuit and a first switching circuit, the impedance detection circuit detects the connection impedance between the earphone contacts and the charging contacts. When the connection impedance is greater than a preset impedance, the power output path between the earphone case and the earphone is disconnected, thereby avoiding the increase in charging heat loss caused by excessive impedance, which can improve charging efficiency and increase the earphone's battery life.

[0020] Other features and advantages of the embodiments of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the embodiments of the present disclosure.

[0022] Figure 1 This is a schematic diagram of the charging control circuit in this embodiment;

[0023] Figure 2 A circuit diagram of the charging control circuit in one embodiment;

[0024] Figure 3 This is a flowchart illustrating a charging control method according to one embodiment;

[0025] Figure 4This is a block diagram of the charging control device in this embodiment;

[0026] Figure 5 This is a schematic diagram of the wireless earphone charging device provided in this embodiment. Detailed Implementation

[0027] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0028] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0029] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0030] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0032] This embodiment provides a charging control circuit applied to a wireless earphone charging device. In this embodiment, the wireless earphone charging device includes an earphone case for charging the earphones. The earphones are wireless and have earphone contacts. The earphone case contains charging contacts and a power source, which can be a rechargeable battery or a dry cell battery, or any other power supply that can provide power to the earphones. When charging the earphones through the earphone case, the earphone contacts and charging contacts are connected in a one-to-one correspondence. For example, the earphone contacts include a first earphone contact and a second earphone contact, and the charging contacts include a first charging contact and a second charging contact. When charging the earphones through the earphone case, the first earphone contact and the first charging contact are connected, and the second earphone contact and the second charging contact are connected to establish a charging path.

[0033] refer to Figure 1In this embodiment, the charging control circuit includes an impedance detection circuit 101 and a first switching circuit 103. The impedance detection circuit includes a first controller 102, which detects the connection impedance between the earphone contacts and the charging contacts. If the connection impedance is greater than a preset impedance, a first charging control command is generated. When the connection impedance between the earphone contacts and the charging contacts is too high, it will lead to increased heat loss of the earphones, reduced charging efficiency, and affected earphone lifespan. Therefore, the first charging control command in this embodiment is a command to disconnect the charging circuit.

[0034] In one example, the first controller can be an electrical component with control functions, such as an MCU controller, a microcontroller, or an integrated chip.

[0035] In order to disconnect the charging circuit, this embodiment provides a first switch circuit 103. The first end of the first switch circuit is connected to the first end of the first controller and is used to receive the first charging control command issued by the first controller. The charging contact includes the first charging contact. The second end of the first switch circuit is connected to the first charging contact. The third end of the first switch circuit is connected to the input power supply and is used to form a power output path. The first switch circuit is used to disconnect the power output path between the earphone case and the earphone according to the first charging control command.

[0036] In one example, the first switching circuit 103 may be equipped with a single-pole single-throw switch or a switching transistor or other switching device.

[0037] This embodiment sets up an impedance detection circuit and a first switching circuit. The impedance detection circuit detects the connection impedance between the earphone contacts and the charging contacts. When the connection impedance is greater than the preset impedance, the power output path between the earphone case and the earphone is disconnected, thereby avoiding the increase in charging heat loss caused by excessive impedance, which can improve charging efficiency and increase the earphone's battery life.

[0038] refer to Figure 1 The impedance detection circuit includes a first resistor R1, and the charging contact includes a first charging contact 111. The second terminal of the first switching circuit 103 is connected to the first charging contact 111. The first resistor R1 is connected in series between the second terminal of the first controller 102 and the first charging contact 111. The first resistor is a fixed resistor and serves to limit current. The third terminal of the first controller 102 is connected to the first charging contact and is used to monitor the voltage of the first charging contact, thereby calculating the impedance between the earphone contact and the earphone case contact.

[0039] In this embodiment, the charging control circuit includes a power management module 104, which is disposed inside the charging case. The power management module 104 provides input power to the earphones when they are being charged via the earphone case. The first terminal of the power management module 104 is connected to the third terminal of a first switching circuit, meaning the first switching circuit is connected in series between the power management module and the charging contacts, allowing the first switching circuit to disconnect the power transmission path between the earphone case and the earphones. The charging contacts include a second charging contact 112, and the second terminal of the power management module is connected to the second charging contact. In this embodiment, the second terminal of the power management module is connected to the negative terminal of the power supply, meaning the second charging contact is connected to the negative terminal, and the first charging contact is connected to the positive terminal, thus forming a closed-loop charging circuit when the earphone contacts and the charging contacts are in contact.

[0040] The charging control circuit in this embodiment further includes a second controller 106 and a second switch circuit 105. The second controller 106 is disposed inside the earphone. When the earphones are being charged via the earphone case, the second controller 106 receives a first charging control command and issues a reminder message based on the first charging control command. In this embodiment, the first charging control command disconnects the charging circuit, indicating a problem with the placement of the earphones in the earphone case. The reminder message is then issued to remind the user to place the earphones correctly.

[0041] In one example, the alert could be a light signal, such as an indicator light on the headphones or headphone case that illuminates or flashes.

[0042] In one example, the reminder could be a text message, such as a pop-up notification appearing on the terminal device interface when the headphones are connected to a paired device, indicating that the headphones are not placed in the correct position in the charging case.

[0043] In this embodiment, the second switch circuit is located inside the earphone. The first terminal of the second switch circuit is connected to the second controller. The second switch circuit is used to control the conduction or deactivation of the impedance detection circuit. This design allows users to customize whether the impedance detection function is enabled or disabled. For example, when the second switch circuit is in the off state, regardless of whether the first switch circuit is in the on or off state, the impedance detection circuit remains in the off state and cannot detect impedance.

[0044] When the second switching circuit is in the ON state, if the first switching circuit is in the ON state, the impedance detection circuit is ON. If the first switching circuit is in the OFF state, the impedance detection circuit is OFF.

[0045] It should be noted that the first switching circuit is in the on state by default to ensure that the impedance detection circuit operates normally.

[0046] In this embodiment, the charging control circuit includes a second resistor R2, and the earphone contacts include a first earphone contact 113 and a second earphone contact 114. The first terminal of the second switching circuit 105 is connected to the first terminal of the second resistor R2, the second terminal of the second resistor is connected to the first earphone contact 113, and the second terminal of the second switching circuit is connected to the second earphone contact 114. When charging the earphones through the earphone case, the first earphone contact 113 is connected to the first charging contact 111, and the second earphone contact 114 is connected to the second charging contact 112. The second resistor is a fixed resistor, which limits the current.

[0047] refer to Figure 2 , Figure 2 This is the equivalent circuit of the charging control circuit in this embodiment, wherein the connection impedance between the first charging contact and the first earphone contact is RC1, the connection impedance between the second charging contact and the second earphone contact is RC2, R1 is the first resistor, R2 is the second resistor, U1 is the first controller, U2 is the second controller, and U3 is the power management module. The calculation method for the connection impedance in this embodiment is explained below:

[0048] When the wireless earbuds are placed in the charging case, the charging case detects that the earbuds have been inserted. At this time, the first switching circuit is in the on state by default. The charging case only communicates with the earbuds but does not charge them. U1 outputs a high level through the PA1 pin. U2 controls the second switching circuit to conduct, establishing a connection between the first and second earbud contacts. At this time, R1, R2, RC1, and RC2 form a loop. Meanwhile, U1 detects the voltage value at point A through the PA2 pin and marks it as U. A The output voltage of PA1 is Uo.

[0049] From the relationship between resistance and voltage in a circuit, we can know that:

[0050] U A =Uo*(RC1+R2+RC2) / (R1+RC1+R2+RC2)

[0051] In one example, if the charging contacts and earphone contacts are properly connected, the values ​​of RC1 + RC2 are constant across different wireless earphone products. Assume the connection impedances RC1 and RC2 need to be less than or equal to 100mΩ. Setting RC1 and RC2 to 100mΩ (0.1Ω), and R1 = R2 = 2Ω, then the maximum voltage when the charging contacts and earphone contacts are properly connected is:

[0052] U H =U A =Uo*(RC1+R2+RC2) / (R1+RC1+R2+RC2)=2.1*Uo / 4.1

[0053] Then it can be done by comparing the actual detected UA with U H The relationship between the magnitudes of R1, R2, RC1, and RC2 is used to determine the connection impedance between the charging contacts and the earphone contacts. It's understandable that, since R1, R2, RC1, and RC2 are connected in series, when the current in the circuit is constant, the voltage is directly proportional to the resistance. That is, the larger the resistance at point A, the greater the voltage U. A The larger the value of U, the more... A ≤U H At this point, the actual connection impedance will be less than 100mΩ, indicating that the earphones are placed accurately in the charging case, making good contact with the charging case, and the connection impedance is less than the preset impedance, meeting the charging requirements. At this time, the second switch circuit controlled by U2 inside the earphones is disconnected, and the PA1 pin is configured to a high-impedance state. Simultaneously, both PA1 and PA2 pins of U1 are configured to a high-impedance state. The PA3 pin controls the first switch circuit to conduct, and the charging case begins charging the earphones.

[0054] When U A >U H When the current in the circuit is constant, the connection impedance is greater than the preset impedance, indicating that the earphone is not placed correctly in the charging case and the connection impedance value does not meet the charging requirements. At this time, the U1 control will issue an abnormal reminder command.

[0055] It should be noted that after U1 issues an anomaly alert command, it continues to monitor U. A Size, and with U H In comparison, until U A ≤U H The charging case begins charging the earbuds.

[0056] The above is the charging control circuit provided in this embodiment. The impedance detection circuit detects the connection impedance between the earphone contacts and the charging contacts. When the connection impedance is greater than the preset impedance, the power output path between the earphone case and the earphone is disconnected by the first switching circuit, thereby avoiding the increase in charging heat loss caused by excessive impedance, which can improve charging efficiency and increase the earphone battery life.

[0057] This embodiment provides a charging control method applied to a wireless earphone charging device. The wireless earphone charging device includes an earphone case for charging the earphones. The earphones are provided with earphone contacts, and the earphone case is provided with charging contacts. When the earphones are charged through the earphone case, the earphone contacts and the charging contacts are connected in a one-to-one correspondence. This embodiment provides a charging control method that can be executed by a first controller in a charging control circuit.

[0058] refer to Figure 3 A charging control method includes:

[0059] S310, Obtain the connection impedance between the headphone contacts and the charging contacts.

[0060] In this embodiment, the connection impedance between the earphone contacts and the charging contacts can be obtained through the charging control circuit described above. This connection impedance can be obtained by acquiring the voltage between the earphone contacts and the charging contacts, as well as the current controlled by the charging circuit.

[0061] The charging control circuit in this embodiment is the same as that in the above embodiment. Figure 1 Or the charging control circuit shown in Figure 2.

[0062] S320. When the connection impedance is greater than the preset impedance, generate the first charging control command.

[0063] In this embodiment, the first charging control command includes an abnormality reminder command and a pause charging command, wherein the abnormality reminder command is used to remind the user to place the earphones correctly.

[0064] In one example, the alert could be a light signal, such as an indicator light on the headphones or headphone case that illuminates or flashes.

[0065] In one example, the reminder could be a text message, such as a pop-up notification appearing on the terminal device interface when the headphones are connected to a paired device, indicating that the headphones are not placed in the correct position in the charging case.

[0066] The pause charging command is used to control the first switch circuit to disconnect, interrupting the power output path between the power management module and the headphones.

[0067] S330: Disconnect the power output path between the earphone case and the earphones according to the first charging control command.

[0068] The first controller sends a first charging control command to the first switching circuit. The first switching circuit executes the first charging control command and disconnects the power output path between the earphone case and the earphones by disconnecting its own circuit.

[0069] In this embodiment, the power output path between the earphone case and the earphones is connected when the connection impedance is less than or equal to the preset impedance. The specific calculation method for the connection impedance is described in the above embodiments of the charging control circuit, and will not be repeated here to avoid repetition.

[0070] The above is the charging control method provided in this embodiment. The impedance detection circuit detects the connection impedance between the earphone contacts and the charging contacts. When the connection impedance is greater than the preset impedance, the power output path between the earphone case and the earphone is disconnected by the first switching circuit, thereby avoiding the increase in charging heat loss caused by excessive impedance, which can improve charging efficiency and increase the earphone's battery life.

[0071] This embodiment provides a charging control device, see reference.Figure 4 The device includes:

[0072] Impedance acquisition module 401 is used to acquire the connection impedance between the headphone contacts and the charging contacts.

[0073] The instruction generation module 402 is used to generate a first charging control instruction when the connection impedance is greater than a preset impedance. The first charging control instruction includes an abnormality reminder instruction and a pause charging instruction.

[0074] The control module 403 is used to disconnect the power output path between the earphone case and the earphones according to the first charging control command.

[0075] In one example, the control module 403 is also used to connect the power output path between the headphone box and the headphones when the connection impedance is less than or equal to a preset impedance.

[0076] The charging control device can be located in the first controller.

[0077] This embodiment detects the connection impedance between the earphone contacts and the charging contacts through an impedance detection circuit. When the connection impedance is greater than the preset impedance, the power output path between the earphone case and the earphone is disconnected through the first switching circuit, thereby avoiding the increase in charging heat loss caused by excessive impedance, which can improve charging efficiency and increase the earphone's battery life.

[0078] This embodiment provides a wireless earphone charging device, see reference. Figure 5 The wireless earphone charging device includes an earphone case 501 and a charging control circuit. In this embodiment, the earphone case is used to charge the earphone 502. The earphone case is provided with a receiving cavity for accommodating the earphone 502. A charging contact is provided in the receiving cavity. The earphone is provided with an earphone contact. When the earphone case is charging the earphone, the corresponding earphone contact is electrically connected to the charging contact.

[0079] The charging control circuit comprises a first controller 102, a power management module 104, a first resistor R1, and a first switch circuit 103, all housed within the earphone case 501. The charging control circuit also comprises a second controller 106, a second resistor R2, and a second switch circuit 105, all housed within the earphone 502. The specific connections between these components are described in the embodiments of the charging control circuit and will not be repeated here.

[0080] This embodiment detects the connection impedance between the earphone contacts and the charging contacts through an impedance detection circuit. When the connection impedance is greater than the preset impedance, the power output path between the earphone case and the earphone is disconnected through the first switching circuit, thereby avoiding the increase in charging heat loss caused by excessive impedance, which can improve charging efficiency and increase the earphone's battery life.

[0081] This invention can be a system, method, and / or computer program product. The computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for causing a first controller to implement various aspects of the invention.

[0082] Computer-readable storage media can be tangible devices capable of holding and storing instructions for use by an instruction execution device. Computer-readable storage media can be, for example—but not limited to—electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination thereof. The computer-readable storage media used herein are not to be construed as transient signals themselves, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or electrical signals transmitted through wires.

[0083] The computer-readable program instructions described herein can be downloaded from computer-readable storage media to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage media in the respective computing / processing device.

[0084] The computer program instructions used to perform the operations of this invention may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuitry, such as programmable logic circuitry, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), is personalized by utilizing state information from the computer-readable program instructions. This electronic circuitry can execute the computer-readable program instructions to implement various aspects of the invention.

[0085] Various aspects of the present invention are described herein with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-readable program instructions.

[0086] These computer-readable program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that, when executed by the processor of the computer or other programmable data processing apparatus, they create means for implementing the functions / actions specified in one or more blocks of the flowchart and / or block diagram. These computer-readable program instructions can also be stored in a computer-readable storage medium that causes a computer, programmable data processing apparatus, and / or other device to operate in a particular manner; thus, the computer-readable medium storing the instructions comprises an article of manufacture that includes instructions for implementing aspects of the functions / actions specified in one or more blocks of the flowchart and / or block diagram.

[0087] Computer-readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable data processing apparatus, or other device to produce a computer-implemented process, thereby causing the instructions executed on the computer, other programmable data processing apparatus, or other device to perform the functions / actions specified in one or more boxes of a flowchart and / or block diagram.

[0088] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of an instruction containing one or more executable instructions for implementing a specified logical function. In some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions. It will be known to those skilled in the art that implementation in hardware, implementation in software, and implementation using a combination of software and hardware are equivalent.

[0089] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of the invention is defined by the appended claims.

Claims

1. A charging control circuit, characterized in that, An application is made in a wireless earphone charging device, the wireless earphone charging device including an earphone case for charging earphones, the earphones being provided with earphone contacts, and the earphone case being provided with charging contacts, wherein when the earphones are charged through the earphone case, the earphone contacts and the charging contacts are connected in a one-to-one correspondence. The charging control circuit includes: An impedance detection circuit is provided, comprising a first controller, which is used to detect the connection impedance between the earphone contact and the charging contact, and generate a first charging control command when the connection impedance is greater than a preset impedance. A first switching circuit, wherein a first terminal of the first switching circuit is connected to a first terminal of the first controller, the charging contact includes a first charging contact, a second terminal of the first switching circuit is connected to the first charging contact, and a third terminal of the first switching circuit is connected to an input power supply, and the first switching circuit is used to disconnect the power output path between the earphone case and the earphone according to the first charging control command. The charging control circuit includes a second controller, which is used to receive the first charging control command and issue an abnormality reminder message according to the first charging control command when the earphones are being charged through the earphone case. The charging control circuit further includes a second switching circuit, the first end of which is connected to the second controller. The second switching circuit is used to control the conduction or cutoff of the impedance detection circuit.

2. The charging control circuit according to claim 1, characterized in that, The impedance detection circuit includes a first resistor connected in series between the second terminal of the first controller and the first charging contact, and the third terminal of the first controller is connected to the first charging contact.

3. The charging control circuit according to claim 1, characterized in that, The charging control circuit includes a power management module disposed inside the earphone case, which provides input power to the earphones when the earphones are being charged through the earphone case. A first terminal of the power management module is connected to a third terminal of the first switching circuit. The charging contacts include a second charging contact, and a second terminal of the power management module is connected to the second charging contact.

4. The charging control circuit according to claim 1, characterized in that, The charging control circuit includes a second resistor, and the earphone contacts include a first earphone contact and a second earphone contact. The first end of the second switching circuit is connected to the first end of the second resistor, the second end of the second resistor is connected to the first earphone contact, and the second end of the second switching circuit is connected to the second earphone contact. When the earphones are charged through the earphone case, the first earphone contact is connected to the first charging contact, and the second earphone contact is connected to the second charging contact.

5. A charging control method, characterized in that, The method is applied to a wireless earphone charging device having the charging control circuit according to any one of claims 1-4, the method comprising: Obtain the connection impedance between the earphone contact and the charging contact; When the connection impedance is greater than the preset impedance, a first charging control command is generated. The first charging control command includes an abnormality reminder command and a pause charging command. According to the first charging control command, the power output path between the earphone case and the earphone is disconnected. Control the opening or closing of the path for obtaining the connection impedance.

6. The method according to claim 5, characterized in that, The method further includes: When the connection impedance is less than or equal to the preset impedance, the power output path between the earphone case and the earphone is connected.

7. A charging control device, characterized in that, The charging control device includes the charging control circuit according to any one of claims 1-4, wherein the charging control device comprises: Impedance acquisition module, used to acquire the connection impedance between the headphone contacts and the charging contacts; The instruction generation module is used to generate a first charging control instruction when the connection impedance is greater than a preset impedance. The first charging control instruction includes an abnormality reminder instruction and a pause charging instruction. The control module is used to disconnect the power output path between the earphone case and the earphone according to the first charging control command; A module for controlling the opening or closing of the path for obtaining the connection impedance.

8. A wireless earphone charging device, characterized in that, include: The earphone case and the charging control circuit according to any one of claims 1-4, wherein the earphone case is used to charge the earphone, the earphone case is provided with a receiving cavity for accommodating the earphone, a charging contact is provided in the receiving cavity, the earphone is provided with an earphone contact, and when the earphone case is charging the earphone, the corresponding earphone contact is electrically connected to the charging contact. The first controller, power management module, first resistor, and first switch circuit of the charging control circuit are disposed inside the earphone case, and the second controller, second resistor, and second switch circuit of the charging control circuit are disposed inside the earphone.

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